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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 | |
d9b01449 | 28 | * Alan Cox <alan@lxorguk.ukuu.org.uk> |
ab33d507 AC |
29 | ****************************************************************************/ |
30 | ||
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/usb.h> | |
7a707b89 | 34 | #include <linux/module.h> |
ab33d507 AC |
35 | |
36 | #include "cpia2.h" | |
37 | ||
38 | static int frame_sizes[] = { | |
39 | 0, // USBIF_CMDONLY | |
40 | 0, // USBIF_BULK | |
41 | 128, // USBIF_ISO_1 | |
42 | 384, // USBIF_ISO_2 | |
43 | 640, // USBIF_ISO_3 | |
44 | 768, // USBIF_ISO_4 | |
45 | 896, // USBIF_ISO_5 | |
46 | 1023, // USBIF_ISO_6 | |
47 | }; | |
48 | ||
49 | #define FRAMES_PER_DESC 10 | |
50 | #define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt] | |
51 | ||
52 | static void process_frame(struct camera_data *cam); | |
7d12e780 | 53 | static void cpia2_usb_complete(struct urb *urb); |
ab33d507 AC |
54 | static int cpia2_usb_probe(struct usb_interface *intf, |
55 | const struct usb_device_id *id); | |
56 | static void cpia2_usb_disconnect(struct usb_interface *intf); | |
6c493f8b HV |
57 | static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message); |
58 | static int cpia2_usb_resume(struct usb_interface *intf); | |
ab33d507 AC |
59 | |
60 | static void free_sbufs(struct camera_data *cam); | |
61 | static void add_APPn(struct camera_data *cam); | |
62 | static void add_COM(struct camera_data *cam); | |
63 | static int submit_urbs(struct camera_data *cam); | |
64 | static int set_alternate(struct camera_data *cam, unsigned int alt); | |
65 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt); | |
66 | ||
67 | static struct usb_device_id cpia2_id_table[] = { | |
68 | {USB_DEVICE(0x0553, 0x0100)}, | |
69 | {USB_DEVICE(0x0553, 0x0140)}, | |
70 | {USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */ | |
71 | {} /* Terminating entry */ | |
72 | }; | |
73 | MODULE_DEVICE_TABLE(usb, cpia2_id_table); | |
74 | ||
75 | static struct usb_driver cpia2_driver = { | |
76 | .name = "cpia2", | |
77 | .probe = cpia2_usb_probe, | |
78 | .disconnect = cpia2_usb_disconnect, | |
6c493f8b HV |
79 | .suspend = cpia2_usb_suspend, |
80 | .resume = cpia2_usb_resume, | |
81 | .reset_resume = cpia2_usb_resume, | |
ab33d507 AC |
82 | .id_table = cpia2_id_table |
83 | }; | |
84 | ||
85 | ||
86 | /****************************************************************************** | |
87 | * | |
88 | * process_frame | |
89 | * | |
90 | *****************************************************************************/ | |
91 | static void process_frame(struct camera_data *cam) | |
92 | { | |
ff699e6b | 93 | static int frame_count; |
ab33d507 AC |
94 | |
95 | unsigned char *inbuff = cam->workbuff->data; | |
96 | ||
97 | DBG("Processing frame #%d, current:%d\n", | |
98 | cam->workbuff->num, cam->curbuff->num); | |
99 | ||
100 | if(cam->workbuff->length > cam->workbuff->max_length) | |
101 | cam->workbuff->max_length = cam->workbuff->length; | |
102 | ||
103 | if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) { | |
104 | frame_count++; | |
105 | } else { | |
106 | cam->workbuff->status = FRAME_ERROR; | |
107 | DBG("Start of frame not found\n"); | |
108 | return; | |
109 | } | |
110 | ||
111 | /*** | |
112 | * Now the output buffer should have a JPEG image in it. | |
113 | ***/ | |
114 | if(!cam->first_image_seen) { | |
115 | /* Always skip the first image after streaming | |
116 | * starts. It is almost certainly corrupt. */ | |
117 | cam->first_image_seen = 1; | |
118 | cam->workbuff->status = FRAME_EMPTY; | |
119 | return; | |
120 | } | |
121 | if (cam->workbuff->length > 3) { | |
122 | if(cam->mmapped && | |
123 | cam->workbuff->length < cam->workbuff->max_length) { | |
124 | /* No junk in the buffers */ | |
125 | memset(cam->workbuff->data+cam->workbuff->length, | |
126 | 0, cam->workbuff->max_length- | |
127 | cam->workbuff->length); | |
128 | } | |
129 | cam->workbuff->max_length = cam->workbuff->length; | |
130 | cam->workbuff->status = FRAME_READY; | |
131 | ||
132 | if(!cam->mmapped && cam->num_frames > 2) { | |
