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OMAP3: PM: decouple PER and CORE context save and restore
[linux-ginger.git] / drivers / media / video / zr364xx.c
blob9aae011d92abb9b1beff9e1ff14266166976dfd8
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/version.h>
33 #include <linux/init.h>
34 #include <linux/usb.h>
35 #include <linux/vmalloc.h>
36 #include <linux/slab.h>
37 #include <linux/proc_fs.h>
38 #include <linux/highmem.h>
39 #include <media/v4l2-common.h>
40 #include <media/v4l2-ioctl.h>
41 #include <media/videobuf-vmalloc.h>
42
43
44 /* Version Information */
45 #define DRIVER_VERSION "v0.73"
46 #define ZR364XX_VERSION_CODE KERNEL_VERSION(0, 7, 3)
47 #define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
48 #define DRIVER_DESC "Zoran 364xx"
49
50
51 /* Camera */
52 #define FRAMES 1
53 #define MAX_FRAME_SIZE 200000
54 #define BUFFER_SIZE 0x1000
55 #define CTRL_TIMEOUT 500
56
57 #define ZR364XX_DEF_BUFS 4
58 #define ZR364XX_READ_IDLE 0
59 #define ZR364XX_READ_FRAME 1
60
61 /* Debug macro */
62 #define DBG(fmt, args...) \
63 do { \
64 if (debug) { \
65 printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
66 } \
67 } while (0)
68
69 /*#define FULL_DEBUG 1*/
70 #ifdef FULL_DEBUG
71 #define _DBG DBG
72 #else
73 #define _DBG(fmt, args...)
74 #endif
75
76 /* Init methods, need to find nicer names for these
77 * the exact names of the chipsets would be the best if someone finds it */
78 #define METHOD0 0
79 #define METHOD1 1
80 #define METHOD2 2
81
82
83 /* Module parameters */
84 static int debug;
85 static int mode;
86
87
88 /* Module parameters interface */
89 module_param(debug, int, 0644);
90 MODULE_PARM_DESC(debug, "Debug level");
91 module_param(mode, int, 0644);
92 MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");
93
94
95 /* Devices supported by this driver
96 * .driver_info contains the init method used by the camera */
97 static struct usb_device_id device_table[] = {
98 {USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
99 {USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
100 {USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
101 {USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
102 {USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
103 {USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
104 {USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
105 {USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
106 {USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
107 {USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
108 {USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
109 {USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
110 {USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
111 {USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
112 {USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
113 {USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
114 {USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
115 {USB_DEVICE(0x0a17, 0x004e), .driver_info = METHOD2 },
116 {USB_DEVICE(0x041e, 0x405d), .driver_info = METHOD2 },
117 {USB_DEVICE(0x08ca, 0x2102), .driver_info = METHOD2 },
118 {} /* Terminating entry */
119 };
120
121 MODULE_DEVICE_TABLE(usb, device_table);
122
123 struct zr364xx_mode {
124 u32 color; /* output video color format */
125 u32 brightness; /* brightness */
126 };
127
128 /* frame structure */
129 struct zr364xx_framei {
130 unsigned long ulState; /* ulState:ZR364XX_READ_IDLE,
131 ZR364XX_READ_FRAME */
132 void *lpvbits; /* image data */
133 unsigned long cur_size; /* current data copied to it */
134 };
135
136 /* image buffer structure */
137 struct zr364xx_bufferi {
138 unsigned long dwFrames; /* number of frames in buffer */
139 struct zr364xx_framei frame[FRAMES]; /* array of FRAME structures */
140 };
141
142 struct zr364xx_dmaqueue {
143 struct list_head active;
144 struct zr364xx_camera *cam;
145 };
146
147 struct zr364xx_pipeinfo {
148 u32 transfer_size;
149 u8 *transfer_buffer;
150 u32 state;
151 void *stream_urb;
152 void *cam; /* back pointer to zr364xx_camera struct */
153 u32 err_count;
154 u32 idx;
155 };
156
157 struct zr364xx_fmt {
158 char *name;
159 u32 fourcc;
160 int depth;
161 };
162
163 /* image formats. */
164 static const struct zr364xx_fmt formats[] = {
165 {
166 .name = "JPG",
167 .fourcc = V4L2_PIX_FMT_JPEG,
168 .depth = 24
169 }
170 };
171
172 /* Camera stuff */
173 struct zr364xx_camera {
174 struct usb_device *udev; /* save off the usb device pointer */
175 struct usb_interface *interface;/* the interface for this device */
176 struct video_device *vdev; /* v4l video device */
177 int nb;
178 struct zr364xx_bufferi buffer;
179 int skip;
180 int width;
181 int height;
182 int method;
183 struct mutex lock;
184 struct mutex open_lock;
185 int users;
186
187 spinlock_t slock;
188 struct zr364xx_dmaqueue vidq;
189 int resources;
190 int last_frame;
191 int cur_frame;
192 unsigned long frame_count;
193 int b_acquire;
194 struct zr364xx_pipeinfo pipe[1];
195
196 u8 read_endpoint;
197
198 const struct zr364xx_fmt *fmt;
199 struct videobuf_queue vb_vidq;
200 enum v4l2_buf_type type;
201 struct zr364xx_mode mode;
202 };
203
204 /* buffer for one video frame */
205 struct zr364xx_buffer {
206 /* common v4l buffer stuff -- must be first */
207 struct videobuf_buffer vb;
208 const struct zr364xx_fmt *fmt;
209 };
210
211 /* function used to send initialisation commands to the camera */
212 static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
213 u16 index, unsigned char *cp, u16 size)
214 {
215 int status;
216
217 unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
218 if (!transfer_buffer) {
219 dev_err(&udev->dev, "kmalloc(%d) failed\n", size);
220 return -ENOMEM;
221 }
222
