diff options
| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-12-06 06:53:05 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-12-11 08:54:17 -0200 |
| commit | 5022ba0da8adf4fa82d1c752364b48342d15b0c4 (patch) | |
| tree | 2bee6867a50e28d23690f1ddaf73cecd9391c4e5 | |
| parent | 38160098c6fe425469ee06765e8fdae53e0399a8 (diff) | |
[media] gspca/sn9c20x: Test if sensor is a OV sensor
Instead of just assuming a ov9650 sensor based on USB ID,
double-check it, by reading the sensor ID.
Acked-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/gspca/sn9c20x.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c index 6b155ae3a746..1e0f219188ac 100644 --- a/drivers/media/video/gspca/sn9c20x.c +++ b/drivers/media/video/gspca/sn9c20x.c @@ -1224,8 +1224,17 @@ static int i2c_r2(struct gspca_dev *gspca_dev, u8 reg, u16 *val) static int ov9650_init_sensor(struct gspca_dev *gspca_dev) { int i; + u16 id; struct sd *sd = (struct sd *) gspca_dev; + if (i2c_r2(gspca_dev, 0x1c, &id) < 0) + return -EINVAL; + + if (id != 0x7fa2) { + err("sensor id for ov9650 doesn't match (0x%04x)", id); + return -ENODEV; + } + for (i = 0; i < ARRAY_SIZE(ov9650_init); i++) { if (i2c_w1(gspca_dev, ov9650_init[i].reg, ov9650_init[i].val) < 0) { |