Commit | Line | Data |
---|---|---|
63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
4 | * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #define MODULE_NAME "gspca" | |
22 | ||
23 | #include <linux/init.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/pagemap.h> | |
956e42d2 | 31 | #include <linux/io.h> |
6b060ffe | 32 | #include <linux/kref.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 | ||
3371bcc3 | 47 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 3, 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; | |
6a7eba24 JFM |
152 | if (len == 0) |
153 | continue; | |
63eb9546 JFM |
154 | st = urb->iso_frame_desc[i].status; |
155 | if (st) { | |
6a7eba24 JFM |
156 | PDEBUG(D_ERR, |
157 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
158 | i, len, st); |
159 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
160 | continue; | |
161 | } | |
63eb9546 JFM |
162 | |
163 | /* let the packet be analyzed by the subdriver */ | |
164 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
165 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 166 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
167 | + urb->iso_frame_desc[i].offset; |
168 | pkt_scan(gspca_dev, frame, data, len); | |
169 | } | |
170 | ||
171 | /* resubmit the URB */ | |
172 | urb->status = 0; | |
173 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
174 | if (st < 0) | |
175 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
176 | } | |
177 | ||
d43fa32f JFM |
178 | /* |
179 | * ISOC message interrupt from the USB device | |
180 | * | |
ac0d6df6 | 181 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 182 | */ |
ac0d6df6 | 183 | static void isoc_irq(struct urb *urb |
6a7eba24 | 184 | ) |
d43fa32f JFM |
185 | { |
186 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
187 | ||
3647fea8 | 188 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
189 | if (!gspca_dev->streaming) |
190 | return; | |
191 | fill_frame(gspca_dev, urb); | |
192 | } | |
193 | ||
0be01004 JFM |
194 | /* |
195 | * bulk message interrupt from the USB device | |
196 | */ | |
197 | static void bulk_irq(struct urb *urb | |
198 | ) | |
199 | { | |
200 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
201 | struct gspca_frame *frame; | |
0be01004 JFM |
202 | |
203 | PDEBUG(D_PACK, "bulk irq"); | |
204 | if (!gspca_dev->streaming) | |
205 | return; | |
206 | if (urb->status != 0 && urb->status != -ECONNRESET) { | |
207 | #ifdef CONFIG_PM | |
208 | if (!gspca_dev->frozen) | |
209 | #endif | |
210 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
211 | return; /* disconnection ? */ | |
212 | } | |
213 | ||
214 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
215 | frame = gspca_get_i_frame(gspca_dev); |
216 | if (!frame) { | |
0be01004 JFM |
217 | gspca_dev->last_packet_type = DISCARD_PACKET; |
218 | } else { | |
219 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); | |
220 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
221 | frame, | |
222 | urb->transfer_buffer, | |
223 | urb->actual_length); | |
224 | } | |
0be01004 JFM |
225 | } |
226 | ||
63eb9546 JFM |
227 | /* |
228 | * add data to the current frame | |
229 | * | |
ac0d6df6 JFM |
230 | * This function is called by the subdrivers at interrupt level. |
231 | * | |
63eb9546 JFM |
232 | * To build a frame, these ones must add |
233 | * - one FIRST_PACKET | |
234 | * - 0 or many INTER_PACKETs | |
235 | * - one LAST_PACKET | |
236 | * DISCARD_PACKET invalidates the whole frame. | |
237 | * On LAST_PACKET, a new frame is returned. | |
238 | */ | |
239 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
240 | int packet_type, | |
241 | struct gspca_frame *frame, | |
a5ae2062 | 242 | const __u8 *data, |
63eb9546 JFM |
243 | int len) |
244 | { | |
245 | int i, j; | |
246 | ||
e2997a72 | 247 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
248 | |
249 | /* when start of a new frame, if the current frame buffer | |
250 | * is not queued, discard the whole frame */ | |
251 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
252 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
253 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
254 | gspca_dev->last_packet_type = DISCARD_PACKET; |
255 | return frame; | |
256 | } | |
257 | frame->data_end = frame->data; | |
258 | jiffies_to_timeval(get_jiffies_64(), | |
259 | &frame->v4l2_buf.timestamp); | |
260 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 261 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
262 | if (packet_type == LAST_PACKET) |
263 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 264 | return frame; |
d43fa32f | 265 | } |
63eb9546 | 266 | |
d43fa32f | 267 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
268 | if (len > 0) { |
269 | if (frame->data_end - frame->data + len | |
270 | > frame->v4l2_buf.length) { | |
a9e11134 | 271 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
272 | frame->data_end - frame->data + len, |
273 | frame->v4l2_buf.length); | |
274 | packet_type = DISCARD_PACKET; | |
275 | } else { | |
ac0d6df6 | 276 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
277 | frame->data_end += len; |
278 | } | |
279 | } | |
280 | gspca_dev->last_packet_type = packet_type; | |
281 | ||
219423c1 | 282 | /* if last packet, wake up the application and advance in the queue */ |
63eb9546 JFM |
283 | if (packet_type == LAST_PACKET) { |
284 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
285 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
286 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
287 | atomic_inc(&gspca_dev->nevent); | |
288 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
289 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
290 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
291 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
292 | frame->v4l2_buf.bytesused, | |
293 | gspca_dev->fr_q, | |
294 | i, | |
295 | gspca_dev->fr_o); | |
296 | j = gspca_dev->fr_queue[i]; | |
297 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
298 | } |
299 | return frame; | |
300 | } | |
301 | EXPORT_SYMBOL(gspca_frame_add); | |
302 | ||
303 | static int gspca_is_compressed(__u32 format) | |
304 | { | |
305 | switch (format) { | |
306 | case V4L2_PIX_FMT_MJPEG: | |
307 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 308 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 309 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
310 | return 1; |
311 | } | |
312 | return 0; | |
313 | } | |
314 | ||
315 | static void *rvmalloc(unsigned long size) | |
316 | { | |
317 | void *mem; | |
318 | unsigned long adr; | |
319 | ||
d43fa32f | 320 | /* size = PAGE_ALIGN(size); (already done) */ |
63eb9546 | 321 | mem = vmalloc_32(size); |
efab8211 | 322 | if (mem != NULL) { |
63eb9546 JFM |
323 | adr = (unsigned long) mem; |
324 | while ((long) size > 0) { | |
325 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
326 | adr += PAGE_SIZE; | |
327 | size -= PAGE_SIZE; | |
328 | } | |
329 | } | |
330 | return mem; | |
331 | } | |
332 | ||
ac0d6df6 | 333 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
334 | { |
335 | unsigned long adr; | |
336 | ||
63eb9546 | 337 | adr = (unsigned long) mem; |
ac0d6df6 | 338 | while (size > 0) { |
63eb9546 JFM |
339 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
340 | adr += PAGE_SIZE; | |
341 | size -= PAGE_SIZE; | |
342 | } | |
343 | vfree(mem); | |
344 | } | |
345 | ||
346 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 347 | unsigned int count) |
63eb9546 | 348 | { |
d43fa32f JFM |
349 | struct gspca_frame *frame; |
350 | unsigned int frsz; | |
351 | int i; | |
63eb9546 | 352 | |
c2446b3e JFM |
353 | i = gspca_dev->curr_mode; |
354 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 355 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 356 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 357 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
358 | if (count > GSPCA_MAX_FRAMES) |
359 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
360 | gspca_dev->frbuf = rvmalloc(frsz * count); |
361 | if (!gspca_dev->frbuf) { | |
362 | err("frame alloc failed"); | |
363 | return -ENOMEM; | |
63eb9546 JFM |
364 | } |
365 | gspca_dev->nframes = count; | |
366 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
367 | frame = &gspca_dev->frame[i]; |
368 | frame->v4l2_buf.index = i; | |
369 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
370 | frame->v4l2_buf.flags = 0; | |
371 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
372 | frame->v4l2_buf.length = frsz; | |
373 | frame->v4l2_buf.memory = gspca_dev->memory; | |
