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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; | |
63eb9546 | 303 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
d43fa32f JFM |
304 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
305 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
306 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
307 | frame->v4l2_buf.bytesused, | |
308 | gspca_dev->fr_q, | |
309 | i, | |
310 | gspca_dev->fr_o); | |
311 | j = gspca_dev->fr_queue[i]; | |
312 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
313 | } |
314 | return frame; | |
315 | } | |
316 | EXPORT_SYMBOL(gspca_frame_add); | |
317 | ||
318 | static int gspca_is_compressed(__u32 format) | |
319 | { | |
320 | switch (format) { | |
321 | case V4L2_PIX_FMT_MJPEG: | |
322 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 323 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 324 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
325 | return 1; |
326 | } | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static void *rvmalloc(unsigned long size) | |
331 | { | |
332 | void *mem; | |
333 | unsigned long adr; | |
334 | ||
63eb9546 | 335 | mem = vmalloc_32(size); |
efab8211 | 336 | if (mem != NULL) { |
63eb9546 JFM |
337 | adr = (unsigned long) mem; |
338 | while ((long) size > 0) { | |
339 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
340 | adr += PAGE_SIZE; | |
341 | size -= PAGE_SIZE; | |
342 | } | |
343 | } | |
344 | return mem; | |
345 | } | |
346 | ||
ac0d6df6 | 347 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
348 | { |
349 | unsigned long adr; | |
350 | ||
63eb9546 | 351 | adr = (unsigned long) mem; |
ac0d6df6 | 352 | while (size > 0) { |
63eb9546 JFM |
353 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
354 | adr += PAGE_SIZE; | |
355 | size -= PAGE_SIZE; | |
356 | } | |
357 | vfree(mem); | |
358 | } | |
359 | ||
360 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 361 | unsigned int count) |
63eb9546 | 362 | { |
d43fa32f JFM |
363 | struct gspca_frame *frame; |
364 | unsigned int frsz; | |
365 | int i; | |
63eb9546 | 366 | |
c2446b3e JFM |
367 | i = gspca_dev->curr_mode; |
368 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 369 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 370 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 371 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
372 | if (count > GSPCA_MAX_FRAMES) |
373 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
374 | gspca_dev->frbuf = rvmalloc(frsz * count); |
375 | if (!gspca_dev->frbuf) { | |
376 | err("frame alloc failed"); | |
377 | return -ENOMEM; | |
63eb9546 JFM |
378 | } |
379 | gspca_dev->nframes = count; | |
380 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
381 | frame = &gspca_dev->frame[i]; |
382 | frame->v4l2_buf.index = i; | |
383 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
384 | frame->v4l2_buf.flags = 0; | |
385 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
386 | frame->v4l2_buf.length = frsz; | |
387 | frame->v4l2_buf.memory = gspca_dev->memory; | |
388 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 389 | frame->data = frame->data_end = |
d43fa32f | 390 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 391 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
392 | } |
393 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
394 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
395 | gspca_dev->sequence = 0; | |
d43fa32f | 396 | return 0; |
63eb9546 JFM |
397 | } |
398 | ||
399 | static void frame_free(struct gspca_dev *gspca_dev) | |
400 | { | |
401 | int i; | |
402 | ||
403 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 404 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
405 | rvfree(gspca_dev->frbuf, |
406 | gspca_dev->nframes * gspca_dev->frsz); | |
407 | gspca_dev->frbuf = NULL; | |
408 | for (i = 0; i < gspca_dev->nframes; i++) | |
409 | gspca_dev->frame[i].data = NULL; | |
410 | } | |
411 | gspca_dev->nframes = 0; | |
412 | } | |
413 | ||
d43fa32f | 414 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
415 | { |
416 | struct urb *urb; | |
417 | unsigned int i; | |
418 | ||
419 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 420 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 421 | urb = gspca_dev->urb[i]; |
63eb9546 | 422 | if (urb == NULL) |
d43fa32f | 423 | break; |
63eb9546 | 424 | |
4aa0d037 | 425 | gspca_dev->urb[i] = NULL; |
63eb9546 | 426 | usb_kill_urb(urb); |
efab8211 | 427 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
428 | usb_buffer_free(gspca_dev->dev, |
429 | urb->transfer_buffer_length, | |
4aa0d037 | 430 | urb->transfer_buffer, |
63eb9546 | 431 | urb->transfer_dma); |
63eb9546 JFM |
432 | usb_free_urb(urb); |
433 | } | |
63eb9546 JFM |
434 | } |
435 | ||
436 | /* | |
219423c1 | 437 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 438 | */ |
0be01004 JFM |
439 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
440 | __u8 epaddr, | |
441 | __u8 xfer) | |
63eb9546 JFM |
442 | { |
443 | struct usb_host_endpoint *ep; | |
444 | int i, attr; | |
445 | ||
446 | epaddr |= USB_DIR_IN; | |
447 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
448 | ep = &alt->endpoint[i]; | |
449 | if (ep->desc.bEndpointAddress == epaddr) { | |
450 | attr = ep->desc.bmAttributes | |
451 | & USB_ENDPOINT_XFERTYPE_MASK; | |
0be01004 | 452 | if (attr == xfer) |
63eb9546 JFM |
453 | return ep; |
454 | break; | |
455 | } | |
456 | } | |
457 | return NULL; | |
458 | } | |
459 | ||
460 | /* | |
219423c1 | 461 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
462 | * |
463 | * The endpoint is defined by the subdriver. | |
464 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
465 | * This routine may be called many times when the bandwidth is too small | |
466 | * (the bandwidth is checked on urb submit). | |
467 | */ | |
0be01004 | 468 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
469 | { |
470 | struct usb_interface *intf; | |
471 | struct usb_host_endpoint *ep; | |
472 | int i, ret; | |
473 | ||
474 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 475 | ep = NULL; |
63eb9546 | 476 | i = gspca_dev->alt; /* previous alt setting */ |
95d9142c JFM |
477 | |
478 | /* try isoc */ | |
63eb9546 | 479 | while (--i > 0) { /* alt 0 is unusable */ |
0be01004 JFM |
480 | ep = alt_xfer(&intf->altsetting[i], |
481 | gspca_dev->cam.epaddr, | |
95d9142c | 482 | USB_ENDPOINT_XFER_ISOC); |
63eb9546 JFM |
483 | if (ep) |
484 | break; | |
485 | } | |
95d9142c JFM |
486 | |
487 | /* if no isoc, try bulk */ | |
6a7eba24 | 488 | if (ep == NULL) { |
95d9142c JFM |
489 | ep = alt_xfer(&intf->altsetting[0], |
490 | gspca_dev->cam.epaddr, | |
491 | USB_ENDPOINT_XFER_BULK); | |
492 | if (ep == NULL) { | |
493 | err("no transfer endpoint found"); | |
494 | return NULL; | |
495 | } | |
63eb9546 | 496 | } |
0be01004 | 497 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 498 | i, ep->desc.bEndpointAddress); |
95d9142c JFM |
499 | if (i > 0) { |
500 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
501 | if (ret < 0) { | |
502 | err("set interface err %d", ret); | |
503 | return NULL; | |
504 | } | |
63eb9546 | 505 | } |
d43fa32f | 506 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
507 | return ep; |
508 | } | |
509 | ||
510 | /* | |
0be01004 | 511 | * create the URBs for image transfer |
63eb9546 JFM |
512 | */ |
513 | static int create_urbs(struct gspca_dev *gspca_dev, | |
514 | struct usb_host_endpoint *ep) | |
515 | { | |
516 | struct urb *urb; | |
d43fa32f | 517 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
518 | |
519 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 520 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 521 | |
95d9142c JFM |
522 | if (gspca_dev->alt != 0) { /* isoc */ |
523 | ||
524 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
525 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
0be01004 JFM |
526 | npkt = ISO_MAX_SIZE / psize; |
527 | if (npkt > ISO_MAX_PKT) | |
528 | npkt = ISO_MAX_PKT; | |
