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1da177e4 LT |
1 | /*************************************************************************** |
2 | * V4L2 driver for SN9C10x PC Camera Controllers * | |
3 | * * | |
4 | * Copyright (C) 2004-2005 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/moduleparam.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/device.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/stddef.h> | |
33 | #include <linux/compiler.h> | |
34 | #include <linux/ioctl.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/stat.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/vmalloc.h> | |
39 | #include <linux/page-flags.h> | |
40 | #include <linux/byteorder/generic.h> | |
41 | #include <asm/page.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
44 | #include "sn9c102.h" | |
45 | ||
46 | /*****************************************************************************/ | |
47 | ||
48 | MODULE_DEVICE_TABLE(usb, sn9c102_id_table); | |
49 | ||
50 | MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL); | |
51 | MODULE_DESCRIPTION(SN9C102_MODULE_NAME); | |
52 | MODULE_VERSION(SN9C102_MODULE_VERSION); | |
53 | MODULE_LICENSE(SN9C102_MODULE_LICENSE); | |
54 | ||
55 | static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1}; | |
56 | module_param_array(video_nr, short, NULL, 0444); | |
57 | MODULE_PARM_DESC(video_nr, | |
58 | "\n<-1|n[,...]> Specify V4L2 minor mode number." | |
59 | "\n -1 = use next available (default)" | |
60 | "\n n = use minor number n (integer >= 0)" | |
61 | "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES) | |
62 | " cameras this way." | |
63 | "\nFor example:" | |
64 | "\nvideo_nr=-1,2,-1 would assign minor number 2 to" | |
65 | "\nthe second camera and use auto for the first" | |
66 | "\none and for every other camera." | |
67 | "\n"); | |
68 | ||
69 | static short force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] = | |
70 | SN9C102_FORCE_MUNMAP}; | |
71 | module_param_array(force_munmap, bool, NULL, 0444); | |
72 | MODULE_PARM_DESC(force_munmap, | |
73 | "\n<0|1[,...]> Force the application to unmap previously " | |
74 | "\nmapped buffer memory before calling any VIDIOC_S_CROP or " | |
75 | "\nVIDIOC_S_FMT ioctl's. Not all the applications support " | |
76 | "\nthis feature. This parameter is specific for each " | |
77 | "\ndetected camera." | |
78 | "\n 0 = do not force memory unmapping" | |
79 | "\n 1 = force memory unmapping (save memory)" | |
80 | "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"." | |
81 | "\n"); | |
82 | ||
83 | #ifdef SN9C102_DEBUG | |
84 | static unsigned short debug = SN9C102_DEBUG_LEVEL; | |
85 | module_param(debug, ushort, 0644); | |
86 | MODULE_PARM_DESC(debug, | |
87 | "\n<n> Debugging information level, from 0 to 3:" | |
88 | "\n0 = none (use carefully)" | |
89 | "\n1 = critical errors" | |
90 | "\n2 = significant informations" | |
91 | "\n3 = more verbose messages" | |
92 | "\nLevel 3 is useful for testing only, when only " | |
93 | "one device is used." | |
94 | "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"." | |
95 | "\n"); | |
96 | #endif | |
97 | ||
98 | /*****************************************************************************/ | |
99 | ||
100 | static sn9c102_sof_header_t sn9c102_sof_header[] = { | |
101 | {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x00}, | |
102 | {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x01}, | |
103 | }; | |
104 | ||
105 | ||
106 | static sn9c102_eof_header_t sn9c102_eof_header[] = { | |
107 | {0x00, 0x00, 0x00, 0x00}, | |
108 | {0x40, 0x00, 0x00, 0x00}, | |
109 | {0x80, 0x00, 0x00, 0x00}, | |
110 | {0xc0, 0x00, 0x00, 0x00}, | |
111 | }; | |
112 | ||
113 | /*****************************************************************************/ | |
114 | ||
115 | static void* rvmalloc(size_t size) | |
116 | { | |
117 | void* mem; | |
118 | unsigned long adr; | |
119 | ||
120 | size = PAGE_ALIGN(size); | |
121 | ||
122 | mem = vmalloc_32((unsigned long)size); | |
123 | if (!mem) | |
124 | return NULL; | |
125 | ||
126 | memset(mem, 0, size); | |
127 | ||
128 | adr = (unsigned long)mem; | |
129 | while (size > 0) { | |
130 | SetPageReserved(vmalloc_to_page((void *)adr)); | |
131 | adr += PAGE_SIZE; | |
132 | size -= PAGE_SIZE; | |
133 | } | |
134 | ||
135 | return mem; | |
136 | } | |
137 | ||
138 | ||
139 | static void rvfree(void* mem, size_t size) | |
140 | { | |
141 | unsigned long adr; | |
142 | ||
143 | if (!mem) | |
144 | return; | |
145 | ||
146 | size = PAGE_ALIGN(size); | |
147 | ||
148 | adr = (unsigned long)mem; | |
149 | while (size > 0) { | |
150 | ClearPageReserved(vmalloc_to_page((void *)adr)); | |
151 | adr += PAGE_SIZE; | |
152 | size -= PAGE_SIZE; | |
153 | } | |
154 | ||
155 | vfree(mem); | |
156 | } | |
157 | ||
158 | ||
159 | static u32 | |
160 | sn9c102_request_buffers(struct sn9c102_device* cam, u32 count, | |
161 | enum sn9c102_io_method io) | |
162 | { | |
163 | struct v4l2_pix_format* p = &(cam->sensor->pix_format); | |
164 | struct v4l2_rect* r = &(cam->sensor->cropcap.bounds); | |
165 | const size_t imagesize = cam->module_param.force_munmap || | |
166 | io == IO_READ ? | |
167 | (p->width * p->height * p->priv) / 8 : | |
168 | (r->width * r->height * p->priv) / 8; | |
169 | void* buff = NULL; | |
170 | u32 i; | |
171 | ||
172 | if (count > SN9C102_MAX_FRAMES) | |
173 | count = SN9C102_MAX_FRAMES; | |
174 | ||
175 | cam->nbuffers = count; | |
176 | while (cam->nbuffers > 0) { | |
177 | if ((buff = rvmalloc(cam->nbuffers * PAGE_ALIGN(imagesize)))) | |
178 | break; | |
179 | cam->nbuffers--; | |
180 | } | |
181 | ||
182 | for (i = 0; i < cam->nbuffers; i++) { | |
183 | cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize); | |
184 | cam->frame[i].buf.index = i; | |
185 | cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize); | |
186 | cam->frame[i].buf.length = imagesize; | |
187 | cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
188 | cam->frame[i].buf.sequence = 0; | |
189 | cam->frame[i].buf.field = V4L2_FIELD_NONE; | |
190 | cam->frame[i].buf.memory = V4L2_MEMORY_MMAP; | |
191 | cam->frame[i].buf.flags = 0; | |
192 | } | |
193 | ||
194 | return cam->nbuffers; | |
195 | } | |
196 | ||
197 | ||
198 | static void sn9c102_release_buffers(struct sn9c102_device* cam) | |
199 | { | |
200 | if (cam->nbuffers) { | |
201 | rvfree(cam->frame[0].bufmem, | |
202 | cam->nbuffers * cam->frame[0].buf.length); | |
203 | cam->nbuffers = 0; | |
204 | } | |
205 | } | |
206 | ||
207 | ||
208 | static void sn9c102_empty_framequeues(struct sn9c102_device* cam) | |
209 | { | |
210 | u32 i; | |
211 | ||
212 | INIT_LIST_HEAD(&cam->inqueue); | |
213 | INIT_LIST_HEAD(&cam->outqueue); | |
214 | ||
215 | for (i = 0; i < SN9C102_MAX_FRAMES; i++) { | |
216 | cam->frame[i].state = F_UNUSED; | |
217 | cam->frame[i].buf.bytesused = 0; | |
218 | } | |
219 | } | |
220 | ||
221 | ||
222 | static void sn9c102_queue_unusedframes(struct sn9c102_device* cam) | |
223 | { | |
224 | unsigned long lock_flags; | |
225 | u32 i; | |
226 | ||
227 | for (i = 0; i < cam->nbuffers; i++) | |
228 | if (cam->frame[i].state == F_UNUSED) { | |
229 | cam->frame[i].state = F_QUEUED; | |
230 | spin_lock_irqsave(&cam->queue_lock, lock_flags); | |
231 | list_add_tail(&cam->frame[i].frame, &cam->inqueue); | |
232 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); | |
233 | } | |
234 | } | |
235 | ||
236 | /*****************************************************************************/ | |
237 | ||
238 | int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index) | |
239 | { | |
240 | struct usb_device* udev = cam->usbdev; | |
241 | u8* buff = cam->control_buffer; | |
242 | int res; | |
243 | ||
244 | *buff = value; | |
245 | ||
246 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, | |
247 | index, 0, buff, 1, SN9C102_CTRL_TIMEOUT); | |
248 | if (res < 0) { | |
249 | DBG(3, "Failed to write a register (value 0x%02X, index " | |
250 | "0x%02X, error %d)", value, index, res) | |
251 | return -1; | |
252 | } | |
253 | ||
254 | cam->reg[index] = value; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | ||
260 | /* NOTE: reading some registers always returns 0 */ | |
261 | static int sn9c102_read_reg(struct sn9c102_device* cam, u16 index) | |
262 | { | |
263 | struct usb_device* udev = cam->usbdev; | |
264 | u8* buff = cam->control_buffer; | |
265 | int res; | |
266 | ||
267 | res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1, | |
268 | index, 0, buff, 1, SN9C102_CTRL_TIMEOUT); | |
269 | if (res < 0) | |
270 | DBG(3, "Failed to read a register (index 0x%02X, error %d)", | |
271 | index, res) | |
272 | ||
273 | return (res >= 0) ? (int)(*buff) : -1; | |
274 | } | |
275 | ||
276 | ||
277 | int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index) | |
278 | { | |
279 | if (index > 0x1f) | |
280 | return -EINVAL; | |
281 | ||
282 | return cam->reg[index]; | |
283 | } | |
284 | ||
285 | ||
286 | static int | |
287 | sn9c102_i2c_wait(struct sn9c102_device* cam, struct sn9c102_sensor* sensor) | |
288 | { | |
289 | int i, r; | |
290 | ||
291 | for (i = 1; i <= 5; i++) { | |
292 | r = sn9c102_read_reg(cam, 0x08); | |
293 | if (r < 0) | |
294 | return -EIO; | |
295 | if (r & 0x04) | |
296 | return 0; | |
297 | if (sensor->frequency & SN9C102_I2C_400KHZ) | |
298 | udelay(5*16); | |
299 | else | |
300 | udelay(16*16); | |
301 | } | |
302 | return -EBUSY; | |
303 | } | |
304 | ||
305 | ||
306 | static int | |
307 | sn9c102_i2c_detect_read_error(struct sn9c102_device* cam, | |
308 | struct sn9c102_sensor* sensor) | |
309 | { | |
310 | int r; | |
311 | r = sn9c102_read_reg(cam, 0x08); | |
312 | return (r < 0 || (r >= 0 && !(r & 0x08))) ? -EIO : 0; | |
313 | } | |
314 | ||
315 | ||
316 | static int | |
317 | sn9c102_i2c_detect_write_error(struct sn9c102_device* cam, | |
318 | struct sn9c102_sensor* sensor) | |
319 | { | |
320 | int r; | |
321 | r = sn9c102_read_reg(cam, 0x08); | |
322 | return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0; | |
323 | } | |
324 | ||
325 | ||
326 | int | |
327 | sn9c102_i2c_try_raw_read(struct sn9c102_device* cam, | |
328 | struct sn9c102_sensor* sensor, u8 data0, u8 data1, | |
329 | u8 n, u8 buffer[]) | |
330 | { | |
331 | struct usb_device* udev = cam->usbdev; | |
332 | u8* data = cam->control_buffer; | |
333 | int err = 0, res; | |
334 | ||
335 | /* Write cycle */ | |
336 | data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | | |
337 | ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10; | |
338 | data[1] = data0; /* I2C slave id */ | |
339 | data[2] = data1; /* address */ | |
340 | data[7] = 0x10; | |
341 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, | |
342 | 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); | |
343 | if (res < 0) | |
344 | err += res; | |
345 | ||
346 | err += sn9c102_i2c_wait(cam, sensor); | |
