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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
4 | * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #define MODULE_NAME "gspca" | |
22 | ||
23 | #include <linux/init.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/pagemap.h> | |
956e42d2 | 31 | #include <linux/io.h> |
63eb9546 | 32 | #include <asm/page.h> |
956e42d2 | 33 | #include <linux/uaccess.h> |
63eb9546 | 34 | #include <linux/jiffies.h> |
35ea11ff | 35 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
36 | |
37 | #include "gspca.h" | |
38 | ||
d43fa32f | 39 | /* global values */ |
ac0d6df6 | 40 | #define DEF_NURBS 2 /* default number of URBs */ |
d43fa32f | 41 | |
63eb9546 JFM |
42 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
43 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
bb64e86c | 46 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 2, 0) |
63eb9546 JFM |
47 | |
48 | static int video_nr = -1; | |
49 | ||
d646e701 | 50 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
51 | int gspca_debug = D_ERR | D_PROBE; |
52 | EXPORT_SYMBOL(gspca_debug); | |
53 | ||
54 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
55 | { | |
56 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
57 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
58 | txt, | |
59 | pixfmt & 0xff, | |
60 | (pixfmt >> 8) & 0xff, | |
61 | (pixfmt >> 16) & 0xff, | |
62 | pixfmt >> 24, | |
63 | w, h); | |
64 | } else { | |
65 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
66 | txt, | |
67 | pixfmt, | |
68 | w, h); | |
69 | } | |
70 | } | |
71 | #else | |
72 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
73 | #endif | |
74 | ||
d43fa32f JFM |
75 | /* specific memory types - !! should different from V4L2_MEMORY_xxx */ |
76 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ | |
77 | #define GSPCA_MEMORY_READ 7 | |
78 | ||
d43fa32f | 79 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 80 | |
63eb9546 JFM |
81 | /* |
82 | * VMA operations. | |
83 | */ | |
84 | static void gspca_vm_open(struct vm_area_struct *vma) | |
85 | { | |
86 | struct gspca_frame *frame = vma->vm_private_data; | |
87 | ||
88 | frame->vma_use_count++; | |
89 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
90 | } | |
91 | ||
92 | static void gspca_vm_close(struct vm_area_struct *vma) | |
93 | { | |
94 | struct gspca_frame *frame = vma->vm_private_data; | |
95 | ||
96 | if (--frame->vma_use_count <= 0) | |
97 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
98 | } | |
99 | ||
100 | static struct vm_operations_struct gspca_vm_ops = { | |
101 | .open = gspca_vm_open, | |
102 | .close = gspca_vm_close, | |
103 | }; | |
104 | ||
105 | /* | |
d43fa32f | 106 | * fill a video frame from an URB and resubmit |
63eb9546 | 107 | */ |
d43fa32f JFM |
108 | static void fill_frame(struct gspca_dev *gspca_dev, |
109 | struct urb *urb) | |
63eb9546 | 110 | { |
63eb9546 | 111 | struct gspca_frame *frame; |
6a7eba24 | 112 | __u8 *data; /* address of data in the iso message */ |
63eb9546 JFM |
113 | int i, j, len, st; |
114 | cam_pkt_op pkt_scan; | |
115 | ||
6a7eba24 JFM |
116 | if (urb->status != 0) { |
117 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
118 | return; /* disconnection ? */ | |
119 | } | |
63eb9546 JFM |
120 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
121 | for (i = 0; i < urb->number_of_packets; i++) { | |
122 | ||
123 | /* check the availability of the frame buffer */ | |
124 | j = gspca_dev->fr_i; | |
125 | j = gspca_dev->fr_queue[j]; | |
126 | frame = &gspca_dev->frame[j]; | |
d43fa32f | 127 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
63eb9546 JFM |
128 | != V4L2_BUF_FLAG_QUEUED) { |
129 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
130 | break; | |
131 | } | |
132 | ||
133 | /* check the packet status and length */ | |
134 | len = urb->iso_frame_desc[i].actual_length; | |
6a7eba24 JFM |
135 | if (len == 0) |
136 | continue; | |
63eb9546 JFM |
137 | st = urb->iso_frame_desc[i].status; |
138 | if (st) { | |
6a7eba24 JFM |
139 | PDEBUG(D_ERR, |
140 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
141 | i, len, st); |
142 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
143 | continue; | |
144 | } | |
63eb9546 JFM |
145 | |
146 | /* let the packet be analyzed by the subdriver */ | |
147 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
148 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 149 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
150 | + urb->iso_frame_desc[i].offset; |
151 | pkt_scan(gspca_dev, frame, data, len); | |
152 | } | |
153 | ||
154 | /* resubmit the URB */ | |
155 | urb->status = 0; | |
156 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
157 | if (st < 0) | |
158 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
159 | } | |
160 | ||
d43fa32f JFM |
161 | /* |
162 | * ISOC message interrupt from the USB device | |
163 | * | |
ac0d6df6 | 164 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 165 | */ |
ac0d6df6 | 166 | static void isoc_irq(struct urb *urb |
6a7eba24 | 167 | ) |
d43fa32f JFM |
168 | { |
169 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
170 | ||
3647fea8 | 171 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
172 | if (!gspca_dev->streaming) |
173 | return; | |
174 | fill_frame(gspca_dev, urb); | |
175 | } | |
176 | ||
63eb9546 JFM |
177 | /* |
178 | * add data to the current frame | |
179 | * | |
ac0d6df6 JFM |
180 | * This function is called by the subdrivers at interrupt level. |
181 | * | |
63eb9546 JFM |
182 | * To build a frame, these ones must add |
183 | * - one FIRST_PACKET | |
184 | * - 0 or many INTER_PACKETs | |
185 | * - one LAST_PACKET | |
186 | * DISCARD_PACKET invalidates the whole frame. | |
187 | * On LAST_PACKET, a new frame is returned. | |
188 | */ | |
189 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
190 | int packet_type, | |
191 | struct gspca_frame *frame, | |
a5ae2062 | 192 | const __u8 *data, |
63eb9546 JFM |
193 | int len) |
194 | { | |
195 | int i, j; | |
196 | ||
e2997a72 | 197 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
198 | |
199 | /* when start of a new frame, if the current frame buffer | |
200 | * is not queued, discard the whole frame */ | |
201 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
202 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
203 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
204 | gspca_dev->last_packet_type = DISCARD_PACKET; |
205 | return frame; | |
206 | } | |
207 | frame->data_end = frame->data; | |
208 | jiffies_to_timeval(get_jiffies_64(), | |
209 | &frame->v4l2_buf.timestamp); | |
210 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 211 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
212 | if (packet_type == LAST_PACKET) |
213 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 214 | return frame; |
d43fa32f | 215 | } |
63eb9546 | 216 | |
d43fa32f | 217 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
218 | if (len > 0) { |
219 | if (frame->data_end - frame->data + len | |
220 | > frame->v4l2_buf.length) { | |
a9e11134 | 221 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
222 | frame->data_end - frame->data + len, |
223 | frame->v4l2_buf.length); | |
224 | packet_type = DISCARD_PACKET; | |
225 | } else { | |
ac0d6df6 | 226 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
227 | frame->data_end += len; |
228 | } | |
229 | } | |
230 | gspca_dev->last_packet_type = packet_type; | |
231 | ||
232 | /* if last packet, wake the application and advance in the queue */ | |
233 | if (packet_type == LAST_PACKET) { | |
234 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
235 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
236 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
237 | atomic_inc(&gspca_dev->nevent); | |
238 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
239 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
240 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
241 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
242 | frame->v4l2_buf.bytesused, | |
243 | gspca_dev->fr_q, | |
244 | i, | |
245 | gspca_dev->fr_o); | |
246 | j = gspca_dev->fr_queue[i]; | |
247 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
248 | } |
249 | return frame; | |
250 | } | |
251 | EXPORT_SYMBOL(gspca_frame_add); | |
252 | ||
253 | static int gspca_is_compressed(__u32 format) | |
254 | { | |
255 | switch (format) { | |
256 | case V4L2_PIX_FMT_MJPEG: | |
