projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[media] adv7180.c: convert to v4l2 control framework
[deliverable/linux.git] / drivers / media / video / 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 if (in_interrupt())
381 BUG();
382
383 videobuf_vmalloc_free(&buf->vb);
384 buf->vb.state = VIDEOBUF_NEEDS_INIT;
385 }
386
387 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
388 enum v4l2_field field)
389 {
390 struct zr364xx_camera *cam = vq->priv_data;
391 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
392 vb);
393 int rc;
394
395 DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
396 cam->fmt->name : "");
397 if (cam->fmt == NULL)
398 return -EINVAL;
399
400 buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
401
402 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
403 DBG("invalid buffer prepare\n");
404 return -EINVAL;
405 }
406
407 buf->fmt = cam->fmt;
408 buf->vb.width = cam->width;
409 buf->vb.height = cam->height;
410 buf->vb.field = field;
411
412 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
413 rc = videobuf_iolock(vq, &buf->vb, NULL);
414 if (rc < 0)
415 goto fail;
416 }
417
418 buf->vb.state = VIDEOBUF_PREPARED;
419 return 0;
420 fail:
421 free_buffer(vq, buf);
422 return rc;
423 }
424
425 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
426 {
427 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
428 vb);
429 struct zr364xx_camera *cam = vq->priv_data;
430
431 _DBG("%s\n", __func__);
432
433 buf->vb.state = VIDEOBUF_QUEUED;
434 list_add_tail(&buf->vb.queue, &cam->vidq.active);
435 }
436
437 static void buffer_release(struct videobuf_queue *vq,
438 struct videobuf_buffer *vb)
439 {
440 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
441 vb);
442
443 _DBG("%s\n", __func__);
444 free_buffer(vq, buf);
445 }
446
447 static struct videobuf_queue_ops zr364xx_video_qops = {
448 .buf_setup = buffer_setup,
449 .buf_prepare = buffer_prepare,
450 .buf_queue = buffer_queue,
451 .buf_release = buffer_release,
452 };
453
454 /********************/
455 /* V4L2 integration */
456 /********************/
457 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
458 enum v4l2_buf_type type);
459
460 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
461 loff_t * ppos)
462 {
463 struct zr364xx_camera *cam = video_drvdata(file);
464 int err = 0;
465
466 _DBG("%s\n", __func__);
467
468 if (!buf)
469 return -EINVAL;
470
471 if (!count)
472 return -EINVAL;
473
474 if (mutex_lock_interruptible(&cam->lock))
475 return -ERESTARTSYS;
476
477 err = zr364xx_vidioc_streamon(file, file->private_data,
478 V4L2_BUF_TYPE_VIDEO_CAPTURE);
479 if (err == 0) {
480 DBG("%s: reading %d bytes at pos %d.\n", __func__,
481 (int) count, (int) *ppos);
482
483 /* NoMan Sux ! */
484 err = videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
485 file->f_flags & O_NONBLOCK);
486 }
487 mutex_unlock(&cam->lock);
488 return err;
489 }
490
491 /* video buffer vmalloc implementation based partly on VIVI driver which is
492 * Copyright (c) 2006 by
493 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
494 * Ted Walther <ted--a.t--enumera.com>
495 * John Sokol <sokol--a.t--videotechnology.com>
496 * http://v4l.videotechnology.com/
497 *
498 */
499 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
500 struct zr364xx_buffer *buf,
501 int jpgsize)
502 {
503 int pos = 0;
504 struct timeval ts;
505 const char *tmpbuf;
506 char *vbuf = videobuf_to_vmalloc(&buf->vb);
507 unsigned long last_frame;
508
509 if (!vbuf)
510 return;
511
512 last_frame = cam->last_frame;
513 if (last_frame != -1) {
514 tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
515 switch (buf->fmt->fourcc) {
516 case V4L2_PIX_FMT_JPEG:
517 buf->vb.size = jpgsize;
518 memcpy(vbuf, tmpbuf, buf->vb.size);
519 break;
520 default:
521 printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
522 }
523 cam->last_frame = -1;
524 } else {
525 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
526 return;
527 }
528 DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
529 (unsigned long)vbuf, pos);
530 /* tell v4l buffer was filled */
531
532 buf->vb.field_count = cam->frame_count * 2;
533 do_gettimeofday(&ts);
534 buf->vb.ts = ts;
535 buf->vb.state = VIDEOBUF_DONE;
536 }
537
538 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
539 {
540 struct zr364xx_dmaqueue *dma_q = &cam->vidq;
541 struct zr364xx_buffer *buf;
542 unsigned long flags = 0;
543 int rc = 0;
544
545 DBG("wakeup: %p\n", &dma_q);
546 spin_lock_irqsave(&cam->slock, flags);
547
548 if (list_empty(&dma_q->active)) {
549 DBG("No active queue to serve\n");
550 rc = -1;
551 goto unlock;
552 }
553 buf = list_entry(dma_q->active.next,
554 struct zr364xx_buffer, vb.queue);
555
556 if (!waitqueue_active(&buf->vb.done)) {
557 /* no one active */
558 rc = -1;
559 goto unlock;
560 }
561 list_del(&buf->vb.queue);
562 do_gettimeofday(&buf->vb.ts);
563 DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
564 zr364xx_fillbuff(cam, buf, jpgsize);
565 wake_up(&buf->vb.done);
566 DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
567 unlock:
568 spin_unlock_irqrestore(&cam->slock, flags);
569 return rc;
570 }
571
572 /* this function moves the usb stream read pipe data
573 * into the system buffers.
