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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / media / video / sn9c102 / sn9c102_core.c
blob4a7711c3e745f33f6e362ed246490a5e4d0971fe
1 /***************************************************************************
2 * V4L2 driver for SN9C1xx PC Camera Controllers *
3 * *
4 * Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/param.h>
25 #include <linux/errno.h>
26 #include <linux/slab.h>
27 #include <linux/device.h>
28 #include <linux/fs.h>
29 #include <linux/delay.h>
30 #include <linux/compiler.h>
31 #include <linux/ioctl.h>
32 #include <linux/poll.h>
33 #include <linux/stat.h>
34 #include <linux/mm.h>
35 #include <linux/vmalloc.h>
36 #include <linux/page-flags.h>
37 #include <asm/byteorder.h>
38 #include <asm/page.h>
39 #include <asm/uaccess.h>
40
41 #include "sn9c102.h"
42
43 /*****************************************************************************/
44
45 #define SN9C102_MODULE_NAME "V4L2 driver for SN9C1xx PC Camera Controllers"
46 #define SN9C102_MODULE_ALIAS "sn9c1xx"
47 #define SN9C102_MODULE_AUTHOR "(C) 2004-2007 Luca Risolia"
48 #define SN9C102_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
49 #define SN9C102_MODULE_LICENSE "GPL"
50 #define SN9C102_MODULE_VERSION "1:1.47pre49"
51 #define SN9C102_MODULE_VERSION_CODE KERNEL_VERSION(1, 1, 47)
52
53 /*****************************************************************************/
54
55 MODULE_DEVICE_TABLE(usb, sn9c102_id_table);
56
57 MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL);
58 MODULE_DESCRIPTION(SN9C102_MODULE_NAME);
59 MODULE_ALIAS(SN9C102_MODULE_ALIAS);
60 MODULE_VERSION(SN9C102_MODULE_VERSION);
61 MODULE_LICENSE(SN9C102_MODULE_LICENSE);
62
63 static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1};
64 module_param_array(video_nr, short, NULL, 0444);
65 MODULE_PARM_DESC(video_nr,
66 " <-1|n[,...]>"
67 "\nSpecify V4L2 minor mode number."
68 "\n-1 = use next available (default)"
69 "\n n = use minor number n (integer >= 0)"
70 "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES)
71 " cameras this way."
72 "\nFor example:"
73 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
74 "\nthe second camera and use auto for the first"
75 "\none and for every other camera."
76 "\n");
77
78 static short force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] =
79 SN9C102_FORCE_MUNMAP};
80 module_param_array(force_munmap, bool, NULL, 0444);
81 MODULE_PARM_DESC(force_munmap,
82 " <0|1[,...]>"
83 "\nForce the application to unmap previously"
84 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
85 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
86 "\nthis feature. This parameter is specific for each"
87 "\ndetected camera."
88 "\n0 = do not force memory unmapping"
89 "\n1 = force memory unmapping (save memory)"
90 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
91 "\n");
92
93 static unsigned int frame_timeout[] = {[0 ... SN9C102_MAX_DEVICES-1] =
94 SN9C102_FRAME_TIMEOUT};
95 module_param_array(frame_timeout, uint, NULL, 0644);
96 MODULE_PARM_DESC(frame_timeout,
97 " <0|n[,...]>"
98 "\nTimeout for a video frame in seconds before"
99 "\nreturning an I/O error; 0 for infinity."
100 "\nThis parameter is specific for each detected camera."
101 "\nDefault value is "__MODULE_STRING(SN9C102_FRAME_TIMEOUT)"."
102 "\n");
103
104 #ifdef SN9C102_DEBUG
105 static unsigned short debug = SN9C102_DEBUG_LEVEL;
106 module_param(debug, ushort, 0644);
107 MODULE_PARM_DESC(debug,
108 " <n>"
109 "\nDebugging information level, from 0 to 3:"
110 "\n0 = none (use carefully)"
111 "\n1 = critical errors"
112 "\n2 = significant informations"
113 "\n3 = more verbose messages"
114 "\nLevel 3 is useful for testing only."
115 "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"."
116 "\n");
117 #endif
118
119 /*
120 Add the probe entries to this table. Be sure to add the entry in the right
121 place, since, on failure, the next probing routine is called according to
122 the order of the list below, from top to bottom.
123 */
124 static int (*sn9c102_sensor_table[])(struct sn9c102_device *) = {
125 &sn9c102_probe_hv7131d, /* strong detection based on SENSOR ids */
126 &sn9c102_probe_hv7131r, /* strong detection based on SENSOR ids */
127 &sn9c102_probe_mi0343, /* strong detection based on SENSOR ids */
128 &sn9c102_probe_mi0360, /* strong detection based on SENSOR ids */
129 &sn9c102_probe_mt9v111, /* strong detection based on SENSOR ids */
130 &sn9c102_probe_pas106b, /* strong detection based on SENSOR ids */
131 &sn9c102_probe_pas202bcb, /* strong detection based on SENSOR ids */
132 &sn9c102_probe_ov7630, /* strong detection based on SENSOR ids */
133 &sn9c102_probe_ov7660, /* strong detection based on SENSOR ids */
134 &sn9c102_probe_tas5110c1b, /* detection based on USB pid/vid */
135 &sn9c102_probe_tas5110d, /* detection based on USB pid/vid */
136 &sn9c102_probe_tas5130d1b, /* detection based on USB pid/vid */
137 };
138
139 /*****************************************************************************/
140
141 static u32
142 sn9c102_request_buffers(struct sn9c102_device* cam, u32 count,
143 enum sn9c102_io_method io)
144 {
145 struct v4l2_pix_format* p = &(cam->sensor.pix_format);
146 struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
147 size_t imagesize = cam->module_param.force_munmap || io == IO_READ ?
148 (p->width * p->height * p->priv) / 8 :
149 (r->width * r->height * p->priv) / 8;
150 void* buff = NULL;
151 u32 i;
152
153 if (count > SN9C102_MAX_FRAMES)
154 count = SN9C102_MAX_FRAMES;
155
156 if (cam->bridge == BRIDGE_SN9C105 || cam->bridge == BRIDGE_SN9C120)
157 imagesize += 589 + 2; /* length of JPEG header + EOI marker */
158
159 cam->nbuffers = count;
160 while (cam->nbuffers > 0) {
161 if ((buff = vmalloc_32_user(cam->nbuffers *
162 PAGE_ALIGN(imagesize))))
163 break;
164 cam->nbuffers--;
165 }
166
167 for (i = 0; i < cam->nbuffers; i++) {
168 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
169 cam->frame[i].buf.index = i;
170 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
171 cam->frame[i].buf.length = imagesize;
172 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
173 cam->frame[i].buf.sequence = 0;
174 cam->frame[i].buf.field = V4L2_FIELD_NONE;
175 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
176 cam->frame[i].buf.flags = 0;
177 }
178
179 return cam->nbuffers;
180 }
181
182
183 static void sn9c102_release_buffers(struct sn9c102_device* cam)
184 {
185 if (cam->nbuffers) {
186 vfree(cam->frame[0].bufmem);
187 cam->nbuffers = 0;
188 }
189 cam->frame_current = NULL;
190 }
191
192
193 static void sn9c102_empty_framequeues(struct sn9c102_device* cam)
194 {
195 u32 i;
196
197 INIT_LIST_HEAD(&cam->inqueue);
198 INIT_LIST_HEAD(&cam->outqueue);
199
200 for (i = 0; i < SN9C102_MAX_FRAMES; i++) {
201 cam->frame[i].state = F_UNUSED;
202 cam->frame[i].buf.bytesused = 0;
203 }
204 }
205
206
207 static void sn9c102_requeue_outqueue(struct sn9c102_device* cam)
208 {
209 struct sn9c102_frame_t *i;
210
211 list_for_each_entry(i, &cam->outqueue, frame) {
212 i->state = F_QUEUED;
213 list_add(&i->frame, &cam->inqueue);
214 }
215
216 INIT_LIST_HEAD(&cam->outqueue);
217 }
218
219
220 static void sn9c102_queue_unusedframes(struct sn9c102_device* cam)
221 {
222 unsigned long lock_flags;
223 u32 i;
224
225 for (i = 0; i < cam->nbuffers; i++)
226 if (cam->frame[i].state == F_UNUSED) {
227 cam->frame[i].state = F_QUEUED;
228 spin_lock_irqsave(&cam->queue_lock, lock_flags);
229 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
230 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
231 }
232 }
233
234 /*****************************************************************************/
235
236 /*
237 Write a sequence of count value/register pairs. Returns -1 after the first
238 failed write, or 0 for no errors.
239 */
240 int sn9c102_write_regs(struct sn9c102_device* cam, const u8 valreg[][2],
241 int count)
242 {
243 struct usb_device* udev = cam->usbdev;
244 u8* buff = cam->control_buffer;
245 int i, res;
246
247 for (i = 0; i < count; i++) {
248 u8 index = valreg[i][1];
249
250 /*
251 index is a u8, so it must be <256 and can't be out of range.
252 If we put in a check anyway, gcc annoys us with a warning
253 hat our check is useless. People get all uppity when they
254 see warnings in the kernel compile.
255 */
256
257 *buff = valreg[i][0];
258
259 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08,
260 0x41, index, 0, buff, 1,
261 SN9C102_CTRL_TIMEOUT);
262
263 if (res < 0) {
264 DBG(3, "Failed to write a register (value 0x%02X, "
265 "index 0x%02X, error %d)", *buff, index, res);
266 return -1;
267 }
268
269 cam->reg[index] = *buff;
270 }
271
272 return 0;
273 }
274
275
276 int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index)
277 {
278 struct usb_device* udev = cam->usbdev;
279 u8* buff = cam->control_buffer;
280 int res;
281
282 if (index >= ARRAY_SIZE(cam->reg))
283 return -1;
284
285 *buff = value;
286
287 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
288 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
289 if (res < 0) {
290 DBG(3, "Failed to write a register (value 0x%02X, index "
291 "0x%02X, error %d)", value, index, res);
292 return -1;
293 }
294
295 cam->reg[index] = value;
296
297 return 0;
298 }
299
300
301 /* NOTE: with the SN9C10[123] reading some registers always returns 0 */
302 int sn9c102_read_reg(struct sn9c102_device* cam, u16 index)
303 {
304 struct usb_device* udev = cam->usbdev;
305 u8* buff = cam->control_buffer;
306 int res;
307
308 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
309 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
310 if (res < 0)
311 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
312 index, res);
313
314 return (res >= 0) ? (int)(*buff) : -1;
315 }
316
317
318 int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index)
319 {
320 if (index >= ARRAY_SIZE(cam->reg))
321 return -1;
322
323 return cam->reg[index];
324 }
325
326
327 static int
328 sn9c102_i2c_wait(struct sn9c102_device* cam,
329 const struct sn9c102_sensor* sensor)
330 {
331 int i, r;
332
333 for (i = 1; i <= 5; i++) {
334 r = sn9c102_read_reg(cam, 0x08);
335 if (r < 0)
336 return -EIO;
337 if (r & 0x04)
338 return 0;
339 if (sensor->frequency & SN9C102_I2C_400KHZ)
340 udelay(5*16);
341 else
342 udelay(16*16);
343 }
344 return -EBUSY;
345 }
346
347
348 static int
349 sn9c102_i2c_detect_read_error(struct sn9c102_device* cam,
350 const struct sn9c102_sensor* sensor)
351 {
352 int r , err = 0;
353
354 r = sn9c102_read_reg(cam, 0x08);
355 if (r < 0)
356 err += r;
357
358 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
359 if (!(r & 0x08))
360 err += -1;
361 } else {
362 if (r & 0x08)
363 err += -1;
364 }
365
366 return err ? -EIO : 0;
367 }
368
369
370 static int
371 sn9c102_i2c_detect_write_error(struct sn9c102_device* cam,
372 const struct sn9c102_sensor* sensor)
373 {
374 int r;
375 r = sn9c102_read_reg(cam, 0x08);
376 return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0;
377 }
378
379
380 int
381 sn9c102_i2c_try_raw_read(struct sn9c102_device* cam,
382 const struct sn9c102_sensor* sensor, u8 data0,
383 u8 data1, u8 n, u8 buffer[])
384 {
385 struct usb_device* udev = cam->usbdev;
386 u8* data = cam->control_buffer;
387 int i = 0, err = 0, res;
388
389 /* Write cycle */
390 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
391 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10;
392 data[1] = data0; /* I2C slave id */
393 data[2] = data1; /* address */
394 data[7] = 0x10;
395 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
396 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
397 if (res < 0)
398 err += res;
399
400 err += sn9c102_i2c_wait(cam, sensor);
401
402 /* Read cycle - n bytes */
403 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
404 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) |
405 (n << 4) | 0x02;
406 data[1] = data0;
407 data[7] = 0x10;
408 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
409 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
410 if (res < 0)
411 err += res;
412
413 err += sn9c102_i2c_wait(cam, sensor);
414
415 /* The first read byte will be placed in data[4] */
416 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
417 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT);
418 if (res < 0)
419 err += res;
420
421 err += sn9c102_i2c_detect_read_error(cam, sensor);
422
423 PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1,
424 data[4]);
