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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> | |
cf0fe08d | 24 | #include <linux/version.h> |
63eb9546 JFM |
25 | #include <linux/fs.h> |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/pagemap.h> | |
956e42d2 | 32 | #include <linux/io.h> |
63eb9546 | 33 | #include <asm/page.h> |
956e42d2 | 34 | #include <linux/uaccess.h> |
63eb9546 | 35 | #include <linux/jiffies.h> |
35ea11ff | 36 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
37 | |
38 | #include "gspca.h" | |
39 | ||
d43fa32f | 40 | /* global values */ |
ac0d6df6 | 41 | #define DEF_NURBS 2 /* default number of URBs */ |
d43fa32f | 42 | |
63eb9546 JFM |
43 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
44 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
45 | MODULE_LICENSE("GPL"); | |
46 | ||
240d3ad8 | 47 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 4, 0) |
63eb9546 JFM |
48 | |
49 | static int video_nr = -1; | |
50 | ||
335b3f88 | 51 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
52 | int gspca_debug = D_ERR | D_PROBE; |
53 | EXPORT_SYMBOL(gspca_debug); | |
54 | ||
55 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
56 | { | |
57 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
58 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
59 | txt, | |
60 | pixfmt & 0xff, | |
61 | (pixfmt >> 8) & 0xff, | |
62 | (pixfmt >> 16) & 0xff, | |
63 | pixfmt >> 24, | |
64 | w, h); | |
65 | } else { | |
66 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
67 | txt, | |
68 | pixfmt, | |
69 | w, h); | |
70 | } | |
71 | } | |
72 | #else | |
73 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
74 | #endif | |
75 | ||
d43fa32f JFM |
76 | /* specific memory types - !! should different from V4L2_MEMORY_xxx */ |
77 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ | |
78 | #define GSPCA_MEMORY_READ 7 | |
79 | ||
d43fa32f | 80 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 81 | |
63eb9546 JFM |
82 | /* |
83 | * VMA operations. | |
84 | */ | |
85 | static void gspca_vm_open(struct vm_area_struct *vma) | |
86 | { | |
87 | struct gspca_frame *frame = vma->vm_private_data; | |
88 | ||
89 | frame->vma_use_count++; | |
90 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
91 | } | |
92 | ||
93 | static void gspca_vm_close(struct vm_area_struct *vma) | |
94 | { | |
95 | struct gspca_frame *frame = vma->vm_private_data; | |
96 | ||
97 | if (--frame->vma_use_count <= 0) | |
98 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
99 | } | |
100 | ||
101 | static struct vm_operations_struct gspca_vm_ops = { | |
102 | .open = gspca_vm_open, | |
103 | .close = gspca_vm_close, | |
104 | }; | |
105 | ||
1b60e1ad JFM |
106 | /* get the current input frame buffer */ |
107 | struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev) | |
108 | { | |
109 | struct gspca_frame *frame; | |
110 | int i; | |
111 | ||
112 | i = gspca_dev->fr_i; | |
113 | i = gspca_dev->fr_queue[i]; | |
114 | frame = &gspca_dev->frame[i]; | |
115 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) | |
116 | != V4L2_BUF_FLAG_QUEUED) | |
117 | return NULL; | |
118 | return frame; | |
119 | } | |
120 | EXPORT_SYMBOL(gspca_get_i_frame); | |
121 | ||
63eb9546 | 122 | /* |
d43fa32f | 123 | * fill a video frame from an URB and resubmit |
63eb9546 | 124 | */ |
d43fa32f JFM |
125 | static void fill_frame(struct gspca_dev *gspca_dev, |
126 | struct urb *urb) | |
63eb9546 | 127 | { |
63eb9546 | 128 | struct gspca_frame *frame; |
6a7eba24 | 129 | __u8 *data; /* address of data in the iso message */ |
1b60e1ad | 130 | int i, len, st; |
63eb9546 JFM |
131 | cam_pkt_op pkt_scan; |
132 | ||
6a7eba24 | 133 | if (urb->status != 0) { |
62ee8eee | 134 | #ifdef CONFIG_PM |
6a709749 | 135 | if (!gspca_dev->frozen) |
62ee8eee | 136 | #endif |
6a709749 | 137 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
6a7eba24 JFM |
138 | return; /* disconnection ? */ |
139 | } | |
63eb9546 JFM |
140 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
141 | for (i = 0; i < urb->number_of_packets; i++) { | |
142 | ||
143 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
144 | frame = gspca_get_i_frame(gspca_dev); |
145 | if (!frame) { | |
63eb9546 JFM |
146 | gspca_dev->last_packet_type = DISCARD_PACKET; |
147 | break; | |
148 | } | |
149 | ||
150 | /* check the packet status and length */ | |
151 | len = urb->iso_frame_desc[i].actual_length; | |
ff374747 JFM |
152 | if (len == 0) { |
153 | if (gspca_dev->empty_packet == 0) | |
154 | gspca_dev->empty_packet = 1; | |
6a7eba24 | 155 | continue; |
ff374747 | 156 | } |
63eb9546 JFM |
157 | st = urb->iso_frame_desc[i].status; |
158 | if (st) { | |
6a7eba24 JFM |
159 | PDEBUG(D_ERR, |
160 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
161 | i, len, st); |
162 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
163 | continue; | |
164 | } | |
63eb9546 JFM |
165 | |
166 | /* let the packet be analyzed by the subdriver */ | |
167 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
168 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 169 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
170 | + urb->iso_frame_desc[i].offset; |
171 | pkt_scan(gspca_dev, frame, data, len); | |
172 | } | |
173 | ||
174 | /* resubmit the URB */ | |
63eb9546 JFM |
175 | st = usb_submit_urb(urb, GFP_ATOMIC); |
176 | if (st < 0) | |
177 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
178 | } | |
179 | ||
d43fa32f JFM |
180 | /* |
181 | * ISOC message interrupt from the USB device | |
182 | * | |
ac0d6df6 | 183 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 184 | */ |
ac0d6df6 | 185 | static void isoc_irq(struct urb *urb |
6a7eba24 | 186 | ) |
d43fa32f JFM |
187 | { |
188 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
189 | ||
3647fea8 | 190 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
191 | if (!gspca_dev->streaming) |
192 | return; | |
193 | fill_frame(gspca_dev, urb); | |
194 | } | |
195 | ||
0be01004 JFM |
196 | /* |
197 | * bulk message interrupt from the USB device | |
198 | */ | |
199 | static void bulk_irq(struct urb *urb | |
200 | ) | |
201 | { | |
202 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
203 | struct gspca_frame *frame; | |
dff369aa | 204 | int st; |
0be01004 JFM |
205 | |
206 | PDEBUG(D_PACK, "bulk irq"); | |
207 | if (!gspca_dev->streaming) | |
208 | return; | |
880ae24d JFM |
209 | switch (urb->status) { |
210 | case 0: | |
211 | break; | |
212 | case -ECONNRESET: | |
213 | urb->status = 0; | |
214 | break; | |
215 | default: | |
0be01004 JFM |
216 | #ifdef CONFIG_PM |
217 | if (!gspca_dev->frozen) | |
218 | #endif | |
219 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
220 | return; /* disconnection ? */ | |
221 | } | |
222 | ||
223 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
224 | frame = gspca_get_i_frame(gspca_dev); |
225 | if (!frame) { | |
0be01004 JFM |
226 | gspca_dev->last_packet_type = DISCARD_PACKET; |
227 | } else { | |
228 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); | |
229 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
230 | frame, | |
231 | urb->transfer_buffer, | |
232 | urb->actual_length); | |
233 | } | |
dff369aa AO |
234 | |
235 | /* resubmit the URB */ | |
236 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
237 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
238 | if (st < 0) | |
239 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
240 | } | |
0be01004 JFM |
241 | } |
242 | ||
63eb9546 JFM |
243 | /* |
244 | * add data to the current frame | |
245 | * | |
ac0d6df6 JFM |
246 | * This function is called by the subdrivers at interrupt level. |
247 | * | |
63eb9546 JFM |
248 | * To build a frame, these ones must add |
249 | * - one FIRST_PACKET | |
250 | * - 0 or many INTER_PACKETs | |
251 | * - one LAST_PACKET | |
252 | * DISCARD_PACKET invalidates the whole frame. | |
253 | * On LAST_PACKET, a new frame is returned. | |
254 | */ | |
255 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
e293e599 | 256 | enum gspca_packet_type packet_type, |
63eb9546 | 257 | struct gspca_frame *frame, |
a5ae2062 | 258 | const __u8 *data, |
63eb9546 JFM |
259 | int len) |
260 | { | |
261 | int i, j; | |
262 | ||
e2997a72 | 263 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
264 | |
265 | /* when start of a new frame, if the current frame buffer | |
266 | * is not queued, discard the whole frame */ | |
267 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
268 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
269 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
270 | gspca_dev->last_packet_type = DISCARD_PACKET; |
271 | return frame; | |
272 | } | |
273 | frame->data_end = frame->data; | |
274 | jiffies_to_timeval(get_jiffies_64(), | |
275 | &frame->v4l2_buf.timestamp); | |
276 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 277 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
278 | if (packet_type == LAST_PACKET) |
279 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 280 | return frame; |
d43fa32f | 281 | } |
63eb9546 | 282 | |
d43fa32f | 283 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
284 | if (len > 0) { |
285 | if (frame->data_end - frame->data + len | |