529 | bsize = psize * npkt; | |
530 | PDEBUG(D_STREAM, | |
531 | "isoc %d pkts size %d = bsize:%d", | |
532 | npkt, psize, bsize); | |
51977a8d | 533 | nurbs = DEF_NURBS; |
95d9142c | 534 | } else { /* bulk */ |
0be01004 | 535 | npkt = 0; |
dff369aa | 536 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
537 | if (bsize == 0) |
538 | bsize = psize; | |
0be01004 | 539 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
540 | if (gspca_dev->cam.bulk_nurbs != 0) |
541 | nurbs = gspca_dev->cam.bulk_nurbs; | |
542 | else | |
543 | nurbs = 1; | |
0be01004 JFM |
544 | } |
545 | ||
6a7eba24 | 546 | gspca_dev->nurbs = nurbs; |
d43fa32f | 547 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
548 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
549 | if (!urb) { | |
550 | err("usb_alloc_urb failed"); | |
0d0548e6 | 551 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
552 | return -ENOMEM; |
553 | } | |
4aa0d037 | 554 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
555 | bsize, |
556 | GFP_KERNEL, | |
557 | &urb->transfer_dma); | |
558 | ||
4aa0d037 | 559 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 560 | usb_free_urb(urb); |
63eb9546 | 561 | err("usb_buffer_urb failed"); |
0d0548e6 | 562 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
563 | return -ENOMEM; |
564 | } | |
4aa0d037 | 565 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
566 | urb->dev = gspca_dev->dev; |
567 | urb->context = gspca_dev; | |
63eb9546 | 568 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
569 | if (npkt != 0) { /* ISOC */ |
570 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
571 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
572 | urb->transfer_flags = URB_ISO_ASAP |
573 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
574 | urb->interval = ep->desc.bInterval; |
575 | urb->complete = isoc_irq; | |
576 | urb->number_of_packets = npkt; | |
577 | for (i = 0; i < npkt; i++) { | |
578 | urb->iso_frame_desc[i].length = psize; | |
579 | urb->iso_frame_desc[i].offset = psize * i; | |
580 | } | |
581 | } else { /* bulk */ | |
582 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
583 | ep->desc.bEndpointAddress), | |
6c49da7f | 584 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 585 | urb->complete = bulk_irq; |
63eb9546 JFM |
586 | } |
587 | } | |
588 | return 0; | |
589 | } | |
590 | ||
591 | /* | |
592 | * start the USB transfer | |
593 | */ | |
594 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
595 | { | |
63eb9546 JFM |
596 | struct usb_host_endpoint *ep; |
597 | int n, ret; | |
598 | ||
e2997a72 HG |
599 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
600 | return -ERESTARTSYS; | |
63eb9546 | 601 | |
d43fa32f JFM |
602 | /* set the higher alternate setting and |
603 | * loop until urb submit succeeds */ | |
604 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 605 | for (;;) { |
d43fa32f | 606 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
0be01004 | 607 | ep = get_ep(gspca_dev); |
63eb9546 JFM |
608 | if (ep == NULL) { |
609 | ret = -EIO; | |
610 | goto out; | |
611 | } | |
612 | ret = create_urbs(gspca_dev, ep); | |
613 | if (ret < 0) | |
614 | goto out; | |
615 | ||
8fe2f1d5 JFM |
616 | /* clear the bulk endpoint */ |
617 | if (gspca_dev->alt == 0) /* if bulk transfer */ | |
618 | usb_clear_halt(gspca_dev->dev, | |
619 | usb_rcvintpipe(gspca_dev->dev, | |
620 | gspca_dev->cam.epaddr)); | |
621 | ||
63eb9546 | 622 | /* start the cam */ |
72ab97ce JFM |
623 | ret = gspca_dev->sd_desc->start(gspca_dev); |
624 | if (ret < 0) { | |
625 | destroy_urbs(gspca_dev); | |
626 | goto out; | |
627 | } | |
63eb9546 | 628 | gspca_dev->streaming = 1; |
63eb9546 | 629 | |
dff369aa AO |
630 | /* some bulk transfers are started by the subdriver */ |
631 | if (gspca_dev->alt == 0 && gspca_dev->cam.bulk_nurbs == 0) | |
51977a8d JFM |
632 | break; |
633 | ||
63eb9546 | 634 | /* submit the URBs */ |
d43fa32f | 635 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 636 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
637 | if (ret < 0) { |
638 | PDEBUG(D_ERR|D_STREAM, | |
639 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 640 | gspca_dev->streaming = 0; |
d43fa32f | 641 | destroy_urbs(gspca_dev); |
9edf1a69 | 642 | if (ret == -ENOSPC) { |
abf485fe | 643 | msleep(20); /* wait for kill |
9edf1a69 | 644 | * complete */ |
63eb9546 | 645 | break; /* try the previous alt */ |
9edf1a69 | 646 | } |
63eb9546 JFM |
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) | |
f955c4fc | 664 | PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret); |
63eb9546 JFM |
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; |
98522a7b JFM |
672 | if (gspca_dev->present |
673 | && gspca_dev->sd_desc->stopN) | |
674 | gspca_dev->sd_desc->stopN(gspca_dev); | |
675 | destroy_urbs(gspca_dev); | |
676 | gspca_set_alt0(gspca_dev); | |
677 | if (gspca_dev->sd_desc->stop0) | |
678 | gspca_dev->sd_desc->stop0(gspca_dev); | |
679 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 JFM |
680 | } |
681 | ||
d43fa32f | 682 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
683 | { |
684 | int i; | |
685 | ||
686 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
687 | gspca_dev->curr_mode = i; | |
688 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
689 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 690 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
691 | } |
692 | ||
693 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
694 | int width, int height) | |
695 | { | |
696 | int i; | |
697 | ||
d43fa32f JFM |
698 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
699 | if (width >= gspca_dev->cam.cam_mode[i].width | |
700 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
701 | break; |
702 | } | |
63eb9546 JFM |
703 | return i; |
704 | } | |
705 | ||
63eb9546 JFM |
706 | /* |
707 | * search a mode with the right pixel format | |
708 | */ | |
709 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
710 | int mode, | |
711 | int pixfmt) | |
712 | { | |
713 | int modeU, modeD; | |
714 | ||
715 | modeU = modeD = mode; | |
716 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
717 | if (--modeD >= 0) { | |
c2446b3e JFM |
718 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
719 | == pixfmt) | |
63eb9546 JFM |
720 | return modeD; |
721 | } | |
722 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
723 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
724 | == pixfmt) | |
63eb9546 JFM |
725 | return modeU; |
726 | } | |
727 | } | |
728 | return -EINVAL; | |
729 | } | |
730 | ||
e078770a | 731 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
732 | struct v4l2_fmtdesc *fmtdesc) |
733 | { | |
734 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 735 | int i, j, index; |
63eb9546 JFM |
736 | __u32 fmt_tb[8]; |
737 | ||
63eb9546 JFM |
738 | /* give an index to each format */ |
739 | index = 0; | |
740 | j = 0; | |
741 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 742 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
743 | j = 0; |
744 | for (;;) { | |
745 | if (fmt_tb[j] == fmt_tb[index]) | |
746 | break; | |
747 | j++; | |
748 | } | |
749 | if (j == index) { | |
750 | if (fmtdesc->index == index) | |
751 | break; /* new format */ | |
752 | index++; | |
80297125 | 753 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
754 | return -EINVAL; |
755 | } | |
756 | } | |
757 | if (i < 0) | |
758 | return -EINVAL; /* no more format */ | |
759 | ||
63eb9546 JFM |
760 | fmtdesc->pixelformat = fmt_tb[index]; |
761 | if (gspca_is_compressed(fmt_tb[index])) | |
762 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 763 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
764 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
765 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
766 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
767 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
768 | fmtdesc->description[4] = '\0'; | |
769 | return 0; | |
770 | } | |
771 | ||