574 * returns 0 on success, EAGAIN if more data to process (call this
575 * function again).
576 */
577 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
578 struct zr364xx_pipeinfo *pipe_info,
579 struct urb *purb)
580 {
581 unsigned char *pdest;
582 unsigned char *psrc;
583 s32 idx = -1;
584 struct zr364xx_framei *frm;
585 int i = 0;
586 unsigned char *ptr = NULL;
587
588 _DBG("buffer to user\n");
589 idx = cam->cur_frame;
590 frm = &cam->buffer.frame[idx];
591
592 /* swap bytes if camera needs it */
593 if (cam->method == METHOD0) {
594 u16 *buf = (u16 *)pipe_info->transfer_buffer;
595 for (i = 0; i < purb->actual_length/2; i++)
596 swab16s(buf + i);
597 }
598
599 /* search done. now find out if should be acquiring */
600 if (!cam->b_acquire) {
601 /* we found a frame, but this channel is turned off */
602 frm->ulState = ZR364XX_READ_IDLE;
603 return -EINVAL;
604 }
605
606 psrc = (u8 *)pipe_info->transfer_buffer;
607 ptr = pdest = frm->lpvbits;
608
609 if (frm->ulState == ZR364XX_READ_IDLE) {
610 frm->ulState = ZR364XX_READ_FRAME;
611 frm->cur_size = 0;
612
613 _DBG("jpeg header, ");
614 memcpy(ptr, header1, sizeof(header1));
615 ptr += sizeof(header1);
616 header3 = 0;
617 memcpy(ptr, &header3, 1);
618 ptr++;
619 memcpy(ptr, psrc, 64);
620 ptr += 64;
621 header3 = 1;
622 memcpy(ptr, &header3, 1);
623 ptr++;
624 memcpy(ptr, psrc + 64, 64);
625 ptr += 64;
626 memcpy(ptr, header2, sizeof(header2));
627 ptr += sizeof(header2);
628 memcpy(ptr, psrc + 128,
629 purb->actual_length - 128);
630 ptr += purb->actual_length - 128;
631 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
632 psrc[0], psrc[1], psrc[2],
633 psrc[3], psrc[4], psrc[5],
634 psrc[6], psrc[7], psrc[8]);
635 frm->cur_size = ptr - pdest;
636 } else {
637 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
638 dev_info(&cam->udev->dev,
639 "%s: buffer (%d bytes) too small to hold "
640 "frame data. Discarding frame data.\n",
641 __func__, MAX_FRAME_SIZE);
642 } else {
643 pdest += frm->cur_size;
644 memcpy(pdest, psrc, purb->actual_length);
645 frm->cur_size += purb->actual_length;
646 }
647 }
648 /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
649 purb->actual_length);*/
650
651 if (purb->actual_length < pipe_info->transfer_size) {
652 _DBG("****************Buffer[%d]full*************\n", idx);
653 cam->last_frame = cam->cur_frame;
654 cam->cur_frame++;
655 /* end of system frame ring buffer, start at zero */
656 if (cam->cur_frame == cam->buffer.dwFrames)
657 cam->cur_frame = 0;
658
659 /* frame ready */
660 /* go back to find the JPEG EOI marker */
661 ptr = pdest = frm->lpvbits;
662 ptr += frm->cur_size - 2;
663 while (ptr > pdest) {
664 if (*ptr == 0xFF && *(ptr + 1) == 0xD9
665 && *(ptr + 2) == 0xFF)
666 break;
667 ptr--;
668 }
669 if (ptr == pdest)
670 DBG("No EOI marker\n");
671
672 /* Sometimes there is junk data in the middle of the picture,
673 * we want to skip this bogus frames */
674 while (ptr > pdest) {
675 if (*ptr == 0xFF && *(ptr + 1) == 0xFF
676 && *(ptr + 2) == 0xFF)
677 break;
678 ptr--;
679 }
680 if (ptr != pdest) {
681 DBG("Bogus frame ? %d\n", ++(cam->nb));
682 } else if (cam->b_acquire) {
683 /* we skip the 2 first frames which are usually buggy */
684 if (cam->skip)
685 cam->skip--;
686 else {
687 _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
688 frm->cur_size,
689 pdest[0], pdest[1], pdest[2], pdest[3],
690 pdest[4], pdest[5], pdest[6], pdest[7]);
691
692 zr364xx_got_frame(cam, frm->cur_size);
693 }
694 }
695 cam->frame_count++;
696 frm->ulState = ZR364XX_READ_IDLE;
697 frm->cur_size = 0;
698 }
699 /* done successfully */
700 return 0;
701 }
702
703 static int zr364xx_vidioc_querycap(struct file *file, void *priv,
704 struct v4l2_capability *cap)
705 {
706 struct zr364xx_camera *cam = video_drvdata(file);
707
708 strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
709 strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
710 strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
711 sizeof(cap->bus_info));
712 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
713 V4L2_CAP_READWRITE |
714 V4L2_CAP_STREAMING;
715 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
716
717 return 0;
718 }
719
