![Jean-Francois Moine](/assets/img/avatar_default.png)
Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2260 lines
54 KiB
C
2260 lines
54 KiB
C
/*
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* Main USB camera driver
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*
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* Copyright (C) 2008-2009 Jean-Francois Moine (http://moinejf.free.fr)
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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 MODULE_NAME "gspca"
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#include <linux/init.h>
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#include <linux/version.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/jiffies.h>
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#include <media/v4l2-ioctl.h>
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#include "gspca.h"
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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-Francois 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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#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 8, 0)
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#ifdef GSPCA_DEBUG
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int gspca_debug = D_ERR | D_PROBE;
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EXPORT_SYMBOL(gspca_debug);
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static void PDEBUG_MODE(char *txt, __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(D_CONF|D_STREAM, "%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(D_CONF|D_STREAM, "%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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#else
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#define PDEBUG_MODE(txt, pixfmt, w, h)
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#endif
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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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/* get the current input frame buffer */
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struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
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{
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struct gspca_frame *frame;
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int i;
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i = gspca_dev->fr_i;
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i = gspca_dev->fr_queue[i];
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frame = &gspca_dev->frame[i];
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if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
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!= V4L2_BUF_FLAG_QUEUED)
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return NULL;
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return frame;
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}
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EXPORT_SYMBOL(gspca_get_i_frame);
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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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PDEBUG(D_ERR|D_PACK, "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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/* check the packet status and length */
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len = urb->iso_frame_desc[i].actual_length;
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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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st = urb->iso_frame_desc[i].status;
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if (st) {
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PDEBUG(D_ERR,
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"ISOC data error: [%d] len=%d, status=%d",
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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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/* 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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PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", 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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PDEBUG(D_ERR|D_PACK, "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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PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", 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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* On LAST_PACKET, a new frame is returned.
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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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/* check the availability of the frame buffer */
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frame = gspca_dev->cur_frame;
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if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
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!= V4L2_BUF_FLAG_QUEUED) {
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gspca_dev->last_packet_type = DISCARD_PACKET;
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return;
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}
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/* when start of a new frame, if the current frame buffer
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* is not queued, discard the whole frame */
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if (packet_type == FIRST_PACKET) {
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frame->data_end = frame->data;
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jiffies_to_timeval(get_jiffies_64(),
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&frame->v4l2_buf.timestamp);
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frame->v4l2_buf.sequence = ++gspca_dev->sequence;
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} else if (gspca_dev->last_packet_type == 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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return;
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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 (frame->data_end - frame->data + len
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> frame->v4l2_buf.length) {
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PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d",
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frame->data_end - frame->data + len,
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frame->v4l2_buf.length);
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packet_type = DISCARD_PACKET;
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} else {
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memcpy(frame->data_end, data, len);
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frame->data_end += len;
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}
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}
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gspca_dev->last_packet_type = packet_type;
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/* if last packet, wake up the application and advance in the queue */
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if (packet_type == LAST_PACKET) {
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frame->v4l2_buf.bytesused = frame->data_end - frame->data;
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frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
