| /* |
| * 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; |
| } |