path: root/drivers/media/video/s5p-tv/hdmi_drv.c

/*
 * Samsung HDMI interface driver
 *
 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
 *
 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
 *
 * 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 Foundiation. either version 2 of the License,
 * or (at your option) any later version
 */

#ifdef CONFIG_VIDEO_SAMSUNG_S5P_HDMI_DEBUG
#define DEBUG
#endif

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <media/v4l2-subdev.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/bug.h>
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>

#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>

#include "regs-hdmi.h"

MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
MODULE_DESCRIPTION("Samsung HDMI");
MODULE_LICENSE("GPL");

/* default preset configured on probe */
#define HDMI_DEFAULT_PRESET V4L2_DV_1080P60

struct hdmi_resources {
	struct clk *hdmi;
	struct clk *sclk_hdmi;
	struct clk *sclk_pixel;
	struct clk *sclk_hdmiphy;
	struct clk *hdmiphy;
	struct regulator_bulk_data *regul_bulk;
	int regul_count;
};

struct hdmi_device {
	/** base address of HDMI registers */
	void __iomem *regs;
	/** HDMI interrupt */
	unsigned int irq;
	/** pointer to device parent */
	struct device *dev;
	/** subdev generated by HDMI device */
	struct v4l2_subdev sd;
	/** V4L2 device structure */
	struct v4l2_device v4l2_dev;
	/** subdev of HDMIPHY interface */
	struct v4l2_subdev *phy_sd;
	/** configuration of current graphic mode */
	const struct hdmi_preset_conf *cur_conf;
	/** current preset */
	u32 cur_preset;
	/** other resources */
	struct hdmi_resources res;
};

struct hdmi_driver_data {
	int hdmiphy_bus;
};

struct hdmi_tg_regs {
	u8 cmd;
	u8 h_fsz_l;
	u8 h_fsz_h;
	u8 hact_st_l;
	u8 hact_st_h;
	u8 hact_sz_l;
	u8 hact_sz_h;
	u8 v_fsz_l;
	u8 v_fsz_h;
	u8 vsync_l;
	u8 vsync_h;
	u8 vsync2_l;
	u8 vsync2_h;
	u8 vact_st_l;
	u8 vact_st_h;
	u8 vact_sz_l;
	u8 vact_sz_h;
	u8 field_chg_l;
	u8 field_chg_h;
	u8 vact_st2_l;
	u8 vact_st2_h;
	u8 vsync_top_hdmi_l;
	u8 vsync_top_hdmi_h;
	u8 vsync_bot_hdmi_l;
	u8 vsync_bot_hdmi_h;
	u8 field_top_hdmi_l;
	u8 field_top_hdmi_h;
	u8 field_bot_hdmi_l;
	u8 field_bot_hdmi_h;
};

struct hdmi_core_regs {
	u8 h_blank[2];
	u8 v_blank[3];
	u8 h_v_line[3];
	u8 vsync_pol[1];
	u8 int_pro_mode[1];
	u8 v_blank_f[3];
	u8 h_sync_gen[3];
	u8 v_sync_gen1[3];
	u8 v_sync_gen2[3];
	u8 v_sync_gen3[3];
};

struct hdmi_preset_conf {
	struct hdmi_core_regs core;
	struct hdmi_tg_regs tg;
	struct v4l2_mbus_framefmt mbus_fmt;
};

/* I2C module and id for HDMIPHY */
static struct i2c_board_info hdmiphy_info = {
	I2C_BOARD_INFO("hdmiphy", 0x38),
};

static struct hdmi_driver_data hdmi_driver_data[] = {
	{ .hdmiphy_bus = 3 },
	{ .hdmiphy_bus = 8 },
};

static struct platform_device_id hdmi_driver_types[] = {
	{
		.name		= "s5pv210-hdmi",
		.driver_data	= (unsigned long)&hdmi_driver_data[0],
	}, {
		.name		= "exynos4-hdmi",
		.driver_data	= (unsigned long)&hdmi_driver_data[1],
	}, {
		/* end node */
	}
};

static const struct v4l2_subdev_ops hdmi_sd_ops;

static struct hdmi_device *sd_to_hdmi_dev(struct v4l2_subdev *sd)
{
	return container_of(sd, struct hdmi_device, sd);
}

static inline
void hdmi_write(struct hdmi_device *hdev, u32 reg_id, u32 value)
{
	writel(value, hdev->regs + reg_id);
}

static inline
void hdmi_write_mask(struct hdmi_device *hdev, u32 reg_id, u32 value, u32 mask)
{
	u32 old = readl(hdev->regs + reg_id);
	value = (value & mask) | (old & ~