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V4L/DVB (8630): First mxb cleanup phase

Browse source 
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2008-07-25 10:31:23 -03:00 committed by Mauro Carvalho Chehab
parent 7d341a6a52
commit a832781cd3
4 changed files with 169 additions and 316 deletions
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13
drivers/media/video/mxb.c
View file

@ -466,15 +466,15 @@ static int mxb_attach(struct saa7146_dev* dev, struct saa7146_pci_extension_data
/* checking for i2c-devices can be omitted here, because we /* checking for i2c-devices can be omitted here, because we
already did this in "mxb_vl42_probe" */ already did this in "mxb_vl42_probe" */
saa7146_vv_init(dev,&vv_data); saa7146_vv_init(dev, &vv_data);
if( 0 != saa7146_register_device(&mxb->video_dev, dev, "mxb", VFL_TYPE_GRABBER)) { if (saa7146_register_device(&mxb->video_dev, dev, "mxb", VFL_TYPE_GRABBER)) {
ERR(("cannot register capture v4l2 device. skipping.\n")); ERR(("cannot register capture v4l2 device. skipping.\n"));
return -1; return -1;
} }
/* initialization stuff (vbi) (only for revision > 0 and for extensions which want it)*/ /* initialization stuff (vbi) (only for revision > 0 and for extensions which want it)*/
if( 0 != MXB_BOARD_CAN_DO_VBI(dev)) { if (MXB_BOARD_CAN_DO_VBI(dev)) {
if( 0 != saa7146_register_device(&mxb->vbi_dev, dev, "mxb", VFL_TYPE_VBI)) { if (saa7146_register_device(&mxb->vbi_dev, dev, "mxb", VFL_TYPE_VBI)) {
ERR(("cannot register vbi v4l2 device. skipping.\n")); ERR(("cannot register vbi v4l2 device. skipping.\n"));
} }
} }
@ -486,7 +486,7 @@ static int mxb_attach(struct saa7146_dev* dev, struct saa7146_pci_extension_data
i2c_use_client(mxb->saa7111a); i2c_use_client(mxb->saa7111a);
i2c_use_client(mxb->tuner); i2c_use_client(mxb->tuner);
printk("mxb: found 'Multimedia eXtension Board'-%d.\n",mxb_num); printk("mxb: found Multimedia eXtension Board #%d.\n", mxb_num);
mxb_num++; mxb_num++;
mxb_init_done(dev); mxb_init_done(dev);
@ -737,8 +737,8 @@ static int mxb_ioctl(struct saa7146_fh *fh, unsigned int cmd, void *arg)
DEB_EE(("VIDIOC_G_TUNER: %d\n", t->index)); DEB_EE(("VIDIOC_G_TUNER: %d\n", t->index));
memset(t,0,sizeof(*t)); memset(t,0,sizeof(*t));
strcpy(t->name, "Television");
strlcpy(t->name, "Television", sizeof(t->name));
t->type = V4L2_TUNER_ANALOG_TV; t->type = V4L2_TUNER_ANALOG_TV;
t->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2 | V4L2_TUNER_CAP_SAP; t->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2 | V4L2_TUNER_CAP_SAP;
t->rangelow = 772; /* 48.25 MHZ / 62.5 kHz = 772, see fi1216mk2-specs, page 2 */ t->rangelow = 772; /* 48.25 MHZ / 62.5 kHz = 772, see fi1216mk2-specs, page 2 */
@ -746,7 +746,6 @@ static int mxb_ioctl(struct saa7146_fh *fh, unsigned int cmd, void *arg)
/* FIXME: add the real signal strength here */ /* FIXME: add the real signal strength here */
t->signal = 0xffff; t->signal = 0xffff;
t->afc = 0; t->afc = 0;
mxb->tda9840->driver->command(mxb->tda9840,TDA9840_DETECT, &byte); mxb->tda9840->driver->command(mxb->tda9840,TDA9840_DETECT, &byte);
t->audmode = mxb->cur_mode; t->audmode = mxb->cur_mode;

168
drivers/media/video/tda9840.c
View file

@ -2,6 +2,7 @@
tda9840 - i2c-driver for the tda9840 by SGS Thomson tda9840 - i2c-driver for the tda9840 by SGS Thomson
Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
The tda9840 is a stereo/dual sound processor with digital The tda9840 is a stereo/dual sound processor with digital
identification. It can be found at address 0x84 on the i2c-bus. identification. It can be found at address 0x84 on the i2c-bus.
