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069b747931
Since internal to v4l2 the ioctl prototype is the same regardless of it being called through .ioctl or .unlocked_ioctl, we need to convert it all to the long return type of unlocked_ioctl. Thanks to Jean-Francois Moine for posting an initial patch for this and thus bringing it to our attention. Cc: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2091 lines
49 KiB
C
2091 lines
49 KiB
C
/***************************************************************************
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* Video4Linux2 driver for ZC0301[P] Image Processor and Control Chip *
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* *
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* Copyright (C) 2006-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
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* *
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* Informations about the chip internals needed to enable the I2C protocol *
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* have been taken from the documentation of the ZC030x Video4Linux1 *
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* driver written by Andrew Birkett <andy@nobugs.org> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License 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 *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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***************************************************************************/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/fs.h>
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#include <linux/delay.h>
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#include <linux/compiler.h>
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#include <linux/ioctl.h>
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#include <linux/poll.h>
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#include <linux/stat.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/page-flags.h>
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#include <asm/byteorder.h>
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#include <asm/page.h>
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#include <asm/uaccess.h>
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#include "zc0301.h"
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/*****************************************************************************/
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#define ZC0301_MODULE_NAME "V4L2 driver for ZC0301[P] " \
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"Image Processor and Control Chip"
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#define ZC0301_MODULE_AUTHOR "(C) 2006-2007 Luca Risolia"
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#define ZC0301_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
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#define ZC0301_MODULE_LICENSE "GPL"
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#define ZC0301_MODULE_VERSION "1:1.10"
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#define ZC0301_MODULE_VERSION_CODE KERNEL_VERSION(1, 1, 10)
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/*****************************************************************************/
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MODULE_DEVICE_TABLE(usb, zc0301_id_table);
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MODULE_AUTHOR(ZC0301_MODULE_AUTHOR " " ZC0301_AUTHOR_EMAIL);
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MODULE_DESCRIPTION(ZC0301_MODULE_NAME);
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MODULE_VERSION(ZC0301_MODULE_VERSION);
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MODULE_LICENSE(ZC0301_MODULE_LICENSE);
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static short video_nr[] = {[0 ... ZC0301_MAX_DEVICES-1] = -1};
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module_param_array(video_nr, short, NULL, 0444);
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MODULE_PARM_DESC(video_nr,
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"\n<-1|n[,...]> Specify V4L2 minor mode number."
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"\n -1 = use next available (default)"
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"\n n = use minor number n (integer >= 0)"
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"\nYou can specify up to "
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__MODULE_STRING(ZC0301_MAX_DEVICES) " cameras this way."
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"\nFor example:"
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"\nvideo_nr=-1,2,-1 would assign minor number 2 to"
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"\nthe second registered camera and use auto for the first"
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"\none and for every other camera."
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"\n");
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static short force_munmap[] = {[0 ... ZC0301_MAX_DEVICES-1] =
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ZC0301_FORCE_MUNMAP};
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module_param_array(force_munmap, bool, NULL, 0444);
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MODULE_PARM_DESC(force_munmap,
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"\n<0|1[,...]> Force the application to unmap previously"
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"\nmapped buffer memory before calling any VIDIOC_S_CROP or"
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"\nVIDIOC_S_FMT ioctl's. Not all the applications support"
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"\nthis feature. This parameter is specific for each"
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"\ndetected camera."
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"\n 0 = do not force memory unmapping"
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"\n 1 = force memory unmapping (save memory)"
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"\nDefault value is "__MODULE_STRING(ZC0301_FORCE_MUNMAP)"."
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"\n");
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static unsigned int frame_timeout[] = {[0 ... ZC0301_MAX_DEVICES-1] =
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ZC0301_FRAME_TIMEOUT};
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module_param_array(frame_timeout, uint, NULL, 0644);
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MODULE_PARM_DESC(frame_timeout,
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"\n<n[,...]> Timeout for a video frame in seconds."
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"\nThis parameter is specific for each detected camera."
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"\nDefault value is "__MODULE_STRING(ZC0301_FRAME_TIMEOUT)"."
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"\n");
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#ifdef ZC0301_DEBUG
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static unsigned short debug = ZC0301_DEBUG_LEVEL;
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module_param(debug, ushort, 0644);
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MODULE_PARM_DESC(debug,
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"\n<n> Debugging information level, from 0 to 3:"
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"\n0 = none (use carefully)"
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"\n1 = critical errors"
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"\n2 = significant informations"
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"\n3 = more verbose messages"
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"\nLevel 3 is useful for testing only, when only "
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"one device is used."
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"\nDefault value is "__MODULE_STRING(ZC0301_DEBUG_LEVEL)"."
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"\n");
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#endif
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/*****************************************************************************/
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static u32
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zc0301_request_buffers(struct zc0301_device* cam, u32 count,