e078770a | 772 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
773 | struct v4l2_format *fmt) |
774 | { | |
775 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 776 | int mode; |
63eb9546 | 777 | |
c2446b3e JFM |
778 | mode = gspca_dev->curr_mode; |
779 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
780 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
781 | return 0; |
782 | } | |
783 | ||
e078770a | 784 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
785 | struct v4l2_format *fmt) |
786 | { | |
24c530b4 | 787 | int w, h, mode, mode2; |
63eb9546 | 788 | |
4aa0d037 JFM |
789 | w = fmt->fmt.pix.width; |
790 | h = fmt->fmt.pix.height; | |
d43fa32f | 791 | |
335b3f88 | 792 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
793 | if (gspca_debug & D_CONF) |
794 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
795 | #endif | |
796 | /* search the closest mode for width and height */ | |
797 | mode = wxh_to_mode(gspca_dev, w, h); | |
798 | ||
799 | /* OK if right palette */ | |
c2446b3e JFM |
800 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
801 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
802 | |
803 | /* else, search the closest mode with the same pixel format */ | |
804 | mode2 = gspca_get_mode(gspca_dev, mode, | |
805 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 806 | if (mode2 >= 0) |
63eb9546 | 807 | mode = mode2; |
c2446b3e JFM |
808 | /* else |
809 | ; * no chance, return this mode */ | |
63eb9546 | 810 | } |
c2446b3e JFM |
811 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
812 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
813 | return mode; /* used when s_fmt */ |
814 | } | |
815 | ||
e078770a | 816 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
817 | void *priv, |
818 | struct v4l2_format *fmt) | |
819 | { | |
4aa0d037 | 820 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
821 | int ret; |
822 | ||
e078770a | 823 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
824 | if (ret < 0) |
825 | return ret; | |
826 | return 0; | |
827 | } | |
828 | ||
e078770a | 829 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
830 | struct v4l2_format *fmt) |
831 | { | |
832 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 833 | int ret; |
63eb9546 | 834 | |
e2997a72 HG |
835 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
836 | return -ERESTARTSYS; | |
d43fa32f | 837 | |
e078770a | 838 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
839 | if (ret < 0) |
840 | goto out; | |
841 | ||
d43fa32f JFM |
842 | if (gspca_dev->nframes != 0 |
843 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
844 | ret = -EINVAL; | |
845 | goto out; | |
846 | } | |
847 | ||
50a871fe JFM |
848 | if (ret == gspca_dev->curr_mode) { |
849 | ret = 0; | |
63eb9546 | 850 | goto out; /* same mode */ |
50a871fe | 851 | } |
d43fa32f JFM |
852 | |
853 | if (gspca_dev->streaming) { | |
854 | ret = -EBUSY; | |
855 | goto out; | |
e2997a72 | 856 | } |
4aa0d037 JFM |
857 | gspca_dev->width = fmt->fmt.pix.width; |
858 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
859 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
860 | gspca_dev->curr_mode = ret; | |
d43fa32f | 861 | |
d43fa32f | 862 | ret = 0; |
63eb9546 JFM |
863 | out: |
864 | mutex_unlock(&gspca_dev->queue_lock); | |
865 | return ret; | |
866 | } | |
867 | ||
d0182306 | 868 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 869 | { |
d0182306 | 870 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 871 | |
d0182306 | 872 | PDEBUG(D_STREAM, "device released"); |
6b060ffe FZ |
873 | |
874 | kfree(gspca_dev->usb_buf); | |
875 | kfree(gspca_dev); | |
876 | } | |
877 | ||
bec43661 | 878 | static int dev_open(struct file *file) |
63eb9546 JFM |
879 | { |
880 | struct gspca_dev *gspca_dev; | |
881 | int ret; | |
882 | ||
d43fa32f | 883 | PDEBUG(D_STREAM, "%s open", current->comm); |
a12ca6a6 | 884 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
885 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
886 | return -ERESTARTSYS; | |
63eb9546 JFM |
887 | if (!gspca_dev->present) { |
888 | ret = -ENODEV; | |
889 | goto out; | |
890 | } | |
891 | ||
012d6b02 | 892 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
893 | ret = -EBUSY; |
894 | goto out; | |
895 | } | |
5c4fa002 JFM |
896 | |
897 | /* protect the subdriver against rmmod */ | |
898 | if (!try_module_get(gspca_dev->module)) { | |
899 | ret = -ENODEV; | |
900 | goto out; | |
901 | } | |
902 | ||
63eb9546 | 903 | gspca_dev->users++; |
6b060ffe | 904 | |
63eb9546 | 905 | file->private_data = gspca_dev; |
335b3f88 | 906 | #ifdef GSPCA_DEBUG |
63eb9546 | 907 | /* activate the v4l2 debug */ |
d43fa32f | 908 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 909 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 910 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 911 | else |
a12ca6a6 | 912 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 913 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 914 | #endif |
012d6b02 | 915 | ret = 0; |
63eb9546 JFM |
916 | out: |
917 | mutex_unlock(&gspca_dev->queue_lock); | |
918 | if (ret != 0) | |
919 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
920 | else | |
d43fa32f | 921 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
922 | return ret; |
923 | } | |
924 | ||
bec43661 | 925 | static int dev_close(struct file *file) |
63eb9546 JFM |
926 | { |
927 | struct gspca_dev *gspca_dev = file->private_data; | |
928 | ||
d43fa32f | 929 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
930 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
931 | return -ERESTARTSYS; | |
932 | gspca_dev->users--; | |
e2997a72 | 933 | |
5b77ae77 | 934 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 935 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
936 | if (gspca_dev->streaming) { |
937 | mutex_lock(&gspca_dev->usb_lock); | |
938 | gspca_stream_off(gspca_dev); | |
939 | mutex_unlock(&gspca_dev->usb_lock); | |
940 | } | |
4aa0d037 | 941 | frame_free(gspca_dev); |
efab8211 | 942 | gspca_dev->capt_file = NULL; |
d43fa32f | 943 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 944 | } |
d43fa32f | 945 | file->private_data = NULL; |
5c4fa002 | 946 | module_put(gspca_dev->module); |
63eb9546 | 947 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 948 | |
d43fa32f | 949 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 950 | |
63eb9546 JFM |
951 | return 0; |
952 | } | |
953 | ||
954 | static int vidioc_querycap(struct file *file, void *priv, | |
955 | struct v4l2_capability *cap) | |
956 | { | |
957 | struct gspca_dev *gspca_dev = priv; | |
958 | ||
63eb9546 JFM |
959 | memset(cap, 0, sizeof *cap); |
960 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
c6edaf16 JFM |
961 | if (gspca_dev->dev->product != NULL) { |
962 | strncpy(cap->card, gspca_dev->dev->product, | |
963 | sizeof cap->card); | |
964 | } else { | |
965 | snprintf(cap->card, sizeof cap->card, | |
966 | "USB Camera (%04x:%04x)", | |
967 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
968 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
969 | } | |
63eb9546 JFM |
970 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, |
971 | sizeof cap->bus_info); | |
972 | cap->version = DRIVER_VERSION_NUMBER; | |
973 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
974 | | V4L2_CAP_STREAMING | |
975 | | V4L2_CAP_READWRITE; | |
976 | return 0; | |
977 | } | |
978 | ||
979 | static int vidioc_queryctrl(struct file *file, void *priv, | |
980 | struct v4l2_queryctrl *q_ctrl) | |
981 | { | |
982 | struct gspca_dev *gspca_dev = priv; | |
f50ba1be | 983 | int i, ix; |
6a7eba24 JFM |
984 | u32 id; |
985 | ||
f50ba1be | 986 | ix = -1; |
6a7eba24 JFM |
987 | id = q_ctrl->id; |
988 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
989 | id &= V4L2_CTRL_ID_MASK; | |
990 | id++; | |
991 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
0f523c2f | 992 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be JFM |
993 | continue; |
994 | if (ix < 0) { | |
