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
sn9c102_request_buffers(struct sn9c102_device * cam,u32 count,enum sn9c102_io_method io)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
sn9c102_release_buffers(struct sn9c102_device * cam)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
sn9c102_empty_framequeues(struct sn9c102_device * cam)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
sn9c102_requeue_outqueue(struct sn9c102_device * cam)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
sn9c102_queue_unusedframes(struct sn9c102_device * cam)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 */
sn9c102_write_regs(struct sn9c102_device * cam,const u8 valreg[][2],int count)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
sn9c102_write_reg(struct sn9c102_device * cam,u8 value,u16 index)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 */
sn9c102_read_reg(struct sn9c102_device * cam,u16 index)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
sn9c102_pread_reg(struct sn9c102_device * cam,u16 index)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
sn9c102_i2c_wait(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor)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
sn9c102_i2c_detect_read_error(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor)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
sn9c102_i2c_detect_write_error(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor)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
sn9c102_i2c_try_raw_read(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor,u8 data0,u8 data1,u8 n,u8 buffer[])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
sn9c102_i2c_try_raw_write(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor,u8 n,u8 data0,u8 data1,u8 data2,u8 data3,u8 data4,u8 data5)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
sn9c102_i2c_try_read(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor,u8 address)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
sn9c102_i2c_try_write(struct sn9c102_device * cam,const struct sn9c102_sensor * sensor,u8 address,u8 value)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
sn9c102_i2c_read(struct sn9c102_device * cam,u8 address)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
sn9c102_i2c_write(struct sn9c102_device * cam,u8 address,u8 value)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
sn9c102_sof_length(struct sn9c102_device * cam)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*
sn9c102_find_sof_header(struct sn9c102_device * cam,void * mem,size_t len)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*
sn9c102_find_eof_header(struct sn9c102_device * cam,void * mem,size_t len)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
sn9c102_write_jpegheader(struct sn9c102_device * cam,struct sn9c102_frame_t * f)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
sn9c102_urb_complete(struct urb * urb)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
sn9c102_start_transfer(struct sn9c102_device * cam)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
sn9c102_stop_transfer(struct sn9c102_device * cam)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
sn9c102_stream_interrupt(struct sn9c102_device * cam)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
sn9c102_strtou16(const char * buff,size_t len,ssize_t * count)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
sn9c102_show_reg(struct device * cd,struct device_attribute * attr,char * buf)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
sn9c102_store_reg(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_show_val(struct device * cd,struct device_attribute * attr,char * buf)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
sn9c102_store_val(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_show_i2c_reg(struct device * cd,struct device_attribute * attr,char * buf)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
sn9c102_store_i2c_reg(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_show_i2c_val(struct device * cd,struct device_attribute * attr,char * buf)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
sn9c102_store_i2c_val(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_store_green(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_store_blue(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_store_red(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)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
sn9c102_show_frame_header(struct device * cd,struct device_attribute * attr,char * buf)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
sn9c102_create_sysfs(struct sn9c102_device * cam)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
sn9c102_set_pix_format(struct sn9c102_device * cam,struct v4l2_pix_format * pix)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
sn9c102_set_compression(struct sn9c102_device * cam,struct v4l2_jpegcompression * compression)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
sn9c102_set_scale(struct sn9c102_device * cam,u8 scale)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
sn9c102_set_crop(struct sn9c102_device * cam,struct v4l2_rect * rect)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
sn9c102_init(struct sn9c102_device * cam)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
sn9c102_release_resources(struct kref * kref)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
sn9c102_open(struct file * filp)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
sn9c102_release(struct file * filp)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
sn9c102_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)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 cam->module_param.frame_timeout *
1958 1000 * msecs_to_jiffies(1) );
1959 if (timeout < 0) {
1960 mutex_unlock(&cam->fileop_mutex);
1961 return timeout;
1962 } else if (timeout == 0 &&
1963 !(cam->state & DEV_DISCONNECTED)) {
1964 DBG(1, "Video frame timeout elapsed");
1965 mutex_unlock(&cam->fileop_mutex);
1966 return -EIO;
1967 }
1968 }
1969 if (cam->state & DEV_DISCONNECTED) {
1970 mutex_unlock(&cam->fileop_mutex);
1971 return -ENODEV;
1972 }
1973 if (cam->state & DEV_MISCONFIGURED) {
1974 mutex_unlock(&cam->fileop_mutex);
1975 return -EIO;
1976 }
1977 }
1978
1979 f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame);
1980
1981 if (count > f->buf.bytesused)
1982 count = f->buf.bytesused;
1983
1984 if (copy_to_user(buf, f->bufmem, count)) {
