sdio: add low level i/o functions for workarounds
From: Pierre Ossman <drzeus@xxxxxxxxx>
Some shoddy hardware doesn't properly adhere to the register model
of SDIO, but treats the system like a series of transaction. That means
that the drivers must have full control over what goes the bus (and the
core cannot optimize transactions or work around problems in host
controllers).
This commit adds some low level functions that gives SDIO drivers the
ability to send specific register access commands. They should only be
used when the hardware is truly broken though.
This patch has been created on August 2008, and re-generated against 2.6.29-rc7 .
Signed-off-by: Pierre Ossman <drzeus@xxxxxxxxx>
Signed-off-by: Uri Shkolnik <uris@xxxxxxxxxxxx>
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/core/sdio_io.c linux-2.6.29-rc7/drivers/mmc/core/sdio_io.c
--- linux-2.6.29-rc7.prestine/drivers/mmc/core/sdio_io.c 2009-03-04 03:05:22.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/core/sdio_io.c 2009-03-12 12:22:42.000000000 +0200
@@ -635,3 +635,252 @@
*err_ret = ret;
}
EXPORT_SYMBOL_GPL(sdio_f0_writeb);
+
+/**
+ * sdio_read_bytes - low level byte mode transfer from an SDIO function
+ * @func: SDIO function to access
+ * @dst: buffer to store the data
+ * @addr: address to begin reading from
+ * @bytes: number of bytes to read
+ *
+ * Performs a byte mode transfer from the address space of the given
+ * SDIO function. The address is increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_read_bytes(struct sdio_func *func, void *dst,
+ unsigned int addr, int bytes)
+{
+ if (bytes > sdio_max_byte_size(func))
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 0, func->num, addr, 1,
+ dst, 1, bytes);
+}
+EXPORT_SYMBOL_GPL(sdio_read_bytes);
+
+/**
+ * sdio_read_bytes_noincr - low level byte mode transfer from an SDIO function
+ * @func: SDIO function to access
+ * @dst: buffer to store the data
+ * @addr: address to begin reading from
+ * @bytes: number of bytes to read
+ *
+ * Performs a byte mode transfer from the address space of the given
+ * SDIO function. The address is NOT increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_read_bytes_noincr(struct sdio_func *func, void *dst,
+ unsigned int addr, int bytes)
+{
+ if (bytes > sdio_max_byte_size(func))
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 0, func->num, addr, 0,
+ dst, 1, bytes);
+}
+EXPORT_SYMBOL_GPL(sdio_read_bytes_noincr);
+
+/**
+ * sdio_read_blocks - low level block mode transfer from an SDIO function
+ * @func: SDIO function to access
+ * @dst: buffer to store the data
+ * @addr: address to begin reading from
+ * @block: number of blocks to read
+ *
+ * Performs a block mode transfer from the address space of the given
+ * SDIO function. The address is increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * The block size needs to be explicitly changed by calling
+ * sdio_set_block_size().
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_read_blocks(struct sdio_func *func, void *dst,
+ unsigned int addr, int blocks)
+{
+ if (!func->card->cccr.multi_block)
+ return -EINVAL;
+
+ if (blocks > func->card->host->max_blk_count)
+ return -EINVAL;
+ if (blocks > (func->card->host->max_seg_size / func->cur_blksize))
+ return -EINVAL;
+ if (blocks > 511)
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 0, func->num, addr, 1,
+ dst, blocks, func->cur_blksize);
+}
+EXPORT_SYMBOL_GPL(sdio_read_blocks);
+
+/**
+ * sdio_read_blocks_noincr - low level block mode transfer from an SDIO function
+ * @func: SDIO function to access
+ * @dst: buffer to store the data
+ * @addr: address to begin reading from
+ * @block: number of blocks to read
+ *
+ * Performs a block mode transfer from the address space of the given
+ * SDIO function. The address is NOT increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * The block size needs to be explicitly changed by calling
+ * sdio_set_block_size().