425
426 if (err) {
427 DBG(3, "I2C read failed for %s image sensor", sensor->name);
428 return -1;
429 }
430
431 if (buffer)
432 for (i = 0; i < n && i < 5; i++)
433 buffer[n-i-1] = data[4-i];
434
435 return (int)data[4];
436 }
437
438
439 int
440 sn9c102_i2c_try_raw_write(struct sn9c102_device* cam,
441 const struct sn9c102_sensor* sensor, u8 n, u8 data0,
442 u8 data1, u8 data2, u8 data3, u8 data4, u8 data5)
443 {
444 struct usb_device* udev = cam->usbdev;
445 u8* data = cam->control_buffer;
446 int err = 0, res;
447
448 /* Write cycle. It usually is address + value */
449 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
450 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0)
451 | ((n - 1) << 4);
452 data[1] = data0;
453 data[2] = data1;
454 data[3] = data2;
455 data[4] = data3;
456 data[5] = data4;
457 data[6] = data5;
458 data[7] = 0x17;
459 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
460 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
461 if (res < 0)
462 err += res;
463
464 err += sn9c102_i2c_wait(cam, sensor);
465 err += sn9c102_i2c_detect_write_error(cam, sensor);
466
467 if (err)
468 DBG(3, "I2C write failed for %s image sensor", sensor->name);
469
470 PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, "
471 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X",
472 n, data0, data1, data2, data3, data4, data5);
473
474 return err ? -1 : 0;
475 }
476
477
478 int
479 sn9c102_i2c_try_read(struct sn9c102_device* cam,
480 const struct sn9c102_sensor* sensor, u8 address)
481 {
482 return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id,
483 address, 1, NULL);
484 }
485
486
487 static int sn9c102_i2c_try_write(struct sn9c102_device* cam,
488 const struct sn9c102_sensor* sensor,
489 u8 address, u8 value)
490 {
491 return sn9c102_i2c_try_raw_write(cam, sensor, 3,
492 sensor->i2c_slave_id, address,
493 value, 0, 0, 0);
494 }
495
496
497 int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address)
498 {
499 return sn9c102_i2c_try_read(cam, &cam->sensor, address);
500 }
501
502
503 int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value)
504 {
505 return sn9c102_i2c_try_write(cam, &cam->sensor, address, value);
506 }
507
508 /*****************************************************************************/
509
510 static size_t sn9c102_sof_length(struct sn9c102_device* cam)
511 {
512 switch (cam->bridge) {
513 case BRIDGE_SN9C101:
514 case BRIDGE_SN9C102:
515 return 12;
516 case BRIDGE_SN9C103:
517 return 18;
518 case BRIDGE_SN9C105:
519 case BRIDGE_SN9C120:
520 return 62;
521 }
522
523 return 0;
524 }
525
526
527 static void*
528 sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len)
529 {
530 static const char marker[6] = {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96};
531 const char *m = mem;
532 size_t soflen = 0, i, j;
533
534 soflen = sn9c102_sof_length(cam);
535
536 for (i = 0; i < len; i++) {
537 size_t b;
538
539 /* Read the variable part of the header */
540 if (unlikely(cam->sof.bytesread >= sizeof(marker))) {
541 cam->sof.header[cam->sof.bytesread] = *(m+i);
542 if (++cam->sof.bytesread == soflen) {
543 cam->sof.bytesread = 0;
544 return mem + i;
545 }
546 continue;
547 }
548
549 /* Search for the SOF marker (fixed part) in the header */
550 for (j = 0, b=cam->sof.bytesread; j+b < sizeof(marker); j++) {
551 if (unlikely(i+j == len))
552 return NULL;
553 if (*(m+i+j) == marker[cam->sof.bytesread]) {
554 cam->sof.header[cam->sof.bytesread] = *(m+i+j);
555 if (++cam->sof.bytesread == sizeof(marker)) {
556 PDBGG("Bytes to analyze: %zd. SOF "
557 "starts at byte #%zd", len, i);
558 i += j+1;
559 break;
560 }
561 } else {
562 cam->sof.bytesread = 0;
563 break;
564 }
565 }
566 }
567
568 return NULL;
569 }
570
571
572 static void*
573 sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len)
574 {
575 static const u8 eof_header[4][4] = {
576 {0x00, 0x00, 0x00, 0x00},
577 {0x40, 0x00, 0x00, 0x00},
578 {0x80, 0x00, 0x00, 0x00},
579 {0xc0, 0x00, 0x00, 0x00},
580 };
581 size_t i, j;
582
583 /* The EOF header does not exist in compressed data */
584 if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
585 cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
586 return NULL;
587
588 /*
589 The EOF header might cross the packet boundary, but this is not a
590 problem, since the end of a frame is determined by checking its size
591 in the first place.
592 */
593 for (i = 0; (len >= 4) && (i <= len - 4); i++)
594 for (j = 0; j < ARRAY_SIZE(eof_header); j++)
595 if (!memcmp(mem + i, eof_header[j], 4))
596 return mem + i;
597
598 return NULL;
599 }
600
601
602 static void
603 sn9c102_write_jpegheader(struct sn9c102_device* cam, struct sn9c102_frame_t* f)
604 {
605 static const u8 jpeg_header[589] = {
606 0xff, 0xd8, 0xff, 0xdb, 0x00, 0x84, 0x00, 0x06, 0x04, 0x05,
607 0x06, 0x05, 0x04, 0x06, 0x06, 0x05, 0x06, 0x07, 0x07, 0x06,
608 0x08, 0x0a, 0x10, 0x0a, 0x0a, 0x09, 0x09, 0x0a, 0x14, 0x0e,
609 0x0f, 0x0c, 0x10, 0x17, 0x14, 0x18, 0x18, 0x17, 0x14, 0x16,
610 0x16, 0x1a, 0x1d, 0x25, 0x1f, 0x1a, 0x1b, 0x23, 0x1c, 0x16,
611 0x16, 0x20, 0x2c, 0x20, 0x23, 0x26, 0x27, 0x29, 0x2a, 0x29,
612 0x19, 0x1f, 0x2d, 0x30, 0x2d, 0x28, 0x30, 0x25, 0x28, 0x29,
613 0x28, 0x01, 0x07, 0x07, 0x07, 0x0a, 0x08, 0x0a, 0x13, 0x0a,
614 0x0a, 0x13, 0x28, 0x1a, 0x16, 0x1a, 0x28, 0x28, 0x28, 0x28,
615 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
616 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
617 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
618 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
619 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0xff, 0xc4, 0x01, 0xa2,
620 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
621 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02,
622 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x01,
623 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
624 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
625 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x10, 0x00,
626 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04,
627 0x04, 0x00, 0x00, 0x01, 0x7d, 0x01, 0x02, 0x03, 0x00, 0x04,
628 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61,
629 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23,
630 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62,
631 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25,
632 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38,
633 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
634 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
635 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
636 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
637 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
638 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa,
639 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,
640 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3,
641 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3,
642 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3,
643 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0x11, 0x00, 0x02,
644 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04,
645 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04,
646 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
647 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1,
648 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1,
649 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19,
650 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
651 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
652 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
653 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
654 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
655 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
656 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9,
657 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba,
658 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
659 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3,
660 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4,
661 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xff, 0xc0, 0x00, 0x11,
662 0x08, 0x01, 0xe0, 0x02, 0x80, 0x03, 0x01, 0x21, 0x00, 0x02,
663 0x11, 0x01, 0x03, 0x11, 0x01, 0xff, 0xda, 0x00, 0x0c, 0x03,
664 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00
665 };
666 u8 *pos = f->bufmem;
667
668 memcpy(pos, jpeg_header, sizeof(jpeg_header));
669 *(pos + 6) = 0x00;
670 *(pos + 7 + 64) = 0x01;
671 if (cam->compression.quality == 0) {
672 memcpy(pos + 7, SN9C102_Y_QTABLE0, 64);
673 memcpy(pos + 8 + 64, SN9C102_UV_QTABLE0, 64);
674 } else if (cam->compression.quality == 1) {
675 memcpy(pos + 7, SN9C102_Y_QTABLE1, 64);
676 memcpy(pos + 8 + 64, SN9C102_UV_QTABLE1, 64);
677 }
678 *(pos + 564) = cam->sensor.pix_format.width & 0xFF;
679 *(pos + 563) = (cam->sensor.pix_format.width >> 8) & 0xFF;
680 *(pos + 562) = cam->sensor.pix_format.height & 0xFF;
681 *(pos + 561) = (cam->sensor.pix_format.height >> 8) & 0xFF;
682 *(pos + 567) = 0x21;
683
684 f->buf.bytesused += sizeof(jpeg_header);
685 }
686
687
688 static void sn9c102_urb_complete(struct urb *urb)
689 {
690 struct sn9c102_device* cam = urb->context;
691 struct sn9c102_frame_t** f;
692 size_t imagesize, soflen;
693 u8 i;
694 int err = 0;
695
696 if (urb->status == -ENOENT)
697 return;
698
699 f = &cam->frame_current;
700
701 if (cam->stream == STREAM_INTERRUPT) {
702 cam->stream = STREAM_OFF;
703 if ((*f))
704 (*f)->state = F_QUEUED;
705 cam->sof.bytesread = 0;
706 DBG(3, "Stream interrupted by application");
707 wake_up(&cam->wait_stream);
708 }
709
710 if (cam->state & DEV_DISCONNECTED)
711 return;
712
713 if (cam->state & DEV_MISCONFIGURED) {
714 wake_up_interruptible(&cam->wait_frame);
715 return;
716 }
717
718 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
719 goto resubmit_urb;
720
721 if (!(*f))
722 (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t,
723 frame);
724
725 imagesize = (cam->sensor.pix_format.width *
726 cam->sensor.pix_format.height *
727 cam->sensor.pix_format.priv) / 8;
728 if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
729 imagesize += 589; /* length of jpeg header */
730 soflen = sn9c102_sof_length(cam);
731
732 for (i = 0; i < urb->number_of_packets; i++) {
733 unsigned int img, len, status;
734 void *pos, *sof, *eof;
735
736 len = urb->iso_frame_desc[i].actual_length;
737 status = urb->iso_frame_desc[i].status;
738 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
739
740 if (status) {
741 DBG(3, "Error in isochronous frame");
742 (*f)->state = F_ERROR;
743 cam->sof.bytesread = 0;
744 continue;
745 }
746
747 PDBGG("Isochrnous frame: length %u, #%u i", len, i);
748
749 redo:
750 sof = sn9c102_find_sof_header(cam, pos, len);
751 if (likely(!sof)) {
752 eof = sn9c102_find_eof_header(cam, pos, len);
753 if ((*f)->state == F_GRABBING) {
754 end_of_frame:
755 img = len;
756
757 if (eof)
758 img = (eof > pos) ? eof - pos - 1 : 0;
759
760 if ((*f)->buf.bytesused + img > imagesize) {
761 u32 b;
762 b = (*f)->buf.bytesused + img -
763 imagesize;
764 img = imagesize - (*f)->buf.bytesused;
765 PDBGG("Expected EOF not found: video "
766 "frame cut");
767 if (eof)
768 DBG(3, "Exceeded limit: +%u "
769 "bytes", (unsigned)(b));
770 }
771
772 memcpy((*f)->bufmem + (*f)->buf.bytesused, pos,
773 img);
774
775 if ((*f)->buf.bytesused == 0)
776 do_gettimeofday(&(*f)->buf.timestamp);
777
778 (*f)->buf.bytesused += img;
779
780 if ((*f)->buf.bytesused == imagesize ||
781 ((cam->sensor.pix_format.pixelformat ==
782 V4L2_PIX_FMT_SN9C10X ||
783 cam->sensor.pix_format.pixelformat ==
784 V4L2_PIX_FMT_JPEG) && eof)) {
785 u32 b;
786
787 b = (*f)->buf.bytesused;
788 (*f)->state = F_DONE;
789 (*f)->buf.sequence= ++cam->frame_count;
790
791 spin_lock(&cam->queue_lock);
792 list_move_tail(&(*f)->frame,
793 &cam->outqueue);
794 if (!list_empty(&cam->inqueue))
795 (*f) = list_entry(
796 cam->inqueue.next,
797 struct sn9c102_frame_t,
798 frame );
799 else
800 (*f) = NULL;
801 spin_unlock(&cam->queue_lock);
802
803 memcpy(cam->sysfs.frame_header,
804 cam->sof.header, soflen);
805
806 DBG(3, "Video frame captured: %lu "
807 "bytes", (unsigned long)(b));
808
809 if (!(*f))
810 goto resubmit_urb;
811
812 } else if (eof) {
813 (*f)->state = F_ERROR;
814 DBG(3, "Not expected EOF after %lu "
815 "bytes of image data",
816 (unsigned long)
817 ((*f)->buf.bytesused));
818 }
819
820 if (sof) /* (1) */
821 goto start_of_frame;
822
