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path: root/drivers/media/video/gspca/stk014.c
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Diffstat (limited to 'drivers/media/video/gspca/stk014.c')
-rw-r--r--drivers/media/video/gspca/stk014.c117
1 files changed, 59 insertions, 58 deletions
diff --git a/drivers/media/video/gspca/stk014.c b/drivers/media/video/gspca/stk014.c
index 47628964801e..2e2935532d99 100644
--- a/drivers/media/video/gspca/stk014.c
+++ b/drivers/media/video/gspca/stk014.c
@@ -126,12 +126,14 @@ static const struct v4l2_pix_format vga_mode[] = {
};
/* -- read a register -- */
-static int reg_r(struct gspca_dev *gspca_dev,
+static u8 reg_r(struct gspca_dev *gspca_dev,
__u16 index)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
+ if (gspca_dev->usb_err < 0)
+ return 0;
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
0x00,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
@@ -141,18 +143,21 @@ static int reg_r(struct gspca_dev *gspca_dev,
500);
if (ret < 0) {
PDEBUG(D_ERR, "reg_r err %d", ret);
- return ret;
+ gspca_dev->usb_err = ret;
+ return 0;
}
return gspca_dev->usb_buf[0];
}
/* -- write a register -- */
-static int reg_w(struct gspca_dev *gspca_dev,
+static void reg_w(struct gspca_dev *gspca_dev,
__u16 index, __u16 value)
{
struct usb_device *dev = gspca_dev->dev;
int ret;
+ if (gspca_dev->usb_err < 0)
+ return;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0x01,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
@@ -161,13 +166,14 @@ static int reg_w(struct gspca_dev *gspca_dev,
NULL,
0,
500);
- if (ret < 0)
+ if (ret < 0) {
PDEBUG(D_ERR, "reg_w err %d", ret);
- return ret;
+ gspca_dev->usb_err = ret;
+ }
}
/* -- get a bulk value (4 bytes) -- */
-static int rcv_val(struct gspca_dev *gspca_dev,
+static void rcv_val(struct gspca_dev *gspca_dev,
int ads)
{
struct usb_device *dev = gspca_dev->dev;
@@ -182,17 +188,22 @@ static int rcv_val(struct gspca_dev *gspca_dev,
reg_w(gspca_dev, 0x63a, 0);
reg_w(gspca_dev, 0x63b, 0);
reg_w(gspca_dev, 0x630, 5);
+ if (gspca_dev->usb_err < 0)
+ return;
ret = usb_bulk_msg(dev,
usb_rcvbulkpipe(dev, 0x05),
gspca_dev->usb_buf,
4, /* length */
&alen,
500); /* timeout in milliseconds */
- return ret;
+ if (ret < 0) {
+ PDEBUG(D_ERR, "rcv_val err %d", ret);
+ gspca_dev->usb_err = ret;
+ }
}
/* -- send a bulk value -- */
-static int snd_val(struct gspca_dev *gspca_dev,
+static void snd_val(struct gspca_dev *gspca_dev,
int ads,
unsigned int val)
{
@@ -201,16 +212,9 @@ static int snd_val(struct gspca_dev *gspca_dev,
__u8 seq = 0;
if (ads == 0x003f08) {
- ret = reg_r(gspca_dev, 0x0704);
- if (ret < 0)
- goto ko;
- ret = reg_r(gspca_dev, 0x0705);
- if (ret < 0)
- goto ko;
- seq = ret; /* keep the sequence number */
- ret = reg_r(gspca_dev, 0x0650);
- if (ret < 0)
- goto ko;
+ reg_r(gspca_dev, 0x0704);
+ seq = reg_r(gspca_dev, 0x0705);
+ reg_r(gspca_dev, 0x0650);
reg_w(gspca_dev, 0x654, seq);
} else {
reg_w(gspca_dev, 0x654, (ads >> 16) & 0xff);
@@ -223,6 +227,8 @@ static int snd_val(struct gspca_dev *gspca_dev,
reg_w(gspca_dev, 0x65a, 0);
reg_w(gspca_dev, 0x65b, 0);
reg_w(gspca_dev, 0x650, 5);
+ if (gspca_dev->usb_err < 0)
+ return;
gspca_dev->usb_buf[0] = val >> 24;
gspca_dev->usb_buf[1] = val >> 16;
gspca_dev->usb_buf[2] = val >> 8;
@@ -233,24 +239,23 @@ static int snd_val(struct gspca_dev *gspca_dev,
4,
&alen,
500); /* timeout in milliseconds */
- if (ret < 0)
- goto ko;
- if (ads == 0x003f08) {
- seq += 4;
- seq &= 0x3f;
- reg_w(gspca_dev, 0x705, seq);
+ if (ret < 0) {
+ PDEBUG(D_ERR, "snd_val err %d", ret);
+ gspca_dev->usb_err = ret;
+ } else {
+ if (ads == 0x003f08) {
+ seq += 4;
+ seq &= 0x3f;
+ reg_w(gspca_dev, 0x705, seq);
+ }
}
- return ret;
-ko:
- PDEBUG(D_ERR, "snd_val err %d", ret);
- return ret;
}
/* set a camera parameter */
-static int set_par(struct gspca_dev *gspca_dev,
+static void set_par(struct gspca_dev *gspca_dev,
int parval)
{
- return snd_val(gspca_dev, 0x003f08, parval);
+ snd_val(gspca_dev, 0x003f08, parval);
}
static void setbrightness(struct gspca_dev *gspca_dev)
