Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/drivers/media/usb/zr364xx/zr364xx.c

  1 /*
  2  * Zoran 364xx based USB webcam module version 0.73
  3  *
  4  * Allows you to use your USB webcam with V4L2 applications
  5  * This is still in heavy developpement !
  6  *
  7  * Copyright (C) 2004  Antoine Jacquet <royale@zerezo.com>
  8  * http://royale.zerezo.com/zr364xx/
  9  *
 10  * Heavily inspired by usb-skeleton.c, vicam.c, cpia.c and spca50x.c drivers
 11  * V4L2 version inspired by meye.c driver
 12  *
 13  * Some video buffer code by Lamarque based on s2255drv.c and vivi.c drivers.
 14  *
 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.
 19  *
 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.
 24  *
 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
 28  */
 29 
 30 
 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>
 45 
 46 
 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"
 51 
 52 
 53 /* Camera */
 54 #define FRAMES 1
 55 #define MAX_FRAME_SIZE 200000
 56 #define BUFFER_SIZE 0x1000
 57 #define CTRL_TIMEOUT 500
 58 
 59 #define ZR364XX_DEF_BUFS        4
 60 #define ZR364XX_READ_IDLE       0
 61 #define ZR364XX_READ_FRAME      1
 62 
 63 /* Debug macro */
 64 #define DBG(fmt, args...) \
 65         do { \
 66                 if (debug) { \
 67                         printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
 68                 } \
 69         } while (0)
 70 
 71 /*#define FULL_DEBUG 1*/
 72 #ifdef FULL_DEBUG
 73 #define _DBG DBG
 74 #else
 75 #define _DBG(fmt, args...)
 76 #endif
 77 
 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 */
 80 #define METHOD0 0
 81 #define METHOD1 1
 82 #define METHOD2 2
 83 #define METHOD3 3
 84 
 85 
 86 /* Module parameters */
 87 static int debug;
 88 static int mode;
 89 
 90 
 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");
 96 
 97 
 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 */
123 };
124 
125 MODULE_DEVICE_TABLE(usb, device_table);
126 
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 */
133 };
134 
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 */
139 };
140 
141 struct zr364xx_dmaqueue {
142         struct list_head        active;
143         struct zr364xx_camera   *cam;
144 };
145 
146 struct zr364xx_pipeinfo {
147         u32 transfer_size;
148         u8 *transfer_buffer;
149         u32 state;
150         void *stream_urb;
151         void *cam;      /* back pointer to zr364xx_camera struct */
152         u32 err_count;
153         u32 idx;
154 };
155 
156 struct zr364xx_fmt {
157         char *name;
158         u32 fourcc;
159         int depth;
160 };
161 
162 /* image formats.  */
163 static const struct zr364xx_fmt formats[] = {
164         {
165                 .name = "JPG",
166                 .fourcc = V4L2_PIX_FMT_JPEG,
167                 .depth = 24
168         }
169 };
170 
171 /* Camera stuff */
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 */
179         int nb;
180         struct zr364xx_bufferi          buffer;
181         int skip;
182         int width;
183         int height;
184         int method;
185         struct mutex lock;
186 
187         spinlock_t              slock;
188         struct zr364xx_dmaqueue vidq;
189         int                     last_frame;
190         int                     cur_frame;
191         unsigned long           frame_count;
192         int                     b_acquire;
193         struct zr364xx_pipeinfo pipe[1];
194 
195         u8                      read_endpoint;
196 
197         const struct zr364xx_fmt *fmt;
198         struct videobuf_queue   vb_vidq;
199         bool was_streaming;
200 };
201 
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;
207 };
208 
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)
212 {
213         int status;
214 
215         unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
216         if (!transfer_buffer) {
217                 dev_err(&udev->dev, "kmalloc(%d) failed\n", size);
218                 return -ENOMEM;
219         }
220 
221         memcpy(transfer_buffer, cp, size);
222 
223         status = usb_control_msg(udev,
224                                  usb_sndctrlpipe(udev, 0),
225                                  request,
226                                  USB_DIR_OUT | USB_TYPE_VENDOR |
227                                  USB_RECIP_DEVICE, value, index,
228                                  transfer_buffer, size, CTRL_TIMEOUT);
229 
230         kfree(transfer_buffer);
231         return status;
232 }
233 
234 
235 /* Control messages sent to the camera to initialize it
236  * and launch the capture */
237 typedef struct {
238         unsigned int value;
239         unsigned int size;
240         unsigned char *bytes;
241 } message;
242 
243 /* method 0 */
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[] = {
248         {0x1f30, 0, NULL},
249         {0xd000, 0, NULL},
250         {0x3370, sizeof(m0d1), m0d1},
251         {0x2000, 0, NULL},
252         {0x2f0f, 0, NULL},
253         {0x2610, sizeof(m0d2), m0d2},
254         {0xe107, 0, NULL},
255         {0x2502, 0, NULL},
256         {0x1f70, 0, NULL},
257         {0xd000, 0, NULL},
258         {0x9a01, sizeof(m0d3), m0d3},
259         {-1, -1, NULL}
260 };
261 
262 /* method 1 */
263 static unsigned char m1d1[] = { 0xff, 0xff };
264 static unsigned char m1d2[] = { 0x00, 0x00 };
265 static message m1[] = {
266         {0x1f30, 0, NULL},
267         {0xd000, 0, NULL},
268         {0xf000, 0, NULL},
269         {0x2000, 0, NULL},
270         {0x2f0f, 0, NULL},
271         {0x2650, 0, NULL},
272         {0xe107, 0, NULL},
273         {0x2502, sizeof(m1d1), m1d1},
274         {0x1f70, 0, NULL},
275         {0xd000, 0, NULL},
276         {0xd000, 0, NULL},
277         {0xd000, 0, NULL},
278         {0x9a01, sizeof(m1d2), m1d2},
279         {-1, -1, NULL}
280 };
281 
282 /* method 2 */
283 static unsigned char m2d1[] = { 0xff, 0xff };
284 static message m2[] = {
285         {0x1f30, 0, NULL},
286         {0xf000, 0, NULL},
287         {0x2000, 0, NULL},
288         {0x2f0f, 0, NULL},
289         {0x2650, 0, NULL},
290         {0xe107, 0, NULL},
291         {0x2502, sizeof(m2d1), m2d1},
292         {0x1f70, 0, NULL},
293         {-1, -1, NULL}
294 };
295 
296 /* init table */
297 static message *init[4] = { m0, m1, m2, m2 };
298 
299 
300 /* JPEG static data in header (Huffman table, etc) */
301 static unsigned char header1[] = {
302         0xFF, 0xD8,
303         /*
304         0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
305         0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
306         */