823 } else if (eof) {
824 DBG(3, "EOF without SOF");
825 continue;
826
827 } else {
828 PDBGG("Ignoring pointless isochronous frame");
829 continue;
830 }
831
832 } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) {
833 start_of_frame:
834 (*f)->state = F_GRABBING;
835 (*f)->buf.bytesused = 0;
836 len -= (sof - pos);
837 pos = sof;
838 if (cam->sensor.pix_format.pixelformat ==
839 V4L2_PIX_FMT_JPEG)
840 sn9c102_write_jpegheader(cam, (*f));
841 DBG(3, "SOF detected: new video frame");
842 if (len)
843 goto redo;
844
845 } else if ((*f)->state == F_GRABBING) {
846 eof = sn9c102_find_eof_header(cam, pos, len);
847 if (eof && eof < sof)
848 goto end_of_frame; /* (1) */
849 else {
850 if (cam->sensor.pix_format.pixelformat ==
851 V4L2_PIX_FMT_SN9C10X ||
852 cam->sensor.pix_format.pixelformat ==
853 V4L2_PIX_FMT_JPEG) {
854 if (sof - pos >= soflen) {
855 eof = sof - soflen;
856 } else { /* remove header */
857 eof = pos;
858 (*f)->buf.bytesused -=
859 (soflen - (sof - pos));
860 }
861 goto end_of_frame;
862 } else {
863 DBG(3, "SOF before expected EOF after "
864 "%lu bytes of image data",
865 (unsigned long)
866 ((*f)->buf.bytesused));
867 goto start_of_frame;
868 }
869 }
870 }
871 }
872
873 resubmit_urb:
874 urb->dev = cam->usbdev;
875 err = usb_submit_urb(urb, GFP_ATOMIC);
876 if (err < 0 && err != -EPERM) {
877 cam->state |= DEV_MISCONFIGURED;
878 DBG(1, "usb_submit_urb() failed");
879 }
880
881 wake_up_interruptible(&cam->wait_frame);
882 }
883
884
885 static int sn9c102_start_transfer(struct sn9c102_device* cam)
886 {
887 struct usb_device *udev = cam->usbdev;
888 struct urb* urb;
889 struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
890 usb_ifnum_to_if(udev, 0),
891 SN9C102_ALTERNATE_SETTING);
892 const unsigned int psz = le16_to_cpu(altsetting->
893 endpoint[0].desc.wMaxPacketSize);
894 s8 i, j;
895 int err = 0;
896
897 for (i = 0; i < SN9C102_URBS; i++) {
898 cam->transfer_buffer[i] = kzalloc(SN9C102_ISO_PACKETS * psz,
899 GFP_KERNEL);
900 if (!cam->transfer_buffer[i]) {
901 err = -ENOMEM;
902 DBG(1, "Not enough memory");
903 goto free_buffers;
904 }
905 }
906
907 for (i = 0; i < SN9C102_URBS; i++) {
908 urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL);
909 cam->urb[i] = urb;
910 if (!urb) {
911 err = -ENOMEM;
912 DBG(1, "usb_alloc_urb() failed");
913 goto free_urbs;
914 }
915 urb->dev = udev;
916 urb->context = cam;
917 urb->pipe = usb_rcvisocpipe(udev, 1);
918 urb->transfer_flags = URB_ISO_ASAP;
919 urb->number_of_packets = SN9C102_ISO_PACKETS;
920 urb->complete = sn9c102_urb_complete;
921 urb->transfer_buffer = cam->transfer_buffer[i];
922 urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS;
923 urb->interval = 1;
924 for (j = 0; j < SN9C102_ISO_PACKETS; j++) {
925 urb->iso_frame_desc[j].offset = psz * j;
926 urb->iso_frame_desc[j].length = psz;
927 }
928 }
929
930 /* Enable video */
931 if (!(cam->reg[0x01] & 0x04)) {
932 err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01);
933 if (err) {
934 err = -EIO;
935 DBG(1, "I/O hardware error");
936 goto free_urbs;
937 }
938 }
939
940 err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING);
941 if (err) {
942 DBG(1, "usb_set_interface() failed");
943 goto free_urbs;
944 }
945
946 cam->frame_current = NULL;
947 cam->sof.bytesread = 0;
948
949 for (i = 0; i < SN9C102_URBS; i++) {
950 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
951 if (err) {
952 for (j = i-1; j >= 0; j--)
953 usb_kill_urb(cam->urb[j]);
954 DBG(1, "usb_submit_urb() failed, error %d", err);
955 goto free_urbs;
956 }
957 }
958
959 return 0;
960
961 free_urbs:
962 for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++)
963 usb_free_urb(cam->urb[i]);
964
965 free_buffers:
966 for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++)
967 kfree(cam->transfer_buffer[i]);
968
969 return err;
970 }
971
972
973 static int sn9c102_stop_transfer(struct sn9c102_device* cam)
974 {
975 struct usb_device *udev = cam->usbdev;
976 s8 i;
977 int err = 0;
978
979 if (cam->state & DEV_DISCONNECTED)
980 return 0;
981
982 for (i = SN9C102_URBS-1; i >= 0; i--) {
983 usb_kill_urb(cam->urb[i]);
984 usb_free_urb(cam->urb[i]);
985 kfree(cam->transfer_buffer[i]);
986 }
987
988 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
989 if (err)
990 DBG(3, "usb_set_interface() failed");
991
992 return err;
993 }
994
995
996 static int sn9c102_stream_interrupt(struct sn9c102_device* cam)
997 {
998 long timeout;
999
1000 cam->stream = STREAM_INTERRUPT;
1001 timeout = wait_event_timeout(cam->wait_stream,
1002 (cam->stream == STREAM_OFF) ||
1003 (cam->state & DEV_DISCONNECTED),
1004 SN9C102_URB_TIMEOUT);
1005 if (cam->state & DEV_DISCONNECTED)
1006 return -ENODEV;
1007 else if (cam->stream != STREAM_OFF) {
1008 cam->state |= DEV_MISCONFIGURED;
1009 DBG(1, "URB timeout reached. The camera is misconfigured. "
1010 "To use it, close and open /dev/video%d again.",
1011 cam->v4ldev->num);
1012 return -EIO;
1013 }
1014
1015 return 0;
1016 }
1017
1018 /*****************************************************************************/
1019
1020 #ifdef CONFIG_VIDEO_ADV_DEBUG
1021 static u16 sn9c102_strtou16(const char* buff, size_t len, ssize_t* count)
1022 {
1023 char str[7];
1024 char* endp;
1025 unsigned long val;
1026
1027 if (len < 6) {
1028 strncpy(str, buff, len);
1029 str[len] = '\0';
1030 } else {
1031 strncpy(str, buff, 6);
1032 str[6] = '\0';
1033 }
1034
1035 val = simple_strtoul(str, &endp, 0);
1036
1037 *count = 0;
1038 if (val <= 0xffff)
1039 *count = (ssize_t)(endp - str);
1040 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
1041 *count += 1;
1042
1043 return (u16)val;
1044 }
1045
1046 /*
1047 NOTE 1: being inside one of the following methods implies that the v4l
1048 device exists for sure (see kobjects and reference counters)
1049 NOTE 2: buffers are PAGE_SIZE long
1050 */
1051
1052 static ssize_t sn9c102_show_reg(struct device* cd,
1053 struct device_attribute *attr, char* buf)
1054 {
1055 struct sn9c102_device* cam;
1056 ssize_t count;
1057
1058 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1059 return -ERESTARTSYS;
1060
1061 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1062 if (!cam) {
1063 mutex_unlock(&sn9c102_sysfs_lock);
1064 return -ENODEV;
1065 }
1066
1067 count = sprintf(buf, "%u\n", cam->sysfs.reg);
1068
1069 mutex_unlock(&sn9c102_sysfs_lock);
1070
1071 return count;
1072 }
1073
1074
1075 static ssize_t
1076 sn9c102_store_reg(struct device* cd, struct device_attribute *attr,
1077 const char* buf, size_t len)
1078 {
1079 struct sn9c102_device* cam;
1080 u16 index;
1081 ssize_t count;
1082
1083 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1084 return -ERESTARTSYS;
1085
1086 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1087 if (!cam) {
1088 mutex_unlock(&sn9c102_sysfs_lock);
1089 return -ENODEV;
1090 }
1091
1092 index = sn9c102_strtou16(buf, len, &count);
1093 if (index >= ARRAY_SIZE(cam->reg) || !count) {
1094 mutex_unlock(&sn9c102_sysfs_lock);
1095 return -EINVAL;
1096 }
1097
1098 cam->sysfs.reg = index;
1099
1100 DBG(2, "Moved SN9C1XX register index to 0x%02X", cam->sysfs.reg);
1101 DBG(3, "Written bytes: %zd", count);
1102
1103 mutex_unlock(&sn9c102_sysfs_lock);
1104
1105 return count;
1106 }
1107
1108
1109 static ssize_t sn9c102_show_val(struct device* cd,
1110 struct device_attribute *attr, char* buf)
1111 {
1112 struct sn9c102_device* cam;
1113 ssize_t count;
1114 int val;
1115
1116 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1117 return -ERESTARTSYS;
1118
1119 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1120 if (!cam) {
1121 mutex_unlock(&sn9c102_sysfs_lock);
1122 return -ENODEV;
1123 }
1124
1125 if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) {
1126 mutex_unlock(&sn9c102_sysfs_lock);
1127 return -EIO;
1128 }
1129
1130 count = sprintf(buf, "%d\n", val);
1131
1132 DBG(3, "Read bytes: %zd, value: %d", count, val);
1133
1134 mutex_unlock(&sn9c102_sysfs_lock);
1135
1136 return count;
1137 }
1138
1139
1140 static ssize_t
1141 sn9c102_store_val(struct device* cd, struct device_attribute *attr,
1142 const char* buf, size_t len)
1143 {
1144 struct sn9c102_device* cam;
1145 u16 value;
1146 ssize_t count;
1147 int err;
1148
1149 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1150 return -ERESTARTSYS;
1151
1152 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1153 if (!cam) {
1154 mutex_unlock(&sn9c102_sysfs_lock);
1155 return -ENODEV;
1156 }
1157
1158 value = sn9c102_strtou16(buf, len, &count);
1159 if (!count) {
1160 mutex_unlock(&sn9c102_sysfs_lock);
1161 return -EINVAL;
1162 }
1163
1164 err = sn9c102_write_reg(cam, value, cam->sysfs.reg);
1165 if (err) {
1166 mutex_unlock(&sn9c102_sysfs_lock);
1167 return -EIO;
1168 }
1169
1170 DBG(2, "Written SN9C1XX reg. 0x%02X, val. 0x%02X",
1171 cam->sysfs.reg, value);
1172 DBG(3, "Written bytes: %zd", count);
1173
1174 mutex_unlock(&sn9c102_sysfs_lock);
1175
1176 return count;
1177 }
1178
1179
1180 static ssize_t sn9c102_show_i2c_reg(struct device* cd,
1181 struct device_attribute *attr, char* buf)
1182 {
1183 struct sn9c102_device* cam;
1184 ssize_t count;
1185
1186 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1187 return -ERESTARTSYS;
1188
1189 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1190 if (!cam) {
1191 mutex_unlock(&sn9c102_sysfs_lock);
1192 return -ENODEV;
1193 }
1194
1195 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
1196
1197 DBG(3, "Read bytes: %zd", count);
1198
1199 mutex_unlock(&sn9c102_sysfs_lock);
1200
1201 return count;
1202 }
1203
1204
1205 static ssize_t
1206 sn9c102_store_i2c_reg(struct device* cd, struct device_attribute *attr,
1207 const char* buf, size_t len)
1208 {
1209 struct sn9c102_device* cam;
1210 u16 index;
1211 ssize_t count;
1212
1213 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1214 return -ERESTARTSYS;
1215
1216 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1217 if (!cam) {
1218 mutex_unlock(&sn9c102_sysfs_lock);
1219 return -ENODEV;
1220 }
1221
1222 index = sn9c102_strtou16(buf, len, &count);
1223 if (!count) {
1224 mutex_unlock(&sn9c102_sysfs_lock);
1225 return -EINVAL;
1226 }
1227
1228 cam->sysfs.i2c_reg = index;
1229
1230 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
1231 DBG(3, "Written bytes: %zd", count);
1232
1233 mutex_unlock(&sn9c102_sysfs_lock);
1234
1235 return count;
1236 }
1237
1238
1239 static ssize_t sn9c102_show_i2c_val(struct device* cd,
1240 struct device_attribute *attr, char* buf)
1241 {
1242 struct sn9c102_device* cam;
1243 ssize_t count;
1244 int val;
1245
1246 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1247 return -ERESTARTSYS;
1248
1249 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1250 if (!cam) {
1251 mutex_unlock(&sn9c102_sysfs_lock);
1252 return -ENODEV;
1253 }
1254
1255 if (!(cam->sensor.sysfs_ops & SN9C102_I2C_READ)) {
1256 mutex_unlock(&sn9c102_sysfs_lock);
1257 return -ENOSYS;
1258 }
1259
1260 if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
1261 mutex_unlock(&sn9c102_sysfs_lock);
1262 return -EIO;
1263 }
1264
1265 count = sprintf(buf, "%d\n", val);
1266
1267 DBG(3, "Read bytes: %zd, value: %d", count, val);
1268
1269 mutex_unlock(&sn9c102_sysfs_lock);
1270
1271 return count;
1272 }
1273
1274
1275 static ssize_t
1276 sn9c102_store_i2c_val(struct device* cd, struct device_attribute *attr,
1277 const char* buf, size_t len)
1278 {
1279 struct sn9c102_device* cam;
1280 u16 value;
1281 ssize_t count;
1282 int err;
1283
1284 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1285 return -ERESTARTSYS;
1286
1287 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1288 if (!cam) {
1289 mutex_unlock(&sn9c102_sysfs_lock);
1290 return -ENODEV;
1291 }
1292
1293 if (!(cam->sensor.sysfs_ops & SN9C102_I2C_WRITE)) {
1294 mutex_unlock(&sn9c102_sysfs_lock);
1295 return -ENOSYS;
1296 }
1297
1298 value = sn9c102_strtou16(buf, len, &count);
1299 if (!count) {
1300 mutex_unlock(&sn9c102_sysfs_lock);
1301 return -EINVAL;
1302 }
1303
1304 err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value);
1305 if (err) {
1306 mutex_unlock(&sn9c102_sysfs_lock);
1307 return -EIO;
1308 }
1309
1310 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
1311 cam->sysfs.i2c_reg, value);
1312 DBG(3, "Written bytes: %zd", count);
1313
1314 mutex_unlock(&sn9c102_sysfs_lock);
1315
1316 return count;
1317 }
1318
1319
1320 static ssize_t
1321 sn9c102_store_green(struct device* cd, struct device_attribute *attr,
1322 const char* buf, size_t len)
1323 {
1324 struct sn9c102_device* cam;
