v4.19.13 snapshot.
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c
new file mode 100644
index 0000000..405a6a7
--- /dev/null
+++ b/drivers/media/usb/gspca/gspca.c
@@ -0,0 +1,1720 @@
+/*
+ * Main USB camera driver
+ *
+ * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
+ *
+ * Camera button input handling by Márton Németh
+ * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define GSPCA_VERSION "2.14.0"
+
+#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 <linux/io.h>
+#include <asm/page.h>
+#include <linux/uaccess.h>
+#include <linux/ktime.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+
+#include "gspca.h"
+
+#if IS_ENABLED(CONFIG_INPUT)
+#include <linux/input.h>
+#include <linux/usb/input.h>
+#endif
+
+/* global values */
+#define DEF_NURBS 3 /* default number of URBs */
+#if DEF_NURBS > MAX_NURBS
+#error "DEF_NURBS too big"
+#endif
+
+MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
+MODULE_DESCRIPTION("GSPCA USB Camera Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(GSPCA_VERSION);
+
+int gspca_debug;
+EXPORT_SYMBOL(gspca_debug);
+
+static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
+ __u32 pixfmt, int w, int h)
+{
+ if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
+ gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n",
+ txt,
+ pixfmt & 0xff,
+ (pixfmt >> 8) & 0xff,
+ (pixfmt >> 16) & 0xff,
+ pixfmt >> 24,
+ w, h);
+ } else {
+ gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n",
+ txt,
+ pixfmt,
+ w, h);
+ }
+}
+
+/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
+#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
+#define GSPCA_MEMORY_READ 7
+
+/*
+ * Input and interrupt endpoint handling functions
+ */
+#if IS_ENABLED(CONFIG_INPUT)
+static void int_irq(struct urb *urb)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ int ret;
+
+ ret = urb->status;
+ switch (ret) {
+ case 0:
+ if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
+ urb->transfer_buffer, urb->actual_length) < 0) {
+ gspca_err(gspca_dev, "Unknown packet received\n");
+ }
+ break;
+
+ case -ENOENT:
+ case -ECONNRESET:
+ case -ENODEV:
+ case -ESHUTDOWN:
+ /* Stop is requested either by software or hardware is gone,
+ * keep the ret value non-zero and don't resubmit later.
+ */
+ break;
+
+ default:
+ gspca_err(gspca_dev, "URB error %i, resubmitting\n",
+ urb->status);
+ urb->status = 0;
+ ret = 0;
+ }
+
+ if (ret == 0) {
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret < 0)
+ pr_err("Resubmit URB failed with error %i\n", ret);
+ }
+}
+
+static int gspca_input_connect(struct gspca_dev *dev)
+{
+ struct input_dev *input_dev;
+ int err = 0;
+
+ dev->input_dev = NULL;
+ if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
+ input_dev = input_allocate_device();
+ if (!input_dev)
+ return -ENOMEM;
+
+ usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
+ strlcat(dev->phys, "/input0", sizeof(dev->phys));
+
+ input_dev->name = dev->sd_desc->name;
+ input_dev->phys = dev->phys;
+
+ usb_to_input_id(dev->dev, &input_dev->id);
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY);
+ input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
+ input_dev->dev.parent = &dev->dev->dev;
+
+ err = input_register_device(input_dev);
+ if (err) {
+ pr_err("Input device registration failed with error %i\n",
+ err);
+ input_dev->dev.parent = NULL;
+ input_free_device(input_dev);
+ } else {
+ dev->input_dev = input_dev;
+ }
+ }
+
+ return err;
+}
+
+static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
+ struct usb_endpoint_descriptor *ep)
+{
+ unsigned int buffer_len;
+ int interval;
+ struct urb *urb;
+ struct usb_device *dev;
+ void *buffer = NULL;
+ int ret = -EINVAL;
+
+ buffer_len = le16_to_cpu(ep->wMaxPacketSize);
+ interval = ep->bInterval;
+ gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n",
+ ep->bEndpointAddress, buffer_len, interval);
+
+ dev = gspca_dev->dev;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ buffer = usb_alloc_coherent(dev, buffer_len,
+ GFP_KERNEL, &urb->transfer_dma);
+ if (!buffer) {