307         0xFF, 0xDB, 0x00, 0x84
308 };
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,
352         0x00, 0x3F, 0x00
353 };
354 static unsigned char header3;
355 
356 /* ------------------------------------------------------------------
357    Videobuf operations
358    ------------------------------------------------------------------*/
359 
360 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
361                         unsigned int *size)
362 {
363         struct zr364xx_camera *cam = vq->priv_data;
364 
365         *size = cam->width * cam->height * (cam->fmt->depth >> 3);
366 
367         if (*count == 0)
368                 *count = ZR364XX_DEF_BUFS;
369 
370         if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
371                 *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
372 
373         return 0;
374 }
375 
376 static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
377 {
378         _DBG("%s\n", __func__);
379 
380         BUG_ON(in_interrupt());
381 
382         videobuf_vmalloc_free(&buf->vb);
383         buf->vb.state = VIDEOBUF_NEEDS_INIT;
384 }
385 
386 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
387                           enum v4l2_field field)
388 {
389         struct zr364xx_camera *cam = vq->priv_data;
390         struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
391                                                   vb);
392         int rc;
393 
394         DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
395             cam->fmt->name : "");
396         if (cam->fmt == NULL)
397                 return -EINVAL;
398 
399         buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
400 
401         if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
402                 DBG("invalid buffer prepare\n");
403                 return -EINVAL;
404         }
405 
406         buf->fmt = cam->fmt;
407         buf->vb.width = cam->width;
408         buf->vb.height = cam->height;
409         buf->vb.field = field;
410 
411         if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
412                 rc = videobuf_iolock(vq, &buf->vb, NULL);
413                 if (rc < 0)
414                         goto fail;
415         }
416 
417         buf->vb.state = VIDEOBUF_PREPARED;
418         return 0;
419 fail:
420         free_buffer(vq, buf);
421         return rc;
422 }
423 
424 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
425 {
426         struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
427                                                   vb);
428         struct zr364xx_camera *cam = vq->priv_data;
429 
430         _DBG("%s\n", __func__);
431 
432         buf->vb.state = VIDEOBUF_QUEUED;
433         list_add_tail(&buf->vb.queue, &cam->vidq.active);
434 }
435 
436 static void buffer_release(struct videobuf_queue *vq,
437                            struct videobuf_buffer *vb)
438 {
439         struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
440                                                   vb);
441 
442         _DBG("%s\n", __func__);
443         free_buffer(vq, buf);
444 }
445 
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,
451 };
452 
453 /********************/
454 /* V4L2 integration */
455 /********************/
456 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
457                                    enum v4l2_buf_type type);
458 
459 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
460                             loff_t * ppos)
461 {
462         struct zr364xx_camera *cam = video_drvdata(file);
463         int err = 0;
464 
465         _DBG("%s\n", __func__);
466 
467         if (!buf)
468                 return -EINVAL;
469 
470         if (!count)
471                 return -EINVAL;
472 
473         if (mutex_lock_interruptible(&cam->lock))
474                 return -ERESTARTSYS;
475 
476         err = zr364xx_vidioc_streamon(file, file->private_data,
477                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);
478         if (err == 0) {
479                 DBG("%s: reading %d bytes at pos %d.\n", __func__,
480                                 (int) count, (int) *ppos);
481 
482                 /* NoMan Sux ! */
483                 err = videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
484                                         file->f_flags & O_NONBLOCK);
485         }
486         mutex_unlock(&cam->lock);
487         return err;
488 }
489 
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/
496  *
497  */
498 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
499                              struct zr364xx_buffer *buf,
500                              int jpgsize)
501 {
502         int pos = 0;
503         const char *tmpbuf;
504         char *vbuf = videobuf_to_vmalloc(&buf->vb);
505         unsigned long last_frame;
506 
507         if (!vbuf)
508                 return;
509 
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);
517                         break;
518                 default:
519                         printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
520                 }
521                 cam->last_frame = -1;
522         } else {
523                 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
524                 return;
525         }
526         DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
527                 (unsigned long)vbuf, pos);
528         /* tell v4l buffer was filled */
529 
530         buf->vb.field_count = cam->frame_count * 2;
531         v4l2_get_timestamp(&buf->vb.ts);
532         buf->vb.state = VIDEOBUF_DONE;
533 }
534 
535 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
536 {
537         struct zr364xx_dmaqueue *dma_q = &cam->vidq;
538         struct zr364xx_buffer *buf;
539         unsigned long flags = 0;
540         int rc = 0;
541 
542         DBG("wakeup: %p\n", &dma_q);
543         spin_lock_irqsave(&cam->slock, flags);
544 
545         if (list_empty(&dma_q->active)) {
546                 DBG("No active queue to serve\n");
547                 rc = -1;
548                 goto unlock;
549         }
550         buf = list_entry(dma_q->active.next,
551                          struct zr364xx_buffer, vb.queue);
552 
553         if (!waitqueue_active(&buf->vb.done)) {
554                 /* no one active */
555                 rc = -1;
556                 goto unlock;
557         }
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);
564 unlock:
565         spin_unlock_irqrestore(&cam->slock, flags);
566         return rc;
567 }
568 
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
572  * function again).