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frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
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wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
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i = (gspca_dev->fr_i + 1) % gspca_dev->nframes;
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gspca_dev->fr_i = i;
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PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
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frame->v4l2_buf.bytesused,
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gspca_dev->fr_q,
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i,
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gspca_dev->fr_o);
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j = gspca_dev->fr_queue[i];
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gspca_dev->cur_frame = &gspca_dev->frame[j];
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}
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return;
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}
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EXPORT_SYMBOL(gspca_frame_add);
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static int gspca_is_compressed(__u32 format)
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{
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switch (format) {
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case V4L2_PIX_FMT_MJPEG:
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case V4L2_PIX_FMT_JPEG:
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case V4L2_PIX_FMT_SPCA561:
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case V4L2_PIX_FMT_PAC207:
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case V4L2_PIX_FMT_MR97310A:
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return 1;
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}
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return 0;
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}
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static void *rvmalloc(unsigned long size)
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{
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void *mem;
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unsigned long adr;
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mem = vmalloc_32(size);
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if (mem != NULL) {
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adr = (unsigned long) mem;
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while ((long) size > 0) {
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SetPageReserved(vmalloc_to_page((void *) adr));
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adr += PAGE_SIZE;
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size -= PAGE_SIZE;
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}
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}
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return mem;
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}
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static void rvfree(void *mem, long size)
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{
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unsigned long adr;
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adr = (unsigned long) mem;
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while (size > 0) {
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ClearPageReserved(vmalloc_to_page((void *) adr));
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adr += PAGE_SIZE;
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size -= PAGE_SIZE;
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}
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vfree(mem);
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}
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static int frame_alloc(struct gspca_dev *gspca_dev,
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unsigned int count)
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{
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struct gspca_frame *frame;
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unsigned int frsz;
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int i;
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i = gspca_dev->curr_mode;
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frsz = gspca_dev->cam.cam_mode[i].sizeimage;
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PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
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frsz = PAGE_ALIGN(frsz);
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gspca_dev->frsz = frsz;
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if (count > GSPCA_MAX_FRAMES)
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count = GSPCA_MAX_FRAMES;
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gspca_dev->frbuf = rvmalloc(frsz * count);
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if (!gspca_dev->frbuf) {
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err("frame alloc failed");
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return -ENOMEM;
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}
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gspca_dev->nframes = count;
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for (i = 0; i < count; i++) {
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frame = &gspca_dev->frame[i];
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frame->v4l2_buf.index = i;
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frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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frame->v4l2_buf.flags = 0;
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frame->v4l2_buf.field = V4L2_FIELD_NONE;
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frame->v4l2_buf.length = frsz;
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frame->v4l2_buf.memory = gspca_dev->memory;
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frame->v4l2_buf.sequence = 0;
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frame->data = frame->data_end =
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gspca_dev->frbuf + i * frsz;
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frame->v4l2_buf.m.offset = i * frsz;
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}
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gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
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gspca_dev->cur_frame = &gspca_dev->frame[0];
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gspca_dev->last_packet_type = DISCARD_PACKET;
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gspca_dev->sequence = 0;
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return 0;
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}
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static void frame_free(struct gspca_dev *gspca_dev)
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{
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int i;
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PDEBUG(D_STREAM, "frame free");
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if (gspca_dev->frbuf != NULL) {
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rvfree(gspca_dev->frbuf,
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gspca_dev->nframes * gspca_dev->frsz);
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gspca_dev->frbuf = NULL;
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for (i = 0; i < gspca_dev->nframes; i++)
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gspca_dev->frame[i].data = NULL;