+ ret = -ENOMEM;
+ goto error_buffer;
+ }
+ usb_fill_int_urb(urb, dev,
+ usb_rcvintpipe(dev, ep->bEndpointAddress),
+ buffer, buffer_len,
+ int_irq, (void *)gspca_dev, interval);
+ urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ ret = usb_submit_urb(urb, GFP_KERNEL);
+ if (ret < 0) {
+ gspca_err(gspca_dev, "submit int URB failed with error %i\n",
+ ret);
+ goto error_submit;
+ }
+ gspca_dev->int_urb = urb;
+ return ret;
+
+error_submit:
+ usb_free_coherent(dev,
+ urb->transfer_buffer_length,
+ urb->transfer_buffer,
+ urb->transfer_dma);
+error_buffer:
+ usb_free_urb(urb);
+error:
+ return ret;
+}
+
+static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
+{
+ struct usb_interface *intf;
+ struct usb_host_interface *intf_desc;
+ struct usb_endpoint_descriptor *ep;
+ int i;
+
+ if (gspca_dev->sd_desc->int_pkt_scan) {
+ intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+ intf_desc = intf->cur_altsetting;
+ for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
+ ep = &intf_desc->endpoint[i].desc;
+ if (usb_endpoint_dir_in(ep) &&
+ usb_endpoint_xfer_int(ep)) {
+
+ alloc_and_submit_int_urb(gspca_dev, ep);
+ break;
+ }
+ }
+ }
+}
+
+static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
+{
+ struct urb *urb;
+
+ urb = gspca_dev->int_urb;
+ if (urb) {
+ gspca_dev->int_urb = NULL;
+ usb_kill_urb(urb);
+ usb_free_coherent(gspca_dev->dev,
+ urb->transfer_buffer_length,
+ urb->transfer_buffer,
+ urb->transfer_dma);
+ usb_free_urb(urb);
+ }
+}
+#else
+static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
+{
+}
+
+static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
+{
+}
+
+static inline int gspca_input_connect(struct gspca_dev *dev)
+{
+ return 0;
+}
+#endif
+
+/*
+ * fill a video frame from an URB and resubmit
+ */
+static void fill_frame(struct gspca_dev *gspca_dev,
+ struct urb *urb)
+{
+ 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)
+ return;
+#endif
+ gspca_err(gspca_dev, "urb status: %d\n", urb->status);
+ urb->status = 0;
+ goto resubmit;
+ }
+ pkt_scan = gspca_dev->sd_desc->pkt_scan;
+ for (i = 0; i < urb->number_of_packets; i++) {
+ len = urb->iso_frame_desc[i].actual_length;
+
+ /* check the packet status and length */
+ st = urb->iso_frame_desc[i].status;
+ if (st) {
+ pr_err("ISOC data error: [%d] len=%d, status=%d\n",
+ i, len, st);
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ continue;
+ }
+ if (len == 0) {
+ if (gspca_dev->empty_packet == 0)
+ gspca_dev->empty_packet = 1;
+ continue;
+ }
+
+ /* let the packet be analyzed by the subdriver */
+ gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n",
+ i, urb->iso_frame_desc[i].offset, len);
+ data = (u8 *) urb->transfer_buffer
+ + urb->iso_frame_desc[i].offset;
+ pkt_scan(gspca_dev, data, len);
+ }
+
+resubmit:
+ /* resubmit the URB */
+ st = usb_submit_urb(urb, GFP_ATOMIC);
+ if (st < 0)
+ pr_err("usb_submit_urb() ret %d\n", st);
+}
+
+/*
+ * ISOC message interrupt from the USB device
+ *
+ * Analyse each packet and call the subdriver for copy to the frame buffer.
+ */
+static void isoc_irq(struct urb *urb)
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+
+ gspca_dbg(gspca_dev, D_PACK, "isoc irq\n");
+ if (!vb2_start_streaming_called(&gspca_dev->queue))
+ return;
+ 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;
+ int st;
+
+ gspca_dbg(gspca_dev, D_PACK, "bulk irq\n");
+ if (!vb2_start_streaming_called(&gspca_dev->queue))
+ return;
+ switch (urb->status) {
+ case 0:
+ break;
+ case -ESHUTDOWN:
+ return; /* disconnection */
+ default:
+#ifdef CONFIG_PM
+ if (gspca_dev->frozen)
+ return;
+#endif
+ gspca_err(gspca_dev, "urb status: %d\n", urb->status);
+ urb->status = 0;
+ goto resubmit;
+ }
+
+ gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length);
+ gspca_dev->sd_desc->pkt_scan(gspca_dev,
+ urb->transfer_buffer,
+ urb->actual_length);
+
+resubmit:
+ /* resubmit the URB */
+ if (gspca_dev->cam.bulk_nurbs != 0) {
+ st = usb_submit_urb(urb, GFP_ATOMIC);
+ if (st < 0)
+ pr_err("usb_submit_urb() ret %d\n", 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.
