2 * Zoran 364xx based USB webcam module version 0.73
4 * Allows you to use your USB webcam with V4L2 applications
5 * This is still in heavy developpement !
7 * Copyright (C) 2004 Antoine Jacquet <royale@zerezo.com>
8 * http://royale.zerezo.com/zr364xx/
10 * Heavily inspired by usb-skeleton.c, vicam.c, cpia.c and spca50x.c drivers
11 * V4L2 version inspired by meye.c driver
13 * Some video buffer code by Lamarque based on s2255drv.c and vivi.c drivers.
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/usb.h>
34 #include <linux/vmalloc.h>
35 #include <linux/slab.h>
36 #include <linux/proc_fs.h>
37 #include <linux/highmem.h>
38 #include <media/v4l2-common.h>
39 #include <media/v4l2-ioctl.h>
40 #include <media/v4l2-device.h>
41 #include <media/v4l2-ctrls.h>
42 #include <media/v4l2-fh.h>
43 #include <media/v4l2-event.h>
44 #include <media/videobuf-vmalloc.h>
47 /* Version Information */
48 #define DRIVER_VERSION "0.7.4"
49 #define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
50 #define DRIVER_DESC "Zoran 364xx"
55 #define MAX_FRAME_SIZE 200000
56 #define BUFFER_SIZE 0x1000
57 #define CTRL_TIMEOUT 500
59 #define ZR364XX_DEF_BUFS 4
60 #define ZR364XX_READ_IDLE 0
61 #define ZR364XX_READ_FRAME 1
64 #define DBG(fmt, args...) \
67 printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
71 /*#define FULL_DEBUG 1*/
75 #define _DBG(fmt, args...)
78 /* Init methods, need to find nicer names for these
79 * the exact names of the chipsets would be the best if someone finds it */
86 /* Module parameters */
91 /* Module parameters interface */
92 module_param(debug, int, 0644);
93 MODULE_PARM_DESC(debug, "Debug level");
94 module_param(mode, int, 0644);
95 MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");
98 /* Devices supported by this driver
99 * .driver_info contains the init method used by the camera */
100 static struct usb_device_id device_table[] = {
101 {USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
102 {USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
103 {USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
104 {USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
105 {USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
106 {USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
107 {USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
108 {USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
109 {USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
110 {USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
111 {USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
112 {USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
113 {USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
114 {USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
115 {USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
116 {USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
117 {USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
118 {USB_DEVICE(0x0a17, 0x004e), .driver_info = METHOD2 },
119 {USB_DEVICE(0x041e, 0x405d), .driver_info = METHOD2 },
120 {USB_DEVICE(0x08ca, 0x2102), .driver_info = METHOD3 },
121 {USB_DEVICE(0x06d6, 0x003d), .driver_info = METHOD0 },
122 {} /* Terminating entry */
125 MODULE_DEVICE_TABLE(usb, device_table);
127 /* frame structure */
128 struct zr364xx_framei {
129 unsigned long ulState; /* ulState:ZR364XX_READ_IDLE,
130 ZR364XX_READ_FRAME */
131 void *lpvbits; /* image data */
132 unsigned long cur_size; /* current data copied to it */
135 /* image buffer structure */
136 struct zr364xx_bufferi {
137 unsigned long dwFrames; /* number of frames in buffer */
138 struct zr364xx_framei frame[FRAMES]; /* array of FRAME structures */
141 struct zr364xx_dmaqueue {
142 struct list_head active;
143 struct zr364xx_camera *cam;
146 struct zr364xx_pipeinfo {
151 void *cam; /* back pointer to zr364xx_camera struct */
163 static const struct zr364xx_fmt formats[] = {
166 .fourcc = V4L2_PIX_FMT_JPEG,
172 struct zr364xx_camera {
173 struct usb_device *udev; /* save off the usb device pointer */
174 struct usb_interface *interface;/* the interface for this device */
175 struct v4l2_device v4l2_dev;
176 struct v4l2_ctrl_handler ctrl_handler;
177 struct video_device vdev; /* v4l video device */
178 struct v4l2_fh *owner; /* owns the streaming */
180 struct zr364xx_bufferi buffer;
188 struct zr364xx_dmaqueue vidq;
191 unsigned long frame_count;
193 struct zr364xx_pipeinfo pipe[1];
197 const struct zr364xx_fmt *fmt;
198 struct videobuf_queue vb_vidq;
202 /* buffer for one video frame */
203 struct zr364xx_buffer {
204 /* common v4l buffer stuff -- must be first */
