V4L/DVB (10346): gspca - zc3xx: Fix bad variable type with i2c read.
The returned value of i2c read is a 16 bits word. It was stored in
a 8 bits variable, preventing a sensor to be detected.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/zc3xx.c b/drivers/media/video/gspca/zc3xx.c
index 226aafc..74eabce 100644
--- a/drivers/media/video/gspca/zc3xx.c
+++ b/drivers/media/video/gspca/zc3xx.c
@@ -6237,7 +6237,7 @@
{}
};
-static int reg_r_i(struct gspca_dev *gspca_dev,
+static u8 reg_r_i(struct gspca_dev *gspca_dev,
__u16 index)
{
usb_control_msg(gspca_dev->dev,
@@ -6250,10 +6250,10 @@
return gspca_dev->usb_buf[0];
}
-static int reg_r(struct gspca_dev *gspca_dev,
+static u8 reg_r(struct gspca_dev *gspca_dev,
__u16 index)
{
- int ret;
+ u8 ret;
ret = reg_r_i(gspca_dev, index);
PDEBUG(D_USBI, "reg r [%04x] -> %02x", index, ret);
@@ -6734,26 +6734,25 @@
static int vga_2wr_probe(struct gspca_dev *gspca_dev)
{
struct usb_device *dev = gspca_dev->dev;
- __u8 retbyte;
- __u16 checkword;
+ u16 retword;
start_2wr_probe(dev, 0x00); /* HV7131B */
i2c_write(gspca_dev, 0x01, 0xaa, 0x00);
- retbyte = i2c_read(gspca_dev, 0x01);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x01);
+ if (retword != 0)
return 0x00; /* HV7131B */
start_2wr_probe(dev, 0x04); /* CS2102 */
i2c_write(gspca_dev, 0x01, 0xaa, 0x00);
- retbyte = i2c_read(gspca_dev, 0x01);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x01);
+ if (retword != 0)
return 0x04; /* CS2102 */
start_2wr_probe(dev, 0x06); /* OmniVision */
reg_w(dev, 0x08, 0x008d);
i2c_write(gspca_dev, 0x11, 0xaa, 0x00);
- retbyte = i2c_read(gspca_dev, 0x11);
- if (retbyte != 0) {
+ retword = i2c_read(gspca_dev, 0x11);
+ if (retword != 0) {
/* (should have returned 0xaa) --> Omnivision? */
/* reg_r 0x10 -> 0x06 --> */
goto ov_check;
@@ -6761,40 +6760,40 @@
start_2wr_probe(dev, 0x08); /* HDCS2020 */
i2c_write(gspca_dev, 0x15, 0xaa, 0x00);
- retbyte = i2c_read(gspca_dev, 0x15);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x15);
+ if (retword != 0)
return 0x08; /* HDCS2020 */
start_2wr_probe(dev, 0x0a); /* PB0330 */
i2c_write(gspca_dev, 0x07, 0xaa, 0xaa);
- retbyte = i2c_read(gspca_dev, 0x07);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x07);
+ if (retword != 0)
return 0x0a; /* PB0330 */
- retbyte = i2c_read(gspca_dev, 0x03);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x03);
+ if (retword != 0)
return 0x0a; /* PB0330 ?? */
- retbyte = i2c_read(gspca_dev, 0x04);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x04);
+ if (retword != 0)
return 0x0a; /* PB0330 ?? */
start_2wr_probe(dev, 0x0c); /* ICM105A */
i2c_write(gspca_dev, 0x01, 0x11, 0x00);
- retbyte = i2c_read(gspca_dev, 0x01);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x01);
+ if (retword != 0)
return 0x0c; /* ICM105A */
start_2wr_probe(dev, 0x0e); /* PAS202BCB */
reg_w(dev, 0x08, 0x008d);
i2c_write(gspca_dev, 0x03, 0xaa, 0x00);
msleep(500);
- retbyte = i2c_read(gspca_dev, 0x03);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x03);
+ if (retword != 0)
return 0x0e; /* PAS202BCB */
start_2wr_probe(dev, 0x02); /* ?? */
i2c_write(gspca_dev, 0x01, 0xaa, 0x00);
- retbyte = i2c_read(gspca_dev, 0x01);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x01);
+ if (retword != 0)
return 0x02; /* ?? */
ov_check:
reg_r(gspca_dev, 0x0010); /* ?? */
@@ -6808,12 +6807,10 @@
msleep(500);
reg_w(dev, 0x01, 0x0012);
i2c_write(gspca_dev, 0x12, 0x80, 0x00); /* sensor reset */
- retbyte = i2c_read(gspca_dev, 0x0a);
- checkword = retbyte << 8;
- retbyte = i2c_read(gspca_dev, 0x0b);
- checkword |= retbyte;
- PDEBUG(D_PROBE, "probe 2wr ov vga 0x%04x", checkword);
- switch (checkword) {
+ retword = i2c_read(gspca_dev, 0x0a) << 8;
+ retword |= i2c_read(gspca_dev, 0x0b);
+ PDEBUG(D_PROBE, "probe 2wr ov vga 0x%04x", retword);
+ switch (retword) {
case 0x7631: /* OV7630C */
reg_w(dev, 0x06, 0x0010);
break;
@@ -6823,7 +6820,7 @@
default:
return -1; /* not OmniVision */
}
- return checkword;