257 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 258 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 259 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
260 | return 1; |
261 | } | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static void *rvmalloc(unsigned long size) | |
266 | { | |
267 | void *mem; | |
268 | unsigned long adr; | |
269 | ||
d43fa32f | 270 | /* size = PAGE_ALIGN(size); (already done) */ |
63eb9546 | 271 | mem = vmalloc_32(size); |
efab8211 | 272 | if (mem != NULL) { |
63eb9546 JFM |
273 | adr = (unsigned long) mem; |
274 | while ((long) size > 0) { | |
275 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
276 | adr += PAGE_SIZE; | |
277 | size -= PAGE_SIZE; | |
278 | } | |
279 | } | |
280 | return mem; | |
281 | } | |
282 | ||
ac0d6df6 | 283 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
284 | { |
285 | unsigned long adr; | |
286 | ||
63eb9546 | 287 | adr = (unsigned long) mem; |
ac0d6df6 | 288 | while (size > 0) { |
63eb9546 JFM |
289 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
290 | adr += PAGE_SIZE; | |
291 | size -= PAGE_SIZE; | |
292 | } | |
293 | vfree(mem); | |
294 | } | |
295 | ||
296 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 297 | unsigned int count) |
63eb9546 | 298 | { |
d43fa32f JFM |
299 | struct gspca_frame *frame; |
300 | unsigned int frsz; | |
301 | int i; | |
63eb9546 | 302 | |
c2446b3e JFM |
303 | i = gspca_dev->curr_mode; |
304 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 305 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 306 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 307 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
308 | if (count > GSPCA_MAX_FRAMES) |
309 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
310 | gspca_dev->frbuf = rvmalloc(frsz * count); |
311 | if (!gspca_dev->frbuf) { | |
312 | err("frame alloc failed"); | |
313 | return -ENOMEM; | |
63eb9546 JFM |
314 | } |
315 | gspca_dev->nframes = count; | |
316 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
317 | frame = &gspca_dev->frame[i]; |
318 | frame->v4l2_buf.index = i; | |
319 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
320 | frame->v4l2_buf.flags = 0; | |
321 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
322 | frame->v4l2_buf.length = frsz; | |
323 | frame->v4l2_buf.memory = gspca_dev->memory; | |
324 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 325 | frame->data = frame->data_end = |
d43fa32f | 326 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 327 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
328 | } |
329 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
330 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
331 | gspca_dev->sequence = 0; | |
332 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 333 | return 0; |
63eb9546 JFM |
334 | } |
335 | ||
336 | static void frame_free(struct gspca_dev *gspca_dev) | |
337 | { | |
338 | int i; | |
339 | ||
340 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 341 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
342 | rvfree(gspca_dev->frbuf, |
343 | gspca_dev->nframes * gspca_dev->frsz); | |
344 | gspca_dev->frbuf = NULL; | |
345 | for (i = 0; i < gspca_dev->nframes; i++) | |
346 | gspca_dev->frame[i].data = NULL; | |
347 | } | |
348 | gspca_dev->nframes = 0; | |
349 | } | |
350 | ||
d43fa32f | 351 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
352 | { |
353 | struct urb *urb; | |
354 | unsigned int i; | |
355 | ||
356 | PDEBUG(D_STREAM, "kill transfer"); | |
d43fa32f | 357 | for (i = 0; i < MAX_NURBS; ++i) { |
4aa0d037 | 358 | urb = gspca_dev->urb[i]; |
63eb9546 | 359 | if (urb == NULL) |
d43fa32f | 360 | break; |
63eb9546 | 361 | |
4aa0d037 | 362 | gspca_dev->urb[i] = NULL; |
63eb9546 | 363 | usb_kill_urb(urb); |
efab8211 | 364 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
365 | usb_buffer_free(gspca_dev->dev, |
366 | urb->transfer_buffer_length, | |
4aa0d037 | 367 | urb->transfer_buffer, |
63eb9546 | 368 | urb->transfer_dma); |
63eb9546 JFM |
369 | usb_free_urb(urb); |
370 | } | |
63eb9546 JFM |
371 | } |
372 | ||
373 | /* | |
374 | * search an input isochronous endpoint in an alternate setting | |
375 | */ | |
376 | static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt, | |
377 | __u8 epaddr) | |
378 | { | |
379 | struct usb_host_endpoint *ep; | |
380 | int i, attr; | |
381 | ||
382 | epaddr |= USB_DIR_IN; | |
383 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
384 | ep = &alt->endpoint[i]; | |
385 | if (ep->desc.bEndpointAddress == epaddr) { | |
386 | attr = ep->desc.bmAttributes | |
387 | & USB_ENDPOINT_XFERTYPE_MASK; | |
388 | if (attr == USB_ENDPOINT_XFER_ISOC) | |
389 | return ep; | |
390 | break; | |
391 | } | |
392 | } | |
393 | return NULL; | |
394 | } | |
395 | ||
396 | /* | |
397 | * search an input isochronous endpoint | |
398 | * | |
399 | * The endpoint is defined by the subdriver. | |
400 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
401 | * This routine may be called many times when the bandwidth is too small | |
402 | * (the bandwidth is checked on urb submit). | |
403 | */ | |
903e10aa | 404 | static struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
405 | { |
406 | struct usb_interface *intf; | |
407 | struct usb_host_endpoint *ep; | |
408 | int i, ret; | |
409 | ||
410 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 411 | ep = NULL; |
63eb9546 JFM |
412 | i = gspca_dev->alt; /* previous alt setting */ |
413 | while (--i > 0) { /* alt 0 is unusable */ | |
414 | ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr); | |
415 | if (ep) | |
416 | break; | |
417 | } | |
6a7eba24 | 418 | if (ep == NULL) { |
63eb9546 JFM |
419 | err("no ISOC endpoint found"); |
420 | return NULL; | |
421 | } | |
422 | PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x", | |
423 | i, ep->desc.bEndpointAddress); | |
424 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
425 | if (ret < 0) { | |
426 | err("set interface err %d", ret); | |
427 | return NULL; | |
428 | } | |
d43fa32f | 429 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
430 | return ep; |
431 | } | |
432 | ||
433 | /* | |
434 | * create the isochronous URBs | |
435 | */ | |
436 | static int create_urbs(struct gspca_dev *gspca_dev, | |
437 | struct usb_host_endpoint *ep) | |
438 | { | |
439 | struct urb *urb; | |
d43fa32f | 440 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
441 | |
442 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 443 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 444 | |
63eb9546 JFM |
445 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
446 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
447 | npkt = ISO_MAX_SIZE / psize; | |
448 | if (npkt > ISO_MAX_PKT) | |
449 | npkt = ISO_MAX_PKT; | |
450 | bsize = psize * npkt; | |
63eb9546 JFM |
451 | PDEBUG(D_STREAM, |
452 | "isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize); | |
ac0d6df6 | 453 | nurbs = DEF_NURBS; |
6a7eba24 | 454 | gspca_dev->nurbs = nurbs; |
d43fa32f | 455 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
456 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
457 | if (!urb) { | |
458 | err("usb_alloc_urb failed"); | |
459 | return -ENOMEM; | |
460 | } | |
4aa0d037 | 461 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
462 | bsize, |
463 | GFP_KERNEL, | |
464 | &urb->transfer_dma); | |
465 | ||
4aa0d037 | 466 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 467 | usb_free_urb(urb); |
d43fa32f | 468 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
469 | err("usb_buffer_urb failed"); |
470 | return -ENOMEM; | |
471 | } | |
4aa0d037 | 472 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
473 | urb->dev = gspca_dev->dev; |
474 | urb->context = gspca_dev; | |
475 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
476 | ep->desc.bEndpointAddress); | |
4aa0d037 JFM |
477 | urb->transfer_flags = URB_ISO_ASAP |
478 | | URB_NO_TRANSFER_DMA_MAP; | |
63eb9546 | 479 | urb->interval = ep->desc.bInterval; |
ac0d6df6 | 480 | urb->complete = isoc_irq; |
63eb9546 JFM |
481 | urb->number_of_packets = npkt; |
482 | urb->transfer_buffer_length = bsize; | |
483 | for (i = 0; i < npkt; i++) { | |
484 | urb->iso_frame_desc[i].length = psize; | |
485 | urb->iso_frame_desc[i].offset = psize * i; | |
486 | } | |
487 | } | |
488 | return 0; | |
489 | } | |
490 | ||
491 | /* | |
492 | * start the USB transfer | |
493 | */ | |
494 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
495 | { | |
63eb9546 JFM |
496 | struct usb_host_endpoint *ep; |
497 | int n, ret; | |
498 | ||
