mirror of https://gitee.com/openkylin/linux.git
636 lines
16 KiB
C
636 lines
16 KiB
C
#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/i2c.h>
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#include <linux/types.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <linux/init.h>
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#include <linux/crc32.h>
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#define MPEG_VIDEO_TARGET_BITRATE_MAX 27000
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#define MPEG_VIDEO_MAX_BITRATE_MAX 27000
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#define MPEG_TOTAL_TARGET_BITRATE_MAX 27000
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#define MPEG_PID_MAX ((1 << 14) - 1)
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/* Addresses to scan */
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static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
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I2C_CLIENT_INSMOD;
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MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
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MODULE_AUTHOR("Andrew de Quincey");
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MODULE_LICENSE("GPL");
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static struct i2c_driver driver;
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static struct i2c_client client_template;
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enum saa6752hs_videoformat {
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SAA6752HS_VF_D1 = 0, /* standard D1 video format: 720x576 */
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SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
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SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
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SAA6752HS_VF_SIF = 3, /* SIF video format: 352x288 */
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SAA6752HS_VF_UNKNOWN,
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};
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static const struct v4l2_format v4l2_format_table[] =
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{
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[SAA6752HS_VF_D1] =
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{ .fmt = { .pix = { .width = 720, .height = 576 }}},
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[SAA6752HS_VF_2_3_D1] =
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{ .fmt = { .pix = { .width = 480, .height = 576 }}},
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[SAA6752HS_VF_1_2_D1] =
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{ .fmt = { .pix = { .width = 352, .height = 576 }}},
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[SAA6752HS_VF_SIF] =
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{ .fmt = { .pix = { .width = 352, .height = 288 }}},
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[SAA6752HS_VF_UNKNOWN] =
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{ .fmt = { .pix = { .width = 0, .height = 0}}},
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};
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struct saa6752hs_state {
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struct i2c_client client;
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struct v4l2_mpeg_compression params;
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enum saa6752hs_videoformat video_format;
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v4l2_std_id standard;
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};
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enum saa6752hs_command {
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SAA6752HS_COMMAND_RESET = 0,
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SAA6752HS_COMMAND_STOP = 1,
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SAA6752HS_COMMAND_START = 2,
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SAA6752HS_COMMAND_PAUSE = 3,
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SAA6752HS_COMMAND_RECONFIGURE = 4,
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SAA6752HS_COMMAND_SLEEP = 5,
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SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
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SAA6752HS_COMMAND_MAX
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};
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/* ---------------------------------------------------------------------- */
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static u8 PAT[] = {
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0xc2, /* i2c register */
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0x00, /* table number for encoder */
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0x47, /* sync */
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0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
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0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
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0x00, /* PSI pointer to start of table */
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0x00, /* tid(0) */
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0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
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0x00, 0x01, /* transport_stream_id(1) */
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0xc1, /* version_number(0), current_next_indicator(1) */
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0x00, 0x00, /* section_number(0), last_section_number(0) */
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0x00, 0x01, /* program_number(1) */
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0xe0, 0x00, /* PMT PID */
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0x00, 0x00, 0x00, 0x00 /* CRC32 */
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};
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static u8 PMT[] = {
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0xc2, /* i2c register */
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0x01, /* table number for encoder */
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0x47, /* sync */
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0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
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0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
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0x00, /* PSI pointer to start of table */
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0x02, /* tid(2) */
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0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
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0x00, 0x01, /* program_number(1) */
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0xc1, /* version_number(0), current_next_indicator(1) */
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0x00, 0x00, /* section_number(0), last_section_number(0) */
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0xe0, 0x00, /* PCR_PID */
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0xf0, 0x00, /* program_info_length(0) */
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0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
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0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
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0x00, 0x00, 0x00, 0x00 /* CRC32 */
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};
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static struct v4l2_mpeg_compression param_defaults =
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{
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.st_type = V4L2_MPEG_TS_2,
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.st_bitrate = {
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.mode = V4L2_BITRATE_CBR,
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.target = 7000,
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},
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.ts_pid_pmt = 16,
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.ts_pid_video = 260,
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.ts_pid_audio = 256,
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.ts_pid_pcr = 259,
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.vi_type = V4L2_MPEG_VI_2,