347 | ||
348 | /* Read cycle - n bytes */ | |
349 | data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | | |
350 | ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | | |
351 | (n << 4) | 0x02; | |
352 | data[1] = data0; | |
353 | data[7] = 0x10; | |
354 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, | |
355 | 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); | |
356 | if (res < 0) | |
357 | err += res; | |
358 | ||
359 | err += sn9c102_i2c_wait(cam, sensor); | |
360 | ||
361 | /* The first read byte will be placed in data[4] */ | |
362 | res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1, | |
363 | 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT); | |
364 | if (res < 0) | |
365 | err += res; | |
366 | ||
367 | err += sn9c102_i2c_detect_read_error(cam, sensor); | |
368 | ||
369 | PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1, | |
370 | data[4]) | |
371 | ||
372 | if (err) { | |
373 | DBG(3, "I2C read failed for %s image sensor", sensor->name) | |
374 | return -1; | |
375 | } | |
376 | ||
377 | if (buffer) | |
378 | memcpy(buffer, data, sizeof(buffer)); | |
379 | ||
380 | return (int)data[4]; | |
381 | } | |
382 | ||
383 | ||
384 | int | |
385 | sn9c102_i2c_try_raw_write(struct sn9c102_device* cam, | |
386 | struct sn9c102_sensor* sensor, u8 n, u8 data0, | |
387 | u8 data1, u8 data2, u8 data3, u8 data4, u8 data5) | |
388 | { | |
389 | struct usb_device* udev = cam->usbdev; | |
390 | u8* data = cam->control_buffer; | |
391 | int err = 0, res; | |
392 | ||
393 | /* Write cycle. It usually is address + value */ | |
394 | data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | | |
395 | ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | |
396 | | ((n - 1) << 4); | |
397 | data[1] = data0; | |
398 | data[2] = data1; | |
399 | data[3] = data2; | |
400 | data[4] = data3; | |
401 | data[5] = data4; | |
402 | data[6] = data5; | |
403 | data[7] = 0x14; | |
404 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, | |
405 | 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); | |
406 | if (res < 0) | |
407 | err += res; | |
408 | ||
409 | err += sn9c102_i2c_wait(cam, sensor); | |
410 | err += sn9c102_i2c_detect_write_error(cam, sensor); | |
411 | ||
412 | if (err) | |
413 | DBG(3, "I2C write failed for %s image sensor", sensor->name) | |
414 | ||
415 | PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, " | |
416 | "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X", | |
417 | n, data0, data1, data2, data3, data4, data5) | |
418 | ||
419 | return err ? -1 : 0; | |
420 | } | |
421 | ||
422 | ||
423 | int | |
424 | sn9c102_i2c_try_read(struct sn9c102_device* cam, | |
425 | struct sn9c102_sensor* sensor, u8 address) | |
426 | { | |
427 | return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id, | |
428 | address, 1, NULL); | |
429 | } | |
430 | ||
431 | ||
7107627b | 432 | static int |
1da177e4 LT |
433 | sn9c102_i2c_try_write(struct sn9c102_device* cam, |
434 | struct sn9c102_sensor* sensor, u8 address, u8 value) | |
435 | { | |
436 | return sn9c102_i2c_try_raw_write(cam, sensor, 3, | |
437 | sensor->i2c_slave_id, address, | |
438 | value, 0, 0, 0); | |
439 | } | |
440 | ||
441 | ||
442 | int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address) | |
443 | { | |
444 | if (!cam->sensor) | |
445 | return -1; | |
446 | ||
447 | return sn9c102_i2c_try_read(cam, cam->sensor, address); | |
448 | } | |
449 | ||
450 | ||
451 | int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value) | |
452 | { | |
453 | if (!cam->sensor) | |
454 | return -1; | |
455 | ||
456 | return sn9c102_i2c_try_write(cam, cam->sensor, address, value); | |
457 | } | |
458 | ||
459 | /*****************************************************************************/ | |
460 | ||
461 | static void* | |
462 | sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len) | |
463 | { | |
464 | size_t soflen = sizeof(sn9c102_sof_header_t), i; | |
465 | u8 j, n = sizeof(sn9c102_sof_header) / soflen; | |
466 | ||
467 | for (i = 0; (len >= soflen) && (i <= len - soflen); i++) | |
468 | for (j = 0; j < n; j++) | |
469 | /* It's enough to compare 7 bytes */ | |
470 | if (!memcmp(mem + i, sn9c102_sof_header[j], 7)) { | |
471 | memcpy(cam->sof_header, mem + i, soflen); | |
472 | /* Skip the header */ | |
473 | return mem + i + soflen; | |
474 | } | |
475 | ||
476 | return NULL; | |
477 | } | |
478 | ||
479 | ||
480 | static void* | |
481 | sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len) | |
482 | { | |
483 | size_t eoflen = sizeof(sn9c102_eof_header_t), i; | |
484 | unsigned j, n = sizeof(sn9c102_eof_header) / eoflen; | |
485 | ||
486 | if (cam->sensor->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X) | |
487 | return NULL; /* EOF header does not exist in compressed data */ | |
488 | ||
489 | for (i = 0; (len >= eoflen) && (i <= len - eoflen); i++) | |
490 | for (j = 0; j < n; j++) | |
491 | if (!memcmp(mem + i, sn9c102_eof_header[j], eoflen)) | |
492 | return mem + i; | |
493 | ||
494 | return NULL; | |
495 | } | |
496 | ||
497 | ||
498 | static void sn9c102_urb_complete(struct urb *urb, struct pt_regs* regs) | |
499 | { | |
500 | struct sn9c102_device* cam = urb->context; | |
501 | struct sn9c102_frame_t** f; | |
502 | size_t imagesize; | |
503 | unsigned long lock_flags; | |
504 | u8 i; | |
505 | int err = 0; | |
506 | ||
507 | if (urb->status == -ENOENT) | |
508 | return; | |
509 | ||
510 | f = &cam->frame_current; | |
511 | ||
512 | if (cam->stream == STREAM_INTERRUPT) { | |
513 | cam->stream = STREAM_OFF; | |
514 | if ((*f)) | |
515 | (*f)->state = F_QUEUED; | |
516 | DBG(3, "Stream interrupted") | |
517 | wake_up_interruptible(&cam->wait_stream); | |
518 | } | |
519 | ||
520 | if (cam->state & DEV_DISCONNECTED) | |
521 | return; | |
522 | ||
523 | if (cam->state & DEV_MISCONFIGURED) { | |
524 | wake_up_interruptible(&cam->wait_frame); | |
525 | return; | |
526 | } | |
527 | ||
528 | if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue)) | |
529 | goto resubmit_urb; | |
530 | ||
531 | if (!(*f)) | |
532 | (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t, | |
533 | frame); | |
534 | ||
535 | imagesize = (cam->sensor->pix_format.width * | |
536 | cam->sensor->pix_format.height * | |
537 | cam->sensor->pix_format.priv) / 8; | |
538 | ||
539 | for (i = 0; i < urb->number_of_packets; i++) { | |
540 | unsigned int img, len, status; | |
541 | void *pos, *sof, *eof; | |
542 | ||
543 | len = urb->iso_frame_desc[i].actual_length; | |
544 | status = urb->iso_frame_desc[i].status; | |
545 | pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer; | |
546 | ||
547 | if (status) { | |
548 | DBG(3, "Error in isochronous frame") | |
549 | (*f)->state = F_ERROR; | |
550 | continue; | |
551 | } | |
552 | ||
553 | PDBGG("Isochrnous frame: length %u, #%u i", len, i) | |
554 | ||
555 | /* | |
556 | NOTE: It is probably correct to assume that SOF and EOF | |
557 | headers do not occur between two consecutive packets, | |
558 | but who knows..Whatever is the truth, this assumption | |
559 | doesn't introduce bugs. | |
560 | */ | |
561 | ||
562 | redo: | |
563 | sof = sn9c102_find_sof_header(cam, pos, len); | |
564 | if (!sof) { | |
565 | eof = sn9c102_find_eof_header(cam, pos, len); | |
566 | if ((*f)->state == F_GRABBING) { | |
567 | end_of_frame: | |
568 | img = len; | |
569 | ||
570 | if (eof) | |
571 | img = (eof > pos) ? eof - pos - 1 : 0; | |
572 | ||
573 | if ((*f)->buf.bytesused+img > imagesize) { | |
574 | u32 b = (*f)->buf.bytesused + img - | |
575 | imagesize; | |
576 | img = imagesize - (*f)->buf.bytesused; | |
577 | DBG(3, "Expected EOF not found: " | |
578 | "video frame cut") | |
579 | if (eof) | |
580 | DBG(3, "Exceeded limit: +%u " | |
581 | "bytes", (unsigned)(b)) | |
582 | } | |
583 | ||
584 | memcpy((*f)->bufmem + (*f)->buf.bytesused, pos, | |
585 | img); | |
586 | ||
587 | if ((*f)->buf.bytesused == 0) | |
588 | do_gettimeofday(&(*f)->buf.timestamp); | |
589 | ||
590 | (*f)->buf.bytesused += img; | |
591 | ||
592 | if ((*f)->buf.bytesused == imagesize || | |
593 | (cam->sensor->pix_format.pixelformat == | |
594 | V4L2_PIX_FMT_SN9C10X && eof)) { | |
595 | u32 b = (*f)->buf.bytesused; | |
596 | (*f)->state = F_DONE; | |
597 | (*f)->buf.sequence= ++cam->frame_count; | |
598 | spin_lock_irqsave(&cam->queue_lock, | |
599 | lock_flags); | |
600 | list_move_tail(&(*f)->frame, | |
601 | &cam->outqueue); | |
602 | if (!list_empty(&cam->inqueue)) | |
603 | (*f) = list_entry( | |
604 | cam->inqueue.next, | |
605 | struct sn9c102_frame_t, | |
606 | frame ); | |
607 | else | |
608 | (*f) = NULL; | |
609 | spin_unlock_irqrestore(&cam->queue_lock | |
610 | , lock_flags); | |
611 | memcpy(cam->sysfs.frame_header, | |
612 | cam->sof_header, | |
613 | sizeof(sn9c102_sof_header_t)); | |
614 | DBG(3, "Video frame captured: " | |
615 | "%lu bytes", (unsigned long)(b)) | |
616 | ||
617 | if (!(*f)) | |
618 | goto resubmit_urb; | |
619 | ||
620 | } else if (eof) { | |
621 | (*f)->state = F_ERROR; | |
622 | DBG(3, "Not expected EOF after %lu " | |
623 | "bytes of image data", | |
624 | (unsigned long)((*f)->buf.bytesused)) | |
625 | } | |
626 | ||
627 | if (sof) /* (1) */ | |
628 | goto start_of_frame; | |
629 | ||
630 | } else if (eof) { | |
631 | DBG(3, "EOF without SOF") | |
632 | continue; | |
633 | ||
634 | } else { | |
635 | PDBGG("Ignoring pointless isochronous frame") | |
636 | continue; | |
637 | } | |
638 | ||
639 | } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) { | |
640 | start_of_frame: | |
641 | (*f)->state = F_GRABBING; | |
642 | (*f)->buf.bytesused = 0; | |
643 | len -= (sof - pos); | |
644 | pos = sof; | |
645 | DBG(3, "SOF detected: new video frame") | |
646 | if (len) | |
647 | goto redo; | |
648 | ||
649 | } else if ((*f)->state == F_GRABBING) { | |
650 | eof = sn9c102_find_eof_header(cam, pos, len); | |
651 | if (eof && eof < sof) | |
652 | goto end_of_frame; /* (1) */ | |
653 | else { | |
654 | if (cam->sensor->pix_format.pixelformat == | |
655 | V4L2_PIX_FMT_SN9C10X) { | |
656 | eof = sof-sizeof(sn9c102_sof_header_t); | |
657 | goto end_of_frame; | |
658 | } else { | |
659 | DBG(3, "SOF before expected EOF after " | |
660 | "%lu bytes of image data", | |
661 | (unsigned long)((*f)->buf.bytesused)) | |
662 | goto start_of_frame; | |
663 | } | |
664 | } | |
665 | } | |
666 | } | |
667 | ||
668 | resubmit_urb: | |
669 | urb->dev = cam->usbdev; | |
670 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
671 | if (err < 0 && err != -EPERM) { | |
672 | cam->state |= DEV_MISCONFIGURED; | |
673 | DBG(1, "usb_submit_urb() failed") | |
674 | } | |
675 | ||
676 | wake_up_interruptible(&cam->wait_frame); | |
677 | } | |
678 | ||
679 | ||
680 | static int sn9c102_start_transfer(struct sn9c102_device* cam) | |
681 | { | |
682 | struct usb_device *udev = cam->usbdev; | |
