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977ba3b1b7
This ioctl is defined as IOW, so pass the argument as const. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2270 lines
56 KiB
C
2270 lines
56 KiB
C
/*
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* Main USB camera driver
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*
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* Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
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*
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* Camera button input handling by Márton Németh
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* Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#define GSPCA_VERSION "2.14.0"
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/vmalloc.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/pagemap.h>
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#include <linux/io.h>
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#include <asm/page.h>
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#include <linux/uaccess.h>
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#include <linux/ktime.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-event.h>
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#include "gspca.h"
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#if IS_ENABLED(CONFIG_INPUT)
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#include <linux/input.h>
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#include <linux/usb/input.h>
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#endif
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/* global values */
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#define DEF_NURBS 3 /* default number of URBs */
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#if DEF_NURBS > MAX_NURBS
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#error "DEF_NURBS too big"
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#endif
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MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
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MODULE_DESCRIPTION("GSPCA USB Camera Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(GSPCA_VERSION);
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int gspca_debug;
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EXPORT_SYMBOL(gspca_debug);
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static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
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__u32 pixfmt, int w, int h)
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{
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if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
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PDEBUG(debug, "%s %c%c%c%c %dx%d",
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txt,
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pixfmt & 0xff,
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(pixfmt >> 8) & 0xff,
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(pixfmt >> 16) & 0xff,
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pixfmt >> 24,
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w, h);
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} else {
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PDEBUG(debug, "%s 0x%08x %dx%d",
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txt,
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pixfmt,
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w, h);
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}
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}
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/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
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#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
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#define GSPCA_MEMORY_READ 7
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#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
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/*
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* VMA operations.
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*/
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static void gspca_vm_open(struct vm_area_struct *vma)
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{
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struct gspca_frame *frame = vma->vm_private_data;
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frame->vma_use_count++;
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frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
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}
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static void gspca_vm_close(struct vm_area_struct *vma)
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{
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struct gspca_frame *frame = vma->vm_private_data;
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if (--frame->vma_use_count <= 0)
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frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
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}
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static const struct vm_operations_struct gspca_vm_ops = {
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.open = gspca_vm_open,
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.close = gspca_vm_close,
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};
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/*
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* Input and interrupt endpoint handling functions
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*/
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#if IS_ENABLED(CONFIG_INPUT)
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static void int_irq(struct urb *urb)
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{
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struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
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int ret;
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ret = urb->status;
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switch (ret) {
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case 0:
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if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
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urb->transfer_buffer, urb->actual_length) < 0) {
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PERR("Unknown packet received");
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}
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break;
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case -ENOENT:
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case -ECONNRESET:
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case -ENODEV:
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case -ESHUTDOWN:
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/* Stop is requested either by software or hardware is gone,
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* keep the ret value non-zero and don't resubmit later.
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*/
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break;
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default:
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PERR("URB error %i, resubmitting", urb->status);
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urb->status = 0;
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ret = 0;
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}
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if (ret == 0) {
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ret = usb_submit_urb(urb, GFP_ATOMIC);
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if (ret < 0)
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pr_err("Resubmit URB failed with error %i\n", ret);
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}
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}
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static int gspca_input_connect(struct gspca_dev *dev)
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{
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struct input_dev *input_dev;
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int err = 0;
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dev->input_dev = NULL;
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if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
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input_dev = input_allocate_device();
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if (!input_dev)
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return -ENOMEM;
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usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
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strlcat(dev->phys, "/input0", sizeof(dev->phys));
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input_dev->name = dev->sd_desc->name;
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input_dev->phys = dev->phys;
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usb_to_input_id(dev->dev, &input_dev->id);
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input_dev->evbit[0] = BIT_MASK(EV_KEY);
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input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
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input_dev->dev.parent = &dev->dev->dev;
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err = input_register_device(input_dev);
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if (err) {
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pr_err("Input device registration failed with error %i\n",
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err);
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input_dev->dev.parent = NULL;
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input_free_device(input_dev);
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} else {
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dev->input_dev = input_dev;
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}
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}
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return err;
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}
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static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
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struct usb_endpoint_descriptor *ep)
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{
