src/vboot/callbacks/display.c

/*
 * Copyright 2012 Google Inc.
 *
 * 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 <assert.h>
#include <libpayload.h>
#include <sysinfo.h>
#include <vboot_api.h>
#include <vboot_struct.h>

#include "base/cleanup_funcs.h"
#include "drivers/video/coreboot_fb.h"
#include "drivers/video/display.h"
#include "vboot/firmware_id.h"
#include "vboot/util/commonparams.h"
#include "vboot/screens.h"

VbError_t VbExDisplayInit(uint32_t *width, uint32_t *height)
{
	const struct rgb_color rgb = { .red = 0, .green = 0, .blue = 0 };
	if (clear_screen(&rgb))
		return VBERROR_UNKNOWN;

	if (gbb_copy_in_bmp_block())
		return VBERROR_UNKNOWN;

	if (lib_sysinfo.framebuffer) {
		*width = lib_sysinfo.framebuffer->x_resolution;
		*height = lib_sysinfo.framebuffer->y_resolution;
	} else {
		*width = *height = 0;
	}

	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayBacklight(uint8_t enable)
{
	if (backlight_update(enable))
		return VBERROR_UNKNOWN;

	return VBERROR_SUCCESS;
}

static void print_string(const char *str)
{
	int str_len = strlen(str);
	while (str_len--) {
		if (*str == '\n')
			video_console_putchar('\r');
		video_console_putchar(*str++);
	}
}

static void print_string_newline(const char *str)
{
	print_string(str);
	print_string("\n");
}

void print_on_center(const char *msg)
{
	unsigned int rows, cols;
	video_get_rows_cols(&rows, &cols);
	video_console_set_cursor((cols - strlen(msg)) / 2, rows / 2);
	print_string(msg);
}

VbError_t VbExDisplayScreen(uint32_t screen_type)
{
	const char *msg = NULL;

	if (vboot_draw_screen(screen_type) == CBGFX_SUCCESS)
		return VBERROR_SUCCESS;

	/*
	 * Show the debug messages for development. It is a backup method
	 * when GBB does not contain a full set of bitmaps.
	 */
	switch (screen_type) {
	case VB_SCREEN_BLANK:
		// clear the screen
		video_console_clear();
		break;
	case VB_SCREEN_DEVELOPER_WARNING:
		msg = "developer mode warning";
		break;
	case VB_SCREEN_DEVELOPER_EGG:
		msg = "easter egg";
		break;
	case VB_SCREEN_RECOVERY_REMOVE:
		msg = "remove inserted devices";
		break;
	case VB_SCREEN_RECOVERY_INSERT:
		msg = "insert recovery image";
		break;
	case VB_SCREEN_RECOVERY_NO_GOOD:
		msg = "insert image invalid";
		break;
	case VB_SCREEN_WAIT:
		msg = "wait for ec update";
		break;
	default:
		printf("Not a valid screen type: %d.\n", screen_type);
		return VBERROR_INVALID_SCREEN_INDEX;
	}

	if (msg)
		print_on_center(msg);

	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayImage(uint32_t x, uint32_t y,
			   void *buffer, uint32_t buffersize)
{
	if (dc_corebootfb_draw_bitmap(x, y, buffer))
		return VBERROR_UNKNOWN;

	return VBERROR_SUCCESS;
}

VbError_t VbExDisplaySetDimension(uint32_t width, uint32_t height)
{
	// TODO(hungte) Shift or scale images if width/height is not equal to
	// lib_sysinfo.framebuffer->{x,y}_resolution.
	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayDebugInfo(const char *info_str)
{
	video_console_set_cursor(0, 0);
	print_string(info_str);

	print_string("read-only firmware id: ");
	print_string_newline(get_ro_fw_id());

	print_string("active firmware id: ");
	const char *id = get_active_fw_id();
	if (id == NULL)
		id = "NOT FOUND";
	print_string_newline(id);

	return VBERROR_SUCCESS;
}