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enum zc0301_io_method io)
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{
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struct v4l2_pix_format* p = &(cam->sensor.pix_format);
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struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
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const size_t imagesize = cam->module_param.force_munmap ||
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io == IO_READ ?
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(p->width * p->height * p->priv) / 8 :
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(r->width * r->height * p->priv) / 8;
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void* buff = NULL;
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u32 i;
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if (count > ZC0301_MAX_FRAMES)
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count = ZC0301_MAX_FRAMES;
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cam->nbuffers = count;
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while (cam->nbuffers > 0) {
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if ((buff = vmalloc_32_user(cam->nbuffers *
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PAGE_ALIGN(imagesize))))
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break;
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cam->nbuffers--;
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}
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for (i = 0; i < cam->nbuffers; i++) {
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cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
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cam->frame[i].buf.index = i;
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cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
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cam->frame[i].buf.length = imagesize;
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cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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cam->frame[i].buf.sequence = 0;
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cam->frame[i].buf.field = V4L2_FIELD_NONE;
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cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
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cam->frame[i].buf.flags = 0;
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}
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return cam->nbuffers;
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}
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static void zc0301_release_buffers(struct zc0301_device* cam)
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{
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if (cam->nbuffers) {
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vfree(cam->frame[0].bufmem);
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cam->nbuffers = 0;
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}
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cam->frame_current = NULL;
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}
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static void zc0301_empty_framequeues(struct zc0301_device* cam)
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{
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u32 i;
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INIT_LIST_HEAD(&cam->inqueue);
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INIT_LIST_HEAD(&cam->outqueue);
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for (i = 0; i < ZC0301_MAX_FRAMES; i++) {
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cam->frame[i].state = F_UNUSED;
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cam->frame[i].buf.bytesused = 0;
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}
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}
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static void zc0301_requeue_outqueue(struct zc0301_device* cam)
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{
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struct zc0301_frame_t *i;
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list_for_each_entry(i, &cam->outqueue, frame) {
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i->state = F_QUEUED;
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list_add(&i->frame, &cam->inqueue);
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}
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INIT_LIST_HEAD(&cam->outqueue);
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}
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static void zc0301_queue_unusedframes(struct zc0301_device* cam)
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{
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unsigned long lock_flags;
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u32 i;
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for (i = 0; i < cam->nbuffers; i++)
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if (cam->frame[i].state == F_UNUSED) {
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cam->frame[i].state = F_QUEUED;
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spin_lock_irqsave(&cam->queue_lock, lock_flags);
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list_add_tail(&cam->frame[i].frame, &cam->inqueue);
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spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
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}
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}
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/*****************************************************************************/
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int zc0301_write_reg(struct zc0301_device* cam, u16 index, u16 value)
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{
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struct usb_device* udev = cam->usbdev;
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int res;
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res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0xa0, 0x40,
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value, index, NULL, 0, ZC0301_CTRL_TIMEOUT);
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if (res < 0) {
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DBG(3, "Failed to write a register (index 0x%04X, "
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"value 0x%02X, error %d)",index, value, res);
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return -1;
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}
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return 0;
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}
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int zc0301_read_reg(struct zc0301_device* cam, u16 index)
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{
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struct usb_device* udev = cam->usbdev;
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u8* buff = cam->control_buffer;
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int res;
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res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0xa1, 0xc0,
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0x0001, index, buff, 1, ZC0301_CTRL_TIMEOUT);
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if (res < 0)
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DBG(3, "Failed to read a register (index 0x%04X, error %d)",
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index, res);
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PDBGG("Read: index 0x%04X, value: 0x%04X", index, (int)(*buff));
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return (res >= 0) ? (int)(*buff) : -1;
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}
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int zc0301_i2c_read(struct zc0301_device* cam, u16 address, u8 length)
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{
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int err = 0, res, r0, r1;
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err += zc0301_write_reg(cam, 0x0092, address);
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err += zc0301_write_reg(cam, 0x0090, 0x02);
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msleep(1);
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res = zc0301_read_reg(cam, 0x0091);
