LoCoMo has some special handling for TFT screens attached to Collie and Poodle. Implement that as a separate driver.
Signed-off-by: Dmitry Eremin-Solenikov <[email protected]> --- drivers/video/backlight/Kconfig | 8 ++ drivers/video/backlight/Makefile | 1 + drivers/video/backlight/locomo_lcd.c | 224 +++++++++++++++++++++++++++++++++++ 3 files changed, 233 insertions(+) create mode 100644 drivers/video/backlight/locomo_lcd.c diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 03b77b33..bc5c671 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -48,6 +48,14 @@ config LCD_LMS283GF05 SPI driver for Samsung LMS283GF05. This provides basic support for powering the LCD up/down through a sysfs interface. +config LCD_LOCOMO + tristate "Sharp LOCOMO LCD Driver" + depends on MFD_LOCOMO + default y + help + If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to + enable the LCD driver. + config LCD_LTV350QV tristate "Samsung LTV350QV LCD Panel" depends on SPI_MASTER diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 2a61b7e..b2580e7 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_LCD_ILI922X) += ili922x.o obj-$(CONFIG_LCD_ILI9320) += ili9320.o obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o obj-$(CONFIG_LCD_LD9040) += ld9040.o +obj-$(CONFIG_LCD_LOCOMO) += locomo_lcd.o obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o obj-$(CONFIG_LCD_LMS501KF03) += lms501kf03.o obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o diff --git a/drivers/video/backlight/locomo_lcd.c b/drivers/video/backlight/locomo_lcd.c new file mode 100644 index 0000000..245efb8 --- /dev/null +++ b/drivers/video/backlight/locomo_lcd.c @@ -0,0 +1,224 @@ +/* + * Backlight control code for Sharp Zaurus SL-5500 + * + * Copyright 2005 John Lenz <[email protected]> + * Maintainer: Pavel Machek <[email protected]> (unless John wants to :-) + * GPL v2 + * + * This driver assumes single CPU. That's okay, because collie is + * slightly old hardware, and no one is going to retrofit second CPU to + * old PDA. + */ + +/* LCD power functions */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/lcd.h> +#include <linux/mfd/locomo.h> + +static struct platform_device *locomolcd_dev; +static struct locomo_lcd_platform_data lcd_data; +static bool locomolcd_is_on; +static bool locomolcd_is_suspended; +static void __iomem *locomolcd_regs; +static struct lcd_device *lcd_dev; + +static struct gpio locomo_gpios[] = { + { 0, GPIOF_OUT_INIT_LOW, "LCD VSHA on" }, + { 0, GPIOF_OUT_INIT_LOW, "LCD VSHD on" }, + { 0, GPIOF_OUT_INIT_LOW, "LCD Vee on" }, + { 0, GPIOF_OUT_INIT_LOW, "LCD MOD" }, +}; + +static void locomolcd_on(void) +{ + gpio_set_value(lcd_data.gpio_lcd_vsha_on, 1); + mdelay(2); + + gpio_set_value(lcd_data.gpio_lcd_vshd_on, 1); + mdelay(2); + + locomo_m62332_senddata(locomolcd_dev->dev.parent, lcd_data.comadj, 0); + mdelay(5); + + gpio_set_value(lcd_data.gpio_lcd_vee_on, 1); + mdelay(10); + + /* TFTCRST | CPSOUT=0 | CPSEN */ + writew(0x01, locomolcd_regs + LOCOMO_TC); + + /* Set CPSD */ + writew(6, locomolcd_regs + LOCOMO_CPSD); + + /* TFTCRST | CPSOUT=0 | CPSEN */ + writew((0x04 | 0x01), locomolcd_regs + LOCOMO_TC); + mdelay(10); + + gpio_set_value(lcd_data.gpio_lcd_mod, 1); +} + +static void locomolcd_off(void) +{ + /* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */ + writew(0x06, locomolcd_regs + LOCOMO_TC); + mdelay(1); + + gpio_set_value(lcd_data.gpio_lcd_vsha_on, 