tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/linusw/linux-gpio.git gpio-descriptors-spi head: 6e5614b6476001adb8ce6e2859bc2ca0a4339398 commit: 6e5614b6476001adb8ce6e2859bc2ca0a4339398 [5/5] slask config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 6e5614b6476001adb8ce6e2859bc2ca0a4339398 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from include/linux/bitops.h:5:0, from include/linux/kernel.h:12, from include/linux/list.h:9, from include/linux/module.h:9, from drivers//spi/spi-pl022.c:17: drivers//spi/spi-pl022.c: In function 'pl022_set_cs': >> drivers//spi/spi-pl022.c:442:22: error: 'struct pl022' has no member named 'cur_cs'; did you mean 'cur_msg'? tmp &= ~BIT(pl022->cur_cs); ^ include/linux/bits.h:8:30: note: in definition of macro 'BIT' #define BIT(nr) (UL(1) << (nr)) ^~ drivers//spi/spi-pl022.c:444:21: error: 'struct pl022' has no member named 'cur_cs'; did you mean 'cur_msg'? tmp |= BIT(pl022->cur_cs); ^ include/linux/bits.h:8:30: note: in definition of macro 'BIT' #define BIT(nr) (UL(1) << (nr)) ^~ drivers//spi/spi-pl022.c: In function 'giveback': >> drivers//spi/spi-pl022.c:493:4: error: implicit declaration of function 'pl022_cs_control'; did you mean 'pl022_set_cs'? [-Werror=implicit-function-declaration] pl022_cs_control(pl022, SSP_CHIP_DESELECT); ^~~~~~~~~~~~~~~~ pl022_set_cs drivers//spi/spi-pl022.c: In function 'pl022_transfer_one_message': drivers//spi/spi-pl022.c:1571:9: error: 'struct pl022' has no member named 'cur_cs'; did you mean 'cur_msg'? pl022->cur_cs = pl022->chipselects[msg->spi->chip_select]; ^~~~~~ cur_msg >> drivers//spi/spi-pl022.c:1571:23: error: 'struct pl022' has no member named 'chipselects' pl022->cur_cs = pl022->chipselects[msg->spi->chip_select]; ^~ drivers//spi/spi-pl022.c: In function 'pl022_setup': >> drivers//spi/spi-pl022.c:1852:4: error: implicit declaration of function 'of_property_read_u32' [-Werror=implicit-function-declaration] of_property_read_u32(np, "pl022,interface", ^~~~~~~~~~~~~~~~~~~~ >> drivers//spi/spi-pl022.c:1914:7: error: implicit declaration of function 'gpio_is_valid'; did you mean 'uuid_is_valid'? [-Werror=implicit-function-declaration] if (!gpio_is_valid(pl022->chipselects[spi->chip_select])) ^~~~~~~~~~~~~ uuid_is_valid drivers//spi/spi-pl022.c:1914:26: error: 'struct pl022' has no member named 'chipselects' if (!gpio_is_valid(pl022->chipselects[spi->chip_select])) ^~ drivers//spi/spi-pl022.c: In function 'pl022_platform_data_dt_get': >> drivers//spi/spi-pl022.c:2081:11: error: implicit declaration of function 'of_property_read_bool' [-Werror=implicit-function-declaration] pd->rt = of_property_read_bool(np, "pl022,rt"); ^~~~~~~~~~~~~~~~~~~~~ drivers//spi/spi-pl022.c: In function 'pl022_probe': drivers//spi/spi-pl022.c:2125:7: error: 'struct pl022' has no member named 'chipselects' pl022->chipselects = devm_kcalloc(dev, num_cs, sizeof(int), ^~ drivers//spi/spi-pl022.c:2127:12: error: 'struct pl022' has no member named 'chipselects' if (!pl022->chipselects) { ^~ drivers//spi/spi-pl022.c:2137:8: warning: statement with no effect [-Wunused-value] master->use_gpio_descriptors; ~~~~~~^~~~~~~~~~~~~~~~~~~~~~ drivers//spi/spi-pl022.c:2150:9: error: 'struct pl022' has no member named 'chipselects' pl022->chipselects[i] = i; ^~ >> drivers//spi/spi-pl022.c:2153:18: error: implicit declaration of function 'of_get_named_gpio'; did you mean 'fwnode_get_named_gpiod'? [-Werror=implicit-function-declaration] int cs_gpio = of_get_named_gpio(np, "cs-gpios", i); ^~~~~~~~~~~~~~~~~ fwnode_get_named_gpiod drivers//spi/spi-pl022.c:2160:9: error: 'struct pl022' has no member named 'chipselects' pl022->chipselects[i] = cs_gpio; ^~ >> drivers//spi/spi-pl022.c:2163:9: error: implicit declaration of function 'devm_gpio_request'; did you mean 'devm_gpiod_put'? [-Werror=implicit-function-declaration] if (devm_gpio_request(dev, cs_gpio, "ssp-pl022")) ^~~~~~~~~~~~~~~~~ devm_gpiod_put >> drivers//spi/spi-pl022.c:2167:14: error: implicit declaration of function 'gpio_direction_output'; did you mean 'gpiod_direction_output'? [-Werror=implicit-function-declaration] else if (gpio_direction_output(cs_gpio, 1)) ^~~~~~~~~~~~~~~~~~~~~ gpiod_direction_output cc1: some warnings being treated as errors vim +442 drivers//spi/spi-pl022.c b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 421 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 422 static void pl022_set_cs(struct spi_device *spi, bool enable) db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 423 { 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 424 struct pl022 *pl022 = spi_controller_get_devdata(spi->controller); db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 425 u32 tmp; db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 426 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 427 /* 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 428 * This callback will ONLY be called of no GPIO descriptors were found 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 429 * for the device, so we know we are dealing exclusively with variants 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 430 * that have internal CS control here, but just to be sure: extra check 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 431 * for now. 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 432 */ 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 433 if (!pl022->vendor->internal_cs_ctrl) { 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 434 dev_err(&spi->dev, 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 435 "called internal CS control on unsupported device\n"); 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 436 return; 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 437 } 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 438 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 439 /* We draw a line low here to imply we enable it */ db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 440 tmp = readw(SSP_CSR(pl022->virtbase)); 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 441 if (enable) db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 @442 tmp &= ~BIT(pl022->cur_cs); db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 443 else db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 @444 tmp |= BIT(pl022->cur_cs); db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 445 writew(tmp, SSP_CSR(pl022->virtbase)); db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 446 } db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 447 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 448 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 449 * giveback - current spi_message is over, schedule next message and call b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 450 * callback of this message. Assumes that caller already b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 451 * set message->status; dma and pio irqs are blocked b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 452 * @pl022: SSP driver private data structure b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 453 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 454 static void giveback(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 455 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 456 struct spi_transfer *last_transfer; 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 457 pl022->next_msg_cs_active = false; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 458 23e2c2aa45a213e drivers/spi/spi-pl022.c Axel Lin 2014-02-12 459 last_transfer = list_last_entry(&pl022->cur_msg->transfers, 23e2c2aa45a213e drivers/spi/spi-pl022.c Axel Lin 2014-02-12 460 struct spi_transfer, transfer_list); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 461 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 462 /* Delay if requested before any change in chip select */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 463 if (last_transfer->delay_usecs) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 464 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 465 * FIXME: This runs in interrupt context. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 466 * Is this really smart? b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 467 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 468 udelay(last_transfer->delay_usecs); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 469 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 470 if (!last_transfer->cs_change) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 471 struct spi_message *next_msg; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 472 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 473 /* 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 474 * cs_change was not set. We can keep the chip select 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 475 * enabled if there is message in the queue and it is 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 476 * for the same spi device. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 477 * b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 478 * We cannot postpone this until pump_messages, because b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 479 * after calling msg->complete (below) the driver that b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 480 * sent the current message could be unloaded, which b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 481 * could invalidate the cs_control() callback... b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 482 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 483 /* get a pointer to the next message, if any */ ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 484 next_msg = spi_get_next_queued_message(pl022->master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 485 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 486 /* 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 487 * see if the next and current messages point 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 488 * to the same spi device. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 489 */ 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 490 if (next_msg && next_msg->spi != pl022->cur_msg->spi) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 491 next_msg = NULL; 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 492 if (!next_msg || pl022->cur_msg->state == STATE_ERROR) f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 @493 pl022_cs_control(pl022, SSP_CHIP_DESELECT); 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 494 else 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 495 pl022->next_msg_cs_active = true; ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 496 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 497 } 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 498 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 499 pl022->cur_msg = NULL; 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 500 pl022->cur_transfer = NULL; 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 501 pl022->cur_chip = NULL; fd316941cfee1fb drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2012-06-12 502 fd316941cfee1fb drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2012-06-12 503 /* disable the SPI/SSP operation */ fd316941cfee1fb drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2012-06-12 504 writew((readw(SSP_CR1(pl022->virtbase)) & fd316941cfee1fb drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2012-06-12 505 (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); fd316941cfee1fb drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2012-06-12 506 cd6fa8d2ca53cac drivers/spi/spi-pl022.c Alexander Sverdlin 2015-02-27 507 spi_finalize_current_message(pl022->master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 508 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 509 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 510 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 511 * flush - flush the FIFO to reach a clean state b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 512 * @pl022: SSP driver private data structure b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 513 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 514 static int flush(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 515 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 516 unsigned long limit = loops_per_jiffy << 1; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 517 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 518 dev_dbg(&pl022->adev->dev, "flush\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 519 do { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 520 while (readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 521 readw(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 522 } while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_BSY) && limit--); fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 523 fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 524 pl022->exp_fifo_level = 0; fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 525 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 526 return limit; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 527 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 528 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 529 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 530 * restore_state - Load configuration of current chip b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 531 * @pl022: SSP driver private data structure b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 532 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 533 static void restore_state(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 534 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 535 struct chip_data *chip = pl022->cur_chip; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 536 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 537 if (pl022->vendor->extended_cr) 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 538 writel(chip->cr0, SSP_CR0(pl022->virtbase)); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 539 else b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 540 writew(chip->cr0, SSP_CR0(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 541 writew(chip->cr1, SSP_CR1(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 542 writew(chip->dmacr, SSP_DMACR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 543 writew(chip->cpsr, SSP_CPSR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 544 writew(DISABLE_ALL_INTERRUPTS, SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 545 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 546 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 547 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 548 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 549 * Default SSP Register Values b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 550 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 551 #define DEFAULT_SSP_REG_CR0 ( \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 552 GEN_MASK_BITS(SSP_DATA_BITS_12, SSP_CR0_MASK_DSS, 0) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 553 GEN_MASK_BITS(SSP_INTERFACE_MOTOROLA_SPI, SSP_CR0_MASK_FRF, 4) | \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 554 GEN_MASK_BITS(SSP_CLK_POL_IDLE_LOW, SSP_CR0_MASK_SPO, 6) | \ ee2b805c8eb6459 drivers/spi/amba-pl022.c Linus Walleij 2009-08-15 555 GEN_MASK_BITS(SSP_CLK_SECOND_EDGE, SSP_CR0_MASK_SPH, 7) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 556 GEN_MASK_BITS(SSP_DEFAULT_CLKRATE, SSP_CR0_MASK_SCR, 8) \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 557 ) 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 558 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 559 /* ST versions have slightly different bit layout */ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 560 #define DEFAULT_SSP_REG_CR0_ST ( \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 561 GEN_MASK_BITS(SSP_DATA_BITS_12, SSP_CR0_MASK_DSS_ST, 0) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 562 GEN_MASK_BITS(SSP_MICROWIRE_CHANNEL_FULL_DUPLEX, SSP_CR0_MASK_HALFDUP_ST, 5) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 563 GEN_MASK_BITS(SSP_CLK_POL_IDLE_LOW, SSP_CR0_MASK_SPO, 6) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 564 GEN_MASK_BITS(SSP_CLK_SECOND_EDGE, SSP_CR0_MASK_SPH, 7) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 565 GEN_MASK_BITS(SSP_DEFAULT_CLKRATE, SSP_CR0_MASK_SCR, 8) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 566 GEN_MASK_BITS(SSP_BITS_8, SSP_CR0_MASK_CSS_ST, 16) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 567 GEN_MASK_BITS(SSP_INTERFACE_MOTOROLA_SPI, SSP_CR0_MASK_FRF_ST, 21) \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 568 ) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 569 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 570 /* The PL023 version is slightly different again */ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 571 #define DEFAULT_SSP_REG_CR0_ST_PL023 ( \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 572 GEN_MASK_BITS(SSP_DATA_BITS_12, SSP_CR0_MASK_DSS_ST, 0) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 573 GEN_MASK_BITS(SSP_CLK_POL_IDLE_LOW, SSP_CR0_MASK_SPO, 6) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 574 GEN_MASK_BITS(SSP_CLK_SECOND_EDGE, SSP_CR0_MASK_SPH, 7) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 575 GEN_MASK_BITS(SSP_DEFAULT_CLKRATE, SSP_CR0_MASK_SCR, 8) \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 576 ) 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 577 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 578 #define DEFAULT_SSP_REG_CR1 ( \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 579 GEN_MASK_BITS(LOOPBACK_DISABLED, SSP_CR1_MASK_LBM, 0) | \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 580 GEN_MASK_BITS(SSP_DISABLED, SSP_CR1_MASK_SSE, 1) | \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 581 GEN_MASK_BITS(SSP_MASTER, SSP_CR1_MASK_MS, 2) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 582 GEN_MASK_BITS(DO_NOT_DRIVE_TX, SSP_CR1_MASK_SOD, 3) \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 583 ) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 584 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 585 /* ST versions extend this register to use all 16 bits */ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 586 #define DEFAULT_SSP_REG_CR1_ST ( \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 587 DEFAULT_SSP_REG_CR1 | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 588 GEN_MASK_BITS(SSP_RX_MSB, SSP_CR1_MASK_RENDN_ST, 4) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 589 GEN_MASK_BITS(SSP_TX_MSB, SSP_CR1_MASK_TENDN_ST, 5) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 590 GEN_MASK_BITS(SSP_MWIRE_WAIT_ZERO, SSP_CR1_MASK_MWAIT_ST, 6) |\ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 591 GEN_MASK_BITS(SSP_RX_1_OR_MORE_ELEM, SSP_CR1_MASK_RXIFLSEL_ST, 7) | \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 592 GEN_MASK_BITS(SSP_TX_1_OR_MORE_EMPTY_LOC, SSP_CR1_MASK_TXIFLSEL_ST, 10) \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 593 ) 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 594 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 595 /* 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 596 * The PL023 variant has further differences: no loopback mode, no microwire 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 597 * support, and a new clock feedback delay setting. 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 598 */ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 599 #define DEFAULT_SSP_REG_CR1_ST_PL023 ( \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 600 GEN_MASK_BITS(SSP_DISABLED, SSP_CR1_MASK_SSE, 1) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 601 GEN_MASK_BITS(SSP_MASTER, SSP_CR1_MASK_MS, 2) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 602 GEN_MASK_BITS(DO_NOT_DRIVE_TX, SSP_CR1_MASK_SOD, 3) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 603 GEN_MASK_BITS(SSP_RX_MSB, SSP_CR1_MASK_RENDN_ST, 4) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 604 GEN_MASK_BITS(SSP_TX_MSB, SSP_CR1_MASK_TENDN_ST, 5) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 605 GEN_MASK_BITS(SSP_RX_1_OR_MORE_ELEM, SSP_CR1_MASK_RXIFLSEL_ST, 7) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 606 GEN_MASK_BITS(SSP_TX_1_OR_MORE_EMPTY_LOC, SSP_CR1_MASK_TXIFLSEL_ST, 10) | \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 607 GEN_MASK_BITS(SSP_FEEDBACK_CLK_DELAY_NONE, SSP_CR1_MASK_FBCLKDEL_ST, 13) \ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 608 ) 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 609 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 610 #define DEFAULT_SSP_REG_CPSR ( \ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 611 GEN_MASK_BITS(SSP_DEFAULT_PRESCALE, SSP_CPSR_MASK_CPSDVSR, 0) \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 612 ) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 613 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 614 #define DEFAULT_SSP_REG_DMACR (\ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 615 GEN_MASK_BITS(SSP_DMA_DISABLED, SSP_DMACR_MASK_RXDMAE, 0) | \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 616 GEN_MASK_BITS(SSP_DMA_DISABLED, SSP_DMACR_MASK_TXDMAE, 1) \ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 617 ) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 618 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 619 /** 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 620 * load_ssp_default_config - Load default configuration for SSP 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 621 * @pl022: SSP driver private data structure 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 622 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 623 static void load_ssp_default_config(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 624 { 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 625 if (pl022->vendor->pl023) { 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 626 writel(DEFAULT_SSP_REG_CR0_ST_PL023, SSP_CR0(pl022->virtbase)); 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 627 writew(DEFAULT_SSP_REG_CR1_ST_PL023, SSP_CR1(pl022->virtbase)); 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 628 } else if (pl022->vendor->extended_cr) { 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 629 writel(DEFAULT_SSP_REG_CR0_ST, SSP_CR0(pl022->virtbase)); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 630 writew(DEFAULT_SSP_REG_CR1_ST, SSP_CR1(pl022->virtbase)); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 631 } else { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 632 writew(DEFAULT_SSP_REG_CR0, SSP_CR0(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 633 writew(DEFAULT_SSP_REG_CR1, SSP_CR1(pl022->virtbase)); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 634 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 635 writew(DEFAULT_SSP_REG_DMACR, SSP_DMACR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 636 writew(DEFAULT_SSP_REG_CPSR, SSP_CPSR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 637 writew(DISABLE_ALL_INTERRUPTS, SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 638 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 639 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 640 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 641 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 642 * This will write to TX and read from RX according to the parameters b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 643 * set in pl022. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 644 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 645 static void readwriter(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 646 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 647 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 648 /* 25985edcedea639 drivers/spi/amba-pl022.c Lucas De Marchi 2011-03-30 649 * The FIFO depth is different between primecell variants. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 650 * I believe filling in too much in the FIFO might cause b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 651 * errons in 8bit wide transfers on ARM variants (just 8 words b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 652 * FIFO, means only 8x8 = 64 bits in FIFO) at least. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 653 * fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 654 * To prevent this issue, the TX FIFO is only filled to the fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 655 * unused RX FIFO fill length, regardless of what the TX fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 656 * FIFO status flag indicates. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 657 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 658 dev_dbg(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 659 "%s, rx: %p, rxend: %p, tx: %p, txend: %p\n", b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 660 __func__, pl022->rx, pl022->rx_end, pl022->tx, pl022->tx_end); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 661 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 662 /* Read as much as you can */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 663 while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 664 && (pl022->rx < pl022->rx_end)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 665 switch (pl022->read) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 666 case READING_NULL: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 667 readw(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 668 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 669 case READING_U8: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 670 *(u8 *) (pl022->rx) = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 671 readw(SSP_DR(pl022->virtbase)) & 0xFFU; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 672 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 673 case READING_U16: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 674 *(u16 *) (pl022->rx) = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 675 (u16) readw(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 676 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 677 case READING_U32: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 678 *(u32 *) (pl022->rx) = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 679 readl(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 680 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 681 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 682 pl022->rx += (pl022->cur_chip->n_bytes); fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 683 pl022->exp_fifo_level--; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 684 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 685 /* fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 686 * Write as much as possible up to the RX FIFO size b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 687 */ fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 688 while ((pl022->exp_fifo_level < pl022->vendor->fifodepth) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 689 && (pl022->tx < pl022->tx_end)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 690 switch (pl022->write) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 691 case WRITING_NULL: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 692 writew(0x0, SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 693 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 694 case WRITING_U8: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 695 writew(*(u8 *) (pl022->tx), SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 696 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 697 case WRITING_U16: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 698 writew((*(u16 *) (pl022->tx)), SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 699 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 700 case WRITING_U32: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 701 writel(*(u32 *) (pl022->tx), SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 702 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 703 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 704 pl022->tx += (pl022->cur_chip->n_bytes); fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 705 pl022->exp_fifo_level++; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 706 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 707 * This inner reader takes care of things appearing in the RX b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 708 * FIFO as we're transmitting. This will happen a lot since the b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 709 * clock starts running when you put things into the TX FIFO, 25985edcedea639 drivers/spi/amba-pl022.c Lucas De Marchi 2011-03-30 710 * and then things are continuously clocked into the RX FIFO. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 711 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 712 while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 713 && (pl022->rx < pl022->rx_end)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 714 switch (pl022->read) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 715 case READING_NULL: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 716 readw(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 717 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 718 case READING_U8: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 719 *(u8 *) (pl022->rx) = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 720 readw(SSP_DR(pl022->virtbase)) & 0xFFU; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 721 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 722 case READING_U16: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 723 *(u16 *) (pl022->rx) = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 724 (u16) readw(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 725 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 726 case READING_U32: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 727 *(u32 *) (pl022->rx) = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 728 readl(SSP_DR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 729 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 730 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 731 pl022->rx += (pl022->cur_chip->n_bytes); fc05475f867624d drivers/spi/amba-pl022.c Linus Walleij 2010-01-22 732 pl022->exp_fifo_level--; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 733 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 734 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 735 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 736 * When we exit here the TX FIFO should be full and the RX FIFO b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 737 * should be empty b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 738 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 739 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 740 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 741 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 742 * next_transfer - Move to the Next transfer in the current spi message b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 743 * @pl022: SSP driver private data structure b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 744 * b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 745 * This function moves though the linked list of spi transfers in the b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 746 * current spi message and returns with the state of current spi b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 747 * message i.e whether its last transfer is done(STATE_DONE) or b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 748 * Next transfer is ready(STATE_RUNNING) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 749 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 750 static void *next_transfer(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 751 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 752 struct spi_message *msg = pl022->cur_msg; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 753 struct spi_transfer *trans = pl022->cur_transfer; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 754 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 755 /* Move to next transfer */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 756 if (trans->transfer_list.next != &msg->transfers) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 757 pl022->cur_transfer = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 758 list_entry(trans->transfer_list.next, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 759 struct spi_transfer, transfer_list); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 760 return STATE_RUNNING; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 761 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 762 return STATE_DONE; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 763 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 764 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 765 /* b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 766 * This DMA functionality is only compiled in if we have b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 767 * access to the generic DMA devices/DMA engine. b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 768 */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 769 #ifdef CONFIG_DMA_ENGINE b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 770 static void unmap_free_dma_scatter(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 771 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 772 /* Unmap and free the SG tables */ b729889686afb7d drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 773 dma_unmap_sg(pl022->dma_tx_channel->device->dev, pl022->sgt_tx.sgl, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 774 pl022->sgt_tx.nents, DMA_TO_DEVICE); b729889686afb7d drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 775 dma_unmap_sg(pl022->dma_rx_channel->device->dev, pl022->sgt_rx.sgl, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 776 pl022->sgt_rx.nents, DMA_FROM_DEVICE); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 777 sg_free_table(&pl022->sgt_rx); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 778 sg_free_table(&pl022->sgt_tx); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 779 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 780 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 781 static void dma_callback(void *data) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 782 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 783 struct pl022 *pl022 = data; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 784 struct spi_message *msg = pl022->cur_msg; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 785 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 786 BUG_ON(!pl022->sgt_rx.sgl); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 787 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 788 #ifdef VERBOSE_DEBUG b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 789 /* b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 790 * Optionally dump out buffers to inspect contents, this is b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 791 * good if you want to convince yourself that the loopback b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 792 * read/write contents are the same, when adopting to a new b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 793 * DMA engine. b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 794 */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 795 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 796 struct scatterlist *sg; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 797 unsigned int i; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 798 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 799 dma_sync_sg_for_cpu(&pl022->adev->dev, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 800 pl022->sgt_rx.sgl, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 801 pl022->sgt_rx.nents, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 802 DMA_FROM_DEVICE); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 803 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 804 for_each_sg(pl022->sgt_rx.sgl, sg, pl022->sgt_rx.nents, i) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 805 dev_dbg(&pl022->adev->dev, "SPI RX SG ENTRY: %d", i); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 806 print_hex_dump(KERN_ERR, "SPI RX: ", b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 807 DUMP_PREFIX_OFFSET, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 808 16, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 809 1, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 810 sg_virt(sg), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 811 sg_dma_len(sg), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 812 1); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 813 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 814 for_each_sg(pl022->sgt_tx.sgl, sg, pl022->sgt_tx.nents, i) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 815 dev_dbg(&pl022->adev->dev, "SPI TX SG ENTRY: %d", i); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 816 print_hex_dump(KERN_ERR, "SPI TX: ", b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 817 DUMP_PREFIX_OFFSET, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 818 16, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 819 1, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 820 sg_virt(sg), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 821 sg_dma_len(sg), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 822 1); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 823 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 824 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 825 #endif b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 826 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 827 unmap_free_dma_scatter(pl022); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 828 25985edcedea639 drivers/spi/amba-pl022.c Lucas De Marchi 2011-03-30 829 /* Update total bytes transferred */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 830 msg->actual_length += pl022->cur_transfer->len; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 831 /* Move to next transfer */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 832 msg->state = next_transfer(pl022); c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 833 if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change) c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 834 pl022_cs_control(pl022, SSP_CHIP_DESELECT); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 835 tasklet_schedule(&pl022->pump_transfers); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 836 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 837 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 838 static void setup_dma_scatter(struct pl022 *pl022, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 839 void *buffer, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 840 unsigned int length, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 841 struct sg_table *sgtab) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 842 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 843 struct scatterlist *sg; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 844 int bytesleft = length; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 845 void *bufp = buffer; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 846 int mapbytes; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 847 int i; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 848 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 849 if (buffer) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 850 for_each_sg(sgtab->sgl, sg, sgtab->nents, i) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 851 /* b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 852 * If there are less bytes left than what fits b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 853 * in the current page (plus page alignment offset) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 854 * we just feed in this, else we stuff in as much b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 855 * as we can. b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 856 */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 857 if (bytesleft < (PAGE_SIZE - offset_in_page(bufp))) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 858 mapbytes = bytesleft; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 859 else b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 860 mapbytes = PAGE_SIZE - offset_in_page(bufp); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 861 sg_set_page(sg, virt_to_page(bufp), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 862 mapbytes, offset_in_page(bufp)); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 863 bufp += mapbytes; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 864 bytesleft -= mapbytes; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 865 dev_dbg(&pl022->adev->dev, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 866 "set RX/TX target page @ %p, %d bytes, %d left\n", b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 867 bufp, mapbytes, bytesleft); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 868 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 869 } else { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 870 /* Map the dummy buffer on every page */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 871 for_each_sg(sgtab->sgl, sg, sgtab->nents, i) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 872 if (bytesleft < PAGE_SIZE) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 873 mapbytes = bytesleft; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 874 else b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 875 mapbytes = PAGE_SIZE; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 876 sg_set_page(sg, virt_to_page(pl022->dummypage), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 877 mapbytes, 0); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 878 bytesleft -= mapbytes; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 879 dev_dbg(&pl022->adev->dev, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 880 "set RX/TX to dummy page %d bytes, %d left\n", b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 881 mapbytes, bytesleft); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 882 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 883 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 884 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 885 BUG_ON(bytesleft); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 886 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 887 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 888 /** b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 889 * configure_dma - configures the channels for the next transfer b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 890 * @pl022: SSP driver's private data structure b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 891 */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 892 static int configure_dma(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 893 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 894 struct dma_slave_config rx_conf = { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 895 .src_addr = SSP_DR(pl022->phybase), a485df4b4404379 drivers/spi/spi-pl022.c Vinod Koul 2011-10-14 896 .direction = DMA_DEV_TO_MEM, 258aea76f552cc7 drivers/spi/spi-pl022.c Viresh Kumar 2012-02-01 897 .device_fc = false, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 898 }; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 899 struct dma_slave_config tx_conf = { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 900 .dst_addr = SSP_DR(pl022->phybase), a485df4b4404379 drivers/spi/spi-pl022.c Vinod Koul 2011-10-14 901 .direction = DMA_MEM_TO_DEV, 258aea76f552cc7 drivers/spi/spi-pl022.c Viresh Kumar 2012-02-01 902 .device_fc = false, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 903 }; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 904 unsigned int pages; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 905 int ret; 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 906 int rx_sglen, tx_sglen; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 907 struct dma_chan *rxchan = pl022->dma_rx_channel; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 908 struct dma_chan *txchan = pl022->dma_tx_channel; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 909 struct dma_async_tx_descriptor *rxdesc; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 910 struct dma_async_tx_descriptor *txdesc; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 911 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 912 /* Check that the channels are available */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 913 if (!rxchan || !txchan) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 914 return -ENODEV; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 915 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 916 /* 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 917 * If supplied, the DMA burstsize should equal the FIFO trigger level. 