pxa2xx-uart was a separate uart platform driver. It was declaring the same device names and numbers as 8250 driver. As a result, it was impossible to use 8250 driver on PXA SoCs. Upon closer examination pxa2xx-uart turned out to be a clone of 8250_core driver. Workaround for Erratum #19 according to Marvel(R) PXA270M Processor Specification Update (April 19, 2010) is dropped. 8250_core reads from FIFO immediately after checking DR bit in LSR. Signed-off-by: Sergei Ianovich <ynvich@xxxxxxxxx> CC: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> CC: James Cameron <quozl@xxxxxxxxxx> --- changes v1..v2 * actually implement workaround for E74 in dl_write as spooted by James Cameron * added comment about E19 in commit message arch/arm/configs/am200epdkit_defconfig | 3 +- arch/arm/configs/cm_x2xx_defconfig | 3 +- arch/arm/configs/cm_x300_defconfig | 3 +- arch/arm/configs/colibri_pxa270_defconfig | 3 +- arch/arm/configs/colibri_pxa300_defconfig | 3 +- arch/arm/configs/corgi_defconfig | 4 +- arch/arm/configs/em_x270_defconfig | 3 +- arch/arm/configs/ezx_defconfig | 3 +- arch/arm/configs/h5000_defconfig | 3 +- arch/arm/configs/imote2_defconfig | 3 +- arch/arm/configs/lpd270_defconfig | 3 +- arch/arm/configs/lubbock_defconfig | 3 +- arch/arm/configs/mainstone_defconfig | 3 +- arch/arm/configs/mmp2_defconfig | 3 +- arch/arm/configs/pcm027_defconfig | 3 +- arch/arm/configs/pxa168_defconfig | 3 +- arch/arm/configs/pxa255-idp_defconfig | 3 +- arch/arm/configs/pxa3xx_defconfig | 3 +- arch/arm/configs/pxa910_defconfig | 3 +- arch/arm/configs/raumfeld_defconfig | 3 +- arch/arm/configs/spitz_defconfig | 4 +- arch/arm/configs/trizeps4_defconfig | 3 +- arch/arm/configs/viper_defconfig | 4 +- arch/arm/configs/xcep_defconfig | 3 +- drivers/tty/serial/8250/8250_pxa.c | 189 ++++++ drivers/tty/serial/8250/Kconfig | 9 + drivers/tty/serial/8250/Makefile | 1 + drivers/tty/serial/Kconfig | 23 - drivers/tty/serial/Makefile | 1 - drivers/tty/serial/pxa.c | 971 ------------------------------ 30 files changed, 247 insertions(+), 1022 deletions(-) create mode 100644 drivers/tty/serial/8250/8250_pxa.c delete mode 100644 drivers/tty/serial/pxa.c diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig index f0dea52..0cde234 100644 --- a/arch/arm/configs/am200epdkit_defconfig +++ b/arch/arm/configs/am200epdkit_defconfig @@ -60,8 +60,9 @@ CONFIG_BLK_DEV_IDECS=m CONFIG_NETDEVICES=y CONFIG_NET_ETHERNET=y CONFIG_SMC91X=m +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set # CONFIG_HW_RANDOM is not set # CONFIG_HWMON is not set diff --git a/arch/arm/configs/cm_x2xx_defconfig b/arch/arm/configs/cm_x2xx_defconfig index a93ff8d..b9fbe65 100644 --- a/arch/arm/configs/cm_x2xx_defconfig +++ b/arch/arm/configs/cm_x2xx_defconfig @@ -96,8 +96,9 @@ CONFIG_KEYBOARD_PXA27x=m CONFIG_INPUT_TOUCHSCREEN=y CONFIG_TOUCHSCREEN_UCB1400=m # CONFIG_SERIO_SERPORT is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_LEGACY_PTY_COUNT=16 # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/cm_x300_defconfig b/arch/arm/configs/cm_x300_defconfig index f4b7672..53a82ae 100644 --- a/arch/arm/configs/cm_x300_defconfig +++ b/arch/arm/configs/cm_x300_defconfig @@ -80,8 +80,9 @@ CONFIG_TOUCHSCREEN_WM97XX=m # CONFIG_TOUCHSCREEN_WM9713 is not set # CONFIG_SERIO is not set # CONFIG_LEGACY_PTYS is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_HW_RANDOM is not set CONFIG_I2C=y CONFIG_I2C_PXA=y diff --git a/arch/arm/configs/colibri_pxa270_defconfig b/arch/arm/configs/colibri_pxa270_defconfig index 2ef2c5e..1ce0409 100644 --- a/arch/arm/configs/colibri_pxa270_defconfig +++ b/arch/arm/configs/colibri_pxa270_defconfig @@ -103,8 +103,9 @@ CONFIG_INPUT_TOUCHSCREEN=y CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=m CONFIG_SERIO_LIBPS2=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_HW_RANDOM=y CONFIG_I2C=y CONFIG_I2C_CHARDEV=y diff --git a/arch/arm/configs/colibri_pxa300_defconfig b/arch/arm/configs/colibri_pxa300_defconfig index b985334..f96bda0 100644 --- a/arch/arm/configs/colibri_pxa300_defconfig +++ b/arch/arm/configs/colibri_pxa300_defconfig @@ -31,8 +31,9 @@ CONFIG_INPUT_EVDEV=y # CONFIG_INPUT_MOUSE is not set CONFIG_INPUT_MISC=y CONFIG_INPUT_GPIO_ROTARY_ENCODER=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_HW_RANDOM=y CONFIG_DEBUG_GPIO=y # CONFIG_HWMON is not set diff --git a/arch/arm/configs/corgi_defconfig b/arch/arm/configs/corgi_defconfig index 1fd1d1d..bb4842d 100644 --- a/arch/arm/configs/corgi_defconfig +++ b/arch/arm/configs/corgi_defconfig @@ -131,10 +131,10 @@ CONFIG_TOUCHSCREEN_ADS7846=y CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=m # CONFIG_SERIO is not set -CONFIG_SERIAL_8250=m +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_CS=m CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set CONFIG_I2C=y CONFIG_I2C_PXA=y diff --git a/arch/arm/configs/em_x270_defconfig b/arch/arm/configs/em_x270_defconfig index 60a21e0..ec0ec54 100644 --- a/arch/arm/configs/em_x270_defconfig +++ b/arch/arm/configs/em_x270_defconfig @@ -90,8 +90,9 @@ CONFIG_TOUCHSCREEN_WM97XX=m # CONFIG_TOUCHSCREEN_WM9705 is not set # CONFIG_TOUCHSCREEN_WM9713 is not set # CONFIG_SERIO_SERPORT is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_LEGACY_PTY_COUNT=16 # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/ezx_defconfig b/arch/arm/configs/ezx_defconfig index d95763d..631e2ec 100644 --- a/arch/arm/configs/ezx_defconfig +++ b/arch/arm/configs/ezx_defconfig @@ -215,8 +215,9 @@ CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=y CONFIG_INPUT_PCAP=y # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_LEGACY_PTY_COUNT=8 # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/h5000_defconfig b/arch/arm/configs/h5000_defconfig index 37903e3..655b735 100644 --- a/arch/arm/configs/h5000_defconfig +++ b/arch/arm/configs/h5000_defconfig @@ -47,8 +47,9 @@ CONFIG_MTD_PHYSMAP=y # CONFIG_INPUT_KEYBOARD is not set # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_LEGACY_PTY_COUNT=32 # CONFIG_HW_RANDOM is not set # CONFIG_HWMON is not set diff --git a/arch/arm/configs/imote2_defconfig b/arch/arm/configs/imote2_defconfig index fd996bb..49d45e9 100644 --- a/arch/arm/configs/imote2_defconfig +++ b/arch/arm/configs/imote2_defconfig @@ -193,8 +193,9 @@ CONFIG_INPUT_TOUCHSCREEN=y CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=y # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_LEGACY_PTY_COUNT=8 # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/lpd270_defconfig b/arch/arm/configs/lpd270_defconfig index 1c8c9ee..c3927b6 100644 --- a/arch/arm/configs/lpd270_defconfig +++ b/arch/arm/configs/lpd270_defconfig @@ -38,8 +38,9 @@ CONFIG_SMC91X=y CONFIG_INPUT_EVDEV=y # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO_SERPORT is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_HW_RANDOM is not set CONFIG_FB=y CONFIG_FB_PXA=y diff --git a/arch/arm/configs/lubbock_defconfig b/arch/arm/configs/lubbock_defconfig index c4ba274..c8b0436 100644 --- a/arch/arm/configs/lubbock_defconfig +++ b/arch/arm/configs/lubbock_defconfig @@ -37,8 +37,9 @@ CONFIG_PCMCIA_PCNET=y CONFIG_INPUT_EVDEV=y # CONFIG_SERIO_SERPORT is not set CONFIG_SERIO_SA1111=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_VGA_CONSOLE is not set CONFIG_USB_GADGET=y CONFIG_USB_G_SERIAL=m diff --git a/arch/arm/configs/mainstone_defconfig b/arch/arm/configs/mainstone_defconfig index 04efa1b..768892c 100644 --- a/arch/arm/configs/mainstone_defconfig +++ b/arch/arm/configs/mainstone_defconfig @@ -34,8 +34,9 @@ CONFIG_SMC91X=y CONFIG_INPUT_EVDEV=y # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO_SERPORT is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_FB=y CONFIG_FB_PXA=y # CONFIG_VGA_CONSOLE is not set diff --git a/arch/arm/configs/mmp2_defconfig b/arch/arm/configs/mmp2_defconfig index f1cb95e..1ced9df 100644 --- a/arch/arm/configs/mmp2_defconfig +++ b/arch/arm/configs/mmp2_defconfig @@ -44,8 +44,9 @@ CONFIG_SMC91X=y # CONFIG_INPUT_KEYBOARD is not set # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/pcm027_defconfig b/arch/arm/configs/pcm027_defconfig index 2f136c3..1280128 100644 --- a/arch/arm/configs/pcm027_defconfig +++ b/arch/arm/configs/pcm027_defconfig @@ -60,8 +60,9 @@ CONFIG_SMC91X=y # CONFIG_INPUT_KEYBOARD is not set # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/pxa168_defconfig b/arch/arm/configs/pxa168_defconfig index 74d7e01..1668dac 100644 --- a/arch/arm/configs/pxa168_defconfig +++ b/arch/arm/configs/pxa168_defconfig @@ -40,8 +40,9 @@ CONFIG_SMC91X=y # CONFIG_INPUT_KEYBOARD is not set # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set # CONFIG_HW_RANDOM is not set # CONFIG_HWMON is not set diff --git a/arch/arm/configs/pxa255-idp_defconfig b/arch/arm/configs/pxa255-idp_defconfig index 917a070..399a706 100644 --- a/arch/arm/configs/pxa255-idp_defconfig +++ b/arch/arm/configs/pxa255-idp_defconfig @@ -35,8 +35,9 @@ CONFIG_SMC91X=y CONFIG_INPUT_EVDEV=y # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO_SERPORT is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_FB=y CONFIG_FB_PXA=y # CONFIG_VGA_CONSOLE is not set diff --git a/arch/arm/configs/pxa3xx_defconfig b/arch/arm/configs/pxa3xx_defconfig