133 | /* During normal reading, the most recent | |
134 | * frame will be read. If the current frame | |
135 | * hasn't started reading yet, it will never | |
136 | * be read, so mark it empty. If the buffer is | |
137 | * mmapped, or we have few buffers, we need to | |
138 | * wait for the user to free the buffer. | |
139 | * | |
140 | * NOTE: This is not entirely foolproof with 3 | |
141 | * buffers, but it would take an EXTREMELY | |
142 | * overloaded system to cause problems (possible | |
143 | * image data corruption). Basically, it would | |
144 | * need to take more time to execute cpia2_read | |
145 | * than it would for the camera to send | |
146 | * cam->num_frames-2 frames before problems | |
147 | * could occur. | |
148 | */ | |
149 | cam->curbuff->status = FRAME_EMPTY; | |
150 | } | |
151 | cam->curbuff = cam->workbuff; | |
152 | cam->workbuff = cam->workbuff->next; | |
153 | DBG("Changed buffers, work:%d, current:%d\n", | |
154 | cam->workbuff->num, cam->curbuff->num); | |
155 | return; | |
156 | } else { | |
157 | DBG("Not enough data for an image.\n"); | |
158 | } | |
159 | ||
160 | cam->workbuff->status = FRAME_ERROR; | |
161 | return; | |
162 | } | |
163 | ||
164 | /****************************************************************************** | |
165 | * | |
166 | * add_APPn | |
167 | * | |
168 | * Adds a user specified APPn record | |
169 | *****************************************************************************/ | |
170 | static void add_APPn(struct camera_data *cam) | |
171 | { | |
172 | if(cam->APP_len > 0) { | |
173 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; | |
174 | cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn; | |
175 | cam->workbuff->data[cam->workbuff->length++] = 0; | |
176 | cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2; | |
177 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
178 | cam->APP_data, cam->APP_len); | |
179 | cam->workbuff->length += cam->APP_len; | |
180 | } | |
181 | } | |
182 | ||
183 | /****************************************************************************** | |
184 | * | |
185 | * add_COM | |
186 | * | |
187 | * Adds a user specified COM record | |
188 | *****************************************************************************/ | |
189 | static void add_COM(struct camera_data *cam) | |
190 | { | |
191 | if(cam->COM_len > 0) { | |
192 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; | |
193 | cam->workbuff->data[cam->workbuff->length++] = 0xFE; | |
194 | cam->workbuff->data[cam->workbuff->length++] = 0; | |
195 | cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2; | |
196 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
197 | cam->COM_data, cam->COM_len); | |
198 | cam->workbuff->length += cam->COM_len; | |
199 | } | |
200 | } | |
201 | ||
202 | /****************************************************************************** | |
203 | * | |
204 | * cpia2_usb_complete | |
205 | * | |
206 | * callback when incoming packet is received | |
207 | *****************************************************************************/ | |
7d12e780 | 208 | static void cpia2_usb_complete(struct urb *urb) |
ab33d507 AC |
209 | { |
210 | int i; | |
211 | unsigned char *cdata; | |
b5eee196 | 212 | static bool frame_ready = false; |
ab33d507 AC |
213 | struct camera_data *cam = (struct camera_data *) urb->context; |
214 | ||
215 | if (urb->status!=0) { | |
216 | if (!(urb->status == -ENOENT || | |
217 | urb->status == -ECONNRESET || | |
218 | urb->status == -ESHUTDOWN)) | |
219 | { | |
220 | DBG("urb->status = %d!\n", urb->status); | |
221 | } | |
222 | DBG("Stopping streaming\n"); | |
223 | return; | |
224 | } | |
225 | ||
6c493f8b HV |
226 | if (!cam->streaming || !video_is_registered(&cam->vdev)) { |
227 | LOG("Will now stop the streaming: streaming = %d, present=%d\n", | |
228 | cam->streaming, video_is_registered(&cam->vdev)); | |
ab33d507 AC |
229 | return; |
230 | } | |
231 | ||
232 | /*** | |
233 | * Packet collater | |
234 | ***/ | |
235 | //DBG("Collating %d packets\n", urb->number_of_packets); | |
236 | for (i = 0; i < urb->number_of_packets; i++) { | |
237 | u16 checksum, iso_checksum; | |