@ -28,15 +29,18 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <media/v4l2-common.h>
#include <media/v4l2-i2c-drv-legacy.h>
#include "tda9840.h" #include "tda9840.h"
static int debug; /* insmod parameter */ MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
module_param(debug, int, 0644); MODULE_DESCRIPTION("tda9840 driver");
MODULE_PARM_DESC(debug, "Turn on/off device debugging (default:off)."); MODULE_LICENSE("GPL");
#define dprintk(args...) \ static int debug;
do { if (debug) { printk("%s: %s()[%d]: ", KBUILD_MODNAME, __func__, __LINE__); printk(args); } } while (0) module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define SWITCH 0x00 #define SWITCH 0x00
#define LEVEL_ADJUST 0x02 #define LEVEL_ADJUST 0x02
@ -49,18 +53,21 @@ static unsigned short normal_i2c[] = { I2C_ADDR_TDA9840, I2C_CLIENT_END };
/* magic definition of all other variables and things */ /* magic definition of all other variables and things */
I2C_CLIENT_INSMOD; I2C_CLIENT_INSMOD;
static struct i2c_driver driver; static void tda9840_write(struct i2c_client *client, u8 reg, u8 val)
static struct i2c_client client_template; {
if (i2c_smbus_write_byte_data(client, reg, val))
v4l_dbg(1, debug, client, "error writing %02x to %02x\n",
val, reg);
}
static int command(struct i2c_client *client, unsigned int cmd, void *arg) static int tda9840_command(struct i2c_client *client, unsigned cmd, void *arg)
{ {
int result; int result;
int byte = *(int *)arg; int byte = *(int *)arg;
switch (cmd) { switch (cmd) {
case TDA9840_SWITCH: case TDA9840_SWITCH:
v4l_dbg(1, debug, client, "TDA9840_SWITCH: 0x%02x\n", byte);
dprintk("TDA9840_SWITCH: 0x%02x\n", byte);
if (byte != TDA9840_SET_MONO if (byte != TDA9840_SET_MONO
&& byte != TDA9840_SET_MUTE && byte != TDA9840_SET_MUTE
@ -73,14 +80,11 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
return -EINVAL; return -EINVAL;
} }
result = i2c_smbus_write_byte_data(client, SWITCH, byte); tda9840_write(client, SWITCH, byte);
if (result)
dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
break; break;
case TDA9840_LEVEL_ADJUST: case TDA9840_LEVEL_ADJUST:
v4l_dbg(1, debug, client, "TDA9840_LEVEL_ADJUST: %d\n", byte);
dprintk("TDA9840_LEVEL_ADJUST: %d\n", byte);
/* check for correct range */ /* check for correct range */
if (byte > 25 || byte < -20) if (byte > 25 || byte < -20)
@ -92,15 +96,11 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
byte += 0x8; byte += 0x8;
else else
byte = -byte; byte = -byte;
tda9840_write(client, LEVEL_ADJUST, byte);
result = i2c_smbus_write_byte_data(client, LEVEL_ADJUST, byte);
if (result)
dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
break; break;
case TDA9840_STEREO_ADJUST: case TDA9840_STEREO_ADJUST:
v4l_dbg(1, debug, client, "TDA9840_STEREO_ADJUST: %d\n", byte);
dprintk("TDA9840_STEREO_ADJUST: %d\n", byte);
/* check for correct range */ /* check for correct range */
if (byte > 25 || byte < -24) if (byte > 25 || byte < -24)
@ -113,9 +113,7 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
else else
byte = -byte; byte = -byte;
result = i2c_smbus_write_byte_data(client, STEREO_ADJUST, byte); tda9840_write(client, STEREO_ADJUST, byte);
if (result)
dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
break; break;
case TDA9840_DETECT: { case TDA9840_DETECT: {
@ -123,29 +121,29 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
byte = i2c_smbus_read_byte_data(client, STEREO_ADJUST); byte = i2c_smbus_read_byte_data(client, STEREO_ADJUST);