995 | ix = i; | |
996 | continue; | |
6a7eba24 | 997 | } |
f50ba1be JFM |
998 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id |
999 | > gspca_dev->sd_desc->ctrls[ix].qctrl.id) | |
1000 | continue; | |
1001 | ix = i; | |
6a7eba24 | 1002 | } |
6a7eba24 | 1003 | } |
63eb9546 | 1004 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 1005 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
f50ba1be JFM |
1006 | ix = i; |
1007 | break; | |
63eb9546 JFM |
1008 | } |
1009 | } | |
f50ba1be JFM |
1010 | if (ix < 0) |
1011 | return -EINVAL; | |
1012 | memcpy(q_ctrl, &gspca_dev->sd_desc->ctrls[ix].qctrl, | |
1013 | sizeof *q_ctrl); | |
1014 | if (gspca_dev->ctrl_dis & (1 << ix)) | |
1015 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; | |
1016 | return 0; | |
63eb9546 JFM |
1017 | } |
1018 | ||
1019 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1020 | struct v4l2_control *ctrl) | |
1021 | { | |
1022 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1023 | const struct ctrl *ctrls; |
63eb9546 JFM |
1024 | int i, ret; |
1025 | ||
63eb9546 JFM |
1026 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
1027 | i < gspca_dev->sd_desc->nctrls; | |
1028 | i++, ctrls++) { | |
1029 | if (ctrl->id != ctrls->qctrl.id) | |
1030 | continue; | |
0f523c2f HG |
1031 | if (gspca_dev->ctrl_dis & (1 << i)) |
1032 | return -EINVAL; | |
63eb9546 | 1033 | if (ctrl->value < ctrls->qctrl.minimum |
fcf5cb24 | 1034 | || ctrl->value > ctrls->qctrl.maximum) |
63eb9546 JFM |
1035 | return -ERANGE; |
1036 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
1037 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1038 | return -ERESTARTSYS; | |
63eb9546 JFM |
1039 | ret = ctrls->set(gspca_dev, ctrl->value); |
1040 | mutex_unlock(&gspca_dev->usb_lock); | |
1041 | return ret; | |
1042 | } | |
1043 | return -EINVAL; | |
1044 | } | |
1045 | ||
1046 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1047 | struct v4l2_control *ctrl) | |
1048 | { | |
1049 | struct gspca_dev *gspca_dev = priv; | |
1050 | ||
a5ae2062 | 1051 | const struct ctrl *ctrls; |
63eb9546 JFM |
1052 | int i, ret; |
1053 | ||
1054 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1055 | i < gspca_dev->sd_desc->nctrls; | |
1056 | i++, ctrls++) { | |
1057 | if (ctrl->id != ctrls->qctrl.id) | |
1058 | continue; | |
0f523c2f HG |
1059 | if (gspca_dev->ctrl_dis & (1 << i)) |
1060 | return -EINVAL; | |
e2997a72 HG |
1061 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1062 | return -ERESTARTSYS; | |
63eb9546 JFM |
1063 | ret = ctrls->get(gspca_dev, &ctrl->value); |
1064 | mutex_unlock(&gspca_dev->usb_lock); | |
1065 | return ret; | |
1066 | } | |
1067 | return -EINVAL; | |
1068 | } | |
1069 | ||
f955c4fc JFM |
1070 | /*fixme: have an audio flag in gspca_dev?*/ |
1071 | static int vidioc_s_audio(struct file *file, void *priv, | |
1072 | struct v4l2_audio *audio) | |
1073 | { | |
1074 | if (audio->index != 0) | |
1075 | return -EINVAL; | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static int vidioc_g_audio(struct file *file, void *priv, | |
1080 | struct v4l2_audio *audio) | |
1081 | { | |
1082 | memset(audio, 0, sizeof *audio); | |
1083 | strcpy(audio->name, "Microphone"); | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | static int vidioc_enumaudio(struct file *file, void *priv, | |
1088 | struct v4l2_audio *audio) | |
1089 | { | |
1090 | if (audio->index != 0) | |
1091 | return -EINVAL; | |
1092 | ||
1093 | strcpy(audio->name, "Microphone"); | |
1094 | audio->capability = 0; | |
1095 | audio->mode = 0; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
63eb9546 JFM |
1099 | static int vidioc_querymenu(struct file *file, void *priv, |
1100 | struct v4l2_querymenu *qmenu) | |
1101 | { | |
1102 | struct gspca_dev *gspca_dev = priv; | |
1103 | ||
1104 | if (!gspca_dev->sd_desc->querymenu) | |
1105 | return -EINVAL; | |
1106 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1107 | } | |
1108 | ||
1109 | static int vidioc_enum_input(struct file *file, void *priv, | |
1110 | struct v4l2_input *input) | |
1111 | { | |
1112 | struct gspca_dev *gspca_dev = priv; | |
1113 | ||
1114 | if (input->index != 0) | |
1115 | return -EINVAL; | |
1116 | memset(input, 0, sizeof *input); | |
1117 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1118 | strncpy(input->name, gspca_dev->sd_desc->name, | |
1119 | sizeof input->name); | |
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1124 | { | |
1125 | *i = 0; | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1130 | { | |
1131 | if (i > 0) | |
1132 | return -EINVAL; | |
1133 | return (0); | |
1134 | } | |
1135 | ||
1136 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1137 | struct v4l2_requestbuffers *rb) | |
1138 | { | |
1139 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1140 | int i, ret = 0; |
63eb9546 | 1141 | |
d43fa32f | 1142 | switch (rb->memory) { |
5b77ae77 | 1143 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1144 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1145 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1146 | break; |
d43fa32f | 1147 | default: |
63eb9546 | 1148 | return -EINVAL; |
d43fa32f | 1149 | } |
e2997a72 HG |
1150 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1151 | return -ERESTARTSYS; | |
d43fa32f | 1152 | |
5b77ae77 JFM |
1153 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1154 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1155 | ret = -EBUSY; |
1156 | goto out; | |
1157 | } | |
d43fa32f | 1158 | |
5b77ae77 JFM |
1159 | /* only one file may do the capture */ |
1160 | if (gspca_dev->capt_file != NULL | |
1161 | && gspca_dev->capt_file != file) { | |
1162 | ret = -EBUSY; | |
1163 | goto out; | |
1164 | } | |
1165 | ||
1166 | /* if allocated, the buffers must not be mapped */ | |
1167 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1168 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1169 | ret = -EBUSY; |
1170 | goto out; | |
1171 | } | |
5b77ae77 JFM |
1172 | } |
1173 | ||
1174 | /* stop streaming */ | |
1175 | if (gspca_dev->streaming) { | |
1176 | mutex_lock(&gspca_dev->usb_lock); | |
1177 | gspca_stream_off(gspca_dev); | |
1178 | mutex_unlock(&gspca_dev->usb_lock); | |
1179 | } | |
1180 | ||
1181 | /* free the previous allocated buffers, if any */ | |
1182 | if (gspca_dev->nframes != 0) { | |
1183 | frame_free(gspca_dev); | |
1184 | gspca_dev->capt_file = NULL; | |
1185 | } | |
1186 | if (rb->count == 0) /* unrequest */ | |
1187 | goto out; | |
1188 | gspca_dev->memory = rb->memory; | |
1189 | ret = frame_alloc(gspca_dev, rb->count); | |
1190 | if (ret == 0) { | |
1191 | rb->count = gspca_dev->nframes; | |
1192 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1193 | } |
1194 | out: | |
63eb9546 JFM |
1195 | mutex_unlock(&gspca_dev->queue_lock); |
1196 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1197 | return ret; | |
1198 | } | |
1199 | ||
1200 | static int vidioc_querybuf(struct file *file, void *priv, | |
1201 | struct v4l2_buffer *v4l2_buf) | |
1202 | { | |
1203 | struct gspca_dev *gspca_dev = priv; | |
1204 | struct gspca_frame *frame; | |
1205 | ||
13752bd9 | 1206 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1207 | || v4l2_buf->index >= gspca_dev->nframes) |
1208 | return -EINVAL; | |
1209 | ||
1210 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1211 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static int vidioc_streamon(struct file *file, void *priv, | |
1216 | enum v4l2_buf_type buf_type) | |
1217 | { | |
1218 | struct gspca_dev *gspca_dev = priv; | |
1219 | int ret; | |
1220 | ||
63eb9546 JFM |
1221 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1222 | return -EINVAL; | |
e2997a72 HG |
1223 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1224 | return -ERESTARTSYS; | |
63eb9546 JFM |
1225 | if (!gspca_dev->present) { |
1226 | ret = -ENODEV; | |
1227 | goto out; | |
1228 | } | |
1edabe71 JFM |
1229 | if (gspca_dev->nframes == 0 |
1230 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1231 | ret = -EINVAL; |
1232 | goto out; | |