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if (res < 0)
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err += res;
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r0 = zc0301_read_reg(cam, 0x0095);
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if (r0 < 0)
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err += r0;
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r1 = zc0301_read_reg(cam, 0x0096);
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if (r1 < 0)
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err += r1;
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res = (length <= 1) ? r0 : r0 | (r1 << 8);
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if (err)
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DBG(3, "I2C read failed at address 0x%04X, value: 0x%04X",
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address, res);
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PDBGG("I2C read: address 0x%04X, value: 0x%04X", address, res);
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return err ? -1 : res;
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}
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int zc0301_i2c_write(struct zc0301_device* cam, u16 address, u16 value)
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{
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int err = 0, res;
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err += zc0301_write_reg(cam, 0x0092, address);
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err += zc0301_write_reg(cam, 0x0093, value & 0xff);
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err += zc0301_write_reg(cam, 0x0094, value >> 8);
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err += zc0301_write_reg(cam, 0x0090, 0x01);
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msleep(1);
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res = zc0301_read_reg(cam, 0x0091);
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if (res < 0)
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err += res;
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if (err)
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DBG(3, "I2C write failed at address 0x%04X, value: 0x%04X",
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address, value);
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PDBGG("I2C write: address 0x%04X, value: 0x%04X", address, value);
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return err ? -1 : 0;
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}
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/*****************************************************************************/
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static void zc0301_urb_complete(struct urb *urb)
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{
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struct zc0301_device* cam = urb->context;
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struct zc0301_frame_t** f;
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size_t imagesize;
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u8 i;
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int err = 0;
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if (urb->status == -ENOENT)
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return;
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f = &cam->frame_current;
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if (cam->stream == STREAM_INTERRUPT) {
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cam->stream = STREAM_OFF;
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if ((*f))
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(*f)->state = F_QUEUED;
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DBG(3, "Stream interrupted");
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wake_up(&cam->wait_stream);
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}
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if (cam->state & DEV_DISCONNECTED)
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return;
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if (cam->state & DEV_MISCONFIGURED) {
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wake_up_interruptible(&cam->wait_frame);
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return;
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}
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if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
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goto resubmit_urb;
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if (!(*f))
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(*f) = list_entry(cam->inqueue.next, struct zc0301_frame_t,
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frame);
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imagesize = (cam->sensor.pix_format.width *
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cam->sensor.pix_format.height *
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cam->sensor.pix_format.priv) / 8;
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for (i = 0; i < urb->number_of_packets; i++) {
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unsigned int len, status;
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void *pos;
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u16* soi;
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u8 sof;
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len = urb->iso_frame_desc[i].actual_length;
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status = urb->iso_frame_desc[i].status;
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pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
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if (status) {
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DBG(3, "Error in isochronous frame");
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(*f)->state = F_ERROR;
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continue;
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}
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sof = (*(soi = pos) == 0xd8ff);
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PDBGG("Isochrnous frame: length %u, #%u i,", len, i);
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if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
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start_of_frame:
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if (sof) {
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(*f)->state = F_GRABBING;
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(*f)->buf.bytesused = 0;
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do_gettimeofday(&(*f)->buf.timestamp);
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DBG(3, "SOF detected: new video frame");
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}
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if ((*f)->state == F_GRABBING) {
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if (sof && (*f)->buf.bytesused)
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goto end_of_frame;
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if ((*f)->buf.bytesused + len > imagesize) {
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DBG(3, "Video frame size exceeded");
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(*f)->state = F_ERROR;
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continue;
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}
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memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, len);
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(*f)->buf.bytesused += len;
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if ((*f)->buf.bytesused == imagesize) {
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u32 b;
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end_of_frame:
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b = (*f)->buf.bytesused;
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(*f)->state = F_DONE;
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(*f)->buf.sequence= ++cam->frame_count;
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spin_lock(&cam->queue_lock);
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list_move_tail(&(*f)->frame, &cam->outqueue);
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if (!list_empty(&cam->inqueue))
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(*f) = list_entry(cam->inqueue.next,
