V4L/DVB (8152): Initial release of gspca with only one driver.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
new file mode 100644
index 0000000..4fe082f
--- /dev/null
+++ b/drivers/media/video/gspca/gspca.c
@@ -0,0 +1,1750 @@
+/*
+ * Main USB camera driver
+ *
+ * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define MODULE_NAME "gspca"
+
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pagemap.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+#include <linux/jiffies.h>
+
+#include "gspca.h"
+
+MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
+MODULE_DESCRIPTION("GSPCA USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 26)
+static const char version[] = "0.0.26";
+
+static int video_nr = -1;
+
+static int comp_fac = 30; /* Buffer size ratio when compressed in % */
+
+#ifdef GSPCA_DEBUG
+int gspca_debug = D_ERR | D_PROBE;
+EXPORT_SYMBOL(gspca_debug);
+
+static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
+{
+ if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
+ PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
+ txt,
+ pixfmt & 0xff,
+ (pixfmt >> 8) & 0xff,
+ (pixfmt >> 16) & 0xff,
+ pixfmt >> 24,
+ w, h);
+ } else {
+ PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
+ txt,
+ pixfmt,
+ w, h);
+ }
+}
+#else
+#define PDEBUG_MODE(txt, pixfmt, w, h)
+#endif
+
+/*
+ * VMA operations.
+ */
+static void gspca_vm_open(struct vm_area_struct *vma)
+{
+ struct gspca_frame *frame = vma->vm_private_data;
+
+ frame->vma_use_count++;
+ frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
+}
+
+static void gspca_vm_close(struct vm_area_struct *vma)
+{
+ struct gspca_frame *frame = vma->vm_private_data;
+
+ if (--frame->vma_use_count <= 0)
+ frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
+}
+
+static struct vm_operations_struct gspca_vm_ops = {
+ .open = gspca_vm_open,
+ .close = gspca_vm_close,
+};
+
+/*
+ * ISOC message interrupt from the USB device
+ *
+ * Analyse each packet and call the subdriver for doing the copy
+ * to the frame buffer.
+ */
+static void isoc_irq(struct urb *urb)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ struct gspca_frame *frame;
+ unsigned char *data; /* address of data in the iso message */
+ int i, j, len, st;
+ cam_pkt_op pkt_scan;
+
+ PDEBUG(D_PACK, "isoc irq");
+ if (!gspca_dev->streaming)
+ return;
+ pkt_scan = gspca_dev->sd_desc->pkt_scan;
+ 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
+ & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
+ != V4L2_BUF_FLAG_QUEUED) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ break;
+ }
+
+ /* check the packet status and length */
+ len = urb->iso_frame_desc[i].actual_length;
+ st = urb->iso_frame_desc[i].status;
+ if (st) {
+ PDEBUG(D_ERR, "ISOC data error: [%d] len=%d, status=%d",
+ i, len, st);
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+ if (len == 0)
+ continue;
+
+ /* 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 = (unsigned char *) urb->transfer_buffer
+ + urb->iso_frame_desc[i].offset;
+ pkt_scan(gspca_dev, frame, data, len);
+ }
+
+ /* resubmit the URB */
+ urb->status = 0;
+ st = usb_submit_urb(urb, GFP_ATOMIC);
+ if (st < 0)
+ PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
+}
+
+/*
+ * add data to the current frame
+ *
+ * This function is called by the subdrivers at interrupt level.
+ * To build a frame, these ones must add
+ * - one FIRST_PACKET
+ * - 0 or many INTER_PACKETs
+ * - one LAST_PACKET
+ * DISCARD_PACKET invalidates the whole frame.
+ * On LAST_PACKET, a new frame is returned.
+ */
+struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
+ int packet_type,
+ struct gspca_frame *frame,
+ unsigned char *data,
+ int len)
+{
+ int i, j;
+
+ PDEBUG(D_PACK, "add t:%d l:%d %02x %02x %02x %02x...",
+ packet_type, len, data[0], data[1], data[2], data[3]);
+
+ /* when start of a new frame, if the current frame buffer
+ * is not queued, discard the whole frame */
+ if (packet_type == FIRST_PACKET) {
+ if ((frame->v4l2_buf.flags
+ & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
+ != V4L2_BUF_FLAG_QUEUED) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ return frame;
+ }
+ frame->data_end = frame->data;
+ jiffies_to_timeval(get_jiffies_64(),
+ &frame->v4l2_buf.timestamp);
+ frame->v4l2_buf.sequence = ++gspca_dev->sequence;
+ } else if (gspca_dev->last_packet_type == DISCARD_PACKET)
+ return frame;
+
+ /* append the packet in the frame buffer */
+ if (len > 0) {
+ if (frame->data_end - frame->data + len
+ > frame->v4l2_buf.length) {
+ PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
+ frame->data_end - frame->data + len,
+ frame->v4l2_buf.length);
+ packet_type = DISCARD_PACKET;
+ } else {
+ if (frame->v4l2_buf.memory != V4L2_MEMORY_USERPTR)
+ memcpy(frame->data_end, data, len);
+ else
+ copy_to_user(frame->data_end, data, len);
+ frame->data_end += len;
+ }
+ }
+ gspca_dev->last_packet_type = packet_type;
+
+ /* if last packet, wake 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;
+ frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
+ atomic_inc(&gspca_dev->nevent);
+ wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
+ i = gspca_dev->fr_i;
+ i = (i + 1) % gspca_dev->nframes;
+ PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
+ frame->v4l2_buf.bytesused,
+ gspca_dev->fr_q,
+ i,
+ gspca_dev->fr_o);
+ j = gspca_dev->fr_queue[i];