683 | struct urb* urb; | |
684 | const unsigned int wMaxPacketSize[] = {0, 128, 256, 384, 512, | |
685 | 680, 800, 900, 1023}; | |
686 | const unsigned int psz = wMaxPacketSize[SN9C102_ALTERNATE_SETTING]; | |
687 | s8 i, j; | |
688 | int err = 0; | |
689 | ||
690 | for (i = 0; i < SN9C102_URBS; i++) { | |
691 | cam->transfer_buffer[i] = kmalloc(SN9C102_ISO_PACKETS * psz, | |
692 | GFP_KERNEL); | |
693 | if (!cam->transfer_buffer[i]) { | |
694 | err = -ENOMEM; | |
695 | DBG(1, "Not enough memory") | |
696 | goto free_buffers; | |
697 | } | |
698 | } | |
699 | ||
700 | for (i = 0; i < SN9C102_URBS; i++) { | |
701 | urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL); | |
702 | cam->urb[i] = urb; | |
703 | if (!urb) { | |
704 | err = -ENOMEM; | |
705 | DBG(1, "usb_alloc_urb() failed") | |
706 | goto free_urbs; | |
707 | } | |
708 | urb->dev = udev; | |
709 | urb->context = cam; | |
710 | urb->pipe = usb_rcvisocpipe(udev, 1); | |
711 | urb->transfer_flags = URB_ISO_ASAP; | |
712 | urb->number_of_packets = SN9C102_ISO_PACKETS; | |
713 | urb->complete = sn9c102_urb_complete; | |
714 | urb->transfer_buffer = cam->transfer_buffer[i]; | |
715 | urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS; | |
716 | urb->interval = 1; | |
717 | for (j = 0; j < SN9C102_ISO_PACKETS; j++) { | |
718 | urb->iso_frame_desc[j].offset = psz * j; | |
719 | urb->iso_frame_desc[j].length = psz; | |
720 | } | |
721 | } | |
722 | ||
723 | /* Enable video */ | |
724 | if (!(cam->reg[0x01] & 0x04)) { | |
725 | err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01); | |
726 | if (err) { | |
727 | err = -EIO; | |
728 | DBG(1, "I/O hardware error") | |
729 | goto free_urbs; | |
730 | } | |
731 | } | |
732 | ||
733 | err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING); | |
734 | if (err) { | |
735 | DBG(1, "usb_set_interface() failed") | |
736 | goto free_urbs; | |
737 | } | |
738 | ||
739 | cam->frame_current = NULL; | |
740 | ||
741 | for (i = 0; i < SN9C102_URBS; i++) { | |
742 | err = usb_submit_urb(cam->urb[i], GFP_KERNEL); | |
743 | if (err) { | |
744 | for (j = i-1; j >= 0; j--) | |
745 | usb_kill_urb(cam->urb[j]); | |
746 | DBG(1, "usb_submit_urb() failed, error %d", err) | |
747 | goto free_urbs; | |
748 | } | |
749 | } | |
750 | ||
751 | return 0; | |
752 | ||
753 | free_urbs: | |
754 | for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++) | |
755 | usb_free_urb(cam->urb[i]); | |
756 | ||
757 | free_buffers: | |
758 | for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++) | |
759 | kfree(cam->transfer_buffer[i]); | |
760 | ||
761 | return err; | |
762 | } | |
763 | ||
764 | ||
765 | static int sn9c102_stop_transfer(struct sn9c102_device* cam) | |
766 | { | |
767 | struct usb_device *udev = cam->usbdev; | |
768 | s8 i; | |
769 | int err = 0; | |
770 | ||
771 | if (cam->state & DEV_DISCONNECTED) | |
772 | return 0; | |
773 | ||
774 | for (i = SN9C102_URBS-1; i >= 0; i--) { | |
775 | usb_kill_urb(cam->urb[i]); | |
776 | usb_free_urb(cam->urb[i]); | |
777 | kfree(cam->transfer_buffer[i]); | |
778 | } | |
779 | ||
780 | err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */ | |
781 | if (err) | |
782 | DBG(3, "usb_set_interface() failed") | |
783 | ||
784 | return err; | |
785 | } | |
786 | ||
787 | ||
7107627b | 788 | static int sn9c102_stream_interrupt(struct sn9c102_device* cam) |
1da177e4 LT |
789 | { |
790 | int err = 0; | |
791 | ||
792 | cam->stream = STREAM_INTERRUPT; | |
793 | err = wait_event_timeout(cam->wait_stream, | |
794 | (cam->stream == STREAM_OFF) || | |
795 | (cam->state & DEV_DISCONNECTED), | |
796 | SN9C102_URB_TIMEOUT); | |
797 | if (cam->state & DEV_DISCONNECTED) | |
798 | return -ENODEV; | |
799 | else if (err) { | |
800 | cam->state |= DEV_MISCONFIGURED; | |
801 | DBG(1, "The camera is misconfigured. To use it, close and " | |
802 | "open /dev/video%d again.", cam->v4ldev->minor) | |
803 | return err; | |
804 | } | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | /*****************************************************************************/ | |
810 | ||
811 | static u8 sn9c102_strtou8(const char* buff, size_t len, ssize_t* count) | |
812 | { | |
813 | char str[5]; | |
814 | char* endp; | |
815 | unsigned long val; | |
816 | ||
817 | if (len < 4) { | |
818 | strncpy(str, buff, len); | |
819 | str[len+1] = '\0'; | |
820 | } else { | |
821 | strncpy(str, buff, 4); | |
822 | str[4] = '\0'; | |
823 | } | |
824 | ||
825 | val = simple_strtoul(str, &endp, 0); | |
826 | ||
827 | *count = 0; | |
828 | if (val <= 0xff) | |
829 | *count = (ssize_t)(endp - str); | |
830 | if ((*count) && (len == *count+1) && (buff[*count] == '\n')) | |
831 | *count += 1; | |
832 | ||
833 | return (u8)val; | |
834 | } | |
835 | ||
836 | /* | |
837 | NOTE 1: being inside one of the following methods implies that the v4l | |
838 | device exists for sure (see kobjects and reference counters) | |
839 | NOTE 2: buffers are PAGE_SIZE long | |
840 | */ | |
841 | ||
842 | static ssize_t sn9c102_show_reg(struct class_device* cd, char* buf) | |
843 | { | |
844 | struct sn9c102_device* cam; | |
845 | ssize_t count; | |
846 | ||
847 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
848 | return -ERESTARTSYS; | |
849 | ||
850 | cam = video_get_drvdata(to_video_device(cd)); | |
851 | if (!cam) { | |
852 | up(&sn9c102_sysfs_lock); | |
853 | return -ENODEV; | |
854 | } | |
855 | ||
856 | count = sprintf(buf, "%u\n", cam->sysfs.reg); | |
857 | ||
858 | up(&sn9c102_sysfs_lock); | |
859 | ||
860 | return count; | |
861 | } | |
862 | ||
863 | ||
864 | static ssize_t | |
865 | sn9c102_store_reg(struct class_device* cd, const char* buf, size_t len) | |
866 | { | |
867 | struct sn9c102_device* cam; | |
868 | u8 index; | |
869 | ssize_t count; | |
870 | ||
871 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
872 | return -ERESTARTSYS; | |
873 | ||
874 | cam = video_get_drvdata(to_video_device(cd)); | |
875 | if (!cam) { | |
876 | up(&sn9c102_sysfs_lock); | |
877 | return -ENODEV; | |
878 | } | |
879 | ||
880 | index = sn9c102_strtou8(buf, len, &count); | |
881 | if (index > 0x1f || !count) { | |
882 | up(&sn9c102_sysfs_lock); | |
883 | return -EINVAL; | |
884 | } | |
885 | ||
886 | cam->sysfs.reg = index; | |
887 | ||
888 | DBG(2, "Moved SN9C10X register index to 0x%02X", cam->sysfs.reg) | |
889 | DBG(3, "Written bytes: %zd", count) | |
890 | ||
891 | up(&sn9c102_sysfs_lock); | |
892 | ||
893 | return count; | |
894 | } | |
895 | ||
896 | ||
897 | static ssize_t sn9c102_show_val(struct class_device* cd, char* buf) | |
898 | { | |
899 | struct sn9c102_device* cam; | |
900 | ssize_t count; | |
901 | int val; | |
902 | ||
903 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
904 | return -ERESTARTSYS; | |
905 | ||
906 | cam = video_get_drvdata(to_video_device(cd)); | |
907 | if (!cam) { | |
908 | up(&sn9c102_sysfs_lock); | |
909 | return -ENODEV; | |
910 | } | |
911 | ||
912 | if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) { | |
913 | up(&sn9c102_sysfs_lock); | |
914 | return -EIO; | |
915 | } | |
916 | ||
917 | count = sprintf(buf, "%d\n", val); | |
918 | ||
919 | DBG(3, "Read bytes: %zd", count) | |
920 | ||
921 | up(&sn9c102_sysfs_lock); | |
922 | ||
923 | return count; | |
924 | } | |
925 | ||
926 | ||
927 | static ssize_t | |
928 | sn9c102_store_val(struct class_device* cd, const char* buf, size_t len) | |
929 | { | |
930 | struct sn9c102_device* cam; | |
931 | u8 value; | |
932 | ssize_t count; | |
933 | int err; | |
934 | ||
935 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
936 | return -ERESTARTSYS; | |
937 | ||
938 | cam = video_get_drvdata(to_video_device(cd)); | |
939 | if (!cam) { | |
940 | up(&sn9c102_sysfs_lock); | |
941 | return -ENODEV; | |
942 | } | |
943 | ||
944 | value = sn9c102_strtou8(buf, len, &count); | |
945 | if (!count) { | |
946 | up(&sn9c102_sysfs_lock); | |
947 | return -EINVAL; | |
948 | } | |
949 | ||
950 | err = sn9c102_write_reg(cam, value, cam->sysfs.reg); | |
951 | if (err) { | |
952 | up(&sn9c102_sysfs_lock); | |
953 | return -EIO; | |
954 | } | |
955 | ||
956 | DBG(2, "Written SN9C10X reg. 0x%02X, val. 0x%02X", | |
957 | cam->sysfs.reg, value) | |
958 | DBG(3, "Written bytes: %zd", count) | |
959 | ||
960 | up(&sn9c102_sysfs_lock); | |
961 | ||
962 | return count; | |
963 | } | |
964 | ||
965 | ||
966 | static ssize_t sn9c102_show_i2c_reg(struct class_device* cd, char* buf) | |
967 | { | |
968 | struct sn9c102_device* cam; | |
969 | ssize_t count; | |
970 | ||
971 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
972 | return -ERESTARTSYS; | |
973 | ||
974 | cam = video_get_drvdata(to_video_device(cd)); | |
975 | if (!cam) { | |
976 | up(&sn9c102_sysfs_lock); | |
977 | return -ENODEV; | |
978 | } | |
979 | ||
980 | count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg); | |
981 | ||
982 | DBG(3, "Read bytes: %zd", count) | |
983 | ||
984 | up(&sn9c102_sysfs_lock); | |
985 | ||
986 | return count; | |
987 | } | |
988 | ||
989 | ||
990 | static ssize_t | |
991 | sn9c102_store_i2c_reg(struct class_device* cd, const char* buf, size_t len) | |
992 | { | |
993 | struct sn9c102_device* cam; | |
994 | u8 index; | |
995 | ssize_t count; | |
996 | ||
997 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
998 | return -ERESTARTSYS; | |
999 | ||
1000 | cam = video_get_drvdata(to_video_device(cd)); | |
1001 | if (!cam) { | |
1002 | up(&sn9c102_sysfs_lock); | |
1003 | return -ENODEV; | |
1004 | } | |
1005 | ||
1006 | index = sn9c102_strtou8(buf, len, &count); | |
1007 | if (!count) { | |
1008 | up(&sn9c102_sysfs_lock); | |
1009 | return -EINVAL; | |
1010 | } | |
1011 | ||
1012 | cam->sysfs.i2c_reg = index; | |
1013 | ||
1014 | DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg) | |
1015 | DBG(3, "Written bytes: %zd", count) | |
1016 | ||
1017 | up(&sn9c102_sysfs_lock); | |
1018 | ||
1019 | return count; | |
1020 | } | |
1021 | ||
1022 | ||
1023 | static ssize_t sn9c102_show_i2c_val(struct class_device* cd, char* buf) | |
1024 | { | |
1025 | struct sn9c102_device* cam; | |
1026 | ssize_t count; | |
1027 | int val; | |
1028 | ||
1029 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
1030 | return -ERESTARTSYS; | |
1031 | ||
1032 | cam = video_get_drvdata(to_video_device(cd)); | |
1033 | if (!cam) { | |
1034 | up(&sn9c102_sysfs_lock); | |
1035 | return -ENODEV; | |
1036 | } | |
1037 | ||
1038 | if (!(cam->sensor->sysfs_ops & SN9C102_I2C_READ)) { | |
1039 | up(&sn9c102_sysfs_lock); | |
1040 | return -ENOSYS; | |
1041 | } | |
1042 | ||
1043 | if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) { | |
1044 | up(&sn9c102_sysfs_lock); | |
1045 | return -EIO; | |
1046 | } | |
1047 | ||
1048 | count = sprintf(buf, "%d\n", val); | |
1049 | ||
1050 | DBG(3, "Read bytes: %zd", count) | |
1051 | ||
1052 | up(&sn9c102_sysfs_lock); | |
1053 | ||
1054 | return count; | |
