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ab33d507 AC |
1 | /**************************************************************************** |
2 | * | |
3 | * Filename: cpia2_usb.c | |
4 | * | |
5 | * Copyright 2001, STMicrolectronics, Inc. | |
6 | * Contact: steve.miller@st.com | |
7 | * | |
8 | * Description: | |
9 | * This is a USB driver for CPia2 based video cameras. | |
10 | * The infrastructure of this driver is based on the cpia usb driver by | |
11 | * Jochen Scharrlach and Johannes Erdfeldt. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | * | |
27 | * Stripped of 2.4 stuff ready for main kernel submit by | |
28 | * Alan Cox <alan@redhat.com> | |
29 | ****************************************************************************/ | |
30 | ||
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/usb.h> | |
34 | ||
35 | #include "cpia2.h" | |
36 | ||
37 | static int frame_sizes[] = { | |
38 | 0, // USBIF_CMDONLY | |
39 | 0, // USBIF_BULK | |
40 | 128, // USBIF_ISO_1 | |
41 | 384, // USBIF_ISO_2 | |
42 | 640, // USBIF_ISO_3 | |
43 | 768, // USBIF_ISO_4 | |
44 | 896, // USBIF_ISO_5 | |
45 | 1023, // USBIF_ISO_6 | |
46 | }; | |
47 | ||
48 | #define FRAMES_PER_DESC 10 | |
49 | #define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt] | |
50 | ||
51 | static void process_frame(struct camera_data *cam); | |
7d12e780 | 52 | static void cpia2_usb_complete(struct urb *urb); |
ab33d507 AC |
53 | static int cpia2_usb_probe(struct usb_interface *intf, |
54 | const struct usb_device_id *id); | |
55 | static void cpia2_usb_disconnect(struct usb_interface *intf); | |
56 | ||
57 | static void free_sbufs(struct camera_data *cam); | |
58 | static void add_APPn(struct camera_data *cam); | |
59 | static void add_COM(struct camera_data *cam); | |
60 | static int submit_urbs(struct camera_data *cam); | |
61 | static int set_alternate(struct camera_data *cam, unsigned int alt); | |
62 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt); | |
63 | ||
64 | static struct usb_device_id cpia2_id_table[] = { | |
65 | {USB_DEVICE(0x0553, 0x0100)}, | |
66 | {USB_DEVICE(0x0553, 0x0140)}, | |
67 | {USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */ | |
68 | {} /* Terminating entry */ | |
69 | }; | |
70 | MODULE_DEVICE_TABLE(usb, cpia2_id_table); | |
71 | ||
72 | static struct usb_driver cpia2_driver = { | |
73 | .name = "cpia2", | |
74 | .probe = cpia2_usb_probe, | |
75 | .disconnect = cpia2_usb_disconnect, | |
76 | .id_table = cpia2_id_table | |
77 | }; | |
78 | ||
79 | ||
80 | /****************************************************************************** | |
81 | * | |
82 | * process_frame | |
83 | * | |
84 | *****************************************************************************/ | |
85 | static void process_frame(struct camera_data *cam) | |
86 | { | |
87 | static int frame_count = 0; | |
88 | ||
89 | unsigned char *inbuff = cam->workbuff->data; | |
90 | ||
91 | DBG("Processing frame #%d, current:%d\n", | |
92 | cam->workbuff->num, cam->curbuff->num); | |
93 | ||
94 | if(cam->workbuff->length > cam->workbuff->max_length) | |
95 | cam->workbuff->max_length = cam->workbuff->length; | |
96 | ||
97 | if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) { | |
98 | frame_count++; | |
99 | } else { | |
100 | cam->workbuff->status = FRAME_ERROR; | |
101 | DBG("Start of frame not found\n"); | |
102 | return; | |
103 | } | |
104 | ||
105 | /*** | |
106 | * Now the output buffer should have a JPEG image in it. | |
107 | ***/ | |
108 | if(!cam->first_image_seen) { | |
109 | /* Always skip the first image after streaming | |
110 | * starts. It is almost certainly corrupt. */ | |
111 | cam->first_image_seen = 1; | |
112 | cam->workbuff->status = FRAME_EMPTY; | |
113 | return; | |
114 | } | |
115 | if (cam->workbuff->length > 3) { | |
116 | if(cam->mmapped && | |
117 | cam->workbuff->length < cam->workbuff->max_length) { | |
118 | /* No junk in the buffers */ | |
