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 strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
715 strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
716 sizeof(cap->bus_info));
717 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
720 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
725 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
726 struct v4l2_input *i)
730 strcpy(i->name, DRIVER_DESC " Camera");
731 i->type = V4L2_INPUT_TYPE_CAMERA;
735 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
742 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
750 static int zr364xx_s_ctrl(struct v4l2_ctrl *ctrl)
752 struct zr364xx_camera *cam =
753 container_of(ctrl->handler, struct zr364xx_camera, ctrl_handler);
757 case V4L2_CID_BRIGHTNESS:
758 /* hardware brightness */
759 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
760 temp = (0x60 << 8) + 127 - ctrl->val;
761 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
770 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
771 void *priv, struct v4l2_fmtdesc *f)
775 f->flags = V4L2_FMT_FLAG_COMPRESSED;
776 strcpy(f->description, formats[0].name);
777 f->pixelformat = formats[0].fourcc;
781 static char *decode_fourcc(__u32 pixelformat, char *buf)
783 buf[0] = pixelformat & 0xff;
784 buf[1] = (pixelformat >> 8) & 0xff;
785 buf[2] = (pixelformat >> 16) & 0xff;
786 buf[3] = (pixelformat >> 24) & 0xff;
791 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
792 struct v4l2_format *f)
794 struct zr364xx_camera *cam = video_drvdata(file);
795 char pixelformat_name[5];
800 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
801 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
802 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
806 if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
807 !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
808 f->fmt.pix.width = 320;
809 f->fmt.pix.height = 240;
812 f->fmt.pix.field = V4L2_FIELD_NONE;
813 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
814 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
815 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
816 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
817 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
822 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
823 struct v4l2_format *f)
825 struct zr364xx_camera *cam;
829 cam = video_drvdata(file);
831 f->fmt.pix.pixelformat = formats[0].fourcc;
832 f->fmt.pix.field = V4L2_FIELD_NONE;
833 f->fmt.pix.width = cam->width;
834 f->fmt.pix.height = cam->height;
835 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
836 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
837 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
841 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
842 struct v4l2_format *f)
844 struct zr364xx_camera *cam = video_drvdata(file);
845 struct videobuf_queue *q = &cam->vb_vidq;
846 char pixelformat_name[5];
847 int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
853 mutex_lock(&q->vb_lock);
855 if (videobuf_queue_is_busy(&cam->vb_vidq)) {
856 DBG("%s queue busy\n", __func__);
862 DBG("%s can't change format after started\n", __func__);
867 cam->width = f->fmt.pix.width;
868 cam->height = f->fmt.pix.height;
869 DBG("%s: %dx%d mode selected\n", __func__,
870 cam->width, cam->height);
871 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
872 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
873 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
874 cam->vb_vidq.field = f->fmt.pix.field;
876 if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
878 else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
884 m1[2].value = 0xf000 + mode;
885 m2[1].value = 0xf000 + mode;
887 /* special case for METHOD3, the modes are different */
888 if (cam->method == METHOD3) {
891 m2[1].value = 0xf000 + 4;
894 m2[1].value = 0xf000 + 0;
897 m2[1].value = 0xf000 + 1;
902 header2[437] = cam->height / 256;
903 header2[438] = cam->height % 256;