238 | int j; | |
239 | int n = urb->iso_frame_desc[i].actual_length; | |
240 | int st = urb->iso_frame_desc[i].status; | |
241 | ||
242 | if(cam->workbuff->status == FRAME_READY) { | |
243 | struct framebuf *ptr; | |
244 | /* Try to find an available buffer */ | |
245 | DBG("workbuff full, searching\n"); | |
246 | for (ptr = cam->workbuff->next; | |
247 | ptr != cam->workbuff; | |
248 | ptr = ptr->next) | |
249 | { | |
250 | if (ptr->status == FRAME_EMPTY) { | |
251 | ptr->status = FRAME_READING; | |
252 | ptr->length = 0; | |
253 | break; | |
254 | } | |
255 | } | |
256 | if (ptr == cam->workbuff) | |
257 | break; /* No READING or EMPTY buffers left */ | |
258 | ||
259 | cam->workbuff = ptr; | |
260 | } | |
261 | ||
262 | if (cam->workbuff->status == FRAME_EMPTY || | |
263 | cam->workbuff->status == FRAME_ERROR) { | |
264 | cam->workbuff->status = FRAME_READING; | |
265 | cam->workbuff->length = 0; | |
266 | } | |
267 | ||
268 | //DBG(" Packet %d length = %d, status = %d\n", i, n, st); | |
269 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
270 | ||
271 | if (st) { | |
272 | LOG("cpia2 data error: [%d] len=%d, status = %d\n", | |
273 | i, n, st); | |
274 | if(!ALLOW_CORRUPT) | |
275 | cam->workbuff->status = FRAME_ERROR; | |
276 | continue; | |
277 | } | |
278 | ||
279 | if(n<=2) | |
280 | continue; | |
281 | ||
282 | checksum = 0; | |
283 | for(j=0; j<n-2; ++j) | |
284 | checksum += cdata[j]; | |
285 | iso_checksum = cdata[j] + cdata[j+1]*256; | |
286 | if(checksum != iso_checksum) { | |
287 | LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n", | |
288 | i, n, (int)checksum, (int)iso_checksum); | |
289 | if(!ALLOW_CORRUPT) { | |
290 | cam->workbuff->status = FRAME_ERROR; | |
291 | continue; | |
292 | } | |
293 | } | |
294 | n -= 2; | |
295 | ||
296 | if(cam->workbuff->status != FRAME_READING) { | |
297 | if((0xFF == cdata[0] && 0xD8 == cdata[1]) || | |
298 | (0xD8 == cdata[0] && 0xFF == cdata[1] && | |
299 | 0 != cdata[2])) { | |
300 | /* frame is skipped, but increment total | |
301 | * frame count anyway */ | |
302 | cam->frame_count++; | |
303 | } | |
304 | DBG("workbuff not reading, status=%d\n", | |
305 | cam->workbuff->status); | |
306 | continue; | |
307 | } | |
308 | ||
309 | if (cam->frame_size < cam->workbuff->length + n) { | |
310 | ERR("buffer overflow! length: %d, n: %d\n", | |
311 | cam->workbuff->length, n); | |
312 | cam->workbuff->status = FRAME_ERROR; | |
313 | if(cam->workbuff->length > cam->workbuff->max_length) | |
314 | cam->workbuff->max_length = | |
315 | cam->workbuff->length; | |
316 | continue; | |
317 | } | |
318 | ||
319 | if (cam->workbuff->length == 0) { | |
320 | int data_offset; | |
321 | if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) { | |
322 | data_offset = 1; | |
323 | } else if((0xFF == cdata[0]) && (0xD8 == cdata[1]) | |
324 | && (0xFF == cdata[2])) { | |
325 | data_offset = 2; | |
326 | } else { | |
327 | DBG("Ignoring packet, not beginning!\n"); | |
328 | continue; | |
329 | } | |
330 | DBG("Start of frame pattern found\n"); | |
8e6057b5 | 331 | v4l2_get_timestamp(&cam->workbuff->timestamp); |
ab33d507 AC |
332 | cam->workbuff->seq = cam->frame_count++; |
333 | cam->workbuff->data[0] = 0xFF; | |
334 | cam->workbuff->data[1] = 0xD8; | |
335 | cam->workbuff->length = 2; | |
336 | add_APPn(cam); | |
337 | add_COM(cam); | |
338 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
339 | cdata+data_offset, n-data_offset); | |
340 | cam->workbuff->length += n-data_offset; | |
341 | } else if (cam->workbuff->length > 0) { | |
342 | memcpy(cam->workbuff->data + cam->workbuff->length, | |
343 | cdata, n); | |
344 | cam->workbuff->length += n; | |
345 | } | |
346 | ||
347 | if ((cam->workbuff->length >= 3) && | |
348 | (cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) && | |
349 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) && | |
350 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) { | |
351 | frame_ready = true; | |
352 | cam->workbuff->data[cam->workbuff->length - 1] = 0; | |
353 | cam->workbuff->length -= 1; | |
354 | } else if ((cam->workbuff->length >= 2) && | |
355 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) && | |