720 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
721 struct v4l2_input *i)
722 {
723 if (i->index != 0)
724 return -EINVAL;
725 strcpy(i->name, DRIVER_DESC " Camera");
726 i->type = V4L2_INPUT_TYPE_CAMERA;
727 return 0;
728 }
729
730 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
731 unsigned int *i)
732 {
733 *i = 0;
734 return 0;
735 }
736
737 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
738 unsigned int i)
739 {
740 if (i != 0)
741 return -EINVAL;
742 return 0;
743 }
744
745 static int zr364xx_s_ctrl(struct v4l2_ctrl *ctrl)
746 {
747 struct zr364xx_camera *cam =
748 container_of(ctrl->handler, struct zr364xx_camera, ctrl_handler);
749 int temp;
750
751 switch (ctrl->id) {
752 case V4L2_CID_BRIGHTNESS:
753 /* hardware brightness */
754 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
755 temp = (0x60 << 8) + 127 - ctrl->val;
756 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
757 break;
758 default:
759 return -EINVAL;
760 }
761
762 return 0;
763 }
764
765 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
766 void *priv, struct v4l2_fmtdesc *f)
767 {
768 if (f->index > 0)
769 return -EINVAL;
770 f->flags = V4L2_FMT_FLAG_COMPRESSED;
771 strcpy(f->description, formats[0].name);
772 f->pixelformat = formats[0].fourcc;
773 return 0;
774 }
775
776 static char *decode_fourcc(__u32 pixelformat, char *buf)
777 {
778 buf[0] = pixelformat & 0xff;
779 buf[1] = (pixelformat >> 8) & 0xff;
780 buf[2] = (pixelformat >> 16) & 0xff;
781 buf[3] = (pixelformat >> 24) & 0xff;
782 buf[4] = '\0';
783 return buf;
784 }
785
786 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
787 struct v4l2_format *f)
788 {
789 struct zr364xx_camera *cam = video_drvdata(file);
790 char pixelformat_name[5];
791
792 if (cam == NULL)
793 return -ENODEV;
794
795 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
796 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
797 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
798 return -EINVAL;
799 }
800
801 if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
802 !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
803 f->fmt.pix.width = 320;
804 f->fmt.pix.height = 240;
805 }
806
807 f->fmt.pix.field = V4L2_FIELD_NONE;
808 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
809 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
810 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
811 f->fmt.pix.priv = 0;
812 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
813 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
814 f->fmt.pix.field);
815 return 0;
816 }
817
818 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
819 struct v4l2_format *f)
820 {
821 struct zr364xx_camera *cam;
822
823 if (file == NULL)
824 return -ENODEV;
825 cam = video_drvdata(file);
826
827 f->fmt.pix.pixelformat = formats[0].fourcc;
828 f->fmt.pix.field = V4L2_FIELD_NONE;
829 f->fmt.pix.width = cam->width;
830 f->fmt.pix.height = cam->height;
831 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
832 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
833 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
834 f->fmt.pix.priv = 0;
835 return 0;
836 }
837
838 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
839 struct v4l2_format *f)
840 {
841 struct zr364xx_camera *cam = video_drvdata(file);
842 struct videobuf_queue *q = &cam->vb_vidq;
843 char pixelformat_name[5];
844 int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
845 int i;
846
847 if (ret < 0)
848 return ret;
849
850 mutex_lock(&q->vb_lock);
851
852 if (videobuf_queue_is_busy(&cam->vb_vidq)) {
853 DBG("%s queue busy\n", __func__);
854 ret = -EBUSY;
855 goto out;
856 }
857
858 if (cam->owner) {
859 DBG("%s can't change format after started\n", __func__);
860 ret = -EBUSY;
861 goto out;
862 }
863
864 cam->width = f->fmt.pix.width;
865 cam->height = f->fmt.pix.height;
866 DBG("%s: %dx%d mode selected\n", __func__,
867 cam->width, cam->height);
868 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
869 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
870 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
871 f->fmt.pix.priv = 0;
872 cam->vb_vidq.field = f->fmt.pix.field;
873
