* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#define MODULE_NAME "gspca"
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define GSPCA_VERSION "2.14.0"
#include <linux/init.h>
#include <linux/fs.h>
#error "DEF_NURBS too big"
#endif
-#define DRIVER_VERSION_NUMBER "2.13.0"
-
MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
MODULE_DESCRIPTION("GSPCA USB Camera Driver");
MODULE_LICENSE("GPL");
-MODULE_VERSION(DRIVER_VERSION_NUMBER);
+MODULE_VERSION(GSPCA_VERSION);
#ifdef GSPCA_DEBUG
int gspca_debug = D_ERR | D_PROBE;
if (ret == 0) {
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0)
- err("Resubmit URB failed with error %i", ret);
+ pr_err("Resubmit URB failed with error %i\n", ret);
}
}
err = input_register_device(input_dev);
if (err) {
- err("Input device registration failed with error %i",
- err);
+ pr_err("Input device registration failed with error %i\n",
+ err);
input_dev->dev.parent = NULL;
input_free_device(input_dev);
} else {
/* check the packet status and length */
st = urb->iso_frame_desc[i].status;
if (st) {
- err("ISOC data error: [%d] len=%d, status=%d",
- i, len, st);
+ pr_err("ISOC data error: [%d] len=%d, status=%d\n",
+ i, len, st);
gspca_dev->last_packet_type = DISCARD_PACKET;
continue;
}
/* resubmit the URB */
st = usb_submit_urb(urb, GFP_ATOMIC);
if (st < 0)
- err("usb_submit_urb() ret %d", st);
+ pr_err("usb_submit_urb() ret %d\n", st);
}
/*
if (gspca_dev->cam.bulk_nurbs != 0) {
st = usb_submit_urb(urb, GFP_ATOMIC);
if (st < 0)
- err("usb_submit_urb() ret %d", st);
+ pr_err("usb_submit_urb() ret %d\n", st);
}
}
} else {
/* !! image is NULL only when last pkt is LAST or DISCARD
if (gspca_dev->image == NULL) {
- err("gspca_frame_add() image == NULL");
+ pr_err("gspca_frame_add() image == NULL\n");
return;
}
*/
}
EXPORT_SYMBOL(gspca_frame_add);
-static int gspca_is_compressed(__u32 format)
-{
- switch (format) {
- case V4L2_PIX_FMT_MJPEG:
- case V4L2_PIX_FMT_JPEG:
- case V4L2_PIX_FMT_SPCA561:
- case V4L2_PIX_FMT_PAC207:
- case V4L2_PIX_FMT_MR97310A:
- return 1;
- }
- return 0;
-}
-
static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
enum v4l2_memory memory, unsigned int count)
{
count = GSPCA_MAX_FRAMES - 1;
gspca_dev->frbuf = vmalloc_32(frsz * count);
if (!gspca_dev->frbuf) {
- err("frame alloc failed");
+ pr_err("frame alloc failed\n");
return -ENOMEM;
}
gspca_dev->capt_file = file;
return 0;
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
if (ret < 0)
- err("set alt 0 err %d", ret);
+ pr_err("set alt 0 err %d\n", ret);
return ret;
}
return NULL;
}
+/* compute the minimum bandwidth for the current transfer */
+static u32 which_bandwidth(struct gspca_dev *gspca_dev)
+{
+ u32 bandwidth;
+ int i;
+
+ i = gspca_dev->curr_mode;
+ bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
+
+ /* if the image is compressed, estimate the mean image size */
+ if (bandwidth < gspca_dev->cam.cam_mode[i].width *
+ gspca_dev->cam.cam_mode[i].height)
+ bandwidth /= 3;
+
+ /* estimate the frame rate */
+ if (gspca_dev->sd_desc->get_streamparm) {
+ struct v4l2_streamparm parm;
+
+ parm.parm.capture.timeperframe.denominator = 15;
+ gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
+ bandwidth *= parm.parm.capture.timeperframe.denominator;
+ } else {
+ bandwidth *= 15; /* 15 fps */
+ }
+
+ PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
+ return bandwidth;
+}
+
+/* endpoint table */
+#define MAX_ALT 16
+struct ep_tb_s {
+ u32 alt;
+ u32 bandwidth;
+};
+
/*
- * 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).
