| /* |
| * drivers/display/lcd/bl_extern/i2c_lp8556.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 |
| #ifdef CONFIG_SYS_I2C_AML |
| #include <aml_i2c.h> |
| #endif |
| #include <amlogic/aml_lcd.h> |
| #include <amlogic/aml_bl_extern.h> |
| #include "bl_extern.h" |
| #include "../aml_lcd_common.h" |
| #include "../aml_lcd_reg.h" |
| |
| //#define BL_EXT_I2C_PORT_INIT /* no need init i2c port here */ |
| //#define BL_EXT_DEBUG_INFO |
| |
| #ifdef CONFIG_SYS_I2C_AML |
| #define BL_EXTERN_INDEX 1 |
| #define BL_EXTERN_NAME "i2c_lp8556" |
| #define BL_EXTERN_TYPE BL_EXTERN_I2C |
| |
| #define BL_EXTERN_I2C_ADDR (0x58 >> 1) //7bit address |
| #define BL_EXTERN_I2C_BUS AML_I2C_MASTER_C |
| |
| #ifdef BL_EXT_I2C_PORT_INIT |
| static unsigned aml_i2c_bus_tmp; |
| #endif |
| |
| static unsigned int bl_status = 0; |
| |
| #define BL_EXTERN_CMD_SIZE 4 |
| static unsigned char init_on_table[] = { |
| 0x00, 0xa2, 0x20, 0x00, |
| 0x00, 0xa5, 0x54, 0x00, |
| 0x00, 0x00, 0xff, 0x00, |
| 0x00, 0x01, 0x05, 0x00, |
| 0x00, 0xa2, 0x20, 0x00, |
| 0x00, 0xa5, 0x54, 0x00, |
| 0x00, 0xa1, 0xb7, 0x00, |
| 0x00, 0xa0, 0xff, 0x00, |
| 0x00, 0x00, 0x80, 0x00, |
| 0xff, 0x00, 0x00, 0x00, //ending |
| }; |
| |
| static unsigned char init_off_table[] = { |
| 0xFF, 0x00, 0x00, 0x00, //ending |
| }; |
| |
| static int i2c_lp8556_write(unsigned i2caddr, unsigned char *buff, unsigned len) |
| { |
| int ret = 0; |
| #ifdef BL_EXT_DEBUG_INFO |
| int i; |
| #endif |
| struct i2c_msg msg; |
| |
| msg.addr = i2caddr; |
| msg.flags = 0; |
| msg.len = len; |
| msg.buf = buff; |
| |
| #ifdef BL_EXT_DEBUG_INFO |
| printf("%s:", __func__); |
| for (i = 0; i < len; i++) { |
| printf(" 0x%02x", buff[i]); |
| } |
| printf(" [addr 0x%02x]\n", i2caddr); |
| #endif |
| |
| ret = aml_i2c_xfer(&msg, 1); |
| //ret = aml_i2c_xfer_slow(&msg, 1); |
| if (ret < 0) |
| BLEXERR("i2c write failed [addr 0x%02x]\n", i2caddr); |
| |
| return ret; |
| } |
| |
| |
| static int i2c_lp8556_power_cmd(unsigned char *init_table) |
| { |
| int len; |
| int i = 0; |
| int ret = 0; |
| struct aml_bl_extern_driver_s *bl_extern = aml_bl_extern_get_driver(); |
| |
| len = BL_EXTERN_CMD_SIZE; |
| while (i <= BL_EXTERN_INIT_TABLE_MAX) { |
| if (init_table[i] == BL_EXTERN_INIT_END) { |
| break; |
| } else if (init_table[i] == BL_EXTERN_INIT_NONE) { |
| //do nothing, only for delay |
| } else if (init_table[i] == BL_EXTERN_INIT_CMD) { |
| ret = i2c_lp8556_write(bl_extern->config->i2c_addr, |
| &init_table[i+1], (len-2)); |
| } else { |
| BLEXERR("%s(%d: %s): pwoer_type %d is invalid\n", |
| __func__, bl_extern->config->index, |
| bl_extern->config->name, bl_extern->config->type); |
| } |
| if (init_table[i+len-1] > 0) |
| mdelay(init_table[i+len-1]); |
| i += len; |
| } |
| |
| return ret; |
| } |
| |
| #ifdef BL_EXT_I2C_PORT_INIT |
| static int bl_extern_change_i2c_bus(unsigned aml_i2c_bus) |
| { |
| int ret = 0; |
| extern struct aml_i2c_platform g_aml_i2c_plat; |
| |
| if (aml_i2c_bus == BL_EXTERN_I2C_BUS_INVALID) { |
| BLEXERR("%s: invalid i2c_bus\n", __func__); |
