#include <linux/string.h>
#include <linux/pagemap.h>
#include <linux/io.h>
+#include <linux/kref.h>
#include <asm/page.h>
#include <linux/uaccess.h>
#include <linux/jiffies.h>
MODULE_DESCRIPTION("GSPCA USB Camera Driver");
MODULE_LICENSE("GPL");
-#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 2, 0)
+#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 3, 0)
static int video_nr = -1;
.close = gspca_vm_close,
};
+/* get the current input frame buffer */
+struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
+{
+ struct gspca_frame *frame;
+ int i;
+
+ i = gspca_dev->fr_i;
+ i = gspca_dev->fr_queue[i];
+ frame = &gspca_dev->frame[i];
+ if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
+ != V4L2_BUF_FLAG_QUEUED)
+ return NULL;
+ return frame;
+}
+EXPORT_SYMBOL(gspca_get_i_frame);
+
/*
* fill a video frame from an URB and resubmit
*/
{
struct gspca_frame *frame;
__u8 *data; /* address of data in the iso message */
- int i, j, len, st;
+ int i, len, st;
cam_pkt_op pkt_scan;
if (urb->status != 0) {
for (i = 0; i < urb->number_of_packets; i++) {
/* check the availability of the frame buffer */
- j = gspca_dev->fr_i;
- j = gspca_dev->fr_queue[j];
- frame = &gspca_dev->frame[j];
- if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
- != V4L2_BUF_FLAG_QUEUED) {
+ frame = gspca_get_i_frame(gspca_dev);
+ if (!frame) {
gspca_dev->last_packet_type = DISCARD_PACKET;
break;
}
fill_frame(gspca_dev, urb);
}
+/*
+ * bulk message interrupt from the USB device
+ */
+static void bulk_irq(struct urb *urb
+)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ struct gspca_frame *frame;
+
+ PDEBUG(D_PACK, "bulk irq");
+ if (!gspca_dev->streaming)
+ return;
+ if (urb->status != 0 && urb->status != -ECONNRESET) {
+#ifdef CONFIG_PM
+ if (!gspca_dev->frozen)
+#endif
+ PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
+ return; /* disconnection ? */
+ }
+
+ /* check the availability of the frame buffer */
+ frame = gspca_get_i_frame(gspca_dev);
+ if (!frame) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ } else {
+ PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
+ gspca_dev->sd_desc->pkt_scan(gspca_dev,
+ frame,
+ urb->transfer_buffer,
+ urb->actual_length);
+ }
+}
+
/*
* add data to the current frame
*
* On LAST_PACKET, a new frame is returned.
*/
struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
- int packet_type,
+ enum gspca_packet_type packet_type,
struct gspca_frame *frame,
const __u8 *data,
int len)
}
gspca_dev->last_packet_type = packet_type;
- /* if last packet, wake the application and advance in the queue */
+ /* if last packet, wake up the application and advance in the queue */
if (packet_type == LAST_PACKET) {
frame->v4l2_buf.bytesused = frame->data_end - frame->data;
frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
void *mem;
unsigned long adr;
-/* size = PAGE_ALIGN(size); (already done) */
mem = vmalloc_32(size);
if (mem != NULL) {
adr = (unsigned long) mem;
unsigned int i;
PDEBUG(D_STREAM, "kill transfer");
- for (i = 0; i < MAX_NURBS; ++i) {
+ for (i = 0; i < MAX_NURBS; i++) {
urb = gspca_dev->urb[i];
if (urb == NULL)
break;
}
/*
- * search an input isochronous endpoint in an alternate setting
+ * look for an input transfer endpoint in an alternate setting
*/
-static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
- __u8 epaddr)
+static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
+ __u8 epaddr,
+ __u8 xfer)
{
struct usb_host_endpoint *ep;
int i, attr;
if (ep->desc.bEndpointAddress == epaddr) {
attr = ep->desc.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK;
- if (attr == USB_ENDPOINT_XFER_ISOC)
+ if (attr == xfer)
return ep;
break;
}
}
/*
- * search an input isochronous endpoint
+ * look for an input (isoc or bulk) endpoint
*
* The endpoint is defined by the subdriver.
* Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
* This routine may be called many times when the bandwidth is too small
* (the bandwidth is checked on urb submit).
