1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Main USB camera driver |
4 | * |
5 | * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr> |
6 | * |
7 | * Camera button input handling by Márton Németh |
8 | * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> |
9 | */ |
10 | |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | |
13 | #define GSPCA_VERSION "2.14.0" |
14 | |
15 | #include <linux/init.h> |
16 | #include <linux/fs.h> |
17 | #include <linux/vmalloc.h> |
18 | #include <linux/sched.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/mm.h> |
21 | #include <linux/string.h> |
22 | #include <linux/pagemap.h> |
23 | #include <linux/io.h> |
24 | #include <asm/page.h> |
25 | #include <linux/uaccess.h> |
26 | #include <linux/ktime.h> |
27 | #include <media/v4l2-ioctl.h> |
28 | #include <media/v4l2-ctrls.h> |
29 | #include <media/v4l2-fh.h> |
30 | #include <media/v4l2-event.h> |
31 | |
32 | #include "gspca.h" |
33 | |
34 | #if IS_ENABLED(CONFIG_INPUT) |
35 | #include <linux/input.h> |
36 | #include <linux/usb/input.h> |
37 | #endif |
38 | |
39 | /* global values */ |
40 | #define DEF_NURBS 3 /* default number of URBs */ |
41 | #if DEF_NURBS > MAX_NURBS |
42 | #error "DEF_NURBS too big" |
43 | #endif |
44 | |
45 | MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>" ); |
46 | MODULE_DESCRIPTION("GSPCA USB Camera Driver" ); |
47 | MODULE_LICENSE("GPL" ); |
48 | MODULE_VERSION(GSPCA_VERSION); |
49 | |
50 | int gspca_debug; |
51 | EXPORT_SYMBOL(gspca_debug); |
52 | |
53 | static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, |
54 | __u32 pixfmt, int w, int h) |
55 | { |
56 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { |
57 | gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n" , |
58 | txt, |
59 | pixfmt & 0xff, |
60 | (pixfmt >> 8) & 0xff, |
61 | (pixfmt >> 16) & 0xff, |
62 | pixfmt >> 24, |
63 | w, h); |
64 | } else { |
65 | gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n" , |
66 | txt, |
67 | pixfmt, |
68 | w, h); |
69 | } |
70 | } |
71 | |
72 | /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
73 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ |
74 | #define GSPCA_MEMORY_READ 7 |
75 | |
76 | /* |
77 | * Input and interrupt endpoint handling functions |
78 | */ |
79 | #if IS_ENABLED(CONFIG_INPUT) |
80 | static void int_irq(struct urb *urb) |
81 | { |
82 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; |
83 | int ret; |
84 | |
85 | ret = urb->status; |
86 | switch (ret) { |
87 | case 0: |
88 | if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, |
89 | urb->transfer_buffer, urb->actual_length) < 0) { |
90 | gspca_err(gspca_dev, "Unknown packet received\n" ); |
91 | } |
92 | break; |
93 | |
94 | case -ENOENT: |
95 | case -ECONNRESET: |
96 | case -ENODEV: |
97 | case -ESHUTDOWN: |
98 | /* Stop is requested either by software or hardware is gone, |
99 | * keep the ret value non-zero and don't resubmit later. |
100 | */ |
101 | break; |
102 | |
103 | default: |
104 | gspca_err(gspca_dev, "URB error %i, resubmitting\n" , |
105 | urb->status); |
106 | urb->status = 0; |
107 | ret = 0; |
108 | } |
109 | |
110 | if (ret == 0) { |
111 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
112 | if (ret < 0) |
113 | pr_err("Resubmit URB failed with error %i\n" , ret); |
114 | } |
115 | } |
116 | |
117 | static int gspca_input_connect(struct gspca_dev *dev) |
118 | { |
119 | struct input_dev *input_dev; |
120 | int err = 0; |
121 | |
122 | dev->input_dev = NULL; |
123 | if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { |
124 | input_dev = input_allocate_device(); |
125 | if (!input_dev) |
126 | return -ENOMEM; |
127 | |
128 | usb_make_path(dev: dev->dev, buf: dev->phys, size: sizeof(dev->phys)); |
129 | strlcat(p: dev->phys, q: "/input0" , avail: sizeof(dev->phys)); |
130 | |
131 | input_dev->name = dev->sd_desc->name; |
132 | input_dev->phys = dev->phys; |
133 | |
134 | usb_to_input_id(dev: dev->dev, id: &input_dev->id); |
135 | |
136 | input_dev->evbit[0] = BIT_MASK(EV_KEY); |
137 | input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); |
138 | input_dev->dev.parent = &dev->dev->dev; |
139 | |
140 | err = input_register_device(input_dev); |
141 | if (err) { |
142 | pr_err("Input device registration failed with error %i\n" , |
143 | err); |
144 | input_dev->dev.parent = NULL; |
145 | input_free_device(dev: input_dev); |
146 | } else { |
147 | dev->input_dev = input_dev; |
148 | } |
149 | } |
150 | |
151 | return err; |
152 | } |
153 | |
154 | static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, |
155 | struct usb_endpoint_descriptor *ep) |
156 | { |
157 | unsigned int buffer_len; |
158 | int interval; |
159 | struct urb *urb; |
160 | struct usb_device *dev; |
161 | void *buffer = NULL; |
162 | int ret = -EINVAL; |
163 | |
164 | buffer_len = le16_to_cpu(ep->wMaxPacketSize); |
165 | interval = ep->bInterval; |
166 | gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n" , |
167 | ep->bEndpointAddress, buffer_len, interval); |
168 | |
169 | dev = gspca_dev->dev; |
170 | |
171 | urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
172 | if (!urb) { |
173 | ret = -ENOMEM; |
174 | goto error; |
175 | } |
176 | |
177 | buffer = usb_alloc_coherent(dev, size: buffer_len, |
178 | GFP_KERNEL, dma: &urb->transfer_dma); |
179 | if (!buffer) { |
180 | ret = -ENOMEM; |
181 | goto error_buffer; |
182 | } |
183 | usb_fill_int_urb(urb, dev, |
184 | usb_rcvintpipe(dev, ep->bEndpointAddress), |
185 | transfer_buffer: buffer, buffer_length: buffer_len, |
186 | complete_fn: int_irq, context: (void *)gspca_dev, interval); |
187 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
188 | ret = usb_submit_urb(urb, GFP_KERNEL); |
189 | if (ret < 0) { |
190 | gspca_err(gspca_dev, "submit int URB failed with error %i\n" , |
191 | ret); |
192 | goto error_submit; |
193 | } |
194 | gspca_dev->int_urb = urb; |
195 | return ret; |
196 | |
197 | error_submit: |
198 | usb_free_coherent(dev, |
199 | size: urb->transfer_buffer_length, |
200 | addr: urb->transfer_buffer, |
201 | dma: urb->transfer_dma); |
202 | error_buffer: |
203 | usb_free_urb(urb); |
204 | error: |
205 | return ret; |
206 | } |
207 | |
208 | static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
209 | { |
210 | struct usb_interface *intf; |
211 | struct usb_host_interface *intf_desc; |
212 | struct usb_endpoint_descriptor *ep; |
213 | int i; |
214 | |
215 | if (gspca_dev->sd_desc->int_pkt_scan) { |
216 | intf = usb_ifnum_to_if(dev: gspca_dev->dev, ifnum: gspca_dev->iface); |
217 | intf_desc = intf->cur_altsetting; |
218 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { |
219 | ep = &intf_desc->endpoint[i].desc; |
220 | if (usb_endpoint_dir_in(epd: ep) && |
221 | usb_endpoint_xfer_int(epd: ep)) { |
222 | |
223 | alloc_and_submit_int_urb(gspca_dev, ep); |
224 | break; |
225 | } |
226 | } |
227 | } |
228 | } |
229 | |
230 | static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) |
231 | { |
232 | struct urb *urb; |
233 | |
234 | urb = gspca_dev->int_urb; |
235 | if (urb) { |
236 | gspca_dev->int_urb = NULL; |
237 | usb_kill_urb(urb); |