286 | > frame->v4l2_buf.length) { | |
a9e11134 | 287 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
288 | frame->data_end - frame->data + len, |
289 | frame->v4l2_buf.length); | |
290 | packet_type = DISCARD_PACKET; | |
291 | } else { | |
ac0d6df6 | 292 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
293 | frame->data_end += len; |
294 | } | |
295 | } | |
296 | gspca_dev->last_packet_type = packet_type; | |
297 | ||
219423c1 | 298 | /* if last packet, wake up the application and advance in the queue */ |
63eb9546 JFM |
299 | if (packet_type == LAST_PACKET) { |
300 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
301 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
302 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
303 | atomic_inc(&gspca_dev->nevent); | |
304 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
305 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
306 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
307 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
308 | frame->v4l2_buf.bytesused, | |
309 | gspca_dev->fr_q, | |
310 | i, | |
311 | gspca_dev->fr_o); | |
312 | j = gspca_dev->fr_queue[i]; | |
313 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
314 | } |
315 | return frame; | |
316 | } | |
317 | EXPORT_SYMBOL(gspca_frame_add); | |
318 | ||
319 | static int gspca_is_compressed(__u32 format) | |
320 | { | |
321 | switch (format) { | |
322 | case V4L2_PIX_FMT_MJPEG: | |
323 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 324 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 325 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
326 | return 1; |
327 | } | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static void *rvmalloc(unsigned long size) | |
332 | { | |
333 | void *mem; | |
334 | unsigned long adr; | |
335 | ||
63eb9546 | 336 | mem = vmalloc_32(size); |
efab8211 | 337 | if (mem != NULL) { |
63eb9546 JFM |
338 | adr = (unsigned long) mem; |
339 | while ((long) size > 0) { | |
340 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
341 | adr += PAGE_SIZE; | |
342 | size -= PAGE_SIZE; | |
343 | } | |
344 | } | |
345 | return mem; | |
346 | } | |
347 | ||
ac0d6df6 | 348 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
349 | { |
350 | unsigned long adr; | |
351 | ||
63eb9546 | 352 | adr = (unsigned long) mem; |
ac0d6df6 | 353 | while (size > 0) { |
63eb9546 JFM |
354 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
355 | adr += PAGE_SIZE; | |
356 | size -= PAGE_SIZE; | |
357 | } | |
358 | vfree(mem); | |
359 | } | |
360 | ||
361 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 362 | unsigned int count) |
63eb9546 | 363 | { |
d43fa32f JFM |
364 | struct gspca_frame *frame; |
365 | unsigned int frsz; | |
366 | int i; | |
63eb9546 | 367 | |
c2446b3e JFM |
368 | i = gspca_dev->curr_mode; |
369 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 370 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 371 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 372 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
373 | if (count > GSPCA_MAX_FRAMES) |
374 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
375 | gspca_dev->frbuf = rvmalloc(frsz * count); |
376 | if (!gspca_dev->frbuf) { | |
377 | err("frame alloc failed"); | |
378 | return -ENOMEM; | |
63eb9546 JFM |
379 | } |
380 | gspca_dev->nframes = count; | |
381 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
382 | frame = &gspca_dev->frame[i]; |
383 | frame->v4l2_buf.index = i; | |
384 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
385 | frame->v4l2_buf.flags = 0; | |
386 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
387 | frame->v4l2_buf.length = frsz; | |
388 | frame->v4l2_buf.memory = gspca_dev->memory; | |
389 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 390 | frame->data = frame->data_end = |
d43fa32f | 391 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 392 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
393 | } |
394 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
395 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
396 | gspca_dev->sequence = 0; | |
397 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 398 | return 0; |
63eb9546 JFM |
399 | } |
400 | ||
401 | static void frame_free(struct gspca_dev *gspca_dev) | |
402 | { | |
403 | int i; | |
404 | ||
405 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 406 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
407 | rvfree(gspca_dev->frbuf, |
408 | gspca_dev->nframes * gspca_dev->frsz); | |
409 | gspca_dev->frbuf = NULL; | |
410 | for (i = 0; i < gspca_dev->nframes; i++) | |
411 | gspca_dev->frame[i].data = NULL; | |
412 | } | |
413 | gspca_dev->nframes = 0; | |
414 | } | |
415 | ||
d43fa32f | 416 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
417 | { |
418 | struct urb *urb; | |
419 | unsigned int i; | |
420 | ||
421 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 422 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 423 | urb = gspca_dev->urb[i]; |
63eb9546 | 424 | if (urb == NULL) |
d43fa32f | 425 | break; |
63eb9546 | 426 | |
4aa0d037 | 427 | gspca_dev->urb[i] = NULL; |
63eb9546 | 428 | usb_kill_urb(urb); |
efab8211 | 429 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
430 | usb_buffer_free(gspca_dev->dev, |
431 | urb->transfer_buffer_length, | |
4aa0d037 | 432 | urb->transfer_buffer, |
63eb9546 | 433 | urb->transfer_dma); |
63eb9546 JFM |
434 | usb_free_urb(urb); |
435 | } | |
63eb9546 JFM |
436 | } |
437 | ||
438 | /* | |
219423c1 | 439 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 440 | */ |
0be01004 JFM |
441 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
442 | __u8 epaddr, | |
443 | __u8 xfer) | |
63eb9546 JFM |
444 | { |
445 | struct usb_host_endpoint *ep; | |
446 | int i, attr; | |
447 | ||
448 | epaddr |= USB_DIR_IN; | |
449 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
450 | ep = &alt->endpoint[i]; | |
451 | if (ep->desc.bEndpointAddress == epaddr) { | |
452 | attr = ep->desc.bmAttributes | |
453 | & USB_ENDPOINT_XFERTYPE_MASK; | |
0be01004 | 454 | if (attr == xfer) |
63eb9546 JFM |
455 | return ep; |
456 | break; | |
457 | } | |
458 | } | |
459 | return NULL; | |
460 | } | |
461 | ||
462 | /* | |
219423c1 | 463 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
464 | * |
465 | * The endpoint is defined by the subdriver. | |
466 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
467 | * This routine may be called many times when the bandwidth is too small | |
468 | * (the bandwidth is checked on urb submit). | |
469 | */ | |
0be01004 | 470 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
471 | { |
472 | struct usb_interface *intf; | |
473 | struct usb_host_endpoint *ep; | |
474 | int i, ret; | |
475 | ||
476 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 477 | ep = NULL; |
63eb9546 | 478 | i = gspca_dev->alt; /* previous alt setting */ |
95d9142c JFM |
479 | |
480 | /* try isoc */ | |
63eb9546 | 481 | while (--i > 0) { /* alt 0 is unusable */ |
0be01004 JFM |
482 | ep = alt_xfer(&intf->altsetting[i], |
483 | gspca_dev->cam.epaddr, | |
95d9142c | 484 | USB_ENDPOINT_XFER_ISOC); |
63eb9546 JFM |
485 | if (ep) |
486 | break; | |
487 | } | |
95d9142c JFM |
488 | |
489 | /* if no isoc, try bulk */ | |
6a7eba24 | 490 | if (ep == NULL) { |
95d9142c JFM |
491 | ep = alt_xfer(&intf->altsetting[0], |
492 | gspca_dev->cam.epaddr, | |
493 | USB_ENDPOINT_XFER_BULK); | |
494 | if (ep == NULL) { | |
495 | err("no transfer endpoint found"); | |
496 | return NULL; | |
497 | } | |
63eb9546 | 498 | } |
0be01004 | 499 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 500 | i, ep->desc.bEndpointAddress); |
95d9142c JFM |
501 | if (i > 0) { |
502 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
503 | if (ret < 0) { | |
504 | err("set interface err %d", ret); | |
505 | return NULL; | |
506 | } | |
63eb9546 | 507 | } |
d43fa32f | 508 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
509 | return ep; |
510 | } | |
511 | ||
512 | /* | |
0be01004 | 513 | * create the URBs for image transfer |
63eb9546 JFM |
514 | */ |
515 | static int create_urbs(struct gspca_dev *gspca_dev, | |
516 | struct usb_host_endpoint *ep) | |
517 | { | |
518 | struct urb *urb; | |
d43fa32f | 519 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
520 | |
521 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 522 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 523 | |
95d9142c JFM |
524 | if (gspca_dev->alt != 0) { /* isoc */ |
525 | ||
526 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
527 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
0be01004 JFM |
528 | npkt = ISO_MAX_SIZE / psize; |
529 | if (npkt > ISO_MAX_PKT) | |
530 | npkt = ISO_MAX_PKT; | |
531 | bsize = psize * npkt; | |
532 | PDEBUG(D_STREAM, | |
533 | "isoc %d pkts size %d = bsize:%d", | |
534 | npkt, psize, bsize); | |
51977a8d | 535 | nurbs = DEF_NURBS; |
95d9142c | 536 | } else { /* bulk */ |
0be01004 | 537 | npkt = 0; |
dff369aa | 538 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
539 | if (bsize == 0) |
540 | bsize = psize; | |
0be01004 | 541 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
542 | if (gspca_dev->cam.bulk_nurbs != 0) |