205 struct videobuf_buffer vb;
206 const struct zr364xx_fmt *fmt;
209 /* function used to send initialisation commands to the camera */
210 static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
211 u16 index, unsigned char *cp, u16 size)
215 unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
216 if (!transfer_buffer) {
217 dev_err(&udev->dev, "kmalloc(%d) failed\n", size);
221 memcpy(transfer_buffer, cp, size);
223 status = usb_control_msg(udev,
224 usb_sndctrlpipe(udev, 0),
226 USB_DIR_OUT | USB_TYPE_VENDOR |
227 USB_RECIP_DEVICE, value, index,
228 transfer_buffer, size, CTRL_TIMEOUT);
230 kfree(transfer_buffer);
235 /* Control messages sent to the camera to initialize it
236 * and launch the capture */
240 unsigned char *bytes;
244 static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
245 static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
246 static unsigned char m0d3[] = { 0, 0 };
247 static message m0[] = {
250 {0x3370, sizeof(m0d1), m0d1},
253 {0x2610, sizeof(m0d2), m0d2},
258 {0x9a01, sizeof(m0d3), m0d3},
263 static unsigned char m1d1[] = { 0xff, 0xff };
264 static unsigned char m1d2[] = { 0x00, 0x00 };
265 static message m1[] = {
273 {0x2502, sizeof(m1d1), m1d1},
278 {0x9a01, sizeof(m1d2), m1d2},
283 static unsigned char m2d1[] = { 0xff, 0xff };
284 static message m2[] = {
291 {0x2502, sizeof(m2d1), m2d1},
297 static message *init[4] = { m0, m1, m2, m2 };
300 /* JPEG static data in header (Huffman table, etc) */
301 static unsigned char header1[] = {
304 0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
305 0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
307 0xFF, 0xDB, 0x00, 0x84
309 static unsigned char header2[] = {
310 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
311 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
312 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
313 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
314 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
315 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
316 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
317 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
318 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
319 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
320 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
321 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
322 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
323 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
324 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
325 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
326 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
327 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
328 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
329 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
330 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
331 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
332 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
333 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
334 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
335 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
336 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
337 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
338 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
339 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
340 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
341 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
342 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
343 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
344 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
345 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
346 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
347 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
348 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
349 0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
350 0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
351 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
354 static unsigned char header3;
356 /* ------------------------------------------------------------------
358 ------------------------------------------------------------------*/
360 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
363 struct zr364xx_camera *cam = vq->priv_data;
365 *size = cam->width * cam->height * (cam->fmt->depth >> 3);
368 *count = ZR364XX_DEF_BUFS;
370 if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
371 *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