374 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 375 | frame->data = frame->data_end = |
d43fa32f | 376 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 377 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
378 | } |
379 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
380 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
381 | gspca_dev->sequence = 0; | |
382 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 383 | return 0; |
63eb9546 JFM |
384 | } |
385 | ||
386 | static void frame_free(struct gspca_dev *gspca_dev) | |
387 | { | |
388 | int i; | |
389 | ||
390 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 391 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
392 | rvfree(gspca_dev->frbuf, |
393 | gspca_dev->nframes * gspca_dev->frsz); | |
394 | gspca_dev->frbuf = NULL; | |
395 | for (i = 0; i < gspca_dev->nframes; i++) | |
396 | gspca_dev->frame[i].data = NULL; | |
397 | } | |
398 | gspca_dev->nframes = 0; | |
399 | } | |
400 | ||
d43fa32f | 401 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
402 | { |
403 | struct urb *urb; | |
404 | unsigned int i; | |
405 | ||
406 | PDEBUG(D_STREAM, "kill transfer"); | |
d43fa32f | 407 | for (i = 0; i < MAX_NURBS; ++i) { |
4aa0d037 | 408 | urb = gspca_dev->urb[i]; |
63eb9546 | 409 | if (urb == NULL) |
d43fa32f | 410 | break; |
63eb9546 | 411 | |
4aa0d037 | 412 | gspca_dev->urb[i] = NULL; |
63eb9546 | 413 | usb_kill_urb(urb); |
efab8211 | 414 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
415 | usb_buffer_free(gspca_dev->dev, |
416 | urb->transfer_buffer_length, | |
4aa0d037 | 417 | urb->transfer_buffer, |
63eb9546 | 418 | urb->transfer_dma); |
63eb9546 JFM |
419 | usb_free_urb(urb); |
420 | } | |
63eb9546 JFM |
421 | } |
422 | ||
423 | /* | |
219423c1 | 424 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 425 | */ |
0be01004 JFM |
426 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
427 | __u8 epaddr, | |
428 | __u8 xfer) | |
63eb9546 JFM |
429 | { |
430 | struct usb_host_endpoint *ep; | |
431 | int i, attr; | |
432 | ||
433 | epaddr |= USB_DIR_IN; | |
434 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
435 | ep = &alt->endpoint[i]; | |
436 | if (ep->desc.bEndpointAddress == epaddr) { | |
437 | attr = ep->desc.bmAttributes | |
438 | & USB_ENDPOINT_XFERTYPE_MASK; | |
0be01004 | 439 | if (attr == xfer) |
63eb9546 JFM |
440 | return ep; |
441 | break; | |
442 | } | |
443 | } | |
444 | return NULL; | |
445 | } | |
446 | ||
447 | /* | |
219423c1 | 448 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
449 | * |
450 | * The endpoint is defined by the subdriver. | |
451 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
452 | * This routine may be called many times when the bandwidth is too small | |
453 | * (the bandwidth is checked on urb submit). | |
454 | */ | |
0be01004 | 455 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
456 | { |
457 | struct usb_interface *intf; | |
458 | struct usb_host_endpoint *ep; | |
459 | int i, ret; | |
460 | ||
461 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 462 | ep = NULL; |
63eb9546 JFM |
463 | i = gspca_dev->alt; /* previous alt setting */ |
464 | while (--i > 0) { /* alt 0 is unusable */ | |
0be01004 JFM |
465 | ep = alt_xfer(&intf->altsetting[i], |
466 | gspca_dev->cam.epaddr, | |
467 | gspca_dev->bulk | |
468 | ? USB_ENDPOINT_XFER_BULK | |
469 | : USB_ENDPOINT_XFER_ISOC); | |
63eb9546 JFM |
470 | if (ep) |
471 | break; | |
472 | } | |
6a7eba24 | 473 | if (ep == NULL) { |
0be01004 | 474 | err("no transfer endpoint found"); |
63eb9546 JFM |
475 | return NULL; |
476 | } | |
0be01004 | 477 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 JFM |
478 | i, ep->desc.bEndpointAddress); |
479 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
480 | if (ret < 0) { | |
481 | err("set interface err %d", ret); | |
482 | return NULL; | |
483 | } | |
d43fa32f | 484 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
485 | return ep; |
486 | } | |
487 | ||
488 | /* | |
0be01004 | 489 | * create the URBs for image transfer |
63eb9546 JFM |
490 | */ |
491 | static int create_urbs(struct gspca_dev *gspca_dev, | |
492 | struct usb_host_endpoint *ep) | |
493 | { | |
494 | struct urb *urb; | |
d43fa32f | 495 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
496 | |
497 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 498 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 499 | |
63eb9546 JFM |
500 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
501 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
0be01004 JFM |
502 | if (!gspca_dev->bulk) { |
503 | npkt = ISO_MAX_SIZE / psize; | |
504 | if (npkt > ISO_MAX_PKT) | |
505 | npkt = ISO_MAX_PKT; | |
506 | bsize = psize * npkt; | |
507 | PDEBUG(D_STREAM, | |
508 | "isoc %d pkts size %d = bsize:%d", | |
509 | npkt, psize, bsize); | |
51977a8d | 510 | nurbs = DEF_NURBS; |
0be01004 JFM |
511 | } else { |
512 | npkt = 0; | |
513 | bsize = psize; | |
514 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); | |
51977a8d | 515 | nurbs = 1; |
0be01004 JFM |
516 | } |
517 | ||
6a7eba24 | 518 | gspca_dev->nurbs = nurbs; |
d43fa32f | 519 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
520 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
521 | if (!urb) { | |
522 | err("usb_alloc_urb failed"); | |
0d0548e6 | 523 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
524 | return -ENOMEM; |
525 | } | |
4aa0d037 | 526 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
527 | bsize, |
528 | GFP_KERNEL, | |
529 | &urb->transfer_dma); | |
530 | ||
4aa0d037 | 531 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 532 | usb_free_urb(urb); |
63eb9546 | 533 | err("usb_buffer_urb failed"); |
0d0548e6 | 534 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
535 | return -ENOMEM; |
536 | } | |
4aa0d037 | 537 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
538 | urb->dev = gspca_dev->dev; |
539 | urb->context = gspca_dev; | |
63eb9546 | 540 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
541 | if (npkt != 0) { /* ISOC */ |
542 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
543 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
544 | urb->transfer_flags = URB_ISO_ASAP |
545 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
546 | urb->interval = ep->desc.bInterval; |
547 | urb->complete = isoc_irq; | |
548 | urb->number_of_packets = npkt; | |
549 | for (i = 0; i < npkt; i++) { | |
550 | urb->iso_frame_desc[i].length = psize; | |
551 | urb->iso_frame_desc[i].offset = psize * i; | |
552 | } | |
553 | } else { /* bulk */ | |
554 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
555 | ep->desc.bEndpointAddress), | |
6c49da7f | 556 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 557 | urb->complete = bulk_irq; |
63eb9546 JFM |
558 | } |
559 | } | |
560 | return 0; | |
561 | } | |
562 | ||
563 | /* | |
564 | * start the USB transfer | |
565 | */ | |
566 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
567 | { | |
63eb9546 JFM |
568 | struct usb_host_endpoint *ep; |
569 | int n, ret; | |
570 | ||
e2997a72 HG |
571 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
572 | return -ERESTARTSYS; | |
63eb9546 | 573 | |
d43fa32f JFM |
574 | /* set the higher alternate setting and |
575 | * loop until urb submit succeeds */ | |
576 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 577 | for (;;) { |
d43fa32f | 578 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
0be01004 | 579 | ep = get_ep(gspca_dev); |
63eb9546 JFM |
580 | if (ep == NULL) { |
581 | ret = -EIO; | |
582 | goto out; | |
583 | } | |
584 | ret = create_urbs(gspca_dev, ep); | |
585 | if (ret < 0) | |
586 | goto out; | |
587 | ||
588 | /* start the cam */ | |
72ab97ce JFM |
589 | ret = gspca_dev->sd_desc->start(gspca_dev); |
590 | if (ret < 0) { | |
591 | destroy_urbs(gspca_dev); | |
592 | goto out; | |
593 | } | |
63eb9546 JFM |
594 | gspca_dev->streaming = 1; |
595 | atomic_set(&gspca_dev->nevent, 0); | |
596 | ||
219423c1 | 597 | /* bulk transfers are started by the subdriver */ |
51977a8d JFM |
598 | if (gspca_dev->bulk) |
599 | break; | |
600 | ||
63eb9546 | 601 | /* submit the URBs */ |
d43fa32f | 602 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 603 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
604 | if (ret < 0) { |
605 | PDEBUG(D_ERR|D_STREAM, | |
606 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 607 | gspca_dev->streaming = 0; |
d43fa32f | 608 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
609 | if (ret == -ENOSPC) |
610 | break; /* try the previous alt */ | |
611 | goto out; | |
612 | } | |
613 | } | |
614 | if (ret >= 0) | |
615 | break; | |
616 | } | |
617 | out: | |