+ frame = &gspca_dev->frame[j];
+ gspca_dev->fr_i = i;
+ }
+ return frame;
+}
+EXPORT_SYMBOL(gspca_frame_add);
+
+static int gspca_is_compressed(__u32 format)
+{
+ switch (format) {
+ case V4L2_PIX_FMT_MJPEG:
+ case V4L2_PIX_FMT_JPEG:
+ return 1;
+ }
+ return 0;
+}
+
+static void *rvmalloc(unsigned long size)
+{
+ void *mem;
+ unsigned long adr;
+
+ size = PAGE_ALIGN(size);
+ mem = vmalloc_32(size);
+ if (mem != 0) {
+ memset(mem, 0, size);
+ adr = (unsigned long) mem;
+ while ((long) size > 0) {
+ SetPageReserved(vmalloc_to_page((void *) adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ }
+ return mem;
+}
+
+static void rvfree(void *mem, unsigned long size)
+{
+ unsigned long adr;
+
+ if (!mem)
+ return;
+ adr = (unsigned long) mem;
+ while ((long) size > 0) {
+ ClearPageReserved(vmalloc_to_page((void *) adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ vfree(mem);
+}
+
+static int frame_alloc(struct gspca_dev *gspca_dev,
+ unsigned int count,
+ unsigned int frsz,
+ enum v4l2_memory memory)
+{
+ int i, ret = 0;
+
+ PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
+ if (gspca_dev->nframes != 0) {
+ PDEBUG(D_ERR|D_STREAM, "alloc frame already done");
+ return -EBUSY;
+ }
+ if (count > GSPCA_MAX_FRAMES)
+ count = GSPCA_MAX_FRAMES;
+ /* if compressed, reduce the buffer size */
+ if (gspca_is_compressed(gspca_dev->pixfmt))
+ frsz = (frsz * comp_fac) / 100;
+ frsz = PAGE_ALIGN(frsz);
+ PDEBUG(D_STREAM, "new fr_sz: %d", frsz);
+ gspca_dev->frsz = frsz;
+ if (memory == V4L2_MEMORY_MMAP) {
+ gspca_dev->frbuf = rvmalloc(frsz * count);
+ if (!gspca_dev->frbuf) {
+ err("frame alloc failed");
+ return -ENOMEM;
+ }
+ }
+ gspca_dev->nframes = count;
+ for (i = 0; i < count; i++) {
+ gspca_dev->frame[i].v4l2_buf.index = i;
+ gspca_dev->frame[i].v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ gspca_dev->frame[i].v4l2_buf.flags = 0;
+ gspca_dev->frame[i].v4l2_buf.field = V4L2_FIELD_NONE;
+ gspca_dev->frame[i].v4l2_buf.length = frsz;
+ gspca_dev->frame[i].v4l2_buf.memory = memory;
+ if (memory == V4L2_MEMORY_MMAP) {
+ gspca_dev->frame[i].data
+ = gspca_dev->frame[i].data_end
+ = gspca_dev->frbuf + i * frsz;
+ gspca_dev->frame[i].v4l2_buf.m.offset = i * frsz;
+ }
+ gspca_dev->frame[i].v4l2_buf.flags = 0; /* buf in app space */
+ }
+ gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ gspca_dev->sequence = 0;
+ atomic_set(&gspca_dev->nevent, 0);
+ return ret;
+}
+
+static void frame_free(struct gspca_dev *gspca_dev)
+{
+ int i;
+
+ PDEBUG(D_STREAM, "frame free");
+ if (gspca_dev->frbuf != 0) {
+ rvfree(gspca_dev->frbuf,
+ gspca_dev->nframes * gspca_dev->frsz);
+ gspca_dev->frbuf = NULL;
+ for (i = 0; i < gspca_dev->nframes; i++)
+ gspca_dev->frame[i].data = NULL;
+ }
+ gspca_dev->nframes = 0;
+}
+
+static int gspca_kill_transfer(struct gspca_dev *gspca_dev)
+{
+ struct urb *urb;
+ unsigned int i;
+
+ PDEBUG(D_STREAM, "kill transfer");
+ gspca_dev->streaming = 0;
+ for (i = 0; i < NURBS; ++i) {
+ urb = gspca_dev->pktbuf[i].urb;
+ if (urb == NULL)
+ continue;
+
+ gspca_dev->pktbuf[i].urb = NULL;
+ usb_kill_urb(urb);
+
+ /* urb->transfer_buffer_length is not touched by USB core,
+ * so we can use it here as the buffer length */
+ if (gspca_dev->pktbuf[i].data) {
+ usb_buffer_free(gspca_dev->dev,
+ urb->transfer_buffer_length,
+ gspca_dev->pktbuf[i].data,
+ urb->transfer_dma);
+ gspca_dev->pktbuf[i].data = NULL;
+ }
+ usb_free_urb(urb);
+ }
+ return 0;
+}
+
+/*
+ * search an input isochronous endpoint in an alternate setting
+ */
+static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt,
+ __u8 epaddr)
+{
+ 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 == USB_ENDPOINT_XFER_ISOC)
+ return ep;
+ break;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * search an input isochronous 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).
+ */
+struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev)
+{
+ struct usb_interface *intf;
+ struct usb_host_endpoint *ep;
+ int i, ret;
+
+ intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+ i = gspca_dev->alt; /* previous alt setting */
+ while (--i > 0) { /* alt 0 is unusable */
+ ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr);
+ if (ep)
+ break;
+ }
+ if (i <= 0) {
+ err("no ISOC endpoint found");
+ return NULL;
+ }
+ PDEBUG(D_STREAM, "use ISOC 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;
+ }
+ gspca_dev->alt = i;
+ return ep;
+}
+
+/*
+ * create the isochronous URBs
+ */
+static int create_urbs(struct gspca_dev *gspca_dev,
+ struct usb_host_endpoint *ep)
+{
+ struct urb *urb;
+ int n, i, psize, npkt, bsize;
+
+ /* calculate the packet size and the number of packets */
+ /* the URB buffer size must be a power of 2 */
+ 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;
+ for (n = ISO_MAX_SIZE; n > 0; n >>= 1) {
+ if (n & bsize) /* !! assume ISO_MAX_SIZE is a power of 2 */
+ break;
+ }
+ if (n != 0) {
+ npkt = n / psize;
+ bsize = psize * npkt;
+ }
+ PDEBUG(D_STREAM,
+ "isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize);
+ for (n = 0; n < NURBS; n++) {
+ urb = usb_alloc_urb(npkt, GFP_KERNEL);
+ if (!urb) {
+ err("usb_alloc_urb failed");
+ return -ENOMEM;
+ }
+ gspca_dev->pktbuf[n].data = usb_buffer_alloc(gspca_dev->dev,
+ bsize,
+ GFP_KERNEL,
+ &urb->transfer_dma);
+
+ if (gspca_dev->pktbuf[n].data == NULL) {
+ usb_free_urb(urb);