223 memcpy(transfer_buffer, cp, size);
224
225 status = usb_control_msg(udev,
226 usb_sndctrlpipe(udev, 0),
227 request,
228 USB_DIR_OUT | USB_TYPE_VENDOR |
229 USB_RECIP_DEVICE, value, index,
230 transfer_buffer, size, CTRL_TIMEOUT);
231
232 kfree(transfer_buffer);
233
234 if (status < 0)
235 dev_err(&udev->dev,
236 "Failed sending control message, error %d.\n", status);
237
238 return status;
239 }
240
241
242 /* Control messages sent to the camera to initialize it
243 * and launch the capture */
244 typedef struct {
245 unsigned int value;
246 unsigned int size;
247 unsigned char *bytes;
248 } message;
249
250 /* method 0 */
251 static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
252 static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
253 static unsigned char m0d3[] = { 0, 0 };
254 static message m0[] = {
255 {0x1f30, 0, NULL},
256 {0xd000, 0, NULL},
257 {0x3370, sizeof(m0d1), m0d1},
258 {0x2000, 0, NULL},
259 {0x2f0f, 0, NULL},
260 {0x2610, sizeof(m0d2), m0d2},
261 {0xe107, 0, NULL},
262 {0x2502, 0, NULL},
263 {0x1f70, 0, NULL},
264 {0xd000, 0, NULL},
265 {0x9a01, sizeof(m0d3), m0d3},
266 {-1, -1, NULL}
267 };
268
269 /* method 1 */
270 static unsigned char m1d1[] = { 0xff, 0xff };
271 static unsigned char m1d2[] = { 0x00, 0x00 };
272 static message m1[] = {
273 {0x1f30, 0, NULL},
274 {0xd000, 0, NULL},
275 {0xf000, 0, NULL},
276 {0x2000, 0, NULL},
277 {0x2f0f, 0, NULL},
278 {0x2650, 0, NULL},
279 {0xe107, 0, NULL},
280 {0x2502, sizeof(m1d1), m1d1},
281 {0x1f70, 0, NULL},
282 {0xd000, 0, NULL},
283 {0xd000, 0, NULL},
284 {0xd000, 0, NULL},
285 {0x9a01, sizeof(m1d2), m1d2},
286 {-1, -1, NULL}
287 };
288
289 /* method 2 */
290 static unsigned char m2d1[] = { 0xff, 0xff };
291 static message m2[] = {
292 {0x1f30, 0, NULL},
293 {0xf000, 0, NULL},
294 {0x2000, 0, NULL},
295 {0x2f0f, 0, NULL},
296 {0x2650, 0, NULL},
297 {0xe107, 0, NULL},
298 {0x2502, sizeof(m2d1), m2d1},
299 {0x1f70, 0, NULL},
300 {-1, -1, NULL}
301 };
302
303 /* init table */
304 static message *init[3] = { m0, m1, m2 };
305
306
307 /* JPEG static data in header (Huffman table, etc) */
308 static unsigned char header1[] = {
309 0xFF, 0xD8,
310 /*
311 0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
312 0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
313 */
314 0xFF, 0xDB, 0x00, 0x84
315 };
316 static unsigned char header2[] = {
317 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
318 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
319 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
320 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
321 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
322 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
323 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
324 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
325 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
326 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
327 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
328 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
329 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
330 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
331 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
332 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
333 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
334 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
335 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
336 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
337 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
338 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
339 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
340 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
341 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
342 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
343 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
344 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
345 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
346 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
347 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
348 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
349 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
350 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
351 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
352 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
353 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
354 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
355 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
356 0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
357 0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
358 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
359 0x00, 0x3F, 0x00
360 };
361 static unsigned char header3;
362
363 /* ------------------------------------------------------------------
364 Videobuf operations
365 ------------------------------------------------------------------*/
366
367 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
368 unsigned int *size)
369 {
370 struct zr364xx_camera *cam = vq->priv_data;
371
372 *size = cam->width * cam->height * (cam->fmt->depth >> 3);
373
374 if (*count == 0)
375 *count = ZR364XX_DEF_BUFS;
376
377 while (*size * (*count) > ZR364XX_DEF_BUFS * 1024 * 1024)
378 (*count)--;
379
380 return 0;
381 }
382
383 static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
384 {
385 _DBG("%s\n", __func__);
386
387 if (in_interrupt())
388 BUG();
389
390 videobuf_vmalloc_free(&buf->vb);
391 buf->vb.state = VIDEOBUF_NEEDS_INIT;
392 }
393
394 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
395 enum v4l2_field field)
396 {
397 struct zr364xx_camera *cam = vq->priv_data;