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struct zc0301_frame_t,
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frame);
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else
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(*f) = NULL;
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spin_unlock(&cam->queue_lock);
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DBG(3, "Video frame captured: : %lu bytes",
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(unsigned long)(b));
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if (!(*f))
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goto resubmit_urb;
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if (sof)
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goto start_of_frame;
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}
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}
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}
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resubmit_urb:
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urb->dev = cam->usbdev;
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err < 0 && err != -EPERM) {
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cam->state |= DEV_MISCONFIGURED;
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DBG(1, "usb_submit_urb() failed");
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}
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wake_up_interruptible(&cam->wait_frame);
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}
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|
|
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static int zc0301_start_transfer(struct zc0301_device* cam)
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{
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struct usb_device *udev = cam->usbdev;
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struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
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usb_ifnum_to_if(udev, 0),
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ZC0301_ALTERNATE_SETTING);
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const unsigned int psz = le16_to_cpu(altsetting->
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endpoint[0].desc.wMaxPacketSize);
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struct urb* urb;
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s8 i, j;
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int err = 0;
|
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|
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for (i = 0; i < ZC0301_URBS; i++) {
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cam->transfer_buffer[i] = kzalloc(ZC0301_ISO_PACKETS * psz,
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GFP_KERNEL);
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if (!cam->transfer_buffer[i]) {
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err = -ENOMEM;
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DBG(1, "Not enough memory");
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goto free_buffers;
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}
|
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}
|
|
|
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for (i = 0; i < ZC0301_URBS; i++) {
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urb = usb_alloc_urb(ZC0301_ISO_PACKETS, GFP_KERNEL);
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cam->urb[i] = urb;
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if (!urb) {
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err = -ENOMEM;
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DBG(1, "usb_alloc_urb() failed");
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goto free_urbs;
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}
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urb->dev = udev;
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urb->context = cam;
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urb->pipe = usb_rcvisocpipe(udev, 1);
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urb->transfer_flags = URB_ISO_ASAP;
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urb->number_of_packets = ZC0301_ISO_PACKETS;
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urb->complete = zc0301_urb_complete;
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urb->transfer_buffer = cam->transfer_buffer[i];
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urb->transfer_buffer_length = psz * ZC0301_ISO_PACKETS;
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urb->interval = 1;
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for (j = 0; j < ZC0301_ISO_PACKETS; j++) {
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urb->iso_frame_desc[j].offset = psz * j;
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urb->iso_frame_desc[j].length = psz;
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}
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}
|
|
|
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err = usb_set_interface(udev, 0, ZC0301_ALTERNATE_SETTING);
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if (err) {
|
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DBG(1, "usb_set_interface() failed");
|
|
goto free_urbs;
|
|
}
|
|
|
|
cam->frame_current = NULL;
|
|
|
|
for (i = 0; i < ZC0301_URBS; i++) {
|
|
err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
|
|
if (err) {
|
|
for (j = i-1; j >= 0; j--)
|
|
usb_kill_urb(cam->urb[j]);
|
|
DBG(1, "usb_submit_urb() failed, error %d", err);
|
|
goto free_urbs;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_urbs:
|
|
for (i = 0; (i < ZC0301_URBS) && cam->urb[i]; i++)
|
|
usb_free_urb(cam->urb[i]);
|
|
|
|
free_buffers:
|
|
for (i = 0; (i < ZC0301_URBS) && cam->transfer_buffer[i]; i++)
|
|
kfree(cam->transfer_buffer[i]);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static int zc0301_stop_transfer(struct zc0301_device* cam)
|
|
{
|
|
struct usb_device *udev = cam->usbdev;
|
|
s8 i;
|
|
int err = 0;
|
|
|
|
if (cam->state & DEV_DISCONNECTED)
|
|
return 0;
|
|
|
|
for (i = ZC0301_URBS-1; i >= 0; i--) {
|
|
usb_kill_urb(cam->urb[i]);
|
|
usb_free_urb(cam->urb[i]);
|
|
kfree(cam->transfer_buffer[i]);
|
|
}
|
|
|
|
err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
|
|
if (err)
|
|
DBG(3, "usb_set_interface() failed");
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static int zc0301_stream_interrupt(struct zc0301_device* cam)
|
|
{
|
|
long timeout;
|
|
|
|
cam->stream = STREAM_INTERRUPT;
|
|
timeout = wait_event_timeout(cam->wait_stream,
|
|
(cam->stream == STREAM_OFF) ||
|
|
(cam->state & DEV_DISCONNECTED),
|
|
ZC0301_URB_TIMEOUT);
|
|
if (cam->state & DEV_DISCONNECTED)
|
|
return -ENODEV;
|
|
else if (cam->stream != STREAM_OFF) {
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
DBG(1, "URB timeout reached. The camera is misconfigured. To "
|
|
"use it, close and open /dev/video%d again.",
|
|
cam->v4ldev->num);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
static int
|
|
zc0301_set_compression(struct zc0301_device* cam,
|
|
struct v4l2_jpegcompression* compression)
|
|
{
|
|
int r, err = 0;
|
|
|
|
if ((r = zc0301_read_reg(cam, 0x0008)) < 0)
|
|
err += r;
|
|
err += zc0301_write_reg(cam, 0x0008, r | 0x11 | compression->quality);
|
|
|
|
return err ? -EIO : 0;
|
|
}
|
|
|
|
|
|
static int zc0301_init(struct zc0301_device* cam)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_control ctrl;
|
|
struct v4l2_queryctrl *qctrl;
|
|
struct v4l2_rect* rect;
|
|
u8 i = 0;
|
|
int err = 0;
|
|
|
|
if (!(cam->state & DEV_INITIALIZED)) {
|
|
mutex_init(&cam->open_mutex);
|
|
init_waitqueue_head(&cam->wait_open);
|
|
qctrl = s->qctrl;
|
|
rect = &(s->cropcap.defrect);
|
|
cam->compression.quality = ZC0301_COMPRESSION_QUALITY;
|
|
} else { /* use current values */
|
|
qctrl = s->_qctrl;
|
|
rect = &(s->_rect);
|
|
}
|
|
|
|
if (s->init) {
|
|
err = s->init(cam);
|
|
if (err) {
|
|
DBG(3, "Sensor initialization failed");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if ((err = zc0301_set_compression(cam, &cam->compression))) {
|
|
DBG(3, "set_compression() failed");
|
|
return err;
|
|
}
|
|
|
|
if (s->set_crop)
|
|
if ((err = s->set_crop(cam, rect))) {
|
|
DBG(3, "set_crop() failed");
|
|
return err;
|
|
}
|
|
|
|
if (s->set_ctrl) {
|
|
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
|
|
if (s->qctrl[i].id != 0 &&
|
|
!(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
|
|
ctrl.id = s->qctrl[i].id;
|
|