573  */
574 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
575                                         struct zr364xx_pipeinfo *pipe_info,
576                                         struct urb *purb)
577 {
578         unsigned char *pdest;
579         unsigned char *psrc;
580         s32 idx = -1;
581         struct zr364xx_framei *frm;
582         int i = 0;
583         unsigned char *ptr = NULL;
584 
585         _DBG("buffer to user\n");
586         idx = cam->cur_frame;
587         frm = &cam->buffer.frame[idx];
588 
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++)
593                         swab16s(buf + i);
594         }
595 
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;
600                 return -EINVAL;
601         }
602 
603         psrc = (u8 *)pipe_info->transfer_buffer;
604         ptr = pdest = frm->lpvbits;
605 
606         if (frm->ulState == ZR364XX_READ_IDLE) {
607                 frm->ulState = ZR364XX_READ_FRAME;
608                 frm->cur_size = 0;
609 
610                 _DBG("jpeg header, ");
611                 memcpy(ptr, header1, sizeof(header1));
612                 ptr += sizeof(header1);
613                 header3 = 0;
614                 memcpy(ptr, &header3, 1);
615                 ptr++;
616                 memcpy(ptr, psrc, 64);
617                 ptr += 64;
618                 header3 = 1;
619                 memcpy(ptr, &header3, 1);
620                 ptr++;
621                 memcpy(ptr, psrc + 64, 64);
622                 ptr += 64;
623                 memcpy(ptr, header2, sizeof(header2));
624                 ptr += sizeof(header2);
625                 memcpy(ptr, psrc + 128,
626                        purb->actual_length - 128);
627                 ptr += purb->actual_length - 128;
628                 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
629                     psrc[0], psrc[1], psrc[2],
630                     psrc[3], psrc[4], psrc[5],
631                     psrc[6], psrc[7], psrc[8]);
632                 frm->cur_size = ptr - pdest;
633         } else {
634                 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
635                         dev_info(&cam->udev->dev,
636                                  "%s: buffer (%d bytes) too small to hold "
637                                  "frame data. Discarding frame data.\n",
638                                  __func__, MAX_FRAME_SIZE);
639                 } else {
640                         pdest += frm->cur_size;
641                         memcpy(pdest, psrc, purb->actual_length);
642                         frm->cur_size += purb->actual_length;
643                 }
644         }
645         /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
646                 purb->actual_length);*/
647 
648         if (purb->actual_length < pipe_info->transfer_size) {
649                 _DBG("****************Buffer[%d]full*************\n", idx);
650                 cam->last_frame = cam->cur_frame;
651                 cam->cur_frame++;
652                 /* end of system frame ring buffer, start at zero */
653                 if (cam->cur_frame == cam->buffer.dwFrames)
654                         cam->cur_frame = 0;
655 
656                 /* frame ready */
657                 /* go back to find the JPEG EOI marker */
658                 ptr = pdest = frm->lpvbits;
659                 ptr += frm->cur_size - 2;
660                 while (ptr > pdest) {
661                         if (*ptr == 0xFF && *(ptr + 1) == 0xD9
662                             && *(ptr + 2) == 0xFF)
663                                 break;
664                         ptr--;
665                 }
666                 if (ptr == pdest)
667                         DBG("No EOI marker\n");
668 
669                 /* Sometimes there is junk data in the middle of the picture,
670                  * we want to skip this bogus frames */
671                 while (ptr > pdest) {
672                         if (*ptr == 0xFF && *(ptr + 1) == 0xFF
673                             && *(ptr + 2) == 0xFF)
674                                 break;
675                         ptr--;
676                 }
677                 if (ptr != pdest) {
678                         DBG("Bogus frame ? %d\n", ++(cam->nb));
679                 } else if (cam->b_acquire) {
680                         /* we skip the 2 first frames which are usually buggy */
681                         if (cam->skip)
682                                 cam->skip--;
683                         else {
684                                 _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
685                                     frm->cur_size,
686                                     pdest[0], pdest[1], pdest[2], pdest[3],
687                                     pdest[4], pdest[5], pdest[6], pdest[7]);
688 
689                                 zr364xx_got_frame(cam, frm->cur_size);
690                         }
691                 }
692                 cam->frame_count++;
693                 frm->ulState = ZR364XX_READ_IDLE;
694                 frm->cur_size = 0;
695         }
696         /* done successfully */
697         return 0;
698 }
699 
700 static int zr364xx_vidioc_querycap(struct file *file, void *priv,
701                                    struct v4l2_capability *cap)
702 {
703         struct zr364xx_camera *cam = video_drvdata(file);
704 
705         strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
706         strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
707         strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
708                 sizeof(cap->bus_info));
709         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
710                             V4L2_CAP_READWRITE |
711                             V4L2_CAP_STREAMING;
712         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
713 
714         return 0;
715 }
716 
717 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
718                                      struct v4l2_input *i)
719 {
720         if (i->index != 0)
721                 return -EINVAL;
722         strcpy(i->name, DRIVER_DESC " Camera");
723         i->type = V4L2_INPUT_TYPE_CAMERA;
724         return 0;
725 }
726 
727 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
728                                   unsigned int *i)
729 {
730         *i = 0;
731         return 0;
732 }
733 
734 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
