diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/backlight/Makefile | 1 | ||||
| -rw-r--r-- | drivers/video/backlight/locomolcd.c | 157 |
2 files changed, 158 insertions, 0 deletions
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 9aae884475b..4af321fae39 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -3,3 +3,4 @@ obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o +obj-$(CONFIG_SHARP_LOCOMO) += locomolcd.o diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c new file mode 100644 index 00000000000..ada6e75eb04 --- /dev/null +++ b/drivers/video/backlight/locomolcd.c @@ -0,0 +1,157 @@ +/* + * Backlight control code for Sharp Zaurus SL-5500 + * + * Copyright 2005 John Lenz <lenz@cs.wisc.edu> + * Maintainer: Pavel Machek <pavel@suse.cz> (unless John wants to :-) + * GPL v2 + * + * This driver assumes single CPU. That's okay, because collie is + * slightly old hardware, and noone is going to retrofit second CPU to + * old PDA. + */ + +/* LCD power functions */ +#include <linux/config.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/interrupt.h> + +#include <asm/hardware/locomo.h> +#include <asm/irq.h> + +#ifdef CONFIG_SA1100_COLLIE +#include <asm/arch/collie.h> +#else +#include <asm/arch/poodle.h> +#endif + +extern void (*sa1100fb_lcd_power)(int on); + +static struct locomo_dev *locomolcd_dev; + +static void locomolcd_on(int comadj) +{ + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 1); + mdelay(2); + + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 1); + mdelay(2); + + locomo_m62332_senddata(locomolcd_dev, comadj, 0); + mdelay(5); + + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 1); + mdelay(10); + + /* TFTCRST | CPSOUT=0 | CPSEN */ + locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC); + + /* Set CPSD */ + locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD); + + /* TFTCRST | CPSOUT=0 | CPSEN */ + locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC); + mdelay(10); + + locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 1); +} + +static void locomolcd_off(int comadj) +{ + /* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */ + locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC); + mdelay(1); + + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0); + mdelay(110); + + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0); + mdelay(700); + + /* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */ + locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0); + locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0); +} + +void locomolcd_power(int on) +{ + int comadj = 118; + unsigned long flags; + + local_irq_save(flags); + + if (!locomolcd_dev) { + local_irq_restore(flags); + return; + } + + /* read comadj */ +#ifdef CONFIG_MACH_POODLE + comadj = 118; +#else + comadj = 128; +#endif + + if (on) + locomolcd_on(comadj); + else + locomolcd_off(comadj); + + local_irq_restore(flags); +} +EXPORT_SYMBOL(locomolcd_power); + +static int poodle_lcd_probe(struct locomo_dev *dev) +{ + unsigned long flags; + + local_irq_save(flags); + locomolcd_dev = dev; + + /* the poodle_lcd_power function is called for the first time + * from fs_initcall, which is before locomo is activated. + * We need to recall poodle_lcd_power here*/ +#ifdef CONFIG_MACH_POODLE + locomolcd_power(1); +#endif + local_irq_restore(flags); + return 0; +} + +static int poodle_lcd_remove(struct locomo_dev *dev) +{ + unsigned long flags; + local_irq_save(flags); + locomolcd_dev = NULL; + local_irq_restore(flags); + return 0; +} + +static struct locomo_driver poodle_lcd_driver = { + .drv = { + .name = "locomo-backlight", + }, + .devid = LOCOMO_DEVID_BACKLIGHT, + .probe = poodle_lcd_probe, + .remove = poodle_lcd_remove, +}; + +static int __init poodle_lcd_init(void) +{ + int ret = locomo_driver_register(&poodle_lcd_driver); + if (ret) return ret; + +#ifdef CONFIG_SA1100_COLLIE + sa1100fb_lcd_power = locomolcd_power; +#endif + return 0; +} +device_initcall(poodle_lcd_init); + |