0); + mdelay(110); + + gpio_set_value(lcd_data.gpio_lcd_vee_on, 0); + mdelay(700); + + locomo_m62332_senddata(locomolcd_dev->dev.parent, 0, 0); + mdelay(5); + + /* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */ + writew(0, locomolcd_regs + LOCOMO_TC); + gpio_set_value(lcd_data.gpio_lcd_mod, 0); + gpio_set_value(lcd_data.gpio_lcd_vshd_on, 0); +} + +int locomo_lcd_set_power(struct lcd_device *lcd, int power) +{ + dev_dbg(&lcd->dev, "LCD power %d (is %d)\n", power, locomolcd_is_on); + if (power == 0 && !locomolcd_is_on) { + locomolcd_is_on = 1; + locomolcd_on(); + } + if (power != 0 && locomolcd_is_on) { + locomolcd_is_on = 0; + locomolcd_off(); + } + return 0; +} + +static int locomo_lcd_get_power(struct lcd_device *lcd) +{ + return !locomolcd_is_on; +} + +static struct lcd_ops locomo_lcd_ops = { + .set_power = locomo_lcd_set_power, + .get_power = locomo_lcd_get_power, +}; + +#ifdef CONFIG_PM_SLEEP +static int locomolcd_suspend(struct device *dev) +{ + locomolcd_is_suspended = true; + locomolcd_off(); + + return 0; +} + +static int locomolcd_resume(struct device *dev) +{ + locomolcd_is_suspended = false; + + if (locomolcd_is_on) + locomolcd_on(); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(locomolcd_pm, locomolcd_suspend, locomolcd_resume); +#define LOCOMOLCD_PM (&locomolcd_pm) +#else +#define LOCOMOLCD_PM NULL +#endif + +static int locomolcd_probe(struct platform_device *dev) +{ + unsigned long flags; + struct resource *res; + struct locomo_lcd_platform_data *pdata; + int rc; + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + locomolcd_regs = devm_ioremap_resource(&dev->dev, res); + if (!locomolcd_regs) + return -EINVAL; + + pdata = dev_get_platdata(&dev->dev); + if (!pdata) + return -EINVAL; + + lcd_data = *pdata; + + locomo_gpios[0].gpio = lcd_data.gpio_lcd_vsha_on; + locomo_gpios[1].gpio = lcd_data.gpio_lcd_vshd_on; + locomo_gpios[2].gpio = lcd_data.gpio_lcd_vee_on; + locomo_gpios[3].gpio = lcd_data.gpio_lcd_mod; + dev_info(&dev->dev, "GPIOs: %d %d %d %d\n", + locomo_gpios[0].gpio, + locomo_gpios[1].gpio, + locomo_gpios[2].gpio, + locomo_gpios[3].gpio); + + rc = gpio_request_array(locomo_gpios, ARRAY_SIZE(locomo_gpios)); + if (rc) + return rc; + + local_irq_save(flags); + locomolcd_dev = dev; + + locomolcd_is_on = 1; + if (locomolcd_is_on) + locomolcd_on(); + + local_irq_restore(flags); + + lcd_dev = lcd_device_register("locomo", &dev->dev, NULL, + &locomo_lcd_ops); + + return 0; +} + +static int locomolcd_remove(struct platform_device *dev) +{ + unsigned long flags; + + lcd_device_unregister(lcd_dev); + + local_irq_save(flags); + + locomolcd_off(); + locomolcd_dev = NULL; + + local_irq_restore(flags); + + gpio_free_array(locomo_gpios, ARRAY_SIZE(locomo_gpios)); + + return 0; +} + +static void locomolcd_shutdown(struct platform_device *dev) +{ + locomolcd_off(); +} + +static struct platform_driver locomolcd_driver = { + .driver = { + .name = "locomo-lcd", + .owner = THIS_MODULE, + .pm = LOCOMOLCD_PM, + }, + .probe = locomolcd_probe, + .remove = locomolcd_remove, + .shutdown = locomolcd_shutdown, +}; + +module_platform_driver(locomolcd_driver); + +MODULE_AUTHOR("John Lenz <[email protected]>, Pavel Machek <[email protected]>"); +MODULE_DESCRIPTION("Collie LCD driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:locomo-lcd"); -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