e2997a72 HG |
499 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
500 | return -ERESTARTSYS; | |
63eb9546 | 501 | |
d43fa32f JFM |
502 | /* set the higher alternate setting and |
503 | * loop until urb submit succeeds */ | |
504 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 505 | for (;;) { |
d43fa32f | 506 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
63eb9546 JFM |
507 | ep = get_isoc_ep(gspca_dev); |
508 | if (ep == NULL) { | |
509 | ret = -EIO; | |
510 | goto out; | |
511 | } | |
512 | ret = create_urbs(gspca_dev, ep); | |
513 | if (ret < 0) | |
514 | goto out; | |
515 | ||
516 | /* start the cam */ | |
517 | gspca_dev->sd_desc->start(gspca_dev); | |
518 | gspca_dev->streaming = 1; | |
519 | atomic_set(&gspca_dev->nevent, 0); | |
520 | ||
521 | /* submit the URBs */ | |
d43fa32f | 522 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 523 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
524 | if (ret < 0) { |
525 | PDEBUG(D_ERR|D_STREAM, | |
526 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 527 | gspca_dev->streaming = 0; |
d43fa32f | 528 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
529 | if (ret == -ENOSPC) |
530 | break; /* try the previous alt */ | |
531 | goto out; | |
532 | } | |
533 | } | |
534 | if (ret >= 0) | |
535 | break; | |
536 | } | |
537 | out: | |
538 | mutex_unlock(&gspca_dev->usb_lock); | |
539 | return ret; | |
540 | } | |
541 | ||
542 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
543 | { | |
544 | int ret; | |
545 | ||
546 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
547 | if (ret < 0) | |
548 | PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret); | |
549 | return ret; | |
550 | } | |
551 | ||
e2997a72 | 552 | /* Note both the queue and the usb lock should be hold when calling this */ |
63eb9546 JFM |
553 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
554 | { | |
63eb9546 | 555 | gspca_dev->streaming = 0; |
d43fa32f | 556 | atomic_set(&gspca_dev->nevent, 0); |
63eb9546 JFM |
557 | if (gspca_dev->present) { |
558 | gspca_dev->sd_desc->stopN(gspca_dev); | |
d43fa32f | 559 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
560 | gspca_set_alt0(gspca_dev); |
561 | gspca_dev->sd_desc->stop0(gspca_dev); | |
562 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 | 563 | } |
63eb9546 JFM |
564 | } |
565 | ||
d43fa32f | 566 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
567 | { |
568 | int i; | |
569 | ||
570 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
571 | gspca_dev->curr_mode = i; | |
572 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
573 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 574 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
575 | } |
576 | ||
577 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
578 | int width, int height) | |
579 | { | |
580 | int i; | |
581 | ||
d43fa32f JFM |
582 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
583 | if (width >= gspca_dev->cam.cam_mode[i].width | |
584 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
585 | break; |
586 | } | |
63eb9546 JFM |
587 | return i; |
588 | } | |
589 | ||
63eb9546 JFM |
590 | /* |
591 | * search a mode with the right pixel format | |
592 | */ | |
593 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
594 | int mode, | |
595 | int pixfmt) | |
596 | { | |
597 | int modeU, modeD; | |
598 | ||
599 | modeU = modeD = mode; | |
600 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
601 | if (--modeD >= 0) { | |
c2446b3e JFM |
602 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
603 | == pixfmt) | |
63eb9546 JFM |
604 | return modeD; |
605 | } | |
606 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
607 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
608 | == pixfmt) | |
63eb9546 JFM |
609 | return modeU; |
610 | } | |
611 | } | |
612 | return -EINVAL; | |
613 | } | |
614 | ||
e078770a | 615 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
616 | struct v4l2_fmtdesc *fmtdesc) |
617 | { | |
618 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 619 | int i, j, index; |
63eb9546 JFM |
620 | __u32 fmt_tb[8]; |
621 | ||
63eb9546 JFM |
622 | /* give an index to each format */ |
623 | index = 0; | |
624 | j = 0; | |
625 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 626 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
627 | j = 0; |
628 | for (;;) { | |
629 | if (fmt_tb[j] == fmt_tb[index]) | |
630 | break; | |
631 | j++; | |
632 | } | |
633 | if (j == index) { | |
634 | if (fmtdesc->index == index) | |
635 | break; /* new format */ | |
636 | index++; | |
637 | if (index >= sizeof fmt_tb / sizeof fmt_tb[0]) | |
638 | return -EINVAL; | |
639 | } | |
640 | } | |
641 | if (i < 0) | |
642 | return -EINVAL; /* no more format */ | |
643 | ||
63eb9546 JFM |
644 | fmtdesc->pixelformat = fmt_tb[index]; |
645 | if (gspca_is_compressed(fmt_tb[index])) | |
646 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 647 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
648 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
649 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
650 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
651 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
652 | fmtdesc->description[4] = '\0'; | |
653 | return 0; | |
654 | } | |
655 | ||
e078770a | 656 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
657 | struct v4l2_format *fmt) |
658 | { | |
659 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 660 | int mode; |
63eb9546 | 661 | |
6a7eba24 JFM |
662 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
663 | return -EINVAL; | |
c2446b3e JFM |
664 | mode = gspca_dev->curr_mode; |
665 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
666 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
667 | return 0; |
668 | } | |
669 | ||
e078770a | 670 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
671 | struct v4l2_format *fmt) |
672 | { | |
24c530b4 | 673 | int w, h, mode, mode2; |
63eb9546 | 674 | |
6a7eba24 JFM |
675 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
676 | return -EINVAL; | |
4aa0d037 JFM |
677 | w = fmt->fmt.pix.width; |
678 | h = fmt->fmt.pix.height; | |
d43fa32f | 679 | |
d646e701 | 680 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
681 | if (gspca_debug & D_CONF) |
682 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
683 | #endif | |
684 | /* search the closest mode for width and height */ | |
685 | mode = wxh_to_mode(gspca_dev, w, h); | |
686 | ||
687 | /* OK if right palette */ | |
c2446b3e JFM |
688 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
689 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
690 | |
691 | /* else, search the closest mode with the same pixel format */ | |
692 | mode2 = gspca_get_mode(gspca_dev, mode, | |
693 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 694 | if (mode2 >= 0) |
63eb9546 | 695 | mode = mode2; |
c2446b3e JFM |
696 | /* else |
697 | ; * no chance, return this mode */ | |
63eb9546 | 698 | } |
c2446b3e JFM |
699 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
700 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
701 | return mode; /* used when s_fmt */ |
702 | } | |
703 | ||
e078770a | 704 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
705 | void *priv, |
706 | struct v4l2_format *fmt) | |
707 | { | |
4aa0d037 | 708 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
709 | int ret; |
710 | ||
e078770a | 711 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
712 | if (ret < 0) |
713 | return ret; | |
714 | return 0; | |
715 | } | |
716 | ||
e078770a | 717 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
718 | struct v4l2_format *fmt) |
719 | { | |
720 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 721 | int ret; |
63eb9546 | 722 | |
e2997a72 HG |
723 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
724 | return -ERESTARTSYS; | |
d43fa32f | 725 | |
e078770a | 726 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
727 | if (ret < 0) |
728 | goto out; | |
729 | ||
d43fa32f JFM |
730 | if (gspca_dev->nframes != 0 |
731 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
732 | ret = -EINVAL; | |
733 | goto out; | |
734 | } | |
735 | ||
50a871fe JFM |
736 | if (ret == gspca_dev->curr_mode) { |
737 | ret = 0; | |
63eb9546 | 738 | goto out; /* same mode */ |
50a871fe | 739 | } |
d43fa32f JFM |
740 | |
741 | if (gspca_dev->streaming) { | |
742 | ret = -EBUSY; | |
743 | goto out; | |
e2997a72 | 744 | } |
4aa0d037 JFM |
745 | gspca_dev->width = fmt->fmt.pix.width; |
