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path: root/drivers/media/video/gspca/gspca.c
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Diffstat (limited to 'drivers/media/video/gspca/gspca.c')
-rw-r--r--drivers/media/video/gspca/gspca.c167
1 files changed, 98 insertions, 69 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 65e4901f4db7..a2741d7dccfe 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -38,15 +38,16 @@
#include "gspca.h"
/* global values */
-#define DEF_NURBS 2 /* default number of URBs */
+#define DEF_NURBS 3 /* default number of URBs */
+#if DEF_NURBS > MAX_NURBS
+#error "DEF_NURBS too big"
+#endif
MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
MODULE_DESCRIPTION("GSPCA USB Camera Driver");
MODULE_LICENSE("GPL");
-#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 4, 0)
-
-static int video_nr = -1;
+#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 5, 0)
#ifdef GSPCA_DEBUG
int gspca_debug = D_ERR | D_PROBE;
@@ -126,16 +127,18 @@ static void fill_frame(struct gspca_dev *gspca_dev,
struct urb *urb)
{
struct gspca_frame *frame;
- __u8 *data; /* address of data in the iso message */
+ u8 *data; /* address of data in the iso message */
int i, len, st;
cam_pkt_op pkt_scan;
if (urb->status != 0) {
+ if (urb->status == -ESHUTDOWN)
+ return; /* disconnection */
#ifdef CONFIG_PM
if (!gspca_dev->frozen)
#endif
PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
- return; /* disconnection ? */
+ return;
}
pkt_scan = gspca_dev->sd_desc->pkt_scan;
for (i = 0; i < urb->number_of_packets; i++) {
@@ -166,7 +169,7 @@ static void fill_frame(struct gspca_dev *gspca_dev,
/* let the packet be analyzed by the subdriver */
PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
i, urb->iso_frame_desc[i].offset, len);
- data = (__u8 *) urb->transfer_buffer
+ data = (u8 *) urb->transfer_buffer
+ urb->iso_frame_desc[i].offset;
pkt_scan(gspca_dev, frame, data, len);
}
@@ -182,8 +185,7 @@ static void fill_frame(struct gspca_dev *gspca_dev,
*
* Analyse each packet and call the subdriver for copy to the frame buffer.
*/
-static void isoc_irq(struct urb *urb
-)
+static void isoc_irq(struct urb *urb)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
@@ -196,8 +198,7 @@ static void isoc_irq(struct urb *urb
/*
* bulk message interrupt from the USB device
*/
-static void bulk_irq(struct urb *urb
-)
+static void bulk_irq(struct urb *urb)
{
struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
struct gspca_frame *frame;
@@ -209,6 +210,8 @@ static void bulk_irq(struct urb *urb
switch (urb->status) {
case 0:
break;
+ case -ESHUTDOWN:
+ return; /* disconnection */
case -ECONNRESET:
urb->status = 0;
break;
@@ -217,7 +220,7 @@ static void bulk_irq(struct urb *urb
if (!gspca_dev->frozen)
#endif
PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
- return; /* disconnection ? */
+ return;
}
/* check the availability of the frame buffer */
@@ -322,6 +325,7 @@ static int gspca_is_compressed(__u32 format)
case V4L2_PIX_FMT_JPEG:
case V4L2_PIX_FMT_SPCA561:
case V4L2_PIX_FMT_PAC207:
+ case V4L2_PIX_FMT_MR97310A:
return 1;
}
return 0;
@@ -422,10 +426,8 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
if (urb == NULL)
break;
- BUG_ON(!gspca_dev->dev);
gspca_dev->urb[i] = NULL;
- if (!gspca_dev->present)
- usb_kill_urb(urb);
+ usb_kill_urb(urb);
if (urb->transfer_buffer != NULL)
usb_buffer_free(gspca_dev->dev,
urb->transfer_buffer_length,
@@ -439,22 +441,16 @@ static void destroy_urbs(struct gspca_dev *gspca_dev)
* look for an input transfer endpoint in an alternate setting
*/
static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
- __u8 epaddr,
__u8 xfer)
{
struct usb_host_endpoint *ep;
int i, attr;
- epaddr |= USB_DIR_IN;
for (i = 0; i < alt->desc.bNumEndpoints; i++) {
ep = &alt->endpoint[i];
- if (ep->desc.bEndpointAddress == epaddr) {
- attr = ep->desc.bmAttributes
- & USB_ENDPOINT_XFERTYPE_MASK;
- if (attr == xfer)
- return ep;
- break;
- }
+ attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+ if (attr == xfer)
+ return ep;
}
return NULL;
}
@@ -478,23 +474,23 @@ static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
i = gspca_dev->alt; /* previous alt setting */
/* try isoc */
- while (--i > 0) { /* alt 0 is unusable */
+ while (--i >= 0) {
ep = alt_xfer(&intf->altsetting[i],
- gspca_dev->cam.epaddr,
USB_ENDPOINT_XFER_ISOC);
if (ep)
break;
}
- /* if no isoc, try bulk */
+ /* if no isoc, try bulk (alt 0 only) */
if (ep == NULL) {
ep = alt_xfer(&intf->altsetting[0],
- gspca_dev->cam.epaddr,
USB_ENDPOINT_XFER_BULK);
