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kernel-ark/drivers/media/video/saa7134/saa6752hs.c
Jean Delvare b3d5496ea5 [PATCH] I2C: Kill address ranges in non-sensors i2c chip drivers 
Some months ago, you killed the address ranges mechanism from all
sensors i2c chip drivers (both the module parameters and the in-code
address lists). I think it was a very good move, as the ranges can
easily be replaced by individual addresses, and this allowed for
significant cleanups in the i2c core (let alone the impressive size
shrink for all these drivers).

Unfortunately you did not do the same for non-sensors i2c chip drivers.
These need the address ranges even less, so we could get rid of the
ranges here as well for another significant i2c core cleanup. Here comes
a patch which does just that. Since the process is exactly the same as
what you did for the other drivers set already, I did not split this one
in parts.

A documentation update is included.

The change saves 308 bytes in the i2c core, and an average 1382 bytes
for chip drivers which use I2C_CLIENT_INSMOD, 126 bytes for those which
do not.

This change is required if we want to merge the sensors and non-sensors
i2c code (and we want to do this).

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/Documentation/i2c/writing-clients
===================================================================
2005-06-21 21:51:48 -07:00

630 lines
16 KiB
C
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#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};
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_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,
};
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 i2c_client client;
struct v4l2_mpeg_compression params;
enum saa6752hs_videoformat video_format;
};
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_subsampling(struct i2c_client* client,
struct v4l2_format* f)
{
struct saa6752hs_state *h = i2c_get_clientdata(client);
int dist_352, dist_480, dist_720;
/*
FIXME: translate and round width/height into EMPRESS
subsample type:
type | PAL | NTSC
---------------------------
SIF | 352x288 | 352x240
1/2 D1 | 352x576 | 352x480
2/3 D1 | 480x576 | 480x480
D1 | 720x576 | 720x480
*/
dist_352 = abs(f->fmt.pix.width - 352);
dist_480 = abs(f->fmt.pix.width - 480);
dist_720 = abs(f->fmt.pix.width - 720);
if (dist_720 < dist_480) {
f->fmt.pix.width = 720;
f->fmt.pix.height = 576;
h->video_format = SAA6752HS_VF_D1;
}
else if (dist_480 < dist_352) {
f->fmt.pix.width = 480;
f->fmt.pix.height = 576;
h->video_format = SAA6752HS_VF_2_3_D1;
}
else {
f->fmt.pix.width = 352;
if (abs(f->fmt.pix.height - 576) <
abs(f->fmt.pix.height - 288)) {
f->fmt.pix.height = 576;
h->video_format = SAA6752HS_VF_1_2_D1;
}
else {
f->fmt.pix.height = 288;
h->video_format = SAA6752HS_VF_SIF;
}
}
}
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] = h->video_format;
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;
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;
}
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:
*/
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