874 if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
875 mode = 1;
876 else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
877 mode = 2;
878 else
879 mode = 0;
880
881 m0d1[0] = mode;
882 m1[2].value = 0xf000 + mode;
883 m2[1].value = 0xf000 + mode;
884
885 /* special case for METHOD3, the modes are different */
886 if (cam->method == METHOD3) {
887 switch (mode) {
888 case 1:
889 m2[1].value = 0xf000 + 4;
890 break;
891 case 2:
892 m2[1].value = 0xf000 + 0;
893 break;
894 default:
895 m2[1].value = 0xf000 + 1;
896 break;
897 }
898 }
899
900 header2[437] = cam->height / 256;
901 header2[438] = cam->height % 256;
902 header2[439] = cam->width / 256;
903 header2[440] = cam->width % 256;
904
905 for (i = 0; init[cam->method][i].size != -1; i++) {
906 ret =
907 send_control_msg(cam->udev, 1, init[cam->method][i].value,
908 0, init[cam->method][i].bytes,
909 init[cam->method][i].size);
910 if (ret < 0) {
911 dev_err(&cam->udev->dev,
912 "error during resolution change sequence: %d\n", i);
913 goto out;
914 }
915 }
916
917 /* Added some delay here, since opening/closing the camera quickly,
918 * like Ekiga does during its startup, can crash the webcam
919 */
920 mdelay(100);
921 cam->skip = 2;
922 ret = 0;
923
924 out:
925 mutex_unlock(&q->vb_lock);
926
927 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
928 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
929 f->fmt.pix.field);
930 return ret;
931 }
932
933 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
934 struct v4l2_requestbuffers *p)
935 {
936 struct zr364xx_camera *cam = video_drvdata(file);
937
938 if (cam->owner && cam->owner != priv)
939 return -EBUSY;
940 return videobuf_reqbufs(&cam->vb_vidq, p);
941 }
942
943 static int zr364xx_vidioc_querybuf(struct file *file,
944 void *priv,
945 struct v4l2_buffer *p)
946 {
947 int rc;
948 struct zr364xx_camera *cam = video_drvdata(file);
949 rc = videobuf_querybuf(&cam->vb_vidq, p);
950 return rc;
951 }
952
953 static int zr364xx_vidioc_qbuf(struct file *file,
954 void *priv,
955 struct v4l2_buffer *p)
956 {
957 int rc;
958 struct zr364xx_camera *cam = video_drvdata(file);
959 _DBG("%s\n", __func__);
960 if (cam->owner && cam->owner != priv)
961 return -EBUSY;
962 rc = videobuf_qbuf(&cam->vb_vidq, p);
963 return rc;
964 }
965
966 static int zr364xx_vidioc_dqbuf(struct file *file,
967 void *priv,
968 struct v4l2_buffer *p)
969 {
970 int rc;
971 struct zr364xx_camera *cam = video_drvdata(file);
972 _DBG("%s\n", __func__);
973 if (cam->owner && cam->owner != priv)
974 return -EBUSY;
975 rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
976 return rc;
977 }
978
979 static void read_pipe_completion(struct urb *purb)
980 {
981 struct zr364xx_pipeinfo *pipe_info;
982 struct zr364xx_camera *cam;
983 int pipe;
984
985 pipe_info = purb->context;
986 _DBG("%s %p, status %d\n", __func__, purb, purb->status);
987 if (pipe_info == NULL) {
988 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
989 return;
990 }
991
992 cam = pipe_info->cam;
993 if (cam == NULL) {
994 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
995 return;
996 }
997
998 /* if shutting down, do not resubmit, exit immediately */
999 if (purb->status == -ESHUTDOWN) {
1000 DBG("%s, err shutdown\n", __func__);
1001 pipe_info->err_count++;
1002 return;
1003 }
1004
1005 if (pipe_info->state == 0) {
1006 DBG("exiting USB pipe\n");
1007 return;
1008 }
1009
1010 if (purb->actual_length < 0 ||
1011 purb->actual_length > pipe_info->transfer_size) {
1012 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1013 return;
1014 }
1015
1016 if (purb->status == 0)
1017 zr364xx_read_video_callback(cam, pipe_info, purb);
1018 else {
1019 pipe_info->err_count++;
1020 DBG("%s: failed URB %d\n", __func__, purb->status);
1021 }
1022
1023 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1024
1025 /* reuse urb */
1026 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1027 pipe,
1028 pipe_info->transfer_buffer,
1029 pipe_info->transfer_size,
1030 read_pipe_completion, pipe_info);
1031
1032 if (pipe_info->state != 0) {
1033 purb->status = usb_submit_urb(pipe_info->stream_urb,
1034 GFP_ATOMIC);
1035
1036 if (purb->status)
1037 dev_err(&cam->udev->dev,