238 | usb_free_coherent(dev: gspca_dev->dev, |
239 | size: urb->transfer_buffer_length, |
240 | addr: urb->transfer_buffer, |
241 | dma: urb->transfer_dma); |
242 | usb_free_urb(urb); |
243 | } |
244 | } |
245 | #else |
246 | static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) |
247 | { |
248 | } |
249 | |
250 | static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
251 | { |
252 | } |
253 | |
254 | static inline int gspca_input_connect(struct gspca_dev *dev) |
255 | { |
256 | return 0; |
257 | } |
258 | #endif |
259 | |
260 | /* |
261 | * fill a video frame from an URB and resubmit |
262 | */ |
263 | static void fill_frame(struct gspca_dev *gspca_dev, |
264 | struct urb *urb) |
265 | { |
266 | u8 *data; /* address of data in the iso message */ |
267 | int i, len, st; |
268 | cam_pkt_op pkt_scan; |
269 | |
270 | if (urb->status != 0) { |
271 | if (urb->status == -ESHUTDOWN) |
272 | return; /* disconnection */ |
273 | #ifdef CONFIG_PM |
274 | if (gspca_dev->frozen) |
275 | return; |
276 | #endif |
277 | gspca_err(gspca_dev, "urb status: %d\n" , urb->status); |
278 | urb->status = 0; |
279 | goto resubmit; |
280 | } |
281 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
282 | for (i = 0; i < urb->number_of_packets; i++) { |
283 | len = urb->iso_frame_desc[i].actual_length; |
284 | |
285 | /* check the packet status and length */ |
286 | st = urb->iso_frame_desc[i].status; |
287 | if (st) { |
288 | gspca_dbg(gspca_dev, D_PACK, "ISOC data error: [%d] len=%d, status=%d\n" , |
289 | i, len, st); |
290 | gspca_dev->last_packet_type = DISCARD_PACKET; |
291 | continue; |
292 | } |
293 | if (len == 0) { |
294 | if (gspca_dev->empty_packet == 0) |
295 | gspca_dev->empty_packet = 1; |
296 | continue; |
297 | } |
298 | |
299 | /* let the packet be analyzed by the subdriver */ |
300 | gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n" , |
301 | i, urb->iso_frame_desc[i].offset, len); |
302 | data = (u8 *) urb->transfer_buffer |
303 | + urb->iso_frame_desc[i].offset; |
304 | pkt_scan(gspca_dev, data, len); |
305 | } |
306 | |
307 | resubmit: |
308 | if (!gspca_dev->streaming) |
309 | return; |
310 | /* resubmit the URB */ |
311 | st = usb_submit_urb(urb, GFP_ATOMIC); |
312 | if (st < 0) |
313 | pr_err("usb_submit_urb() ret %d\n" , st); |
314 | } |
315 | |
316 | /* |
317 | * ISOC message interrupt from the USB device |
318 | * |
319 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
320 | */ |
321 | static void isoc_irq(struct urb *urb) |
322 | { |
323 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; |
324 | |
325 | gspca_dbg(gspca_dev, D_PACK, "isoc irq\n" ); |
326 | if (!gspca_dev->streaming) |
327 | return; |
328 | fill_frame(gspca_dev, urb); |
329 | } |
330 | |
331 | /* |
332 | * bulk message interrupt from the USB device |
333 | */ |
334 | static void bulk_irq(struct urb *urb) |
335 | { |
336 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; |
337 | int st; |
338 | |
339 | gspca_dbg(gspca_dev, D_PACK, "bulk irq\n" ); |
340 | if (!gspca_dev->streaming) |
341 | return; |
342 | switch (urb->status) { |
343 | case 0: |
344 | break; |
345 | case -ESHUTDOWN: |
346 | return; /* disconnection */ |
347 | default: |
348 | #ifdef CONFIG_PM |
349 | if (gspca_dev->frozen) |
350 | return; |
351 | #endif |
352 | gspca_err(gspca_dev, "urb status: %d\n" , urb->status); |
353 | urb->status = 0; |
354 | goto resubmit; |
355 | } |
356 | |
357 | gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n" , urb->actual_length); |
358 | gspca_dev->sd_desc->pkt_scan(gspca_dev, |
359 | urb->transfer_buffer, |
360 | urb->actual_length); |
361 | |
362 | resubmit: |
363 | if (!gspca_dev->streaming) |
364 | return; |
365 | /* resubmit the URB */ |
366 | if (gspca_dev->cam.bulk_nurbs != 0) { |
367 | st = usb_submit_urb(urb, GFP_ATOMIC); |
368 | if (st < 0) |
369 | pr_err("usb_submit_urb() ret %d\n" , st); |
370 | } |
371 | } |
372 | |
373 | /* |
374 | * add data to the current frame |
375 | * |
376 | * This function is called by the subdrivers at interrupt level. |
377 | * |
378 | * To build a frame, these ones must add |
379 | * - one FIRST_PACKET |
380 | * - 0 or many INTER_PACKETs |
381 | * - one LAST_PACKET |
382 | * DISCARD_PACKET invalidates the whole frame. |
383 | */ |
384 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
385 | enum gspca_packet_type packet_type, |
386 | const u8 *data, |
387 | int len) |
388 | { |
389 | struct gspca_buffer *buf; |
390 | unsigned long flags; |
391 | |
392 | gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n" , packet_type, len); |
393 | |
394 | spin_lock_irqsave(&gspca_dev->qlock, flags); |
395 | buf = list_first_entry_or_null(&gspca_dev->buf_list, |
396 | typeof(*buf), list); |
397 | spin_unlock_irqrestore(lock: &gspca_dev->qlock, flags); |
398 | |
399 | if (packet_type == FIRST_PACKET) { |
400 | /* if there is no queued buffer, discard the whole frame */ |
401 | if (!buf) { |
402 | gspca_dev->last_packet_type = DISCARD_PACKET; |
403 | gspca_dev->sequence++; |
404 | return; |
405 | } |
406 | gspca_dev->image = vb2_plane_vaddr(vb: &buf->vb.vb2_buf, plane_no: 0); |
407 | gspca_dev->image_len = 0; |
408 | } else { |
409 | switch (gspca_dev->last_packet_type) { |
410 | case DISCARD_PACKET: |
411 | if (packet_type == LAST_PACKET) { |
412 | gspca_dev->last_packet_type = packet_type; |
413 | gspca_dev->image = NULL; |
414 | gspca_dev->image_len = 0; |
415 | } |
416 | return; |
417 | case LAST_PACKET: |
418 | return; |
419 | } |
420 | } |
421 | |
422 | /* append the packet to the frame buffer */ |
423 | if (len > 0) { |
424 | if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) { |
425 | gspca_err(gspca_dev, "frame overflow %d > %d\n" , |
426 | gspca_dev->image_len + len, |
427 | PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)); |
428 | packet_type = DISCARD_PACKET; |
429 | } else { |
430 | /* !! image is NULL only when last pkt is LAST or DISCARD |
431 | if (gspca_dev->image == NULL) { |
432 | pr_err("gspca_frame_add() image == NULL\n"); |
433 | return; |
434 | } |
435 | */ |
436 | memcpy(gspca_dev->image + gspca_dev->image_len, |
437 | data, len); |
438 | gspca_dev->image_len += len; |
439 | } |
440 | } |
441 | gspca_dev->last_packet_type = packet_type; |
442 | |
443 | /* if last packet, invalidate packet concatenation until |
444 | * next first packet, wake up the application and advance |
445 | * in the queue */ |
446 | if (packet_type == LAST_PACKET) { |
447 | if (gspca_dev->image_len > gspca_dev->pixfmt.sizeimage) |
448 | gspca_dev->image_len = gspca_dev->pixfmt.sizeimage; |
449 | spin_lock_irqsave(&gspca_dev->qlock, flags); |
450 | list_del(entry: &buf->list); |
451 | spin_unlock_irqrestore(lock: &gspca_dev->qlock, flags); |
452 | buf->vb.vb2_buf.timestamp = ktime_get_ns(); |
453 | vb2_set_plane_payload(vb: &buf->vb.vb2_buf, plane_no: 0, |
454 | size: gspca_dev->image_len); |
455 | buf->vb.sequence = gspca_dev->sequence++; |
456 | buf->vb.field = V4L2_FIELD_NONE; |
457 | gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n" , |
458 | gspca_dev->image_len); |
459 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_DONE); |
460 | gspca_dev->image = NULL; |