618 | mutex_unlock(&gspca_dev->usb_lock); | |
619 | return ret; | |
620 | } | |
621 | ||
622 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
623 | { | |
624 | int ret; | |
625 | ||
626 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
627 | if (ret < 0) | |
628 | PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret); | |
629 | return ret; | |
630 | } | |
631 | ||
219423c1 | 632 | /* Note: both the queue and the usb locks should be held when calling this */ |
63eb9546 JFM |
633 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
634 | { | |
63eb9546 | 635 | gspca_dev->streaming = 0; |
d43fa32f | 636 | atomic_set(&gspca_dev->nevent, 0); |
63eb9546 | 637 | if (gspca_dev->present) { |
012d6b02 JFM |
638 | if (gspca_dev->sd_desc->stopN) |
639 | gspca_dev->sd_desc->stopN(gspca_dev); | |
d43fa32f | 640 | destroy_urbs(gspca_dev); |
63eb9546 | 641 | gspca_set_alt0(gspca_dev); |
012d6b02 JFM |
642 | if (gspca_dev->sd_desc->stop0) |
643 | gspca_dev->sd_desc->stop0(gspca_dev); | |
63eb9546 | 644 | PDEBUG(D_STREAM, "stream off OK"); |
63eb9546 | 645 | } |
63eb9546 JFM |
646 | } |
647 | ||
d43fa32f | 648 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
649 | { |
650 | int i; | |
651 | ||
652 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
653 | gspca_dev->curr_mode = i; | |
654 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
655 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 656 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
657 | } |
658 | ||
659 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
660 | int width, int height) | |
661 | { | |
662 | int i; | |
663 | ||
d43fa32f JFM |
664 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
665 | if (width >= gspca_dev->cam.cam_mode[i].width | |
666 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
667 | break; |
668 | } | |
63eb9546 JFM |
669 | return i; |
670 | } | |
671 | ||
63eb9546 JFM |
672 | /* |
673 | * search a mode with the right pixel format | |
674 | */ | |
675 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
676 | int mode, | |
677 | int pixfmt) | |
678 | { | |
679 | int modeU, modeD; | |
680 | ||
681 | modeU = modeD = mode; | |
682 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
683 | if (--modeD >= 0) { | |
c2446b3e JFM |
684 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
685 | == pixfmt) | |
63eb9546 JFM |
686 | return modeD; |
687 | } | |
688 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
689 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
690 | == pixfmt) | |
63eb9546 JFM |
691 | return modeU; |
692 | } | |
693 | } | |
694 | return -EINVAL; | |
695 | } | |
696 | ||
e078770a | 697 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
698 | struct v4l2_fmtdesc *fmtdesc) |
699 | { | |
700 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 701 | int i, j, index; |
63eb9546 JFM |
702 | __u32 fmt_tb[8]; |
703 | ||
63eb9546 JFM |
704 | /* give an index to each format */ |
705 | index = 0; | |
706 | j = 0; | |
707 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 708 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
709 | j = 0; |
710 | for (;;) { | |
711 | if (fmt_tb[j] == fmt_tb[index]) | |
712 | break; | |
713 | j++; | |
714 | } | |
715 | if (j == index) { | |
716 | if (fmtdesc->index == index) | |
717 | break; /* new format */ | |
718 | index++; | |
719 | if (index >= sizeof fmt_tb / sizeof fmt_tb[0]) | |
720 | return -EINVAL; | |
721 | } | |
722 | } | |
723 | if (i < 0) | |
724 | return -EINVAL; /* no more format */ | |
725 | ||
63eb9546 JFM |
726 | fmtdesc->pixelformat = fmt_tb[index]; |
727 | if (gspca_is_compressed(fmt_tb[index])) | |
728 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 729 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
730 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
731 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
732 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
733 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
734 | fmtdesc->description[4] = '\0'; | |
735 | return 0; | |
736 | } | |
737 | ||
e078770a | 738 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
739 | struct v4l2_format *fmt) |
740 | { | |
741 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 742 | int mode; |
63eb9546 | 743 | |
6a7eba24 JFM |
744 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
745 | return -EINVAL; | |
c2446b3e JFM |
746 | mode = gspca_dev->curr_mode; |
747 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
748 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
749 | return 0; |
750 | } | |
751 | ||
e078770a | 752 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
753 | struct v4l2_format *fmt) |
754 | { | |
24c530b4 | 755 | int w, h, mode, mode2; |
63eb9546 | 756 | |
6a7eba24 JFM |
757 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
758 | return -EINVAL; | |
4aa0d037 JFM |
759 | w = fmt->fmt.pix.width; |
760 | h = fmt->fmt.pix.height; | |
d43fa32f | 761 | |
335b3f88 | 762 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
763 | if (gspca_debug & D_CONF) |
764 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
765 | #endif | |
766 | /* search the closest mode for width and height */ | |
767 | mode = wxh_to_mode(gspca_dev, w, h); | |
768 | ||
769 | /* OK if right palette */ | |
c2446b3e JFM |
770 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
771 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
772 | |
773 | /* else, search the closest mode with the same pixel format */ | |
774 | mode2 = gspca_get_mode(gspca_dev, mode, | |
775 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 776 | if (mode2 >= 0) |
63eb9546 | 777 | mode = mode2; |
c2446b3e JFM |
778 | /* else |
779 | ; * no chance, return this mode */ | |
63eb9546 | 780 | } |
c2446b3e JFM |
781 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
782 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
783 | return mode; /* used when s_fmt */ |
784 | } | |
785 | ||
e078770a | 786 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
787 | void *priv, |
788 | struct v4l2_format *fmt) | |
789 | { | |
4aa0d037 | 790 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
791 | int ret; |
792 | ||
e078770a | 793 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
794 | if (ret < 0) |
795 | return ret; | |
796 | return 0; | |
797 | } | |
798 | ||
e078770a | 799 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
800 | struct v4l2_format *fmt) |
801 | { | |
802 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 803 | int ret; |
63eb9546 | 804 | |
e2997a72 HG |
805 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
806 | return -ERESTARTSYS; | |
d43fa32f | 807 | |
e078770a | 808 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
809 | if (ret < 0) |
810 | goto out; | |
811 | ||
d43fa32f JFM |
812 | if (gspca_dev->nframes != 0 |
813 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
814 | ret = -EINVAL; | |
815 | goto out; | |
816 | } | |
817 | ||
50a871fe JFM |
818 | if (ret == gspca_dev->curr_mode) { |
819 | ret = 0; | |
63eb9546 | 820 | goto out; /* same mode */ |
50a871fe | 821 | } |
d43fa32f JFM |
822 | |
823 | if (gspca_dev->streaming) { | |
824 | ret = -EBUSY; | |
825 | goto out; | |
e2997a72 | 826 | } |
4aa0d037 JFM |
827 | gspca_dev->width = fmt->fmt.pix.width; |
828 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
829 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
830 | gspca_dev->curr_mode = ret; | |
d43fa32f | 831 | |
d43fa32f | 832 | ret = 0; |
63eb9546 JFM |
833 | out: |
834 | mutex_unlock(&gspca_dev->queue_lock); | |
835 | return ret; | |
836 | } | |
837 | ||
6b060ffe FZ |
838 | static void gspca_delete(struct kref *kref) |
839 | { | |
840 | struct gspca_dev *gspca_dev = container_of(kref, struct gspca_dev, kref); | |
841 | ||
842 | PDEBUG(D_STREAM, "device deleted"); | |
843 | ||
844 | kfree(gspca_dev->usb_buf); | |
845 | kfree(gspca_dev); | |
846 | } | |
847 | ||
63eb9546 JFM |
848 | static int dev_open(struct inode *inode, struct file *file) |
849 | { | |
850 | struct gspca_dev *gspca_dev; | |
851 | int ret; | |
852 | ||
d43fa32f | 853 | PDEBUG(D_STREAM, "%s open", current->comm); |
63eb9546 | 854 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
855 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
856 | return -ERESTARTSYS; | |
63eb9546 JFM |
857 | if (!gspca_dev->present) { |
858 | ret = -ENODEV; | |
859 | goto out; | |
860 | } | |
861 | ||
012d6b02 | 862 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
863 | ret = -EBUSY; |
864 | goto out; | |
865 | } | |
866 | gspca_dev->users++; | |
6b060ffe FZ |
867 | |
868 | /* one more user */ | |