1985 err = -EFAULT;
1986 goto exit;
1987 }
1988 *f_pos += count;
1989
1990 exit:
1991 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1992 list_for_each_entry(i, &cam->outqueue, frame)
1993 i->state = F_UNUSED;
1994 INIT_LIST_HEAD(&cam->outqueue);
1995 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1996
1997 sn9c102_queue_unusedframes(cam);
1998
1999 PDBGG("Frame #%lu, bytes read: %zu",
2000 (unsigned long)f->buf.index, count);
2001
2002 mutex_unlock(&cam->fileop_mutex);
2003
2004 return count;
2005 }
2006
2007
sn9c102_poll(struct file * filp,poll_table * wait)2008 static unsigned int sn9c102_poll(struct file *filp, poll_table *wait)
2009 {
2010 struct sn9c102_device *cam = video_drvdata(filp);
2011 struct sn9c102_frame_t* f;
2012 unsigned long lock_flags;
2013 unsigned int mask = 0;
2014
2015 if (mutex_lock_interruptible(&cam->fileop_mutex))
2016 return POLLERR;
2017
2018 if (cam->state & DEV_DISCONNECTED) {
2019 DBG(1, "Device not present");
2020 goto error;
2021 }
2022
2023 if (cam->state & DEV_MISCONFIGURED) {
2024 DBG(1, "The camera is misconfigured. Close and open it "
2025 "again.");
2026 goto error;
2027 }
2028
2029 if (cam->io == IO_NONE) {
2030 if (!sn9c102_request_buffers(cam, cam->nreadbuffers,
2031 IO_READ)) {
2032 DBG(1, "poll() failed, not enough memory");
2033 goto error;
2034 }
2035 cam->io = IO_READ;
2036 cam->stream = STREAM_ON;
2037 }
2038
2039 if (cam->io == IO_READ) {
2040 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2041 list_for_each_entry(f, &cam->outqueue, frame)
2042 f->state = F_UNUSED;
2043 INIT_LIST_HEAD(&cam->outqueue);
2044 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2045 sn9c102_queue_unusedframes(cam);
2046 }
2047
2048 poll_wait(filp, &cam->wait_frame, wait);
2049
2050 if (!list_empty(&cam->outqueue))
2051 mask |= POLLIN | POLLRDNORM;
2052
2053 mutex_unlock(&cam->fileop_mutex);
2054
2055 return mask;
2056
2057 error:
2058 mutex_unlock(&cam->fileop_mutex);
2059 return POLLERR;
2060 }
2061
2062
sn9c102_vm_open(struct vm_area_struct * vma)2063 static void sn9c102_vm_open(struct vm_area_struct* vma)
2064 {
2065 struct sn9c102_frame_t* f = vma->vm_private_data;
2066 f->vma_use_count++;
2067 }
2068
2069
sn9c102_vm_close(struct vm_area_struct * vma)2070 static void sn9c102_vm_close(struct vm_area_struct* vma)
2071 {
2072 /* NOTE: buffers are not freed here */
2073 struct sn9c102_frame_t* f = vma->vm_private_data;
2074 f->vma_use_count--;
2075 }
2076
2077
2078 static struct vm_operations_struct sn9c102_vm_ops = {
2079 .open = sn9c102_vm_open,
2080 .close = sn9c102_vm_close,
2081 };
2082
2083
sn9c102_mmap(struct file * filp,struct vm_area_struct * vma)2084 static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
2085 {
2086 struct sn9c102_device *cam = video_drvdata(filp);
2087 unsigned long size = vma->vm_end - vma->vm_start,
2088 start = vma->vm_start;
2089 void *pos;
2090 u32 i;
2091
2092 if (mutex_lock_interruptible(&cam->fileop_mutex))
2093 return -ERESTARTSYS;
2094
2095 if (cam->state & DEV_DISCONNECTED) {
2096 DBG(1, "Device not present");
2097 mutex_unlock(&cam->fileop_mutex);
2098 return -ENODEV;
2099 }
2100
2101 if (cam->state & DEV_MISCONFIGURED) {
2102 DBG(1, "The camera is misconfigured. Close and open it "
2103 "again.");
2104 mutex_unlock(&cam->fileop_mutex);
2105 return -EIO;
2106 }
2107
2108 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
2109 mutex_unlock(&cam->fileop_mutex);
2110 return -EACCES;
2111 }
2112
2113 if (cam->io != IO_MMAP ||
2114 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
2115 mutex_unlock(&cam->fileop_mutex);
2116 return -EINVAL;
2117 }
2118
2119 for (i = 0; i < cam->nbuffers; i++) {
2120 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
2121 break;
2122 }
2123 if (i == cam->nbuffers) {
2124 mutex_unlock(&cam->fileop_mutex);
2125 return -EINVAL;
2126 }
2127
2128 vma->vm_flags |= VM_IO;
2129 vma->vm_flags |= VM_RESERVED;
2130
2131 pos = cam->frame[i].bufmem;
2132 while (size > 0) { /* size is page-aligned */
2133 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
2134 mutex_unlock(&cam->fileop_mutex);
2135 return -EAGAIN;
2136 }
2137 start += PAGE_SIZE;
2138 pos += PAGE_SIZE;
2139 size -= PAGE_SIZE;
2140 }
2141
2142 vma->vm_ops = &sn9c102_vm_ops;
2143 vma->vm_private_data = &cam->frame[i];
2144 sn9c102_vm_open(vma);
2145
2146 mutex_unlock(&cam->fileop_mutex);
2147
2148 return 0;
2149 }
2150
2151 /*****************************************************************************/
2152
2153 static int
sn9c102_vidioc_querycap(struct sn9c102_device * cam,void __user * arg)2154 sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
2155 {
2156 struct v4l2_capability cap = {
2157 .driver = "sn9c102",
2158 .version = SN9C102_MODULE_VERSION_CODE,
2159 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
2160 V4L2_CAP_STREAMING,
2161 };
2162
2163 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
2164 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
2165 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
2166 sizeof(cap.bus_info));
2167
2168 if (copy_to_user(arg, &cap, sizeof(cap)))
2169 return -EFAULT;
2170
2171 return 0;
2172 }
2173
2174
2175 static int
sn9c102_vidioc_enuminput(struct sn9c102_device * cam,void __user * arg)2176 sn9c102_vidioc_enuminput(struct sn9c102_device* cam, void __user * arg)
2177 {
2178 struct v4l2_input i;
2179
2180 if (copy_from_user(&i, arg, sizeof(i)))
2181 return -EFAULT;
2182
2183 if (i.index)
2184 return -EINVAL;
2185
2186 memset(&i, 0, sizeof(i));
2187 strcpy(i.name, "Camera");
2188 i.type = V4L2_INPUT_TYPE_CAMERA;
2189
2190 if (copy_to_user(arg, &i, sizeof(i)))
2191 return -EFAULT;
2192
2193 return 0;
2194 }
2195
2196
2197 static int
sn9c102_vidioc_g_input(struct sn9c102_device * cam,void __user * arg)2198 sn9c102_vidioc_g_input(struct sn9c102_device* cam, void __user * arg)
2199 {
2200 int index = 0;
2201
2202 if (copy_to_user(arg, &index, sizeof(index)))
2203 return -EFAULT;
2204
2205 return 0;
2206 }
2207
2208
2209 static int
sn9c102_vidioc_s_input(struct sn9c102_device * cam,void __user * arg)2210 sn9c102_vidioc_s_input(struct sn9c102_device* cam, void __user * arg)
2211 {
2212 int index;
2213
2214 if (copy_from_user(&index, arg, sizeof(index)))
2215 return -EFAULT;
2216
2217 if (index != 0)
2218 return -EINVAL;
2219
2220 return 0;
2221 }
2222
2223
2224 static int
sn9c102_vidioc_query_ctrl(struct sn9c102_device * cam,void __user * arg)2225 sn9c102_vidioc_query_ctrl(struct sn9c102_device* cam, void __user * arg)