+ return retword;
}
struct sensor_by_chipset_revision {
@@ -6844,7 +6841,7 @@
struct usb_device *dev = gspca_dev->dev;
int i;
__u8 retbyte;
- __u16 checkword;
+ u16 retword;
/*fixme: lack of 8b=b3 (11,12)-> 10, 8b=e0 (14,15,16)-> 12 found in gspcav1*/
reg_w(dev, 0x02, 0x0010);
@@ -6856,27 +6853,25 @@
reg_w(dev, 0x03, 0x0012);
reg_w(dev, 0x01, 0x0012);
reg_w(dev, 0x05, 0x0012);
- retbyte = i2c_read(gspca_dev, 0x14);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x14);
+ if (retword != 0)
return 0x11; /* HV7131R */
- retbyte = i2c_read(gspca_dev, 0x15);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x15);
+ if (retword != 0)
return 0x11; /* HV7131R */
- retbyte = i2c_read(gspca_dev, 0x16);
- if (retbyte != 0)
+ retword = i2c_read(gspca_dev, 0x16);
+ if (retword != 0)
return 0x11; /* HV7131R */
reg_w(dev, 0x02, 0x0010);
- retbyte = reg_r(gspca_dev, 0x000b);
- checkword = retbyte << 8;
- retbyte = reg_r(gspca_dev, 0x000a);
- checkword |= retbyte;
- PDEBUG(D_PROBE, "probe 3wr vga 1 0x%04x", checkword);
+ retword = reg_r(gspca_dev, 0x000b) << 8;
+ retword |= reg_r(gspca_dev, 0x000a);
+ PDEBUG(D_PROBE, "probe 3wr vga 1 0x%04x", retword);
reg_r(gspca_dev, 0x0010);
/* this is tested only once anyway */
for (i = 0; i < ARRAY_SIZE(chipset_revision_sensor); i++) {
- if (chipset_revision_sensor[i].revision == checkword) {
- sd->chip_revision = checkword;
+ if (chipset_revision_sensor[i].revision == retword) {
+ sd->chip_revision = retword;
send_unknown(dev, SENSOR_PB0330);
return chipset_revision_sensor[i].internal_sensor_id;
}
@@ -6888,8 +6883,8 @@
reg_w(dev, 0x0a, 0x0010);
reg_w(dev, 0x03, 0x0012);
reg_w(dev, 0x01, 0x0012);
- retbyte = i2c_read(gspca_dev, 0x00);
- if (retbyte != 0) {
+ retword = i2c_read(gspca_dev, 0x00);
+ if (retword != 0) {
PDEBUG(D_PROBE, "probe 3wr vga type 0a ?");
return 0x0a; /* ?? */
}
@@ -6901,14 +6896,14 @@
reg_w(dev, 0x03, 0x0012);
msleep(2);
reg_w(dev, 0x01, 0x0012);
- retbyte = i2c_read(gspca_dev, 0x00);
- if (retbyte != 0) {
- PDEBUG(D_PROBE, "probe 3wr vga type %02x", retbyte);
- if (retbyte == 0x11) /* VF0250 */
+ retword = i2c_read(gspca_dev, 0x00);
+ if (retword != 0) {
+ PDEBUG(D_PROBE, "probe 3wr vga type %02x", retword);
+ if (retword == 0x0011) /* VF0250 */
return 0x0250;
- if (retbyte == 0x29) /* gc0305 */
+ if (retword == 0x0029) /* gc0305 */
send_unknown(dev, SENSOR_GC0305);
- return retbyte;
+ return retword;
}
reg_w(dev, 0x01, 0x0000); /* check OmniVision */
@@ -6918,8 +6913,8 @@
reg_w(dev, 0x06, 0x0010);
reg_w(dev, 0x01, 0x0012);
reg_w(dev, 0x05, 0x0012);
- if (i2c_read(gspca_dev, 0x1c) == 0x7f /* OV7610 - manufacturer ID */
- && i2c_read(gspca_dev, 0x1d) == 0xa2) {
+ if (i2c_read(gspca_dev, 0x1c) == 0x007f /* OV7610 - manufacturer ID */
+ && i2c_read(gspca_dev, 0x1d) == 0x00a2) {
send_unknown(dev, SENSOR_OV7620);
return 0x06; /* OmniVision confirm ? */
}
@@ -6933,16 +6928,14 @@
/* msleep(150); */
reg_w(dev, 0x01, 0x0012);
reg_w(dev, 0x05, 0x0012);
- retbyte = i2c_read(gspca_dev, 0x0000); /* ID 0 */
- checkword = retbyte << 8;
- retbyte = i2c_read(gspca_dev, 0x0001); /* ID 1 */
- checkword |= retbyte;
- PDEBUG(D_PROBE, "probe 3wr vga 2 0x%04x", checkword);
- if (checkword == 0x2030) {
+ retword = i2c_read(gspca_dev, 0x00) << 8; /* ID 0 */
+ retword |= i2c_read(gspca_dev, 0x01); /* ID 1 */
+ PDEBUG(D_PROBE, "probe 3wr vga 2 0x%04x", retword);
+ if (retword == 0x2030) {
retbyte = i2c_read(gspca_dev, 0x02); /* revision number */
PDEBUG(D_PROBE, "sensor PO2030 rev 0x%02x", retbyte);
send_unknown(dev, SENSOR_PO2030);
- return checkword;
+ return retword;
}
reg_w(dev, 0x01, 0x0000);
@@ -6953,9 +6946,9 @@
reg_w(dev, 0x01, 0x0012);
reg_w(dev, 0x05, 0x0001);
reg_w(dev, 0xd3, 0x008b);
- retbyte = i2c_read(gspca_dev, 0x01);
- if (retbyte != 0) {
- PDEBUG(D_PROBE, "probe 3wr vga type 0a ?");
+ retword = i2c_read(gspca_dev, 0x01);
+ if (retword != 0) {
+ PDEBUG(D_PROBE, "probe 3wr vga type 0a ? ret: %04x", retword);
return 0x0a; /* ?? */
}
return -1;