if (ep == NULL) {
err("no transfer endpoint found");
return NULL;
}
+ i = 0;
+ gspca_dev->bulk = 1;
}
PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
i, ep->desc.bEndpointAddress);
@@ -521,7 +517,7 @@ static int create_urbs(struct gspca_dev *gspca_dev,
/* calculate the packet size and the number of packets */
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
- if (gspca_dev->alt != 0) { /* isoc */
+ if (!gspca_dev->bulk) { /* isoc */
/* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
@@ -601,6 +597,11 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
+ if (!gspca_dev->present) {
+ ret = -ENODEV;
+ goto out;
+ }
+
/* set the higher alternate setting and
* loop until urb submit succeeds */
gspca_dev->alt = gspca_dev->nbalt;
@@ -616,10 +617,9 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
goto out;
/* clear the bulk endpoint */
- if (gspca_dev->alt == 0) /* if bulk transfer */
+ if (gspca_dev->bulk)
usb_clear_halt(gspca_dev->dev,
- usb_rcvintpipe(gspca_dev->dev,
- gspca_dev->cam.epaddr));
+ gspca_dev->urb[0]->pipe);
/* start the cam */
ret = gspca_dev->sd_desc->start(gspca_dev);
@@ -630,7 +630,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
gspca_dev->streaming = 1;
/* some bulk transfers are started by the subdriver */
- if (gspca_dev->alt == 0 && gspca_dev->cam.bulk_nurbs == 0)
+ if (gspca_dev->bulk && gspca_dev->cam.bulk_nurbs == 0)
break;
/* submit the URBs */
@@ -671,11 +671,14 @@ static int gspca_set_alt0(struct gspca_dev *gspca_dev)
static void gspca_stream_off(struct gspca_dev *gspca_dev)
{
gspca_dev->streaming = 0;
- if (gspca_dev->present
- && gspca_dev->sd_desc->stopN)
- gspca_dev->sd_desc->stopN(gspca_dev);
- destroy_urbs(gspca_dev);
- gspca_set_alt0(gspca_dev);
+ if (gspca_dev->present) {
+ if (gspca_dev->sd_desc->stopN)
+ gspca_dev->sd_desc->stopN(gspca_dev);
+ destroy_urbs(gspca_dev);
+ gspca_set_alt0(gspca_dev);
+ }
+
+ /* always call stop0 to free the subdriver's resources */
if (gspca_dev->sd_desc->stop0)
gspca_dev->sd_desc->stop0(gspca_dev);
PDEBUG(D_STREAM, "stream off OK");
@@ -762,7 +765,6 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
fmtdesc->pixelformat = fmt_tb[index];
if (gspca_is_compressed(fmt_tb[index]))
fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
- fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
@@ -957,8 +959,15 @@ static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct gspca_dev *gspca_dev = priv;
+ int ret;
- memset(cap, 0, sizeof *cap);
+ /* protect the access to the usb device */
+ if (mutex_lock_interruptible(&gspca_dev->usb_lock))
+ return -ERESTARTSYS;
+ if (!gspca_dev->present) {
+ ret = -ENODEV;
+ goto out;
+ }
strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
if (gspca_dev->dev->product != NULL) {
strncpy(cap->card, gspca_dev->dev->product,
@@ -969,13 +978,15 @@ static int vidioc_querycap(struct file *file, void *priv,
le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
}
- strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name,
- sizeof cap->bus_info);
+ usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
cap->version = DRIVER_VERSION_NUMBER;
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
| V4L2_CAP_READWRITE;
- return 0;
+ ret = 0;
+out:
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
}
static int vidioc_queryctrl(struct file *file, void *priv,
@@ -1038,7 +1049,10 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
- ret = ctrls->set(gspca_dev, ctrl->value);
+ if (gspca_dev->present)
+ ret = ctrls->set(gspca_dev, ctrl->value);
+ else
+ ret = -ENODEV;
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1062,7 +1076,10 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
return -EINVAL;
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
- ret = ctrls->get(gspca_dev, &ctrl->value);
+ if (gspca_dev->present)
+ ret = ctrls->get(gspca_dev, &ctrl->value);
+ else
+ ret = -ENODEV;
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1081,7 +1098,6 @@ static int vidioc_s_audio(struct file *file, void *priv,
static int vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *audio)
{
- memset(audio, 0, sizeof *audio);
strcpy(audio->name, "Microphone");
return 0;
}
@@ -1115,8 +1131,8 @@ static int vidioc_enum_input(struct file *file, void *priv,
if (input->index != 0)
return -EINVAL;
- memset(input, 0, sizeof *input);
input->type = V4L2_INPUT_TYPE_CAMERA;
+ input->status = gspca_dev->cam.input_flags;
strncpy(input->name, gspca_dev->sd_desc->name,
sizeof input->name);
return 0;
@@ -1224,10 +1240,7 @@ static int vidioc_streamon(struct file *file, void *priv,