904 header2[439] = cam->width / 256;
905 header2[440] = cam->width % 256;
907 for (i = 0; init[cam->method][i].size != -1; i++) {
909 send_control_msg(cam->udev, 1, init[cam->method][i].value,
910 0, init[cam->method][i].bytes,
911 init[cam->method][i].size);
913 dev_err(&cam->udev->dev,
914 "error during resolution change sequence: %d\n", i);
919 /* Added some delay here, since opening/closing the camera quickly,
920 * like Ekiga does during its startup, can crash the webcam
927 mutex_unlock(&q->vb_lock);
929 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
930 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
935 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
936 struct v4l2_requestbuffers *p)
938 struct zr364xx_camera *cam = video_drvdata(file);
940 if (cam->owner && cam->owner != priv)
942 return videobuf_reqbufs(&cam->vb_vidq, p);
945 static int zr364xx_vidioc_querybuf(struct file *file,
947 struct v4l2_buffer *p)
950 struct zr364xx_camera *cam = video_drvdata(file);
951 rc = videobuf_querybuf(&cam->vb_vidq, p);
955 static int zr364xx_vidioc_qbuf(struct file *file,
957 struct v4l2_buffer *p)
960 struct zr364xx_camera *cam = video_drvdata(file);
961 _DBG("%s\n", __func__);
962 if (cam->owner && cam->owner != priv)
964 rc = videobuf_qbuf(&cam->vb_vidq, p);
968 static int zr364xx_vidioc_dqbuf(struct file *file,
970 struct v4l2_buffer *p)
973 struct zr364xx_camera *cam = video_drvdata(file);
974 _DBG("%s\n", __func__);
975 if (cam->owner && cam->owner != priv)
977 rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
981 static void read_pipe_completion(struct urb *purb)
983 struct zr364xx_pipeinfo *pipe_info;
984 struct zr364xx_camera *cam;
987 pipe_info = purb->context;
988 _DBG("%s %p, status %d\n", __func__, purb, purb->status);
989 if (pipe_info == NULL) {
990 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
994 cam = pipe_info->cam;
996 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
1000 /* if shutting down, do not resubmit, exit immediately */
1001 if (purb->status == -ESHUTDOWN) {
1002 DBG("%s, err shutdown\n", __func__);
1003 pipe_info->err_count++;
1007 if (pipe_info->state == 0) {
1008 DBG("exiting USB pipe\n");
1012 if (purb->actual_length > pipe_info->transfer_size) {
1013 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1017 if (purb->status == 0)
1018 zr364xx_read_video_callback(cam, pipe_info, purb);
1020 pipe_info->err_count++;
1021 DBG("%s: failed URB %d\n", __func__, purb->status);
1024 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1027 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1029 pipe_info->transfer_buffer,
1030 pipe_info->transfer_size,
1031 read_pipe_completion, pipe_info);
1033 if (pipe_info->state != 0) {
1034 purb->status = usb_submit_urb(pipe_info->stream_urb,
1038 dev_err(&cam->udev->dev,
1039 "error submitting urb (error=%i)\n",
1042 DBG("read pipe complete state 0\n");
1045 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1049 struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1050 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1051 DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1053 pipe_info->state = 1;
1054 pipe_info->err_count = 0;
1055 pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1056 if (!pipe_info->stream_urb)
1058 /* transfer buffer allocated in board_init */
1059 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1061 pipe_info->transfer_buffer,
1062 pipe_info->transfer_size,
1063 read_pipe_completion, pipe_info);
1065 DBG("submitting URB %p\n", pipe_info->stream_urb);
1066 retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1068 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1075 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1077 struct zr364xx_pipeinfo *pipe_info;
1080 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1083 DBG("stop read pipe\n");
1084 pipe_info = cam->pipe;
1086 if (pipe_info->state != 0)
1087 pipe_info->state = 0;
1089 if (pipe_info->stream_urb) {
1091 usb_kill_urb(pipe_info->stream_urb);