+ * build the table of the endpoints
+ * and compute the minimum bandwidth for the image transfer
*/
-static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
+static int build_ep_tb(struct gspca_dev *gspca_dev,
+ struct usb_interface *intf,
+ int xfer,
+ struct ep_tb_s *ep_tb)
{
- struct usb_interface *intf;
struct usb_host_endpoint *ep;
- int xfer, i, ret;
+ int i, j, nbalt, psize, found;
+ u32 bandwidth, last_bw;
- intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
- ep = NULL;
- xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
- : USB_ENDPOINT_XFER_ISOC;
- i = gspca_dev->alt; /* previous alt setting */
- if (gspca_dev->cam.reverse_alts) {
- while (++i < gspca_dev->nbalt) {
- ep = alt_xfer(&intf->altsetting[i], xfer);
- if (ep)
- break;
- }
- } else {
- while (--i >= 0) {
- ep = alt_xfer(&intf->altsetting[i], xfer);
- if (ep)
- break;
- }
- }
- if (ep == NULL) {
- err("no transfer endpoint found");
- return NULL;
- }
- PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
- i, ep->desc.bEndpointAddress);
- gspca_dev->alt = i; /* memorize the current alt setting */
- if (gspca_dev->nbalt > 1) {
- ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
- if (ret < 0) {
- err("set alt %d err %d", i, ret);
- ep = NULL;
+ nbalt = intf->num_altsetting;
+ if (nbalt > MAX_ALT)
+ nbalt = MAX_ALT; /* fixme: should warn */
+
+ /* build the endpoint table */
+ i = 0;
+ last_bw = 0;
+ for (;;) {
+ ep_tb->bandwidth = 2000 * 2000 * 120;
+ found = 0;
+ for (j = 0; j < nbalt; j++) {
+ ep = alt_xfer(&intf->altsetting[j], xfer);
+ if (ep == NULL)
+ continue;
+ psize = le16_to_cpu(ep->desc.wMaxPacketSize);
+ if (!gspca_dev->cam.bulk) /* isoc */
+ psize = (psize & 0x07ff) *
+ (1 + ((psize >> 11) & 3));
+ bandwidth = psize * ep->desc.bInterval * 1000;
+ if (gspca_dev->dev->speed == USB_SPEED_HIGH
+ || gspca_dev->dev->speed == USB_SPEED_SUPER)
+ bandwidth *= 8;
+ if (bandwidth <= last_bw)
+ continue;
+ if (bandwidth < ep_tb->bandwidth) {
+ ep_tb->bandwidth = bandwidth;
+ ep_tb->alt = j;
+ found = 1;
+ }
}
+ if (!found)
+ break;
+ PDEBUG(D_STREAM, "alt %d bandwidth %d",
+ ep_tb->alt, ep_tb->bandwidth);
+ last_bw = ep_tb->bandwidth;
+ i++;
+ ep_tb++;
+ }
+
+ /* get the requested bandwidth and start at the highest atlsetting */
+ bandwidth = which_bandwidth(gspca_dev);
+ ep_tb--;
+ while (i > 1) {
+ ep_tb--;
+ if (ep_tb->bandwidth < bandwidth)
+ break;
+ i--;
}
- return ep;
+ return i;
}
/*
for (n = 0; n < nurbs; n++) {
urb = usb_alloc_urb(npkt, GFP_KERNEL);
if (!urb) {
- err("usb_alloc_urb failed");
+ pr_err("usb_alloc_urb failed\n");
return -ENOMEM;
}
gspca_dev->urb[n] = urb;
&urb->transfer_dma);
if (urb->transfer_buffer == NULL) {
- err("usb_alloc_coherent failed");
+ pr_err("usb_alloc_coherent failed\n");
return -ENOMEM;
}
urb->dev = gspca_dev->dev;
ep->desc.bEndpointAddress);
urb->transfer_flags = URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP;
- urb->interval = ep->desc.bInterval;
+ if (gspca_dev->dev->speed == USB_SPEED_LOW)
+ urb->interval = ep->desc.bInterval;
+ else
+ urb->interval = 1 << (ep->desc.bInterval - 1);
urb->complete = isoc_irq;
urb->number_of_packets = npkt;
for (i = 0; i < npkt; i++) {
*/
static int gspca_init_transfer(struct gspca_dev *gspca_dev)
{
+ struct usb_interface *intf;
struct usb_host_endpoint *ep;
struct urb *urb;
- int n, ret;
+ struct ep_tb_s ep_tb[MAX_ALT];
+ int n, ret, xfer, alt, alt_idx;
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
gspca_dev->usb_err = 0;
- /* set the higher alternate setting and
- * loop until urb submit succeeds */
- if (gspca_dev->cam.reverse_alts)
- gspca_dev->alt = 0;
- else
- gspca_dev->alt = gspca_dev->nbalt;
-
+ /* do the specific subdriver stuff before endpoint selection */
+ intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+ gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
if (gspca_dev->sd_desc->isoc_init) {
ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
if (ret < 0)
goto unlock;
}
+ xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