1325 enum sn9c102_bridge bridge;
1326 ssize_t res = 0;
1327 u16 value;
1328 ssize_t count;
1329
1330 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1331 return -ERESTARTSYS;
1332
1333 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1334 if (!cam) {
1335 mutex_unlock(&sn9c102_sysfs_lock);
1336 return -ENODEV;
1337 }
1338
1339 bridge = cam->bridge;
1340
1341 mutex_unlock(&sn9c102_sysfs_lock);
1342
1343 value = sn9c102_strtou16(buf, len, &count);
1344 if (!count)
1345 return -EINVAL;
1346
1347 switch (bridge) {
1348 case BRIDGE_SN9C101:
1349 case BRIDGE_SN9C102:
1350 if (value > 0x0f)
1351 return -EINVAL;
1352 if ((res = sn9c102_store_reg(cd, attr, "0x11", 4)) >= 0)
1353 res = sn9c102_store_val(cd, attr, buf, len);
1354 break;
1355 case BRIDGE_SN9C103:
1356 case BRIDGE_SN9C105:
1357 case BRIDGE_SN9C120:
1358 if (value > 0x7f)
1359 return -EINVAL;
1360 if ((res = sn9c102_store_reg(cd, attr, "0x07", 4)) >= 0)
1361 res = sn9c102_store_val(cd, attr, buf, len);
1362 break;
1363 }
1364
1365 return res;
1366 }
1367
1368
1369 static ssize_t
1370 sn9c102_store_blue(struct device* cd, struct device_attribute *attr,
1371 const char* buf, size_t len)
1372 {
1373 ssize_t res = 0;
1374 u16 value;
1375 ssize_t count;
1376
1377 value = sn9c102_strtou16(buf, len, &count);
1378 if (!count || value > 0x7f)
1379 return -EINVAL;
1380
1381 if ((res = sn9c102_store_reg(cd, attr, "0x06", 4)) >= 0)
1382 res = sn9c102_store_val(cd, attr, buf, len);
1383
1384 return res;
1385 }
1386
1387
1388 static ssize_t
1389 sn9c102_store_red(struct device* cd, struct device_attribute *attr,
1390 const char* buf, size_t len)
1391 {
1392 ssize_t res = 0;
1393 u16 value;
1394 ssize_t count;
1395
1396 value = sn9c102_strtou16(buf, len, &count);
1397 if (!count || value > 0x7f)
1398 return -EINVAL;
1399
1400 if ((res = sn9c102_store_reg(cd, attr, "0x05", 4)) >= 0)
1401 res = sn9c102_store_val(cd, attr, buf, len);
1402
1403 return res;
1404 }
1405
1406
1407 static ssize_t sn9c102_show_frame_header(struct device* cd,
1408 struct device_attribute *attr,
1409 char* buf)
1410 {
1411 struct sn9c102_device* cam;
1412 ssize_t count;
1413
1414 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1415 if (!cam)
1416 return -ENODEV;
1417
1418 count = sizeof(cam->sysfs.frame_header);
1419 memcpy(buf, cam->sysfs.frame_header, count);
1420
1421 DBG(3, "Frame header, read bytes: %zd", count);
1422
1423 return count;
1424 }
1425
1426
1427 static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, sn9c102_show_reg, sn9c102_store_reg);
1428 static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, sn9c102_show_val, sn9c102_store_val);
1429 static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
1430 sn9c102_show_i2c_reg, sn9c102_store_i2c_reg);
1431 static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
1432 sn9c102_show_i2c_val, sn9c102_store_i2c_val);
1433 static DEVICE_ATTR(green, S_IWUGO, NULL, sn9c102_store_green);
1434 static DEVICE_ATTR(blue, S_IWUGO, NULL, sn9c102_store_blue);
1435 static DEVICE_ATTR(red, S_IWUGO, NULL, sn9c102_store_red);
1436 static DEVICE_ATTR(frame_header, S_IRUGO, sn9c102_show_frame_header, NULL);
1437
1438
1439 static int sn9c102_create_sysfs(struct sn9c102_device* cam)
1440 {
1441 struct device *dev = &(cam->v4ldev->dev);
1442 int err = 0;
1443
1444 if ((err = device_create_file(dev, &dev_attr_reg)))
1445 goto err_out;
1446 if ((err = device_create_file(dev, &dev_attr_val)))
1447 goto err_reg;
1448 if ((err = device_create_file(dev, &dev_attr_frame_header)))
1449 goto err_val;
1450
1451 if (cam->sensor.sysfs_ops) {
1452 if ((err = device_create_file(dev, &dev_attr_i2c_reg)))
1453 goto err_frame_header;
1454 if ((err = device_create_file(dev, &dev_attr_i2c_val)))
1455 goto err_i2c_reg;
1456 }
1457
1458 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
1459 if ((err = device_create_file(dev, &dev_attr_green)))
1460 goto err_i2c_val;
1461 } else {
1462 if ((err = device_create_file(dev, &dev_attr_blue)))
1463 goto err_i2c_val;
1464 if ((err = device_create_file(dev, &dev_attr_red)))
1465 goto err_blue;
1466 }
1467
1468 return 0;
1469
1470 err_blue:
1471 device_remove_file(dev, &dev_attr_blue);
1472 err_i2c_val:
1473 if (cam->sensor.sysfs_ops)
1474 device_remove_file(dev, &dev_attr_i2c_val);
1475 err_i2c_reg:
1476 if (cam->sensor.sysfs_ops)
1477 device_remove_file(dev, &dev_attr_i2c_reg);
1478 err_frame_header:
1479 device_remove_file(dev, &dev_attr_frame_header);
1480 err_val:
1481 device_remove_file(dev, &dev_attr_val);
1482 err_reg:
1483 device_remove_file(dev, &dev_attr_reg);
1484 err_out:
1485 return err;
1486 }
1487 #endif /* CONFIG_VIDEO_ADV_DEBUG */
1488
1489 /*****************************************************************************/
1490
1491 static int
1492 sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix)
1493 {
1494 int err = 0;
1495
1496 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
1497 pix->pixelformat == V4L2_PIX_FMT_JPEG) {
1498 switch (cam->bridge) {
1499 case BRIDGE_SN9C101:
1500 case BRIDGE_SN9C102:
1501 case BRIDGE_SN9C103:
1502 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1503 0x18);
1504 break;
1505 case BRIDGE_SN9C105:
1506 case BRIDGE_SN9C120:
1507 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1508 0x18);
1509 break;
1510 }
1511 } else {
1512 switch (cam->bridge) {
1513 case BRIDGE_SN9C101:
1514 case BRIDGE_SN9C102:
1515 case BRIDGE_SN9C103:
1516 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1517 0x18);
1518 break;
1519 case BRIDGE_SN9C105:
1520 case BRIDGE_SN9C120:
1521 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1522 0x18);
1523 break;
1524 }
1525 }
1526
1527 return err ? -EIO : 0;
1528 }
1529
1530
1531 static int
1532 sn9c102_set_compression(struct sn9c102_device* cam,
1533 struct v4l2_jpegcompression* compression)
1534 {
1535 int i, err = 0;
1536
1537 switch (cam->bridge) {
1538 case BRIDGE_SN9C101:
1539 case BRIDGE_SN9C102:
1540 case BRIDGE_SN9C103:
1541 if (compression->quality == 0)
1542 err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01,
1543 0x17);
1544 else if (compression->quality == 1)
1545 err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe,
1546 0x17);
1547 break;
1548 case BRIDGE_SN9C105:
1549 case BRIDGE_SN9C120:
1550 if (compression->quality == 0) {
1551 for (i = 0; i <= 63; i++) {
1552 err += sn9c102_write_reg(cam,
1553 SN9C102_Y_QTABLE1[i],
1554 0x100 + i);
1555 err += sn9c102_write_reg(cam,
1556 SN9C102_UV_QTABLE1[i],
1557 0x140 + i);
1558 }
1559 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0xbf,
1560 0x18);
1561 } else if (compression->quality == 1) {
1562 for (i = 0; i <= 63; i++) {
1563 err += sn9c102_write_reg(cam,
1564 SN9C102_Y_QTABLE1[i],
1565 0x100 + i);
1566 err += sn9c102_write_reg(cam,
1567 SN9C102_UV_QTABLE1[i],
1568 0x140 + i);
1569 }
1570 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x40,
1571 0x18);
1572 }
1573 break;
1574 }
1575
1576 return err ? -EIO : 0;
1577 }
1578
1579
1580 static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale)
1581 {
1582 u8 r = 0;
1583 int err = 0;
1584
1585 if (scale == 1)
1586 r = cam->reg[0x18] & 0xcf;
1587 else if (scale == 2) {
1588 r = cam->reg[0x18] & 0xcf;
1589 r |= 0x10;
1590 } else if (scale == 4)
1591 r = cam->reg[0x18] | 0x20;
1592
1593 err += sn9c102_write_reg(cam, r, 0x18);
1594 if (err)
1595 return -EIO;
1596
1597 PDBGG("Scaling factor: %u", scale);
1598
1599 return 0;
1600 }
1601
1602
1603 static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect)
1604 {
1605 struct sn9c102_sensor* s = &cam->sensor;
1606 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left),
1607 v_start = (u8)(rect->top - s->cropcap.bounds.top),
1608 h_size = (u8)(rect->width / 16),
1609 v_size = (u8)(rect->height / 16);
1610 int err = 0;
1611
1612 err += sn9c102_write_reg(cam, h_start, 0x12);
1613 err += sn9c102_write_reg(cam, v_start, 0x13);
1614 err += sn9c102_write_reg(cam, h_size, 0x15);
1615 err += sn9c102_write_reg(cam, v_size, 0x16);
1616 if (err)
1617 return -EIO;
1618
1619 PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size "
1620 "%u %u %u %u", h_start, v_start, h_size, v_size);
1621
1622 return 0;
1623 }
1624
1625
1626 static int sn9c102_init(struct sn9c102_device* cam)
1627 {
1628 struct sn9c102_sensor* s = &cam->sensor;
1629 struct v4l2_control ctrl;
1630 struct v4l2_queryctrl *qctrl;
1631 struct v4l2_rect* rect;
1632 u8 i = 0;
1633 int err = 0;
1634
1635 if (!(cam->state & DEV_INITIALIZED)) {
1636 mutex_init(&cam->open_mutex);
1637 init_waitqueue_head(&cam->wait_open);
1638 qctrl = s->qctrl;
1639 rect = &(s->cropcap.defrect);
1640 } else { /* use current values */
1641 qctrl = s->_qctrl;
1642 rect = &(s->_rect);
1643 }
1644
1645 err += sn9c102_set_scale(cam, rect->width / s->pix_format.width);
1646 err += sn9c102_set_crop(cam, rect);
1647 if (err)
1648 return err;
1649
1650 if (s->init) {
1651 err = s->init(cam);
1652 if (err) {
1653 DBG(3, "Sensor initialization failed");
1654 return err;
1655 }
1656 }
1657
1658 if (!(cam->state & DEV_INITIALIZED))
1659 if (cam->bridge == BRIDGE_SN9C101 ||
1660 cam->bridge == BRIDGE_SN9C102 ||
1661 cam->bridge == BRIDGE_SN9C103) {
1662 if (s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1663 s->pix_format.pixelformat= V4L2_PIX_FMT_SBGGR8;
1664 cam->compression.quality = cam->reg[0x17] & 0x01 ?
1665 0 : 1;
1666 } else {
1667 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X)
1668 s->pix_format.pixelformat = V4L2_PIX_FMT_JPEG;
1669 cam->compression.quality = cam->reg[0x18] & 0x40 ?
1670 0 : 1;
1671 err += sn9c102_set_compression(cam, &cam->compression);
1672 }
1673 else
1674 err += sn9c102_set_compression(cam, &cam->compression);
1675 err += sn9c102_set_pix_format(cam, &s->pix_format);
1676 if (s->set_pix_format)
1677 err += s->set_pix_format(cam, &s->pix_format);
1678 if (err)
1679 return err;
1680
1681 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
1682 s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1683 DBG(3, "Compressed video format is active, quality %d",
1684 cam->compression.quality);
1685 else
1686 DBG(3, "Uncompressed video format is active");
1687
1688 if (s->set_crop)
1689 if ((err = s->set_crop(cam, rect))) {
1690 DBG(3, "set_crop() failed");
1691 return err;
1692 }
1693
1694 if (s->set_ctrl) {
1695 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1696 if (s->qctrl[i].id != 0 &&
1697 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1698 ctrl.id = s->qctrl[i].id;
1699 ctrl.value = qctrl[i].default_value;
1700 err = s->set_ctrl(cam, &ctrl);
1701 if (err) {
1702 DBG(3, "Set %s control failed",
1703 s->qctrl[i].name);
1704 return err;
1705 }
1706 DBG(3, "Image sensor supports '%s' control",
1707 s->qctrl[i].name);
1708 }
1709 }
1710
1711 if (!(cam->state & DEV_INITIALIZED)) {
1712 mutex_init(&cam->fileop_mutex);
1713 spin_lock_init(&cam->queue_lock);
1714 init_waitqueue_head(&cam->wait_frame);
1715 init_waitqueue_head(&cam->wait_stream);
1716 cam->nreadbuffers = 2;
1717 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1718 memcpy(&(s->_rect), &(s->cropcap.defrect),
1719 sizeof(struct v4l2_rect));
1720 cam->state |= DEV_INITIALIZED;
1721 }
1722
1723 DBG(2, "Initialization succeeded");
1724 return 0;
1725 }
1726
1727 /*****************************************************************************/
1728
1729 static void sn9c102_release_resources(struct kref *kref)
1730 {
1731 struct sn9c102_device *cam;
1732
1733 mutex_lock(&sn9c102_sysfs_lock);
1734
1735 cam = container_of(kref, struct sn9c102_device, kref);
1736
1737 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->num);
1738 video_set_drvdata(cam->v4ldev, NULL);
1739 video_unregister_device(cam->v4ldev);
1740 usb_put_dev(cam->usbdev);
1741 kfree(cam->control_buffer);
1742 kfree(cam);
1743
1744 mutex_unlock(&sn9c102_sysfs_lock);
1745
1746 }
1747
1748
1749 static int sn9c102_open(struct file *filp)
1750 {
1751 struct sn9c102_device* cam;
1752 int err = 0;
1753
1754 /*
1755 A read_trylock() in open() is the only safe way to prevent race
1756 conditions with disconnect(), one close() and multiple (not
1757 necessarily simultaneous) attempts to open(). For example, it
1758 prevents from waiting for a second access, while the device
1759 structure is being deallocated, after a possible disconnect() and
1760 during a following close() holding the write lock: given that, after
1761 this deallocation, no access will be possible anymore, using the
1762 non-trylock version would have let open() gain the access to the
1763 device structure improperly.
