Commit | Line | Data |
---|---|---|
63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
11bd199a | 4 | * Copyright (C) 2008-2009 Jean-Francois Moine (http://moinejf.free.fr) |
63eb9546 JFM |
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 */ |
8fee8453 JFM |
41 | #define DEF_NURBS 3 /* default number of URBs */ |
42 | #if DEF_NURBS > MAX_NURBS | |
43 | #error "DEF_NURBS too big" | |
44 | #endif | |
d43fa32f | 45 | |
63eb9546 JFM |
46 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
47 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
a0d64456 | 50 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 7, 0) |
63eb9546 | 51 | |
335b3f88 | 52 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
53 | int gspca_debug = D_ERR | D_PROBE; |
54 | EXPORT_SYMBOL(gspca_debug); | |
55 | ||
56 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
57 | { | |
58 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
59 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
60 | txt, | |
61 | pixfmt & 0xff, | |
62 | (pixfmt >> 8) & 0xff, | |
63 | (pixfmt >> 16) & 0xff, | |
64 | pixfmt >> 24, | |
65 | w, h); | |
66 | } else { | |
67 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
68 | txt, | |
69 | pixfmt, | |
70 | w, h); | |
71 | } | |
72 | } | |
73 | #else | |
74 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
75 | #endif | |
76 | ||
d43fa32f JFM |
77 | /* specific memory types - !! should different from V4L2_MEMORY_xxx */ |
78 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ | |
79 | #define GSPCA_MEMORY_READ 7 | |
80 | ||
d43fa32f | 81 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 82 | |
63eb9546 JFM |
83 | /* |
84 | * VMA operations. | |
85 | */ | |
86 | static void gspca_vm_open(struct vm_area_struct *vma) | |
87 | { | |
88 | struct gspca_frame *frame = vma->vm_private_data; | |
89 | ||
90 | frame->vma_use_count++; | |
91 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
92 | } | |
93 | ||
94 | static void gspca_vm_close(struct vm_area_struct *vma) | |
95 | { | |
96 | struct gspca_frame *frame = vma->vm_private_data; | |
97 | ||
98 | if (--frame->vma_use_count <= 0) | |
99 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
100 | } | |
101 | ||
f0f37e2f | 102 | static const struct vm_operations_struct gspca_vm_ops = { |
63eb9546 JFM |
103 | .open = gspca_vm_open, |
104 | .close = gspca_vm_close, | |
105 | }; | |
106 | ||
1b60e1ad JFM |
107 | /* get the current input frame buffer */ |
108 | struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev) | |
109 | { | |
110 | struct gspca_frame *frame; | |
111 | int i; | |
112 | ||
113 | i = gspca_dev->fr_i; | |
114 | i = gspca_dev->fr_queue[i]; | |
115 | frame = &gspca_dev->frame[i]; | |
116 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) | |
117 | != V4L2_BUF_FLAG_QUEUED) | |
118 | return NULL; | |
119 | return frame; | |
120 | } | |
121 | EXPORT_SYMBOL(gspca_get_i_frame); | |
122 | ||
63eb9546 | 123 | /* |
d43fa32f | 124 | * fill a video frame from an URB and resubmit |
63eb9546 | 125 | */ |
d43fa32f JFM |
126 | static void fill_frame(struct gspca_dev *gspca_dev, |
127 | struct urb *urb) | |
63eb9546 | 128 | { |
63eb9546 | 129 | struct gspca_frame *frame; |
8d584a53 | 130 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 131 | int i, len, st; |
63eb9546 JFM |
132 | cam_pkt_op pkt_scan; |
133 | ||
6a7eba24 | 134 | if (urb->status != 0) { |
090264e5 JFM |
135 | if (urb->status == -ESHUTDOWN) |
136 | return; /* disconnection */ | |
62ee8eee | 137 | #ifdef CONFIG_PM |
6a709749 | 138 | if (!gspca_dev->frozen) |
62ee8eee | 139 | #endif |
6a709749 | 140 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
090264e5 | 141 | return; |
6a7eba24 | 142 | } |
63eb9546 JFM |
143 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
144 | for (i = 0; i < urb->number_of_packets; i++) { | |
145 | ||
146 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
147 | frame = gspca_get_i_frame(gspca_dev); |
148 | if (!frame) { | |
63eb9546 JFM |
149 | gspca_dev->last_packet_type = DISCARD_PACKET; |
150 | break; | |
151 | } | |
152 | ||
153 | /* check the packet status and length */ | |
154 | len = urb->iso_frame_desc[i].actual_length; | |
ff374747 JFM |
155 | if (len == 0) { |
156 | if (gspca_dev->empty_packet == 0) | |
157 | gspca_dev->empty_packet = 1; | |
6a7eba24 | 158 | continue; |
ff374747 | 159 | } |
63eb9546 JFM |
160 | st = urb->iso_frame_desc[i].status; |
161 | if (st) { | |
6a7eba24 JFM |