2226 {
2227 struct sn9c102_sensor* s = &cam->sensor;
2228 struct v4l2_queryctrl qc;
2229 u8 i;
2230
2231 if (copy_from_user(&qc, arg, sizeof(qc)))
2232 return -EFAULT;
2233
2234 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2235 if (qc.id && qc.id == s->qctrl[i].id) {
2236 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
2237 if (copy_to_user(arg, &qc, sizeof(qc)))
2238 return -EFAULT;
2239 return 0;
2240 }
2241
2242 return -EINVAL;
2243 }
2244
2245
2246 static int
sn9c102_vidioc_g_ctrl(struct sn9c102_device * cam,void __user * arg)2247 sn9c102_vidioc_g_ctrl(struct sn9c102_device* cam, void __user * arg)
2248 {
2249 struct sn9c102_sensor* s = &cam->sensor;
2250 struct v4l2_control ctrl;
2251 int err = 0;
2252 u8 i;
2253
2254 if (!s->get_ctrl && !s->set_ctrl)
2255 return -EINVAL;
2256
2257 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2258 return -EFAULT;
2259
2260 if (!s->get_ctrl) {
2261 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2262 if (ctrl.id && ctrl.id == s->qctrl[i].id) {
2263 ctrl.value = s->_qctrl[i].default_value;
2264 goto exit;
2265 }
2266 return -EINVAL;
2267 } else
2268 err = s->get_ctrl(cam, &ctrl);
2269
2270 exit:
2271 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
2272 return -EFAULT;
2273
2274 PDBGG("VIDIOC_G_CTRL: id %lu, value %lu",
2275 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2276
2277 return err;
2278 }
2279
2280
2281 static int
sn9c102_vidioc_s_ctrl(struct sn9c102_device * cam,void __user * arg)2282 sn9c102_vidioc_s_ctrl(struct sn9c102_device* cam, void __user * arg)
2283 {
2284 struct sn9c102_sensor* s = &cam->sensor;
2285 struct v4l2_control ctrl;
2286 u8 i;
2287 int err = 0;
2288
2289 if (!s->set_ctrl)
2290 return -EINVAL;
2291
2292 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2293 return -EFAULT;
2294
2295 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2296 if (ctrl.id == s->qctrl[i].id) {
2297 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
2298 return -EINVAL;
2299 if (ctrl.value < s->qctrl[i].minimum ||
2300 ctrl.value > s->qctrl[i].maximum)
2301 return -ERANGE;
2302 ctrl.value -= ctrl.value % s->qctrl[i].step;
2303 break;
2304 }
2305
2306 if ((err = s->set_ctrl(cam, &ctrl)))
2307 return err;
2308
2309 s->_qctrl[i].default_value = ctrl.value;
2310
2311 PDBGG("VIDIOC_S_CTRL: id %lu, value %lu",
2312 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2313
2314 return 0;
2315 }
2316
2317
2318 static int
sn9c102_vidioc_cropcap(struct sn9c102_device * cam,void __user * arg)2319 sn9c102_vidioc_cropcap(struct sn9c102_device* cam, void __user * arg)
2320 {
2321 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
2322
2323 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2324 cc->pixelaspect.numerator = 1;
2325 cc->pixelaspect.denominator = 1;
2326
2327 if (copy_to_user(arg, cc, sizeof(*cc)))
2328 return -EFAULT;
2329
2330 return 0;
2331 }
2332
2333
2334 static int
sn9c102_vidioc_g_crop(struct sn9c102_device * cam,void __user * arg)2335 sn9c102_vidioc_g_crop(struct sn9c102_device* cam, void __user * arg)
2336 {
2337 struct sn9c102_sensor* s = &cam->sensor;
2338 struct v4l2_crop crop = {
2339 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2340 };
2341
2342 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
2343
2344 if (copy_to_user(arg, &crop, sizeof(crop)))
2345 return -EFAULT;
2346
2347 return 0;
2348 }
2349
2350
2351 static int
sn9c102_vidioc_s_crop(struct sn9c102_device * cam,void __user * arg)2352 sn9c102_vidioc_s_crop(struct sn9c102_device* cam, void __user * arg)
2353 {
2354 struct sn9c102_sensor* s = &cam->sensor;
2355 struct v4l2_crop crop;
2356 struct v4l2_rect* rect;
2357 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2358 struct v4l2_pix_format* pix_format = &(s->pix_format);
2359 u8 scale;
2360 const enum sn9c102_stream_state stream = cam->stream;
2361 const u32 nbuffers = cam->nbuffers;
2362 u32 i;
2363 int err = 0;
2364
2365 if (copy_from_user(&crop, arg, sizeof(crop)))
2366 return -EFAULT;
2367
2368 rect = &(crop.c);
2369
2370 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2371 return -EINVAL;
2372
2373 if (cam->module_param.force_munmap)
2374 for (i = 0; i < cam->nbuffers; i++)
2375 if (cam->frame[i].vma_use_count) {
2376 DBG(3, "VIDIOC_S_CROP failed. "
2377 "Unmap the buffers first.");
2378 return -EBUSY;
2379 }
2380
2381 /* Preserve R,G or B origin */
2382 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
2383 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
2384
2385 if (rect->width < 16)
2386 rect->width = 16;
2387 if (rect->height < 16)
2388 rect->height = 16;
2389 if (rect->width > bounds->width)
2390 rect->width = bounds->width;
2391 if (rect->height > bounds->height)
2392 rect->height = bounds->height;
2393 if (rect->left < bounds->left)
2394 rect->left = bounds->left;
2395 if (rect->top < bounds->top)
2396 rect->top = bounds->top;
2397 if (rect->left + rect->width > bounds->left + bounds->width)
2398 rect->left = bounds->left+bounds->width - rect->width;
2399 if (rect->top + rect->height > bounds->top + bounds->height)
2400 rect->top = bounds->top+bounds->height - rect->height;
2401
2402 rect->width &= ~15L;
2403 rect->height &= ~15L;
2404
2405 if (SN9C102_PRESERVE_IMGSCALE) {
2406 /* Calculate the actual scaling factor */
2407 u32 a, b;
2408 a = rect->width * rect->height;
2409 b = pix_format->width * pix_format->height;
2410 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2411 } else
2412 scale = 1;
2413
2414 if (cam->stream == STREAM_ON)
2415 if ((err = sn9c102_stream_interrupt(cam)))
2416 return err;
2417
2418 if (copy_to_user(arg, &crop, sizeof(crop))) {
2419 cam->stream = stream;
2420 return -EFAULT;
2421 }
2422
2423 if (cam->module_param.force_munmap || cam->io == IO_READ)
2424 sn9c102_release_buffers(cam);
2425
2426 err = sn9c102_set_crop(cam, rect);
2427 if (s->set_crop)
2428 err += s->set_crop(cam, rect);
2429 err += sn9c102_set_scale(cam, scale);
2430
2431 if (err) { /* atomic, no rollback in ioctl() */
2432 cam->state |= DEV_MISCONFIGURED;
2433 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
2434 "use the camera, close and open /dev/video%d again.",
2435 cam->v4ldev->num);
2436 return -EIO;
2437 }
2438
2439 s->pix_format.width = rect->width/scale;
2440 s->pix_format.height = rect->height/scale;
2441 memcpy(&(s->_rect), rect, sizeof(*rect));
2442
2443 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2444 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2445 cam->state |= DEV_MISCONFIGURED;