+ */
+void gspca_frame_add(struct gspca_dev *gspca_dev,
+ enum gspca_packet_type packet_type,
+ const u8 *data,
+ int len)
+{
+ struct gspca_buffer *buf;
+ unsigned long flags;
+
+ gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len);
+
+ spin_lock_irqsave(&gspca_dev->qlock, flags);
+ buf = list_first_entry_or_null(&gspca_dev->buf_list,
+ typeof(*buf), list);
+ spin_unlock_irqrestore(&gspca_dev->qlock, flags);
+
+ if (packet_type == FIRST_PACKET) {
+ /* if there is no queued buffer, discard the whole frame */
+ if (!buf) {
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+ gspca_dev->sequence++;
+ return;
+ }
+ gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
+ gspca_dev->image_len = 0;
+ } else {
+ switch (gspca_dev->last_packet_type) {
+ case DISCARD_PACKET:
+ if (packet_type == LAST_PACKET) {
+ gspca_dev->last_packet_type = packet_type;
+ gspca_dev->image = NULL;
+ gspca_dev->image_len = 0;
+ }
+ return;
+ case LAST_PACKET:
+ return;
+ }
+ }
+
+ /* append the packet to the frame buffer */
+ if (len > 0) {
+ if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) {
+ gspca_err(gspca_dev, "frame overflow %d > %d\n",
+ gspca_dev->image_len + len,
+ PAGE_ALIGN(gspca_dev->pixfmt.sizeimage));
+ packet_type = DISCARD_PACKET;
+ } else {
+/* !! image is NULL only when last pkt is LAST or DISCARD
+ if (gspca_dev->image == NULL) {
+ pr_err("gspca_frame_add() image == NULL\n");
+ return;
+ }
+ */
+ memcpy(gspca_dev->image + gspca_dev->image_len,
+ data, len);
+ gspca_dev->image_len += len;
+ }
+ }
+ gspca_dev->last_packet_type = packet_type;
+
+ /* if last packet, invalidate packet concatenation until
+ * next first packet, wake up the application and advance
+ * in the queue */
+ if (packet_type == LAST_PACKET) {
+ spin_lock_irqsave(&gspca_dev->qlock, flags);
+ list_del(&buf->list);
+ spin_unlock_irqrestore(&gspca_dev->qlock, flags);
+ buf->vb.vb2_buf.timestamp = ktime_get_ns();
+ vb2_set_plane_payload(&buf->vb.vb2_buf, 0,
+ gspca_dev->image_len);
+ buf->vb.sequence = gspca_dev->sequence++;
+ buf->vb.field = V4L2_FIELD_NONE;
+ gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n",
+ gspca_dev->image_len);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+ gspca_dev->image = NULL;
+ gspca_dev->image_len = 0;
+ }
+}
+EXPORT_SYMBOL(gspca_frame_add);
+
+static void destroy_urbs(struct gspca_dev *gspca_dev)
+{
+ struct urb *urb;
+ unsigned int i;
+
+ gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n");
+
+ /* Killing all URBs guarantee that no URB completion
+ * handler is running. Therefore, there shouldn't
+ * be anyone trying to access gspca_dev->urb[i]
+ */
+ for (i = 0; i < MAX_NURBS; i++)
+ usb_kill_urb(gspca_dev->urb[i]);
+
+ gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n");
+ for (i = 0; i < MAX_NURBS; i++) {
+ urb = gspca_dev->urb[i];
+ if (!urb)
+ continue;
+ gspca_dev->urb[i] = NULL;
+ usb_free_coherent(gspca_dev->dev,
+ urb->transfer_buffer_length,
+ urb->transfer_buffer,
+ urb->transfer_dma);
+ usb_free_urb(urb);
+ }
+}
+
+static int gspca_set_alt0(struct gspca_dev *gspca_dev)
+{
+ int ret;
+
+ if (gspca_dev->alt == 0)
+ return 0;
+ ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
+ if (ret < 0)
+ pr_err("set alt 0 err %d\n", ret);
+ return ret;
+}
+
+/*
+ * look for an input transfer endpoint in an alternate setting.
+ *
+ * If xfer_ep is invalid, return the first valid ep found, otherwise
+ * look for exactly the ep with address equal to xfer_ep.
+ */
+static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
+ int xfer, int xfer_ep)
+{
+ struct usb_host_endpoint *ep;
+ int i, attr;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; i++) {
+ ep = &alt->endpoint[i];
+ attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+ if (attr == xfer
+ && ep->desc.wMaxPacketSize != 0
+ && usb_endpoint_dir_in(&ep->desc)
+ && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
+ return ep;
+ }
+ return NULL;
+}
+
+/* compute the minimum bandwidth for the current transfer */
+static u32 which_bandwidth(struct gspca_dev *gspca_dev)
+{
+ u32 bandwidth;
+
+ /* get the (max) image size */
+ bandwidth = gspca_dev->pixfmt.sizeimage;
+
+ /* if the image is compressed, estimate its mean size */
+ if (!gspca_dev->cam.needs_full_bandwidth &&
+ bandwidth < gspca_dev->pixfmt.width *
+ gspca_dev->pixfmt.height)
+ bandwidth = bandwidth * 3 / 8; /* 0.375 */
+
+ /* estimate the frame rate */
+ if (gspca_dev->sd_desc->get_streamparm) {
+ struct v4l2_streamparm parm;
+
+ gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
+ bandwidth *= parm.parm.capture.timeperframe.denominator;
+ bandwidth /= parm.parm.capture.timeperframe.numerator;
+ } else {
+
+ /* don't hope more than 15 fps with USB 1.1 and
+ * image resolution >= 640x480 */
+ if (gspca_dev->pixfmt.width >= 640
+ && gspca_dev->dev->speed == USB_SPEED_FULL)
+ bandwidth *= 15; /* 15 fps */
+ else
+ bandwidth *= 30; /* 30 fps */
+ }
+
+ gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth);
+ return bandwidth;
+}
+
+/* endpoint table */