index 60e3138..7c3e052 100644 --- a/arch/arm/configs/pxa3xx_defconfig +++ b/arch/arm/configs/pxa3xx_defconfig @@ -56,8 +56,9 @@ CONFIG_KEYBOARD_PXA27x=y CONFIG_KEYBOARD_PXA930_ROTARY=y CONFIG_MOUSE_PXA930_TRKBALL=y CONFIG_INPUT_TOUCHSCREEN=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set # CONFIG_HW_RANDOM is not set CONFIG_I2C=y diff --git a/arch/arm/configs/pxa910_defconfig b/arch/arm/configs/pxa910_defconfig index 3bb7771..cdacfcb 100644 --- a/arch/arm/configs/pxa910_defconfig +++ b/arch/arm/configs/pxa910_defconfig @@ -40,8 +40,9 @@ CONFIG_SMC91X=y # CONFIG_INPUT_KEYBOARD is not set # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_SPI=y CONFIG_FB=y CONFIG_MMP_DISP=y diff --git a/arch/arm/configs/raumfeld_defconfig b/arch/arm/configs/raumfeld_defconfig index f7caa90..f1e16f2 100644 --- a/arch/arm/configs/raumfeld_defconfig +++ b/arch/arm/configs/raumfeld_defconfig @@ -67,8 +67,9 @@ CONFIG_INPUT_TOUCHSCREEN=y CONFIG_TOUCHSCREEN_EETI=m CONFIG_INPUT_MISC=y CONFIG_INPUT_GPIO_ROTARY_ENCODER=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_HW_RANDOM=y CONFIG_I2C=y CONFIG_I2C_CHARDEV=y diff --git a/arch/arm/configs/spitz_defconfig b/arch/arm/configs/spitz_defconfig index 2e0419d..b6efcf5 100644 --- a/arch/arm/configs/spitz_defconfig +++ b/arch/arm/configs/spitz_defconfig @@ -128,10 +128,10 @@ CONFIG_TOUCHSCREEN_ADS7846=y CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=m # CONFIG_SERIO is not set -CONFIG_SERIAL_8250=m +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_CS=m CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set CONFIG_SPI=y CONFIG_SPI_PXA2XX=y diff --git a/arch/arm/configs/trizeps4_defconfig b/arch/arm/configs/trizeps4_defconfig index 3162173..453c79c 100644 --- a/arch/arm/configs/trizeps4_defconfig +++ b/arch/arm/configs/trizeps4_defconfig @@ -132,8 +132,9 @@ CONFIG_INPUT_TOUCHSCREEN=y CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=m CONFIG_SERIO_LIBPS2=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_HW_RANDOM=y CONFIG_I2C=y CONFIG_I2C_CHARDEV=y diff --git a/arch/arm/configs/viper_defconfig b/arch/arm/configs/viper_defconfig index d36e0d3..4efac06 100644 --- a/arch/arm/configs/viper_defconfig +++ b/arch/arm/configs/viper_defconfig @@ -101,11 +101,11 @@ CONFIG_INPUT_MISC=y CONFIG_INPUT_UINPUT=m # CONFIG_CONSOLE_TRANSLATIONS is not set # CONFIG_VT_CONSOLE is not set -CONFIG_SERIAL_8250=m +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_NR_UARTS=5 CONFIG_SERIAL_8250_RUNTIME_UARTS=5 CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set CONFIG_I2C=y CONFIG_I2C_CHARDEV=y diff --git a/arch/arm/configs/xcep_defconfig b/arch/arm/configs/xcep_defconfig index 721832f..b67aeaf 100644 --- a/arch/arm/configs/xcep_defconfig +++ b/arch/arm/configs/xcep_defconfig @@ -60,8 +60,9 @@ CONFIG_NET_ETHERNET=y # CONFIG_INPUT_MOUSE is not set # CONFIG_SERIO is not set # CONFIG_DEVKMEM is not set +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_PXA=y -CONFIG_SERIAL_PXA_CONSOLE=y # CONFIG_LEGACY_PTYS is not set # CONFIG_HW_RANDOM is not set CONFIG_I2C=m diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c new file mode 100644 index 0000000..88ae73c --- /dev/null +++ b/drivers/tty/serial/8250/8250_pxa.c @@ -0,0 +1,189 @@ +/* + * drivers/tty/serial/8250/8250_pxa.c -- driver for PXA on-board UARTS + * Copyright: (C) 2013 Sergei Ianovich <ynvich@xxxxxxxxx> + * + * replaces drivers/serial/pxa.c by Nicolas Pitre + * Created: Feb 20, 2003 + * Copyright: (C) 2003 Monta Vista Software, Inc. + * + * Based on drivers/serial/8250.c by Russell King. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/device.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/serial_8250.h> +#include <linux/serial_core.h> +#include <linux/serial_reg.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/pm_runtime.h> + +#include "8250.h" + +struct pxa8250_data { + int line; + struct clk *clk; +}; + +#ifdef CONFIG_PM +static int serial_pxa_suspend(struct device *dev) +{ + struct pxa8250_data *data = dev_get_drvdata(dev); + + serial8250_suspend_port(data->line); + + return 0; +} + +static int serial_pxa_resume(struct device *dev) +{ + struct pxa8250_data *data = dev_get_drvdata(dev); + + serial8250_resume_port(data->line); + + return 0; +} + +static const struct dev_pm_ops serial_pxa_pm_ops = { + .suspend = serial_pxa_suspend, + .resume = serial_pxa_resume, +}; +#endif + +static struct of_device_id serial_pxa_dt_ids[] = { + { .compatible = "mrvl,pxa-uart", }, + { .compatible = "mrvl,mmp-uart", }, + {} +}; +MODULE_DEVICE_TABLE(of, serial_pxa_dt_ids); + +/* Uart