461 | gspca_dev->image_len = 0; |
462 | } |
463 | } |
464 | EXPORT_SYMBOL(gspca_frame_add); |
465 | |
466 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
467 | { |
468 | struct urb *urb; |
469 | unsigned int i; |
470 | |
471 | gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n" ); |
472 | |
473 | /* Killing all URBs guarantee that no URB completion |
474 | * handler is running. Therefore, there shouldn't |
475 | * be anyone trying to access gspca_dev->urb[i] |
476 | */ |
477 | for (i = 0; i < MAX_NURBS; i++) |
478 | usb_kill_urb(urb: gspca_dev->urb[i]); |
479 | |
480 | gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n" ); |
481 | for (i = 0; i < MAX_NURBS; i++) { |
482 | urb = gspca_dev->urb[i]; |
483 | if (!urb) |
484 | continue; |
485 | gspca_dev->urb[i] = NULL; |
486 | usb_free_coherent(dev: gspca_dev->dev, |
487 | size: urb->transfer_buffer_length, |
488 | addr: urb->transfer_buffer, |
489 | dma: urb->transfer_dma); |
490 | usb_free_urb(urb); |
491 | } |
492 | } |
493 | |
494 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
495 | { |
496 | int ret; |
497 | |
498 | if (gspca_dev->alt == 0) |
499 | return 0; |
500 | ret = usb_set_interface(dev: gspca_dev->dev, ifnum: gspca_dev->iface, alternate: 0); |
501 | if (ret < 0) |
502 | pr_err("set alt 0 err %d\n" , ret); |
503 | return ret; |
504 | } |
505 | |
506 | /* |
507 | * look for an input transfer endpoint in an alternate setting. |
508 | * |
509 | * If xfer_ep is invalid, return the first valid ep found, otherwise |
510 | * look for exactly the ep with address equal to xfer_ep. |
511 | */ |
512 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
513 | int xfer, int xfer_ep) |
514 | { |
515 | struct usb_host_endpoint *ep; |
516 | int i, attr; |
517 | |
518 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
519 | ep = &alt->endpoint[i]; |
520 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
521 | if (attr == xfer |
522 | && ep->desc.wMaxPacketSize != 0 |
523 | && usb_endpoint_dir_in(epd: &ep->desc) |
524 | && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) |
525 | return ep; |
526 | } |
527 | return NULL; |
528 | } |
529 | |
530 | /* compute the minimum bandwidth for the current transfer */ |
531 | static u32 which_bandwidth(struct gspca_dev *gspca_dev) |
532 | { |
533 | u32 bandwidth; |
534 | |
535 | /* get the (max) image size */ |
536 | bandwidth = gspca_dev->pixfmt.sizeimage; |
537 | |
538 | /* if the image is compressed, estimate its mean size */ |
539 | if (!gspca_dev->cam.needs_full_bandwidth && |
540 | bandwidth < gspca_dev->pixfmt.width * |
541 | gspca_dev->pixfmt.height) |
542 | bandwidth = bandwidth * 3 / 8; /* 0.375 */ |
543 | |
544 | /* estimate the frame rate */ |
545 | if (gspca_dev->sd_desc->get_streamparm) { |
546 | struct v4l2_streamparm parm; |
547 | |
548 | gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm); |
549 | bandwidth *= parm.parm.capture.timeperframe.denominator; |
550 | bandwidth /= parm.parm.capture.timeperframe.numerator; |
551 | } else { |
552 | |
553 | /* don't hope more than 15 fps with USB 1.1 and |
554 | * image resolution >= 640x480 */ |
555 | if (gspca_dev->pixfmt.width >= 640 |
556 | && gspca_dev->dev->speed == USB_SPEED_FULL) |
557 | bandwidth *= 15; /* 15 fps */ |
558 | else |
559 | bandwidth *= 30; /* 30 fps */ |
560 | } |
561 | |
562 | gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n" , bandwidth); |
563 | return bandwidth; |
564 | } |
565 | |
566 | /* endpoint table */ |
567 | #define MAX_ALT 16 |
568 | struct ep_tb_s { |
569 | u32 alt; |
570 | u32 bandwidth; |
571 | }; |
572 | |
573 | /* |
574 | * build the table of the endpoints |
575 | * and compute the minimum bandwidth for the image transfer |
576 | */ |
577 | static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, |
578 | struct usb_interface *intf, |
579 | struct ep_tb_s *ep_tb) |
580 | { |
581 | struct usb_host_endpoint *ep; |
582 | int i, j, nbalt, psize, found; |
583 | u32 bandwidth, last_bw; |
584 | |
585 | nbalt = intf->num_altsetting; |
586 | if (nbalt > MAX_ALT) |
587 | nbalt = MAX_ALT; /* fixme: should warn */ |
588 | |
589 | /* build the endpoint table */ |
590 | i = 0; |
591 | last_bw = 0; |
592 | for (;;) { |
593 | ep_tb->bandwidth = 2000 * 2000 * 120; |
594 | found = 0; |
595 | for (j = 0; j < nbalt; j++) { |
596 | ep = alt_xfer(alt: &intf->altsetting[j], |
597 | USB_ENDPOINT_XFER_ISOC, |
598 | xfer_ep: gspca_dev->xfer_ep); |
599 | if (ep == NULL) |
600 | continue; |
601 | if (ep->desc.bInterval == 0) { |
602 | pr_err("alt %d iso endp with 0 interval\n" , j); |
603 | continue; |
604 | } |
605 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
606 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); |
607 | bandwidth = psize * 1000; |
608 | if (gspca_dev->dev->speed == USB_SPEED_HIGH |
609 | || gspca_dev->dev->speed >= USB_SPEED_SUPER) |
610 | bandwidth *= 8; |
611 | bandwidth /= 1 << (ep->desc.bInterval - 1); |
612 | if (bandwidth <= last_bw) |
613 | continue; |
614 | if (bandwidth < ep_tb->bandwidth) { |
615 | ep_tb->bandwidth = bandwidth; |
616 | ep_tb->alt = j; |
617 | found = 1; |
618 | } |
619 | } |
620 | if (!found) |
621 | break; |
622 | gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n" , |
623 | ep_tb->alt, ep_tb->bandwidth); |
624 | last_bw = ep_tb->bandwidth; |
625 | i++; |
626 | ep_tb++; |
627 | } |
628 | |
629 | /* |
630 | * If the camera: |
631 | * has a usb audio class interface (a built in usb mic); and |
632 | * is a usb 1 full speed device; and |
633 | * uses the max full speed iso bandwidth; and |
634 | * and has more than 1 alt setting |
635 | * then skip the highest alt setting to spare bandwidth for the mic |
636 | */ |
637 | if (gspca_dev->audio && |
638 | gspca_dev->dev->speed == USB_SPEED_FULL && |
639 | last_bw >= 1000000 && |
640 | i > 1) { |
641 | gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n" ); |
642 | i--; |
643 | ep_tb--; |
644 | } |
645 | |
646 | /* get the requested bandwidth and start at the highest atlsetting */ |
647 | bandwidth = which_bandwidth(gspca_dev); |
648 | ep_tb--; |
649 | while (i > 1) { |
650 | ep_tb--; |
651 | if (ep_tb->bandwidth < bandwidth) |
652 | break; |
653 | i--; |
654 | } |
655 | return i; |
656 | } |
657 | |
658 | /* |
659 | * create the URBs for image transfer |
660 | */ |
661 | static int create_urbs(struct gspca_dev *gspca_dev, |
662 | struct usb_host_endpoint *ep) |
663 | { |
664 | struct urb *urb; |
665 | int n, nurbs, i, psize, npkt, bsize; |
666 | |
667 | /* calculate the packet size and the number of packets */ |
668 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
669 | |
670 | if (!gspca_dev->cam.bulk) { /* isoc */ |
671 | |
672 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
673 | if (gspca_dev->pkt_size == 0) |
674 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); |
675 | else |
676 | psize = gspca_dev->pkt_size; |
677 | npkt = gspca_dev->cam.npkt; |
678 | if (npkt == 0) |
679 | npkt = 32; /* default value */ |
680 | bsize = psize * npkt; |
681 | gspca_dbg(gspca_dev, D_STREAM, |
682 | "isoc %d pkts size %d = bsize:%d\n" , |
683 | npkt, psize, bsize); |