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unsigned int buffer_len;
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int interval;
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struct urb *urb;
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struct usb_device *dev;
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void *buffer = NULL;
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int ret = -EINVAL;
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buffer_len = le16_to_cpu(ep->wMaxPacketSize);
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interval = ep->bInterval;
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PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
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"buffer_len=%u, interval=%u",
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ep->bEndpointAddress, buffer_len, interval);
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dev = gspca_dev->dev;
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urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!urb) {
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ret = -ENOMEM;
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goto error;
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}
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buffer = usb_alloc_coherent(dev, buffer_len,
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GFP_KERNEL, &urb->transfer_dma);
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if (!buffer) {
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ret = -ENOMEM;
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goto error_buffer;
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}
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usb_fill_int_urb(urb, dev,
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usb_rcvintpipe(dev, ep->bEndpointAddress),
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buffer, buffer_len,
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int_irq, (void *)gspca_dev, interval);
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urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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ret = usb_submit_urb(urb, GFP_KERNEL);
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if (ret < 0) {
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PERR("submit int URB failed with error %i", ret);
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goto error_submit;
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}
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gspca_dev->int_urb = urb;
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return ret;
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error_submit:
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usb_free_coherent(dev,
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urb->transfer_buffer_length,
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urb->transfer_buffer,
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urb->transfer_dma);
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error_buffer:
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usb_free_urb(urb);
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error:
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return ret;
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}
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static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
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{
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struct usb_interface *intf;
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struct usb_host_interface *intf_desc;
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struct usb_endpoint_descriptor *ep;
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int i;
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if (gspca_dev->sd_desc->int_pkt_scan) {
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intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
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intf_desc = intf->cur_altsetting;
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for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
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ep = &intf_desc->endpoint[i].desc;
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if (usb_endpoint_dir_in(ep) &&
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usb_endpoint_xfer_int(ep)) {
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alloc_and_submit_int_urb(gspca_dev, ep);
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break;
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}
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}
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}
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}
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static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
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{
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struct urb *urb;
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urb = gspca_dev->int_urb;
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if (urb) {
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gspca_dev->int_urb = NULL;
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usb_kill_urb(urb);
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usb_free_coherent(gspca_dev->dev,
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urb->transfer_buffer_length,
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urb->transfer_buffer,
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urb->transfer_dma);
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usb_free_urb(urb);
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}
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}
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#else
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static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
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{
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}
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static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
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{
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}
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static inline int gspca_input_connect(struct gspca_dev *dev)
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{
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return 0;
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}
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#endif
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/*
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* fill a video frame from an URB and resubmit
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*/
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static void fill_frame(struct gspca_dev *gspca_dev,
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struct urb *urb)
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{
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u8 *data; /* address of data in the iso message */
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int i, len, st;
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cam_pkt_op pkt_scan;
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if (urb->status != 0) {
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if (urb->status == -ESHUTDOWN)
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return; /* disconnection */
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#ifdef CONFIG_PM
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if (gspca_dev->frozen)
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return;
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#endif
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PERR("urb status: %d", urb->status);
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urb->status = 0;
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goto resubmit;
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}
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pkt_scan = gspca_dev->sd_desc->pkt_scan;
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for (i = 0; i < urb->number_of_packets; i++) {
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len = urb->iso_frame_desc[i].actual_length;
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/* check the packet status and length */
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st = urb->iso_frame_desc[i].status;
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if (st) {
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pr_err("ISOC data error: [%d] len=%d, status=%d\n",
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i, len, st);
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gspca_dev->last_packet_type = DISCARD_PACKET;
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continue;
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}
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if (len == 0) {
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if (gspca_dev->empty_packet == 0)
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gspca_dev->empty_packet = 1;
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continue;
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}
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/* let the packet be analyzed by the subdriver */
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PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
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i, urb->iso_frame_desc[i].offset, len);
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data = (u8 *) urb->transfer_buffer
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+ urb->iso_frame_desc[i].offset;
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pkt_scan(gspca_dev, data, len);
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}
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resubmit:
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/* resubmit the URB */
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st = usb_submit_urb(urb, GFP_ATOMIC);
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if (st < 0)
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pr_err("usb_submit_urb() ret %d\n", st);
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}
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/*
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* ISOC message interrupt from the USB device
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*
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* Analyse each packet and call the subdriver for copy to the frame buffer.