162 | PDEBUG(D_ERR, |
163 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
164 | i, len, st); |
165 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
166 | continue; | |
167 | } | |
63eb9546 JFM |
168 | |
169 | /* let the packet be analyzed by the subdriver */ | |
170 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
171 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 172 | data = (u8 *) urb->transfer_buffer |
63eb9546 JFM |
173 | + urb->iso_frame_desc[i].offset; |
174 | pkt_scan(gspca_dev, frame, data, len); | |
175 | } | |
176 | ||
177 | /* resubmit the URB */ | |
63eb9546 JFM |
178 | st = usb_submit_urb(urb, GFP_ATOMIC); |
179 | if (st < 0) | |
180 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
181 | } | |
182 | ||
d43fa32f JFM |
183 | /* |
184 | * ISOC message interrupt from the USB device | |
185 | * | |
ac0d6df6 | 186 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 187 | */ |
8d584a53 | 188 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
189 | { |
190 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
191 | ||
3647fea8 | 192 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
193 | if (!gspca_dev->streaming) |
194 | return; | |
195 | fill_frame(gspca_dev, urb); | |
196 | } | |
197 | ||
0be01004 JFM |
198 | /* |
199 | * bulk message interrupt from the USB device | |
200 | */ | |
8d584a53 | 201 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
202 | { |
203 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
204 | struct gspca_frame *frame; | |
dff369aa | 205 | int st; |
0be01004 JFM |
206 | |
207 | PDEBUG(D_PACK, "bulk irq"); | |
208 | if (!gspca_dev->streaming) | |
209 | return; | |
880ae24d JFM |
210 | switch (urb->status) { |
211 | case 0: | |
212 | break; | |
090264e5 JFM |
213 | case -ESHUTDOWN: |
214 | return; /* disconnection */ | |
880ae24d JFM |
215 | case -ECONNRESET: |
216 | urb->status = 0; | |
217 | break; | |
218 | default: | |
0be01004 JFM |
219 | #ifdef CONFIG_PM |
220 | if (!gspca_dev->frozen) | |
221 | #endif | |
222 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
090264e5 | 223 | return; |
0be01004 JFM |
224 | } |
225 | ||
226 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
227 | frame = gspca_get_i_frame(gspca_dev); |
228 | if (!frame) { | |
0be01004 JFM |
229 | gspca_dev->last_packet_type = DISCARD_PACKET; |
230 | } else { | |
231 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); | |
232 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
233 | frame, | |
234 | urb->transfer_buffer, | |
235 | urb->actual_length); | |
236 | } | |
dff369aa AO |
237 | |
238 | /* resubmit the URB */ | |
239 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
240 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
241 | if (st < 0) | |
242 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
243 | } | |
0be01004 JFM |
244 | } |
245 | ||
63eb9546 JFM |
246 | /* |
247 | * add data to the current frame | |
248 | * | |
ac0d6df6 JFM |
249 | * This function is called by the subdrivers at interrupt level. |
250 | * | |
63eb9546 JFM |
251 | * To build a frame, these ones must add |
252 | * - one FIRST_PACKET | |
253 | * - 0 or many INTER_PACKETs | |
254 | * - one LAST_PACKET | |
255 | * DISCARD_PACKET invalidates the whole frame. | |
256 | * On LAST_PACKET, a new frame is returned. | |
257 | */ | |
258 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
e293e599 | 259 | enum gspca_packet_type packet_type, |
63eb9546 | 260 | struct gspca_frame *frame, |
a5ae2062 | 261 | const __u8 *data, |
63eb9546 JFM |
262 | int len) |
263 | { | |
264 | int i, j; | |
265 | ||
e2997a72 | 266 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
267 | |
268 | /* when start of a new frame, if the current frame buffer | |
269 | * is not queued, discard the whole frame */ | |
270 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
271 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
272 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
273 | gspca_dev->last_packet_type = DISCARD_PACKET; |
274 | return frame; | |
275 | } | |
276 | frame->data_end = frame->data; | |
277 | jiffies_to_timeval(get_jiffies_64(), | |
278 | &frame->v4l2_buf.timestamp); | |
279 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 280 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
281 | if (packet_type == LAST_PACKET) |
282 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 283 | return frame; |
d43fa32f | 284 | } |
63eb9546 | 285 | |