1764 For this reason the lock must also not be per-device.
1765 */
1766 if (!down_read_trylock(&sn9c102_dev_lock))
1767 return -ERESTARTSYS;
1768
1769 cam = video_drvdata(filp);
1770
1771 if (wait_for_completion_interruptible(&cam->probe)) {
1772 up_read(&sn9c102_dev_lock);
1773 return -ERESTARTSYS;
1774 }
1775
1776 kref_get(&cam->kref);
1777
1778 /*
1779 Make sure to isolate all the simultaneous opens.
1780 */
1781 if (mutex_lock_interruptible(&cam->open_mutex)) {
1782 kref_put(&cam->kref, sn9c102_release_resources);
1783 up_read(&sn9c102_dev_lock);
1784 return -ERESTARTSYS;
1785 }
1786
1787 if (cam->state & DEV_DISCONNECTED) {
1788 DBG(1, "Device not present");
1789 err = -ENODEV;
1790 goto out;
1791 }
1792
1793 if (cam->users) {
1794 DBG(2, "Device /dev/video%d is already in use",
1795 cam->v4ldev->num);
1796 DBG(3, "Simultaneous opens are not supported");
1797 /*
1798 open() must follow the open flags and should block
1799 eventually while the device is in use.
1800 */
1801 if ((filp->f_flags & O_NONBLOCK) ||
1802 (filp->f_flags & O_NDELAY)) {
1803 err = -EWOULDBLOCK;
1804 goto out;
1805 }
1806 DBG(2, "A blocking open() has been requested. Wait for the "
1807 "device to be released...");
1808 up_read(&sn9c102_dev_lock);
1809 /*
1810 We will not release the "open_mutex" lock, so that only one
1811 process can be in the wait queue below. This way the process
1812 will be sleeping while holding the lock, without loosing its
1813 priority after any wake_up().
1814 */
1815 err = wait_event_interruptible_exclusive(cam->wait_open,
1816 (cam->state & DEV_DISCONNECTED)
1817 || !cam->users);
1818 down_read(&sn9c102_dev_lock);
1819 if (err)
1820 goto out;
1821 if (cam->state & DEV_DISCONNECTED) {
1822 err = -ENODEV;
1823 goto out;
1824 }
1825 }
1826
1827 if (cam->state & DEV_MISCONFIGURED) {
1828 err = sn9c102_init(cam);
1829 if (err) {
1830 DBG(1, "Initialization failed again. "
1831 "I will retry on next open().");
1832 goto out;
1833 }
1834 cam->state &= ~DEV_MISCONFIGURED;
1835 }
1836
1837 if ((err = sn9c102_start_transfer(cam)))
1838 goto out;
1839
1840 filp->private_data = cam;
1841 cam->users++;
1842 cam->io = IO_NONE;
1843 cam->stream = STREAM_OFF;
1844 cam->nbuffers = 0;
1845 cam->frame_count = 0;
1846 sn9c102_empty_framequeues(cam);
1847
1848 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->num);
1849
1850 out:
1851 mutex_unlock(&cam->open_mutex);
1852 if (err)
1853 kref_put(&cam->kref, sn9c102_release_resources);
1854
1855 up_read(&sn9c102_dev_lock);
1856 return err;
1857 }
1858
1859
1860 static int sn9c102_release(struct file *filp)
1861 {
1862 struct sn9c102_device* cam;
1863
1864 down_write(&sn9c102_dev_lock);
1865
1866 cam = video_drvdata(filp);
1867
1868 sn9c102_stop_transfer(cam);
1869 sn9c102_release_buffers(cam);
1870 cam->users--;
1871 wake_up_interruptible_nr(&cam->wait_open, 1);
1872
1873 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->num);
1874
1875 kref_put(&cam->kref, sn9c102_release_resources);
1876
1877 up_write(&sn9c102_dev_lock);
1878
1879 return 0;
1880 }
1881
1882
1883 static ssize_t
1884 sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
1885 {
1886 struct sn9c102_device *cam = video_drvdata(filp);
1887 struct sn9c102_frame_t* f, * i;
1888 unsigned long lock_flags;
1889 long timeout;
1890 int err = 0;
1891
1892 if (mutex_lock_interruptible(&cam->fileop_mutex))
1893 return -ERESTARTSYS;
1894
1895 if (cam->state & DEV_DISCONNECTED) {
1896 DBG(1, "Device not present");
1897 mutex_unlock(&cam->fileop_mutex);
1898 return -ENODEV;
1899 }
1900
1901 if (cam->state & DEV_MISCONFIGURED) {
1902 DBG(1, "The camera is misconfigured. Close and open it "
1903 "again.");
1904 mutex_unlock(&cam->fileop_mutex);
1905 return -EIO;
1906 }
1907
1908 if (cam->io == IO_MMAP) {
1909 DBG(3, "Close and open the device again to choose "
1910 "the read method");
1911 mutex_unlock(&cam->fileop_mutex);
1912 return -EBUSY;
1913 }
1914
1915 if (cam->io == IO_NONE) {
1916 if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) {
1917 DBG(1, "read() failed, not enough memory");
1918 mutex_unlock(&cam->fileop_mutex);
1919 return -ENOMEM;
1920 }
1921 cam->io = IO_READ;
1922 cam->stream = STREAM_ON;
1923 }
1924
1925 if (list_empty(&cam->inqueue)) {
1926 if (!list_empty(&cam->outqueue))
1927 sn9c102_empty_framequeues(cam);
1928 sn9c102_queue_unusedframes(cam);
1929 }
1930
1931 if (!count) {
1932 mutex_unlock(&cam->fileop_mutex);
1933 return 0;
1934 }
1935
1936 if (list_empty(&cam->outqueue)) {
1937 if (filp->f_flags & O_NONBLOCK) {
1938 mutex_unlock(&cam->fileop_mutex);
1939 return -EAGAIN;
1940 }
1941 if (!cam->module_param.frame_timeout) {
1942 err = wait_event_interruptible
1943 ( cam->wait_frame,
1944 (!list_empty(&cam->outqueue)) ||
1945 (cam->state & DEV_DISCONNECTED) ||
1946 (cam->state & DEV_MISCONFIGURED) );
1947 if (err) {
1948 mutex_unlock(&cam->fileop_mutex);
1949 return err;
1950 }
1951 } else {
1952 timeout = wait_event_interruptible_timeout
1953 ( cam->wait_frame,
1954 (!list_empty(&cam->outqueue)) ||
1955 (cam->state & DEV_DISCONNECTED) ||
1956 (cam->state & DEV_MISCONFIGURED),
1957 msecs_to_jiffies(
1958 cam->module_param.frame_timeout * 1000
1959 )
1960 );
1961 if (timeout < 0) {
1962 mutex_unlock(&cam->fileop_mutex);
1963 return timeout;
1964 } else if (timeout == 0 &&
1965 !(cam->state & DEV_DISCONNECTED)) {
1966 DBG(1, "Video frame timeout elapsed");
1967 mutex_unlock(&cam->fileop_mutex);
1968 return -EIO;
1969 }
1970 }
1971 if (cam->state & DEV_DISCONNECTED) {
1972 mutex_unlock(&cam->fileop_mutex);
1973 return -ENODEV;
1974 }
1975 if (cam->state & DEV_MISCONFIGURED) {
1976 mutex_unlock(&cam->fileop_mutex);
1977 return -EIO;
1978 }
1979 }
1980
1981 f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame);
1982
1983 if (count > f->buf.bytesused)
1984 count = f->buf.bytesused;
1985
1986 if (copy_to_user(buf, f->bufmem, count)) {
1987 err = -EFAULT;
1988 goto exit;
1989 }
1990 *f_pos += count;
1991
1992 exit:
1993 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1994 list_for_each_entry(i, &cam->outqueue, frame)
1995 i->state = F_UNUSED;
1996 INIT_LIST_HEAD(&cam->outqueue);
1997 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1998
1999 sn9c102_queue_unusedframes(cam);
2000
2001 PDBGG("Frame #%lu, bytes read: %zu",
2002 (unsigned long)f->buf.index, count);
2003
2004 mutex_unlock(&cam->fileop_mutex);
2005
2006 return count;
2007 }
2008
2009
2010 static unsigned int sn9c102_poll(struct file *filp, poll_table *wait)
2011 {
2012 struct sn9c102_device *cam = video_drvdata(filp);
2013 struct sn9c102_frame_t* f;
2014 unsigned long lock_flags;
2015 unsigned int mask = 0;
2016
2017 if (mutex_lock_interruptible(&cam->fileop_mutex))
2018 return POLLERR;
2019
2020 if (cam->state & DEV_DISCONNECTED) {
2021 DBG(1, "Device not present");
2022 goto error;
2023 }
2024
2025 if (cam->state & DEV_MISCONFIGURED) {
2026 DBG(1, "The camera is misconfigured. Close and open it "
2027 "again.");
2028 goto error;
2029 }
2030
2031 if (cam->io == IO_NONE) {
2032 if (!sn9c102_request_buffers(cam, cam->nreadbuffers,
2033 IO_READ)) {
2034 DBG(1, "poll() failed, not enough memory");
2035 goto error;
2036 }
2037 cam->io = IO_READ;
2038 cam->stream = STREAM_ON;
2039 }
2040
2041 if (cam->io == IO_READ) {
2042 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2043 list_for_each_entry(f, &cam->outqueue, frame)
2044 f->state = F_UNUSED;
2045 INIT_LIST_HEAD(&cam->outqueue);
2046 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2047 sn9c102_queue_unusedframes(cam);
2048 }
2049
2050 poll_wait(filp, &cam->wait_frame, wait);
2051
2052 if (!list_empty(&cam->outqueue))
2053 mask |= POLLIN | POLLRDNORM;
2054
2055 mutex_unlock(&cam->fileop_mutex);
2056
2057 return mask;
2058
2059 error:
2060 mutex_unlock(&cam->fileop_mutex);
2061 return POLLERR;
2062 }
2063
2064
2065 static void sn9c102_vm_open(struct vm_area_struct* vma)
2066 {
2067 struct sn9c102_frame_t* f = vma->vm_private_data;
2068 f->vma_use_count++;
2069 }
2070
2071
2072 static void sn9c102_vm_close(struct vm_area_struct* vma)
2073 {
2074 /* NOTE: buffers are not freed here */
2075 struct sn9c102_frame_t* f = vma->vm_private_data;
2076 f->vma_use_count--;
2077 }
2078
2079
2080 static const struct vm_operations_struct sn9c102_vm_ops = {
2081 .open = sn9c102_vm_open,
2082 .close = sn9c102_vm_close,
2083 };
2084
2085
2086 static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
2087 {
2088 struct sn9c102_device *cam = video_drvdata(filp);
2089 unsigned long size = vma->vm_end - vma->vm_start,
2090 start = vma->vm_start;
2091 void *pos;
2092 u32 i;
2093
2094 if (mutex_lock_interruptible(&cam->fileop_mutex))
2095 return -ERESTARTSYS;
2096
2097 if (cam->state & DEV_DISCONNECTED) {
2098 DBG(1, "Device not present");
2099 mutex_unlock(&cam->fileop_mutex);
2100 return -ENODEV;
2101 }
2102
2103 if (cam->state & DEV_MISCONFIGURED) {
2104 DBG(1, "The camera is misconfigured. Close and open it "
2105 "again.");
2106 mutex_unlock(&cam->fileop_mutex);
2107 return -EIO;
2108 }
2109
2110 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
2111 mutex_unlock(&cam->fileop_mutex);
2112 return -EACCES;
2113 }
2114
2115 if (cam->io != IO_MMAP ||
2116 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
2117 mutex_unlock(&cam->fileop_mutex);
2118 return -EINVAL;
2119 }
2120
2121 for (i = 0; i < cam->nbuffers; i++) {
2122 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
2123 break;
2124 }
2125 if (i == cam->nbuffers) {
2126 mutex_unlock(&cam->fileop_mutex);
2127 return -EINVAL;
2128 }
2129
2130 vma->vm_flags |= VM_IO;
2131 vma->vm_flags |= VM_RESERVED;
2132
2133 pos = cam->frame[i].bufmem;
2134 while (size > 0) { /* size is page-aligned */
2135 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
2136 mutex_unlock(&cam->fileop_mutex);
2137 return -EAGAIN;
2138 }
2139 start += PAGE_SIZE;
2140 pos += PAGE_SIZE;
2141 size -= PAGE_SIZE;
2142 }
2143
2144 vma->vm_ops = &sn9c102_vm_ops;
2145 vma->vm_private_data = &cam->frame[i];
2146 sn9c102_vm_open(vma);
2147
2148 mutex_unlock(&cam->fileop_mutex);
2149
2150 return 0;
2151 }
2152
2153 /*****************************************************************************/
2154
2155 static int
2156 sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
2157 {
2158 struct v4l2_capability cap = {
2159 .driver = "sn9c102",
2160 .version = SN9C102_MODULE_VERSION_CODE,
2161 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
2162 V4L2_CAP_STREAMING,
2163 };
2164
2165 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
2166 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
2167 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
2168 sizeof(cap.bus_info));
2169
2170 if (copy_to_user(arg, &cap, sizeof(cap)))
2171 return -EFAULT;
2172
2173 return 0;
2174 }
2175
2176
2177 static int
2178 sn9c102_vidioc_enuminput(struct sn9c102_device* cam, void __user * arg)
2179 {
2180 struct v4l2_input i;
2181
2182 if (copy_from_user(&i, arg, sizeof(i)))
2183 return -EFAULT;
2184
2185 if (i.index)
2186 return -EINVAL;
2187
2188 memset(&i, 0, sizeof(i));
2189 strcpy(i.name, "Camera");
2190 i.type = V4L2_INPUT_TYPE_CAMERA;
2191
2192 if (copy_to_user(arg, &i, sizeof(i)))
2193 return -EFAULT;
2194
2195 return 0;
2196 }
2197
2198
2199 static int
2200 sn9c102_vidioc_g_input(struct sn9c102_device* cam, void __user * arg)
2201 {
2202 int index = 0;
2203
2204 if (copy_to_user(arg, &index, sizeof(index)))
2205 return -EFAULT;
2206
2207 return 0;
2208 }
2209
2210
2211 static int
2212 sn9c102_vidioc_s_input(struct sn9c102_device* cam, void __user * arg)
2213 {
2214 int index;
2215
2216 if (copy_from_user(&index, arg, sizeof(index)))
2217 return -EFAULT;
2218
2219 if (index != 0)
2220 return -EINVAL;
2221
2222 return 0;
2223 }
2224
2225
2226 static int
2227 sn9c102_vidioc_query_ctrl(struct sn9c102_device* cam, void __user * arg)
2228 {
2229 struct sn9c102_sensor* s = &cam->sensor;
2230 struct v4l2_queryctrl qc;
2231 u8 i;
2232
2233 if (copy_from_user(&qc, arg, sizeof(qc)))
2234 return -EFAULT;
2235
2236 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2237 if (qc.id && qc.id == s->qctrl[i].id) {