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*/
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static void isoc_irq(struct urb *urb)
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{
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struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
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PDEBUG(D_PACK, "isoc irq");
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if (!gspca_dev->streaming)
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return;
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fill_frame(gspca_dev, urb);
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}
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/*
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* bulk message interrupt from the USB device
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*/
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static void bulk_irq(struct urb *urb)
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{
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struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
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int st;
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PDEBUG(D_PACK, "bulk irq");
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if (!gspca_dev->streaming)
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return;
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switch (urb->status) {
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case 0:
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break;
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case -ESHUTDOWN:
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return; /* disconnection */
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default:
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#ifdef CONFIG_PM
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if (gspca_dev->frozen)
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return;
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#endif
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PERR("urb status: %d", urb->status);
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urb->status = 0;
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goto resubmit;
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}
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PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
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gspca_dev->sd_desc->pkt_scan(gspca_dev,
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urb->transfer_buffer,
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urb->actual_length);
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resubmit:
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/* resubmit the URB */
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if (gspca_dev->cam.bulk_nurbs != 0) {
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st = usb_submit_urb(urb, GFP_ATOMIC);
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if (st < 0)
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pr_err("usb_submit_urb() ret %d\n", st);
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}
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}
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/*
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* add data to the current frame
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*
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* This function is called by the subdrivers at interrupt level.
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*
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* To build a frame, these ones must add
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* - one FIRST_PACKET
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* - 0 or many INTER_PACKETs
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* - one LAST_PACKET
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* DISCARD_PACKET invalidates the whole frame.
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*/
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void gspca_frame_add(struct gspca_dev *gspca_dev,
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enum gspca_packet_type packet_type,
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const u8 *data,
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int len)
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{
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struct gspca_frame *frame;
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int i, j;
|
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PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
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if (packet_type == FIRST_PACKET) {
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i = atomic_read(&gspca_dev->fr_i);
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|
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/* if there are no queued buffer, discard the whole frame */
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if (i == atomic_read(&gspca_dev->fr_q)) {