376 static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
378 _DBG("%s\n", __func__);
380 BUG_ON(in_interrupt());
382 videobuf_vmalloc_free(&buf->vb);
383 buf->vb.state = VIDEOBUF_NEEDS_INIT;
386 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
387 enum v4l2_field field)
389 struct zr364xx_camera *cam = vq->priv_data;
390 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
394 DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
395 cam->fmt->name : "");
396 if (cam->fmt == NULL)
399 buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
401 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
402 DBG("invalid buffer prepare\n");
407 buf->vb.width = cam->width;
408 buf->vb.height = cam->height;
409 buf->vb.field = field;
411 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
412 rc = videobuf_iolock(vq, &buf->vb, NULL);
417 buf->vb.state = VIDEOBUF_PREPARED;
420 free_buffer(vq, buf);
424 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
426 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
428 struct zr364xx_camera *cam = vq->priv_data;
430 _DBG("%s\n", __func__);
432 buf->vb.state = VIDEOBUF_QUEUED;
433 list_add_tail(&buf->vb.queue, &cam->vidq.active);
436 static void buffer_release(struct videobuf_queue *vq,
437 struct videobuf_buffer *vb)
439 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
442 _DBG("%s\n", __func__);
443 free_buffer(vq, buf);
446 static struct videobuf_queue_ops zr364xx_video_qops = {
447 .buf_setup = buffer_setup,
448 .buf_prepare = buffer_prepare,
449 .buf_queue = buffer_queue,
450 .buf_release = buffer_release,
453 /********************/
454 /* V4L2 integration */
455 /********************/
456 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
457 enum v4l2_buf_type type);
459 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
462 struct zr364xx_camera *cam = video_drvdata(file);
465 _DBG("%s\n", __func__);
473 if (mutex_lock_interruptible(&cam->lock))
476 err = zr364xx_vidioc_streamon(file, file->private_data,
477 V4L2_BUF_TYPE_VIDEO_CAPTURE);
479 DBG("%s: reading %d bytes at pos %d.\n", __func__,
480 (int) count, (int) *ppos);
483 err = videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
484 file->f_flags & O_NONBLOCK);
486 mutex_unlock(&cam->lock);
490 /* video buffer vmalloc implementation based partly on VIVI driver which is
491 * Copyright (c) 2006 by
492 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
493 * Ted Walther <ted--a.t--enumera.com>
494 * John Sokol <sokol--a.t--videotechnology.com>
495 * http://v4l.videotechnology.com/
498 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
499 struct zr364xx_buffer *buf,
504 char *vbuf = videobuf_to_vmalloc(&buf->vb);
505 unsigned long last_frame;
510 last_frame = cam->last_frame;
511 if (last_frame != -1) {
512 tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
513 switch (buf->fmt->fourcc) {
514 case V4L2_PIX_FMT_JPEG:
515 buf->vb.size = jpgsize;
516 memcpy(vbuf, tmpbuf, buf->vb.size);
519 printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
521 cam->last_frame = -1;
523 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
526 DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
527 (unsigned long)vbuf, pos);
528 /* tell v4l buffer was filled */
530 buf->vb.field_count = cam->frame_count * 2;
531 v4l2_get_timestamp(&buf->vb.ts);
532 buf->vb.state = VIDEOBUF_DONE;
535 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
537 struct zr364xx_dmaqueue *dma_q = &cam->vidq;
538 struct zr364xx_buffer *buf;
539 unsigned long flags = 0;
542 DBG("wakeup: %p\n", &dma_q);
543 spin_lock_irqsave(&cam->slock, flags);
545 if (list_empty(&dma_q->active)) {
546 DBG("No active queue to serve\n");
550 buf = list_entry(dma_q->active.next,
551 struct zr364xx_buffer, vb.queue);
553 if (!waitqueue_active(&buf->vb.done)) {
558 list_del(&buf->vb.queue);
559 v4l2_get_timestamp(&buf->vb.ts);
560 DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
561 zr364xx_fillbuff(cam, buf, jpgsize);
562 wake_up(&buf->vb.done);
563 DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
565 spin_unlock_irqrestore(&cam->slock, flags);
569 /* this function moves the usb stream read pipe data
570 * into the system buffers.
571 * returns 0 on success, EAGAIN if more data to process (call this
574 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
575 struct zr364xx_pipeinfo *pipe_info,
578 unsigned char *pdest;
581 struct zr364xx_framei *frm;
583 unsigned char *ptr = NULL;
585 _DBG("buffer to user\n");
586 idx = cam->cur_frame;
587 frm = &cam->buffer.frame[idx];
589 /* swap bytes if camera needs it */