119 | memset(cam->workbuff->data+cam->workbuff->length, | |
120 | 0, cam->workbuff->max_length- | |
121 | cam->workbuff->length); | |
122 | } | |
123 | cam->workbuff->max_length = cam->workbuff->length; | |
124 | cam->workbuff->status = FRAME_READY; | |
125 | ||
126 | if(!cam->mmapped && cam->num_frames > 2) { | |
127 | /* During normal reading, the most recent | |
128 | * frame will be read. If the current frame | |
129 | * hasn't started reading yet, it will never | |
130 | * be read, so mark it empty. If the buffer is | |
131 | * mmapped, or we have few buffers, we need to | |
132 | * wait for the user to free the buffer. | |
133 | * | |
134 | * NOTE: This is not entirely foolproof with 3 | |
135 | * buffers, but it would take an EXTREMELY | |
136 | * overloaded system to cause problems (possible | |
137 | * image data corruption). Basically, it would | |
138 | * need to take more time to execute cpia2_read | |
139 | * than it would for the camera to send | |
140 | * cam->num_frames-2 frames before problems | |
141 | * could occur. | |
142 | */ | |
143 | cam->curbuff->status = FRAME_EMPTY; | |
144 | } | |
145 | cam->curbuff = cam->workbuff; | |
146 | cam->workbuff = cam->workbuff->next; | |
147 | DBG("Changed buffers, work:%d, current:%d\n", | |
148 | cam->workbuff->num, cam->curbuff->num); | |
149 | return; | |
150 | } else { | |
151 | DBG("Not enough data for an image.\n"); | |
152 | } | |
153 | ||
154 | cam->workbuff->status = FRAME_ERROR; | |
155 | return; | |
156 | } | |
157 | ||
158 | /****************************************************************************** | |
159 | * | |
160 | * add_APPn | |
161 | * | |
162 | * Adds a user specified APPn record | |
163 | *****************************************************************************/ | |
164 | static void add_APPn(struct camera_data *cam) | |
165 | { | |
166 | if(cam->APP_len > 0) { | |
167 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; | |
168 | cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn; | |
169 | cam->workbuff->data[cam->workbuff->length++] = 0; | |
170 | cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2; | |
171 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
172 | cam->APP_data, cam->APP_len); | |
173 | cam->workbuff->length += cam->APP_len; | |
174 | } | |
175 | } | |
176 | ||
177 | /****************************************************************************** | |
178 | * | |
179 | * add_COM | |
180 | * | |
181 | * Adds a user specified COM record | |
182 | *****************************************************************************/ | |
183 | static void add_COM(struct camera_data *cam) | |
184 | { | |
185 | if(cam->COM_len > 0) { | |
186 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; | |
187 | cam->workbuff->data[cam->workbuff->length++] = 0xFE; | |
188 | cam->workbuff->data[cam->workbuff->length++] = 0; | |
189 | cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2; | |
190 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
191 | cam->COM_data, cam->COM_len); | |
192 | cam->workbuff->length += cam->COM_len; | |
193 | } | |
194 | } | |
195 | ||
196 | /****************************************************************************** | |
197 | * | |
198 | * cpia2_usb_complete | |
199 | * | |
200 | * callback when incoming packet is received | |
201 | *****************************************************************************/ | |
7d12e780 | 202 | static void cpia2_usb_complete(struct urb *urb) |
ab33d507 AC |
203 | { |
204 | int i; | |
205 | unsigned char *cdata; | |
206 | static int frame_ready = false; | |
207 | struct camera_data *cam = (struct camera_data *) urb->context; | |
208 | ||
209 | if (urb->status!=0) { | |
210 | if (!(urb->status == -ENOENT || | |
211 | urb->status == -ECONNRESET || | |
212 | urb->status == -ESHUTDOWN)) | |
213 | { | |
214 | DBG("urb->status = %d!\n", urb->status); | |
215 | } | |
216 | DBG("Stopping streaming\n"); | |