if (byte == -1) { if (byte == -1) {
dprintk("i2c_smbus_read_byte_data() failed\n"); v4l_dbg(1, debug, client,
"i2c_smbus_read_byte_data() failed\n");
return -EIO; return -EIO;
} }
if (0 != (byte & 0x80)) { if (byte & 0x80) {
dprintk("TDA9840_DETECT: register contents invalid\n"); v4l_dbg(1, debug, client,
"TDA9840_DETECT: register contents invalid\n");
return -EINVAL; return -EINVAL;
} }
dprintk("TDA9840_DETECT: byte: 0x%02x\n", byte); v4l_dbg(1, debug, client, "TDA9840_DETECT: byte: 0x%02x\n", byte);
*ret = ((byte & 0x60) >> 5); *ret = (byte & 0x60) >> 5;
result = 0; result = 0;
break; break;
} }
case TDA9840_TEST: case TDA9840_TEST:
dprintk("TDA9840_TEST: 0x%02x\n", byte); v4l_dbg(1, debug, client, "TDA9840_TEST: 0x%02x\n", byte);
/* mask out irrelevant bits */ /* mask out irrelevant bits */
byte &= 0x3; byte &= 0x3;
result = i2c_smbus_write_byte_data(client, TEST, byte); tda9840_write(client, TEST, byte);
if (result)
dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
break; break;
default: default:
return -ENOIOCTLCMD; return -ENOIOCTLCMD;
@ -157,99 +155,51 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
return 0; return 0;
} }
static int detect(struct i2c_adapter *adapter, int address, int kind) static int tda9840_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{ {
struct i2c_client *client; int result;
int result = 0; int byte;
int byte = 0x0;
/* let's see whether this adapter can support what we need */ /* let's see whether this adapter can support what we need */
if (0 == i2c_check_functionality(adapter, if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA | I2C_FUNC_SMBUS_READ_BYTE_DATA |
I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) { I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
return 0; return 0;
}
/* allocate memory for client structure */ v4l_info(client, "chip found @ 0x%x (%s)\n",
client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL); client->addr << 1, client->adapter->name);
if (!client) {
printk("not enough kernel memory\n");
return -ENOMEM;
}
/* fill client structure */
memcpy(client, &client_template, sizeof(struct i2c_client));
client->addr = address;
client->adapter = adapter;
/* tell the i2c layer a new client has arrived */
if (0 != (result = i2c_attach_client(client))) {
kfree(client);
return result;
}
/* set initial values for level & stereo - adjustment, mode */ /* set initial values for level & stereo - adjustment, mode */
byte = 0; byte = 0;
result = command(client, TDA9840_LEVEL_ADJUST, &byte); result = tda9840_command(client, TDA9840_LEVEL_ADJUST, &byte);
result += command(client, TDA9840_STEREO_ADJUST, &byte); result += tda9840_command(client, TDA9840_STEREO_ADJUST, &byte);
byte = TDA9840_SET_MONO; byte = TDA9840_SET_MONO;
result = command(client, TDA9840_SWITCH, &byte); result = tda9840_command(client, TDA9840_SWITCH, &byte);
if (result) { if (result) {
dprintk("could not initialize tda9840\n"); v4l_dbg(1, debug, client, "could not initialize tda9840\n");
return -ENODEV; return -ENODEV;
} }
printk("tda9840: detected @ 0x%02x on adapter %s\n", address, &client->adapter->name[0]);
return 0; return 0;
} }
static int attach(struct i2c_adapter *adapter) static int tda9840_legacy_probe(struct i2c_adapter *adapter)
{ {
/* let's see whether this is a know adapter we can attach to */ /* Let's see whether this is a known adapter we can attach to.