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gspca_dev->last_packet_type = DISCARD_PACKET;
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gspca_dev->sequence++;
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return;
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}
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j = gspca_dev->fr_queue[i];
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frame = &gspca_dev->frame[j];
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frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
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frame->v4l2_buf.sequence = gspca_dev->sequence++;
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gspca_dev->image = frame->data;
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gspca_dev->image_len = 0;
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} else {
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switch (gspca_dev->last_packet_type) {
|
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case DISCARD_PACKET:
|
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if (packet_type == LAST_PACKET) {
|
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gspca_dev->last_packet_type = packet_type;
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gspca_dev->image = NULL;
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gspca_dev->image_len = 0;
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}
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return;
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case LAST_PACKET:
|
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return;
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}
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}
|
|
|
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/* append the packet to the frame buffer */
|
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if (len > 0) {
|
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if (gspca_dev->image_len + len > gspca_dev->frsz) {
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PERR("frame overflow %d > %d",
|
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gspca_dev->image_len + len,
|
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gspca_dev->frsz);
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packet_type = DISCARD_PACKET;
|
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} else {
|
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/* !! image is NULL only when last pkt is LAST or DISCARD
|
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if (gspca_dev->image == NULL) {
|
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pr_err("gspca_frame_add() image == NULL\n");
|
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return;
|
|
}
|
|
*/
|
|
memcpy(gspca_dev->image + gspca_dev->image_len,
|
|
data, len);
|
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gspca_dev->image_len += len;
|
|
}
|
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}
|
|
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) {
|
|
i = atomic_read(&gspca_dev->fr_i);
|
|
j = gspca_dev->fr_queue[i];
|
|
frame = &gspca_dev->frame[j];
|
|
frame->v4l2_buf.bytesused = gspca_dev->image_len;
|
|
frame->v4l2_buf.flags = (frame->v4l2_buf.flags
|
|
| V4L2_BUF_FLAG_DONE)
|
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& ~V4L2_BUF_FLAG_QUEUED;
|
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i = (i + 1) % GSPCA_MAX_FRAMES;
|
|
atomic_set(&gspca_dev->fr_i, i);
|
|
wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
|
|
PDEBUG(D_FRAM, "frame complete len:%d",
|
|
frame->v4l2_buf.bytesused);
|
|
gspca_dev->image = NULL;
|
|
gspca_dev->image_len = 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(gspca_frame_add);
|
|
|
|
static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
|
|
enum v4l2_memory memory, unsigned int count)
|
|
{
|
|
struct gspca_frame *frame;
|
|
unsigned int frsz;
|
|
int i;
|
|
|
|
i = gspca_dev->curr_mode;
|
|
frsz = gspca_dev->cam.cam_mode[i].sizeimage;
|
|
PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
|
|
frsz = PAGE_ALIGN(frsz);
|
|
if (count >= GSPCA_MAX_FRAMES)
|
|
count = GSPCA_MAX_FRAMES - 1;
|
|
gspca_dev->frbuf = vmalloc_32(frsz * count);
|
|
if (!gspca_dev->frbuf) {
|
|
pr_err("frame alloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
gspca_dev->capt_file = file;
|
|
gspca_dev->memory = memory;
|
|
gspca_dev->frsz = frsz;
|
|
gspca_dev->nframes = count;
|
|
for (i = 0; i < count; i++) {
|
|
frame = &gspca_dev->frame[i];
|
|
frame->v4l2_buf.index = i;
|
|
frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
frame->v4l2_buf.flags = 0;
|
|
frame->v4l2_buf.field = V4L2_FIELD_NONE;
|
|
frame->v4l2_buf.length = frsz;
|
|
frame->v4l2_buf.memory = memory;
|
|
frame->v4l2_buf.sequence = 0;
|
|
frame->data = gspca_dev->frbuf + i * frsz;
|
|
frame->v4l2_buf.m.offset = i * frsz;
|
|
}
|
|
atomic_set(&gspca_dev->fr_q, 0);
|
|
atomic_set(&gspca_dev->fr_i, 0);
|
|
gspca_dev->fr_o = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void frame_free(struct gspca_dev *gspca_dev)
|
|
{
|
|
int i;
|
|
|
|
PDEBUG(D_STREAM, "frame free");
|
|
if (gspca_dev->frbuf != NULL) {
|
|
vfree(gspca_dev->frbuf);
|
|
gspca_dev->frbuf = NULL;
|
|