+ gspca_kill_transfer(gspca_dev);
+ err("usb_buffer_urb failed");
+ return -ENOMEM;
+ }
+ gspca_dev->pktbuf[n].urb = 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->transfer_buffer = gspca_dev->pktbuf[n].data;
+ 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;
+ }
+ }
+ return 0;
+}
+
+/*
+ * start the USB transfer
+ */
+static int gspca_init_transfer(struct gspca_dev *gspca_dev)
+{
+ struct usb_interface *intf;
+ struct usb_host_endpoint *ep;
+ int n, ret;
+
+ ret = mutex_lock_interruptible(&gspca_dev->usb_lock);
+ if (ret < 0)
+ return ret;
+
+ /* set the max alternate setting and loop until urb submit succeeds */
+ intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+ gspca_dev->alt = intf->num_altsetting;
+ for (;;) {
+ PDEBUG(D_STREAM, "init transfer nbalt %d", gspca_dev->alt);
+ ep = get_isoc_ep(gspca_dev);
+ if (ep == NULL) {
+ ret = -EIO;
+ goto out;
+ }
+ ret = create_urbs(gspca_dev, ep);
+ if (ret < 0)
+ goto out;
+
+ /* start the cam */
+ gspca_dev->sd_desc->start(gspca_dev);
+ gspca_dev->streaming = 1;
+ atomic_set(&gspca_dev->nevent, 0);
+
+ /* submit the URBs */
+ for (n = 0; n < NURBS; n++) {
+ ret = usb_submit_urb(gspca_dev->pktbuf[n].urb,
+ GFP_KERNEL);
+ if (ret < 0) {
+ PDEBUG(D_ERR|D_STREAM,
+ "usb_submit_urb [%d] err %d", n, ret);
+ gspca_kill_transfer(gspca_dev);
+ if (ret == -ENOSPC)
+ break; /* try the previous alt */
+ goto out;
+ }
+ }
+ if (ret >= 0)
+ break;
+ }
+out:
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
+}
+
+static int gspca_set_alt0(struct gspca_dev *gspca_dev)
+{
+ int ret;
+
+ ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
+ if (ret < 0)
+ PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret);
+ return ret;
+}
+
+static void gspca_stream_off(struct gspca_dev *gspca_dev)
+{
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ gspca_dev->streaming = 0;
+ if (gspca_dev->present) {
+ gspca_dev->sd_desc->stopN(gspca_dev);
+ gspca_kill_transfer(gspca_dev);
+ gspca_set_alt0(gspca_dev);
+ gspca_dev->sd_desc->stop0(gspca_dev);
+ PDEBUG(D_STREAM, "stream off OK");
+ } else {
+ gspca_kill_transfer(gspca_dev);
+ atomic_inc(&gspca_dev->nevent);
+ wake_up_interruptible(&gspca_dev->wq);
+ PDEBUG(D_ERR|D_STREAM, "stream off no device ??");
+ }
+ mutex_unlock(&gspca_dev->usb_lock);
+}
+
+static int gspca_set_default_mode(struct gspca_dev *gspca_dev)
+{
+ int i;
+
+ i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
+ gspca_dev->curr_mode = i;
+ gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
+ gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
+ gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixfmt;
+ return 0;
+}
+
+static int wxh_to_mode(struct gspca_dev *gspca_dev,
+ int width, int height)
+{
+ int i;
+
+ for (i = gspca_dev->cam.nmodes - 1; --i >= 0; ) {
+ if (width > gspca_dev->cam.cam_mode[i].width)
+ break;
+ }
+ i++;
+ while (i < gspca_dev->cam.nmodes - 1
+ && width == gspca_dev->cam.cam_mode[i + 1].width
+ && height < gspca_dev->cam.cam_mode[i + 1].height)
+ i++;
+ return i;
+}
+
+static __u32 get_v4l2_depth(__u32 pixfmt)
+{
+ switch (pixfmt) {
+ case V4L2_PIX_FMT_BGR32:
+ case V4L2_PIX_FMT_RGB32:
+ return 32;
+ case V4L2_PIX_FMT_RGB24:
+ case V4L2_PIX_FMT_BGR24:
+ return 24;
+ case V4L2_PIX_FMT_RGB565:
+ case V4L2_PIX_FMT_YUYV: /* packed 4.2.2 */
+ case V4L2_PIX_FMT_YYUV:
+ return 16;
+ case V4L2_PIX_FMT_YUV420: /* planar 4.2.0 */
+ return 12;
+ case V4L2_PIX_FMT_MJPEG:
+ case V4L2_PIX_FMT_JPEG:
+ case V4L2_PIX_FMT_SBGGR8: /* Bayer */
+ return 8;
+ }
+ PDEBUG(D_ERR|D_CONF, "Unknown pixel format %c%c%c%c",
+ pixfmt & 0xff,
+ (pixfmt >> 8) & 0xff,
+ (pixfmt >> 16) & 0xff,
+ pixfmt >> 24);
+ return -EINVAL;
+}
+
+/*
+ * search a mode with the right pixel format
+ */
+static int gspca_get_mode(struct gspca_dev *gspca_dev,
+ int mode,
+ int pixfmt)
+{
+ int modeU, modeD;
+
+ modeU = modeD = mode;
+ while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
+ if (--modeD >= 0) {
+ if (gspca_dev->cam.cam_mode[modeD].pixfmt == pixfmt)
+ return modeD;
+ }
+ if (++modeU < gspca_dev->cam.nmodes) {
+ if (gspca_dev->cam.cam_mode[modeU].pixfmt == pixfmt)
+ return modeU;
+ }
+ }
+ return -EINVAL;
+}
+
+static int vidioc_enum_fmt_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmtdesc)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int i, j, index;
+ __u32 fmt_tb[8];
+
+ PDEBUG(D_CONF, "enum fmt cap");
+
+ /* give an index to each format */
+ index = 0;
+ j = 0;
+ for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
+ fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixfmt;
+ j = 0;
+ for (;;) {
+ if (fmt_tb[j] == fmt_tb[index])
+ break;
+ j++;
+ }
+ if (j == index) {
+ if (fmtdesc->index == index)
+ break; /* new format */
+ index++;
+ if (index >= sizeof fmt_tb / sizeof fmt_tb[0])
+ return -EINVAL;
+ }
+ }
+ if (i < 0)
+ return -EINVAL; /* no more format */
+
+ fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ fmtdesc->pixelformat = fmt_tb[index];
+ if (gspca_is_compressed(fmt_tb[index]))
+ fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
+ fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
+ fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
+ fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
+ fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
+ fmtdesc->description[4] = '\0';
+ return 0;
+}
+
+static int gspca_get_buff_size(struct gspca_dev *gspca_dev)
