| /* |
| * drivers/display/lcd/lcd_bl_ldim/iw7027.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 <spi.h> |
| #include <asm/arch/gpio.h> |
| #ifdef CONFIG_OF_LIBFDT |
| #include <libfdt.h> |
| #endif |
| #include <amlogic/aml_lcd.h> |
| #include <amlogic/aml_ldim.h> |
| #include "../aml_lcd_reg.h" |
| #include "../aml_lcd_common.h" |
| #include "ldim_drv.h" |
| #include "ldim_dev_drv.h" |
| |
| #define NORMAL_MSG (0<<7) |
| #define BROADCAST_MSG (1<<7) |
| #define BLOCK_DATA (0<<6) |
| #define SINGLE_DATA (1<<6) |
| #define IW7027_DEV_ADDR 1 |
| |
| static int iw7027_on_flag; |
| |
| struct iw7027 { |
| int cs_hold_delay; |
| int cs_clk_delay; |
| unsigned char cmd_size; |
| unsigned char *init_data; |
| unsigned int init_data_cnt; |
| struct spi_slave *spi; |
| }; |
| static struct iw7027 *bl_iw7027; |
| |
| static unsigned char *val_brightness; |
| |
| #if 0 |
| static unsigned char iw7027_init_data[LDIM_INIT_ON_SIZE] = { |
| 0xc0, 0x23, 0x03, |
| 0xc0, 0x24, 0xff, |
| 0xc0, 0x25, 0x00, |
| 0xc0, 0x26, 0x00, |
| 0xc0, 0x27, 0x60, |
| 0xc0, 0x29, 0x00, |
| 0xc0, 0x2a, 0x00, |
| 0xc0, 0x2b, 0x00, |
| 0xc0, 0x2c, 0x73, |
| 0xc0, 0x2d, 0x37, |
| 0xc0, 0x31, 0x93, |
| 0xc0, 0x32, 0x0f, |
| 0xc0, 0x33, 0xff, |
| 0xc0, 0x34, 0xc8, |
| 0xc0, 0x35, 0xbf, |
| 0xff, 0x00, 0x00, |
| }; |
| #endif |
| |
| //iw7027 register write |
| static int iw7027_wreg(struct spi_slave *spi, unsigned char addr, unsigned char val) |
| { |
| unsigned char tbuf[3]; |
| int ret; |
| |
| if (lcd_debug_print_flag) |
| LDIMPR("%s: 0x%02x = 0x%02x\n", __func__, addr, val); |
| |
| tbuf[0] = NORMAL_MSG | SINGLE_DATA | IW7027_DEV_ADDR; |
| tbuf[1] = addr & 0x7f; |
| tbuf[2] = val; |
| ret = ldim_spi_write(spi, tbuf, 3); |
| |
| return ret; |
| } |
| |
| //iw7027 register read |
| static int iw7027_rreg(struct spi_slave *spi, unsigned char addr, |
| unsigned char *val) |
| { |
| unsigned char tbuf[4], rbuf[4], temp; |
| int ret; |
| |
| /*set read flag*/ |
| temp = (addr >= 0x80) ? 0x80 : 0x0; |
| iw7027_wreg(spi, 0x78, temp); |
| |
| tbuf[0] = NORMAL_MSG | SINGLE_DATA | IW7027_DEV_ADDR; |
| tbuf[1] = addr | 0x80; |
| tbuf[2] = 0; |
| ret = ldim_spi_read(spi, tbuf, 3, rbuf, 1); |
| *val = rbuf[3]; |
| |
| return ret; |
| } |
| |
| //iw7027 block write |
| static int iw7027_wregs(struct spi_slave *spi, unsigned char addr, |
| unsigned char *val, int len) |
| { |
| unsigned char tbuf[30]; |
| int ret, i; |
| |
| if (lcd_debug_print_flag) { |
| LDIMPR("%s: ", __func__); |
| for (i = 0; i < len; i++) |
| printf("0x%02x ", val[i]); |
| printf("\n"); |
| } |
| |
| tbuf[0] = NORMAL_MSG | BLOCK_DATA | IW7027_DEV_ADDR; |
| tbuf[1] = len; |
| tbuf[2] = addr & 0x7f; |
| memcpy(&tbuf[3], val, len); |
| ret = ldim_spi_write(spi, tbuf, (len + 3)); |
| |
| return ret; |
| } |
| |
| static int ldim_power_cmd_dynamic_size(void) |
| { |
| unsigned char *table; |
| int i = 0, j, step = 0, max_len = 0; |
| unsigned char type, cmd_size; |
| int delay_ms, ret = 0; |
| |
| table = bl_iw7027->init_data; |
| max_len = bl_iw7027->init_data_cnt; |
| |
| while ((i + 1) < max_len) { |
| type = table[i]; |
| if (type == LCD_EXT_CMD_TYPE_END) |
| break; |
| if (lcd_debug_print_flag) { |
| LDIMPR("%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_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 = iw7027_wreg(bl_iw7027->spi, |
| table[i+2], table[i+3]); |
| udelay(1); |
| } else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) { |