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}
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gspca_dev->nframes = 0;
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}
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static void destroy_urbs(struct gspca_dev *gspca_dev)
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{
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struct urb *urb;
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unsigned int i;
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PDEBUG(D_STREAM, "kill transfer");
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for (i = 0; i < MAX_NURBS; i++) {
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urb = gspca_dev->urb[i];
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if (urb == NULL)
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break;
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gspca_dev->urb[i] = NULL;
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usb_kill_urb(urb);
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if (urb->transfer_buffer != NULL)
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usb_buffer_free(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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|
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/*
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* look for an input transfer endpoint in an alternate setting
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*/
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static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
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int xfer)
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{
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struct usb_host_endpoint *ep;
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int i, attr;
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for (i = 0; i < alt->desc.bNumEndpoints; i++) {
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ep = &alt->endpoint[i];
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attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
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if (attr == xfer
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&& ep->desc.wMaxPacketSize != 0)
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return ep;
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}
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return NULL;
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}
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|
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/*
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* look for an input (isoc or bulk) endpoint
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*
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* The endpoint is defined by the subdriver.
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* Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
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* This routine may be called many times when the bandwidth is too small
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* (the bandwidth is checked on urb submit).
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*/
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static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
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{
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struct usb_interface *intf;
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struct usb_host_endpoint *ep;
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int xfer, i, ret;
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intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
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ep = NULL;
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xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
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: USB_ENDPOINT_XFER_ISOC;
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i = gspca_dev->alt; /* previous alt setting */
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if (gspca_dev->cam.reverse_alts) {
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while (++i < gspca_dev->nbalt) {
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ep = alt_xfer(&intf->altsetting[i], xfer);
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if (ep)
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break;
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}
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} else {
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while (--i >= 0) {
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ep = alt_xfer(&intf->altsetting[i], xfer);
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if (ep)
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break;
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}
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}
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if (ep == NULL) {
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err("no transfer endpoint found");
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return NULL;
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}
|
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PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
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i, ep->desc.bEndpointAddress);
|
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gspca_dev->alt = i; /* memorize the current alt setting */
|
|
if (gspca_dev->nbalt > 1) {
|
|
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
|
|
if (ret < 0) {
|
|
err("set alt %d err %d", i, ret);
|
|
return NULL;
|
|
}
|
|
}
|
|
return ep;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
gspca_dev->nurbs = nurbs;
|
|
for (n = 0; n < nurbs; n++) {
|
|
urb = usb_alloc_urb(npkt, GFP_KERNEL);
|
|
if (!urb) {
|
|
err("usb_alloc_urb failed");
|
|
destroy_urbs(gspca_dev);
|
|
return -ENOMEM;
|
|
}
|
|
urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
|
|
bsize,
|
|
GFP_KERNEL,
|
|
&urb->transfer_dma);
|
|
|
|
if (urb->transfer_buffer == NULL) {
|
|
usb_free_urb(urb);
|
|
err("usb_buffer_urb failed");
|
|
destroy_urbs(gspca_dev);
|
|
return -ENOMEM;
|
|
}
|
|
gspca_dev->urb[n] = urb;
|
|
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 = ep->desc.bInterval;
|
|
urb->complete = isoc_irq;
|
|
urb->number_of_packets = npkt;
|
|
for (i = 0; i < npkt; i++) {
|
|
urb->iso_frame_desc[i].length = psize;
|
|
urb->iso_frame_desc[i].offset = psize * i;
|
|
}
|
|
} else { /* bulk */
|
|
urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
|
|
ep->desc.bEndpointAddress),
|
|
urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
|
|
urb->complete = bulk_irq;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* start the USB transfer
|
|
*/
|
|
static int gspca_init_transfer(struct gspca_dev *gspca_dev)
|
|
{
|
|
struct usb_host_endpoint *ep;
|
|
int n, ret;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (!gspca_dev->present) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* set the higher alternate setting and
|
|
* loop until urb submit succeeds */
|
|
if (gspca_dev->cam.reverse_alts)
|
|
gspca_dev->alt = 0;
|
|
else
|
|
gspca_dev->alt = gspca_dev->nbalt;
|
|
|
|
if (gspca_dev->sd_desc->isoc_init) {
|
|
ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
ep = get_ep(gspca_dev);
|
|
if (ep == NULL) {
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
for (;;) {
|
|
PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
|
|
ret = create_urbs(gspca_dev, ep);
|
|
if (ret < 0)
|
|