1055 | } | |
1056 | ||
1057 | ||
1058 | static ssize_t | |
1059 | sn9c102_store_i2c_val(struct class_device* cd, const char* buf, size_t len) | |
1060 | { | |
1061 | struct sn9c102_device* cam; | |
1062 | u8 value; | |
1063 | ssize_t count; | |
1064 | int err; | |
1065 | ||
1066 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
1067 | return -ERESTARTSYS; | |
1068 | ||
1069 | cam = video_get_drvdata(to_video_device(cd)); | |
1070 | if (!cam) { | |
1071 | up(&sn9c102_sysfs_lock); | |
1072 | return -ENODEV; | |
1073 | } | |
1074 | ||
1075 | if (!(cam->sensor->sysfs_ops & SN9C102_I2C_WRITE)) { | |
1076 | up(&sn9c102_sysfs_lock); | |
1077 | return -ENOSYS; | |
1078 | } | |
1079 | ||
1080 | value = sn9c102_strtou8(buf, len, &count); | |
1081 | if (!count) { | |
1082 | up(&sn9c102_sysfs_lock); | |
1083 | return -EINVAL; | |
1084 | } | |
1085 | ||
1086 | err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value); | |
1087 | if (err) { | |
1088 | up(&sn9c102_sysfs_lock); | |
1089 | return -EIO; | |
1090 | } | |
1091 | ||
1092 | DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X", | |
1093 | cam->sysfs.i2c_reg, value) | |
1094 | DBG(3, "Written bytes: %zd", count) | |
1095 | ||
1096 | up(&sn9c102_sysfs_lock); | |
1097 | ||
1098 | return count; | |
1099 | } | |
1100 | ||
1101 | ||
1102 | static ssize_t | |
1103 | sn9c102_store_green(struct class_device* cd, const char* buf, size_t len) | |
1104 | { | |
1105 | struct sn9c102_device* cam; | |
1106 | enum sn9c102_bridge bridge; | |
1107 | ssize_t res = 0; | |
1108 | u8 value; | |
1109 | ssize_t count; | |
1110 | ||
1111 | if (down_interruptible(&sn9c102_sysfs_lock)) | |
1112 | return -ERESTARTSYS; | |
1113 | ||
1114 | cam = video_get_drvdata(to_video_device(cd)); | |
1115 | if (!cam) { | |
1116 | up(&sn9c102_sysfs_lock); | |
1117 | return -ENODEV; | |
1118 | } | |
1119 | ||
1120 | bridge = cam->bridge; | |
1121 | ||
1122 | up(&sn9c102_sysfs_lock); | |
1123 | ||
1124 | value = sn9c102_strtou8(buf, len, &count); | |
1125 | if (!count) | |
1126 | return -EINVAL; | |
1127 | ||
1128 | switch (bridge) { | |
1129 | case BRIDGE_SN9C101: | |
1130 | case BRIDGE_SN9C102: | |
1131 | if (value > 0x0f) | |
1132 | return -EINVAL; | |
1133 | if ((res = sn9c102_store_reg(cd, "0x11", 4)) >= 0) | |
1134 | res = sn9c102_store_val(cd, buf, len); | |
1135 | break; | |
1136 | case BRIDGE_SN9C103: | |
1137 | if (value > 0x7f) | |
1138 | return -EINVAL; | |
1139 | if ((res = sn9c102_store_reg(cd, "0x04", 4)) >= 0) | |
1140 | res = sn9c102_store_val(cd, buf, len); | |
1141 | break; | |
1142 | } | |
1143 | ||
1144 | return res; | |
1145 | } | |
1146 | ||
1147 | ||
1148 | static ssize_t | |
1149 | sn9c102_store_blue(struct class_device* cd, const char* buf, size_t len) | |
1150 | { | |
1151 | ssize_t res = 0; | |
1152 | u8 value; | |
1153 | ssize_t count; | |
1154 | ||
1155 | value = sn9c102_strtou8(buf, len, &count); | |
1156 | if (!count || value > 0x7f) | |
1157 | return -EINVAL; | |
1158 | ||
1159 | if ((res = sn9c102_store_reg(cd, "0x06", 4)) >= 0) | |
1160 | res = sn9c102_store_val(cd, buf, len); | |
1161 | ||
1162 | return res; | |
1163 | } | |
1164 | ||
1165 | ||
1166 | static ssize_t | |
1167 | sn9c102_store_red(struct class_device* cd, const char* buf, size_t len) | |
1168 | { | |
1169 | ssize_t res = 0; | |
1170 | u8 value; | |
1171 | ssize_t count; | |
1172 | ||
1173 | value = sn9c102_strtou8(buf, len, &count); | |
1174 | if (!count || value > 0x7f) | |
1175 | return -EINVAL; | |
1176 | ||
1177 | if ((res = sn9c102_store_reg(cd, "0x05", 4)) >= 0) | |
1178 | res = sn9c102_store_val(cd, buf, len); | |
1179 | ||
1180 | return res; | |
1181 | } | |
1182 | ||
1183 | ||
1184 | static ssize_t sn9c102_show_frame_header(struct class_device* cd, char* buf) | |
1185 | { | |
1186 | struct sn9c102_device* cam; | |
1187 | ssize_t count; | |
1188 | ||
1189 | cam = video_get_drvdata(to_video_device(cd)); | |
1190 | if (!cam) | |
1191 | return -ENODEV; | |
1192 | ||
1193 | count = sizeof(cam->sysfs.frame_header); | |
1194 | memcpy(buf, cam->sysfs.frame_header, count); | |
1195 | ||
1196 | DBG(3, "Frame header, read bytes: %zd", count) | |
1197 | ||
1198 | return count; | |
1199 | } | |
1200 | ||
1201 | ||
1202 | static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, | |
1203 | sn9c102_show_reg, sn9c102_store_reg); | |
1204 | static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR, | |
1205 | sn9c102_show_val, sn9c102_store_val); | |
1206 | static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR, | |
1207 | sn9c102_show_i2c_reg, sn9c102_store_i2c_reg); | |
1208 | static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR, | |
1209 | sn9c102_show_i2c_val, sn9c102_store_i2c_val); | |
1210 | static CLASS_DEVICE_ATTR(green, S_IWUGO, NULL, sn9c102_store_green); | |
1211 | static CLASS_DEVICE_ATTR(blue, S_IWUGO, NULL, sn9c102_store_blue); | |
1212 | static CLASS_DEVICE_ATTR(red, S_IWUGO, NULL, sn9c102_store_red); | |
1213 | static CLASS_DEVICE_ATTR(frame_header, S_IRUGO, | |
1214 | sn9c102_show_frame_header, NULL); | |
1215 | ||
1216 | ||
1217 | static void sn9c102_create_sysfs(struct sn9c102_device* cam) | |
1218 | { | |
1219 | struct video_device *v4ldev = cam->v4ldev; | |
1220 | ||
1221 | video_device_create_file(v4ldev, &class_device_attr_reg); | |
1222 | video_device_create_file(v4ldev, &class_device_attr_val); | |
1223 | video_device_create_file(v4ldev, &class_device_attr_frame_header); | |
1224 | if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) | |
1225 | video_device_create_file(v4ldev, &class_device_attr_green); | |
1226 | else if (cam->bridge == BRIDGE_SN9C103) { | |
1227 | video_device_create_file(v4ldev, &class_device_attr_blue); | |
1228 | video_device_create_file(v4ldev, &class_device_attr_red); | |
1229 | } | |
1230 | if (cam->sensor->sysfs_ops) { | |
1231 | video_device_create_file(v4ldev, &class_device_attr_i2c_reg); | |
1232 | video_device_create_file(v4ldev, &class_device_attr_i2c_val); | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | /*****************************************************************************/ | |
1237 | ||
1238 | static int | |
1239 | sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix) | |
1240 | { | |
1241 | int err = 0; | |
1242 | ||
1243 | if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X) | |
1244 | err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80, 0x18); | |
1245 | else | |
1246 | err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f, 0x18); | |
1247 | ||
1248 | return err ? -EIO : 0; | |
1249 | } | |
1250 | ||
1251 | ||
1252 | static int | |
1253 | sn9c102_set_compression(struct sn9c102_device* cam, | |
1254 | struct v4l2_jpegcompression* compression) | |
1255 | { | |
1256 | int err = 0; | |
1257 | ||
1258 | if (compression->quality == 0) | |
1259 | err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01, 0x17); | |
1260 | else if (compression->quality == 1) | |
1261 | err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe, 0x17); | |
1262 | ||
1263 | return err ? -EIO : 0; | |
1264 | } | |
1265 | ||
1266 | ||
1267 | static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale) | |
1268 | { | |
1269 | u8 r = 0; | |
1270 | int err = 0; | |
1271 | ||
1272 | if (scale == 1) | |
1273 | r = cam->reg[0x18] & 0xcf; | |
1274 | else if (scale == 2) { | |
1275 | r = cam->reg[0x18] & 0xcf; | |
1276 | r |= 0x10; | |
1277 | } else if (scale == 4) | |
1278 | r = cam->reg[0x18] | 0x20; | |
1279 | ||
1280 | err += sn9c102_write_reg(cam, r, 0x18); | |
1281 | if (err) | |
1282 | return -EIO; | |
1283 | ||
1284 | PDBGG("Scaling factor: %u", scale) | |
1285 | ||
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | ||
1290 | static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect) | |
1291 | { | |
1292 | struct sn9c102_sensor* s = cam->sensor; | |
1293 | u8 h_start = (u8)(rect->left - s->cropcap.bounds.left), | |
1294 | v_start = (u8)(rect->top - s->cropcap.bounds.top), | |
1295 | h_size = (u8)(rect->width / 16), | |
1296 | v_size = (u8)(rect->height / 16); | |
1297 | int err = 0; | |
1298 | ||
1299 | err += sn9c102_write_reg(cam, h_start, 0x12); | |
1300 | err += sn9c102_write_reg(cam, v_start, 0x13); | |
1301 | err += sn9c102_write_reg(cam, h_size, 0x15); | |
1302 | err += sn9c102_write_reg(cam, v_size, 0x16); | |
1303 | if (err) | |
1304 | return -EIO; | |
1305 | ||
1306 | PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size " | |
1307 | "%u %u %u %u", h_start, v_start, h_size, v_size) | |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | ||
1313 | static int sn9c102_init(struct sn9c102_device* cam) | |
1314 | { | |
1315 | struct sn9c102_sensor* s = cam->sensor; | |
1316 | struct v4l2_control ctrl; | |
1317 | struct v4l2_queryctrl *qctrl; | |
1318 | struct v4l2_rect* rect; | |
1319 | u8 i = 0, n = 0; | |
1320 | int err = 0; | |
1321 | ||
1322 | if (!(cam->state & DEV_INITIALIZED)) { | |
1323 | init_waitqueue_head(&cam->open); | |
1324 | qctrl = s->qctrl; | |
1325 | rect = &(s->cropcap.defrect); | |
1326 | } else { /* use current values */ | |
1327 | qctrl = s->_qctrl; | |
1328 | rect = &(s->_rect); | |
1329 | } | |
1330 | ||
1331 | err += sn9c102_set_scale(cam, rect->width / s->pix_format.width); | |
1332 | err += sn9c102_set_crop(cam, rect); | |
1333 | if (err) | |
1334 | return err; | |
1335 | ||
1336 | if (s->init) { | |
1337 | err = s->init(cam); | |
1338 | if (err) { | |
1339 | DBG(3, "Sensor initialization failed") | |
1340 | return err; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | if (!(cam->state & DEV_INITIALIZED)) | |
1345 | cam->compression.quality = cam->reg[0x17] & 0x01 ? 0 : 1; | |
1346 | else | |
1347 | err += sn9c102_set_compression(cam, &cam->compression); | |
1348 | err += sn9c102_set_pix_format(cam, &s->pix_format); | |
1349 | if (s->set_pix_format) | |
1350 | err += s->set_pix_format(cam, &s->pix_format); | |
1351 | if (err) | |
1352 | return err; | |
1353 | ||
1354 | if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X) | |
1355 | DBG(3, "Compressed video format is active, quality %d", | |
1356 | cam->compression.quality) | |
1357 | else | |
1358 | DBG(3, "Uncompressed video format is active") | |
1359 | ||
1360 | if (s->set_crop) | |
1361 | if ((err = s->set_crop(cam, rect))) { | |
1362 | DBG(3, "set_crop() failed") | |
1363 | return err; | |
1364 | } | |
1365 | ||
1366 | if (s->set_ctrl) { | |
1367 | n = sizeof(s->qctrl) / sizeof(s->qctrl[0]); | |
1368 | for (i = 0; i < n; i++) | |
1369 | if (s->qctrl[i].id != 0 && | |
1370 | !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) { | |
1371 | ctrl.id = s->qctrl[i].id; | |
1372 | ctrl.value = qctrl[i].default_value; | |
1373 | err = s->set_ctrl(cam, &ctrl); | |
1374 | if (err) { | |
1375 | DBG(3, "Set %s control failed", | |
1376 | s->qctrl[i].name) | |
1377 | return err; | |
1378 | } | |
1379 | DBG(3, "Image sensor supports '%s' control", | |