if (adapter->id != I2C_HW_SAA7146) { Prevents conflicts with tvaudio.c. */
dprintk("refusing to probe on unknown adapter [name='%s',id=0x%x]\n", adapter->name, adapter->id); return adapter->id == I2C_HW_SAA7146;
return -ENODEV;
}
return i2c_probe(adapter, &addr_data, &detect);
} }
static const struct i2c_device_id tda9840_id[] = {
static int detach(struct i2c_client *client) { "tda9840", 0 },
{ { }
int ret = i2c_detach_client(client);
kfree(client);
return ret;
}
static struct i2c_driver driver = {
.driver = {
.name = "tda9840",
},
.id = I2C_DRIVERID_TDA9840,
.attach_adapter = attach,
.detach_client = detach,
.command = command,
}; };
MODULE_DEVICE_TABLE(i2c, tda9840_id);
static struct i2c_client client_template = { static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = "tda9840", .name = "tda9840",
.driver = &driver, .driverid = I2C_DRIVERID_TDA9840,
.command = tda9840_command,
.probe = tda9840_probe,
.legacy_probe = tda9840_legacy_probe,
.id_table = tda9840_id,
}; };
static int __init this_module_init(void)
{
return i2c_add_driver(&driver);
}
static void __exit this_module_exit(void)
{
i2c_del_driver(&driver);
}
module_init(this_module_init);
module_exit(this_module_exit);
MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
MODULE_DESCRIPTION("tda9840 driver");
MODULE_LICENSE("GPL");

139
drivers/media/video/tea6415c.c
View file

@ -2,6 +2,7 @@
tea6415c - i2c-driver for the tea6415c by SGS Thomson tea6415c - i2c-driver for the tea6415c by SGS Thomson
Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
The tea6415c is a bus controlled video-matrix-switch The tea6415c is a bus controlled video-matrix-switch
with 8 inputs and 6 outputs. with 8 inputs and 6 outputs.
@ -30,18 +31,18 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <media/v4l2-common.h>
#include <media/v4l2-i2c-drv-legacy.h>
#include "tea6415c.h" #include "tea6415c.h"
static int debug; /* insmod parameter */ MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
MODULE_DESCRIPTION("tea6415c driver");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, int, 0644); module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off device debugging (default:off).");
#define dprintk(args...) \ MODULE_PARM_DESC(debug, "Debug level (0-1)");
do { if (debug) { printk("%s: %s()[%d]: ", KBUILD_MODNAME, __func__, __LINE__); printk(args); } } while (0)
#define TEA6415C_NUM_INPUTS 8
#define TEA6415C_NUM_OUTPUTS 6
/* addresses to scan, found only at 0x03 and/or 0x43 (7-bit) */ /* addresses to scan, found only at 0x03 and/or 0x43 (7-bit) */
static unsigned short normal_i2c[] = { I2C_TEA6415C_1, I2C_TEA6415C_2, I2C_CLIENT_END }; static unsigned short normal_i2c[] = { I2C_TEA6415C_1, I2C_TEA6415C_2, I2C_CLIENT_END };
@ -49,60 +50,6 @@ static unsigned short normal_i2c[] = { I2C_TEA6415C_1, I2C_TEA6415C_2, I2C_CLIEN
/* magic definition of all other variables and things */ /* magic definition of all other variables and things */
I2C_CLIENT_INSMOD; I2C_CLIENT_INSMOD;
static struct i2c_driver driver;
static struct i2c_client client_template;
/* this function is called by i2c_probe */
static int detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *client = NULL;
int err = 0;
/* let's see whether this adapter can support what we need */
if (0 == i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE)) {