1092 usb_free_urb(pipe_info->stream_urb);
1093 pipe_info->stream_urb = NULL;
1099 /* starts acquisition process */
1100 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1104 DBG("start acquire\n");
1106 cam->last_frame = -1;
1108 for (j = 0; j < FRAMES; j++) {
1109 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1110 cam->buffer.frame[j].cur_size = 0;
1116 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1122 static int zr364xx_prepare(struct zr364xx_camera *cam)
1127 for (i = 0; init[cam->method][i].size != -1; i++) {
1128 res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
1129 0, init[cam->method][i].bytes,
1130 init[cam->method][i].size);
1132 dev_err(&cam->udev->dev,
1133 "error during open sequence: %d\n", i);
1139 cam->last_frame = -1;
1141 cam->frame_count = 0;
1142 for (j = 0; j < FRAMES; j++) {
1143 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1144 cam->buffer.frame[j].cur_size = 0;
1146 v4l2_ctrl_handler_setup(&cam->ctrl_handler);
1150 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1151 enum v4l2_buf_type type)
1153 struct zr364xx_camera *cam = video_drvdata(file);
1156 DBG("%s\n", __func__);
1158 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1161 if (cam->owner && cam->owner != priv)
1164 res = zr364xx_prepare(cam);
1167 res = videobuf_streamon(&cam->vb_vidq);
1169 zr364xx_start_acquire(cam);
1170 cam->owner = file->private_data;
1175 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1176 enum v4l2_buf_type type)
1178 struct zr364xx_camera *cam = video_drvdata(file);
1180 DBG("%s\n", __func__);
1181 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1183 if (cam->owner && cam->owner != priv)
1185 zr364xx_stop_acquire(cam);
1186 return videobuf_streamoff(&cam->vb_vidq);
1190 /* open the camera */
1191 static int zr364xx_open(struct file *file)
1193 struct zr364xx_camera *cam = video_drvdata(file);
1196 DBG("%s\n", __func__);
1198 if (mutex_lock_interruptible(&cam->lock))
1199 return -ERESTARTSYS;
1201 err = v4l2_fh_open(file);
1205 /* Added some delay here, since opening/closing the camera quickly,
1206 * like Ekiga does during its startup, can crash the webcam
1212 mutex_unlock(&cam->lock);
1213 DBG("%s: %d\n", __func__, err);
1217 static void zr364xx_release(struct v4l2_device *v4l2_dev)
1219 struct zr364xx_camera *cam =
1220 container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
1223 v4l2_device_unregister(&cam->v4l2_dev);
1225 videobuf_mmap_free(&cam->vb_vidq);
1227 /* release sys buffers */
1228 for (i = 0; i < FRAMES; i++) {
1229 if (cam->buffer.frame[i].lpvbits) {
1230 DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1231 vfree(cam->buffer.frame[i].lpvbits);
1233 cam->buffer.frame[i].lpvbits = NULL;
1236 v4l2_ctrl_handler_free(&cam->ctrl_handler);
1237 /* release transfer buffer */
1238 kfree(cam->pipe->transfer_buffer);
1242 /* release the camera */
1243 static int zr364xx_close(struct file *file)
1245 struct zr364xx_camera *cam;
1246 struct usb_device *udev;
1249 DBG("%s\n", __func__);
1250 cam = video_drvdata(file);
1252 mutex_lock(&cam->lock);
1255 if (file->private_data == cam->owner) {
1256 /* turn off stream */
1258 zr364xx_stop_acquire(cam);
1259 videobuf_streamoff(&cam->vb_vidq);
1261 for (i = 0; i < 2; i++) {
1262 send_control_msg(udev, 1, init[cam->method][i].value,
1263 0, init[cam->method][i].bytes,
1264 init[cam->method][i].size);
1269 /* Added some delay here, since opening/closing the camera quickly,
1270 * like Ekiga does during its startup, can crash the webcam
1273 mutex_unlock(&cam->lock);
1274 return v4l2_fh_release(file);
1278 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1280 struct zr364xx_camera *cam = video_drvdata(file);
1284 DBG("%s: cam == NULL\n", __func__);
1287 DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1289 ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1291 DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1292 (unsigned long)vma->vm_start,
1293 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1297 static unsigned int zr364xx_poll(struct file *file,