| ret = iw7027_wreg(bl_iw7027->spi, |
| table[i+2], table[i+3]); |
| udelay(1); |
| if (table[i+4] > 0) |
| mdelay(table[i+4]); |
| } else { |
| LDIMERR("%s: type 0x%02x invalid\n", __func__, type); |
| } |
| power_cmd_dynamic_next: |
| i += (cmd_size + 2); |
| step++; |
| } |
| |
| return ret; |
| } |
| |
| static int ldim_power_cmd_fixed_size(void) |
| { |
| unsigned char *table; |
| int i = 0, j, step = 0, max_len = 0; |
| unsigned char type, cmd_size; |
| int delay_ms, ret = 0; |
| |
| cmd_size = bl_iw7027->cmd_size; |
| if (cmd_size < 2) { |
| LDIMERR("%s: invalid cmd_size %d\n", __func__, cmd_size); |
| return -1; |
| } |
| |
| table = bl_iw7027->init_data; |
| max_len = bl_iw7027->init_data_cnt; |
| |
| while ((i + cmd_size) <= max_len) { |
| type = table[i]; |
| if (type == LCD_EXT_CMD_TYPE_END) |
| break; |
| if (lcd_debug_print_flag) { |
| LDIMPR("%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_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 = iw7027_wreg(bl_iw7027->spi, |
| table[i+1], table[i+2]); |
| udelay(1); |
| } else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) { |
| ret = iw7027_wreg(bl_iw7027->spi, |
| table[i+1], table[i+2]); |
| udelay(1); |
| if (table[i+3] > 0) |
| mdelay(table[i+3]); |
| } else { |
| LDIMERR("%s: type 0x%02x invalid\n", __func__, type); |
| } |
| i += cmd_size; |
| step++; |
| } |
| |
| return ret; |
| } |
| |
| static int iw7027_power_on_init(void) |
| { |
| unsigned char cmd_size; |
| int ret = 0; |
| |
| cmd_size = bl_iw7027->cmd_size; |
| if (cmd_size < 2) { |
| LDIMERR("%s: invalid cmd_size %d\n", __func__, cmd_size); |
| return -1; |
| } |
| if (cmd_size == LCD_EXT_CMD_SIZE_DYNAMIC) |
| ret = ldim_power_cmd_dynamic_size(); |
| else |
| ret = ldim_power_cmd_fixed_size(); |
| |
| return ret; |
| } |
| |
| static int iw7027_hw_init_on(void) |
| { |
| int i; |
| unsigned char reg_duty_chk = 0 , reg_chk = 0; |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| |
| /* step 1: system power_on */ |
| LDIMPR("%s: iw7027 system power_on\n", __func__); |
| ldim_set_gpio(ldim_drv->ldev_conf->en_gpio, ldim_drv->ldev_conf->en_gpio_on); |
| ldim_set_duty_pwm(&(ldim_drv->ldev_conf->ldim_pwm_config)); |
| ldim_set_duty_pwm(&(ldim_drv->ldev_conf->analog_pwm_config)); |
| |
| /* step 2: delay for internal logic stable */ |
| mdelay(10); |
| |
| /* step 3: SPI communication check */ |
| LDIMPR("%s: SPI Communication Check\n", __func__); |
| for (i = 0; i <= 10; i++) { |
| iw7027_wreg(bl_iw7027->spi, 0x00, 0x06); |
| iw7027_rreg(bl_iw7027->spi, 0x00, ®_chk); |
| if (reg_chk == 0x06) |
| break; |
| if (i == 10) { |
| LDIMERR("%s: SPI communication check error\n", |
| __func__); |
| } |
| } |
| |
| /* step 4: configure initial registers */ |
| LDIMPR("%s: Write initial control registers\n", __func__); |
| iw7027_power_on_init(); |
| |
| /* step 5: supply stable vsync */ |
| LDIMPR("%s: open Vsync\n", __func__); |
| ldim_drv->pinmux_ctrl(1); |
| |
| /* step 6: delay for system clock and light bar PSU stable */ |
| mdelay(550); |
| |
| /* step 7: start calibration */ |
| LDIMPR("%s: start calibration\n", __func__); |
| iw7027_wreg(bl_iw7027->spi, 0x00, 0x07); |
| mdelay(200); |
| |
| /* step 8: calibration done or not */ |
| i = 0; |
| while (i++ < 1000) { |
| iw7027_rreg(bl_iw7027->spi, 0xb3, ®_duty_chk); |
| /*VDAC statue reg :FB1=[0x5] FB2=[0x50]*/ |
| /*The current platform using FB1*/ |
| if ((reg_duty_chk & 0xf) == 0x05) |