1038 "error submitting urb (error=%i)\n",
1039 purb->status);
1040 } else
1041 DBG("read pipe complete state 0\n");
1042 }
1043
1044 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1045 {
1046 int pipe;
1047 int retval;
1048 struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1049 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1050 DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1051
1052 pipe_info->state = 1;
1053 pipe_info->err_count = 0;
1054 pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1055 if (!pipe_info->stream_urb) {
1056 dev_err(&cam->udev->dev, "ReadStream: Unable to alloc URB\n");
1057 return -ENOMEM;
1058 }
1059 /* transfer buffer allocated in board_init */
1060 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1061 pipe,
1062 pipe_info->transfer_buffer,
1063 pipe_info->transfer_size,
1064 read_pipe_completion, pipe_info);
1065
1066 DBG("submitting URB %p\n", pipe_info->stream_urb);
1067 retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1068 if (retval) {
1069 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1070 return retval;
1071 }
1072
1073 return 0;
1074 }
1075
1076 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1077 {
1078 struct zr364xx_pipeinfo *pipe_info;
1079
1080 if (cam == NULL) {
1081 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1082 return;
1083 }
1084 DBG("stop read pipe\n");
1085 pipe_info = cam->pipe;
1086 if (pipe_info) {
1087 if (pipe_info->state != 0)
1088 pipe_info->state = 0;
1089
1090 if (pipe_info->stream_urb) {
1091 /* cancel urb */
1092 usb_kill_urb(pipe_info->stream_urb);
1093 usb_free_urb(pipe_info->stream_urb);
1094 pipe_info->stream_urb = NULL;
1095 }
1096 }
1097 return;
1098 }
1099
1100 /* starts acquisition process */
1101 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1102 {
1103 int j;
1104
1105 DBG("start acquire\n");
1106
1107 cam->last_frame = -1;
1108 cam->cur_frame = 0;
1109 for (j = 0; j < FRAMES; j++) {
1110 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1111 cam->buffer.frame[j].cur_size = 0;
1112 }
1113 cam->b_acquire = 1;
1114 return 0;
1115 }
1116
1117 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1118 {
1119 cam->b_acquire = 0;
1120 return 0;
1121 }
1122
1123 static int zr364xx_prepare(struct zr364xx_camera *cam)
1124 {
1125 int res;
1126 int i, j;
1127
1128 for (i = 0; init[cam->method][i].size != -1; i++) {
1129 res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
1130 0, init[cam->method][i].bytes,
1131 init[cam->method][i].size);
1132 if (res < 0) {
1133 dev_err(&cam->udev->dev,
1134 "error during open sequence: %d\n", i);
1135 return res;
1136 }
1137 }
1138
1139 cam->skip = 2;
1140 cam->last_frame = -1;
1141 cam->cur_frame = 0;
1142 cam->frame_count = 0;
1143 for (j = 0; j < FRAMES; j++) {
1144 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1145 cam->buffer.frame[j].cur_size = 0;
1146 }
1147 v4l2_ctrl_handler_setup(&cam->ctrl_handler);
1148 return 0;
1149 }
1150
1151 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1152 enum v4l2_buf_type type)
1153 {
1154 struct zr364xx_camera *cam = video_drvdata(file);
1155 int res;
1156
1157 DBG("%s\n", __func__);
1158
1159 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1160 return -EINVAL;
1161
1162 if (cam->owner && cam->owner != priv)
1163 return -EBUSY;
1164
1165 res = zr364xx_prepare(cam);
1166 if (res)
1167 return res;
1168 res = videobuf_streamon(&cam->vb_vidq);
1169 if (res == 0) {
1170 zr364xx_start_acquire(cam);
1171 cam->owner = file->private_data;
1172 }
1173 return res;
1174 }
1175
1176 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1177 enum v4l2_buf_type type)
1178 {
1179 struct zr364xx_camera *cam = video_drvdata(file);
1180
1181 DBG("%s\n", __func__);
1182 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1183 return -EINVAL;
1184 if (cam->owner && cam->owner != priv)
1185 return -EBUSY;
1186 zr364xx_stop_acquire(cam);
1187 return videobuf_streamoff(&cam->vb_vidq);
1188 }
1189
1190
1191 /* open the camera */
1192 static int zr364xx_open(struct file *file)
1193 {
1194 struct zr364xx_camera *cam = video_drvdata(file);
1195 int err;
1196
1197 DBG("%s\n", __func__);
1198
1199 if (mutex_lock_interruptible(&cam->lock))
