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/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
*
* 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; version 2 of the License.
*
* 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.
*/
#ifndef __SOC_NVIDIA_TEGRA124_CHIP_H__
#define __SOC_NVIDIA_TEGRA124_CHIP_H__
#include <arch/cache.h>
#include <gpio.h>
#include <soc/addressmap.h>
#define EFAULT 1
#define EINVAL 2
/* this is a misuse of the device tree. We're going to let it go for now but
* we should at minimum have a struct for the display controller, since
* the chip supports two.
*/
struct soc_nvidia_tegra124_config {
u32 xres;
u32 yres;
u32 framebuffer_bits_per_pixel;
u32 color_depth;
u32 panel_bits_per_pixel;
/* there are two. It's not unimaginable that we might someday
* have two of these structs in a single mainboard.
*/
u32 display_controller;
u32 framebuffer_base;
/* Technically, we can compute this. At the same time, some platforms
* might want to specify a specific size for their own reasons. If it is
* zero the soc code will compute it as xres*yres*framebuffer_bits_per_pixel/4
*/
u32 framebuffer_size;
/* GPIOs -- all, some, or none are used. Unused ones can be ignored
* in devicetree.cb since if they are not set there they default to 0,
* and 0 for a gpio means 'unused GPIO'.
*/
gpio_t backlight_en_gpio;
gpio_t lvds_shutdown_gpio;
gpio_t backlight_vdd_gpio;
gpio_t panel_vdd_gpio;
/* required info. */
/* pwm to use to set display contrast */
int pwm;
/* timings -- five numbers, all relative to the previous
* event, not to absolute time. e.g., vdd_data_delay is the
* delay from vdd on to data, not from power on to data.
* This is stated to be four timings in the
* u-boot docs. In any event, in coreboot, we generally
* only delay long enough to let the panel wake up and then
* do the control operations -- meaning, for *coreboot*
* we probably only need the vdd_delay, but payloads may
* need the other info.
*/
/* Delay before from power on asserting vdd */
int vdd_delay_ms;
/* Delay beween pwm and backlight_en_gpio is asserted */
int pwm_to_bl_delay_ms;
/* Delay before HPD high */
int vdd_to_hpd_delay_ms;
int hpd_unplug_min_us;
int hpd_plug_min_us;
int hpd_irq_min_us;
int href_to_sync;
int hsync_width;
int hback_porch;
int hfront_porch;
int vref_to_sync;
int vsync_width;
int vback_porch;
int vfront_porch;
int pixel_clock;
/* The minimum link configuraton settings */
u32 lane_count;
u32 enhanced_framing;
u32 link_bw;
u32 drive_current;
u32 preemphasis;
u32 postcursor;
void *dc_data;
};
#endif /* __SOC_NVIDIA_TEGRA124_CHIP_H__ */
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