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Diffstat (limited to 'linux/drivers/media/video/saa7134/saa6752hs.c')
-rw-r--r--linux/drivers/media/video/saa7134/saa6752hs.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/linux/drivers/media/video/saa7134/saa6752hs.c b/linux/drivers/media/video/saa7134/saa6752hs.c
new file mode 100644
index 000000000..78273dbc3
--- /dev/null
+++ b/linux/drivers/media/video/saa7134/saa6752hs.c
@@ -0,0 +1,441 @@
+#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>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+#include "i2c-compat.h"
+#include "id.h"
+#include "saa6752hs.h"
+#else
+#include <media/id.h>
+#include <media/saa6752hs.h>
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,71)
+# define strlcpy(dest,src,len) strncpy(dest,src,(len)-1)
+#endif
+
+/* 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;
+
+
+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, 0x10, // PMT PID(0x10)
+
+ 0x76, 0xf1, 0x44, 0xd1 // CRC32
+};
+
+static u8 PMT[] = {
+ 0xc2, // i2c register
+ 0x01, // table number for encoder
+
+ 0x47, // sync
+ 0x40, 0x10, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0x10)
+ 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)
+
+ 0xe1, 0x04, // PCR_PID (0x104)
+
+ 0xf0, 0x00, // program_info_length(0)
+
+ 0x02, 0xe1, 0x00, 0xf0, 0x00, // video stream type(2), pid(0x100)
+ 0x04, 0xe1, 0x03, 0xf0, 0x00, // audio stream type(4), pid(0x103)
+
+ 0xa1, 0xca, 0x0f, 0x82 // CRC32
+};
+
+static struct mpeg_params mpeg_params_template =
+{
+ .bitrate_mode = MPEG_BITRATE_MODE_CBR,
+ .video_target_bitrate = 5000,
+ .audio_bitrate = MPEG_AUDIO_BITRATE_256,
+ .total_bitrate = 6000,
+};
+
+
+/* ---------------------------------------------------------------------- */
+
+
+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
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ/100);
+ }
+
+ // delay a bit to let encoder settle
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ/20);
+
+ // done
+ return status;
+}
+
+
+static int saa6752hs_set_bitrate(struct i2c_client* client,
+ struct mpeg_params* params)
+{
+ u8 buf[3];
+
+ // set the bitrate mode
+ buf[0] = 0x71;
+ buf[1] = params->bitrate_mode;
+ i2c_master_send(client, buf, 2);
+
+ // set the video bitrate
+ if (params->bitrate_mode == MPEG_BITRATE_MODE_VBR) {
+ // set the target bitrate
+ buf[0] = 0x80;
+ buf[1] = params->video_target_bitrate >> 8;
+ buf[2] = params->video_target_bitrate & 0xff;
+ i2c_master_send(client, buf, 3);
+
+ // set the max bitrate
+ buf[0] = 0x81;
+ buf[1] = params->video_max_bitrate >> 8;
+ buf[2] = params->video_max_bitrate & 0xff;
+ i2c_master_send(client, buf, 3);
+ } else {
+ // set the target bitrate (no max bitrate for CBR)
+ buf[0] = 0x81;
+ buf[1] = params->video_target_bitrate >> 8;
+ buf[2] = params->video_target_bitrate & 0xff;
+ i2c_master_send(client, buf, 3);
+ }
+
+ // set the audio bitrate
+ buf[0] = 0x94;
+ buf[1] = params->audio_bitrate;
+ i2c_master_send(client, buf, 2);
+
+ // set the total bitrate
+ buf[0] = 0xb1;
+ buf[1] = params->total_bitrate >> 8;
+ buf[2] = params->total_bitrate & 0xff;
+ i2c_master_send(client, buf, 3);
+
+ return 0;
+}
+
+
+static int saa6752hs_init(struct i2c_client* client, struct mpeg_params* params)
+{
+ unsigned char buf[3];
+ void *data;
+
+ // check the bitrate parameters first
+ if (params != NULL) {
+ if (params->bitrate_mode >= MPEG_BITRATE_MODE_MAX)
+ return -EINVAL;