+#define MAX_ALT 16
+struct ep_tb_s {
+ u32 alt;
+ u32 bandwidth;
+};
+
+/*
+ * build the table of the endpoints
+ * and compute the minimum bandwidth for the image transfer
+ */
+static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
+ struct usb_interface *intf,
+ struct ep_tb_s *ep_tb)
+{
+ struct usb_host_endpoint *ep;
+ int i, j, nbalt, psize, found;
+ u32 bandwidth, last_bw;
+
+ 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],
+ USB_ENDPOINT_XFER_ISOC,
+ gspca_dev->xfer_ep);
+ if (ep == NULL)
+ continue;
+ if (ep->desc.bInterval == 0) {
+ pr_err("alt %d iso endp with 0 interval\n", j);
+ continue;
+ }
+ psize = le16_to_cpu(ep->desc.wMaxPacketSize);
+ psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
+ bandwidth = psize * 1000;
+ if (gspca_dev->dev->speed == USB_SPEED_HIGH
+ || gspca_dev->dev->speed >= USB_SPEED_SUPER)
+ bandwidth *= 8;
+ bandwidth /= 1 << (ep->desc.bInterval - 1);
+ if (bandwidth <= last_bw)
+ continue;
+ if (bandwidth < ep_tb->bandwidth) {
+ ep_tb->bandwidth = bandwidth;
+ ep_tb->alt = j;
+ found = 1;
+ }
+ }
+ if (!found)
+ break;
+ gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n",
+ ep_tb->alt, ep_tb->bandwidth);
+ last_bw = ep_tb->bandwidth;
+ i++;
+ ep_tb++;
+ }
+
+ /*
+ * If the camera:
+ * has a usb audio class interface (a built in usb mic); and
+ * is a usb 1 full speed device; and
+ * uses the max full speed iso bandwidth; and
+ * and has more than 1 alt setting
+ * then skip the highest alt setting to spare bandwidth for the mic
+ */
+ if (gspca_dev->audio &&
+ gspca_dev->dev->speed == USB_SPEED_FULL &&
+ last_bw >= 1000000 &&
+ i > 1) {
+ gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n");
+ 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 i;
+}
+
+/*
+ * create the URBs for image transfer
+ */
+static int create_urbs(struct gspca_dev *gspca_dev,
+ struct usb_host_endpoint *ep)
+{
+ struct urb *urb;
+ int n, nurbs, i, psize, npkt, bsize;
+
+ /* calculate the packet size and the number of packets */
+ psize = le16_to_cpu(ep->desc.wMaxPacketSize);
+
+ if (!gspca_dev->cam.bulk) { /* isoc */
+
+ /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
+ if (gspca_dev->pkt_size == 0)
+ psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
+ else
+ psize = gspca_dev->pkt_size;
+ npkt = gspca_dev->cam.npkt;
+ if (npkt == 0)
+ npkt = 32; /* default value */
+ bsize = psize * npkt;
+ gspca_dbg(gspca_dev, D_STREAM,
+ "isoc %d pkts size %d = bsize:%d\n",
+ npkt, psize, bsize);
+ nurbs = DEF_NURBS;
+ } else { /* bulk */
+ npkt = 0;
+ bsize = gspca_dev->cam.bulk_size;
+ if (bsize == 0)
+ bsize = psize;
+ gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize);
+ if (gspca_dev->cam.bulk_nurbs != 0)
+ nurbs = gspca_dev->cam.bulk_nurbs;
+ else
+ nurbs = 1;
+ }
+
+ for (n = 0; n < nurbs; n++) {
+ urb = usb_alloc_urb(npkt, GFP_KERNEL);
+ if (!urb)
+ return -ENOMEM;
+ gspca_dev->urb[n] = urb;
+ urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
+ bsize,
+ GFP_KERNEL,
+ &urb->transfer_dma);
+
+ if (urb->transfer_buffer == NULL) {
+ pr_err("usb_alloc_coherent failed\n");
+ return -ENOMEM;
+ }
+ urb->dev = gspca_dev->dev;
+ urb->context = gspca_dev;
+ urb->transfer_buffer_length = bsize;
+ 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 = 1 << (ep->desc.bInterval - 1);
+ 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;
+}
+
+/* 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 = false;
+ gspca_dev->usb_err = 0;
+ if (gspca_dev->sd_desc->stopN)
+ gspca_dev->sd_desc->stopN(gspca_dev);
+ destroy_urbs(gspca_dev);
+ gspca_input_destroy_urb(gspca_dev);
+ gspca_set_alt0(gspca_dev);
+ if (gspca_dev->present)
+ gspca_input_create_urb(gspca_dev);
+ if (gspca_dev->sd_desc->stop0)
+ gspca_dev->sd_desc->stop0(gspca_dev);
+ gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n");
+}
+
+/*
+ * start the USB transfer
+ */
+static int gspca_init_transfer(struct gspca_dev *gspca_dev)
+{
+ struct usb_interface *intf;
+ struct usb_host_endpoint *ep;
+ struct urb *urb;
+ struct ep_tb_s ep_tb[MAX_ALT];
+ int n, ret, xfer, alt, alt_idx;
+
+ /* reset the streaming variables */
+ gspca_dev->image = NULL;
+ gspca_dev->image_len = 0;
+ gspca_dev->last_packet_type = DISCARD_PACKET;
+
+ gspca_dev->usb_err = 0;
+
+ /* 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)
+ return ret;
+ }
+ xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
+ : USB_ENDPOINT_XFER_ISOC;
+
+ /* if bulk or 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,
+ gspca_dev->xfer_ep);
+ if (ep == NULL) {
+ pr_err("bad altsetting %d\n", gspca_dev->alt);
+ return -EIO;
+ }
+ ep_tb[0].alt = gspca_dev->alt;
+ alt_idx = 1;
+ } else {
+ /* else, compute the minimum bandwidth
+ * and build the endpoint table */
+ alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
+ if (alt_idx <= 0) {
+ pr_err("no transfer endpoint found\n");
+ return -EIO;
+ }
+ }
+
+ /* 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 (intf->num_altsetting > 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) {
+ gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n",
+ alt);
+ ret = create_urbs(gspca_dev,
+ alt_xfer(&intf->altsetting[alt], xfer,
+ gspca_dev->xfer_ep));
+ if (ret < 0) {
+ destroy_urbs(gspca_dev);
+ goto out;
+ }
+ }
+
+ /* clear the bulk endpoint */
+ if (gspca_dev->cam.bulk)
+ usb_clear_halt(gspca_dev->dev,
+ gspca_dev->urb[0]->pipe);
+
+ /* start the cam */
+ ret = gspca_dev->sd_desc->start(gspca_dev);
+ if (ret < 0) {
+ destroy_urbs(gspca_dev);
+ goto out;
+ }
+ v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
+ gspca_dev->streaming = true;
+
+ /* some bulk transfers are started by the subdriver */
+ if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
+ break;
+
+ /* submit the URBs */
+ for (n = 0; n < MAX_NURBS; n++) {
+ urb = gspca_dev->urb[n];
+ if (urb == NULL)
+ break;
+ ret = usb_submit_urb(urb, GFP_KERNEL);
+ if (ret < 0)
+ break;
+ }
+ if (ret >= 0)
+ break; /* transfer is started */
+
+ /* something when wrong
+ * stop the webcam and free the transfer resources */
+ gspca_stream_off(gspca_dev);
+ if (ret != -ENOSPC) {
+ 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:
+ gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n",
+ 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 {
+ if (alt_idx <= 0) {
+ pr_err("no transfer endpoint found\n");
+ ret = -EIO;
+ goto out;
+ }
+ gspca_dev->alt = ep_tb[--alt_idx].alt;
+ }
+ }
+out:
+ gspca_input_create_urb(gspca_dev);
+ return ret;
+}
+
+static void 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->pixfmt = gspca_dev->cam.cam_mode[i];
+
+ /* does nothing if ctrl_handler == NULL */
+ v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
+}
+
+static int wxh_to_mode(struct gspca_dev *gspca_dev,
+ int width, int height)
+{
+ int i;
+
+ for (i = 0; i < gspca_dev->cam.nmodes; i++) {
+ if (width == gspca_dev->cam.cam_mode[i].width
+ && height == gspca_dev->cam.cam_mode[i].height)
+ return i;
+ }
+ return -EINVAL;
+}
+
+static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
+ int width, int height)
+{
+ int i;
+
+ for (i = gspca_dev->cam.nmodes; --i > 0; ) {
+ if (width >= gspca_dev->cam.cam_mode[i].width
+ && height >= gspca_dev->cam.cam_mode[i].height)
+ break;
+ }
+ return i;
+}
+
+/*
+ * 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].pixelformat
+ == pixfmt)
+ return modeD;
+ }
+ if (++modeU < gspca_dev->cam.nmodes) {
+ if (gspca_dev->cam.cam_mode[modeU].pixelformat
+ == pixfmt)
+ return modeU;
+ }
+ }
+ return -EINVAL;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int vidioc_g_chip_info(struct file *file, void *priv,
+ struct v4l2_dbg_chip_info *chip)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ gspca_dev->usb_err = 0;
+ if (gspca_dev->sd_desc->get_chip_info)
+ return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
+ return chip->match.addr ? -EINVAL : 0;
+}
+
+static int vidioc_g_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ gspca_dev->usb_err = 0;
+ return gspca_dev->sd_desc->get_register(gspca_dev, reg);
+}
+
+static int vidioc_s_register(struct file *file, void *priv,
+ const struct v4l2_dbg_register *reg)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ gspca_dev->usb_err = 0;
+ return gspca_dev->sd_desc->set_register(gspca_dev, reg);
+}
+#endif
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmtdesc)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+ int i, j, index;
+ __u32 fmt_tb[8];
+
+ /* give an index to each format */
+ index = 0;
+ for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
+ fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
+ 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 >= ARRAY_SIZE(fmt_tb))
+ return -EINVAL;
+ }
+ }
+ if (i < 0)
+ return -EINVAL; /* no more format */
+
+ fmtdesc->pixelformat = 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;
+ fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
+ fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
+ fmtdesc->description[4] = '\0';
+ return 0;
+}
+
+static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ fmt->fmt.pix = gspca_dev->pixfmt;
+ /* some drivers use priv internally, zero it before giving it back to
+ the core */
+ fmt->fmt.pix.priv = 0;
+ return 0;
+}
+
+static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
+ struct v4l2_format *fmt)
+{
+ int w, h, mode, mode2;
+
+ w = fmt->fmt.pix.width;
+ h = fmt->fmt.pix.height;
+
+ PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
+ fmt->fmt.pix.pixelformat, w, h);
+
+ /* search the nearest mode for width and height */
+ mode = wxh_to_nearest_mode(gspca_dev, w, h);
+
+ /* OK if right palette */
+ if (gspca_dev->cam.cam_mode[mode].pixelformat
+ != 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;
+ }
+ fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
+ if (gspca_dev->sd_desc->try_fmt) {
+ /* pass original resolution to subdriver try_fmt */
+ fmt->fmt.pix.width = w;
+ fmt->fmt.pix.height = h;
+ gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
+ }