return 0;
}
/* allocate memory for client structure */
client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (!client) {
return -ENOMEM;
}
/* fill client structure */
memcpy(client, &client_template, sizeof(struct i2c_client));
client->addr = address;
client->adapter = adapter;
/* tell the i2c layer a new client has arrived */
if (0 != (err = i2c_attach_client(client))) {
kfree(client);
return err;
}
printk("tea6415c: detected @ 0x%02x on adapter %s\n", address, &client->adapter->name[0]);
return 0;
}
static int attach(struct i2c_adapter *adapter)
{
/* let's see whether this is a know adapter we can attach to */
if (adapter->id != I2C_HW_SAA7146) {
dprintk("refusing to probe on unknown adapter [name='%s',id=0x%x]\n", adapter->name, adapter->id);
return -ENODEV;
}
return i2c_probe(adapter, &addr_data, &detect);
}
static int detach(struct i2c_client *client)
{
int ret = i2c_detach_client(client);
kfree(client);
return ret;
}
/* makes a connection between the input-pin 'i' and the output-pin 'o' /* makes a connection between the input-pin 'i' and the output-pin 'o'
for the tea6415c-client 'client' */ for the tea6415c-client 'client' */
static int switch_matrix(struct i2c_client *client, int i, int o) static int switch_matrix(struct i2c_client *client, int i, int o)
@ -110,7 +57,7 @@ static int switch_matrix(struct i2c_client *client, int i, int o)
u8 byte = 0; u8 byte = 0;
int ret; int ret;
dprintk("adr:0x%02x, i:%d, o:%d\n", client->addr, i, o); v4l_dbg(1, debug, client, "i=%d, o=%d\n", i, o);
/* check if the pins are valid */ /* check if the pins are valid */
if (0 == ((1 == i || 3 == i || 5 == i || 6 == i || 8 == i || 10 == i || 20 == i || 11 == i) if (0 == ((1 == i || 3 == i || 5 == i || 6 == i || 8 == i || 10 == i || 20 == i || 11 == i)
@ -168,14 +115,14 @@ static int switch_matrix(struct i2c_client *client, int i, int o)
ret = i2c_smbus_write_byte(client, byte); ret = i2c_smbus_write_byte(client, byte);
if (ret) { if (ret) {
dprintk("i2c_smbus_write_byte() failed, ret:%d\n", ret); v4l_dbg(1, debug, client,
"i2c_smbus_write_byte() failed, ret:%d\n", ret);
return -EIO; return -EIO;
} }
return ret; return ret;
} }
static int command(struct i2c_client *client, unsigned int cmd, void *arg) static int tea6415c_command(struct i2c_client *client, unsigned cmd, void *arg)
{ {
struct tea6415c_multiplex *v = (struct tea6415c_multiplex *)arg; struct tea6415c_multiplex *v = (struct tea6415c_multiplex *)arg;
int result = 0; int result = 0;
@ -187,38 +134,40 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
default: default:
return -ENOIOCTLCMD; return -ENOIOCTLCMD;
} }
return result; return result;
} }
static struct i2c_driver driver = { /* this function is called by i2c_probe */
.driver = { static int tea6415c_probe(struct i2c_client *client,
.name = "tea6415c", const struct i2c_device_id *id)
}, {
.id = I2C_DRIVERID_TEA6415C, /* let's see whether this adapter can support what we need */
.attach_adapter = attach, if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE))
.detach_client = detach, return 0;
.command = command,
};
static struct i2c_client client_template = { v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
return 0;
}
static int tea6415c_legacy_probe(struct i2c_adapter *adapter)
{
/* Let's see whether this is a known adapter we can attach to.