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 918 * Notice that the DMA engine uses one-to-one mapping. Since we can 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 919 * not trigger on 2 elements this needs explicit mapping rather than 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 920 * calculation. 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 921 */ 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 922 switch (pl022->rx_lev_trig) { 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 923 case SSP_RX_1_OR_MORE_ELEM: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 924 rx_conf.src_maxburst = 1; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 925 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 926 case SSP_RX_4_OR_MORE_ELEM: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 927 rx_conf.src_maxburst = 4; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 928 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 929 case SSP_RX_8_OR_MORE_ELEM: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 930 rx_conf.src_maxburst = 8; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 931 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 932 case SSP_RX_16_OR_MORE_ELEM: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 933 rx_conf.src_maxburst = 16; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 934 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 935 case SSP_RX_32_OR_MORE_ELEM: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 936 rx_conf.src_maxburst = 32; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 937 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 938 default: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 939 rx_conf.src_maxburst = pl022->vendor->fifodepth >> 1; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 940 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 941 } 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 942 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 943 switch (pl022->tx_lev_trig) { 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 944 case SSP_TX_1_OR_MORE_EMPTY_LOC: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 945 tx_conf.dst_maxburst = 1; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 946 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 947 case SSP_TX_4_OR_MORE_EMPTY_LOC: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 948 tx_conf.dst_maxburst = 4; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 949 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 950 case SSP_TX_8_OR_MORE_EMPTY_LOC: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 951 tx_conf.dst_maxburst = 8; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 952 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 953 case SSP_TX_16_OR_MORE_EMPTY_LOC: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 954 tx_conf.dst_maxburst = 16; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 955 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 956 case SSP_TX_32_OR_MORE_EMPTY_LOC: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 957 tx_conf.dst_maxburst = 32; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 958 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 959 default: 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 960 tx_conf.dst_maxburst = pl022->vendor->fifodepth >> 1; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 961 break; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 962 } 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 963 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 964 switch (pl022->read) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 965 case READING_NULL: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 966 /* Use the same as for writing */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 967 rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_UNDEFINED; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 968 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 969 case READING_U8: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 970 rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 971 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 972 case READING_U16: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 973 rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 974 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 975 case READING_U32: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 976 rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 977 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 978 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 979 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 980 switch (pl022->write) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 981 case WRITING_NULL: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 982 /* Use the same as for reading */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 983 tx_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_UNDEFINED; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 984 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 985 case WRITING_U8: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 986 tx_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 987 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 988 case WRITING_U16: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 989 tx_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 990 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 991 case WRITING_U32: bc3f67a3e1b2075 drivers/spi/amba-pl022.c Joe Perches 2010-11-14 992 tx_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 993 break; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 994 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 995 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 996 /* SPI pecularity: we need to read and write the same width */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 997 if (rx_conf.src_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 998 rx_conf.src_addr_width = tx_conf.dst_addr_width; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 999 if (tx_conf.dst_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1000 tx_conf.dst_addr_width = rx_conf.src_addr_width; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1001 BUG_ON(rx_conf.src_addr_width != tx_conf.dst_addr_width); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1002 ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1003 dmaengine_slave_config(rxchan, &rx_conf); ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1004 dmaengine_slave_config(txchan, &tx_conf); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1005 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1006 /* Create sglists for the transfers */ b181565ee6a0f89 drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1007 pages = DIV_ROUND_UP(pl022->cur_transfer->len, PAGE_SIZE); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1008 dev_dbg(&pl022->adev->dev, "using %d pages for transfer\n", pages); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1009 538a18dc189ef5d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1010 ret = sg_alloc_table(&pl022->sgt_rx, pages, GFP_ATOMIC); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1011 if (ret) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1012 goto err_alloc_rx_sg; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1013 538a18dc189ef5d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1014 ret = sg_alloc_table(&pl022->sgt_tx, pages, GFP_ATOMIC); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1015 if (ret) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1016 goto err_alloc_tx_sg; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1017 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1018 /* Fill in the scatterlists for the RX+TX buffers */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1019 setup_dma_scatter(pl022, pl022->rx, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1020 pl022->cur_transfer->len, &pl022->sgt_rx); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1021 setup_dma_scatter(pl022, pl022->tx, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1022 pl022->cur_transfer->len, &pl022->sgt_tx); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1023 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1024 /* Map DMA buffers */ 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1025 rx_sglen = dma_map_sg(rxchan->device->dev, pl022->sgt_rx.sgl, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1026 pl022->sgt_rx.nents, DMA_FROM_DEVICE); 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1027 if (!rx_sglen) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1028 goto err_rx_sgmap; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1029 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1030 tx_sglen = dma_map_sg(txchan->device->dev, pl022->sgt_tx.sgl, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1031 pl022->sgt_tx.nents, DMA_TO_DEVICE); 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1032 if (!tx_sglen) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1033 goto err_tx_sgmap; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1034 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1035 /* Send both scatterlists */ 16052827d98fbc1 drivers/spi/spi-pl022.c Alexandre Bounine 2012-03-08 1036 rxdesc = dmaengine_prep_slave_sg(rxchan, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1037 pl022->sgt_rx.sgl, 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1038 rx_sglen, a485df4b4404379 drivers/spi/spi-pl022.c Vinod Koul 2011-10-14 1039 DMA_DEV_TO_MEM, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1040 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1041 if (!rxdesc) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1042 goto err_rxdesc; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1043 16052827d98fbc1 drivers/spi/spi-pl022.c Alexandre Bounine 2012-03-08 1044 txdesc = dmaengine_prep_slave_sg(txchan, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1045 pl022->sgt_tx.sgl, 082086f2ce53c69 drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1046 tx_sglen, a485df4b4404379 drivers/spi/spi-pl022.c Vinod Koul 2011-10-14 1047 DMA_MEM_TO_DEV, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1048 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1049 if (!txdesc) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1050 goto err_txdesc; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1051 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1052 /* Put the callback on the RX transfer only, that should finish last */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1053 rxdesc->callback = dma_callback; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1054 rxdesc->callback_param = pl022; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1055 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1056 /* Submit and fire RX and TX with TX last so we're ready to read! */ ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1057 dmaengine_submit(rxdesc); ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1058 dmaengine_submit(txdesc); ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1059 dma_async_issue_pending(rxchan); ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1060 dma_async_issue_pending(txchan); ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1061 pl022->dma_running = true; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1062 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1063 return 0; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1064 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1065 err_txdesc: ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1066 dmaengine_terminate_all(txchan); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1067 err_rxdesc: ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1068 dmaengine_terminate_all(rxchan); b729889686afb7d drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1069 dma_unmap_sg(txchan->device->dev, pl022->sgt_tx.sgl, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1070 pl022->sgt_tx.nents, DMA_TO_DEVICE); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1071 err_tx_sgmap: b729889686afb7d drivers/spi/amba-pl022.c Linus Walleij 2010-12-22 1072 dma_unmap_sg(rxchan->device->dev, pl022->sgt_rx.sgl, 3ffa6158f002e09 drivers/spi/spi-pl022.c Ray Jui 2014-10-09 1073 pl022->sgt_rx.nents, DMA_FROM_DEVICE); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1074 err_rx_sgmap: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1075 sg_free_table(&pl022->sgt_tx); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1076 err_alloc_tx_sg: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1077 sg_free_table(&pl022->sgt_rx); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1078 err_alloc_rx_sg: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1079 return -ENOMEM; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1080 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1081 fd4a319bc933ae9 drivers/spi/spi-pl022.c Grant Likely 2012-12-07 1082 static int pl022_dma_probe(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1083 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1084 dma_cap_mask_t mask; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1085 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1086 /* Try to acquire a generic DMA engine slave channel */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1087 dma_cap_zero(mask); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1088 dma_cap_set(DMA_SLAVE, mask); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1089 /* b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1090 * We need both RX and TX channels to do DMA, else do none b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1091 * of them. b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1092 */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1093 pl022->dma_rx_channel = dma_request_channel(mask, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1094 pl022->master_info->dma_filter, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1095 pl022->master_info->dma_rx_param); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1096 if (!pl022->dma_rx_channel) { 43c640157d4366a drivers/spi/amba-pl022.c Viresh Kumar 2011-05-16 1097 dev_dbg(&pl022->adev->dev, "no RX DMA channel!\n"); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1098 goto err_no_rxchan; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1099 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1100 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1101 pl022->dma_tx_channel = dma_request_channel(mask, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1102 pl022->master_info->dma_filter, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1103 pl022->master_info->dma_tx_param); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1104 if (!pl022->dma_tx_channel) { 43c640157d4366a drivers/spi/amba-pl022.c Viresh Kumar 2011-05-16 1105 dev_dbg(&pl022->adev->dev, "no TX DMA channel!\n"); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1106 goto err_no_txchan; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1107 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1108 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1109 pl022->dummypage = kmalloc(PAGE_SIZE, GFP_KERNEL); 77538f4a98dc542 drivers/spi/spi-pl022.c Jingoo Han 2014-04-29 1110 if (!pl022->dummypage) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1111 goto err_no_dummypage; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1112 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1113 dev_info(&pl022->adev->dev, "setup for DMA on RX %s, TX %s\n", b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1114 dma_chan_name(pl022->dma_rx_channel), b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1115 dma_chan_name(pl022->dma_tx_channel)); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1116 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1117 return 0; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1118 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1119 err_no_dummypage: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1120 dma_release_channel(pl022->dma_tx_channel); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1121 err_no_txchan: b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1122 dma_release_channel(pl022->dma_rx_channel); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1123 pl022->dma_rx_channel = NULL; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1124 err_no_rxchan: 43c640157d4366a drivers/spi/amba-pl022.c Viresh Kumar 2011-05-16 1125 dev_err(&pl022->adev->dev, 43c640157d4366a drivers/spi/amba-pl022.c Viresh Kumar 2011-05-16 1126 "Failed to work in dma mode, work without dma!