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_read_blocks_noincr(struct sdio_func *func, void *dst,
+ unsigned int addr, int blocks)
+{
+ if (!func->card->cccr.multi_block)
+ return -EINVAL;
+
+ if (blocks > func->card->host->max_blk_count)
+ return -EINVAL;
+ if (blocks > (func->card->host->max_seg_size / func->cur_blksize))
+ return -EINVAL;
+ if (blocks > 511)
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 0, func->num, addr, 0,
+ dst, blocks, func->cur_blksize);
+}
+EXPORT_SYMBOL_GPL(sdio_read_blocks_noincr);
+
+/**
+ * sdio_write_bytes - low level byte mode transfer to an SDIO function
+ * @func: SDIO function to access
+ * @addr: address to start writing to
+ * @src: buffer that contains the data to write
+ * @bytes: number of bytes to write
+ *
+ * Performs a byte mode transfer to the address space of the given
+ * SDIO function. The address is increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_write_bytes(struct sdio_func *func, unsigned int addr,
+ void *src, int bytes)
+{
+ if (bytes > sdio_max_byte_size(func))
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 1, func->num, addr, 1,
+ src, 1, bytes);
+}
+EXPORT_SYMBOL_GPL(sdio_write_bytes);
+
+/**
+ * sdio_write_bytes_noincr - low level byte mode transfer to an SDIO function
+ * @func: SDIO function to access
+ * @addr: address to start writing to
+ * @src: buffer that contains the data to write
+ * @bytes: number of bytes to write
+ *
+ * Performs a byte mode transfer to the address space of the given
+ * SDIO function. The address is NOT increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_write_bytes_noincr(struct sdio_func *func, unsigned int addr,
+ void *src, int bytes)
+{
+ if (bytes > sdio_max_byte_size(func))
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 1, func->num, addr, 0,
+ src, 1, bytes);
+}
+EXPORT_SYMBOL_GPL(sdio_write_bytes_noincr);
+
+/**
+ * sdio_read_blocks - low level block mode transfer to an SDIO function
+ * @func: SDIO function to access
+ * @addr: address to start writing to
+ * @src: buffer that contains the data to write
+ * @block: number of blocks to write
+ *
+ * Performs a block mode transfer to the address space of the given
+ * SDIO function. The address is increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * The block size needs to be explicitly changed by calling
+ * sdio_set_block_size().
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_write_blocks(struct sdio_func *func, unsigned int addr,
+ void *src, int blocks)
+{
+ if (!func->card->cccr.multi_block)
+ return -EINVAL;
+
+ if (blocks > func->card->host->max_blk_count)
+ return -EINVAL;
+ if (blocks > (func->card->host->max_seg_size / func->cur_blksize))
+ return -EINVAL;
+ if (blocks > 511)
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 1, func->num, addr, 1,
+ src, blocks, func->cur_blksize);
+}
+EXPORT_SYMBOL_GPL(sdio_write_blocks);
+
+/**
+ * sdio_read_blocks_noincr - low level block mode transfer to an SDIO function
+ * @func: SDIO function to access
+ * @addr: address to start writing to
+ * @src: buffer that contains the data to write
+ * @block: number of blocks to write
+ *
+ * Performs a block mode transfer to the address space of the given
+ * SDIO function. The address is NOT increased for each byte. Return
+ * value indicates if the transfer succeeded or not.
+ *
+ * The block size needs to be explicitly changed by calling
+ * sdio_set_block_size().
+ *
+ * Note: This is a low level function that should only be used as a
+ * workaround when the hardware has a crappy register abstraction
+ * that relies on specific SDIO operations.
+ */
+int sdio_write_blocks_noincr(struct sdio_func *func, unsigned int addr,
+ void *src, int blocks)
+{
+ if (!func->card->cccr.multi_block)
+ return -EINVAL;
+
+ if (blocks > func->card->host->max_blk_count)
+ return -EINVAL;
+ if (blocks > (func->card->host->max_seg_size / func->cur_blksize))
+ return -EINVAL;
+ if (blocks > 511)
+ return -EINVAL;
+
+ return mmc_io_rw_extended(func->card, 1, func->num, addr, 0,
+ src, blocks, func->cur_blksize);
+}
+EXPORT_SYMBOL_GPL(sdio_write_blocks_noincr);
+
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/Module.symvers linux-2.6.29-rc7/drivers/mmc/Module.symvers
--- linux-2.6.29-rc7.prestine/drivers/mmc/Module.symvers 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/Module.symvers 2009-03-12 12:22:53.000000000 +0200
@@ -0,0 +1,55 @@
+0xc0ce4698 sdhci_suspend_host drivers/mmc/host/sdhci EXPORT_SYMBOL_GPL
+0x4531d0d5 mmc_cleanup_queue drivers/mmc/card/mmc_block EXPORT_SYMBOL
