drivers/display/lcd/lcd_extern/spi_LD070WS2.c - u-boot - Git at Google

 /*
  * drivers/display/lcd/lcd_extern/spi_LD070WS2.c
  *
  * 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 named License,
  * or any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
  *
  */

 #include <common.h>
 #include <malloc.h>
 #include <asm/arch/gpio.h>
 #ifdef CONFIG_OF_LIBFDT
 #include <libfdt.h>
 #endif
 #include <amlogic/aml_lcd.h>
 #include <amlogic/aml_lcd_extern.h>
 #include "lcd_extern.h"
 #include "../aml_lcd_common.h"
 #include "../aml_lcd_reg.h"

 #define LCD_EXTERN_INDEX	1
 #define LCD_EXTERN_NAME		"spi_LD070WS2"
 #define LCD_EXTERN_TYPE		LCD_EXTERN_SPI

 #define GPIO_SPI_CS		0 /* index */
 #define GPIO_SPI_CLK		1 /* index */
 #define GPIO_SPI_DATA		2 /* index */

 #define SPI_DELAY		30 //unit: us

 static struct lcd_extern_config_s *ext_config;

 #define LCD_EXTERN_CMD_SIZE        4
 static unsigned char init_on_table[] = {
 	0x00, 0x00, 0x21, 0x00, /* reset */
 	0x00, 0x00, 0xa5, 0x00, /* standby */
 	0x00, 0x01, 0x30, 0x00, /* enable FRC/Dither */
 	0x00, 0x02, 0x40, 0x00, /* enable normally black */
 	0x00, 0x0e, 0x5f, 0x00, /* enable test mode1 */
 	0x00, 0x0f, 0xa4, 0x00, /* enable test mode2 */
 	0x00, 0x0d, 0x00, 0x00, /* enable SDRRS, enlarge OE width */
 	0x00, 0x02, 0x43, 0x00, /* adjust charge sharing time */
 	0x00, 0x0a, 0x28, 0x00, /* trigger bias reduction */
 	0x00, 0x10, 0x41, 50,   /* adopt 2 line/1 dot */ /* delay 50ms */
 	0x00, 0x00, 0xad, 0x00, /* display on */
 	0xff, 0x00, 0x00, 0x00, /* ending flag */
 };

 static unsigned char init_off_table[] = {
 	0x00, 0x00, 0xa5, 0x00, /* standby */
 	0xff, 0x00, 0x00, 0x00, /* ending flag */
 };

 static void lcd_extern_set_csb(unsigned v)
 {
 	aml_lcd_extern_set_gpio(ext_config->spi_gpio_cs, v);
 	udelay(SPI_DELAY);
 }

 static void lcd_extern_set_scl(unsigned v)
 {
 	aml_lcd_extern_set_gpio(ext_config->spi_gpio_clk, v);
 	udelay(SPI_DELAY);
 }

 static void lcd_extern_set_sda(unsigned v)
 {
 	aml_lcd_extern_set_gpio(ext_config->spi_gpio_data, v);
 	udelay(SPI_DELAY);
 }

 static void spi_gpio_init(void)
 {
 	lcd_extern_set_csb(1);
 	lcd_extern_set_scl(1);
 	lcd_extern_set_sda(1);
 }

 static void spi_gpio_off(void)
 {
 	lcd_extern_set_sda(0);
 	lcd_extern_set_scl(0);
 	lcd_extern_set_csb(0);
 }

 static void spi_write_8(unsigned char addr, unsigned char data)
 {
 	int i;
 	unsigned int sdata;

 	sdata = (unsigned int)(addr & 0x3f);
 	sdata <<= 10;
 	sdata |= (data & 0xff);
 	sdata &= ~(1<<9); //write flag

 	lcd_extern_set_csb(1);
 	lcd_extern_set_scl(1);
 	lcd_extern_set_sda(1);

 	lcd_extern_set_csb(0);
 	for (i = 0; i < 16; i++) {
 		lcd_extern_set_scl(0);
 		if (sdata & 0x8000)
 			lcd_extern_set_sda(1);
 		else
 			lcd_extern_set_sda(0);
 		sdata <<= 1;
 		lcd_extern_set_scl(1);
 	}

 	lcd_extern_set_csb(1);
 	lcd_extern_set_scl(1);
 	lcd_extern_set_sda(1);
 	udelay(SPI_DELAY);
 }

