linux-imx

/*

 * Backlight control code for Sharp Zaurus SL-5500

 *

 * Copyright 2005 John Lenz <lenz@cs.wisc.edu>

 * Maintainer: Pavel Machek <pavel@ucw.cz> (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/delay.h>

#include <linux/device.h>

#include <linux/interrupt.h>

#include <linux/fb.h>

#include <linux/backlight.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 backlight_device *locomolcd_bl_device;

static struct locomo_dev *locomolcd_dev;

static unsigned long locomolcd_flags;

#define LOCOMOLCD_SUSPENDED     0x01

​

static void locomolcd_on(int comadj)

{

    locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);

    locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 1);

    mdelay(2);

​

    locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);

    locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 1);

    mdelay(2);

​

    locomo_m62332_senddata(locomolcd_dev, comadj, 0);

    mdelay(5);

​

    locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);

    locomo_gpio_write(locomolcd_dev->dev.parent, 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->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);

    locomo_gpio_write(locomolcd_dev->dev.parent, 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->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);

    mdelay(110);

​

    locomo_gpio_write(locomolcd_dev->dev.parent, 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->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);

    locomo_gpio_write(locomolcd_dev->dev.parent, 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;