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V4L/DVB (13250): gspca - zc3xx: Add some delays and warn on i2c errors.

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This patch fixes the kernel bug 14195 (random errors - bad images -
with the webcam 10fd:8050 - sensor tas5130cxx).

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine 2009-10-20 05:25:16 -03:00 committed by Mauro Carvalho Chehab
parent 56e93ed9cf
commit 721ecbcbea
1 changed files with 9 additions and 6 deletions
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15
drivers/media/video/gspca/zc3xx.c
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@ -6036,8 +6036,10 @@ static __u16 i2c_read(struct gspca_dev *gspca_dev,
reg_w_i(gspca_dev->dev, reg, 0x0092);
reg_w_i(gspca_dev->dev, 0x02, 0x0090); /* <- read command */
msleep(25);
msleep(20);
retbyte = reg_r_i(gspca_dev, 0x0091); /* read status */
if (retbyte != 0x00)
err("i2c_r status error %02x", retbyte);
retval = reg_r_i(gspca_dev, 0x0095); /* read Lowbyte */
retval |= reg_r_i(gspca_dev, 0x0096) << 8; /* read Hightbyte */
PDEBUG(D_USBI, "i2c r [%02x] -> %04x (%02x)",
@ -6056,8 +6058,10 @@ static __u8 i2c_write(struct gspca_dev *gspca_dev,
reg_w_i(gspca_dev->dev, valL, 0x93);
reg_w_i(gspca_dev->dev, valH, 0x94);
reg_w_i(gspca_dev->dev, 0x01, 0x90); /* <- write command */
msleep(15);
msleep(1);
retbyte = reg_r_i(gspca_dev, 0x0091); /* read status */
if (retbyte != 0x00)
err("i2c_w status error %02x", retbyte);
PDEBUG(D_USBO, "i2c w [%02x] = %02x%02x (%02x)",
reg, valH, valL, retbyte);
return retbyte;
@ -6092,7 +6096,7 @@ static void usb_exchange(struct gspca_dev *gspca_dev,
break;
}
action++;
/* msleep(1); */
msleep(1);
}
}
@ -6555,7 +6559,7 @@ static int vga_2wr_probe(struct gspca_dev *gspca_dev)
start_2wr_probe(dev, 0x0e); /* PAS202BCB */
reg_w(dev, 0x08, 0x008d);
i2c_write(gspca_dev, 0x03, 0xaa, 0x00);
msleep(500);
msleep(50);
retword = i2c_read(gspca_dev, 0x03);
if (retword != 0)
return 0x0e; /* PAS202BCB */
@ -6699,7 +6703,6 @@ static int vga_3wr_probe(struct gspca_dev *gspca_dev)
reg_w(dev, 0x01, 0x0001);
reg_w(dev, 0xee, 0x008b);
reg_w(dev, 0x03, 0x0012);
/* msleep(150); */
reg_w(dev, 0x01, 0x0012);
reg_w(dev, 0x05, 0x0012);
retword = i2c_read(gspca_dev, 0x00) << 8; /* ID 0 */
@ -7100,7 +7103,7 @@ static int sd_start(struct gspca_dev *gspca_dev)
setautogain(gspca_dev);
switch (sd->sensor) {
case SENSOR_PO2030:
msleep(500);
msleep(50);
reg_r(gspca_dev, 0x0008);
reg_r(gspca_dev, 0x0007);
/*fall thru*/