for (i = 0; i < gspca_dev->nframes; i++)
|
|
gspca_dev->frame[i].data = NULL;
|
|
}
|
|
gspca_dev->nframes = 0;
|
|
gspca_dev->frsz = 0;
|
|
gspca_dev->capt_file = NULL;
|
|
gspca_dev->memory = GSPCA_MEMORY_NO;
|
|
}
|
|
|
|
static void destroy_urbs(struct gspca_dev *gspca_dev)
|
|
{
|
|
struct urb *urb;
|
|
unsigned int i;
|
|
|
|
PDEBUG(D_STREAM, "kill transfer");
|
|
for (i = 0; i < MAX_NURBS; i++) {
|
|
urb = gspca_dev->urb[i];
|
|
if (urb == NULL)
|
|
break;
|
|
|
|
gspca_dev->urb[i] = 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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* Note: both the queue and the usb locks should be held when calling this */
|
|
static void gspca_stream_off(struct gspca_dev *gspca_dev)
|
|
{
|
|
gspca_dev->streaming = 0;
|
|
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);
|
|
gspca_input_create_urb(gspca_dev);
|
|
if (gspca_dev->sd_desc->stop0)
|
|
gspca_dev->sd_desc->stop0(gspca_dev);
|
|
PDEBUG(D_STREAM, "stream off OK");
|
|
}
|
|
|
|
/*
|
|
* look for an input transfer endpoint in an alternate setting
|
|
*/
|
|
static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
|
|
int xfer)
|
|
{
|
|
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))
|
|
return ep;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* compute the minimum bandwidth for the current transfer */
|
|
static u32 which_bandwidth(struct gspca_dev *gspca_dev)
|
|
{
|
|
u32 bandwidth;
|
|
int i;
|
|
|
|
/* get the (max) image size */
|
|
i = gspca_dev->curr_mode;
|
|
bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
|
|
|
|
/* if the image is compressed, estimate its mean size */
|
|
if (!gspca_dev->cam.needs_full_bandwidth &&
|
|
bandwidth < gspca_dev->cam.cam_mode[i].width *
|
|
gspca_dev->cam.cam_mode[i].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->width >= 640
|
|
&& gspca_dev->dev->speed == USB_SPEED_FULL)
|
|
bandwidth *= 15; /* 15 fps */
|
|
else
|
|
bandwidth *= 30; /* 30 fps */
|
|
}
|
|
|
|
PDEBUG(D_STREAM, "min bandwidth: %d", 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);
|
|
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;
|
|
PDEBUG(D_STREAM, "alt %d bandwidth %d",
|
|
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) {
|
|
PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
|
|
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;
|
|
PDEBUG(D_STREAM,
|
|
"isoc %d pkts size %d = bsize:%d",
|
|
npkt, psize, bsize);
|
|
nurbs = DEF_NURBS;
|
|
} else { /* bulk */
|
|
npkt = 0;
|
|
bsize = gspca_dev->cam.bulk_size;
|
|
if (bsize == 0)
|
|
bsize = psize;
|
|
PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
|
|
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) {
|
|
pr_err("usb_alloc_urb failed\n");
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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->sequence = 0;
|
|
|
|
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);
|
|
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) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
gspca_dev->streaming = 1;
|
|
v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
|
|
|
|
/* 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:
|
|
PERR("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 {
|
|
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->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].pixelformat;
|
|
|
|
/* 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 = 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_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_g_chip_ident(struct file *file, void *priv,
|
|
struct v4l2_dbg_chip_ident *chip)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
|
|
gspca_dev->usb_err = 0;
|
|
return gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
|
|
}
|
|
|
|
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;
|
|
j = 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);
|
|
int mode;
|
|
|
|
mode = gspca_dev->curr_mode;
|
|
fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
|
|
/* some drivers use priv internally, zero it before giving it to
|
|
userspace */
|
|
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 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].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];
|
|
/* some drivers use priv internally, zero it before giving it to
|
|
userspace */
|
|
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);
|
|
int ret;
|
|
|
|
ret = try_fmt_vid_cap(gspca_dev, fmt);
|
|
if (ret < 0)
|
|
return ret;
|
|
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 ret;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
ret = try_fmt_vid_cap(gspca_dev, fmt);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
if (gspca_dev->nframes != 0
|
|
&& fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (ret == gspca_dev->curr_mode) {
|
|
ret = 0;
|
|
goto out; /* same mode */
|
|
}
|
|
|
|
if (gspca_dev->streaming) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
gspca_dev->width = fmt->fmt.pix.width;
|
|
gspca_dev->height = fmt->fmt.pix.height;
|
|
gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
|
|
gspca_dev->curr_mode = ret;
|
|
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
|
|