684 | nurbs = DEF_NURBS; |
685 | } else { /* bulk */ |
686 | npkt = 0; |
687 | bsize = gspca_dev->cam.bulk_size; |
688 | if (bsize == 0) |
689 | bsize = psize; |
690 | gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n" , bsize); |
691 | if (gspca_dev->cam.bulk_nurbs != 0) |
692 | nurbs = gspca_dev->cam.bulk_nurbs; |
693 | else |
694 | nurbs = 1; |
695 | } |
696 | |
697 | for (n = 0; n < nurbs; n++) { |
698 | urb = usb_alloc_urb(iso_packets: npkt, GFP_KERNEL); |
699 | if (!urb) |
700 | return -ENOMEM; |
701 | gspca_dev->urb[n] = urb; |
702 | urb->transfer_buffer = usb_alloc_coherent(dev: gspca_dev->dev, |
703 | size: bsize, |
704 | GFP_KERNEL, |
705 | dma: &urb->transfer_dma); |
706 | |
707 | if (urb->transfer_buffer == NULL) { |
708 | pr_err("usb_alloc_coherent failed\n" ); |
709 | return -ENOMEM; |
710 | } |
711 | urb->dev = gspca_dev->dev; |
712 | urb->context = gspca_dev; |
713 | urb->transfer_buffer_length = bsize; |
714 | if (npkt != 0) { /* ISOC */ |
715 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, |
716 | ep->desc.bEndpointAddress); |
717 | urb->transfer_flags = URB_ISO_ASAP |
718 | | URB_NO_TRANSFER_DMA_MAP; |
719 | urb->interval = 1 << (ep->desc.bInterval - 1); |
720 | urb->complete = isoc_irq; |
721 | urb->number_of_packets = npkt; |
722 | for (i = 0; i < npkt; i++) { |
723 | urb->iso_frame_desc[i].length = psize; |
724 | urb->iso_frame_desc[i].offset = psize * i; |
725 | } |
726 | } else { /* bulk */ |
727 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, |
728 | ep->desc.bEndpointAddress); |
729 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
730 | urb->complete = bulk_irq; |
731 | } |
732 | } |
733 | return 0; |
734 | } |
735 | |
736 | /* Note: both the queue and the usb locks should be held when calling this */ |
737 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
738 | { |
739 | gspca_dev->streaming = false; |
740 | gspca_dev->usb_err = 0; |
741 | if (gspca_dev->sd_desc->stopN) |
742 | gspca_dev->sd_desc->stopN(gspca_dev); |
743 | destroy_urbs(gspca_dev); |
744 | gspca_input_destroy_urb(gspca_dev); |
745 | gspca_set_alt0(gspca_dev); |
746 | if (gspca_dev->present) |
747 | gspca_input_create_urb(gspca_dev); |
748 | if (gspca_dev->sd_desc->stop0) |
749 | gspca_dev->sd_desc->stop0(gspca_dev); |
750 | gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n" ); |
751 | } |
752 | |
753 | /* |
754 | * start the USB transfer |
755 | */ |
756 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) |
757 | { |
758 | struct usb_interface *intf; |
759 | struct usb_host_endpoint *ep; |
760 | struct urb *urb; |
761 | struct ep_tb_s ep_tb[MAX_ALT]; |
762 | int n, ret, xfer, alt, alt_idx; |
763 | |
764 | /* reset the streaming variables */ |
765 | gspca_dev->image = NULL; |
766 | gspca_dev->image_len = 0; |
767 | gspca_dev->last_packet_type = DISCARD_PACKET; |
768 | |
769 | gspca_dev->usb_err = 0; |
770 | |
771 | /* do the specific subdriver stuff before endpoint selection */ |
772 | intf = usb_ifnum_to_if(dev: gspca_dev->dev, ifnum: gspca_dev->iface); |
773 | gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0; |
774 | if (gspca_dev->sd_desc->isoc_init) { |
775 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); |
776 | if (ret < 0) |
777 | return ret; |
778 | } |
779 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
780 | : USB_ENDPOINT_XFER_ISOC; |
781 | |
782 | /* if bulk or the subdriver forced an altsetting, get the endpoint */ |
783 | if (gspca_dev->alt != 0) { |
784 | gspca_dev->alt--; /* (previous version compatibility) */ |
785 | ep = alt_xfer(alt: &intf->altsetting[gspca_dev->alt], xfer, |
786 | xfer_ep: gspca_dev->xfer_ep); |
787 | if (ep == NULL) { |
788 | pr_err("bad altsetting %d\n" , gspca_dev->alt); |
789 | return -EIO; |
790 | } |
791 | ep_tb[0].alt = gspca_dev->alt; |
792 | alt_idx = 1; |
793 | } else { |
794 | /* else, compute the minimum bandwidth |
795 | * and build the endpoint table */ |
796 | alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb); |
797 | if (alt_idx <= 0) { |
798 | pr_err("no transfer endpoint found\n" ); |
799 | return -EIO; |
800 | } |
801 | } |
802 | |
803 | /* set the highest alternate setting and |
804 | * loop until urb submit succeeds */ |
805 | gspca_input_destroy_urb(gspca_dev); |
806 | |
807 | gspca_dev->alt = ep_tb[--alt_idx].alt; |
808 | alt = -1; |
809 | for (;;) { |
810 | if (alt != gspca_dev->alt) { |
811 | alt = gspca_dev->alt; |
812 | if (intf->num_altsetting > 1) { |
813 | ret = usb_set_interface(dev: gspca_dev->dev, |
814 | ifnum: gspca_dev->iface, |
815 | alternate: alt); |
816 | if (ret < 0) { |
817 | if (ret == -ENOSPC) |
818 | goto retry; /*fixme: ugly*/ |
819 | pr_err("set alt %d err %d\n" , alt, ret); |
820 | goto out; |
821 | } |
822 | } |
823 | } |
824 | if (!gspca_dev->cam.no_urb_create) { |
825 | gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n" , |
826 | alt); |
827 | ret = create_urbs(gspca_dev, |
828 | ep: alt_xfer(alt: &intf->altsetting[alt], xfer, |
829 | xfer_ep: gspca_dev->xfer_ep)); |
830 | if (ret < 0) { |
831 | destroy_urbs(gspca_dev); |
832 | goto out; |
833 | } |
834 | } |
835 | |
836 | /* clear the bulk endpoint */ |
837 | if (gspca_dev->cam.bulk) |
838 | usb_clear_halt(dev: gspca_dev->dev, |
839 | pipe: gspca_dev->urb[0]->pipe); |
840 | |
841 | /* start the cam */ |
842 | ret = gspca_dev->sd_desc->start(gspca_dev); |
843 | if (ret < 0) { |
844 | destroy_urbs(gspca_dev); |
845 | goto out; |
846 | } |
847 | v4l2_ctrl_handler_setup(hdl: gspca_dev->vdev.ctrl_handler); |
848 | gspca_dev->streaming = true; |
849 | |
850 | /* some bulk transfers are started by the subdriver */ |
851 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
852 | break; |
853 | |
854 | /* submit the URBs */ |
855 | for (n = 0; n < MAX_NURBS; n++) { |
856 | urb = gspca_dev->urb[n]; |
857 | if (urb == NULL) |
858 | break; |
859 | ret = usb_submit_urb(urb, GFP_KERNEL); |
860 | if (ret < 0) |
861 | break; |
862 | } |
863 | if (ret >= 0) |
864 | break; /* transfer is started */ |
865 | |
866 | /* something when wrong |
867 | * stop the webcam and free the transfer resources */ |
868 | gspca_stream_off(gspca_dev); |
869 | if (ret != -ENOSPC) { |
870 | pr_err("usb_submit_urb alt %d err %d\n" , |
871 | gspca_dev->alt, ret); |
872 | goto out; |
873 | } |
874 | |
875 | /* the bandwidth is not wide enough |
876 | * negotiate or try a lower alternate setting */ |
877 | retry: |
878 | gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n" , |
879 | alt); |
880 | msleep(msecs: 20); /* wait for kill complete */ |
881 | if (gspca_dev->sd_desc->isoc_nego) { |
882 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); |
883 | if (ret < 0) |
884 | goto out; |
885 | } else { |
886 | if (alt_idx <= 0) { |
887 | pr_err("no transfer endpoint found\n" ); |
888 | ret = -EIO; |
889 | goto out; |
890 | } |
891 | gspca_dev->alt = ep_tb[--alt_idx].alt; |
892 | } |
893 | } |
894 | out: |
895 | gspca_input_create_urb(gspca_dev); |
896 | return ret; |
897 | } |
898 | |
899 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
900 | { |
901 | int i; |
902 | |
903 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ |
904 | gspca_dev->curr_mode = i; |
905 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i]; |
906 | |
907 | /* does nothing if ctrl_handler == NULL */ |
908 | v4l2_ctrl_handler_setup(hdl: gspca_dev->vdev.ctrl_handler); |
909 | } |
910 | |
911 | static int wxh_to_mode(struct gspca_dev *gspca_dev, |
912 | int width, int height, u32 pixelformat) |
913 | { |
914 | int i; |
915 | |
916 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { |
917 | if (width == gspca_dev->cam.cam_mode[i].width |
918 | && height == gspca_dev->cam.cam_mode[i].height |
919 | && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat) |
920 | return i; |
921 | } |
922 | return -EINVAL; |
923 | } |
924 | |
925 | static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, |
926 | int width, int height, u32 pixelformat) |
927 | { |
928 | int i; |
929 | |
930 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { |
931 | if (width >= gspca_dev->cam.cam_mode[i].width |
932 | && height >= gspca_dev->cam.cam_mode[i].height |
933 | && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat) |
934 | return i; |
935 | } |
936 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
937 | if (width >= gspca_dev->cam.cam_mode[i].width |
938 | && height >= gspca_dev->cam.cam_mode[i].height) |
939 | break; |
940 | } |
941 | return i; |
942 | } |
943 | |
944 | /* |
945 | * search a mode with the right pixel format |
946 | */ |
947 | static int gspca_get_mode(struct gspca_dev *gspca_dev, |
948 | int mode, |
949 | int pixfmt) |
950 | { |
951 | int modeU, modeD; |
952 | |
953 | modeU = modeD = mode; |
954 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { |
955 | if (--modeD >= 0) { |
956 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
957 | == pixfmt) |
958 | return modeD; |
959 | } |
960 | if (++modeU < gspca_dev->cam.nmodes) { |
961 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
962 | == pixfmt) |
963 | return modeU; |
964 | } |
965 | } |
966 | return -EINVAL; |
967 | } |
968 | |
969 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
970 | static int vidioc_g_chip_info(struct file *file, void *priv, |
971 | struct v4l2_dbg_chip_info *chip) |
972 | { |
973 | struct gspca_dev *gspca_dev = video_drvdata(file); |
974 | |
975 | gspca_dev->usb_err = 0; |
976 | if (gspca_dev->sd_desc->get_chip_info) |
977 | return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); |
978 | return chip->match.addr ? -EINVAL : 0; |
979 | } |
980 | |
981 | static int vidioc_g_register(struct file *file, void *priv, |
982 | struct v4l2_dbg_register *reg) |
983 | { |
984 | struct gspca_dev *gspca_dev = video_drvdata(file); |
985 | |
986 | gspca_dev->usb_err = 0; |
987 | return gspca_dev->sd_desc->get_register(gspca_dev, reg); |
988 | } |
989 | |
990 | static int vidioc_s_register(struct file *file, void *priv, |
991 | const struct v4l2_dbg_register *reg) |
992 | { |
993 | struct gspca_dev *gspca_dev = video_drvdata(file); |
994 | |
995 | gspca_dev->usb_err = 0; |
996 | return gspca_dev->sd_desc->set_register(gspca_dev, reg); |
997 | } |
998 | #endif |
999 | |
1000 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
1001 | struct v4l2_fmtdesc *fmtdesc) |
1002 | { |
1003 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1004 | int i, j, index; |
1005 | __u32 fmt_tb[8]; |
1006 | |
1007 | /* give an index to each format */ |
1008 | index = 0; |
1009 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { |
1010 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
1011 | j = 0; |
1012 | for (;;) { |
1013 | if (fmt_tb[j] == fmt_tb[index]) |
1014 | break; |
1015 | j++; |
1016 | } |
1017 | if (j == index) { |
1018 | if (fmtdesc->index == index) |
1019 | break; /* new format */ |
1020 | index++; |
1021 | if (index >= ARRAY_SIZE(fmt_tb)) |
1022 | return -EINVAL; |
1023 | } |
1024 | } |
1025 | if (i < 0) |
1026 | return -EINVAL; /* no more format */ |
1027 | |
1028 | fmtdesc->pixelformat = fmt_tb[index]; |
1029 | return 0; |
1030 | } |
1031 | |
1032 | static int vidioc_g_fmt_vid_cap(struct file *file, void *_priv, |
1033 | struct v4l2_format *fmt) |
1034 | { |
1035 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1036 | u32 priv = fmt->fmt.pix.priv; |
1037 | |
1038 | fmt->fmt.pix = gspca_dev->pixfmt; |
1039 | /* some drivers use priv internally, so keep the original value */ |
1040 | fmt->fmt.pix.priv = priv; |
1041 | return 0; |
1042 | } |
1043 | |
1044 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
1045 | struct v4l2_format *fmt) |
1046 | { |
1047 | int w, h, mode, mode2; |
1048 | |
1049 | w = fmt->fmt.pix.width; |
1050 | h = fmt->fmt.pix.height; |
1051 | |
1052 | PDEBUG_MODE(gspca_dev, D_CONF, txt: "try fmt cap" , |
1053 | pixfmt: fmt->fmt.pix.pixelformat, w, h); |
1054 | |
1055 | /* search the nearest mode for width and height */ |
1056 | mode = wxh_to_nearest_mode(gspca_dev, width: w, height: h, pixelformat: fmt->fmt.pix.pixelformat); |
1057 | |
1058 | /* OK if right palette */ |
1059 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1060 | != fmt->fmt.pix.pixelformat) { |
1061 | |
1062 | /* else, search the closest mode with the same pixel format */ |
1063 | mode2 = gspca_get_mode(gspca_dev, mode, |
1064 | pixfmt: fmt->fmt.pix.pixelformat); |
1065 | if (mode2 >= 0) |
1066 | mode = mode2; |
1067 | } |
1068 | fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; |
1069 | if (gspca_dev->sd_desc->try_fmt) { |
1070 | /* pass original resolution to subdriver try_fmt */ |
1071 | fmt->fmt.pix.width = w; |
1072 | fmt->fmt.pix.height = h; |
1073 | gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); |
1074 | } |
1075 | return mode; /* used when s_fmt */ |
1076 | } |
1077 | |
1078 | static int vidioc_try_fmt_vid_cap(struct file *file, void *_priv, |
1079 | struct v4l2_format *fmt) |
1080 | { |
1081 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1082 | u32 priv = fmt->fmt.pix.priv; |
1083 | |
1084 | if (try_fmt_vid_cap(gspca_dev, fmt) < 0) |
1085 | return -EINVAL; |
1086 | /* some drivers use priv internally, so keep the original value */ |
1087 | fmt->fmt.pix.priv = priv; |
1088 | return 0; |
1089 | } |
1090 | |
1091 | static int vidioc_s_fmt_vid_cap(struct file *file, void *_priv, |
1092 | struct v4l2_format *fmt) |
1093 | { |
1094 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1095 | u32 priv = fmt->fmt.pix.priv; |
1096 | int mode; |
1097 | |
1098 | if (vb2_is_busy(q: &gspca_dev->queue)) |
1099 | return -EBUSY; |
1100 | |
1101 | mode = try_fmt_vid_cap(gspca_dev, fmt); |
1102 | if (mode < 0) |
1103 | return -EINVAL; |
1104 | |
1105 | gspca_dev->curr_mode = mode; |
1106 | if (gspca_dev->sd_desc->try_fmt) |
1107 | /* subdriver try_fmt can modify format parameters */ |
1108 | gspca_dev->pixfmt = fmt->fmt.pix; |
1109 | else |
1110 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode]; |
1111 | /* some drivers use priv internally, so keep the original value */ |
1112 | fmt->fmt.pix.priv = priv; |
1113 | return 0; |
1114 | } |
1115 | |
1116 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1117 | struct v4l2_frmsizeenum *fsize) |
1118 | { |
1119 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1120 | int i; |