746 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
747 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
748 | gspca_dev->curr_mode = ret; | |
d43fa32f | 749 | |
d43fa32f | 750 | ret = 0; |
63eb9546 JFM |
751 | out: |
752 | mutex_unlock(&gspca_dev->queue_lock); | |
753 | return ret; | |
754 | } | |
755 | ||
756 | static int dev_open(struct inode *inode, struct file *file) | |
757 | { | |
758 | struct gspca_dev *gspca_dev; | |
759 | int ret; | |
760 | ||
d43fa32f | 761 | PDEBUG(D_STREAM, "%s open", current->comm); |
63eb9546 | 762 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
763 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
764 | return -ERESTARTSYS; | |
63eb9546 JFM |
765 | if (!gspca_dev->present) { |
766 | ret = -ENODEV; | |
767 | goto out; | |
768 | } | |
769 | ||
770 | /* if not done yet, initialize the sensor */ | |
771 | if (gspca_dev->users == 0) { | |
e2997a72 HG |
772 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
773 | ret = -ERESTARTSYS; | |
63eb9546 | 774 | goto out; |
e2997a72 | 775 | } |
63eb9546 JFM |
776 | ret = gspca_dev->sd_desc->open(gspca_dev); |
777 | mutex_unlock(&gspca_dev->usb_lock); | |
778 | if (ret != 0) { | |
779 | PDEBUG(D_ERR|D_CONF, "init device failed %d", ret); | |
780 | goto out; | |
781 | } | |
e2997a72 | 782 | } else if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
783 | ret = -EBUSY; |
784 | goto out; | |
785 | } | |
786 | gspca_dev->users++; | |
787 | file->private_data = gspca_dev; | |
d646e701 | 788 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 | 789 | /* activate the v4l2 debug */ |
d43fa32f | 790 | if (gspca_debug & D_V4L2) |
63eb9546 JFM |
791 | gspca_dev->vdev.debug |= 3; |
792 | else | |
793 | gspca_dev->vdev.debug &= ~3; | |
794 | #endif | |
795 | out: | |
796 | mutex_unlock(&gspca_dev->queue_lock); | |
797 | if (ret != 0) | |
798 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
799 | else | |
d43fa32f | 800 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
801 | return ret; |
802 | } | |
803 | ||
804 | static int dev_close(struct inode *inode, struct file *file) | |
805 | { | |
806 | struct gspca_dev *gspca_dev = file->private_data; | |
807 | ||
d43fa32f | 808 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
809 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
810 | return -ERESTARTSYS; | |
811 | gspca_dev->users--; | |
e2997a72 | 812 | |
5b77ae77 | 813 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 JFM |
814 | if (gspca_dev->capt_file == file) { |
815 | mutex_lock(&gspca_dev->usb_lock); | |
816 | if (gspca_dev->streaming) | |
817 | gspca_stream_off(gspca_dev); | |
818 | gspca_dev->sd_desc->close(gspca_dev); | |
819 | mutex_unlock(&gspca_dev->usb_lock); | |
820 | frame_free(gspca_dev); | |
efab8211 | 821 | gspca_dev->capt_file = NULL; |
d43fa32f | 822 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 823 | } |
d43fa32f | 824 | file->private_data = NULL; |
63eb9546 | 825 | mutex_unlock(&gspca_dev->queue_lock); |
d43fa32f | 826 | PDEBUG(D_STREAM, "close done"); |
63eb9546 JFM |
827 | return 0; |
828 | } | |
829 | ||
830 | static int vidioc_querycap(struct file *file, void *priv, | |
831 | struct v4l2_capability *cap) | |
832 | { | |
833 | struct gspca_dev *gspca_dev = priv; | |
834 | ||
63eb9546 JFM |
835 | memset(cap, 0, sizeof *cap); |
836 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
c6edaf16 JFM |
837 | /* strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card); */ |
838 | if (gspca_dev->dev->product != NULL) { | |
839 | strncpy(cap->card, gspca_dev->dev->product, | |
840 | sizeof cap->card); | |
841 | } else { | |
842 | snprintf(cap->card, sizeof cap->card, | |
843 | "USB Camera (%04x:%04x)", | |
844 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
845 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
846 | } | |
63eb9546 JFM |
847 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, |
848 | sizeof cap->bus_info); | |
849 | cap->version = DRIVER_VERSION_NUMBER; | |
850 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
851 | | V4L2_CAP_STREAMING | |
852 | | V4L2_CAP_READWRITE; | |
853 | return 0; | |
854 | } | |
855 | ||
6a7eba24 | 856 | /* the use of V4L2_CTRL_FLAG_NEXT_CTRL asks for the controls to be sorted */ |
63eb9546 JFM |
857 | static int vidioc_queryctrl(struct file *file, void *priv, |
858 | struct v4l2_queryctrl *q_ctrl) | |
859 | { | |
860 | struct gspca_dev *gspca_dev = priv; | |
861 | int i; | |
6a7eba24 JFM |
862 | u32 id; |
863 | ||
864 | id = q_ctrl->id; | |
865 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
866 | id &= V4L2_CTRL_ID_MASK; | |
867 | id++; | |
868 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
869 | if (id >= gspca_dev->sd_desc->ctrls[i].qctrl.id) { | |
870 | memcpy(q_ctrl, | |
871 | &gspca_dev->sd_desc->ctrls[i].qctrl, | |
872 | sizeof *q_ctrl); | |
873 | return 0; | |
874 | } | |
875 | } | |
876 | return -EINVAL; | |
877 | } | |
63eb9546 | 878 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 879 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
63eb9546 JFM |
880 | memcpy(q_ctrl, |
881 | &gspca_dev->sd_desc->ctrls[i].qctrl, | |
882 | sizeof *q_ctrl); | |
883 | return 0; | |
884 | } | |
885 | } | |
6a7eba24 JFM |
886 | if (id >= V4L2_CID_BASE |
887 | && id <= V4L2_CID_LASTP1) { | |
63eb9546 JFM |
888 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; |
889 | return 0; | |
890 | } | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
895 | struct v4l2_control *ctrl) | |
896 | { | |
897 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 898 | const struct ctrl *ctrls; |
63eb9546 JFM |
899 | int i, ret; |
900 | ||
63eb9546 JFM |
901 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
902 | i < gspca_dev->sd_desc->nctrls; | |
903 | i++, ctrls++) { | |
904 | if (ctrl->id != ctrls->qctrl.id) | |
905 | continue; | |
906 | if (ctrl->value < ctrls->qctrl.minimum | |
907 | && ctrl->value > ctrls->qctrl.maximum) | |
908 | return -ERANGE; | |
909 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
910 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
911 | return -ERESTARTSYS; | |
63eb9546 JFM |
912 | ret = ctrls->set(gspca_dev, ctrl->value); |
913 | mutex_unlock(&gspca_dev->usb_lock); | |
914 | return ret; | |
915 | } | |
916 | return -EINVAL; | |
917 | } | |
918 | ||
919 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
920 | struct v4l2_control *ctrl) | |
921 | { | |
922 | struct gspca_dev *gspca_dev = priv; | |
923 | ||
a5ae2062 | 924 | const struct ctrl *ctrls; |
63eb9546 JFM |
925 | int i, ret; |
926 | ||
927 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
928 | i < gspca_dev->sd_desc->nctrls; | |
929 | i++, ctrls++) { | |
930 | if (ctrl->id != ctrls->qctrl.id) | |
931 | continue; | |
e2997a72 HG |
932 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
933 | return -ERESTARTSYS; | |
63eb9546 JFM |
934 | ret = ctrls->get(gspca_dev, &ctrl->value); |
935 | mutex_unlock(&gspca_dev->usb_lock); | |
936 | return ret; | |
937 | } | |
938 | return -EINVAL; | |
939 | } | |
940 | ||
941 | static int vidioc_querymenu(struct file *file, void *priv, | |
942 | struct v4l2_querymenu *qmenu) | |
943 | { | |
944 | struct gspca_dev *gspca_dev = priv; | |
945 | ||
946 | if (!gspca_dev->sd_desc->querymenu) | |
947 | return -EINVAL; | |
948 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
949 | } | |
950 | ||
951 | static int vidioc_enum_input(struct file *file, void *priv, | |
952 | struct v4l2_input *input) | |
953 | { | |
954 | struct gspca_dev *gspca_dev = priv; | |
955 | ||
956 | if (input->index != 0) | |
957 | return -EINVAL; | |
958 | memset(input, 0, sizeof *input); | |
959 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
960 | strncpy(input->name, gspca_dev->sd_desc->name, | |
961 | sizeof input->name); | |
962 | return 0; | |
963 | } | |
964 | ||
965 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
966 | { | |
967 | *i = 0; | |
968 | return 0; | |
969 | } | |
970 | ||
971 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
972 | { | |
973 | if (i > 0) | |
974 | return -EINVAL; | |
975 | return (0); | |
976 | } | |
977 | ||
978 | static int vidioc_reqbufs(struct file *file, void *priv, | |
979 | struct v4l2_requestbuffers *rb) | |
980 | { | |
981 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 982 | int i, ret = 0; |
63eb9546 | 983 | |
63eb9546 JFM |
984 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
985 | return -EINVAL; | |
d43fa32f | 986 | switch (rb->memory) { |