ctrl.value = qctrl[i].default_value;
|
|
err = s->set_ctrl(cam, &ctrl);
|
|
if (err) {
|
|
DBG(3, "Set %s control failed",
|
|
s->qctrl[i].name);
|
|
return err;
|
|
}
|
|
DBG(3, "Image sensor supports '%s' control",
|
|
s->qctrl[i].name);
|
|
}
|
|
}
|
|
|
|
if (!(cam->state & DEV_INITIALIZED)) {
|
|
mutex_init(&cam->fileop_mutex);
|
|
spin_lock_init(&cam->queue_lock);
|
|
init_waitqueue_head(&cam->wait_frame);
|
|
init_waitqueue_head(&cam->wait_stream);
|
|
cam->nreadbuffers = 2;
|
|
memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
|
|
memcpy(&(s->_rect), &(s->cropcap.defrect),
|
|
sizeof(struct v4l2_rect));
|
|
cam->state |= DEV_INITIALIZED;
|
|
}
|
|
|
|
DBG(2, "Initialization succeeded");
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
static void zc0301_release_resources(struct kref *kref)
|
|
{
|
|
struct zc0301_device *cam = container_of(kref, struct zc0301_device,
|
|
kref);
|
|
DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->num);
|
|
video_set_drvdata(cam->v4ldev, NULL);
|
|
video_unregister_device(cam->v4ldev);
|
|
usb_put_dev(cam->usbdev);
|
|
kfree(cam->control_buffer);
|
|
kfree(cam);
|
|
}
|
|
|
|
|
|
static int zc0301_open(struct file *filp)
|
|
{
|
|
struct zc0301_device* cam;
|
|
int err = 0;
|
|
|
|
if (!down_read_trylock(&zc0301_dev_lock))
|
|
return -EAGAIN;
|
|
|
|
cam = video_drvdata(filp);
|
|
|
|
if (wait_for_completion_interruptible(&cam->probe)) {
|
|
up_read(&zc0301_dev_lock);
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
kref_get(&cam->kref);
|
|
|
|
if (mutex_lock_interruptible(&cam->open_mutex)) {
|
|
kref_put(&cam->kref, zc0301_release_resources);
|
|
up_read(&zc0301_dev_lock);
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
DBG(1, "Device not present");
|
|
err = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (cam->users) {
|
|
DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->num);
|
|
DBG(3, "Simultaneous opens are not supported");
|
|
if ((filp->f_flags & O_NONBLOCK) ||
|
|
(filp->f_flags & O_NDELAY)) {
|
|
err = -EWOULDBLOCK;
|
|
goto out;
|
|
}
|
|
DBG(2, "A blocking open() has been requested. Wait for the "
|
|
"device to be released...");
|
|
up_read(&zc0301_dev_lock);
|
|
err = wait_event_interruptible_exclusive(cam->wait_open,
|
|
(cam->state & DEV_DISCONNECTED)
|
|
|| !cam->users);
|
|
down_read(&zc0301_dev_lock);
|
|
if (err)
|
|
goto out;
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
err = -ENODEV;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (cam->state & DEV_MISCONFIGURED) {
|
|
err = zc0301_init(cam);
|
|
if (err) {
|
|
DBG(1, "Initialization failed again. "
|
|
"I will retry on next open().");
|
|
goto out;
|
|
}
|
|
cam->state &= ~DEV_MISCONFIGURED;
|
|
}
|
|
|
|
if ((err = zc0301_start_transfer(cam)))
|
|
goto out;
|
|
|
|
filp->private_data = cam;
|
|
cam->users++;
|
|
cam->io = IO_NONE;
|
|
cam->stream = STREAM_OFF;
|
|
cam->nbuffers = 0;
|
|
cam->frame_count = 0;
|
|
zc0301_empty_framequeues(cam);
|
|
|
|
DBG(3, "Video device /dev/video%d is open", cam->v4ldev->num);
|
|
|
|
out:
|
|
mutex_unlock(&cam->open_mutex);
|
|
if (err)
|
|
kref_put(&cam->kref, zc0301_release_resources);
|
|
up_read(&zc0301_dev_lock);
|
|
return err;
|
|
}
|
|
|
|
|
|
static int zc0301_release(struct file *filp)
|
|
{
|
|
struct zc0301_device* cam;
|
|
|
|
down_write(&zc0301_dev_lock);
|
|
|
|
cam = video_drvdata(filp);
|
|
|
|
zc0301_stop_transfer(cam);
|
|
zc0301_release_buffers(cam);
|
|
cam->users--;
|
|
wake_up_interruptible_nr(&cam->wait_open, 1);
|
|
|
|
DBG(3, "Video device /dev/video%d closed", cam->v4ldev->num);
|
|
|
|
kref_put(&cam->kref, zc0301_release_resources);
|
|
|
|
up_write(&zc0301_dev_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static ssize_t
|
|
zc0301_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
|
|
{
|
|
struct zc0301_device *cam = video_drvdata(filp);
|
|
struct zc0301_frame_t* f, * i;
|
|
unsigned long lock_flags;
|
|
long timeout;
|
|
int err = 0;
|
|
|
|
if (mutex_lock_interruptible(&cam->fileop_mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
DBG(1, "Device not present");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (cam->state & DEV_MISCONFIGURED) {
|
|
DBG(1, "The camera is misconfigured. Close and open it "
|
|
"again.");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EIO;
|
|
}
|
|
|
|
if (cam->io == IO_MMAP) {
|
|
DBG(3, "Close and open the device again to choose the read "
|
|
"method");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (cam->io == IO_NONE) {
|
|
if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
|
|
DBG(1, "read() failed, not enough memory");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
cam->io = IO_READ;
|
|
cam->stream = STREAM_ON;
|
|
}
|
|
|
|
if (list_empty(&cam->inqueue)) {
|
|
if (!list_empty(&cam->outqueue))
|
|
zc0301_empty_framequeues(cam);
|
|
zc0301_queue_unusedframes(cam);
|
|
}
|
|
|
|
if (!count) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return 0;
|
|
}
|
|
|
|
if (list_empty(&cam->outqueue)) {
|
|
if (filp->f_flags & O_NONBLOCK) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EAGAIN;
|
|
}
|
|
timeout = wait_event_interruptible_timeout
|
|
( cam->wait_frame,
|
|
(!list_empty(&cam->outqueue)) ||
|
|
(cam->state & DEV_DISCONNECTED) ||
|
|
(cam->state & DEV_MISCONFIGURED),
|
|
cam->module_param.frame_timeout *
|
|
1000 * msecs_to_jiffies(1) );
|
|
if (timeout < 0) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return timeout;
|
|
}
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -ENODEV;
|
|
}
|
|
if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
f = list_entry(cam->outqueue.prev, struct zc0301_frame_t, frame);
|
|
|
|
if (count > f->buf.bytesused)
|
|
count = f->buf.bytesused;
|
|
|
|
if (copy_to_user(buf, f->bufmem, count)) {
|
|
err = -EFAULT;
|
|
goto exit;
|
|
}
|
|
*f_pos += count;
|
|
|
|
exit:
|
|
spin_lock_irqsave(&cam->queue_lock, lock_flags);
|
|
list_for_each_entry(i, &cam->outqueue, frame)
|
|
i->state = F_UNUSED;
|
|
INIT_LIST_HEAD(&cam->outqueue);
|
|
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
|
|
|
|
zc0301_queue_unusedframes(cam);
|
|
|
|
PDBGG("Frame #%lu, bytes read: %zu",
|
|
(unsigned long)f->buf.index, count);
|
|
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
|
|
return err ? err : count;
|
|
}
|
|
|
|
|
|
static unsigned int zc0301_poll(struct file *filp, poll_table *wait)
|
|
{
|
|
struct zc0301_device *cam = video_drvdata(filp);
|
|
struct zc0301_frame_t* f;
|
|
unsigned long lock_flags;
|
|
unsigned int mask = 0;
|
|
|
|
if (mutex_lock_interruptible(&cam->fileop_mutex))
|
|
return POLLERR;
|
|
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
DBG(1, "Device not present");
|
|
goto error;
|
|
}
|
|
|
|
if (cam->state & DEV_MISCONFIGURED) {
|
|
DBG(1, "The camera is misconfigured. Close and open it "
|
|
"again.");
|
|
goto error;
|
|
}
|
|
|
|
if (cam->io == IO_NONE) {
|
|
if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
|
|
DBG(1, "poll() failed, not enough memory");
|
|
goto error;
|
|
}
|
|
cam->io = IO_READ;
|
|
cam->stream = STREAM_ON;
|
|
}
|
|
|
|
if (cam->io == IO_READ) {
|
|
spin_lock_irqsave(&cam->queue_lock, lock_flags);
|
|
list_for_each_entry(f, &cam->outqueue, frame)
|
|
f->state = F_UNUSED;
|
|
INIT_LIST_HEAD(&cam->outqueue);
|
|
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
|
|
zc0301_queue_unusedframes(cam);
|
|
}
|
|
|
|
poll_wait(filp, &cam->wait_frame, wait);
|
|
|
|
if (!list_empty(&cam->outqueue))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
|
|
return mask;
|
|
|
|
error:
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return POLLERR;
|
|
}
|
|
|
|
|
|
static void zc0301_vm_open(struct vm_area_struct* vma)
|
|
{
|
|
struct zc0301_frame_t* f = vma->vm_private_data;
|
|
f->vma_use_count++;
|
|
}
|
|
|
|
|
|
static void zc0301_vm_close(struct vm_area_struct* vma)
|
|
{
|
|
/* NOTE: buffers are not freed here */
|
|
struct zc0301_frame_t* f = vma->vm_private_data;
|
|
f->vma_use_count--;
|
|
}
|
|
|
|
|
|
static struct vm_operations_struct zc0301_vm_ops = {
|
|
.open = zc0301_vm_open,
|
|
.close = zc0301_vm_close,
|
|
};
|
|
|
|
|
|
static int zc0301_mmap(struct file* filp, struct vm_area_struct *vma)
|
|
{
|
|
struct zc0301_device *cam = video_drvdata(filp);
|
|
unsigned long size = vma->vm_end - vma->vm_start,
|
|
start = vma->vm_start;
|
|
void *pos;
|
|
u32 i;
|
|
|
|
if (mutex_lock_interruptible(&cam->fileop_mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
DBG(1, "Device not present");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (cam->state & DEV_MISCONFIGURED) {
|
|
DBG(1, "The camera is misconfigured. Close and open it "
|
|