1233 | } | |
1234 | if (!gspca_dev->streaming) { | |
1235 | ret = gspca_init_transfer(gspca_dev); | |
1236 | if (ret < 0) | |
1237 | goto out; | |
1238 | } | |
335b3f88 | 1239 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1240 | if (gspca_debug & D_STREAM) { |
1241 | PDEBUG_MODE("stream on OK", | |
1242 | gspca_dev->pixfmt, | |
1243 | gspca_dev->width, | |
1244 | gspca_dev->height); | |
1245 | } | |
1246 | #endif | |
e2997a72 | 1247 | ret = 0; |
63eb9546 JFM |
1248 | out: |
1249 | mutex_unlock(&gspca_dev->queue_lock); | |
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | static int vidioc_streamoff(struct file *file, void *priv, | |
1254 | enum v4l2_buf_type buf_type) | |
1255 | { | |
1256 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1257 | int i, ret; |
63eb9546 | 1258 | |
63eb9546 JFM |
1259 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1260 | return -EINVAL; | |
4aa0d037 JFM |
1261 | if (!gspca_dev->streaming) |
1262 | return 0; | |
1263 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1264 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1265 | |
1266 | /* stop streaming */ | |
4aa0d037 JFM |
1267 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1268 | ret = -ERESTARTSYS; | |
1269 | goto out; | |
63eb9546 | 1270 | } |
4aa0d037 | 1271 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1272 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1273 | |
1274 | /* empty the application queues */ | |
1275 | for (i = 0; i < gspca_dev->nframes; i++) | |
1276 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1277 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1278 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1279 | gspca_dev->sequence = 0; | |
5b77ae77 | 1280 | ret = 0; |
4aa0d037 JFM |
1281 | out: |
1282 | mutex_unlock(&gspca_dev->queue_lock); | |
1283 | return ret; | |
63eb9546 JFM |
1284 | } |
1285 | ||
1286 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1287 | struct v4l2_jpegcompression *jpegcomp) | |
1288 | { | |
1289 | struct gspca_dev *gspca_dev = priv; | |
1290 | int ret; | |
1291 | ||
1292 | if (!gspca_dev->sd_desc->get_jcomp) | |
1293 | return -EINVAL; | |
e2997a72 HG |
1294 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1295 | return -ERESTARTSYS; | |
63eb9546 JFM |
1296 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1297 | mutex_unlock(&gspca_dev->usb_lock); | |
1298 | return ret; | |
1299 | } | |
1300 | ||
1301 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1302 | struct v4l2_jpegcompression *jpegcomp) | |
1303 | { | |
1304 | struct gspca_dev *gspca_dev = priv; | |
1305 | int ret; | |
1306 | ||
63eb9546 JFM |
1307 | if (!gspca_dev->sd_desc->set_jcomp) |
1308 | return -EINVAL; | |
f86d4a91 JP |
1309 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1310 | return -ERESTARTSYS; | |
63eb9546 JFM |
1311 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); |
1312 | mutex_unlock(&gspca_dev->usb_lock); | |
1313 | return ret; | |
1314 | } | |
1315 | ||
1316 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1317 | struct v4l2_streamparm *parm) | |
1318 | { | |
1319 | struct gspca_dev *gspca_dev = priv; | |
1320 | ||
6a7eba24 | 1321 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1322 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1323 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
627a5ef7 JP |
1324 | |
1325 | if (gspca_dev->sd_desc->get_streamparm) { | |
1326 | int ret; | |
1327 | ||
1328 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1329 | return -ERESTARTSYS; | |
1330 | ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); | |
1331 | mutex_unlock(&gspca_dev->usb_lock); | |
1332 | return ret; | |
1333 | } | |
1334 | ||
63eb9546 JFM |
1335 | return 0; |
1336 | } | |
1337 | ||
1338 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1339 | struct v4l2_streamparm *parm) | |
1340 | { | |
1341 | struct gspca_dev *gspca_dev = priv; | |
1342 | int n; | |
1343 | ||
63eb9546 JFM |
1344 | n = parm->parm.capture.readbuffers; |
1345 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1346 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1347 | else | |
1348 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1349 | |
1350 | if (gspca_dev->sd_desc->set_streamparm) { | |
1351 | int ret; | |
1352 | ||
1353 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1354 | return -ERESTARTSYS; | |
1355 | ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); | |
1356 | mutex_unlock(&gspca_dev->usb_lock); | |
1357 | return ret; | |
1358 | } | |
1359 | ||
63eb9546 JFM |
1360 | return 0; |
1361 | } | |
1362 | ||
6a7eba24 JFM |
1363 | static int vidioc_s_std(struct file *filp, void *priv, |
1364 | v4l2_std_id *parm) | |
1365 | { | |
1366 | return 0; | |
1367 | } | |
1368 | ||
63eb9546 JFM |
1369 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1370 | static int vidiocgmbuf(struct file *file, void *priv, | |
1371 | struct video_mbuf *mbuf) | |
1372 | { | |
1373 | struct gspca_dev *gspca_dev = file->private_data; | |
1374 | int i; | |
1375 | ||
1376 | PDEBUG(D_STREAM, "cgmbuf"); | |
1377 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1378 | int ret; |
6a7eba24 JFM |
1379 | |
1380 | { | |
1381 | struct v4l2_format fmt; | |
1382 | ||
1383 | memset(&fmt, 0, sizeof fmt); | |
1384 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1385 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1386 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1387 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1388 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1389 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1390 | if (ret != 0) |
1391 | return ret; | |
1392 | } | |
1393 | { | |
1394 | struct v4l2_requestbuffers rb; | |
1395 | ||
1396 | memset(&rb, 0, sizeof rb); | |
1397 | rb.count = 4; | |
1398 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1399 | rb.memory = V4L2_MEMORY_MMAP; | |
1400 | ret = vidioc_reqbufs(file, priv, &rb); | |
1401 | if (ret != 0) | |
1402 | return ret; | |
1403 | } | |
63eb9546 JFM |
1404 | } |
1405 | mbuf->frames = gspca_dev->nframes; | |
1406 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1407 | for (i = 0; i < mbuf->frames; i++) | |
1408 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1409 | return 0; | |
1410 | } | |
1411 | #endif | |
1412 | ||
1413 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1414 | { | |
1415 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1416 | struct gspca_frame *frame; |
63eb9546 JFM |
1417 | struct page *page; |
1418 | unsigned long addr, start, size; | |
1419 | int i, ret; | |
63eb9546 JFM |
1420 | |
1421 | start = vma->vm_start; | |
1422 | size = vma->vm_end - vma->vm_start; | |
1423 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1424 | ||
e2997a72 HG |
1425 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1426 | return -ERESTARTSYS; | |
63eb9546 JFM |
1427 | if (!gspca_dev->present) { |
1428 | ret = -ENODEV; | |
4aa0d037 JFM |
1429 | goto out; |
1430 | } | |
1431 | if (gspca_dev->capt_file != file) { | |
1432 | ret = -EINVAL; | |
1433 | goto out; | |
63eb9546 JFM |
1434 | } |
1435 | ||
efab8211 | 1436 | frame = NULL; |
63eb9546 JFM |
1437 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1438 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1439 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1440 | break; | |
1441 | } | |
1442 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1443 | == vma->vm_pgoff) { | |
1444 | frame = &gspca_dev->frame[i]; | |
1445 | break; | |
1446 | } | |
1447 | } | |
efab8211 | 1448 | if (frame == NULL) { |
63eb9546 JFM |
1449 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1450 | ret = -EINVAL; | |
4aa0d037 | 1451 | goto out; |
63eb9546 JFM |
1452 | } |
1453 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1454 | /* v4l1 maps all the buffers */ |
1455 | if (i != 0 | |
1456 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1457 | #endif |
ac0d6df6 | 1458 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1459 | PDEBUG(D_STREAM, "mmap bad size"); |