1200 return -ERESTARTSYS;
1201
1202 err = v4l2_fh_open(file);
1203 if (err)
1204 goto out;
1205
1206 /* Added some delay here, since opening/closing the camera quickly,
1207 * like Ekiga does during its startup, can crash the webcam
1208 */
1209 mdelay(100);
1210 err = 0;
1211
1212 out:
1213 mutex_unlock(&cam->lock);
1214 DBG("%s: %d\n", __func__, err);
1215 return err;
1216 }
1217
1218 static void zr364xx_release(struct v4l2_device *v4l2_dev)
1219 {
1220 struct zr364xx_camera *cam =
1221 container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
1222 unsigned long i;
1223
1224 v4l2_device_unregister(&cam->v4l2_dev);
1225
1226 videobuf_mmap_free(&cam->vb_vidq);
1227
1228 /* release sys buffers */
1229 for (i = 0; i < FRAMES; i++) {
1230 if (cam->buffer.frame[i].lpvbits) {
1231 DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1232 vfree(cam->buffer.frame[i].lpvbits);
1233 }
1234 cam->buffer.frame[i].lpvbits = NULL;
1235 }
1236
1237 v4l2_ctrl_handler_free(&cam->ctrl_handler);
1238 /* release transfer buffer */
1239 kfree(cam->pipe->transfer_buffer);
1240 kfree(cam);
1241 }
1242
1243 /* release the camera */
1244 static int zr364xx_close(struct file *file)
1245 {
1246 struct zr364xx_camera *cam;
1247 struct usb_device *udev;
1248 int i;
1249
1250 DBG("%s\n", __func__);
1251 cam = video_drvdata(file);
1252
1253 mutex_lock(&cam->lock);
1254 udev = cam->udev;
1255
1256 if (file->private_data == cam->owner) {
1257 /* turn off stream */
1258 if (cam->b_acquire)
1259 zr364xx_stop_acquire(cam);
1260 videobuf_streamoff(&cam->vb_vidq);
1261
1262 for (i = 0; i < 2; i++) {
1263 send_control_msg(udev, 1, init[cam->method][i].value,
1264 0, init[cam->method][i].bytes,
1265 init[cam->method][i].size);
1266 }
1267 cam->owner = NULL;
1268 }
1269
1270 /* Added some delay here, since opening/closing the camera quickly,
1271 * like Ekiga does during its startup, can crash the webcam
1272 */
1273 mdelay(100);
1274 mutex_unlock(&cam->lock);
1275 return v4l2_fh_release(file);
1276 }
1277
1278
1279 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1280 {
1281 struct zr364xx_camera *cam = video_drvdata(file);
1282 int ret;
1283
1284 if (cam == NULL) {
1285 DBG("%s: cam == NULL\n", __func__);
1286 return -ENODEV;
1287 }
1288 DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1289
1290 ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1291
1292 DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1293 (unsigned long)vma->vm_start,
1294 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1295 return ret;
1296 }
1297
1298 static unsigned int zr364xx_poll(struct file *file,
1299 struct poll_table_struct *wait)
1300 {
1301 struct zr364xx_camera *cam = video_drvdata(file);
1302 struct videobuf_queue *q = &cam->vb_vidq;
1303 unsigned res = v4l2_ctrl_poll(file, wait);
1304
1305 _DBG("%s\n", __func__);
1306
1307 return res | videobuf_poll_stream(file, q, wait);
1308 }
1309
1310 static const struct v4l2_ctrl_ops zr364xx_ctrl_ops = {
1311 .s_ctrl = zr364xx_s_ctrl,
1312 };
1313
1314 static const struct v4l2_file_operations zr364xx_fops = {
1315 .owner = THIS_MODULE,
1316 .open = zr364xx_open,
1317 .release = zr364xx_close,
1318 .read = zr364xx_read,
1319 .mmap = zr364xx_mmap,
1320 .unlocked_ioctl = video_ioctl2,
1321 .poll = zr364xx_poll,
1322 };
1323
1324 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1325 .vidioc_querycap = zr364xx_vidioc_querycap,
1326 .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1327 .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1328 .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
1329 .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
1330 .vidioc_enum_input = zr364xx_vidioc_enum_input,
1331 .vidioc_g_input = zr364xx_vidioc_g_input,
1332 .vidioc_s_input = zr364xx_vidioc_s_input,
1333 .vidioc_streamon = zr364xx_vidioc_streamon,
1334 .vidioc_streamoff = zr364xx_vidioc_streamoff,
1335 .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
1336 .vidioc_querybuf = zr364xx_vidioc_querybuf,
1337 .vidioc_qbuf = zr364xx_vidioc_qbuf,
1338 .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
1339 .vidioc_log_status = v4l2_ctrl_log_status,