398 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
399 vb);
400 int rc;
401
402 DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
403 cam->fmt->name : "");
404 if (cam->fmt == NULL)
405 return -EINVAL;
406
407 buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
408
409 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
410 DBG("invalid buffer prepare\n");
411 return -EINVAL;
412 }
413
414 buf->fmt = cam->fmt;
415 buf->vb.width = cam->width;
416 buf->vb.height = cam->height;
417 buf->vb.field = field;
418
419 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
420 rc = videobuf_iolock(vq, &buf->vb, NULL);
421 if (rc < 0)
422 goto fail;
423 }
424
425 buf->vb.state = VIDEOBUF_PREPARED;
426 return 0;
427 fail:
428 free_buffer(vq, buf);
429 return rc;
430 }
431
432 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
433 {
434 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
435 vb);
436 struct zr364xx_camera *cam = vq->priv_data;
437
438 _DBG("%s\n", __func__);
439
440 buf->vb.state = VIDEOBUF_QUEUED;
441 list_add_tail(&buf->vb.queue, &cam->vidq.active);
442 }
443
444 static void buffer_release(struct videobuf_queue *vq,
445 struct videobuf_buffer *vb)
446 {
447 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
448 vb);
449
450 _DBG("%s\n", __func__);
451 free_buffer(vq, buf);
452 }
453
454 static struct videobuf_queue_ops zr364xx_video_qops = {
455 .buf_setup = buffer_setup,
456 .buf_prepare = buffer_prepare,
457 .buf_queue = buffer_queue,
458 .buf_release = buffer_release,
459 };
460
461 /********************/
462 /* V4L2 integration */
463 /********************/
464 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
465 enum v4l2_buf_type type);
466
467 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
468 loff_t * ppos)
469 {
470 struct zr364xx_camera *cam = video_drvdata(file);
471
472 _DBG("%s\n", __func__);
473
474 if (!buf)
475 return -EINVAL;
476
477 if (!count)
478 return -EINVAL;
479
480 if (cam->type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
481 zr364xx_vidioc_streamon(file, cam, cam->type) == 0) {
482 DBG("%s: reading %d bytes at pos %d.\n", __func__, (int) count,
483 (int) *ppos);
484
485 /* NoMan Sux ! */
486 return videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
487 file->f_flags & O_NONBLOCK);
488 }
489
490 return 0;
491 }
492
493 /* video buffer vmalloc implementation based partly on VIVI driver which is
494 * Copyright (c) 2006 by
495 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
496 * Ted Walther <ted--a.t--enumera.com>
497 * John Sokol <sokol--a.t--videotechnology.com>
498 * http://v4l.videotechnology.com/
499 *
500 */
501 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
502 struct zr364xx_buffer *buf,
503 int jpgsize)
504 {
505 int pos = 0;
506 struct timeval ts;
507 const char *tmpbuf;
508 char *vbuf = videobuf_to_vmalloc(&buf->vb);
509 unsigned long last_frame;
510 struct zr364xx_framei *frm;
511
512 if (!vbuf)
513 return;
514
515 last_frame = cam->last_frame;
516 if (last_frame != -1) {
517 frm = &cam->buffer.frame[last_frame];
518 tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
519 switch (buf->fmt->fourcc) {
520 case V4L2_PIX_FMT_JPEG:
521 buf->vb.size = jpgsize;
522 memcpy(vbuf, tmpbuf, buf->vb.size);
523 break;
524 default:
525 printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
526 }
527 cam->last_frame = -1;
528 } else {
529 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
530 return;
531 }
532 DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
533 (unsigned long)vbuf, pos);
534 /* tell v4l buffer was filled */
535
536 buf->vb.field_count = cam->frame_count * 2;
537 do_gettimeofday(&ts);
538 buf->vb.ts = ts;
539 buf->vb.state = VIDEOBUF_DONE;
540 }
541
542 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
543 {
544 struct zr364xx_dmaqueue *dma_q = &cam->vidq;
545 struct zr364xx_buffer *buf;
546 unsigned long flags = 0;
547 int rc = 0;
548
549 DBG("wakeup: %p\n", &dma_q);
550 spin_lock_irqsave(&cam->slock, flags);
551
552 if (list_empty(&dma_q->active)) {
553 DBG("No active queue to serve\n");
554 rc = -1;
555 goto unlock;
556 }
557 buf = list_entry(dma_q->active.next,
558 struct zr364xx_buffer, vb.queue);
559
560 if (!waitqueue_active(&buf->vb.done)) {
561 /* no one active */
562 rc = -1;
563 goto unlock;
564 }
565 list_del(&buf->vb.queue);
566 do_gettimeofday(&buf->vb.ts);
567 DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
568 zr364xx_fillbuff(cam, buf, jpgsize);
569 wake_up(&buf->vb.done);
570 DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
571 unlock:
572 spin_unlock_irqrestore(&cam->slock, flags);
573 return 0;
574 }
575
576 /* this function moves the usb stream read pipe data
577 * into the system buffers.
578 * returns 0 on success, EAGAIN if more data to process (call this
579 * function again).
580 */
581 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
582 struct zr364xx_pipeinfo *pipe_info,
583 struct urb *purb)
584 {
585 unsigned char *pdest;
586 unsigned char *psrc;
587 s32 idx = -1;
588 struct zr364xx_framei *frm;
589 int i = 0;
590 unsigned char *ptr = NULL;
591
592 _DBG("buffer to user\n");
593 idx = cam->cur_frame;
594 frm = &cam->buffer.frame[idx];
595
596 /* swap bytes if camera needs it */
597 if (cam->method == METHOD0) {
598 u16 *buf = (u16 *)pipe_info->transfer_buffer;
599 for (i = 0; i < purb->actual_length/2; i++)
600 swab16s(buf + i);
601 }
602
603 /* search done. now find out if should be acquiring */
604 if (!cam->b_acquire) {
605 /* we found a frame, but this channel is turned off */
606 frm->ulState = ZR364XX_READ_IDLE;
607 return -EINVAL;
608 }
609
610 psrc = (u8 *)pipe_info->transfer_buffer;
611 ptr = pdest = frm->lpvbits;
612
613 if (frm->ulState == ZR364XX_READ_IDLE) {