+{
+ unsigned int size;
+
+ size = gspca_dev->width * gspca_dev->height
+ * get_v4l2_depth(gspca_dev->pixfmt) / 8;
+ if (!size)
+ return -ENOMEM;
+ return size;
+}
+
+static int vidioc_g_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct gspca_dev *gspca_dev = priv;
+
+ fmt->fmt.pix.width = gspca_dev->width;
+ fmt->fmt.pix.height = gspca_dev->height;
+ fmt->fmt.pix.pixelformat = gspca_dev->pixfmt;
+#ifdef GSPCA_DEBUG
+ if (gspca_debug & D_CONF) {
+ PDEBUG_MODE("get fmt cap",
+ fmt->fmt.pix.pixelformat,
+ fmt->fmt.pix.width,
+ fmt->fmt.pix.height);
+ }
+#endif
+ fmt->fmt.pix.field = V4L2_FIELD_NONE;
+ fmt->fmt.pix.bytesperline = get_v4l2_depth(fmt->fmt.pix.pixelformat)
+ * fmt->fmt.pix.width / 8;
+ fmt->fmt.pix.sizeimage = fmt->fmt.pix.bytesperline
+ * fmt->fmt.pix.height;
+/* (should be in the subdriver) */
+ fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->fmt.pix.priv = 0;
+ return 0;
+}
+
+static int try_fmt_cap(struct file *file,
+ void *priv,
+ struct v4l2_format *fmt)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int w, h, mode, mode2, frsz;
+
+ w = (int) fmt->fmt.pix.width;
+ h = (int) fmt->fmt.pix.height;
+#ifdef GSPCA_DEBUG
+ if (gspca_debug & D_CONF)
+ PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
+#endif
+ /* search the closest mode for width and height */
+ mode = wxh_to_mode(gspca_dev, w, h);
+
+ /* OK if right palette */
+ if (gspca_dev->cam.cam_mode[mode].pixfmt != fmt->fmt.pix.pixelformat) {
+
+ /* else, search the closest mode with the same pixel format */
+ mode2 = gspca_get_mode(gspca_dev, mode,
+ fmt->fmt.pix.pixelformat);
+ if (mode2 >= 0)
+ mode = mode2;
+ else {
+
+ /* no chance, return this mode */
+ fmt->fmt.pix.pixelformat
+ = gspca_dev->cam.cam_mode[mode].pixfmt;
+#ifdef GSPCA_DEBUG
+ if (gspca_debug & D_CONF) {
+ PDEBUG_MODE("new format",
+ fmt->fmt.pix.pixelformat,
+ gspca_dev->cam.cam_mode[mode].width,
+ gspca_dev->cam.cam_mode[mode].height);
+ }
+#endif
+ }
+ }
+ fmt->fmt.pix.width = gspca_dev->cam.cam_mode[mode].width;
+ fmt->fmt.pix.height = gspca_dev->cam.cam_mode[mode].height;
+ fmt->fmt.pix.bytesperline = get_v4l2_depth(fmt->fmt.pix.pixelformat)
+ * fmt->fmt.pix.width / 8;
+ frsz = fmt->fmt.pix.bytesperline * fmt->fmt.pix.height;
+ if (gspca_is_compressed(fmt->fmt.pix.pixelformat))
+ frsz = (frsz * comp_fac) / 100;
+ fmt->fmt.pix.sizeimage = frsz;
+ return mode; /* used when s_fmt */
+}
+
+static int vidioc_try_fmt_cap(struct file *file,
+ void *priv,
+ struct v4l2_format *fmt)
+{
+ int ret;
+
+/* mutex_lock_interruptible(&gspca_dev->queue_lock); */
+ ret = try_fmt_cap(file, priv, fmt);
+/* mutex_unlock(&gspca_dev->queue_lock); */
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int vidioc_s_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int ret, was_streaming;
+
+#ifdef GSPCA_DEBUG
+ if (gspca_debug & D_CONF) {
+ PDEBUG_MODE("set fmt cap",
+ fmt->fmt.pix.pixelformat,
+ fmt->fmt.pix.width, fmt->fmt.pix.height);
+ }
+#endif
+ mutex_lock_interruptible(&gspca_dev->queue_lock);
+ ret = try_fmt_cap(file, priv, fmt);
+ if (ret < 0)
+ goto out;
+
+ if (ret == gspca_dev->curr_mode)
+ goto out; /* same mode */
+ was_streaming = gspca_dev->streaming;
+ if (was_streaming != 0)
+ gspca_stream_off(gspca_dev);
+ gspca_dev->width = (int) fmt->fmt.pix.width;
+ gspca_dev->height = (int) fmt->fmt.pix.height;
+ gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
+ gspca_dev->curr_mode = ret;
+ if (was_streaming)
+ ret = gspca_init_transfer(gspca_dev);
+out:
+ mutex_unlock(&gspca_dev->queue_lock);
+ return ret;
+}
+
+static int dev_open(struct inode *inode, struct file *file)
+{
+ struct gspca_dev *gspca_dev;
+ int ret;
+
+ PDEBUG(D_STREAM, "opening");
+ gspca_dev = (struct gspca_dev *) video_devdata(file);
+ ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+ if (ret < 0)
+ return ret;
+ if (!gspca_dev->present) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ /* if not done yet, initialize the sensor */
+ if (gspca_dev->users == 0) {
+ ret = mutex_lock_interruptible(&gspca_dev->usb_lock);
+ if (ret < 0)
+ goto out;
+ ret = gspca_dev->sd_desc->open(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+ if (ret != 0) {
+ PDEBUG(D_ERR|D_CONF, "init device failed %d", ret);
+ goto out;
+ }
+ } else if (gspca_dev->users > 8) { /* (arbitrary value) */
+ ret = -EBUSY;
+ goto out;
+ }
+ gspca_dev->users++;
+ file->private_data = gspca_dev;
+#ifdef GSPCA_DEBUG
+ /* activate the v4l2 debug */
+ if (gspca_debug & D_CONF)
+ gspca_dev->vdev.debug |= 3;
+ else
+ gspca_dev->vdev.debug &= ~3;
+#endif
+out:
+ mutex_unlock(&gspca_dev->queue_lock);
+ if (ret != 0)
+ PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
+ else
+ PDEBUG(D_STREAM, "open OK");
+ return ret;
+}
+
+static int dev_close(struct inode *inode, struct file *file)
+{
+ struct gspca_dev *gspca_dev = file->private_data;
+
+ PDEBUG(D_STREAM, "closing");
+ if (gspca_dev->streaming) {
+ mutex_lock_interruptible(&gspca_dev->queue_lock);
+ gspca_stream_off(gspca_dev);
+ mutex_unlock(&gspca_dev->queue_lock);
+ }
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ gspca_dev->sd_desc->close(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+ atomic_inc(&gspca_dev->nevent);
+ wake_up_interruptible(&gspca_dev->wq); /* wake blocked processes */
+ schedule();
+ mutex_lock_interruptible(&gspca_dev->queue_lock);