869 | kref_get(&gspca_dev->kref); | |
870 | ||
63eb9546 | 871 | file->private_data = gspca_dev; |
335b3f88 | 872 | #ifdef GSPCA_DEBUG |
63eb9546 | 873 | /* activate the v4l2 debug */ |
d43fa32f | 874 | if (gspca_debug & D_V4L2) |
9de436cf FZ |
875 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
876 | | V4L2_DEBUG_IOCTL_ARG; | |
63eb9546 | 877 | else |
9de436cf FZ |
878 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
879 | | V4L2_DEBUG_IOCTL_ARG); | |
63eb9546 | 880 | #endif |
012d6b02 | 881 | ret = 0; |
63eb9546 JFM |
882 | out: |
883 | mutex_unlock(&gspca_dev->queue_lock); | |
884 | if (ret != 0) | |
885 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
886 | else | |
d43fa32f | 887 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
888 | return ret; |
889 | } | |
890 | ||
891 | static int dev_close(struct inode *inode, struct file *file) | |
892 | { | |
893 | struct gspca_dev *gspca_dev = file->private_data; | |
894 | ||
d43fa32f | 895 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
896 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
897 | return -ERESTARTSYS; | |
898 | gspca_dev->users--; | |
e2997a72 | 899 | |
5b77ae77 | 900 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 901 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
902 | if (gspca_dev->streaming) { |
903 | mutex_lock(&gspca_dev->usb_lock); | |
904 | gspca_stream_off(gspca_dev); | |
905 | mutex_unlock(&gspca_dev->usb_lock); | |
906 | } | |
4aa0d037 | 907 | frame_free(gspca_dev); |
efab8211 | 908 | gspca_dev->capt_file = NULL; |
d43fa32f | 909 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 910 | } |
d43fa32f | 911 | file->private_data = NULL; |
63eb9546 | 912 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 913 | |
d43fa32f | 914 | PDEBUG(D_STREAM, "close done"); |
6b060ffe FZ |
915 | |
916 | kref_put(&gspca_dev->kref, gspca_delete); | |
917 | ||
63eb9546 JFM |
918 | return 0; |
919 | } | |
920 | ||
921 | static int vidioc_querycap(struct file *file, void *priv, | |
922 | struct v4l2_capability *cap) | |
923 | { | |
924 | struct gspca_dev *gspca_dev = priv; | |
925 | ||
63eb9546 JFM |
926 | memset(cap, 0, sizeof *cap); |
927 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
c6edaf16 JFM |
928 | /* strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card); */ |
929 | if (gspca_dev->dev->product != NULL) { | |
930 | strncpy(cap->card, gspca_dev->dev->product, | |
931 | sizeof cap->card); | |
932 | } else { | |
933 | snprintf(cap->card, sizeof cap->card, | |
934 | "USB Camera (%04x:%04x)", | |
935 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
936 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
937 | } | |
63eb9546 JFM |
938 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, |
939 | sizeof cap->bus_info); | |
940 | cap->version = DRIVER_VERSION_NUMBER; | |
941 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
942 | | V4L2_CAP_STREAMING | |
943 | | V4L2_CAP_READWRITE; | |
944 | return 0; | |
945 | } | |
946 | ||
947 | static int vidioc_queryctrl(struct file *file, void *priv, | |
948 | struct v4l2_queryctrl *q_ctrl) | |
949 | { | |
950 | struct gspca_dev *gspca_dev = priv; | |
f50ba1be | 951 | int i, ix; |
6a7eba24 JFM |
952 | u32 id; |
953 | ||
f50ba1be | 954 | ix = -1; |
6a7eba24 JFM |
955 | id = q_ctrl->id; |
956 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
957 | id &= V4L2_CTRL_ID_MASK; | |
958 | id++; | |
959 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
0f523c2f | 960 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be JFM |
961 | continue; |
962 | if (ix < 0) { | |
963 | ix = i; | |
964 | continue; | |
6a7eba24 | 965 | } |
f50ba1be JFM |
966 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id |
967 | > gspca_dev->sd_desc->ctrls[ix].qctrl.id) | |
968 | continue; | |
969 | ix = i; | |
6a7eba24 | 970 | } |
6a7eba24 | 971 | } |
63eb9546 | 972 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 973 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
f50ba1be JFM |
974 | ix = i; |
975 | break; | |
63eb9546 JFM |
976 | } |
977 | } | |
f50ba1be JFM |
978 | if (ix < 0) |
979 | return -EINVAL; | |
980 | memcpy(q_ctrl, &gspca_dev->sd_desc->ctrls[ix].qctrl, | |
981 | sizeof *q_ctrl); | |
982 | if (gspca_dev->ctrl_dis & (1 << ix)) | |
983 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; | |
984 | return 0; | |
63eb9546 JFM |
985 | } |
986 | ||
987 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
988 | struct v4l2_control *ctrl) | |
989 | { | |
990 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 991 | const struct ctrl *ctrls; |
63eb9546 JFM |
992 | int i, ret; |
993 | ||
63eb9546 JFM |
994 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
995 | i < gspca_dev->sd_desc->nctrls; | |
996 | i++, ctrls++) { | |
997 | if (ctrl->id != ctrls->qctrl.id) | |
998 | continue; | |
0f523c2f HG |
999 | if (gspca_dev->ctrl_dis & (1 << i)) |
1000 | return -EINVAL; | |
63eb9546 | 1001 | if (ctrl->value < ctrls->qctrl.minimum |
fcf5cb24 | 1002 | || ctrl->value > ctrls->qctrl.maximum) |
63eb9546 JFM |
1003 | return -ERANGE; |
1004 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
1005 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1006 | return -ERESTARTSYS; | |
63eb9546 JFM |
1007 | ret = ctrls->set(gspca_dev, ctrl->value); |
1008 | mutex_unlock(&gspca_dev->usb_lock); | |
1009 | return ret; | |
1010 | } | |
1011 | return -EINVAL; | |
1012 | } | |
1013 | ||
1014 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1015 | struct v4l2_control *ctrl) | |
1016 | { | |
1017 | struct gspca_dev *gspca_dev = priv; | |
1018 | ||
a5ae2062 | 1019 | const struct ctrl *ctrls; |
63eb9546 JFM |
1020 | int i, ret; |
1021 | ||
1022 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1023 | i < gspca_dev->sd_desc->nctrls; | |
1024 | i++, ctrls++) { | |
1025 | if (ctrl->id != ctrls->qctrl.id) | |
1026 | continue; | |
0f523c2f HG |
1027 | if (gspca_dev->ctrl_dis & (1 << i)) |
1028 | return -EINVAL; | |
e2997a72 HG |
1029 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1030 | return -ERESTARTSYS; | |
63eb9546 JFM |
1031 | ret = ctrls->get(gspca_dev, &ctrl->value); |
1032 | mutex_unlock(&gspca_dev->usb_lock); | |
1033 | return ret; | |
1034 | } | |
1035 | return -EINVAL; | |
1036 | } | |
1037 | ||
1038 | static int vidioc_querymenu(struct file *file, void *priv, | |
1039 | struct v4l2_querymenu *qmenu) | |
1040 | { | |
1041 | struct gspca_dev *gspca_dev = priv; | |
1042 | ||
1043 | if (!gspca_dev->sd_desc->querymenu) | |
1044 | return -EINVAL; | |
1045 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1046 | } | |
1047 | ||
1048 | static int vidioc_enum_input(struct file *file, void *priv, | |
1049 | struct v4l2_input *input) | |
1050 | { | |
1051 | struct gspca_dev *gspca_dev = priv; | |
1052 | ||
1053 | if (input->index != 0) | |
1054 | return -EINVAL; | |
1055 | memset(input, 0, sizeof *input); | |
1056 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1057 | strncpy(input->name, gspca_dev->sd_desc->name, | |
1058 | sizeof input->name); | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1063 | { | |
1064 | *i = 0; | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1069 | { | |
1070 | if (i > 0) | |
1071 | return -EINVAL; | |
1072 | return (0); | |
1073 | } | |
1074 | ||
1075 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1076 | struct v4l2_requestbuffers *rb) | |
1077 | { | |
1078 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1079 | int i, ret = 0; |
63eb9546 | 1080 | |
63eb9546 JFM |
1081 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1082 | return -EINVAL; | |
d43fa32f | 1083 | switch (rb->memory) { |
5b77ae77 | 1084 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1085 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1086 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1087 | break; |
d43fa32f | 1088 | default: |
63eb9546 | 1089 | return -EINVAL; |
d43fa32f | 1090 | } |
e2997a72 HG |
1091 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1092 | return -ERESTARTSYS; | |
d43fa32f | 1093 | |
5b77ae77 JFM |
1094 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1095 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1096 | ret = -EBUSY; |
1097 | goto out; | |
1098 | } | |
d43fa32f | 1099 | |
5b77ae77 JFM |
1100 | /* only one file may do the capture */ |
1101 | if (gspca_dev->capt_file != NULL | |
1102 | && gspca_dev->capt_file != file) { | |
1103 | ret = -EBUSY; | |
1104 | goto out; | |
1105 | } | |
1106 | ||
1107 | /* if allocated, the buffers must not be mapped */ | |
1108 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1109 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1110 | ret = -EBUSY; |