614 frm->ulState = ZR364XX_READ_FRAME;
615 frm->cur_size = 0;
616
617 _DBG("jpeg header, ");
618 memcpy(ptr, header1, sizeof(header1));
619 ptr += sizeof(header1);
620 header3 = 0;
621 memcpy(ptr, &header3, 1);
622 ptr++;
623 memcpy(ptr, psrc, 64);
624 ptr += 64;
625 header3 = 1;
626 memcpy(ptr, &header3, 1);
627 ptr++;
628 memcpy(ptr, psrc + 64, 64);
629 ptr += 64;
630 memcpy(ptr, header2, sizeof(header2));
631 ptr += sizeof(header2);
632 memcpy(ptr, psrc + 128,
633 purb->actual_length - 128);
634 ptr += purb->actual_length - 128;
635 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
636 psrc[0], psrc[1], psrc[2],
637 psrc[3], psrc[4], psrc[5],
638 psrc[6], psrc[7], psrc[8]);
639 frm->cur_size = ptr - pdest;
640 } else {
641 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
642 dev_info(&cam->udev->dev,
643 "%s: buffer (%d bytes) too small to hold "
644 "frame data. Discarding frame data.\n",
645 __func__, MAX_FRAME_SIZE);
646 } else {
647 pdest += frm->cur_size;
648 memcpy(pdest, psrc, purb->actual_length);
649 frm->cur_size += purb->actual_length;
650 }
651 }
652 /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
653 purb->actual_length);*/
654
655 if (purb->actual_length < pipe_info->transfer_size) {
656 _DBG("****************Buffer[%d]full*************\n", idx);
657 cam->last_frame = cam->cur_frame;
658 cam->cur_frame++;
659 /* end of system frame ring buffer, start at zero */
660 if (cam->cur_frame == cam->buffer.dwFrames)
661 cam->cur_frame = 0;
662
663 /* frame ready */
664 /* go back to find the JPEG EOI marker */
665 ptr = pdest = frm->lpvbits;
666 ptr += frm->cur_size - 2;
667 while (ptr > pdest) {
668 if (*ptr == 0xFF && *(ptr + 1) == 0xD9
669 && *(ptr + 2) == 0xFF)
670 break;
671 ptr--;
672 }
673 if (ptr == pdest)
674 DBG("No EOI marker\n");
675
676 /* Sometimes there is junk data in the middle of the picture,
677 * we want to skip this bogus frames */
678 while (ptr > pdest) {
679 if (*ptr == 0xFF && *(ptr + 1) == 0xFF
680 && *(ptr + 2) == 0xFF)
681 break;
682 ptr--;
683 }
684 if (ptr != pdest) {
685 DBG("Bogus frame ? %d\n", ++(cam->nb));
686 } else if (cam->b_acquire) {
687 /* we skip the 2 first frames which are usually buggy */
688 if (cam->skip)
689 cam->skip--;
690 else {
691 _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
692 frm->cur_size,
693 pdest[0], pdest[1], pdest[2], pdest[3],
694 pdest[4], pdest[5], pdest[6], pdest[7]);
695
696 zr364xx_got_frame(cam, frm->cur_size);
697 }
698 }
699 cam->frame_count++;
700 frm->ulState = ZR364XX_READ_IDLE;
701 frm->cur_size = 0;
702 }
703 /* done successfully */
704 return 0;
705 }
706
707 static int res_get(struct zr364xx_camera *cam)
708 {
709 /* is it free? */
710 mutex_lock(&cam->lock);
711 if (cam->resources) {
712 /* no, someone else uses it */
713 mutex_unlock(&cam->lock);
714 return 0;
715 }
716 /* it's free, grab it */
717 cam->resources = 1;
718 _DBG("res: get\n");
719 mutex_unlock(&cam->lock);
720 return 1;
721 }
722
723 static inline int res_check(struct zr364xx_camera *cam)
724 {
725 return cam->resources;
726 }
727
728 static void res_free(struct zr364xx_camera *cam)
729 {
730 mutex_lock(&cam->lock);
731 cam->resources = 0;
732 mutex_unlock(&cam->lock);
733 _DBG("res: put\n");
734 }
735
736 static int zr364xx_vidioc_querycap(struct file *file, void *priv,
737 struct v4l2_capability *cap)
738 {
739 struct zr364xx_camera *cam = video_drvdata(file);
740
741 strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
742 strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
743 strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
744 sizeof(cap->bus_info));
745 cap->version = ZR364XX_VERSION_CODE;
746 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
747 V4L2_CAP_READWRITE |
748 V4L2_CAP_STREAMING;
749
750 return 0;
751 }
752
753 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
754 struct v4l2_input *i)
755 {
756 if (i->index != 0)
757 return -EINVAL;
758 strcpy(i->name, DRIVER_DESC " Camera");
759 i->type = V4L2_INPUT_TYPE_CAMERA;
760 return 0;
761 }
762
763 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
764 unsigned int *i)
765 {
766 *i = 0;
767 return 0;
768 }
769
770 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
771 unsigned int i)
772 {
773 if (i != 0)
774 return -EINVAL;
775 return 0;
776 }
777
778 static int zr364xx_vidioc_queryctrl(struct file *file, void *priv,
779 struct v4l2_queryctrl *c)
780 {
781 struct zr364xx_camera *cam;
782
783 if (file == NULL)
784 return -ENODEV;
785 cam = video_drvdata(file);
786
787 switch (c->id) {
788 case V4L2_CID_BRIGHTNESS:
789 c->type = V4L2_CTRL_TYPE_INTEGER;
790 strcpy(c->name, "Brightness");
791 c->minimum = 0;
792 c->maximum = 127;
793 c->step = 1;
794 c->default_value = cam->mode.brightness;
795 c->flags = 0;
796 break;
797 default:
798 return -EINVAL;
799 }
800 return 0;
801 }
802
803 static int zr364xx_vidioc_s_ctrl(struct file *file, void *priv,
804 struct v4l2_control *c)
805 {
806 struct zr364xx_camera *cam;
807 int temp;
808
809 if (file == NULL)
810 return -ENODEV;
811 cam = video_drvdata(file);
812
813 switch (c->id) {
814 case V4L2_CID_BRIGHTNESS:
815 cam->mode.brightness = c->value;
816 /* hardware brightness */
817 mutex_lock(&cam->lock);
818 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
819 temp = (0x60 << 8) + 127 - cam->mode.brightness;
820 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
821 mutex_unlock(&cam->lock);
822 break;
823 default:
824 return -EINVAL;
825 }
826
827 return 0;
828 }
829
830 static int zr364xx_vidioc_g_ctrl(struct file *file, void *priv,
831 struct v4l2_control *c)
832 {
833 struct zr364xx_camera *cam;
834
835 if (file == NULL)
836 return -ENODEV;
837 cam = video_drvdata(file);
838
839 switch (c->id) {
840 case V4L2_CID_BRIGHTNESS:
841 c->value = cam->mode.brightness;
842 break;
843 default:
844 return -EINVAL;
845 }
846 return 0;
847 }
848
849 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
850 void *priv, struct v4l2_fmtdesc *f)
851 {
852 if (f->index > 0)
853 return -EINVAL;
854 f->flags = V4L2_FMT_FLAG_COMPRESSED;
855 strcpy(f->description, formats[0].name);
856 f->pixelformat = formats[0].fourcc;
857 return 0;
858 }
859
860 static char *decode_fourcc(__u32 pixelformat, char *buf)
861 {
862 buf[0] = pixelformat & 0xff;
863 buf[1] = (pixelformat >> 8) & 0xff;
864 buf[2] = (pixelformat >> 16) & 0xff;
865 buf[3] = (pixelformat >> 24) & 0xff;
866 buf[4] = '\0';
867 return buf;
868 }
869
870 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
871 struct v4l2_format *f)
872 {
873 struct zr364xx_camera *cam = video_drvdata(file);
874 char pixelformat_name[5];
875
876 if (cam == NULL)
877 return -ENODEV;
878
879 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
880 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
881 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
882 return -EINVAL;
883 }
884
885 if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
886 !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
887 f->fmt.pix.width = 320;
888 f->fmt.pix.height = 240;
889 }
890
891 f->fmt.pix.field = V4L2_FIELD_NONE;
892 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
893 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
894 f->fmt.pix.colorspace = 0;
895 f->fmt.pix.priv = 0;
896 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
897 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
898 f->fmt.pix.field);
899 return 0;
900 }
901
902 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
903 struct v4l2_format *f)
904 {
905 struct zr364xx_camera *cam;
906
907 if (file == NULL)
908 return -ENODEV;
909 cam = video_drvdata(file);
910
911 f->fmt.pix.pixelformat = formats[0].fourcc;
912 f->fmt.pix.field = V4L2_FIELD_NONE;
913 f->fmt.pix.width = cam->width;
914 f->fmt.pix.height = cam->height;
915 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
916 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
917 f->fmt.pix.colorspace = 0;
918 f->fmt.pix.priv = 0;
919 return 0;
920 }
921
922 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
923 struct v4l2_format *f)
924 {
925 struct zr364xx_camera *cam = video_drvdata(file);
926 struct videobuf_queue *q = &cam->vb_vidq;
927 char pixelformat_name[5];
928 int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
929 int i;
930
931 if (ret < 0)
932 return ret;
933
934 mutex_lock(&q->vb_lock);
935
936 if (videobuf_queue_is_busy(&cam->vb_vidq)) {
937 DBG("%s queue busy\n", __func__);
938 ret = -EBUSY;
939 goto out;
940 }
941
942 if (res_check(cam)) {
943 DBG("%s can't change format after started\n", __func__);
944 ret = -EBUSY;
945 goto out;
946 }
947
948 cam->width = f->fmt.pix.width;
949 cam->height = f->fmt.pix.height;
950 dev_info(&cam->udev->dev, "%s: %dx%d mode selected\n", __func__,
951 cam->width, cam->height);
952 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
953 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
954 f->fmt.pix.colorspace = 0;
955 f->fmt.pix.priv = 0;
956 cam->vb_vidq.field = f->fmt.pix.field;
957 cam->mode.color = V4L2_PIX_FMT_JPEG;
958
959 if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
960 mode = 1;
961 else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
962 mode = 2;
963 else
964 mode = 0;
965
966 m0d1[0] = mode;
967 m1[2].value = 0xf000 + mode;
968 m2[1].value = 0xf000 + mode;
969 header2[437] = cam->height / 256;
970 header2[438] = cam->height % 256;
971 header2[439] = cam->width / 256;
972 header2[440] = cam->width % 256;
973
974 for (i = 0; init[cam->method][i].size != -1; i++) {
975 ret =
976 send_control_msg(cam->udev, 1, init[cam->method][i].value,
977 0, init[cam->method][i].bytes,
978 init[cam->method][i].size);
979 if (ret < 0) {
980 dev_err(&cam->udev->dev,
981 "error during resolution change sequence: %d\n", i);
982 goto out;
983 }
984 }
985
986 /* Added some delay here, since opening/closing the camera quickly,
987 * like Ekiga does during its startup, can crash the webcam
988 */
989 mdelay(100);
990 cam->skip = 2;
991 ret = 0;
992
993 out:
994 mutex_unlock(&q->vb_lock);
995
996 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
997 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
998 f->fmt.pix.field);
999 return ret;
1000 }
1001
1002 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
1003 struct v4l2_requestbuffers *p)
1004 {
1005 int rc;
1006 struct zr364xx_camera *cam = video_drvdata(file);
1007 rc = videobuf_reqbufs(&cam->vb_vidq, p);
1008 return rc;
1009 }
1010
1011 static int zr364xx_vidioc_querybuf(struct file *file,
1012 void *priv,
1013 struct v4l2_buffer *p)
1014 {
1015 int rc;
1016 struct zr364xx_camera *cam = video_drvdata(file);
1017 rc = videobuf_querybuf(&cam->vb_vidq, p);
1018 return rc;
1019 }
1020
1021 static int zr364xx_vidioc_qbuf(struct file *file,
1022 void *priv,
1023 struct v4l2_buffer *p)
1024 {
1025 int rc;
1026 struct zr364xx_camera *cam = video_drvdata(file);
1027 _DBG("%s\n", __func__);
1028 rc = videobuf_qbuf(&cam->vb_vidq, p);
1029 return rc;
1030 }
1031
1032 static int zr364xx_vidioc_dqbuf(struct file *file,
1033 void *priv,
1034 struct v4l2_buffer *p)
1035 {
1036 int rc;
1037 struct zr364xx_camera *cam = video_drvdata(file);
1038 _DBG("%s\n", __func__);
1039 rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
1040 return rc;
1041 }
1042
1043 static void read_pipe_completion(struct urb *purb)
1044 {
1045 struct zr364xx_pipeinfo *pipe_info;
1046 struct zr364xx_camera *cam;
1047 int pipe;
1048
1049 pipe_info = purb->context;
1050 _DBG("%s %p, status %d\n", __func__, purb, purb->status);
1051 if (pipe_info == NULL) {