\n"); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1127 return -ENODEV; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1128 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1129 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1130 static int pl022_dma_autoprobe(struct pl022 *pl022) dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1131 { dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1132 struct device *dev = &pl022->adev->dev; f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1133 struct dma_chan *chan; f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1134 int err; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1135 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1136 /* automatically configure DMA channels from platform, normally using DT */ f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1137 chan = dma_request_slave_channel_reason(dev, "rx"); f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1138 if (IS_ERR(chan)) { f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1139 err = PTR_ERR(chan); dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1140 goto err_no_rxchan; f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1141 } f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1142 f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1143 pl022->dma_rx_channel = chan; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1144 f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1145 chan = dma_request_slave_channel_reason(dev, "tx"); f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1146 if (IS_ERR(chan)) { f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1147 err = PTR_ERR(chan); dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1148 goto err_no_txchan; f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1149 } f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1150 f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1151 pl022->dma_tx_channel = chan; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1152 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1153 pl022->dummypage = kmalloc(PAGE_SIZE, GFP_KERNEL); f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1154 if (!pl022->dummypage) { f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1155 err = -ENOMEM; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1156 goto err_no_dummypage; f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1157 } dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1158 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1159 return 0; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1160 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1161 err_no_dummypage: dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1162 dma_release_channel(pl022->dma_tx_channel); dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1163 pl022->dma_tx_channel = NULL; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1164 err_no_txchan: dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1165 dma_release_channel(pl022->dma_rx_channel); dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1166 pl022->dma_rx_channel = NULL; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1167 err_no_rxchan: f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 1168 return err; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1169 } dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1170 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1171 static void terminate_dma(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1172 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1173 struct dma_chan *rxchan = pl022->dma_rx_channel; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1174 struct dma_chan *txchan = pl022->dma_tx_channel; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1175 ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1176 dmaengine_terminate_all(rxchan); ecd442fd9e388a3 drivers/spi/amba-pl022.c Linus Walleij 2011-02-08 1177 dmaengine_terminate_all(txchan); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1178 unmap_free_dma_scatter(pl022); ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1179 pl022->dma_running = false; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1180 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1181 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1182 static void pl022_dma_remove(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1183 { ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1184 if (pl022->dma_running) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1185 terminate_dma(pl022); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1186 if (pl022->dma_tx_channel) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1187 dma_release_channel(pl022->dma_tx_channel); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1188 if (pl022->dma_rx_channel) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1189 dma_release_channel(pl022->dma_rx_channel); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1190 kfree(pl022->dummypage); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1191 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1192 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1193 #else b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1194 static inline int configure_dma(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1195 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1196 return -ENODEV; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1197 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1198 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1199 static inline int pl022_dma_autoprobe(struct pl022 *pl022) dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1200 { dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1201 return 0; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1202 } dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 1203 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1204 static inline int pl022_dma_probe(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1205 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1206 return 0; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1207 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1208 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1209 static inline void pl022_dma_remove(struct pl022 *pl022) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1210 { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1211 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1212 #endif b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1213 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1214 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1215 * pl022_interrupt_handler - Interrupt handler for SSP controller b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1216 * b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1217 * This function handles interrupts generated for an interrupt based transfer. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1218 * If a receive overrun (ROR) interrupt is there then we disable SSP, flag the b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1219 * current message's state as STATE_ERROR and schedule the tasklet b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1220 * pump_transfers which will do the postprocessing of the current message by b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1221 * calling giveback(). Otherwise it reads data from RX FIFO till there is no b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1222 * more data, and writes data in TX FIFO till it is not full. If we complete b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1223 * the transfer we move to the next transfer and schedule the tasklet. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1224 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1225 static irqreturn_t pl022_interrupt_handler(int irq, void *dev_id) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1226 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1227 struct pl022 *pl022 = dev_id; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1228 struct spi_message *msg = pl022->cur_msg; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1229 u16 irq_status = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1230 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1231 if (unlikely(!msg)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1232 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1233 "bad message state in interrupt handler"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1234 /* Never fail */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1235 return IRQ_HANDLED; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1236 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1237 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1238 /* Read the Interrupt Status Register */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1239 irq_status = readw(SSP_MIS(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1240 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1241 if (unlikely(!irq_status)) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1242 return IRQ_NONE; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1243 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1244 /* b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1245 * This handles the FIFO interrupts, the timeout b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1246 * interrupts are flatly ignored, they cannot be b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1247 * trusted. b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1248 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1249 if (unlikely(irq_status & SSP_MIS_MASK_RORMIS)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1250 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1251 * Overrun interrupt - bail out since our Data has been b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1252 * corrupted b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1253 */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1254 dev_err(&pl022->adev->dev, "FIFO overrun\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1255 if (readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RFF) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1256 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1257 "RXFIFO is full\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1258 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1259 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1260 * Disable and clear interrupts, disable SSP, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1261 * mark message with bad status so it can be b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1262 * retried. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1263 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1264 writew(DISABLE_ALL_INTERRUPTS, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1265 SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1266 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1267 writew((readw(SSP_CR1(pl022->virtbase)) & b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1268 (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1269 msg->state = STATE_ERROR; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1270 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1271 /* Schedule message queue handler */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1272 tasklet_schedule(&pl022->pump_transfers); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1273 return IRQ_HANDLED; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1274 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1275 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1276 readwriter(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1277 7183d1ebda477c4 drivers/spi/spi-pl022.c Alexander Sverdlin 2015-02-27 1278 if (pl022->tx == pl022->tx_end) { 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1279 /* Disable Transmit interrupt, enable receive interrupt */ 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1280 writew((readw(SSP_IMSC(pl022->virtbase)) & 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1281 ~SSP_IMSC_MASK_TXIM) | SSP_IMSC_MASK_RXIM, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1282 SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1283 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1284 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1285 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1286 * Since all transactions must write as much as shall be read, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1287 * we can conclude the entire transaction once RX is complete. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1288 * At this point, all TX will always be finished. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1289 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1290 if (pl022->rx >= pl022->rx_end) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1291 writew(DISABLE_ALL_INTERRUPTS, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1292 SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1293 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1294 if (unlikely(pl022->rx > pl022->rx_end)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1295 dev_warn(&pl022->adev->dev, "read %u surplus " b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1296 "bytes (did you request an odd " b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1297 "number of bytes on a 16bit bus?)\n", b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1298 (u32) (pl022->rx - pl022->rx_end)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1299 } 25985edcedea639 drivers/spi/amba-pl022.c Lucas De Marchi 2011-03-30 1300 /* Update total bytes transferred */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1301 msg->actual_length += pl022->cur_transfer->len; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1302 /* Move to next transfer */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1303 msg->state = next_transfer(pl022); c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 1304 if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change) c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 1305 pl022_cs_control(pl022, SSP_CHIP_DESELECT); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1306 tasklet_schedule(&pl022->pump_transfers); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1307 return IRQ_HANDLED; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1308 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1309 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1310 return IRQ_HANDLED; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1311 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1312 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1313 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1314 * This sets up the pointers to memory for the next message to b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1315 * send out on the SPI bus. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1316 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1317 static int set_up_next_transfer(struct pl022 *pl022, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1318 struct spi_transfer *transfer) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1319 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1320 int residue; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1321 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1322 /* Sanity check the message for this bus width */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1323 residue = pl022->cur_transfer->len % pl022->cur_chip->n_bytes; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1324 if (unlikely(residue != 0)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1325 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1326 "message of %u bytes to transmit but the current " b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1327 "chip bus has a data width of %u bytes!\n", b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1328 pl022->cur_transfer->len, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1329 pl022->cur_chip->n_bytes); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1330 dev_err(&pl022->adev->dev, "skipping this message\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1331 return -EIO; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1332 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1333 pl022->tx = (void *)transfer->tx_buf; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1334 pl022->tx_end = pl022->tx + pl022->cur_transfer->len; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1335 pl022->rx = (void *)transfer->rx_buf; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1336 pl022->rx_end = pl022->rx + pl022->cur_transfer->len; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1337 pl022->write = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1338 pl022->tx ? pl022->cur_chip->write : WRITING_NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1339 pl022->read = pl022->rx ? pl022->cur_chip->read : READING_NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1340 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1341 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1342 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1343 /** b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1344 * pump_transfers - Tasklet function which schedules next transfer b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1345 * when running in interrupt or DMA transfer mode. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1346 * @data: SSP driver private data structure b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1347 * b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1348 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1349 static void pump_transfers(unsigned long data) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1350 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1351 struct pl022 *pl022 = (struct pl022 *) data; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1352 struct spi_message *message = NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1353 struct spi_transfer *transfer = NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1354 struct spi_transfer *previous = NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1355 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1356 /* Get current state information */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1357 message = pl022->cur_msg; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1358 transfer = pl022->cur_transfer; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1359 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1360 /* Handle for abort */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1361 if (message->state == STATE_ERROR) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1362 message->status = -EIO; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1363 giveback(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1364 return; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1365 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1366 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1367 /* Handle end of message */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1368 if (message->state == STATE_DONE) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1369 message->status = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1370 giveback(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1371 return; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1372 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1373 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1374 /* Delay if requested at end of transfer before CS change */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1375 if (message->state == STATE_RUNNING) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1376 previous = list_entry(transfer->transfer_list.prev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1377 struct spi_transfer, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1378 transfer_list); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1379 if (previous->delay_usecs) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1380 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1381 * FIXME: This runs in interrupt context. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1382 * Is this really smart? b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1383 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1384 udelay(previous->delay_usecs); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1385 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 1386 /* Reselect chip select only if cs_change was requested */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1387 if (previous->cs_change) f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1388 pl022_cs_control(pl022, SSP_CHIP_SELECT); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1389 } else { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1390 /* STATE_START */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1391 message->state = STATE_RUNNING; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1392 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1393 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1394 if (set_up_next_transfer(pl022, transfer)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1395 message->state = STATE_ERROR; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1396 message->status = -EIO; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1397 giveback(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1398 return; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1399 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1400 /* Flush the FIFOs and let's go! */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1401 flush(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1402 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1403 if (pl022->cur_chip->enable_dma) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1404 if (configure_dma(pl022)) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1405 dev_dbg(&pl022->adev->dev, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1406 "configuration of DMA failed, fall back to interrupt mode\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1407 goto err_config_dma; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1408 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1409 return; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1410 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1411 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1412 err_config_dma: 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1413 /* enable all interrupts except RX */ 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1414 writew(ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM, SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1415 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1416 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1417 static void do_interrupt_dma_transfer(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1418 { 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1419 /* 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1420 * Default is to enable all interrupts except RX - 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1421 * this will be enabled once TX is complete 172289df4004ccc drivers/spi/spi-pl022.c Chris Blair 2011-06-04 1422 */ d555ea05f9d8ebf drivers/spi/spi-pl022.c Mark Brown 2014-08-01 1423 u32 irqflags = (u32)(ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1424 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 1425 /* Enable target chip, if not already active */ 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 1426 if (!pl022->next_msg_cs_active) f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1427 pl022_cs_control(pl022, SSP_CHIP_SELECT); 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 1428 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1429 if (set_up_next_transfer(pl022, pl022->cur_transfer)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1430 /* Error path */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1431 pl022->cur_msg->state = STATE_ERROR; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1432 pl022->cur_msg->status = -EIO; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1433 giveback(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1434 return; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1435 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1436 /* If we're using DMA, set up DMA here */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1437 if (pl022->cur_chip->enable_dma) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1438 /* Configure DMA transfer */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1439 if (configure_dma(pl022)) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1440 dev_dbg(&pl022->adev->dev, b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1441 "configuration of DMA failed, fall back to interrupt mode\n"); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1442 goto err_config_dma; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1443 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1444 /* Disable interrupts in DMA mode, IRQ from DMA controller */ b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1445 irqflags = DISABLE_ALL_INTERRUPTS; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1446 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1447 err_config_dma: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1448 /* Enable SSP, turn on interrupts */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1449 writew((readw(SSP_CR1(pl022->virtbase)) | SSP_CR1_MASK_SSE), b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1450 SSP_CR1(pl022->virtbase)); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1451 writew(irqflags, SSP_IMSC(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1452 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1453 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1454 static void print_current_status(struct pl022 *pl022) 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1455 { 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1456 u32 read_cr0; 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1457 u16 read_cr1, read_dmacr, read_sr; 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1458 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1459 if (pl022->vendor->extended_cr) 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1460 read_cr0 = readl(SSP_CR0(pl022->virtbase)); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1461 else 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1462 read_cr0 = readw(SSP_CR0(pl022->virtbase)); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1463 read_cr1 = readw(SSP_CR1(pl022->virtbase)); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1464 read_dmacr = readw(SSP_DMACR(pl022->virtbase)); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1465 read_sr = readw(SSP_SR(pl022->virtbase)); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1466 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1467 dev_warn(&pl022->adev->dev, "spi-pl022 CR0: %x\n", read_cr0); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1468 dev_warn(&pl022->adev->dev, "spi-pl022 CR1: %x\n", read_cr1); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1469 dev_warn(&pl022->adev->dev, "spi-pl022 DMACR: %x\n", read_dmacr); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1470 dev_warn(&pl022->adev->dev, "spi-pl022 SR: %x\n", read_sr); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1471 dev_warn(&pl022->adev->dev, 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1472 "spi-pl022 exp_fifo_level/fifodepth: %u/%d\n", 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1473 pl022->exp_fifo_level, 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1474 pl022->vendor->fifodepth); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1475 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1476 } 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1477 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1478 static void do_polling_transfer(struct pl022 *pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1479 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1480 struct spi_message *message = NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1481 struct spi_transfer *transfer = NULL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1482 struct spi_transfer *previous = NULL; a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1483 unsigned long time, timeout; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1484 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1485 message = pl022->cur_msg; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1486 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1487 while (message->state != STATE_DONE) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1488 /* Handle for abort */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1489 if (message->state == STATE_ERROR) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1490 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1491 transfer = pl022->cur_transfer; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1492 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1493 /* Delay if requested at end of transfer */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1494 if (message->state == STATE_RUNNING) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1495 previous = b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1496 list_entry(transfer->transfer_list.prev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1497 struct spi_transfer, transfer_list); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1498 if (previous->delay_usecs) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1499 udelay(previous->delay_usecs); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1500 if (previous->cs_change) f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1501 pl022_cs_control(pl022, SSP_CHIP_SELECT); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1502 } else { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1503 /* STATE_START */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1504 message->state = STATE_RUNNING; 8b8d719161c3866 drivers/spi/spi-pl022.c Virupax Sadashivpetimath 2011-11-10 1505 if (!pl022->next_msg_cs_active) f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1506 pl022_cs_control(pl022, SSP_CHIP_SELECT); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1507 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1508 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1509 /* Configuration Changing Per Transfer */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1510 if (set_up_next_transfer(pl022, transfer)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1511 /* Error path */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1512 message->state = STATE_ERROR; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1513 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1514 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1515 /* Flush FIFOs and enable SSP */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1516 flush(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1517 writew((readw(SSP_CR1(pl022->virtbase)) | SSP_CR1_MASK_SSE), b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1518 SSP_CR1(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1519 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1520 dev_dbg(&pl022->adev->dev, "polling transfer ongoing ...\n"); a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1521 a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1522 timeout = jiffies + msecs_to_jiffies(SPI_POLLING_TIMEOUT); a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1523 while (pl022->tx < pl022->tx_end || pl022->rx < pl022->rx_end) { a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1524 time = jiffies; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1525 readwriter(pl022); a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1526 if (time_after(time, timeout)) { a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1527 dev_warn(&pl022->adev->dev, a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1528 "%s: timeout!\n", __func__); 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1529 message->state = STATE_TIMEOUT; 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1530 print_current_status(pl022); a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1531 goto out; a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1532 } 521999bd4a8c47a drivers/spi/amba-pl022.c Linus Walleij 2011-05-19 1533 cpu_relax(); a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1534 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1535 25985edcedea639 drivers/spi/amba-pl022.c Lucas De Marchi 2011-03-30 1536 /* Update total byte transferred */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1537 message->actual_length += pl022->cur_transfer->len; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1538 /* Move to next transfer */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1539 message->state = next_transfer(pl022); c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 1540 if (message->state != STATE_DONE c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 1541 && pl022->cur_transfer->cs_change) c0b07605f1a0285 drivers/spi/spi-pl022.c Fredrik Ternerot 2018-11-13 1542 pl022_cs_control(pl022, SSP_CHIP_DESELECT); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1543 } a18c266f8e43004 drivers/spi/amba-pl022.c Magnus Templing 2011-05-19 1544 out: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1545 /* Handle end of message */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1546 if (message->state == STATE_DONE) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1547 message->status = 0; 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1548 else if (message->state == STATE_TIMEOUT) 7aef2b646b24247 drivers/spi/spi-pl022.c Jiwei Sun 2019-01-18 1549 message->status = -EAGAIN; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1550 else b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1551 message->status = -EIO; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1552 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1553 giveback(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1554 return; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1555 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1556 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1557 static int pl022_transfer_one_message(struct spi_master *master, ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1558 struct spi_message *msg) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1559 { ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1560 struct pl022 *pl022 = spi_master_get_devdata(master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1561 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1562 /* Initial message state */ ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1563 pl022->cur_msg = msg; ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1564 msg->state = STATE_START; ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1565 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1566 pl022->cur_transfer = list_entry(msg->transfers.next, f1e45f86ed93b9e drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1567 struct spi_transfer, transfer_list); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1568 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1569 /* Setup the SPI using the per chip configuration */ ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1570 pl022->cur_chip = spi_get_ctldata(msg->spi); f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1571 pl022->cur_cs = pl022->chipselects[msg->spi->chip_select]; d4b6af2e0e29278 drivers/spi/spi-pl022.c Chris Blair 2011-11-04 1572 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1573 restore_state(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1574 flush(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1575 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1576 if (pl022->cur_chip->xfer_type == POLLING_TRANSFER) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1577 do_polling_transfer(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1578 else b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1579 do_interrupt_dma_transfer(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1580 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1581 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1582 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1583 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1584 static int pl022_unprepare_transfer_hardware(struct spi_master *master) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1585 { ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1586 struct pl022 *pl022 = spi_master_get_devdata(master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1587 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1588 /* nothing more to do - disable spi/ssp and power off */ ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1589 writew((readw(SSP_CR1(pl022->virtbase)) & ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 1590 (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1591 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1592 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1593 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1594 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1595 static int verify_controller_parameters(struct pl022 *pl022, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1596 struct pl022_config_chip const *chip_info) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1597 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1598 if ((chip_info->iface < SSP_INTERFACE_MOTOROLA_SPI) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1599 || (chip_info->iface > SSP_INTERFACE_UNIDIRECTIONAL)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1600 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1601 "interface is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1602 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1603 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1604 if ((chip_info->iface == SSP_INTERFACE_UNIDIRECTIONAL) && b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1605 (!pl022->vendor->unidir)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1606 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1607 "unidirectional mode not supported in this " b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1608 "hardware version\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1609 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1610 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1611 if ((chip_info->hierarchy != SSP_MASTER) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1612 && (chip_info->hierarchy != SSP_SLAVE)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1613 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1614 "hierarchy is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1615 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1616 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1617 if ((chip_info->com_mode != INTERRUPT_TRANSFER) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1618 && (chip_info->com_mode != DMA_TRANSFER) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1619 && (chip_info->com_mode != POLLING_TRANSFER)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1620 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1621 "Communication mode is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1622 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1623 } 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1624 switch (chip_info->rx_lev_trig) { 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1625 case SSP_RX_1_OR_MORE_ELEM: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1626 case SSP_RX_4_OR_MORE_ELEM: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1627 case SSP_RX_8_OR_MORE_ELEM: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1628 /* These are always OK, all variants can handle this */ 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1629 break; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1630 case SSP_RX_16_OR_MORE_ELEM: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1631 if (pl022->vendor->fifodepth < 16) { 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1632 dev_err(&pl022->adev->dev, 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1633 "RX FIFO Trigger Level is configured incorrectly\n"); 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1634 return -EINVAL; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1635 } 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1636 break; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1637 case SSP_RX_32_OR_MORE_ELEM: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1638 if (pl022->vendor->fifodepth < 32) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1639 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1640 "RX FIFO Trigger Level is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1641 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1642 } 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1643 break; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1644 default: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1645 dev_err(&pl022->adev->dev, 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1646 "RX FIFO Trigger Level is configured incorrectly\n"); 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1647 return -EINVAL; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1648 } 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1649 switch (chip_info->tx_lev_trig) { 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1650 case SSP_TX_1_OR_MORE_EMPTY_LOC: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1651 case SSP_TX_4_OR_MORE_EMPTY_LOC: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1652 case SSP_TX_8_OR_MORE_EMPTY_LOC: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1653 /* These are always OK, all variants can handle this */ 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1654 break; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1655 case SSP_TX_16_OR_MORE_EMPTY_LOC: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1656 if (pl022->vendor->fifodepth < 16) { 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1657 dev_err(&pl022->adev->dev, 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1658 "TX FIFO Trigger Level is configured incorrectly\n"); 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1659 return -EINVAL; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1660 } 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1661 break; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1662 case SSP_TX_32_OR_MORE_EMPTY_LOC: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1663 if (pl022->vendor->fifodepth < 32) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1664 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1665 "TX FIFO Trigger Level is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1666 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1667 } 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1668 break; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1669 default: 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1670 dev_err(&pl022->adev->dev, 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1671 "TX FIFO Trigger Level is configured incorrectly\n"); 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1672 return -EINVAL; 78b2b911bf70203 drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1673 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1674 if (chip_info->iface == SSP_INTERFACE_NATIONAL_MICROWIRE) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1675 if ((chip_info->ctrl_len < SSP_BITS_4) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1676 || (chip_info->ctrl_len > SSP_BITS_32)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1677 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1678 "CTRL LEN is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1679 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1680 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1681 if ((chip_info->wait_state != SSP_MWIRE_WAIT_ZERO) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1682 && (chip_info->wait_state != SSP_MWIRE_WAIT_ONE)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1683 dev_err(&pl022->adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1684 "Wait State is configured incorrectly\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1685 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1686 } 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1687 /* Half duplex is only available in the ST Micro version */ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1688 if (pl022->vendor->extended_cr) { 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1689 if ((chip_info->duplex != 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1690 SSP_MICROWIRE_CHANNEL_FULL_DUPLEX) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1691 && (chip_info->duplex != 4a4fd47155ac49b drivers/spi/amba-pl022.c Julia Lawall 2010-09-29 1692 SSP_MICROWIRE_CHANNEL_HALF_DUPLEX)) { 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1693 dev_err(&pl022->adev->dev, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1694 "Microwire duplex mode is configured incorrectly\n"); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1695 return -EINVAL; 4a4fd47155ac49b