+ frame_free(gspca_dev);
+ file->private_data = NULL;
+ gspca_dev->users--;
+ mutex_unlock(&gspca_dev->queue_lock);
+ PDEBUG(D_STREAM, "closed");
+ return 0;
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct gspca_dev *gspca_dev = priv;
+
+ PDEBUG(D_CONF, "querycap");
+ 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);
+ strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name,
+ sizeof cap->bus_info);
+ cap->version = DRIVER_VERSION_NUMBER;
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
+ | V4L2_CAP_STREAMING
+ | V4L2_CAP_READWRITE;
+ return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *q_ctrl)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int i;
+
+ PDEBUG(D_CONF, "queryctrl");
+ for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
+ if (q_ctrl->id == gspca_dev->sd_desc->ctrls[i].qctrl.id) {
+ memcpy(q_ctrl,
+ &gspca_dev->sd_desc->ctrls[i].qctrl,
+ sizeof *q_ctrl);
+ return 0;
+ }
+ }
+ if (q_ctrl->id >= V4L2_CID_BASE
+ && q_ctrl->id <= V4L2_CID_LASTP1) {
+ q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct gspca_dev *gspca_dev = priv;
+ struct ctrl *ctrls;
+ int i, ret;
+
+ PDEBUG(D_CONF, "set ctrl");
+ for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
+ i < gspca_dev->sd_desc->nctrls;
+ i++, ctrls++) {
+ if (ctrl->id != ctrls->qctrl.id)
+ continue;
+ if (ctrl->value < ctrls->qctrl.minimum
+ && ctrl->value > ctrls->qctrl.maximum)
+ return -ERANGE;
+ PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ ret = ctrls->set(gspca_dev, ctrl->value);
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct gspca_dev *gspca_dev = priv;
+
+ struct ctrl *ctrls;
+ int i, ret;
+
+ for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
+ i < gspca_dev->sd_desc->nctrls;
+ i++, ctrls++) {
+ if (ctrl->id != ctrls->qctrl.id)
+ continue;
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ ret = ctrls->get(gspca_dev, &ctrl->value);
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_querymenu(struct file *file, void *priv,
+ struct v4l2_querymenu *qmenu)
+{
+ struct gspca_dev *gspca_dev = priv;
+
+ if (!gspca_dev->sd_desc->querymenu)
+ return -EINVAL;
+ return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
+}
+
+static int vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *input)
+{
+ struct gspca_dev *gspca_dev = priv;
+
+ if (input->index != 0)
+ return -EINVAL;
+ memset(input, 0, sizeof *input);
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ strncpy(input->name, gspca_dev->sd_desc->name,
+ sizeof input->name);
+ return 0;
+}
+
+static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+ if (i > 0)
+ return -EINVAL;
+ return (0);
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *rb)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int frsz, ret;
+
+ PDEBUG(D_STREAM, "reqbufs %d", rb->count);
+ if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (rb->memory != V4L2_MEMORY_MMAP
+ && rb->memory != V4L2_MEMORY_USERPTR)
+ return -EINVAL;
+ if (rb->count == 0)
+ return -EINVAL;
+ frsz = gspca_get_buff_size(gspca_dev);
+ if (frsz < 0)
+ return frsz;
+ ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+ if (ret < 0)
+ return ret;
+ ret = frame_alloc(gspca_dev,
+ rb->count,
+ (unsigned int) frsz,
+ rb->memory);
+ if (ret == 0)
+ rb->count = gspca_dev->nframes;
+ mutex_unlock(&gspca_dev->queue_lock);
+ PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
+ return ret;
+}
+
+static int vidioc_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *v4l2_buf)
+{
+ struct gspca_dev *gspca_dev = priv;
+ struct gspca_frame *frame;
+
+ PDEBUG(D_STREAM, "querybuf");
+ if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+ || v4l2_buf->index < 0
+ || v4l2_buf->index >= gspca_dev->nframes)
+ return -EINVAL;
+
+ frame = &gspca_dev->frame[v4l2_buf->index];
+ memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
+ return 0;
+}
+
+static int vidioc_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type buf_type)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int ret;
+
+ PDEBUG(D_STREAM, "stream on");
+ if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+ if (ret < 0)
+ return ret;
+ if (!gspca_dev->present) {
+ ret = -ENODEV;
+ goto out;
+ }
+ if (gspca_dev->nframes == 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ if (!gspca_dev->streaming) {
+ ret = gspca_init_transfer(gspca_dev);
+ if (ret < 0)
+ goto out;
+ }
+#ifdef GSPCA_DEBUG
+ if (gspca_debug & D_STREAM) {
+ PDEBUG_MODE("stream on OK",
+ gspca_dev->pixfmt,
+ gspca_dev->width,
+ gspca_dev->height);
+ }
+#endif
+out:
+ mutex_unlock(&gspca_dev->queue_lock);
+ return ret;
+}
+
+static int vidioc_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type buf_type)
+{
+ struct gspca_dev *gspca_dev = priv;
+
+ PDEBUG(D_STREAM, "stream off");
+ if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (gspca_dev->streaming) {
+ mutex_lock_interruptible(&gspca_dev->queue_lock);
+ gspca_stream_off(gspca_dev);
+ mutex_unlock(&gspca_dev->queue_lock);
+ }
+ return 0;
+}
+
+static int vidioc_g_jpegcomp(struct file *file, void *priv,
+ struct v4l2_jpegcompression *jpegcomp)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int ret;
+
+ if (!gspca_dev->sd_desc->get_jcomp)
+ return -EINVAL;
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
+}
+
+static int vidioc_s_jpegcomp(struct file *file, void *priv,