1298 struct poll_table_struct *wait)
1300 struct zr364xx_camera *cam = video_drvdata(file);
1301 struct videobuf_queue *q = &cam->vb_vidq;
1302 unsigned res = v4l2_ctrl_poll(file, wait);
1304 _DBG("%s\n", __func__);
1306 return res | videobuf_poll_stream(file, q, wait);
1309 static const struct v4l2_ctrl_ops zr364xx_ctrl_ops = {
1310 .s_ctrl = zr364xx_s_ctrl,
1313 static const struct v4l2_file_operations zr364xx_fops = {
1314 .owner = THIS_MODULE,
1315 .open = zr364xx_open,
1316 .release = zr364xx_close,
1317 .read = zr364xx_read,
1318 .mmap = zr364xx_mmap,
1319 .unlocked_ioctl = video_ioctl2,
1320 .poll = zr364xx_poll,
1323 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1324 .vidioc_querycap = zr364xx_vidioc_querycap,
1325 .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1326 .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1327 .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
1328 .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
1329 .vidioc_enum_input = zr364xx_vidioc_enum_input,
1330 .vidioc_g_input = zr364xx_vidioc_g_input,
1331 .vidioc_s_input = zr364xx_vidioc_s_input,
1332 .vidioc_streamon = zr364xx_vidioc_streamon,
1333 .vidioc_streamoff = zr364xx_vidioc_streamoff,
1334 .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
1335 .vidioc_querybuf = zr364xx_vidioc_querybuf,
1336 .vidioc_qbuf = zr364xx_vidioc_qbuf,
1337 .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
1338 .vidioc_log_status = v4l2_ctrl_log_status,
1339 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1340 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1343 static struct video_device zr364xx_template = {
1344 .name = DRIVER_DESC,
1345 .fops = &zr364xx_fops,
1346 .ioctl_ops = &zr364xx_ioctl_ops,
1347 .release = video_device_release_empty,
1352 /*******************/
1353 /* USB integration */
1354 /*******************/
1355 static int zr364xx_board_init(struct zr364xx_camera *cam)
1357 struct zr364xx_pipeinfo *pipe = cam->pipe;
1360 DBG("board init: %p\n", cam);
1361 memset(pipe, 0, sizeof(*pipe));
1363 pipe->transfer_size = BUFFER_SIZE;
1365 pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1367 if (pipe->transfer_buffer == NULL) {
1368 DBG("out of memory!\n");
1373 cam->frame_count = 0;
1375 /*** start create system buffers ***/
1376 for (i = 0; i < FRAMES; i++) {
1377 /* always allocate maximum size for system buffers */
1378 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1380 DBG("valloc %p, idx %lu, pdata %p\n",
1381 &cam->buffer.frame[i], i,
1382 cam->buffer.frame[i].lpvbits);
1383 if (cam->buffer.frame[i].lpvbits == NULL) {
1384 printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1385 "Using less frames\n");
1391 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1392 kfree(cam->pipe->transfer_buffer);
1393 cam->pipe->transfer_buffer = NULL;
1396 cam->buffer.dwFrames = i;
1398 /* make sure internal states are set */
1399 for (i = 0; i < FRAMES; i++) {
1400 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1401 cam->buffer.frame[i].cur_size = 0;
1405 cam->last_frame = -1;
1406 /*** end create system buffers ***/
1408 /* start read pipe */
1409 zr364xx_start_readpipe(cam);
1410 DBG(": board initialized\n");
1414 static int zr364xx_probe(struct usb_interface *intf,
1415 const struct usb_device_id *id)
1417 struct usb_device *udev = interface_to_usbdev(intf);
1418 struct zr364xx_camera *cam = NULL;
1419 struct usb_host_interface *iface_desc;
1420 struct usb_endpoint_descriptor *endpoint;
1421 struct v4l2_ctrl_handler *hdl;
1425 DBG("probing...\n");
1427 dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1428 dev_info(&intf->dev, "model %04x:%04x detected\n",
1429 le16_to_cpu(udev->descriptor.idVendor),
1430 le16_to_cpu(udev->descriptor.idProduct));
1432 cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1434 dev_err(&udev->dev, "cam: out of memory !\n");
1438 cam->v4l2_dev.release = zr364xx_release;
1439 err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