| break; |
| mdelay(1); |
| } |
| LDIMPR("%s: calibration done: [%d] = %x\n", __func__, i, reg_duty_chk); |
| |
| return 0; |
| } |
| |
| static int iw7027_hw_init_off(void) |
| { |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| |
| ldim_drv->pinmux_ctrl(0); |
| ldim_set_gpio(ldim_drv->ldev_conf->en_gpio, ldim_drv->ldev_conf->en_gpio_off); |
| |
| return 0; |
| } |
| |
| static unsigned int dim_max, dim_min; |
| static unsigned int iw7027_get_value(unsigned int level) |
| { |
| unsigned int val; |
| |
| val = dim_min + ((level * (dim_max - dim_min)) / LD_DATA_MAX); |
| |
| return val; |
| } |
| |
| static int iw7027_smr(unsigned short *buf, unsigned char len) |
| { |
| unsigned int i, temp; |
| unsigned short num; |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| |
| if (iw7027_on_flag == 0) { |
| LDIMPR("%s: on_flag=%d\n", __func__, iw7027_on_flag); |
| return 0; |
| } |
| num = ldim_drv->ldev_conf->bl_regnum; |
| if (len != num) { |
| LDIMERR("%s: data len %d invalid\n", __func__, len); |
| return -1; |
| } |
| if (val_brightness == NULL) { |
| LDIMERR("%s: val_brightness is null\n", __func__); |
| return -1; |
| } |
| |
| dim_max = ldim_drv->ldev_conf->dim_max; |
| dim_min = ldim_drv->ldev_conf->dim_min; |
| |
| for (i = 0; i < num; i++) { |
| temp = iw7027_get_value(buf[i]); |
| val_brightness[2*i] = (temp >> 8) & 0xf; |
| val_brightness[2*i+1] = temp & 0xff; |
| } |
| |
| iw7027_wregs(bl_iw7027->spi, 0x40, val_brightness, (num * 2)); |
| |
| return 0; |
| } |
| |
| static int iw7027_power_on(void) |
| { |
| iw7027_hw_init_on(); |
| iw7027_on_flag = 1; |
| |
| LDIMPR("%s: ok\n", __func__); |
| return 0; |
| } |
| |
| static int iw7027_power_off(void) |
| { |
| iw7027_on_flag = 0; |
| iw7027_hw_init_off(); |
| |
| LDIMPR("%s: ok\n", __func__); |
| return 0; |
| } |
| |
| static int iw7027_ldim_driver_update(struct aml_ldim_driver_s *ldim_drv) |
| { |
| ldim_drv->device_power_on = iw7027_power_on; |
| ldim_drv->device_power_off = iw7027_power_off; |
| ldim_drv->device_bri_update = iw7027_smr; |
| return 0; |
| } |
| |
| int ldim_dev_iw7027_probe(struct aml_ldim_driver_s *ldim_drv) |
| { |
| if (ldim_drv->spi_info->spi == NULL) { |
| LDIMERR("%s: spi is null\n", __func__); |
| return -1; |
| } |
| |
| bl_iw7027 = (struct iw7027 *)malloc(sizeof(struct iw7027)); |
| if (bl_iw7027 == NULL) { |
| LDIMERR("iw7027 malloc error\n"); |
| return -1; |
| } |
| memset(bl_iw7027, 0, sizeof(struct iw7027)); |
| |
| iw7027_on_flag = 0; |
| |
| bl_iw7027->spi = ldim_drv->spi_info->spi; |
| bl_iw7027->cs_hold_delay = ldim_drv->ldev_conf->cs_hold_delay; |
| bl_iw7027->cs_clk_delay = ldim_drv->ldev_conf->cs_clk_delay; |
| bl_iw7027->cmd_size = ldim_drv->ldev_conf->cmd_size; |
| bl_iw7027->init_data = ldim_drv->ldev_conf->init_on; |
| bl_iw7027->init_data_cnt = ldim_drv->ldev_conf->init_on_cnt; |
| |
| val_brightness = (unsigned char *)malloc( |
| ldim_drv->ldev_conf->bl_regnum * 2 * sizeof(unsigned char)); |
| if (val_brightness == NULL) { |
| LDIMERR("malloc val_brightness failed\n"); |
| free(bl_iw7027); |
| return -1; |
| } |
| |
| iw7027_ldim_driver_update(ldim_drv); |
| |
| printf("%s: ok\n", __func__); |
| |
| return 0; |
| } |
| |
| int ldim_dev_iw7027_remove(struct aml_ldim_driver_s *ldim_drv) |
| { |
| if (val_brightness) { |
| free(val_brightness); |
| val_brightness = NULL; |
| } |
| |
| if (bl_iw7027) { |
| free(bl_iw7027); |
| bl_iw7027 = NULL; |
| } |
| return 0; |
| } |
| |