+ : USB_ENDPOINT_XFER_ISOC;
- gspca_input_destroy_urb(gspca_dev);
- ep = get_ep(gspca_dev);
- if (ep == NULL) {
- ret = -EIO;
- goto out;
+ /* if the subdriver forced an altsetting, get the endpoint */
+ if (gspca_dev->alt != 0) {
+ gspca_dev->alt--; /* (previous version compatibility) */
+ ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
+ if (ep == NULL) {
+ pr_err("bad altsetting %d\n", gspca_dev->alt);
+ ret = -EIO;
+ goto out;
+ }
+ ep_tb[0].alt = gspca_dev->alt;
+ alt_idx = 1;
+ } else {
+
+ /* else, compute the minimum bandwidth
+ * and build the endpoint table */
+ alt_idx = build_ep_tb(gspca_dev, intf, xfer, ep_tb);
+ if (alt_idx <= 0) {
+ pr_err("no transfer endpoint found\n");
+ ret = -EIO;
+ goto unlock;
+ }
}
+
+ /* set the highest alternate setting and
+ * loop until urb submit succeeds */
+ gspca_input_destroy_urb(gspca_dev);
+
+ gspca_dev->alt = ep_tb[--alt_idx].alt;
+ alt = -1;
for (;;) {
+ if (alt != gspca_dev->alt) {
+ alt = gspca_dev->alt;
+ if (gspca_dev->nbalt > 1) {
+ ret = usb_set_interface(gspca_dev->dev,
+ gspca_dev->iface,
+ alt);
+ if (ret < 0) {
+ if (ret == -ENOSPC)
+ goto retry; /*fixme: ugly*/
+ pr_err("set alt %d err %d\n", alt, ret);
+ goto out;
+ }
+ }
+ }
if (!gspca_dev->cam.no_urb_create) {
- PDEBUG(D_STREAM, "init transfer alt %d",
- gspca_dev->alt);
- ret = create_urbs(gspca_dev, ep);
+ PDEBUG(D_STREAM, "init transfer alt %d", alt);
+ ret = create_urbs(gspca_dev,
+ alt_xfer(&intf->altsetting[alt], xfer));
if (ret < 0) {
destroy_urbs(gspca_dev);
goto out;
break;
}
if (ret >= 0)
- break;
+ break; /* transfer is started */
+
+ /* something when wrong
+ * stop the webcam and free the transfer resources */
gspca_stream_off(gspca_dev);
if (ret != -ENOSPC) {
- err("usb_submit_urb alt %d err %d",
- gspca_dev->alt, ret);
+ pr_err("usb_submit_urb alt %d err %d\n",
+ gspca_dev->alt, ret);
goto out;
}
/* the bandwidth is not wide enough
* negotiate or try a lower alternate setting */
+retry:
PDEBUG(D_ERR|D_STREAM,
- "bandwidth not wide enough - trying again");
+ "alt %d - bandwidth not wide enough - trying again",
+ alt);
msleep(20); /* wait for kill complete */
if (gspca_dev->sd_desc->isoc_nego) {
ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
if (ret < 0)
goto out;
} else {
- ep = get_ep(gspca_dev);
- if (ep == NULL) {
+ if (alt_idx <= 0) {
+ pr_err("no transfer endpoint found\n");
ret = -EIO;
goto out;
}
+ gspca_dev->alt = ep_tb[--alt_idx].alt;
}
}
out:
return -EINVAL; /* no more format */
fmtdesc->pixelformat = fmt_tb[index];
- if (gspca_is_compressed(fmt_tb[index]))
+ if (gspca_dev->cam.cam_mode[i].sizeimage <
+ gspca_dev->cam.cam_mode[i].width *
+ gspca_dev->cam.cam_mode[i].height)
fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
struct usb_device *dev = interface_to_usbdev(intf);
int ret;
- PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
+ pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
+ sd_desc->name, id->idVendor, id->idProduct);
/* create the device */
if (dev_size < sizeof *gspca_dev)
dev_size = sizeof *gspca_dev;
gspca_dev = kzalloc(dev_size, GFP_KERNEL);
if (!gspca_dev) {
- err("couldn't kzalloc gspca struct");
+ pr_err("couldn't kzalloc gspca struct\n");
return -ENOMEM;
}
gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
if (!gspca_dev->usb_buf) {
- err("out of memory");
+ pr_err("out of memory\n");
ret = -ENOMEM;
goto out;
}
VFL_TYPE_GRABBER,
-1);
if (ret < 0) {
- err("video_register_device err %d", ret);
+ pr_err("video_register_device err %d\n", ret);
goto out;
}
/* we don't handle multi-config cameras */
if (dev->descriptor.bNumConfigurations != 1) {
- err("%04x:%04x too many config",
- id->idVendor, id->idProduct);
+ pr_err("%04x:%04x too many config\n",
+ id->idVendor, id->idProduct);
return -ENODEV;
}
/* -- module insert / remove -- */
static int __init gspca_init(void)
{
- info("v" DRIVER_VERSION_NUMBER " registered");
+ pr_info("v" GSPCA_VERSION " registered\n");
return 0;
}
static void __exit gspca_exit(void)
git.openpandora.org / pandora-kernel.git / blobdiff