Prevents conflicts with tvaudio.c. */
return adapter->id == I2C_HW_SAA7146;
}
static const struct i2c_device_id tea6415c_id[] = {
{ "tea6415c", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tea6415c_id);
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = "tea6415c", .name = "tea6415c",
.driver = &driver, .driverid = I2C_DRIVERID_TEA6415C,
.command = tea6415c_command,
.probe = tea6415c_probe,
.legacy_probe = tea6415c_legacy_probe,
.id_table = tea6415c_id,
}; };
static int __init this_module_init(void)
{
return i2c_add_driver(&driver);
}
static void __exit this_module_exit(void)
{
i2c_del_driver(&driver);
}
module_init(this_module_init);
module_exit(this_module_exit);
MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
MODULE_DESCRIPTION("tea6415c driver");
MODULE_LICENSE("GPL");

165
drivers/media/video/tea6420.c
View file

@ -2,6 +2,7 @@
tea6420 - i2c-driver for the tea6420 by SGS Thomson tea6420 - i2c-driver for the tea6420 by SGS Thomson
Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
The tea6420 is a bus controlled audio-matrix with 5 stereo inputs, The tea6420 is a bus controlled audio-matrix with 5 stereo inputs,
4 stereo outputs and gain control for each output. 4 stereo outputs and gain control for each output.
@ -30,15 +31,18 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <media/v4l2-common.h>
#include <media/v4l2-i2c-drv-legacy.h>
#include "tea6420.h" #include "tea6420.h"
static int debug; /* insmod parameter */ MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
module_param(debug, int, 0644); MODULE_DESCRIPTION("tea6420 driver");
MODULE_PARM_DESC(debug, "Turn on/off device debugging (default:off)."); MODULE_LICENSE("GPL");
#define dprintk(args...) \ static int debug;
do { if (debug) { printk("%s: %s()[%d]: ", KBUILD_MODNAME, __func__, __LINE__); printk(args); } } while (0) module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
/* addresses to scan, found only at 0x4c and/or 0x4d (7-Bit) */ /* addresses to scan, found only at 0x4c and/or 0x4d (7-Bit) */
static unsigned short normal_i2c[] = { I2C_ADDR_TEA6420_1, I2C_ADDR_TEA6420_2, I2C_CLIENT_END }; static unsigned short normal_i2c[] = { I2C_ADDR_TEA6420_1, I2C_ADDR_TEA6420_2, I2C_CLIENT_END };
@ -46,23 +50,20 @@ static unsigned short normal_i2c[] = { I2C_ADDR_TEA6420_1, I2C_ADDR_TEA6420_2, I
/* magic definition of all other variables and things */ /* magic definition of all other variables and things */
I2C_CLIENT_INSMOD; I2C_CLIENT_INSMOD;
static struct i2c_driver driver;
static struct i2c_client client_template;
/* make a connection between the input 'i' and the output 'o' /* make a connection between the input 'i' and the output 'o'
with gain 'g' for the tea6420-client 'client' (note: i = 6 means 'mute') */ with gain 'g' for the tea6420-client 'client' (note: i = 6 means 'mute') */
static int tea6420_switch(struct i2c_client *client, int i, int o, int g) static int tea6420_switch(struct i2c_client *client, int i, int o, int g)
{ {
u8 byte = 0; u8 byte;
int ret; int ret;
dprintk("adr:0x%02x, i:%d, o:%d, g:%d\n", client->addr, i, o, g); v4l_dbg(1, debug, client, "i=%d, o=%d, g=%d\n", i, o, g);
/* check if the parameters are valid */ /* check if the parameters are valid */
if (i < 1 || i > 6 || o < 1 || o > 4 || g < 0 || g > 6 || g % 2 != 0) if (i < 1 || i > 6 || o < 1 || o > 4 || g < 0 || g > 6 || g % 2 != 0)
return -1; return -1;
byte = ((o - 1) << 5); byte = ((o - 1) << 5);
byte |= (i - 1); byte |= (i - 1);
/* to understand this, have a look at the tea6420-specs (p.5) */ /* to understand this, have a look at the tea6420-specs (p.5) */
@ -82,76 +83,14 @@ static int tea6420_switch(struct i2c_client *client, int i, int o, int g)
ret = i2c_smbus_write_byte(client, byte); ret = i2c_smbus_write_byte(client, byte);
if (ret) { if (ret) {