2446 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
2447 "use the camera, close and open /dev/video%d again.",
2448 cam->v4ldev->num);
2449 return -ENOMEM;
2450 }
2451
2452 if (cam->io == IO_READ)
2453 sn9c102_empty_framequeues(cam);
2454 else if (cam->module_param.force_munmap)
2455 sn9c102_requeue_outqueue(cam);
2456
2457 cam->stream = stream;
2458
2459 return 0;
2460 }
2461
2462
2463 static int
sn9c102_vidioc_enum_framesizes(struct sn9c102_device * cam,void __user * arg)2464 sn9c102_vidioc_enum_framesizes(struct sn9c102_device* cam, void __user * arg)
2465 {
2466 struct v4l2_frmsizeenum frmsize;
2467
2468 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
2469 return -EFAULT;
2470
2471 if (frmsize.index != 0)
2472 return -EINVAL;
2473
2474 switch (cam->bridge) {
2475 case BRIDGE_SN9C101:
2476 case BRIDGE_SN9C102:
2477 case BRIDGE_SN9C103:
2478 if (frmsize.pixel_format != V4L2_PIX_FMT_SN9C10X &&
2479 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2480 return -EINVAL;
2481 case BRIDGE_SN9C105:
2482 case BRIDGE_SN9C120:
2483 if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG &&
2484 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2485 return -EINVAL;
2486 }
2487
2488 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
2489 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
2490 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
2491 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
2492 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
2493 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
2494
2495 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
2496 return -EFAULT;
2497
2498 return 0;
2499 }
2500
2501
2502 static int
sn9c102_vidioc_enum_fmt(struct sn9c102_device * cam,void __user * arg)2503 sn9c102_vidioc_enum_fmt(struct sn9c102_device* cam, void __user * arg)
2504 {
2505 struct v4l2_fmtdesc fmtd;
2506
2507 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
2508 return -EFAULT;
2509
2510 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2511 return -EINVAL;
2512
2513 if (fmtd.index == 0) {
2514 strcpy(fmtd.description, "bayer rgb");
2515 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
2516 } else if (fmtd.index == 1) {
2517 switch (cam->bridge) {
2518 case BRIDGE_SN9C101:
2519 case BRIDGE_SN9C102:
2520 case BRIDGE_SN9C103:
2521 strcpy(fmtd.description, "compressed");
2522 fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X;
2523 break;
2524 case BRIDGE_SN9C105:
2525 case BRIDGE_SN9C120:
2526 strcpy(fmtd.description, "JPEG");
2527 fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
2528 break;
2529 }
2530 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
2531 } else
2532 return -EINVAL;
2533
2534 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2535 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
2536
2537 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
2538 return -EFAULT;
2539
2540 return 0;
2541 }
2542
2543
2544 static int
sn9c102_vidioc_g_fmt(struct sn9c102_device * cam,void __user * arg)2545 sn9c102_vidioc_g_fmt(struct sn9c102_device* cam, void __user * arg)
2546 {
2547 struct v4l2_format format;
2548 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
2549
2550 if (copy_from_user(&format, arg, sizeof(format)))
2551 return -EFAULT;
2552
2553 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2554 return -EINVAL;
2555
2556 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_JPEG) ?
2557 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2558 pfmt->bytesperline = (pfmt->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2559 pfmt->pixelformat == V4L2_PIX_FMT_JPEG)
2560 ? 0 : (pfmt->width * pfmt->priv) / 8;
2561 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
2562 pfmt->field = V4L2_FIELD_NONE;
2563 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
2564
2565 if (copy_to_user(arg, &format, sizeof(format)))
2566 return -EFAULT;
2567
2568 return 0;
2569 }
2570
2571
2572 static int
sn9c102_vidioc_try_s_fmt(struct sn9c102_device * cam,unsigned int cmd,void __user * arg)2573 sn9c102_vidioc_try_s_fmt(struct sn9c102_device* cam, unsigned int cmd,
2574 void __user * arg)
2575 {
2576 struct sn9c102_sensor* s = &cam->sensor;
2577 struct v4l2_format format;
2578 struct v4l2_pix_format* pix;
2579 struct v4l2_pix_format* pfmt = &(s->pix_format);
2580 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2581 struct v4l2_rect rect;
2582 u8 scale;
2583 const enum sn9c102_stream_state stream = cam->stream;
2584 const u32 nbuffers = cam->nbuffers;
2585 u32 i;
2586 int err = 0;
2587
2588 if (copy_from_user(&format, arg, sizeof(format)))
2589 return -EFAULT;
2590
2591 pix = &(format.fmt.pix);
2592
2593 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2594 return -EINVAL;
2595
2596 memcpy(&rect, &(s->_rect), sizeof(rect));
2597
2598 { /* calculate the actual scaling factor */
2599 u32 a, b;
2600 a = rect.width * rect.height;
2601 b = pix->width * pix->height;
2602 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2603 }
2604
2605 rect.width = scale * pix->width;
2606 rect.height = scale * pix->height;
2607
2608 if (rect.width < 16)
2609 rect.width = 16;
2610 if (rect.height < 16)
2611 rect.height = 16;
2612 if (rect.width > bounds->left + bounds->width - rect.left)
2613 rect.width = bounds->left + bounds->width - rect.left;
2614 if (rect.height > bounds->top + bounds->height - rect.top)
2615 rect.height = bounds->top + bounds->height - rect.top;
2616
2617 rect.width &= ~15L;
2618 rect.height &= ~15L;
2619
2620 { /* adjust the scaling factor */
2621 u32 a, b;
2622 a = rect.width * rect.height;
2623 b = pix->width * pix->height;
2624 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2625 }
2626
2627 pix->width = rect.width / scale;
2628 pix->height = rect.height / scale;
2629
2630 switch (cam->bridge) {
2631 case BRIDGE_SN9C101:
2632 case BRIDGE_SN9C102:
2633 case BRIDGE_SN9C103:
2634 if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X &&
2635 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2636 pix->pixelformat = pfmt->pixelformat;
2637 break;
2638 case BRIDGE_SN9C105:
2639 case BRIDGE_SN9C120:
2640 if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
2641 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2642 pix->pixelformat = pfmt->pixelformat;
2643 break;
2644 }
2645 pix->priv = pfmt->priv; /* bpp */
2646 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_JPEG) ?