1380 | s->qctrl[i].name) | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | if (!(cam->state & DEV_INITIALIZED)) { | |
1385 | init_MUTEX(&cam->fileop_sem); | |
1386 | spin_lock_init(&cam->queue_lock); | |
1387 | init_waitqueue_head(&cam->wait_frame); | |
1388 | init_waitqueue_head(&cam->wait_stream); | |
1389 | cam->nreadbuffers = 2; | |
1390 | memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl)); | |
1391 | memcpy(&(s->_rect), &(s->cropcap.defrect), | |
1392 | sizeof(struct v4l2_rect)); | |
1393 | cam->state |= DEV_INITIALIZED; | |
1394 | } | |
1395 | ||
1396 | DBG(2, "Initialization succeeded") | |
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | ||
1401 | static void sn9c102_release_resources(struct sn9c102_device* cam) | |
1402 | { | |
1403 | down(&sn9c102_sysfs_lock); | |
1404 | ||
1405 | DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor) | |
1406 | video_set_drvdata(cam->v4ldev, NULL); | |
1407 | video_unregister_device(cam->v4ldev); | |
1408 | ||
1409 | up(&sn9c102_sysfs_lock); | |
1410 | ||
1411 | kfree(cam->control_buffer); | |
1412 | } | |
1413 | ||
1414 | /*****************************************************************************/ | |
1415 | ||
1416 | static int sn9c102_open(struct inode* inode, struct file* filp) | |
1417 | { | |
1418 | struct sn9c102_device* cam; | |
1419 | int err = 0; | |
1420 | ||
1421 | /* | |
1422 | This is the only safe way to prevent race conditions with | |
1423 | disconnect | |
1424 | */ | |
1425 | if (!down_read_trylock(&sn9c102_disconnect)) | |
1426 | return -ERESTARTSYS; | |
1427 | ||
1428 | cam = video_get_drvdata(video_devdata(filp)); | |
1429 | ||
1430 | if (down_interruptible(&cam->dev_sem)) { | |
1431 | up_read(&sn9c102_disconnect); | |
1432 | return -ERESTARTSYS; | |
1433 | } | |
1434 | ||
1435 | if (cam->users) { | |
1436 | DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor) | |
1437 | if ((filp->f_flags & O_NONBLOCK) || | |
1438 | (filp->f_flags & O_NDELAY)) { | |
1439 | err = -EWOULDBLOCK; | |
1440 | goto out; | |
1441 | } | |
1442 | up(&cam->dev_sem); | |
1443 | err = wait_event_interruptible_exclusive(cam->open, | |
1444 | cam->state & DEV_DISCONNECTED | |
1445 | || !cam->users); | |
1446 | if (err) { | |
1447 | up_read(&sn9c102_disconnect); | |
1448 | return err; | |
1449 | } | |
1450 | if (cam->state & DEV_DISCONNECTED) { | |
1451 | up_read(&sn9c102_disconnect); | |
1452 | return -ENODEV; | |
1453 | } | |
1454 | down(&cam->dev_sem); | |
1455 | } | |
1456 | ||
1457 | ||
1458 | if (cam->state & DEV_MISCONFIGURED) { | |
1459 | err = sn9c102_init(cam); | |
1460 | if (err) { | |
1461 | DBG(1, "Initialization failed again. " | |
1462 | "I will retry on next open().") | |
1463 | goto out; | |
1464 | } | |
1465 | cam->state &= ~DEV_MISCONFIGURED; | |
1466 | } | |
1467 | ||
1468 | if ((err = sn9c102_start_transfer(cam))) | |
1469 | goto out; | |
1470 | ||
1471 | filp->private_data = cam; | |
1472 | cam->users++; | |
1473 | cam->io = IO_NONE; | |
1474 | cam->stream = STREAM_OFF; | |
1475 | cam->nbuffers = 0; | |
1476 | cam->frame_count = 0; | |
1477 | sn9c102_empty_framequeues(cam); | |
1478 | ||
1479 | DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor) | |
1480 | ||
1481 | out: | |
1482 | up(&cam->dev_sem); | |
1483 | up_read(&sn9c102_disconnect); | |
1484 | return err; | |
1485 | } | |
1486 | ||
1487 | ||
1488 | static int sn9c102_release(struct inode* inode, struct file* filp) | |
1489 | { | |
1490 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); | |
1491 | ||
1492 | down(&cam->dev_sem); /* prevent disconnect() to be called */ | |
1493 | ||
1494 | sn9c102_stop_transfer(cam); | |
1495 | ||
1496 | sn9c102_release_buffers(cam); | |
1497 | ||
1498 | if (cam->state & DEV_DISCONNECTED) { | |
1499 | sn9c102_release_resources(cam); | |
1500 | up(&cam->dev_sem); | |
1501 | kfree(cam); | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | cam->users--; | |
1506 | wake_up_interruptible_nr(&cam->open, 1); | |
1507 | ||
1508 | DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor) | |
1509 | ||
1510 | up(&cam->dev_sem); | |
1511 | ||
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | ||
1516 | static ssize_t | |
1517 | sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos) | |
1518 | { | |
1519 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); | |
1520 | struct sn9c102_frame_t* f, * i; | |
1521 | unsigned long lock_flags; | |
1522 | int err = 0; | |
1523 | ||
1524 | if (down_interruptible(&cam->fileop_sem)) | |
1525 | return -ERESTARTSYS; | |
1526 | ||
1527 | if (cam->state & DEV_DISCONNECTED) { | |
1528 | DBG(1, "Device not present") | |
1529 | up(&cam->fileop_sem); | |
1530 | return -ENODEV; | |
1531 | } | |
1532 | ||
1533 | if (cam->state & DEV_MISCONFIGURED) { | |
1534 | DBG(1, "The camera is misconfigured. Close and open it again.") | |
1535 | up(&cam->fileop_sem); | |
1536 | return -EIO; | |
1537 | } | |
1538 | ||
1539 | if (cam->io == IO_MMAP) { | |
1540 | DBG(3, "Close and open the device again to choose " | |
1541 | "the read method") | |
1542 | up(&cam->fileop_sem); | |
1543 | return -EINVAL; | |
1544 | } | |
1545 | ||
1546 | if (cam->io == IO_NONE) { | |
1547 | if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) { | |
1548 | DBG(1, "read() failed, not enough memory") | |
1549 | up(&cam->fileop_sem); | |
1550 | return -ENOMEM; | |
1551 | } | |
1552 | cam->io = IO_READ; | |
1553 | cam->stream = STREAM_ON; | |
1554 | sn9c102_queue_unusedframes(cam); | |
1555 | } | |
1556 | ||
1557 | if (!count) { | |
1558 | up(&cam->fileop_sem); | |
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | if (list_empty(&cam->outqueue)) { | |
1563 | if (filp->f_flags & O_NONBLOCK) { | |
1564 | up(&cam->fileop_sem); | |
1565 | return -EAGAIN; | |
1566 | } | |
1567 | err = wait_event_interruptible | |
1568 | ( cam->wait_frame, | |
1569 | (!list_empty(&cam->outqueue)) || | |
1570 | (cam->state & DEV_DISCONNECTED) || | |
1571 | (cam->state & DEV_MISCONFIGURED) ); | |
1572 | if (err) { | |
1573 | up(&cam->fileop_sem); | |
1574 | return err; | |
1575 | } | |
1576 | if (cam->state & DEV_DISCONNECTED) { | |
1577 | up(&cam->fileop_sem); | |
1578 | return -ENODEV; | |
1579 | } | |
1580 | if (cam->state & DEV_MISCONFIGURED) { | |
1581 | up(&cam->fileop_sem); | |
1582 | return -EIO; | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame); | |
1587 | ||
1588 | spin_lock_irqsave(&cam->queue_lock, lock_flags); | |
1589 | list_for_each_entry(i, &cam->outqueue, frame) | |
1590 | i->state = F_UNUSED; | |
1591 | INIT_LIST_HEAD(&cam->outqueue); | |
1592 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); | |
1593 | ||
1594 | sn9c102_queue_unusedframes(cam); | |
1595 | ||
1596 | if (count > f->buf.bytesused) | |
1597 | count = f->buf.bytesused; | |
1598 | ||
1599 | if (copy_to_user(buf, f->bufmem, count)) { | |
1600 | up(&cam->fileop_sem); | |
1601 | return -EFAULT; | |
1602 | } | |
1603 | *f_pos += count; | |
1604 | ||
1605 | PDBGG("Frame #%lu, bytes read: %zu", (unsigned long)f->buf.index,count) | |
1606 | ||
1607 | up(&cam->fileop_sem); | |
1608 | ||
1609 | return count; | |
1610 | } | |
1611 | ||
1612 | ||
1613 | static unsigned int sn9c102_poll(struct file *filp, poll_table *wait) | |
1614 | { | |
1615 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); | |
1616 | unsigned int mask = 0; | |
1617 | ||
1618 | if (down_interruptible(&cam->fileop_sem)) | |
1619 | return POLLERR; | |
1620 | ||
1621 | if (cam->state & DEV_DISCONNECTED) { | |
1622 | DBG(1, "Device not present") | |
1623 | goto error; | |
1624 | } | |
1625 | ||
1626 | if (cam->state & DEV_MISCONFIGURED) { | |
1627 | DBG(1, "The camera is misconfigured. Close and open it again.") | |
1628 | goto error; | |
1629 | } | |
1630 | ||
1631 | if (cam->io == IO_NONE) { | |
1632 | if (!sn9c102_request_buffers(cam, cam->nreadbuffers, | |
1633 | IO_READ)) { | |
1634 | DBG(1, "poll() failed, not enough memory") | |
1635 | goto error; | |
1636 | } | |
1637 | cam->io = IO_READ; | |
1638 | cam->stream = STREAM_ON; | |
1639 | } | |
1640 | ||
1641 | if (cam->io == IO_READ) | |
1642 | sn9c102_queue_unusedframes(cam); | |
1643 | ||
1644 | poll_wait(filp, &cam->wait_frame, wait); | |
1645 | ||
1646 | if (!list_empty(&cam->outqueue)) | |
1647 | mask |= POLLIN | POLLRDNORM; | |
1648 | ||
1649 | up(&cam->fileop_sem); | |
1650 | ||
1651 | return mask; | |
1652 | ||
1653 | error: | |
1654 | up(&cam->fileop_sem); | |
1655 | return POLLERR; | |
1656 | } | |
1657 | ||
1658 | ||
1659 | static void sn9c102_vm_open(struct vm_area_struct* vma) | |
1660 | { | |
1661 | struct sn9c102_frame_t* f = vma->vm_private_data; | |
1662 | f->vma_use_count++; | |
1663 | } | |
1664 | ||
1665 | ||
1666 | static void sn9c102_vm_close(struct vm_area_struct* vma) | |
1667 | { | |
1668 | /* NOTE: buffers are not freed here */ | |
1669 | struct sn9c102_frame_t* f = vma->vm_private_data; | |
1670 | f->vma_use_count--; | |
1671 | } | |
1672 | ||
1673 | ||
1674 | static struct vm_operations_struct sn9c102_vm_ops = { | |
1675 | .open = sn9c102_vm_open, | |
1676 | .close = sn9c102_vm_close, | |
1677 | }; | |
1678 | ||
1679 | ||
1680 | static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma) | |
1681 | { | |
1682 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); | |
1683 | unsigned long size = vma->vm_end - vma->vm_start, | |
1684 | start = vma->vm_start, | |
1685 | pos, | |
1686 | page; | |
1687 | u32 i; | |
1688 | ||
1689 | if (down_interruptible(&cam->fileop_sem)) | |
1690 | return -ERESTARTSYS; | |
1691 | ||
1692 | if (cam->state & DEV_DISCONNECTED) { | |
1693 | DBG(1, "Device not present") | |
1694 | up(&cam->fileop_sem); | |
1695 | return -ENODEV; | |
1696 | } | |
1697 | ||
1698 | if (cam->state & DEV_MISCONFIGURED) { | |
1699 | DBG(1, "The camera is misconfigured. Close and open it again.") | |
1700 | up(&cam->fileop_sem); | |
1701 | return -EIO; | |
1702 | } | |
1703 | ||
1704 | if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) || | |
1705 | size != PAGE_ALIGN(cam->frame[0].buf.length)) { | |
1706 | up(&cam->fileop_sem); | |
1707 | return -EINVAL; | |
1708 | } | |
1709 | ||
1710 | for (i = 0; i < cam->nbuffers; i++) { | |
1711 | if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff) | |
1712 | break; | |
1713 | } | |
1714 | if (i == cam->nbuffers) { | |
1715 | up(&cam->fileop_sem); | |
1716 | return -EINVAL; | |
1717 | } | |
1718 | ||
1719 | /* VM_IO is eventually going to replace PageReserved altogether */ | |
1720 | vma->vm_flags |= VM_IO; | |
1721 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ | |
1722 | ||
1723 | pos = (unsigned long)cam->frame[i].bufmem; | |
1724 | while (size > 0) { /* size is page-aligned */ | |
1725 | page = vmalloc_to_pfn((void *)pos); | |
1726 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, | |
1727 | vma->vm_page_prot)) { | |