5b77ae77 | 987 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 988 | case V4L2_MEMORY_MMAP: |
d43fa32f | 989 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 990 | break; |
d43fa32f | 991 | default: |
63eb9546 | 992 | return -EINVAL; |
d43fa32f | 993 | } |
e2997a72 HG |
994 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
995 | return -ERESTARTSYS; | |
d43fa32f | 996 | |
5b77ae77 JFM |
997 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
998 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
999 | ret = -EBUSY; |
1000 | goto out; | |
1001 | } | |
d43fa32f | 1002 | |
5b77ae77 JFM |
1003 | /* only one file may do the capture */ |
1004 | if (gspca_dev->capt_file != NULL | |
1005 | && gspca_dev->capt_file != file) { | |
1006 | ret = -EBUSY; | |
1007 | goto out; | |
1008 | } | |
1009 | ||
1010 | /* if allocated, the buffers must not be mapped */ | |
1011 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1012 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1013 | ret = -EBUSY; |
1014 | goto out; | |
1015 | } | |
5b77ae77 JFM |
1016 | } |
1017 | ||
1018 | /* stop streaming */ | |
1019 | if (gspca_dev->streaming) { | |
1020 | mutex_lock(&gspca_dev->usb_lock); | |
1021 | gspca_stream_off(gspca_dev); | |
1022 | mutex_unlock(&gspca_dev->usb_lock); | |
1023 | } | |
1024 | ||
1025 | /* free the previous allocated buffers, if any */ | |
1026 | if (gspca_dev->nframes != 0) { | |
1027 | frame_free(gspca_dev); | |
1028 | gspca_dev->capt_file = NULL; | |
1029 | } | |
1030 | if (rb->count == 0) /* unrequest */ | |
1031 | goto out; | |
1032 | gspca_dev->memory = rb->memory; | |
1033 | ret = frame_alloc(gspca_dev, rb->count); | |
1034 | if (ret == 0) { | |
1035 | rb->count = gspca_dev->nframes; | |
1036 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1037 | } |
1038 | out: | |
63eb9546 JFM |
1039 | mutex_unlock(&gspca_dev->queue_lock); |
1040 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1041 | return ret; | |
1042 | } | |
1043 | ||
1044 | static int vidioc_querybuf(struct file *file, void *priv, | |
1045 | struct v4l2_buffer *v4l2_buf) | |
1046 | { | |
1047 | struct gspca_dev *gspca_dev = priv; | |
1048 | struct gspca_frame *frame; | |
1049 | ||
63eb9546 JFM |
1050 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1051 | || v4l2_buf->index < 0 | |
1052 | || v4l2_buf->index >= gspca_dev->nframes) | |
1053 | return -EINVAL; | |
1054 | ||
1055 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1056 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | static int vidioc_streamon(struct file *file, void *priv, | |
1061 | enum v4l2_buf_type buf_type) | |
1062 | { | |
1063 | struct gspca_dev *gspca_dev = priv; | |
1064 | int ret; | |
1065 | ||
63eb9546 JFM |
1066 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1067 | return -EINVAL; | |
e2997a72 HG |
1068 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1069 | return -ERESTARTSYS; | |
63eb9546 JFM |
1070 | if (!gspca_dev->present) { |
1071 | ret = -ENODEV; | |
1072 | goto out; | |
1073 | } | |
1074 | if (gspca_dev->nframes == 0) { | |
1075 | ret = -EINVAL; | |
1076 | goto out; | |
1077 | } | |
1078 | if (!gspca_dev->streaming) { | |
1079 | ret = gspca_init_transfer(gspca_dev); | |
1080 | if (ret < 0) | |
1081 | goto out; | |
1082 | } | |
d646e701 | 1083 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
1084 | if (gspca_debug & D_STREAM) { |
1085 | PDEBUG_MODE("stream on OK", | |
1086 | gspca_dev->pixfmt, | |
1087 | gspca_dev->width, | |
1088 | gspca_dev->height); | |
1089 | } | |
1090 | #endif | |
e2997a72 | 1091 | ret = 0; |
63eb9546 JFM |
1092 | out: |
1093 | mutex_unlock(&gspca_dev->queue_lock); | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | static int vidioc_streamoff(struct file *file, void *priv, | |
1098 | enum v4l2_buf_type buf_type) | |
1099 | { | |
1100 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1101 | int i, ret; |
63eb9546 | 1102 | |
63eb9546 JFM |
1103 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1104 | return -EINVAL; | |
4aa0d037 JFM |
1105 | if (!gspca_dev->streaming) |
1106 | return 0; | |
1107 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1108 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1109 | |
1110 | /* stop streaming */ | |
4aa0d037 JFM |
1111 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1112 | ret = -ERESTARTSYS; | |
1113 | goto out; | |
63eb9546 | 1114 | } |
4aa0d037 | 1115 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1116 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1117 | |
1118 | /* empty the application queues */ | |
1119 | for (i = 0; i < gspca_dev->nframes; i++) | |
1120 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1121 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1122 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1123 | gspca_dev->sequence = 0; | |
1124 | atomic_set(&gspca_dev->nevent, 0); | |
1125 | ret = 0; | |
4aa0d037 JFM |
1126 | out: |
1127 | mutex_unlock(&gspca_dev->queue_lock); | |
1128 | return ret; | |
63eb9546 JFM |
1129 | } |
1130 | ||
1131 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1132 | struct v4l2_jpegcompression *jpegcomp) | |
1133 | { | |
1134 | struct gspca_dev *gspca_dev = priv; | |
1135 | int ret; | |
1136 | ||
1137 | if (!gspca_dev->sd_desc->get_jcomp) | |
1138 | return -EINVAL; | |
e2997a72 HG |
1139 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1140 | return -ERESTARTSYS; | |
63eb9546 JFM |
1141 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1142 | mutex_unlock(&gspca_dev->usb_lock); | |
1143 | return ret; | |
1144 | } | |
1145 | ||
1146 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1147 | struct v4l2_jpegcompression *jpegcomp) | |
1148 | { | |
1149 | struct gspca_dev *gspca_dev = priv; | |
1150 | int ret; | |
1151 | ||
e2997a72 HG |
1152 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1153 | return -ERESTARTSYS; | |
63eb9546 JFM |
1154 | if (!gspca_dev->sd_desc->set_jcomp) |
1155 | return -EINVAL; | |
1156 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1157 | mutex_unlock(&gspca_dev->usb_lock); | |
1158 | return ret; | |
1159 | } | |
1160 | ||
1161 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1162 | struct v4l2_streamparm *parm) | |
1163 | { | |
1164 | struct gspca_dev *gspca_dev = priv; | |
1165 | ||
6a7eba24 | 1166 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1167 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1168 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1173 | struct v4l2_streamparm *parm) | |
1174 | { | |
1175 | struct gspca_dev *gspca_dev = priv; | |
1176 | int n; | |
1177 | ||
63eb9546 JFM |
1178 | n = parm->parm.capture.readbuffers; |
1179 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1180 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1181 | else | |
1182 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1183 | return 0; |
1184 | } | |
1185 | ||
6a7eba24 JFM |
1186 | static int vidioc_s_std(struct file *filp, void *priv, |
1187 | v4l2_std_id *parm) | |
1188 | { | |
1189 | return 0; | |
1190 | } | |
1191 | ||
63eb9546 JFM |
1192 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1193 | static int vidiocgmbuf(struct file *file, void *priv, | |
1194 | struct video_mbuf *mbuf) | |
1195 | { | |
1196 | struct gspca_dev *gspca_dev = file->private_data; | |
1197 | int i; | |
1198 | ||
1199 | PDEBUG(D_STREAM, "cgmbuf"); | |
1200 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1201 | int ret; |
6a7eba24 JFM |
1202 | |
1203 | { | |
1204 | struct v4l2_format fmt; | |
1205 | ||
1206 | memset(&fmt, 0, sizeof fmt); | |
1207 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1208 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1209 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1210 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1211 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1212 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1213 | if (ret != 0) |
1214 | return ret; | |
1215 | } | |
1216 | { | |
1217 | struct v4l2_requestbuffers rb; | |
1218 | ||
1219 | memset(&rb, 0, sizeof rb); | |
1220 | rb.count = 4; | |
1221 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1222 | rb.memory = V4L2_MEMORY_MMAP; | |
1223 | ret = vidioc_reqbufs(file, priv, &rb); | |
1224 | if (ret != 0) | |
1225 | return ret; | |
1226 | } | |
63eb9546 JFM |
1227 | } |
1228 | mbuf->frames = gspca_dev->nframes; | |
1229 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1230 | for (i = 0; i < mbuf->frames; i++) | |
1231 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1232 | return 0; | |
