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path: root/drivers/media/video/saa7134/saa6752hs.c
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Diffstat (limited to 'drivers/media/video/saa7134/saa6752hs.c')
-rw-r--r--drivers/media/video/saa7134/saa6752hs.c543
1 files changed, 543 insertions, 0 deletions
diff --git a/drivers/media/video/saa7134/saa6752hs.c b/drivers/media/video/saa7134/saa6752hs.c
new file mode 100644
index 000000000000..cee13584c9cf
--- /dev/null
+++ b/drivers/media/video/saa7134/saa6752hs.c
@@ -0,0 +1,543 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.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/videodev.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+
+#include <media/id.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)
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
+static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
+I2C_CLIENT_INSMOD;
+
+MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
+MODULE_AUTHOR("Andrew de Quincey");
+MODULE_LICENSE("GPL");
+
+static struct i2c_driver driver;
+static struct i2c_client client_template;
+
+struct saa6752hs_state {
+ struct i2c_client client;
+ struct v4l2_mpeg_compression params;
+};
+
+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 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)
+
+ 0x02, 0xe0, 0x00, 0xf0, 0x00, // video stream type(2), pid
+ 0x04, 0xe0, 0x00, 0xf0, 0x00, // audio stream type(4), pid
+
+ 0x00, 0x00, 0x00, 0x00 // CRC32
+};
+
+static struct v4l2_mpeg_compression param_defaults =
+{
+ .st_type = V4L2_MPEG_TS_2,
+ .st_bitrate = {
+ .mode = V4L2_BITRATE_CBR,
+ .target = 7000,
+ },
+
+ .ts_pid_pmt = 16,
+ .ts_pid_video = 260,
+ .ts_pid_audio = 256,
+ .ts_pid_pcr = 259,
+
+ .vi_type = V4L2_MPEG_VI_2,
+ .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
+ .vi_bitrate = {
+ .mode = V4L2_BITRATE_VBR,
+ .target = 4000,
+ .max = 6000,
+ },
+
+ .au_type = V4L2_MPEG_AU_2_II,
+ .au_bitrate = {
+ .mode = V4L2_BITRATE_CBR,
+ .target = 256,
+ },
+
+#if 0
+ /* FIXME: size? via S_FMT? */
+ .video_format = MPEG_VIDEO_FORMAT_D1,
+#endif
+};
+
+/* ---------------------------------------------------------------------- */
+
+static int saa6752hs_chip_command(struct i2c_client* client,
+ enum saa6752hs_command command)
+{
+ unsigned char buf[3];
+ unsigned long timeout;
+ int status = 0;
+
+ // execute the command
+ switch(command) {
+ case SAA6752HS_COMMAND_RESET:
+ buf[0] = 0x00;
+ break;
+
+ case SAA6752HS_COMMAND_STOP:
+ buf[0] = 0x03;
+ break;
+
+ case SAA6752HS_COMMAND_START:
+ buf[0] = 0x02;
+ break;
+
+ case SAA6752HS_COMMAND_PAUSE:
+ buf[0] = 0x04;
+ break;
+
+ case SAA6752HS_COMMAND_RECONFIGURE:
+ buf[0] = 0x05;
+ break;
+
+ case SAA6752HS_COMMAND_SLEEP:
+ buf[0] = 0x06;
+ break;
+
+ case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
+ buf[0] = 0x07;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ // set it and wait for it to be so
+ i2c_master_send(client, buf, 1);
+ timeout = jiffies + HZ * 3;
+ for (;;) {
+ // get the current status
+ buf[0] = 0x10;
+ i2c_master_send(client, buf, 1);
+ i2c_master_recv(client, buf, 1);
+
+ if (!(buf[0] & 0x20))
+ break;
+ if (time_after(jiffies,timeout)) {
+ status = -ETIMEDOUT;
+ break;
+ }
+
+ // wait a bit
+ msleep(10);
+ }
+
+ // delay a bit to let encoder settle
+ msleep(50);
+
+ // done
+ return status;
+}
+
+
+static int saa6752hs_set_bitrate(struct i2c_client* client,
+ struct v4l2_mpeg_compression* params)
+{
+ u8 buf[3];
+
+ // set the bitrate mode
+ buf[0] = 0x71;
+ buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
+ i2c_master_send(client, buf, 2);
+
+ // set the video bitrate
+ if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
+ // set the target bitrate
+ buf[0] = 0x80;
+ buf[1] = params->vi_bitrate.target >> 8;
+ buf[2] = params->vi_bitrate.target & 0xff;
+ i2c_master_send(client, buf, 3);
+
+ // set the max bitrate
+ buf[0] = 0x81;
+ buf[1] = params->vi_bitrate.max >> 8;
+ buf[2] = params->vi_bitrate.max & 0xff;
+ i2c_master_send(client, buf, 3);
+ } else {
+ // set the target bitrate (no max bitrate for CBR)
+ buf[0] = 0x81;
+ buf[1] = params->vi_bitrate.target >> 8;
+ buf[2] = params->vi_bitrate.target & 0xff;
+ i2c_master_send(client, buf, 3);
+ }
+
+ // set the audio bitrate
+ buf[0] = 0x94;
+ buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
+ i2c_master_send(client, buf, 2);
+
+ // set the total bitrate
+ buf[0] = 0xb1;
+ buf[1] = params->st_bitrate.target >> 8;
+ buf[2] = params->st_bitrate.target & 0xff;
+ i2c_master_send(client, buf, 3);
+
+ // return success
+ return 0;
+}
+
+
+static void saa6752hs_set_params(struct i2c_client* client,
+ struct v4l2_mpeg_compression* params)
+{
+ struct saa6752hs_state *h = i2c_get_clientdata(client);
+
+ /* check PIDs */
+ if (params->ts_pid_pmt <= MPEG_PID_MAX)
+ h->params.ts_pid_pmt = params->ts_pid_pmt;
+ if (params->ts_pid_pcr <= MPEG_PID_MAX)
+ h->params.ts_pid_pcr = params->ts_pid_pcr;
+ if (params->ts_pid_video <= MPEG_PID_MAX)
+ h->params.ts_pid_video = params->ts_pid_video;
+ if (params->ts_pid_audio <= MPEG_PID_MAX)
+ h->params.ts_pid_audio = params->ts_pid_audio;