735                                   unsigned int i)
736 {
737         if (i != 0)
738                 return -EINVAL;
739         return 0;
740 }
741 
742 static int zr364xx_s_ctrl(struct v4l2_ctrl *ctrl)
743 {
744         struct zr364xx_camera *cam =
745                 container_of(ctrl->handler, struct zr364xx_camera, ctrl_handler);
746         int temp;
747 
748         switch (ctrl->id) {
749         case V4L2_CID_BRIGHTNESS:
750                 /* hardware brightness */
751                 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
752                 temp = (0x60 << 8) + 127 - ctrl->val;
753                 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
754                 break;
755         default:
756                 return -EINVAL;
757         }
758 
759         return 0;
760 }
761 
762 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
763                                        void *priv, struct v4l2_fmtdesc *f)
764 {
765         if (f->index > 0)
766                 return -EINVAL;
767         f->flags = V4L2_FMT_FLAG_COMPRESSED;
768         strcpy(f->description, formats[0].name);
769         f->pixelformat = formats[0].fourcc;
770         return 0;
771 }
772 
773 static char *decode_fourcc(__u32 pixelformat, char *buf)
774 {
775         buf[0] = pixelformat & 0xff;
776         buf[1] = (pixelformat >> 8) & 0xff;
777         buf[2] = (pixelformat >> 16) & 0xff;
778         buf[3] = (pixelformat >> 24) & 0xff;
779         buf[4] = '\0';
780         return buf;
781 }
782 
783 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
784                                       struct v4l2_format *f)
785 {
786         struct zr364xx_camera *cam = video_drvdata(file);
787         char pixelformat_name[5];
788 
789         if (cam == NULL)
790                 return -ENODEV;
791 
792         if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
793                 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
794                     decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
795                 return -EINVAL;
796         }
797 
798         if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
799             !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
800                 f->fmt.pix.width = 320;
801                 f->fmt.pix.height = 240;
802         }
803 
804         f->fmt.pix.field = V4L2_FIELD_NONE;
805         f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
806         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
807         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
808         DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
809             decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
810             f->fmt.pix.field);
811         return 0;
812 }
813 
814 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
815                                     struct v4l2_format *f)
816 {
817         struct zr364xx_camera *cam;
818 
819         if (file == NULL)
820                 return -ENODEV;
821         cam = video_drvdata(file);
822 
823         f->fmt.pix.pixelformat = formats[0].fourcc;
824         f->fmt.pix.field = V4L2_FIELD_NONE;
825         f->fmt.pix.width = cam->width;
826         f->fmt.pix.height = cam->height;
827         f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
828         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
829         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
830         return 0;
831 }
832 
833 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
834                                     struct v4l2_format *f)
835 {
836         struct zr364xx_camera *cam = video_drvdata(file);
837         struct videobuf_queue *q = &cam->vb_vidq;
838         char pixelformat_name[5];
839         int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
840         int i;
841 
842         if (ret < 0)
843                 return ret;
844 
845         mutex_lock(&q->vb_lock);
846 
847         if (videobuf_queue_is_busy(&cam->vb_vidq)) {
848                 DBG("%s queue busy\n", __func__);
849                 ret = -EBUSY;
850                 goto out;
851         }
852 
853         if (cam->owner) {
854                 DBG("%s can't change format after started\n", __func__);
855                 ret = -EBUSY;
856                 goto out;
857         }
858 
859         cam->width = f->fmt.pix.width;
860         cam->height = f->fmt.pix.height;
861         DBG("%s: %dx%d mode selected\n", __func__,
862                  cam->width, cam->height);
863         f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
864         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
865         f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
866         cam->vb_vidq.field = f->fmt.pix.field;
867 
868         if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
869                 mode = 1;
870         else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
871                 mode = 2;
872         else
873                 mode = 0;
874 
875         m0d1[0] = mode;
876         m1[2].value = 0xf000 + mode;
877         m2[1].value = 0xf000 + mode;
878 
879         /* special case for METHOD3, the modes are different */
880         if (cam->method == METHOD3) {
881                 switch (mode) {
882                 case 1:
883                         m2[1].value = 0xf000 + 4;
884                         break;
885                 case 2:
886                         m2[1].value = 0xf000 + 0;
887                         break;
888                 default:
889                         m2[1].value = 0xf000 + 1;
890                         break;
891                 }
892         }
893 
894         header2[437] = cam->height / 256;
895         header2[438] = cam->height % 256;
896         header2[439] = cam->width / 256;
897         header2[440] = cam->width % 256;
898 
899         for (i = 0; init[cam->method][i].size != -1; i++) {
900                 ret =
901                     send_control_msg(cam->udev, 1, init[cam->method][i].value,
902                                      0, init[cam->method][i].bytes,
903                                      init[cam->method][i].size);
904                 if (ret < 0) {
905                         dev_err(&cam->udev->dev,
906                            "error during resolution change sequence: %d\n", i);
907                         goto out;
908                 }
909         }
910 