+ /* some drivers use priv internally, zero it before giving it back to
+ the core */
+ fmt->fmt.pix.priv = 0;
+ return mode; /* used when s_fmt */
+}
+
+static int vidioc_try_fmt_vid_cap(struct file *file,
+ void *priv,
+ struct v4l2_format *fmt)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ if (try_fmt_vid_cap(gspca_dev, fmt) < 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+ int mode;
+
+ if (vb2_is_busy(&gspca_dev->queue))
+ return -EBUSY;
+
+ mode = try_fmt_vid_cap(gspca_dev, fmt);
+ if (mode < 0)
+ return -EINVAL;
+
+ gspca_dev->curr_mode = mode;
+ if (gspca_dev->sd_desc->try_fmt)
+ /* subdriver try_fmt can modify format parameters */
+ gspca_dev->pixfmt = fmt->fmt.pix;
+ else
+ gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode];
+ return 0;
+}
+
+static int vidioc_enum_framesizes(struct file *file, void *priv,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+ int i;
+ __u32 index = 0;
+
+ if (gspca_dev->sd_desc->enum_framesizes)
+ return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
+
+ for (i = 0; i < gspca_dev->cam.nmodes; i++) {
+ if (fsize->pixel_format !=
+ gspca_dev->cam.cam_mode[i].pixelformat)
+ continue;
+
+ if (fsize->index == index) {
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width =
+ gspca_dev->cam.cam_mode[i].width;
+ fsize->discrete.height =
+ gspca_dev->cam.cam_mode[i].height;
+ return 0;
+ }
+ index++;
+ }
+
+ return -EINVAL;
+}
+
+static int vidioc_enum_frameintervals(struct file *filp, void *priv,
+ struct v4l2_frmivalenum *fival)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(filp);
+ int mode;
+ __u32 i;
+
+ mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
+ if (mode < 0)
+ return -EINVAL;
+
+ if (gspca_dev->cam.mode_framerates == NULL ||
+ gspca_dev->cam.mode_framerates[mode].nrates == 0)
+ return -EINVAL;
+
+ if (fival->pixel_format !=
+ gspca_dev->cam.cam_mode[mode].pixelformat)
+ return -EINVAL;
+
+ for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
+ if (fival->index == i) {
+ fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+ fival->discrete.numerator = 1;
+ fival->discrete.denominator =
+ gspca_dev->cam.mode_framerates[mode].rates[i];
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static void gspca_release(struct v4l2_device *v4l2_device)
+{
+ struct gspca_dev *gspca_dev =
+ container_of(v4l2_device, struct gspca_dev, v4l2_dev);
+
+ v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
+ v4l2_device_unregister(&gspca_dev->v4l2_dev);
+ kfree(gspca_dev->usb_buf);
+ kfree(gspca_dev);
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
+ sizeof cap->driver);
+ if (gspca_dev->dev->product != NULL) {
+ strlcpy((char *) cap->card, gspca_dev->dev->product,
+ sizeof cap->card);
+ } else {
+ snprintf((char *) cap->card, sizeof cap->card,
+ "USB Camera (%04x:%04x)",
+ le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
+ le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
+ }
+ usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
+ sizeof(cap->bus_info));
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
+ | V4L2_CAP_STREAMING
+ | V4L2_CAP_READWRITE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *input)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ if (input->index != 0)
+ return -EINVAL;
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ input->status = gspca_dev->cam.input_flags;
+ strlcpy(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_g_jpegcomp(struct file *file, void *priv,
+ struct v4l2_jpegcompression *jpegcomp)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ gspca_dev->usb_err = 0;
+ return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
+}
+
+static int vidioc_s_jpegcomp(struct file *file, void *priv,
+ const struct v4l2_jpegcompression *jpegcomp)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+
+ gspca_dev->usb_err = 0;
+ return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
+}
+
+static int vidioc_g_parm(struct file *filp, void *priv,
+ struct v4l2_streamparm *parm)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(filp);
+
+ parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
+
+ if (!gspca_dev->sd_desc->get_streamparm)
+ return 0;
+
+ parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+ gspca_dev->usb_err = 0;
+ gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
+ return gspca_dev->usb_err;
+}
+
+static int vidioc_s_parm(struct file *filp, void *priv,
+ struct v4l2_streamparm *parm)
+{
+ struct gspca_dev *gspca_dev = video_drvdata(filp);
+
+ parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed;
+
+ if (!gspca_dev->sd_desc->set_streamparm) {
+ parm->parm.capture.capability = 0;
+ return 0;
+ }
+
+ parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+ gspca_dev->usb_err = 0;
+ gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
+ return gspca_dev->usb_err;
+}
+
+static int gspca_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], struct device *alloc_devs[])
+{
+ struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
+ unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
+
+ if (*nplanes)
+ return sizes[0] < size ? -EINVAL : 0;
+ *nplanes = 1;
+ sizes[0] = size;
+ return 0;
+}
+
+static int gspca_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage);
+
+ if (vb2_plane_size(vb, 0) < size) {
+ gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n",
+ vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void gspca_buffer_finish(struct vb2_buffer *vb)
+{
+ struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
+
+ if (!gspca_dev->sd_desc->dq_callback)
+ return;
+
+ gspca_dev->usb_err = 0;
+ if (gspca_dev->present)
+ gspca_dev->sd_desc->dq_callback(gspca_dev);
+}
+
+static void gspca_buffer_queue(struct vb2_buffer *vb)
+{
+ struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue);
+ struct gspca_buffer *buf = to_gspca_buffer(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&gspca_dev->qlock, flags);
+ list_add_tail(&buf->list, &gspca_dev->buf_list);
+ spin_unlock_irqrestore(&gspca_dev->qlock, flags);
+}
+
+static void gspca_return_all_buffers(struct gspca_dev *gspca_dev,
+ enum vb2_buffer_state state)
+{
+ struct gspca_buffer *buf, *node;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gspca_dev->qlock, flags);
+ list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) {
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ list_del(&buf->list);
+ }
+ spin_unlock_irqrestore(&gspca_dev->qlock, flags);
+}
+
+static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
+ int ret;
+
+ gspca_dev->sequence = 0;
+
+ ret = gspca_init_transfer(gspca_dev);
+ if (ret)
+ gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED);
+ return ret;
+}
+
+static void gspca_stop_streaming(struct vb2_queue *vq)
+{
+ struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq);
+
+ gspca_stream_off(gspca_dev);
+
+ /* Release all active buffers */
+ gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR);
+}
+
+static const struct vb2_ops gspca_qops = {
+ .queue_setup = gspca_queue_setup,
+ .buf_prepare = gspca_buffer_prepare,
+ .buf_finish = gspca_buffer_finish,
+ .buf_queue = gspca_buffer_queue,
+ .start_streaming = gspca_start_streaming,
+ .stop_streaming = gspca_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static const struct v4l2_file_operations dev_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .unlocked_ioctl = video_ioctl2,
+ .read = vb2_fop_read,
+ .mmap = vb2_fop_mmap,
+ .poll = vb2_fop_poll,
+};
+
+static const struct v4l2_ioctl_ops dev_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
+ .vidioc_enum_input = vidioc_enum_input,
+ .vidioc_g_input = vidioc_g_input,
+ .vidioc_s_input = vidioc_s_input,
+ .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
+ .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
+ .vidioc_g_parm = vidioc_g_parm,
+ .vidioc_s_parm = vidioc_s_parm,
+ .vidioc_enum_framesizes = vidioc_enum_framesizes,
+ .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .vidioc_g_chip_info = vidioc_g_chip_info,
+ .vidioc_g_register = vidioc_g_register,
+ .vidioc_s_register = vidioc_s_register,
+#endif
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct video_device gspca_template = {
+ .name = "gspca main driver",
+ .fops = &dev_fops,
+ .ioctl_ops = &dev_ioctl_ops,
+ .release = video_device_release_empty, /* We use v4l2_dev.release */
+};
+
+/*
+ * 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_probe2(struct usb_interface *intf,
+ const struct usb_device_id *id,
+ const struct sd_desc *sd_desc,
+ int dev_size,
+ struct module *module)
+{
+ struct gspca_dev *gspca_dev;
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct vb2_queue *q;
+ int ret;
+
+ 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) {
+ 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) {
+ pr_err("out of memory\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ gspca_dev->dev = dev;
+ gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
+ gspca_dev->xfer_ep = -1;
+
+ /* check if any audio device */
+ if (dev->actconfig->desc.bNumInterfaces != 1) {
+ int i;
+ struct usb_interface *intf2;
+
+ for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
+ intf2 = dev->actconfig->interface[i];
+ if (intf2 != NULL
+ && intf2->altsetting != NULL
+ && intf2->altsetting->desc.bInterfaceClass ==
+ USB_CLASS_AUDIO) {
+ gspca_dev->audio = 1;
+ break;
+ }
+ }
+ }
+
+ gspca_dev->v4l2_dev.release = gspca_release;
+ ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
+ if (ret)
+ goto out;
+ gspca_dev->present = true;
+ gspca_dev->sd_desc = sd_desc;
+ gspca_dev->empty_packet = -1; /* don't check the empty packets */
+ gspca_dev->vdev = gspca_template;
+ gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
+ video_set_drvdata(&gspca_dev->vdev, gspca_dev);
+ gspca_dev->module = module;
+
+ mutex_init(&gspca_dev->usb_lock);
+ gspca_dev->vdev.lock = &gspca_dev->usb_lock;
+ init_waitqueue_head(&gspca_dev->wq);
+
+ /* Initialize the vb2 queue */
+ q = &gspca_dev->queue;
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