356 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) { | |
357 | frame_ready = true; | |
358 | } | |
359 | ||
360 | if (frame_ready) { | |
361 | DBG("Workbuff image size = %d\n",cam->workbuff->length); | |
362 | process_frame(cam); | |
363 | ||
364 | frame_ready = false; | |
365 | ||
366 | if (waitqueue_active(&cam->wq_stream)) | |
367 | wake_up_interruptible(&cam->wq_stream); | |
368 | } | |
369 | } | |
370 | ||
371 | if(cam->streaming) { | |
372 | /* resubmit */ | |
373 | urb->dev = cam->dev; | |
374 | if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) | |
375 | ERR("%s: usb_submit_urb ret %d!\n", __func__, i); | |
376 | } | |
377 | } | |
378 | ||
379 | /****************************************************************************** | |
380 | * | |
381 | * configure_transfer_mode | |
382 | * | |
383 | *****************************************************************************/ | |
384 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt) | |
385 | { | |
386 | static unsigned char iso_regs[8][4] = { | |
387 | {0x00, 0x00, 0x00, 0x00}, | |
388 | {0x00, 0x00, 0x00, 0x00}, | |
389 | {0xB9, 0x00, 0x00, 0x7E}, | |
390 | {0xB9, 0x00, 0x01, 0x7E}, | |
391 | {0xB9, 0x00, 0x02, 0x7E}, | |
392 | {0xB9, 0x00, 0x02, 0xFE}, | |
393 | {0xB9, 0x00, 0x03, 0x7E}, | |
394 | {0xB9, 0x00, 0x03, 0xFD} | |
395 | }; | |
396 | struct cpia2_command cmd; | |
397 | unsigned char reg; | |
398 | ||
6c493f8b | 399 | if (!video_is_registered(&cam->vdev)) |
ab33d507 AC |
400 | return -ENODEV; |
401 | ||
402 | /*** | |
403 | * Write the isoc registers according to the alternate selected | |
404 | ***/ | |
405 | cmd.direction = TRANSFER_WRITE; | |
406 | cmd.buffer.block_data[0] = iso_regs[alt][0]; | |
407 | cmd.buffer.block_data[1] = iso_regs[alt][1]; | |
408 | cmd.buffer.block_data[2] = iso_regs[alt][2]; | |
409 | cmd.buffer.block_data[3] = iso_regs[alt][3]; | |
410 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
411 | cmd.start = CPIA2_VC_USB_ISOLIM; | |
412 | cmd.reg_count = 4; | |
413 | cpia2_send_command(cam, &cmd); | |
414 | ||
415 | /*** | |
416 | * Enable relevant streams before starting polling. | |
417 | * First read USB Stream Config Register. | |
418 | ***/ | |
419 | cmd.direction = TRANSFER_READ; | |
420 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
421 | cmd.start = CPIA2_VC_USB_STRM; | |
422 | cmd.reg_count = 1; | |
423 | cpia2_send_command(cam, &cmd); | |
424 | reg = cmd.buffer.block_data[0]; | |
425 | ||
426 | /* Clear iso, bulk, and int */ | |
427 | reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE | | |
428 | CPIA2_VC_USB_STRM_ISO_ENABLE | | |
429 | CPIA2_VC_USB_STRM_INT_ENABLE); | |
430 | ||
431 | if (alt == USBIF_BULK) { | |
432 | DBG("Enabling bulk xfer\n"); | |
433 | reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */ | |
434 | cam->xfer_mode = XFER_BULK; | |
435 | } else if (alt >= USBIF_ISO_1) { | |
436 | DBG("Enabling ISOC xfer\n"); | |
437 | reg |= CPIA2_VC_USB_STRM_ISO_ENABLE; | |
438 | cam->xfer_mode = XFER_ISOC; | |
439 | } | |
440 | ||
441 | cmd.buffer.block_data[0] = reg; | |
442 | cmd.direction = TRANSFER_WRITE; | |
443 | cmd.start = CPIA2_VC_USB_STRM; | |
444 | cmd.reg_count = 1; | |
445 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
446 | cpia2_send_command(cam, &cmd); | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
451 | /****************************************************************************** | |
452 | * | |
453 | * cpia2_usb_change_streaming_alternate | |
454 | * | |
455 | *****************************************************************************/ | |
456 | int cpia2_usb_change_streaming_alternate(struct camera_data *cam, | |
457 | unsigned int alt) | |
458 | { | |
459 | int ret = 0; | |
460 | ||
461 | if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6) | |
462 | return -EINVAL; | |
463 | ||
464 | if(alt == cam->params.camera_state.stream_mode) | |
465 | return 0; | |
466 | ||
467 | cpia2_usb_stream_pause(cam); | |
468 | ||
469 | configure_transfer_mode(cam, alt); | |
470 | ||
471 | cam->params.camera_state.stream_mode = alt; | |
472 | ||
473 | /* Reset the camera to prevent image quality degradation */ | |