911         /* Added some delay here, since opening/closing the camera quickly,
912          * like Ekiga does during its startup, can crash the webcam
913          */
914         mdelay(100);
915         cam->skip = 2;
916         ret = 0;
917 
918 out:
919         mutex_unlock(&q->vb_lock);
920 
921         DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
922             decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
923             f->fmt.pix.field);
924         return ret;
925 }
926 
927 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
928                           struct v4l2_requestbuffers *p)
929 {
930         struct zr364xx_camera *cam = video_drvdata(file);
931 
932         if (cam->owner && cam->owner != priv)
933                 return -EBUSY;
934         return videobuf_reqbufs(&cam->vb_vidq, p);
935 }
936 
937 static int zr364xx_vidioc_querybuf(struct file *file,
938                                 void *priv,
939                                 struct v4l2_buffer *p)
940 {
941         int rc;
942         struct zr364xx_camera *cam = video_drvdata(file);
943         rc = videobuf_querybuf(&cam->vb_vidq, p);
944         return rc;
945 }
946 
947 static int zr364xx_vidioc_qbuf(struct file *file,
948                                 void *priv,
949                                 struct v4l2_buffer *p)
950 {
951         int rc;
952         struct zr364xx_camera *cam = video_drvdata(file);
953         _DBG("%s\n", __func__);
954         if (cam->owner && cam->owner != priv)
955                 return -EBUSY;
956         rc = videobuf_qbuf(&cam->vb_vidq, p);
957         return rc;
958 }
959 
960 static int zr364xx_vidioc_dqbuf(struct file *file,
961                                 void *priv,
962                                 struct v4l2_buffer *p)
963 {
964         int rc;
965         struct zr364xx_camera *cam = video_drvdata(file);
966         _DBG("%s\n", __func__);
967         if (cam->owner && cam->owner != priv)
968                 return -EBUSY;
969         rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
970         return rc;
971 }
972 
973 static void read_pipe_completion(struct urb *purb)
974 {
975         struct zr364xx_pipeinfo *pipe_info;
976         struct zr364xx_camera *cam;
977         int pipe;
978 
979         pipe_info = purb->context;
980         _DBG("%s %p, status %d\n", __func__, purb, purb->status);
981         if (pipe_info == NULL) {
982                 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
983                 return;
984         }
985 
986         cam = pipe_info->cam;
987         if (cam == NULL) {
988                 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
989                 return;
990         }
991 
992         /* if shutting down, do not resubmit, exit immediately */
993         if (purb->status == -ESHUTDOWN) {
994                 DBG("%s, err shutdown\n", __func__);
995                 pipe_info->err_count++;
996                 return;
997         }
998 
999         if (pipe_info->state == 0) {
1000                 DBG("exiting USB pipe\n");
1001                 return;
1002         }
1003 
1004         if (purb->actual_length > pipe_info->transfer_size) {
1005                 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1006                 return;
1007         }
1008 
1009         if (purb->status == 0)
1010                 zr364xx_read_video_callback(cam, pipe_info, purb);
1011         else {
1012                 pipe_info->err_count++;
1013                 DBG("%s: failed URB %d\n", __func__, purb->status);
1014         }
1015 
1016         pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1017 
1018         /* reuse urb */
1019         usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1020                           pipe,
1021                           pipe_info->transfer_buffer,
1022                           pipe_info->transfer_size,
1023                           read_pipe_completion, pipe_info);
1024 
1025         if (pipe_info->state != 0) {
1026                 purb->status = usb_submit_urb(pipe_info->stream_urb,
1027                                               GFP_ATOMIC);
1028 
1029                 if (purb->status)
1030                         dev_err(&cam->udev->dev,
1031                                 "error submitting urb (error=%i)\n",
1032                                 purb->status);
1033         } else
1034                 DBG("read pipe complete state 0\n");
1035 }
1036 
1037 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1038 {
1039         int pipe;
1040         int retval;
1041         struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1042         pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1043         DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1044 
1045         pipe_info->state = 1;
1046         pipe_info->err_count = 0;
1047         pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1048         if (!pipe_info->stream_urb)
1049                 return -ENOMEM;
1050         /* transfer buffer allocated in board_init */
1051         usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1052                           pipe,
1053                           pipe_info->transfer_buffer,
1054                           pipe_info->transfer_size,
1055                           read_pipe_completion, pipe_info);
1056 
1057         DBG("submitting URB %p\n", pipe_info->stream_urb);
1058         retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1059         if (retval) {
1060                 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1061                 return retval;
1062         }
1063 
1064         return 0;
1065 }
1066 
1067 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1068 {
1069         struct zr364xx_pipeinfo *pipe_info;
1070 
1071         if (cam == NULL) {
1072                 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1073                 return;
1074         }
1075         DBG("stop read pipe\n");
1076         pipe_info = cam->pipe;
1077         if (pipe_info) {
1078                 if (pipe_info->state != 0)
1079                         pipe_info->state = 0;
1080 
1081                 if (pipe_info->stream_urb) {
1082                         /* cancel urb */
1083                         usb_kill_urb(pipe_info->stream_urb);
1084                         usb_free_urb(pipe_info->stream_urb);
1085                         pipe_info->stream_urb = NULL;
1086                 }
