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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 Aidan MacDonald, Dana Conrad
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "lcd.h"
#include "kernel.h"
#include "lcd-x1000.h"
#include "gpio-x1000.h"
#include "system.h"
/* for reference on these command/data hex values, see the mipi dcs lcd spec. *
* Not everything here is there, but all the standard stuff is. */
static const uint32_t erosqnative_lcd_cmd_enable[] = {
/* Set EXTC? */
LCD_INSTR_CMD, 0xc8,
LCD_INSTR_DAT, 0xff,
LCD_INSTR_DAT, 0x93,
LCD_INSTR_DAT, 0x42,
/* Set Address Mode */
LCD_INSTR_CMD, 0x36,
LCD_INSTR_DAT, 0xd8,
/* Pixel Format Set */
LCD_INSTR_CMD, 0x3a,
//LCD_INSTR_DAT, 0x66, /* OF specified 18 bpp */
LCD_INSTR_DAT, 0x05, /* RB seems to be happier dealing with 16 bits/pixel */
/* Power Control 1? */
LCD_INSTR_CMD, 0xc0,
LCD_INSTR_DAT, 0x15,
LCD_INSTR_DAT, 0x15,
/* Power Control 2? */
LCD_INSTR_CMD, 0xc1,
LCD_INSTR_DAT, 0x01,
/* VCOM? */
LCD_INSTR_CMD, 0xc5,
LCD_INSTR_DAT, 0xda,
/* ?? */
LCD_INSTR_CMD, 0xb1,
LCD_INSTR_DAT, 0x00,
LCD_INSTR_DAT, 0x1b,
/* ?? */
LCD_INSTR_CMD, 0xb4,
LCD_INSTR_DAT, 0x02,
/* Positive gamma correction? */
LCD_INSTR_CMD, 0xe0,
LCD_INSTR_DAT, 0x0f,
LCD_INSTR_DAT, 0x13,
LCD_INSTR_DAT, 0x17,
LCD_INSTR_DAT, 0x04,
LCD_INSTR_DAT, 0x13,
LCD_INSTR_DAT, 0x07,
LCD_INSTR_DAT, 0x40,
LCD_INSTR_DAT, 0x39,
LCD_INSTR_DAT, 0x4f,
LCD_INSTR_DAT, 0x06,
LCD_INSTR_DAT, 0x0d,
LCD_INSTR_DAT, 0x0a,
LCD_INSTR_DAT, 0x1f,
LCD_INSTR_DAT, 0x22,
LCD_INSTR_DAT, 0x00,
/* Negative gamma correction? */
LCD_INSTR_CMD, 0xe1,
LCD_INSTR_DAT, 0x00,
LCD_INSTR_DAT, 0x21,
LCD_INSTR_DAT, 0x24,
LCD_INSTR_DAT, 0x03,
LCD_INSTR_DAT, 0x0f,
LCD_INSTR_DAT, 0x05,
LCD_INSTR_DAT, 0x38,
LCD_INSTR_DAT, 0x32,
LCD_INSTR_DAT, 0x49,
LCD_INSTR_DAT, 0x00,
LCD_INSTR_DAT, 0x09,
LCD_INSTR_DAT, 0x08,
LCD_INSTR_DAT, 0x32,
LCD_INSTR_DAT, 0x35,
LCD_INSTR_DAT, 0x0f,
/* Exit Sleep */
LCD_INSTR_CMD, 0x11,
LCD_INSTR_UDELAY, 120000,
/* Display On */
LCD_INSTR_CMD, 0x29,
LCD_INSTR_UDELAY, 20000,
LCD_INSTR_END,
};
static const uint32_t erosqnative_lcd_of_compat_cmd[] = {
/* Pixel Format Set */
LCD_INSTR_CMD, 0x3a,
LCD_INSTR_DAT, 0x66, /* 18 bpp */
/* Exit Sleep */
LCD_INSTR_CMD, 0x11,
LCD_INSTR_UDELAY, 120000,
/* Display On */
LCD_INSTR_CMD, 0x29,
LCD_INSTR_UDELAY, 20000,
LCD_INSTR_END,
};
/* sleep and wake copied directly from m3k */
static const uint32_t erosqnative_lcd_cmd_sleep[] = {
/* Display OFF */
LCD_INSTR_CMD, 0x28,
/* Sleep IN */
LCD_INSTR_CMD, 0x10,
LCD_INSTR_UDELAY, 5000,
LCD_INSTR_END,
};
static const uint32_t erosqnative_lcd_cmd_wake[] = {
/* Sleep OUT */
LCD_INSTR_CMD, 0x11,
LCD_INSTR_UDELAY, 5000,
/* Display ON */
LCD_INSTR_CMD, 0x29,
LCD_INSTR_END,
};
/* As far as I can tell, this is a sequence of commands sent before each
* DMA set. Original in OF was:
* {0x2c, 0x2c, 0x2c, 0x2c}
* But this set from the m3k seems to work the same, and makes more sense
* to me:
* {0x00, 0x00, 0x00, 0x2c}
* This command is more than likely going to be the same
* for any old mipi lcd on the market, maybe. I really don't think we need
* to send "write_memory_start four times in a row. */
static const uint8_t __attribute__((aligned(64)))
erosqnative_lcd_dma_wr_cmd[] = {0x2c, 0x2c, 0x2c, 0x2c};
const struct lcd_tgt_config lcd_tgt_config = {
.bus_width = 8,
.cmd_width = 8,
.use_6800_mode = 0,
.use_serial = 0,
.clk_polarity = 0,
.dc_polarity = 0,
.wr_polarity = 1,
.te_enable = 0, /* OF had TE enabled (1) */
.te_polarity = 1,
.te_narrow = 0,
.dma_wr_cmd_buf = &erosqnative_lcd_dma_wr_cmd,
.dma_wr_cmd_size = sizeof(erosqnative_lcd_dma_wr_cmd),
};
void lcd_tgt_enable(bool enable)
{
if(enable) {
/* power up the panel */
gpio_set_level(GPIO_LCD_PWR, 1);
mdelay(20);
gpio_set_level(GPIO_LCD_RESET, 1);
mdelay(12);
/* set the clock */
lcd_set_clock(X1000_CLK_SCLK_A, 20000000);
/* toggle chip select low (active) */
gpio_set_level(GPIO_LCD_RD, 1);
gpio_set_level(GPIO_LCD_CE, 1);
mdelay(5);
gpio_set_level(GPIO_LCD_CE, 0);
lcd_exec_commands(&erosqnative_lcd_cmd_enable[0]);
} else {
/* doesn't flash white if we don't do anything... */
#if 0
lcd_exec_commands(&erosqnative_lcd_cmd_sleep[0]);
mdelay(115); // copied from m3k
gpio_set_level(GPIO_LCD_PWR, 0);
gpio_set_level(GPIO_LCD_RESET, 0);
#endif
}
}
void lcd_tgt_enable_of(bool enable)
{
/* silence the unused parameter warning */
if (enable)
{}
lcd_exec_commands(&erosqnative_lcd_of_compat_cmd[0]);
}
void lcd_tgt_sleep(bool sleep)
{
if(sleep)
lcd_exec_commands(&erosqnative_lcd_cmd_sleep[0]);
else
lcd_exec_commands(&erosqnative_lcd_cmd_wake[0]);
}
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