1111 | goto out; | |
1112 | } | |
5b77ae77 JFM |
1113 | } |
1114 | ||
1115 | /* stop streaming */ | |
1116 | if (gspca_dev->streaming) { | |
1117 | mutex_lock(&gspca_dev->usb_lock); | |
1118 | gspca_stream_off(gspca_dev); | |
1119 | mutex_unlock(&gspca_dev->usb_lock); | |
1120 | } | |
1121 | ||
1122 | /* free the previous allocated buffers, if any */ | |
1123 | if (gspca_dev->nframes != 0) { | |
1124 | frame_free(gspca_dev); | |
1125 | gspca_dev->capt_file = NULL; | |
1126 | } | |
1127 | if (rb->count == 0) /* unrequest */ | |
1128 | goto out; | |
1129 | gspca_dev->memory = rb->memory; | |
1130 | ret = frame_alloc(gspca_dev, rb->count); | |
1131 | if (ret == 0) { | |
1132 | rb->count = gspca_dev->nframes; | |
1133 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1134 | } |
1135 | out: | |
63eb9546 JFM |
1136 | mutex_unlock(&gspca_dev->queue_lock); |
1137 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1138 | return ret; | |
1139 | } | |
1140 | ||
1141 | static int vidioc_querybuf(struct file *file, void *priv, | |
1142 | struct v4l2_buffer *v4l2_buf) | |
1143 | { | |
1144 | struct gspca_dev *gspca_dev = priv; | |
1145 | struct gspca_frame *frame; | |
1146 | ||
63eb9546 JFM |
1147 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1148 | || v4l2_buf->index < 0 | |
1149 | || v4l2_buf->index >= gspca_dev->nframes) | |
1150 | return -EINVAL; | |
1151 | ||
1152 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1153 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static int vidioc_streamon(struct file *file, void *priv, | |
1158 | enum v4l2_buf_type buf_type) | |
1159 | { | |
1160 | struct gspca_dev *gspca_dev = priv; | |
1161 | int ret; | |
1162 | ||
63eb9546 JFM |
1163 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1164 | return -EINVAL; | |
e2997a72 HG |
1165 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1166 | return -ERESTARTSYS; | |
63eb9546 JFM |
1167 | if (!gspca_dev->present) { |
1168 | ret = -ENODEV; | |
1169 | goto out; | |
1170 | } | |
1171 | if (gspca_dev->nframes == 0) { | |
1172 | ret = -EINVAL; | |
1173 | goto out; | |
1174 | } | |
1175 | if (!gspca_dev->streaming) { | |
1176 | ret = gspca_init_transfer(gspca_dev); | |
1177 | if (ret < 0) | |
1178 | goto out; | |
1179 | } | |
335b3f88 | 1180 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1181 | if (gspca_debug & D_STREAM) { |
1182 | PDEBUG_MODE("stream on OK", | |
1183 | gspca_dev->pixfmt, | |
1184 | gspca_dev->width, | |
1185 | gspca_dev->height); | |
1186 | } | |
1187 | #endif | |
e2997a72 | 1188 | ret = 0; |
63eb9546 JFM |
1189 | out: |
1190 | mutex_unlock(&gspca_dev->queue_lock); | |
1191 | return ret; | |
1192 | } | |
1193 | ||
1194 | static int vidioc_streamoff(struct file *file, void *priv, | |
1195 | enum v4l2_buf_type buf_type) | |
1196 | { | |
1197 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1198 | int i, ret; |
63eb9546 | 1199 | |
63eb9546 JFM |
1200 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1201 | return -EINVAL; | |
4aa0d037 JFM |
1202 | if (!gspca_dev->streaming) |
1203 | return 0; | |
1204 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1205 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1206 | |
1207 | /* stop streaming */ | |
4aa0d037 JFM |
1208 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1209 | ret = -ERESTARTSYS; | |
1210 | goto out; | |
63eb9546 | 1211 | } |
4aa0d037 | 1212 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1213 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1214 | |
1215 | /* empty the application queues */ | |
1216 | for (i = 0; i < gspca_dev->nframes; i++) | |
1217 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1218 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1219 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1220 | gspca_dev->sequence = 0; | |
1221 | atomic_set(&gspca_dev->nevent, 0); | |
1222 | ret = 0; | |
4aa0d037 JFM |
1223 | out: |
1224 | mutex_unlock(&gspca_dev->queue_lock); | |
1225 | return ret; | |
63eb9546 JFM |
1226 | } |
1227 | ||
1228 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1229 | struct v4l2_jpegcompression *jpegcomp) | |
1230 | { | |
1231 | struct gspca_dev *gspca_dev = priv; | |
1232 | int ret; | |
1233 | ||
1234 | if (!gspca_dev->sd_desc->get_jcomp) | |
1235 | return -EINVAL; | |
e2997a72 HG |
1236 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1237 | return -ERESTARTSYS; | |
63eb9546 JFM |
1238 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1239 | mutex_unlock(&gspca_dev->usb_lock); | |
1240 | return ret; | |
1241 | } | |
1242 | ||
1243 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1244 | struct v4l2_jpegcompression *jpegcomp) | |
1245 | { | |
1246 | struct gspca_dev *gspca_dev = priv; | |
1247 | int ret; | |
1248 | ||
e2997a72 HG |
1249 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1250 | return -ERESTARTSYS; | |
63eb9546 JFM |
1251 | if (!gspca_dev->sd_desc->set_jcomp) |
1252 | return -EINVAL; | |
1253 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1254 | mutex_unlock(&gspca_dev->usb_lock); | |
1255 | return ret; | |
1256 | } | |
1257 | ||
1258 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1259 | struct v4l2_streamparm *parm) | |
1260 | { | |
1261 | struct gspca_dev *gspca_dev = priv; | |
1262 | ||
6a7eba24 | 1263 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1264 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1265 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1270 | struct v4l2_streamparm *parm) | |
1271 | { | |
1272 | struct gspca_dev *gspca_dev = priv; | |
1273 | int n; | |
1274 | ||
63eb9546 JFM |
1275 | n = parm->parm.capture.readbuffers; |
1276 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1277 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1278 | else | |
1279 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1280 | return 0; |
1281 | } | |
1282 | ||
6a7eba24 JFM |
1283 | static int vidioc_s_std(struct file *filp, void *priv, |
1284 | v4l2_std_id *parm) | |
1285 | { | |
1286 | return 0; | |
1287 | } | |
1288 | ||
63eb9546 JFM |
1289 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1290 | static int vidiocgmbuf(struct file *file, void *priv, | |
1291 | struct video_mbuf *mbuf) | |
1292 | { | |
1293 | struct gspca_dev *gspca_dev = file->private_data; | |
1294 | int i; | |
1295 | ||
1296 | PDEBUG(D_STREAM, "cgmbuf"); | |
1297 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1298 | int ret; |
6a7eba24 JFM |
1299 | |
1300 | { | |
1301 | struct v4l2_format fmt; | |
1302 | ||
1303 | memset(&fmt, 0, sizeof fmt); | |
1304 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1305 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1306 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1307 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1308 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1309 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1310 | if (ret != 0) |
1311 | return ret; | |
1312 | } | |
1313 | { | |
1314 | struct v4l2_requestbuffers rb; | |
1315 | ||
1316 | memset(&rb, 0, sizeof rb); | |
1317 | rb.count = 4; | |
1318 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1319 | rb.memory = V4L2_MEMORY_MMAP; | |
1320 | ret = vidioc_reqbufs(file, priv, &rb); | |
1321 | if (ret != 0) | |
1322 | return ret; | |
1323 | } | |
63eb9546 JFM |
1324 | } |
1325 | mbuf->frames = gspca_dev->nframes; | |
1326 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1327 | for (i = 0; i < mbuf->frames; i++) | |
1328 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1329 | return 0; | |
1330 | } | |
1331 | #endif | |
1332 | ||
1333 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1334 | { | |
1335 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1336 | struct gspca_frame *frame; |
63eb9546 JFM |
1337 | struct page *page; |
1338 | unsigned long addr, start, size; | |
1339 | int i, ret; | |
63eb9546 JFM |
1340 | |
1341 | start = vma->vm_start; | |
1342 | size = vma->vm_end - vma->vm_start; | |
1343 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1344 | ||
e2997a72 HG |
1345 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1346 | return -ERESTARTSYS; | |
63eb9546 JFM |
1347 | if (!gspca_dev->present) { |
1348 | ret = -ENODEV; | |
4aa0d037 JFM |
1349 | goto out; |
1350 | } | |
1351 | if (gspca_dev->capt_file != file) { | |
1352 | ret = -EINVAL; | |
1353 | goto out; | |
63eb9546 JFM |
1354 | } |
1355 | ||
efab8211 | 1356 | frame = NULL; |
63eb9546 JFM |
1357 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1358 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1359 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1360 | break; | |