*/
-static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
+static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
{
struct usb_interface *intf;
struct usb_host_endpoint *ep;
intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
ep = NULL;
i = gspca_dev->alt; /* previous alt setting */
+
+ /* try isoc */
while (--i > 0) { /* alt 0 is unusable */
- ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr);
+ ep = alt_xfer(&intf->altsetting[i],
+ gspca_dev->cam.epaddr,
+ USB_ENDPOINT_XFER_ISOC);
if (ep)
break;
}
+
+ /* if no isoc, try bulk */
if (ep == NULL) {
- err("no ISOC endpoint found");
- return 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;
+ }
}
- PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x",
+ PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
i, ep->desc.bEndpointAddress);
- ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
- if (ret < 0) {
- err("set interface err %d", ret);
- return NULL;
+ if (i > 0) {
+ ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
+ if (ret < 0) {
+ err("set interface err %d", ret);
+ return NULL;
+ }
}
gspca_dev->alt = i; /* memorize the current alt setting */
return ep;
}
/*
- * create the isochronous URBs
+ * create the URBs for image transfer
*/
static int create_urbs(struct gspca_dev *gspca_dev,
struct usb_host_endpoint *ep)
/* calculate the packet size and the number of packets */
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
- /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
- psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
- npkt = ISO_MAX_SIZE / psize;
- if (npkt > ISO_MAX_PKT)
- npkt = ISO_MAX_PKT;
- bsize = psize * npkt;
- PDEBUG(D_STREAM,
- "isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize);
- nurbs = DEF_NURBS;
+ if (gspca_dev->alt != 0) { /* isoc */
+
+ /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
+ psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
+ npkt = ISO_MAX_SIZE / psize;
+ if (npkt > ISO_MAX_PKT)
+ npkt = ISO_MAX_PKT;
+ bsize = psize * npkt;
+ PDEBUG(D_STREAM,
+ "isoc %d pkts size %d = bsize:%d",
+ npkt, psize, bsize);
+ nurbs = DEF_NURBS;
+ } else { /* bulk */
+ npkt = 0;
+ bsize = gspca_dev->cam. bulk_size;
+ if (bsize == 0)
+ bsize = psize;
+ PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
+ nurbs = 1;
+ }
+
gspca_dev->nurbs = nurbs;
for (n = 0; n < nurbs; n++) {
urb = usb_alloc_urb(npkt, GFP_KERNEL);
gspca_dev->urb[n] = urb;
urb->dev = gspca_dev->dev;
urb->context = gspca_dev;
- urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
- ep->desc.bEndpointAddress);
- urb->transfer_flags = URB_ISO_ASAP
- | URB_NO_TRANSFER_DMA_MAP;
- urb->interval = ep->desc.bInterval;
- urb->complete = isoc_irq;
- urb->number_of_packets = npkt;
urb->transfer_buffer_length = bsize;
- for (i = 0; i < npkt; i++) {
- urb->iso_frame_desc[i].length = psize;
- urb->iso_frame_desc[i].offset = psize * i;
+ if (npkt != 0) { /* ISOC */
+ urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
+ ep->desc.bEndpointAddress);
+ urb->transfer_flags = URB_ISO_ASAP
+ | URB_NO_TRANSFER_DMA_MAP;
+ urb->interval = ep->desc.bInterval;
+ urb->complete = isoc_irq;
+ urb->number_of_packets = npkt;
+ for (i = 0; i < npkt; i++) {
+ urb->iso_frame_desc[i].length = psize;
+ urb->iso_frame_desc[i].offset = psize * i;
+ }
+ } else { /* bulk */
+ urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
+ ep->desc.bEndpointAddress),
+ urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ urb->complete = bulk_irq;
}
}
return 0;
gspca_dev->alt = gspca_dev->nbalt;
for (;;) {
PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
- ep = get_isoc_ep(gspca_dev);
+ ep = get_ep(gspca_dev);
if (ep == NULL) {
ret = -EIO;
goto out;
goto out;
/* start the cam */
- gspca_dev->sd_desc->start(gspca_dev);
+ ret = gspca_dev->sd_desc->start(gspca_dev);
+ if (ret < 0) {
+ destroy_urbs(gspca_dev);
+ goto out;