 static int lcd_extern_spi_write(unsigned char *buf, int len)
 {
 	if (len != 2) {
 		EXTERR("%s: len %d error\n", __func__, len);
 		return -1;
 	}
 	spi_write_8(buf[0], buf[1]);
 	return 0;
 }

 static int lcd_extern_power_cmd(unsigned char *init_table, int flag)
 {
 	int i = 0, max_len, step = 0;
 	unsigned char type, cmd_size;
 	int ret = 0;

 	cmd_size = ext_config->cmd_size;
 	if (cmd_size < 1) {
 		EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size);
 		return -1;
 	}
 	if (cmd_size == LCD_EXTERN_CMD_SIZE_DYNAMIC) {
 		EXTPR("%s: cmd_size dynamic length to do\n", __func__);
 		return -1;
 	}
 	if (init_table == NULL) {
 		EXTERR("%s: init_table %d is NULL\n", __func__, flag);
 		return -1;
 	}

 	if (flag)
 		max_len = LCD_EXTERN_INIT_ON_MAX;
 	else
 		max_len = LCD_EXTERN_INIT_OFF_MAX;

 	while (i <= max_len) {
 		type = init_table[i];
 		if (type == LCD_EXTERN_INIT_END)
 			break;
 		if (lcd_debug_print_flag) {
 			EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
 				__func__, step, type, cmd_size);
 		}
 		if (type == LCD_EXTERN_INIT_NONE) {
 			//do nothing, only for delay
 		} else if (type == LCD_EXTERN_INIT_GPIO) {
 			aml_lcd_extern_set_gpio(init_table[i+1], init_table[i+2]);
 		} else if (type == LCD_EXTERN_INIT_CMD) {
 			ret = lcd_extern_spi_write(&init_table[i+1], (cmd_size-2));
 		} else {
 			EXTERR("%s(%d: %s): pwoer_type %d is invalid\n",
 				__func__, ext_config->index,
 				ext_config->name, ext_config->type);
 		}
 		if (init_table[i+cmd_size-1] > 0)
 			mdelay(init_table[i+cmd_size-1]);
 		step++;
 		i += cmd_size;
 	}

 	return ret;
 }

 static int lcd_extern_power_ctrl(int flag)
 {
 	int ret = 0;

 	spi_gpio_init();
 	if (flag)
 		ret = lcd_extern_power_cmd(ext_config->table_init_on, 1);
 	else
 		ret = lcd_extern_power_cmd(ext_config->table_init_off, 0);
 	mdelay(10);
 	spi_gpio_off();

 	EXTPR("%s(%d: %s): %d\n",
 		__func__, ext_config->index, ext_config->name, flag);
 	return ret;
 }

 static int lcd_extern_power_on(void)
 {
 	int ret;

 	ret = lcd_extern_power_ctrl(1);
 	return ret;
 }

 static int lcd_extern_power_off(void)
 {
 	int ret;

 	ret = lcd_extern_power_ctrl(0);
 	return ret;
 }

 static int lcd_extern_driver_update(struct aml_lcd_extern_driver_s *ext_drv)
 {
 	if (ext_drv == NULL) {
 		EXTERR("%s driver is null\n", LCD_EXTERN_NAME);
 		return -1;
 	}

 	if (ext_drv->config->type == LCD_EXTERN_MAX) { //default for no dt
 		ext_drv->config->index = LCD_EXTERN_INDEX;
 		ext_drv->config->type = LCD_EXTERN_TYPE;
 		strcpy(ext_drv->config->name, LCD_EXTERN_NAME);
 		ext_drv->config->spi_gpio_cs = GPIO_SPI_CS;
 		ext_drv->config->spi_gpio_clk = GPIO_SPI_CLK;
 		ext_drv->config->spi_gpio_data = GPIO_SPI_DATA;
 	}
 	if (ext_drv->config->table_init_loaded == 0) {
 		ext_drv->config->table_init_on  = init_on_table;
 		ext_drv->config->table_init_off = init_off_table;
 	}
 	ext_drv->power_on  = lcd_extern_power_on;
 	ext_drv->power_off = lcd_extern_power_off;

 	return 0;
 }

 int aml_lcd_extern_spi_LD070WS2_get_default_index(void)
 {
 	return LCD_EXTERN_INDEX;
 }

 int aml_lcd_extern_spi_LD070WS2_probe(struct aml_lcd_extern_driver_s *ext_drv)
 {
 	int ret = 0;