1361 | } | |
1362 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1363 | == vma->vm_pgoff) { | |
1364 | frame = &gspca_dev->frame[i]; | |
1365 | break; | |
1366 | } | |
1367 | } | |
efab8211 | 1368 | if (frame == NULL) { |
63eb9546 JFM |
1369 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1370 | ret = -EINVAL; | |
4aa0d037 | 1371 | goto out; |
63eb9546 JFM |
1372 | } |
1373 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1374 | /* v4l1 maps all the buffers */ |
1375 | if (i != 0 | |
1376 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1377 | #endif |
ac0d6df6 | 1378 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1379 | PDEBUG(D_STREAM, "mmap bad size"); |
1380 | ret = -EINVAL; | |
4aa0d037 | 1381 | goto out; |
63eb9546 JFM |
1382 | } |
1383 | ||
1384 | /* | |
1385 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1386 | * device. It also prevents the region from being core dumped. | |
1387 | */ | |
1388 | vma->vm_flags |= VM_IO; | |
1389 | ||
1390 | addr = (unsigned long) frame->data; | |
1391 | while (size > 0) { | |
1392 | page = vmalloc_to_page((void *) addr); | |
1393 | ret = vm_insert_page(vma, start, page); | |
1394 | if (ret < 0) | |
4aa0d037 | 1395 | goto out; |
63eb9546 JFM |
1396 | start += PAGE_SIZE; |
1397 | addr += PAGE_SIZE; | |
1398 | size -= PAGE_SIZE; | |
1399 | } | |
1400 | ||
1401 | vma->vm_ops = &gspca_vm_ops; | |
1402 | vma->vm_private_data = frame; | |
1403 | gspca_vm_open(vma); | |
e2997a72 | 1404 | ret = 0; |
4aa0d037 | 1405 | out: |
63eb9546 JFM |
1406 | mutex_unlock(&gspca_dev->queue_lock); |
1407 | return ret; | |
1408 | } | |
1409 | ||
63eb9546 JFM |
1410 | /* |
1411 | * wait for a video frame | |
1412 | * | |
1413 | * If a frame is ready, its index is returned. | |
1414 | */ | |
d43fa32f | 1415 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1416 | int nonblock_ing) |
1417 | { | |
1418 | struct gspca_frame *frame; | |
1419 | int i, j, ret; | |
1420 | ||
d43fa32f | 1421 | /* check if a frame is ready */ |
63eb9546 JFM |
1422 | i = gspca_dev->fr_o; |
1423 | j = gspca_dev->fr_queue[i]; | |
1424 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1425 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1426 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1427 | goto ok; |
82643d0e | 1428 | } |
63eb9546 JFM |
1429 | if (nonblock_ing) /* no frame yet */ |
1430 | return -EAGAIN; | |
1431 | ||
1432 | /* wait till a frame is ready */ | |
1433 | for (;;) { | |
4aa0d037 JFM |
1434 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1435 | atomic_read(&gspca_dev->nevent) > 0, | |
1436 | msecs_to_jiffies(3000)); | |
1437 | if (ret <= 0) { | |
1438 | if (ret < 0) | |
82643d0e JFM |
1439 | return ret; /* interrupt */ |
1440 | return -EIO; /* timeout */ | |
4aa0d037 | 1441 | } |
82643d0e | 1442 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1443 | if (!gspca_dev->streaming || !gspca_dev->present) |
1444 | return -EIO; | |
63eb9546 JFM |
1445 | i = gspca_dev->fr_o; |
1446 | j = gspca_dev->fr_queue[i]; | |
1447 | frame = &gspca_dev->frame[j]; | |
1448 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1449 | break; | |
1450 | } | |
63eb9546 | 1451 | ok: |
63eb9546 JFM |
1452 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1453 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1454 | gspca_dev->fr_q, | |
1455 | gspca_dev->fr_i, | |
1456 | gspca_dev->fr_o); | |
e2997a72 | 1457 | |
739570bb JFM |
1458 | if (gspca_dev->sd_desc->dq_callback) { |
1459 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1460 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1461 | mutex_unlock(&gspca_dev->usb_lock); |
1462 | } | |
63eb9546 JFM |
1463 | return j; |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * dequeue a video buffer | |
1468 | * | |
1469 | * If nonblock_ing is false, block until a buffer is available. | |
1470 | */ | |
1471 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1472 | struct v4l2_buffer *v4l2_buf) | |
1473 | { | |
1474 | struct gspca_dev *gspca_dev = priv; | |
1475 | struct gspca_frame *frame; | |
1476 | int i, ret; | |
1477 | ||
1478 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 JFM |
1479 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1480 | return -EINVAL; | |
1481 | if (v4l2_buf->memory != gspca_dev->memory) | |
63eb9546 | 1482 | return -EINVAL; |
5b77ae77 JFM |
1483 | |
1484 | /* if not streaming, be sure the application will not loop forever */ | |
1485 | if (!(file->f_flags & O_NONBLOCK) | |
1486 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1487 | return -EINVAL; |
1488 | ||
5b77ae77 JFM |
1489 | /* only the capturing file may dequeue */ |
1490 | if (gspca_dev->capt_file != file) | |
1491 | return -EINVAL; | |
1492 | ||
1493 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1494 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1495 | return -ERESTARTSYS; | |
1496 | ||
d43fa32f | 1497 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1498 | if (ret < 0) |
4aa0d037 | 1499 | goto out; |
63eb9546 JFM |
1500 | i = ret; /* frame index */ |
1501 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1502 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1503 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1504 | frame->data, |
1505 | frame->v4l2_buf.bytesused)) { | |
1506 | PDEBUG(D_ERR|D_STREAM, | |
1507 | "dqbuf cp to user failed"); | |
1508 | ret = -EFAULT; | |
1509 | goto out; | |
1510 | } | |
1511 | } | |
63eb9546 JFM |
1512 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1513 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1514 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1515 | ret = 0; | |
4aa0d037 | 1516 | out: |
63eb9546 JFM |
1517 | mutex_unlock(&gspca_dev->read_lock); |
1518 | return ret; | |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * queue a video buffer | |
1523 | * | |
1524 | * Attempting to queue a buffer that has already been | |
1525 | * queued will return -EINVAL. | |
1526 | */ | |
1527 | static int vidioc_qbuf(struct file *file, void *priv, | |
1528 | struct v4l2_buffer *v4l2_buf) | |
1529 | { | |
1530 | struct gspca_dev *gspca_dev = priv; | |
1531 | struct gspca_frame *frame; | |
1532 | int i, index, ret; | |
1533 | ||
1534 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1535 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1536 | return -EINVAL; | |
1537 | ||
5b77ae77 JFM |
1538 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1539 | return -ERESTARTSYS; | |
1540 | ||
63eb9546 JFM |
1541 | index = v4l2_buf->index; |
1542 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1543 | PDEBUG(D_FRAM, |
63eb9546 | 1544 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1545 | ret = -EINVAL; |
1546 | goto out; | |
63eb9546 | 1547 | } |
5b77ae77 | 1548 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1549 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1550 | ret = -EINVAL; |
1551 | goto out; | |
63eb9546 | 1552 | } |
e2997a72 | 1553 | |
5b77ae77 | 1554 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1555 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1556 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1557 | ret = -EINVAL; |
1558 | goto out; | |
1559 | } | |
1560 | ||
1561 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
d43fa32f | 1562 | /* frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; */ |
63eb9546 | 1563 | |
d43fa32f | 1564 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1565 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1566 | frame->v4l2_buf.length = v4l2_buf->length; | |
1567 | } | |
1568 | ||
1569 | /* put the buffer in the 'queued' queue */ | |
1570 | i = gspca_dev->fr_q; | |
1571 | gspca_dev->fr_queue[i] = index; | |
1572 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1573 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1574 | gspca_dev->fr_q, | |
1575 | gspca_dev->fr_i, | |
1576 | gspca_dev->fr_o); | |
1577 | ||
1578 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1579 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1580 | ret = 0; | |
1581 | out: | |
1582 | mutex_unlock(&gspca_dev->queue_lock); | |
1583 | return ret; | |
1584 | } | |
1585 | ||
d43fa32f JFM |
1586 | /* |
1587 | * allocate the resources for read() | |
1588 | */ | |
1589 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1590 | struct file *file) | |
63eb9546 | 1591 | { |
63eb9546 | 1592 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1593 | int i, ret; |
63eb9546 | 1594 | |
d43fa32f | 1595 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1596 | if (gspca_dev->nframes == 0) { |
1597 | struct v4l2_requestbuffers rb; | |
1598 | ||
1599 | memset(&rb, 0, sizeof rb); | |