217 | return; | |
218 | } | |
219 | ||
220 | if (!cam->streaming || !cam->present || cam->open_count == 0) { | |
221 | LOG("Will now stop the streaming: streaming = %d, " | |
222 | "present=%d, open_count=%d\n", | |
223 | cam->streaming, cam->present, cam->open_count); | |
224 | return; | |
225 | } | |
226 | ||
227 | /*** | |
228 | * Packet collater | |
229 | ***/ | |
230 | //DBG("Collating %d packets\n", urb->number_of_packets); | |
231 | for (i = 0; i < urb->number_of_packets; i++) { | |
232 | u16 checksum, iso_checksum; | |
233 | int j; | |
234 | int n = urb->iso_frame_desc[i].actual_length; | |
235 | int st = urb->iso_frame_desc[i].status; | |
236 | ||
237 | if(cam->workbuff->status == FRAME_READY) { | |
238 | struct framebuf *ptr; | |
239 | /* Try to find an available buffer */ | |
240 | DBG("workbuff full, searching\n"); | |
241 | for (ptr = cam->workbuff->next; | |
242 | ptr != cam->workbuff; | |
243 | ptr = ptr->next) | |
244 | { | |
245 | if (ptr->status == FRAME_EMPTY) { | |
246 | ptr->status = FRAME_READING; | |
247 | ptr->length = 0; | |
248 | break; | |
249 | } | |
250 | } | |
251 | if (ptr == cam->workbuff) | |
252 | break; /* No READING or EMPTY buffers left */ | |
253 | ||
254 | cam->workbuff = ptr; | |
255 | } | |
256 | ||
257 | if (cam->workbuff->status == FRAME_EMPTY || | |
258 | cam->workbuff->status == FRAME_ERROR) { | |
259 | cam->workbuff->status = FRAME_READING; | |
260 | cam->workbuff->length = 0; | |
261 | } | |
262 | ||
263 | //DBG(" Packet %d length = %d, status = %d\n", i, n, st); | |
264 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
265 | ||
266 | if (st) { | |
267 | LOG("cpia2 data error: [%d] len=%d, status = %d\n", | |
268 | i, n, st); | |
269 | if(!ALLOW_CORRUPT) | |
270 | cam->workbuff->status = FRAME_ERROR; | |
271 | continue; | |
272 | } | |
273 | ||
274 | if(n<=2) | |
275 | continue; | |
276 | ||
277 | checksum = 0; | |
278 | for(j=0; j<n-2; ++j) | |
279 | checksum += cdata[j]; | |
280 | iso_checksum = cdata[j] + cdata[j+1]*256; | |
281 | if(checksum != iso_checksum) { | |
282 | LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n", | |
283 | i, n, (int)checksum, (int)iso_checksum); | |
284 | if(!ALLOW_CORRUPT) { | |
285 | cam->workbuff->status = FRAME_ERROR; | |
286 | continue; | |
287 | } | |
288 | } | |
289 | n -= 2; | |
290 | ||
291 | if(cam->workbuff->status != FRAME_READING) { | |
292 | if((0xFF == cdata[0] && 0xD8 == cdata[1]) || | |
293 | (0xD8 == cdata[0] && 0xFF == cdata[1] && | |
294 | 0 != cdata[2])) { | |
295 | /* frame is skipped, but increment total | |
296 | * frame count anyway */ | |
297 | cam->frame_count++; | |
298 | } | |
299 | DBG("workbuff not reading, status=%d\n", | |
300 | cam->workbuff->status); | |
301 | continue; | |
302 | } | |
303 | ||
304 | if (cam->frame_size < cam->workbuff->length + n) { | |
305 | ERR("buffer overflow! length: %d, n: %d\n", | |
306 | cam->workbuff->length, n); | |
307 | cam->workbuff->status = FRAME_ERROR; | |
308 | if(cam->workbuff->length > cam->workbuff->max_length) | |
309 | cam->workbuff->max_length = | |
310 | cam->workbuff->length; | |
311 | continue; | |
312 | } | |
313 | ||
314 | if (cam->workbuff->length == 0) { | |
315 | int data_offset; | |
316 | if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) { | |
317 | data_offset = 1; | |
318 | } else if((0xFF == cdata[0]) && (0xD8 == cdata[1]) | |
319 | && (0xFF == cdata[2])) { | |
320 | data_offset = 2; | |
321 | } else { | |
322 | DBG("Ignoring packet, not beginning!\n"); | |
323 | continue; | |
324 | } | |
325 | DBG("Start of frame pattern found\n"); | |
326 | do_gettimeofday(&cam->workbuff->timestamp); | |
327 | cam->workbuff->seq = cam->frame_count++; | |
328 | cam->workbuff->data[0] = 0xFF; | |
329 | cam->workbuff->data[1] = 0xD8; | |
330 | cam->workbuff->length = 2; | |
331 | add_APPn(cam); | |
332 | add_COM(cam); | |
333 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
