437 строки
9.5 KiB
C
437 строки
9.5 KiB
C
/*
|
|
* lms501kf03 TFT LCD panel driver.
|
|
*
|
|
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
|
|
* Author: Jingoo Han <jg1.han@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/backlight.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/lcd.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/wait.h>
|
|
|
|
#define COMMAND_ONLY 0x00
|
|
#define DATA_ONLY 0x01
|
|
|
|
struct lms501kf03 {
|
|
struct device *dev;
|
|
struct spi_device *spi;
|
|
unsigned int power;
|
|
struct lcd_device *ld;
|
|
struct lcd_platform_data *lcd_pd;
|
|
};
|
|
|
|
static const unsigned char seq_password[] = {
|
|
0xb9, 0xff, 0x83, 0x69,
|
|
};
|
|
|
|
static const unsigned char seq_power[] = {
|
|
0xb1, 0x01, 0x00, 0x34, 0x06, 0x00, 0x14, 0x14, 0x20, 0x28,
|
|
0x12, 0x12, 0x17, 0x0a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
|
|
};
|
|
|
|
static const unsigned char seq_display[] = {
|
|
0xb2, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, 0xff, 0x00, 0x00,
|
|
0x00, 0x00, 0x03, 0x03, 0x00, 0x01,
|
|
};
|
|
|
|
static const unsigned char seq_rgb_if[] = {
|
|
0xb3, 0x09,
|
|
};
|
|
|
|
static const unsigned char seq_display_inv[] = {
|
|
0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06,
|
|
};
|
|
|
|
static const unsigned char seq_vcom[] = {
|
|
0xb6, 0x4c, 0x2e,
|
|
};
|
|
|
|
static const unsigned char seq_gate[] = {
|
|
0xd5, 0x00, 0x05, 0x03, 0x29, 0x01, 0x07, 0x17, 0x68, 0x13,
|
|
0x37, 0x20, 0x31, 0x8a, 0x46, 0x9b, 0x57, 0x13, 0x02, 0x75,
|
|
0xb9, 0x64, 0xa8, 0x07, 0x0f, 0x04, 0x07,
|
|
};
|
|
|
|
static const unsigned char seq_panel[] = {
|
|
0xcc, 0x02,
|
|
};
|
|
|
|
static const unsigned char seq_col_mod[] = {
|
|
0x3a, 0x77,
|
|
};
|
|
|
|
static const unsigned char seq_w_gamma[] = {
|
|
0xe0, 0x00, 0x04, 0x09, 0x0f, 0x1f, 0x3f, 0x1f, 0x2f, 0x0a,
|
|
0x0f, 0x10, 0x16, 0x18, 0x16, 0x17, 0x0d, 0x15, 0x00, 0x04,
|
|
0x09, 0x0f, 0x38, 0x3f, 0x20, 0x39, 0x0a, 0x0f, 0x10, 0x16,
|
|
0x18, 0x16, 0x17, 0x0d, 0x15,
|
|
};
|
|
|
|
static const unsigned char seq_rgb_gamma[] = {
|
|
0xc1, 0x01, 0x03, 0x07, 0x0f, 0x1a, 0x22, 0x2c, 0x33, 0x3c,
|
|
0x46, 0x4f, 0x58, 0x60, 0x69, 0x71, 0x79, 0x82, 0x89, 0x92,
|
|
0x9a, 0xa1, 0xa9, 0xb1, 0xb9, 0xc1, 0xc9, 0xcf, 0xd6, 0xde,
|
|
0xe5, 0xec, 0xf3, 0xf9, 0xff, 0xdd, 0x39, 0x07, 0x1c, 0xcb,
|
|
0xab, 0x5f, 0x49, 0x80, 0x03, 0x07, 0x0f, 0x19, 0x20, 0x2a,
|
|
0x31, 0x39, 0x42, 0x4b, 0x53, 0x5b, 0x63, 0x6b, 0x73, 0x7b,
|
|
0x83, 0x8a, 0x92, 0x9b, 0xa2, 0xaa, 0xb2, 0xba, 0xc2, 0xca,
|
|
0xd0, 0xd8, 0xe1, 0xe8, 0xf0, 0xf8, 0xff, 0xf7, 0xd8, 0xbe,
|
|
0xa7, 0x39, 0x40, 0x85, 0x8c, 0xc0, 0x04, 0x07, 0x0c, 0x17,
|
|
0x1c, 0x23, 0x2b, 0x34, 0x3b, 0x43, 0x4c, 0x54, 0x5b, 0x63,
|
|
0x6a, 0x73, 0x7a, 0x82, 0x8a, 0x91, 0x98, 0xa1, 0xa8, 0xb0,
|
|
0xb7, 0xc1, 0xc9, 0xcf, 0xd9, 0xe3, 0xea, 0xf4, 0xff, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
};
|
|
|
|
static const unsigned char seq_up_dn[] = {
|
|
0x36, 0x10,
|
|
};
|
|
|
|
static const unsigned char seq_sleep_in[] = {
|
|
0x10,
|
|
};
|
|
|
|
static const unsigned char seq_sleep_out[] = {
|
|
0x11,
|
|
};
|
|
|
|
static const unsigned char seq_display_on[] = {
|
|
0x29,
|
|
};
|
|
|
|
static const unsigned char seq_display_off[] = {
|
|
0x10,
|
|
};
|
|
|
|
static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)
|
|
{
|
|
u16 buf[1];
|
|
struct spi_message msg;
|
|
|
|
struct spi_transfer xfer = {
|
|
.len = 2,
|
|
.tx_buf = buf,
|
|
};
|
|
|
|
buf[0] = (addr << 8) | data;
|
|
|
|