1087         }
1088         return;
1089 }
1090 
1091 /* starts acquisition process */
1092 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1093 {
1094         int j;
1095 
1096         DBG("start acquire\n");
1097 
1098         cam->last_frame = -1;
1099         cam->cur_frame = 0;
1100         for (j = 0; j < FRAMES; j++) {
1101                 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1102                 cam->buffer.frame[j].cur_size = 0;
1103         }
1104         cam->b_acquire = 1;
1105         return 0;
1106 }
1107 
1108 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1109 {
1110         cam->b_acquire = 0;
1111         return 0;
1112 }
1113 
1114 static int zr364xx_prepare(struct zr364xx_camera *cam)
1115 {
1116         int res;
1117         int i, j;
1118 
1119         for (i = 0; init[cam->method][i].size != -1; i++) {
1120                 res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
1121                                      0, init[cam->method][i].bytes,
1122                                      init[cam->method][i].size);
1123                 if (res < 0) {
1124                         dev_err(&cam->udev->dev,
1125                                 "error during open sequence: %d\n", i);
1126                         return res;
1127                 }
1128         }
1129 
1130         cam->skip = 2;
1131         cam->last_frame = -1;
1132         cam->cur_frame = 0;
1133         cam->frame_count = 0;
1134         for (j = 0; j < FRAMES; j++) {
1135                 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1136                 cam->buffer.frame[j].cur_size = 0;
1137         }
1138         v4l2_ctrl_handler_setup(&cam->ctrl_handler);
1139         return 0;
1140 }
1141 
1142 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1143                                    enum v4l2_buf_type type)
1144 {
1145         struct zr364xx_camera *cam = video_drvdata(file);
1146         int res;
1147 
1148         DBG("%s\n", __func__);
1149 
1150         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1151                 return -EINVAL;
1152 
1153         if (cam->owner && cam->owner != priv)
1154                 return -EBUSY;
1155 
1156         res = zr364xx_prepare(cam);
1157         if (res)
1158                 return res;
1159         res = videobuf_streamon(&cam->vb_vidq);
1160         if (res == 0) {
1161                 zr364xx_start_acquire(cam);
1162                 cam->owner = file->private_data;
1163         }
1164         return res;
1165 }
1166 
1167 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1168                                     enum v4l2_buf_type type)
1169 {
1170         struct zr364xx_camera *cam = video_drvdata(file);
1171 
1172         DBG("%s\n", __func__);
1173         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1174                 return -EINVAL;
1175         if (cam->owner && cam->owner != priv)
1176                 return -EBUSY;
1177         zr364xx_stop_acquire(cam);
1178         return videobuf_streamoff(&cam->vb_vidq);
1179 }
1180 
1181 
1182 /* open the camera */
1183 static int zr364xx_open(struct file *file)
1184 {
1185         struct zr364xx_camera *cam = video_drvdata(file);
1186         int err;
1187 
1188         DBG("%s\n", __func__);
1189 
1190         if (mutex_lock_interruptible(&cam->lock))
1191                 return -ERESTARTSYS;
1192 
1193         err = v4l2_fh_open(file);
1194         if (err)
1195                 goto out;
1196 
1197         /* Added some delay here, since opening/closing the camera quickly,
1198          * like Ekiga does during its startup, can crash the webcam
1199          */
1200         mdelay(100);
1201         err = 0;
1202 
1203 out:
1204         mutex_unlock(&cam->lock);
1205         DBG("%s: %d\n", __func__, err);
1206         return err;
1207 }
1208 
1209 static void zr364xx_release(struct v4l2_device *v4l2_dev)
1210 {
1211         struct zr364xx_camera *cam =
1212                 container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
1213         unsigned long i;
1214 
1215         v4l2_device_unregister(&cam->v4l2_dev);
1216 
1217         videobuf_mmap_free(&cam->vb_vidq);
1218 
1219         /* release sys buffers */
1220         for (i = 0; i < FRAMES; i++) {
1221                 if (cam->buffer.frame[i].lpvbits) {
1222                         DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1223                         vfree(cam->buffer.frame[i].lpvbits);
1224                 }
1225                 cam->buffer.frame[i].lpvbits = NULL;
1226         }
1227 
1228         v4l2_ctrl_handler_free(&cam->ctrl_handler);
1229         /* release transfer buffer */
1230         kfree(cam->pipe->transfer_buffer);
1231         kfree(cam);
1232 }
1233 
1234 /* release the camera */
1235 static int zr364xx_close(struct file *file)
1236 {
1237         struct zr364xx_camera *cam;
1238         struct usb_device *udev;
1239         int i;
1240 
1241         DBG("%s\n", __func__);
1242         cam = video_drvdata(file);
1243 
1244         mutex_lock(&cam->lock);
1245         udev = cam->udev;
1246 
1247         if (file->private_data == cam->owner) {
1248                 /* turn off stream */
1249                 if (cam->b_acquire)
1250                         zr364xx_stop_acquire(cam);
1251                 videobuf_streamoff(&cam->vb_vidq);
1252 
1253                 for (i = 0; i < 2; i++) {
1254                         send_control_msg(udev, 1, init[cam->method][i].value,
1255                                         0, init[cam->method][i].bytes,
1256                                         init[cam->method][i].size);
1257                 }
1258                 cam->owner = NULL;
1259         }
1260 
1261         /* Added some delay here, since opening/closing the camera quickly,
1262          * like Ekiga does during its startup, can crash the webcam
1263          */
1264         mdelay(100);
1265         mutex_unlock(&cam->lock);
1266         return v4l2_fh_release(file);
1267 }
1268 
1269 
1270 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1271 {
1272         struct zr364xx_camera *cam = video_drvdata(file);
1273         int ret;
1274 
1275         if (cam == NULL) {
1276                 DBG("%s: cam == NULL\n", __func__);
1277                 return -ENODEV;
1278         }
1279         DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1280 
1281         ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1282 