+ struct v4l2_jpegcompression *jpegcomp)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int ret;
+
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ if (!gspca_dev->sd_desc->set_jcomp)
+ return -EINVAL;
+ ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
+}
+
+static int vidioc_g_parm(struct file *filp, void *priv,
+ struct v4l2_streamparm *parm)
+{
+ 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;
+ return 0;
+}
+
+static int vidioc_s_parm(struct file *filp, void *priv,
+ struct v4l2_streamparm *parm)
+{
+ struct gspca_dev *gspca_dev = priv;
+ int n;
+
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ n = parm->parm.capture.readbuffers;
+ if (n == 0 || n > GSPCA_MAX_FRAMES)
+ parm->parm.capture.readbuffers = gspca_dev->nbufread;
+ else
+ gspca_dev->nbufread = n;
+ mutex_unlock(&gspca_dev->usb_lock);
+ return 0;
+}
+
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+static int vidiocgmbuf(struct file *file, void *priv,
+ struct video_mbuf *mbuf)
+{
+ struct gspca_dev *gspca_dev = file->private_data;
+ int i;
+
+ PDEBUG(D_STREAM, "cgmbuf");
+ if (gspca_dev->nframes == 0) {
+ struct v4l2_requestbuffers rb;
+ int ret;
+
+ memset(&rb, 0, sizeof rb);
+ rb.count = 4;
+ rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ rb.memory = V4L2_MEMORY_MMAP;
+ ret = vidioc_reqbufs(file, priv, &rb);
+ if (ret != 0)
+ return ret;
+ }
+ mbuf->frames = gspca_dev->nframes;
+ mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
+ for (i = 0; i < mbuf->frames; i++)
+ mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
+ return 0;
+}
+#endif
+
+static int dev_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct gspca_dev *gspca_dev = file->private_data;
+ struct gspca_frame *frame = 0;
+ struct page *page;
+ unsigned long addr, start, size;
+ int i, ret;
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+ int compat = 0;
+#endif
+
+ start = vma->vm_start;
+ size = vma->vm_end - vma->vm_start;
+ PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
+
+ ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+ if (ret < 0)
+ return ret;
+/* sanity check disconnect, in use, no memory available */
+ if (!gspca_dev->present) {
+ ret = -ENODEV;
+ goto done;
+ }
+
+ for (i = 0; i < gspca_dev->nframes; ++i) {
+ if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
+ PDEBUG(D_STREAM, "mmap bad memory type");
+ break;
+ }
+ if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
+ == vma->vm_pgoff) {
+ frame = &gspca_dev->frame[i];
+ break;
+ }
+ }
+ if (frame == 0) {
+ PDEBUG(D_STREAM, "mmap no frame buffer found");
+ ret = -EINVAL;
+ goto done;
+ }
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+ if (i == 0 && size == frame->v4l2_buf.length * gspca_dev->nframes)
+ compat = 1;
+ else
+#endif
+ if (size != frame->v4l2_buf.length) {
+ PDEBUG(D_STREAM, "mmap bad size");
+ ret = -EINVAL;
+ goto done;
+ }
+
+ /*
+ * - VM_IO marks the area as being a mmaped region for I/O to a
+ * device. It also prevents the region from being core dumped.
+ */
+ vma->vm_flags |= VM_IO;
+
+ addr = (unsigned long) frame->data;
+ while (size > 0) {
+ page = vmalloc_to_page((void *) addr);
+ ret = vm_insert_page(vma, start, page);
+ if (ret < 0)
+ goto done;
+ start += PAGE_SIZE;
+ addr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ vma->vm_ops = &gspca_vm_ops;
+ vma->vm_private_data = frame;
+ gspca_vm_open(vma);
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+ if (compat) {
+/*fixme: ugly*/
+ for (i = 1; i < gspca_dev->nframes; ++i)
+ gspca_dev->frame[i].v4l2_buf.flags |=
+ V4L2_BUF_FLAG_MAPPED;
+ }
+#endif
+done:
+ mutex_unlock(&gspca_dev->queue_lock);
+ return ret;
+}
+
+static unsigned int dev_poll(struct file *file, poll_table * wait)
+{
+ struct gspca_dev *gspca_dev = file->private_data;
+ int i, ret;
+
+ PDEBUG(D_FRAM, "poll");
+
+ poll_wait(file, &gspca_dev->wq, wait);
+
+ if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
+ return POLLERR;
+ if (gspca_dev->dev == 0
+ || !gspca_dev->streaming) /* if not streaming */
+ ret = POLLERR;
+ else {
+ i = gspca_dev->fr_o;
+ i = gspca_dev->fr_queue[i];
+ if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
+ ret = POLLIN | POLLRDNORM; /* something to read */
+ else
+ ret = 0;
+ }
+ mutex_unlock(&gspca_dev->queue_lock);
+ return ret;
+}
+
+/*
+ * wait for a video frame
+ *
+ * If a frame is ready, its index is returned.
+ */
+static int gspca_frame_wait(struct gspca_dev *gspca_dev,
+ int nonblock_ing)
+{
+ struct gspca_frame *frame;
+ int i, j, ret;
+
+ i = gspca_dev->fr_o;
+ j = gspca_dev->fr_queue[i];
+ frame = &gspca_dev->frame[j];
+ if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
+ goto ok;
+ if (nonblock_ing) /* no frame yet */
+ return -EAGAIN;
+
+ /* wait till a frame is ready */
+ for (;;) {
+ ret = wait_event_interruptible(gspca_dev->wq,
+ atomic_read(&gspca_dev->nevent) > 0);
+ if (ret != 0)
+ return ret;
+ i = gspca_dev->fr_o;
+ j = gspca_dev->fr_queue[i];
+ frame = &gspca_dev->frame[j];
+ if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
+ break;
+ }
+
+ok:
+ atomic_dec(&gspca_dev->nevent);
+ gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
+ PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
+ gspca_dev->fr_q,
+ gspca_dev->fr_i,
+ gspca_dev->fr_o);
+ return j;
+}
+
+/*
+ * dequeue a video buffer
+ *
+ * If nonblock_ing is false, block until a buffer is available.