+ }
gspca_dev->streaming = 1;
atomic_set(&gspca_dev->nevent, 0);
+ /* bulk transfers are started by the subdriver */
+ if (gspca_dev->alt == 0)
+ break;
+
/* submit the URBs */
for (n = 0; n < gspca_dev->nurbs; n++) {
ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL);
return ret;
}
-/* Note both the queue and the usb lock should be hold when calling this */
+/* Note: both the queue and the usb locks should be held when calling this */
static void gspca_stream_off(struct gspca_dev *gspca_dev)
{
gspca_dev->streaming = 0;
return ret;
}
+static void gspca_delete(struct kref *kref)
+{
+ struct gspca_dev *gspca_dev = container_of(kref, struct gspca_dev, kref);
+
+ PDEBUG(D_STREAM, "device deleted");
+
+ kfree(gspca_dev->usb_buf);
+ kfree(gspca_dev);
+}
+
static int dev_open(struct inode *inode, struct file *file)
{
struct gspca_dev *gspca_dev;
goto out;
}
gspca_dev->users++;
+
+ /* one more user */
+ kref_get(&gspca_dev->kref);
+
file->private_data = gspca_dev;
#ifdef GSPCA_DEBUG
/* activate the v4l2 debug */
if (gspca_debug & D_V4L2)
- gspca_dev->vdev.debug |= 3;
+ gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
+ | V4L2_DEBUG_IOCTL_ARG;
else
- gspca_dev->vdev.debug &= ~3;
+ gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
+ | V4L2_DEBUG_IOCTL_ARG);
#endif
ret = 0;
out:
}
file->private_data = NULL;
mutex_unlock(&gspca_dev->queue_lock);
+
PDEBUG(D_STREAM, "close done");
+
+ kref_put(&gspca_dev->kref, gspca_delete);
+
return 0;
}
memset(cap, 0, sizeof *cap);
strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
-/* strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card); */
if (gspca_dev->dev->product != NULL) {
strncpy(cap->card, gspca_dev->dev->product,
sizeof cap->card);
}
frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
-/* frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; */
if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
}
/* if the process slept for more than 1 second,
- * get anewer frame */
+ * get a newer frame */
frame = &gspca_dev->frame[v4l2_buf.index];
if (--n < 0)
break; /* avoid infinite loop */
if (dev_size < sizeof *gspca_dev)
dev_size = sizeof *gspca_dev;
gspca_dev = kzalloc(dev_size, GFP_KERNEL);
- if (gspca_dev == NULL) {
+ if (!gspca_dev) {
err("couldn't kzalloc gspca struct");
- return -EIO;
+ return -ENOMEM;
}
+ kref_init(&gspca_dev->kref);
gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
if (!gspca_dev->usb_buf) {
err("out of memory");
- ret = -EIO;
+ ret = -ENOMEM;
goto out;
}
gspca_dev->dev = dev;
gspca_dev->iface = interface->bInterfaceNumber;
gspca_dev->nbalt = intf->num_altsetting;
gspca_dev->sd_desc = sd_desc;
-/* gspca_dev->users = 0; (done by kzalloc) */
gspca_dev->nbufread = 2;
/* configure the subdriver and initialize the USB device */
PDEBUG(D_PROBE, "probe ok");
return 0;
out:
- kfree(gspca_dev->usb_buf);
- kfree(gspca_dev);
+ kref_put(&gspca_dev->kref, gspca_delete);
return ret;
}
EXPORT_SYMBOL(gspca_dev_probe);
{
struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
- if (!gspca_dev)
- return;
- gspca_dev->present = 0;
- mutex_lock(&gspca_dev->queue_lock);
- mutex_lock(&gspca_dev->usb_lock);
- gspca_dev->streaming = 0;
- destroy_urbs(gspca_dev);
- mutex_unlock(&gspca_dev->usb_lock);
- mutex_unlock(&gspca_dev->queue_lock);
- while (gspca_dev->users != 0) { /* wait until fully closed */
- atomic_inc(&gspca_dev->nevent);
- wake_up_interruptible(&gspca_dev->wq); /* wake processes */
- schedule();
- }
+ usb_set_intfdata(intf, NULL);
+
/* We don't want people trying to open up the device */
video_unregister_device(&gspca_dev->vdev);
-/* Free the memory */
- kfree(gspca_dev->usb_buf);
- kfree(gspca_dev);
+
+ gspca_dev->present = 0;
+ gspca_dev->streaming = 0;
+
+ kref_put(&gspca_dev->kref, gspca_delete);
+
PDEBUG(D_PROBE, "disconnect complete");
}
EXPORT_SYMBOL(gspca_disconnect);
projects / mv-sheeva.git / blobdiff