334 | cdata+data_offset, n-data_offset); | |
335 | cam->workbuff->length += n-data_offset; | |
336 | } else if (cam->workbuff->length > 0) { | |
337 | memcpy(cam->workbuff->data + cam->workbuff->length, | |
338 | cdata, n); | |
339 | cam->workbuff->length += n; | |
340 | } | |
341 | ||
342 | if ((cam->workbuff->length >= 3) && | |
343 | (cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) && | |
344 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) && | |
345 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) { | |
346 | frame_ready = true; | |
347 | cam->workbuff->data[cam->workbuff->length - 1] = 0; | |
348 | cam->workbuff->length -= 1; | |
349 | } else if ((cam->workbuff->length >= 2) && | |
350 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) && | |
351 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) { | |
352 | frame_ready = true; | |
353 | } | |
354 | ||
355 | if (frame_ready) { | |
356 | DBG("Workbuff image size = %d\n",cam->workbuff->length); | |
357 | process_frame(cam); | |
358 | ||
359 | frame_ready = false; | |
360 | ||
361 | if (waitqueue_active(&cam->wq_stream)) | |
362 | wake_up_interruptible(&cam->wq_stream); | |
363 | } | |
364 | } | |
365 | ||
366 | if(cam->streaming) { | |
367 | /* resubmit */ | |
368 | urb->dev = cam->dev; | |
369 | if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) | |
370 | ERR("%s: usb_submit_urb ret %d!\n", __func__, i); | |
371 | } | |
372 | } | |
373 | ||
374 | /****************************************************************************** | |
375 | * | |
376 | * configure_transfer_mode | |
377 | * | |
378 | *****************************************************************************/ | |
379 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt) | |
380 | { | |
381 | static unsigned char iso_regs[8][4] = { | |
382 | {0x00, 0x00, 0x00, 0x00}, | |
383 | {0x00, 0x00, 0x00, 0x00}, | |
384 | {0xB9, 0x00, 0x00, 0x7E}, | |
385 | {0xB9, 0x00, 0x01, 0x7E}, | |
386 | {0xB9, 0x00, 0x02, 0x7E}, | |
387 | {0xB9, 0x00, 0x02, 0xFE}, | |
388 | {0xB9, 0x00, 0x03, 0x7E}, | |
389 | {0xB9, 0x00, 0x03, 0xFD} | |
390 | }; | |
391 | struct cpia2_command cmd; | |
392 | unsigned char reg; | |
393 | ||
394 | if(!cam->present) | |
395 | return -ENODEV; | |
396 | ||
397 | /*** | |
398 | * Write the isoc registers according to the alternate selected | |
399 | ***/ | |
400 | cmd.direction = TRANSFER_WRITE; | |
401 | cmd.buffer.block_data[0] = iso_regs[alt][0]; | |
402 | cmd.buffer.block_data[1] = iso_regs[alt][1]; | |
403 | cmd.buffer.block_data[2] = iso_regs[alt][2]; | |
404 | cmd.buffer.block_data[3] = iso_regs[alt][3]; | |
405 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
406 | cmd.start = CPIA2_VC_USB_ISOLIM; | |
407 | cmd.reg_count = 4; | |
408 | cpia2_send_command(cam, &cmd); | |
409 | ||
410 | /*** | |
411 | * Enable relevant streams before starting polling. | |
412 | * First read USB Stream Config Register. | |
413 | ***/ | |
414 | cmd.direction = TRANSFER_READ; | |
415 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
416 | cmd.start = CPIA2_VC_USB_STRM; | |
417 | cmd.reg_count = 1; | |
418 | cpia2_send_command(cam, &cmd); | |
419 | reg = cmd.buffer.block_data[0]; | |
420 | ||
421 | /* Clear iso, bulk, and int */ | |
422 | reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE | | |
423 | CPIA2_VC_USB_STRM_ISO_ENABLE | | |
424 | CPIA2_VC_USB_STRM_INT_ENABLE); | |
425 | ||
426 | if (alt == USBIF_BULK) { | |
427 | DBG("Enabling bulk xfer\n"); | |
428 | reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */ | |
429 | cam->xfer_mode = XFER_BULK; | |
430 | } else if (alt >= USBIF_ISO_1) { | |
431 | DBG("Enabling ISOC xfer\n"); | |
432 | reg |= CPIA2_VC_USB_STRM_ISO_ENABLE; | |
433 | cam->xfer_mode = XFER_ISOC; | |
434 | } | |
435 | ||
436 | cmd.buffer.block_data[0] = reg; | |
437 | cmd.direction = TRANSFER_WRITE; | |
438 | cmd.start = CPIA2_VC_USB_STRM; | |
439 | cmd.reg_count = 1; | |