+ */
+static int vidioc_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *v4l2_buf)
+{
+ struct gspca_dev *gspca_dev = priv;
+ struct gspca_frame *frame;
+ int i, ret;
+
+ PDEBUG(D_FRAM, "dqbuf");
+ if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+ || (v4l2_buf->memory != V4L2_MEMORY_MMAP
+ && v4l2_buf->memory != V4L2_MEMORY_USERPTR))
+ return -EINVAL;
+ if (!gspca_dev->streaming)
+ return -EINVAL;
+
+ /* only one read */
+ if (mutex_lock_interruptible(&gspca_dev->read_lock))
+ return -ERESTARTSYS;
+
+ ret = gspca_frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
+ if (ret < 0)
+ goto done;
+ i = ret; /* frame index */
+ frame = &gspca_dev->frame[i];
+ frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
+ memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
+ PDEBUG(D_FRAM, "dqbuf %d", i);
+ ret = 0;
+done:
+ mutex_unlock(&gspca_dev->read_lock);
+ return ret;
+}
+
+/*
+ * queue a video buffer
+ *
+ * Attempting to queue a buffer that has already been
+ * queued will return -EINVAL.
+ */
+static int vidioc_qbuf(struct file *file, void *priv,
+ struct v4l2_buffer *v4l2_buf)
+{
+ struct gspca_dev *gspca_dev = priv;
+ struct gspca_frame *frame;
+ int i, index, ret;
+
+ PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
+ if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ index = v4l2_buf->index;
+ if ((unsigned) index >= gspca_dev->nframes) {
+ PDEBUG(D_STREAM,
+ "qbuf idx %d >= %d", index, gspca_dev->nframes);
+ return -EINVAL;
+ }
+ frame = &gspca_dev->frame[index];
+
+ if (v4l2_buf->memory != frame->v4l2_buf.memory) {
+ PDEBUG(D_STREAM, "qbuf bad memory type");
+ return -EINVAL;
+ }
+
+ ret = mutex_lock_interruptible(&gspca_dev->queue_lock);
+ if (ret < 0)
+ return ret;
+ if (frame->v4l2_buf.flags
+ & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)) {
+ PDEBUG(D_STREAM, "qbuf bad state");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
+ frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
+
+ if (v4l2_buf->memory == V4L2_MEMORY_USERPTR) {
+ frame->data = frame->data_end =
+ (unsigned char *) v4l2_buf->m.userptr;
+ frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
+ frame->v4l2_buf.length = v4l2_buf->length;
+ }
+
+ /* put the buffer in the 'queued' queue */
+ i = gspca_dev->fr_q;
+ gspca_dev->fr_queue[i] = index;
+ gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
+ PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
+ gspca_dev->fr_q,
+ gspca_dev->fr_i,
+ gspca_dev->fr_o);
+
+ v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
+ v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
+ ret = 0;
+out:
+ mutex_unlock(&gspca_dev->queue_lock);
+ return ret;
+}
+
+static ssize_t dev_read(struct file *file, char __user *data,
+ size_t count, loff_t *ppos)
+{
+ struct gspca_dev *gspca_dev = file->private_data;
+ struct gspca_frame *frame;
+ struct v4l2_buffer v4l2_buf;
+ struct timeval timestamp;
+ int i, ret, ret2;
+
+ PDEBUG(D_FRAM, "read (%p, %d)", data, count);
+ if (gspca_dev->nframes == 0) {
+ struct v4l2_requestbuffers rb;
+
+ memset(&rb, 0, sizeof rb);
+ rb.count = gspca_dev->nbufread;
+ rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ rb.memory = V4L2_MEMORY_MMAP;
+ ret = vidioc_reqbufs(file, gspca_dev, &rb);
+ if (ret != 0) {
+ PDEBUG(D_STREAM, "read reqbuf err: %d", ret);
+ return ret;
+ }
+ memset(&v4l2_buf, 0, sizeof v4l2_buf);
+ v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ v4l2_buf.memory = V4L2_MEMORY_MMAP;
+ for (i = 0; i < gspca_dev->nbufread; i++) {
+ v4l2_buf.index = i;
+/*fixme: ugly!*/
+ gspca_dev->frame[i].v4l2_buf.flags |=
+ V4L2_BUF_FLAG_MAPPED;
+ ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
+ if (ret != 0) {
+ PDEBUG(D_STREAM, "read qbuf err: %d", ret);
+ return ret;
+ }
+ }
+ }
+ if (!gspca_dev->streaming) {
+ ret = vidioc_streamon(file, gspca_dev,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ if (ret != 0) {
+ PDEBUG(D_STREAM, "read streamon err %d", ret);
+ return ret;
+ }
+ }
+
+ /* get a frame */
+ jiffies_to_timeval(get_jiffies_64(), ×tamp);
+ timestamp.tv_sec--;
+ for (i = 0; i < 2; i++) {
+ memset(&v4l2_buf, 0, sizeof v4l2_buf);
+ v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ v4l2_buf.memory = V4L2_MEMORY_MMAP;
+ ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
+ if (ret != 0) {
+ PDEBUG(D_STREAM, "read dqbuf err %d", ret);
+ return ret;
+ }
+
+ /* if the process slept for more than 1 second,
+ * get a brand new frame */
+ frame = &gspca_dev->frame[v4l2_buf.index];
+ if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
+ break;
+ ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
+ if (ret != 0) {
+ PDEBUG(D_STREAM, "read qbuf err %d", ret);
+ return ret;
+ }
+ }
+
+ /* copy the frame */
+ if (count < frame->v4l2_buf.bytesused) {
+ PDEBUG(D_STREAM, "read bad count: %d < %d",
+ count, frame->v4l2_buf.bytesused);
+/*fixme: special errno?*/
+ ret = -EINVAL;
+ goto out;
+ }
+ count = frame->v4l2_buf.bytesused;
+ ret = copy_to_user(data, frame->data, count);
+ if (ret != 0) {
+ PDEBUG(D_ERR|D_STREAM,
+ "read cp to user lack %d / %d", ret, count);
+ ret = -EFAULT;
+ goto out;
+ }
+ ret = count;
+out:
+ /* in each case, requeue the buffer */
+ ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
+ if (ret2 != 0)
+ return ret2;
+ return ret;
+}
+
+static void gspca_dev_release(struct video_device *vfd)
+{
+ /* nothing */
+}
+
+static struct file_operations dev_fops = {
+ .owner = THIS_MODULE,
+ .open = dev_open,
+ .release = dev_close,
+ .read = dev_read,
+ .mmap = dev_mmap,
+ .ioctl = video_ioctl2,
+ .llseek = no_llseek,
+ .poll = dev_poll,
+};
+
+static struct video_device gspca_template = {
+ .name = "gspca main driver",
+ .type = VID_TYPE_CAPTURE,
+ .fops = &dev_fops,
+ .release = gspca_dev_release, /* mandatory */
+ .minor = -1,
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_dqbuf = vidioc_dqbuf,
+ .vidioc_qbuf = vidioc_qbuf,
+ .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
+ .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
+ .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
+ .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
+ .vidioc_streamon = vidioc_streamon,
+ .vidioc_queryctrl = vidioc_queryctrl,
+ .vidioc_g_ctrl = vidioc_g_ctrl,
+ .vidioc_s_ctrl = vidioc_s_ctrl,
+ .vidioc_querymenu = vidioc_querymenu,
+ .vidioc_enum_input = vidioc_enum_input,
+ .vidioc_g_input = vidioc_g_input,
+ .vidioc_s_input = vidioc_s_input,
+ .vidioc_reqbufs = vidioc_reqbufs,
+ .vidioc_querybuf = vidioc_querybuf,
+ .vidioc_streamoff = vidioc_streamoff,
+ .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
+ .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
+ .vidioc_g_parm = vidioc_g_parm,
+ .vidioc_s_parm = vidioc_s_parm,
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+ .vidiocgmbuf = vidiocgmbuf,
+#endif
+};
+
+/*
+ * probe and create a new gspca device
+ *
+ * This function must be called by the sub-driver when it is
+ * called for probing a new device.