2647 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2648 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2649 pix->pixelformat == V4L2_PIX_FMT_JPEG)
2650 ? 0 : (pix->width * pix->priv) / 8;
2651 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2652 pix->field = V4L2_FIELD_NONE;
2653
2654 if (cmd == VIDIOC_TRY_FMT) {
2655 if (copy_to_user(arg, &format, sizeof(format)))
2656 return -EFAULT;
2657 return 0;
2658 }
2659
2660 if (cam->module_param.force_munmap)
2661 for (i = 0; i < cam->nbuffers; i++)
2662 if (cam->frame[i].vma_use_count) {
2663 DBG(3, "VIDIOC_S_FMT failed. Unmap the "
2664 "buffers first.");
2665 return -EBUSY;
2666 }
2667
2668 if (cam->stream == STREAM_ON)
2669 if ((err = sn9c102_stream_interrupt(cam)))
2670 return err;
2671
2672 if (copy_to_user(arg, &format, sizeof(format))) {
2673 cam->stream = stream;
2674 return -EFAULT;
2675 }
2676
2677 if (cam->module_param.force_munmap || cam->io == IO_READ)
2678 sn9c102_release_buffers(cam);
2679
2680 err += sn9c102_set_pix_format(cam, pix);
2681 err += sn9c102_set_crop(cam, &rect);
2682 if (s->set_pix_format)
2683 err += s->set_pix_format(cam, pix);
2684 if (s->set_crop)
2685 err += s->set_crop(cam, &rect);
2686 err += sn9c102_set_scale(cam, scale);
2687
2688 if (err) { /* atomic, no rollback in ioctl() */
2689 cam->state |= DEV_MISCONFIGURED;
2690 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2691 "use the camera, close and open /dev/video%d again.",
2692 cam->v4ldev->num);
2693 return -EIO;
2694 }
2695
2696 memcpy(pfmt, pix, sizeof(*pix));
2697 memcpy(&(s->_rect), &rect, sizeof(rect));
2698
2699 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2700 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2701 cam->state |= DEV_MISCONFIGURED;
2702 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2703 "use the camera, close and open /dev/video%d again.",
2704 cam->v4ldev->num);
2705 return -ENOMEM;
2706 }
2707
2708 if (cam->io == IO_READ)
2709 sn9c102_empty_framequeues(cam);
2710 else if (cam->module_param.force_munmap)
2711 sn9c102_requeue_outqueue(cam);
2712
2713 cam->stream = stream;
2714
2715 return 0;
2716 }
2717
2718
2719 static int
sn9c102_vidioc_g_jpegcomp(struct sn9c102_device * cam,void __user * arg)2720 sn9c102_vidioc_g_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2721 {
2722 if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
2723 return -EFAULT;
2724
2725 return 0;
2726 }
2727
2728
2729 static int
sn9c102_vidioc_s_jpegcomp(struct sn9c102_device * cam,void __user * arg)2730 sn9c102_vidioc_s_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2731 {
2732 struct v4l2_jpegcompression jc;
2733 const enum sn9c102_stream_state stream = cam->stream;
2734 int err = 0;
2735
2736 if (copy_from_user(&jc, arg, sizeof(jc)))
2737 return -EFAULT;
2738
2739 if (jc.quality != 0 && jc.quality != 1)
2740 return -EINVAL;
2741
2742 if (cam->stream == STREAM_ON)
2743 if ((err = sn9c102_stream_interrupt(cam)))
2744 return err;
2745
2746 err += sn9c102_set_compression(cam, &jc);
2747 if (err) { /* atomic, no rollback in ioctl() */
2748 cam->state |= DEV_MISCONFIGURED;
2749 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2750 "problems. To use the camera, close and open "
2751 "/dev/video%d again.", cam->v4ldev->num);
2752 return -EIO;
2753 }
2754
2755 cam->compression.quality = jc.quality;
2756
2757 cam->stream = stream;
2758
2759 return 0;
2760 }
2761
2762
2763 static int
sn9c102_vidioc_reqbufs(struct sn9c102_device * cam,void __user * arg)2764 sn9c102_vidioc_reqbufs(struct sn9c102_device* cam, void __user * arg)
2765 {
2766 struct v4l2_requestbuffers rb;
2767 u32 i;
2768 int err;
2769
2770 if (copy_from_user(&rb, arg, sizeof(rb)))
2771 return -EFAULT;
2772
2773 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2774 rb.memory != V4L2_MEMORY_MMAP)
2775 return -EINVAL;
2776
2777 if (cam->io == IO_READ) {
2778 DBG(3, "Close and open the device again to choose the mmap "
2779 "I/O method");
2780 return -EBUSY;
2781 }
2782
2783 for (i = 0; i < cam->nbuffers; i++)
2784 if (cam->frame[i].vma_use_count) {
2785 DBG(3, "VIDIOC_REQBUFS failed. Previous buffers are "
2786 "still mapped.");
2787 return -EBUSY;
2788 }
2789
2790 if (cam->stream == STREAM_ON)
2791 if ((err = sn9c102_stream_interrupt(cam)))
2792 return err;
2793
2794 sn9c102_empty_framequeues(cam);
2795
2796 sn9c102_release_buffers(cam);
2797 if (rb.count)
2798 rb.count = sn9c102_request_buffers(cam, rb.count, IO_MMAP);
2799
2800 if (copy_to_user(arg, &rb, sizeof(rb))) {
2801 sn9c102_release_buffers(cam);
2802 cam->io = IO_NONE;
2803 return -EFAULT;
2804 }
2805
2806 cam->io = rb.count ? IO_MMAP : IO_NONE;
2807
2808 return 0;
2809 }
2810
2811
2812 static int
sn9c102_vidioc_querybuf(struct sn9c102_device * cam,void __user * arg)2813 sn9c102_vidioc_querybuf(struct sn9c102_device* cam, void __user * arg)
2814 {
2815 struct v4l2_buffer b;
2816
2817 if (copy_from_user(&b, arg, sizeof(b)))
2818 return -EFAULT;
2819
2820 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2821 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2822 return -EINVAL;
2823
2824 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2825
2826 if (cam->frame[b.index].vma_use_count)
2827 b.flags |= V4L2_BUF_FLAG_MAPPED;
2828
2829 if (cam->frame[b.index].state == F_DONE)
2830 b.flags |= V4L2_BUF_FLAG_DONE;
2831 else if (cam->frame[b.index].state != F_UNUSED)
2832 b.flags |= V4L2_BUF_FLAG_QUEUED;
2833
2834 if (copy_to_user(arg, &b, sizeof(b)))
2835 return -EFAULT;
2836
2837 return 0;
2838 }
2839
2840
2841 static int