@@ -311,18 +316,18 @@ static int sd_config(struct gspca_dev *gspca_dev,
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
- int ret;
+ u8 ret;
/* check if the device responds */
usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
ret = reg_r(gspca_dev, 0x0740);
- if (ret < 0)
- return ret;
- if (ret != 0xff) {
- PDEBUG(D_ERR|D_STREAM, "init reg: 0x%02x", ret);
- return -1;
+ if (gspca_dev->usb_err >= 0) {
+ if (ret != 0xff) {
+ PDEBUG(D_ERR|D_STREAM, "init reg: 0x%02x", ret);
+ gspca_dev->usb_err = -EIO;
+ }
}
- return 0;
+ return gspca_dev->usb_err;
}
/* -- start the camera -- */
@@ -357,15 +362,12 @@ static int sd_start(struct gspca_dev *gspca_dev)
if (ret < 0) {
PDEBUG(D_ERR|D_STREAM, "set intf %d %d failed",
gspca_dev->iface, gspca_dev->alt);
+ gspca_dev->usb_err = ret;
goto out;
}
- ret = reg_r(gspca_dev, 0x0630);
- if (ret < 0)
- goto out;
+ reg_r(gspca_dev, 0x0630);
rcv_val(gspca_dev, 0x000020); /* << (value ff ff ff ff) */
- ret = reg_r(gspca_dev, 0x0650);
- if (ret < 0)
- goto out;
+ reg_r(gspca_dev, 0x0650);
snd_val(gspca_dev, 0x000020, 0xffffffff);
reg_w(gspca_dev, 0x0620, 0);
reg_w(gspca_dev, 0x0630, 0);
@@ -384,11 +386,11 @@ static int sd_start(struct gspca_dev *gspca_dev)
/* start the video flow */
set_par(gspca_dev, 0x01000000);
set_par(gspca_dev, 0x01000000);
- PDEBUG(D_STREAM, "camera started alt: 0x%02x", gspca_dev->alt);
- return 0;
+ if (gspca_dev->usb_err >= 0)
+ PDEBUG(D_STREAM, "camera started alt: 0x%02x",
+ gspca_dev->alt);
out:
- PDEBUG(D_ERR|D_STREAM, "camera start err %d", ret);
- return ret;
+ return gspca_dev->usb_err;
}
static void sd_stopN(struct gspca_dev *gspca_dev)
@@ -418,8 +420,7 @@ static void sd_stop0(struct gspca_dev *gspca_dev)
}
static void sd_pkt_scan(struct gspca_dev *gspca_dev,
- struct gspca_frame *frame, /* target */
- __u8 *data, /* isoc packet */
+ u8 *data, /* isoc packet */
int len) /* iso packet length */
{
struct sd *sd = (struct sd *) gspca_dev;
@@ -435,11 +436,11 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
* (without ending - ff d9)
*/
if (data[0] == 0xff && data[1] == 0xfe) {
- frame = gspca_frame_add(gspca_dev, LAST_PACKET, frame,
- ffd9, 2);
+ gspca_frame_add(gspca_dev, LAST_PACKET,
+ ffd9, 2);
/* put the JPEG 411 header */
- gspca_frame_add(gspca_dev, FIRST_PACKET, frame,
+ gspca_frame_add(gspca_dev, FIRST_PACKET,
sd->jpeg_hdr, JPEG_HDR_SZ);
/* beginning of the frame */
@@ -447,7 +448,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
data += STKHDRSZ;
len -= STKHDRSZ;
}
- gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
+ gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}
static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
@@ -457,7 +458,7 @@ static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
sd->brightness = val;
if (gspca_dev->streaming)
setbrightness(gspca_dev);
- return 0;
+ return gspca_dev->usb_err;
}
static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
@@ -475,7 +476,7 @@ static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
sd->contrast = val;
if (gspca_dev->streaming)
setcontrast(gspca_dev);
- return 0;
+ return gspca_dev->usb_err;
}
static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
@@ -493,7 +494,7 @@ static int sd_setcolors(struct gspca_dev *gspca_dev, __s32 val)
sd->colors = val;
if (gspca_dev->streaming)
setcolors(gspca_dev);
- return 0;
+ return gspca_dev->usb_err;
}
static int sd_getcolors(struct gspca_dev *gspca_dev, __s32 *val)
@@ -511,7 +512,7 @@ static int sd_setfreq(struct gspca_dev *gspca_dev, __s32 val)
sd->lightfreq = val;
if (gspca_dev->streaming)
setfreq(gspca_dev);
- return 0;
+ return gspca_dev->usb_err;
}
static int sd_getfreq(struct gspca_dev *gspca_dev, __s32 *val)
@@ -553,7 +554,7 @@ static int sd_set_jcomp(struct gspca_dev *gspca_dev,
sd->quality = jcomp->quality;
if (gspca_dev->streaming)
jpeg_set_qual(sd->jpeg_hdr, sd->quality);
- return 0;
+ return gspca_dev->usb_err;
}
static int sd_get_jcomp(struct gspca_dev *gspca_dev,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.