mirror of https://gitee.com/openkylin/linux.git
289 lines
5.8 KiB
C
289 lines
5.8 KiB
C
/*
|
|
* LCD / Backlight control code for Sharp SL-6000x (tosa)
|
|
*
|
|
* Copyright (c) 2005 Dirk Opfer
|
|
* Copyright (c) 2007,2008 Dmitry Baryshkov
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/lcd.h>
|
|
#include <linux/fb.h>
|
|
|
|
#include <asm/mach/sharpsl_param.h>
|
|
|
|
#include <mach/tosa.h>
|
|
|
|
#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
|
|
|
|
#define TG_REG0_VQV 0x0001
|
|
#define TG_REG0_COLOR 0x0002
|
|
#define TG_REG0_UD 0x0004
|
|
#define TG_REG0_LR 0x0008
|
|
|
|
#define DAC_BASE 0x4e
|
|
|
|
struct tosa_lcd_data {
|
|
struct spi_device *spi;
|
|
struct lcd_device *lcd;
|
|
struct i2c_client *i2c;
|
|
|
|
int lcd_power;
|
|
bool is_vga;
|
|
};
|
|
|
|
static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data)
|
|
{
|
|
u8 buf[1];
|
|
struct spi_message msg;
|
|
struct spi_transfer xfer = {
|
|
.len = 1,
|
|
.cs_change = 1,
|
|
.tx_buf = buf,
|
|
};
|
|
|
|
buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);
|
|
spi_message_init(&msg);
|
|
spi_message_add_tail(&xfer, &msg);
|
|
|
|
return spi_sync(spi, &msg);
|
|
}
|
|
|
|
int tosa_bl_enable(struct spi_device *spi, int enable)
|
|
{
|
|
/* bl_enable GP04=1 otherwise GP04=0*/
|
|
return tosa_tg_send(spi, TG_GPODR2, enable? 0x01 : 0x00);
|
|
}
|
|
EXPORT_SYMBOL(tosa_bl_enable);
|
|
|
|
static void tosa_lcd_tg_init(struct tosa_lcd_data *data)
|
|
{
|
|
/* TG on */
|
|
gpio_set_value(TOSA_GPIO_TG_ON, 0);
|
|
|
|
mdelay(60);
|
|
|
|
/* delayed 0clk TCTL signal for VGA */
|
|
tosa_tg_send(data->spi, TG_TPOSCTL, 0x00);
|
|
/* GPOS0=powercontrol, GPOS1=GPIO, GPOS2=TCTL */
|
|
tosa_tg_send(data->spi, TG_GPOSR, 0x02);
|
|
}
|
|
|
|
static void tosa_lcd_tg_on(struct tosa_lcd_data *data)
|
|
{
|
|
struct spi_device *spi = data->spi;
|
|
int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
|
|
|
|
if (data->is_vga)
|
|
value |= TG_REG0_VQV;
|
|
|
|
tosa_tg_send(spi, TG_PNLCTL, value);
|
|
|
|
/* TG LCD pannel power up */
|
|
tosa_tg_send(spi, TG_PINICTL,0x4);
|
|
mdelay(50);
|
|
|
|
/* TG LCD GVSS */
|
|
tosa_tg_send(spi, TG_PINICTL,0x0);
|
|
|
|
if (!data->i2c) {
|
|
/* after the pannel is powered up the first time, we can access the i2c bus */
|
|
/* so probe for the DAC */
|
|
struct i2c_adapter *adap = i2c_get_adapter(0);
|
|
struct i2c_board_info info = {
|
|
.type = "tosa-bl",
|
|
.addr = DAC_BASE,
|
|
.platform_data = data->spi,
|
|
};
|
|
data->i2c = i2c_new_device(adap, &info);
|
|
}
|
|
}
|
|
|
|
static void tosa_lcd_tg_off(struct tosa_lcd_data *data)
|
|
{
|
|
struct spi_device *spi = data->spi;
|
|
|
|
/* TG LCD VHSA off */
|
|
tosa_tg_send(spi, TG_PINICTL,0x4);
|
|
mdelay(50);
|
|
|
|
/* TG LCD signal off */
|
|
tosa_tg_send(spi, TG_PINICTL,0x6);
|
|
mdelay(50);
|
|
|
|
/* TG Off */
|
|
gpio_set_value(TOSA_GPIO_TG_ON, 1);
|
|
mdelay(100);
|
|
}
|
|
|
|
int tosa_lcd_set_power(struct lcd_device *lcd, int power)
|
|
{
|
|
struct tosa_lcd_data *data = lcd_get_data(lcd);
|
|
|
|
if (POWER_IS_ON(power) && !POWER_IS_ON(data->lcd_power))
|
|
tosa_lcd_tg_on(data);
|
|
|
|
if (!POWER_IS_ON(power) && POWER_IS_ON(data->lcd_power))
|
|
tosa_lcd_tg_off(data);
|
|
|
|
data->lcd_power = power;
|