474 | cpia2_reset_camera(cam); | |
475 | ||
476 | cpia2_usb_stream_resume(cam); | |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
481 | /****************************************************************************** | |
482 | * | |
483 | * set_alternate | |
484 | * | |
485 | *****************************************************************************/ | |
d45b9b8a | 486 | static int set_alternate(struct camera_data *cam, unsigned int alt) |
ab33d507 AC |
487 | { |
488 | int ret = 0; | |
489 | ||
490 | if(alt == cam->cur_alt) | |
491 | return 0; | |
492 | ||
493 | if (cam->cur_alt != USBIF_CMDONLY) { | |
494 | DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY); | |
495 | ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY); | |
496 | if (ret != 0) | |
497 | return ret; | |
498 | } | |
499 | if (alt != USBIF_CMDONLY) { | |
500 | DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt); | |
501 | ret = usb_set_interface(cam->dev, cam->iface, alt); | |
502 | if (ret != 0) | |
503 | return ret; | |
504 | } | |
505 | ||
506 | cam->old_alt = cam->cur_alt; | |
507 | cam->cur_alt = alt; | |
508 | ||
509 | return ret; | |
510 | } | |
511 | ||
512 | /****************************************************************************** | |
513 | * | |
514 | * free_sbufs | |
515 | * | |
516 | * Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL | |
517 | * are assumed to be allocated. Non-NULL .urb members are also assumed to be | |
518 | * submitted (and must therefore be killed before they are freed). | |
519 | *****************************************************************************/ | |
520 | static void free_sbufs(struct camera_data *cam) | |
521 | { | |
522 | int i; | |
523 | ||
524 | for (i = 0; i < NUM_SBUF; i++) { | |
525 | if(cam->sbuf[i].urb) { | |
526 | usb_kill_urb(cam->sbuf[i].urb); | |
527 | usb_free_urb(cam->sbuf[i].urb); | |
528 | cam->sbuf[i].urb = NULL; | |
529 | } | |
530 | if(cam->sbuf[i].data) { | |
531 | kfree(cam->sbuf[i].data); | |
532 | cam->sbuf[i].data = NULL; | |
533 | } | |
534 | } | |
535 | } | |
536 | ||
537 | /******* | |
538 | * Convenience functions | |
539 | *******/ | |
540 | /**************************************************************************** | |
541 | * | |
542 | * write_packet | |
543 | * | |
544 | ***************************************************************************/ | |
545 | static int write_packet(struct usb_device *udev, | |
546 | u8 request, u8 * registers, u16 start, size_t size) | |
547 | { | |
548 | if (!registers || size <= 0) | |
549 | return -EINVAL; | |
550 | ||
551 | return usb_control_msg(udev, | |
552 | usb_sndctrlpipe(udev, 0), | |
553 | request, | |
554 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
555 | start, /* value */ | |
556 | 0, /* index */ | |
557 | registers, /* buffer */ | |
558 | size, | |
559 | HZ); | |
560 | } | |
561 | ||
562 | /**************************************************************************** | |
563 | * | |
564 | * read_packet | |
565 | * | |
566 | ***************************************************************************/ | |
567 | static int read_packet(struct usb_device *udev, | |
568 | u8 request, u8 * registers, u16 start, size_t size) | |
569 | { | |
570 | if (!registers || size <= 0) | |
571 | return -EINVAL; | |
572 | ||
573 | return usb_control_msg(udev, | |
574 | usb_rcvctrlpipe(udev, 0), | |
575 | request, | |
576 | USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE, | |
577 | start, /* value */ | |
578 | 0, /* index */ | |
579 | registers, /* buffer */ | |
580 | size, | |
581 | HZ); | |
582 | } | |
583 | ||
584 | /****************************************************************************** | |
585 | * | |
586 | * cpia2_usb_transfer_cmd | |
587 | * | |
588 | *****************************************************************************/ | |
589 | int cpia2_usb_transfer_cmd(struct camera_data *cam, | |
590 | void *registers, | |
591 | u8 request, u8 start, u8 count, u8 direction) | |
592 | { | |
593 | int err = 0; | |
594 | struct usb_device *udev = cam->dev; | |
595 | ||
596 | if (!udev) { | |
597 | ERR("%s: Internal driver error: udev is NULL\n", __func__); | |