1233 | } | |
1234 | #endif | |
1235 | ||
1236 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1237 | { | |
1238 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1239 | struct gspca_frame *frame; |
63eb9546 JFM |
1240 | struct page *page; |
1241 | unsigned long addr, start, size; | |
1242 | int i, ret; | |
63eb9546 JFM |
1243 | |
1244 | start = vma->vm_start; | |
1245 | size = vma->vm_end - vma->vm_start; | |
1246 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1247 | ||
e2997a72 HG |
1248 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1249 | return -ERESTARTSYS; | |
63eb9546 JFM |
1250 | if (!gspca_dev->present) { |
1251 | ret = -ENODEV; | |
4aa0d037 JFM |
1252 | goto out; |
1253 | } | |
1254 | if (gspca_dev->capt_file != file) { | |
1255 | ret = -EINVAL; | |
1256 | goto out; | |
63eb9546 JFM |
1257 | } |
1258 | ||
efab8211 | 1259 | frame = NULL; |
63eb9546 JFM |
1260 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1261 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1262 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1263 | break; | |
1264 | } | |
1265 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1266 | == vma->vm_pgoff) { | |
1267 | frame = &gspca_dev->frame[i]; | |
1268 | break; | |
1269 | } | |
1270 | } | |
efab8211 | 1271 | if (frame == NULL) { |
63eb9546 JFM |
1272 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1273 | ret = -EINVAL; | |
4aa0d037 | 1274 | goto out; |
63eb9546 JFM |
1275 | } |
1276 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1277 | /* v4l1 maps all the buffers */ |
1278 | if (i != 0 | |
1279 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1280 | #endif |
ac0d6df6 | 1281 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1282 | PDEBUG(D_STREAM, "mmap bad size"); |
1283 | ret = -EINVAL; | |
4aa0d037 | 1284 | goto out; |
63eb9546 JFM |
1285 | } |
1286 | ||
1287 | /* | |
1288 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1289 | * device. It also prevents the region from being core dumped. | |
1290 | */ | |
1291 | vma->vm_flags |= VM_IO; | |
1292 | ||
1293 | addr = (unsigned long) frame->data; | |
1294 | while (size > 0) { | |
1295 | page = vmalloc_to_page((void *) addr); | |
1296 | ret = vm_insert_page(vma, start, page); | |
1297 | if (ret < 0) | |
4aa0d037 | 1298 | goto out; |
63eb9546 JFM |
1299 | start += PAGE_SIZE; |
1300 | addr += PAGE_SIZE; | |
1301 | size -= PAGE_SIZE; | |
1302 | } | |
1303 | ||
1304 | vma->vm_ops = &gspca_vm_ops; | |
1305 | vma->vm_private_data = frame; | |
1306 | gspca_vm_open(vma); | |
e2997a72 | 1307 | ret = 0; |
4aa0d037 | 1308 | out: |
63eb9546 JFM |
1309 | mutex_unlock(&gspca_dev->queue_lock); |
1310 | return ret; | |
1311 | } | |
1312 | ||
63eb9546 JFM |
1313 | /* |
1314 | * wait for a video frame | |
1315 | * | |
1316 | * If a frame is ready, its index is returned. | |
1317 | */ | |
d43fa32f | 1318 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1319 | int nonblock_ing) |
1320 | { | |
1321 | struct gspca_frame *frame; | |
1322 | int i, j, ret; | |
1323 | ||
d43fa32f | 1324 | /* check if a frame is ready */ |
63eb9546 JFM |
1325 | i = gspca_dev->fr_o; |
1326 | j = gspca_dev->fr_queue[i]; | |
1327 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1328 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1329 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1330 | goto ok; |
82643d0e | 1331 | } |
63eb9546 JFM |
1332 | if (nonblock_ing) /* no frame yet */ |
1333 | return -EAGAIN; | |
1334 | ||
1335 | /* wait till a frame is ready */ | |
1336 | for (;;) { | |
4aa0d037 JFM |
1337 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1338 | atomic_read(&gspca_dev->nevent) > 0, | |
1339 | msecs_to_jiffies(3000)); | |
1340 | if (ret <= 0) { | |
1341 | if (ret < 0) | |
82643d0e JFM |
1342 | return ret; /* interrupt */ |
1343 | return -EIO; /* timeout */ | |
4aa0d037 | 1344 | } |
82643d0e | 1345 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1346 | if (!gspca_dev->streaming || !gspca_dev->present) |
1347 | return -EIO; | |
63eb9546 JFM |
1348 | i = gspca_dev->fr_o; |
1349 | j = gspca_dev->fr_queue[i]; | |
1350 | frame = &gspca_dev->frame[j]; | |
1351 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1352 | break; | |
1353 | } | |
63eb9546 | 1354 | ok: |
63eb9546 JFM |
1355 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1356 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1357 | gspca_dev->fr_q, | |
1358 | gspca_dev->fr_i, | |
1359 | gspca_dev->fr_o); | |
e2997a72 | 1360 | |
739570bb JFM |
1361 | if (gspca_dev->sd_desc->dq_callback) { |
1362 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1363 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1364 | mutex_unlock(&gspca_dev->usb_lock); |
1365 | } | |
63eb9546 JFM |
1366 | return j; |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * dequeue a video buffer | |
1371 | * | |
1372 | * If nonblock_ing is false, block until a buffer is available. | |
1373 | */ | |
1374 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1375 | struct v4l2_buffer *v4l2_buf) | |
1376 | { | |
1377 | struct gspca_dev *gspca_dev = priv; | |
1378 | struct gspca_frame *frame; | |
1379 | int i, ret; | |
1380 | ||
1381 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 JFM |
1382 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1383 | return -EINVAL; | |
1384 | if (v4l2_buf->memory != gspca_dev->memory) | |
63eb9546 | 1385 | return -EINVAL; |
5b77ae77 JFM |
1386 | |
1387 | /* if not streaming, be sure the application will not loop forever */ | |
1388 | if (!(file->f_flags & O_NONBLOCK) | |
1389 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1390 | return -EINVAL; |
1391 | ||
5b77ae77 JFM |
1392 | /* only the capturing file may dequeue */ |
1393 | if (gspca_dev->capt_file != file) | |
1394 | return -EINVAL; | |
1395 | ||
1396 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1397 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1398 | return -ERESTARTSYS; | |
1399 | ||
d43fa32f | 1400 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1401 | if (ret < 0) |
4aa0d037 | 1402 | goto out; |
63eb9546 JFM |
1403 | i = ret; /* frame index */ |
1404 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 JFM |
1405 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
1406 | if (copy_to_user((__u8 *) frame->v4l2_buf.m.userptr, | |
1407 | frame->data, | |
1408 | frame->v4l2_buf.bytesused)) { | |
1409 | PDEBUG(D_ERR|D_STREAM, | |
1410 | "dqbuf cp to user failed"); | |
1411 | ret = -EFAULT; | |
1412 | goto out; | |
1413 | } | |
1414 | } | |
63eb9546 JFM |
1415 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1416 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1417 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1418 | ret = 0; | |
4aa0d037 | 1419 | out: |
63eb9546 JFM |
1420 | mutex_unlock(&gspca_dev->read_lock); |
1421 | return ret; | |
1422 | } | |
1423 | ||
1424 | /* | |
1425 | * queue a video buffer | |
1426 | * | |
1427 | * Attempting to queue a buffer that has already been | |
1428 | * queued will return -EINVAL. | |
1429 | */ | |
1430 | static int vidioc_qbuf(struct file *file, void *priv, | |
1431 | struct v4l2_buffer *v4l2_buf) | |
1432 | { | |
1433 | struct gspca_dev *gspca_dev = priv; | |
1434 | struct gspca_frame *frame; | |
1435 | int i, index, ret; | |
1436 | ||
1437 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1438 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1439 | return -EINVAL; | |
1440 | ||
5b77ae77 JFM |
1441 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1442 | return -ERESTARTSYS; | |
1443 | ||
63eb9546 JFM |
1444 | index = v4l2_buf->index; |
1445 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1446 | PDEBUG(D_FRAM, |
63eb9546 | 1447 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1448 | ret = -EINVAL; |
1449 | goto out; | |
63eb9546 | 1450 | } |
5b77ae77 | 1451 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1452 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1453 | ret = -EINVAL; |
1454 | goto out; | |
63eb9546 | 1455 | } |
e2997a72 | 1456 | |
5b77ae77 | 1457 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1458 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1459 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1460 | ret = -EINVAL; |
1461 | goto out; | |
1462 | } | |
1463 | ||
1464 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
d43fa32f | 1465 | /* frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; */ |
63eb9546 | 1466 | |