dprintk("i2c_smbus_write_byte() failed, ret:%d\n", ret); v4l_dbg(1, debug, client,
"i2c_smbus_write_byte() failed, ret:%d\n", ret);
return -EIO; return -EIO;
} }
return 0; return 0;
} }
/* this function is called by i2c_probe */ static int tea6420_command(struct i2c_client *client, unsigned cmd, void *arg)
static int tea6420_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *client;
int err = 0, i = 0;
/* let's see whether this adapter can support what we need */
if (0 == i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE)) {
return 0;
}
/* allocate memory for client structure */
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (!client) {
return -ENOMEM;
}
/* fill client structure */
memcpy(client, &client_template, sizeof(struct i2c_client));
client->addr = address;
client->adapter = adapter;
/* tell the i2c layer a new client has arrived */
if (0 != (err = i2c_attach_client(client))) {
kfree(client);
return err;
}
/* set initial values: set "mute"-input to all outputs at gain 0 */
err = 0;
for (i = 1; i < 5; i++) {
err += tea6420_switch(client, 6, i, 0);
}
if (err) {
dprintk("could not initialize tea6420\n");
kfree(client);
return -ENODEV;
}
printk("tea6420: detected @ 0x%02x on adapter %s\n", address, &client->adapter->name[0]);
return 0;
}
static int attach(struct i2c_adapter *adapter)
{
/* let's see whether this is a know adapter we can attach to */
if (adapter->id != I2C_HW_SAA7146) {
dprintk("refusing to probe on unknown adapter [name='%s',id=0x%x]\n", adapter->name, adapter->id);
return -ENODEV;
}
return i2c_probe(adapter, &addr_data, &tea6420_detect);
}
static int detach(struct i2c_client *client)
{
int ret = i2c_detach_client(client);
kfree(client);
return ret;
}
static int command(struct i2c_client *client, unsigned int cmd, void *arg)
{ {
struct tea6420_multiplex *a = (struct tea6420_multiplex *)arg; struct tea6420_multiplex *a = (struct tea6420_multiplex *)arg;
int result = 0; int result = 0;
@ -167,34 +106,50 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg)
return result; return result;
} }
static struct i2c_driver driver = { /* this function is called by i2c_probe */
.driver = { static int tea6420_probe(struct i2c_client *client,
.name = "tea6420", const struct i2c_device_id *id)
}, {
.id = I2C_DRIVERID_TEA6420, int err, i;
.attach_adapter = attach,
.detach_client = detach,
.command = command,
};
static struct i2c_client client_template = { /* let's see whether this adapter can support what we need */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE))
return -EIO;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
/* set initial values: set "mute"-input to all outputs at gain 0 */
err = 0;
for (i = 1; i < 5; i++) {
err += tea6420_switch(client, 6, i, 0);
}
if (err) {
v4l_dbg(1, debug, client, "could not initialize tea6420\n");
kfree(client);
return -ENODEV;
}
return 0;
}
static int tea6420_legacy_probe(struct i2c_adapter *adapter)
{
/* Let's see whether this is a known adapter we can attach to.
Prevents conflicts with tvaudio.c. */
return adapter->id == I2C_HW_SAA7146;
}
static const struct i2c_device_id tea6420_id[] = {
{ "tea6420", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tea6420_id);
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
.name = "tea6420", .name = "tea6420",
.driver = &driver, .driverid = I2C_DRIVERID_TEA6420,
.command = tea6420_command,
.probe = tea6420_probe,
.legacy_probe = tea6420_legacy_probe,
.id_table = tea6420_id,
}; };
static int __init this_module_init(void)
{
return i2c_add_driver(&driver);
}
static void __exit this_module_exit(void)
{
i2c_del_driver(&driver);
}
module_init(this_module_init);
module_exit(this_module_exit);
MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
MODULE_DESCRIPTION("tea6420 driver");
MODULE_LICENSE("GPL");