d43fa32f | 286 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
287 | if (len > 0) { |
288 | if (frame->data_end - frame->data + len | |
289 | > frame->v4l2_buf.length) { | |
a9e11134 | 290 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
291 | frame->data_end - frame->data + len, |
292 | frame->v4l2_buf.length); | |
293 | packet_type = DISCARD_PACKET; | |
294 | } else { | |
ac0d6df6 | 295 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
296 | frame->data_end += len; |
297 | } | |
298 | } | |
299 | gspca_dev->last_packet_type = packet_type; | |
300 | ||
219423c1 | 301 | /* if last packet, wake up the application and advance in the queue */ |
63eb9546 JFM |
302 | if (packet_type == LAST_PACKET) { |
303 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
304 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
305 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
63eb9546 | 306 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
d43fa32f JFM |
307 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
308 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
309 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
310 | frame->v4l2_buf.bytesused, | |
311 | gspca_dev->fr_q, | |
312 | i, | |
313 | gspca_dev->fr_o); | |
314 | j = gspca_dev->fr_queue[i]; | |
315 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
316 | } |
317 | return frame; | |
318 | } | |
319 | EXPORT_SYMBOL(gspca_frame_add); | |
320 | ||
321 | static int gspca_is_compressed(__u32 format) | |
322 | { | |
323 | switch (format) { | |
324 | case V4L2_PIX_FMT_MJPEG: | |
325 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 326 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 327 | case V4L2_PIX_FMT_PAC207: |
d661e622 | 328 | case V4L2_PIX_FMT_MR97310A: |
63eb9546 JFM |
329 | return 1; |
330 | } | |
331 | return 0; | |
332 | } | |
333 | ||
334 | static void *rvmalloc(unsigned long size) | |
335 | { | |
336 | void *mem; | |
337 | unsigned long adr; | |
338 | ||
63eb9546 | 339 | mem = vmalloc_32(size); |
efab8211 | 340 | if (mem != NULL) { |
63eb9546 JFM |
341 | adr = (unsigned long) mem; |
342 | while ((long) size > 0) { | |
343 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
344 | adr += PAGE_SIZE; | |
345 | size -= PAGE_SIZE; | |
346 | } | |
347 | } | |
348 | return mem; | |
349 | } | |
350 | ||
ac0d6df6 | 351 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
352 | { |
353 | unsigned long adr; | |
354 | ||
63eb9546 | 355 | adr = (unsigned long) mem; |
ac0d6df6 | 356 | while (size > 0) { |
63eb9546 JFM |
357 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
358 | adr += PAGE_SIZE; | |
359 | size -= PAGE_SIZE; | |
360 | } | |
361 | vfree(mem); | |
362 | } | |
363 | ||
364 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 365 | unsigned int count) |
63eb9546 | 366 | { |
d43fa32f JFM |
367 | struct gspca_frame *frame; |
368 | unsigned int frsz; | |
369 | int i; | |
63eb9546 | 370 | |
c2446b3e JFM |
371 | i = gspca_dev->curr_mode; |
372 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 373 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 374 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 375 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
376 | if (count > GSPCA_MAX_FRAMES) |
377 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
378 | gspca_dev->frbuf = rvmalloc(frsz * count); |
379 | if (!gspca_dev->frbuf) { | |
380 | err("frame alloc failed"); | |
381 | return -ENOMEM; | |
63eb9546 JFM |
382 | } |
383 | gspca_dev->nframes = count; | |
384 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
385 | frame = &gspca_dev->frame[i]; |
386 | frame->v4l2_buf.index = i; | |
387 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
388 | frame->v4l2_buf.flags = 0; | |
389 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
390 | frame->v4l2_buf.length = frsz; | |
391 | frame->v4l2_buf.memory = gspca_dev->memory; | |
392 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 393 | frame->data = frame->data_end = |
d43fa32f | 394 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 395 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
396 | } |
397 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
398 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
399 | gspca_dev->sequence = 0; | |
d43fa32f | 400 | return 0; |
63eb9546 JFM |
401 | } |
402 | ||
403 | static void frame_free(struct gspca_dev *gspca_dev) | |
404 | { | |
405 | int i; | |
406 | ||