1340 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1341 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1342 };
1343
1344 static struct video_device zr364xx_template = {
1345 .name = DRIVER_DESC,
1346 .fops = &zr364xx_fops,
1347 .ioctl_ops = &zr364xx_ioctl_ops,
1348 .release = video_device_release_empty,
1349 };
1350
1351
1352
1353 /*******************/
1354 /* USB integration */
1355 /*******************/
1356 static int zr364xx_board_init(struct zr364xx_camera *cam)
1357 {
1358 struct zr364xx_pipeinfo *pipe = cam->pipe;
1359 unsigned long i;
1360
1361 DBG("board init: %p\n", cam);
1362 memset(pipe, 0, sizeof(*pipe));
1363 pipe->cam = cam;
1364 pipe->transfer_size = BUFFER_SIZE;
1365
1366 pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1367 GFP_KERNEL);
1368 if (pipe->transfer_buffer == NULL) {
1369 DBG("out of memory!\n");
1370 return -ENOMEM;
1371 }
1372
1373 cam->b_acquire = 0;
1374 cam->frame_count = 0;
1375
1376 /*** start create system buffers ***/
1377 for (i = 0; i < FRAMES; i++) {
1378 /* always allocate maximum size for system buffers */
1379 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1380
1381 DBG("valloc %p, idx %lu, pdata %p\n",
1382 &cam->buffer.frame[i], i,
1383 cam->buffer.frame[i].lpvbits);
1384 if (cam->buffer.frame[i].lpvbits == NULL) {
1385 printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1386 "Using less frames\n");
1387 break;
1388 }
1389 }
1390
1391 if (i == 0) {
1392 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1393 kfree(cam->pipe->transfer_buffer);
1394 cam->pipe->transfer_buffer = NULL;
1395 return -ENOMEM;
1396 } else
1397 cam->buffer.dwFrames = i;
1398
1399 /* make sure internal states are set */
1400 for (i = 0; i < FRAMES; i++) {
1401 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1402 cam->buffer.frame[i].cur_size = 0;
1403 }
1404
1405 cam->cur_frame = 0;
1406 cam->last_frame = -1;
1407 /*** end create system buffers ***/
1408
1409 /* start read pipe */
1410 zr364xx_start_readpipe(cam);
1411 DBG(": board initialized\n");
1412 return 0;
1413 }
1414
1415 static int zr364xx_probe(struct usb_interface *intf,
1416 const struct usb_device_id *id)
1417 {
1418 struct usb_device *udev = interface_to_usbdev(intf);
1419 struct zr364xx_camera *cam = NULL;
1420 struct usb_host_interface *iface_desc;
1421 struct usb_endpoint_descriptor *endpoint;
1422 struct v4l2_ctrl_handler *hdl;
1423 int err;
1424 int i;
1425
1426 DBG("probing...\n");
1427
1428 dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1429 dev_info(&intf->dev, "model %04x:%04x detected\n",
1430 le16_to_cpu(udev->descriptor.idVendor),
1431 le16_to_cpu(udev->descriptor.idProduct));
1432
1433 cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1434 if (cam == NULL) {
1435 dev_err(&udev->dev, "cam: out of memory !\n");
1436 return -ENOMEM;
1437 }
1438
1439 cam->v4l2_dev.release = zr364xx_release;
1440 err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
1441 if (err < 0) {
1442 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1443 kfree(cam);
1444 return err;
1445 }
1446 hdl = &cam->ctrl_handler;
1447 v4l2_ctrl_handler_init(hdl, 1);
1448 v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
1449 V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
1450 if (hdl->error) {
1451 err = hdl->error;
1452 dev_err(&udev->dev, "couldn't register control\n");
1453 goto fail;
1454 }
1455 /* save the init method used by this camera */
1456 cam->method = id->driver_info;
1457 mutex_init(&cam->lock);
1458 cam->vdev = zr364xx_template;
1459 cam->vdev.lock = &cam->lock;
1460 cam->vdev.v4l2_dev = &cam->v4l2_dev;
1461 cam->vdev.ctrl_handler = &cam->ctrl_handler;
1462 set_bit(V4L2_FL_USE_FH_PRIO, &cam->vdev.flags);
1463 video_set_drvdata(&cam->vdev, cam);
1464 if (debug)
1465 cam->vdev.debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
1466
1467 cam->udev = udev;
1468
1469 switch (mode) {
1470 case 1:
1471 dev_info(&udev->dev, "160x120 mode selected\n");
1472 cam->width = 160;
1473 cam->height = 120;
1474 break;
1475 case 2:
1476 dev_info(&udev->dev, "640x480 mode selected\n");
1477 cam->width = 640;
1478 cam->height = 480;
1479 break;
1480 default:
1481 dev_info(&udev->dev, "320x240 mode selected\n");
1482 cam->width = 320;
1483 cam->height = 240;