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.vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
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.vi_bitrate = {
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.mode = V4L2_BITRATE_VBR,
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.target = 4000,
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.max = 6000,
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},
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.au_type = V4L2_MPEG_AU_2_II,
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.au_bitrate = {
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.mode = V4L2_BITRATE_CBR,
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.target = 256,
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},
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};
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/* ---------------------------------------------------------------------- */
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static int saa6752hs_chip_command(struct i2c_client* client,
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enum saa6752hs_command command)
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{
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unsigned char buf[3];
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unsigned long timeout;
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int status = 0;
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/* execute the command */
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switch(command) {
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case SAA6752HS_COMMAND_RESET:
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buf[0] = 0x00;
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break;
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case SAA6752HS_COMMAND_STOP:
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buf[0] = 0x03;
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break;
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case SAA6752HS_COMMAND_START:
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buf[0] = 0x02;
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break;
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case SAA6752HS_COMMAND_PAUSE:
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buf[0] = 0x04;
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break;
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case SAA6752HS_COMMAND_RECONFIGURE:
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buf[0] = 0x05;
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break;
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case SAA6752HS_COMMAND_SLEEP:
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buf[0] = 0x06;
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break;
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case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
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buf[0] = 0x07;
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break;
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default:
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return -EINVAL;
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}
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/* set it and wait for it to be so */
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i2c_master_send(client, buf, 1);
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timeout = jiffies + HZ * 3;
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for (;;) {
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/* get the current status */
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buf[0] = 0x10;
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i2c_master_send(client, buf, 1);
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i2c_master_recv(client, buf, 1);
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if (!(buf[0] & 0x20))
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break;
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if (time_after(jiffies,timeout)) {
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status = -ETIMEDOUT;
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break;
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}
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msleep(10);
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}
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/* delay a bit to let encoder settle */
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msleep(50);
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return status;
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}
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static int saa6752hs_set_bitrate(struct i2c_client* client,
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struct v4l2_mpeg_compression* params)
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{
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u8 buf[3];
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/* set the bitrate mode */
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buf[0] = 0x71;
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buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
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i2c_master_send(client, buf, 2);
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/* set the video bitrate */
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if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
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/* set the target bitrate */
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buf[0] = 0x80;
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buf[1] = params->vi_bitrate.target >> 8;
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buf[2] = params->vi_bitrate.target & 0xff;
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i2c_master_send(client, buf, 3);
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/* set the max bitrate */
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buf[0] = 0x81;
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buf[1] = params->vi_bitrate.max >> 8;
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buf[2] = params->vi_bitrate.max & 0xff;
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i2c_master_send(client, buf, 3);
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} else {
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/* set the target bitrate (no max bitrate for CBR) */
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buf[0] = 0x81;
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buf[1] = params->vi_bitrate.target >> 8;
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buf[2] = params->vi_bitrate.target & 0xff;
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i2c_master_send(client, buf, 3);
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}
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/* set the audio bitrate */
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buf[0] = 0x94;
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buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
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i2c_master_send(client, buf, 2);
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/* set the total bitrate */
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buf[0] = 0xb1;
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buf[1] = params->st_bitrate.target >> 8;
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buf[2] = params->st_bitrate.target & 0xff;
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i2c_master_send(client, buf, 3);
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return 0;
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}
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static void saa6752hs_set_subsampling(struct i2c_client* client,
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struct v4l2_format* f)
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{
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struct saa6752hs_state *h = i2c_get_clientdata(client);
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int dist_352, dist_480, dist_720;
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/*
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FIXME: translate and round width/height into EMPRESS