spi_message_init(&msg);
|
|
spi_message_add_tail(&xfer, &msg);
|
|
|
|
return spi_sync(lcd->spi, &msg);
|
|
}
|
|
|
|
static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,
|
|
unsigned char command)
|
|
{
|
|
return lms501kf03_spi_write_byte(lcd, address, command);
|
|
}
|
|
|
|
static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,
|
|
const unsigned char *wbuf,
|
|
unsigned int len)
|
|
{
|
|
int ret = 0, i = 0;
|
|
|
|
while (i < len) {
|
|
if (i == 0)
|
|
ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);
|
|
else
|
|
ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);
|
|
if (ret)
|
|
break;
|
|
i += 1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int lms501kf03_ldi_init(struct lms501kf03 *lcd)
|
|
{
|
|
int ret, i;
|
|
static const unsigned char *init_seq[] = {
|
|
seq_password,
|
|
seq_power,
|
|
seq_display,
|
|
seq_rgb_if,
|
|
seq_display_inv,
|
|
seq_vcom,
|
|
seq_gate,
|
|
seq_panel,
|
|
seq_col_mod,
|
|
seq_w_gamma,
|
|
seq_rgb_gamma,
|
|
seq_sleep_out,
|
|
};
|
|
|
|
static const unsigned int size_seq[] = {
|
|
ARRAY_SIZE(seq_password),
|
|
ARRAY_SIZE(seq_power),
|
|
ARRAY_SIZE(seq_display),
|
|
ARRAY_SIZE(seq_rgb_if),
|
|
ARRAY_SIZE(seq_display_inv),
|
|
ARRAY_SIZE(seq_vcom),
|
|
ARRAY_SIZE(seq_gate),
|
|
ARRAY_SIZE(seq_panel),
|
|
ARRAY_SIZE(seq_col_mod),
|
|
ARRAY_SIZE(seq_w_gamma),
|
|
ARRAY_SIZE(seq_rgb_gamma),
|
|
ARRAY_SIZE(seq_sleep_out),
|
|
};
|
|
|
|
for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
|
|
ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],
|
|
size_seq[i]);
|
|
if (ret)
|
|
break;
|
|
}
|
|
/*
|
|
* According to the datasheet, 120ms delay time is required.
|
|
* After sleep out sequence, command is blocked for 120ms.
|
|
* Thus, LDI should wait for 120ms.
|
|
*/
|
|
msleep(120);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)
|
|
{
|
|
return lms501kf03_panel_send_sequence(lcd, seq_display_on,
|
|
ARRAY_SIZE(seq_display_on));
|
|
}
|
|
|
|
static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)
|
|
{
|
|
return lms501kf03_panel_send_sequence(lcd, seq_display_off,
|
|
ARRAY_SIZE(seq_display_off));
|
|
}
|
|
|
|
static int lms501kf03_power_is_on(int power)
|
|
{
|
|
return (power) <= FB_BLANK_NORMAL;
|
|
}
|
|
|
|
static int lms501kf03_power_on(struct lms501kf03 *lcd)
|
|
{
|
|
int ret = 0;
|
|
struct lcd_platform_data *pd;
|
|
|
|
pd = lcd->lcd_pd;
|
|
|
|
if (!pd->power_on) {
|
|
dev_err(lcd->dev, "power_on is NULL.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pd->power_on(lcd->ld, 1);
|
|
msleep(pd->power_on_delay);
|
|
|
|
if (!pd->reset) {
|
|
dev_err(lcd->dev, "reset is NULL.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pd->reset(lcd->ld);
|
|
msleep(pd->reset_delay);
|
|
|
|
ret = lms501kf03_ldi_init(lcd);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "failed to initialize ldi.\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = lms501kf03_ldi_enable(lcd);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "failed to enable ldi.\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lms501kf03_power_off(struct lms501kf03 *lcd)
|
|
{
|
|
int ret = 0;
|
|
struct lcd_platform_data *pd;
|
|
|
|
pd = lcd->lcd_pd;
|
|
|
|
ret = lms501kf03_ldi_disable(lcd);
|
|
if (ret) {
|
|
dev_err(lcd->dev, "lcd setting failed.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
msleep(pd->power_off_delay);
|
|
|
|
pd->power_on(lcd->ld, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lms501kf03_power(struct lms501kf03 *lcd, int power)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (lms501kf03_power_is_on(power) &&