"again.");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EIO;
|
|
}
|
|
|
|
if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EACCES;
|
|
}
|
|
|
|
if (cam->io != IO_MMAP ||
|
|
size != PAGE_ALIGN(cam->frame[0].buf.length)) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < cam->nbuffers; i++) {
|
|
if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
|
|
break;
|
|
}
|
|
if (i == cam->nbuffers) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
vma->vm_flags |= VM_IO;
|
|
vma->vm_flags |= VM_RESERVED;
|
|
|
|
pos = cam->frame[i].bufmem;
|
|
while (size > 0) { /* size is page-aligned */
|
|
if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EAGAIN;
|
|
}
|
|
start += PAGE_SIZE;
|
|
pos += PAGE_SIZE;
|
|
size -= PAGE_SIZE;
|
|
}
|
|
|
|
vma->vm_ops = &zc0301_vm_ops;
|
|
vma->vm_private_data = &cam->frame[i];
|
|
zc0301_vm_open(vma);
|
|
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
static int
|
|
zc0301_vidioc_querycap(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_capability cap = {
|
|
.driver = "zc0301",
|
|
.version = ZC0301_MODULE_VERSION_CODE,
|
|
.capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
|
|
V4L2_CAP_STREAMING,
|
|
};
|
|
|
|
strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
|
|
if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
|
|
strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
|
|
sizeof(cap.bus_info));
|
|
|
|
if (copy_to_user(arg, &cap, sizeof(cap)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_enuminput(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_input i;
|
|
|
|
if (copy_from_user(&i, arg, sizeof(i)))
|
|
return -EFAULT;
|
|
|
|
if (i.index)
|
|
return -EINVAL;
|
|
|
|
memset(&i, 0, sizeof(i));
|
|
strcpy(i.name, "Camera");
|
|
i.type = V4L2_INPUT_TYPE_CAMERA;
|
|
|
|
if (copy_to_user(arg, &i, sizeof(i)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_g_input(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
int index = 0;
|
|
|
|
if (copy_to_user(arg, &index, sizeof(index)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_s_input(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
int index;
|
|
|
|
if (copy_from_user(&index, arg, sizeof(index)))
|
|
return -EFAULT;
|
|
|
|
if (index != 0)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_query_ctrl(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_queryctrl qc;
|
|
u8 i;
|
|
|
|
if (copy_from_user(&qc, arg, sizeof(qc)))
|
|
return -EFAULT;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
|
|
if (qc.id && qc.id == s->qctrl[i].id) {
|
|
memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
|
|
if (copy_to_user(arg, &qc, sizeof(qc)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_g_ctrl(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_control ctrl;
|
|
int err = 0;
|
|
u8 i;
|
|
|
|
if (!s->get_ctrl && !s->set_ctrl)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
|
|
return -EFAULT;
|
|
|
|
if (!s->get_ctrl) {
|
|
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
|
|
if (ctrl.id == s->qctrl[i].id) {
|
|
ctrl.value = s->_qctrl[i].default_value;
|
|
goto exit;
|
|
}
|
|
return -EINVAL;
|
|
} else
|
|
err = s->get_ctrl(cam, &ctrl);
|
|
|
|
exit:
|
|
if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
|
|
return -EFAULT;
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_control ctrl;
|
|
u8 i;
|
|
int err = 0;
|
|
|
|
if (!s->set_ctrl)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
|
|
return -EFAULT;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
|
|
if (ctrl.id == s->qctrl[i].id) {
|
|
if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
|
|
return -EINVAL;
|
|
if (ctrl.value < s->qctrl[i].minimum ||
|
|
ctrl.value > s->qctrl[i].maximum)
|
|
return -ERANGE;
|
|
ctrl.value -= ctrl.value % s->qctrl[i].step;
|
|
break;
|
|
}
|
|
|
|
if ((err = s->set_ctrl(cam, &ctrl)))
|
|
return err;
|
|
|
|
s->_qctrl[i].default_value = ctrl.value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_cropcap(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
|
|
|
|
cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
cc->pixelaspect.numerator = 1;
|
|
cc->pixelaspect.denominator = 1;
|
|
|
|
if (copy_to_user(arg, cc, sizeof(*cc)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_g_crop(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_crop crop = {
|
|
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
|
};
|
|
|
|
memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
|
|
|
|
if (copy_to_user(arg, &crop, sizeof(crop)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_s_crop(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_crop crop;
|
|
struct v4l2_rect* rect;
|
|
struct v4l2_rect* bounds = &(s->cropcap.bounds);
|
|
const enum zc0301_stream_state stream = cam->stream;
|
|
const u32 nbuffers = cam->nbuffers;
|
|
u32 i;
|
|
int err = 0;
|
|
|
|
if (copy_from_user(&crop, arg, sizeof(crop)))
|
|
return -EFAULT;
|
|
|
|
rect = &(crop.c);
|
|
|
|
if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
if (cam->module_param.force_munmap)
|
|
for (i = 0; i < cam->nbuffers; i++)
|
|
if (cam->frame[i].vma_use_count) {
|
|
DBG(3, "VIDIOC_S_CROP failed. "
|
|
"Unmap the buffers first.");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!s->set_crop) {
|
|
memcpy(rect, &(s->_rect), sizeof(*rect));
|
|
if (copy_to_user(arg, &crop, sizeof(crop)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
rect->left &= ~7L;
|
|
rect->top &= ~7L;
|
|
if (rect->width < 8)
|
|
rect->width = 8;
|
|
if (rect->height < 8)
|
|
rect->height = 8;
|
|
if (rect->width > bounds->width)
|
|
rect->width = bounds->width;
|
|
if (rect->height > bounds->height)
|
|
rect->height = bounds->height;
|
|
if (rect->left < bounds->left)
|
|
rect->left = bounds->left;
|
|
if (rect->top < bounds->top)
|
|
rect->top = bounds->top;
|
|
if (rect->left + rect->width > bounds->left + bounds->width)
|
|
rect->left = bounds->left+bounds->width - rect->width;
|
|
if (rect->top + rect->height > bounds->top + bounds->height)
|
|
rect->top = bounds->top+bounds->height - rect->height;
|
|
rect->width &= ~7L;
|
|
rect->height &= ~7L;
|
|
|
|
if (cam->stream == STREAM_ON)
|
|
if ((err = zc0301_stream_interrupt(cam)))
|
|
return err;
|
|
|
|
if (copy_to_user(arg, &crop, sizeof(crop))) {
|
|
cam->stream = stream;
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (cam->module_param.force_munmap || cam->io == IO_READ)
|
|
zc0301_release_buffers(cam);
|
|
|
|
if (s->set_crop)
|
|
err += s->set_crop(cam, rect);
|
|
|
|
if (err) { /* atomic, no rollback in ioctl() */
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
|
|
"use the camera, close and open /dev/video%d again.",
|
|
cam->v4ldev->num);
|
|
return -EIO;
|
|
}
|
|
|
|
s->pix_format.width = rect->width;
|
|
s->pix_format.height = rect->height;
|
|
memcpy(&(s->_rect), rect, sizeof(*rect));
|
|
|
|
if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
|
|
nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
|
|
"use the camera, close and open /dev/video%d again.",
|
|
cam->v4ldev->num);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (cam->io == IO_READ)
|
|
zc0301_empty_framequeues(cam);
|
|
else if (cam->module_param.force_munmap)
|
|
zc0301_requeue_outqueue(cam);
|
|
|
|
cam->stream = stream;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_enum_framesizes(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_frmsizeenum frmsize;
|
|
|
|
if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
|
|
return -EFAULT;
|
|
|
|
if (frmsize.index != 0 && frmsize.index != 1)
|
|
return -EINVAL;
|
|
|
|
if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG)
|
|
return -EINVAL;
|
|
|
|
frmsize.type = V4L2_FRMSIZE_TYPE_DISCRETE;
|
|
|
|
if (frmsize.index == 1) {
|
|
frmsize.discrete.width = cam->sensor.cropcap.defrect.width;
|
|
frmsize.discrete.height = cam->sensor.cropcap.defrect.height;
|
|
}
|
|
memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
|
|
|
|
if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_enum_fmt(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_fmtdesc fmtd;
|
|
|
|
if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
|
|
return -EFAULT;
|
|
|
|
if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
if (fmtd.index == 0) {
|
|
strcpy(fmtd.description, "JPEG");
|
|
fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
|
|
fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
|
|
|
|
if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_g_fmt(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_format format;
|
|
struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
|
|
|
|
if (copy_from_user(&format, arg, sizeof(format)))
