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/*
* Copyright (c) 2011 The Chromium OS Authors.
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <lcd.h>
#include <fdt_decode.h>
#include <asm/clocks.h>
#include <asm/arch/clock.h>
#include <asm/arch/gpio.h>
#include <asm/arch/pinmux.h>
#include <asm/arch-tegra/power.h>
#include <asm/arch-tegra/pwfm.h>
#include <asm/arch-tegra/display.h>
#include <asm/system.h>
DECLARE_GLOBAL_DATA_PTR;
/* These are the stages we go throuh in enabling the LCD */
enum stage_t {
STAGE_START,
STAGE_LVDS,
STAGE_BACKLIGHT_VDD,
STAGE_PWFM,
STAGE_BACKLIGHT_EN,
STAGE_DONE,
};
static enum stage_t stage; /* Current stage we are at */
static unsigned long timer_next; /* Time we can move onto next stage */
static struct fdt_lcd config; /* Our LCD config, set up in handle_stage() */
enum {
/* Maximum LCD size we support */
LCD_MAX_WIDTH = 1366,
LCD_MAX_HEIGHT = 768,
LCD_MAX_LOG2_BPP = 4, /* 16 bpp */
};
int lcd_line_length;
int lcd_color_fg;
int lcd_color_bg;
void *lcd_base; /* Start of framebuffer memory */
void *lcd_console_address; /* Start of console buffer */
short console_col;
short console_row;
vidinfo_t panel_info = {
/* Insert a value here so that we don't end up in the BSS */
.vl_col = -1,
};
char lcd_cursor_enabled; /* set initial value to false */
ushort lcd_cursor_width;
ushort lcd_cursor_height;
static void clk_init(void)
{
/* TODO: Put this into the FDT when we have clock support there */
clock_start_periph_pll(PERIPH_ID_3D, CLOCK_ID_MEMORY, CLK_300M);
clock_start_periph_pll(PERIPH_ID_2D, CLOCK_ID_MEMORY, CLK_300M);
clock_start_periph_pll(PERIPH_ID_HOST1X, CLOCK_ID_PERIPH, CLK_144M);
clock_start_periph_pll(PERIPH_ID_DISP1, CLOCK_ID_CGENERAL, CLK_600M);
clock_start_periph_pll(PERIPH_ID_PWM, CLOCK_ID_SFROM32KHZ, CLK_32768);
}
/*
* The PINMUX macro is used per board to setup the pinmux configuration.
*/
#define PINMUX(grp, mux, pupd, tri) \
{PINGRP_##grp, PMUX_FUNC_##mux, PMUX_PULL_##pupd, PMUX_TRI_##tri}
struct pingroup_config pinmux_cros_1[] = {
PINMUX(GPU, PWM, NORMAL, NORMAL),
PINMUX(LD0, DISPA, NORMAL, NORMAL),
PINMUX(LD1, DISPA, NORMAL, NORMAL),
PINMUX(LD10, DISPA, NORMAL, NORMAL),
PINMUX(LD11, DISPA, NORMAL, NORMAL),
PINMUX(LD12, DISPA, NORMAL, NORMAL),
PINMUX(LD13, DISPA, NORMAL, NORMAL),
PINMUX(LD14, DISPA, NORMAL, NORMAL),
PINMUX(LD15, DISPA, NORMAL, NORMAL),
PINMUX(LD16, DISPA, NORMAL, NORMAL),
PINMUX(LD17, DISPA, NORMAL, NORMAL),
PINMUX(LD2, DISPA, NORMAL, NORMAL),
PINMUX(LD3, DISPA, NORMAL, NORMAL),
PINMUX(LD4, DISPA, NORMAL, NORMAL),
PINMUX(LD5, DISPA, NORMAL, NORMAL),
PINMUX(LD6, DISPA, NORMAL, NORMAL),
PINMUX(LD7, DISPA, NORMAL, NORMAL),
PINMUX(LD8, DISPA, NORMAL, NORMAL),
PINMUX(LD9, DISPA, NORMAL, NORMAL),
PINMUX(LDI, DISPA, NORMAL, NORMAL),
PINMUX(LHP0, DISPA, NORMAL, NORMAL),
PINMUX(LHP1, DISPA, NORMAL, NORMAL),
PINMUX(LHP2, DISPA, NORMAL, NORMAL),
PINMUX(LHS, DISPA, NORMAL, NORMAL),
PINMUX(LM0, RSVD4, NORMAL, NORMAL),
PINMUX(LPP, DISPA, NORMAL, NORMAL),
PINMUX(LPW0, RSVD4, NORMAL, NORMAL),
PINMUX(LPW1, RSVD4, NORMAL, TRISTATE),
PINMUX(LPW2, RSVD4, NORMAL, NORMAL),
PINMUX(LSC0, DISPA, NORMAL, NORMAL),
PINMUX(LSPI, DISPA, NORMAL, NORMAL),
PINMUX(LVP1, DISPA, NORMAL, NORMAL),
PINMUX(LVS, DISPA, NORMAL, NORMAL),
PINMUX(SLXD, SPDIF, NORMAL, NORMAL),
};
/* Initialize the Tegra LCD panel and controller */
void init_lcd(struct fdt_lcd *config)
{
clk_init();
power_enable_partition(POWERP_3D);
tegra2_display_register(config);
}
void lcd_cursor_size(ushort width, ushort height)
{
lcd_cursor_width = width;
lcd_cursor_height = height;
}
void lcd_toggle_cursor(void)
{
ushort x, y;
uchar *dest;
ushort row;
x = console_col * lcd_cursor_width;
y = console_row * lcd_cursor_height;
dest = (uchar *)(lcd_base + y * lcd_line_length + x * (1 << LCD_BPP) /
8);
for (row = 0; row < lcd_cursor_height; ++row, dest += lcd_line_length) {
ushort *d = (ushort *)dest;
ushort color;
int i;
for (i = 0; i < lcd_cursor_width; ++i) {
color = *d;
color ^= lcd_color_fg;
*d = color;
++d;
}
}
}
void lcd_cursor_on(void)
{
lcd_cursor_enabled = 1;
lcd_toggle_cursor();
}
void lcd_cursor_off(void)
{
lcd_cursor_enabled = 0;
lcd_toggle_cursor();
}
char lcd_is_cursor_enabled(void)
{
return lcd_cursor_enabled;
}
static void update_panel_size(struct fdt_lcd *config)
{
panel_info.vl_col = config->width;
panel_info.vl_row = config->height;
panel_info.vl_bpix = config->log2_bpp;
}
/*
* Main init function called by lcd driver.
