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/*
* (C) Copyright 2012 CompuLab, Ltd. <www.compulab.co.il>
*
* Authors: Nikita Kiryanov <nikita@compulab.co.il>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <common.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <stdio_dev.h>
#include <asm/arch/dss.h>
#include <lcd.h>
#include <asm/arch-omap3/dss.h>
DECLARE_GLOBAL_DATA_PTR;
enum display_type {
NONE,
DVI,
};
#define CMAP_ADDR 0x80100000
/*
* The frame buffer is allocated before we have the chance to parse user input.
* To make sure enough memory is allocated for all resolutions, we define
* vl_{col | row} to the maximal resolution supported by OMAP3.
*/
vidinfo_t panel_info = {
.vl_col = 1400,
.vl_row = 1050,
.vl_bpix = LCD_BPP,
.cmap = (ushort *)CMAP_ADDR,
};
static struct panel_config panel_cfg;
static enum display_type lcd_def;
/*
* A note on DVI presets;
* U-Boot can convert 8 bit BMP data to 16 bit BMP data, and OMAP DSS can
* convert 16 bit data into 24 bit data. Thus, GFXFORMAT_RGB16 allows us to
* support two BMP types with one setting.
*/
static const struct panel_config preset_dvi_640X480 = {
.lcd_size = PANEL_LCD_SIZE(640, 480),
.timing_h = DSS_HBP(48) | DSS_HFP(16) | DSS_HSW(96),
.timing_v = DSS_VBP(33) | DSS_VFP(10) | DSS_VSW(2),
.divisor = 12 | (1 << 16),
.data_lines = LCD_INTERFACE_24_BIT,
.panel_type = ACTIVE_DISPLAY,
.load_mode = 2,
.gfx_format = GFXFORMAT_RGB16,
};
static const struct panel_config preset_dvi_800X600 = {
.lcd_size = PANEL_LCD_SIZE(800, 600),
.timing_h = DSS_HBP(88) | DSS_HFP(40) | DSS_HSW(128),
.timing_v = DSS_VBP(23) | DSS_VFP(1) | DSS_VSW(4),
.divisor = 8 | (1 << 16),
.data_lines = LCD_INTERFACE_24_BIT,
.panel_type = ACTIVE_DISPLAY,
.load_mode = 2,
.gfx_format = GFXFORMAT_RGB16,
};
static const struct panel_config preset_dvi_1024X768 = {
.lcd_size = PANEL_LCD_SIZE(1024, 768),
.timing_h = DSS_HBP(160) | DSS_HFP(24) | DSS_HSW(136),
.timing_v = DSS_VBP(29) | DSS_VFP(3) | DSS_VSW(6),
.divisor = 5 | (1 << 16),
.data_lines = LCD_INTERFACE_24_BIT,
.panel_type = ACTIVE_DISPLAY,
.load_mode = 2,
.gfx_format = GFXFORMAT_RGB16,
};
static const struct panel_config preset_dvi_1152X864 = {
.lcd_size = PANEL_LCD_SIZE(1152, 864),
.timing_h = DSS_HBP(256) | DSS_HFP(64) | DSS_HSW(128),
.timing_v = DSS_VBP(32) | DSS_VFP(1) | DSS_VSW(3),
.divisor = 3 | (1 << 16),
.data_lines = LCD_INTERFACE_24_BIT,
.panel_type = ACTIVE_DISPLAY,
.load_mode = 2,
.gfx_format = GFXFORMAT_RGB16,
};
static const struct panel_config preset_dvi_1280X960 = {
.lcd_size = PANEL_LCD_SIZE(1280, 960),
.timing_h = DSS_HBP(312) | DSS_HFP(96) | DSS_HSW(112),
.timing_v = DSS_VBP(36) | DSS_VFP(1) | DSS_VSW(3),
.divisor = 3 | (1 << 16),
.data_lines = LCD_INTERFACE_24_BIT,
.panel_type = ACTIVE_DISPLAY,
.load_mode = 2,
.gfx_format = GFXFORMAT_RGB16,
};
static const struct panel_config preset_dvi_1280X1024 = {
.lcd_size = PANEL_LCD_SIZE(1280, 1024),
.timing_h = DSS_HBP(248) | DSS_HFP(48) | DSS_HSW(112),
.timing_v = DSS_VBP(38) | DSS_VFP(1) | DSS_VSW(3),
.divisor = 3 | (1 << 16),
.data_lines = LCD_INTERFACE_24_BIT,
.panel_type = ACTIVE_DISPLAY,
.load_mode = 2,
.gfx_format = GFXFORMAT_RGB16,
};
/*
* set_resolution_params()
*
* Due to usage of multiple display related APIs resolution data is located in
* more than one place. This function updates them all.
*/
static void set_resolution_params(int x, int y)
{
panel_cfg.lcd_size = PANEL_LCD_SIZE(x, y);
panel_info.vl_col = x;
panel_info.vl_row = y;
lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
}
static void set_preset(const struct panel_config preset, int x_res, int y_res)
{
panel_cfg = preset;
set_resolution_params(x_res, y_res);
}
static enum display_type set_dvi_preset(const struct panel_config preset,
int x_res, int y_res)
{
set_preset(preset, x_res, y_res);
return DVI;
}
/*
* env_parse_displaytype() - parse display type.
*
* Parses the environment variable "displaytype", which contains the
* name of the display type or preset, in which case it applies its
* configurations.
*
* Returns the type of display that was specified.
*/
static enum display_type env_parse_displaytype(char *displaytype)
{
if (!strncmp(displaytype, "dvi640x480", 10))
return set_dvi_preset(preset_dvi_640X480, 640, 480);
else if (!strncmp(displaytype, "dvi800x600", 10))
return set_dvi_preset(preset_dvi_800X600, 800, 600);
else if (!strncmp(displaytype, "dvi1024x768", 11))
return set_dvi_preset(preset_dvi_1024X768, 1024, 768);
else if (!strncmp(displaytype, "dvi1152x864", 11))
return set_dvi_preset(preset_dvi_1152X864, 1152, 864);
else if (!strncmp(displaytype, "dvi1280x960", 11))
return set_dvi_preset(preset_dvi_1280X960, 1280, 960);
else if (!strncmp(displaytype, "dvi1280x1024", 12))
return set_dvi_preset(preset_dvi_1280X1024, 1280, 1024);
return NONE;
}
int lcd_line_length;
int lcd_color_fg;
int lcd_color_bg;
void *lcd_base;
short console_col;
short console_row;
void *lcd_console_address;
void lcd_ctrl_init(void *lcdbase)
{
struct prcm *prcm = (struct prcm *)PRCM_BASE;
char *displaytype = getenv("displaytype");
if (displaytype == NULL)
return;
lcd_def = env_parse_displaytype(displaytype);
if (lcd_def == NONE)
return;
panel_cfg.frame_buffer = lcdbase;
omap3_dss_panel_config(&panel_cfg);
/*
* Pixel clock is defined with many divisions and only few
* multiplications of the system clock. Since DSS FCLK divisor is set
* to 16 by default, we need to set it to a smaller value, like 3
* (chosen via trial and error).
*/
clrsetbits_le32(&prcm->clksel_dss, 0xF, 3);
}
void lcd_enable(void)
{
if (lcd_def == DVI) {
gpio_direction_output(54, 0); /* Turn on DVI */
omap3_dss_enable();
}
}
void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) {}
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