| /* |
| * 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" |
| |
| #ifdef CONFIG_AML_SPICC |
| |
| #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; |
| int cmd_size; |
| unsigned char *init_data; |
| struct spi_slave *spi; |
| }; |
| struct iw7027 *bl_iw7027; |
| |
| extern struct ldim_spi_dev_info_s ldim_spi_dev; |
| |
| //iw7027 register write |
| static int iw7027_wreg(struct spi_slave *slave, u8 addr, u8 val) |
| { |
| u8 tbuf[3]; |
| int ret; |
| |
| if (lcd_debug_print_flag) |
| LDIMPR("%s: 0x%02x = 0x%02x\n", __func__, addr, val); |
| |
| ret = spi_claim_bus(slave); |
| if (ret) { |
| LDIMERR("%s: request spi bus failed\n", __func__); |
| goto end; |
| } |
| if (bl_iw7027->cs_hold_delay) |
| udelay(bl_iw7027->cs_hold_delay); |
| spi_cs_activate(slave); |
| if (bl_iw7027->cs_clk_delay) |
| udelay(bl_iw7027->cs_clk_delay); |
| |
| tbuf[0] = NORMAL_MSG | SINGLE_DATA | IW7027_DEV_ADDR; |
| tbuf[1] = addr & 0x7f; |
| tbuf[2] = val; |
| ret = spi_xfer(slave, 24, tbuf, 0, 0); |
| if (bl_iw7027->cs_clk_delay) |
| udelay(bl_iw7027->cs_clk_delay); |
| spi_cs_deactivate(slave); |
| |
| end: |
| spi_release_bus(slave); |
| return ret; |
| } |
| |
| //iw7027 register read |
| static int iw7027_rreg(struct spi_slave *slave, u8 addr, u8 *val) |
| { |
| u8 tbuf[4], rbuf[4]; |
| int ret; |
| |
| /*set read flag*/ |
| if (addr >= 0x80) |
| iw7027_wreg(bl_iw7027->spi, 0x78, 0x80); |
| else |
| iw7027_wreg(bl_iw7027->spi, 0x78, 0x0); |
| |
| ret = spi_claim_bus(slave); |
| if (ret) { |
| LDIMERR("%s: request spi bus failed\n", __func__); |
| goto end; |
| } |
| if (bl_iw7027->cs_hold_delay) |
| udelay(bl_iw7027->cs_hold_delay); |
| spi_cs_activate(slave); |
| if (bl_iw7027->cs_clk_delay) |
| udelay(bl_iw7027->cs_clk_delay); |
| |
| tbuf[0] = NORMAL_MSG | SINGLE_DATA | IW7027_DEV_ADDR; |
| tbuf[1] = addr | 0x80; |
| ret = spi_xfer(slave, 32, tbuf, rbuf, 0); |
| if (ret) |
| goto end; |
| *val = rbuf[3]; |
| if (bl_iw7027->cs_clk_delay) |
| udelay(bl_iw7027->cs_clk_delay); |
| spi_cs_deactivate(slave); |
| |
| end: |
| spi_release_bus(slave); |
| return ret; |
| } |
| |
| //iw7027 block write |
| static int iw7027_wregs(struct spi_slave *slave, u8 addr, u8 *val, int len) |
| { |
| u8 tbuf[30]; |
| int size, i; |
| int ret; |
| |
| if (lcd_debug_print_flag) { |
| LDIMPR("%s: ", __func__); |
| for (i = 0; i < len; i++) |
| printf("0x%02x ", val[i]); |
| printf("\n"); |
| } |
| |
| ret = spi_claim_bus(slave); |
| if (ret) { |
| LDIMERR("%s: request spi bus failed\n", __func__); |
| goto end; |
| } |
| if (bl_iw7027->cs_hold_delay) |
| udelay(bl_iw7027->cs_hold_delay); |
| spi_cs_activate(slave); |
| if (bl_iw7027->cs_clk_delay) |
| udelay(bl_iw7027->cs_clk_delay); |
| |
| tbuf[0] = NORMAL_MSG | BLOCK_DATA | IW7027_DEV_ADDR; |
| tbuf[1] = len; |
| tbuf[2] = addr & 0x7f; |
| size = (len + 3) * 8; |
| memcpy(&tbuf[3], val, len); |
| ret = spi_xfer(slave, size, tbuf, 0, 0); |
| if (bl_iw7027->cs_clk_delay) |
| udelay(bl_iw7027->cs_clk_delay); |
| spi_cs_deactivate(slave); |
| |
| end: |
| spi_release_bus(slave); |
| return ret; |
| } |
| |
| static int iw7027_power_on_init(void) |
| { |
| unsigned char addr, val; |
| int i, ret = 0; |
| |
| for (i = 0; i < LDIM_SPI_INIT_ON_SIZE; i += bl_iw7027->cmd_size) { |
| if (bl_iw7027->init_data[i] == 0xff) { |
| if (bl_iw7027->init_data[i+3] > 0) |
| mdelay(bl_iw7027->init_data[i+3]); |
| break; |
| } else if (bl_iw7027->init_data[i] == 0x0) { |
| addr = bl_iw7027->init_data[i+1]; |
| val = bl_iw7027->init_data[i+2]; |
| ret = iw7027_wreg(bl_iw7027->spi, addr, val); |
| udelay(1); |
| } |
| if (bl_iw7027->init_data[i+3] > 0) |
| mdelay(bl_iw7027->init_data[i+3]); |
| } |
| |
| return ret; |
| } |
| |
| static int iw7027_hw_init_on(void) |
| { |
| int i, count = 1000; |
| unsigned char reg_duty_chk = 0 , reg_chk = 0; |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| |