 	ext_config = ext_drv->config;
 	ret = lcd_extern_driver_update(ext_drv);

 	if (lcd_debug_print_flag)
 		EXTPR("%s: %d\n", __func__, ret);
 	return ret;
 }
	/*
	* drivers/display/lcd/lcd_extern/spi_LD070WS2.c
	*
	* 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 named License,
	* or any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#include <common.h>
	#include <malloc.h>
	#include <asm/arch/gpio.h>
	#ifdef CONFIG_OF_LIBFDT
	#include <libfdt.h>
	#endif
	#include <amlogic/aml_lcd.h>
	#include <amlogic/aml_lcd_extern.h>
	#include "lcd_extern.h"
	#include "../aml_lcd_common.h"
	#include "../aml_lcd_reg.h"

	#define LCD_EXTERN_INDEX 1
	#define LCD_EXTERN_NAME "spi_LD070WS2"
	#define LCD_EXTERN_TYPE LCD_EXTERN_SPI

	#define GPIO_SPI_CS 0 /* index */
	#define GPIO_SPI_CLK 1 /* index */
	#define GPIO_SPI_DATA 2 /* index */

	#define SPI_DELAY 30 //unit: us

	static struct lcd_extern_config_s *ext_config;

	#define LCD_EXTERN_CMD_SIZE 4
	static unsigned char init_on_table[] = {
	0x00, 0x00, 0x21, 0x00, /* reset */
	0x00, 0x00, 0xa5, 0x00, /* standby */
	0x00, 0x01, 0x30, 0x00, /* enable FRC/Dither */
	0x00, 0x02, 0x40, 0x00, /* enable normally black */
	0x00, 0x0e, 0x5f, 0x00, /* enable test mode1 */
	0x00, 0x0f, 0xa4, 0x00, /* enable test mode2 */
	0x00, 0x0d, 0x00, 0x00, /* enable SDRRS, enlarge OE width */
	0x00, 0x02, 0x43, 0x00, /* adjust charge sharing time */
	0x00, 0x0a, 0x28, 0x00, /* trigger bias reduction */
	0x00, 0x10, 0x41, 50, /* adopt 2 line/1 dot / / delay 50ms */
	0x00, 0x00, 0xad, 0x00, /* display on */
	0xff, 0x00, 0x00, 0x00, /* ending flag */
	};

	static unsigned char init_off_table[] = {
	0x00, 0x00, 0xa5, 0x00, /* standby */
	0xff, 0x00, 0x00, 0x00, /* ending flag */
	};

	static void lcd_extern_set_csb(unsigned v)
	{
	aml_lcd_extern_set_gpio(ext_config->spi_gpio_cs, v);
	udelay(SPI_DELAY);
	}

	static void lcd_extern_set_scl(unsigned v)
	{
	aml_lcd_extern_set_gpio(ext_config->spi_gpio_clk, v);
	udelay(SPI_DELAY);
	}

	static void lcd_extern_set_sda(unsigned v)
	{
	aml_lcd_extern_set_gpio(ext_config->spi_gpio_data, v);
	udelay(SPI_DELAY);
	}

	static void spi_gpio_init(void)
	{
	lcd_extern_set_csb(1);
	lcd_extern_set_scl(1);
	lcd_extern_set_sda(1);
	}

	static void spi_gpio_off(void)
	{
	lcd_extern_set_sda(0);
	lcd_extern_set_scl(0);
	lcd_extern_set_csb(0);
	}

	static void spi_write_8(unsigned char addr, unsigned char data)
	{
	int i;
	unsigned int sdata;

	sdata = (unsigned int)(addr & 0x3f);
	sdata <<= 10;
	sdata \|= (data & 0xff);
	sdata &= ~(1<<9); //write flag

	lcd_extern_set_csb(1);
	lcd_extern_set_scl(1);
	lcd_extern_set_sda(1);

	lcd_extern_set_csb(0);
	for (i = 0; i < 16; i++) {
	lcd_extern_set_scl(0);
	if (sdata & 0x8000)
	lcd_extern_set_sda(1);
	else
	lcd_extern_set_sda(0);
	sdata <<= 1;
	lcd_extern_set_scl(1);
	}

	lcd_extern_set_csb(1);
	lcd_extern_set_scl(1);
	lcd_extern_set_sda(1);
	udelay(SPI_DELAY);
	}