590 if (cam->method == METHOD0) {
591 u16 *buf = (u16 *)pipe_info->transfer_buffer;
592 for (i = 0; i < purb->actual_length/2; i++)
596 /* search done. now find out if should be acquiring */
597 if (!cam->b_acquire) {
598 /* we found a frame, but this channel is turned off */
599 frm->ulState = ZR364XX_READ_IDLE;
603 psrc = (u8 *)pipe_info->transfer_buffer;
604 ptr = pdest = frm->lpvbits;
606 if (frm->ulState == ZR364XX_READ_IDLE) {
607 if (purb->actual_length < 128) {
608 /* header incomplete */
609 dev_info(&cam->udev->dev,
610 "%s: buffer (%d bytes) too small to hold jpeg header. Discarding.\n",
611 __func__, purb->actual_length);
615 frm->ulState = ZR364XX_READ_FRAME;
618 _DBG("jpeg header, ");
619 memcpy(ptr, header1, sizeof(header1));
620 ptr += sizeof(header1);
622 memcpy(ptr, &header3, 1);
624 memcpy(ptr, psrc, 64);
627 memcpy(ptr, &header3, 1);
629 memcpy(ptr, psrc + 64, 64);
631 memcpy(ptr, header2, sizeof(header2));
632 ptr += sizeof(header2);
633 memcpy(ptr, psrc + 128,
634 purb->actual_length - 128);
635 ptr += purb->actual_length - 128;
636 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
637 psrc[0], psrc[1], psrc[2],
638 psrc[3], psrc[4], psrc[5],
639 psrc[6], psrc[7], psrc[8]);
640 frm->cur_size = ptr - pdest;
642 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
643 dev_info(&cam->udev->dev,
644 "%s: buffer (%d bytes) too small to hold "
645 "frame data. Discarding frame data.\n",
646 __func__, MAX_FRAME_SIZE);
648 pdest += frm->cur_size;
649 memcpy(pdest, psrc, purb->actual_length);
650 frm->cur_size += purb->actual_length;
653 /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
654 purb->actual_length);*/
656 if (purb->actual_length < pipe_info->transfer_size) {
657 _DBG("****************Buffer[%d]full*************\n", idx);
658 cam->last_frame = cam->cur_frame;
660 /* end of system frame ring buffer, start at zero */
661 if (cam->cur_frame == cam->buffer.dwFrames)
665 /* go back to find the JPEG EOI marker */
666 ptr = pdest = frm->lpvbits;
667 ptr += frm->cur_size - 2;
668 while (ptr > pdest) {
669 if (*ptr == 0xFF && *(ptr + 1) == 0xD9
670 && *(ptr + 2) == 0xFF)
675 DBG("No EOI marker\n");
677 /* Sometimes there is junk data in the middle of the picture,
678 * we want to skip this bogus frames */
679 while (ptr > pdest) {
680 if (*ptr == 0xFF && *(ptr + 1) == 0xFF
681 && *(ptr + 2) == 0xFF)
686 DBG("Bogus frame ? %d\n", ++(cam->nb));
687 } else if (cam->b_acquire) {
688 /* we skip the 2 first frames which are usually buggy */
692 _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
694 pdest[0], pdest[1], pdest[2], pdest[3],
695 pdest[4], pdest[5], pdest[6], pdest[7]);
697 zr364xx_got_frame(cam, frm->cur_size);
701 frm->ulState = ZR364XX_READ_IDLE;
704 /* done successfully */
708 static int zr364xx_vidioc_querycap(struct file *file, void *priv,
709 struct v4l2_capability *cap)
711 struct zr364xx_camera *cam = video_drvdata(file);
713 strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
714 if (cam->udev->product)
715 strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
716 strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
717 sizeof(cap->bus_info));
718 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
721 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
726 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
727 struct v4l2_input *i)
731 strcpy(i->name, DRIVER_DESC " Camera");
732 i->type = V4L2_INPUT_TYPE_CAMERA;
736 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
743 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
751 static int zr364xx_s_ctrl(struct v4l2_ctrl *ctrl)
753 struct zr364xx_camera *cam =
754 container_of(ctrl->handler, struct zr364xx_camera, ctrl_handler);
758 case V4L2_CID_BRIGHTNESS:
759 /* hardware brightness */
760 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
761 temp = (0x60 << 8) + 127 - ctrl->val;
762 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
771 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
772 void *priv, struct v4l2_fmtdesc *f)
776 f->flags = V4L2_FMT_FLAG_COMPRESSED;
777 strcpy(f->description, formats[0].name);
778 f->pixelformat = formats[0].fourcc;
782 static char *decode_fourcc(__u32 pixelformat, char *buf)
784 buf[0] = pixelformat & 0xff;
785 buf[1] = (pixelformat >> 8) & 0xff;
786 buf[2] = (pixelformat >> 16) & 0xff;
787 buf[3] = (pixelformat >> 24) & 0xff;
792 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
793 struct v4l2_format *f)
795 struct zr364xx_camera *cam = video_drvdata(file);
796 char pixelformat_name[5];
801 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
802 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
