| /* |
| * drivers/amlogic/media/vout/lcd/lcd_extern/spi_LD070WS2.c |
| * |
| * Copyright (C) 2015 Amlogic, Inc. All rights reserved. |
| * |
| * 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. |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include <common.h> |
| #include <malloc.h> |
| #include <asm/arch/gpio.h> |
| #include <fdtdec.h> |
| #include <amlogic/media/vout/lcd/aml_lcd.h> |
| #include <amlogic/media/vout/lcd/lcd_extern.h> |
| #include "lcd_extern.h" |
| #include "../lcd_common.h" |
| #include "../lcd_reg.h" |
| |
| #define LCD_EXTERN_NAME "spi_LD070WS2" |
| #define LCD_EXTERN_TYPE LCD_EXTERN_SPI |
| |
| #define SPI_CLK_FREQ 10 //KHz |
| #define SPI_CLK_POL 1 |
| |
| #define SPI_DELAY 30 //unit: us |
| |
| static struct lcd_extern_config_s *ext_config; |
| static unsigned char spi_gpio_cs = 0xff; |
| static unsigned char spi_gpio_clk = 0xff; |
| static unsigned char spi_gpio_data = 0xff; |
| |
| #define LCD_EXTERN_CMD_SIZE 3 |
| static unsigned char init_on_table[] = { |
| 0xc0, 0x00, 0x21, /* reset */ |
| 0xc0, 0x00, 0xa5, /* standby */ |
| 0xc0, 0x01, 0x30, /* enable FRC/Dither */ |
| 0xc0, 0x02, 0x40, /* enable normally black */ |
| 0xc0, 0x0e, 0x5f, /* enable test mode1 */ |
| 0xc0, 0x0f, 0xa4, /* enable test mode2 */ |
| 0xc0, 0x0d, 0x00, /* enable SDRRS, enlarge OE width */ |
| 0xc0, 0x02, 0x43, /* adjust charge sharing time */ |
| 0xc0, 0x0a, 0x28, /* trigger bias reduction */ |
| 0xc0, 0x10, 0x41, /* adopt 2 line/1 dot */ |
| 0xfd, 50, 0, /* delay 50ms */ |
| 0xc0, 0x00, 0xad, /* display on */ |
| 0xff, 0x00, 0x00, /* ending */ |
| }; |
| |
| static unsigned char init_off_table[] = { |
| 0xc0, 0x00, 0xa5, /* standby */ |
| 0xff, 0x00, 0x00, /* ending */ |
| }; |
| |
| static void lcd_extern_set_csb(unsigned v) |
| { |
| lcd_ext_gpio_set(spi_gpio_cs, v); |
| udelay(SPI_DELAY); |
| } |
| |
| static void lcd_extern_set_scl(unsigned v) |
| { |
| lcd_ext_gpio_set(spi_gpio_clk, v); |
| udelay(SPI_DELAY); |
| } |
| |
| static void lcd_extern_set_sda(unsigned v) |
| { |
| lcd_ext_gpio_set(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_dynamic_size(unsigned char *table, int flag) |
| { |
| int i = 0, j = 0, max_len = 0, step = 0; |
| unsigned char type, cmd_size; |
| int delay_ms, ret = 0; |
| |
| if (flag) |
| max_len = ext_config->table_init_on_cnt; |
| else |
| max_len = ext_config->table_init_off_cnt; |
| |
| while ((i + 1) < max_len) { |
| type = table[i]; |
| if (type == LCD_EXT_CMD_TYPE_END) |
| break; |
| if (lcd_debug_print_flag) { |
| EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n", |
| __func__, step, type, table[i+1]); |
| } |
| cmd_size = table[i+1]; |
| if (cmd_size == 0) |
| goto power_cmd_dynamic_next; |
| if ((i + 2 + cmd_size) > max_len) |
| break; |
| |
| if (type == LCD_EXT_CMD_TYPE_NONE) { |
| /* do nothing */ |
| } else if (type == LCD_EXT_CMD_TYPE_GPIO) { |
| if (cmd_size < 2) { |
| EXTERR("step %d: invalid cmd_size %d for GPIO\n", |
| step, cmd_size); |
| goto power_cmd_dynamic_next; |
| } |
| lcd_ext_gpio_set(table[i+2], table[i+3]); |
| if (cmd_size > 2) { |
| if (table[i+4] > 0) |
| mdelay(table[i+4]); |
| } |
| } else if (type == LCD_EXT_CMD_TYPE_DELAY) { |
| delay_ms = 0; |
| for (j = 0; j < cmd_size; j++) |
| delay_ms += table[i+2+j]; |
| if (delay_ms > 0) |
| mdelay(delay_ms); |
| } else if (type == LCD_EXT_CMD_TYPE_CMD) { |
| ret = lcd_extern_spi_write(&table[i+2], cmd_size); |
| } else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) { |
| ret = lcd_extern_spi_write(&table[i+2], (cmd_size-1)); |
| if (table[i+1+cmd_size] > 0) |
| mdelay(table[i+1+cmd_size]); |
| } else { |