sn9c102_vidioc_qbuf(struct sn9c102_device * cam,void __user * arg)2842 sn9c102_vidioc_qbuf(struct sn9c102_device* cam, void __user * arg)
2843 {
2844 struct v4l2_buffer b;
2845 unsigned long lock_flags;
2846
2847 if (copy_from_user(&b, arg, sizeof(b)))
2848 return -EFAULT;
2849
2850 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2851 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2852 return -EINVAL;
2853
2854 if (cam->frame[b.index].state != F_UNUSED)
2855 return -EINVAL;
2856
2857 cam->frame[b.index].state = F_QUEUED;
2858
2859 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2860 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2861 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2862
2863 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2864
2865 return 0;
2866 }
2867
2868
2869 static int
sn9c102_vidioc_dqbuf(struct sn9c102_device * cam,struct file * filp,void __user * arg)2870 sn9c102_vidioc_dqbuf(struct sn9c102_device* cam, struct file* filp,
2871 void __user * arg)
2872 {
2873 struct v4l2_buffer b;
2874 struct sn9c102_frame_t *f;
2875 unsigned long lock_flags;
2876 long timeout;
2877 int err = 0;
2878
2879 if (copy_from_user(&b, arg, sizeof(b)))
2880 return -EFAULT;
2881
2882 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2883 return -EINVAL;
2884
2885 if (list_empty(&cam->outqueue)) {
2886 if (cam->stream == STREAM_OFF)
2887 return -EINVAL;
2888 if (filp->f_flags & O_NONBLOCK)
2889 return -EAGAIN;
2890 if (!cam->module_param.frame_timeout) {
2891 err = wait_event_interruptible
2892 ( cam->wait_frame,
2893 (!list_empty(&cam->outqueue)) ||
2894 (cam->state & DEV_DISCONNECTED) ||
2895 (cam->state & DEV_MISCONFIGURED) );
2896 if (err)
2897 return err;
2898 } else {
2899 timeout = wait_event_interruptible_timeout
2900 ( cam->wait_frame,
2901 (!list_empty(&cam->outqueue)) ||
2902 (cam->state & DEV_DISCONNECTED) ||
2903 (cam->state & DEV_MISCONFIGURED),
2904 cam->module_param.frame_timeout *
2905 1000 * msecs_to_jiffies(1) );
2906 if (timeout < 0)
2907 return timeout;
2908 else if (timeout == 0 &&
2909 !(cam->state & DEV_DISCONNECTED)) {
2910 DBG(1, "Video frame timeout elapsed");
2911 return -EIO;
2912 }
2913 }
2914 if (cam->state & DEV_DISCONNECTED)
2915 return -ENODEV;
2916 if (cam->state & DEV_MISCONFIGURED)
2917 return -EIO;
2918 }
2919
2920 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2921 f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, frame);
2922 list_del(cam->outqueue.next);
2923 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2924
2925 f->state = F_UNUSED;
2926
2927 memcpy(&b, &f->buf, sizeof(b));
2928 if (f->vma_use_count)
2929 b.flags |= V4L2_BUF_FLAG_MAPPED;
2930
2931 if (copy_to_user(arg, &b, sizeof(b)))
2932 return -EFAULT;
2933
2934 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2935
2936 return 0;
2937 }
2938
2939
2940 static int
sn9c102_vidioc_streamon(struct sn9c102_device * cam,void __user * arg)2941 sn9c102_vidioc_streamon(struct sn9c102_device* cam, void __user * arg)
2942 {
2943 int type;
2944
2945 if (copy_from_user(&type, arg, sizeof(type)))
2946 return -EFAULT;
2947
2948 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2949 return -EINVAL;
2950
2951 cam->stream = STREAM_ON;
2952
2953 DBG(3, "Stream on");
2954
2955 return 0;
2956 }
2957
2958
2959 static int
sn9c102_vidioc_streamoff(struct sn9c102_device * cam,void __user * arg)2960 sn9c102_vidioc_streamoff(struct sn9c102_device* cam, void __user * arg)
2961 {
2962 int type, err;
2963
2964 if (copy_from_user(&type, arg, sizeof(type)))
2965 return -EFAULT;
2966
2967 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2968 return -EINVAL;
2969
2970 if (cam->stream == STREAM_ON)
2971 if ((err = sn9c102_stream_interrupt(cam)))
2972 return err;
2973
2974 sn9c102_empty_framequeues(cam);
2975
2976 DBG(3, "Stream off");
2977
2978 return 0;
2979 }
2980
2981
2982 static int
sn9c102_vidioc_g_parm(struct sn9c102_device * cam,void __user * arg)2983 sn9c102_vidioc_g_parm(struct sn9c102_device* cam, void __user * arg)
2984 {
2985 struct v4l2_streamparm sp;
2986
2987 if (copy_from_user(&sp, arg, sizeof(sp)))
2988 return -EFAULT;
2989
2990 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2991 return -EINVAL;
2992
2993 sp.parm.capture.extendedmode = 0;
2994 sp.parm.capture.readbuffers = cam->nreadbuffers;
2995
2996 if (copy_to_user(arg, &sp, sizeof(sp)))
2997 return -EFAULT;
2998
2999 return 0;
3000 }
3001
3002
3003 static int
sn9c102_vidioc_s_parm(struct sn9c102_device * cam,void __user * arg)3004 sn9c102_vidioc_s_parm(struct sn9c102_device* cam, void __user * arg)
3005 {
3006 struct v4l2_streamparm sp;
3007
3008 if (copy_from_user(&sp, arg, sizeof(sp)))
3009 return -EFAULT;
3010
3011 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
3012 return -EINVAL;
3013
3014 sp.parm.capture.extendedmode = 0;
3015
3016 if (sp.parm.capture.readbuffers == 0)
3017 sp.parm.capture.readbuffers = cam->nreadbuffers;
3018
3019 if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES)
3020 sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES;
3021
3022 if (copy_to_user(arg, &sp, sizeof(sp)))
3023 return -EFAULT;
3024
3025 cam->nreadbuffers = sp.parm.capture.readbuffers;
3026
3027 return 0;
3028 }
3029
3030
3031 static int
sn9c102_vidioc_enumaudio(struct sn9c102_device * cam,void __user * arg)3032 sn9c102_vidioc_enumaudio(struct sn9c102_device* cam, void __user * arg)
3033 {
3034 struct v4l2_audio audio;
3035
3036 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3037 return -EINVAL;
3038
3039 if (copy_from_user(&audio, arg, sizeof(audio)))
3040 return -EFAULT;
3041
3042 if (audio.index != 0)
3043 return -EINVAL;
3044