2238 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
2239 if (copy_to_user(arg, &qc, sizeof(qc)))
2240 return -EFAULT;
2241 return 0;
2242 }
2243
2244 return -EINVAL;
2245 }
2246
2247
2248 static int
2249 sn9c102_vidioc_g_ctrl(struct sn9c102_device* cam, void __user * arg)
2250 {
2251 struct sn9c102_sensor* s = &cam->sensor;
2252 struct v4l2_control ctrl;
2253 int err = 0;
2254 u8 i;
2255
2256 if (!s->get_ctrl && !s->set_ctrl)
2257 return -EINVAL;
2258
2259 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2260 return -EFAULT;
2261
2262 if (!s->get_ctrl) {
2263 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2264 if (ctrl.id && ctrl.id == s->qctrl[i].id) {
2265 ctrl.value = s->_qctrl[i].default_value;
2266 goto exit;
2267 }
2268 return -EINVAL;
2269 } else
2270 err = s->get_ctrl(cam, &ctrl);
2271
2272 exit:
2273 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
2274 return -EFAULT;
2275
2276 PDBGG("VIDIOC_G_CTRL: id %lu, value %lu",
2277 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2278
2279 return err;
2280 }
2281
2282
2283 static int
2284 sn9c102_vidioc_s_ctrl(struct sn9c102_device* cam, void __user * arg)
2285 {
2286 struct sn9c102_sensor* s = &cam->sensor;
2287 struct v4l2_control ctrl;
2288 u8 i;
2289 int err = 0;
2290
2291 if (!s->set_ctrl)
2292 return -EINVAL;
2293
2294 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2295 return -EFAULT;
2296
2297 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2298 if (ctrl.id == s->qctrl[i].id) {
2299 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
2300 return -EINVAL;
2301 if (ctrl.value < s->qctrl[i].minimum ||
2302 ctrl.value > s->qctrl[i].maximum)
2303 return -ERANGE;
2304 ctrl.value -= ctrl.value % s->qctrl[i].step;
2305 break;
2306 }
2307
2308 if ((err = s->set_ctrl(cam, &ctrl)))
2309 return err;
2310
2311 s->_qctrl[i].default_value = ctrl.value;
2312
2313 PDBGG("VIDIOC_S_CTRL: id %lu, value %lu",
2314 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2315
2316 return 0;
2317 }
2318
2319
2320 static int
2321 sn9c102_vidioc_cropcap(struct sn9c102_device* cam, void __user * arg)
2322 {
2323 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
2324
2325 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2326 cc->pixelaspect.numerator = 1;
2327 cc->pixelaspect.denominator = 1;
2328
2329 if (copy_to_user(arg, cc, sizeof(*cc)))
2330 return -EFAULT;
2331
2332 return 0;
2333 }
2334
2335
2336 static int
2337 sn9c102_vidioc_g_crop(struct sn9c102_device* cam, void __user * arg)
2338 {
2339 struct sn9c102_sensor* s = &cam->sensor;
2340 struct v4l2_crop crop = {
2341 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2342 };
2343
2344 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
2345
2346 if (copy_to_user(arg, &crop, sizeof(crop)))
2347 return -EFAULT;
2348
2349 return 0;
2350 }
2351
2352
2353 static int
2354 sn9c102_vidioc_s_crop(struct sn9c102_device* cam, void __user * arg)
2355 {
2356 struct sn9c102_sensor* s = &cam->sensor;
2357 struct v4l2_crop crop;
2358 struct v4l2_rect* rect;
2359 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2360 struct v4l2_pix_format* pix_format = &(s->pix_format);
2361 u8 scale;
2362 const enum sn9c102_stream_state stream = cam->stream;
2363 const u32 nbuffers = cam->nbuffers;
2364 u32 i;
2365 int err = 0;
2366
2367 if (copy_from_user(&crop, arg, sizeof(crop)))
2368 return -EFAULT;
2369
2370 rect = &(crop.c);
2371
2372 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2373 return -EINVAL;
2374
2375 if (cam->module_param.force_munmap)
2376 for (i = 0; i < cam->nbuffers; i++)
2377 if (cam->frame[i].vma_use_count) {
2378 DBG(3, "VIDIOC_S_CROP failed. "
2379 "Unmap the buffers first.");
2380 return -EBUSY;
2381 }
2382
2383 /* Preserve R,G or B origin */
2384 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
2385 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
2386
2387 if (rect->width < 16)
2388 rect->width = 16;
2389 if (rect->height < 16)
2390 rect->height = 16;
2391 if (rect->width > bounds->width)
2392 rect->width = bounds->width;
2393 if (rect->height > bounds->height)
2394 rect->height = bounds->height;
2395 if (rect->left < bounds->left)
2396 rect->left = bounds->left;
2397 if (rect->top < bounds->top)
2398 rect->top = bounds->top;
2399 if (rect->left + rect->width > bounds->left + bounds->width)
2400 rect->left = bounds->left+bounds->width - rect->width;
2401 if (rect->top + rect->height > bounds->top + bounds->height)
2402 rect->top = bounds->top+bounds->height - rect->height;
2403
2404 rect->width &= ~15L;
2405 rect->height &= ~15L;
2406
2407 if (SN9C102_PRESERVE_IMGSCALE) {
2408 /* Calculate the actual scaling factor */
2409 u32 a, b;
2410 a = rect->width * rect->height;
2411 b = pix_format->width * pix_format->height;
2412 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2413 } else
2414 scale = 1;
2415
2416 if (cam->stream == STREAM_ON)
2417 if ((err = sn9c102_stream_interrupt(cam)))
2418 return err;
2419
2420 if (copy_to_user(arg, &crop, sizeof(crop))) {
2421 cam->stream = stream;
2422 return -EFAULT;
2423 }
2424
2425 if (cam->module_param.force_munmap || cam->io == IO_READ)
2426 sn9c102_release_buffers(cam);
2427
2428 err = sn9c102_set_crop(cam, rect);
2429 if (s->set_crop)
2430 err += s->set_crop(cam, rect);
2431 err += sn9c102_set_scale(cam, scale);
2432
2433 if (err) { /* atomic, no rollback in ioctl() */
2434 cam->state |= DEV_MISCONFIGURED;
2435 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
2436 "use the camera, close and open /dev/video%d again.",
2437 cam->v4ldev->num);
2438 return -EIO;
2439 }
2440
2441 s->pix_format.width = rect->width/scale;
2442 s->pix_format.height = rect->height/scale;
2443 memcpy(&(s->_rect), rect, sizeof(*rect));
2444
2445 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2446 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2447 cam->state |= DEV_MISCONFIGURED;
2448 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
2449 "use the camera, close and open /dev/video%d again.",
2450 cam->v4ldev->num);
2451 return -ENOMEM;
2452 }
2453
2454 if (cam->io == IO_READ)
2455 sn9c102_empty_framequeues(cam);
2456 else if (cam->module_param.force_munmap)
2457 sn9c102_requeue_outqueue(cam);
2458
2459 cam->stream = stream;
2460
2461 return 0;
2462 }
2463
2464
2465 static int
2466 sn9c102_vidioc_enum_framesizes(struct sn9c102_device* cam, void __user * arg)
2467 {
2468 struct v4l2_frmsizeenum frmsize;
2469
2470 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
2471 return -EFAULT;
2472
2473 if (frmsize.index != 0)
2474 return -EINVAL;
2475
2476 switch (cam->bridge) {
2477 case BRIDGE_SN9C101:
2478 case BRIDGE_SN9C102:
2479 case BRIDGE_SN9C103:
2480 if (frmsize.pixel_format != V4L2_PIX_FMT_SN9C10X &&
2481 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2482 return -EINVAL;
2483 case BRIDGE_SN9C105:
2484 case BRIDGE_SN9C120:
2485 if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG &&
2486 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2487 return -EINVAL;
2488 }
2489
2490 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
2491 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
2492 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
2493 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
2494 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
2495 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
2496
2497 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
2498 return -EFAULT;
2499
2500 return 0;
2501 }
2502
2503
2504 static int
2505 sn9c102_vidioc_enum_fmt(struct sn9c102_device* cam, void __user * arg)
2506 {
2507 struct v4l2_fmtdesc fmtd;
2508
2509 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
2510 return -EFAULT;
2511
2512 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2513 return -EINVAL;
2514
2515 if (fmtd.index == 0) {
2516 strcpy(fmtd.description, "bayer rgb");
2517 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
2518 } else if (fmtd.index == 1) {
2519 switch (cam->bridge) {
2520 case BRIDGE_SN9C101:
2521 case BRIDGE_SN9C102:
2522 case BRIDGE_SN9C103:
2523 strcpy(fmtd.description, "compressed");
2524 fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X;
2525 break;
2526 case BRIDGE_SN9C105:
2527 case BRIDGE_SN9C120:
2528 strcpy(fmtd.description, "JPEG");
2529 fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
2530 break;
2531 }
2532 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
2533 } else
2534 return -EINVAL;
2535
2536 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2537 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
2538
2539 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
2540 return -EFAULT;
2541
2542 return 0;
2543 }
2544
2545
2546 static int
2547 sn9c102_vidioc_g_fmt(struct sn9c102_device* cam, void __user * arg)
2548 {
2549 struct v4l2_format format;
2550 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
2551
2552 if (copy_from_user(&format, arg, sizeof(format)))
2553 return -EFAULT;
2554
2555 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2556 return -EINVAL;
2557
2558 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_JPEG) ?
2559 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2560 pfmt->bytesperline = (pfmt->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2561 pfmt->pixelformat == V4L2_PIX_FMT_JPEG)
2562 ? 0 : (pfmt->width * pfmt->priv) / 8;
2563 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
2564 pfmt->field = V4L2_FIELD_NONE;
2565 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
2566
2567 if (copy_to_user(arg, &format, sizeof(format)))
2568 return -EFAULT;
2569
2570 return 0;
2571 }
2572
2573
2574 static int
2575 sn9c102_vidioc_try_s_fmt(struct sn9c102_device* cam, unsigned int cmd,
2576 void __user * arg)
2577 {
2578 struct sn9c102_sensor* s = &cam->sensor;
2579 struct v4l2_format format;
2580 struct v4l2_pix_format* pix;
2581 struct v4l2_pix_format* pfmt = &(s->pix_format);
2582 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2583 struct v4l2_rect rect;
2584 u8 scale;
2585 const enum sn9c102_stream_state stream = cam->stream;
2586 const u32 nbuffers = cam->nbuffers;
2587 u32 i;
2588 int err = 0;
2589
2590 if (copy_from_user(&format, arg, sizeof(format)))
2591 return -EFAULT;
2592
2593 pix = &(format.fmt.pix);
2594
2595 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2596 return -EINVAL;
2597
2598 memcpy(&rect, &(s->_rect), sizeof(rect));
2599
2600 { /* calculate the actual scaling factor */
2601 u32 a, b;
2602 a = rect.width * rect.height;
2603 b = pix->width * pix->height;
2604 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2605 }
2606
2607 rect.width = scale * pix->width;
2608 rect.height = scale * pix->height;
2609
2610 if (rect.width < 16)
2611 rect.width = 16;
2612 if (rect.height < 16)
2613 rect.height = 16;
2614 if (rect.width > bounds->left + bounds->width - rect.left)
2615 rect.width = bounds->left + bounds->width - rect.left;
2616 if (rect.height > bounds->top + bounds->height - rect.top)
2617 rect.height = bounds->top + bounds->height - rect.top;
2618
2619 rect.width &= ~15L;
2620 rect.height &= ~15L;
2621
2622 { /* adjust the scaling factor */
2623 u32 a, b;
2624 a = rect.width * rect.height;
2625 b = pix->width * pix->height;
2626 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2627 }
2628
2629 pix->width = rect.width / scale;
2630 pix->height = rect.height / scale;
2631
2632 switch (cam->bridge) {
2633 case BRIDGE_SN9C101:
2634 case BRIDGE_SN9C102:
2635 case BRIDGE_SN9C103:
2636 if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X &&
2637 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2638 pix->pixelformat = pfmt->pixelformat;
2639 break;
2640 case BRIDGE_SN9C105:
2641 case BRIDGE_SN9C120:
2642 if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
2643 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2644 pix->pixelformat = pfmt->pixelformat;
2645 break;
2646 }
2647 pix->priv = pfmt->priv; /* bpp */
2648 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_JPEG) ?