1283         DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1284                 (unsigned long)vma->vm_start,
1285                 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1286         return ret;
1287 }
1288 
1289 static unsigned int zr364xx_poll(struct file *file,
1290                                struct poll_table_struct *wait)
1291 {
1292         struct zr364xx_camera *cam = video_drvdata(file);
1293         struct videobuf_queue *q = &cam->vb_vidq;
1294         unsigned res = v4l2_ctrl_poll(file, wait);
1295 
1296         _DBG("%s\n", __func__);
1297 
1298         return res | videobuf_poll_stream(file, q, wait);
1299 }
1300 
1301 static const struct v4l2_ctrl_ops zr364xx_ctrl_ops = {
1302         .s_ctrl = zr364xx_s_ctrl,
1303 };
1304 
1305 static const struct v4l2_file_operations zr364xx_fops = {
1306         .owner = THIS_MODULE,
1307         .open = zr364xx_open,
1308         .release = zr364xx_close,
1309         .read = zr364xx_read,
1310         .mmap = zr364xx_mmap,
1311         .unlocked_ioctl = video_ioctl2,
1312         .poll = zr364xx_poll,
1313 };
1314 
1315 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1316         .vidioc_querycap        = zr364xx_vidioc_querycap,
1317         .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1318         .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1319         .vidioc_s_fmt_vid_cap   = zr364xx_vidioc_s_fmt_vid_cap,
1320         .vidioc_g_fmt_vid_cap   = zr364xx_vidioc_g_fmt_vid_cap,
1321         .vidioc_enum_input      = zr364xx_vidioc_enum_input,
1322         .vidioc_g_input         = zr364xx_vidioc_g_input,
1323         .vidioc_s_input         = zr364xx_vidioc_s_input,
1324         .vidioc_streamon        = zr364xx_vidioc_streamon,
1325         .vidioc_streamoff       = zr364xx_vidioc_streamoff,
1326         .vidioc_reqbufs         = zr364xx_vidioc_reqbufs,
1327         .vidioc_querybuf        = zr364xx_vidioc_querybuf,
1328         .vidioc_qbuf            = zr364xx_vidioc_qbuf,
1329         .vidioc_dqbuf           = zr364xx_vidioc_dqbuf,
1330         .vidioc_log_status      = v4l2_ctrl_log_status,
1331         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1332         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1333 };
1334 
1335 static struct video_device zr364xx_template = {
1336         .name = DRIVER_DESC,
1337         .fops = &zr364xx_fops,
1338         .ioctl_ops = &zr364xx_ioctl_ops,
1339         .release = video_device_release_empty,
1340 };
1341 
1342 
1343 
1344 /*******************/
1345 /* USB integration */
1346 /*******************/
1347 static int zr364xx_board_init(struct zr364xx_camera *cam)
1348 {
1349         struct zr364xx_pipeinfo *pipe = cam->pipe;
1350         unsigned long i;
1351 
1352         DBG("board init: %p\n", cam);
1353         memset(pipe, 0, sizeof(*pipe));
1354         pipe->cam = cam;
1355         pipe->transfer_size = BUFFER_SIZE;
1356 
1357         pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1358                                         GFP_KERNEL);
1359         if (pipe->transfer_buffer == NULL) {
1360                 DBG("out of memory!\n");
1361                 return -ENOMEM;
1362         }
1363 
1364         cam->b_acquire = 0;
1365         cam->frame_count = 0;
1366 
1367         /*** start create system buffers ***/
1368         for (i = 0; i < FRAMES; i++) {
1369                 /* always allocate maximum size for system buffers */
1370                 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1371 
1372                 DBG("valloc %p, idx %lu, pdata %p\n",
1373                         &cam->buffer.frame[i], i,
1374                         cam->buffer.frame[i].lpvbits);
1375                 if (cam->buffer.frame[i].lpvbits == NULL) {
1376                         printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1377                                "Using less frames\n");
1378                         break;
1379                 }
1380         }
1381 
1382         if (i == 0) {
1383                 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1384                 kfree(cam->pipe->transfer_buffer);
1385                 cam->pipe->transfer_buffer = NULL;
1386                 return -ENOMEM;
1387         } else
1388                 cam->buffer.dwFrames = i;
1389 
1390         /* make sure internal states are set */
1391         for (i = 0; i < FRAMES; i++) {
1392                 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1393                 cam->buffer.frame[i].cur_size = 0;
1394         }
1395 
1396         cam->cur_frame = 0;
1397         cam->last_frame = -1;
1398         /*** end create system buffers ***/
1399 
1400         /* start read pipe */
1401         zr364xx_start_readpipe(cam);
1402         DBG(": board initialized\n");
1403         return 0;
1404 }
1405 
1406 static int zr364xx_probe(struct usb_interface *intf,
1407                          const struct usb_device_id *id)
1408 {
1409         struct usb_device *udev = interface_to_usbdev(intf);
1410         struct zr364xx_camera *cam = NULL;
1411         struct usb_host_interface *iface_desc;
1412         struct usb_endpoint_descriptor *endpoint;
1413         struct v4l2_ctrl_handler *hdl;
1414         int err;
1415         int i;
1416 
1417         DBG("probing...\n");
1418 
1419         dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1420         dev_info(&intf->dev, "model %04x:%04x detected\n",
1421                  le16_to_cpu(udev->descriptor.idVendor),
1422                  le16_to_cpu(udev->descriptor.idProduct));
1423 
1424         cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1425         if (cam == NULL) {
1426                 dev_err(&udev->dev, "cam: out of memory !\n");
1427                 return -ENOMEM;
1428         }
1429 
1430         cam->v4l2_dev.release = zr364xx_release;
1431         err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
1432         if (err < 0) {
1433                 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1434                 kfree(cam);
1435                 return err;
1436         }
1437         hdl = &cam->ctrl_handler;
1438         v4l2_ctrl_handler_init(hdl, 1);
1439         v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
1440                           V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
1441         if (hdl->error) {
1442                 err = hdl->error;
1443                 dev_err(&udev->dev, "couldn't register control\n");