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subsample type:
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type | PAL | NTSC
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---------------------------
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SIF | 352x288 | 352x240
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1/2 D1 | 352x576 | 352x480
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2/3 D1 | 480x576 | 480x480
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D1 | 720x576 | 720x480
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*/
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dist_352 = abs(f->fmt.pix.width - 352);
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dist_480 = abs(f->fmt.pix.width - 480);
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dist_720 = abs(f->fmt.pix.width - 720);
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if (dist_720 < dist_480) {
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f->fmt.pix.width = 720;
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f->fmt.pix.height = 576;
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h->video_format = SAA6752HS_VF_D1;
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}
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else if (dist_480 < dist_352) {
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f->fmt.pix.width = 480;
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f->fmt.pix.height = 576;
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h->video_format = SAA6752HS_VF_2_3_D1;
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}
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else {
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f->fmt.pix.width = 352;
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if (abs(f->fmt.pix.height - 576) <
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abs(f->fmt.pix.height - 288)) {
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f->fmt.pix.height = 576;
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h->video_format = SAA6752HS_VF_1_2_D1;
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}
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else {
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f->fmt.pix.height = 288;
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h->video_format = SAA6752HS_VF_SIF;
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}
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}
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}
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static void saa6752hs_set_params(struct i2c_client* client,
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struct v4l2_mpeg_compression* params)
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{
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struct saa6752hs_state *h = i2c_get_clientdata(client);
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/* check PIDs */
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if (params->ts_pid_pmt <= MPEG_PID_MAX)
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h->params.ts_pid_pmt = params->ts_pid_pmt;
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if (params->ts_pid_pcr <= MPEG_PID_MAX)
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h->params.ts_pid_pcr = params->ts_pid_pcr;
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if (params->ts_pid_video <= MPEG_PID_MAX)
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h->params.ts_pid_video = params->ts_pid_video;
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if (params->ts_pid_audio <= MPEG_PID_MAX)
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h->params.ts_pid_audio = params->ts_pid_audio;
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/* check bitrate parameters */
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if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
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(params->vi_bitrate.mode == V4L2_BITRATE_VBR))
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h->params.vi_bitrate.mode = params->vi_bitrate.mode;
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if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
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h->params.st_bitrate.target = params->st_bitrate.target;
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if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
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h->params.vi_bitrate.target = params->vi_bitrate.target;
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if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
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h->params.vi_bitrate.max = params->vi_bitrate.max;
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if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
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h->params.au_bitrate.target = params->au_bitrate.target;
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/* aspect ratio */
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if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
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params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
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h->params.vi_aspect_ratio = params->vi_aspect_ratio;
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/* range checks */
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if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
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h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
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if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
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h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
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if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
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h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
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if (h->params.au_bitrate.target <= 256)
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h->params.au_bitrate.target = 256;
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else
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h->params.au_bitrate.target = 384;
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}
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static int saa6752hs_init(struct i2c_client* client)
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{
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unsigned char buf[9], buf2[4];
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struct saa6752hs_state *h;
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u32 crc;
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unsigned char localPAT[256];
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unsigned char localPMT[256];
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h = i2c_get_clientdata(client);
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/* Set video format - must be done first as it resets other settings */
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buf[0] = 0x41;
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buf[1] = h->video_format;
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i2c_master_send(client, buf, 2);
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/* Set number of lines in input signal */
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buf[0] = 0x40;
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buf[1] = 0x00;
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if (h->standard & V4L2_STD_525_60)
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buf[1] = 0x01;
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i2c_master_send(client, buf, 2);
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/* set bitrate */
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saa6752hs_set_bitrate(client, &h->params);
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/* Set GOP structure {3, 13} */
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buf[0] = 0x72;
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buf[1] = 0x03;
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buf[2] = 0x0D;
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i2c_master_send(client,buf,3);