	static int lcd_extern_spi_write(unsigned char *buf, int len)
	{
	if (len != 2) {
	EXTERR("%s: len %d error\n", __func__, len);
	return -1;
	}
	spi_write_8(buf[0], buf[1]);
	return 0;
	}

	static int lcd_extern_power_cmd(unsigned char *init_table, int flag)
	{
	int i = 0, max_len, step = 0;
	unsigned char type, cmd_size;
	int ret = 0;

	cmd_size = ext_config->cmd_size;
	if (cmd_size < 1) {
	EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size);
	return -1;
	}
	if (cmd_size == LCD_EXTERN_CMD_SIZE_DYNAMIC) {
	EXTPR("%s: cmd_size dynamic length to do\n", __func__);
	return -1;
	}
	if (init_table == NULL) {
	EXTERR("%s: init_table %d is NULL\n", __func__, flag);
	return -1;
	}

	if (flag)
	max_len = LCD_EXTERN_INIT_ON_MAX;
	else
	max_len = LCD_EXTERN_INIT_OFF_MAX;

	while (i <= max_len) {
	type = init_table[i];
	if (type == LCD_EXTERN_INIT_END)
	break;
	if (lcd_debug_print_flag) {
	EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
	__func__, step, type, cmd_size);
	}
	if (type == LCD_EXTERN_INIT_NONE) {
	//do nothing, only for delay
	} else if (type == LCD_EXTERN_INIT_GPIO) {
	aml_lcd_extern_set_gpio(init_table[i+1], init_table[i+2]);
	} else if (type == LCD_EXTERN_INIT_CMD) {
	ret = lcd_extern_spi_write(&init_table[i+1], (cmd_size-2));
	} else {
	EXTERR("%s(%d: %s): pwoer_type %d is invalid\n",
	__func__, ext_config->index,
	ext_config->name, ext_config->type);
	}
	if (init_table[i+cmd_size-1] > 0)
	mdelay(init_table[i+cmd_size-1]);
	step++;
	i += cmd_size;
	}

	return ret;
	}

	static int lcd_extern_power_ctrl(int flag)
	{
	int ret = 0;

	spi_gpio_init();
	if (flag)
	ret = lcd_extern_power_cmd(ext_config->table_init_on, 1);
	else
	ret = lcd_extern_power_cmd(ext_config->table_init_off, 0);
	mdelay(10);
	spi_gpio_off();

	EXTPR("%s(%d: %s): %d\n",
	__func__, ext_config->index, ext_config->name, flag);
	return ret;
	}

	static int lcd_extern_power_on(void)
	{
	int ret;

	ret = lcd_extern_power_ctrl(1);
	return ret;
	}

	static int lcd_extern_power_off(void)
	{
	int ret;

	ret = lcd_extern_power_ctrl(0);
	return ret;
	}

	static int lcd_extern_driver_update(struct aml_lcd_extern_driver_s *ext_drv)
	{
	if (ext_drv == NULL) {
	EXTERR("%s driver is null\n", LCD_EXTERN_NAME);
	return -1;
	}

	if (ext_drv->config->type == LCD_EXTERN_MAX) { //default for no dt
	ext_drv->config->index = LCD_EXTERN_INDEX;
	ext_drv->config->type = LCD_EXTERN_TYPE;
	strcpy(ext_drv->config->name, LCD_EXTERN_NAME);
	ext_drv->config->spi_gpio_cs = GPIO_SPI_CS;
	ext_drv->config->spi_gpio_clk = GPIO_SPI_CLK;
	ext_drv->config->spi_gpio_data = GPIO_SPI_DATA;
	}
	if (ext_drv->config->table_init_loaded == 0) {
	ext_drv->config->table_init_on = init_on_table;
	ext_drv->config->table_init_off = init_off_table;
	}
	ext_drv->power_on = lcd_extern_power_on;
	ext_drv->power_off = lcd_extern_power_off;

	return 0;
	}

	int aml_lcd_extern_spi_LD070WS2_get_default_index(void)
	{
	return LCD_EXTERN_INDEX;
	}

	int aml_lcd_extern_spi_LD070WS2_probe(struct aml_lcd_extern_driver_s *ext_drv)
	{
	int ret = 0;

	ext_config = ext_drv->config;
	ret = lcd_extern_driver_update(ext_drv);

	if (lcd_debug_print_flag)
	EXTPR("%s: %d\n", __func__, ret);
	return ret;
	}