diff options
Diffstat (limited to 'linux/drivers/media/video/gspca/sn9c20x.c')
| -rw-r--r-- | linux/drivers/media/video/gspca/sn9c20x.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/linux/drivers/media/video/gspca/sn9c20x.c b/linux/drivers/media/video/gspca/sn9c20x.c index a516866a2..fc47f978e 100644 --- a/linux/drivers/media/video/gspca/sn9c20x.c +++ b/linux/drivers/media/video/gspca/sn9c20x.c @@ -1099,12 +1099,12 @@ int i2c_w(struct gspca_dev *gspca_dev, const u8 *buffer) reg_r(gspca_dev, 0x10c0, 1); if (gspca_dev->usb_buf[0] & 0x04) { if (gspca_dev->usb_buf[0] & 0x08) - return -1; + return -EIO; return 0; } msleep(1); } - return -1; + return -EIO; } int i2c_w1(struct gspca_dev *gspca_dev, u8 reg, u8 val) @@ -1155,7 +1155,7 @@ int i2c_r1(struct gspca_dev *gspca_dev, u8 reg, u8 *val) struct sd *sd = (struct sd *) gspca_dev; u8 row[8]; - row[0] = 0x81 | 0x10; + row[0] = 0x81 | (1 << 4); row[1] = sd->i2c_addr; row[2] = reg; row[3] = 0; @@ -1163,14 +1163,15 @@ int i2c_r1(struct gspca_dev *gspca_dev, u8 reg, u8 *val) row[5] = 0; row[6] = 0; row[7] = 0x10; - reg_w(gspca_dev, 0x10c0, row, 8); - msleep(1); - row[0] = 0x81 | (2 << 4) | 0x02; + if (i2c_w(gspca_dev, row) < 0) + return -EIO; + row[0] = 0x81 | (1 << 4) | 0x02; row[2] = 0; - reg_w(gspca_dev, 0x10c0, row, 8); - msleep(1); - reg_r(gspca_dev, 0x10c2, 5); - *val = gspca_dev->usb_buf[3]; + if (i2c_w(gspca_dev, row) < 0) + return -EIO; + if (reg_r(gspca_dev, 0x10c2, 5) < 0) + return -EIO; + *val = gspca_dev->usb_buf[4]; return 0; } @@ -1179,7 +1180,7 @@ int i2c_r2(struct gspca_dev *gspca_dev, u8 reg, u16 *val) struct sd *sd = (struct sd *) gspca_dev; u8 row[8]; - row[0] = 0x81 | 0x10; + row[0] = 0x81 | (1 << 4); row[1] = sd->i2c_addr; row[2] = reg; row[3] = 0; @@ -1187,14 +1188,15 @@ int i2c_r2(struct gspca_dev *gspca_dev, u8 reg, u16 *val) row[5] = 0; row[6] = 0; row[7] = 0x10; - reg_w(gspca_dev, 0x10c0, row, 8); - msleep(1); - row[0] = 0x81 | (3 << 4) | 0x02; + if (i2c_w(gspca_dev, row) < 0) + return -EIO; + row[0] = 0x81 | (2 << 4) | 0x02; row[2] = 0; - reg_w(gspca_dev, 0x10c0, row, 8); - msleep(1); - reg_r(gspca_dev, 0x10c2, 5); - *val = (gspca_dev->usb_buf[2] << 8) | gspca_dev->usb_buf[3]; + if (i2c_w(gspca_dev, row) < 0) + return -EIO; + if (reg_r(gspca_dev, 0x10c2, 5) < 0) + return -EIO; + *val = (gspca_dev->usb_buf[3] << 8) | gspca_dev->usb_buf[4]; return 0; } |