1052 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
1053 return;
1054 }
1055
1056 cam = pipe_info->cam;
1057 if (cam == NULL) {
1058 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
1059 return;
1060 }
1061
1062 /* if shutting down, do not resubmit, exit immediately */
1063 if (purb->status == -ESHUTDOWN) {
1064 DBG("%s, err shutdown\n", __func__);
1065 pipe_info->err_count++;
1066 return;
1067 }
1068
1069 if (pipe_info->state == 0) {
1070 DBG("exiting USB pipe\n");
1071 return;
1072 }
1073
1074 if (purb->actual_length < 0 ||
1075 purb->actual_length > pipe_info->transfer_size) {
1076 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1077 return;
1078 }
1079
1080 if (purb->status == 0)
1081 zr364xx_read_video_callback(cam, pipe_info, purb);
1082 else {
1083 pipe_info->err_count++;
1084 DBG("%s: failed URB %d\n", __func__, purb->status);
1085 }
1086
1087 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1088
1089 /* reuse urb */
1090 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1091 pipe,
1092 pipe_info->transfer_buffer,
1093 pipe_info->transfer_size,
1094 read_pipe_completion, pipe_info);
1095
1096 if (pipe_info->state != 0) {
1097 purb->status = usb_submit_urb(pipe_info->stream_urb,
1098 GFP_ATOMIC);
1099
1100 if (purb->status)
1101 dev_err(&cam->udev->dev,
1102 "error submitting urb (error=%i)\n",
1103 purb->status);
1104 } else
1105 DBG("read pipe complete state 0\n");
1106 }
1107
1108 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1109 {
1110 int pipe;
1111 int retval;
1112 struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1113 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1114 DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1115
1116 pipe_info->state = 1;
1117 pipe_info->err_count = 0;
1118 pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1119 if (!pipe_info->stream_urb) {
1120 dev_err(&cam->udev->dev, "ReadStream: Unable to alloc URB\n");
1121 return -ENOMEM;
1122 }
1123 /* transfer buffer allocated in board_init */
1124 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1125 pipe,
1126 pipe_info->transfer_buffer,
1127 pipe_info->transfer_size,
1128 read_pipe_completion, pipe_info);
1129
1130 DBG("submitting URB %p\n", pipe_info->stream_urb);
1131 retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1132 if (retval) {
1133 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1134 return retval;
1135 }
1136
1137 return 0;
1138 }
1139
1140 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1141 {
1142 struct zr364xx_pipeinfo *pipe_info;
1143
1144 if (cam == NULL) {
1145 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1146 return;
1147 }
1148 DBG("stop read pipe\n");
1149 pipe_info = cam->pipe;
1150 if (pipe_info) {
1151 if (pipe_info->state != 0)
1152 pipe_info->state = 0;
1153
1154 if (pipe_info->stream_urb) {
1155 /* cancel urb */
1156 usb_kill_urb(pipe_info->stream_urb);
1157 usb_free_urb(pipe_info->stream_urb);
1158 pipe_info->stream_urb = NULL;
1159 }
1160 }
1161 return;
1162 }
1163
1164 /* starts acquisition process */
1165 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1166 {
1167 int j;
1168
1169 DBG("start acquire\n");
1170
1171 cam->last_frame = -1;
1172 cam->cur_frame = 0;
1173 for (j = 0; j < FRAMES; j++) {
1174 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1175 cam->buffer.frame[j].cur_size = 0;
1176 }
1177 cam->b_acquire = 1;
1178 return 0;
1179 }
1180
1181 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1182 {
1183 cam->b_acquire = 0;
1184 return 0;
1185 }
1186
1187 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1188 enum v4l2_buf_type type)
1189 {
1190 struct zr364xx_camera *cam = video_drvdata(file);
1191 int j;
1192 int res;
1193
1194 DBG("%s\n", __func__);
1195
1196 if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1197 dev_err(&cam->udev->dev, "invalid fh type0\n");
1198 return -EINVAL;
1199 }
1200 if (cam->type != type) {
1201 dev_err(&cam->udev->dev, "invalid fh type1\n");
1202 return -EINVAL;
1203 }
1204
1205 if (!res_get(cam)) {
1206 dev_err(&cam->udev->dev, "stream busy\n");
1207 return -EBUSY;
1208 }
1209
1210 cam->last_frame = -1;
1211 cam->cur_frame = 0;
1212 cam->frame_count = 0;
1213 for (j = 0; j < FRAMES; j++) {
1214 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1215 cam->buffer.frame[j].cur_size = 0;
1216 }
1217 res = videobuf_streamon(&cam->vb_vidq);
1218 if (res == 0) {
1219 zr364xx_start_acquire(cam);
1220 } else {
1221 res_free(cam);
1222 }
1223 return res;
1224 }
1225
1226 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1227 enum v4l2_buf_type type)
1228 {
1229 int res;
1230 struct zr364xx_camera *cam = video_drvdata(file);
1231
1232 DBG("%s\n", __func__);
1233 if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1234 dev_err(&cam->udev->dev, "invalid fh type0\n");
1235 return -EINVAL;
1236 }
1237 if (cam->type != type) {
1238 dev_err(&cam->udev->dev, "invalid fh type1\n");
1239 return -EINVAL;
1240 }
1241 zr364xx_stop_acquire(cam);
1242 res = videobuf_streamoff(&cam->vb_vidq);
1243 if (res < 0)
1244 return res;
1245 res_free(cam);
1246 return 0;
1247 }
1248
1249
1250 /* open the camera */
1251 static int zr364xx_open(struct file *file)
1252 {
1253 struct video_device *vdev = video_devdata(file);
1254 struct zr364xx_camera *cam = video_drvdata(file);
1255 struct usb_device *udev = cam->udev;
1256 int i, err;
1257
1258 DBG("%s\n", __func__);
1259
1260 mutex_lock(&cam->open_lock);
1261
1262 if (cam->users) {
1263 err = -EBUSY;
1264 goto out;
1265 }
1266
1267 for (i = 0; init[cam->method][i].size != -1; i++) {
1268 err =
1269 send_control_msg(udev, 1, init[cam->method][i].value,
1270 0, init[cam->method][i].bytes,
1271 init[cam->method][i].size);
1272 if (err < 0) {
1273 dev_err(&cam->udev->dev,