1444                 goto fail;
1445         }
1446         /* save the init method used by this camera */
1447         cam->method = id->driver_info;
1448         mutex_init(&cam->lock);
1449         cam->vdev = zr364xx_template;
1450         cam->vdev.lock = &cam->lock;
1451         cam->vdev.v4l2_dev = &cam->v4l2_dev;
1452         cam->vdev.ctrl_handler = &cam->ctrl_handler;
1453         video_set_drvdata(&cam->vdev, cam);
1454 
1455         cam->udev = udev;
1456 
1457         switch (mode) {
1458         case 1:
1459                 dev_info(&udev->dev, "160x120 mode selected\n");
1460                 cam->width = 160;
1461                 cam->height = 120;
1462                 break;
1463         case 2:
1464                 dev_info(&udev->dev, "640x480 mode selected\n");
1465                 cam->width = 640;
1466                 cam->height = 480;
1467                 break;
1468         default:
1469                 dev_info(&udev->dev, "320x240 mode selected\n");
1470                 cam->width = 320;
1471                 cam->height = 240;
1472                 break;
1473         }
1474 
1475         m0d1[0] = mode;
1476         m1[2].value = 0xf000 + mode;
1477         m2[1].value = 0xf000 + mode;
1478 
1479         /* special case for METHOD3, the modes are different */
1480         if (cam->method == METHOD3) {
1481                 switch (mode) {
1482                 case 1:
1483                         m2[1].value = 0xf000 + 4;
1484                         break;
1485                 case 2:
1486                         m2[1].value = 0xf000 + 0;
1487                         break;
1488                 default:
1489                         m2[1].value = 0xf000 + 1;
1490                         break;
1491                 }
1492         }
1493 
1494         header2[437] = cam->height / 256;
1495         header2[438] = cam->height % 256;
1496         header2[439] = cam->width / 256;
1497         header2[440] = cam->width % 256;
1498 
1499         cam->nb = 0;
1500 
1501         DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1502 
1503         /* set up the endpoint information  */
1504         iface_desc = intf->cur_altsetting;
1505         DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1506         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1507                 endpoint = &iface_desc->endpoint[i].desc;
1508                 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1509                         /* we found the bulk in endpoint */
1510                         cam->read_endpoint = endpoint->bEndpointAddress;
1511                 }
1512         }
1513 
1514         if (!cam->read_endpoint) {
1515                 err = -ENOMEM;
1516                 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1517                 goto fail;
1518         }
1519 
1520         /* v4l */
1521         INIT_LIST_HEAD(&cam->vidq.active);
1522         cam->vidq.cam = cam;
1523 
1524         usb_set_intfdata(intf, cam);
1525 
1526         /* load zr364xx board specific */
1527         err = zr364xx_board_init(cam);
1528         if (!err)
1529                 err = v4l2_ctrl_handler_setup(hdl);
1530         if (err)
1531                 goto fail;
1532 
1533         spin_lock_init(&cam->slock);
1534 
1535         cam->fmt = formats;
1536 
1537         videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1538                                     NULL, &cam->slock,
1539                                     V4L2_BUF_TYPE_VIDEO_CAPTURE,
1540                                     V4L2_FIELD_NONE,
1541                                     sizeof(struct zr364xx_buffer), cam, &cam->lock);
1542 
1543         err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1544         if (err) {
1545                 dev_err(&udev->dev, "video_register_device failed\n");
1546                 goto fail;
1547         }
1548 
1549         dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1550                  video_device_node_name(&cam->vdev));
1551         return 0;
1552 
1553 fail:
1554         v4l2_ctrl_handler_free(hdl);
1555         v4l2_device_unregister(&cam->v4l2_dev);
1556         kfree(cam);
1557         return err;
1558 }
1559 
1560 
1561 static void zr364xx_disconnect(struct usb_interface *intf)
1562 {
1563         struct zr364xx_camera *cam = usb_get_intfdata(intf);
1564 
1565         mutex_lock(&cam->lock);
1566         usb_set_intfdata(intf, NULL);
1567         dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1568         video_unregister_device(&cam->vdev);
1569         v4l2_device_disconnect(&cam->v4l2_dev);
1570 
1571         /* stops the read pipe if it is running */
1572         if (cam->b_acquire)
1573                 zr364xx_stop_acquire(cam);
1574 
1575         zr364xx_stop_readpipe(cam);
1576         mutex_unlock(&cam->lock);
1577         v4l2_device_put(&cam->v4l2_dev);
1578 }
1579 
1580 
1581 #ifdef CONFIG_PM
1582 static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
1583 {
1584         struct zr364xx_camera *cam = usb_get_intfdata(intf);
1585 
1586         cam->was_streaming = cam->b_acquire;
1587         if (!cam->was_streaming)
1588                 return 0;
1589         zr364xx_stop_acquire(cam);
1590         zr364xx_stop_readpipe(cam);
1591         return 0;
1592 }
1593 
1594 static int zr364xx_resume(struct usb_interface *intf)
1595 {
1596         struct zr364xx_camera *cam = usb_get_intfdata(intf);
1597         int res;
1598 
1599         if (!cam->was_streaming)
1600                 return 0;
1601 
1602         zr364xx_start_readpipe(cam);
1603         res = zr364xx_prepare(cam);
1604         if (!res)
1605                 zr364xx_start_acquire(cam);
1606         return res;
1607 }
1608 #endif
1609 
1610 /**********************/
1611 /* Module integration */
1612 /**********************/
1613 
1614 static struct usb_driver zr364xx_driver = {
1615         .name = "zr364xx",
1616         .probe = zr364xx_probe,
1617         .disconnect = zr364xx_disconnect,
1618 #ifdef CONFIG_PM
1619         .suspend = zr364xx_suspend,
1620         .resume = zr364xx_resume,
1621         .reset_resume = zr364xx_resume,
1622 #endif
1623         .id_table = device_table
1624 };
1625 
1626 module_usb_driver(zr364xx_driver);
1627 
1628 MODULE_AUTHOR(DRIVER_AUTHOR);
1629 MODULE_DESCRIPTION(DRIVER_DESC);
1630 MODULE_LICENSE("GPL");
1631 MODULE_VERSION(DRIVER_VERSION);
1632 

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