|
return 0;
|
|
}
|
|
|
|
static int tosa_lcd_get_power(struct lcd_device *lcd)
|
|
{
|
|
struct tosa_lcd_data *data = lcd_get_data(lcd);
|
|
|
|
return data->lcd_power;
|
|
}
|
|
|
|
static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
|
|
{
|
|
struct tosa_lcd_data *data = lcd_get_data(lcd);
|
|
|
|
if (mode->xres == 320 || mode->yres == 320)
|
|
data->is_vga = false;
|
|
else
|
|
data->is_vga = true;
|
|
|
|
if (POWER_IS_ON(data->lcd_power))
|
|
tosa_lcd_tg_on(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct lcd_ops tosa_lcd_ops = {
|
|
.set_power = tosa_lcd_set_power,
|
|
.get_power = tosa_lcd_get_power,
|
|
.set_mode = tosa_lcd_set_mode,
|
|
};
|
|
|
|
static int __devinit tosa_lcd_probe(struct spi_device *spi)
|
|
{
|
|
int ret;
|
|
struct tosa_lcd_data *data;
|
|
|
|
data = devm_kzalloc(&spi->dev, sizeof(struct tosa_lcd_data),
|
|
GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->is_vga = true; /* default to VGA mode */
|
|
|
|
/*
|
|
* bits_per_word cannot be configured in platform data
|
|
*/
|
|
spi->bits_per_word = 8;
|
|
|
|
ret = spi_setup(spi);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->spi = spi;
|
|
dev_set_drvdata(&spi->dev, data);
|
|
|
|
ret = devm_gpio_request(&spi->dev, TOSA_GPIO_TG_ON, "tg #pwr");
|
|
if (ret < 0)
|
|
goto err_gpio_tg;
|
|
|
|
mdelay(60);
|
|
|
|
ret = gpio_direction_output(TOSA_GPIO_TG_ON, 0);
|
|
if (ret < 0)
|
|
goto err_gpio_tg;
|
|
|
|
mdelay(60);
|
|
tosa_lcd_tg_init(data);
|
|
|
|
tosa_lcd_tg_on(data);
|
|
|
|
data->lcd = lcd_device_register("tosa-lcd", &spi->dev, data,
|
|
&tosa_lcd_ops);
|
|
|
|
if (IS_ERR(data->lcd)) {
|
|
ret = PTR_ERR(data->lcd);
|
|
data->lcd = NULL;
|
|
goto err_register;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_register:
|
|
tosa_lcd_tg_off(data);
|
|
err_gpio_tg:
|
|
dev_set_drvdata(&spi->dev, NULL);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit tosa_lcd_remove(struct spi_device *spi)
|
|
{
|
|
struct tosa_lcd_data *data = dev_get_drvdata(&spi->dev);
|
|
|
|
lcd_device_unregister(data->lcd);
|
|
|
|
if (data->i2c)
|
|
i2c_unregister_device(data->i2c);
|
|
|
|
tosa_lcd_tg_off(data);
|
|
|
|
dev_set_drvdata(&spi->dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int tosa_lcd_suspend(struct spi_device *spi, pm_message_t state)
|
|
{
|
|
struct tosa_lcd_data *data = dev_get_drvdata(&spi->dev);
|
|
|
|
tosa_lcd_tg_off(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tosa_lcd_resume(struct spi_device *spi)
|
|
{
|
|
struct tosa_lcd_data *data = dev_get_drvdata(&spi->dev);
|
|
|
|
tosa_lcd_tg_init(data);
|
|
if (POWER_IS_ON(data->lcd_power))
|
|
tosa_lcd_tg_on(data);
|
|
else
|
|
tosa_lcd_tg_off(data);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define tosa_lcd_suspend NULL
|
|
#define tosa_lcd_resume NULL
|
|
#endif
|
|
|
|
static struct spi_driver tosa_lcd_driver = {
|
|
.driver = {
|
|
.name = "tosa-lcd",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tosa_lcd_probe,
|
|
.remove = tosa_lcd_remove,
|
|
.suspend = tosa_lcd_suspend,
|
|
.resume = tosa_lcd_resume,
|
|
};
|
|
|
|
module_spi_driver(tosa_lcd_driver);
|
|
|
|
MODULE_AUTHOR("Dmitry Baryshkov");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
|
|
MODULE_ALIAS("spi:tosa-lcd");
|