src/drivers/framebuffer/exynos5.c

/*
 * Copyright 2016 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 <stdint.h>

#include "base/cleanup.h"
#include "base/container_of.h"
#include "base/io.h"
#include "base/xalloc.h"
#include "drivers/framebuffer/exynos5.h"

enum {
	Exynos5FimdVidcon0Envid = 2,
	Exynos5FimdVidcon0EnvidF = 1
};

enum {
	Exynos5FimdWinconEnwinF = 1
};

static int exynos5_framebuffer_prepare(FrameBufferOps *me, FrameBuffer *buf)
{
	Exynos5Framebuffer *fb = container_of(me, Exynos5Framebuffer, ops);

	if (!fb->initialized) {
		cleanup_add(&fb->cleanup);
		fb->initialized = 1;
	}

	return framebuffer_read_from_fwdb(buf);
}

int exynos5_framebuffer_disable(Exynos5Framebuffer *fb)
{
	uint32_t *fimd_vidcon0 = (uint32_t *)(fb->base + 0);
	uint32_t *fimd_shadowcon = (uint32_t *)(fb->base + 0x34);

	// Disable video output and control signals.
	uint32_t vidcon0 = read32(fimd_vidcon0);
	vidcon0 &= ~(Exynos5FimdVidcon0Envid | Exynos5FimdVidcon0EnvidF);
	write32(fimd_vidcon0, vidcon0);

	// Disable all channels.
	write32(fimd_shadowcon, 0);

	fb->initialized = 0;
	return 0;
}

static int exynos5_framebuffer_cleanup(DcEvent *me)
{
	Exynos5Framebuffer *fb =
		container_of(me, Exynos5Framebuffer, cleanup.event);

	return exynos5_framebuffer_disable(fb);
}

Exynos5Framebuffer *new_exynos5_framebuffer(uintptr_t base)
{
	Exynos5Framebuffer *fb = xzalloc(sizeof(*fb));

	fb->ops.prepare = &exynos5_framebuffer_prepare;

	fb->cleanup.types = CleanupOnHandoff | CleanupOnLegacy;
	fb->cleanup.event.trigger = &exynos5_framebuffer_cleanup;

	fb->base = base;

	return fb;
}