440 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
441 | cpia2_send_command(cam, &cmd); | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
446 | /****************************************************************************** | |
447 | * | |
448 | * cpia2_usb_change_streaming_alternate | |
449 | * | |
450 | *****************************************************************************/ | |
451 | int cpia2_usb_change_streaming_alternate(struct camera_data *cam, | |
452 | unsigned int alt) | |
453 | { | |
454 | int ret = 0; | |
455 | ||
456 | if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6) | |
457 | return -EINVAL; | |
458 | ||
459 | if(alt == cam->params.camera_state.stream_mode) | |
460 | return 0; | |
461 | ||
462 | cpia2_usb_stream_pause(cam); | |
463 | ||
464 | configure_transfer_mode(cam, alt); | |
465 | ||
466 | cam->params.camera_state.stream_mode = alt; | |
467 | ||
468 | /* Reset the camera to prevent image quality degradation */ | |
469 | cpia2_reset_camera(cam); | |
470 | ||
471 | cpia2_usb_stream_resume(cam); | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
476 | /****************************************************************************** | |
477 | * | |
478 | * set_alternate | |
479 | * | |
480 | *****************************************************************************/ | |
481 | int set_alternate(struct camera_data *cam, unsigned int alt) | |
482 | { | |
483 | int ret = 0; | |
484 | ||
485 | if(alt == cam->cur_alt) | |
486 | return 0; | |
487 | ||
488 | if (cam->cur_alt != USBIF_CMDONLY) { | |
489 | DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY); | |
490 | ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY); | |
491 | if (ret != 0) | |
492 | return ret; | |
493 | } | |
494 | if (alt != USBIF_CMDONLY) { | |
495 | DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt); | |
496 | ret = usb_set_interface(cam->dev, cam->iface, alt); | |
497 | if (ret != 0) | |
498 | return ret; | |
499 | } | |
500 | ||
501 | cam->old_alt = cam->cur_alt; | |
502 | cam->cur_alt = alt; | |
503 | ||
504 | return ret; | |
505 | } | |
506 | ||
507 | /****************************************************************************** | |
508 | * | |
509 | * free_sbufs | |
510 | * | |
511 | * Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL | |
512 | * are assumed to be allocated. Non-NULL .urb members are also assumed to be | |
513 | * submitted (and must therefore be killed before they are freed). | |
514 | *****************************************************************************/ | |
515 | static void free_sbufs(struct camera_data *cam) | |
516 | { | |
517 | int i; | |
518 | ||
519 | for (i = 0; i < NUM_SBUF; i++) { | |
520 | if(cam->sbuf[i].urb) { | |
521 | usb_kill_urb(cam->sbuf[i].urb); | |
522 | usb_free_urb(cam->sbuf[i].urb); | |
523 | cam->sbuf[i].urb = NULL; | |
524 | } | |
525 | if(cam->sbuf[i].data) { | |
526 | kfree(cam->sbuf[i].data); | |
527 | cam->sbuf[i].data = NULL; | |
528 | } | |
529 | } | |
530 | } | |
531 | ||
532 | /******* | |
533 | * Convenience functions | |
534 | *******/ | |
535 | /**************************************************************************** | |
536 | * | |
537 | * write_packet | |
538 | * | |
539 | ***************************************************************************/ | |
540 | static int write_packet(struct usb_device *udev, | |
541 | u8 request, u8 * registers, u16 start, size_t size) | |
542 | { | |
543 | if (!registers || size <= 0) | |
544 | return -EINVAL; | |
545 | ||
546 | return usb_control_msg(udev, | |
547 | usb_sndctrlpipe(udev, 0), | |
548 | request, | |
549 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
550 | start, /* value */ | |
551 | 0, /* index */ | |
552 | registers, /* buffer */ | |
553 | size, | |
554 | HZ); | |
555 | } | |
556 | ||
557 | /**************************************************************************** | |
558 | * | |
559 | * read_packet | |
560 | * | |