3045 strcpy(audio.name, "Microphone");
3046 audio.capability = 0;
3047 audio.mode = 0;
3048
3049 if (copy_to_user(arg, &audio, sizeof(audio)))
3050 return -EFAULT;
3051
3052 return 0;
3053 }
3054
3055
3056 static int
sn9c102_vidioc_g_audio(struct sn9c102_device * cam,void __user * arg)3057 sn9c102_vidioc_g_audio(struct sn9c102_device* cam, void __user * arg)
3058 {
3059 struct v4l2_audio audio;
3060
3061 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3062 return -EINVAL;
3063
3064 if (copy_from_user(&audio, arg, sizeof(audio)))
3065 return -EFAULT;
3066
3067 memset(&audio, 0, sizeof(audio));
3068 strcpy(audio.name, "Microphone");
3069
3070 if (copy_to_user(arg, &audio, sizeof(audio)))
3071 return -EFAULT;
3072
3073 return 0;
3074 }
3075
3076
3077 static int
sn9c102_vidioc_s_audio(struct sn9c102_device * cam,void __user * arg)3078 sn9c102_vidioc_s_audio(struct sn9c102_device* cam, void __user * arg)
3079 {
3080 struct v4l2_audio audio;
3081
3082 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3083 return -EINVAL;
3084
3085 if (copy_from_user(&audio, arg, sizeof(audio)))
3086 return -EFAULT;
3087
3088 if (audio.index != 0)
3089 return -EINVAL;
3090
3091 return 0;
3092 }
3093
3094
sn9c102_ioctl_v4l2(struct file * filp,unsigned int cmd,void __user * arg)3095 static long sn9c102_ioctl_v4l2(struct file *filp,
3096 unsigned int cmd, void __user *arg)
3097 {
3098 struct sn9c102_device *cam = video_drvdata(filp);
3099
3100 switch (cmd) {
3101
3102 case VIDIOC_QUERYCAP:
3103 return sn9c102_vidioc_querycap(cam, arg);
3104
3105 case VIDIOC_ENUMINPUT:
3106 return sn9c102_vidioc_enuminput(cam, arg);
3107
3108 case VIDIOC_G_INPUT:
3109 return sn9c102_vidioc_g_input(cam, arg);
3110
3111 case VIDIOC_S_INPUT:
3112 return sn9c102_vidioc_s_input(cam, arg);
3113
3114 case VIDIOC_QUERYCTRL:
3115 return sn9c102_vidioc_query_ctrl(cam, arg);
3116
3117 case VIDIOC_G_CTRL:
3118 return sn9c102_vidioc_g_ctrl(cam, arg);
3119
3120 case VIDIOC_S_CTRL:
3121 return sn9c102_vidioc_s_ctrl(cam, arg);
3122
3123 case VIDIOC_CROPCAP:
3124 return sn9c102_vidioc_cropcap(cam, arg);
3125
3126 case VIDIOC_G_CROP:
3127 return sn9c102_vidioc_g_crop(cam, arg);
3128
3129 case VIDIOC_S_CROP:
3130 return sn9c102_vidioc_s_crop(cam, arg);
3131
3132 case VIDIOC_ENUM_FRAMESIZES:
3133 return sn9c102_vidioc_enum_framesizes(cam, arg);
3134
3135 case VIDIOC_ENUM_FMT:
3136 return sn9c102_vidioc_enum_fmt(cam, arg);
3137
3138 case VIDIOC_G_FMT:
3139 return sn9c102_vidioc_g_fmt(cam, arg);
3140
3141 case VIDIOC_TRY_FMT:
3142 case VIDIOC_S_FMT:
3143 return sn9c102_vidioc_try_s_fmt(cam, cmd, arg);
3144
3145 case VIDIOC_G_JPEGCOMP:
3146 return sn9c102_vidioc_g_jpegcomp(cam, arg);
3147
3148 case VIDIOC_S_JPEGCOMP:
3149 return sn9c102_vidioc_s_jpegcomp(cam, arg);
3150
3151 case VIDIOC_REQBUFS:
3152 return sn9c102_vidioc_reqbufs(cam, arg);
3153
3154 case VIDIOC_QUERYBUF:
3155 return sn9c102_vidioc_querybuf(cam, arg);
3156
3157 case VIDIOC_QBUF:
3158 return sn9c102_vidioc_qbuf(cam, arg);
3159
3160 case VIDIOC_DQBUF:
3161 return sn9c102_vidioc_dqbuf(cam, filp, arg);
3162
3163 case VIDIOC_STREAMON:
3164 return sn9c102_vidioc_streamon(cam, arg);
3165
3166 case VIDIOC_STREAMOFF:
3167 return sn9c102_vidioc_streamoff(cam, arg);
3168
3169 case VIDIOC_G_PARM:
3170 return sn9c102_vidioc_g_parm(cam, arg);
3171
3172 case VIDIOC_S_PARM:
3173 return sn9c102_vidioc_s_parm(cam, arg);
3174
3175 case VIDIOC_ENUMAUDIO:
3176 return sn9c102_vidioc_enumaudio(cam, arg);
3177
3178 case VIDIOC_G_AUDIO:
3179 return sn9c102_vidioc_g_audio(cam, arg);
3180
3181 case VIDIOC_S_AUDIO:
3182 return sn9c102_vidioc_s_audio(cam, arg);
3183
3184 case VIDIOC_G_STD:
3185 case VIDIOC_S_STD:
3186 case VIDIOC_QUERYSTD:
3187 case VIDIOC_ENUMSTD:
3188 case VIDIOC_QUERYMENU:
3189 case VIDIOC_ENUM_FRAMEINTERVALS:
3190 return -EINVAL;
3191
3192 default:
3193 return -EINVAL;
3194
3195 }
3196 }
3197
3198
sn9c102_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)3199 static long sn9c102_ioctl(struct file *filp,
3200 unsigned int cmd, unsigned long arg)
3201 {
3202 struct sn9c102_device *cam = video_drvdata(filp);
3203 int err = 0;
3204
3205 if (mutex_lock_interruptible(&cam->fileop_mutex))
3206 return -ERESTARTSYS;
3207
3208 if (cam->state & DEV_DISCONNECTED) {
3209 DBG(1, "Device not present");
3210 mutex_unlock(&cam->fileop_mutex);
3211 return -ENODEV;
3212 }
3213
3214 if (cam->state & DEV_MISCONFIGURED) {
3215 DBG(1, "The camera is misconfigured. Close and open it "
3216 "again.");
3217 mutex_unlock(&cam->fileop_mutex);
3218 return -EIO;
3219 }
3220
3221 V4LDBG(3, "sn9c102", cmd);
3222
3223 err = sn9c102_ioctl_v4l2(filp, cmd, (void __user *)arg);
3224
3225 mutex_unlock(&cam->fileop_mutex);
3226
3227 return err;
3228 }
3229
3230 /*****************************************************************************/
3231
3232 static const struct v4l2_file_operations sn9c102_fops = {
3233 .owner = THIS_MODULE,
3234 .open = sn9c102_open,
3235 .release = sn9c102_release,
3236 .ioctl = sn9c102_ioctl,
3237 .read = sn9c102_read,
3238 .poll = sn9c102_poll,
3239 .mmap = sn9c102_mmap,
3240 };
3241
3242 /*****************************************************************************/
3243
3244 /* It exists a single interface only. We do not need to validate anything. */
3245 static int
sn9c102_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)3246 sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3247 {
3248 struct usb_device *udev = interface_to_usbdev(intf);
3249 struct sn9c102_device* cam;
3250 static unsigned int dev_nr;
3251 unsigned int i;
3252 int err = 0, r;
3253