543 | nurbs = gspca_dev->cam.bulk_nurbs; | |
544 | else | |
545 | nurbs = 1; | |
0be01004 JFM |
546 | } |
547 | ||
6a7eba24 | 548 | gspca_dev->nurbs = nurbs; |
d43fa32f | 549 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
550 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
551 | if (!urb) { | |
552 | err("usb_alloc_urb failed"); | |
0d0548e6 | 553 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
554 | return -ENOMEM; |
555 | } | |
4aa0d037 | 556 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
557 | bsize, |
558 | GFP_KERNEL, | |
559 | &urb->transfer_dma); | |
560 | ||
4aa0d037 | 561 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 562 | usb_free_urb(urb); |
63eb9546 | 563 | err("usb_buffer_urb failed"); |
0d0548e6 | 564 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
565 | return -ENOMEM; |
566 | } | |
4aa0d037 | 567 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
568 | urb->dev = gspca_dev->dev; |
569 | urb->context = gspca_dev; | |
63eb9546 | 570 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
571 | if (npkt != 0) { /* ISOC */ |
572 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
573 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
574 | urb->transfer_flags = URB_ISO_ASAP |
575 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
576 | urb->interval = ep->desc.bInterval; |
577 | urb->complete = isoc_irq; | |
578 | urb->number_of_packets = npkt; | |
579 | for (i = 0; i < npkt; i++) { | |
580 | urb->iso_frame_desc[i].length = psize; | |
581 | urb->iso_frame_desc[i].offset = psize * i; | |
582 | } | |
583 | } else { /* bulk */ | |
584 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
585 | ep->desc.bEndpointAddress), | |
6c49da7f | 586 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 587 | urb->complete = bulk_irq; |
63eb9546 JFM |
588 | } |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
593 | /* | |
594 | * start the USB transfer | |
595 | */ | |
596 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
597 | { | |
63eb9546 JFM |
598 | struct usb_host_endpoint *ep; |
599 | int n, ret; | |
600 | ||
e2997a72 HG |
601 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
602 | return -ERESTARTSYS; | |
63eb9546 | 603 | |
d43fa32f JFM |
604 | /* set the higher alternate setting and |
605 | * loop until urb submit succeeds */ | |
606 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 607 | for (;;) { |
d43fa32f | 608 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
0be01004 | 609 | ep = get_ep(gspca_dev); |
63eb9546 JFM |
610 | if (ep == NULL) { |
611 | ret = -EIO; | |
612 | goto out; | |
613 | } | |
614 | ret = create_urbs(gspca_dev, ep); | |
615 | if (ret < 0) | |
616 | goto out; | |
617 | ||
8fe2f1d5 JFM |
618 | /* clear the bulk endpoint */ |
619 | if (gspca_dev->alt == 0) /* if bulk transfer */ | |
620 | usb_clear_halt(gspca_dev->dev, | |
621 | usb_rcvintpipe(gspca_dev->dev, | |
622 | gspca_dev->cam.epaddr)); | |
623 | ||
63eb9546 | 624 | /* start the cam */ |
72ab97ce JFM |
625 | ret = gspca_dev->sd_desc->start(gspca_dev); |
626 | if (ret < 0) { | |
627 | destroy_urbs(gspca_dev); | |
628 | goto out; | |
629 | } | |
63eb9546 JFM |
630 | gspca_dev->streaming = 1; |
631 | atomic_set(&gspca_dev->nevent, 0); | |
632 | ||
dff369aa AO |
633 | /* some bulk transfers are started by the subdriver */ |
634 | if (gspca_dev->alt == 0 && gspca_dev->cam.bulk_nurbs == 0) | |
51977a8d JFM |
635 | break; |
636 | ||
63eb9546 | 637 | /* submit the URBs */ |
d43fa32f | 638 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 639 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
640 | if (ret < 0) { |
641 | PDEBUG(D_ERR|D_STREAM, | |
642 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 643 | gspca_dev->streaming = 0; |
d43fa32f | 644 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
645 | if (ret == -ENOSPC) |
646 | break; /* try the previous alt */ | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | if (ret >= 0) | |
651 | break; | |
652 | } | |
653 | out: | |
654 | mutex_unlock(&gspca_dev->usb_lock); | |
655 | return ret; | |
656 | } | |
657 | ||
658 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
659 | { | |
660 | int ret; | |
661 | ||
662 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
663 | if (ret < 0) | |
664 | PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret); | |
665 | return ret; | |
666 | } | |
667 | ||
219423c1 | 668 | /* Note: both the queue and the usb locks should be held when calling this */ |
63eb9546 JFM |
669 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
670 | { | |
63eb9546 | 671 | gspca_dev->streaming = 0; |
d43fa32f | 672 | atomic_set(&gspca_dev->nevent, 0); |
98522a7b JFM |
673 | if (gspca_dev->present |
674 | && gspca_dev->sd_desc->stopN) | |
675 | gspca_dev->sd_desc->stopN(gspca_dev); | |
676 | destroy_urbs(gspca_dev); | |
677 | gspca_set_alt0(gspca_dev); | |
678 | if (gspca_dev->sd_desc->stop0) | |
679 | gspca_dev->sd_desc->stop0(gspca_dev); | |
680 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 JFM |
681 | } |
682 | ||
d43fa32f | 683 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
684 | { |
685 | int i; | |
686 | ||
687 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
688 | gspca_dev->curr_mode = i; | |
689 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
690 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 691 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
692 | } |
693 | ||
694 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
695 | int width, int height) | |
696 | { | |
697 | int i; | |
698 | ||
d43fa32f JFM |
699 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
700 | if (width >= gspca_dev->cam.cam_mode[i].width | |
701 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
702 | break; |
703 | } | |
63eb9546 JFM |
704 | return i; |
705 | } | |
706 | ||
63eb9546 JFM |
707 | /* |
708 | * search a mode with the right pixel format | |
709 | */ | |
710 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
711 | int mode, | |
712 | int pixfmt) | |
713 | { | |
714 | int modeU, modeD; | |
715 | ||
716 | modeU = modeD = mode; | |
717 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
718 | if (--modeD >= 0) { | |
c2446b3e JFM |
719 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
720 | == pixfmt) | |
63eb9546 JFM |
721 | return modeD; |
722 | } | |
723 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
724 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
725 | == pixfmt) | |
63eb9546 JFM |
726 | return modeU; |
727 | } | |
728 | } | |
729 | return -EINVAL; | |
730 | } | |
731 | ||
e078770a | 732 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
733 | struct v4l2_fmtdesc *fmtdesc) |
734 | { | |
735 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 736 | int i, j, index; |
63eb9546 JFM |
737 | __u32 fmt_tb[8]; |
738 | ||
63eb9546 JFM |
739 | /* give an index to each format */ |
740 | index = 0; | |
741 | j = 0; | |
742 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 743 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
744 | j = 0; |
745 | for (;;) { | |
746 | if (fmt_tb[j] == fmt_tb[index]) | |
747 | break; | |
748 | j++; | |
749 | } | |
750 | if (j == index) { | |
751 | if (fmtdesc->index == index) | |
752 | break; /* new format */ | |
753 | index++; | |
80297125 | 754 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
755 | return -EINVAL; |
756 | } | |
757 | } | |
758 | if (i < 0) | |
759 | return -EINVAL; /* no more format */ | |
760 | ||
63eb9546 JFM |
761 | fmtdesc->pixelformat = fmt_tb[index]; |
762 | if (gspca_is_compressed(fmt_tb[index])) | |
763 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 764 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
765 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
766 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
767 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
768 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
769 | fmtdesc->description[4] = '\0'; | |
770 | return 0; | |
771 | } | |
772 | ||
e078770a | 773 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
774 | struct v4l2_format *fmt) |
775 | { | |
776 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 777 | int mode; |
63eb9546 | 778 | |
6a7eba24 JFM |
779 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
780 | return -EINVAL; | |
c2446b3e JFM |
781 | mode = gspca_dev->curr_mode; |
782 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
783 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
784 | return 0; |
785 | } | |
786 | ||
e078770a | 787 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
788 | struct v4l2_format *fmt) |
789 | { | |
24c530b4 | 790 | int w, h, mode, mode2; |
63eb9546 | 791 | |
6a7eba24 JFM |
792 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
793 | return -EINVAL; | |
4aa0d037 JFM |
794 | w = fmt->fmt.pix.width; |
795 | h = fmt->fmt.pix.height; | |
d43fa32f | 796 | |
335b3f88 | 797 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
798 | if (gspca_debug & D_CONF) |
799 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
800 | #endif | |
801 | /* search the closest mode for width and height */ | |
802 | mode = wxh_to_mode(gspca_dev, w, h); | |
803 | ||
804 | /* OK if right palette */ | |