561 | ***************************************************************************/ | |
562 | static int read_packet(struct usb_device *udev, | |
563 | u8 request, u8 * registers, u16 start, size_t size) | |
564 | { | |
565 | if (!registers || size <= 0) | |
566 | return -EINVAL; | |
567 | ||
568 | return usb_control_msg(udev, | |
569 | usb_rcvctrlpipe(udev, 0), | |
570 | request, | |
571 | USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE, | |
572 | start, /* value */ | |
573 | 0, /* index */ | |
574 | registers, /* buffer */ | |
575 | size, | |
576 | HZ); | |
577 | } | |
578 | ||
579 | /****************************************************************************** | |
580 | * | |
581 | * cpia2_usb_transfer_cmd | |
582 | * | |
583 | *****************************************************************************/ | |
584 | int cpia2_usb_transfer_cmd(struct camera_data *cam, | |
585 | void *registers, | |
586 | u8 request, u8 start, u8 count, u8 direction) | |
587 | { | |
588 | int err = 0; | |
589 | struct usb_device *udev = cam->dev; | |
590 | ||
591 | if (!udev) { | |
592 | ERR("%s: Internal driver error: udev is NULL\n", __func__); | |
593 | return -EINVAL; | |
594 | } | |
595 | ||
596 | if (!registers) { | |
597 | ERR("%s: Internal driver error: register array is NULL\n", __func__); | |
598 | return -EINVAL; | |
599 | } | |
600 | ||
601 | if (direction == TRANSFER_READ) { | |
602 | err = read_packet(udev, request, (u8 *)registers, start, count); | |
603 | if (err > 0) | |
604 | err = 0; | |
605 | } else if (direction == TRANSFER_WRITE) { | |
606 | err =write_packet(udev, request, (u8 *)registers, start, count); | |
607 | if (err < 0) { | |
608 | LOG("Control message failed, err val = %d\n", err); | |
609 | LOG("Message: request = 0x%0X, start = 0x%0X\n", | |
610 | request, start); | |
611 | LOG("Message: count = %d, register[0] = 0x%0X\n", | |
612 | count, ((unsigned char *) registers)[0]); | |
613 | } else | |
614 | err=0; | |
615 | } else { | |
616 | LOG("Unexpected first byte of direction: %d\n", | |
617 | direction); | |
618 | return -EINVAL; | |
619 | } | |
620 | ||
621 | if(err != 0) | |
622 | LOG("Unexpected error: %d\n", err); | |
623 | return err; | |
624 | } | |
625 | ||
626 | ||
627 | /****************************************************************************** | |
628 | * | |
629 | * submit_urbs | |
630 | * | |
631 | *****************************************************************************/ | |
632 | static int submit_urbs(struct camera_data *cam) | |
633 | { | |
634 | struct urb *urb; | |
635 | int fx, err, i; | |
636 | ||
637 | for(i=0; i<NUM_SBUF; ++i) { | |
638 | if (cam->sbuf[i].data) | |
639 | continue; | |
640 | cam->sbuf[i].data = | |
641 | kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL); | |
642 | if (!cam->sbuf[i].data) { | |
643 | return -ENOMEM; | |
644 | } | |
645 | } | |
646 | ||
647 | /* We double buffer the Isoc lists, and also know the polling | |
648 | * interval is every frame (1 == (1 << (bInterval -1))). | |
649 | */ | |
650 | for(i=0; i<NUM_SBUF; ++i) { | |
651 | if(cam->sbuf[i].urb) { | |
652 | continue; | |
653 | } | |
654 | urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); | |
655 | if (!urb) { | |
656 | return -ENOMEM; | |
657 | } | |
658 | ||
659 | cam->sbuf[i].urb = urb; | |
660 | urb->dev = cam->dev; | |
661 | urb->context = cam; | |
662 | urb->pipe = usb_rcvisocpipe(cam->dev, 1 /*ISOC endpoint*/); | |
663 | urb->transfer_flags = URB_ISO_ASAP; | |
664 | urb->transfer_buffer = cam->sbuf[i].data; | |
665 | urb->complete = cpia2_usb_complete; | |
666 | urb->number_of_packets = FRAMES_PER_DESC; | |
667 | urb->interval = 1; | |
668 | urb->transfer_buffer_length = | |
669 | FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; | |
670 | ||
671 | for (fx = 0; fx < FRAMES_PER_DESC; fx++) { | |
672 | urb->iso_frame_desc[fx].offset = | |
673 | FRAME_SIZE_PER_DESC * fx; | |