598 | return -EINVAL; | |
599 | } | |
600 | ||
601 | if (!registers) { | |
602 | ERR("%s: Internal driver error: register array is NULL\n", __func__); | |
603 | return -EINVAL; | |
604 | } | |
605 | ||
606 | if (direction == TRANSFER_READ) { | |
607 | err = read_packet(udev, request, (u8 *)registers, start, count); | |
608 | if (err > 0) | |
609 | err = 0; | |
610 | } else if (direction == TRANSFER_WRITE) { | |
611 | err =write_packet(udev, request, (u8 *)registers, start, count); | |
612 | if (err < 0) { | |
613 | LOG("Control message failed, err val = %d\n", err); | |
614 | LOG("Message: request = 0x%0X, start = 0x%0X\n", | |
615 | request, start); | |
616 | LOG("Message: count = %d, register[0] = 0x%0X\n", | |
617 | count, ((unsigned char *) registers)[0]); | |
618 | } else | |
619 | err=0; | |
620 | } else { | |
621 | LOG("Unexpected first byte of direction: %d\n", | |
622 | direction); | |
623 | return -EINVAL; | |
624 | } | |
625 | ||
626 | if(err != 0) | |
627 | LOG("Unexpected error: %d\n", err); | |
628 | return err; | |
629 | } | |
630 | ||
631 | ||
632 | /****************************************************************************** | |
633 | * | |
634 | * submit_urbs | |
635 | * | |
636 | *****************************************************************************/ | |
637 | static int submit_urbs(struct camera_data *cam) | |
638 | { | |
639 | struct urb *urb; | |
beeb82be | 640 | int fx, err, i, j; |
ab33d507 AC |
641 | |
642 | for(i=0; i<NUM_SBUF; ++i) { | |
643 | if (cam->sbuf[i].data) | |
644 | continue; | |
645 | cam->sbuf[i].data = | |
646 | kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL); | |
647 | if (!cam->sbuf[i].data) { | |
d82d418a AC |
648 | while (--i >= 0) { |
649 | kfree(cam->sbuf[i].data); | |
650 | cam->sbuf[i].data = NULL; | |
651 | } | |
ab33d507 AC |
652 | return -ENOMEM; |
653 | } | |
654 | } | |
655 | ||
656 | /* We double buffer the Isoc lists, and also know the polling | |
657 | * interval is every frame (1 == (1 << (bInterval -1))). | |
658 | */ | |
659 | for(i=0; i<NUM_SBUF; ++i) { | |
660 | if(cam->sbuf[i].urb) { | |
661 | continue; | |
662 | } | |
663 | urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); | |
664 | if (!urb) { | |
beeb82be DSL |
665 | for (j = 0; j < i; j++) |
666 | usb_free_urb(cam->sbuf[j].urb); | |
ab33d507 AC |
667 | return -ENOMEM; |
668 | } | |
669 | ||
670 | cam->sbuf[i].urb = urb; | |
671 | urb->dev = cam->dev; | |
672 | urb->context = cam; | |
673 | urb->pipe = usb_rcvisocpipe(cam->dev, 1 /*ISOC endpoint*/); | |
674 | urb->transfer_flags = URB_ISO_ASAP; | |
675 | urb->transfer_buffer = cam->sbuf[i].data; | |
676 | urb->complete = cpia2_usb_complete; | |
677 | urb->number_of_packets = FRAMES_PER_DESC; | |
678 | urb->interval = 1; | |
679 | urb->transfer_buffer_length = | |
680 | FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; | |
681 | ||
682 | for (fx = 0; fx < FRAMES_PER_DESC; fx++) { | |
683 | urb->iso_frame_desc[fx].offset = | |
684 | FRAME_SIZE_PER_DESC * fx; | |
685 | urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; | |
686 | } | |
687 | } | |
688 | ||
689 | ||
690 | /* Queue the ISO urbs, and resubmit in the completion handler */ | |
691 | for(i=0; i<NUM_SBUF; ++i) { | |
692 | err = usb_submit_urb(cam->sbuf[i].urb, GFP_KERNEL); | |
693 | if (err) { | |
694 | ERR("usb_submit_urb[%d]() = %d\n", i, err); | |
695 | return err; | |
696 | } | |
697 | } | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | /****************************************************************************** | |
703 | * | |
704 | * cpia2_usb_stream_start | |
705 | * | |
706 | *****************************************************************************/ | |
707 | int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate) | |
708 | { | |
709 | int ret; | |
710 | int old_alt; | |
711 | ||
712 | if(cam->streaming) | |
713 | return 0; | |
714 | ||
715 | if (cam->flush) { | |
716 | int i; | |
717 | DBG("Flushing buffers\n"); | |
718 | for(i=0; i<cam->num_frames; ++i) { | |
719 | cam->buffers[i].status = FRAME_EMPTY; | |
720 | cam->buffers[i].length = 0; | |
721 | } | |
722 | cam->curbuff = &cam->buffers[0]; | |