1460 | ret = -EINVAL; | |
4aa0d037 | 1461 | goto out; |
63eb9546 JFM |
1462 | } |
1463 | ||
1464 | /* | |
1465 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1466 | * device. It also prevents the region from being core dumped. | |
1467 | */ | |
1468 | vma->vm_flags |= VM_IO; | |
1469 | ||
1470 | addr = (unsigned long) frame->data; | |
1471 | while (size > 0) { | |
1472 | page = vmalloc_to_page((void *) addr); | |
1473 | ret = vm_insert_page(vma, start, page); | |
1474 | if (ret < 0) | |
4aa0d037 | 1475 | goto out; |
63eb9546 JFM |
1476 | start += PAGE_SIZE; |
1477 | addr += PAGE_SIZE; | |
1478 | size -= PAGE_SIZE; | |
1479 | } | |
1480 | ||
1481 | vma->vm_ops = &gspca_vm_ops; | |
1482 | vma->vm_private_data = frame; | |
1483 | gspca_vm_open(vma); | |
e2997a72 | 1484 | ret = 0; |
4aa0d037 | 1485 | out: |
63eb9546 JFM |
1486 | mutex_unlock(&gspca_dev->queue_lock); |
1487 | return ret; | |
1488 | } | |
1489 | ||
63eb9546 JFM |
1490 | /* |
1491 | * wait for a video frame | |
1492 | * | |
1493 | * If a frame is ready, its index is returned. | |
1494 | */ | |
d43fa32f | 1495 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1496 | int nonblock_ing) |
1497 | { | |
1498 | struct gspca_frame *frame; | |
1499 | int i, j, ret; | |
1500 | ||
d43fa32f | 1501 | /* check if a frame is ready */ |
63eb9546 JFM |
1502 | i = gspca_dev->fr_o; |
1503 | j = gspca_dev->fr_queue[i]; | |
1504 | frame = &gspca_dev->frame[j]; | |
63eb9546 | 1505 | |
181b704f HG |
1506 | if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) { |
1507 | if (nonblock_ing) | |
1508 | return -EAGAIN; | |
1509 | ||
1510 | /* wait till a frame is ready */ | |
4aa0d037 | 1511 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
181b704f HG |
1512 | (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) || |
1513 | !gspca_dev->streaming || !gspca_dev->present, | |
1514 | msecs_to_jiffies(3000)); | |
1515 | if (ret < 0) | |
1516 | return ret; | |
1517 | if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) | |
e2997a72 | 1518 | return -EIO; |
63eb9546 | 1519 | } |
181b704f | 1520 | |
63eb9546 JFM |
1521 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1522 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1523 | gspca_dev->fr_q, | |
1524 | gspca_dev->fr_i, | |
1525 | gspca_dev->fr_o); | |
e2997a72 | 1526 | |
739570bb JFM |
1527 | if (gspca_dev->sd_desc->dq_callback) { |
1528 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1529 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1530 | mutex_unlock(&gspca_dev->usb_lock); |
1531 | } | |
63eb9546 JFM |
1532 | return j; |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * dequeue a video buffer | |
1537 | * | |
1538 | * If nonblock_ing is false, block until a buffer is available. | |
1539 | */ | |
1540 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1541 | struct v4l2_buffer *v4l2_buf) | |
1542 | { | |
1543 | struct gspca_dev *gspca_dev = priv; | |
1544 | struct gspca_frame *frame; | |
1545 | int i, ret; | |
1546 | ||
1547 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 | 1548 | if (v4l2_buf->memory != gspca_dev->memory) |
63eb9546 | 1549 | return -EINVAL; |
5b77ae77 JFM |
1550 | |
1551 | /* if not streaming, be sure the application will not loop forever */ | |
1552 | if (!(file->f_flags & O_NONBLOCK) | |
1553 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1554 | return -EINVAL; |
1555 | ||
5b77ae77 JFM |
1556 | /* only the capturing file may dequeue */ |
1557 | if (gspca_dev->capt_file != file) | |
1558 | return -EINVAL; | |
1559 | ||
1560 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1561 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1562 | return -ERESTARTSYS; | |
1563 | ||
d43fa32f | 1564 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1565 | if (ret < 0) |
4aa0d037 | 1566 | goto out; |
63eb9546 JFM |
1567 | i = ret; /* frame index */ |
1568 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1569 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1570 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1571 | frame->data, |
1572 | frame->v4l2_buf.bytesused)) { | |
1573 | PDEBUG(D_ERR|D_STREAM, | |
1574 | "dqbuf cp to user failed"); | |
1575 | ret = -EFAULT; | |
1576 | goto out; | |
1577 | } | |
1578 | } | |
63eb9546 JFM |
1579 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1580 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1581 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1582 | ret = 0; | |
4aa0d037 | 1583 | out: |
63eb9546 JFM |
1584 | mutex_unlock(&gspca_dev->read_lock); |
1585 | return ret; | |
1586 | } | |
1587 | ||
1588 | /* | |
1589 | * queue a video buffer | |
1590 | * | |
1591 | * Attempting to queue a buffer that has already been | |
1592 | * queued will return -EINVAL. | |
1593 | */ | |
1594 | static int vidioc_qbuf(struct file *file, void *priv, | |
1595 | struct v4l2_buffer *v4l2_buf) | |
1596 | { | |
1597 | struct gspca_dev *gspca_dev = priv; | |
1598 | struct gspca_frame *frame; | |
1599 | int i, index, ret; | |
1600 | ||
1601 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1602 | |
5b77ae77 JFM |
1603 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1604 | return -ERESTARTSYS; | |
1605 | ||
63eb9546 JFM |
1606 | index = v4l2_buf->index; |
1607 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1608 | PDEBUG(D_FRAM, |
63eb9546 | 1609 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1610 | ret = -EINVAL; |
1611 | goto out; | |
63eb9546 | 1612 | } |
5b77ae77 | 1613 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1614 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1615 | ret = -EINVAL; |
1616 | goto out; | |
63eb9546 | 1617 | } |
e2997a72 | 1618 | |
5b77ae77 | 1619 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1620 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1621 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1622 | ret = -EINVAL; |
1623 | goto out; | |
1624 | } | |
1625 | ||
1626 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1627 | |
d43fa32f | 1628 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1629 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1630 | frame->v4l2_buf.length = v4l2_buf->length; | |
1631 | } | |
1632 | ||
1633 | /* put the buffer in the 'queued' queue */ | |
1634 | i = gspca_dev->fr_q; | |
1635 | gspca_dev->fr_queue[i] = index; | |
1636 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1637 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1638 | gspca_dev->fr_q, | |
1639 | gspca_dev->fr_i, | |
1640 | gspca_dev->fr_o); | |
1641 | ||
1642 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1643 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1644 | ret = 0; | |
1645 | out: | |
1646 | mutex_unlock(&gspca_dev->queue_lock); | |
1647 | return ret; | |
1648 | } | |
1649 | ||
d43fa32f JFM |
1650 | /* |
1651 | * allocate the resources for read() | |
1652 | */ | |
1653 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1654 | struct file *file) | |
63eb9546 | 1655 | { |
63eb9546 | 1656 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1657 | int i, ret; |
63eb9546 | 1658 | |
d43fa32f | 1659 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1660 | if (gspca_dev->nframes == 0) { |
1661 | struct v4l2_requestbuffers rb; | |
1662 | ||
1663 | memset(&rb, 0, sizeof rb); | |
1664 | rb.count = gspca_dev->nbufread; | |
1665 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1666 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1667 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1668 | if (ret != 0) { | |
d43fa32f | 1669 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1670 | return ret; |
1671 | } | |
1672 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1673 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1674 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1675 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1676 | v4l2_buf.index = i; | |
63eb9546 JFM |
1677 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1678 | if (ret != 0) { | |