1728 | up(&cam->fileop_sem); | |
1729 | return -EAGAIN; | |
1730 | } | |
1731 | start += PAGE_SIZE; | |
1732 | pos += PAGE_SIZE; | |
1733 | size -= PAGE_SIZE; | |
1734 | } | |
1735 | ||
1736 | vma->vm_ops = &sn9c102_vm_ops; | |
1737 | vma->vm_private_data = &cam->frame[i]; | |
1738 | ||
1739 | sn9c102_vm_open(vma); | |
1740 | ||
1741 | up(&cam->fileop_sem); | |
1742 | ||
1743 | return 0; | |
1744 | } | |
1745 | ||
1746 | ||
1747 | static int sn9c102_ioctl_v4l2(struct inode* inode, struct file* filp, | |
1748 | unsigned int cmd, void __user * arg) | |
1749 | { | |
1750 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); | |
1751 | ||
1752 | switch (cmd) { | |
1753 | ||
1754 | case VIDIOC_QUERYCAP: | |
1755 | { | |
1756 | struct v4l2_capability cap = { | |
1757 | .driver = "sn9c102", | |
1758 | .version = SN9C102_MODULE_VERSION_CODE, | |
1759 | .capabilities = V4L2_CAP_VIDEO_CAPTURE | | |
1760 | V4L2_CAP_READWRITE | | |
1761 | V4L2_CAP_STREAMING, | |
1762 | }; | |
1763 | ||
1764 | strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card)); | |
1765 | if (usb_make_path(cam->usbdev, cap.bus_info, | |
1766 | sizeof(cap.bus_info)) < 0) | |
1767 | strlcpy(cap.bus_info, cam->dev.bus_id, | |
1768 | sizeof(cap.bus_info)); | |
1769 | ||
1770 | if (copy_to_user(arg, &cap, sizeof(cap))) | |
1771 | return -EFAULT; | |
1772 | ||
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | case VIDIOC_ENUMINPUT: | |
1777 | { | |
1778 | struct v4l2_input i; | |
1779 | ||
1780 | if (copy_from_user(&i, arg, sizeof(i))) | |
1781 | return -EFAULT; | |
1782 | ||
1783 | if (i.index) | |
1784 | return -EINVAL; | |
1785 | ||
1786 | memset(&i, 0, sizeof(i)); | |
1787 | strcpy(i.name, "USB"); | |
1788 | ||
1789 | if (copy_to_user(arg, &i, sizeof(i))) | |
1790 | return -EFAULT; | |
1791 | ||
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | case VIDIOC_G_INPUT: | |
1796 | case VIDIOC_S_INPUT: | |
1797 | { | |
1798 | int index; | |
1799 | ||
1800 | if (copy_from_user(&index, arg, sizeof(index))) | |
1801 | return -EFAULT; | |
1802 | ||
1803 | if (index != 0) | |
1804 | return -EINVAL; | |
1805 | ||
1806 | return 0; | |
1807 | } | |
1808 | ||
1809 | case VIDIOC_QUERYCTRL: | |
1810 | { | |
1811 | struct sn9c102_sensor* s = cam->sensor; | |
1812 | struct v4l2_queryctrl qc; | |
1813 | u8 i, n; | |
1814 | ||
1815 | if (copy_from_user(&qc, arg, sizeof(qc))) | |
1816 | return -EFAULT; | |
1817 | ||
1818 | n = sizeof(s->qctrl) / sizeof(s->qctrl[0]); | |
1819 | for (i = 0; i < n; i++) | |
1820 | if (qc.id && qc.id == s->qctrl[i].id) { | |
1821 | memcpy(&qc, &(s->qctrl[i]), sizeof(qc)); | |
1822 | if (copy_to_user(arg, &qc, sizeof(qc))) | |
1823 | return -EFAULT; | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | return -EINVAL; | |
1828 | } | |
1829 | ||
1830 | case VIDIOC_G_CTRL: | |
1831 | { | |
1832 | struct sn9c102_sensor* s = cam->sensor; | |
1833 | struct v4l2_control ctrl; | |
1834 | int err = 0; | |
1835 | ||
1836 | if (!s->get_ctrl) | |
1837 | return -EINVAL; | |
1838 | ||
1839 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1840 | return -EFAULT; | |
1841 | ||
1842 | err = s->get_ctrl(cam, &ctrl); | |
1843 | ||
1844 | if (copy_to_user(arg, &ctrl, sizeof(ctrl))) | |
1845 | return -EFAULT; | |
1846 | ||
1847 | return err; | |
1848 | } | |
1849 | ||
1850 | case VIDIOC_S_CTRL_OLD: | |
1851 | case VIDIOC_S_CTRL: | |
1852 | { | |
1853 | struct sn9c102_sensor* s = cam->sensor; | |
1854 | struct v4l2_control ctrl; | |
1855 | u8 i, n; | |
1856 | int err = 0; | |
1857 | ||
1858 | if (!s->set_ctrl) | |
1859 | return -EINVAL; | |
1860 | ||
1861 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1862 | return -EFAULT; | |
1863 | ||
1864 | n = sizeof(s->qctrl) / sizeof(s->qctrl[0]); | |
1865 | for (i = 0; i < n; i++) | |
1866 | if (ctrl.id == s->qctrl[i].id) { | |
1867 | if (ctrl.value < s->qctrl[i].minimum || | |
1868 | ctrl.value > s->qctrl[i].maximum) | |
1869 | return -ERANGE; | |
1870 | ctrl.value -= ctrl.value % s->qctrl[i].step; | |
1871 | break; | |
1872 | } | |
1873 | ||
1874 | if ((err = s->set_ctrl(cam, &ctrl))) | |
1875 | return err; | |
1876 | ||
1877 | s->_qctrl[i].default_value = ctrl.value; | |
1878 | ||
1879 | PDBGG("VIDIOC_S_CTRL: id %lu, value %lu", | |
1880 | (unsigned long)ctrl.id, (unsigned long)ctrl.value) | |
1881 | ||
1882 | return 0; | |
1883 | } | |
1884 | ||
1885 | case VIDIOC_CROPCAP: | |
1886 | { | |
1887 | struct v4l2_cropcap* cc = &(cam->sensor->cropcap); | |
1888 | ||
1889 | cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1890 | cc->pixelaspect.numerator = 1; | |
1891 | cc->pixelaspect.denominator = 1; | |
1892 | ||
1893 | if (copy_to_user(arg, cc, sizeof(*cc))) | |
1894 | return -EFAULT; | |
1895 | ||
1896 | return 0; | |
1897 | } | |
1898 | ||
1899 | case VIDIOC_G_CROP: | |
1900 | { | |
1901 | struct sn9c102_sensor* s = cam->sensor; | |
1902 | struct v4l2_crop crop = { | |
1903 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
1904 | }; | |
1905 | ||
1906 | memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect)); | |
1907 | ||
1908 | if (copy_to_user(arg, &crop, sizeof(crop))) | |
1909 | return -EFAULT; | |
1910 | ||
1911 | return 0; | |
1912 | } | |
1913 | ||
1914 | case VIDIOC_S_CROP: | |
1915 | { | |
1916 | struct sn9c102_sensor* s = cam->sensor; | |
1917 | struct v4l2_crop crop; | |
1918 | struct v4l2_rect* rect; | |
1919 | struct v4l2_rect* bounds = &(s->cropcap.bounds); | |
1920 | struct v4l2_pix_format* pix_format = &(s->pix_format); | |
1921 | u8 scale; | |
1922 | const enum sn9c102_stream_state stream = cam->stream; | |
1923 | const u32 nbuffers = cam->nbuffers; | |
1924 | u32 i; | |
1925 | int err = 0; | |
1926 | ||
1927 | if (copy_from_user(&crop, arg, sizeof(crop))) | |
1928 | return -EFAULT; | |
1929 | ||
1930 | rect = &(crop.c); | |
1931 | ||
1932 | if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1933 | return -EINVAL; | |
1934 | ||
1935 | if (cam->module_param.force_munmap) | |
1936 | for (i = 0; i < cam->nbuffers; i++) | |
1937 | if (cam->frame[i].vma_use_count) { | |
1938 | DBG(3, "VIDIOC_S_CROP failed. " | |
1939 | "Unmap the buffers first.") | |
1940 | return -EINVAL; | |
1941 | } | |
1942 | ||
1943 | /* Preserve R,G or B origin */ | |
1944 | rect->left = (s->_rect.left & 1L) ? | |
1945 | rect->left | 1L : rect->left & ~1L; | |
1946 | rect->top = (s->_rect.top & 1L) ? | |
1947 | rect->top | 1L : rect->top & ~1L; | |
1948 | ||
1949 | if (rect->width < 16) | |
1950 | rect->width = 16; | |
1951 | if (rect->height < 16) | |
1952 | rect->height = 16; | |
1953 | if (rect->width > bounds->width) | |
1954 | rect->width = bounds->width; | |
1955 | if (rect->height > bounds->height) | |
1956 | rect->height = bounds->height; | |
1957 | if (rect->left < bounds->left) | |
1958 | rect->left = bounds->left; | |
1959 | if (rect->top < bounds->top) | |
1960 | rect->top = bounds->top; | |
1961 | if (rect->left + rect->width > bounds->left + bounds->width) | |
1962 | rect->left = bounds->left+bounds->width - rect->width; | |
1963 | if (rect->top + rect->height > bounds->top + bounds->height) | |
1964 | rect->top = bounds->top+bounds->height - rect->height; | |
1965 | ||
1966 | rect->width &= ~15L; | |
1967 | rect->height &= ~15L; | |
1968 | ||
1969 | if (SN9C102_PRESERVE_IMGSCALE) { | |
1970 | /* Calculate the actual scaling factor */ | |
1971 | u32 a, b; | |
1972 | a = rect->width * rect->height; | |
1973 | b = pix_format->width * pix_format->height; | |
1974 | scale = b ? (u8)((a / b) < 4 ? 1 : | |
1975 | ((a / b) < 16 ? 2 : 4)) : 1; | |
1976 | } else | |
1977 | scale = 1; | |
1978 | ||
1979 | if (cam->stream == STREAM_ON) | |
1980 | if ((err = sn9c102_stream_interrupt(cam))) | |
1981 | return err; | |
1982 | ||
1983 | if (copy_to_user(arg, &crop, sizeof(crop))) { | |
1984 | cam->stream = stream; | |
1985 | return -EFAULT; | |
1986 | } | |
1987 | ||
1988 | if (cam->module_param.force_munmap || cam->io == IO_READ) | |
1989 | sn9c102_release_buffers(cam); | |
1990 | ||
1991 | err = sn9c102_set_crop(cam, rect); | |
1992 | if (s->set_crop) | |
1993 | err += s->set_crop(cam, rect); | |
1994 | err += sn9c102_set_scale(cam, scale); | |
1995 | ||
1996 | if (err) { /* atomic, no rollback in ioctl() */ | |
1997 | cam->state |= DEV_MISCONFIGURED; | |
1998 | DBG(1, "VIDIOC_S_CROP failed because of hardware " | |
1999 | "problems. To use the camera, close and open " | |
2000 | "/dev/video%d again.", cam->v4ldev->minor) | |
2001 | return -EIO; | |
2002 | } | |
2003 | ||
2004 | s->pix_format.width = rect->width/scale; | |
2005 | s->pix_format.height = rect->height/scale; | |
2006 | memcpy(&(s->_rect), rect, sizeof(*rect)); | |
2007 | ||
2008 | if ((cam->module_param.force_munmap || cam->io == IO_READ) && | |
2009 | nbuffers != sn9c102_request_buffers(cam, nbuffers, | |
2010 | cam->io)) { | |
2011 | cam->state |= DEV_MISCONFIGURED; | |
2012 | DBG(1, "VIDIOC_S_CROP failed because of not enough " | |
2013 | "memory. To use the camera, close and open " | |
2014 | "/dev/video%d again.", cam->v4ldev->minor) | |
2015 | return -ENOMEM; | |
2016 | } | |
2017 | ||
2018 | cam->stream = stream; | |
2019 | ||
2020 | return 0; | |
2021 | } | |
2022 | ||
2023 | case VIDIOC_ENUM_FMT: | |
2024 | { | |
2025 | struct v4l2_fmtdesc fmtd; | |
2026 | ||
2027 | if (copy_from_user(&fmtd, arg, sizeof(fmtd))) | |
2028 | return -EFAULT; | |
2029 | ||
2030 | if (fmtd.index == 0) { | |
2031 | strcpy(fmtd.description, "bayer rgb"); | |
2032 | fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8; | |
2033 | } else if (fmtd.index == 1) { | |
2034 | strcpy(fmtd.description, "compressed"); | |
2035 | fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X; | |
2036 | fmtd.flags = V4L2_FMT_FLAG_COMPRESSED; | |
2037 | } else | |
2038 | return -EINVAL; | |
2039 | ||
2040 | fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
2041 | memset(&fmtd.reserved, 0, sizeof(fmtd.reserved)); | |
2042 | ||
2043 | if (copy_to_user(arg, &fmtd, sizeof(fmtd))) | |
2044 | return -EFAULT; | |
2045 | ||
2046 | return 0; | |
2047 | } | |
2048 | ||
2049 | case VIDIOC_G_FMT: | |
2050 | { | |
2051 | struct v4l2_format format; | |
2052 | struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format); | |
2053 | ||
2054 | if (copy_from_user(&format, arg, sizeof(format))) | |
2055 | return -EFAULT; | |
2056 | ||
2057 | if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
2058 | return -EINVAL; | |
2059 | ||
2060 | pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_SN9C10X) | |
2061 | ? 0 : (pfmt->width * pfmt->priv) / 8; | |
2062 | pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8); | |
2063 | pfmt->field = V4L2_FIELD_NONE; | |
2064 | memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt)); | |
2065 | ||
2066 | if (copy_to_user(arg, &format, sizeof(format))) | |
2067 | return -EFAULT; | |
2068 | ||
2069 | return 0; | |
2070 | } | |
2071 | ||