+0x3ea1f141 sdhci_alloc_host drivers/mmc/host/sdhci EXPORT_SYMBOL_GPL
+0xcbafc4f4 mmc_wait_for_req drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x9f9ab527 mmc_add_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0xaa53d49a sdio_read_bytes drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x28c8f1ba sdhci_add_host drivers/mmc/host/sdhci EXPORT_SYMBOL_GPL
+0x7c288b18 sdio_unregister_driver drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x97734726 sdhci_remove_host drivers/mmc/host/sdhci EXPORT_SYMBOL_GPL
+0xfe7a751e sdio_claim_host drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x184b82fb mmc_vddrange_to_ocrmask drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x5ba8d484 sdio_f0_writeb drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x69d099e7 mmc_release_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0xb83440a4 sdhci_free_host drivers/mmc/host/sdhci EXPORT_SYMBOL_GPL
+0x90888d71 sdio_release_irq drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x18bdeb0f mmc_wait_for_cmd drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x5c7e0b62 mmc_register_driver drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x526dca1e sdio_write_bytes_noincr drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xab6d6203 sdio_read_blocks_noincr drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x729dbbc4 mmc_request_done drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0xa0fe6cc1 sdio_writew drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x4e3aef85 sdio_register_driver drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xeb0e9c58 sdhci_resume_host drivers/mmc/host/sdhci EXPORT_SYMBOL_GPL
+0xf45a94f7 sdio_write_bytes drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xc046bd90 sdio_read_blocks drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x8146b5a4 sdio_writesb drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x767ceee5 sdio_claim_irq drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xcf115857 sdio_writeb drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xc44f1300 sdio_readsb drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x2e8232bb mmc_detect_change drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x7fe0ecd3 sdio_readb drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xa2905df5 sdio_readw drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x2c5566fc sdio_readl drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x678efb7f mmc_wait_for_app_cmd drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x610e2914 mmc_free_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0xc2f4fcf4 mmc_remove_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x0ddfdcef mmc_set_data_timeout drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x0b87a075 sdio_writel drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xd2b0cfe7 sdio_memcpy_toio drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xbad0cc0f sdio_set_block_size drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xcb828fbe sdio_write_blocks_noincr drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xdc7d6c4a sdio_read_bytes_noincr drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x60c50804 sdio_f0_readb drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x0d0a7dbd __mmc_claim_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x1193ec99 mmc_unregister_driver drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x5015d587 mmc_resume_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x50bc625c mmc_alloc_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0xb909aa80 sdio_align_size drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x0a7c2552 sdio_enable_func drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x030ef47a sdio_disable_func drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xe036df12 sdio_memcpy_fromio drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0xf8c6144f mmc_suspend_host drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0x8d1fd8a9 sdio_release_host drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
+0x6cfa4491 mmc_align_data_size drivers/mmc/core/mmc_core EXPORT_SYMBOL
+0xff7cc1c3 sdio_write_blocks drivers/mmc/core/mmc_core EXPORT_SYMBOL_GPL
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/mmc_block.mod linux-2.6.29-rc7/drivers/mmc/.tmp_versions/mmc_block.mod
--- linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/mmc_block.mod 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/.tmp_versions/mmc_block.mod 2009-03-12 12:22:45.000000000 +0200