c2446b3e JFM |
805 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
806 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
807 | |
808 | /* else, search the closest mode with the same pixel format */ | |
809 | mode2 = gspca_get_mode(gspca_dev, mode, | |
810 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 811 | if (mode2 >= 0) |
63eb9546 | 812 | mode = mode2; |
c2446b3e JFM |
813 | /* else |
814 | ; * no chance, return this mode */ | |
63eb9546 | 815 | } |
c2446b3e JFM |
816 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
817 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
818 | return mode; /* used when s_fmt */ |
819 | } | |
820 | ||
e078770a | 821 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
822 | void *priv, |
823 | struct v4l2_format *fmt) | |
824 | { | |
4aa0d037 | 825 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
826 | int ret; |
827 | ||
e078770a | 828 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
829 | if (ret < 0) |
830 | return ret; | |
831 | return 0; | |
832 | } | |
833 | ||
e078770a | 834 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
835 | struct v4l2_format *fmt) |
836 | { | |
837 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 838 | int ret; |
63eb9546 | 839 | |
e2997a72 HG |
840 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
841 | return -ERESTARTSYS; | |
d43fa32f | 842 | |
e078770a | 843 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
844 | if (ret < 0) |
845 | goto out; | |
846 | ||
d43fa32f JFM |
847 | if (gspca_dev->nframes != 0 |
848 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
849 | ret = -EINVAL; | |
850 | goto out; | |
851 | } | |
852 | ||
50a871fe JFM |
853 | if (ret == gspca_dev->curr_mode) { |
854 | ret = 0; | |
63eb9546 | 855 | goto out; /* same mode */ |
50a871fe | 856 | } |
d43fa32f JFM |
857 | |
858 | if (gspca_dev->streaming) { | |
859 | ret = -EBUSY; | |
860 | goto out; | |
e2997a72 | 861 | } |
4aa0d037 JFM |
862 | gspca_dev->width = fmt->fmt.pix.width; |
863 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
864 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
865 | gspca_dev->curr_mode = ret; | |
d43fa32f | 866 | |
d43fa32f | 867 | ret = 0; |
63eb9546 JFM |
868 | out: |
869 | mutex_unlock(&gspca_dev->queue_lock); | |
870 | return ret; | |
871 | } | |
872 | ||
d0182306 | 873 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 874 | { |
d0182306 | 875 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 876 | |
d0182306 | 877 | PDEBUG(D_STREAM, "device released"); |
6b060ffe FZ |
878 | |
879 | kfree(gspca_dev->usb_buf); | |
880 | kfree(gspca_dev); | |
881 | } | |
882 | ||
63eb9546 JFM |
883 | static int dev_open(struct inode *inode, struct file *file) |
884 | { | |
885 | struct gspca_dev *gspca_dev; | |
886 | int ret; | |
887 | ||
d43fa32f | 888 | PDEBUG(D_STREAM, "%s open", current->comm); |
a12ca6a6 | 889 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
890 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
891 | return -ERESTARTSYS; | |
63eb9546 JFM |
892 | if (!gspca_dev->present) { |
893 | ret = -ENODEV; | |
894 | goto out; | |
895 | } | |
896 | ||
012d6b02 | 897 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
898 | ret = -EBUSY; |
899 | goto out; | |
900 | } | |
5c4fa002 JFM |
901 | |
902 | /* protect the subdriver against rmmod */ | |
903 | if (!try_module_get(gspca_dev->module)) { | |
904 | ret = -ENODEV; | |
905 | goto out; | |
906 | } | |
907 | ||
63eb9546 | 908 | gspca_dev->users++; |
6b060ffe | 909 | |
63eb9546 | 910 | file->private_data = gspca_dev; |
335b3f88 | 911 | #ifdef GSPCA_DEBUG |
63eb9546 | 912 | /* activate the v4l2 debug */ |
d43fa32f | 913 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 914 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 915 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 916 | else |
a12ca6a6 | 917 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 918 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 919 | #endif |
012d6b02 | 920 | ret = 0; |
63eb9546 JFM |
921 | out: |
922 | mutex_unlock(&gspca_dev->queue_lock); | |
923 | if (ret != 0) | |
924 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
925 | else | |
d43fa32f | 926 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
927 | return ret; |
928 | } | |
929 | ||
930 | static int dev_close(struct inode *inode, struct file *file) | |
931 | { | |
932 | struct gspca_dev *gspca_dev = file->private_data; | |
933 | ||
d43fa32f | 934 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
935 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
936 | return -ERESTARTSYS; | |
937 | gspca_dev->users--; | |
e2997a72 | 938 | |
5b77ae77 | 939 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 940 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
941 | if (gspca_dev->streaming) { |
942 | mutex_lock(&gspca_dev->usb_lock); | |
943 | gspca_stream_off(gspca_dev); | |
944 | mutex_unlock(&gspca_dev->usb_lock); | |
945 | } | |
4aa0d037 | 946 | frame_free(gspca_dev); |
efab8211 | 947 | gspca_dev->capt_file = NULL; |
d43fa32f | 948 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 949 | } |
d43fa32f | 950 | file->private_data = NULL; |
5c4fa002 | 951 | module_put(gspca_dev->module); |
63eb9546 | 952 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 953 | |
d43fa32f | 954 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 955 | |
63eb9546 JFM |
956 | return 0; |
957 | } | |
958 | ||
959 | static int vidioc_querycap(struct file *file, void *priv, | |
960 | struct v4l2_capability *cap) | |
961 | { | |
962 | struct gspca_dev *gspca_dev = priv; | |
963 | ||
63eb9546 JFM |
964 | memset(cap, 0, sizeof *cap); |
965 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
c6edaf16 JFM |
966 | if (gspca_dev->dev->product != NULL) { |
967 | strncpy(cap->card, gspca_dev->dev->product, | |
968 | sizeof cap->card); | |
969 | } else { | |
970 | snprintf(cap->card, sizeof cap->card, | |
971 | "USB Camera (%04x:%04x)", | |
972 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
973 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
974 | } | |
63eb9546 JFM |
975 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, |
976 | sizeof cap->bus_info); | |
977 | cap->version = DRIVER_VERSION_NUMBER; | |
978 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
979 | | V4L2_CAP_STREAMING | |
980 | | V4L2_CAP_READWRITE; | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static int vidioc_queryctrl(struct file *file, void *priv, | |
985 | struct v4l2_queryctrl *q_ctrl) | |
986 | { | |
987 | struct gspca_dev *gspca_dev = priv; | |
f50ba1be | 988 | int i, ix; |
6a7eba24 JFM |
989 | u32 id; |
990 | ||
f50ba1be | 991 | ix = -1; |
6a7eba24 JFM |
992 | id = q_ctrl->id; |
993 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
994 | id &= V4L2_CTRL_ID_MASK; | |
995 | id++; | |
996 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
0f523c2f | 997 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be JFM |
998 | continue; |
999 | if (ix < 0) { | |
1000 | ix = i; | |
1001 | continue; | |
6a7eba24 | 1002 | } |
f50ba1be JFM |
1003 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id |
1004 | > gspca_dev->sd_desc->ctrls[ix].qctrl.id) | |
1005 | continue; | |
1006 | ix = i; | |
6a7eba24 | 1007 | } |
6a7eba24 | 1008 | } |
63eb9546 | 1009 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 1010 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
f50ba1be JFM |
1011 | ix = i; |
1012 | break; | |
63eb9546 JFM |
1013 | } |
1014 | } | |
f50ba1be JFM |
1015 | if (ix < 0) |
1016 | return -EINVAL; | |
1017 | memcpy(q_ctrl, &gspca_dev->sd_desc->ctrls[ix].qctrl, | |
1018 | sizeof *q_ctrl); | |
1019 | if (gspca_dev->ctrl_dis & (1 << ix)) | |
1020 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; | |
1021 | return 0; | |
63eb9546 JFM |
1022 | } |
1023 | ||
1024 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1025 | struct v4l2_control *ctrl) | |
1026 | { | |
1027 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1028 | const struct ctrl *ctrls; |
63eb9546 JFM |
1029 | int i, ret; |
1030 | ||
63eb9546 JFM |
1031 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
1032 | i < gspca_dev->sd_desc->nctrls; | |
1033 | i++, ctrls++) { | |
1034 | if (ctrl->id != ctrls->qctrl.id) | |
1035 | continue; | |
0f523c2f HG |
1036 | if (gspca_dev->ctrl_dis & (1 << i)) |
1037 | return -EINVAL; | |
63eb9546 | 1038 | if (ctrl->value < ctrls->qctrl.minimum |
fcf5cb24 | 1039 | || ctrl->value > ctrls->qctrl.maximum) |
63eb9546 JFM |
1040 | return -ERANGE; |
1041 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
1042 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1043 | return -ERESTARTSYS; | |
63eb9546 JFM |
1044 | ret = ctrls->set(gspca_dev, ctrl->value); |
1045 | mutex_unlock(&gspca_dev->usb_lock); | |
1046 | return ret; | |
1047 | } | |
1048 | return -EINVAL; | |
1049 | } | |
1050 | ||
1051 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1052 | struct v4l2_control *ctrl) | |
1053 | { | |
1054 | struct gspca_dev *gspca_dev = priv; | |
1055 | ||
a5ae2062 | 1056 | const struct ctrl *ctrls; |
63eb9546 JFM |
1057 | int i, ret; |
1058 | ||
1059 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1060 | i < gspca_dev->sd_desc->nctrls; | |