1441 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1445 hdl = &cam->ctrl_handler;
1446 v4l2_ctrl_handler_init(hdl, 1);
1447 v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
1448 V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
1451 dev_err(&udev->dev, "couldn't register control\n");
1454 /* save the init method used by this camera */
1455 cam->method = id->driver_info;
1456 mutex_init(&cam->lock);
1457 cam->vdev = zr364xx_template;
1458 cam->vdev.lock = &cam->lock;
1459 cam->vdev.v4l2_dev = &cam->v4l2_dev;
1460 cam->vdev.ctrl_handler = &cam->ctrl_handler;
1461 video_set_drvdata(&cam->vdev, cam);
1467 dev_info(&udev->dev, "160x120 mode selected\n");
1472 dev_info(&udev->dev, "640x480 mode selected\n");
1477 dev_info(&udev->dev, "320x240 mode selected\n");
1484 m1[2].value = 0xf000 + mode;
1485 m2[1].value = 0xf000 + mode;
1487 /* special case for METHOD3, the modes are different */
1488 if (cam->method == METHOD3) {
1491 m2[1].value = 0xf000 + 4;
1494 m2[1].value = 0xf000 + 0;
1497 m2[1].value = 0xf000 + 1;
1502 header2[437] = cam->height / 256;
1503 header2[438] = cam->height % 256;
1504 header2[439] = cam->width / 256;
1505 header2[440] = cam->width % 256;
1509 DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1511 /* set up the endpoint information */
1512 iface_desc = intf->cur_altsetting;
1513 DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1514 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1515 endpoint = &iface_desc->endpoint[i].desc;
1516 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1517 /* we found the bulk in endpoint */
1518 cam->read_endpoint = endpoint->bEndpointAddress;
1522 if (!cam->read_endpoint) {
1524 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1529 INIT_LIST_HEAD(&cam->vidq.active);
1530 cam->vidq.cam = cam;
1532 usb_set_intfdata(intf, cam);
1534 /* load zr364xx board specific */
1535 err = zr364xx_board_init(cam);
1537 err = v4l2_ctrl_handler_setup(hdl);
1541 spin_lock_init(&cam->slock);
1545 videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1547 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1549 sizeof(struct zr364xx_buffer), cam, &cam->lock);
1551 err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1553 dev_err(&udev->dev, "video_register_device failed\n");
1557 dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1558 video_device_node_name(&cam->vdev));
1562 v4l2_ctrl_handler_free(hdl);
1563 v4l2_device_unregister(&cam->v4l2_dev);
1569 static void zr364xx_disconnect(struct usb_interface *intf)
1571 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1573 mutex_lock(&cam->lock);
1574 usb_set_intfdata(intf, NULL);
1575 dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1576 video_unregister_device(&cam->vdev);
1577 v4l2_device_disconnect(&cam->v4l2_dev);
1579 /* stops the read pipe if it is running */
1581 zr364xx_stop_acquire(cam);
1583 zr364xx_stop_readpipe(cam);
1584 mutex_unlock(&cam->lock);
1585 v4l2_device_put(&cam->v4l2_dev);
1590 static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
1592 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1594 cam->was_streaming = cam->b_acquire;
1595 if (!cam->was_streaming)
1597 zr364xx_stop_acquire(cam);
1598 zr364xx_stop_readpipe(cam);
1602 static int zr364xx_resume(struct usb_interface *intf)
1604 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1607 if (!cam->was_streaming)
1610 zr364xx_start_readpipe(cam);
1611 res = zr364xx_prepare(cam);
1613 zr364xx_start_acquire(cam);
1618 /**********************/
1619 /* Module integration */
1620 /**********************/
1622 static struct usb_driver zr364xx_driver = {
1624 .probe = zr364xx_probe,
1625 .disconnect = zr364xx_disconnect,
1627 .suspend = zr364xx_suspend,
1628 .resume = zr364xx_resume,
1629 .reset_resume = zr364xx_resume,
1631 .id_table = device_table
1634 module_usb_driver(zr364xx_driver);
1636 MODULE_AUTHOR(DRIVER_AUTHOR);
1637 MODULE_DESCRIPTION(DRIVER_DESC);
1638 MODULE_LICENSE("GPL");
1639 MODULE_VERSION(DRIVER_VERSION);