2072 | case VIDIOC_TRY_FMT: | |
2073 | case VIDIOC_S_FMT: | |
2074 | { | |
2075 | struct sn9c102_sensor* s = cam->sensor; | |
2076 | struct v4l2_format format; | |
2077 | struct v4l2_pix_format* pix; | |
2078 | struct v4l2_pix_format* pfmt = &(s->pix_format); | |
2079 | struct v4l2_rect* bounds = &(s->cropcap.bounds); | |
2080 | struct v4l2_rect rect; | |
2081 | u8 scale; | |
2082 | const enum sn9c102_stream_state stream = cam->stream; | |
2083 | const u32 nbuffers = cam->nbuffers; | |
2084 | u32 i; | |
2085 | int err = 0; | |
2086 | ||
2087 | if (copy_from_user(&format, arg, sizeof(format))) | |
2088 | return -EFAULT; | |
2089 | ||
2090 | pix = &(format.fmt.pix); | |
2091 | ||
2092 | if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
2093 | return -EINVAL; | |
2094 | ||
2095 | memcpy(&rect, &(s->_rect), sizeof(rect)); | |
2096 | ||
2097 | { /* calculate the actual scaling factor */ | |
2098 | u32 a, b; | |
2099 | a = rect.width * rect.height; | |
2100 | b = pix->width * pix->height; | |
2101 | scale = b ? (u8)((a / b) < 4 ? 1 : | |
2102 | ((a / b) < 16 ? 2 : 4)) : 1; | |
2103 | } | |
2104 | ||
2105 | rect.width = scale * pix->width; | |
2106 | rect.height = scale * pix->height; | |
2107 | ||
2108 | if (rect.width < 16) | |
2109 | rect.width = 16; | |
2110 | if (rect.height < 16) | |
2111 | rect.height = 16; | |
2112 | if (rect.width > bounds->left + bounds->width - rect.left) | |
2113 | rect.width = bounds->left + bounds->width - rect.left; | |
2114 | if (rect.height > bounds->top + bounds->height - rect.top) | |
2115 | rect.height = bounds->top + bounds->height - rect.top; | |
2116 | ||
2117 | rect.width &= ~15L; | |
2118 | rect.height &= ~15L; | |
2119 | ||
2120 | { /* adjust the scaling factor */ | |
2121 | u32 a, b; | |
2122 | a = rect.width * rect.height; | |
2123 | b = pix->width * pix->height; | |
2124 | scale = b ? (u8)((a / b) < 4 ? 1 : | |
2125 | ((a / b) < 16 ? 2 : 4)) : 1; | |
2126 | } | |
2127 | ||
2128 | pix->width = rect.width / scale; | |
2129 | pix->height = rect.height / scale; | |
2130 | ||
2131 | if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X && | |
2132 | pix->pixelformat != V4L2_PIX_FMT_SBGGR8) | |
2133 | pix->pixelformat = pfmt->pixelformat; | |
2134 | pix->priv = pfmt->priv; /* bpp */ | |
2135 | pix->colorspace = pfmt->colorspace; | |
2136 | pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X) | |
2137 | ? 0 : (pix->width * pix->priv) / 8; | |
2138 | pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8); | |
2139 | pix->field = V4L2_FIELD_NONE; | |
2140 | ||
2141 | if (cmd == VIDIOC_TRY_FMT) { | |
2142 | if (copy_to_user(arg, &format, sizeof(format))) | |
2143 | return -EFAULT; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | if (cam->module_param.force_munmap) | |
2148 | for (i = 0; i < cam->nbuffers; i++) | |
2149 | if (cam->frame[i].vma_use_count) { | |
2150 | DBG(3, "VIDIOC_S_FMT failed. " | |
2151 | "Unmap the buffers first.") | |
2152 | return -EINVAL; | |
2153 | } | |
2154 | ||
2155 | if (cam->stream == STREAM_ON) | |
2156 | if ((err = sn9c102_stream_interrupt(cam))) | |
2157 | return err; | |
2158 | ||
2159 | if (copy_to_user(arg, &format, sizeof(format))) { | |
2160 | cam->stream = stream; | |
2161 | return -EFAULT; | |
2162 | } | |
2163 | ||
2164 | if (cam->module_param.force_munmap || cam->io == IO_READ) | |
2165 | sn9c102_release_buffers(cam); | |
2166 | ||
2167 | err += sn9c102_set_pix_format(cam, pix); | |
2168 | err += sn9c102_set_crop(cam, &rect); | |
2169 | if (s->set_pix_format) | |
2170 | err += s->set_pix_format(cam, pix); | |
2171 | if (s->set_crop) | |
2172 | err += s->set_crop(cam, &rect); | |
2173 | err += sn9c102_set_scale(cam, scale); | |
2174 | ||
2175 | if (err) { /* atomic, no rollback in ioctl() */ | |
2176 | cam->state |= DEV_MISCONFIGURED; | |
2177 | DBG(1, "VIDIOC_S_FMT failed because of hardware " | |
2178 | "problems. To use the camera, close and open " | |
2179 | "/dev/video%d again.", cam->v4ldev->minor) | |
2180 | return -EIO; | |
2181 | } | |
2182 | ||
2183 | memcpy(pfmt, pix, sizeof(*pix)); | |
2184 | memcpy(&(s->_rect), &rect, sizeof(rect)); | |
2185 | ||
2186 | if ((cam->module_param.force_munmap || cam->io == IO_READ) && | |
2187 | nbuffers != sn9c102_request_buffers(cam, nbuffers, | |
2188 | cam->io)) { | |
2189 | cam->state |= DEV_MISCONFIGURED; | |
2190 | DBG(1, "VIDIOC_S_FMT failed because of not enough " | |
2191 | "memory. To use the camera, close and open " | |
2192 | "/dev/video%d again.", cam->v4ldev->minor) | |
2193 | return -ENOMEM; | |
2194 | } | |
2195 | ||
2196 | cam->stream = stream; | |
2197 | ||
2198 | return 0; | |
2199 | } | |
2200 | ||
2201 | case VIDIOC_G_JPEGCOMP: | |
2202 | { | |
2203 | if (copy_to_user(arg, &cam->compression, | |
2204 | sizeof(cam->compression))) | |
2205 | return -EFAULT; | |
2206 | ||
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | case VIDIOC_S_JPEGCOMP: | |
2211 | { | |
2212 | struct v4l2_jpegcompression jc; | |
2213 | const enum sn9c102_stream_state stream = cam->stream; | |
2214 | int err = 0; | |
2215 | ||
2216 | if (copy_from_user(&jc, arg, sizeof(jc))) | |
2217 | return -EFAULT; | |
2218 | ||
2219 | if (jc.quality != 0 && jc.quality != 1) | |
2220 | return -EINVAL; | |
2221 | ||
2222 | if (cam->stream == STREAM_ON) | |
2223 | if ((err = sn9c102_stream_interrupt(cam))) | |
2224 | return err; | |
2225 | ||
2226 | err += sn9c102_set_compression(cam, &jc); | |
2227 | if (err) { /* atomic, no rollback in ioctl() */ | |
2228 | cam->state |= DEV_MISCONFIGURED; | |
2229 | DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware " | |
2230 | "problems. To use the camera, close and open " | |
2231 | "/dev/video%d again.", cam->v4ldev->minor) | |
2232 | return -EIO; | |
2233 | } | |
2234 | ||
2235 | cam->compression.quality = jc.quality; | |
2236 | ||
2237 | cam->stream = stream; | |
2238 | ||
2239 | return 0; | |
2240 | } | |
2241 | ||
2242 | case VIDIOC_REQBUFS: | |
2243 | { | |
2244 | struct v4l2_requestbuffers rb; | |
2245 | u32 i; | |
2246 | int err; | |
2247 | ||
2248 | if (copy_from_user(&rb, arg, sizeof(rb))) | |
2249 | return -EFAULT; | |
2250 | ||
2251 | if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || | |
2252 | rb.memory != V4L2_MEMORY_MMAP) | |
2253 | return -EINVAL; | |
2254 | ||
2255 | if (cam->io == IO_READ) { | |
2256 | DBG(3, "Close and open the device again to choose " | |
2257 | "the mmap I/O method") | |
2258 | return -EINVAL; | |
2259 | } | |
2260 | ||
2261 | for (i = 0; i < cam->nbuffers; i++) | |
2262 | if (cam->frame[i].vma_use_count) { | |
2263 | DBG(3, "VIDIOC_REQBUFS failed. " | |
2264 | "Previous buffers are still mapped.") | |
2265 | return -EINVAL; | |
2266 | } | |
2267 | ||
2268 | if (cam->stream == STREAM_ON) | |
2269 | if ((err = sn9c102_stream_interrupt(cam))) | |
2270 | return err; | |
2271 | ||
2272 | sn9c102_empty_framequeues(cam); | |
2273 | ||
2274 | sn9c102_release_buffers(cam); | |
2275 | if (rb.count) | |
2276 | rb.count = sn9c102_request_buffers(cam, rb.count, | |
2277 | IO_MMAP); | |
2278 | ||
2279 | if (copy_to_user(arg, &rb, sizeof(rb))) { | |
2280 | sn9c102_release_buffers(cam); | |
2281 | cam->io = IO_NONE; | |
2282 | return -EFAULT; | |
2283 | } | |
2284 | ||
2285 | cam->io = rb.count ? IO_MMAP : IO_NONE; | |
2286 | ||
2287 | return 0; | |
2288 | } | |
2289 | ||
2290 | case VIDIOC_QUERYBUF: | |
2291 | { | |
2292 | struct v4l2_buffer b; | |
2293 | ||
2294 | if (copy_from_user(&b, arg, sizeof(b))) | |
2295 | return -EFAULT; | |
2296 | ||
2297 | if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || | |
2298 | b.index >= cam->nbuffers || cam->io != IO_MMAP) | |
2299 | return -EINVAL; | |
2300 | ||
2301 | memcpy(&b, &cam->frame[b.index].buf, sizeof(b)); | |
2302 | ||
2303 | if (cam->frame[b.index].vma_use_count) | |
2304 | b.flags |= V4L2_BUF_FLAG_MAPPED; | |
2305 | ||
2306 | if (cam->frame[b.index].state == F_DONE) | |
2307 | b.flags |= V4L2_BUF_FLAG_DONE; | |
2308 | else if (cam->frame[b.index].state != F_UNUSED) | |
2309 | b.flags |= V4L2_BUF_FLAG_QUEUED; | |
2310 | ||
2311 | if (copy_to_user(arg, &b, sizeof(b))) | |
2312 | return -EFAULT; | |
2313 | ||
2314 | return 0; | |
2315 | } | |
2316 | ||
2317 | case VIDIOC_QBUF: | |
2318 | { | |
2319 | struct v4l2_buffer b; | |
2320 | unsigned long lock_flags; | |
2321 | ||
2322 | if (copy_from_user(&b, arg, sizeof(b))) | |
2323 | return -EFAULT; | |
2324 | ||
2325 | if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || | |
2326 | b.index >= cam->nbuffers || cam->io != IO_MMAP) | |
2327 | return -EINVAL; | |
2328 | ||
2329 | if (cam->frame[b.index].state != F_UNUSED) | |
2330 | return -EINVAL; | |
2331 | ||
2332 | cam->frame[b.index].state = F_QUEUED; | |
2333 | ||
2334 | spin_lock_irqsave(&cam->queue_lock, lock_flags); | |
2335 | list_add_tail(&cam->frame[b.index].frame, &cam->inqueue); | |
2336 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); | |
2337 | ||
2338 | PDBGG("Frame #%lu queued", (unsigned long)b.index) | |
2339 | ||
2340 | return 0; | |
2341 | } | |
2342 | ||
2343 | case VIDIOC_DQBUF: | |
2344 | { | |
2345 | struct v4l2_buffer b; | |
2346 | struct sn9c102_frame_t *f; | |
2347 | unsigned long lock_flags; | |
2348 | int err = 0; | |
2349 | ||
2350 | if (copy_from_user(&b, arg, sizeof(b))) | |
2351 | return -EFAULT; | |
2352 | ||
2353 | if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP) | |
2354 | return -EINVAL; | |
2355 | ||
2356 | if (list_empty(&cam->outqueue)) { | |
2357 | if (cam->stream == STREAM_OFF) | |
2358 | return -EINVAL; | |
2359 | if (filp->f_flags & O_NONBLOCK) | |
2360 | return -EAGAIN; | |
2361 | err = wait_event_interruptible | |
2362 | ( cam->wait_frame, | |
2363 | (!list_empty(&cam->outqueue)) || | |
2364 | (cam->state & DEV_DISCONNECTED) || | |
2365 | (cam->state & DEV_MISCONFIGURED) ); | |
2366 | if (err) | |
2367 | return err; | |
2368 | if (cam->state & DEV_DISCONNECTED) | |
2369 | return -ENODEV; | |
2370 | if (cam->state & DEV_MISCONFIGURED) | |
2371 | return -EIO; | |
2372 | } | |
2373 | ||
2374 | spin_lock_irqsave(&cam->queue_lock, lock_flags); | |
2375 | f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, | |
2376 | frame); | |
2377 | list_del(cam->outqueue.next); | |
2378 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); | |
2379 | ||
2380 | f->state = F_UNUSED; | |
2381 | ||
2382 | memcpy(&b, &f->buf, sizeof(b)); | |
2383 | if (f->vma_use_count) | |
2384 | b.flags |= V4L2_BUF_FLAG_MAPPED; | |
2385 | ||
2386 | if (copy_to_user(arg, &b, sizeof(b))) | |
2387 | return -EFAULT; | |
2388 | ||
2389 | PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index) | |
2390 | ||
2391 | return 0; | |
2392 | } | |
2393 | ||
2394 | case VIDIOC_STREAMON: | |
2395 | { | |
2396 | int type; | |
2397 | ||
2398 | if (copy_from_user(&type, arg, sizeof(type))) | |
2399 | return -EFAULT; | |
2400 | ||
2401 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP) | |