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;
|
|
|
|
/* 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 < gspca_dev->nurbs; n++) {
|
|
ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
if (ret >= 0)
|
|
break;
|
|
gspca_dev->streaming = 0;
|
|
destroy_urbs(gspca_dev);
|
|
if (ret != -ENOSPC) {
|
|
PDEBUG(D_ERR|D_STREAM,
|
|
"usb_submit_urb alt %d err %d",
|
|
gspca_dev->alt, ret);
|
|
goto out;
|
|
}
|
|
|
|
/* the bandwidth is not wide enough
|
|
* negociate or try a lower alternate setting */
|
|
PDEBUG(D_ERR|D_STREAM,
|
|
"bandwidth not wide enough - trying again");
|
|
msleep(20); /* wait for kill complete */
|
|
if (gspca_dev->sd_desc->isoc_nego) {
|
|
ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
|
|
if (ret < 0)
|
|
goto out;
|
|
} else {
|
|
ep = get_ep(gspca_dev);
|
|
if (ep == NULL) {
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
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)
|
|
PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", 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;
|
|
if (gspca_dev->present) {
|
|
if (gspca_dev->sd_desc->stopN)
|
|
gspca_dev->sd_desc->stopN(gspca_dev);
|
|
destroy_urbs(gspca_dev);
|
|
gspca_set_alt0(gspca_dev);
|
|
}
|
|
|
|
/* always call stop0 to free the subdriver's resources */
|
|
if (gspca_dev->sd_desc->stop0)
|
|
gspca_dev->sd_desc->stop0(gspca_dev);
|
|
PDEBUG(D_STREAM, "stream off OK");
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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)
|
|
{
|
|
int ret;
|
|
struct gspca_dev *gspca_dev = priv;
|
|
|
|
if (!gspca_dev->sd_desc->get_chip_ident)
|
|
return -EINVAL;
|
|
|
|
if (!gspca_dev->sd_desc->get_register)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vidioc_s_register(struct file *file, void *priv,
|
|
struct v4l2_dbg_register *reg)
|
|
{
|
|
int ret;
|
|
struct gspca_dev *gspca_dev = priv;
|
|
|
|
if (!gspca_dev->sd_desc->get_chip_ident)
|
|
return -EINVAL;
|
|
|
|
if (!gspca_dev->sd_desc->set_register)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static int vidioc_g_chip_ident(struct file *file, void *priv,
|
|
struct v4l2_dbg_chip_ident *chip)
|
|
{
|
|
int ret;
|
|
struct gspca_dev *gspca_dev = priv;
|
|
|
|
if (!gspca_dev->sd_desc->get_chip_ident)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_fmtdesc *fmtdesc)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
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_is_compressed(fmt_tb[index]))
|
|
fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
|
|
fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
|
|
fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
|
|
fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
|
|
fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
|
|
fmtdesc->description[4] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_format *fmt)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
int mode;
|
|
|
|
mode = gspca_dev->curr_mode;
|
|
memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
|
|
sizeof fmt->fmt.pix);
|
|
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;
|
|
|
|
#ifdef GSPCA_DEBUG
|
|
if (gspca_debug & D_CONF)
|
|
PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
|
|
#endif
|
|
/* search the closest mode for width and height */
|
|
mode = wxh_to_mode(gspca_dev, w, h);
|
|
|
|
/* OK if right palette */
|
|
if (gspca_dev->cam.cam_mode[mode].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;
|
|
/* else
|
|
; * no chance, return this mode */
|
|
}
|
|
memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
|
|
sizeof fmt->fmt.pix);
|
|
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 = priv;
|
|
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 = priv;
|
|
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 = priv;
|
|
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 void gspca_release(struct video_device *vfd)
|
|
{
|
|
struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
|
|
|
|
PDEBUG(D_PROBE, "/dev/video%d released", gspca_dev->vdev.num);
|
|
|
|
kfree(gspca_dev->usb_buf);
|
|
kfree(gspca_dev);
|
|
}
|
|
|
|
static int dev_open(struct file *file)
|
|
{
|
|
struct gspca_dev *gspca_dev;
|
|
int ret;
|
|
|
|
PDEBUG(D_STREAM, "[%s] open", current->comm);
|
|
gspca_dev = (struct gspca_dev *) video_devdata(file);
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
if (!gspca_dev->present) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (gspca_dev->users > 4) { /* (arbitrary value) */
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* protect the subdriver against rmmod */
|
|
if (!try_module_get(gspca_dev->module)) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
gspca_dev->users++;
|
|
|
|
file->private_data = gspca_dev;
|
|
#ifdef GSPCA_DEBUG
|
|
/* activate the v4l2 debug */
|
|
if (gspca_debug & D_V4L2)
|
|
gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
|
|
| V4L2_DEBUG_IOCTL_ARG;
|
|
else
|
|
gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
|
|
| V4L2_DEBUG_IOCTL_ARG);
|
|
#endif
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
if (ret != 0)
|
|
PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
|
|
else
|
|
PDEBUG(D_STREAM, "open done");
|
|
return ret;
|
|
}
|
|
|
|
static int dev_close(struct file *file)
|
|
{
|
|
struct gspca_dev *gspca_dev = file->private_data;
|
|
|
|
PDEBUG(D_STREAM, "[%s] close", current->comm);
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
gspca_dev->users--;
|
|
|
|
/* if the file did the capture, free the streaming resources */
|
|
if (gspca_dev->capt_file == file) {
|
|
if (gspca_dev->streaming) {
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
gspca_stream_off(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
}
|
|
frame_free(gspca_dev);
|
|
gspca_dev->capt_file = NULL;
|
|
gspca_dev->memory = GSPCA_MEMORY_NO;
|
|
}
|
|
file->private_data = NULL;
|
|
module_put(gspca_dev->module);
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
|
|
PDEBUG(D_STREAM, "close done");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
int ret;
|
|
|
|
/* protect the access to the usb device */
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (!gspca_dev->present) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
|
|
if (gspca_dev->dev->product != NULL) {
|
|
strncpy(cap->card, gspca_dev->dev->product,
|
|
sizeof cap->card);
|
|
} else {
|
|
snprintf(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, cap->bus_info, sizeof(cap->bus_info));
|
|
cap->version = DRIVER_VERSION_NUMBER;
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
|
|
| V4L2_CAP_STREAMING
|
|
| V4L2_CAP_READWRITE;
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
|
|
int id)
|
|
{
|
|
const struct ctrl *ctrls;
|
|
int i;
|
|
|
|
for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
|
|
i < gspca_dev->sd_desc->nctrls;
|
|
i++, ctrls++) {
|
|
if (gspca_dev->ctrl_dis & (1 << i))
|
|
continue;
|
|
if (id == ctrls->qctrl.id)
|
|
return ctrls;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int vidioc_queryctrl(struct file *file, void *priv,
|
|
struct v4l2_queryctrl *q_ctrl)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
const struct ctrl *ctrls;
|
|
int i;
|
|
u32 id;
|
|
|
|
ctrls = NULL;
|
|
id = q_ctrl->id;
|
|
if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
|
|
id &= V4L2_CTRL_ID_MASK;
|
|
id++;
|
|
for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
|
|
if (gspca_dev->ctrl_dis & (1 << i))
|
|
continue;
|
|
if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
|
|
continue;
|
|
if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id
|
|
> ctrls->qctrl.id)
|
|
continue;
|
|
ctrls = &gspca_dev->sd_desc->ctrls[i];
|
|
}
|
|
} else {
|
|
ctrls = get_ctrl(gspca_dev, id);
|
|
i = ctrls - gspca_dev->sd_desc->ctrls;
|
|
}
|
|
if (ctrls == NULL)
|
|
