path: root/drivers/media/video/saa7134/saa6752hs.c

 /*
    saa6752hs - i2c-driver for the saa6752hs by Philips

    Copyright (C) 2004 Andrew de Quincey

    AC-3 support:

    Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License vs 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., 675 Mvss Ave, Cambridge, MA 02139, USA.
  */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-i2c-drv.h>
#include <linux/init.h>
#include <linux/crc32.h>

#define MPEG_VIDEO_TARGET_BITRATE_MAX  27000
#define MPEG_VIDEO_MAX_BITRATE_MAX     27000
#define MPEG_TOTAL_TARGET_BITRATE_MAX  27000
#define MPEG_PID_MAX ((1 << 14) - 1)


MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
MODULE_AUTHOR("Andrew de Quincey");
MODULE_LICENSE("GPL");

enum saa6752hs_videoformat {
	SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
	SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
	SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
	SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
	SAA6752HS_VF_UNKNOWN,
};

struct saa6752hs_mpeg_params {
	/* transport streams */
	__u16				ts_pid_pmt;
	__u16				ts_pid_audio;
	__u16				ts_pid_video;
	__u16				ts_pid_pcr;

	/* audio */
	enum v4l2_mpeg_audio_encoding    au_encoding;
	enum v4l2_mpeg_audio_l2_bitrate  au_l2_bitrate;
	enum v4l2_mpeg_audio_ac3_bitrate au_ac3_bitrate;

	/* video */
	enum v4l2_mpeg_video_aspect	vi_aspect;
	enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
	__u32 				vi_bitrate;
	__u32 				vi_bitrate_peak;
};

static const struct v4l2_format v4l2_format_table[] =
{
	[SAA6752HS_VF_D1] =
		{ .fmt = { .pix = { .width = 720, .height = 576 }}},
	[SAA6752HS_VF_2_3_D1] =
		{ .fmt = { .pix = { .width = 480, .height = 576 }}},
	[SAA6752HS_VF_1_2_D1] =
		{ .fmt = { .pix = { .width = 352, .height = 576 }}},
	[SAA6752HS_VF_SIF] =
		{ .fmt = { .pix = { .width = 352, .height = 288 }}},
	[SAA6752HS_VF_UNKNOWN] =
		{ .fmt = { .pix = { .width = 0, .height = 0}}},
};

struct saa6752hs_state {
	struct v4l2_subdev            sd;
	int 			      chip;
	u32 			      revision;
	int 			      has_ac3;
	struct saa6752hs_mpeg_params  params;
	enum saa6752hs_videoformat    video_format;
	v4l2_std_id                   standard;
};

enum saa6752hs_command {
	SAA6752HS_COMMAND_RESET = 0,
	SAA6752HS_COMMAND_STOP = 1,
	SAA6752HS_COMMAND_START = 2,
	SAA6752HS_COMMAND_PAUSE = 3,
	SAA6752HS_COMMAND_RECONFIGURE = 4,
	SAA6752HS_COMMAND_SLEEP = 5,
	SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,

	SAA6752HS_COMMAND_MAX
};

static inline struct saa6752hs_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct saa6752hs_state, sd);
}

/* ---------------------------------------------------------------------- */

static u8 PAT[] = {
	0xc2, /* i2c register */
	0x00, /* table number for encoder */

	0x47, /* sync */
	0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
	0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */

	0x00, /* PSI pointer to start of table */

	0x00, /* tid(0) */
	0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */

	0x00, 0x01, /* transport_stream_id(1) */

	0xc1, /* version_number(0), current_next_indicator(1) */

	0x00, 0x00, /* section_number(0), last_section_number(0) */

	0x00, 0x01, /* program_number(1) */

	0xe0, 0x00, /* PMT PID */

	0x00, 0x00, 0x00, 0x00 /* CRC32 */
};

static u8 PMT[] = {
	0xc2, /* i2c register */
	0x01, /* table number for encoder */

	0x47, /* sync */
	0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
	0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */

	0x00, /* PSI pointer to start of table */

	0x02, /* tid(2) */
	0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */

	0x00, 0x01, /* program_number(1) */

	0xc1, /* version_number(0), current_next_indicator(1) */

	0x00, 0x00, /* section_number(0), last_section_number(0) */

	0xe0, 0x00, /* PCR_PID */

	0xf0, 0x00, /* program_info_length(0) */