803 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
807 if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
808 !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
809 f->fmt.pix.width = 320;
810 f->fmt.pix.height = 240;
813 f->fmt.pix.field = V4L2_FIELD_NONE;
814 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
815 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
816 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
817 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
818 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
823 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
824 struct v4l2_format *f)
826 struct zr364xx_camera *cam;
830 cam = video_drvdata(file);
832 f->fmt.pix.pixelformat = formats[0].fourcc;
833 f->fmt.pix.field = V4L2_FIELD_NONE;
834 f->fmt.pix.width = cam->width;
835 f->fmt.pix.height = cam->height;
836 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
837 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
838 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
842 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
843 struct v4l2_format *f)
845 struct zr364xx_camera *cam = video_drvdata(file);
846 struct videobuf_queue *q = &cam->vb_vidq;
847 char pixelformat_name[5];
848 int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
854 mutex_lock(&q->vb_lock);
856 if (videobuf_queue_is_busy(&cam->vb_vidq)) {
857 DBG("%s queue busy\n", __func__);
863 DBG("%s can't change format after started\n", __func__);
868 cam->width = f->fmt.pix.width;
869 cam->height = f->fmt.pix.height;
870 DBG("%s: %dx%d mode selected\n", __func__,
871 cam->width, cam->height);
872 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
873 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
874 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
875 cam->vb_vidq.field = f->fmt.pix.field;
877 if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
879 else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
885 m1[2].value = 0xf000 + mode;
886 m2[1].value = 0xf000 + mode;
888 /* special case for METHOD3, the modes are different */
889 if (cam->method == METHOD3) {
892 m2[1].value = 0xf000 + 4;
895 m2[1].value = 0xf000 + 0;
898 m2[1].value = 0xf000 + 1;
903 header2[437] = cam->height / 256;
904 header2[438] = cam->height % 256;
905 header2[439] = cam->width / 256;
906 header2[440] = cam->width % 256;
908 for (i = 0; init[cam->method][i].size != -1; i++) {
910 send_control_msg(cam->udev, 1, init[cam->method][i].value,
911 0, init[cam->method][i].bytes,
912 init[cam->method][i].size);
914 dev_err(&cam->udev->dev,
915 "error during resolution change sequence: %d\n", i);
920 /* Added some delay here, since opening/closing the camera quickly,
921 * like Ekiga does during its startup, can crash the webcam
928 mutex_unlock(&q->vb_lock);
930 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
931 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
936 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
937 struct v4l2_requestbuffers *p)
939 struct zr364xx_camera *cam = video_drvdata(file);
941 if (cam->owner && cam->owner != priv)
943 return videobuf_reqbufs(&cam->vb_vidq, p);
946 static int zr364xx_vidioc_querybuf(struct file *file,
948 struct v4l2_buffer *p)
951 struct zr364xx_camera *cam = video_drvdata(file);
952 rc = videobuf_querybuf(&cam->vb_vidq, p);
956 static int zr364xx_vidioc_qbuf(struct file *file,
958 struct v4l2_buffer *p)
961 struct zr364xx_camera *cam = video_drvdata(file);
962 _DBG("%s\n", __func__);
963 if (cam->owner && cam->owner != priv)
965 rc = videobuf_qbuf(&cam->vb_vidq, p);
969 static int zr364xx_vidioc_dqbuf(struct file *file,
971 struct v4l2_buffer *p)
974 struct zr364xx_camera *cam = video_drvdata(file);
975 _DBG("%s\n", __func__);
976 if (cam->owner && cam->owner != priv)
978 rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
982 static void read_pipe_completion(struct urb *purb)
984 struct zr364xx_pipeinfo *pipe_info;
985 struct zr364xx_camera *cam;
988 pipe_info = purb->context;
989 _DBG("%s %p, status %d\n", __func__, purb, purb->status);
990 if (pipe_info == NULL) {
991 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
995 cam = pipe_info->cam;
997 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
1001 /* if shutting down, do not resubmit, exit immediately */
1002 if (purb->status == -ESHUTDOWN) {
1003 DBG("%s, err shutdown\n", __func__);
1004 pipe_info->err_count++;
1008 if (pipe_info->state == 0) {
1009 DBG("exiting USB pipe\n");
1013 if (purb->actual_length > pipe_info->transfer_size) {