674 | urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; | |
675 | } | |
676 | } | |
677 | ||
678 | ||
679 | /* Queue the ISO urbs, and resubmit in the completion handler */ | |
680 | for(i=0; i<NUM_SBUF; ++i) { | |
681 | err = usb_submit_urb(cam->sbuf[i].urb, GFP_KERNEL); | |
682 | if (err) { | |
683 | ERR("usb_submit_urb[%d]() = %d\n", i, err); | |
684 | return err; | |
685 | } | |
686 | } | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | /****************************************************************************** | |
692 | * | |
693 | * cpia2_usb_stream_start | |
694 | * | |
695 | *****************************************************************************/ | |
696 | int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate) | |
697 | { | |
698 | int ret; | |
699 | int old_alt; | |
700 | ||
701 | if(cam->streaming) | |
702 | return 0; | |
703 | ||
704 | if (cam->flush) { | |
705 | int i; | |
706 | DBG("Flushing buffers\n"); | |
707 | for(i=0; i<cam->num_frames; ++i) { | |
708 | cam->buffers[i].status = FRAME_EMPTY; | |
709 | cam->buffers[i].length = 0; | |
710 | } | |
711 | cam->curbuff = &cam->buffers[0]; | |
712 | cam->workbuff = cam->curbuff->next; | |
713 | cam->flush = false; | |
714 | } | |
715 | ||
716 | old_alt = cam->params.camera_state.stream_mode; | |
717 | cam->params.camera_state.stream_mode = 0; | |
718 | ret = cpia2_usb_change_streaming_alternate(cam, alternate); | |
719 | if (ret < 0) { | |
720 | int ret2; | |
721 | ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret); | |
722 | cam->params.camera_state.stream_mode = old_alt; | |
723 | ret2 = set_alternate(cam, USBIF_CMDONLY); | |
724 | if (ret2 < 0) { | |
725 | ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already " | |
726 | "failed. Then tried to call " | |
727 | "set_alternate(USBIF_CMDONLY) = %d.\n", | |
728 | alternate, ret, ret2); | |
729 | } | |
730 | } else { | |
731 | cam->frame_count = 0; | |
732 | cam->streaming = 1; | |
733 | ret = cpia2_usb_stream_resume(cam); | |
734 | } | |
735 | return ret; | |
736 | } | |
737 | ||
738 | /****************************************************************************** | |
739 | * | |
740 | * cpia2_usb_stream_pause | |
741 | * | |
742 | *****************************************************************************/ | |
743 | int cpia2_usb_stream_pause(struct camera_data *cam) | |
744 | { | |
745 | int ret = 0; | |
746 | if(cam->streaming) { | |
747 | ret = set_alternate(cam, USBIF_CMDONLY); | |
748 | free_sbufs(cam); | |
749 | } | |
750 | return ret; | |
751 | } | |
752 | ||
753 | /****************************************************************************** | |
754 | * | |
755 | * cpia2_usb_stream_resume | |
756 | * | |
757 | *****************************************************************************/ | |
758 | int cpia2_usb_stream_resume(struct camera_data *cam) | |
759 | { | |
760 | int ret = 0; | |
761 | if(cam->streaming) { | |
762 | cam->first_image_seen = 0; | |
763 | ret = set_alternate(cam, cam->params.camera_state.stream_mode); | |
764 | if(ret == 0) { | |
765 | ret = submit_urbs(cam); | |
766 | } | |
767 | } | |
768 | return ret; | |
769 | } | |
770 | ||
771 | /****************************************************************************** | |
772 | * | |
773 | * cpia2_usb_stream_stop | |
774 | * | |
775 | *****************************************************************************/ | |
776 | int cpia2_usb_stream_stop(struct camera_data *cam) | |
777 | { | |
778 | int ret; | |
779 | ret = cpia2_usb_stream_pause(cam); | |
780 | cam->streaming = 0; | |
781 | configure_transfer_mode(cam, 0); | |
782 | return ret; | |
783 | } | |
784 | ||
785 | /****************************************************************************** | |
786 | * | |
787 | * cpia2_usb_probe | |
788 | * | |
789 | * Probe and initialize. | |
790 | *****************************************************************************/ | |
791 | static int cpia2_usb_probe(struct usb_interface *intf, | |