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 = wxh_to_mode(gspca_dev, fival->width, fival->height);
|
|
__u32 i;
|
|
|
|
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_FRMSIZE_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 dev_open(struct file *file)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
|
|
PDEBUG(D_STREAM, "[%s] open", current->comm);
|
|
|
|
/* protect the subdriver against rmmod */
|
|
if (!try_module_get(gspca_dev->module))
|
|
return -ENODEV;
|
|
|
|
return v4l2_fh_open(file);
|
|
}
|
|
|
|
static int dev_close(struct file *file)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
|
|
PDEBUG(D_STREAM, "[%s] close", current->comm);
|
|
|
|
/* Needed for gspca_stream_off, always lock before queue_lock! */
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
/* if the file did the capture, free the streaming resources */
|
|
if (gspca_dev->capt_file == file) {
|
|
if (gspca_dev->streaming)
|
|
gspca_stream_off(gspca_dev);
|
|
frame_free(gspca_dev);
|
|
}
|
|
module_put(gspca_dev->module);
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
|
|
PDEBUG(D_STREAM, "close done");
|
|
|
|
return v4l2_fh_release(file);
|
|
}
|
|
|
|
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_reqbufs(struct file *file, void *priv,
|
|
struct v4l2_requestbuffers *rb)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
int i, ret = 0, streaming;
|
|
|
|
i = rb->memory; /* (avoid compilation warning) */
|
|
switch (i) {
|
|
case GSPCA_MEMORY_READ: /* (internal call) */
|
|
case V4L2_MEMORY_MMAP:
|
|
case V4L2_MEMORY_USERPTR:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (gspca_dev->memory != GSPCA_MEMORY_NO
|
|
&& gspca_dev->memory != GSPCA_MEMORY_READ
|
|
&& gspca_dev->memory != rb->memory) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* only one file may do the capture */
|
|
if (gspca_dev->capt_file != NULL
|
|
&& gspca_dev->capt_file != file) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* if allocated, the buffers must not be mapped */
|
|
for (i = 0; i < gspca_dev->nframes; i++) {
|
|
if (gspca_dev->frame[i].vma_use_count) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* stop streaming */
|
|
streaming = gspca_dev->streaming;
|
|
if (streaming) {
|
|
gspca_stream_off(gspca_dev);
|
|
|
|
/* Don't restart the stream when switching from read
|
|
* to mmap mode */
|
|
if (gspca_dev->memory == GSPCA_MEMORY_READ)
|
|
streaming = 0;
|
|
}
|
|
|
|
/* free the previous allocated buffers, if any */
|
|
if (gspca_dev->nframes != 0)
|
|
frame_free(gspca_dev);
|
|
if (rb->count == 0) /* unrequest */
|
|
goto out;
|
|
ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
|
|
if (ret == 0) {
|
|
rb->count = gspca_dev->nframes;
|
|
if (streaming)
|
|
ret = gspca_init_transfer(gspca_dev);
|
|
}
|
|
out:
|
|
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 = video_drvdata(file);
|
|
struct gspca_frame *frame;
|
|
|
|
if (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 = video_drvdata(file);
|
|
int ret;
|
|
|
|
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
/* check the capture file */
|
|
if (gspca_dev->capt_file != file) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
if (gspca_dev->nframes == 0
|
|
|| !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (!gspca_dev->streaming) {
|
|
ret = gspca_init_transfer(gspca_dev);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK", gspca_dev->pixfmt,
|
|
gspca_dev->width, gspca_dev->height);
|
|
ret = 0;
|
|
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 = video_drvdata(file);
|
|
int i, ret;
|
|
|
|
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (!gspca_dev->streaming) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* check the capture file */
|
|
if (gspca_dev->capt_file != file) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* stop streaming */
|
|
gspca_stream_off(gspca_dev);
|
|
/* In case another thread is waiting in dqbuf */
|
|
wake_up_interruptible(&gspca_dev->wq);
|
|
|
|
/* empty the transfer queues */
|
|
for (i = 0; i < gspca_dev->nframes; i++)
|
|
gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
|
|
atomic_set(&gspca_dev->fr_q, 0);
|
|
atomic_set(&gspca_dev->fr_i, 0);
|
|
gspca_dev->fr_o = 0;
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
return ret;
|
|
}
|
|
|
|
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->nbufread;
|
|
|
|
if (gspca_dev->sd_desc->get_streamparm) {
|
|
gspca_dev->usb_err = 0;
|
|
gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
|
|
return gspca_dev->usb_err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_parm(struct file *filp, void *priv,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(filp);
|
|
int n;
|
|
|
|
n = parm->parm.capture.readbuffers;
|
|
if (n == 0 || n >= GSPCA_MAX_FRAMES)
|
|
parm->parm.capture.readbuffers = gspca_dev->nbufread;
|
|
else
|
|
gspca_dev->nbufread = n;
|
|
|
|
if (gspca_dev->sd_desc->set_streamparm) {
|
|
gspca_dev->usb_err = 0;
|
|
gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
|
|
return gspca_dev->usb_err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dev_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
struct gspca_frame *frame;
|
|
struct page *page;
|
|
unsigned long addr, start, size;
|
|
int i, ret;
|
|
|
|
start = vma->vm_start;
|
|