1061 | i++, ctrls++) { | |
1062 | if (ctrl->id != ctrls->qctrl.id) | |
1063 | continue; | |
0f523c2f HG |
1064 | if (gspca_dev->ctrl_dis & (1 << i)) |
1065 | return -EINVAL; | |
e2997a72 HG |
1066 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1067 | return -ERESTARTSYS; | |
63eb9546 JFM |
1068 | ret = ctrls->get(gspca_dev, &ctrl->value); |
1069 | mutex_unlock(&gspca_dev->usb_lock); | |
1070 | return ret; | |
1071 | } | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | ||
1075 | static int vidioc_querymenu(struct file *file, void *priv, | |
1076 | struct v4l2_querymenu *qmenu) | |
1077 | { | |
1078 | struct gspca_dev *gspca_dev = priv; | |
1079 | ||
1080 | if (!gspca_dev->sd_desc->querymenu) | |
1081 | return -EINVAL; | |
1082 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1083 | } | |
1084 | ||
1085 | static int vidioc_enum_input(struct file *file, void *priv, | |
1086 | struct v4l2_input *input) | |
1087 | { | |
1088 | struct gspca_dev *gspca_dev = priv; | |
1089 | ||
1090 | if (input->index != 0) | |
1091 | return -EINVAL; | |
1092 | memset(input, 0, sizeof *input); | |
1093 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1094 | strncpy(input->name, gspca_dev->sd_desc->name, | |
1095 | sizeof input->name); | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1100 | { | |
1101 | *i = 0; | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1106 | { | |
1107 | if (i > 0) | |
1108 | return -EINVAL; | |
1109 | return (0); | |
1110 | } | |
1111 | ||
1112 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1113 | struct v4l2_requestbuffers *rb) | |
1114 | { | |
1115 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1116 | int i, ret = 0; |
63eb9546 | 1117 | |
63eb9546 JFM |
1118 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1119 | return -EINVAL; | |
d43fa32f | 1120 | switch (rb->memory) { |
5b77ae77 | 1121 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1122 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1123 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1124 | break; |
d43fa32f | 1125 | default: |
63eb9546 | 1126 | return -EINVAL; |
d43fa32f | 1127 | } |
e2997a72 HG |
1128 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1129 | return -ERESTARTSYS; | |
d43fa32f | 1130 | |
5b77ae77 JFM |
1131 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1132 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1133 | ret = -EBUSY; |
1134 | goto out; | |
1135 | } | |
d43fa32f | 1136 | |
5b77ae77 JFM |
1137 | /* only one file may do the capture */ |
1138 | if (gspca_dev->capt_file != NULL | |
1139 | && gspca_dev->capt_file != file) { | |
1140 | ret = -EBUSY; | |
1141 | goto out; | |
1142 | } | |
1143 | ||
1144 | /* if allocated, the buffers must not be mapped */ | |
1145 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1146 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1147 | ret = -EBUSY; |
1148 | goto out; | |
1149 | } | |
5b77ae77 JFM |
1150 | } |
1151 | ||
1152 | /* stop streaming */ | |
1153 | if (gspca_dev->streaming) { | |
1154 | mutex_lock(&gspca_dev->usb_lock); | |
1155 | gspca_stream_off(gspca_dev); | |
1156 | mutex_unlock(&gspca_dev->usb_lock); | |
1157 | } | |
1158 | ||
1159 | /* free the previous allocated buffers, if any */ | |
1160 | if (gspca_dev->nframes != 0) { | |
1161 | frame_free(gspca_dev); | |
1162 | gspca_dev->capt_file = NULL; | |
1163 | } | |
1164 | if (rb->count == 0) /* unrequest */ | |
1165 | goto out; | |
1166 | gspca_dev->memory = rb->memory; | |
1167 | ret = frame_alloc(gspca_dev, rb->count); | |
1168 | if (ret == 0) { | |
1169 | rb->count = gspca_dev->nframes; | |
1170 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1171 | } |
1172 | out: | |
63eb9546 JFM |
1173 | mutex_unlock(&gspca_dev->queue_lock); |
1174 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1175 | return ret; | |
1176 | } | |
1177 | ||
1178 | static int vidioc_querybuf(struct file *file, void *priv, | |
1179 | struct v4l2_buffer *v4l2_buf) | |
1180 | { | |
1181 | struct gspca_dev *gspca_dev = priv; | |
1182 | struct gspca_frame *frame; | |
1183 | ||
63eb9546 JFM |
1184 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1185 | || v4l2_buf->index < 0 | |
1186 | || v4l2_buf->index >= gspca_dev->nframes) | |
1187 | return -EINVAL; | |
1188 | ||
1189 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1190 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | static int vidioc_streamon(struct file *file, void *priv, | |
1195 | enum v4l2_buf_type buf_type) | |
1196 | { | |
1197 | struct gspca_dev *gspca_dev = priv; | |
1198 | int ret; | |
1199 | ||
63eb9546 JFM |
1200 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1201 | return -EINVAL; | |
e2997a72 HG |
1202 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1203 | return -ERESTARTSYS; | |
63eb9546 JFM |
1204 | if (!gspca_dev->present) { |
1205 | ret = -ENODEV; | |
1206 | goto out; | |
1207 | } | |
1208 | if (gspca_dev->nframes == 0) { | |
1209 | ret = -EINVAL; | |
1210 | goto out; | |
1211 | } | |
1212 | if (!gspca_dev->streaming) { | |
1213 | ret = gspca_init_transfer(gspca_dev); | |
1214 | if (ret < 0) | |
1215 | goto out; | |
1216 | } | |
335b3f88 | 1217 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1218 | if (gspca_debug & D_STREAM) { |
1219 | PDEBUG_MODE("stream on OK", | |
1220 | gspca_dev->pixfmt, | |
1221 | gspca_dev->width, | |
1222 | gspca_dev->height); | |
1223 | } | |
1224 | #endif | |
e2997a72 | 1225 | ret = 0; |
63eb9546 JFM |
1226 | out: |
1227 | mutex_unlock(&gspca_dev->queue_lock); | |
1228 | return ret; | |
1229 | } | |
1230 | ||
1231 | static int vidioc_streamoff(struct file *file, void *priv, | |
1232 | enum v4l2_buf_type buf_type) | |
1233 | { | |
1234 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1235 | int i, ret; |
63eb9546 | 1236 | |
63eb9546 JFM |
1237 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1238 | return -EINVAL; | |
4aa0d037 JFM |
1239 | if (!gspca_dev->streaming) |
1240 | return 0; | |
1241 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1242 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1243 | |
1244 | /* stop streaming */ | |
4aa0d037 JFM |
1245 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1246 | ret = -ERESTARTSYS; | |
1247 | goto out; | |
63eb9546 | 1248 | } |
4aa0d037 | 1249 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1250 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1251 | |
1252 | /* empty the application queues */ | |
1253 | for (i = 0; i < gspca_dev->nframes; i++) | |
1254 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1255 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1256 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1257 | gspca_dev->sequence = 0; | |
1258 | atomic_set(&gspca_dev->nevent, 0); | |
1259 | ret = 0; | |
4aa0d037 JFM |
1260 | out: |
1261 | mutex_unlock(&gspca_dev->queue_lock); | |
1262 | return ret; | |
63eb9546 JFM |
1263 | } |
1264 | ||
1265 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1266 | struct v4l2_jpegcompression *jpegcomp) | |
1267 | { | |
1268 | struct gspca_dev *gspca_dev = priv; | |
1269 | int ret; | |
1270 | ||
1271 | if (!gspca_dev->sd_desc->get_jcomp) | |
1272 | return -EINVAL; | |
e2997a72 HG |
1273 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1274 | return -ERESTARTSYS; | |
63eb9546 JFM |
1275 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1276 | mutex_unlock(&gspca_dev->usb_lock); | |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1281 | struct v4l2_jpegcompression *jpegcomp) | |
1282 | { | |
1283 | struct gspca_dev *gspca_dev = priv; | |
1284 | int ret; | |
1285 | ||
63eb9546 JFM |
1286 | if (!gspca_dev->sd_desc->set_jcomp) |
1287 | return -EINVAL; | |
f86d4a91 JP |
1288 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1289 | return -ERESTARTSYS; | |
63eb9546 JFM |
1290 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); |
1291 | mutex_unlock(&gspca_dev->usb_lock); | |
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1296 | struct v4l2_streamparm *parm) | |
1297 | { | |
1298 | struct gspca_dev *gspca_dev = priv; | |
1299 | ||
6a7eba24 | 1300 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1301 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1302 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1307 | struct v4l2_streamparm *parm) | |
1308 | { | |
1309 | struct gspca_dev *gspca_dev = priv; | |
1310 | int n; | |
1311 | ||
63eb9546 JFM |
1312 | n = parm->parm.capture.readbuffers; |
1313 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1314 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1315 | else | |
1316 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1317 | return 0; |
1318 | } | |
1319 | ||
6a7eba24 JFM |
1320 | static int vidioc_s_std(struct file *filp, void *priv, |
1321 | v4l2_std_id *parm) | |
1322 | { | |
1323 | return 0; | |
1324 | } | |
1325 | ||
63eb9546 JFM |
1326 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1327 | static int vidiocgmbuf(struct file *file, void *priv, | |
1328 | struct video_mbuf *mbuf) | |
1329 | { | |
1330 | struct gspca_dev *gspca_dev = file->private_data; | |
1331 | int i; | |
1332 | ||
1333 | PDEBUG(D_STREAM, "cgmbuf"); | |