1014 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1018 if (purb->status == 0)
1019 zr364xx_read_video_callback(cam, pipe_info, purb);
1021 pipe_info->err_count++;
1022 DBG("%s: failed URB %d\n", __func__, purb->status);
1025 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1028 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1030 pipe_info->transfer_buffer,
1031 pipe_info->transfer_size,
1032 read_pipe_completion, pipe_info);
1034 if (pipe_info->state != 0) {
1035 purb->status = usb_submit_urb(pipe_info->stream_urb,
1039 dev_err(&cam->udev->dev,
1040 "error submitting urb (error=%i)\n",
1043 DBG("read pipe complete state 0\n");
1046 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1050 struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1051 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1052 DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1054 pipe_info->state = 1;
1055 pipe_info->err_count = 0;
1056 pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1057 if (!pipe_info->stream_urb)
1059 /* transfer buffer allocated in board_init */
1060 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1062 pipe_info->transfer_buffer,
1063 pipe_info->transfer_size,
1064 read_pipe_completion, pipe_info);
1066 DBG("submitting URB %p\n", pipe_info->stream_urb);
1067 retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1069 usb_free_urb(pipe_info->stream_urb);
1070 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1077 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1079 struct zr364xx_pipeinfo *pipe_info;
1082 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1085 DBG("stop read pipe\n");
1086 pipe_info = cam->pipe;
1088 if (pipe_info->state != 0)
1089 pipe_info->state = 0;
1091 if (pipe_info->stream_urb) {
1093 usb_kill_urb(pipe_info->stream_urb);
1094 usb_free_urb(pipe_info->stream_urb);
1095 pipe_info->stream_urb = NULL;
1101 /* starts acquisition process */
1102 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1106 DBG("start acquire\n");
1108 cam->last_frame = -1;
1110 for (j = 0; j < FRAMES; j++) {
1111 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1112 cam->buffer.frame[j].cur_size = 0;
1118 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1124 static int zr364xx_prepare(struct zr364xx_camera *cam)
1129 for (i = 0; init[cam->method][i].size != -1; i++) {
1130 res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
1131 0, init[cam->method][i].bytes,
1132 init[cam->method][i].size);
1134 dev_err(&cam->udev->dev,
1135 "error during open sequence: %d\n", i);
1141 cam->last_frame = -1;
1143 cam->frame_count = 0;
1144 for (j = 0; j < FRAMES; j++) {
1145 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1146 cam->buffer.frame[j].cur_size = 0;
1148 v4l2_ctrl_handler_setup(&cam->ctrl_handler);
1152 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1153 enum v4l2_buf_type type)
1155 struct zr364xx_camera *cam = video_drvdata(file);
1158 DBG("%s\n", __func__);
1160 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1163 if (cam->owner && cam->owner != priv)
1166 res = zr364xx_prepare(cam);
1169 res = videobuf_streamon(&cam->vb_vidq);
1171 zr364xx_start_acquire(cam);
1172 cam->owner = file->private_data;
1177 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1178 enum v4l2_buf_type type)
1180 struct zr364xx_camera *cam = video_drvdata(file);
1182 DBG("%s\n", __func__);
1183 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1185 if (cam->owner && cam->owner != priv)
1187 zr364xx_stop_acquire(cam);
1188 return videobuf_streamoff(&cam->vb_vidq);
1192 /* open the camera */
1193 static int zr364xx_open(struct file *file)
1195 struct zr364xx_camera *cam = video_drvdata(file);
1198 DBG("%s\n", __func__);
1200 if (mutex_lock_interruptible(&cam->lock))
1201 return -ERESTARTSYS;
1203 err = v4l2_fh_open(file);
1207 /* Added some delay here, since opening/closing the camera quickly,
1208 * like Ekiga does during its startup, can crash the webcam
1214 mutex_unlock(&cam->lock);
1215 DBG("%s: %d\n", __func__, err);
1219 static void zr364xx_release(struct v4l2_device *v4l2_dev)
1221 struct zr364xx_camera *cam =
1222 container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
1225 v4l2_device_unregister(&cam->v4l2_dev);
1227 videobuf_mmap_free(&cam->vb_vidq);
1229 /* release sys buffers */
1230 for (i = 0; i < FRAMES; i++) {
1231 if (cam->buffer.frame[i].lpvbits) {
1232 DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1233 vfree(cam->buffer.frame[i].lpvbits);
1235 cam->buffer.frame[i].lpvbits = NULL;
1238 v4l2_ctrl_handler_free(&cam->ctrl_handler);
1239 /* release transfer buffer */