| /*iw7027 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->pwm_config)); |
| mdelay(10); |
| |
| /*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; |
| else if(i == 10) |
| goto iw7027_smr_end; |
| } |
| /*Write initial control registers*/ |
| LDIMPR("%s: Write initial control registers\n", __func__); |
| iw7027_power_on_init(); |
| |
| /*open Vsync*/ |
| LDIMPR("%s: open Vsync\n", __func__); |
| ldim_drv->pinmux_ctrl(1); |
| mdelay(500); |
| |
| /*Disable soft reset*/ |
| LDIMPR("%s: Disable soft reset\n", __func__); |
| iw7027_wreg(bl_iw7027->spi, 0x00, 0x07); |
| |
| /*Calibration Done or not*/ |
| LDIMPR("%s: Calibration Done or not\n", __func__); |
| while (count --) { |
| 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: reg_duty_chk[%d] = %x\n", __func__, count, reg_duty_chk); |
| iw7027_smr_end: |
| |
| 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 iw7027_get_value(unsigned int level) |
| { |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| unsigned int val; |
| unsigned int dim_max, dim_min; |
| |
| dim_max = ldim_drv->ldev_conf->dim_max; |
| dim_min = ldim_drv->ldev_conf->dim_min; |
| |
| val = dim_min + ((level * (dim_max - dim_min)) / LD_DATA_MAX); |
| |
| return val; |
| } |
| |
| static int iw7027_smr(unsigned short *buf, unsigned char len) |
| { |
| unsigned char val_0[20]; |
| |
| if (iw7027_on_flag == 0) { |
| if (lcd_debug_print_flag) |
| LDIMPR("%s: on_flag=%d\n", __func__, iw7027_on_flag); |
| return 0; |
| } |
| if (len != 10) { |
| LDIMERR("%s: data len %d invalid\n", __func__, len); |
| return -1; |
| } |
| |
| val_0[0] = ((iw7027_get_value(buf[0]) |
| ) & 0xf00) >> 8; |
| val_0[1] = (iw7027_get_value(buf[0]) |
| ) & 0xff; |
| val_0[2] = ((iw7027_get_value(buf[1]) |
| ) & 0xf00) >> 8; |
| val_0[3] = (iw7027_get_value(buf[1]) |
| ) & 0xff; |
| val_0[4] = ((iw7027_get_value(buf[2]) |
| ) & 0xf00) >> 8; |
| val_0[5] = (iw7027_get_value(buf[2]) |
| ) & 0xff; |
| val_0[6] = ((iw7027_get_value(buf[3]) |
| ) & 0xf00) >> 8; |
| val_0[7] = (iw7027_get_value(buf[3]) |
| ) & 0xff; |
| val_0[8] = ((iw7027_get_value(buf[4]) |
| ) & 0xf00) >> 8; |
| val_0[9] = (iw7027_get_value(buf[4]) |
| ) & 0xff; |
| val_0[10] = ((iw7027_get_value(buf[5]) |
| ) & 0xf00) >> 8; |
| val_0[11] = (iw7027_get_value(buf[5]) |
| ) & 0xff; |
| val_0[12] = ((iw7027_get_value(buf[6]) |
| ) & 0xf00) >> 8; |
| val_0[13] = (iw7027_get_value(buf[6]) |
| ) & 0xff; |
| val_0[14] = ((iw7027_get_value(buf[7]) |
| ) & 0xf00) >> 8; |
| val_0[15] = (iw7027_get_value(buf[7]) |
| ) & 0xff; |
| val_0[16] = ((iw7027_get_value(buf[8]) |
| ) & 0xf00) >> 8; |
| val_0[17] = (iw7027_get_value(buf[8]) |
| ) & 0xff; |
| val_0[18] = ((iw7027_get_value(buf[9]) |
| ) & 0xf00) >> 8; |
| val_0[19] = (iw7027_get_value(buf[9]) |
| ) & 0xff; |
| |
| iw7027_wregs(bl_iw7027->spi, 0x40, val_0, 20); |
| |
| 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(void) |
| { |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| |
| 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(void) |
| { |
| struct aml_ldim_driver_s *ldim_drv = aml_ldim_get_driver(); |
| |
| 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; |
| |
| /* register spi */ |
| ldim_drv->spi_dev->spi = |
| spi_setup_slave(ldim_drv->spi_dev->bus_num, |
| ldim_drv->spi_dev->chip_select, |
| ldim_drv->spi_dev->max_speed_hz, |
| ldim_drv->spi_dev->mode); |
| if (ldim_drv->spi_dev->spi == NULL) { |
| LDIMERR("register ldim_dev spi driver failed\n"); |
| return -1; |
| } |
| spi_cs_deactivate(ldim_drv->spi_dev->spi); |
| |
| bl_iw7027->spi = ldim_drv->spi_dev->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; |
| iw7027_ldim_driver_update(); |
| |
| return 0; |
| } |
| |
| int ldim_dev_iw7027_remove(void) |
| { |
| if (bl_iw7027) { |
| free(bl_iw7027); |
| bl_iw7027 = NULL; |
| } |
| return 0; |
| } |
| #endif |
| |