drivers/spi/amba-pl022.c Julia Lawall 2010-09-29 1696 } 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1697 } else { 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1698 if (chip_info->duplex != SSP_MICROWIRE_CHANNEL_FULL_DUPLEX) 5a1c98be1de165c drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1699 dev_err(&pl022->adev->dev, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1700 "Microwire half duplex mode requested," 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1701 " but this is only available in the" 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1702 " ST version of PL022\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1703 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1704 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1705 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1706 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1707 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1708 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1709 static inline u32 spi_rate(u32 rate, u16 cpsdvsr, u16 scr) 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1710 { 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1711 return rate / (cpsdvsr * (1 + scr)); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1712 } 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1713 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1714 static int calculate_effective_freq(struct pl022 *pl022, int freq, struct 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1715 ssp_clock_params * clk_freq) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1716 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1717 /* Lets calculate the frequency parameters */ 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1718 u16 cpsdvsr = CPSDVR_MIN, scr = SCR_MIN; 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1719 u32 rate, max_tclk, min_tclk, best_freq = 0, best_cpsdvsr = 0, 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1720 best_scr = 0, tmp, found = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1721 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1722 rate = clk_get_rate(pl022->clk); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1723 /* cpsdvscr = 2 & scr 0 */ 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1724 max_tclk = spi_rate(rate, CPSDVR_MIN, SCR_MIN); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1725 /* cpsdvsr = 254 & scr = 255 */ 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1726 min_tclk = spi_rate(rate, CPSDVR_MAX, SCR_MAX); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1727 ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1728 if (freq > max_tclk) ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1729 dev_warn(&pl022->adev->dev, ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1730 "Max speed that can be programmed is %d Hz, you requested %d\n", ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1731 max_tclk, freq); ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1732 ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1733 if (freq < min_tclk) { 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1734 dev_err(&pl022->adev->dev, ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1735 "Requested frequency: %d Hz is less than minimum possible %d Hz\n", ea505bc99f77f3f drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1736 freq, min_tclk); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1737 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1738 } 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1739 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1740 /* 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1741 * best_freq will give closest possible available rate (<= requested 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1742 * freq) for all values of scr & cpsdvsr. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1743 */ 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1744 while ((cpsdvsr <= CPSDVR_MAX) && !found) { 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1745 while (scr <= SCR_MAX) { 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1746 tmp = spi_rate(rate, cpsdvsr, scr); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1747 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1748 if (tmp > freq) { 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1749 /* we need lower freq */ 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1750 scr++; 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1751 continue; 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1752 } 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1753 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1754 /* 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1755 * If found exact value, mark found and break. 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1756 * If found more closer value, update and break. 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1757 */ 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1758 if (tmp > best_freq) { 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1759 best_freq = tmp; 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1760 best_cpsdvsr = cpsdvsr; 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1761 best_scr = scr; 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1762 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1763 if (tmp == freq) 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1764 found = 1; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1765 } 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1766 /* 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1767 * increased scr will give lower rates, which are not 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1768 * required 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1769 */ 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1770 break; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1771 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1772 cpsdvsr += 2; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1773 scr = SCR_MIN; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1774 } 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1775 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1776 WARN(!best_freq, "pl022: Matching cpsdvsr and scr not found for %d Hz rate \n", 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1777 freq); 5eb806a3a68920a drivers/spi/spi-pl022.c Viresh Kumar 2012-04-19 1778 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1779 clk_freq->cpsdvsr = (u8) (best_cpsdvsr & 0xFF); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1780 clk_freq->scr = (u8) (best_scr & 0xFF); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1781 dev_dbg(&pl022->adev->dev, 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1782 "SSP Target Frequency is: %u, Effective Frequency is %u\n", 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1783 freq, best_freq); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1784 dev_dbg(&pl022->adev->dev, "SSP cpsdvsr = %d, scr = %d\n", b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1785 clk_freq->cpsdvsr, clk_freq->scr); 0379b2a33a8a03d drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 1786 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1787 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1788 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1789 f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1790 /* f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1791 * A piece of default chip info unless the platform f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1792 * supplies it. f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1793 */ f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1794 static const struct pl022_config_chip pl022_default_chip_info = { f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1795 .com_mode = POLLING_TRANSFER, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1796 .iface = SSP_INTERFACE_MOTOROLA_SPI, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1797 .hierarchy = SSP_SLAVE, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1798 .slave_tx_disable = DO_NOT_DRIVE_TX, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1799 .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1800 .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1801 .ctrl_len = SSP_BITS_8, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1802 .wait_state = SSP_MWIRE_WAIT_ZERO, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1803 .duplex = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1804 }; f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1805 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1806 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1807 * pl022_setup - setup function registered to SPI master framework b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1808 * @spi: spi device which is requesting setup b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1809 * b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1810 * This function is registered to the SPI framework for this SPI master b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1811 * controller. If it is the first time when setup is called by this device, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1812 * this function will initialize the runtime state for this chip and save b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1813 * the same in the device structure. Else it will update the runtime info b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1814 * with the updated chip info. Nothing is really being written to the b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1815 * controller hardware here, that is not done until the actual transfer b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1816 * commence. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1817 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1818 static int pl022_setup(struct spi_device *spi) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1819 { f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1820 struct pl022_config_chip const *chip_info; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1821 struct pl022_config_chip chip_info_dt; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1822 struct chip_data *chip; c4a4784308f5cb8 drivers/spi/spi-pl022.c Jonas Aaberg 2011-02-28 1823 struct ssp_clock_params clk_freq = { .cpsdvsr = 0, .scr = 0}; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1824 int status = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1825 struct pl022 *pl022 = spi_master_get_devdata(spi->master); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1826 unsigned int bits = spi->bits_per_word; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1827 u32 tmp; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1828 struct device_node *np = spi->dev.of_node; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1829 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1830 if (!spi->max_speed_hz) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1831 return -EINVAL; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1832 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1833 /* Get controller_state if one is supplied */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1834 chip = spi_get_ctldata(spi); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1835 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1836 if (chip == NULL) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1837 chip = kzalloc(sizeof(struct chip_data), GFP_KERNEL); 77538f4a98dc542 drivers/spi/spi-pl022.c Jingoo Han 2014-04-29 1838 if (!chip) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1839 return -ENOMEM; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1840 dev_dbg(&spi->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1841 "allocated memory for controller's runtime state\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1842 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1843 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1844 /* Get controller data if one is supplied */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1845 chip_info = spi->controller_data; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1846 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1847 if (chip_info == NULL) { 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1848 if (np) { 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1849 chip_info_dt = pl022_default_chip_info; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1850 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1851 chip_info_dt.hierarchy = SSP_MASTER; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1852 of_property_read_u32(np, "pl022,interface", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1853 &chip_info_dt.iface); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1854 of_property_read_u32(np, "pl022,com-mode", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1855 &chip_info_dt.com_mode); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1856 of_property_read_u32(np, "pl022,rx-level-trig", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1857 &chip_info_dt.rx_lev_trig); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1858 of_property_read_u32(np, "pl022,tx-level-trig", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1859 &chip_info_dt.tx_lev_trig); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1860 of_property_read_u32(np, "pl022,ctrl-len", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1861 &chip_info_dt.ctrl_len); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1862 of_property_read_u32(np, "pl022,wait-state", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1863 &chip_info_dt.wait_state); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1864 of_property_read_u32(np, "pl022,duplex", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1865 &chip_info_dt.duplex); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1866 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1867 chip_info = &chip_info_dt; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1868 } else { f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1869 chip_info = &pl022_default_chip_info; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1870 /* spi_board_info.controller_data not is supplied */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1871 dev_dbg(&spi->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1872 "using default controller_data settings\n"); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1873 } f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1874 } else b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1875 dev_dbg(&spi->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1876 "using user supplied controller_data settings\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1877 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1878 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1879 * We can override with custom divisors, else we use the board b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1880 * frequency setting b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1881 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1882 if ((0 == chip_info->clk_freq.cpsdvsr) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1883 && (0 == chip_info->clk_freq.scr)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1884 status = calculate_effective_freq(pl022, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1885 spi->max_speed_hz, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1886 &clk_freq); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1887 if (status < 0) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1888 goto err_config_params; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1889 } else { f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1890 memcpy(&clk_freq, &chip_info->clk_freq, sizeof(clk_freq)); f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1891 if ((clk_freq.cpsdvsr % 2) != 0) f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1892 clk_freq.cpsdvsr = f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1893 clk_freq.cpsdvsr - 1; f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1894 } f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1895 if ((clk_freq.cpsdvsr < CPSDVR_MIN) f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1896 || (clk_freq.cpsdvsr > CPSDVR_MAX)) { e3f88ae99609205 drivers/spi/amba-pl022.c Virupax Sadashivpetimath 2011-06-13 1897 status = -EINVAL; f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1898 dev_err(&spi->dev, f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1899 "cpsdvsr is configured incorrectly\n"); f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1900 goto err_config_params; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1901 } f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1902 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1903 status = verify_controller_parameters(pl022, chip_info); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1904 if (status) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1905 dev_err(&spi->dev, "controller data is incorrect"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1906 goto err_config_params; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1907 } f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1908 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1909 pl022->rx_lev_trig = chip_info->rx_lev_trig; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1910 pl022->tx_lev_trig = chip_info->tx_lev_trig; 083be3f05371b8f drivers/spi/spi-pl022.c Linus Walleij 2011-06-16 1911 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1912 /* Now set controller state based on controller data */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1913 chip->xfer_type = chip_info->com_mode; f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1914 if (!gpio_is_valid(pl022->chipselects[spi->chip_select])) f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1915 dev_warn(&spi->dev, f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 1916 "invalid chip select\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1917 eb798c641a34ae9 drivers/spi/spi-pl022.c Vinit Shenoy 2012-04-17 1918 /* Check bits per word with vendor specific range */ eb798c641a34ae9 drivers/spi/spi-pl022.c Vinit Shenoy 2012-04-17 1919 if ((bits <= 3) || (bits > pl022->vendor->max_bpw)) { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1920 status = -ENOTSUPP; eb798c641a34ae9 drivers/spi/spi-pl022.c Vinit Shenoy 2012-04-17 1921 dev_err(&spi->dev, "illegal data size for this controller!