return -EINVAL;
|
|
memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
|
|
if (gspca_dev->ctrl_inac & (1 << i))
|
|
q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
const struct ctrl *ctrls;
|
|
int ret;
|
|
|
|
ctrls = get_ctrl(gspca_dev, ctrl->id);
|
|
if (ctrls == NULL)
|
|
return -EINVAL;
|
|
|
|
if (ctrl->value < ctrls->qctrl.minimum
|
|
|| ctrl->value > ctrls->qctrl.maximum)
|
|
return -ERANGE;
|
|
PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = ctrls->set(gspca_dev, ctrl->value);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vidioc_g_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
const struct ctrl *ctrls;
|
|
int ret;
|
|
|
|
ctrls = get_ctrl(gspca_dev, ctrl->id);
|
|
if (ctrls == NULL)
|
|
return -EINVAL;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = ctrls->get(gspca_dev, &ctrl->value);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*fixme: have an audio flag in gspca_dev?*/
|
|
static int vidioc_s_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *audio)
|
|
{
|
|
if (audio->index != 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *audio)
|
|
{
|
|
strcpy(audio->name, "Microphone");
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_enumaudio(struct file *file, void *priv,
|
|
struct v4l2_audio *audio)
|
|
{
|
|
if (audio->index != 0)
|
|
return -EINVAL;
|
|
|
|
strcpy(audio->name, "Microphone");
|
|
audio->capability = 0;
|
|
audio->mode = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_querymenu(struct file *file, void *priv,
|
|
struct v4l2_querymenu *qmenu)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
|
|
if (!gspca_dev->sd_desc->querymenu)
|
|
return -EINVAL;
|
|
return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
|
|
}
|
|
|
|
static int vidioc_enum_input(struct file *file, void *priv,
|
|
struct v4l2_input *input)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
|
|
if (input->index != 0)
|
|
return -EINVAL;
|
|
input->type = V4L2_INPUT_TYPE_CAMERA;
|
|
input->status = gspca_dev->cam.input_flags;
|
|
strncpy(input->name, gspca_dev->sd_desc->name,
|
|
sizeof input->name);
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
|
|
{
|
|
*i = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
|
|
{
|
|
if (i > 0)
|
|
return -EINVAL;
|
|
return (0);
|
|
}
|
|
|
|
static int vidioc_reqbufs(struct file *file, void *priv,
|
|
struct v4l2_requestbuffers *rb)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
int i, ret = 0;
|
|
|
|
switch (rb->memory) {
|
|
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 != 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 */
|
|
if (gspca_dev->streaming) {
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
gspca_stream_off(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
}
|
|
|
|
/* free the previous allocated buffers, if any */
|
|
if (gspca_dev->nframes != 0) {
|
|
frame_free(gspca_dev);
|
|
gspca_dev->capt_file = NULL;
|
|
}
|
|
if (rb->count == 0) /* unrequest */
|
|
goto out;
|
|
gspca_dev->memory = rb->memory;
|
|
ret = frame_alloc(gspca_dev, rb->count);
|
|
if (ret == 0) {
|
|
rb->count = gspca_dev->nframes;
|
|
gspca_dev->capt_file = file;
|
|
}
|
|
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 = priv;
|
|
struct gspca_frame *frame;
|
|
|
|
if (v4l2_buf->index < 0
|
|
|| v4l2_buf->index >= gspca_dev->nframes)
|
|
return -EINVAL;
|
|
|
|
frame = &gspca_dev->frame[v4l2_buf->index];
|
|
memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_streamon(struct file *file, void *priv,
|
|
enum v4l2_buf_type buf_type)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
int ret;
|
|
|
|
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
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;
|
|
}
|
|
#ifdef GSPCA_DEBUG
|
|
if (gspca_debug & D_STREAM) {
|
|
PDEBUG_MODE("stream on OK",
|
|
gspca_dev->pixfmt,
|
|
gspca_dev->width,
|
|
gspca_dev->height);
|
|
}
|
|
#endif
|
|
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 = priv;
|
|
int i, ret;
|
|
|
|
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
if (!gspca_dev->streaming)
|
|
return 0;
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
/* stop streaming */
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
|
|
ret = -ERESTARTSYS;
|
|
goto out;
|
|
}
|
|
gspca_stream_off(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
|
|
/* empty the application queues */
|
|
for (i = 0; i < gspca_dev->nframes; i++)
|
|
gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
|
|
gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
|
|
gspca_dev->last_packet_type = DISCARD_PACKET;
|
|
gspca_dev->sequence = 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 = priv;
|
|
int ret;
|
|
|
|
if (!gspca_dev->sd_desc->get_jcomp)
|
|
return -EINVAL;
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vidioc_s_jpegcomp(struct file *file, void *priv,
|
|
struct v4l2_jpegcompression *jpegcomp)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
int ret;
|
|
|
|
if (!gspca_dev->sd_desc->set_jcomp)
|
|
return -EINVAL;
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int vidioc_g_parm(struct file *filp, void *priv,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
|
|
parm->parm.capture.readbuffers = gspca_dev->nbufread;
|
|
|
|
if (gspca_dev->sd_desc->get_streamparm) {
|
|
int ret;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
|
|
parm);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_parm(struct file *filp, void *priv,
|
|
struct v4l2_streamparm *parm)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
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) {
|
|
int ret;
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->usb_lock))
|
|
return -ERESTARTSYS;
|
|
if (gspca_dev->present)
|
|
ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
|
|
parm);
|
|
else
|
|
ret = -ENODEV;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_VIDEO_V4L1_COMPAT
|
|
static int vidiocgmbuf(struct file *file, void *priv,
|
|
struct video_mbuf *mbuf)
|
|
{
|
|
struct gspca_dev *gspca_dev = file->private_data;
|
|
int i;
|
|
|
|
PDEBUG(D_STREAM, "cgmbuf");
|
|
if (gspca_dev->nframes == 0) {
|
|
int ret;
|
|
|
|
{
|
|
struct v4l2_format fmt;
|
|
|
|
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
i = gspca_dev->cam.nmodes - 1; /* highest mode */
|
|
fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
|
|
fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height;
|
|
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
|
|
ret = vidioc_s_fmt_vid_cap(file, priv, &fmt);
|
|
if (ret != 0)
|
|
return ret;
|
|
}
|
|
{
|
|
struct v4l2_requestbuffers rb;
|
|
|
|
memset(&rb, 0, sizeof rb);
|
|
rb.count = 4;
|
|
rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
rb.memory = V4L2_MEMORY_MMAP;
|
|
ret = vidioc_reqbufs(file, priv, &rb);
|
|
if (ret != 0)
|
|
return ret;
|
|
}
|
|
}
|
|
mbuf->frames = gspca_dev->nframes;
|
|
mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
|
|
for (i = 0; i < mbuf->frames; i++)
|
|
mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int dev_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct gspca_dev *gspca_dev = file->private_data;
|
|
struct gspca_frame *frame;
|
|
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->present) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
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;
|
|
}
|
|
#ifdef CONFIG_VIDEO_V4L1_COMPAT
|
|
/* v4l1 maps all the buffers */
|
|
if (i != 0
|
|
|| size != frame->v4l2_buf.length * gspca_dev->nframes)
|
|
#endif
|
|
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 = (struct vm_operations_struct *) &gspca_vm_ops;
|
|
vma->vm_private_data = frame;
|
|
gspca_vm_open(vma);
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* wait for a video frame
|
|
*
|
|
* If a frame is ready, its index is returned.