1600 | rb.count = gspca_dev->nbufread; | |
1601 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1602 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1603 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1604 | if (ret != 0) { | |
d43fa32f | 1605 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1606 | return ret; |
1607 | } | |
1608 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1609 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1610 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1611 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1612 | v4l2_buf.index = i; | |
63eb9546 JFM |
1613 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1614 | if (ret != 0) { | |
1615 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1616 | return ret; | |
1617 | } | |
1618 | } | |
d43fa32f JFM |
1619 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1620 | } | |
4aa0d037 | 1621 | |
d43fa32f JFM |
1622 | /* start streaming */ |
1623 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1624 | if (ret != 0) | |
1625 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1626 | return ret; | |
1627 | } | |
1628 | ||
1629 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1630 | { | |
1631 | struct gspca_dev *gspca_dev = file->private_data; | |
1632 | int i, ret; | |
1633 | ||
1634 | PDEBUG(D_FRAM, "poll"); | |
1635 | ||
1636 | poll_wait(file, &gspca_dev->wq, wait); | |
1637 | if (!gspca_dev->present) | |
1638 | return POLLERR; | |
1639 | ||
5b77ae77 JFM |
1640 | /* if reqbufs is not done, the user would use read() */ |
1641 | if (gspca_dev->nframes == 0) { | |
1642 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1643 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1644 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1645 | if (ret != 0) |
1646 | return POLLERR; | |
63eb9546 JFM |
1647 | } |
1648 | ||
d43fa32f JFM |
1649 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1650 | return POLLERR; | |
1651 | if (!gspca_dev->present) { | |
1652 | ret = POLLERR; | |
1653 | goto out; | |
1654 | } | |
1655 | ||
5b77ae77 | 1656 | /* check the next incoming buffer */ |
d43fa32f JFM |
1657 | i = gspca_dev->fr_o; |
1658 | i = gspca_dev->fr_queue[i]; | |
1659 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1660 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1661 | else | |
1662 | ret = 0; | |
1663 | out: | |
1664 | mutex_unlock(&gspca_dev->queue_lock); | |
1665 | return ret; | |
1666 | } | |
1667 | ||
1668 | static ssize_t dev_read(struct file *file, char __user *data, | |
1669 | size_t count, loff_t *ppos) | |
1670 | { | |
1671 | struct gspca_dev *gspca_dev = file->private_data; | |
1672 | struct gspca_frame *frame; | |
1673 | struct v4l2_buffer v4l2_buf; | |
1674 | struct timeval timestamp; | |
82643d0e | 1675 | int n, ret, ret2; |
d43fa32f | 1676 | |
a9e11134 | 1677 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1678 | if (!gspca_dev->present) |
1679 | return -ENODEV; | |
1680 | switch (gspca_dev->memory) { | |
1681 | case GSPCA_MEMORY_NO: /* first time */ | |
1682 | ret = read_alloc(gspca_dev, file); | |
1683 | if (ret != 0) | |
1684 | return ret; | |
1685 | break; | |
1686 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1687 | if (gspca_dev->capt_file == file) |
1688 | break; | |
1689 | /* fall thru */ | |
d43fa32f JFM |
1690 | default: |
1691 | return -EINVAL; | |
1692 | } | |
1693 | ||
63eb9546 JFM |
1694 | /* get a frame */ |
1695 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1696 | timestamp.tv_sec--; | |
82643d0e JFM |
1697 | n = 2; |
1698 | for (;;) { | |
63eb9546 JFM |
1699 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1700 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1701 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1702 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1703 | if (ret != 0) { | |
1704 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1705 | return ret; | |
1706 | } | |
1707 | ||
1708 | /* if the process slept for more than 1 second, | |
219423c1 | 1709 | * get a newer frame */ |
63eb9546 | 1710 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1711 | if (--n < 0) |
1712 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1713 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1714 | break; | |
1715 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1716 | if (ret != 0) { | |
1717 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1718 | return ret; | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | /* copy the frame */ | |
ac0d6df6 JFM |
1723 | if (count > frame->v4l2_buf.bytesused) |
1724 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1725 | ret = copy_to_user(data, frame->data, count); |
1726 | if (ret != 0) { | |
1727 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1728 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1729 | ret = -EFAULT; |
1730 | goto out; | |
1731 | } | |
1732 | ret = count; | |
1733 | out: | |
1734 | /* in each case, requeue the buffer */ | |
1735 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1736 | if (ret2 != 0) | |
1737 | return ret2; | |
1738 | return ret; | |
1739 | } | |
1740 | ||
d43fa32f | 1741 | static void dev_release(struct video_device *vfd) |
63eb9546 JFM |
1742 | { |
1743 | /* nothing */ | |
1744 | } | |
1745 | ||
1746 | static struct file_operations dev_fops = { | |
1747 | .owner = THIS_MODULE, | |
1748 | .open = dev_open, | |
1749 | .release = dev_close, | |
1750 | .read = dev_read, | |
1751 | .mmap = dev_mmap, | |
1752 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1753 | #ifdef CONFIG_COMPAT |
1754 | .compat_ioctl = v4l_compat_ioctl32, | |
1755 | #endif | |
63eb9546 JFM |
1756 | .llseek = no_llseek, |
1757 | .poll = dev_poll, | |
1758 | }; | |
1759 | ||
a399810c | 1760 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1761 | .vidioc_querycap = vidioc_querycap, |
1762 | .vidioc_dqbuf = vidioc_dqbuf, | |
1763 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1764 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1765 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1766 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1767 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1768 | .vidioc_streamon = vidioc_streamon, |
1769 | .vidioc_queryctrl = vidioc_queryctrl, | |
1770 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1771 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1772 | .vidioc_querymenu = vidioc_querymenu, | |
1773 | .vidioc_enum_input = vidioc_enum_input, | |
1774 | .vidioc_g_input = vidioc_g_input, | |
1775 | .vidioc_s_input = vidioc_s_input, | |
1776 | .vidioc_reqbufs = vidioc_reqbufs, | |
1777 | .vidioc_querybuf = vidioc_querybuf, | |
1778 | .vidioc_streamoff = vidioc_streamoff, | |
1779 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1780 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1781 | .vidioc_g_parm = vidioc_g_parm, | |
1782 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1783 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1784 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1785 | .vidiocgmbuf = vidiocgmbuf, | |
1786 | #endif | |
1787 | }; | |
1788 | ||
a399810c HV |
1789 | static struct video_device gspca_template = { |
1790 | .name = "gspca main driver", | |
a399810c HV |
1791 | .fops = &dev_fops, |
1792 | .ioctl_ops = &dev_ioctl_ops, | |
1793 | .release = dev_release, /* mandatory */ | |
1794 | .minor = -1, | |
1795 | }; | |
1796 | ||
63eb9546 JFM |
1797 | /* |
1798 | * probe and create a new gspca device | |
1799 | * | |
1800 | * This function must be called by the sub-driver when it is | |
1801 | * called for probing a new device. | |
1802 | */ | |
1803 | int gspca_dev_probe(struct usb_interface *intf, | |
1804 | const struct usb_device_id *id, | |
1805 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1806 | int dev_size, |
1807 | struct module *module) | |
63eb9546 JFM |
1808 | { |
1809 | struct usb_interface_descriptor *interface; | |
1810 | struct gspca_dev *gspca_dev; | |
1811 | struct usb_device *dev = interface_to_usbdev(intf); | |
1812 | int ret; | |
63eb9546 | 1813 | |
6a7eba24 | 1814 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1815 | |
1816 | /* we don't handle multi-config cameras */ | |
1817 | if (dev->descriptor.bNumConfigurations != 1) | |
1818 | return -ENODEV; | |
1819 | interface = &intf->cur_altsetting->desc; | |
1820 | if (interface->bInterfaceNumber > 0) | |
1821 | return -ENODEV; | |
1822 | ||
1823 | /* create the device */ | |
1824 | if (dev_size < sizeof *gspca_dev) | |
1825 | dev_size = sizeof *gspca_dev; | |
1826 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