+ */
+int gspca_dev_probe(struct usb_interface *intf,
+ const struct usb_device_id *id,
+ const struct sd_desc *sd_desc,
+ int dev_size)
+{
+ struct usb_interface_descriptor *interface;
+ struct gspca_dev *gspca_dev;
+ struct usb_device *dev = interface_to_usbdev(intf);
+ int ret;
+ __u16 vendor;
+ __u16 product;
+
+ vendor = le16_to_cpu(dev->descriptor.idVendor);
+ product = le16_to_cpu(dev->descriptor.idProduct);
+ PDEBUG(D_PROBE, "probing %04x:%04x", vendor, product);
+
+ /* we don't handle multi-config cameras */
+ if (dev->descriptor.bNumConfigurations != 1)
+ return -ENODEV;
+ interface = &intf->cur_altsetting->desc;
+ if (interface->bInterfaceNumber > 0)
+ return -ENODEV;
+
+ /* create the device */
+ if (dev_size < sizeof *gspca_dev)
+ dev_size = sizeof *gspca_dev;
+ gspca_dev = kzalloc(dev_size, GFP_KERNEL);
+ if (gspca_dev == NULL) {
+ err("couldn't kzalloc gspca struct");
+ return -EIO;
+ }
+ gspca_dev->dev = dev;
+ gspca_dev->iface = interface->bInterfaceNumber;
+ gspca_dev->sd_desc = sd_desc;
+/* gspca_dev->users = 0; (done by kzalloc) */
+ gspca_dev->nbufread = 2;
+
+ /* configure the subdriver */
+ ret = gspca_dev->sd_desc->config(gspca_dev, id);
+ if (ret < 0)
+ goto out;
+ ret = gspca_set_alt0(gspca_dev);
+ if (ret < 0)
+ goto out;
+ gspca_set_default_mode(gspca_dev);
+
+ mutex_init(&gspca_dev->usb_lock);
+ mutex_init(&gspca_dev->read_lock);
+ mutex_init(&gspca_dev->queue_lock);
+ init_waitqueue_head(&gspca_dev->wq);
+
+ /* init video stuff */
+ memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
+ gspca_dev->vdev.dev = &dev->dev;
+ ret = video_register_device(&gspca_dev->vdev,
+ VFL_TYPE_GRABBER,
+ video_nr);
+ if (ret < 0) {
+ err("video_register_device err %d", ret);
+ goto out;
+ }
+
+ gspca_dev->present = 1;
+ usb_set_intfdata(intf, gspca_dev);
+ PDEBUG(D_PROBE, "probe ok");
+ return 0;
+out:
+ kfree(gspca_dev);
+ return ret;
+}
+EXPORT_SYMBOL(gspca_dev_probe);
+
+/*
+ * USB disconnection
+ *
+ * This function must be called by the sub-driver
+ * when the device disconnects, after the specific resources are freed.
+ */
+void gspca_disconnect(struct usb_interface *intf)
+{
+ struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+
+ if (!gspca_dev)
+ return;
+ gspca_dev->present = 0;
+ mutex_lock_interruptible(&gspca_dev->queue_lock);
+ mutex_lock_interruptible(&gspca_dev->usb_lock);
+ gspca_kill_transfer(gspca_dev);
+ mutex_unlock(&gspca_dev->queue_lock);
+ mutex_unlock(&gspca_dev->usb_lock);
+ while (gspca_dev->users != 0) { /* wait until fully closed */
+ atomic_inc(&gspca_dev->nevent);
+ wake_up_interruptible(&gspca_dev->wq); /* wake processes */
+ schedule();
+ }
+/* We don't want people trying to open up the device */
+ video_unregister_device(&gspca_dev->vdev);
+/* Free the memory */
+ kfree(gspca_dev);
+ PDEBUG(D_PROBE, "disconnect complete");
+}
+EXPORT_SYMBOL(gspca_disconnect);
+
+/* -- module insert / remove -- */
+static int __init gspca_init(void)
+{
+ info("main v%s registered", version);
+ return 0;
+}
+static void __exit gspca_exit(void)
+{
+ info("main deregistered");
+}
+
+module_init(gspca_init);
+module_exit(gspca_exit);
+
+module_param_named(debug, gspca_debug, int, 0644);
+MODULE_PARM_DESC(debug,
+ "Debug (bit) 0x01:error 0x02:probe 0x04:config"
+ " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout");
+
+module_param(comp_fac, int, 0644);
+MODULE_PARM_DESC(comp_fac,
+ "Buffer size ratio when compressed in percent");