1334 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1335 | int ret; |
6a7eba24 JFM |
1336 | |
1337 | { | |
1338 | struct v4l2_format fmt; | |
1339 | ||
1340 | memset(&fmt, 0, sizeof fmt); | |
1341 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1342 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1343 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1344 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1345 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1346 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1347 | if (ret != 0) |
1348 | return ret; | |
1349 | } | |
1350 | { | |
1351 | struct v4l2_requestbuffers rb; | |
1352 | ||
1353 | memset(&rb, 0, sizeof rb); | |
1354 | rb.count = 4; | |
1355 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1356 | rb.memory = V4L2_MEMORY_MMAP; | |
1357 | ret = vidioc_reqbufs(file, priv, &rb); | |
1358 | if (ret != 0) | |
1359 | return ret; | |
1360 | } | |
63eb9546 JFM |
1361 | } |
1362 | mbuf->frames = gspca_dev->nframes; | |
1363 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1364 | for (i = 0; i < mbuf->frames; i++) | |
1365 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1366 | return 0; | |
1367 | } | |
1368 | #endif | |
1369 | ||
1370 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1371 | { | |
1372 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1373 | struct gspca_frame *frame; |
63eb9546 JFM |
1374 | struct page *page; |
1375 | unsigned long addr, start, size; | |
1376 | int i, ret; | |
63eb9546 JFM |
1377 | |
1378 | start = vma->vm_start; | |
1379 | size = vma->vm_end - vma->vm_start; | |
1380 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1381 | ||
e2997a72 HG |
1382 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1383 | return -ERESTARTSYS; | |
63eb9546 JFM |
1384 | if (!gspca_dev->present) { |
1385 | ret = -ENODEV; | |
4aa0d037 JFM |
1386 | goto out; |
1387 | } | |
1388 | if (gspca_dev->capt_file != file) { | |
1389 | ret = -EINVAL; | |
1390 | goto out; | |
63eb9546 JFM |
1391 | } |
1392 | ||
efab8211 | 1393 | frame = NULL; |
63eb9546 JFM |
1394 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1395 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1396 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1397 | break; | |
1398 | } | |
1399 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1400 | == vma->vm_pgoff) { | |
1401 | frame = &gspca_dev->frame[i]; | |
1402 | break; | |
1403 | } | |
1404 | } | |
efab8211 | 1405 | if (frame == NULL) { |
63eb9546 JFM |
1406 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1407 | ret = -EINVAL; | |
4aa0d037 | 1408 | goto out; |
63eb9546 JFM |
1409 | } |
1410 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1411 | /* v4l1 maps all the buffers */ |
1412 | if (i != 0 | |
1413 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1414 | #endif |
ac0d6df6 | 1415 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1416 | PDEBUG(D_STREAM, "mmap bad size"); |
1417 | ret = -EINVAL; | |
4aa0d037 | 1418 | goto out; |
63eb9546 JFM |
1419 | } |
1420 | ||
1421 | /* | |
1422 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1423 | * device. It also prevents the region from being core dumped. | |
1424 | */ | |
1425 | vma->vm_flags |= VM_IO; | |
1426 | ||
1427 | addr = (unsigned long) frame->data; | |
1428 | while (size > 0) { | |
1429 | page = vmalloc_to_page((void *) addr); | |
1430 | ret = vm_insert_page(vma, start, page); | |
1431 | if (ret < 0) | |
4aa0d037 | 1432 | goto out; |
63eb9546 JFM |
1433 | start += PAGE_SIZE; |
1434 | addr += PAGE_SIZE; | |
1435 | size -= PAGE_SIZE; | |
1436 | } | |
1437 | ||
1438 | vma->vm_ops = &gspca_vm_ops; | |
1439 | vma->vm_private_data = frame; | |
1440 | gspca_vm_open(vma); | |
e2997a72 | 1441 | ret = 0; |
4aa0d037 | 1442 | out: |
63eb9546 JFM |
1443 | mutex_unlock(&gspca_dev->queue_lock); |
1444 | return ret; | |
1445 | } | |
1446 | ||
63eb9546 JFM |
1447 | /* |
1448 | * wait for a video frame | |
1449 | * | |
1450 | * If a frame is ready, its index is returned. | |
1451 | */ | |
d43fa32f | 1452 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1453 | int nonblock_ing) |
1454 | { | |
1455 | struct gspca_frame *frame; | |
1456 | int i, j, ret; | |
1457 | ||
d43fa32f | 1458 | /* check if a frame is ready */ |
63eb9546 JFM |
1459 | i = gspca_dev->fr_o; |
1460 | j = gspca_dev->fr_queue[i]; | |
1461 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1462 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1463 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1464 | goto ok; |
82643d0e | 1465 | } |
63eb9546 JFM |
1466 | if (nonblock_ing) /* no frame yet */ |
1467 | return -EAGAIN; | |
1468 | ||
1469 | /* wait till a frame is ready */ | |
1470 | for (;;) { | |
4aa0d037 JFM |
1471 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1472 | atomic_read(&gspca_dev->nevent) > 0, | |
1473 | msecs_to_jiffies(3000)); | |
1474 | if (ret <= 0) { | |
1475 | if (ret < 0) | |
82643d0e JFM |
1476 | return ret; /* interrupt */ |
1477 | return -EIO; /* timeout */ | |
4aa0d037 | 1478 | } |
82643d0e | 1479 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1480 | if (!gspca_dev->streaming || !gspca_dev->present) |
1481 | return -EIO; | |
63eb9546 JFM |
1482 | i = gspca_dev->fr_o; |
1483 | j = gspca_dev->fr_queue[i]; | |
1484 | frame = &gspca_dev->frame[j]; | |
1485 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1486 | break; | |
1487 | } | |
63eb9546 | 1488 | ok: |
63eb9546 JFM |
1489 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1490 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1491 | gspca_dev->fr_q, | |
1492 | gspca_dev->fr_i, | |
1493 | gspca_dev->fr_o); | |
e2997a72 | 1494 | |
739570bb JFM |
1495 | if (gspca_dev->sd_desc->dq_callback) { |
1496 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1497 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1498 | mutex_unlock(&gspca_dev->usb_lock); |
1499 | } | |
63eb9546 JFM |
1500 | return j; |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * dequeue a video buffer | |
1505 | * | |
1506 | * If nonblock_ing is false, block until a buffer is available. | |
1507 | */ | |
1508 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1509 | struct v4l2_buffer *v4l2_buf) | |
1510 | { | |
1511 | struct gspca_dev *gspca_dev = priv; | |
1512 | struct gspca_frame *frame; | |
1513 | int i, ret; | |
1514 | ||
1515 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 JFM |
1516 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1517 | return -EINVAL; | |
1518 | if (v4l2_buf->memory != gspca_dev->memory) | |
63eb9546 | 1519 | return -EINVAL; |
5b77ae77 JFM |
1520 | |
1521 | /* if not streaming, be sure the application will not loop forever */ | |
1522 | if (!(file->f_flags & O_NONBLOCK) | |
1523 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1524 | return -EINVAL; |
1525 | ||
5b77ae77 JFM |
1526 | /* only the capturing file may dequeue */ |
1527 | if (gspca_dev->capt_file != file) | |
1528 | return -EINVAL; | |
1529 | ||
1530 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1531 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1532 | return -ERESTARTSYS; | |
1533 | ||
d43fa32f | 1534 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1535 | if (ret < 0) |
4aa0d037 | 1536 | goto out; |
63eb9546 JFM |
1537 | i = ret; /* frame index */ |
1538 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1539 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1540 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1541 | frame->data, |
1542 | frame->v4l2_buf.bytesused)) { | |
1543 | PDEBUG(D_ERR|D_STREAM, | |
1544 | "dqbuf cp to user failed"); | |
1545 | ret = -EFAULT; | |
1546 | goto out; | |
1547 | } | |
1548 | } | |
63eb9546 JFM |
1549 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1550 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1551 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1552 | ret = 0; | |
4aa0d037 | 1553 | out: |
63eb9546 JFM |
1554 | mutex_unlock(&gspca_dev->read_lock); |
1555 | return ret; | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * queue a video buffer | |
1560 | * | |
1561 | * Attempting to queue a buffer that has already been | |
1562 | * queued will return -EINVAL. | |
1563 | */ | |
1564 | static int vidioc_qbuf(struct file *file, void *priv, | |
1565 | struct v4l2_buffer *v4l2_buf) | |
1566 | { | |
1567 | struct gspca_dev *gspca_dev = priv; | |
1568 | struct gspca_frame *frame; | |
1569 | int i, index, ret; | |
1570 | ||
1571 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1572 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1573 | return -EINVAL; | |
1574 | ||
5b77ae77 JFM |
1575 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1576 | return -ERESTARTSYS; | |
1577 | ||
63eb9546 JFM |
1578 | index = v4l2_buf->index; |
1579 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1580 | PDEBUG(D_FRAM, |
63eb9546 | 1581 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1582 | ret = -EINVAL; |
1583 | goto out; | |
63eb9546 | 1584 | } |
5b77ae77 | 1585 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1586 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1587 | ret = -EINVAL; |
1588 | goto out; | |
63eb9546 | 1589 | } |
e2997a72 | 1590 | |