@@ -0,0 +1,2 @@
+drivers/mmc/card/mmc_block.ko
+drivers/mmc/card/block.o drivers/mmc/card/queue.o
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/mmc_core.mod linux-2.6.29-rc7/drivers/mmc/.tmp_versions/mmc_core.mod
--- linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/mmc_core.mod 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/.tmp_versions/mmc_core.mod 2009-03-12 12:22:48.000000000 +0200
@@ -0,0 +1,2 @@
+drivers/mmc/core/mmc_core.ko
+drivers/mmc/core/core.o drivers/mmc/core/bus.o drivers/mmc/core/host.o drivers/mmc/core/mmc.o drivers/mmc/core/mmc_ops.o drivers/mmc/core/sd.o drivers/mmc/core/sd_ops.o drivers/mmc/core/sdio.o drivers/mmc/core/sdio_ops.o drivers/mmc/core/sdio_bus.o drivers/mmc/core/sdio_cis.o drivers/mmc/core/sdio_io.o drivers/mmc/core/sdio_irq.o drivers/mmc/core/debugfs.o
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/sdhci.mod linux-2.6.29-rc7/drivers/mmc/.tmp_versions/sdhci.mod
--- linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/sdhci.mod 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/.tmp_versions/sdhci.mod 2009-03-12 12:22:50.000000000 +0200
@@ -0,0 +1,2 @@
+drivers/mmc/host/sdhci.ko
+drivers/mmc/host/sdhci.o
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/sdio_uart.mod linux-2.6.29-rc7/drivers/mmc/.tmp_versions/sdio_uart.mod
--- linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/sdio_uart.mod 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/.tmp_versions/sdio_uart.mod 2009-03-12 12:22:45.000000000 +0200
@@ -0,0 +1,2 @@
+drivers/mmc/card/sdio_uart.ko
+drivers/mmc/card/sdio_uart.o
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/tifm_sd.mod linux-2.6.29-rc7/drivers/mmc/.tmp_versions/tifm_sd.mod
--- linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/tifm_sd.mod 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/.tmp_versions/tifm_sd.mod 2009-03-12 12:22:53.000000000 +0200
@@ -0,0 +1,2 @@
+drivers/mmc/host/tifm_sd.ko
+drivers/mmc/host/tifm_sd.o
diff -uNr linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/wbsd.mod linux-2.6.29-rc7/drivers/mmc/.tmp_versions/wbsd.mod
--- linux-2.6.29-rc7.prestine/drivers/mmc/.tmp_versions/wbsd.mod 1970-01-01 02:00:00.000000000 +0200
+++ linux-2.6.29-rc7/drivers/mmc/.tmp_versions/wbsd.mod 2009-03-12 12:22:52.000000000 +0200
@@ -0,0 +1,2 @@
+drivers/mmc/host/wbsd.ko
+drivers/mmc/host/wbsd.o
diff -uNr linux-2.6.29-rc7.prestine/include/linux/mmc/sdio_func.h linux-2.6.29-rc7/include/linux/mmc/sdio_func.h
--- linux-2.6.29-rc7.prestine/include/linux/mmc/sdio_func.h 2009-03-04 03:05:22.000000000 +0200
+++ linux-2.6.29-rc7/include/linux/mmc/sdio_func.h 2009-03-12 11:51:55.000000000 +0200
@@ -150,5 +150,31 @@
extern void sdio_f0_writeb(struct sdio_func *func, unsigned char b,
unsigned int addr, int *err_ret);
+/*
+ * Low-level I/O functions for hardware that doesn't properly abstract
+ * the register space. Don't use these unless you absolutely have to.
+ */
+
+extern int sdio_read_bytes(struct sdio_func *func, void *dst,
+ unsigned int addr, int bytes);
+extern int sdio_read_bytes_noincr(struct sdio_func *func, void *dst,
+ unsigned int addr, int bytes);
+
+extern int sdio_read_blocks(struct sdio_func *func, void *dst,
+ unsigned int addr, int blocks);
+extern int sdio_read_blocks_noincr(struct sdio_func *func, void *dst,
+ unsigned int addr, int blocks);
+
+extern int sdio_write_bytes(struct sdio_func *func, unsigned int addr,
+ void *src, int bytes);
+extern int sdio_write_bytes_noincr(struct sdio_func *func, unsigned int addr,
+ void *src, int bytes);
+
+extern int sdio_write_blocks(struct sdio_func *func, unsigned int addr,
+ void *src, int blocks);
+extern int sdio_write_blocks_noincr(struct sdio_func *func, unsigned int addr,
+ void *src, int blocks);
+
+
#endif
diff -uNr linux-2.6.29-rc7.prestine/include/linux/mmc/sdio_ids.h linux-2.6.29-rc7/include/linux/mmc/sdio_ids.h
--- linux-2.6.29-rc7.prestine/include/linux/mmc/sdio_ids.h 2009-03-04 03:05:22.000000000 +0200
+++ linux-2.6.29-rc7/include/linux/mmc/sdio_ids.h 2009-03-12 12:24:14.000000000 +0200
@@ -24,6 +24,14 @@
*/
#define SDIO_VENDOR_ID_MARVELL 0x02df
+#define SDIO_VENDOR_ID_SIANO 0x039a
+
#define SDIO_DEVICE_ID_MARVELL_LIBERTAS 0x9103
+#define SDIO_DEVICE_ID_SIANO_STELLAR 0x5347
+#define SDIO_DEVICE_ID_SIANO_NOVA_A0 0x1100
+#define SDIO_DEVICE_ID_SIANO_NOVA_B0 0x0201
+#define SDIO_DEVICE_ID_SIANO_NICE 0x0202
+#define SDIO_DEVICE_ID_SIANO_VEGA_A0 0x0300
+#define SDIO_DEVICE_ID_SIANO_VENICE 0x0301
#endif
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