1274 "error during open sequence: %d\n", i);
1275 goto out;
1276 }
1277 }
1278
1279 cam->skip = 2;
1280 cam->users++;
1281 file->private_data = vdev;
1282 cam->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1283 cam->fmt = formats;
1284
1285 videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1286 NULL, &cam->slock,
1287 cam->type,
1288 V4L2_FIELD_NONE,
1289 sizeof(struct zr364xx_buffer), cam);
1290
1291 /* Added some delay here, since opening/closing the camera quickly,
1292 * like Ekiga does during its startup, can crash the webcam
1293 */
1294 mdelay(100);
1295 err = 0;
1296
1297 out:
1298 mutex_unlock(&cam->open_lock);
1299 DBG("%s: %d\n", __func__, err);
1300 return err;
1301 }
1302
1303 static void zr364xx_destroy(struct zr364xx_camera *cam)
1304 {
1305 unsigned long i;
1306
1307 if (!cam) {
1308 printk(KERN_ERR KBUILD_MODNAME ", %s: no device\n", __func__);
1309 return;
1310 }
1311 mutex_lock(&cam->open_lock);
1312 if (cam->vdev)
1313 video_unregister_device(cam->vdev);
1314 cam->vdev = NULL;
1315
1316 /* stops the read pipe if it is running */
1317 if (cam->b_acquire)
1318 zr364xx_stop_acquire(cam);
1319
1320 zr364xx_stop_readpipe(cam);
1321
1322 /* release sys buffers */
1323 for (i = 0; i < FRAMES; i++) {
1324 if (cam->buffer.frame[i].lpvbits) {
1325 DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1326 vfree(cam->buffer.frame[i].lpvbits);
1327 }
1328 cam->buffer.frame[i].lpvbits = NULL;
1329 }
1330
1331 /* release transfer buffer */
1332 kfree(cam->pipe->transfer_buffer);
1333 cam->pipe->transfer_buffer = NULL;
1334 mutex_unlock(&cam->open_lock);
1335 kfree(cam);
1336 cam = NULL;
1337 }
1338
1339 /* release the camera */
1340 static int zr364xx_release(struct file *file)
1341 {
1342 struct zr364xx_camera *cam;
1343 struct usb_device *udev;
1344 int i, err;
1345
1346 DBG("%s\n", __func__);
1347 cam = video_drvdata(file);
1348
1349 if (!cam)
1350 return -ENODEV;
1351
1352 mutex_lock(&cam->open_lock);
1353 udev = cam->udev;
1354
1355 /* turn off stream */
1356 if (res_check(cam)) {
1357 if (cam->b_acquire)
1358 zr364xx_stop_acquire(cam);
1359 videobuf_streamoff(&cam->vb_vidq);
1360 res_free(cam);
1361 }
1362
1363 cam->users--;
1364 file->private_data = NULL;
1365
1366 for (i = 0; i < 2; i++) {
1367 err =
1368 send_control_msg(udev, 1, init[cam->method][i].value,
1369 0, init[cam->method][i].bytes,
1370 init[cam->method][i].size);
1371 if (err < 0) {
1372 dev_err(&udev->dev, "error during release sequence\n");
1373 goto out;
1374 }
1375 }
1376
1377 /* Added some delay here, since opening/closing the camera quickly,
1378 * like Ekiga does during its startup, can crash the webcam
1379 */
1380 mdelay(100);
1381 err = 0;
1382
1383 out:
1384 mutex_unlock(&cam->open_lock);
1385
1386 return err;
1387 }
1388
1389
1390 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1391 {
1392 struct zr364xx_camera *cam = video_drvdata(file);
1393 int ret;
1394
1395 if (cam == NULL) {
1396 DBG("%s: cam == NULL\n", __func__);
1397 return -ENODEV;
1398 }
1399 DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1400
1401 ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1402
1403 DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1404 (unsigned long)vma->vm_start,
1405 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1406 return ret;
1407 }
1408
1409 static unsigned int zr364xx_poll(struct file *file,
1410 struct poll_table_struct *wait)
1411 {
1412 struct zr364xx_camera *cam = video_drvdata(file);
1413 struct videobuf_queue *q = &cam->vb_vidq;
1414 _DBG("%s\n", __func__);
1415
1416 if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1417 return POLLERR;
1418
1419 return videobuf_poll_stream(file, q, wait);
1420 }
1421
1422 static const struct v4l2_file_operations zr364xx_fops = {
1423 .owner = THIS_MODULE,
1424 .open = zr364xx_open,
1425 .release = zr364xx_release,
1426 .read = zr364xx_read,
1427 .mmap = zr364xx_mmap,
1428 .ioctl = video_ioctl2,
1429 .poll = zr364xx_poll,
1430 };
1431
1432 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1433 .vidioc_querycap = zr364xx_vidioc_querycap,
1434 .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1435 .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1436 .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
1437 .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
1438 .vidioc_enum_input = zr364xx_vidioc_enum_input,
1439 .vidioc_g_input = zr364xx_vidioc_g_input,
1440 .vidioc_s_input = zr364xx_vidioc_s_input,
1441 .vidioc_streamon = zr364xx_vidioc_streamon,
1442 .vidioc_streamoff = zr364xx_vidioc_streamoff,
1443 .vidioc_queryctrl = zr364xx_vidioc_queryctrl,
1444 .vidioc_g_ctrl = zr364xx_vidioc_g_ctrl,
1445 .vidioc_s_ctrl = zr364xx_vidioc_s_ctrl,
1446 .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
1447 .vidioc_querybuf = zr364xx_vidioc_querybuf,
1448 .vidioc_qbuf = zr364xx_vidioc_qbuf,
1449 .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
1450 };
1451
1452 static struct video_device zr364xx_template = {
1453 .name = DRIVER_DESC,
1454 .fops = &zr364xx_fops,
1455 .ioctl_ops = &zr364xx_ioctl_ops,
1456 .release = video_device_release,
1457 .minor = -1,
1458 };
1459
1460
1461
1462 /*******************/
1463 /* USB integration */
1464 /*******************/
1465 static int zr364xx_board_init(struct zr364xx_camera *cam)
1466 {
1467 struct zr364xx_pipeinfo *pipe = cam->pipe;
1468 unsigned long i;
1469
1470 DBG("board init: %p\n", cam);
1471 memset(pipe, 0, sizeof(*pipe));
1472 pipe->cam = cam;
1473 pipe->transfer_size = BUFFER_SIZE;
1474
1475 pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1476 GFP_KERNEL);
1477 if (pipe->transfer_buffer == NULL) {
1478 DBG("out of memory!\n");
1479 return -ENOMEM;
1480 }
1481
1482 cam->b_acquire = 0;
1483 cam->frame_count = 0;
1484
