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authorMauro Carvalho Chehab <mchehab@redhat.com>2010-12-06 09:53:05 (GMT)
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-12-11 10:54:17 (GMT)
commit5022ba0da8adf4fa82d1c752364b48342d15b0c4 (patch)
tree2bee6867a50e28d23690f1ddaf73cecd9391c4e5
parent38160098c6fe425469ee06765e8fdae53e0399a8 (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.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c
index 6b155ae..1e0f219 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) {

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