|
|
return -EFAULT;
|
|
|
|
if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
pfmt->bytesperline = 0;
|
|
pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
|
|
pfmt->field = V4L2_FIELD_NONE;
|
|
memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
|
|
|
|
if (copy_to_user(arg, &format, sizeof(format)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_try_s_fmt(struct zc0301_device* cam, unsigned int cmd,
|
|
void __user * arg)
|
|
{
|
|
struct zc0301_sensor* s = &cam->sensor;
|
|
struct v4l2_format format;
|
|
struct v4l2_pix_format* pix;
|
|
struct v4l2_pix_format* pfmt = &(s->pix_format);
|
|
struct v4l2_rect* bounds = &(s->cropcap.bounds);
|
|
struct v4l2_rect rect;
|
|
const enum zc0301_stream_state stream = cam->stream;
|
|
const u32 nbuffers = cam->nbuffers;
|
|
u32 i;
|
|
int err = 0;
|
|
|
|
if (copy_from_user(&format, arg, sizeof(format)))
|
|
return -EFAULT;
|
|
|
|
pix = &(format.fmt.pix);
|
|
|
|
if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
memcpy(&rect, &(s->_rect), sizeof(rect));
|
|
|
|
if (!s->set_crop) {
|
|
pix->width = rect.width;
|
|
pix->height = rect.height;
|
|
} else {
|
|
rect.width = pix->width;
|
|
rect.height = pix->height;
|
|
}
|
|
|
|
if (rect.width < 8)
|
|
rect.width = 8;
|
|
if (rect.height < 8)
|
|
rect.height = 8;
|
|
if (rect.width > bounds->left + bounds->width - rect.left)
|
|
rect.width = bounds->left + bounds->width - rect.left;
|
|
if (rect.height > bounds->top + bounds->height - rect.top)
|
|
rect.height = bounds->top + bounds->height - rect.top;
|
|
rect.width &= ~7L;
|
|
rect.height &= ~7L;
|
|
|
|
pix->width = rect.width;
|
|
pix->height = rect.height;
|
|
pix->pixelformat = pfmt->pixelformat;
|
|
pix->priv = pfmt->priv;
|
|
pix->colorspace = pfmt->colorspace;
|
|
pix->bytesperline = 0;
|
|
pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
|
|
pix->field = V4L2_FIELD_NONE;
|
|
|
|
if (cmd == VIDIOC_TRY_FMT) {
|
|
if (copy_to_user(arg, &format, sizeof(format)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
if (cam->module_param.force_munmap)
|
|
for (i = 0; i < cam->nbuffers; i++)
|
|
if (cam->frame[i].vma_use_count) {
|
|
DBG(3, "VIDIOC_S_FMT failed. "
|
|
"Unmap the buffers first.");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (cam->stream == STREAM_ON)
|
|
if ((err = zc0301_stream_interrupt(cam)))
|
|
return err;
|
|
|
|
if (copy_to_user(arg, &format, sizeof(format))) {
|
|
cam->stream = stream;
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (cam->module_param.force_munmap || cam->io == IO_READ)
|
|
zc0301_release_buffers(cam);
|
|
|
|
if (s->set_crop)
|
|
err += s->set_crop(cam, &rect);
|
|
|
|
if (err) { /* atomic, no rollback in ioctl() */
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
|
|
"use the camera, close and open /dev/video%d again.",
|
|
cam->v4ldev->num);
|
|
return -EIO;
|
|
}
|
|
|
|
memcpy(pfmt, pix, sizeof(*pix));
|
|
memcpy(&(s->_rect), &rect, sizeof(rect));
|
|
|
|
if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
|
|
nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
|
|
"use the camera, close and open /dev/video%d again.",
|
|
cam->v4ldev->num);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (cam->io == IO_READ)
|
|
zc0301_empty_framequeues(cam);
|
|
else if (cam->module_param.force_munmap)
|
|
zc0301_requeue_outqueue(cam);
|
|
|
|
cam->stream = stream;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_g_jpegcomp(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_s_jpegcomp(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_jpegcompression jc;
|
|
const enum zc0301_stream_state stream = cam->stream;
|
|
int err = 0;
|
|
|
|
if (copy_from_user(&jc, arg, sizeof(jc)))
|
|
return -EFAULT;
|
|
|
|
if (jc.quality != 0)
|
|
return -EINVAL;
|
|
|
|
if (cam->stream == STREAM_ON)
|
|
if ((err = zc0301_stream_interrupt(cam)))
|
|
return err;
|
|
|
|
err += zc0301_set_compression(cam, &jc);
|
|
if (err) { /* atomic, no rollback in ioctl() */
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
|
|
"problems. To use the camera, close and open "
|
|
"/dev/video%d again.", cam->v4ldev->num);
|
|
return -EIO;
|
|
}
|
|
|
|
cam->compression.quality = jc.quality;
|
|
|
|
cam->stream = stream;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_reqbufs(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_requestbuffers rb;
|
|
u32 i;
|
|
int err;
|
|
|
|
if (copy_from_user(&rb, arg, sizeof(rb)))
|
|
return -EFAULT;
|
|
|
|
if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
|
|
rb.memory != V4L2_MEMORY_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (cam->io == IO_READ) {
|
|
DBG(3, "Close and open the device again to choose the mmap "
|
|
"I/O method");
|
|
return -EBUSY;
|
|
}
|
|
|
|
for (i = 0; i < cam->nbuffers; i++)
|
|
if (cam->frame[i].vma_use_count) {
|
|
DBG(3, "VIDIOC_REQBUFS failed. "
|
|
"Previous buffers are still mapped.");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (cam->stream == STREAM_ON)
|
|
if ((err = zc0301_stream_interrupt(cam)))
|
|
return err;
|
|
|
|
zc0301_empty_framequeues(cam);
|
|
|
|
zc0301_release_buffers(cam);
|
|
if (rb.count)
|
|
rb.count = zc0301_request_buffers(cam, rb.count, IO_MMAP);
|
|
|
|
if (copy_to_user(arg, &rb, sizeof(rb))) {
|
|
zc0301_release_buffers(cam);
|
|
cam->io = IO_NONE;
|
|
return -EFAULT;
|
|
}
|
|
|
|
cam->io = rb.count ? IO_MMAP : IO_NONE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_querybuf(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_buffer b;
|
|
|
|
if (copy_from_user(&b, arg, sizeof(b)))
|
|
return -EFAULT;
|
|
|
|
if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
|
|
b.index >= cam->nbuffers || cam->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
|
|
|
|
if (cam->frame[b.index].vma_use_count)
|
|
b.flags |= V4L2_BUF_FLAG_MAPPED;
|
|
|
|
if (cam->frame[b.index].state == F_DONE)
|
|
b.flags |= V4L2_BUF_FLAG_DONE;
|
|
else if (cam->frame[b.index].state != F_UNUSED)
|
|
b.flags |= V4L2_BUF_FLAG_QUEUED;
|
|
|
|
if (copy_to_user(arg, &b, sizeof(b)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_qbuf(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_buffer b;
|
|
unsigned long lock_flags;
|
|
|
|
if (copy_from_user(&b, arg, sizeof(b)))
|
|
return -EFAULT;
|
|
|
|
if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
|
|
b.index >= cam->nbuffers || cam->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (cam->frame[b.index].state != F_UNUSED)
|
|
return -EINVAL;
|
|
|
|
cam->frame[b.index].state = F_QUEUED;
|
|
|
|
spin_lock_irqsave(&cam->queue_lock, lock_flags);
|
|
list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
|
|
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
|
|
|
|
PDBGG("Frame #%lu queued", (unsigned long)b.index);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_dqbuf(struct zc0301_device* cam, struct file* filp,
|
|
void __user * arg)
|
|
{
|
|
struct v4l2_buffer b;
|
|
struct zc0301_frame_t *f;
|
|
unsigned long lock_flags;
|
|
long timeout;
|
|
|
|
if (copy_from_user(&b, arg, sizeof(b)))
|
|
return -EFAULT;
|
|
|
|
if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (list_empty(&cam->outqueue)) {
|
|
if (cam->stream == STREAM_OFF)
|
|
return -EINVAL;
|
|
if (filp->f_flags & O_NONBLOCK)
|
|
return -EAGAIN;
|
|
timeout = wait_event_interruptible_timeout
|
|
( cam->wait_frame,
|
|
(!list_empty(&cam->outqueue)) ||
|
|
(cam->state & DEV_DISCONNECTED) ||
|
|
(cam->state & DEV_MISCONFIGURED),
|
|
cam->module_param.frame_timeout *
|
|
1000 * msecs_to_jiffies(1) );
|
|
if (timeout < 0)
|
|
return timeout;
|
|
if (cam->state & DEV_DISCONNECTED)
|
|
return -ENODEV;
|
|
if (!timeout || (cam->state & DEV_MISCONFIGURED))
|
|
return -EIO;
|
|
}
|
|
|
|
spin_lock_irqsave(&cam->queue_lock, lock_flags);
|
|
f = list_entry(cam->outqueue.next, struct zc0301_frame_t, frame);
|
|
list_del(cam->outqueue.next);
|
|
spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
|
|
|
|
f->state = F_UNUSED;
|
|
|
|
memcpy(&b, &f->buf, sizeof(b));
|
|
if (f->vma_use_count)
|
|
b.flags |= V4L2_BUF_FLAG_MAPPED;
|
|
|
|
if (copy_to_user(arg, &b, sizeof(b)))
|
|
return -EFAULT;
|
|
|
|
PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_streamon(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
int type;
|
|
|
|
if (copy_from_user(&type, arg, sizeof(type)))
|
|
return -EFAULT;
|
|
|
|
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
cam->stream = STREAM_ON;
|
|
|
|
DBG(3, "Stream on");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_streamoff(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
int type, err;
|
|
|
|
if (copy_from_user(&type, arg, sizeof(type)))
|
|
return -EFAULT;
|
|
|
|