d43fa32f | 1467 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1468 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1469 | frame->v4l2_buf.length = v4l2_buf->length; | |
1470 | } | |
1471 | ||
1472 | /* put the buffer in the 'queued' queue */ | |
1473 | i = gspca_dev->fr_q; | |
1474 | gspca_dev->fr_queue[i] = index; | |
1475 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1476 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1477 | gspca_dev->fr_q, | |
1478 | gspca_dev->fr_i, | |
1479 | gspca_dev->fr_o); | |
1480 | ||
1481 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1482 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1483 | ret = 0; | |
1484 | out: | |
1485 | mutex_unlock(&gspca_dev->queue_lock); | |
1486 | return ret; | |
1487 | } | |
1488 | ||
d43fa32f JFM |
1489 | /* |
1490 | * allocate the resources for read() | |
1491 | */ | |
1492 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1493 | struct file *file) | |
63eb9546 | 1494 | { |
63eb9546 | 1495 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1496 | int i, ret; |
63eb9546 | 1497 | |
d43fa32f | 1498 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1499 | if (gspca_dev->nframes == 0) { |
1500 | struct v4l2_requestbuffers rb; | |
1501 | ||
1502 | memset(&rb, 0, sizeof rb); | |
1503 | rb.count = gspca_dev->nbufread; | |
1504 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1505 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1506 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1507 | if (ret != 0) { | |
d43fa32f | 1508 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1509 | return ret; |
1510 | } | |
1511 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1512 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1513 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1514 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1515 | v4l2_buf.index = i; | |
63eb9546 JFM |
1516 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1517 | if (ret != 0) { | |
1518 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1519 | return ret; | |
1520 | } | |
1521 | } | |
d43fa32f JFM |
1522 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1523 | } | |
4aa0d037 | 1524 | |
d43fa32f JFM |
1525 | /* start streaming */ |
1526 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1527 | if (ret != 0) | |
1528 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1529 | return ret; | |
1530 | } | |
1531 | ||
1532 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1533 | { | |
1534 | struct gspca_dev *gspca_dev = file->private_data; | |
1535 | int i, ret; | |
1536 | ||
1537 | PDEBUG(D_FRAM, "poll"); | |
1538 | ||
1539 | poll_wait(file, &gspca_dev->wq, wait); | |
1540 | if (!gspca_dev->present) | |
1541 | return POLLERR; | |
1542 | ||
5b77ae77 JFM |
1543 | /* if reqbufs is not done, the user would use read() */ |
1544 | if (gspca_dev->nframes == 0) { | |
1545 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1546 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1547 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1548 | if (ret != 0) |
1549 | return POLLERR; | |
63eb9546 JFM |
1550 | } |
1551 | ||
d43fa32f JFM |
1552 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1553 | return POLLERR; | |
1554 | if (!gspca_dev->present) { | |
1555 | ret = POLLERR; | |
1556 | goto out; | |
1557 | } | |
1558 | ||
5b77ae77 | 1559 | /* check the next incoming buffer */ |
d43fa32f JFM |
1560 | i = gspca_dev->fr_o; |
1561 | i = gspca_dev->fr_queue[i]; | |
1562 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1563 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1564 | else | |
1565 | ret = 0; | |
1566 | out: | |
1567 | mutex_unlock(&gspca_dev->queue_lock); | |
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | static ssize_t dev_read(struct file *file, char __user *data, | |
1572 | size_t count, loff_t *ppos) | |
1573 | { | |
1574 | struct gspca_dev *gspca_dev = file->private_data; | |
1575 | struct gspca_frame *frame; | |
1576 | struct v4l2_buffer v4l2_buf; | |
1577 | struct timeval timestamp; | |
82643d0e | 1578 | int n, ret, ret2; |
d43fa32f | 1579 | |
a9e11134 | 1580 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1581 | if (!gspca_dev->present) |
1582 | return -ENODEV; | |
1583 | switch (gspca_dev->memory) { | |
1584 | case GSPCA_MEMORY_NO: /* first time */ | |
1585 | ret = read_alloc(gspca_dev, file); | |
1586 | if (ret != 0) | |
1587 | return ret; | |
1588 | break; | |
1589 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1590 | if (gspca_dev->capt_file == file) |
1591 | break; | |
1592 | /* fall thru */ | |
d43fa32f JFM |
1593 | default: |
1594 | return -EINVAL; | |
1595 | } | |
1596 | ||
63eb9546 JFM |
1597 | /* get a frame */ |
1598 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1599 | timestamp.tv_sec--; | |
82643d0e JFM |
1600 | n = 2; |
1601 | for (;;) { | |
63eb9546 JFM |
1602 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1603 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1604 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1605 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1606 | if (ret != 0) { | |
1607 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1608 | return ret; | |
1609 | } | |
1610 | ||
1611 | /* if the process slept for more than 1 second, | |
82643d0e | 1612 | * get anewer frame */ |
63eb9546 | 1613 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1614 | if (--n < 0) |
1615 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1616 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1617 | break; | |
1618 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1619 | if (ret != 0) { | |
1620 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1621 | return ret; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | /* copy the frame */ | |
ac0d6df6 JFM |
1626 | if (count > frame->v4l2_buf.bytesused) |
1627 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1628 | ret = copy_to_user(data, frame->data, count); |
1629 | if (ret != 0) { | |
1630 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1631 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1632 | ret = -EFAULT; |
1633 | goto out; | |
1634 | } | |
1635 | ret = count; | |
1636 | out: | |
1637 | /* in each case, requeue the buffer */ | |
1638 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1639 | if (ret2 != 0) | |
1640 | return ret2; | |
1641 | return ret; | |
1642 | } | |
1643 | ||
d43fa32f | 1644 | static void dev_release(struct video_device *vfd) |
63eb9546 JFM |
1645 | { |
1646 | /* nothing */ | |
1647 | } | |
1648 | ||
1649 | static struct file_operations dev_fops = { | |
1650 | .owner = THIS_MODULE, | |
1651 | .open = dev_open, | |
1652 | .release = dev_close, | |
1653 | .read = dev_read, | |
1654 | .mmap = dev_mmap, | |
1655 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1656 | #ifdef CONFIG_COMPAT |
1657 | .compat_ioctl = v4l_compat_ioctl32, | |
1658 | #endif | |
63eb9546 JFM |
1659 | .llseek = no_llseek, |
1660 | .poll = dev_poll, | |
1661 | }; | |
1662 | ||
a399810c | 1663 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1664 | .vidioc_querycap = vidioc_querycap, |
1665 | .vidioc_dqbuf = vidioc_dqbuf, | |
1666 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1667 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1668 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1669 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1670 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1671 | .vidioc_streamon = vidioc_streamon, |
1672 | .vidioc_queryctrl = vidioc_queryctrl, | |
1673 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1674 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1675 | .vidioc_querymenu = vidioc_querymenu, | |
1676 | .vidioc_enum_input = vidioc_enum_input, | |
1677 | .vidioc_g_input = vidioc_g_input, | |
1678 | .vidioc_s_input = vidioc_s_input, | |
1679 | .vidioc_reqbufs = vidioc_reqbufs, | |
1680 | .vidioc_querybuf = vidioc_querybuf, | |
1681 | .vidioc_streamoff = vidioc_streamoff, | |
1682 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1683 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1684 | .vidioc_g_parm = vidioc_g_parm, | |
1685 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1686 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1687 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1688 | .vidiocgmbuf = vidiocgmbuf, | |
1689 | #endif | |
1690 | }; | |
1691 | ||
a399810c HV |
1692 | static struct video_device gspca_template = { |
1693 | .name = "gspca main driver", | |
a399810c HV |
1694 | .fops = &dev_fops, |