1827 | if (gspca_dev == NULL) { | |
1828 | err("couldn't kzalloc gspca struct"); | |
1829 | return -EIO; | |
1830 | } | |
6b060ffe | 1831 | kref_init(&gspca_dev->kref); |
8295d99e JFM |
1832 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
1833 | if (!gspca_dev->usb_buf) { | |
1834 | err("out of memory"); | |
1835 | ret = -EIO; | |
1836 | goto out; | |
1837 | } | |
63eb9546 JFM |
1838 | gspca_dev->dev = dev; |
1839 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1840 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 JFM |
1841 | gspca_dev->sd_desc = sd_desc; |
1842 | /* gspca_dev->users = 0; (done by kzalloc) */ | |
1843 | gspca_dev->nbufread = 2; | |
1844 | ||
012d6b02 | 1845 | /* configure the subdriver and initialize the USB device */ |
63eb9546 | 1846 | ret = gspca_dev->sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
1847 | if (ret < 0) |
1848 | goto out; | |
1849 | ret = gspca_dev->sd_desc->init(gspca_dev); | |
63eb9546 JFM |
1850 | if (ret < 0) |
1851 | goto out; | |
1852 | ret = gspca_set_alt0(gspca_dev); | |
1853 | if (ret < 0) | |
1854 | goto out; | |
1855 | gspca_set_default_mode(gspca_dev); | |
1856 | ||
1857 | mutex_init(&gspca_dev->usb_lock); | |
1858 | mutex_init(&gspca_dev->read_lock); | |
1859 | mutex_init(&gspca_dev->queue_lock); | |
1860 | init_waitqueue_head(&gspca_dev->wq); | |
1861 | ||
1862 | /* init video stuff */ | |
1863 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
5e85e732 | 1864 | gspca_dev->vdev.parent = &dev->dev; |
d43fa32f JFM |
1865 | memcpy(&gspca_dev->fops, &dev_fops, sizeof gspca_dev->fops); |
1866 | gspca_dev->vdev.fops = &gspca_dev->fops; | |
1867 | gspca_dev->fops.owner = module; /* module protection */ | |
ee56a4d3 | 1868 | gspca_dev->present = 1; |
63eb9546 JFM |
1869 | ret = video_register_device(&gspca_dev->vdev, |
1870 | VFL_TYPE_GRABBER, | |
1871 | video_nr); | |
1872 | if (ret < 0) { | |
1873 | err("video_register_device err %d", ret); | |
1874 | goto out; | |
1875 | } | |
1876 | ||
63eb9546 JFM |
1877 | usb_set_intfdata(intf, gspca_dev); |
1878 | PDEBUG(D_PROBE, "probe ok"); | |
1879 | return 0; | |
1880 | out: | |
6b060ffe | 1881 | kref_put(&gspca_dev->kref, gspca_delete); |
63eb9546 JFM |
1882 | return ret; |
1883 | } | |
1884 | EXPORT_SYMBOL(gspca_dev_probe); | |
1885 | ||
1886 | /* | |
1887 | * USB disconnection | |
1888 | * | |
1889 | * This function must be called by the sub-driver | |
1890 | * when the device disconnects, after the specific resources are freed. | |
1891 | */ | |
1892 | void gspca_disconnect(struct usb_interface *intf) | |
1893 | { | |
4aa0d037 | 1894 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 1895 | |
6b060ffe FZ |
1896 | usb_set_intfdata(intf, NULL); |
1897 | ||
63eb9546 | 1898 | gspca_dev->present = 0; |
e2997a72 HG |
1899 | mutex_lock(&gspca_dev->queue_lock); |
1900 | mutex_lock(&gspca_dev->usb_lock); | |
1901 | gspca_dev->streaming = 0; | |
d43fa32f | 1902 | destroy_urbs(gspca_dev); |
63eb9546 | 1903 | mutex_unlock(&gspca_dev->usb_lock); |
e2997a72 | 1904 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1905 | |
63eb9546 JFM |
1906 | /* We don't want people trying to open up the device */ |
1907 | video_unregister_device(&gspca_dev->vdev); | |
6b060ffe FZ |
1908 | |
1909 | kref_put(&gspca_dev->kref, gspca_delete); | |
1910 | ||
63eb9546 JFM |
1911 | PDEBUG(D_PROBE, "disconnect complete"); |
1912 | } | |
1913 | EXPORT_SYMBOL(gspca_disconnect); | |
1914 | ||
6a709749 JFM |
1915 | #ifdef CONFIG_PM |
1916 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
1917 | { | |
1918 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1919 | ||
1920 | if (!gspca_dev->streaming) | |
1921 | return 0; | |
1922 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
1923 | if (gspca_dev->sd_desc->stopN) |
1924 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
1925 | destroy_urbs(gspca_dev); |
1926 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
1927 | if (gspca_dev->sd_desc->stop0) |
1928 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
1929 | return 0; |
1930 | } | |
1931 | EXPORT_SYMBOL(gspca_suspend); | |
1932 | ||
1933 | int gspca_resume(struct usb_interface *intf) | |
1934 | { | |
1935 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1936 | ||
1937 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
1938 | gspca_dev->sd_desc->init(gspca_dev); |
1939 | if (gspca_dev->streaming) | |
1940 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 1941 | return 0; |
6a709749 JFM |
1942 | } |
1943 | EXPORT_SYMBOL(gspca_resume); | |
1944 | #endif | |
dcef3237 HG |
1945 | /* -- cam driver utility functions -- */ |
1946 | ||
1947 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1948 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1949 | ||
1950 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
1951 | where changed. */ | |
1952 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
1953 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
1954 | { | |
1955 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
1956 | const struct ctrl *gain_ctrl = NULL; | |
1957 | const struct ctrl *exposure_ctrl = NULL; | |
1958 | const struct ctrl *autogain_ctrl = NULL; | |
1959 | int retval = 0; | |
1960 | ||
1961 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
1962 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
1963 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1964 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
1965 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1966 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
1967 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1968 | } | |
1969 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
1970 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
1971 | "on cam without (auto)gain/exposure"); | |
1972 | return 0; | |
1973 | } | |
1974 | ||
1975 | if (gain_ctrl->get(gspca_dev, &gain) || | |
1976 | exposure_ctrl->get(gspca_dev, &exposure) || | |
1977 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
1978 | return 0; | |
1979 | ||
1980 | orig_gain = gain; | |
1981 | orig_exposure = exposure; | |
1982 | ||
1983 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
1984 | desired lumination fast (with the risc of a slight overshoot) */ | |
1985 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
1986 | ||
1987 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d\n", | |
1988 | avg_lum, desired_avg_lum, steps); | |
1989 | ||
1990 | for (i = 0; i < steps; i++) { | |
1991 | if (avg_lum > desired_avg_lum) { | |
1992 | if (gain > gain_knee) | |
1993 | gain--; | |
1994 | else if (exposure > exposure_knee) | |
1995 | exposure--; | |
1996 | else if (gain > gain_ctrl->qctrl.default_value) | |
1997 | gain--; | |
1998 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
1999 | exposure--; | |
2000 | else if (gain > gain_ctrl->qctrl.minimum) | |
2001 | gain--; | |
2002 | else | |
2003 | break; | |
2004 | } else { | |
2005 | if (gain < gain_ctrl->qctrl.default_value) | |
2006 | gain++; | |
2007 | else if (exposure < exposure_knee) | |
2008 | exposure++; | |
2009 | else if (gain < gain_knee) | |
2010 | gain++; | |
2011 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2012 | exposure++; | |
2013 | else if (gain < gain_ctrl->qctrl.maximum) | |
2014 | gain++; | |
2015 | else | |
2016 | break; | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | if (gain != orig_gain) { | |
2021 | gain_ctrl->set(gspca_dev, gain); | |
2022 | retval = 1; | |
2023 | } | |
2024 | if (exposure != orig_exposure) { | |
2025 | exposure_ctrl->set(gspca_dev, exposure); | |
2026 | retval = 1; | |
2027 | } | |
2028 | ||
2029 | return retval; | |
2030 | } | |
2031 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2032 | ||
63eb9546 JFM |
2033 | /* -- module insert / remove -- */ |
2034 | static int __init gspca_init(void) | |
2035 | { | |
bb64e86c JFM |
2036 | info("main v%d.%d.%d registered", |
2037 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2038 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2039 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2040 | return 0; |
2041 | } | |
2042 | static void __exit gspca_exit(void) | |
2043 | { | |
2044 | info("main deregistered"); | |
2045 | } | |
2046 | ||
2047 | module_init(gspca_init); | |
2048 | module_exit(gspca_exit); | |
2049 | ||
335b3f88 | 2050 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2051 | module_param_named(debug, gspca_debug, int, 0644); |
2052 | MODULE_PARM_DESC(debug, | |
2053 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2054 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2055 | " 0x0100: v4l2"); | |
6a7eba24 | 2056 | #endif |