if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (cam->stream == STREAM_ON)
|
|
if ((err = zc0301_stream_interrupt(cam)))
|
|
return err;
|
|
|
|
zc0301_empty_framequeues(cam);
|
|
|
|
DBG(3, "Stream off");
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_g_parm(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_streamparm sp;
|
|
|
|
if (copy_from_user(&sp, arg, sizeof(sp)))
|
|
return -EFAULT;
|
|
|
|
if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
sp.parm.capture.extendedmode = 0;
|
|
sp.parm.capture.readbuffers = cam->nreadbuffers;
|
|
|
|
if (copy_to_user(arg, &sp, sizeof(sp)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
zc0301_vidioc_s_parm(struct zc0301_device* cam, void __user * arg)
|
|
{
|
|
struct v4l2_streamparm sp;
|
|
|
|
if (copy_from_user(&sp, arg, sizeof(sp)))
|
|
return -EFAULT;
|
|
|
|
if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
sp.parm.capture.extendedmode = 0;
|
|
|
|
if (sp.parm.capture.readbuffers == 0)
|
|
sp.parm.capture.readbuffers = cam->nreadbuffers;
|
|
|
|
if (sp.parm.capture.readbuffers > ZC0301_MAX_FRAMES)
|
|
sp.parm.capture.readbuffers = ZC0301_MAX_FRAMES;
|
|
|
|
if (copy_to_user(arg, &sp, sizeof(sp)))
|
|
return -EFAULT;
|
|
|
|
cam->nreadbuffers = sp.parm.capture.readbuffers;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static long zc0301_ioctl_v4l2(struct file *filp,
|
|
unsigned int cmd, void __user *arg)
|
|
{
|
|
struct zc0301_device *cam = video_drvdata(filp);
|
|
|
|
switch (cmd) {
|
|
|
|
case VIDIOC_QUERYCAP:
|
|
return zc0301_vidioc_querycap(cam, arg);
|
|
|
|
case VIDIOC_ENUMINPUT:
|
|
return zc0301_vidioc_enuminput(cam, arg);
|
|
|
|
case VIDIOC_G_INPUT:
|
|
return zc0301_vidioc_g_input(cam, arg);
|
|
|
|
case VIDIOC_S_INPUT:
|
|
return zc0301_vidioc_s_input(cam, arg);
|
|
|
|
case VIDIOC_QUERYCTRL:
|
|
return zc0301_vidioc_query_ctrl(cam, arg);
|
|
|
|
case VIDIOC_G_CTRL:
|
|
return zc0301_vidioc_g_ctrl(cam, arg);
|
|
|
|
case VIDIOC_S_CTRL:
|
|
return zc0301_vidioc_s_ctrl(cam, arg);
|
|
|
|
case VIDIOC_CROPCAP:
|
|
return zc0301_vidioc_cropcap(cam, arg);
|
|
|
|
case VIDIOC_G_CROP:
|
|
return zc0301_vidioc_g_crop(cam, arg);
|
|
|
|
case VIDIOC_S_CROP:
|
|
return zc0301_vidioc_s_crop(cam, arg);
|
|
|
|
case VIDIOC_ENUM_FMT:
|
|
return zc0301_vidioc_enum_fmt(cam, arg);
|
|
|
|
case VIDIOC_G_FMT:
|
|
return zc0301_vidioc_g_fmt(cam, arg);
|
|
|
|
case VIDIOC_TRY_FMT:
|
|
case VIDIOC_S_FMT:
|
|
return zc0301_vidioc_try_s_fmt(cam, cmd, arg);
|
|
|
|
case VIDIOC_ENUM_FRAMESIZES:
|
|
return zc0301_vidioc_enum_framesizes(cam, arg);
|
|
|
|
case VIDIOC_G_JPEGCOMP:
|
|
return zc0301_vidioc_g_jpegcomp(cam, arg);
|
|
|
|
case VIDIOC_S_JPEGCOMP:
|
|
return zc0301_vidioc_s_jpegcomp(cam, arg);
|
|
|
|
case VIDIOC_REQBUFS:
|
|
return zc0301_vidioc_reqbufs(cam, arg);
|
|
|
|
case VIDIOC_QUERYBUF:
|
|
return zc0301_vidioc_querybuf(cam, arg);
|
|
|
|
case VIDIOC_QBUF:
|
|
return zc0301_vidioc_qbuf(cam, arg);
|
|
|
|
case VIDIOC_DQBUF:
|
|
return zc0301_vidioc_dqbuf(cam, filp, arg);
|
|
|
|
case VIDIOC_STREAMON:
|
|
return zc0301_vidioc_streamon(cam, arg);
|
|
|
|
case VIDIOC_STREAMOFF:
|
|
return zc0301_vidioc_streamoff(cam, arg);
|
|
|
|
case VIDIOC_G_PARM:
|
|
return zc0301_vidioc_g_parm(cam, arg);
|
|
|
|
case VIDIOC_S_PARM:
|
|
return zc0301_vidioc_s_parm(cam, arg);
|
|
|
|
case VIDIOC_G_STD:
|
|
case VIDIOC_S_STD:
|
|
case VIDIOC_QUERYSTD:
|
|
case VIDIOC_ENUMSTD:
|
|
case VIDIOC_QUERYMENU:
|
|
case VIDIOC_ENUM_FRAMEINTERVALS:
|
|
return -EINVAL;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
static long zc0301_ioctl(struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct zc0301_device *cam = video_drvdata(filp);
|
|
int err = 0;
|
|
|
|
if (mutex_lock_interruptible(&cam->fileop_mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
if (cam->state & DEV_DISCONNECTED) {
|
|
DBG(1, "Device not present");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (cam->state & DEV_MISCONFIGURED) {
|
|
DBG(1, "The camera is misconfigured. Close and open it "
|
|
"again.");
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
return -EIO;
|
|
}
|
|
|
|
V4LDBG(3, "zc0301", cmd);
|
|
|
|
err = zc0301_ioctl_v4l2(filp, cmd, (void __user *)arg);
|
|
|
|
mutex_unlock(&cam->fileop_mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static const struct v4l2_file_operations zc0301_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = zc0301_open,
|
|
.release = zc0301_release,
|
|
.ioctl = zc0301_ioctl,
|
|
.read = zc0301_read,
|
|
.poll = zc0301_poll,
|
|
.mmap = zc0301_mmap,
|
|
};
|
|
|
|
/*****************************************************************************/
|
|
|
|
static int
|
|
zc0301_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct zc0301_device* cam;
|
|
static unsigned int dev_nr;
|
|
unsigned int i;
|
|
int err = 0;
|
|
|
|
if (!(cam = kzalloc(sizeof(struct zc0301_device), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
|
|
cam->usbdev = udev;
|
|
|
|
if (!(cam->control_buffer = kzalloc(4, GFP_KERNEL))) {
|
|
DBG(1, "kmalloc() failed");
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (!(cam->v4ldev = video_device_alloc())) {
|
|
DBG(1, "video_device_alloc() failed");
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
DBG(2, "ZC0301[P] Image Processor and Control Chip detected "
|
|
"(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
|
|
|
|
for (i = 0; zc0301_sensor_table[i]; i++) {
|
|
err = zc0301_sensor_table[i](cam);
|
|
if (!err)
|
|
break;
|
|
}
|
|
|
|
if (!err)
|
|
DBG(2, "%s image sensor detected", cam->sensor.name);
|
|
else {
|
|
DBG(1, "No supported image sensor detected");
|
|
err = -ENODEV;
|
|
goto fail;
|
|
}
|
|
|
|
if (zc0301_init(cam)) {
|
|
DBG(1, "Initialization failed. I will retry on open().");
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
}
|
|
|
|
strcpy(cam->v4ldev->name, "ZC0301[P] PC Camera");
|
|
cam->v4ldev->fops = &zc0301_fops;
|
|
cam->v4ldev->minor = video_nr[dev_nr];
|
|
cam->v4ldev->release = video_device_release;
|
|
cam->v4ldev->parent = &udev->dev;
|
|
video_set_drvdata(cam->v4ldev, cam);
|
|
|
|
init_completion(&cam->probe);
|
|
|
|
err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
|
|
video_nr[dev_nr]);
|
|
if (err) {
|
|
DBG(1, "V4L2 device registration failed");
|
|
if (err == -ENFILE && video_nr[dev_nr] == -1)
|
|
DBG(1, "Free /dev/videoX node not found");
|
|
video_nr[dev_nr] = -1;
|
|
dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
|
|
complete_all(&cam->probe);
|
|
goto fail;
|
|
}
|
|
|
|
DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->num);
|
|
|
|
cam->module_param.force_munmap = force_munmap[dev_nr];
|
|
cam->module_param.frame_timeout = frame_timeout[dev_nr];
|
|
|
|
dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
|
|
|
|
usb_set_intfdata(intf, cam);
|
|
kref_init(&cam->kref);
|
|
usb_get_dev(cam->usbdev);
|
|
|
|
complete_all(&cam->probe);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (cam) {
|
|
kfree(cam->control_buffer);
|
|
if (cam->v4ldev)
|
|
video_device_release(cam->v4ldev);
|
|
kfree(cam);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
|
|
static void zc0301_usb_disconnect(struct usb_interface* intf)
|
|
{
|
|
struct zc0301_device* cam;
|
|
|
|
down_write(&zc0301_dev_lock);
|
|
|
|
cam = usb_get_intfdata(intf);
|
|
|
|
DBG(2, "Disconnecting %s...", cam->v4ldev->name);
|
|
|
|
if (cam->users) {
|
|
DBG(2, "Device /dev/video%d is open! Deregistration and "
|
|
"memory deallocation are deferred.",
|
|
cam->v4ldev->num);
|
|
cam->state |= DEV_MISCONFIGURED;
|
|
zc0301_stop_transfer(cam);
|
|
cam->state |= DEV_DISCONNECTED;
|
|
wake_up_interruptible(&cam->wait_frame);
|
|
wake_up(&cam->wait_stream);
|
|
} else
|
|
cam->state |= DEV_DISCONNECTED;
|
|
|
|
wake_up_interruptible_all(&cam->wait_open);
|
|
|
|
kref_put(&cam->kref, zc0301_release_resources);
|
|
|
|
up_write(&zc0301_dev_lock);
|
|
}
|
|
|
|
|
|
static struct usb_driver zc0301_usb_driver = {
|
|
.name = "zc0301",
|
|
.id_table = zc0301_id_table,
|
|
.probe = zc0301_usb_probe,
|
|
.disconnect = zc0301_usb_disconnect,
|
|
};
|
|
|
|
/*****************************************************************************/
|
|
|
|
static int __init zc0301_module_init(void)
|
|
{
|
|
int err = 0;
|
|
|
|
KDBG(2, ZC0301_MODULE_NAME " v" ZC0301_MODULE_VERSION);
|
|
KDBG(3, ZC0301_MODULE_AUTHOR);
|
|
|
|
if ((err = usb_register(&zc0301_usb_driver)))
|
|
KDBG(1, "usb_register() failed");
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static void __exit zc0301_module_exit(void)
|
|
{
|
|
usb_deregister(&zc0301_usb_driver);
|
|
}
|
|
|
|
|
|
module_init(zc0301_module_init);
|
|
module_exit(zc0301_module_exit);
|