blob: e6ad539e36aa8ed4c2ed3207c918d7907ab47fc3 [file] [log] [blame]
/*
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Code Aurora nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <debug.h>
#include <dev/gpio.h>
#include <kernel/thread.h>
#include <platform/gpio.h>
#include <dev/lcdc.h>
#define GPIO_SET_OUT_VAL(gpio,val) (gpio_set(gpio,(val)<<1))
#define LCDC_SPI_GPIO_CLK 73
#define LCDC_SPI_GPIO_CS 72
#define LCDC_SPI_GPIO_MOSI 70
/* panel cmd addresses */
#define PANEL_CMD_SLEEP_OUT 0x1100
#define PANEL_CMD_RGBCTRL 0x3B00
#define PANEL_CMD_DISP_ON 0x2900
#define PANEL_CMD_BCTRL 0x5300
#define PANEL_CMD_PWM_EN 0x6A17
#define PANEL_CMD_FORMAT 0x3A00
#define PANEL_CMD_CABC_FORCE2 0x6A18 /* backlight level */
/* timing info */
static struct lcdc_timing_parameters param = {
.lcdc_fb_width = 480,
.lcdc_fb_height = 800,
.lcdc_hsync_pulse_width_dclk = 2,
.lcdc_hsync_back_porch_dclk = 14,
.lcdc_hsync_front_porch_dclk = 16,
.lcdc_hsync_skew_dclk = 0,
.lcdc_vsync_pulse_width_lines = 2,
.lcdc_vsync_back_porch_lines = 1,
.lcdc_vsync_front_porch_lines = 28,
};
struct lcdc_timing_parameters *auo_timing_param()
{
return &param;
}
/* spi commands */
static void auo_spi_write_byte(uint32_t data)
{
uint32_t bit;
uint32_t bnum;
bnum = 8;
bit = 0x80;
while (bnum--) {
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_CLK, 0);
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_MOSI, (data & bit) ? 1 : 0);
udelay(1);
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_CLK, 1);
udelay(1);
bit >>= 1;
}
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_MOSI, 0);
}
static uint32_t auo_serigo(uint32_t * input_data, uint32_t input_len)
{
uint32_t i;
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_CS, 0);
udelay(2);
for (i = 0; i < input_len; ++i) {
auo_spi_write_byte(input_data[i]);
udelay(2);
}
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_CS, 1);
return 0;
}
static void auo_write_cmd(uint32_t cmd)
{
uint32_t local_data[4];
local_data[0] = 0x20;
local_data[1] = (uint32_t) (cmd >> 8);
local_data[2] = 0;
local_data[3] = (uint32_t) cmd;
auo_serigo(local_data, 4);
}
static void auo_write_cmd_param(uint32_t cmd, uint32_t param)
{
uint32_t local_data[6];
local_data[0] = 0x20;
local_data[1] = (uint32_t) (cmd >> 8);
local_data[2] = 0;
local_data[3] = (uint32_t) cmd;
local_data[4] = 0x40;
local_data[5] = param;
auo_serigo(local_data, 6);
}
static void auo_spi_init(void)
{
gpio_tlmm_config(LCDC_SPI_GPIO_CLK, 0, GPIO_OUTPUT, GPIO_NO_PULL,
GPIO_2MA, 1);
gpio_tlmm_config(LCDC_SPI_GPIO_CS, 0, GPIO_OUTPUT, GPIO_NO_PULL,
GPIO_2MA, 1);
gpio_tlmm_config(LCDC_SPI_GPIO_MOSI, 0, GPIO_OUTPUT, GPIO_NO_PULL,
GPIO_2MA, 1);
/* Set the output so that we don't disturb the slave device */
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_CLK, 1);
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_MOSI, 0);
/* Set the Chip Select deasserted (active low) */
GPIO_SET_OUT_VAL(LCDC_SPI_GPIO_CS, 1);
}
/* panel initialization */
static void auo_panel_init(void)
{
auo_write_cmd(PANEL_CMD_SLEEP_OUT);
mdelay(150);
/* SET_PIXEL_FORMAT: Set how many bits per pixel are used (3A00h), 18bits */
auo_write_cmd_param(PANEL_CMD_FORMAT, 0x66);
mdelay(1);
/* RGBCTRL: RGB Interface Signal Control (3B00h) */
auo_write_cmd_param(PANEL_CMD_RGBCTRL, 0x2B);
mdelay(1);
/* Turn on display */
auo_write_cmd(PANEL_CMD_DISP_ON);
mdelay(1);
/* Turn on backlight */
auo_write_cmd_param(PANEL_CMD_BCTRL, 0x24);
mdelay(1);
/* Enable PWM level */
auo_write_cmd_param(PANEL_CMD_PWM_EN, 0x01);
mdelay(1);
/* Set backlight level to mid range level */
auo_write_cmd_param(PANEL_CMD_CABC_FORCE2, 0x77);
mdelay(10);
}
void auo_lcdc_init(void)
{
auo_spi_init();
auo_panel_init();
}