2649 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2650 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2651 pix->pixelformat == V4L2_PIX_FMT_JPEG)
2652 ? 0 : (pix->width * pix->priv) / 8;
2653 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2654 pix->field = V4L2_FIELD_NONE;
2655
2656 if (cmd == VIDIOC_TRY_FMT) {
2657 if (copy_to_user(arg, &format, sizeof(format)))
2658 return -EFAULT;
2659 return 0;
2660 }
2661
2662 if (cam->module_param.force_munmap)
2663 for (i = 0; i < cam->nbuffers; i++)
2664 if (cam->frame[i].vma_use_count) {
2665 DBG(3, "VIDIOC_S_FMT failed. Unmap the "
2666 "buffers first.");
2667 return -EBUSY;
2668 }
2669
2670 if (cam->stream == STREAM_ON)
2671 if ((err = sn9c102_stream_interrupt(cam)))
2672 return err;
2673
2674 if (copy_to_user(arg, &format, sizeof(format))) {
2675 cam->stream = stream;
2676 return -EFAULT;
2677 }
2678
2679 if (cam->module_param.force_munmap || cam->io == IO_READ)
2680 sn9c102_release_buffers(cam);
2681
2682 err += sn9c102_set_pix_format(cam, pix);
2683 err += sn9c102_set_crop(cam, &rect);
2684 if (s->set_pix_format)
2685 err += s->set_pix_format(cam, pix);
2686 if (s->set_crop)
2687 err += s->set_crop(cam, &rect);
2688 err += sn9c102_set_scale(cam, scale);
2689
2690 if (err) { /* atomic, no rollback in ioctl() */
2691 cam->state |= DEV_MISCONFIGURED;
2692 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2693 "use the camera, close and open /dev/video%d again.",
2694 cam->v4ldev->num);
2695 return -EIO;
2696 }
2697
2698 memcpy(pfmt, pix, sizeof(*pix));
2699 memcpy(&(s->_rect), &rect, sizeof(rect));
2700
2701 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2702 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2703 cam->state |= DEV_MISCONFIGURED;
2704 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2705 "use the camera, close and open /dev/video%d again.",
2706 cam->v4ldev->num);
2707 return -ENOMEM;
2708 }
2709
2710 if (cam->io == IO_READ)
2711 sn9c102_empty_framequeues(cam);
2712 else if (cam->module_param.force_munmap)
2713 sn9c102_requeue_outqueue(cam);
2714
2715 cam->stream = stream;
2716
2717 return 0;
2718 }
2719
2720
2721 static int
2722 sn9c102_vidioc_g_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2723 {
2724 if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
2725 return -EFAULT;
2726
2727 return 0;
2728 }
2729
2730
2731 static int
2732 sn9c102_vidioc_s_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2733 {
2734 struct v4l2_jpegcompression jc;
2735 const enum sn9c102_stream_state stream = cam->stream;
2736 int err = 0;
2737
2738 if (copy_from_user(&jc, arg, sizeof(jc)))
2739 return -EFAULT;
2740
2741 if (jc.quality != 0 && jc.quality != 1)
2742 return -EINVAL;
2743
2744 if (cam->stream == STREAM_ON)
2745 if ((err = sn9c102_stream_interrupt(cam)))
2746 return err;
2747
2748 err += sn9c102_set_compression(cam, &jc);
2749 if (err) { /* atomic, no rollback in ioctl() */
2750 cam->state |= DEV_MISCONFIGURED;
2751 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2752 "problems. To use the camera, close and open "
2753 "/dev/video%d again.", cam->v4ldev->num);
2754 return -EIO;
2755 }
2756
2757 cam->compression.quality = jc.quality;
2758
2759 cam->stream = stream;
2760
2761 return 0;
2762 }
2763
2764
2765 static int
2766 sn9c102_vidioc_reqbufs(struct sn9c102_device* cam, void __user * arg)
2767 {
2768 struct v4l2_requestbuffers rb;
2769 u32 i;
2770 int err;
2771
2772 if (copy_from_user(&rb, arg, sizeof(rb)))
2773 return -EFAULT;
2774
2775 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2776 rb.memory != V4L2_MEMORY_MMAP)
2777 return -EINVAL;
2778
2779 if (cam->io == IO_READ) {
2780 DBG(3, "Close and open the device again to choose the mmap "
2781 "I/O method");
2782 return -EBUSY;
2783 }
2784
2785 for (i = 0; i < cam->nbuffers; i++)
2786 if (cam->frame[i].vma_use_count) {
2787 DBG(3, "VIDIOC_REQBUFS failed. Previous buffers are "
2788 "still mapped.");
2789 return -EBUSY;
2790 }
2791
2792 if (cam->stream == STREAM_ON)
2793 if ((err = sn9c102_stream_interrupt(cam)))
2794 return err;
2795
2796 sn9c102_empty_framequeues(cam);
2797
2798 sn9c102_release_buffers(cam);
2799 if (rb.count)
2800 rb.count = sn9c102_request_buffers(cam, rb.count, IO_MMAP);
2801
2802 if (copy_to_user(arg, &rb, sizeof(rb))) {
2803 sn9c102_release_buffers(cam);
2804 cam->io = IO_NONE;
2805 return -EFAULT;
2806 }
2807
2808 cam->io = rb.count ? IO_MMAP : IO_NONE;
2809
2810 return 0;
2811 }
2812
2813
2814 static int
2815 sn9c102_vidioc_querybuf(struct sn9c102_device* cam, void __user * arg)
2816 {
2817 struct v4l2_buffer b;
2818
2819 if (copy_from_user(&b, arg, sizeof(b)))
2820 return -EFAULT;
2821
2822 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2823 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2824 return -EINVAL;
2825
2826 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2827
2828 if (cam->frame[b.index].vma_use_count)
2829 b.flags |= V4L2_BUF_FLAG_MAPPED;
2830
2831 if (cam->frame[b.index].state == F_DONE)
2832 b.flags |= V4L2_BUF_FLAG_DONE;
2833 else if (cam->frame[b.index].state != F_UNUSED)
2834 b.flags |= V4L2_BUF_FLAG_QUEUED;
2835
2836 if (copy_to_user(arg, &b, sizeof(b)))
2837 return -EFAULT;
2838
2839 return 0;
2840 }
2841
2842
2843 static int
2844 sn9c102_vidioc_qbuf(struct sn9c102_device* cam, void __user * arg)
2845 {
2846 struct v4l2_buffer b;
2847 unsigned long lock_flags;
2848
2849 if (copy_from_user(&b, arg, sizeof(b)))
2850 return -EFAULT;
2851
2852 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2853 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2854 return -EINVAL;
2855
2856 if (cam->frame[b.index].state != F_UNUSED)
2857 return -EINVAL;
2858
2859 cam->frame[b.index].state = F_QUEUED;
2860
2861 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2862 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2863 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2864
2865 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2866
2867 return 0;
2868 }
2869
2870
2871 static int
2872 sn9c102_vidioc_dqbuf(struct sn9c102_device* cam, struct file* filp,
2873 void __user * arg)
2874 {
2875 struct v4l2_buffer b;
2876 struct sn9c102_frame_t *f;
2877 unsigned long lock_flags;
2878 long timeout;
2879 int err = 0;
2880
2881 if (copy_from_user(&b, arg, sizeof(b)))
2882 return -EFAULT;
2883
2884 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2885 return -EINVAL;
2886
2887 if (list_empty(&cam->outqueue)) {
2888 if (cam->stream == STREAM_OFF)
2889 return -EINVAL;
2890 if (filp->f_flags & O_NONBLOCK)
2891 return -EAGAIN;
2892 if (!cam->module_param.frame_timeout) {
2893 err = wait_event_interruptible
2894 ( cam->wait_frame,
2895 (!list_empty(&cam->outqueue)) ||
2896 (cam->state & DEV_DISCONNECTED) ||
2897 (cam->state & DEV_MISCONFIGURED) );
2898 if (err)
2899 return err;
2900 } else {
2901 timeout = wait_event_interruptible_timeout
2902 ( cam->wait_frame,
2903 (!list_empty(&cam->outqueue)) ||
2904 (cam->state & DEV_DISCONNECTED) ||
2905 (cam->state & DEV_MISCONFIGURED),
2906 cam->module_param.frame_timeout *
2907 1000 * msecs_to_jiffies(1) );
2908 if (timeout < 0)
2909 return timeout;
2910 else if (timeout == 0 &&
2911 !(cam->state & DEV_DISCONNECTED)) {
2912 DBG(1, "Video frame timeout elapsed");
2913 return -EIO;
2914 }
2915 }
2916 if (cam->state & DEV_DISCONNECTED)
2917 return -ENODEV;
2918 if (cam->state & DEV_MISCONFIGURED)
2919 return -EIO;
2920 }
2921
2922 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2923 f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, frame);
2924 list_del(cam->outqueue.next);
2925 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2926
2927 f->state = F_UNUSED;
2928
2929 memcpy(&b, &f->buf, sizeof(b));
2930 if (f->vma_use_count)
2931 b.flags |= V4L2_BUF_FLAG_MAPPED;
2932
2933 if (copy_to_user(arg, &b, sizeof(b)))
2934 return -EFAULT;
2935
2936 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2937
2938 return 0;
2939 }
2940
2941
2942 static int
2943 sn9c102_vidioc_streamon(struct sn9c102_device* cam, void __user * arg)
2944 {
2945 int type;
2946
2947 if (copy_from_user(&type, arg, sizeof(type)))
2948 return -EFAULT;
2949
2950 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2951 return -EINVAL;
2952
2953 cam->stream = STREAM_ON;
2954
2955 DBG(3, "Stream on");
2956
2957 return 0;
2958 }
2959
2960
2961 static int
2962 sn9c102_vidioc_streamoff(struct sn9c102_device* cam, void __user * arg)
2963 {
2964 int type, err;
2965
2966 if (copy_from_user(&type, arg, sizeof(type)))
2967 return -EFAULT;
2968
2969 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2970 return -EINVAL;
2971
2972 if (cam->stream == STREAM_ON)
2973 if ((err = sn9c102_stream_interrupt(cam)))
2974 return err;
2975
2976 sn9c102_empty_framequeues(cam);
2977
2978 DBG(3, "Stream off");
2979
2980 return 0;
2981 }
2982
2983
2984 static int
2985 sn9c102_vidioc_g_parm(struct sn9c102_device* cam, void __user * arg)
2986 {
2987 struct v4l2_streamparm sp;
2988
2989 if (copy_from_user(&sp, arg, sizeof(sp)))
2990 return -EFAULT;
2991
2992 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2993 return -EINVAL;
2994
2995 sp.parm.capture.extendedmode = 0;
2996 sp.parm.capture.readbuffers = cam->nreadbuffers;
2997
2998 if (copy_to_user(arg, &sp, sizeof(sp)))
2999 return -EFAULT;
3000
3001 return 0;
3002 }
3003
3004
3005 static int
3006 sn9c102_vidioc_s_parm(struct sn9c102_device* cam, void __user * arg)
3007 {
3008 struct v4l2_streamparm sp;
3009
3010 if (copy_from_user(&sp, arg, sizeof(sp)))
3011 return -EFAULT;
3012
3013 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
3014 return -EINVAL;
3015
3016 sp.parm.capture.extendedmode = 0;
3017
3018 if (sp.parm.capture.readbuffers == 0)
3019 sp.parm.capture.readbuffers = cam->nreadbuffers;
3020
3021 if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES)
3022 sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES;
3023
3024 if (copy_to_user(arg, &sp, sizeof(sp)))
3025 return -EFAULT;
3026
3027 cam->nreadbuffers = sp.parm.capture.readbuffers;
3028
3029 return 0;
3030 }
3031
3032
3033 static int
3034 sn9c102_vidioc_enumaudio(struct sn9c102_device* cam, void __user * arg)
3035 {
3036 struct v4l2_audio audio;
3037
3038 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3039 return -EINVAL;
3040
3041 if (copy_from_user(&audio, arg, sizeof(audio)))
3042 return -EFAULT;
3043
3044 if (audio.index != 0)
3045 return -EINVAL;
3046
3047 strcpy(audio.name, "Microphone");
3048 audio.capability = 0;
3049 audio.mode = 0;
3050
3051 if (copy_to_user(arg, &audio, sizeof(audio)))
3052 return -EFAULT;
3053
3054 return 0;
3055 }
3056