1240 kfree(cam->pipe->transfer_buffer);
1244 /* release the camera */
1245 static int zr364xx_close(struct file *file)
1247 struct zr364xx_camera *cam;
1248 struct usb_device *udev;
1251 DBG("%s\n", __func__);
1252 cam = video_drvdata(file);
1254 mutex_lock(&cam->lock);
1257 if (file->private_data == cam->owner) {
1258 /* turn off stream */
1260 zr364xx_stop_acquire(cam);
1261 videobuf_streamoff(&cam->vb_vidq);
1263 for (i = 0; i < 2; i++) {
1264 send_control_msg(udev, 1, init[cam->method][i].value,
1265 0, init[cam->method][i].bytes,
1266 init[cam->method][i].size);
1271 /* Added some delay here, since opening/closing the camera quickly,
1272 * like Ekiga does during its startup, can crash the webcam
1275 mutex_unlock(&cam->lock);
1276 return v4l2_fh_release(file);
1280 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1282 struct zr364xx_camera *cam = video_drvdata(file);
1286 DBG("%s: cam == NULL\n", __func__);
1289 DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1291 ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1293 DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1294 (unsigned long)vma->vm_start,
1295 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1299 static unsigned int zr364xx_poll(struct file *file,
1300 struct poll_table_struct *wait)
1302 struct zr364xx_camera *cam = video_drvdata(file);
1303 struct videobuf_queue *q = &cam->vb_vidq;
1304 unsigned res = v4l2_ctrl_poll(file, wait);
1306 _DBG("%s\n", __func__);
1308 return res | videobuf_poll_stream(file, q, wait);
1311 static const struct v4l2_ctrl_ops zr364xx_ctrl_ops = {
1312 .s_ctrl = zr364xx_s_ctrl,
1315 static const struct v4l2_file_operations zr364xx_fops = {
1316 .owner = THIS_MODULE,
1317 .open = zr364xx_open,
1318 .release = zr364xx_close,
1319 .read = zr364xx_read,
1320 .mmap = zr364xx_mmap,
1321 .unlocked_ioctl = video_ioctl2,
1322 .poll = zr364xx_poll,
1325 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1326 .vidioc_querycap = zr364xx_vidioc_querycap,
1327 .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1328 .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1329 .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
1330 .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
1331 .vidioc_enum_input = zr364xx_vidioc_enum_input,
1332 .vidioc_g_input = zr364xx_vidioc_g_input,
1333 .vidioc_s_input = zr364xx_vidioc_s_input,
1334 .vidioc_streamon = zr364xx_vidioc_streamon,
1335 .vidioc_streamoff = zr364xx_vidioc_streamoff,
1336 .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
1337 .vidioc_querybuf = zr364xx_vidioc_querybuf,
1338 .vidioc_qbuf = zr364xx_vidioc_qbuf,
1339 .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
1340 .vidioc_log_status = v4l2_ctrl_log_status,
1341 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1342 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1345 static struct video_device zr364xx_template = {
1346 .name = DRIVER_DESC,
1347 .fops = &zr364xx_fops,
1348 .ioctl_ops = &zr364xx_ioctl_ops,
1349 .release = video_device_release_empty,
1354 /*******************/
1355 /* USB integration */
1356 /*******************/
1357 static int zr364xx_board_init(struct zr364xx_camera *cam)
1359 struct zr364xx_pipeinfo *pipe = cam->pipe;
1362 DBG("board init: %p\n", cam);
1363 memset(pipe, 0, sizeof(*pipe));
1365 pipe->transfer_size = BUFFER_SIZE;
1367 pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1369 if (pipe->transfer_buffer == NULL) {
1370 DBG("out of memory!\n");
1375 cam->frame_count = 0;
1377 /*** start create system buffers ***/
1378 for (i = 0; i < FRAMES; i++) {
1379 /* always allocate maximum size for system buffers */
1380 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1382 DBG("valloc %p, idx %lu, pdata %p\n",
1383 &cam->buffer.frame[i], i,
1384 cam->buffer.frame[i].lpvbits);
1385 if (cam->buffer.frame[i].lpvbits == NULL) {
1386 printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1387 "Using less frames\n");
1393 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1394 kfree(cam->pipe->transfer_buffer);
1395 cam->pipe->transfer_buffer = NULL;
1398 cam->buffer.dwFrames = i;
1400 /* make sure internal states are set */
1401 for (i = 0; i < FRAMES; i++) {
1402 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1403 cam->buffer.frame[i].cur_size = 0;
1407 cam->last_frame = -1;
1408 /*** end create system buffers ***/
1410 /* start read pipe */
1411 zr364xx_start_readpipe(cam);
1412 DBG(": board initialized\n");
1416 static int zr364xx_probe(struct usb_interface *intf,
1417 const struct usb_device_id *id)
1419 struct usb_device *udev = interface_to_usbdev(intf);