723 | cam->workbuff = cam->curbuff->next; | |
724 | cam->flush = false; | |
725 | } | |
726 | ||
727 | old_alt = cam->params.camera_state.stream_mode; | |
728 | cam->params.camera_state.stream_mode = 0; | |
729 | ret = cpia2_usb_change_streaming_alternate(cam, alternate); | |
730 | if (ret < 0) { | |
731 | int ret2; | |
732 | ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret); | |
733 | cam->params.camera_state.stream_mode = old_alt; | |
734 | ret2 = set_alternate(cam, USBIF_CMDONLY); | |
735 | if (ret2 < 0) { | |
736 | ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already " | |
737 | "failed. Then tried to call " | |
738 | "set_alternate(USBIF_CMDONLY) = %d.\n", | |
739 | alternate, ret, ret2); | |
740 | } | |
741 | } else { | |
742 | cam->frame_count = 0; | |
743 | cam->streaming = 1; | |
744 | ret = cpia2_usb_stream_resume(cam); | |
745 | } | |
746 | return ret; | |
747 | } | |
748 | ||
749 | /****************************************************************************** | |
750 | * | |
751 | * cpia2_usb_stream_pause | |
752 | * | |
753 | *****************************************************************************/ | |
754 | int cpia2_usb_stream_pause(struct camera_data *cam) | |
755 | { | |
756 | int ret = 0; | |
757 | if(cam->streaming) { | |
ab33d507 | 758 | free_sbufs(cam); |
6c493f8b | 759 | ret = set_alternate(cam, USBIF_CMDONLY); |
ab33d507 AC |
760 | } |
761 | return ret; | |
762 | } | |
763 | ||
764 | /****************************************************************************** | |
765 | * | |
766 | * cpia2_usb_stream_resume | |
767 | * | |
768 | *****************************************************************************/ | |
769 | int cpia2_usb_stream_resume(struct camera_data *cam) | |
770 | { | |
771 | int ret = 0; | |
772 | if(cam->streaming) { | |
773 | cam->first_image_seen = 0; | |
774 | ret = set_alternate(cam, cam->params.camera_state.stream_mode); | |
775 | if(ret == 0) { | |
6c493f8b HV |
776 | /* for some reason the user effects need to be set |
777 | again when starting streaming. */ | |
778 | cpia2_do_command(cam, CPIA2_CMD_SET_USER_EFFECTS, TRANSFER_WRITE, | |
779 | cam->params.vp_params.user_effects); | |
ab33d507 AC |
780 | ret = submit_urbs(cam); |
781 | } | |
782 | } | |
783 | return ret; | |
784 | } | |
785 | ||
786 | /****************************************************************************** | |
787 | * | |
788 | * cpia2_usb_stream_stop | |
789 | * | |
790 | *****************************************************************************/ | |
791 | int cpia2_usb_stream_stop(struct camera_data *cam) | |
792 | { | |
793 | int ret; | |
6c493f8b | 794 | |
ab33d507 AC |
795 | ret = cpia2_usb_stream_pause(cam); |
796 | cam->streaming = 0; | |
797 | configure_transfer_mode(cam, 0); | |
798 | return ret; | |
799 | } | |
800 | ||
801 | /****************************************************************************** | |
802 | * | |
803 | * cpia2_usb_probe | |
804 | * | |
805 | * Probe and initialize. | |
806 | *****************************************************************************/ | |
807 | static int cpia2_usb_probe(struct usb_interface *intf, | |
808 | const struct usb_device_id *id) | |
809 | { | |
810 | struct usb_device *udev = interface_to_usbdev(intf); | |
811 | struct usb_interface_descriptor *interface; | |
812 | struct camera_data *cam; | |
813 | int ret; | |
814 | ||
815 | /* A multi-config CPiA2 camera? */ | |
816 | if (udev->descriptor.bNumConfigurations != 1) | |
817 | return -ENODEV; | |
818 | interface = &intf->cur_altsetting->desc; | |
819 | ||
820 | /* If we get to this point, we found a CPiA2 camera */ | |
821 | LOG("CPiA2 USB camera found\n"); | |
822 | ||
6c493f8b HV |
823 | cam = cpia2_init_camera_struct(intf); |
824 | if (cam == NULL) | |
ab33d507 AC |
825 | return -ENOMEM; |
826 | ||
827 | cam->dev = udev; | |
828 | cam->iface = interface->bInterfaceNumber; | |
829 | ||
830 | ret = set_alternate(cam, USBIF_CMDONLY); | |
831 | if (ret < 0) { | |
832 | ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret); | |
833 | kfree(cam); | |
834 | return ret; | |
835 | } | |
836 | ||
ab33d507 AC |