1679 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1680 | return ret; | |
1681 | } | |
1682 | } | |
d43fa32f JFM |
1683 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1684 | } | |
4aa0d037 | 1685 | |
d43fa32f JFM |
1686 | /* start streaming */ |
1687 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1688 | if (ret != 0) | |
1689 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1690 | return ret; | |
1691 | } | |
1692 | ||
1693 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1694 | { | |
1695 | struct gspca_dev *gspca_dev = file->private_data; | |
1696 | int i, ret; | |
1697 | ||
1698 | PDEBUG(D_FRAM, "poll"); | |
1699 | ||
1700 | poll_wait(file, &gspca_dev->wq, wait); | |
1701 | if (!gspca_dev->present) | |
1702 | return POLLERR; | |
1703 | ||
5b77ae77 JFM |
1704 | /* if reqbufs is not done, the user would use read() */ |
1705 | if (gspca_dev->nframes == 0) { | |
1706 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1707 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1708 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1709 | if (ret != 0) |
1710 | return POLLERR; | |
63eb9546 JFM |
1711 | } |
1712 | ||
d43fa32f JFM |
1713 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1714 | return POLLERR; | |
1715 | if (!gspca_dev->present) { | |
1716 | ret = POLLERR; | |
1717 | goto out; | |
1718 | } | |
1719 | ||
5b77ae77 | 1720 | /* check the next incoming buffer */ |
d43fa32f JFM |
1721 | i = gspca_dev->fr_o; |
1722 | i = gspca_dev->fr_queue[i]; | |
1723 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1724 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1725 | else | |
1726 | ret = 0; | |
1727 | out: | |
1728 | mutex_unlock(&gspca_dev->queue_lock); | |
1729 | return ret; | |
1730 | } | |
1731 | ||
1732 | static ssize_t dev_read(struct file *file, char __user *data, | |
1733 | size_t count, loff_t *ppos) | |
1734 | { | |
1735 | struct gspca_dev *gspca_dev = file->private_data; | |
1736 | struct gspca_frame *frame; | |
1737 | struct v4l2_buffer v4l2_buf; | |
1738 | struct timeval timestamp; | |
82643d0e | 1739 | int n, ret, ret2; |
d43fa32f | 1740 | |
a9e11134 | 1741 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1742 | if (!gspca_dev->present) |
1743 | return -ENODEV; | |
1744 | switch (gspca_dev->memory) { | |
1745 | case GSPCA_MEMORY_NO: /* first time */ | |
1746 | ret = read_alloc(gspca_dev, file); | |
1747 | if (ret != 0) | |
1748 | return ret; | |
1749 | break; | |
1750 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1751 | if (gspca_dev->capt_file == file) |
1752 | break; | |
1753 | /* fall thru */ | |
d43fa32f JFM |
1754 | default: |
1755 | return -EINVAL; | |
1756 | } | |
1757 | ||
63eb9546 JFM |
1758 | /* get a frame */ |
1759 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1760 | timestamp.tv_sec--; | |
82643d0e JFM |
1761 | n = 2; |
1762 | for (;;) { | |
63eb9546 JFM |
1763 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1764 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1765 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1766 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1767 | if (ret != 0) { | |
1768 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1769 | return ret; | |
1770 | } | |
1771 | ||
1772 | /* if the process slept for more than 1 second, | |
219423c1 | 1773 | * get a newer frame */ |
63eb9546 | 1774 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1775 | if (--n < 0) |
1776 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1777 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1778 | break; | |
1779 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1780 | if (ret != 0) { | |
1781 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1782 | return ret; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | /* copy the frame */ | |
ac0d6df6 JFM |
1787 | if (count > frame->v4l2_buf.bytesused) |
1788 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1789 | ret = copy_to_user(data, frame->data, count); |
1790 | if (ret != 0) { | |
1791 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1792 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1793 | ret = -EFAULT; |
1794 | goto out; | |
1795 | } | |
1796 | ret = count; | |
1797 | out: | |
1798 | /* in each case, requeue the buffer */ | |
1799 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1800 | if (ret2 != 0) | |
1801 | return ret2; | |
1802 | return ret; | |
1803 | } | |
1804 | ||
bec43661 | 1805 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
1806 | .owner = THIS_MODULE, |
1807 | .open = dev_open, | |
1808 | .release = dev_close, | |
1809 | .read = dev_read, | |
1810 | .mmap = dev_mmap, | |
bec43661 | 1811 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
1812 | .poll = dev_poll, |
1813 | }; | |
1814 | ||
a399810c | 1815 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1816 | .vidioc_querycap = vidioc_querycap, |
1817 | .vidioc_dqbuf = vidioc_dqbuf, | |
1818 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1819 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1820 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1821 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1822 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1823 | .vidioc_streamon = vidioc_streamon, |
1824 | .vidioc_queryctrl = vidioc_queryctrl, | |
1825 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1826 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
f955c4fc JFM |
1827 | .vidioc_g_audio = vidioc_g_audio, |
1828 | .vidioc_s_audio = vidioc_s_audio, | |
1829 | .vidioc_enumaudio = vidioc_enumaudio, | |
63eb9546 JFM |
1830 | .vidioc_querymenu = vidioc_querymenu, |
1831 | .vidioc_enum_input = vidioc_enum_input, | |
1832 | .vidioc_g_input = vidioc_g_input, | |
1833 | .vidioc_s_input = vidioc_s_input, | |
1834 | .vidioc_reqbufs = vidioc_reqbufs, | |
1835 | .vidioc_querybuf = vidioc_querybuf, | |
1836 | .vidioc_streamoff = vidioc_streamoff, | |
1837 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1838 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1839 | .vidioc_g_parm = vidioc_g_parm, | |
1840 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1841 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1842 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1843 | .vidiocgmbuf = vidiocgmbuf, | |
1844 | #endif | |
1845 | }; | |
1846 | ||
a399810c HV |
1847 | static struct video_device gspca_template = { |
1848 | .name = "gspca main driver", | |
a399810c HV |
1849 | .fops = &dev_fops, |
1850 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 1851 | .release = gspca_release, |
a399810c HV |
1852 | .minor = -1, |
1853 | }; | |
1854 | ||
63eb9546 JFM |
1855 | /* |
1856 | * probe and create a new gspca device | |
1857 | * | |
1858 | * This function must be called by the sub-driver when it is | |
1859 | * called for probing a new device. | |
1860 | */ | |
1861 | int gspca_dev_probe(struct usb_interface *intf, | |
1862 | const struct usb_device_id *id, | |
1863 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1864 | int dev_size, |
1865 | struct module *module) | |
63eb9546 JFM |
1866 | { |
1867 | struct usb_interface_descriptor *interface; | |
1868 | struct gspca_dev *gspca_dev; | |
1869 | struct usb_device *dev = interface_to_usbdev(intf); | |
1870 | int ret; | |
63eb9546 | 1871 | |
6a7eba24 | 1872 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1873 | |
1874 | /* we don't handle multi-config cameras */ | |
1875 | if (dev->descriptor.bNumConfigurations != 1) | |
1876 | return -ENODEV; | |
1877 | interface = &intf->cur_altsetting->desc; | |
1878 | if (interface->bInterfaceNumber > 0) | |
1879 | return -ENODEV; | |
1880 | ||
1881 | /* create the device */ | |
1882 | if (dev_size < sizeof *gspca_dev) | |
1883 | dev_size = sizeof *gspca_dev; | |
1884 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 1885 | if (!gspca_dev) { |
63eb9546 | 1886 | err("couldn't kzalloc gspca struct"); |
e293e599 | 1887 | return -ENOMEM; |
63eb9546 | 1888 | } |
8295d99e JFM |