1695 | .ioctl_ops = &dev_ioctl_ops, | |
1696 | .release = dev_release, /* mandatory */ | |
1697 | .minor = -1, | |
1698 | }; | |
1699 | ||
63eb9546 JFM |
1700 | /* |
1701 | * probe and create a new gspca device | |
1702 | * | |
1703 | * This function must be called by the sub-driver when it is | |
1704 | * called for probing a new device. | |
1705 | */ | |
1706 | int gspca_dev_probe(struct usb_interface *intf, | |
1707 | const struct usb_device_id *id, | |
1708 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1709 | int dev_size, |
1710 | struct module *module) | |
63eb9546 JFM |
1711 | { |
1712 | struct usb_interface_descriptor *interface; | |
1713 | struct gspca_dev *gspca_dev; | |
1714 | struct usb_device *dev = interface_to_usbdev(intf); | |
1715 | int ret; | |
63eb9546 | 1716 | |
6a7eba24 | 1717 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1718 | |
1719 | /* we don't handle multi-config cameras */ | |
1720 | if (dev->descriptor.bNumConfigurations != 1) | |
1721 | return -ENODEV; | |
1722 | interface = &intf->cur_altsetting->desc; | |
1723 | if (interface->bInterfaceNumber > 0) | |
1724 | return -ENODEV; | |
1725 | ||
1726 | /* create the device */ | |
1727 | if (dev_size < sizeof *gspca_dev) | |
1728 | dev_size = sizeof *gspca_dev; | |
1729 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
1730 | if (gspca_dev == NULL) { | |
1731 | err("couldn't kzalloc gspca struct"); | |
1732 | return -EIO; | |
1733 | } | |
1734 | gspca_dev->dev = dev; | |
1735 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1736 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 JFM |
1737 | gspca_dev->sd_desc = sd_desc; |
1738 | /* gspca_dev->users = 0; (done by kzalloc) */ | |
1739 | gspca_dev->nbufread = 2; | |
1740 | ||
1741 | /* configure the subdriver */ | |
1742 | ret = gspca_dev->sd_desc->config(gspca_dev, id); | |
1743 | if (ret < 0) | |
1744 | goto out; | |
1745 | ret = gspca_set_alt0(gspca_dev); | |
1746 | if (ret < 0) | |
1747 | goto out; | |
1748 | gspca_set_default_mode(gspca_dev); | |
1749 | ||
1750 | mutex_init(&gspca_dev->usb_lock); | |
1751 | mutex_init(&gspca_dev->read_lock); | |
1752 | mutex_init(&gspca_dev->queue_lock); | |
1753 | init_waitqueue_head(&gspca_dev->wq); | |
1754 | ||
1755 | /* init video stuff */ | |
1756 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
5e85e732 | 1757 | gspca_dev->vdev.parent = &dev->dev; |
d43fa32f JFM |
1758 | memcpy(&gspca_dev->fops, &dev_fops, sizeof gspca_dev->fops); |
1759 | gspca_dev->vdev.fops = &gspca_dev->fops; | |
1760 | gspca_dev->fops.owner = module; /* module protection */ | |
ee56a4d3 | 1761 | gspca_dev->present = 1; |
63eb9546 JFM |
1762 | ret = video_register_device(&gspca_dev->vdev, |
1763 | VFL_TYPE_GRABBER, | |
1764 | video_nr); | |
1765 | if (ret < 0) { | |
1766 | err("video_register_device err %d", ret); | |
1767 | goto out; | |
1768 | } | |
1769 | ||
63eb9546 JFM |
1770 | usb_set_intfdata(intf, gspca_dev); |
1771 | PDEBUG(D_PROBE, "probe ok"); | |
1772 | return 0; | |
1773 | out: | |
1774 | kfree(gspca_dev); | |
1775 | return ret; | |
1776 | } | |
1777 | EXPORT_SYMBOL(gspca_dev_probe); | |
1778 | ||
1779 | /* | |
1780 | * USB disconnection | |
1781 | * | |
1782 | * This function must be called by the sub-driver | |
1783 | * when the device disconnects, after the specific resources are freed. | |
1784 | */ | |
1785 | void gspca_disconnect(struct usb_interface *intf) | |
1786 | { | |
4aa0d037 | 1787 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 JFM |
1788 | |
1789 | if (!gspca_dev) | |
1790 | return; | |
1791 | gspca_dev->present = 0; | |
e2997a72 HG |
1792 | mutex_lock(&gspca_dev->queue_lock); |
1793 | mutex_lock(&gspca_dev->usb_lock); | |
1794 | gspca_dev->streaming = 0; | |
d43fa32f | 1795 | destroy_urbs(gspca_dev); |
63eb9546 | 1796 | mutex_unlock(&gspca_dev->usb_lock); |
e2997a72 | 1797 | mutex_unlock(&gspca_dev->queue_lock); |
63eb9546 JFM |
1798 | while (gspca_dev->users != 0) { /* wait until fully closed */ |
1799 | atomic_inc(&gspca_dev->nevent); | |
1800 | wake_up_interruptible(&gspca_dev->wq); /* wake processes */ | |
1801 | schedule(); | |
1802 | } | |
1803 | /* We don't want people trying to open up the device */ | |
1804 | video_unregister_device(&gspca_dev->vdev); | |
1805 | /* Free the memory */ | |
1806 | kfree(gspca_dev); | |
1807 | PDEBUG(D_PROBE, "disconnect complete"); | |
1808 | } | |
1809 | EXPORT_SYMBOL(gspca_disconnect); | |
1810 | ||
dcef3237 HG |
1811 | /* -- cam driver utility functions -- */ |
1812 | ||
1813 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1814 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1815 | ||
1816 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
1817 | where changed. */ | |
1818 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
1819 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
1820 | { | |
1821 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
1822 | const struct ctrl *gain_ctrl = NULL; | |
1823 | const struct ctrl *exposure_ctrl = NULL; | |
1824 | const struct ctrl *autogain_ctrl = NULL; | |
1825 | int retval = 0; | |
1826 | ||
1827 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
1828 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
1829 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1830 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
1831 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1832 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
1833 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1834 | } | |
1835 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
1836 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
1837 | "on cam without (auto)gain/exposure"); | |
1838 | return 0; | |
1839 | } | |
1840 | ||
1841 | if (gain_ctrl->get(gspca_dev, &gain) || | |
1842 | exposure_ctrl->get(gspca_dev, &exposure) || | |
1843 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
1844 | return 0; | |
1845 | ||
1846 | orig_gain = gain; | |
1847 | orig_exposure = exposure; | |
1848 | ||
1849 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
1850 | desired lumination fast (with the risc of a slight overshoot) */ | |
1851 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
1852 | ||
1853 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d\n", | |
1854 | avg_lum, desired_avg_lum, steps); | |
1855 | ||
1856 | for (i = 0; i < steps; i++) { | |
1857 | if (avg_lum > desired_avg_lum) { | |
1858 | if (gain > gain_knee) | |
1859 | gain--; | |
1860 | else if (exposure > exposure_knee) | |
1861 | exposure--; | |
1862 | else if (gain > gain_ctrl->qctrl.default_value) | |
1863 | gain--; | |
1864 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
1865 | exposure--; | |
1866 | else if (gain > gain_ctrl->qctrl.minimum) | |
1867 | gain--; | |
1868 | else | |
1869 | break; | |
1870 | } else { | |
1871 | if (gain < gain_ctrl->qctrl.default_value) | |
1872 | gain++; | |
1873 | else if (exposure < exposure_knee) | |
1874 | exposure++; | |
1875 | else if (gain < gain_knee) | |
1876 | gain++; | |
1877 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
1878 | exposure++; | |
1879 | else if (gain < gain_ctrl->qctrl.maximum) | |
1880 | gain++; | |
1881 | else | |
1882 | break; | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | if (gain != orig_gain) { | |
1887 | gain_ctrl->set(gspca_dev, gain); | |
1888 | retval = 1; | |
1889 | } | |
1890 | if (exposure != orig_exposure) { | |
1891 | exposure_ctrl->set(gspca_dev, exposure); | |
1892 | retval = 1; | |
1893 | } | |
1894 | ||
1895 | return retval; | |
1896 | } | |
1897 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
1898 | ||
63eb9546 JFM |
1899 | /* -- module insert / remove -- */ |
1900 | static int __init gspca_init(void) | |
1901 | { | |
bb64e86c JFM |
1902 | info("main v%d.%d.%d registered", |
1903 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
1904 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
1905 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
1906 | return 0; |
1907 | } | |
1908 | static void __exit gspca_exit(void) | |
1909 | { | |
1910 | info("main deregistered"); | |
1911 | } | |
1912 | ||
1913 | module_init(gspca_init); | |
1914 | module_exit(gspca_exit); | |
1915 | ||
d646e701 | 1916 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
1917 | module_param_named(debug, gspca_debug, int, 0644); |
1918 | MODULE_PARM_DESC(debug, | |
1919 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
1920 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
1921 | " 0x0100: v4l2"); | |
6a7eba24 | 1922 | #endif |