837 | |
838 | if((ret = cpia2_init_camera(cam)) < 0) { | |
839 | ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret); | |
ab33d507 AC |
840 | kfree(cam); |
841 | return ret; | |
842 | } | |
843 | LOG(" CPiA Version: %d.%02d (%d.%d)\n", | |
844 | cam->params.version.firmware_revision_hi, | |
845 | cam->params.version.firmware_revision_lo, | |
846 | cam->params.version.asic_id, | |
847 | cam->params.version.asic_rev); | |
848 | LOG(" CPiA PnP-ID: %04x:%04x:%04x\n", | |
849 | cam->params.pnp_id.vendor, | |
850 | cam->params.pnp_id.product, | |
851 | cam->params.pnp_id.device_revision); | |
852 | LOG(" SensorID: %d.(version %d)\n", | |
853 | cam->params.version.sensor_flags, | |
854 | cam->params.version.sensor_rev); | |
855 | ||
856 | usb_set_intfdata(intf, cam); | |
857 | ||
6c493f8b HV |
858 | ret = cpia2_register_camera(cam); |
859 | if (ret < 0) { | |
860 | ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret); | |
861 | kfree(cam); | |
862 | return ret; | |
863 | } | |
864 | ||
ab33d507 AC |
865 | return 0; |
866 | } | |
867 | ||
868 | /****************************************************************************** | |
869 | * | |
870 | * cpia2_disconnect | |
871 | * | |
872 | *****************************************************************************/ | |
873 | static void cpia2_usb_disconnect(struct usb_interface *intf) | |
874 | { | |
875 | struct camera_data *cam = usb_get_intfdata(intf); | |
876 | usb_set_intfdata(intf, NULL); | |
ab33d507 AC |
877 | |
878 | DBG("Stopping stream\n"); | |
879 | cpia2_usb_stream_stop(cam); | |
880 | ||
6c493f8b | 881 | mutex_lock(&cam->v4l2_lock); |
ab33d507 AC |
882 | DBG("Unregistering camera\n"); |
883 | cpia2_unregister_camera(cam); | |
6c493f8b HV |
884 | v4l2_device_disconnect(&cam->v4l2_dev); |
885 | mutex_unlock(&cam->v4l2_lock); | |
886 | v4l2_device_put(&cam->v4l2_dev); | |
ab33d507 AC |
887 | |
888 | if(cam->buffers) { | |
889 | DBG("Wakeup waiting processes\n"); | |
890 | cam->curbuff->status = FRAME_READY; | |
891 | cam->curbuff->length = 0; | |
5063452e | 892 | wake_up_interruptible(&cam->wq_stream); |
ab33d507 AC |
893 | } |
894 | ||
895 | DBG("Releasing interface\n"); | |
896 | usb_driver_release_interface(&cpia2_driver, intf); | |
897 | ||
6c493f8b HV |
898 | LOG("CPiA2 camera disconnected.\n"); |
899 | } | |
900 | ||
901 | static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message) | |
902 | { | |
903 | struct camera_data *cam = usb_get_intfdata(intf); | |
904 | ||
905 | mutex_lock(&cam->v4l2_lock); | |
906 | if (cam->streaming) { | |
907 | cpia2_usb_stream_stop(cam); | |
908 | cam->streaming = 1; | |
ab33d507 | 909 | } |
6c493f8b | 910 | mutex_unlock(&cam->v4l2_lock); |
ab33d507 | 911 | |
6c493f8b HV |
912 | dev_info(&intf->dev, "going into suspend..\n"); |
913 | return 0; | |
ab33d507 AC |
914 | } |
915 | ||
6c493f8b HV |
916 | /* Resume device - start device. */ |
917 | static int cpia2_usb_resume(struct usb_interface *intf) | |
918 | { | |
919 | struct camera_data *cam = usb_get_intfdata(intf); | |
920 | ||
921 | mutex_lock(&cam->v4l2_lock); | |
922 | v4l2_ctrl_handler_setup(&cam->hdl); | |
923 | if (cam->streaming) { | |
924 | cam->streaming = 0; | |
925 | cpia2_usb_stream_start(cam, | |
926 | cam->params.camera_state.stream_mode); | |
927 | } | |
928 | mutex_unlock(&cam->v4l2_lock); | |
929 | ||
930 | dev_info(&intf->dev, "coming out of suspend..\n"); | |
931 | return 0; | |
932 | } | |
ab33d507 AC |
933 | |
934 | /****************************************************************************** | |
935 | * | |
936 | * usb_cpia2_init | |
937 | * | |
938 | *****************************************************************************/ | |
939 | int cpia2_usb_init(void) | |
940 | { | |
941 | return usb_register(&cpia2_driver); | |
942 | } | |
943 | ||
944 | /****************************************************************************** | |
945 | * | |
946 | * usb_cpia_cleanup | |
947 | * | |
948 | *****************************************************************************/ | |
949 | void cpia2_usb_cleanup(void) | |
950 | { | |
951 | schedule_timeout(2 * HZ); | |
952 | usb_deregister(&cpia2_driver); | |
953 | } |