1420 struct zr364xx_camera *cam = NULL;
1421 struct usb_host_interface *iface_desc;
1422 struct usb_endpoint_descriptor *endpoint;
1423 struct v4l2_ctrl_handler *hdl;
1427 DBG("probing...\n");
1429 dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1430 dev_info(&intf->dev, "model %04x:%04x detected\n",
1431 le16_to_cpu(udev->descriptor.idVendor),
1432 le16_to_cpu(udev->descriptor.idProduct));
1434 cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1436 dev_err(&udev->dev, "cam: out of memory !\n");
1440 cam->v4l2_dev.release = zr364xx_release;
1441 err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
1443 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1447 hdl = &cam->ctrl_handler;
1448 v4l2_ctrl_handler_init(hdl, 1);
1449 v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
1450 V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
1453 dev_err(&udev->dev, "couldn't register control\n");
1456 /* save the init method used by this camera */
1457 cam->method = id->driver_info;
1458 mutex_init(&cam->lock);
1459 cam->vdev = zr364xx_template;
1460 cam->vdev.lock = &cam->lock;
1461 cam->vdev.v4l2_dev = &cam->v4l2_dev;
1462 cam->vdev.ctrl_handler = &cam->ctrl_handler;
1463 video_set_drvdata(&cam->vdev, cam);
1469 dev_info(&udev->dev, "160x120 mode selected\n");
1474 dev_info(&udev->dev, "640x480 mode selected\n");
1479 dev_info(&udev->dev, "320x240 mode selected\n");
1486 m1[2].value = 0xf000 + mode;
1487 m2[1].value = 0xf000 + mode;
1489 /* special case for METHOD3, the modes are different */
1490 if (cam->method == METHOD3) {
1493 m2[1].value = 0xf000 + 4;
1496 m2[1].value = 0xf000 + 0;
1499 m2[1].value = 0xf000 + 1;
1504 header2[437] = cam->height / 256;
1505 header2[438] = cam->height % 256;
1506 header2[439] = cam->width / 256;
1507 header2[440] = cam->width % 256;
1511 DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1513 /* set up the endpoint information */
1514 iface_desc = intf->cur_altsetting;
1515 DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1516 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1517 endpoint = &iface_desc->endpoint[i].desc;
1518 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1519 /* we found the bulk in endpoint */
1520 cam->read_endpoint = endpoint->bEndpointAddress;
1524 if (!cam->read_endpoint) {
1526 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1531 INIT_LIST_HEAD(&cam->vidq.active);
1532 cam->vidq.cam = cam;
1534 usb_set_intfdata(intf, cam);
1536 /* load zr364xx board specific */
1537 err = zr364xx_board_init(cam);
1539 err = v4l2_ctrl_handler_setup(hdl);
1543 spin_lock_init(&cam->slock);
1547 videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1549 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1551 sizeof(struct zr364xx_buffer), cam, &cam->lock);
1553 err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1555 dev_err(&udev->dev, "video_register_device failed\n");
1559 dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1560 video_device_node_name(&cam->vdev));
1564 v4l2_ctrl_handler_free(hdl);
1565 v4l2_device_unregister(&cam->v4l2_dev);
1571 static void zr364xx_disconnect(struct usb_interface *intf)
1573 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1575 mutex_lock(&cam->lock);
1576 usb_set_intfdata(intf, NULL);
1577 dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1578 video_unregister_device(&cam->vdev);
1579 v4l2_device_disconnect(&cam->v4l2_dev);
1581 /* stops the read pipe if it is running */
1583 zr364xx_stop_acquire(cam);
1585 zr364xx_stop_readpipe(cam);
1586 mutex_unlock(&cam->lock);
1587 v4l2_device_put(&cam->v4l2_dev);
1592 static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
1594 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1596 cam->was_streaming = cam->b_acquire;
1597 if (!cam->was_streaming)
1599 zr364xx_stop_acquire(cam);
1600 zr364xx_stop_readpipe(cam);
1604 static int zr364xx_resume(struct usb_interface *intf)
1606 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1609 if (!cam->was_streaming)
1612 zr364xx_start_readpipe(cam);
1613 res = zr364xx_prepare(cam);
1615 zr364xx_start_acquire(cam);
1620 /**********************/
1621 /* Module integration */
1622 /**********************/
1624 static struct usb_driver zr364xx_driver = {
1626 .probe = zr364xx_probe,
1627 .disconnect = zr364xx_disconnect,
1629 .suspend = zr364xx_suspend,
1630 .resume = zr364xx_resume,
1631 .reset_resume = zr364xx_resume,
1633 .id_table = device_table
1636 module_usb_driver(zr364xx_driver);
1638 MODULE_AUTHOR(DRIVER_AUTHOR);
1639 MODULE_DESCRIPTION(DRIVER_DESC);
1640 MODULE_LICENSE("GPL");
1641 MODULE_VERSION(DRIVER_VERSION);