size = vma->vm_end - vma->vm_start;
|
|
PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->capt_file != file) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
frame = NULL;
|
|
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 == NULL) {
|
|
PDEBUG(D_STREAM, "mmap no frame buffer found");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (size != frame->v4l2_buf.length) {
|
|
PDEBUG(D_STREAM, "mmap bad size");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* - 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 out;
|
|
start += PAGE_SIZE;
|
|
addr += PAGE_SIZE;
|
|
size -= PAGE_SIZE;
|
|
}
|
|
|
|
vma->vm_ops = &gspca_vm_ops;
|
|
vma->vm_private_data = frame;
|
|
gspca_vm_open(vma);
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
|
|
enum v4l2_memory memory)
|
|
{
|
|
if (!gspca_dev->present)
|
|
return -ENODEV;
|
|
if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
|
|
!gspca_dev->streaming)
|
|
return -EINVAL;
|
|
|
|
/* check if a frame is ready */
|
|
return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
|
|
}
|
|
|
|
static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
|
|
enum v4l2_memory memory)
|
|
{
|
|
int ret;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
ret = frame_ready_nolock(gspca_dev, file, memory);
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 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 = video_drvdata(file);
|
|
struct gspca_frame *frame;
|
|
int i, j, ret;
|
|
|
|
PDEBUG(D_FRAM, "dqbuf");
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
for (;;) {
|
|
ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
|
|
if (ret < 0)
|
|
goto out;
|
|
if (ret > 0)
|
|
break;
|
|
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
|
|
if (file->f_flags & O_NONBLOCK)
|
|
return -EAGAIN;
|
|
|
|
/* wait till a frame is ready */
|
|
ret = wait_event_interruptible_timeout(gspca_dev->wq,
|
|
frame_ready(gspca_dev, file, v4l2_buf->memory),
|
|
msecs_to_jiffies(3000));
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret == 0)
|
|
return -EIO;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
i = gspca_dev->fr_o;
|
|
j = gspca_dev->fr_queue[i];
|
|
frame = &gspca_dev->frame[j];
|
|
|
|
gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
|
|
|
|
frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
|
|
memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
|
|
PDEBUG(D_FRAM, "dqbuf %d", j);
|
|
ret = 0;
|
|
|
|
if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
|
|
if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
|
|
frame->data,
|
|
frame->v4l2_buf.bytesused)) {
|
|
PERR("dqbuf cp to user failed");
|
|
ret = -EFAULT;
|
|
}
|
|
}
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
|
|
if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
gspca_dev->usb_err = 0;
|
|
if (gspca_dev->present)
|
|
gspca_dev->sd_desc->dq_callback(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_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 = video_drvdata(file);
|
|
struct gspca_frame *frame;
|
|
int i, index, ret;
|
|
|
|
PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
index = v4l2_buf->index;
|
|
if ((unsigned) index >= gspca_dev->nframes) {
|
|
PDEBUG(D_FRAM,
|
|
"qbuf idx %d >= %d", index, gspca_dev->nframes);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (v4l2_buf->memory != gspca_dev->memory) {
|
|
PDEBUG(D_FRAM, "qbuf bad memory type");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
frame = &gspca_dev->frame[index];
|
|
if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
|
|
PDEBUG(D_FRAM, "qbuf bad state");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
|
|
|
|
if (frame->v4l2_buf.memory == V4L2_MEMORY_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 = atomic_read(&gspca_dev->fr_q);
|
|
gspca_dev->fr_queue[i] = index;
|
|
atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* allocate the resources for read()
|
|
*/
|
|
static int read_alloc(struct gspca_dev *gspca_dev,
|
|
struct file *file)
|
|
{
|
|
struct v4l2_buffer v4l2_buf;
|
|
int i, ret;
|
|
|
|
PDEBUG(D_STREAM, "read alloc");
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
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 = GSPCA_MEMORY_READ;
|
|
ret = vidioc_reqbufs(file, gspca_dev, &rb);
|
|
if (ret != 0) {
|
|
PDEBUG(D_STREAM, "read reqbuf err %d", ret);
|
|
goto out;
|
|
}
|
|
memset(&v4l2_buf, 0, sizeof v4l2_buf);
|
|
v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
v4l2_buf.memory = GSPCA_MEMORY_READ;
|
|
for (i = 0; i < gspca_dev->nbufread; i++) {
|
|
v4l2_buf.index = i;
|
|
ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
|
|
if (ret != 0) {
|
|
PDEBUG(D_STREAM, "read qbuf err: %d", ret);
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* start streaming */
|
|
ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
|
|
if (ret != 0)
|
|
PDEBUG(D_STREAM, "read streamon err %d", ret);
|
|
out:
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
static unsigned int dev_poll(struct file *file, poll_table *wait)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
unsigned long req_events = poll_requested_events(wait);
|
|
int ret = 0;
|
|
|
|
PDEBUG(D_FRAM, "poll");
|
|
|
|
if (req_events & POLLPRI)
|
|
ret |= v4l2_ctrl_poll(file, wait);