|
|
*/
|
|
static int frame_wait(struct gspca_dev *gspca_dev,
|
|
int nonblock_ing)
|
|
{
|
|
struct gspca_frame *frame;
|
|
int i, j, ret;
|
|
|
|
/* check if a frame is ready */
|
|
i = gspca_dev->fr_o;
|
|
j = gspca_dev->fr_queue[i];
|
|
frame = &gspca_dev->frame[j];
|
|
|
|
if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) {
|
|
if (nonblock_ing)
|
|
return -EAGAIN;
|
|
|
|
/* wait till a frame is ready */
|
|
ret = wait_event_interruptible_timeout(gspca_dev->wq,
|
|
(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) ||
|
|
!gspca_dev->streaming || !gspca_dev->present,
|
|
msecs_to_jiffies(3000));
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
|
|
return -EIO;
|
|
}
|
|
|
|
gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
|
|
PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
|
|
gspca_dev->fr_q,
|
|
gspca_dev->fr_i,
|
|
gspca_dev->fr_o);
|
|
|
|
if (gspca_dev->sd_desc->dq_callback) {
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
if (gspca_dev->present)
|
|
gspca_dev->sd_desc->dq_callback(gspca_dev);
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
}
|
|
return j;
|
|
}
|
|
|
|
/*
|
|
* dequeue a video buffer
|
|
*
|
|
* If nonblock_ing is false, block until a buffer is available.
|
|
*/
|
|
static int vidioc_dqbuf(struct file *file, void *priv,
|
|
struct v4l2_buffer *v4l2_buf)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
struct gspca_frame *frame;
|
|
int i, ret;
|
|
|
|
PDEBUG(D_FRAM, "dqbuf");
|
|
if (v4l2_buf->memory != gspca_dev->memory)
|
|
return -EINVAL;
|
|
|
|
if (!gspca_dev->present)
|
|
return -ENODEV;
|
|
|
|
/* if not streaming, be sure the application will not loop forever */
|
|
if (!(file->f_flags & O_NONBLOCK)
|
|
&& !gspca_dev->streaming && gspca_dev->users == 1)
|
|
return -EINVAL;
|
|
|
|
/* only the capturing file may dequeue */
|
|
if (gspca_dev->capt_file != file)
|
|
return -EINVAL;
|
|
|
|
/* only one dequeue / read at a time */
|
|
if (mutex_lock_interruptible(&gspca_dev->read_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
|
|
if (ret < 0)
|
|
goto out;
|
|
i = ret; /* frame index */
|
|
frame = &gspca_dev->frame[i];
|
|
if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
|
|
if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
|
|
frame->data,
|
|
frame->v4l2_buf.bytesused)) {
|
|
PDEBUG(D_ERR|D_STREAM,
|
|
"dqbuf cp to user failed");
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
}
|
|
frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
|
|
memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
|
|
PDEBUG(D_FRAM, "dqbuf %d", i);
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->read_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* queue a video buffer
|
|
*
|
|
* Attempting to queue a buffer that has already been
|
|
* queued will return -EINVAL.
|
|
*/
|
|
static int vidioc_qbuf(struct file *file, void *priv,
|
|
struct v4l2_buffer *v4l2_buf)
|
|
{
|
|
struct gspca_dev *gspca_dev = priv;
|
|
struct gspca_frame *frame;
|
|
int i, index, ret;
|
|
|
|
PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
|
|
|
|
if (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 = gspca_dev->fr_q;
|
|
gspca_dev->fr_queue[i] = index;
|
|
gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
|
|
PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
|
|
gspca_dev->fr_q,
|
|
gspca_dev->fr_i,
|
|
gspca_dev->fr_o);
|
|
|
|
v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
|
|
v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 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 (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);
|
|
return ret;
|
|
}
|
|
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);
|
|
return ret;
|
|
}
|
|
}
|
|
gspca_dev->memory = GSPCA_MEMORY_READ;
|
|
}
|
|
|
|
/* start streaming */
|
|
ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
|
|
if (ret != 0)
|
|
PDEBUG(D_STREAM, "read streamon err %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
static unsigned int dev_poll(struct file *file, poll_table *wait)
|
|
{
|
|
struct gspca_dev *gspca_dev = file->private_data;
|
|
int i, ret;
|
|
|
|
PDEBUG(D_FRAM, "poll");
|
|
|
|
poll_wait(file, &gspca_dev->wq, wait);
|
|
|
|
/* if reqbufs is not done, the user would use read() */
|
|
if (gspca_dev->nframes == 0) {
|
|
if (gspca_dev->memory != GSPCA_MEMORY_NO)
|
|
return POLLERR; /* not the 1st time */
|
|
ret = read_alloc(gspca_dev, file);
|
|
if (ret != 0)
|
|
return POLLERR;
|
|
}
|
|
|
|
if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
|
|
return POLLERR;
|
|
|
|
/* check the next incoming buffer */
|
|
i = gspca_dev->fr_o;
|
|