792 | const struct usb_device_id *id) | |
793 | { | |
794 | struct usb_device *udev = interface_to_usbdev(intf); | |
795 | struct usb_interface_descriptor *interface; | |
796 | struct camera_data *cam; | |
797 | int ret; | |
798 | ||
799 | /* A multi-config CPiA2 camera? */ | |
800 | if (udev->descriptor.bNumConfigurations != 1) | |
801 | return -ENODEV; | |
802 | interface = &intf->cur_altsetting->desc; | |
803 | ||
804 | /* If we get to this point, we found a CPiA2 camera */ | |
805 | LOG("CPiA2 USB camera found\n"); | |
806 | ||
807 | if((cam = cpia2_init_camera_struct()) == NULL) | |
808 | return -ENOMEM; | |
809 | ||
810 | cam->dev = udev; | |
811 | cam->iface = interface->bInterfaceNumber; | |
812 | ||
813 | ret = set_alternate(cam, USBIF_CMDONLY); | |
814 | if (ret < 0) { | |
815 | ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret); | |
816 | kfree(cam); | |
817 | return ret; | |
818 | } | |
819 | ||
820 | if ((ret = cpia2_register_camera(cam)) < 0) { | |
821 | ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret); | |
822 | kfree(cam); | |
823 | return ret; | |
824 | } | |
825 | ||
826 | ||
827 | if((ret = cpia2_init_camera(cam)) < 0) { | |
828 | ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret); | |
829 | cpia2_unregister_camera(cam); | |
830 | kfree(cam); | |
831 | return ret; | |
832 | } | |
833 | LOG(" CPiA Version: %d.%02d (%d.%d)\n", | |
834 | cam->params.version.firmware_revision_hi, | |
835 | cam->params.version.firmware_revision_lo, | |
836 | cam->params.version.asic_id, | |
837 | cam->params.version.asic_rev); | |
838 | LOG(" CPiA PnP-ID: %04x:%04x:%04x\n", | |
839 | cam->params.pnp_id.vendor, | |
840 | cam->params.pnp_id.product, | |
841 | cam->params.pnp_id.device_revision); | |
842 | LOG(" SensorID: %d.(version %d)\n", | |
843 | cam->params.version.sensor_flags, | |
844 | cam->params.version.sensor_rev); | |
845 | ||
846 | usb_set_intfdata(intf, cam); | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | /****************************************************************************** | |
852 | * | |
853 | * cpia2_disconnect | |
854 | * | |
855 | *****************************************************************************/ | |
856 | static void cpia2_usb_disconnect(struct usb_interface *intf) | |
857 | { | |
858 | struct camera_data *cam = usb_get_intfdata(intf); | |
859 | usb_set_intfdata(intf, NULL); | |
860 | cam->present = 0; | |
861 | ||
862 | DBG("Stopping stream\n"); | |
863 | cpia2_usb_stream_stop(cam); | |
864 | ||
865 | DBG("Unregistering camera\n"); | |
866 | cpia2_unregister_camera(cam); | |
867 | ||
868 | if(cam->buffers) { | |
869 | DBG("Wakeup waiting processes\n"); | |
870 | cam->curbuff->status = FRAME_READY; | |
871 | cam->curbuff->length = 0; | |
872 | if (waitqueue_active(&cam->wq_stream)) | |
873 | wake_up_interruptible(&cam->wq_stream); | |
874 | } | |
875 | ||
876 | DBG("Releasing interface\n"); | |
877 | usb_driver_release_interface(&cpia2_driver, intf); | |
878 | ||
879 | if (cam->open_count == 0) { | |
880 | DBG("Freeing camera structure\n"); | |
881 | kfree(cam); | |
882 | } | |
883 | ||
884 | LOG("CPiA2 camera disconnected.\n"); | |
885 | } | |
886 | ||
887 | ||
888 | /****************************************************************************** | |
889 | * | |
890 | * usb_cpia2_init | |
891 | * | |
892 | *****************************************************************************/ | |
893 | int cpia2_usb_init(void) | |
894 | { | |
895 | return usb_register(&cpia2_driver); | |
896 | } | |
897 | ||
898 | /****************************************************************************** | |
899 | * | |
900 | * usb_cpia_cleanup | |
901 | * | |
902 | *****************************************************************************/ | |
903 | void cpia2_usb_cleanup(void) | |
904 | { | |
905 | schedule_timeout(2 * HZ); | |
906 | usb_deregister(&cpia2_driver); | |
907 | } |