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authorJean Delvare <khali@linux-fr.org>2008-07-17 20:18:31 +0400
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-07-20 14:28:17 +0400
commit5daed07401ed27bb2684e803f3f01e3a424ea282 (patch)
tree662980d51a0866a6d5640e7106427376e8466f66 /drivers
parent03b52c36a38eb72548b9408c497ffabd1519eabe (diff)
downloadlinux-5daed07401ed27bb2684e803f3f01e3a424ea282.tar.xz
V4L/DVB (8379): saa7127: Make device detection optional
The saa7127 driver supports all of SAA7126, SAA7127, SAA7128 and SAA1729 devices. Declare all these devices, so that board drivers can tell which device is present, instead of always relying on auto-detection (which needs to write to the chip, eek!). We still need the detection for ivtv, so a special device name "saa7127_auto" can be used when the caller doesn't know exactly which device is present. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/ivtv/ivtv-i2c.c2
-rw-r--r--drivers/media/video/saa7127.c42
2 files changed, 28 insertions, 16 deletions
diff --git a/drivers/media/video/ivtv/ivtv-i2c.c b/drivers/media/video/ivtv/ivtv-i2c.c
index a1b37ff8669c..af154238fb9a 100644
--- a/drivers/media/video/ivtv/ivtv-i2c.c
+++ b/drivers/media/video/ivtv/ivtv-i2c.c
@@ -135,7 +135,7 @@ static const u8 hw_addrs[] = {
static const char * const hw_devicenames[] = {
"cx25840",
"saa7115",
- "saa7127",
+ "saa7127_auto", /* saa7127 or saa7129 */
"msp3400",
"tuner",
"wm8775",
diff --git a/drivers/media/video/saa7127.c b/drivers/media/video/saa7127.c
index 7ba10e56c609..d0e83fe0ff51 100644
--- a/drivers/media/video/saa7127.c
+++ b/drivers/media/video/saa7127.c
@@ -666,7 +666,6 @@ static int saa7127_probe(struct i2c_client *client,
{
struct saa7127_state *state;
struct v4l2_sliced_vbi_data vbi = { 0, 0, 0, 0 }; /* set to disabled */
- int read_result = 0;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
@@ -710,20 +709,29 @@ static int saa7127_probe(struct i2c_client *client,
saa7127_set_input_type(client, SAA7127_INPUT_TYPE_NORMAL);
saa7127_set_video_enable(client, 1);
- /* Detect if it's an saa7129 */
- read_result = saa7127_read(client, SAA7129_REG_FADE_KEY_COL2);
- saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, 0xaa);
- if (saa7127_read(client, SAA7129_REG_FADE_KEY_COL2) == 0xaa) {
- v4l_info(client, "saa7129 found @ 0x%x (%s)\n",
- client->addr << 1, client->adapter->name);
- saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, read_result);
- saa7127_write_inittab(client, saa7129_init_config_extra);
- state->ident = V4L2_IDENT_SAA7129;
- } else {
- v4l_info(client, "saa7127 found @ 0x%x (%s)\n",
- client->addr << 1, client->adapter->name);
- state->ident = V4L2_IDENT_SAA7127;
+ if (id->driver_data) { /* Chip type is already known */
+ state->ident = id->driver_data;
+ } else { /* Needs detection */
+ int read_result;
+
+ /* Detect if it's an saa7129 */
+ read_result = saa7127_read(client, SAA7129_REG_FADE_KEY_COL2);
+ saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, 0xaa);
+ if (saa7127_read(client, SAA7129_REG_FADE_KEY_COL2) == 0xaa) {
+ saa7127_write(client, SAA7129_REG_FADE_KEY_COL2,
+ read_result);
+ state->ident = V4L2_IDENT_SAA7129;
+ strlcpy(client->name, "saa7129", I2C_NAME_SIZE);
+ } else {
+ state->ident = V4L2_IDENT_SAA7127;
+ strlcpy(client->name, "saa7127", I2C_NAME_SIZE);
+ }
}
+
+ v4l_info(client, "%s found @ 0x%x (%s)\n", client->name,
+ client->addr << 1, client->adapter->name);
+ if (state->ident == V4L2_IDENT_SAA7129)
+ saa7127_write_inittab(client, saa7129_init_config_extra);
return 0;
}
@@ -740,7 +748,11 @@ static int saa7127_remove(struct i2c_client *client)
/* ----------------------------------------------------------------------- */
static struct i2c_device_id saa7127_id[] = {
- { "saa7127", 0 },
+ { "saa7127_auto", 0 }, /* auto-detection */
+ { "saa7126", V4L2_IDENT_SAA7127 },
+ { "saa7127", V4L2_IDENT_SAA7127 },
+ { "saa7128", V4L2_IDENT_SAA7129 },
+ { "saa7129", V4L2_IDENT_SAA7129 },
{ }
};
MODULE_DEVICE_TABLE(i2c, saa7127_id);