3057
3058 static int
3059 sn9c102_vidioc_g_audio(struct sn9c102_device* cam, void __user * arg)
3060 {
3061 struct v4l2_audio audio;
3062
3063 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3064 return -EINVAL;
3065
3066 if (copy_from_user(&audio, arg, sizeof(audio)))
3067 return -EFAULT;
3068
3069 memset(&audio, 0, sizeof(audio));
3070 strcpy(audio.name, "Microphone");
3071
3072 if (copy_to_user(arg, &audio, sizeof(audio)))
3073 return -EFAULT;
3074
3075 return 0;
3076 }
3077
3078
3079 static int
3080 sn9c102_vidioc_s_audio(struct sn9c102_device* cam, void __user * arg)
3081 {
3082 struct v4l2_audio audio;
3083
3084 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3085 return -EINVAL;
3086
3087 if (copy_from_user(&audio, arg, sizeof(audio)))
3088 return -EFAULT;
3089
3090 if (audio.index != 0)
3091 return -EINVAL;
3092
3093 return 0;
3094 }
3095
3096
3097 static long sn9c102_ioctl_v4l2(struct file *filp,
3098 unsigned int cmd, void __user *arg)
3099 {
3100 struct sn9c102_device *cam = video_drvdata(filp);
3101
3102 switch (cmd) {
3103
3104 case VIDIOC_QUERYCAP:
3105 return sn9c102_vidioc_querycap(cam, arg);
3106
3107 case VIDIOC_ENUMINPUT:
3108 return sn9c102_vidioc_enuminput(cam, arg);
3109
3110 case VIDIOC_G_INPUT:
3111 return sn9c102_vidioc_g_input(cam, arg);
3112
3113 case VIDIOC_S_INPUT:
3114 return sn9c102_vidioc_s_input(cam, arg);
3115
3116 case VIDIOC_QUERYCTRL:
3117 return sn9c102_vidioc_query_ctrl(cam, arg);
3118
3119 case VIDIOC_G_CTRL:
3120 return sn9c102_vidioc_g_ctrl(cam, arg);
3121
3122 case VIDIOC_S_CTRL:
3123 return sn9c102_vidioc_s_ctrl(cam, arg);
3124
3125 case VIDIOC_CROPCAP:
3126 return sn9c102_vidioc_cropcap(cam, arg);
3127
3128 case VIDIOC_G_CROP:
3129 return sn9c102_vidioc_g_crop(cam, arg);
3130
3131 case VIDIOC_S_CROP:
3132 return sn9c102_vidioc_s_crop(cam, arg);
3133
3134 case VIDIOC_ENUM_FRAMESIZES:
3135 return sn9c102_vidioc_enum_framesizes(cam, arg);
3136
3137 case VIDIOC_ENUM_FMT:
3138 return sn9c102_vidioc_enum_fmt(cam, arg);
3139
3140 case VIDIOC_G_FMT:
3141 return sn9c102_vidioc_g_fmt(cam, arg);
3142
3143 case VIDIOC_TRY_FMT:
3144 case VIDIOC_S_FMT:
3145 return sn9c102_vidioc_try_s_fmt(cam, cmd, arg);
3146
3147 case VIDIOC_G_JPEGCOMP:
3148 return sn9c102_vidioc_g_jpegcomp(cam, arg);
3149
3150 case VIDIOC_S_JPEGCOMP:
3151 return sn9c102_vidioc_s_jpegcomp(cam, arg);
3152
3153 case VIDIOC_REQBUFS:
3154 return sn9c102_vidioc_reqbufs(cam, arg);
3155
3156 case VIDIOC_QUERYBUF:
3157 return sn9c102_vidioc_querybuf(cam, arg);
3158
3159 case VIDIOC_QBUF:
3160 return sn9c102_vidioc_qbuf(cam, arg);
3161
3162 case VIDIOC_DQBUF:
3163 return sn9c102_vidioc_dqbuf(cam, filp, arg);
3164
3165 case VIDIOC_STREAMON:
3166 return sn9c102_vidioc_streamon(cam, arg);
3167
3168 case VIDIOC_STREAMOFF:
3169 return sn9c102_vidioc_streamoff(cam, arg);
3170
3171 case VIDIOC_G_PARM:
3172 return sn9c102_vidioc_g_parm(cam, arg);
3173
3174 case VIDIOC_S_PARM:
3175 return sn9c102_vidioc_s_parm(cam, arg);
3176
3177 case VIDIOC_ENUMAUDIO:
3178 return sn9c102_vidioc_enumaudio(cam, arg);
3179
3180 case VIDIOC_G_AUDIO:
3181 return sn9c102_vidioc_g_audio(cam, arg);
3182
3183 case VIDIOC_S_AUDIO:
3184 return sn9c102_vidioc_s_audio(cam, arg);
3185
3186 case VIDIOC_G_STD:
3187 case VIDIOC_S_STD:
3188 case VIDIOC_QUERYSTD:
3189 case VIDIOC_ENUMSTD:
3190 case VIDIOC_QUERYMENU:
3191 case VIDIOC_ENUM_FRAMEINTERVALS:
3192 return -EINVAL;
3193
3194 default:
3195 return -EINVAL;
3196
3197 }
3198 }
3199
3200
3201 static long sn9c102_ioctl(struct file *filp,
3202 unsigned int cmd, unsigned long arg)
3203 {
3204 struct sn9c102_device *cam = video_drvdata(filp);
3205 int err = 0;
3206
3207 if (mutex_lock_interruptible(&cam->fileop_mutex))
3208 return -ERESTARTSYS;
3209
3210 if (cam->state & DEV_DISCONNECTED) {
3211 DBG(1, "Device not present");
3212 mutex_unlock(&cam->fileop_mutex);
3213 return -ENODEV;
3214 }
3215
3216 if (cam->state & DEV_MISCONFIGURED) {
3217 DBG(1, "The camera is misconfigured. Close and open it "
3218 "again.");
3219 mutex_unlock(&cam->fileop_mutex);
3220 return -EIO;
3221 }
3222
3223 V4LDBG(3, "sn9c102", cmd);
3224
3225 err = sn9c102_ioctl_v4l2(filp, cmd, (void __user *)arg);
3226
3227 mutex_unlock(&cam->fileop_mutex);
3228
3229 return err;
3230 }
3231
3232 /*****************************************************************************/
3233
3234 static const struct v4l2_file_operations sn9c102_fops = {
3235 .owner = THIS_MODULE,
3236 .open = sn9c102_open,
3237 .release = sn9c102_release,
3238 .ioctl = sn9c102_ioctl,
3239 .read = sn9c102_read,
3240 .poll = sn9c102_poll,
3241 .mmap = sn9c102_mmap,
3242 };
3243
3244 /*****************************************************************************/
3245
3246 /* It exists a single interface only. We do not need to validate anything. */
3247 static int
3248 sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3249 {
3250 struct usb_device *udev = interface_to_usbdev(intf);
3251 struct sn9c102_device* cam;
3252 static unsigned int dev_nr;
3253 unsigned int i;
3254 int err = 0, r;
3255
3256 if (!(cam = kzalloc(sizeof(struct sn9c102_device), GFP_KERNEL)))
3257 return -ENOMEM;
3258
3259 cam->usbdev = udev;
3260
3261 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
3262 DBG(1, "kzalloc() failed");
3263 err = -ENOMEM;
3264 goto fail;
3265 }
3266
3267 if (!(cam->v4ldev = video_device_alloc())) {
3268 DBG(1, "video_device_alloc() failed");
3269 err = -ENOMEM;
3270 goto fail;
3271 }
3272
3273 r = sn9c102_read_reg(cam, 0x00);
3274 if (r < 0 || (r != 0x10 && r != 0x11 && r != 0x12)) {
3275 DBG(1, "Sorry, this is not a SN9C1xx-based camera "
3276 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3277 err = -ENODEV;
3278 goto fail;
3279 }
3280
3281 cam->bridge = id->driver_info;
3282 switch (cam->bridge) {
3283 case BRIDGE_SN9C101:
3284 case BRIDGE_SN9C102:
3285 DBG(2, "SN9C10[12] PC Camera Controller detected "
3286 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3287 break;
3288 case BRIDGE_SN9C103:
3289 DBG(2, "SN9C103 PC Camera Controller detected "
3290 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3291 break;
3292 case BRIDGE_SN9C105:
3293 DBG(2, "SN9C105 PC Camera Controller detected "
3294 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3295 break;
3296 case BRIDGE_SN9C120:
3297 DBG(2, "SN9C120 PC Camera Controller detected "
3298 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3299 break;
3300 }
3301
3302 for (i = 0; i < ARRAY_SIZE(sn9c102_sensor_table); i++) {
3303 err = sn9c102_sensor_table[i](cam);
3304 if (!err)
3305 break;
3306 }
3307
3308 if (!err) {
3309 DBG(2, "%s image sensor detected", cam->sensor.name);
3310 DBG(3, "Support for %s maintained by %s",
3311 cam->sensor.name, cam->sensor.maintainer);
3312 } else {
3313 DBG(1, "No supported image sensor detected for this bridge");
3314 err = -ENODEV;
3315 goto fail;
3316 }
3317
3318 if (!(cam->bridge & cam->sensor.supported_bridge)) {
3319 DBG(1, "Bridge not supported");
3320 err = -ENODEV;
3321 goto fail;
3322 }
3323
3324 if (sn9c102_init(cam)) {
3325 DBG(1, "Initialization failed. I will retry on open().");
3326 cam->state |= DEV_MISCONFIGURED;
3327 }
3328
3329 strcpy(cam->v4ldev->name, "SN9C1xx PC Camera");
3330 cam->v4ldev->fops = &sn9c102_fops;
3331 cam->v4ldev->minor = video_nr[dev_nr];
3332 cam->v4ldev->release = video_device_release;
3333 cam->v4ldev->parent = &udev->dev;
3334
3335 init_completion(&cam->probe);
3336
3337 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
3338 video_nr[dev_nr]);
3339 if (err) {
3340 DBG(1, "V4L2 device registration failed");
3341 if (err == -ENFILE && video_nr[dev_nr] == -1)
3342 DBG(1, "Free /dev/videoX node not found");
3343 video_nr[dev_nr] = -1;
3344 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3345 complete_all(&cam->probe);
3346 goto fail;
3347 }
3348
3349 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->num);
3350
3351 video_set_drvdata(cam->v4ldev, cam);
3352 cam->module_param.force_munmap = force_munmap[dev_nr];
3353 cam->module_param.frame_timeout = frame_timeout[dev_nr];
3354
3355 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3356
3357 #ifdef CONFIG_VIDEO_ADV_DEBUG
3358 err = sn9c102_create_sysfs(cam);
3359 if (!err)
3360 DBG(2, "Optional device control through 'sysfs' "
3361 "interface ready");
3362 else
3363 DBG(2, "Failed to create optional 'sysfs' interface for "
3364 "device controlling. Error #%d", err);
3365 #else
3366 DBG(2, "Optional device control through 'sysfs' interface disabled");
3367 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
3368 "configuration option to enable it.");
3369 #endif
3370
3371 usb_set_intfdata(intf, cam);
3372 kref_init(&cam->kref);
3373 usb_get_dev(cam->usbdev);
3374
3375 complete_all(&cam->probe);
3376
3377 return 0;
3378
3379 fail:
3380 if (cam) {
3381 kfree(cam->control_buffer);
3382 if (cam->v4ldev)
3383 video_device_release(cam->v4ldev);
3384 kfree(cam);
3385 }
3386 return err;
3387 }
3388
3389
3390 static void sn9c102_usb_disconnect(struct usb_interface* intf)
3391 {
3392 struct sn9c102_device* cam;
3393
3394 down_write(&sn9c102_dev_lock);
3395
3396 cam = usb_get_intfdata(intf);
3397
3398 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
3399
3400 if (cam->users) {
3401 DBG(2, "Device /dev/video%d is open! Deregistration and "
3402 "memory deallocation are deferred.",
3403 cam->v4ldev->num);
3404 cam->state |= DEV_MISCONFIGURED;
3405 sn9c102_stop_transfer(cam);
3406 cam->state |= DEV_DISCONNECTED;
3407 wake_up_interruptible(&cam->wait_frame);
3408 wake_up(&cam->wait_stream);
3409 } else
3410 cam->state |= DEV_DISCONNECTED;
3411
3412 wake_up_interruptible_all(&cam->wait_open);
3413
3414 kref_put(&cam->kref, sn9c102_release_resources);
3415
3416 up_write(&sn9c102_dev_lock);
3417 }
3418
3419
3420 static struct usb_driver sn9c102_usb_driver = {
3421 .name = "sn9c102",
3422 .id_table = sn9c102_id_table,
3423 .probe = sn9c102_usb_probe,
3424 .disconnect = sn9c102_usb_disconnect,
3425 };
3426
3427 /*****************************************************************************/
3428
3429 static int __init sn9c102_module_init(void)
3430 {
3431 int err = 0;
3432
3433 KDBG(2, SN9C102_MODULE_NAME " v" SN9C102_MODULE_VERSION);
3434 KDBG(3, SN9C102_MODULE_AUTHOR);
3435
3436 if ((err = usb_register(&sn9c102_usb_driver)))
3437 KDBG(1, "usb_register() failed");
3438
3439 return err;
3440 }
3441
3442
3443 static void __exit sn9c102_module_exit(void)
3444 {
3445 usb_deregister(&sn9c102_usb_driver);
3446 }
3447
3448
3449 module_init(sn9c102_module_init);
3450 module_exit(sn9c102_module_exit);
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