2402 | return -EINVAL; | |
2403 | ||
2404 | if (list_empty(&cam->inqueue)) | |
2405 | return -EINVAL; | |
2406 | ||
2407 | cam->stream = STREAM_ON; | |
2408 | ||
2409 | DBG(3, "Stream on") | |
2410 | ||
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | case VIDIOC_STREAMOFF: | |
2415 | { | |
2416 | int type, err; | |
2417 | ||
2418 | if (copy_from_user(&type, arg, sizeof(type))) | |
2419 | return -EFAULT; | |
2420 | ||
2421 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP) | |
2422 | return -EINVAL; | |
2423 | ||
2424 | if (cam->stream == STREAM_ON) | |
2425 | if ((err = sn9c102_stream_interrupt(cam))) | |
2426 | return err; | |
2427 | ||
2428 | sn9c102_empty_framequeues(cam); | |
2429 | ||
2430 | DBG(3, "Stream off") | |
2431 | ||
2432 | return 0; | |
2433 | } | |
2434 | ||
2435 | case VIDIOC_G_PARM: | |
2436 | { | |
2437 | struct v4l2_streamparm sp; | |
2438 | ||
2439 | if (copy_from_user(&sp, arg, sizeof(sp))) | |
2440 | return -EFAULT; | |
2441 | ||
2442 | if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
2443 | return -EINVAL; | |
2444 | ||
2445 | sp.parm.capture.extendedmode = 0; | |
2446 | sp.parm.capture.readbuffers = cam->nreadbuffers; | |
2447 | ||
2448 | if (copy_to_user(arg, &sp, sizeof(sp))) | |
2449 | return -EFAULT; | |
2450 | ||
2451 | return 0; | |
2452 | } | |
2453 | ||
2454 | case VIDIOC_S_PARM_OLD: | |
2455 | case VIDIOC_S_PARM: | |
2456 | { | |
2457 | struct v4l2_streamparm sp; | |
2458 | ||
2459 | if (copy_from_user(&sp, arg, sizeof(sp))) | |
2460 | return -EFAULT; | |
2461 | ||
2462 | if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
2463 | return -EINVAL; | |
2464 | ||
2465 | sp.parm.capture.extendedmode = 0; | |
2466 | ||
2467 | if (sp.parm.capture.readbuffers == 0) | |
2468 | sp.parm.capture.readbuffers = cam->nreadbuffers; | |
2469 | ||
2470 | if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES) | |
2471 | sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES; | |
2472 | ||
2473 | if (copy_to_user(arg, &sp, sizeof(sp))) | |
2474 | return -EFAULT; | |
2475 | ||
2476 | cam->nreadbuffers = sp.parm.capture.readbuffers; | |
2477 | ||
2478 | return 0; | |
2479 | } | |
2480 | ||
2481 | case VIDIOC_G_STD: | |
2482 | case VIDIOC_S_STD: | |
2483 | case VIDIOC_QUERYSTD: | |
2484 | case VIDIOC_ENUMSTD: | |
2485 | case VIDIOC_QUERYMENU: | |
2486 | return -EINVAL; | |
2487 | ||
2488 | default: | |
2489 | return -EINVAL; | |
2490 | ||
2491 | } | |
2492 | } | |
2493 | ||
2494 | ||
2495 | static int sn9c102_ioctl(struct inode* inode, struct file* filp, | |
2496 | unsigned int cmd, unsigned long arg) | |
2497 | { | |
2498 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); | |
2499 | int err = 0; | |
2500 | ||
2501 | if (down_interruptible(&cam->fileop_sem)) | |
2502 | return -ERESTARTSYS; | |
2503 | ||
2504 | if (cam->state & DEV_DISCONNECTED) { | |
2505 | DBG(1, "Device not present") | |
2506 | up(&cam->fileop_sem); | |
2507 | return -ENODEV; | |
2508 | } | |
2509 | ||
2510 | if (cam->state & DEV_MISCONFIGURED) { | |
2511 | DBG(1, "The camera is misconfigured. Close and open it again.") | |
2512 | up(&cam->fileop_sem); | |
2513 | return -EIO; | |
2514 | } | |
2515 | ||
2516 | err = sn9c102_ioctl_v4l2(inode, filp, cmd, (void __user *)arg); | |
2517 | ||
2518 | up(&cam->fileop_sem); | |
2519 | ||
2520 | return err; | |
2521 | } | |
2522 | ||
2523 | ||
2524 | static struct file_operations sn9c102_fops = { | |
2525 | .owner = THIS_MODULE, | |
2526 | .open = sn9c102_open, | |
2527 | .release = sn9c102_release, | |
2528 | .ioctl = sn9c102_ioctl, | |
2529 | .read = sn9c102_read, | |
2530 | .poll = sn9c102_poll, | |
2531 | .mmap = sn9c102_mmap, | |
2532 | .llseek = no_llseek, | |
2533 | }; | |
2534 | ||
2535 | /*****************************************************************************/ | |
2536 | ||
2537 | /* It exists a single interface only. We do not need to validate anything. */ | |
2538 | static int | |
2539 | sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id) | |
2540 | { | |
2541 | struct usb_device *udev = interface_to_usbdev(intf); | |
2542 | struct sn9c102_device* cam; | |
2543 | static unsigned int dev_nr = 0; | |
2544 | unsigned int i, n; | |
2545 | int err = 0, r; | |
2546 | ||
2547 | n = sizeof(sn9c102_id_table)/sizeof(sn9c102_id_table[0]); | |
2548 | for (i = 0; i < n-1; i++) | |
2549 | if (le16_to_cpu(udev->descriptor.idVendor) == | |
2550 | sn9c102_id_table[i].idVendor && | |
2551 | le16_to_cpu(udev->descriptor.idProduct) == | |
2552 | sn9c102_id_table[i].idProduct) | |
2553 | break; | |
2554 | if (i == n-1) | |
2555 | return -ENODEV; | |
2556 | ||
2557 | if (!(cam = kmalloc(sizeof(struct sn9c102_device), GFP_KERNEL))) | |
2558 | return -ENOMEM; | |
2559 | memset(cam, 0, sizeof(*cam)); | |
2560 | ||
2561 | cam->usbdev = udev; | |
2562 | ||
2563 | memcpy(&cam->dev, &udev->dev, sizeof(struct device)); | |
2564 | ||
2565 | if (!(cam->control_buffer = kmalloc(8, GFP_KERNEL))) { | |
2566 | DBG(1, "kmalloc() failed") | |
2567 | err = -ENOMEM; | |
2568 | goto fail; | |
2569 | } | |
2570 | memset(cam->control_buffer, 0, 8); | |
2571 | ||
2572 | if (!(cam->v4ldev = video_device_alloc())) { | |
2573 | DBG(1, "video_device_alloc() failed") | |
2574 | err = -ENOMEM; | |
2575 | goto fail; | |
2576 | } | |
2577 | ||
2578 | init_MUTEX(&cam->dev_sem); | |
2579 | ||
2580 | r = sn9c102_read_reg(cam, 0x00); | |
2581 | if (r < 0 || r != 0x10) { | |
2582 | DBG(1, "Sorry, this is not a SN9C10x based camera " | |
2583 | "(vid/pid 0x%04X/0x%04X)", | |
2584 | sn9c102_id_table[i].idVendor,sn9c102_id_table[i].idProduct) | |
2585 | err = -ENODEV; | |
2586 | goto fail; | |
2587 | } | |
2588 | ||
2589 | cam->bridge = (sn9c102_id_table[i].idProduct & 0xffc0) == 0x6080 ? | |
2590 | BRIDGE_SN9C103 : BRIDGE_SN9C102; | |
2591 | switch (cam->bridge) { | |
2592 | case BRIDGE_SN9C101: | |
2593 | case BRIDGE_SN9C102: | |
2594 | DBG(2, "SN9C10[12] PC Camera Controller detected " | |
2595 | "(vid/pid 0x%04X/0x%04X)", sn9c102_id_table[i].idVendor, | |
2596 | sn9c102_id_table[i].idProduct) | |
2597 | break; | |
2598 | case BRIDGE_SN9C103: | |
2599 | DBG(2, "SN9C103 PC Camera Controller detected " | |
2600 | "(vid/pid 0x%04X/0x%04X)", sn9c102_id_table[i].idVendor, | |
2601 | sn9c102_id_table[i].idProduct) | |
2602 | break; | |
2603 | } | |
2604 | ||
2605 | for (i = 0; sn9c102_sensor_table[i]; i++) { | |
2606 | err = sn9c102_sensor_table[i](cam); | |
2607 | if (!err) | |
2608 | break; | |
2609 | } | |
2610 | ||
2611 | if (!err && cam->sensor) { | |
2612 | DBG(2, "%s image sensor detected", cam->sensor->name) | |
2613 | DBG(3, "Support for %s maintained by %s", | |
2614 | cam->sensor->name, cam->sensor->maintainer) | |
2615 | } else { | |
2616 | DBG(1, "No supported image sensor detected") | |
2617 | err = -ENODEV; | |
2618 | goto fail; | |
2619 | } | |
2620 | ||
2621 | if (sn9c102_init(cam)) { | |
2622 | DBG(1, "Initialization failed. I will retry on open().") | |
2623 | cam->state |= DEV_MISCONFIGURED; | |
2624 | } | |
2625 | ||
2626 | strcpy(cam->v4ldev->name, "SN9C10x PC Camera"); | |
2627 | cam->v4ldev->owner = THIS_MODULE; | |
2628 | cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES; | |
2629 | cam->v4ldev->hardware = VID_HARDWARE_SN9C102; | |
2630 | cam->v4ldev->fops = &sn9c102_fops; | |
2631 | cam->v4ldev->minor = video_nr[dev_nr]; | |
2632 | cam->v4ldev->release = video_device_release; | |
2633 | video_set_drvdata(cam->v4ldev, cam); | |
2634 | ||
2635 | down(&cam->dev_sem); | |
2636 | ||
2637 | err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER, | |
2638 | video_nr[dev_nr]); | |
2639 | if (err) { | |
2640 | DBG(1, "V4L2 device registration failed") | |
2641 | if (err == -ENFILE && video_nr[dev_nr] == -1) | |
2642 | DBG(1, "Free /dev/videoX node not found") | |
2643 | video_nr[dev_nr] = -1; | |
2644 | dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0; | |
2645 | up(&cam->dev_sem); | |
2646 | goto fail; | |
2647 | } | |
2648 | ||
2649 | DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor) | |
2650 | ||
2651 | cam->module_param.force_munmap = force_munmap[dev_nr]; | |
2652 | ||
2653 | dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0; | |
2654 | ||
2655 | sn9c102_create_sysfs(cam); | |
2656 | DBG(2, "Optional device control through 'sysfs' interface ready") | |
2657 | ||
2658 | usb_set_intfdata(intf, cam); | |
2659 | ||
2660 | up(&cam->dev_sem); | |
2661 | ||
2662 | return 0; | |
2663 | ||
2664 | fail: | |
2665 | if (cam) { | |
2666 | kfree(cam->control_buffer); | |
2667 | if (cam->v4ldev) | |
2668 | video_device_release(cam->v4ldev); | |
2669 | kfree(cam); | |
2670 | } | |
2671 | return err; | |
2672 | } | |
2673 | ||
2674 | ||
2675 | static void sn9c102_usb_disconnect(struct usb_interface* intf) | |
2676 | { | |
2677 | struct sn9c102_device* cam = usb_get_intfdata(intf); | |
2678 | ||
2679 | if (!cam) | |
2680 | return; | |
2681 | ||
2682 | down_write(&sn9c102_disconnect); | |
2683 | ||
2684 | down(&cam->dev_sem); | |
2685 | ||
2686 | DBG(2, "Disconnecting %s...", cam->v4ldev->name) | |
2687 | ||
2688 | wake_up_interruptible_all(&cam->open); | |
2689 | ||
2690 | if (cam->users) { | |
2691 | DBG(2, "Device /dev/video%d is open! Deregistration and " | |
2692 | "memory deallocation are deferred on close.", | |
2693 | cam->v4ldev->minor) | |
2694 | cam->state |= DEV_MISCONFIGURED; | |
2695 | sn9c102_stop_transfer(cam); | |
2696 | cam->state |= DEV_DISCONNECTED; | |
2697 | wake_up_interruptible(&cam->wait_frame); | |
2698 | wake_up_interruptible(&cam->wait_stream); | |
2699 | } else { | |
2700 | cam->state |= DEV_DISCONNECTED; | |
2701 | sn9c102_release_resources(cam); | |
2702 | } | |
2703 | ||
2704 | up(&cam->dev_sem); | |
2705 | ||
2706 | if (!cam->users) | |
2707 | kfree(cam); | |
2708 | ||
2709 | up_write(&sn9c102_disconnect); | |
2710 | } | |
2711 | ||
2712 | ||
2713 | static struct usb_driver sn9c102_usb_driver = { | |
2714 | .owner = THIS_MODULE, | |
2715 | .name = "sn9c102", | |
2716 | .id_table = sn9c102_id_table, | |
2717 | .probe = sn9c102_usb_probe, | |
2718 | .disconnect = sn9c102_usb_disconnect, | |
2719 | }; | |
2720 | ||
2721 | /*****************************************************************************/ | |
2722 | ||
2723 | static int __init sn9c102_module_init(void) | |
2724 | { | |
2725 | int err = 0; | |
2726 | ||
2727 | KDBG(2, SN9C102_MODULE_NAME " v" SN9C102_MODULE_VERSION) | |
2728 | KDBG(3, SN9C102_MODULE_AUTHOR) | |
2729 | ||
2730 | if ((err = usb_register(&sn9c102_usb_driver))) | |
2731 | KDBG(1, "usb_register() failed") | |
2732 | ||
2733 | return err; | |
2734 | } | |
2735 | ||
2736 | ||
2737 | static void __exit sn9c102_module_exit(void) | |
2738 | { | |
2739 | usb_deregister(&sn9c102_usb_driver); | |
2740 | } | |
2741 | ||
2742 | ||
2743 | module_init(sn9c102_module_init); | |
2744 | module_exit(sn9c102_module_exit); |