1121 | __u32 index = 0; |
1122 | |
1123 | if (gspca_dev->sd_desc->enum_framesizes) |
1124 | return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); |
1125 | |
1126 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { |
1127 | if (fsize->pixel_format != |
1128 | gspca_dev->cam.cam_mode[i].pixelformat) |
1129 | continue; |
1130 | |
1131 | if (fsize->index == index) { |
1132 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
1133 | fsize->discrete.width = |
1134 | gspca_dev->cam.cam_mode[i].width; |
1135 | fsize->discrete.height = |
1136 | gspca_dev->cam.cam_mode[i].height; |
1137 | return 0; |
1138 | } |
1139 | index++; |
1140 | } |
1141 | |
1142 | return -EINVAL; |
1143 | } |
1144 | |
1145 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1146 | struct v4l2_frmivalenum *fival) |
1147 | { |
1148 | struct gspca_dev *gspca_dev = video_drvdata(file: filp); |
1149 | int mode; |
1150 | __u32 i; |
1151 | |
1152 | mode = wxh_to_mode(gspca_dev, width: fival->width, height: fival->height, |
1153 | pixelformat: fival->pixel_format); |
1154 | if (mode < 0) |
1155 | return -EINVAL; |
1156 | |
1157 | if (gspca_dev->cam.mode_framerates == NULL || |
1158 | gspca_dev->cam.mode_framerates[mode].nrates == 0) |
1159 | return -EINVAL; |
1160 | |
1161 | if (fival->pixel_format != |
1162 | gspca_dev->cam.cam_mode[mode].pixelformat) |
1163 | return -EINVAL; |
1164 | |
1165 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { |
1166 | if (fival->index == i) { |
1167 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
1168 | fival->discrete.numerator = 1; |
1169 | fival->discrete.denominator = |
1170 | gspca_dev->cam.mode_framerates[mode].rates[i]; |
1171 | return 0; |
1172 | } |
1173 | } |
1174 | |
1175 | return -EINVAL; |
1176 | } |
1177 | |
1178 | static void gspca_release(struct v4l2_device *v4l2_device) |
1179 | { |
1180 | struct gspca_dev *gspca_dev = |
1181 | container_of(v4l2_device, struct gspca_dev, v4l2_dev); |
1182 | |
1183 | v4l2_ctrl_handler_free(hdl: gspca_dev->vdev.ctrl_handler); |
1184 | v4l2_device_unregister(v4l2_dev: &gspca_dev->v4l2_dev); |
1185 | kfree(objp: gspca_dev->usb_buf); |
1186 | kfree(objp: gspca_dev); |
1187 | } |
1188 | |
1189 | static int vidioc_querycap(struct file *file, void *priv, |
1190 | struct v4l2_capability *cap) |
1191 | { |
1192 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1193 | |
1194 | strscpy((char *)cap->driver, gspca_dev->sd_desc->name, |
1195 | sizeof(cap->driver)); |
1196 | if (gspca_dev->dev->product != NULL) { |
1197 | strscpy((char *)cap->card, gspca_dev->dev->product, |
1198 | sizeof(cap->card)); |
1199 | } else { |
1200 | snprintf(buf: (char *) cap->card, size: sizeof cap->card, |
1201 | fmt: "USB Camera (%04x:%04x)" , |
1202 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), |
1203 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); |
1204 | } |
1205 | usb_make_path(dev: gspca_dev->dev, buf: (char *) cap->bus_info, |
1206 | size: sizeof(cap->bus_info)); |
1207 | return 0; |
1208 | } |
1209 | |
1210 | static int vidioc_enum_input(struct file *file, void *priv, |
1211 | struct v4l2_input *input) |
1212 | { |
1213 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1214 | |
1215 | if (input->index != 0) |
1216 | return -EINVAL; |
1217 | input->type = V4L2_INPUT_TYPE_CAMERA; |
1218 | input->status = gspca_dev->cam.input_flags; |
1219 | strscpy(input->name, gspca_dev->sd_desc->name, |
1220 | sizeof input->name); |
1221 | return 0; |
1222 | } |
1223 | |
1224 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
1225 | { |
1226 | *i = 0; |
1227 | return 0; |
1228 | } |
1229 | |
1230 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
1231 | { |
1232 | if (i > 0) |
1233 | return -EINVAL; |
1234 | return 0; |
1235 | } |
1236 | |
1237 | static int vidioc_g_jpegcomp(struct file *file, void *priv, |
1238 | struct v4l2_jpegcompression *jpegcomp) |
1239 | { |
1240 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1241 | |
1242 | gspca_dev->usb_err = 0; |
1243 | return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1244 | } |
1245 | |
1246 | static int vidioc_s_jpegcomp(struct file *file, void *priv, |
1247 | const struct v4l2_jpegcompression *jpegcomp) |
1248 | { |
1249 | struct gspca_dev *gspca_dev = video_drvdata(file); |
1250 | |
1251 | gspca_dev->usb_err = 0; |
1252 | return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); |
1253 | } |
1254 | |
1255 | static int vidioc_g_parm(struct file *filp, void *priv, |
1256 | struct v4l2_streamparm *parm) |
1257 | { |
1258 | struct gspca_dev *gspca_dev = video_drvdata(file: filp); |
1259 | |
1260 | parm->parm.capture.readbuffers = gspca_dev->queue.min_queued_buffers; |
1261 | |
1262 | if (!gspca_dev->sd_desc->get_streamparm) |
1263 | return 0; |
1264 | |
1265 | parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
1266 | gspca_dev->usb_err = 0; |
1267 | gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); |
1268 | return gspca_dev->usb_err; |
1269 | } |
1270 | |
1271 | static int vidioc_s_parm(struct file *filp, void *priv, |
1272 | struct v4l2_streamparm *parm) |
1273 | { |
1274 | struct gspca_dev *gspca_dev = video_drvdata(file: filp); |
1275 | |
1276 | parm->parm.capture.readbuffers = gspca_dev->queue.min_queued_buffers; |
1277 | |
1278 | if (!gspca_dev->sd_desc->set_streamparm) { |
1279 | parm->parm.capture.capability = 0; |
1280 | return 0; |
1281 | } |
1282 | |
1283 | parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
1284 | gspca_dev->usb_err = 0; |
1285 | gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); |
1286 | return gspca_dev->usb_err; |
1287 | } |
1288 | |
1289 | static int gspca_queue_setup(struct vb2_queue *vq, |
1290 | unsigned int *nbuffers, unsigned int *nplanes, |
1291 | unsigned int sizes[], struct device *alloc_devs[]) |
1292 | { |
1293 | struct gspca_dev *gspca_dev = vb2_get_drv_priv(q: vq); |
1294 | unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); |
1295 | |
1296 | if (*nplanes) |
1297 | return sizes[0] < size ? -EINVAL : 0; |
1298 | *nplanes = 1; |
1299 | sizes[0] = size; |
1300 | return 0; |
1301 | } |
1302 | |
1303 | static int gspca_buffer_prepare(struct vb2_buffer *vb) |
1304 | { |
1305 | struct gspca_dev *gspca_dev = vb2_get_drv_priv(q: vb->vb2_queue); |
1306 | unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); |
1307 | |
1308 | if (vb2_plane_size(vb, plane_no: 0) < size) { |
1309 | gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n" , |
1310 | vb2_plane_size(vb, 0), size); |
1311 | return -EINVAL; |
1312 | } |
1313 | return 0; |
1314 | } |
1315 | |
1316 | static void gspca_buffer_finish(struct vb2_buffer *vb) |
1317 | { |
1318 | struct gspca_dev *gspca_dev = vb2_get_drv_priv(q: vb->vb2_queue); |
1319 | |
1320 | if (!gspca_dev->sd_desc->dq_callback) |
1321 | return; |
1322 | |
1323 | gspca_dev->usb_err = 0; |
1324 | if (gspca_dev->present) |
1325 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
1326 | } |
1327 | |
1328 | static void gspca_buffer_queue(struct vb2_buffer *vb) |
1329 | { |
1330 | struct gspca_dev *gspca_dev = vb2_get_drv_priv(q: vb->vb2_queue); |