+
+ /* check bitrate parameters */
+ if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
+ (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
+ h->params.vi_bitrate.mode = params->vi_bitrate.mode;
+ if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
+ h->params.st_bitrate.target = params->st_bitrate.target;
+ if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
+ h->params.vi_bitrate.target = params->vi_bitrate.target;
+ if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
+ h->params.vi_bitrate.max = params->vi_bitrate.max;
+ if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
+ h->params.au_bitrate.target = params->au_bitrate.target;
+
+ /* aspect ratio */
+ if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
+ params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
+ h->params.vi_aspect_ratio = params->vi_aspect_ratio;
+
+ /* range checks */
+ if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
+ h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
+ if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
+ h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
+ if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
+ h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
+ if (h->params.au_bitrate.target <= 256)
+ h->params.au_bitrate.target = 256;
+ else
+ h->params.au_bitrate.target = 384;
+}
+
+static int saa6752hs_init(struct i2c_client* client)
+{
+ unsigned char buf[9], buf2[4];
+ struct saa6752hs_state *h;
+ u32 crc;
+ unsigned char localPAT[256];
+ unsigned char localPMT[256];
+
+ h = i2c_get_clientdata(client);
+
+ // Set video format - must be done first as it resets other settings
+ buf[0] = 0x41;
+ buf[1] = 0 /* MPEG_VIDEO_FORMAT_D1 */;
+ i2c_master_send(client, buf, 2);
+
+ // set bitrate
+ saa6752hs_set_bitrate(client, &h->params);
+
+ // Set GOP structure {3, 13}
+ buf[0] = 0x72;
+ buf[1] = 0x03;
+ buf[2] = 0x0D;
+ i2c_master_send(client,buf,3);
+
+ // Set minimum Q-scale {4}
+ buf[0] = 0x82;
+ buf[1] = 0x04;
+ i2c_master_send(client,buf,2);
+
+ // Set maximum Q-scale {12}
+ buf[0] = 0x83;
+ buf[1] = 0x0C;
+ i2c_master_send(client,buf,2);
+
+ // Set Output Protocol
+ buf[0] = 0xD0;
+ buf[1] = 0x81;
+ i2c_master_send(client,buf,2);
+
+ // Set video output stream format {TS}
+ buf[0] = 0xB0;
+ buf[1] = 0x05;
+ i2c_master_send(client,buf,2);
+
+ /* compute PAT */
+ memcpy(localPAT, PAT, sizeof(PAT));
+ localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
+ localPAT[18] = h->params.ts_pid_pmt & 0xff;
+ crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
+ localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
+ localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
+ localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
+ localPAT[sizeof(PAT) - 1] = crc & 0xFF;
+
+ /* compute PMT */
+ memcpy(localPMT, PMT, sizeof(PMT));
+ localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
+ localPMT[4] = h->params.ts_pid_pmt & 0xff;
+ localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
+ localPMT[16] = h->params.ts_pid_pcr & 0xFF;
+ localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
+ localPMT[21] = h->params.ts_pid_video & 0xFF;
+ localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
+ localPMT[26] = h->params.ts_pid_audio & 0xFF;
+ crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
+ localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
+ localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
+ localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
+ localPMT[sizeof(PMT) - 1] = crc & 0xFF;
+
+ // Set Audio PID
+ buf[0] = 0xC1;
+ buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
+ buf[2] = h->params.ts_pid_audio & 0xFF;
+ i2c_master_send(client,buf,3);
+
+ // Set Video PID
+ buf[0] = 0xC0;
+ buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
+ buf[2] = h->params.ts_pid_video & 0xFF;
+ i2c_master_send(client,buf,3);
+
+ // Set PCR PID
+ buf[0] = 0xC4;
+ 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 success
+ return 0;
+}
+
+static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+ struct saa6752hs_state *h;
+
+ printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
+
+ if (NULL == (h = kmalloc(sizeof(*h), GFP_KERNEL)))
+ return -ENOMEM;
+ memset(h,0,sizeof(*h));
+ h->client = client_template;
+ h->params = param_defaults;
+ h->client.adapter = adap;
+ h->client.addr = addr;
+
+ i2c_set_clientdata(&h->client, h);
+ i2c_attach_client(&h->client);
+ 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;
+ default:
+ /* nothing */
+ break;
+ }
+
+ return err;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct i2c_driver driver = {
+ .owner = THIS_MODULE,
+ .name = "i2c saa6752hs MPEG encoder",
+ .id = I2C_DRIVERID_SAA6752HS,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = saa6752hs_probe,
+ .detach_client = saa6752hs_detach,
+ .command = saa6752hs_command,
+};
+
+static struct i2c_client client_template =
+{
+ I2C_DEVNAME("saa6752hs"),
+ .flags = I2C_CLIENT_ALLOW_USE,
+ .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:
+ */
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-05-29 07:57:50 +0200