* Inits and then prints test pattern if required.
*/
void lcd_ctrl_init(void *lcdbase)
{
int line_length, size;
/*
* The framebuffer address should be specified in the device tree.
* This FDT value should be the same as the one defined in Linux kernel;
* otherwise, it causes screen flicker. The FDT value overrides the
* framebuffer allocated at the top of memory by board_init_f().
*
* If the framebuffer address is not defined in the FDT, falls back to
* use the address allocated by board_init_f().
*/
if (config.frame_buffer != ADDR_T_NONE) {
gd->fb_base = config.frame_buffer;
lcd_base = (void *)(gd->fb_base);
} else {
config.frame_buffer = (u32)lcd_base;
}
/* Make sure that we can acommodate the selected LCD */
assert(config.width <= LCD_MAX_WIDTH);
assert(config.height <= LCD_MAX_HEIGHT);
assert(config.log2_bpp <= LCD_MAX_LOG2_BPP);
if (config.width <= LCD_MAX_WIDTH && config.height <= LCD_MAX_HEIGHT &&
config.log2_bpp <= LCD_MAX_LOG2_BPP)
update_panel_size(&config);
size = lcd_get_size(&line_length),
/* call board specific hw init */
init_lcd(&config);
/* For write-through or cache off, change the LCD memory region */
if (!(config.cache_type & FDT_LCD_CACHE_WRITE_BACK))
mmu_set_region_dcache(config.frame_buffer, size,
config.cache_type & FDT_LCD_CACHE_WRITE_THROUGH ?
DCACHE_WRITETHROUGH : DCACHE_OFF);
/* Enable flushing after LCD writes if requested */
lcd_set_flush_dcache(config.cache_type & FDT_LCD_CACHE_FLUSH);
debug("LCD frame buffer at %p\n", lcd_base);
}
ulong calc_fbsize(void)
{
return (panel_info.vl_col * panel_info.vl_row *
NBITS(panel_info.vl_bpix)) / 8;
}
void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
{
}
void lcd_early_init(const void *blob)
{
/*
* Go with the maximum size for now. We will fix this up after
* relocation. These values are only used for memory alocation.
*/
panel_info.vl_col = LCD_MAX_WIDTH;
panel_info.vl_row = LCD_MAX_HEIGHT;
panel_info.vl_bpix = LCD_MAX_LOG2_BPP;
}
static int handle_stage(const void *blob)
{
/* do the things for this stage */
switch (stage) {
case STAGE_START:
/* get panel details */
if (fdt_decode_lcd(blob, &config)) {
printf("No LCD information in device tree\n");
return -1;
}
/* TODO: put pinmux into the FDT */
pinmux_config_table(pinmux_cros_1, ARRAY_SIZE(pinmux_cros_1));
fdt_setup_gpio(&config.panel_vdd);
fdt_setup_gpio(&config.lvds_shutdown);
fdt_setup_gpio(&config.backlight_vdd);
fdt_setup_gpio(&config.backlight_en);
gpio_set_value(config.panel_vdd.gpio, 1);
break;
case STAGE_LVDS:
gpio_set_value(config.lvds_shutdown.gpio, 1);
break;
case STAGE_BACKLIGHT_VDD:
if (fdt_gpio_isvalid(&config.backlight_vdd))
gpio_set_value(config.backlight_vdd.gpio, 1);
break;
case STAGE_PWFM:
/* Enable PWM at 15/16 high, divider 1 */
pwfm_setup(config.pwfm, 1, 0xdf, 1);
break;
case STAGE_BACKLIGHT_EN:
gpio_set_value(config.backlight_en.gpio, 1);
break;
case STAGE_DONE:
break;
}
/* set up timer for next stage */
timer_next = timer_get_us() + config.panel_timings[stage] * 1000;
/* move to next stage */
stage++;
return 0;
}
int tegra_lcd_check_next_stage(const void *blob, int wait)
{
int err = 0;
if (stage == STAGE_DONE)
return 0;
bootstage_start(BOOTSTAGE_LCD_WAIT, "lcd_wait");
do {
/* wait if we need to */
debug("%s: stage %d\n", __func__, stage);
if (stage != STAGE_START) {
int delay = timer_next - timer_get_us();
if (delay > 0) {
if (wait)
udelay(delay);
else
return 0;
}
}
if (handle_stage(blob))
err = -1;
} while (wait && !err && stage != STAGE_DONE);
bootstage_accum(BOOTSTAGE_LCD_WAIT);
return err;
}
void lcd_enable(void)
{
/*
* This will be done when tegra_lcd_check_next_stage() is called
* board_late_init().
*/
}
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