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/* Set minimum Q-scale {4} */
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buf[0] = 0x82;
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buf[1] = 0x04;
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i2c_master_send(client,buf,2);
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/* Set maximum Q-scale {12} */
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buf[0] = 0x83;
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buf[1] = 0x0C;
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i2c_master_send(client,buf,2);
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/* Set Output Protocol */
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buf[0] = 0xD0;
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buf[1] = 0x81;
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i2c_master_send(client,buf,2);
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/* Set video output stream format {TS} */
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buf[0] = 0xB0;
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buf[1] = 0x05;
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i2c_master_send(client,buf,2);
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/* compute PAT */
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memcpy(localPAT, PAT, sizeof(PAT));
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localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
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localPAT[18] = h->params.ts_pid_pmt & 0xff;
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crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
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localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
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localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
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localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
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localPAT[sizeof(PAT) - 1] = crc & 0xFF;
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/* compute PMT */
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memcpy(localPMT, PMT, sizeof(PMT));
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localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
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localPMT[4] = h->params.ts_pid_pmt & 0xff;
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localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
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localPMT[16] = h->params.ts_pid_pcr & 0xFF;
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localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
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localPMT[21] = h->params.ts_pid_video & 0xFF;
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localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
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localPMT[26] = h->params.ts_pid_audio & 0xFF;
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crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
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localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
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localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
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localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
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localPMT[sizeof(PMT) - 1] = crc & 0xFF;
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/* Set Audio PID */
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buf[0] = 0xC1;
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buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
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buf[2] = h->params.ts_pid_audio & 0xFF;
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i2c_master_send(client,buf,3);
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/* Set Video PID */
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buf[0] = 0xC0;
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buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
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buf[2] = h->params.ts_pid_video & 0xFF;
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i2c_master_send(client,buf,3);
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/* Set PCR PID */
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buf[0] = 0xC4;
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buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
|
|
buf[2] = h->params.ts_pid_pcr & 0xFF;
|
|
i2c_master_send(client,buf,3);
|
|
|
|
/* Send SI tables */
|
|
i2c_master_send(client,localPAT,sizeof(PAT));
|
|
i2c_master_send(client,localPMT,sizeof(PMT));
|
|
|
|
/* mute then unmute audio. This removes buzzing artefacts */
|
|
buf[0] = 0xa4;
|
|
buf[1] = 1;
|
|
i2c_master_send(client, buf, 2);
|
|
buf[1] = 0;
|
|
i2c_master_send(client, buf, 2);
|
|
|
|
/* start it going */
|
|
saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
|
|
|
|
/* readout current state */
|
|
buf[0] = 0xE1;
|
|
buf[1] = 0xA7;
|
|
buf[2] = 0xFE;
|
|
buf[3] = 0x82;
|
|
buf[4] = 0xB0;
|
|
i2c_master_send(client, buf, 5);
|
|
i2c_master_recv(client, buf2, 4);
|
|
|
|
/* change aspect ratio */
|
|
buf[0] = 0xE0;
|
|
buf[1] = 0xA7;
|
|
buf[2] = 0xFE;
|
|
buf[3] = 0x82;
|
|
buf[4] = 0xB0;
|
|
buf[5] = buf2[0];
|
|
switch(h->params.vi_aspect_ratio) {
|
|
case V4L2_MPEG_ASPECT_16_9:
|
|
buf[6] = buf2[1] | 0x40;
|
|
break;
|
|
case V4L2_MPEG_ASPECT_4_3:
|
|
default:
|
|
buf[6] = buf2[1] & 0xBF;
|
|
break;
|
|
break;
|
|
}
|
|
buf[7] = buf2[2];
|
|
buf[8] = buf2[3];
|
|
i2c_master_send(client, buf, 9);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
|
|
{
|
|
struct saa6752hs_state *h;
|
|
|
|
|
|
if (NULL == (h = kzalloc(sizeof(*h), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
h->client = client_template;
|
|
h->params = param_defaults;
|
|
h->client.adapter = adap;
|
|
h->client.addr = addr;
|
|
|
|
/* Assume 625 input lines */
|
|
h->standard = 0;
|
|
|
|
i2c_set_clientdata(&h->client, h);
|
|
i2c_attach_client(&h->client);
|
|
|
|
v4l_info(&h->client,"saa6752hs: chip found @ 0x%x\n", addr<<1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int saa6752hs_probe(struct i2c_adapter *adap)
|
|
{
|
|
if (adap->class & I2C_CLASS_TV_ANALOG)
|
|
return i2c_probe(adap, &addr_data, saa6752hs_attach);
|
|
return 0;
|
|
}
|
|
|
|
static int saa6752hs_detach(struct i2c_client *client)
|
|
{
|
|
struct saa6752hs_state *h;
|
|
|
|
h = i2c_get_clientdata(client);
|
|
i2c_detach_client(client);
|
|
kfree(h);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
|
|
{
|
|
struct saa6752hs_state *h = i2c_get_clientdata(client);
|
|
struct v4l2_mpeg_compression *params = arg;
|
|
int err = 0;
|
|
|
|
switch (cmd) {
|
|
case VIDIOC_S_MPEGCOMP:
|
|
if (NULL == params) {
|
|
/* apply settings and start encoder */
|
|
saa6752hs_init(client);
|
|
break;
|
|
}
|
|
saa6752hs_set_params(client, params);
|
|
/* fall through */
|
|
case VIDIOC_G_MPEGCOMP:
|
|
*params = h->params;
|
|
break;
|
|
case VIDIOC_G_FMT:
|
|
{
|
|
struct v4l2_format *f = arg;
|
|
|
|
if (h->video_format == SAA6752HS_VF_UNKNOWN)
|
|
h->video_format = SAA6752HS_VF_D1;
|
|
f->fmt.pix.width =
|
|
v4l2_format_table[h->video_format].fmt.pix.width;
|
|
f->fmt.pix.height =
|
|
v4l2_format_table[h->video_format].fmt.pix.height;
|
|
break ;
|
|
}
|
|
case VIDIOC_S_FMT:
|
|
{
|
|
struct v4l2_format *f = arg;
|
|
|
|
saa6752hs_set_subsampling(client, f);
|
|
break;
|
|
}
|
|
case VIDIOC_S_STD:
|
|
h->standard = *((v4l2_std_id *) arg);
|
|
break;
|
|
default:
|
|
/* nothing */
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static struct i2c_driver driver = {
|
|
.driver = {
|
|
.name = "saa6752hs",
|
|
},
|
|
.id = I2C_DRIVERID_SAA6752HS,
|
|
.attach_adapter = saa6752hs_probe,
|
|
.detach_client = saa6752hs_detach,
|
|
.command = saa6752hs_command,
|
|
};
|
|
|
|
static struct i2c_client client_template =
|
|
{
|
|
.name = "saa6752hs",
|
|
.driver = &driver,
|
|
};
|
|
|
|
static int __init saa6752hs_init_module(void)
|
|
{
|
|
return i2c_add_driver(&driver);
|
|
}
|
|
|
|
static void __exit saa6752hs_cleanup_module(void)
|
|
{
|
|
i2c_del_driver(&driver);
|
|
}
|
|
|
|
module_init(saa6752hs_init_module);
|
|
module_exit(saa6752hs_cleanup_module);
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|