1485 /*** start create system buffers ***/
1486 for (i = 0; i < FRAMES; i++) {
1487 /* always allocate maximum size for system buffers */
1488 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1489
1490 DBG("valloc %p, idx %lu, pdata %p\n",
1491 &cam->buffer.frame[i], i,
1492 cam->buffer.frame[i].lpvbits);
1493 if (cam->buffer.frame[i].lpvbits == NULL) {
1494 printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1495 "Using less frames\n");
1496 break;
1497 }
1498 }
1499
1500 if (i == 0) {
1501 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1502 kfree(cam->pipe->transfer_buffer);
1503 cam->pipe->transfer_buffer = NULL;
1504 return -ENOMEM;
1505 } else
1506 cam->buffer.dwFrames = i;
1507
1508 /* make sure internal states are set */
1509 for (i = 0; i < FRAMES; i++) {
1510 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1511 cam->buffer.frame[i].cur_size = 0;
1512 }
1513
1514 cam->cur_frame = 0;
1515 cam->last_frame = -1;
1516 /*** end create system buffers ***/
1517
1518 /* start read pipe */
1519 zr364xx_start_readpipe(cam);
1520 DBG(": board initialized\n");
1521 return 0;
1522 }
1523
1524 static int zr364xx_probe(struct usb_interface *intf,
1525 const struct usb_device_id *id)
1526 {
1527 struct usb_device *udev = interface_to_usbdev(intf);
1528 struct zr364xx_camera *cam = NULL;
1529 struct usb_host_interface *iface_desc;
1530 struct usb_endpoint_descriptor *endpoint;
1531 int err;
1532 int i;
1533
1534 DBG("probing...\n");
1535
1536 dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1537 dev_info(&intf->dev, "model %04x:%04x detected\n",
1538 le16_to_cpu(udev->descriptor.idVendor),
1539 le16_to_cpu(udev->descriptor.idProduct));
1540
1541 cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1542 if (cam == NULL) {
1543 dev_err(&udev->dev, "cam: out of memory !\n");
1544 return -ENOMEM;
1545 }
1546 /* save the init method used by this camera */
1547 cam->method = id->driver_info;
1548
1549 cam->vdev = video_device_alloc();
1550 if (cam->vdev == NULL) {
1551 dev_err(&udev->dev, "cam->vdev: out of memory !\n");
1552 kfree(cam);
1553 cam = NULL;
1554 return -ENOMEM;
1555 }
1556 memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template));
1557 cam->vdev->parent = &intf->dev;
1558 video_set_drvdata(cam->vdev, cam);
1559 if (debug)
1560 cam->vdev->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
1561
1562 cam->udev = udev;
1563
1564 switch (mode) {
1565 case 1:
1566 dev_info(&udev->dev, "160x120 mode selected\n");
1567 cam->width = 160;
1568 cam->height = 120;
1569 break;
1570 case 2:
1571 dev_info(&udev->dev, "640x480 mode selected\n");
1572 cam->width = 640;
1573 cam->height = 480;
1574 break;
1575 default:
1576 dev_info(&udev->dev, "320x240 mode selected\n");
1577 cam->width = 320;
1578 cam->height = 240;
1579 break;
1580 }
1581
1582 m0d1[0] = mode;
1583 m1[2].value = 0xf000 + mode;
1584 m2[1].value = 0xf000 + mode;
1585 header2[437] = cam->height / 256;
1586 header2[438] = cam->height % 256;
1587 header2[439] = cam->width / 256;
1588 header2[440] = cam->width % 256;
1589
1590 cam->users = 0;
1591 cam->nb = 0;
1592 cam->mode.brightness = 64;
1593 mutex_init(&cam->lock);
1594 mutex_init(&cam->open_lock);
1595
1596 DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1597
1598 /* set up the endpoint information */
1599 iface_desc = intf->cur_altsetting;
1600 DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1601 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1602 endpoint = &iface_desc->endpoint[i].desc;
1603 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1604 /* we found the bulk in endpoint */
1605 cam->read_endpoint = endpoint->bEndpointAddress;
1606 }
1607 }
1608
1609 if (!cam->read_endpoint) {
1610 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1611 return -ENOMEM;
1612 }
1613
1614 /* v4l */
1615 INIT_LIST_HEAD(&cam->vidq.active);
1616 cam->vidq.cam = cam;
1617 err = video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1);
1618 if (err) {
1619 dev_err(&udev->dev, "video_register_device failed\n");
1620 video_device_release(cam->vdev);
1621 kfree(cam);
1622 cam = NULL;
1623 return err;
1624 }
1625
1626 usb_set_intfdata(intf, cam);
1627
1628 /* load zr364xx board specific */
1629 err = zr364xx_board_init(cam);
1630 if (err) {
1631 spin_lock_init(&cam->slock);
1632 return err;
1633 }
1634
1635 spin_lock_init(&cam->slock);
1636
1637 dev_info(&udev->dev, DRIVER_DESC " controlling video device %d\n",
1638 cam->vdev->num);
1639 return 0;
1640 }
1641
1642
1643 static void zr364xx_disconnect(struct usb_interface *intf)
1644 {
1645 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1646 videobuf_mmap_free(&cam->vb_vidq);
1647 usb_set_intfdata(intf, NULL);
1648 dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1649 zr364xx_destroy(cam);
1650 }
1651
1652
1653
1654 /**********************/
1655 /* Module integration */
1656 /**********************/
1657
1658 static struct usb_driver zr364xx_driver = {
1659 .name = "zr364xx",
1660 .probe = zr364xx_probe,
1661 .disconnect = zr364xx_disconnect,
1662 .id_table = device_table
1663 };
1664
1665
1666 static int __init zr364xx_init(void)
1667 {
1668 int retval;
1669 retval = usb_register(&zr364xx_driver);
1670 if (retval)
1671 printk(KERN_ERR KBUILD_MODNAME ": usb_register failed!\n");
1672 else
1673 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1674 return retval;
1675 }
1676
1677
1678 static void __exit zr364xx_exit(void)
1679 {
1680 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC " module unloaded\n");
1681 usb_deregister(&zr364xx_driver);
1682 }
1683
1684
1685 module_init(zr364xx_init);
1686 module_exit(zr364xx_exit);
1687
1688 MODULE_AUTHOR(DRIVER_AUTHOR);
1689 MODULE_DESCRIPTION(DRIVER_DESC);
1690 MODULE_LICENSE("GPL");
Linux for Ginger Game Console