5b77ae77 | 1591 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1592 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1593 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1594 | ret = -EINVAL; |
1595 | goto out; | |
1596 | } | |
1597 | ||
1598 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1599 | |
d43fa32f | 1600 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1601 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1602 | frame->v4l2_buf.length = v4l2_buf->length; | |
1603 | } | |
1604 | ||
1605 | /* put the buffer in the 'queued' queue */ | |
1606 | i = gspca_dev->fr_q; | |
1607 | gspca_dev->fr_queue[i] = index; | |
1608 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1609 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1610 | gspca_dev->fr_q, | |
1611 | gspca_dev->fr_i, | |
1612 | gspca_dev->fr_o); | |
1613 | ||
1614 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1615 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1616 | ret = 0; | |
1617 | out: | |
1618 | mutex_unlock(&gspca_dev->queue_lock); | |
1619 | return ret; | |
1620 | } | |
1621 | ||
d43fa32f JFM |
1622 | /* |
1623 | * allocate the resources for read() | |
1624 | */ | |
1625 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1626 | struct file *file) | |
63eb9546 | 1627 | { |
63eb9546 | 1628 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1629 | int i, ret; |
63eb9546 | 1630 | |
d43fa32f | 1631 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1632 | if (gspca_dev->nframes == 0) { |
1633 | struct v4l2_requestbuffers rb; | |
1634 | ||
1635 | memset(&rb, 0, sizeof rb); | |
1636 | rb.count = gspca_dev->nbufread; | |
1637 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1638 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1639 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1640 | if (ret != 0) { | |
d43fa32f | 1641 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1642 | return ret; |
1643 | } | |
1644 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1645 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1646 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1647 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1648 | v4l2_buf.index = i; | |
63eb9546 JFM |
1649 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1650 | if (ret != 0) { | |
1651 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1652 | return ret; | |
1653 | } | |
1654 | } | |
d43fa32f JFM |
1655 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1656 | } | |
4aa0d037 | 1657 | |
d43fa32f JFM |
1658 | /* start streaming */ |
1659 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1660 | if (ret != 0) | |
1661 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1662 | return ret; | |
1663 | } | |
1664 | ||
1665 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1666 | { | |
1667 | struct gspca_dev *gspca_dev = file->private_data; | |
1668 | int i, ret; | |
1669 | ||
1670 | PDEBUG(D_FRAM, "poll"); | |
1671 | ||
1672 | poll_wait(file, &gspca_dev->wq, wait); | |
1673 | if (!gspca_dev->present) | |
1674 | return POLLERR; | |
1675 | ||
5b77ae77 JFM |
1676 | /* if reqbufs is not done, the user would use read() */ |
1677 | if (gspca_dev->nframes == 0) { | |
1678 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1679 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1680 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1681 | if (ret != 0) |
1682 | return POLLERR; | |
63eb9546 JFM |
1683 | } |
1684 | ||
d43fa32f JFM |
1685 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1686 | return POLLERR; | |
1687 | if (!gspca_dev->present) { | |
1688 | ret = POLLERR; | |
1689 | goto out; | |
1690 | } | |
1691 | ||
5b77ae77 | 1692 | /* check the next incoming buffer */ |
d43fa32f JFM |
1693 | i = gspca_dev->fr_o; |
1694 | i = gspca_dev->fr_queue[i]; | |
1695 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1696 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1697 | else | |
1698 | ret = 0; | |
1699 | out: | |
1700 | mutex_unlock(&gspca_dev->queue_lock); | |
1701 | return ret; | |
1702 | } | |
1703 | ||
1704 | static ssize_t dev_read(struct file *file, char __user *data, | |
1705 | size_t count, loff_t *ppos) | |
1706 | { | |
1707 | struct gspca_dev *gspca_dev = file->private_data; | |
1708 | struct gspca_frame *frame; | |
1709 | struct v4l2_buffer v4l2_buf; | |
1710 | struct timeval timestamp; | |
82643d0e | 1711 | int n, ret, ret2; |
d43fa32f | 1712 | |
a9e11134 | 1713 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1714 | if (!gspca_dev->present) |
1715 | return -ENODEV; | |
1716 | switch (gspca_dev->memory) { | |
1717 | case GSPCA_MEMORY_NO: /* first time */ | |
1718 | ret = read_alloc(gspca_dev, file); | |
1719 | if (ret != 0) | |
1720 | return ret; | |
1721 | break; | |
1722 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1723 | if (gspca_dev->capt_file == file) |
1724 | break; | |
1725 | /* fall thru */ | |
d43fa32f JFM |
1726 | default: |
1727 | return -EINVAL; | |
1728 | } | |
1729 | ||
63eb9546 JFM |
1730 | /* get a frame */ |
1731 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1732 | timestamp.tv_sec--; | |
82643d0e JFM |
1733 | n = 2; |
1734 | for (;;) { | |
63eb9546 JFM |
1735 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1736 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1737 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1738 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1739 | if (ret != 0) { | |
1740 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1741 | return ret; | |
1742 | } | |
1743 | ||
1744 | /* if the process slept for more than 1 second, | |
219423c1 | 1745 | * get a newer frame */ |
63eb9546 | 1746 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1747 | if (--n < 0) |
1748 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1749 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1750 | break; | |
1751 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1752 | if (ret != 0) { | |
1753 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1754 | return ret; | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | /* copy the frame */ | |
ac0d6df6 JFM |
1759 | if (count > frame->v4l2_buf.bytesused) |
1760 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1761 | ret = copy_to_user(data, frame->data, count); |
1762 | if (ret != 0) { | |
1763 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1764 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1765 | ret = -EFAULT; |
1766 | goto out; | |
1767 | } | |
1768 | ret = count; | |
1769 | out: | |
1770 | /* in each case, requeue the buffer */ | |
1771 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1772 | if (ret2 != 0) | |
1773 | return ret2; | |
1774 | return ret; | |
1775 | } | |
1776 | ||
63eb9546 JFM |
1777 | static struct file_operations dev_fops = { |
1778 | .owner = THIS_MODULE, | |
1779 | .open = dev_open, | |
1780 | .release = dev_close, | |
1781 | .read = dev_read, | |
1782 | .mmap = dev_mmap, | |
1783 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1784 | #ifdef CONFIG_COMPAT |
1785 | .compat_ioctl = v4l_compat_ioctl32, | |
1786 | #endif | |
63eb9546 JFM |
1787 | .llseek = no_llseek, |
1788 | .poll = dev_poll, | |
1789 | }; | |
1790 | ||
a399810c | 1791 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1792 | .vidioc_querycap = vidioc_querycap, |
1793 | .vidioc_dqbuf = vidioc_dqbuf, | |
1794 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1795 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1796 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1797 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1798 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1799 | .vidioc_streamon = vidioc_streamon, |
1800 | .vidioc_queryctrl = vidioc_queryctrl, | |
1801 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1802 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1803 | .vidioc_querymenu = vidioc_querymenu, | |
1804 | .vidioc_enum_input = vidioc_enum_input, | |
1805 | .vidioc_g_input = vidioc_g_input, | |
1806 | .vidioc_s_input = vidioc_s_input, | |
1807 | .vidioc_reqbufs = vidioc_reqbufs, | |
1808 | .vidioc_querybuf = vidioc_querybuf, | |
1809 | .vidioc_streamoff = vidioc_streamoff, | |
1810 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1811 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1812 | .vidioc_g_parm = vidioc_g_parm, | |
1813 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1814 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1815 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1816 | .vidiocgmbuf = vidiocgmbuf, | |
1817 | #endif | |
1818 | }; | |
1819 | ||
a399810c HV |
1820 | static struct video_device gspca_template = { |
1821 | .name = "gspca main driver", | |
a399810c HV |
1822 | .fops = &dev_fops, |
1823 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 1824 | .release = gspca_release, |
a399810c HV |
1825 | .minor = -1, |
1826 | }; | |
1827 | ||
63eb9546 JFM |
1828 | /* |
1829 | * probe and create a new gspca device | |
1830 | * | |
1831 | * This function must be called by the sub-driver when it is | |
1832 | * called for probing a new device. | |
1833 | */ | |
1834 | int gspca_dev_probe(struct usb_interface *intf, | |