407 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 408 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
409 | rvfree(gspca_dev->frbuf, |
410 | gspca_dev->nframes * gspca_dev->frsz); | |
411 | gspca_dev->frbuf = NULL; | |
412 | for (i = 0; i < gspca_dev->nframes; i++) | |
413 | gspca_dev->frame[i].data = NULL; | |
414 | } | |
415 | gspca_dev->nframes = 0; | |
416 | } | |
417 | ||
d43fa32f | 418 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
419 | { |
420 | struct urb *urb; | |
421 | unsigned int i; | |
422 | ||
423 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 424 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 425 | urb = gspca_dev->urb[i]; |
63eb9546 | 426 | if (urb == NULL) |
d43fa32f | 427 | break; |
63eb9546 | 428 | |
4aa0d037 | 429 | gspca_dev->urb[i] = NULL; |
090264e5 | 430 | usb_kill_urb(urb); |
efab8211 | 431 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
432 | usb_buffer_free(gspca_dev->dev, |
433 | urb->transfer_buffer_length, | |
4aa0d037 | 434 | urb->transfer_buffer, |
63eb9546 | 435 | urb->transfer_dma); |
63eb9546 JFM |
436 | usb_free_urb(urb); |
437 | } | |
63eb9546 JFM |
438 | } |
439 | ||
440 | /* | |
219423c1 | 441 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 442 | */ |
0be01004 | 443 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
6929dc6b | 444 | int xfer) |
63eb9546 JFM |
445 | { |
446 | struct usb_host_endpoint *ep; | |
447 | int i, attr; | |
448 | ||
63eb9546 JFM |
449 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
450 | ep = &alt->endpoint[i]; | |
50e06dee | 451 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 JFM |
452 | if (attr == xfer |
453 | && ep->desc.wMaxPacketSize != 0) | |
50e06dee | 454 | return ep; |
63eb9546 JFM |
455 | } |
456 | return NULL; | |
457 | } | |
458 | ||
459 | /* | |
219423c1 | 460 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
461 | * |
462 | * The endpoint is defined by the subdriver. | |
463 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
464 | * This routine may be called many times when the bandwidth is too small | |
465 | * (the bandwidth is checked on urb submit). | |
466 | */ | |
0be01004 | 467 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
468 | { |
469 | struct usb_interface *intf; | |
470 | struct usb_host_endpoint *ep; | |
6929dc6b | 471 | int xfer, i, ret; |
63eb9546 JFM |
472 | |
473 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 474 | ep = NULL; |
6929dc6b JFM |
475 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
476 | : USB_ENDPOINT_XFER_ISOC; | |
63eb9546 | 477 | i = gspca_dev->alt; /* previous alt setting */ |
0dc641dc | 478 | while (--i >= 0) { |
6929dc6b | 479 | ep = alt_xfer(&intf->altsetting[i], xfer); |
63eb9546 JFM |
480 | if (ep) |
481 | break; | |
482 | } | |
6a7eba24 | 483 | if (ep == NULL) { |
6929dc6b JFM |
484 | err("no transfer endpoint found"); |
485 | return NULL; | |
63eb9546 | 486 | } |
0be01004 | 487 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 488 | i, ep->desc.bEndpointAddress); |
1c8336d3 | 489 | gspca_dev->alt = i; /* memorize the current alt setting */ |
8dd07ef1 | 490 | if (gspca_dev->nbalt > 1) { |
95d9142c JFM |
491 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); |
492 | if (ret < 0) { | |
6929dc6b | 493 | err("set alt %d err %d", i, ret); |
95d9142c JFM |
494 | return NULL; |
495 | } | |
63eb9546 | 496 | } |
63eb9546 JFM |
497 | return ep; |
498 | } | |
499 | ||
500 | /* | |
0be01004 | 501 | * create the URBs for image transfer |
63eb9546 JFM |
502 | */ |
503 | static int create_urbs(struct gspca_dev *gspca_dev, | |
504 | struct usb_host_endpoint *ep) | |
505 | { | |
506 | struct urb *urb; | |
d43fa32f | 507 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
508 | |
509 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 510 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 511 | |
6929dc6b | 512 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
513 | |
514 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
515 | if (gspca_dev->pkt_size == 0) |
516 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
517 | else | |
518 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
519 | npkt = gspca_dev->cam.npkt; |
520 | if (npkt == 0) | |
521 | npkt = 32; /* default value */ | |
0be01004 JFM |
522 | bsize = psize * npkt; |
523 | PDEBUG(D_STREAM, | |
524 | "isoc %d pkts size %d = bsize:%d", | |
525 | npkt, psize, bsize); | |
51977a8d | 526 | nurbs = DEF_NURBS; |
