/*
* 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>
#include <asm/mach/sharpsl_param.h>
#include <asm/mach-types.h>
#include "../../../arch/arm/mach-sa1100/generic.h"
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 = sharpsl_param.comadj;
unsigned long flags;
local_irq_save(flags);
if (!locomolcd_dev) {
local_irq_restore(flags);
return;
}
/* read comadj */
if (comadj == -1) {
if (machine_is_poodle())
comadj = 118;
if (machine_is_collie())
comadj = 128;
}
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);
