36a95bf5cd
In frontlight support, we should really use values from flash-ROM instead of hardcoding our own. Cleanup includes. Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
/*
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* Backlight control code for Sharp Zaurus SL-5500
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*
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* Copyright 2005 John Lenz <lenz@cs.wisc.edu>
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* Maintainer: Pavel Machek <pavel@suse.cz> (unless John wants to :-)
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* GPL v2
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*
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* This driver assumes single CPU. That's okay, because collie is
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* slightly old hardware, and noone is going to retrofit second CPU to
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* old PDA.
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*/
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/* LCD power functions */
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <asm/hardware/locomo.h>
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#include <asm/irq.h>
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#include <asm/mach/sharpsl_param.h>
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#include <asm/mach-types.h>
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#include "../../../arch/arm/mach-sa1100/generic.h"
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static struct locomo_dev *locomolcd_dev;
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static void locomolcd_on(int comadj)
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{
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locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 1);
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mdelay(2);
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locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 1);
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mdelay(2);
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locomo_m62332_senddata(locomolcd_dev, comadj, 0);
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mdelay(5);
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locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 1);
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mdelay(10);
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/* TFTCRST | CPSOUT=0 | CPSEN */
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locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC);
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/* Set CPSD */
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locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD);
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/* TFTCRST | CPSOUT=0 | CPSEN */
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locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC);
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mdelay(10);
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locomo_gpio_set_dir(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 1);
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}
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static void locomolcd_off(int comadj)
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{
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/* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */
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locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC);
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mdelay(1);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHA_ON, 0);
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mdelay(110);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VEE_ON, 0);
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mdelay(700);
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/* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */
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locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_MOD, 0);
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locomo_gpio_write(locomolcd_dev, LOCOMO_GPIO_LCD_VSHD_ON, 0);
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}
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void locomolcd_power(int on)
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{
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int comadj = sharpsl_param.comadj;
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unsigned long flags;
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local_irq_save(flags);
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if (!locomolcd_dev) {
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local_irq_restore(flags);
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return;
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}
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/* read comadj */
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if (comadj == -1) {
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if (machine_is_poodle())
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comadj = 118;
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if (machine_is_collie())
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comadj = 128;
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}
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if (on)
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locomolcd_on(comadj);
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else
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locomolcd_off(comadj);
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local_irq_restore(flags);
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}
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EXPORT_SYMBOL(locomolcd_power);
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static int poodle_lcd_probe(struct locomo_dev *dev)
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{
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unsigned long flags;
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local_irq_save(flags);
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locomolcd_dev = dev;
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/* the poodle_lcd_power function is called for the first time
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* from fs_initcall, which is before locomo is activated.
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* We need to recall poodle_lcd_power here*/
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#ifdef CONFIG_MACH_POODLE
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locomolcd_power(1);
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#endif
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local_irq_restore(flags);
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return 0;
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}
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static int poodle_lcd_remove(struct locomo_dev *dev)
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{
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unsigned long flags;
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local_irq_save(flags);
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locomolcd_dev = NULL;
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local_irq_restore(flags);
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return 0;
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}
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static struct locomo_driver poodle_lcd_driver = {
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.drv = {
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.name = "locomo-backlight",
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},
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.devid = LOCOMO_DEVID_BACKLIGHT,
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.probe = poodle_lcd_probe,
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.remove = poodle_lcd_remove,
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};
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static int __init poodle_lcd_init(void)
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{
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int ret = locomo_driver_register(&poodle_lcd_driver);
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if (ret) return ret;
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#ifdef CONFIG_SA1100_COLLIE
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sa1100fb_lcd_power = locomolcd_power;
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#endif
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return 0;
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}
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device_initcall(poodle_lcd_init);
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