|
|
!lms501kf03_power_is_on(lcd->power))
|
|
ret = lms501kf03_power_on(lcd);
|
|
else if (!lms501kf03_power_is_on(power) &&
|
|
lms501kf03_power_is_on(lcd->power))
|
|
ret = lms501kf03_power_off(lcd);
|
|
|
|
if (!ret)
|
|
lcd->power = power;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int lms501kf03_get_power(struct lcd_device *ld)
|
|
{
|
|
struct lms501kf03 *lcd = lcd_get_data(ld);
|
|
|
|
return lcd->power;
|
|
}
|
|
|
|
static int lms501kf03_set_power(struct lcd_device *ld, int power)
|
|
{
|
|
struct lms501kf03 *lcd = lcd_get_data(ld);
|
|
|
|
if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
|
|
power != FB_BLANK_NORMAL) {
|
|
dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return lms501kf03_power(lcd, power);
|
|
}
|
|
|
|
static struct lcd_ops lms501kf03_lcd_ops = {
|
|
.get_power = lms501kf03_get_power,
|
|
.set_power = lms501kf03_set_power,
|
|
};
|
|
|
|
static int lms501kf03_probe(struct spi_device *spi)
|
|
{
|
|
struct lms501kf03 *lcd = NULL;
|
|
struct lcd_device *ld = NULL;
|
|
int ret = 0;
|
|
|
|
lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);
|
|
if (!lcd)
|
|
return -ENOMEM;
|
|
|
|
/* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */
|
|
spi->bits_per_word = 9;
|
|
|
|
ret = spi_setup(spi);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "spi setup failed.\n");
|
|
return ret;
|
|
}
|
|
|
|
lcd->spi = spi;
|
|
lcd->dev = &spi->dev;
|
|
|
|
lcd->lcd_pd = dev_get_platdata(&spi->dev);
|
|
if (!lcd->lcd_pd) {
|
|
dev_err(&spi->dev, "platform data is NULL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd,
|
|
&lms501kf03_lcd_ops);
|
|
if (IS_ERR(ld))
|
|
return PTR_ERR(ld);
|
|
|
|
lcd->ld = ld;
|
|
|
|
if (!lcd->lcd_pd->lcd_enabled) {
|
|
/*
|
|
* if lcd panel was off from bootloader then
|
|
* current lcd status is powerdown and then
|
|
* it enables lcd panel.
|
|
*/
|
|
lcd->power = FB_BLANK_POWERDOWN;
|
|
|
|
lms501kf03_power(lcd, FB_BLANK_UNBLANK);
|
|
} else {
|
|
lcd->power = FB_BLANK_UNBLANK;
|
|
}
|
|
|
|
spi_set_drvdata(spi, lcd);
|
|
|
|
dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lms501kf03_remove(struct spi_device *spi)
|
|
{
|
|
struct lms501kf03 *lcd = spi_get_drvdata(spi);
|
|
|
|
lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int lms501kf03_suspend(struct device *dev)
|
|
{
|
|
struct lms501kf03 *lcd = dev_get_drvdata(dev);
|
|
|
|
dev_dbg(dev, "lcd->power = %d\n", lcd->power);
|
|
|
|
/*
|
|
* when lcd panel is suspend, lcd panel becomes off
|
|
* regardless of status.
|
|
*/
|
|
return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
|
|
}
|
|
|
|
static int lms501kf03_resume(struct device *dev)
|
|
{
|
|
struct lms501kf03 *lcd = dev_get_drvdata(dev);
|
|
|
|
lcd->power = FB_BLANK_POWERDOWN;
|
|
|
|
return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend,
|
|
lms501kf03_resume);
|
|
|
|
static void lms501kf03_shutdown(struct spi_device *spi)
|
|
{
|
|
struct lms501kf03 *lcd = spi_get_drvdata(spi);
|
|
|
|
lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
|
|
}
|
|
|
|
static struct spi_driver lms501kf03_driver = {
|
|
.driver = {
|
|
.name = "lms501kf03",
|
|
.pm = &lms501kf03_pm_ops,
|
|
},
|
|
.probe = lms501kf03_probe,
|
|
.remove = lms501kf03_remove,
|
|
.shutdown = lms501kf03_shutdown,
|
|
};
|
|
|
|
module_spi_driver(lms501kf03_driver);
|
|
|
|
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
|
|
MODULE_DESCRIPTION("lms501kf03 LCD Driver");
|
|
MODULE_LICENSE("GPL");
|