\n"); eb798c641a34ae9 drivers/spi/spi-pl022.c Vinit Shenoy 2012-04-17 1922 dev_err(&spi->dev, "This controller can only handle 4 <= n <= %d bit words\n", eb798c641a34ae9 drivers/spi/spi-pl022.c Vinit Shenoy 2012-04-17 1923 pl022->vendor->max_bpw); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1924 goto err_config_params; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1925 } else if (bits <= 8) { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1926 dev_dbg(&spi->dev, "4 <= n <=8 bits per word\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1927 chip->n_bytes = 1; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1928 chip->read = READING_U8; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1929 chip->write = WRITING_U8; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1930 } else if (bits <= 16) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1931 dev_dbg(&spi->dev, "9 <= n <= 16 bits per word\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1932 chip->n_bytes = 2; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1933 chip->read = READING_U16; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1934 chip->write = WRITING_U16; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1935 } else { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1936 dev_dbg(&spi->dev, "17 <= n <= 32 bits per word\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1937 chip->n_bytes = 4; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1938 chip->read = READING_U32; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1939 chip->write = WRITING_U32; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1940 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1941 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1942 /* Now Initialize all register settings required for this chip */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1943 chip->cr0 = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1944 chip->cr1 = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1945 chip->dmacr = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1946 chip->cpsr = 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1947 if ((chip_info->com_mode == DMA_TRANSFER) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1948 && ((pl022->master_info)->enable_dma)) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1949 chip->enable_dma = true; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1950 dev_dbg(&spi->dev, "DMA mode set in controller state\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1951 SSP_WRITE_BITS(chip->dmacr, SSP_DMA_ENABLED, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1952 SSP_DMACR_MASK_RXDMAE, 0); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1953 SSP_WRITE_BITS(chip->dmacr, SSP_DMA_ENABLED, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1954 SSP_DMACR_MASK_TXDMAE, 1); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1955 } else { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 1956 chip->enable_dma = false; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1957 dev_dbg(&spi->dev, "DMA mode NOT set in controller state\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1958 SSP_WRITE_BITS(chip->dmacr, SSP_DMA_DISABLED, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1959 SSP_DMACR_MASK_RXDMAE, 0); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1960 SSP_WRITE_BITS(chip->dmacr, SSP_DMA_DISABLED, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1961 SSP_DMACR_MASK_TXDMAE, 1); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1962 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1963 f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 1964 chip->cpsr = clk_freq.cpsdvsr; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 1965 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1966 /* Special setup for the ST micro extended control registers */ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1967 if (pl022->vendor->extended_cr) { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1968 u32 etx; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1969 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1970 if (pl022->vendor->pl023) { 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1971 /* These bits are only in the PL023 */ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1972 SSP_WRITE_BITS(chip->cr1, chip_info->clkdelay, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1973 SSP_CR1_MASK_FBCLKDEL_ST, 13); 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1974 } else { 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1975 /* These bits are in the PL022 but not PL023 */ 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1976 SSP_WRITE_BITS(chip->cr0, chip_info->duplex, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1977 SSP_CR0_MASK_HALFDUP_ST, 5); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1978 SSP_WRITE_BITS(chip->cr0, chip_info->ctrl_len, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1979 SSP_CR0_MASK_CSS_ST, 16); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1980 SSP_WRITE_BITS(chip->cr0, chip_info->iface, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1981 SSP_CR0_MASK_FRF_ST, 21); 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1982 SSP_WRITE_BITS(chip->cr1, chip_info->wait_state, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1983 SSP_CR1_MASK_MWAIT_ST, 6); 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1984 } bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1985 SSP_WRITE_BITS(chip->cr0, bits - 1, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 1986 SSP_CR0_MASK_DSS_ST, 0); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1987 bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1988 if (spi->mode & SPI_LSB_FIRST) { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1989 tmp = SSP_RX_LSB; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1990 etx = SSP_TX_LSB; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1991 } else { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1992 tmp = SSP_RX_MSB; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1993 etx = SSP_TX_MSB; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1994 } bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1995 SSP_WRITE_BITS(chip->cr1, tmp, SSP_CR1_MASK_RENDN_ST, 4); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 1996 SSP_WRITE_BITS(chip->cr1, etx, SSP_CR1_MASK_TENDN_ST, 5); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1997 SSP_WRITE_BITS(chip->cr1, chip_info->rx_lev_trig, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1998 SSP_CR1_MASK_RXIFLSEL_ST, 7); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 1999 SSP_WRITE_BITS(chip->cr1, chip_info->tx_lev_trig, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2000 SSP_CR1_MASK_TXIFLSEL_ST, 10); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2001 } else { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2002 SSP_WRITE_BITS(chip->cr0, bits - 1, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2003 SSP_CR0_MASK_DSS, 0); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2004 SSP_WRITE_BITS(chip->cr0, chip_info->iface, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2005 SSP_CR0_MASK_FRF, 4); 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2006 } bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2007 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2008 /* Stuff that is common for all versions */ bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2009 if (spi->mode & SPI_CPOL) bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2010 tmp = SSP_CLK_POL_IDLE_HIGH; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2011 else bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2012 tmp = SSP_CLK_POL_IDLE_LOW; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2013 SSP_WRITE_BITS(chip->cr0, tmp, SSP_CR0_MASK_SPO, 6); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2014 bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2015 if (spi->mode & SPI_CPHA) bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2016 tmp = SSP_CLK_SECOND_EDGE; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2017 else bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2018 tmp = SSP_CLK_FIRST_EDGE; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2019 SSP_WRITE_BITS(chip->cr0, tmp, SSP_CR0_MASK_SPH, 7); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2020 f9d629c737cb668 drivers/spi/amba-pl022.c Linus Walleij 2010-10-01 2021 SSP_WRITE_BITS(chip->cr0, clk_freq.scr, SSP_CR0_MASK_SCR, 8); 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2022 /* Loopback is available on all versions except PL023 */ 06fb01fd1dc624d drivers/spi/amba-pl022.c Philippe Langlais 2011-03-23 2023 if (pl022->vendor->loopback) { bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2024 if (spi->mode & SPI_LOOP) bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2025 tmp = LOOPBACK_ENABLED; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2026 else bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2027 tmp = LOOPBACK_DISABLED; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2028 SSP_WRITE_BITS(chip->cr1, tmp, SSP_CR1_MASK_LBM, 0); bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2029 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2030 SSP_WRITE_BITS(chip->cr1, SSP_DISABLED, SSP_CR1_MASK_SSE, 1); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2031 SSP_WRITE_BITS(chip->cr1, chip_info->hierarchy, SSP_CR1_MASK_MS, 2); f1e45f86ed93b9e drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 2032 SSP_WRITE_BITS(chip->cr1, chip_info->slave_tx_disable, SSP_CR1_MASK_SOD, f1e45f86ed93b9e drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 2033 3); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2034 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2035 /* Save controller_state */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2036 spi_set_ctldata(spi, chip); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2037 return status; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2038 err_config_params: bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2039 spi_set_ctldata(spi, NULL); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2040 kfree(chip); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2041 return status; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2042 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2043 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2044 /** b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2045 * pl022_cleanup - cleanup function registered to SPI master framework b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2046 * @spi: spi device which is requesting cleanup b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2047 * b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2048 * This function is registered to the SPI framework for this SPI master b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2049 * controller. It will free the runtime state of chip. b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2050 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2051 static void pl022_cleanup(struct spi_device *spi) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2052 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2053 struct chip_data *chip = spi_get_ctldata(spi); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2054 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2055 spi_set_ctldata(spi, NULL); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2056 kfree(chip); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2057 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2058 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2059 static struct pl022_ssp_controller * 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2060 pl022_platform_data_dt_get(struct device *dev) 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2061 { 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2062 struct device_node *np = dev->of_node; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2063 struct pl022_ssp_controller *pd; 849794c50b24b93 drivers/spi/spi-pl022.c Rabin Vincent 2017-04-06 2064 u32 tmp = 0; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2065 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2066 if (!np) { 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2067 dev_err(dev, "no dt node defined\n"); 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2068 return NULL; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2069 } 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2070 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2071 pd = devm_kzalloc(dev, sizeof(struct pl022_ssp_controller), GFP_KERNEL); 77538f4a98dc542 drivers/spi/spi-pl022.c Jingoo Han 2014-04-29 2072 if (!pd) 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2073 return NULL; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2074 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2075 pd->bus_id = -1; dbd897b9c6fac8b drivers/spi/spi-pl022.c Linus Walleij 2013-05-23 2076 pd->enable_dma = 1; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2077 of_property_read_u32(np, "num-cs", &tmp); 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2078 pd->num_chipselect = tmp; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2079 of_property_read_u32(np, "pl022,autosuspend-delay", 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2080 &pd->autosuspend_delay); 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2081 pd->rt = of_property_read_bool(np, "pl022,rt"); 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2082 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2083 return pd; 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2084 } 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2085 fd4a319bc933ae9 drivers/spi/spi-pl022.c Grant Likely 2012-12-07 2086 static int pl022_probe(struct amba_device *adev, const struct amba_id *id) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2087 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2088 struct device *dev = &adev->dev; 8074cf063e410a2 drivers/spi/spi-pl022.c Jingoo Han 2013-07-30 2089 struct pl022_ssp_controller *platform_info = 8074cf063e410a2 drivers/spi/spi-pl022.c Jingoo Han 2013-07-30 2090 dev_get_platdata(&adev->dev); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2091 struct spi_master *master; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2092 struct pl022 *pl022 = NULL; /*Data for this driver */ 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2093 struct device_node *np = adev->dev.of_node; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2094 int status = 0, i, num_cs; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2095 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2096 dev_info(&adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2097 "ARM PL022 driver, device ID: 0x%08x\n", adev->periphid); 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2098 if (!platform_info && IS_ENABLED(CONFIG_OF)) 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2099 platform_info = pl022_platform_data_dt_get(dev); 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2100 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2101 if (!platform_info) { 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2102 dev_err(dev, "probe: no platform data defined\n"); aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2103 return -ENODEV; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2104 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2105 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2106 if (platform_info->num_chipselect) { 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2107 num_cs = platform_info->num_chipselect; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2108 } else { 39a6ac11df6579d drivers/spi/spi-pl022.c Roland Stigge 2012-09-18 2109 dev_err(dev, "probe: no chip select defined\n"); aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2110 return -ENODEV; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2111 } 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2112 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2113 /* Allocate master with space for data */ b4b8482690d97ea drivers/spi/spi-pl022.c Roland Stigge 2012-09-03 2114 master = spi_alloc_master(dev, sizeof(struct pl022)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2115 if (master == NULL) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2116 dev_err(&adev->dev, "probe - cannot alloc SPI master\n"); aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2117 return -ENOMEM; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2118 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2119 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2120 pl022 = spi_master_get_devdata(master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2121 pl022->master = master; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2122 pl022->master_info = platform_info; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2123 pl022->adev = adev; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2124 pl022->vendor = id->data; a86854d0c599b32 drivers/spi/spi-pl022.c Kees Cook 2018-06-12 2125 pl022->chipselects = devm_kcalloc(dev, num_cs, sizeof(int), b4b8482690d97ea drivers/spi/spi-pl022.c Roland Stigge 2012-09-03 2126 GFP_KERNEL); 73e3f1eb5188830 drivers/spi/spi-pl022.c Kiran Padwal 2014-09-18 2127 if (!pl022->chipselects) { 73e3f1eb5188830 drivers/spi/spi-pl022.c Kiran Padwal 2014-09-18 2128 status = -ENOMEM; 73e3f1eb5188830 drivers/spi/spi-pl022.c Kiran Padwal 2014-09-18 2129 goto err_no_mem; 73e3f1eb5188830 drivers/spi/spi-pl022.c Kiran Padwal 2014-09-18 2130 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2131 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2132 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2133 * Bus Number Which has been Assigned to this SSP controller b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2134 * on this board b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2135 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2136 master->bus_num = platform_info->bus_id; 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 2137 master->use_gpio_descriptors; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2138 master->num_chipselect = num_cs; 6e5614b6476001a drivers/spi/spi-pl022.c Linus Walleij 2019-06-25 2139 master->set_cs = pl022_set_cs; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2140 master->cleanup = pl022_cleanup; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2141 master->setup = pl022_setup; 29b6e906a70a47c drivers/spi/spi-pl022.c Mark Brown 2013-07-28 2142 master->auto_runtime_pm = true; ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2143 master->transfer_one_message = pl022_transfer_one_message; ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2144 master->unprepare_transfer_hardware = pl022_unprepare_transfer_hardware; ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2145 master->rt = platform_info->rt; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2146 master->dev.of_node = dev->of_node; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2147 516843702bb5fd8 drivers/spi/spi-pl022.c Linus Walleij 2019-04-28 2148 if (pl022->vendor->internal_cs_ctrl) { db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2149 for (i = 0; i < num_cs; i++) db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2150 pl022->chipselects[i] = i; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2151 } else if (IS_ENABLED(CONFIG_OF)) { 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2152 for (i = 0; i < num_cs; i++) { 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2153 int cs_gpio = of_get_named_gpio(np, "cs-gpios", i); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2154 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2155 if (cs_gpio == -EPROBE_DEFER) { 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2156 status = -EPROBE_DEFER; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2157 goto err_no_gpio; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2158 } 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2159 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2160 pl022->chipselects[i] = cs_gpio; 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2161 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2162 if (gpio_is_valid(cs_gpio)) { aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2163 if (devm_gpio_request(dev, cs_gpio, "ssp-pl022")) 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2164 dev_err(&adev->dev, 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2165 "could not request %d gpio\n", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2166 cs_gpio); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2167 else if (gpio_direction_output(cs_gpio, 1)) 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2168 dev_err(&adev->dev, 61e89e65e31516c drivers/spi/spi-pl022.c Roland Stigge 2014-09-09 2169 "could not set gpio %d as output\n", 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2170 cs_gpio); 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2171 } 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2172 } 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2173 } f6f46de1063c882 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2174 bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2175 /* bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2176 * Supports mode 0-3, loopback, and active low CS. Transfers are bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2177 * always MS bit first on the original pl022. bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2178 */ bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2179 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2180 if (pl022->vendor->extended_cr) bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2181 master->mode_bits |= SPI_LSB_FIRST; bde435a9ca376d0 drivers/spi/amba-pl022.c Kevin Wells 2010-09-16 2182 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2183 dev_dbg(&adev->dev, "BUSNO: %d\n", master->bus_num); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2184 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2185 status = amba_request_regions(adev, NULL); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2186 if (status) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2187 goto err_no_ioregion; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2188 b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2189 pl022->phybase = adev->res.start; aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2190 pl022->virtbase = devm_ioremap(dev, adev->res.start, aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2191 resource_size(&adev->res)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2192 if (pl022->virtbase == NULL) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2193 status = -ENOMEM; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2194 goto err_no_ioremap; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2195 } 2c067509a1e3540 drivers/spi/spi-pl022.c Jingoo Han 2013-10-11 2196 dev_info(&adev->dev, "mapped registers from %pa to %p\n", 7085f403517615c drivers/spi/spi-pl022.c Fabio Estevam 2013-08-21 2197 &adev->res.start, pl022->virtbase); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2198 aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2199 pl022->clk = devm_clk_get(&adev->dev, NULL); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2200 if (IS_ERR(pl022->clk)) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2201 status = PTR_ERR(pl022->clk); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2202 dev_err(&adev->dev, "could not retrieve SSP/SPI bus clock\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2203 goto err_no_clk; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2204 } 7ff6bcf048e6a98 drivers/spi/spi-pl022.c Russell King 2011-09-22 2205 6cac167b826eced drivers/spi/spi-pl022.c Ulf Hansson 2014-02-04 2206 status = clk_prepare_enable(pl022->clk); 71e63e748ee6f4b drivers/spi/spi-pl022.c Ulf Hansson 2011-11-04 2207 if (status) { 71e63e748ee6f4b drivers/spi/spi-pl022.c Ulf Hansson 2011-11-04 2208 dev_err(&adev->dev, "could not enable SSP/SPI bus clock\n"); 71e63e748ee6f4b drivers/spi/spi-pl022.c Ulf Hansson 2011-11-04 2209 goto err_no_clk_en; 71e63e748ee6f4b drivers/spi/spi-pl022.c Ulf Hansson 2011-11-04 2210 } 71e63e748ee6f4b drivers/spi/spi-pl022.c Ulf Hansson 2011-11-04 2211 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2212 /* Initialize transfer pump */ ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2213 tasklet_init(&pl022->pump_transfers, pump_transfers, ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2214 (unsigned long)pl022); ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2215 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2216 /* Disable SSP */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2217 writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)), b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2218 SSP_CR1(pl022->virtbase)); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2219 load_ssp_default_config(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2220 aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2221 status = devm_request_irq(dev, adev->irq[0], pl022_interrupt_handler, aeef9915b9a40d2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2222 0, "pl022", pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2223 if (status < 0) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2224 dev_err(&adev->dev, "probe - cannot get IRQ (%d)\n", status); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2225 goto err_no_irq; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2226 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2227 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2228 /* Get DMA channels, try autoconfiguration first */ dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2229 status = pl022_dma_autoprobe(pl022); f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 2230 if (status == -EPROBE_DEFER) { f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 2231 dev_dbg(dev, "deferring probe to get DMA channel\n"); f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 2232 goto err_no_irq; f3d4bb3342630cd drivers/spi/spi-pl022.c Rabin Vincent 2015-11-23 2233 } dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2234 dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2235 /* If that failed, use channels from platform_info */ dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2236 if (status == 0) dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2237 platform_info->enable_dma = 1; dc715452e914515 drivers/spi/spi-pl022.c Arnd Bergmann 2013-01-28 2238 else if (platform_info->enable_dma) { b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2239 status = pl022_dma_probe(pl022); b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2240 if (status != 0) 43c640157d4366a drivers/spi/amba-pl022.c Viresh Kumar 2011-05-16 2241 platform_info->enable_dma = 0; b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2242 } b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2243 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2244 /* Register with the SPI framework */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2245 amba_set_drvdata(adev, pl022); 35794a77168b739 drivers/spi/spi-pl022.c Jingoo Han 2013-09-24 2246 status = devm_spi_register_master(&adev->dev, master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2247 if (status != 0) { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2248 dev_err(&adev->dev, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2249 "probe - problem registering spi master\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2250 goto err_spi_register; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2251 } 25985edcedea639 drivers/spi/amba-pl022.c Lucas De Marchi 2011-03-30 2252 dev_dbg(dev, "probe succeeded\n"); 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2253 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2254 /* let runtime pm put suspend */ 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2255 if (platform_info->autosuspend_delay > 0) { 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2256 dev_info(&adev->dev, 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2257 "will use autosuspend for runtime pm, delay %dms\n", 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2258 platform_info->autosuspend_delay); 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2259 pm_runtime_set_autosuspend_delay(dev, 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2260 platform_info->autosuspend_delay); 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2261 pm_runtime_use_autosuspend(dev); 53e4acea0e819a6 drivers/spi/spi-pl022.c Chris Blair 2011-11-08 2262 } 0df349945752bf0 drivers/spi/spi-pl022.c Ulf Hansson 2012-10-17 2263 pm_runtime_put(dev); 0df349945752bf0 drivers/spi/spi-pl022.c Ulf Hansson 2012-10-17 2264 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2265 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2266 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2267 err_spi_register: 3e3ea716270dc64 drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 2268 if (platform_info->enable_dma) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2269 pl022_dma_remove(pl022); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2270 err_no_irq: 6cac167b826eced drivers/spi/spi-pl022.c Ulf Hansson 2014-02-04 2271 clk_disable_unprepare(pl022->clk); 71e63e748ee6f4b drivers/spi/spi-pl022.c Ulf Hansson 2011-11-04 2272 err_no_clk_en: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2273 err_no_clk: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2274 err_no_ioremap: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2275 amba_release_regions(adev); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2276 err_no_ioregion: 6d3952a7dfa8091 drivers/spi/spi-pl022.c Roland Stigge 2012-08-22 2277 err_no_gpio: 73e3f1eb5188830 drivers/spi/spi-pl022.c Kiran Padwal 2014-09-18 2278 err_no_mem: b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2279 spi_master_put(master); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2280 return status; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2281 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2282 fd4a319bc933ae9 drivers/spi/spi-pl022.c Grant Likely 2012-12-07 2283 static int b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2284 pl022_remove(struct amba_device *adev) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2285 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2286 struct pl022 *pl022 = amba_get_drvdata(adev); 50658b6602dad6d drivers/spi/spi-pl022.c Linus Walleij 2011-08-02 2287 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2288 if (!pl022) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2289 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2290 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2291 /* 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2292 * undo pm_runtime_put() in probe. I assume that we're not 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2293 * accessing the primecell here. 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2294 */ 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2295 pm_runtime_get_noresume(&adev->dev); 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2296 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2297 load_ssp_default_config(pl022); 3e3ea716270dc64 drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 2298 if (pl022->master_info->enable_dma) b1b6b9aa6fd32db drivers/spi/amba-pl022.c Linus Walleij 2010-09-29 2299 pl022_dma_remove(pl022); 3e3ea716270dc64 drivers/spi/spi-pl022.c Viresh Kumar 2011-08-10 2300 6cac167b826eced drivers/spi/spi-pl022.c Ulf Hansson 2014-02-04 2301 clk_disable_unprepare(pl022->clk); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2302 amba_release_regions(adev); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2303 tasklet_disable(&pl022->pump_transfers); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2304 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2305 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2306 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2307 #ifdef CONFIG_PM_SLEEP 6cfa6279edbffa9 drivers/spi/spi-pl022.c Peter Hüwe 2011-09-05 2308 static int pl022_suspend(struct device *dev) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2309 { 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2310 struct pl022 *pl022 = dev_get_drvdata(dev); ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2311 int ret; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2312 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2313 ret = spi_master_suspend(pl022->master); 7c5d8a249acadc3 drivers/spi/spi-pl022.c Geert Uytterhoeven 2018-09-05 2314 if (ret) ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2315 return ret; 4964a26df72c4a8 drivers/spi/spi-pl022.c Ulf Hansson 2012-10-17 2316 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2317 ret = pm_runtime_force_suspend(dev); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2318 if (ret) { 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2319 spi_master_resume(pl022->master); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2320 return ret; 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2321 } 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2322 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2323 pinctrl_pm_select_sleep_state(dev); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2324 6cfa6279edbffa9 drivers/spi/spi-pl022.c Peter Hüwe 2011-09-05 2325 dev_dbg(dev, "suspended\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2326 return 0; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2327 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2328 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2329 static int pl022_resume(struct device *dev) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2330 { 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2331 struct pl022 *pl022 = dev_get_drvdata(dev); ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2332 int ret; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2333 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2334 ret = pm_runtime_force_resume(dev); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2335 if (ret) 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2336 dev_err(dev, "problem resuming\n"); ada7aec7eec0ca2 drivers/spi/spi-pl022.c Linus Walleij 2012-09-26 2337 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2338 /* Start the queue running */ ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2339 ret = spi_master_resume(pl022->master); 7c5d8a249acadc3 drivers/spi/spi-pl022.c Geert Uytterhoeven 2018-09-05 2340 if (!ret) 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2341 dev_dbg(dev, "resumed\n"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2342 ffbbdd21329f3e1 drivers/spi/spi-pl022.c Linus Walleij 2012-02-22 2343 return ret; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2344 } 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2345 #endif b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2346 736198b0486c8d5 drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2347 #ifdef CONFIG_PM 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2348 static int pl022_runtime_suspend(struct device *dev) 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2349 { 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2350 struct pl022 *pl022 = dev_get_drvdata(dev); 4f5e1b370845a0a drivers/spi/spi-pl022.c Patrice Chotard 2012-09-19 2351 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2352 clk_disable_unprepare(pl022->clk); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2353 pinctrl_pm_select_idle_state(dev); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2354 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2355 return 0; 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2356 } 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2357 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2358 static int pl022_runtime_resume(struct device *dev) 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2359 { 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2360 struct pl022 *pl022 = dev_get_drvdata(dev); 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2361 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2362 pinctrl_pm_select_default_state(dev); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2363 clk_prepare_enable(pl022->clk); 84a5dc41f64faad drivers/spi/spi-pl022.c Ulf Hansson 2014-03-01 2364 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2365 return 0; 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2366 } 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2367 #endif 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2368 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2369 static const struct dev_pm_ops pl022_dev_pm_ops = { 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2370 SET_SYSTEM_SLEEP_PM_OPS(pl022_suspend, pl022_resume) 6ed23b806e73bdd drivers/spi/spi-pl022.c Rafael J. Wysocki 2014-12-04 2371 SET_RUNTIME_PM_OPS(pl022_runtime_suspend, pl022_runtime_resume, NULL) 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2372 }; 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2373 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2374 static struct vendor_data vendor_arm = { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2375 .fifodepth = 8, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2376 .max_bpw = 16, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2377 .unidir = false, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2378 .extended_cr = false, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2379 .pl023 = false, 06fb01fd1dc624d drivers/spi/amba-pl022.c Philippe Langlais 2011-03-23 2380 .loopback = true, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2381 .internal_cs_ctrl = false, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2382 }; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2383 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2384 static struct vendor_data vendor_st = { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2385 .fifodepth = 32, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2386 .max_bpw = 32, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2387 .unidir = false, 556f4aeb7d9dfac drivers/spi/amba-pl022.c Linus Walleij 2010-05-05 2388 .extended_cr = true, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2389 .pl023 = false, 06fb01fd1dc624d drivers/spi/amba-pl022.c Philippe Langlais 2011-03-23 2390 .loopback = true, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2391 .internal_cs_ctrl = false, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2392 }; 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2393 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2394 static struct vendor_data vendor_st_pl023 = { 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2395 .fifodepth = 32, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2396 .max_bpw = 32, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2397 .unidir = false, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2398 .extended_cr = true, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2399 .pl023 = true, 06fb01fd1dc624d drivers/spi/amba-pl022.c Philippe Langlais 2011-03-23 2400 .loopback = false, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2401 .internal_cs_ctrl = false, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2402 }; db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2403 db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2404 static struct vendor_data vendor_lsi = { db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2405 .fifodepth = 8, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2406 .max_bpw = 16, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2407 .unidir = false, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2408 .extended_cr = false, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2409 .pl023 = false, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2410 .loopback = true, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2411 .internal_cs_ctrl = true, 06fb01fd1dc624d drivers/spi/amba-pl022.c Philippe Langlais 2011-03-23 2412 }; 06fb01fd1dc624d drivers/spi/amba-pl022.c Philippe Langlais 2011-03-23 2413 5b8d5ad2308d2d5 drivers/spi/spi-pl022.c Arvind Yadav 2017-08-23 2414 static const struct amba_id pl022_ids[] = { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2415 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2416 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2417 * ARM PL022 variant, this has a 16bit wide b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2418 * and 8 locations deep TX/RX FIFO b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2419 */ b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2420 .id = 0x00041022, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2421 .mask = 0x000fffff, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2422 .data = &vendor_arm, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2423 }, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2424 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2425 /* b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2426 * ST Micro derivative, this has 32bit wide b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2427 * and 32 locations deep TX/RX FIFO b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2428 */ e89e04fcdce6146 drivers/spi/amba-pl022.c Srinidhi Kasagar 2009-10-05 2429 .id = 0x01080022, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2430 .mask = 0xffffffff, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2431 .data = &vendor_st, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2432 }, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2433 { 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2434 /* 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2435 * ST-Ericsson derivative "PL023" (this is not 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2436 * an official ARM number), this is a PL022 SSP block 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2437 * stripped to SPI mode only, it has 32bit wide 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2438 * and 32 locations deep TX/RX FIFO but no extended 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2439 * CR0/CR1 register 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2440 */ 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2441 .id = 0x00080023, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2442 .mask = 0xffffffff, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2443 .data = &vendor_st_pl023, 781c7b129b1beb8 drivers/spi/amba-pl022.c Linus Walleij 2010-05-07 2444 }, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2445 { db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2446 /* db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2447 * PL022 variant that has a chip select control register whih db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2448 * allows control of 5 output signals nCS[0:4]. db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2449 */ db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2450 .id = 0x000b6022, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2451 .mask = 0x000fffff, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2452 .data = &vendor_lsi, db4fa45ed3182d8 drivers/spi/spi-pl022.c Anders Berg 2014-09-17 2453 }, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2454 { 0, 0 }, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2455 }; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2456 7eeac71b9fc9b3d drivers/spi/spi-pl022.c Dave Martin 2011-10-05 2457 MODULE_DEVICE_TABLE(amba, pl022_ids); 7eeac71b9fc9b3d drivers/spi/spi-pl022.c Dave Martin 2011-10-05 2458 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2459 static struct amba_driver pl022_driver = { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2460 .drv = { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2461 .name = "ssp-pl022", 92b97f0aaccbf9d drivers/spi/spi-pl022.c Russell King 2011-08-14 2462 .pm = &pl022_dev_pm_ops, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2463 }, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2464 .id_table = pl022_ids, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2465 .probe = pl022_probe, fd4a319bc933ae9 drivers/spi/spi-pl022.c Grant Likely 2012-12-07 2466 .remove = pl022_remove, b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2467 }; b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2468 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2469 static int __init pl022_init(void) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2470 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2471 return amba_driver_register(&pl022_driver); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2472 } 25c8e03bdb769df drivers/spi/amba-pl022.c Linus Walleij 2010-09-06 2473 subsys_initcall(pl022_init); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2474 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2475 static void __exit pl022_exit(void) b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2476 { b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2477 amba_driver_unregister(&pl022_driver); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2478 } b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2479 module_exit(pl022_exit); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2480 b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2481 MODULE_AUTHOR("Linus Walleij <linus.walleij@xxxxxxxxxxxxxx>"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2482 MODULE_DESCRIPTION("PL022 SSP Controller Driver"); b43d65f7e818485 drivers/spi/amba-pl022.c Linus Walleij 2009-06-09 2483 MODULE_LICENSE("GPL"); :::::: The code at line 442 was first introduced by commit :::::: db4fa45ed3182d8206af241811dfc99369ffa849 spi: pl022: Add support for chip select extension :::::: TO: Anders Berg <anders.berg@xxxxxxxxxxxxx> :::::: CC: Mark Brown <broonie@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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