1835 | const struct usb_device_id *id, | |
1836 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1837 | int dev_size, |
1838 | struct module *module) | |
63eb9546 JFM |
1839 | { |
1840 | struct usb_interface_descriptor *interface; | |
1841 | struct gspca_dev *gspca_dev; | |
1842 | struct usb_device *dev = interface_to_usbdev(intf); | |
1843 | int ret; | |
63eb9546 | 1844 | |
6a7eba24 | 1845 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1846 | |
1847 | /* we don't handle multi-config cameras */ | |
1848 | if (dev->descriptor.bNumConfigurations != 1) | |
1849 | return -ENODEV; | |
1850 | interface = &intf->cur_altsetting->desc; | |
1851 | if (interface->bInterfaceNumber > 0) | |
1852 | return -ENODEV; | |
1853 | ||
1854 | /* create the device */ | |
1855 | if (dev_size < sizeof *gspca_dev) | |
1856 | dev_size = sizeof *gspca_dev; | |
1857 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 1858 | if (!gspca_dev) { |
63eb9546 | 1859 | err("couldn't kzalloc gspca struct"); |
e293e599 | 1860 | return -ENOMEM; |
63eb9546 | 1861 | } |
8295d99e JFM |
1862 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
1863 | if (!gspca_dev->usb_buf) { | |
1864 | err("out of memory"); | |
e293e599 | 1865 | ret = -ENOMEM; |
8295d99e JFM |
1866 | goto out; |
1867 | } | |
63eb9546 JFM |
1868 | gspca_dev->dev = dev; |
1869 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1870 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 | 1871 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 1872 | gspca_dev->nbufread = 2; |
ff374747 | 1873 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 1874 | |
012d6b02 | 1875 | /* configure the subdriver and initialize the USB device */ |
63eb9546 | 1876 | ret = gspca_dev->sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
1877 | if (ret < 0) |
1878 | goto out; | |
1879 | ret = gspca_dev->sd_desc->init(gspca_dev); | |
63eb9546 JFM |
1880 | if (ret < 0) |
1881 | goto out; | |
1882 | ret = gspca_set_alt0(gspca_dev); | |
1883 | if (ret < 0) | |
1884 | goto out; | |
1885 | gspca_set_default_mode(gspca_dev); | |
1886 | ||
1887 | mutex_init(&gspca_dev->usb_lock); | |
1888 | mutex_init(&gspca_dev->read_lock); | |
1889 | mutex_init(&gspca_dev->queue_lock); | |
1890 | init_waitqueue_head(&gspca_dev->wq); | |
1891 | ||
1892 | /* init video stuff */ | |
e07a1d8a JFM |
1893 | gspca_dev->vdev = video_device_alloc(); |
1894 | memcpy(gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
1895 | gspca_dev->vdev->parent = &dev->dev; | |
5c4fa002 | 1896 | gspca_dev->module = module; |
ee56a4d3 | 1897 | gspca_dev->present = 1; |
a12ca6a6 | 1898 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 JFM |
1899 | VFL_TYPE_GRABBER, |
1900 | video_nr); | |
1901 | if (ret < 0) { | |
1902 | err("video_register_device err %d", ret); | |
1903 | goto out; | |
1904 | } | |
1905 | ||
63eb9546 JFM |
1906 | usb_set_intfdata(intf, gspca_dev); |
1907 | PDEBUG(D_PROBE, "probe ok"); | |
1908 | return 0; | |
1909 | out: | |
e07a1d8a JFM |
1910 | kfree(gspca_dev->usb_buf); |
1911 | kfree(gspca_dev); | |
63eb9546 JFM |
1912 | return ret; |
1913 | } | |
1914 | EXPORT_SYMBOL(gspca_dev_probe); | |
1915 | ||
1916 | /* | |
1917 | * USB disconnection | |
1918 | * | |
1919 | * This function must be called by the sub-driver | |
1920 | * when the device disconnects, after the specific resources are freed. | |
1921 | */ | |
1922 | void gspca_disconnect(struct usb_interface *intf) | |
1923 | { | |
4aa0d037 | 1924 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 1925 | |
6e4ae872 JFM |
1926 | gspca_dev->present = 0; |
1927 | gspca_dev->streaming = 0; | |
1928 | ||
6b060ffe FZ |
1929 | usb_set_intfdata(intf, NULL); |
1930 | ||
a12ca6a6 JFM |
1931 | /* release the device */ |
1932 | /* (this will call gspca_release() immediatly or on last close) */ | |
1933 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 1934 | |
63eb9546 JFM |
1935 | PDEBUG(D_PROBE, "disconnect complete"); |
1936 | } | |
1937 | EXPORT_SYMBOL(gspca_disconnect); | |
1938 | ||
6a709749 JFM |
1939 | #ifdef CONFIG_PM |
1940 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
1941 | { | |
1942 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1943 | ||
1944 | if (!gspca_dev->streaming) | |
1945 | return 0; | |
1946 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
1947 | if (gspca_dev->sd_desc->stopN) |
1948 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
1949 | destroy_urbs(gspca_dev); |
1950 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
1951 | if (gspca_dev->sd_desc->stop0) |
1952 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
1953 | return 0; |
1954 | } | |
1955 | EXPORT_SYMBOL(gspca_suspend); | |
1956 | ||
1957 | int gspca_resume(struct usb_interface *intf) | |
1958 | { | |
1959 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1960 | ||
1961 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
1962 | gspca_dev->sd_desc->init(gspca_dev); |
1963 | if (gspca_dev->streaming) | |
1964 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 1965 | return 0; |
6a709749 JFM |
1966 | } |
1967 | EXPORT_SYMBOL(gspca_resume); | |
1968 | #endif | |
dcef3237 HG |
1969 | /* -- cam driver utility functions -- */ |
1970 | ||
1971 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1972 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1973 | ||
1974 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
1975 | where changed. */ | |
1976 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
1977 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
1978 | { | |
1979 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
1980 | const struct ctrl *gain_ctrl = NULL; | |
1981 | const struct ctrl *exposure_ctrl = NULL; | |
1982 | const struct ctrl *autogain_ctrl = NULL; | |
1983 | int retval = 0; | |
1984 | ||
1985 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
1986 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
1987 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1988 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
1989 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1990 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
1991 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1992 | } | |
1993 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
1994 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
1995 | "on cam without (auto)gain/exposure"); | |
1996 | return 0; | |
1997 | } | |
1998 | ||
1999 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2000 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2001 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2002 | return 0; | |
2003 | ||
2004 | orig_gain = gain; | |
2005 | orig_exposure = exposure; | |
2006 | ||
2007 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2008 | desired lumination fast (with the risc of a slight overshoot) */ | |
2009 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2010 | ||
1c44d81d | 2011 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2012 | avg_lum, desired_avg_lum, steps); |
2013 | ||
2014 | for (i = 0; i < steps; i++) { | |
2015 | if (avg_lum > desired_avg_lum) { | |
2016 | if (gain > gain_knee) | |
2017 | gain--; | |
2018 | else if (exposure > exposure_knee) | |
2019 | exposure--; | |
2020 | else if (gain > gain_ctrl->qctrl.default_value) | |
2021 | gain--; | |
2022 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2023 | exposure--; | |
2024 | else if (gain > gain_ctrl->qctrl.minimum) | |
2025 | gain--; | |
2026 | else | |
2027 | break; | |
2028 | } else { | |
2029 | if (gain < gain_ctrl->qctrl.default_value) | |
2030 | gain++; | |
2031 | else if (exposure < exposure_knee) | |
2032 | exposure++; | |
2033 | else if (gain < gain_knee) | |
2034 | gain++; | |
2035 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2036 | exposure++; | |
2037 | else if (gain < gain_ctrl->qctrl.maximum) | |
2038 | gain++; | |
2039 | else | |
2040 | break; | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | if (gain != orig_gain) { | |
2045 | gain_ctrl->set(gspca_dev, gain); | |
2046 | retval = 1; | |
2047 | } | |
2048 | if (exposure != orig_exposure) { | |
2049 | exposure_ctrl->set(gspca_dev, exposure); | |
2050 | retval = 1; | |
2051 | } | |
2052 | ||
2053 | return retval; | |
2054 | } | |
2055 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2056 | ||
63eb9546 JFM |
2057 | /* -- module insert / remove -- */ |
2058 | static int __init gspca_init(void) | |
2059 | { | |
bb64e86c JFM |
2060 | info("main v%d.%d.%d registered", |
2061 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2062 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2063 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2064 | return 0; |
2065 | } | |
2066 | static void __exit gspca_exit(void) | |
2067 | { | |
2068 | info("main deregistered"); | |
2069 | } | |
2070 | ||
2071 | module_init(gspca_init); | |
2072 | module_exit(gspca_exit); | |
2073 | ||
335b3f88 | 2074 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2075 | module_param_named(debug, gspca_debug, int, 0644); |
2076 | MODULE_PARM_DESC(debug, | |
2077 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2078 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2079 | " 0x0100: v4l2"); | |
6a7eba24 | 2080 | #endif |