+ if (params->video_target_bitrate >= MPEG_VIDEO_TARGET_BITRATE_MAX)
+ return -EINVAL;
+ if (params->video_max_bitrate >= MPEG_VIDEO_MAX_BITRATE_MAX)
+ return -EINVAL;
+ if (params->audio_bitrate >= MPEG_AUDIO_BITRATE_MAX)
+ return -EINVAL;
+ if (params->total_bitrate >= MPEG_TOTAL_BITRATE_MAX)
+ return -EINVAL;
+ if (params->bitrate_mode == MPEG_BITRATE_MODE_MAX &&
+ params->video_target_bitrate <= params->video_max_bitrate)
+ return -EINVAL;
+ }
+
+ // 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] = 0x01;
+ i2c_master_send(client,buf,2);
+
+ // Set video output stream format {TS}
+ buf[0] = 0xB0;
+ buf[1] = 0x05;
+ i2c_master_send(client,buf,2);
+
+ // Set Audio PID {0x103}
+ buf[0] = 0xC1;
+ buf[1] = 0x01;
+ buf[2] = 0x03;
+ i2c_master_send(client,buf,3);
+
+ // setup bitrate settings
+ data = i2c_get_clientdata(client);
+ if (params) {
+ saa6752hs_set_bitrate(client, params);
+ memcpy(data, params, sizeof(struct mpeg_params));
+ } else {
+ // parameters were not supplied. use the previous set
+ saa6752hs_set_bitrate(client, (struct mpeg_params*) data);
+ }
+
+ // Send SI tables
+ i2c_master_send(client,PAT,sizeof(PAT));
+ i2c_master_send(client,PMT,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);
+
+ return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
+#else
+static int saa6752hs_attach(struct i2c_adapter *adap, int addr,
+ unsigned short flags, int kind)
+#endif
+{
+ struct i2c_client *client;
+ struct mpeg_params* params;
+
+ client_template.adapter = adap;
+ client_template.addr = addr;
+
+ printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
+
+ if (NULL == (client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL)))
+ return -ENOMEM;
+ memcpy(client,&client_template,sizeof(struct i2c_client));
+ strlcpy(client->name, "saa6752hs", sizeof(client->name));
+
+ if (NULL == (params = kmalloc(sizeof(struct mpeg_params), GFP_KERNEL)))
+ return -ENOMEM;
+ memcpy(params,&mpeg_params_template,sizeof(struct mpeg_params));
+ i2c_set_clientdata(client, params);
+
+ i2c_attach_client(client);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ MOD_INC_USE_COUNT;
+#endif
+ return 0;
+}
+
+static int saa6752hs_probe(struct i2c_adapter *adap)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ if (adap->class & I2C_ADAP_CLASS_TV_ANALOG)
+ return i2c_probe(adap, &addr_data, saa6752hs_attach);
+#else
+ switch (adap->id) {
+ case I2C_ALGO_SAA7134:
+ return i2c_probe(adap, &addr_data, saa6752hs_attach);
+ break;
+ }
+#endif
+
+ return 0;
+}
+
+static int saa6752hs_detach(struct i2c_client *client)
+{
+ void *data;
+
+ data = i2c_get_clientdata(client);
+ i2c_detach_client(client);
+ kfree(data);
+ kfree(client);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ MOD_DEC_USE_COUNT;
+#endif
+ return 0;
+}
+
+static int
+saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+ struct mpeg_params* init_arg = arg;
+
+ switch (cmd) {
+ case MPEG_SETPARAMS:
+ return saa6752hs_init(client, init_arg);
+
+ default:
+ /* nothing */
+ break;
+ }
+
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct i2c_driver driver = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,54)
+ .owner = THIS_MODULE,
+#endif
+ .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 unset)"),
+ .flags = I2C_CLIENT_ALLOW_USE,
+ .driver = &driver,
+};
+
+static int saa6752hs_init_module(void)
+{
+ i2c_add_driver(&driver);
+ return 0;
+}
+
+static void 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 (git 2.25.1) at 2025-01-01 19:21:53 +0000