| EXTERR("%s: %s(%d): type 0x%02x invalid\n", |
| __func__, ext_config->name, ext_config->index, type); |
| } |
| power_cmd_dynamic_next: |
| i += (cmd_size + 2); |
| step++; |
| } |
| |
| return ret; |
| } |
| |
| static int lcd_extern_power_cmd_fixed_size(unsigned char *table, int flag) |
| { |
| int i = 0, j, max_len, step = 0; |
| unsigned char type, cmd_size; |
| int delay_ms, ret = 0; |
| |
| if (table == NULL) { |
| EXTERR("%s: init_table %d is NULL\n", __func__, flag); |
| return -1; |
| } |
| |
| cmd_size = ext_config->cmd_size; |
| if (cmd_size < 2) { |
| EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size); |
| return -1; |
| } |
| |
| if (flag) |
| max_len = ext_config->table_init_on_cnt; |
| else |
| max_len = ext_config->table_init_off_cnt; |
| |
| while ((i + cmd_size) <= max_len) { |
| type = table[i]; |
| if (type == LCD_EXT_CMD_TYPE_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_EXT_CMD_TYPE_NONE) { |
| //do nothing |
| } else if (type == LCD_EXT_CMD_TYPE_GPIO) { |
| lcd_ext_gpio_set(table[i+1], table[i+2]); |
| if (cmd_size > 3) { |
| if (table[i+3] > 0) |
| mdelay(table[i+3]); |
| } |
| } else if (type == LCD_EXT_CMD_TYPE_DELAY) { |
| delay_ms = 0; |
| for (j = 0; j < (cmd_size - 1); j++) |
| delay_ms += table[i+1+j]; |
| if (delay_ms > 0) |
| mdelay(delay_ms); |
| } else if (type == LCD_EXT_CMD_TYPE_CMD) { |
| ret = lcd_extern_spi_write(&table[i+1], (cmd_size-1)); |
| } else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) { |
| ret = lcd_extern_spi_write(&table[i+1], (cmd_size-2)); |
| if (table[i+cmd_size-1] > 0) |
| mdelay(table[i+cmd_size-1]); |
| } else { |
| EXTERR("%s(%d: %s): type 0x%02x is invalid\n", |
| __func__, ext_config->index, ext_config->name, type); |
| } |
| i += cmd_size; |
| step++; |
| } |
| |
| return ret; |
| } |
| |
| static int lcd_extern_power_ctrl(int flag) |
| { |
| unsigned char *table; |
| unsigned char cmd_size; |
| int ret = 0; |
| |
| spi_gpio_init(); |
| |
| cmd_size = ext_config->cmd_size; |
| if (flag) |
| table = ext_config->table_init_on; |
| else |
| table = ext_config->table_init_off; |
| if (cmd_size < 1) { |
| EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size); |
| ret = -1; |
| goto power_ctrl_next; |
| } |
| if (table == NULL) { |
| EXTERR("%s: init_table %d is NULL\n", __func__, flag); |
| ret = -1; |
| goto power_ctrl_next; |
| } |
| if (cmd_size == LCD_EXT_CMD_SIZE_DYNAMIC) |
| ret = lcd_extern_power_cmd_dynamic_size(table, flag); |
| else |
| ret = lcd_extern_power_cmd_fixed_size(table, flag); |
| |
| power_ctrl_next: |
| mdelay(10); |
| spi_gpio_off(); |
| |
| if (ret) { |
| EXTERR("%s: %s(%d): %d\n", __func__, ext_config->name, |
| ext_config->index, flag); |
| } else { |
| EXTPR("%s: %s(%d): %d\n", __func__, ext_config->name, |
| ext_config->index, 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; |
| } |
| |
| spi_gpio_cs = ext_drv->common->spi_gpio_cs; |
| spi_gpio_clk = ext_drv->common->spi_gpio_clk; |
| spi_gpio_data = ext_drv->common->spi_gpio_data; |
| |
| if (ext_drv->config->table_init_loaded == 0) { |
| ext_drv->config->cmd_size = LCD_EXTERN_CMD_SIZE; |
| ext_drv->config->table_init_on = init_on_table; |
| ext_drv->config->table_init_on_cnt = sizeof(init_on_table); |
| ext_drv->config->table_init_off = init_off_table; |
| ext_drv->config->table_init_off_cnt = sizeof(init_off_table); |
| } |
| ext_drv->config->spi_delay_us = 1000 / ext_drv->config->spi_clk_freq; |
| |
| ext_drv->power_on = lcd_extern_power_on; |
| ext_drv->power_off = lcd_extern_power_off; |
| |
| return 0; |
| } |
| |
| int 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; |
| } |