1331 | struct gspca_buffer *buf = to_gspca_buffer(vb2: vb); |
1332 | unsigned long flags; |
1333 | |
1334 | spin_lock_irqsave(&gspca_dev->qlock, flags); |
1335 | list_add_tail(new: &buf->list, head: &gspca_dev->buf_list); |
1336 | spin_unlock_irqrestore(lock: &gspca_dev->qlock, flags); |
1337 | } |
1338 | |
1339 | static void gspca_return_all_buffers(struct gspca_dev *gspca_dev, |
1340 | enum vb2_buffer_state state) |
1341 | { |
1342 | struct gspca_buffer *buf, *node; |
1343 | unsigned long flags; |
1344 | |
1345 | spin_lock_irqsave(&gspca_dev->qlock, flags); |
1346 | list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) { |
1347 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state); |
1348 | list_del(entry: &buf->list); |
1349 | } |
1350 | spin_unlock_irqrestore(lock: &gspca_dev->qlock, flags); |
1351 | } |
1352 | |
1353 | static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count) |
1354 | { |
1355 | struct gspca_dev *gspca_dev = vb2_get_drv_priv(q: vq); |
1356 | int ret; |
1357 | |
1358 | gspca_dev->sequence = 0; |
1359 | |
1360 | ret = gspca_init_transfer(gspca_dev); |
1361 | if (ret) |
1362 | gspca_return_all_buffers(gspca_dev, state: VB2_BUF_STATE_QUEUED); |
1363 | return ret; |
1364 | } |
1365 | |
1366 | static void gspca_stop_streaming(struct vb2_queue *vq) |
1367 | { |
1368 | struct gspca_dev *gspca_dev = vb2_get_drv_priv(q: vq); |
1369 | |
1370 | gspca_stream_off(gspca_dev); |
1371 | |
1372 | /* Release all active buffers */ |
1373 | gspca_return_all_buffers(gspca_dev, state: VB2_BUF_STATE_ERROR); |
1374 | } |
1375 | |
1376 | static const struct vb2_ops gspca_qops = { |
1377 | .queue_setup = gspca_queue_setup, |
1378 | .buf_prepare = gspca_buffer_prepare, |
1379 | .buf_finish = gspca_buffer_finish, |
1380 | .buf_queue = gspca_buffer_queue, |
1381 | .start_streaming = gspca_start_streaming, |
1382 | .stop_streaming = gspca_stop_streaming, |
1383 | .wait_prepare = vb2_ops_wait_prepare, |
1384 | .wait_finish = vb2_ops_wait_finish, |
1385 | }; |
1386 | |
1387 | static const struct v4l2_file_operations dev_fops = { |
1388 | .owner = THIS_MODULE, |
1389 | .open = v4l2_fh_open, |
1390 | .release = vb2_fop_release, |
1391 | .unlocked_ioctl = video_ioctl2, |
1392 | .read = vb2_fop_read, |
1393 | .mmap = vb2_fop_mmap, |
1394 | .poll = vb2_fop_poll, |
1395 | }; |
1396 | |
1397 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
1398 | .vidioc_querycap = vidioc_querycap, |
1399 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1400 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
1401 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
1402 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
1403 | .vidioc_enum_input = vidioc_enum_input, |
1404 | .vidioc_g_input = vidioc_g_input, |
1405 | .vidioc_s_input = vidioc_s_input, |
1406 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, |
1407 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, |
1408 | .vidioc_g_parm = vidioc_g_parm, |
1409 | .vidioc_s_parm = vidioc_s_parm, |
1410 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
1411 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
1412 | |
1413 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
1414 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
1415 | .vidioc_querybuf = vb2_ioctl_querybuf, |
1416 | .vidioc_qbuf = vb2_ioctl_qbuf, |
1417 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
1418 | .vidioc_expbuf = vb2_ioctl_expbuf, |
1419 | .vidioc_streamon = vb2_ioctl_streamon, |
1420 | .vidioc_streamoff = vb2_ioctl_streamoff, |
1421 | |
1422 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
1423 | .vidioc_g_chip_info = vidioc_g_chip_info, |
1424 | .vidioc_g_register = vidioc_g_register, |
1425 | .vidioc_s_register = vidioc_s_register, |
1426 | #endif |
1427 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
1428 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
1429 | }; |
1430 | |
1431 | static const struct video_device gspca_template = { |
1432 | .name = "gspca main driver" , |
1433 | .fops = &dev_fops, |
1434 | .ioctl_ops = &dev_ioctl_ops, |
1435 | .release = video_device_release_empty, /* We use v4l2_dev.release */ |
1436 | }; |
1437 | |
1438 | /* |
1439 | * probe and create a new gspca device |
1440 | * |
1441 | * This function must be called by the sub-driver when it is |
1442 | * called for probing a new device. |
1443 | */ |
1444 | int gspca_dev_probe2(struct usb_interface *intf, |
1445 | const struct usb_device_id *id, |
1446 | const struct sd_desc *sd_desc, |
1447 | int dev_size, |
1448 | struct module *module) |
1449 | { |
1450 | struct gspca_dev *gspca_dev; |
1451 | struct usb_device *dev = interface_to_usbdev(intf); |
1452 | struct vb2_queue *q; |
1453 | int ret; |
1454 | |
1455 | pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n" , |
1456 | sd_desc->name, id->idVendor, id->idProduct); |
1457 | |
1458 | /* create the device */ |
1459 | if (dev_size < sizeof *gspca_dev) |
1460 | dev_size = sizeof *gspca_dev; |
1461 | gspca_dev = kzalloc(size: dev_size, GFP_KERNEL); |
1462 | if (!gspca_dev) { |
1463 | pr_err("couldn't kzalloc gspca struct\n" ); |
1464 | return -ENOMEM; |
1465 | } |
1466 | gspca_dev->usb_buf = kzalloc(USB_BUF_SZ, GFP_KERNEL); |
1467 | if (!gspca_dev->usb_buf) { |
1468 | pr_err("out of memory\n" ); |
1469 | ret = -ENOMEM; |
1470 | goto out; |
1471 | } |
1472 | gspca_dev->dev = dev; |
1473 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
1474 | gspca_dev->xfer_ep = -1; |
1475 | |
1476 | /* check if any audio device */ |
1477 | if (dev->actconfig->desc.bNumInterfaces != 1) { |
1478 | int i; |
1479 | struct usb_interface *intf2; |
1480 | |
1481 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
1482 | intf2 = dev->actconfig->interface[i]; |
1483 | if (intf2 != NULL |
1484 | && intf2->altsetting != NULL |
1485 | && intf2->altsetting->desc.bInterfaceClass == |
1486 | USB_CLASS_AUDIO) { |
1487 | gspca_dev->audio = 1; |
1488 | break; |
1489 | } |
1490 | } |
1491 | } |
1492 | |
1493 | gspca_dev->v4l2_dev.release = gspca_release; |
1494 | ret = v4l2_device_register(dev: &intf->dev, v4l2_dev: &gspca_dev->v4l2_dev); |
1495 | if (ret) |
1496 | goto out; |
1497 | gspca_dev->present = true; |
1498 | gspca_dev->sd_desc = sd_desc; |
1499 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
1500 | gspca_dev->vdev = gspca_template; |
1501 | gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; |
1502 | gspca_dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | |
1503 | V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; |
1504 | video_set_drvdata(vdev: &gspca_dev->vdev, data: gspca_dev); |
1505 | gspca_dev->module = module; |
1506 | |
1507 | mutex_init(&gspca_dev->usb_lock); |
1508 | gspca_dev->vdev.lock = &gspca_dev->usb_lock; |
1509 | init_waitqueue_head(&gspca_dev->wq); |
1510 | |
1511 | /* Initialize the vb2 queue */ |
1512 | q = &gspca_dev->queue; |
1513 | q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1514 | q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ; |
1515 | q->drv_priv = gspca_dev; |
1516 | q->buf_struct_size = sizeof(struct gspca_buffer); |
1517 | q->ops = &gspca_qops; |