1484 break;
1485 }
1486
1487 m0d1[0] = mode;
1488 m1[2].value = 0xf000 + mode;
1489 m2[1].value = 0xf000 + mode;
1490
1491 /* special case for METHOD3, the modes are different */
1492 if (cam->method == METHOD3) {
1493 switch (mode) {
1494 case 1:
1495 m2[1].value = 0xf000 + 4;
1496 break;
1497 case 2:
1498 m2[1].value = 0xf000 + 0;
1499 break;
1500 default:
1501 m2[1].value = 0xf000 + 1;
1502 break;
1503 }
1504 }
1505
1506 header2[437] = cam->height / 256;
1507 header2[438] = cam->height % 256;
1508 header2[439] = cam->width / 256;
1509 header2[440] = cam->width % 256;
1510
1511 cam->nb = 0;
1512
1513 DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1514
1515 /* set up the endpoint information */
1516 iface_desc = intf->cur_altsetting;
1517 DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1518 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1519 endpoint = &iface_desc->endpoint[i].desc;
1520 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1521 /* we found the bulk in endpoint */
1522 cam->read_endpoint = endpoint->bEndpointAddress;
1523 }
1524 }
1525
1526 if (!cam->read_endpoint) {
1527 err = -ENOMEM;
1528 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1529 goto fail;
1530 }
1531
1532 /* v4l */
1533 INIT_LIST_HEAD(&cam->vidq.active);
1534 cam->vidq.cam = cam;
1535
1536 usb_set_intfdata(intf, cam);
1537
1538 /* load zr364xx board specific */
1539 err = zr364xx_board_init(cam);
1540 if (!err)
1541 err = v4l2_ctrl_handler_setup(hdl);
1542 if (err)
1543 goto fail;
1544
1545 spin_lock_init(&cam->slock);
1546
1547 cam->fmt = formats;
1548
1549 videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1550 NULL, &cam->slock,
1551 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1552 V4L2_FIELD_NONE,
1553 sizeof(struct zr364xx_buffer), cam, &cam->lock);
1554
1555 err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1556 if (err) {
1557 dev_err(&udev->dev, "video_register_device failed\n");
1558 goto fail;
1559 }
1560
1561 dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1562 video_device_node_name(&cam->vdev));
1563 return 0;
1564
1565 fail:
1566 v4l2_ctrl_handler_free(hdl);
1567 v4l2_device_unregister(&cam->v4l2_dev);
1568 kfree(cam);
1569 return err;
1570 }
1571
1572
1573 static void zr364xx_disconnect(struct usb_interface *intf)
1574 {
1575 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1576
1577 mutex_lock(&cam->lock);
1578 usb_set_intfdata(intf, NULL);
1579 dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1580 video_unregister_device(&cam->vdev);
1581 v4l2_device_disconnect(&cam->v4l2_dev);
1582
1583 /* stops the read pipe if it is running */
1584 if (cam->b_acquire)
1585 zr364xx_stop_acquire(cam);
1586
1587 zr364xx_stop_readpipe(cam);
1588 mutex_unlock(&cam->lock);
1589 v4l2_device_put(&cam->v4l2_dev);
1590 }
1591
1592
1593 #ifdef CONFIG_PM
1594 static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
1595 {
1596 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1597
1598 cam->was_streaming = cam->b_acquire;
1599 if (!cam->was_streaming)
1600 return 0;
1601 zr364xx_stop_acquire(cam);
1602 zr364xx_stop_readpipe(cam);
1603 return 0;
1604 }
1605
1606 static int zr364xx_resume(struct usb_interface *intf)
1607 {
1608 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1609 int res;
1610
1611 if (!cam->was_streaming)
1612 return 0;
1613
1614 zr364xx_start_readpipe(cam);
1615 res = zr364xx_prepare(cam);
1616 if (!res)
1617 zr364xx_start_acquire(cam);
1618 return res;
1619 }
1620 #endif
1621
1622 /**********************/
1623 /* Module integration */
1624 /**********************/
1625
1626 static struct usb_driver zr364xx_driver = {
1627 .name = "zr364xx",
1628 .probe = zr364xx_probe,
1629 .disconnect = zr364xx_disconnect,
1630 #ifdef CONFIG_PM
1631 .suspend = zr364xx_suspend,
1632 .resume = zr364xx_resume,
1633 .reset_resume = zr364xx_resume,
1634 #endif
1635 .id_table = device_table
1636 };
1637
1638 module_usb_driver(zr364xx_driver);
1639
1640 MODULE_AUTHOR(DRIVER_AUTHOR);
1641 MODULE_DESCRIPTION(DRIVER_DESC);
1642 MODULE_LICENSE("GPL");
1643 MODULE_VERSION(DRIVER_VERSION);
Linux kernel - Deliverables
This page took 0.076083 seconds and 5 git commands to generate.