|
|
|
|
if (req_events & (POLLIN | POLLRDNORM)) {
|
|
/* if reqbufs is not done, the user would use read() */
|
|
if (gspca_dev->memory == GSPCA_MEMORY_NO) {
|
|
if (read_alloc(gspca_dev, file) != 0) {
|
|
ret |= POLLERR;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
poll_wait(file, &gspca_dev->wq, wait);
|
|
|
|
/* check if an image has been received */
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
|
|
ret |= POLLERR;
|
|
goto out;
|
|
}
|
|
if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
|
|
ret |= POLLIN | POLLRDNORM;
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
}
|
|
|
|
out:
|
|
if (!gspca_dev->present)
|
|
ret |= POLLHUP;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t dev_read(struct file *file, char __user *data,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct gspca_dev *gspca_dev = video_drvdata(file);
|
|
struct gspca_frame *frame;
|
|
struct v4l2_buffer v4l2_buf;
|
|
struct timeval timestamp;
|
|
int n, ret, ret2;
|
|
|
|
PDEBUG(D_FRAM, "read (%zd)", count);
|
|
if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
|
|
ret = read_alloc(gspca_dev, file);
|
|
if (ret != 0)
|
|
return ret;
|
|
}
|
|
|
|
/* get a frame */
|
|
timestamp = ktime_to_timeval(ktime_get());
|
|
timestamp.tv_sec--;
|
|
n = 2;
|
|
for (;;) {
|
|
memset(&v4l2_buf, 0, sizeof v4l2_buf);
|
|
v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
v4l2_buf.memory = GSPCA_MEMORY_READ;
|
|
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 newer frame */
|
|
frame = &gspca_dev->frame[v4l2_buf.index];
|
|
if (--n < 0)
|
|
break; /* avoid infinite loop */
|
|
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)
|
|
count = frame->v4l2_buf.bytesused;
|
|
ret = copy_to_user(data, frame->data, count);
|
|
if (ret != 0) {
|
|
PERR("read cp to user lack %d / %zd", 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 struct v4l2_file_operations dev_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = dev_open,
|
|
.release = dev_close,
|
|
.read = dev_read,
|
|
.mmap = dev_mmap,
|
|
.unlocked_ioctl = video_ioctl2,
|
|
.poll = dev_poll,
|
|
};
|
|
|
|
static const struct v4l2_ioctl_ops dev_ioctl_ops = {
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_dqbuf = vidioc_dqbuf,
|
|
.vidioc_qbuf = vidioc_qbuf,
|
|
.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_streamon = vidioc_streamon,
|
|
.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,
|
|
.vidioc_enum_framesizes = vidioc_enum_framesizes,
|
|
.vidioc_enum_frameintervals = vidioc_enum_frameintervals,
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
.vidioc_g_register = vidioc_g_register,
|
|
.vidioc_s_register = vidioc_s_register,
|
|
#endif
|
|
.vidioc_g_chip_ident = vidioc_g_chip_ident,
|
|
.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);
|
|
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;
|
|
|
|
/* 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->sd_desc = sd_desc;
|
|
gspca_dev->nbufread = 2;
|
|
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);
|
|
set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
|
|
gspca_dev->module = module;
|
|
gspca_dev->present = 1;
|
|
|
|
mutex_init(&gspca_dev->usb_lock);
|
|
gspca_dev->vdev.lock = &gspca_dev->usb_lock;
|
|
mutex_init(&gspca_dev->queue_lock);
|
|
init_waitqueue_head(&gspca_dev->wq);
|
|
|
|
/* 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;
|
|
|
|
/*
|
|
* Don't take usb_lock for these ioctls. This improves latency if
|
|
* usb_lock is taken for a long time, e.g. when changing a control
|
|
* value, and a new frame is ready to be dequeued.
|
|
*/
|
|
v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
|
|
v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
|
|
v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
|
|
if (!gspca_dev->sd_desc->get_chip_ident)
|
|
v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_CHIP_IDENT);
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG
|
|
if (!gspca_dev->sd_desc->get_chip_ident ||
|
|
!gspca_dev->sd_desc->get_register)
|
|
v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
|
|
if (!gspca_dev->sd_desc->get_chip_ident ||
|
|
!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);
|
|
PDEBUG(D_PROBE, "%s created", 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
|
|
|
|
PDEBUG(D_PROBE, "%s disconnect",
|
|
video_device_node_name(&gspca_dev->vdev));
|
|
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
|
|
gspca_dev->present = 0;
|
|
destroy_urbs(gspca_dev);
|
|
|
|
#if IS_ENABLED(CONFIG_INPUT)
|
|
gspca_input_destroy_urb(gspca_dev);
|
|
input_dev = gspca_dev->input_dev;
|
|
if (input_dev) {
|
|
gspca_dev->input_dev = NULL;
|
|
input_unregister_device(input_dev);
|
|
}
|
|
#endif
|
|
/* Free subdriver's streaming resources / stop sd workqueue(s) */
|
|
if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
|
|
gspca_dev->sd_desc->stop0(gspca_dev);
|
|
gspca_dev->streaming = 0;
|
|
gspca_dev->dev = NULL;
|
|
wake_up_interruptible(&gspca_dev->wq);
|
|
|
|
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 (!gspca_dev->streaming)
|
|
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 = gspca_dev->streaming;
|
|
gspca_dev->streaming = 0;
|
|
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");
|