1518 | q->mem_ops = &vb2_vmalloc_memops; |
1519 | q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
1520 | q->min_queued_buffers = 2; |
1521 | q->lock = &gspca_dev->usb_lock; |
1522 | ret = vb2_queue_init(q); |
1523 | if (ret) |
1524 | goto out; |
1525 | gspca_dev->vdev.queue = q; |
1526 | |
1527 | INIT_LIST_HEAD(list: &gspca_dev->buf_list); |
1528 | spin_lock_init(&gspca_dev->qlock); |
1529 | |
1530 | /* configure the subdriver and initialize the USB device */ |
1531 | ret = sd_desc->config(gspca_dev, id); |
1532 | if (ret < 0) |
1533 | goto out; |
1534 | ret = sd_desc->init(gspca_dev); |
1535 | if (ret < 0) |
1536 | goto out; |
1537 | if (sd_desc->init_controls) |
1538 | ret = sd_desc->init_controls(gspca_dev); |
1539 | if (ret < 0) |
1540 | goto out; |
1541 | gspca_set_default_mode(gspca_dev); |
1542 | |
1543 | ret = gspca_input_connect(dev: gspca_dev); |
1544 | if (ret) |
1545 | goto out; |
1546 | |
1547 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
1548 | if (!gspca_dev->sd_desc->get_register) |
1549 | v4l2_disable_ioctl(vdev: &gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); |
1550 | if (!gspca_dev->sd_desc->set_register) |
1551 | v4l2_disable_ioctl(vdev: &gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); |
1552 | #endif |
1553 | if (!gspca_dev->sd_desc->get_jcomp) |
1554 | v4l2_disable_ioctl(vdev: &gspca_dev->vdev, VIDIOC_G_JPEGCOMP); |
1555 | if (!gspca_dev->sd_desc->set_jcomp) |
1556 | v4l2_disable_ioctl(vdev: &gspca_dev->vdev, VIDIOC_S_JPEGCOMP); |
1557 | |
1558 | /* init video stuff */ |
1559 | ret = video_register_device(vdev: &gspca_dev->vdev, |
1560 | type: VFL_TYPE_VIDEO, |
1561 | nr: -1); |
1562 | if (ret < 0) { |
1563 | pr_err("video_register_device err %d\n" , ret); |
1564 | goto out; |
1565 | } |
1566 | |
1567 | usb_set_intfdata(intf, data: gspca_dev); |
1568 | gspca_dbg(gspca_dev, D_PROBE, "%s created\n" , |
1569 | video_device_node_name(&gspca_dev->vdev)); |
1570 | |
1571 | gspca_input_create_urb(gspca_dev); |
1572 | |
1573 | return 0; |
1574 | out: |
1575 | #if IS_ENABLED(CONFIG_INPUT) |
1576 | if (gspca_dev->input_dev) |
1577 | input_unregister_device(gspca_dev->input_dev); |
1578 | #endif |
1579 | v4l2_ctrl_handler_free(hdl: gspca_dev->vdev.ctrl_handler); |
1580 | v4l2_device_unregister(v4l2_dev: &gspca_dev->v4l2_dev); |
1581 | if (sd_desc->probe_error) |
1582 | sd_desc->probe_error(gspca_dev); |
1583 | kfree(objp: gspca_dev->usb_buf); |
1584 | kfree(objp: gspca_dev); |
1585 | return ret; |
1586 | } |
1587 | EXPORT_SYMBOL(gspca_dev_probe2); |
1588 | |
1589 | /* same function as the previous one, but check the interface */ |
1590 | int gspca_dev_probe(struct usb_interface *intf, |
1591 | const struct usb_device_id *id, |
1592 | const struct sd_desc *sd_desc, |
1593 | int dev_size, |
1594 | struct module *module) |
1595 | { |
1596 | struct usb_device *dev = interface_to_usbdev(intf); |
1597 | |
1598 | /* we don't handle multi-config cameras */ |
1599 | if (dev->descriptor.bNumConfigurations != 1) { |
1600 | pr_err("%04x:%04x too many config\n" , |
1601 | id->idVendor, id->idProduct); |
1602 | return -ENODEV; |
1603 | } |
1604 | |
1605 | /* the USB video interface must be the first one */ |
1606 | if (dev->actconfig->desc.bNumInterfaces != 1 |
1607 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
1608 | return -ENODEV; |
1609 | |
1610 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); |
1611 | } |
1612 | EXPORT_SYMBOL(gspca_dev_probe); |
1613 | |
1614 | /* |
1615 | * USB disconnection |
1616 | * |
1617 | * This function must be called by the sub-driver |
1618 | * when the device disconnects, after the specific resources are freed. |
1619 | */ |
1620 | void gspca_disconnect(struct usb_interface *intf) |
1621 | { |
1622 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
1623 | #if IS_ENABLED(CONFIG_INPUT) |
1624 | struct input_dev *input_dev; |
1625 | #endif |
1626 | |
1627 | gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n" , |
1628 | video_device_node_name(&gspca_dev->vdev)); |
1629 | |
1630 | mutex_lock(&gspca_dev->usb_lock); |
1631 | gspca_dev->present = false; |
1632 | destroy_urbs(gspca_dev); |
1633 | gspca_input_destroy_urb(gspca_dev); |
1634 | |
1635 | vb2_queue_error(q: &gspca_dev->queue); |
1636 | |
1637 | #if IS_ENABLED(CONFIG_INPUT) |
1638 | input_dev = gspca_dev->input_dev; |
1639 | if (input_dev) { |
1640 | gspca_dev->input_dev = NULL; |
1641 | input_unregister_device(input_dev); |
1642 | } |
1643 | #endif |
1644 | |
1645 | v4l2_device_disconnect(v4l2_dev: &gspca_dev->v4l2_dev); |
1646 | video_unregister_device(vdev: &gspca_dev->vdev); |
1647 | |
1648 | mutex_unlock(lock: &gspca_dev->usb_lock); |
1649 | |
1650 | /* (this will call gspca_release() immediately or on last close) */ |
1651 | v4l2_device_put(v4l2_dev: &gspca_dev->v4l2_dev); |
1652 | } |
1653 | EXPORT_SYMBOL(gspca_disconnect); |
1654 | |
1655 | #ifdef CONFIG_PM |
1656 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) |
1657 | { |
1658 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
1659 | |
1660 | gspca_input_destroy_urb(gspca_dev); |
1661 | |
1662 | if (!vb2_start_streaming_called(q: &gspca_dev->queue)) |
1663 | return 0; |
1664 | |
1665 | mutex_lock(&gspca_dev->usb_lock); |
1666 | gspca_dev->frozen = 1; /* avoid urb error messages */ |
1667 | gspca_dev->usb_err = 0; |
1668 | if (gspca_dev->sd_desc->stopN) |
1669 | gspca_dev->sd_desc->stopN(gspca_dev); |
1670 | destroy_urbs(gspca_dev); |
1671 | gspca_set_alt0(gspca_dev); |
1672 | if (gspca_dev->sd_desc->stop0) |
1673 | gspca_dev->sd_desc->stop0(gspca_dev); |
1674 | mutex_unlock(lock: &gspca_dev->usb_lock); |
1675 | |
1676 | return 0; |
1677 | } |
1678 | EXPORT_SYMBOL(gspca_suspend); |
1679 | |
1680 | int gspca_resume(struct usb_interface *intf) |
1681 | { |
1682 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
1683 | int streaming, ret = 0; |
1684 | |
1685 | mutex_lock(&gspca_dev->usb_lock); |
1686 | gspca_dev->frozen = 0; |
1687 | gspca_dev->usb_err = 0; |
1688 | gspca_dev->sd_desc->init(gspca_dev); |
1689 | /* |
1690 | * Most subdrivers send all ctrl values on sd_start and thus |
1691 | * only write to the device registers on s_ctrl when streaming -> |
1692 | * Clear streaming to avoid setting all ctrls twice. |
1693 | */ |
1694 | streaming = vb2_start_streaming_called(q: &gspca_dev->queue); |
1695 | if (streaming) |
1696 | ret = gspca_init_transfer(gspca_dev); |
1697 | else |
1698 | gspca_input_create_urb(gspca_dev); |
1699 | mutex_unlock(lock: &gspca_dev->usb_lock); |
1700 | |
1701 | return ret; |
1702 | } |
1703 | EXPORT_SYMBOL(gspca_resume); |
1704 | #endif |
1705 | |
1706 | /* -- module insert / remove -- */ |
1707 | static int __init gspca_init(void) |
1708 | { |
1709 | pr_info("v" GSPCA_VERSION " registered\n" ); |
1710 | return 0; |
1711 | } |
1712 | static void __exit gspca_exit(void) |
1713 | { |
1714 | } |
1715 | |
1716 | module_init(gspca_init); |
1717 | module_exit(gspca_exit); |
1718 | |
1719 | module_param_named(debug, gspca_debug, int, 0644); |
1720 | MODULE_PARM_DESC(debug, |
1721 | "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo" ); |
1722 | |