1889 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
1890 | if (!gspca_dev->usb_buf) { | |
1891 | err("out of memory"); | |
e293e599 | 1892 | ret = -ENOMEM; |
8295d99e JFM |
1893 | goto out; |
1894 | } | |
63eb9546 JFM |
1895 | gspca_dev->dev = dev; |
1896 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1897 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 | 1898 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 1899 | gspca_dev->nbufread = 2; |
ff374747 | 1900 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 1901 | |
012d6b02 | 1902 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 1903 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
1904 | if (ret < 0) |
1905 | goto out; | |
ba38ee8e | 1906 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
1907 | if (ret < 0) |
1908 | goto out; | |
1909 | ret = gspca_set_alt0(gspca_dev); | |
1910 | if (ret < 0) | |
1911 | goto out; | |
1912 | gspca_set_default_mode(gspca_dev); | |
1913 | ||
1914 | mutex_init(&gspca_dev->usb_lock); | |
1915 | mutex_init(&gspca_dev->read_lock); | |
1916 | mutex_init(&gspca_dev->queue_lock); | |
1917 | init_waitqueue_head(&gspca_dev->wq); | |
1918 | ||
1919 | /* init video stuff */ | |
ba38ee8e JFM |
1920 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
1921 | gspca_dev->vdev.parent = &dev->dev; | |
5c4fa002 | 1922 | gspca_dev->module = module; |
ee56a4d3 | 1923 | gspca_dev->present = 1; |
a12ca6a6 | 1924 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 JFM |
1925 | VFL_TYPE_GRABBER, |
1926 | video_nr); | |
1927 | if (ret < 0) { | |
1928 | err("video_register_device err %d", ret); | |
1929 | goto out; | |
1930 | } | |
1931 | ||
63eb9546 JFM |
1932 | usb_set_intfdata(intf, gspca_dev); |
1933 | PDEBUG(D_PROBE, "probe ok"); | |
1934 | return 0; | |
1935 | out: | |
e07a1d8a JFM |
1936 | kfree(gspca_dev->usb_buf); |
1937 | kfree(gspca_dev); | |
63eb9546 JFM |
1938 | return ret; |
1939 | } | |
1940 | EXPORT_SYMBOL(gspca_dev_probe); | |
1941 | ||
1942 | /* | |
1943 | * USB disconnection | |
1944 | * | |
1945 | * This function must be called by the sub-driver | |
1946 | * when the device disconnects, after the specific resources are freed. | |
1947 | */ | |
1948 | void gspca_disconnect(struct usb_interface *intf) | |
1949 | { | |
4aa0d037 | 1950 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 1951 | |
6e4ae872 JFM |
1952 | gspca_dev->present = 0; |
1953 | gspca_dev->streaming = 0; | |
1954 | ||
6b060ffe FZ |
1955 | usb_set_intfdata(intf, NULL); |
1956 | ||
a12ca6a6 JFM |
1957 | /* release the device */ |
1958 | /* (this will call gspca_release() immediatly or on last close) */ | |
1959 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 1960 | |
63eb9546 JFM |
1961 | PDEBUG(D_PROBE, "disconnect complete"); |
1962 | } | |
1963 | EXPORT_SYMBOL(gspca_disconnect); | |
1964 | ||
6a709749 JFM |
1965 | #ifdef CONFIG_PM |
1966 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
1967 | { | |
1968 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1969 | ||
1970 | if (!gspca_dev->streaming) | |
1971 | return 0; | |
1972 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
1973 | if (gspca_dev->sd_desc->stopN) |
1974 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
1975 | destroy_urbs(gspca_dev); |
1976 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
1977 | if (gspca_dev->sd_desc->stop0) |
1978 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
1979 | return 0; |
1980 | } | |
1981 | EXPORT_SYMBOL(gspca_suspend); | |
1982 | ||
1983 | int gspca_resume(struct usb_interface *intf) | |
1984 | { | |
1985 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1986 | ||
1987 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
1988 | gspca_dev->sd_desc->init(gspca_dev); |
1989 | if (gspca_dev->streaming) | |
1990 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 1991 | return 0; |
6a709749 JFM |
1992 | } |
1993 | EXPORT_SYMBOL(gspca_resume); | |
1994 | #endif | |
dcef3237 HG |
1995 | /* -- cam driver utility functions -- */ |
1996 | ||
1997 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1998 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1999 | ||
2000 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2001 | where changed. */ | |
2002 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2003 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2004 | { | |
2005 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2006 | const struct ctrl *gain_ctrl = NULL; | |
2007 | const struct ctrl *exposure_ctrl = NULL; | |
2008 | const struct ctrl *autogain_ctrl = NULL; | |
2009 | int retval = 0; | |
2010 | ||
2011 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
2012 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
2013 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2014 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2015 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2016 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2017 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2018 | } | |
2019 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2020 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2021 | "on cam without (auto)gain/exposure"); | |
2022 | return 0; | |
2023 | } | |
2024 | ||
2025 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2026 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2027 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2028 | return 0; | |
2029 | ||
2030 | orig_gain = gain; | |
2031 | orig_exposure = exposure; | |
2032 | ||
2033 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2034 | desired lumination fast (with the risc of a slight overshoot) */ | |
2035 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2036 | ||
1c44d81d | 2037 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2038 | avg_lum, desired_avg_lum, steps); |
2039 | ||
2040 | for (i = 0; i < steps; i++) { | |
2041 | if (avg_lum > desired_avg_lum) { | |
2042 | if (gain > gain_knee) | |
2043 | gain--; | |
2044 | else if (exposure > exposure_knee) | |
2045 | exposure--; | |
2046 | else if (gain > gain_ctrl->qctrl.default_value) | |
2047 | gain--; | |
2048 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2049 | exposure--; | |
2050 | else if (gain > gain_ctrl->qctrl.minimum) | |
2051 | gain--; | |
2052 | else | |
2053 | break; | |
2054 | } else { | |
2055 | if (gain < gain_ctrl->qctrl.default_value) | |
2056 | gain++; | |
2057 | else if (exposure < exposure_knee) | |
2058 | exposure++; | |
2059 | else if (gain < gain_knee) | |
2060 | gain++; | |
2061 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2062 | exposure++; | |
2063 | else if (gain < gain_ctrl->qctrl.maximum) | |
2064 | gain++; | |
2065 | else | |
2066 | break; | |
2067 | } | |
2068 | } | |
2069 | ||
2070 | if (gain != orig_gain) { | |
2071 | gain_ctrl->set(gspca_dev, gain); | |
2072 | retval = 1; | |
2073 | } | |
2074 | if (exposure != orig_exposure) { | |
2075 | exposure_ctrl->set(gspca_dev, exposure); | |
2076 | retval = 1; | |
2077 | } | |
2078 | ||
2079 | return retval; | |
2080 | } | |
2081 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2082 | ||
63eb9546 JFM |
2083 | /* -- module insert / remove -- */ |
2084 | static int __init gspca_init(void) | |
2085 | { | |
bb64e86c JFM |
2086 | info("main v%d.%d.%d registered", |
2087 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2088 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2089 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2090 | return 0; |
2091 | } | |
2092 | static void __exit gspca_exit(void) | |
2093 | { | |
2094 | info("main deregistered"); | |
2095 | } | |
2096 | ||
2097 | module_init(gspca_init); | |
2098 | module_exit(gspca_exit); | |
2099 | ||
335b3f88 | 2100 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2101 | module_param_named(debug, gspca_debug, int, 0644); |
2102 | MODULE_PARM_DESC(debug, | |
2103 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2104 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2105 | " 0x0100: v4l2"); | |
6a7eba24 | 2106 | #endif |