+ q->drv_priv = gspca_dev;
+ q->buf_struct_size = sizeof(struct gspca_buffer);
+ q->ops = &gspca_qops;
+ q->mem_ops = &vb2_vmalloc_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->min_buffers_needed = 2;
+ q->lock = &gspca_dev->usb_lock;
+ ret = vb2_queue_init(q);
+ if (ret)
+ goto out;
+ gspca_dev->vdev.queue = q;
+
+ INIT_LIST_HEAD(&gspca_dev->buf_list);
+ spin_lock_init(&gspca_dev->qlock);
+
+ /* configure the subdriver and initialize the USB device */
+ ret = sd_desc->config(gspca_dev, id);
+ if (ret < 0)
+ goto out;
+ ret = sd_desc->init(gspca_dev);
+ if (ret < 0)
+ goto out;
+ if (sd_desc->init_controls)
+ ret = sd_desc->init_controls(gspca_dev);
+ if (ret < 0)
+ goto out;
+ gspca_set_default_mode(gspca_dev);
+
+ ret = gspca_input_connect(gspca_dev);
+ if (ret)
+ goto out;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ if (!gspca_dev->sd_desc->get_register)
+ v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
+ if (!gspca_dev->sd_desc->set_register)
+ v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
+#endif
+ if (!gspca_dev->sd_desc->get_jcomp)
+ v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
+ if (!gspca_dev->sd_desc->set_jcomp)
+ v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
+
+ /* init video stuff */
+ ret = video_register_device(&gspca_dev->vdev,
+ VFL_TYPE_GRABBER,
+ -1);
+ if (ret < 0) {
+ pr_err("video_register_device err %d\n", ret);
+ goto out;
+ }
+
+ usb_set_intfdata(intf, gspca_dev);
+ gspca_dbg(gspca_dev, D_PROBE, "%s created\n",
+ video_device_node_name(&gspca_dev->vdev));
+
+ gspca_input_create_urb(gspca_dev);
+
+ return 0;
+out:
+#if IS_ENABLED(CONFIG_INPUT)
+ if (gspca_dev->input_dev)
+ input_unregister_device(gspca_dev->input_dev);
+#endif
+ v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
+ kfree(gspca_dev->usb_buf);
+ kfree(gspca_dev);
+ return ret;
+}
+EXPORT_SYMBOL(gspca_dev_probe2);
+
+/* same function as the previous one, but check the interface */
+int gspca_dev_probe(struct usb_interface *intf,
+ const struct usb_device_id *id,
+ const struct sd_desc *sd_desc,
+ int dev_size,
+ struct module *module)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+
+ /* we don't handle multi-config cameras */
+ if (dev->descriptor.bNumConfigurations != 1) {
+ pr_err("%04x:%04x too many config\n",
+ id->idVendor, id->idProduct);
+ return -ENODEV;
+ }
+
+ /* the USB video interface must be the first one */
+ if (dev->actconfig->desc.bNumInterfaces != 1
+ && intf->cur_altsetting->desc.bInterfaceNumber != 0)
+ return -ENODEV;
+
+ return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
+}
+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 IS_ENABLED(CONFIG_INPUT)
+ struct input_dev *input_dev;
+#endif
+
+ gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n",
+ video_device_node_name(&gspca_dev->vdev));
+
+ mutex_lock(&gspca_dev->usb_lock);
+ gspca_dev->present = false;
+
+ vb2_queue_error(&gspca_dev->queue);
+
+#if IS_ENABLED(CONFIG_INPUT)
+ input_dev = gspca_dev->input_dev;
+ if (input_dev) {
+ gspca_dev->input_dev = NULL;
+ input_unregister_device(input_dev);
+ }
+#endif
+
+ v4l2_device_disconnect(&gspca_dev->v4l2_dev);
+ video_unregister_device(&gspca_dev->vdev);
+
+ mutex_unlock(&gspca_dev->usb_lock);
+
+ /* (this will call gspca_release() immediately or on last close) */
+ v4l2_device_put(&gspca_dev->v4l2_dev);
+}
+EXPORT_SYMBOL(gspca_disconnect);
+
+#ifdef CONFIG_PM
+int gspca_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+
+ gspca_input_destroy_urb(gspca_dev);
+
+ if (!vb2_start_streaming_called(&gspca_dev->queue))
+ return 0;
+
+ mutex_lock(&gspca_dev->usb_lock);
+ gspca_dev->frozen = 1; /* avoid urb error messages */
+ gspca_dev->usb_err = 0;
+ if (gspca_dev->sd_desc->stopN)
+ gspca_dev->sd_desc->stopN(gspca_dev);
+ destroy_urbs(gspca_dev);
+ gspca_set_alt0(gspca_dev);
+ if (gspca_dev->sd_desc->stop0)
+ gspca_dev->sd_desc->stop0(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(gspca_suspend);
+
+int gspca_resume(struct usb_interface *intf)
+{
+ struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+ int streaming, ret = 0;
+
+ mutex_lock(&gspca_dev->usb_lock);
+ gspca_dev->frozen = 0;
+ gspca_dev->usb_err = 0;
+ gspca_dev->sd_desc->init(gspca_dev);
+ /*
+ * Most subdrivers send all ctrl values on sd_start and thus
+ * only write to the device registers on s_ctrl when streaming ->
+ * Clear streaming to avoid setting all ctrls twice.
+ */
+ streaming = vb2_start_streaming_called(&gspca_dev->queue);
+ if (streaming)
+ ret = gspca_init_transfer(gspca_dev);
+ else
+ gspca_input_create_urb(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(gspca_resume);
+#endif
+
+/* -- module insert / remove -- */
+static int __init gspca_init(void)
+{
+ pr_info("v" GSPCA_VERSION " registered\n");
+ return 0;
+}
+static void __exit gspca_exit(void)
+{
+}
+
+module_init(gspca_init);
+module_exit(gspca_exit);
+
+module_param_named(debug, gspca_debug, int, 0644);
+MODULE_PARM_DESC(debug,
+ "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");