divisor latch write */ +static void serial_pxa_dl_write(struct uart_8250_port *up, int value) +{ + unsigned int dll; + + serial_out(up, UART_DLL, value & 0xff); + /* + * work around Erratum #74 according to Marvel(R) PXA270M Processor + * Specification Update (April 19, 2010) + */ + dll = serial_in(up, UART_DLL); + WARN_ON(dll != (value & 0xff)); + + serial_out(up, UART_DLM, value >> 8 & 0xff); +} + + +static void serial_pxa_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ + struct pxa8250_data *data = port->private_data; + + if (!state) + clk_prepare_enable(data->clk); + else + clk_disable_unprepare(data->clk); +} + +static int serial_pxa_probe(struct platform_device *pdev) +{ + struct uart_8250_port uart = {}; + struct pxa8250_data *data; + struct resource *mmres, *irqres; + int ret; + + mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!mmres || !irqres) + return -ENODEV; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(data->clk)) { + ret = PTR_ERR(data->clk); + goto err_free; + } + + ret = clk_prepare(data->clk); + if (ret) + goto err_free_clk; + + uart.port.type = PORT_XSCALE; + uart.port.iotype = UPIO_MEM32; + uart.port.mapbase = mmres->start; + uart.port.regshift = 2; + uart.port.irq = irqres->start; + uart.port.fifosize = 64; + uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST; + uart.port.dev = &pdev->dev; + uart.port.uartclk = clk_get_rate(data->clk); + uart.port.pm = serial_pxa_pm; + uart.port.private_data = data; + uart.dl_write = serial_pxa_dl_write; + + ret = serial8250_register_8250_port(&uart); + if (ret < 0) + goto err_clk; + + data->line = ret; + + platform_set_drvdata(pdev, data); + + return 0; + + err_clk: + clk_unprepare(data->clk); + err_free_clk: + devm_clk_put(&pdev->dev, data->clk); + err_free: + devm_kfree(&pdev->dev, data); + return ret; +} + +static int serial_pxa_remove(struct platform_device *pdev) +{ + struct pxa8250_data *data = platform_get_drvdata(pdev); + + serial8250_unregister_port(data->line); + + clk_unprepare(data->clk); + devm_clk_put(&pdev->dev, data->clk); + devm_kfree(&pdev->dev, data); + + return 0; +} + +static struct platform_driver serial_pxa_driver = { + .probe = serial_pxa_probe, + .remove = serial_pxa_remove, + + .driver = { + .name = "pxa2xx-uart", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &serial_pxa_pm_ops, +#endif + .of_match_table = serial_pxa_dt_ids, + }, +}; + +module_platform_driver(serial_pxa_driver); + +MODULE_AUTHOR("Sergei Ianovich"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pxa2xx-uart"); diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 2332991..81bd7c9 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -302,3 +302,12 @@ config SERIAL_8250_RT288X If you have a Ralink RT288x/RT305x SoC based board and want to use the serial port, say Y to this option. The driver can handle up to 2 serial ports. If unsure, say N. + +config SERIAL_PXA + tristate "PXA serial port support" + depends on SERIAL_8250 && (ARCH_PXA || ARCH_MMP) + help + If you have a machine based on an Intel XScale PXA2xx CPU you + can enable its onboard serial ports by enabling this option. + + If you choose M here, the module name will be 8250_pxa. diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index 36d68d0..b7d1b61 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o obj-$(CONFIG_SERIAL_8250_DW) += 8250_dw.o obj-$(CONFIG_SERIAL_8250_EM) += 8250_em.o +obj-$(CONFIG_SERIAL_PXA) += 8250_pxa.o diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index a3817ab..2ad7184b 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -396,29 +396,6 @@ config SERIAL_MPSC_CONSOLE help Say Y here if you want to support a serial console on a Marvell MPSC. -config SERIAL_PXA - bool "PXA serial port support" - depends on ARCH_PXA || ARCH_MMP - select SERIAL_CORE - help - If you have a machine based on an Intel XScale PXA2xx CPU you - can enable its onboard serial ports by enabling this option. - -config SERIAL_PXA_CONSOLE - bool "Console on PXA serial port" - depends on SERIAL_PXA - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the Intel XScale PXA - CPU you can make it the console by answering Y to this option. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttySA0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - config SERIAL_SA1100 bool "SA1100 serial port support" depends on ARCH_SA1100 diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 3068c77..4ac337b 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -20,7 +20,6 @@ obj-$(CONFIG_SERIAL_8250) += 8250/ obj-$(CONFIG_SERIAL_AMBA_PL010) += amba-pl010.o obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o -obj-$(CONFIG_SERIAL_PXA) += pxa.o obj-$(CONFIG_SERIAL_PNX8XXX) += pnx8xxx_uart.o obj-$(CONFIG_SERIAL_SA1100) += sa1100.o obj-$(CONFIG_SERIAL_BCM63XX) += bcm63xx_uart.o diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c deleted file mode 100644 index f9f20f3..0000000 --- a/drivers/tty/serial/pxa.c +++ /dev/null @@ -1,971 +0,0 @@ -/* - * Based on drivers/serial/8250.c by Russell King. - * - * Author: Nicolas Pitre - * Created: Feb 20, 2003 - * Copyright: (C) 2003 Monta Vista Software, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * Note 1: This driver is made separate from the already too overloaded - * 8250.c because it needs some kirks of its own and that'll make it - * easier to add DMA support. - * - * Note 2: I'm too sick of device allocation policies for serial ports. - * If someone else wants to request an "official" allocation of major/minor - * for this driver please be my guest. And don't forget that new hardware - * to come from Intel might have more than 3 or 4 of those UARTs. Let's - * hope for a better port registration and dynamic device allocation scheme - * with the serial core maintainer satisfaction to appear soon. - */ - - -#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/serial_reg.h> -#include <linux/circ_buf.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/slab.h> - -#define PXA_NAME_LEN 8 - -struct uart_pxa_port { - struct uart_port port; - unsigned char ier; - unsigned char lcr; - unsigned char mcr; - unsigned int lsr_break_flag; - struct clk *clk; - char name[PXA_NAME_LEN]; -}; - -static inline unsigned int serial_in(struct uart_pxa_port *up, int offset) -{ - offset <<= 2; - return readl(up->port.membase + offset); -} - -static inline void serial_out(struct uart_pxa_port *up, int offset, int value) -{ - offset <<= 2; - writel(value, up->port.membase + offset); -} - -static void serial_pxa_enable_ms(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); -} - -static void serial_pxa_stop_tx(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - if (up->ier & UART_IER_THRI) { - up->ier &= ~UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static void serial_pxa_stop_rx(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static inline void receive_chars(struct uart_pxa_port *up, int *status) -{ - unsigned int ch, flag; - int max_count = 256; - - do { - /* work around Errata #20 according to - * Intel(R) PXA27x Processor Family - * Specification Update (May 2005) - * - * Step 2 - * Disable the Reciever Time Out Interrupt via IER[RTOEI] - */ - up->ier &= ~UART_IER_RTOIE; - serial_out(up, UART_IER, up->ier); - - ch = serial_in(up, UART_RX); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) { - /* - * For statistics only - */ - if (*status & UART_LSR_BI) { - *status &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (*status & UART_LSR_PE) - up->port.icount.parity++; - else if (*status & UART_LSR_FE) - up->port.icount.frame++; - if (*status & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ignored. - */ - *status &= up->port.read_status_mask; - -#ifdef CONFIG_SERIAL_PXA_CONSOLE - if (up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - *status |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } -#endif - if (*status & UART_LSR_BI) { - flag = TTY_BREAK; - } else if (*status & UART_LSR_PE) - flag = TTY_PARITY; - else if (*status & UART_LSR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - - uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag); - - ignore_char: - *status = serial_in(up, UART_LSR); - } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - tty_flip_buffer_push(&up->port.state->port); - - /* work around Errata #20 according to - * Intel(R) PXA27x Processor Family - * Specification Update (May 2005) - * - * Step 6: - * No more data in FIFO: Re-enable RTO interrupt via IER[RTOIE] - */ - up->ier |= UART_IER_RTOIE; - serial_out(up, UART_IER, up->ier); -} - -static void transmit_chars(struct uart_pxa_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - serial_out(up, UART_TX, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - serial_pxa_stop_tx(&up->port); - return; - } - - count = up->port.fifosize / 2; - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - - if (uart_circ_empty(xmit)) - serial_pxa_stop_tx(&up->port); -} - -static void serial_pxa_start_tx(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static inline void check_modem_status(struct uart_pxa_port *up) -{ - int status; - - status = serial_in(up, UART_MSR); - - if ((status & UART_MSR_ANY_DELTA) == 0) - return; - - if (status & UART_MSR_TERI) - up->port.icount.rng++; - if (status & UART_MSR_DDSR) - up->port.icount.dsr++; - if (status & UART_MSR_DDCD) - uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); - if (status & UART_MSR_DCTS) - uart_handle_cts_change(&up->port, status & UART_MSR_CTS); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); -} - -/* - * This handles the interrupt from one port. - */ -static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id) -{ - struct uart_pxa_port *up = dev_id; - unsigned int iir, lsr; - - iir = serial_in(up, UART_IIR); - if (iir & UART_IIR_NO_INT) - return IRQ_NONE; - lsr = serial_in(up, UART_LSR); - if (lsr & UART_LSR_DR) - receive_chars(up, &lsr); - check_modem_status(up); - if (lsr & UART_LSR_THRE) - transmit_chars(up); - return IRQ_HANDLED; -} - -static unsigned int serial_pxa_tx_empty(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int serial_pxa_get_mctrl(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char status; - unsigned int ret; - - status = serial_in(up, UART_MSR); - - ret = 0; - if (status & UART_MSR_DCD) - ret |= TIOCM_CAR; - if (status & UART_MSR_RI) - ret |= TIOCM_RNG; - if (status & UART_MSR_DSR) - ret |= TIOCM_DSR; - if (status & UART_MSR_CTS) - ret |= TIOCM_CTS; - return ret; -} - -static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char mcr = 0; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - mcr |= up->mcr; - - serial_out(up, UART_MCR, mcr); -} - -static void serial_pxa_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - up->lcr |= UART_LCR_SBC; - else - up->lcr &= ~UART_LCR_SBC; - serial_out(up, UART_LCR, up->lcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static int serial_pxa_startup(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - int retval; - - if (port->line == 3) /* HWUART */ - up->mcr |= UART_MCR_AFE; - else - up->mcr = 0; - - up->port.uartclk = clk_get_rate(up->clk); - - /* - * Allocate the IRQ - */ - retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up); - if (retval) - return retval; - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); - - /* - * Clear the interrupt registers. - */ - (void) serial_in(up, UART_LSR); - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - /* - * Now, initialize the UART - */ - serial_out(up, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irqsave(&up->port.lock, flags); - up->port.mctrl |= TIOCM_OUT2; - serial_pxa_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - */ - up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE; - serial_out(up, UART_IER, up->ier); - - /* - * And clear the interrupt registers again for luck. - */ - (void) serial_in(up, UART_LSR); - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - return 0; -} - -static void serial_pxa_shutdown(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - - free_irq(up->port.irq, up); - - /* - * Disable interrupts from this port - */ - up->ier = 0; - serial_out(up, UART_IER, 0); - - spin_lock_irqsave(&up->port.lock, flags); - up->port.mctrl &= ~TIOCM_OUT2; - serial_pxa_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Disable break condition and FIFOs - */ - serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); -} - -static void -serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char cval, fcr = 0; - unsigned long flags; - unsigned int baud, quot; - unsigned int dll; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cval = UART_LCR_WLEN5; - break; - case CS6: - cval = UART_LCR_WLEN6; - break; - case CS7: - cval = UART_LCR_WLEN7; - break; - default: - case CS8: - cval = UART_LCR_WLEN8; - break; - } - - if (termios->c_cflag & CSTOPB) - cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(termios->c_cflag & PARODD)) - cval |= UART_LCR_EPAR; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - if ((up->port.uartclk / quot) < (2400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1; - else if ((up->port.uartclk / quot) < (230400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8; - else - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32; - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Ensure the port will be enabled. - * This is required especially for serial console. - */ - up->ier |= UART_IER_UUE; - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characters to ignore - */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * CTS flow control flag and modem status interrupts - */ - up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->ier |= UART_IER_MSI; - - serial_out(up, UART_IER, up->ier); - - if (termios->c_cflag & CRTSCTS) - up->mcr |= UART_MCR_AFE; - else - up->mcr &= ~UART_MCR_AFE; - - serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */ - serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ - - /* - * work around Errata #75 according to Intel(R) PXA27x Processor Family - * Specification Update (Nov 2005) - */ - dll = serial_in(up, UART_DLL); - WARN_ON(dll != (quot & 0xff)); - - serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ - serial_out(up, UART_LCR, cval); /* reset DLAB */ - up->lcr = cval; /* Save LCR */ - serial_pxa_set_mctrl(&up->port, up->port.mctrl); - serial_out(up, UART_FCR, fcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void -serial_pxa_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - if (!state) - clk_prepare_enable(up->clk); - else - clk_disable_unprepare(up->clk); -} - -static void serial_pxa_release_port(struct uart_port *port) -{ -} - -static int serial_pxa_request_port(struct uart_port *port) -{ - return 0; -} - -static void serial_pxa_config_port(struct uart_port *port, int flags) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - up->port.type = PORT_PXA; -} - -static int -serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - /* we don't want the core code to modify any port params */ - return -EINVAL; -} - -static const char * -serial_pxa_type(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - return up->name; -} - -static struct uart_pxa_port *serial_pxa_ports[4]; -static struct uart_driver serial_pxa_reg; - -#ifdef CONFIG_SERIAL_PXA_CONSOLE - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -/* - * Wait for transmitter & holding register to empty - */ -static inline void wait_for_xmitr(struct uart_pxa_port *up) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = serial_in(up, UART_LSR); - - if (status & UART_LSR_BI) - up->lsr_break_flag = UART_LSR_BI; - - if (--tmout == 0) - break; - udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout && - ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) - udelay(1); - } -} - -static void serial_pxa_console_putchar(struct uart_port *port, int ch) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void -serial_pxa_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_pxa_port *up = serial_pxa_ports[co->index]; - unsigned int ier; - unsigned long flags; - int locked = 1; - - clk_enable(up->clk); - local_irq_save(flags); - if (up->port.sysrq) - locked = 0; - else if (oops_in_progress) - locked = spin_trylock(&up->port.lock); - else - spin_lock(&up->port.lock); - - /* - * First save the IER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, UART_IER_UUE); - - uart_console_write(&up->port, s, count, serial_pxa_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); - clk_disable(up->clk); - -} - -#ifdef CONFIG_CONSOLE_POLL -/* - * Console polling routines for writing and reading from the uart while - * in an interrupt or debug context. - */ - -static int serial_pxa_get_poll_char(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char lsr = serial_in(up, UART_LSR); - - while (!(lsr & UART_LSR_DR)) - lsr = serial_in(up, UART_LSR); - - return serial_in(up, UART_RX); -} - - -static void serial_pxa_put_poll_char(struct uart_port *port, - unsigned char c) -{ - unsigned int ier; - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - /* - * First save the IER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, UART_IER_UUE); - - wait_for_xmitr(up); - /* - * Send the character out. - * If a LF, also do CR... - */ - serial_out(up, UART_TX, c); - if (c == 10) { - wait_for_xmitr(up); - serial_out(up, UART_TX, 13); - } - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); -} - -#endif /* CONFIG_CONSOLE_POLL */ - -static int __init -serial_pxa_console_setup(struct console *co, char *options) -{ - struct uart_pxa_port *up; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index == -1 || co->index >= serial_pxa_reg.nr) - co->index = 0; - up = serial_pxa_ports[co->index]; - if (!up) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&up->port, co, baud, parity, bits, flow); -} - -static struct console serial_pxa_console = { - .name = "ttyS", - .write = serial_pxa_console_write, - .device = uart_console_device, - .setup = serial_pxa_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &serial_pxa_reg, -}; - -#define PXA_CONSOLE &serial_pxa_console -#else -#define PXA_CONSOLE NULL -#endif - -static struct uart_ops serial_pxa_pops = { - .tx_empty = serial_pxa_tx_empty, - .set_mctrl = serial_pxa_set_mctrl, - .get_mctrl = serial_pxa_get_mctrl, - .stop_tx = serial_pxa_stop_tx, - .start_tx = serial_pxa_start_tx, - .stop_rx = serial_pxa_stop_rx, - .enable_ms = serial_pxa_enable_ms, - .break_ctl = serial_pxa_break_ctl, - .startup = serial_pxa_startup, - .shutdown = serial_pxa_shutdown, - .set_termios = serial_pxa_set_termios, - .pm = serial_pxa_pm, - .type = serial_pxa_type, - .release_port = serial_pxa_release_port, - .request_port = serial_pxa_request_port, - .config_port = serial_pxa_config_port, - .verify_port = serial_pxa_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = serial_pxa_get_poll_char, - .poll_put_char = serial_pxa_put_poll_char, -#endif -}; - -static struct uart_driver serial_pxa_reg = { - .owner = THIS_MODULE, - .driver_name = "PXA serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = 4, - .cons = PXA_CONSOLE, -}; - -#ifdef CONFIG_PM -static int serial_pxa_suspend(struct device *dev) -{ - struct uart_pxa_port *sport = dev_get_drvdata(dev); - - if (sport) - uart_suspend_port(&serial_pxa_reg, &sport->port); - - return 0; -} - -static int serial_pxa_resume(struct device *dev) -{ - struct uart_pxa_port *sport = dev_get_drvdata(dev); - - if (sport) - uart_resume_port(&serial_pxa_reg, &sport->port); - - return 0; -} - -static const struct dev_pm_ops serial_pxa_pm_ops = { - .suspend = serial_pxa_suspend, - .resume = serial_pxa_resume, -}; -#endif - -static struct of_device_id serial_pxa_dt_ids[] = { - { .compatible = "mrvl,pxa-uart", }, - { .compatible = "mrvl,mmp-uart", }, - {} -}; -MODULE_DEVICE_TABLE(of, serial_pxa_dt_ids); - -static int serial_pxa_probe_dt(struct platform_device *pdev, - struct uart_pxa_port *sport) -{ - struct device_node *np = pdev->dev.of_node; - int ret; - - if (!np) - return 1; - - ret = of_alias_get_id(np, "serial"); - if (ret < 0) { - dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret); - return ret; - } - sport->port.line = ret; - return 0; -} - -static int serial_pxa_probe(struct platform_device *dev) -{ - struct uart_pxa_port *sport; - struct resource *mmres, *irqres; - int ret; - - mmres = platform_get_resource(dev, IORESOURCE_MEM, 0); - irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0); - if (!mmres || !irqres) - return -ENODEV; - - sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL); - if (!sport) - return -ENOMEM; - - sport->clk = clk_get(&dev->dev, NULL); - if (IS_ERR(sport->clk)) { - ret = PTR_ERR(sport->clk); - goto err_free; - } - - ret = clk_prepare(sport->clk); - if (ret) { - clk_put(sport->clk); - goto err_free; - } - - sport->port.type = PORT_PXA; - sport->port.iotype = UPIO_MEM; - sport->port.mapbase = mmres->start; - sport->port.irq = irqres->start; - sport->port.fifosize = 64; - sport->port.ops = &serial_pxa_pops; - sport->port.dev = &dev->dev; - sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; - sport->port.uartclk = clk_get_rate(sport->clk); - - ret = serial_pxa_probe_dt(dev, sport); - if (ret > 0) - sport->port.line = dev->id; - else if (ret < 0) - goto err_clk; - snprintf(sport->name, PXA_NAME_LEN - 1, "UART%d", sport->port.line + 1); - - sport->port.membase = ioremap(mmres->start, resource_size(mmres)); - if (!sport->port.membase) { - ret = -ENOMEM; - goto err_clk; - } - - serial_pxa_ports[sport->port.line] = sport; - - uart_add_one_port(&serial_pxa_reg, &sport->port); - platform_set_drvdata(dev, sport); - - return 0; - - err_clk: - clk_unprepare(sport->clk); - clk_put(sport->clk); - err_free: - kfree(sport); - return ret; -} - -static int serial_pxa_remove(struct platform_device *dev) -{ - struct uart_pxa_port *sport = platform_get_drvdata(dev); - - uart_remove_one_port(&serial_pxa_reg, &sport->port); - - clk_unprepare(sport->clk); - clk_put(sport->clk); - kfree(sport); - - return 0; -} - -static struct platform_driver serial_pxa_driver = { - .probe = serial_pxa_probe, - .remove = serial_pxa_remove, - - .driver = { - .name = "pxa2xx-uart", - .owner = THIS_MODULE, -#ifdef CONFIG_PM - .pm = &serial_pxa_pm_ops, -#endif - .of_match_table = serial_pxa_dt_ids, - }, -}; - -static int __init serial_pxa_init(void) -{ - int ret; - - ret = uart_register_driver(&serial_pxa_reg); - if (ret != 0) - return ret; - - ret = platform_driver_register(&serial_pxa_driver); - if (ret != 0) - uart_unregister_driver(&serial_pxa_reg); - - return ret; -} - -static void __exit serial_pxa_exit(void) -{ - platform_driver_unregister(&serial_pxa_driver); - uart_unregister_driver(&serial_pxa_reg); -} - -module_init(serial_pxa_init); -module_exit(serial_pxa_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pxa2xx-uart"); -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html