i = gspca_dev->fr_queue[i];
|
|
if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
|
|
ret = POLLIN | POLLRDNORM; /* something to read */
|
|
else
|
|
ret = 0;
|
|
mutex_unlock(&gspca_dev->queue_lock);
|
|
if (!gspca_dev->present)
|
|
return 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 = file->private_data;
|
|
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->present)
|
|
return -ENODEV;
|
|
switch (gspca_dev->memory) {
|
|
case GSPCA_MEMORY_NO: /* first time */
|
|
ret = read_alloc(gspca_dev, file);
|
|
if (ret != 0)
|
|
return ret;
|
|
break;
|
|
case GSPCA_MEMORY_READ:
|
|
if (gspca_dev->capt_file == file)
|
|
break;
|
|
/* fall thru */
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* get a frame */
|
|
jiffies_to_timeval(get_jiffies_64(), ×tamp);
|
|
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) {
|
|
PDEBUG(D_ERR|D_STREAM,
|
|
"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_queryctrl = vidioc_queryctrl,
|
|
.vidioc_g_ctrl = vidioc_g_ctrl,
|
|
.vidioc_s_ctrl = vidioc_s_ctrl,
|
|
.vidioc_g_audio = vidioc_g_audio,
|
|
.vidioc_s_audio = vidioc_s_audio,
|
|
.vidioc_enumaudio = vidioc_enumaudio,
|
|
.vidioc_querymenu = vidioc_querymenu,
|
|
.vidioc_enum_input = vidioc_enum_input,
|
|
.vidioc_g_input = vidioc_g_input,
|
|
.vidioc_s_input = vidioc_s_input,
|
|
.vidioc_reqbufs = vidioc_reqbufs,
|
|
.vidioc_querybuf = vidioc_querybuf,
|
|
.vidioc_streamoff = vidioc_streamoff,
|
|
.vidioc_g_jpegcomp = vidioc_g_jpegcomp,
|
|
.vidioc_s_jpegcomp = vidioc_s_jpegcomp,
|
|
.vidioc_g_parm = vidioc_g_parm,
|
|
.vidioc_s_parm = vidioc_s_parm,
|
|
.vidioc_enum_framesizes = vidioc_enum_framesizes,
|
|
#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,
|
|
#ifdef CONFIG_VIDEO_V4L1_COMPAT
|
|
.vidiocgmbuf = vidiocgmbuf,
|
|
#endif
|
|
};
|
|
|
|
static struct video_device gspca_template = {
|
|
.name = "gspca main driver",
|
|
.fops = &dev_fops,
|
|
.ioctl_ops = &dev_ioctl_ops,
|
|
.release = gspca_release,
|
|
.minor = -1,
|
|
};
|
|
|
|
/*
|
|
* probe and create a new gspca device
|
|
*
|
|
* This function must be called by the sub-driver when it is
|
|
* called for probing a new device.
|
|
*/
|
|
int gspca_dev_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id,
|
|
const struct sd_desc *sd_desc,
|
|
int dev_size,
|
|
struct module *module)
|
|
{
|
|
struct usb_interface_descriptor *interface;
|
|
struct gspca_dev *gspca_dev;
|
|
struct usb_device *dev = interface_to_usbdev(intf);
|
|
int ret;
|
|
|
|
PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
|
|
|
|
/* we don't handle multi-config cameras */
|
|
if (dev->descriptor.bNumConfigurations != 1) {
|
|
PDEBUG(D_ERR, "Too many config");
|
|
return -ENODEV;
|
|
}
|
|
interface = &intf->cur_altsetting->desc;
|
|
if (interface->bInterfaceNumber > 0) {
|
|
PDEBUG(D_ERR, "intf != 0");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* create the device */
|
|
if (dev_size < sizeof *gspca_dev)
|
|
dev_size = sizeof *gspca_dev;
|
|
gspca_dev = kzalloc(dev_size, GFP_KERNEL);
|
|
if (!gspca_dev) {
|
|
err("couldn't kzalloc gspca struct");
|
|
return -ENOMEM;
|
|
}
|
|
gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
|
|
if (!gspca_dev->usb_buf) {
|
|
err("out of memory");
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
gspca_dev->dev = dev;
|
|
gspca_dev->iface = interface->bInterfaceNumber;
|
|
gspca_dev->nbalt = intf->num_altsetting;
|
|
gspca_dev->sd_desc = sd_desc;
|
|
gspca_dev->nbufread = 2;
|
|
gspca_dev->empty_packet = -1; /* don't check the empty packets */
|
|
|
|
/* 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;
|
|
ret = gspca_set_alt0(gspca_dev);
|
|
if (ret < 0)
|
|
goto out;
|
|
gspca_set_default_mode(gspca_dev);
|
|
|
|
mutex_init(&gspca_dev->usb_lock);
|
|
mutex_init(&gspca_dev->read_lock);
|
|
mutex_init(&gspca_dev->queue_lock);
|
|
init_waitqueue_head(&gspca_dev->wq);
|
|
|
|
/* init video stuff */
|
|
memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
|
|
gspca_dev->vdev.parent = &intf->dev;
|
|
gspca_dev->module = module;
|
|
gspca_dev->present = 1;
|
|
ret = video_register_device(&gspca_dev->vdev,
|
|
VFL_TYPE_GRABBER,
|
|
-1);
|
|
if (ret < 0) {
|
|
err("video_register_device err %d", ret);
|
|
goto out;
|
|
}
|
|
|
|
usb_set_intfdata(intf, gspca_dev);
|
|
PDEBUG(D_PROBE, "/dev/video%d created", gspca_dev->vdev.num);
|
|
return 0;
|
|
out:
|
|
kfree(gspca_dev->usb_buf);
|
|
kfree(gspca_dev);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(gspca_dev_probe);
|
|
|
|
/*
|
|
* USB disconnection
|
|
*
|
|
* This function must be called by the sub-driver
|
|
* when the device disconnects, after the specific resources are freed.