| return -1; |
| } |
| g_aml_i2c_plat.master_no = aml_i2c_bus; |
| ret = aml_i2c_init(); |
| |
| return ret; |
| } |
| #endif |
| |
| static int i2c_lp8556_power_ctrl(int flag) |
| { |
| #ifdef BL_EXT_I2C_PORT_INIT |
| extern struct aml_i2c_platform g_aml_i2c_plat; |
| aml_i2c_bus_tmp = g_aml_i2c_plat.master_no; |
| #endif |
| struct aml_bl_extern_driver_s *bl_extern = aml_bl_extern_get_driver(); |
| int ret = 0; |
| |
| if (bl_status) { |
| /* step 1: power prepare */ |
| #ifdef BL_EXT_I2C_PORT_INIT |
| bl_extern_change_i2c_bus(bl_extern->i2c_bus); |
| #endif |
| |
| /* step 2: power cmd */ |
| if (flag) |
| ret = i2c_lp8556_power_cmd(init_on_table); |
| else |
| ret = i2c_lp8556_power_cmd(init_off_table); |
| |
| /* step 3: power finish */ |
| #ifdef BL_EXT_I2C_PORT_INIT |
| bl_extern_change_i2c_bus(aml_i2c_bus_tmp); |
| #endif |
| } |
| BLEX("%s(%d: %s): %d\n", |
| __func__, bl_extern->config->index, |
| bl_extern->config->name, flag); |
| return ret; |
| } |
| |
| static int i2c_lp8556_power_on(void) |
| { |
| int ret; |
| |
| bl_status = 1; |
| ret = i2c_lp8556_power_ctrl(1); |
| |
| return ret; |
| |
| } |
| |
| static int i2c_lp8556_power_off(void) |
| { |
| int ret; |
| |
| bl_status = 0; |
| ret = i2c_lp8556_power_ctrl(0); |
| return ret; |
| |
| } |
| |
| static int i2c_lp8556_set_level(unsigned int level) |
| { |
| unsigned char tData[3]; |
| int ret = 0; |
| struct aml_lcd_drv_s *bl_drv = aml_lcd_get_driver(); |
| struct aml_bl_extern_driver_s *bl_extern = aml_bl_extern_get_driver(); |
| unsigned int level_max, level_min; |
| unsigned int dim_max, dim_min; |
| |
| if (bl_drv == NULL) |
| return -1; |
| level_max = bl_drv->bl_config->level_max; |
| level_min = bl_drv->bl_config->level_min; |
| dim_max = bl_extern->config->dim_max; |
| dim_min = bl_extern->config->dim_min; |
| level = dim_min - ((level - level_min) * (dim_min - dim_max)) / |
| (level_max - level_min); |
| level &= 0xff; |
| |
| if (bl_status) { |
| tData[0] = 0x0; |
| tData[1] = level; |
| ret = i2c_lp8556_write(bl_extern->config->i2c_addr, |
| tData, 2); |
| } |
| return ret; |
| } |
| |
| static int i2c_lp8556_update(void) |
| { |
| struct aml_bl_extern_driver_s *bl_extern = aml_bl_extern_get_driver(); |
| |
| if (bl_extern == NULL) { |
| BLEXERR("%s driver is null\n", BL_EXTERN_NAME); |
| return -1; |
| } |
| |
| if (bl_extern->config->type == BL_EXTERN_MAX) { |
| bl_extern->config->index = BL_EXTERN_INDEX; |
| bl_extern->config->type = BL_EXTERN_TYPE; |
| strcpy(bl_extern->config->name, BL_EXTERN_NAME); |
| bl_extern->config->i2c_addr = BL_EXTERN_I2C_ADDR; |
| bl_extern->config->i2c_bus = BL_EXTERN_I2C_BUS; |
| } |
| |
| bl_extern->device_power_on = i2c_lp8556_power_on; |
| bl_extern->device_power_off = i2c_lp8556_power_off; |
| bl_extern->device_bri_update = i2c_lp8556_set_level; |
| |
| return 0; |
| } |
| |
| int i2c_lp8556_probe(void) |
| { |
| int ret = 0; |
| |
| ret = i2c_lp8556_update(); |
| if (lcd_debug_print_flag) |
| BLEX("%s: %d\n", __func__, ret); |
| |
| return ret; |
| } |
| |
| #endif |
| |