return -EINVAL;
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
return -ERESTARTSYS;
- if (!gspca_dev->present) {
- ret = -ENODEV;
- goto out;
- }
+
if (gspca_dev->nframes == 0
|| !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
ret = -EINVAL;
@@ -1295,7 +1308,10 @@ static int vidioc_g_jpegcomp(struct file *file, void *priv,
return -EINVAL;
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
- ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
+ if (gspca_dev->present)
+ ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
+ else
+ ret = -ENODEV;
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1310,7 +1326,10 @@ static int vidioc_s_jpegcomp(struct file *file, void *priv,
return -EINVAL;
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
- ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
+ if (gspca_dev->present)
+ ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
+ else
+ ret = -ENODEV;
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1320,8 +1339,6 @@ static int vidioc_g_parm(struct file *filp, void *priv,
{
struct gspca_dev *gspca_dev = priv;
- memset(parm, 0, sizeof *parm);
- parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
parm->parm.capture.readbuffers = gspca_dev->nbufread;
if (gspca_dev->sd_desc->get_streamparm) {
@@ -1329,7 +1346,11 @@ static int vidioc_g_parm(struct file *filp, void *priv,
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
- ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
+ if (gspca_dev->present)
+ ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
+ parm);
+ else
+ ret = -ENODEV;
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1354,7 +1375,11 @@ static int vidioc_s_parm(struct file *filp, void *priv,
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
- ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
+ if (gspca_dev->present)
+ ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
+ parm);
+ else
+ ret = -ENODEV;
mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1382,7 +1407,6 @@ static int vidiocgmbuf(struct file *file, void *priv,
{
struct v4l2_format fmt;
- memset(&fmt, 0, sizeof fmt);
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
i = gspca_dev->cam.nmodes - 1; /* highest mode */
fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
@@ -1528,7 +1552,8 @@ static int frame_wait(struct gspca_dev *gspca_dev,
if (gspca_dev->sd_desc->dq_callback) {
mutex_lock(&gspca_dev->usb_lock);
- gspca_dev->sd_desc->dq_callback(gspca_dev);
+ if (gspca_dev->present)
+ gspca_dev->sd_desc->dq_callback(gspca_dev);
mutex_unlock(&gspca_dev->usb_lock);
}
return j;
@@ -1550,6 +1575,9 @@ static int vidioc_dqbuf(struct file *file, void *priv,
if (v4l2_buf->memory != gspca_dev->memory)
return -EINVAL;
+ if (!gspca_dev->present)
+ return -ENODEV;
+
/* if not streaming, be sure the application will not loop forever */
if (!(file->f_flags & O_NONBLOCK)
&& !gspca_dev->streaming && gspca_dev->users == 1)
@@ -1700,8 +1728,6 @@ static unsigned int dev_poll(struct file *file, poll_table *wait)
PDEBUG(D_FRAM, "poll");
poll_wait(file, &gspca_dev->wq, wait);
- if (!gspca_dev->present)
- return POLLERR;
/* if reqbufs is not done, the user would use read() */
if (gspca_dev->nframes == 0) {
@@ -1714,10 +1740,6 @@ static unsigned int dev_poll(struct file *file, poll_table *wait)
if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
return POLLERR;
- if (!gspca_dev->present) {
- ret = POLLERR;
- goto out;
- }
/* check the next incoming buffer */
i = gspca_dev->fr_o;
@@ -1726,8 +1748,9 @@ static unsigned int dev_poll(struct file *file, poll_table *wait)
ret = POLLIN | POLLRDNORM; /* something to read */
else
ret = 0;
-out:
mutex_unlock(&gspca_dev->queue_lock);
+ if (!gspca_dev->present)
+ return POLLHUP;
return ret;
}
@@ -1925,7 +1948,7 @@ int gspca_dev_probe(struct usb_interface *intf,
gspca_dev->present = 1;
ret = video_register_device(&gspca_dev->vdev,
VFL_TYPE_GRABBER,
- video_nr);
+ -1);
if (ret < 0) {
err("video_register_device err %d", ret);
goto out;
@@ -1953,10 +1976,16 @@ void gspca_disconnect(struct usb_interface *intf)
mutex_lock(&gspca_dev->usb_lock);
gspca_dev->present = 0;
- mutex_unlock(&gspca_dev->usb_lock);
- destroy_urbs(gspca_dev);
+ if (gspca_dev->streaming) {
+ destroy_urbs(gspca_dev);
+ wake_up_interruptible(&gspca_dev->wq);
+ }
+
+ /* the device is freed at exit of this function */
gspca_dev->dev = NULL;
+ mutex_unlock(&gspca_dev->usb_lock);
+
usb_set_intfdata(intf, NULL);
/* release the device */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.