3254 if (!(cam = kzalloc(sizeof(struct sn9c102_device), GFP_KERNEL)))
3255 return -ENOMEM;
3256
3257 cam->usbdev = udev;
3258
3259 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
3260 DBG(1, "kzalloc() failed");
3261 err = -ENOMEM;
3262 goto fail;
3263 }
3264
3265 if (!(cam->v4ldev = video_device_alloc())) {
3266 DBG(1, "video_device_alloc() failed");
3267 err = -ENOMEM;
3268 goto fail;
3269 }
3270
3271 r = sn9c102_read_reg(cam, 0x00);
3272 if (r < 0 || (r != 0x10 && r != 0x11 && r != 0x12)) {
3273 DBG(1, "Sorry, this is not a SN9C1xx-based camera "
3274 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3275 err = -ENODEV;
3276 goto fail;
3277 }
3278
3279 cam->bridge = id->driver_info;
3280 switch (cam->bridge) {
3281 case BRIDGE_SN9C101:
3282 case BRIDGE_SN9C102:
3283 DBG(2, "SN9C10[12] PC Camera Controller detected "
3284 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3285 break;
3286 case BRIDGE_SN9C103:
3287 DBG(2, "SN9C103 PC Camera Controller detected "
3288 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3289 break;
3290 case BRIDGE_SN9C105:
3291 DBG(2, "SN9C105 PC Camera Controller detected "
3292 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3293 break;
3294 case BRIDGE_SN9C120:
3295 DBG(2, "SN9C120 PC Camera Controller detected "
3296 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3297 break;
3298 }
3299
3300 for (i = 0; i < ARRAY_SIZE(sn9c102_sensor_table); i++) {
3301 err = sn9c102_sensor_table[i](cam);
3302 if (!err)
3303 break;
3304 }
3305
3306 if (!err) {
3307 DBG(2, "%s image sensor detected", cam->sensor.name);
3308 DBG(3, "Support for %s maintained by %s",
3309 cam->sensor.name, cam->sensor.maintainer);
3310 } else {
3311 DBG(1, "No supported image sensor detected for this bridge");
3312 err = -ENODEV;
3313 goto fail;
3314 }
3315
3316 if (!(cam->bridge & cam->sensor.supported_bridge)) {
3317 DBG(1, "Bridge not supported");
3318 err = -ENODEV;
3319 goto fail;
3320 }
3321
3322 if (sn9c102_init(cam)) {
3323 DBG(1, "Initialization failed. I will retry on open().");
3324 cam->state |= DEV_MISCONFIGURED;
3325 }
3326
3327 strcpy(cam->v4ldev->name, "SN9C1xx PC Camera");
3328 cam->v4ldev->fops = &sn9c102_fops;
3329 cam->v4ldev->minor = video_nr[dev_nr];
3330 cam->v4ldev->release = video_device_release;
3331 cam->v4ldev->parent = &udev->dev;
3332
3333 init_completion(&cam->probe);
3334
3335 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
3336 video_nr[dev_nr]);
3337 if (err) {
3338 DBG(1, "V4L2 device registration failed");
3339 if (err == -ENFILE && video_nr[dev_nr] == -1)
3340 DBG(1, "Free /dev/videoX node not found");
3341 video_nr[dev_nr] = -1;
3342 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3343 complete_all(&cam->probe);
3344 goto fail;
3345 }
3346
3347 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->num);
3348
3349 video_set_drvdata(cam->v4ldev, cam);
3350 cam->module_param.force_munmap = force_munmap[dev_nr];
3351 cam->module_param.frame_timeout = frame_timeout[dev_nr];
3352
3353 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3354
3355 #ifdef CONFIG_VIDEO_ADV_DEBUG
3356 err = sn9c102_create_sysfs(cam);
3357 if (!err)
3358 DBG(2, "Optional device control through 'sysfs' "
3359 "interface ready");
3360 else
3361 DBG(2, "Failed to create optional 'sysfs' interface for "
3362 "device controlling. Error #%d", err);
3363 #else
3364 DBG(2, "Optional device control through 'sysfs' interface disabled");
3365 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
3366 "configuration option to enable it.");
3367 #endif
3368
3369 usb_set_intfdata(intf, cam);
3370 kref_init(&cam->kref);
3371 usb_get_dev(cam->usbdev);
3372
3373 complete_all(&cam->probe);
3374
3375 return 0;
3376
3377 fail:
3378 if (cam) {
3379 kfree(cam->control_buffer);
3380 if (cam->v4ldev)
3381 video_device_release(cam->v4ldev);
3382 kfree(cam);
3383 }
3384 return err;
3385 }
3386
3387
sn9c102_usb_disconnect(struct usb_interface * intf)3388 static void sn9c102_usb_disconnect(struct usb_interface* intf)
3389 {
3390 struct sn9c102_device* cam;
3391
3392 down_write(&sn9c102_dev_lock);
3393
3394 cam = usb_get_intfdata(intf);
3395
3396 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
3397
3398 if (cam->users) {
3399 DBG(2, "Device /dev/video%d is open! Deregistration and "
3400 "memory deallocation are deferred.",
3401 cam->v4ldev->num);
3402 cam->state |= DEV_MISCONFIGURED;
3403 sn9c102_stop_transfer(cam);
3404 cam->state |= DEV_DISCONNECTED;
3405 wake_up_interruptible(&cam->wait_frame);
3406 wake_up(&cam->wait_stream);
3407 } else
3408 cam->state |= DEV_DISCONNECTED;
3409
3410 wake_up_interruptible_all(&cam->wait_open);
3411
3412 kref_put(&cam->kref, sn9c102_release_resources);
3413
3414 up_write(&sn9c102_dev_lock);
3415 }
3416
3417
3418 static struct usb_driver sn9c102_usb_driver = {
3419 .name = "sn9c102",
3420 .id_table = sn9c102_id_table,
3421 .probe = sn9c102_usb_probe,
3422 .disconnect = sn9c102_usb_disconnect,
3423 };
3424
3425 /*****************************************************************************/
3426
sn9c102_module_init(void)3427 static int __init sn9c102_module_init(void)
3428 {
3429 int err = 0;
3430
3431 KDBG(2, SN9C102_MODULE_NAME " v" SN9C102_MODULE_VERSION);
3432 KDBG(3, SN9C102_MODULE_AUTHOR);
3433
3434 if ((err = usb_register(&sn9c102_usb_driver)))
3435 KDBG(1, "usb_register() failed");
3436
3437 return err;
3438 }
3439
3440
sn9c102_module_exit(void)3441 static void __exit sn9c102_module_exit(void)
3442 {
3443 usb_deregister(&sn9c102_usb_driver);
3444 }
3445
3446
3447 module_init(sn9c102_module_init);
3448 module_exit(sn9c102_module_exit);
3449