|
|
*/
|
|
void gspca_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
|
|
|
|
PDEBUG(D_PROBE, "/dev/video%d disconnect", gspca_dev->vdev.num);
|
|
mutex_lock(&gspca_dev->usb_lock);
|
|
gspca_dev->present = 0;
|
|
|
|
if (gspca_dev->streaming) {
|
|
destroy_urbs(gspca_dev);
|
|
wake_up_interruptible(&gspca_dev->wq);
|
|
}
|
|
|
|
/* the device is freed at exit of this function */
|
|
gspca_dev->dev = NULL;
|
|
mutex_unlock(&gspca_dev->usb_lock);
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
|
|
/* release the device */
|
|
/* (this will call gspca_release() immediatly or on last close) */
|
|
video_unregister_device(&gspca_dev->vdev);
|
|
|
|
/* PDEBUG(D_PROBE, "disconnect complete"); */
|
|
}
|
|
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);
|
|
|
|
if (!gspca_dev->streaming)
|
|
return 0;
|
|
gspca_dev->frozen = 1; /* avoid urb error messages */
|
|
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);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gspca_suspend);
|
|
|
|
int gspca_resume(struct usb_interface *intf)
|
|
{
|
|
struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
|
|
|
|
gspca_dev->frozen = 0;
|
|
gspca_dev->sd_desc->init(gspca_dev);
|
|
if (gspca_dev->streaming)
|
|
return gspca_init_transfer(gspca_dev);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gspca_resume);
|
|
#endif
|
|
/* -- cam driver utility functions -- */
|
|
|
|
/* auto gain and exposure algorithm based on the knee algorithm described here:
|
|
http://ytse.tricolour.net/docs/LowLightOptimization.html
|
|
|
|
Returns 0 if no changes were made, 1 if the gain and or exposure settings
|
|
where changed. */
|
|
int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
|
|
int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
|
|
{
|
|
int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
|
|
const struct ctrl *gain_ctrl = NULL;
|
|
const struct ctrl *exposure_ctrl = NULL;
|
|
const struct ctrl *autogain_ctrl = NULL;
|
|
int retval = 0;
|
|
|
|
for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
|
|
if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
|
|
gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
|
|
if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
|
|
exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
|
|
if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
|
|
autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
|
|
}
|
|
if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
|
|
PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
|
|
"on cam without (auto)gain/exposure");
|
|
return 0;
|
|
}
|
|
|
|
if (gain_ctrl->get(gspca_dev, &gain) ||
|
|
exposure_ctrl->get(gspca_dev, &exposure) ||
|
|
autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
|
|
return 0;
|
|
|
|
orig_gain = gain;
|
|
orig_exposure = exposure;
|
|
|
|
/* If we are of a multiple of deadzone, do multiple steps to reach the
|
|
desired lumination fast (with the risc of a slight overshoot) */
|
|
steps = abs(desired_avg_lum - avg_lum) / deadzone;
|
|
|
|
PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
|
|
avg_lum, desired_avg_lum, steps);
|
|
|
|
for (i = 0; i < steps; i++) {
|
|
if (avg_lum > desired_avg_lum) {
|
|
if (gain > gain_knee)
|
|
gain--;
|
|
else if (exposure > exposure_knee)
|
|
exposure--;
|
|
else if (gain > gain_ctrl->qctrl.default_value)
|
|
gain--;
|
|
else if (exposure > exposure_ctrl->qctrl.minimum)
|
|
exposure--;
|
|
else if (gain > gain_ctrl->qctrl.minimum)
|
|
gain--;
|
|
else
|
|
break;
|
|
} else {
|
|
if (gain < gain_ctrl->qctrl.default_value)
|
|
gain++;
|
|
else if (exposure < exposure_knee)
|
|
exposure++;
|
|
else if (gain < gain_knee)
|
|
gain++;
|
|
else if (exposure < exposure_ctrl->qctrl.maximum)
|
|
exposure++;
|
|
else if (gain < gain_ctrl->qctrl.maximum)
|
|
gain++;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (gain != orig_gain) {
|
|
gain_ctrl->set(gspca_dev, gain);
|
|
retval = 1;
|
|
}
|
|
if (exposure != orig_exposure) {
|
|
exposure_ctrl->set(gspca_dev, exposure);
|
|
retval = 1;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
|
|
|
|
/* -- module insert / remove -- */
|
|
static int __init gspca_init(void)
|
|
{
|
|
info("main v%d.%d.%d registered",
|
|
(DRIVER_VERSION_NUMBER >> 16) & 0xff,
|
|
(DRIVER_VERSION_NUMBER >> 8) & 0xff,
|
|
DRIVER_VERSION_NUMBER & 0xff);
|
|
return 0;
|
|
}
|
|
static void __exit gspca_exit(void)
|
|
{
|
|
info("main deregistered");
|
|
}
|
|
|
|
module_init(gspca_init);
|
|
module_exit(gspca_exit);
|
|
|
|
#ifdef GSPCA_DEBUG
|
|
module_param_named(debug, gspca_debug, int, 0644);
|
|
MODULE_PARM_DESC(debug,
|
|
"Debug (bit) 0x01:error 0x02:probe 0x04:config"
|
|
" 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
|
|
" 0x0100: v4l2");
|
|
#endif
|