95d9142c | 527 | } else { /* bulk */ |
0be01004 | 528 | npkt = 0; |
dff369aa | 529 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
530 | if (bsize == 0) |
531 | bsize = psize; | |
0be01004 | 532 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
533 | if (gspca_dev->cam.bulk_nurbs != 0) |
534 | nurbs = gspca_dev->cam.bulk_nurbs; | |
535 | else | |
536 | nurbs = 1; | |
0be01004 JFM |
537 | } |
538 | ||
6a7eba24 | 539 | gspca_dev->nurbs = nurbs; |
d43fa32f | 540 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
541 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
542 | if (!urb) { | |
543 | err("usb_alloc_urb failed"); | |
0d0548e6 | 544 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
545 | return -ENOMEM; |
546 | } | |
4aa0d037 | 547 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
548 | bsize, |
549 | GFP_KERNEL, | |
550 | &urb->transfer_dma); | |
551 | ||
4aa0d037 | 552 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 553 | usb_free_urb(urb); |
63eb9546 | 554 | err("usb_buffer_urb failed"); |
0d0548e6 | 555 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
556 | return -ENOMEM; |
557 | } | |
4aa0d037 | 558 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
559 | urb->dev = gspca_dev->dev; |
560 | urb->context = gspca_dev; | |
63eb9546 | 561 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
562 | if (npkt != 0) { /* ISOC */ |
563 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
564 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
565 | urb->transfer_flags = URB_ISO_ASAP |
566 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
567 | urb->interval = ep->desc.bInterval; |
568 | urb->complete = isoc_irq; | |
569 | urb->number_of_packets = npkt; | |
570 | for (i = 0; i < npkt; i++) { | |
571 | urb->iso_frame_desc[i].length = psize; | |
572 | urb->iso_frame_desc[i].offset = psize * i; | |
573 | } | |
574 | } else { /* bulk */ | |
575 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
576 | ep->desc.bEndpointAddress), | |
6c49da7f | 577 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 578 | urb->complete = bulk_irq; |
63eb9546 JFM |
579 | } |
580 | } | |
581 | return 0; | |
582 | } | |
583 | ||
584 | /* | |
585 | * start the USB transfer | |
586 | */ | |
587 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
588 | { | |
63eb9546 JFM |
589 | struct usb_host_endpoint *ep; |
590 | int n, ret; | |
591 | ||
e2997a72 HG |
592 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
593 | return -ERESTARTSYS; | |
63eb9546 | 594 | |
090264e5 JFM |
595 | if (!gspca_dev->present) { |
596 | ret = -ENODEV; | |
597 | goto out; | |
598 | } | |
599 | ||
d43fa32f JFM |
600 | /* set the higher alternate setting and |
601 | * loop until urb submit succeeds */ | |
602 | gspca_dev->alt = gspca_dev->nbalt; | |
1f53b0b0 JFM |
603 | if (gspca_dev->sd_desc->isoc_init) { |
604 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
605 | if (ret < 0) | |
606 | goto out; | |
607 | } | |
608 | ep = get_ep(gspca_dev); | |
609 | if (ep == NULL) { | |
610 | ret = -EIO; | |
611 | goto out; | |
612 | } | |
63eb9546 | 613 | for (;;) { |
d43fa32f | 614 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
63eb9546 JFM |
615 | ret = create_urbs(gspca_dev, ep); |
616 | if (ret < 0) | |
617 | goto out; | |
618 | ||
8fe2f1d5 | 619 | /* clear the bulk endpoint */ |
6929dc6b | 620 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 621 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 622 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 623 | |
63eb9546 | 624 | /* start the cam */ |
72ab97ce JFM |
625 | ret = gspca_dev->sd_desc->start(gspca_dev); |
626 | if (ret < 0) { | |
627 | destroy_urbs(gspca_dev); | |
628 | goto out; | |
629 | } | |
63eb9546 | 630 | gspca_dev->streaming = 1; |
63eb9546 | 631 | |
dff369aa | 632 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 633 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
634 | break; |
635 | ||
63eb9546 | 636 | /* submit the URBs */ |
d43fa32f | 637 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 638 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
1f53b0b0 JFM |
639 | if (ret < 0) |
640 | break; | |
63eb9546 JFM |
641 | } |
642 | if (ret >= 0) | |
643 | break; | |
1f53b0b0 JFM |
644 | PDEBUG(D_ERR|D_STREAM, |
645 | "usb_submit_urb alt %d err %d", gspca_dev->alt, ret); | |
646 | gspca_dev->streaming = 0; | |
647 | destroy_urbs(gspca_dev); | |
648 | if (ret != -ENOSPC) | |
649 | goto out; | |
650 | ||
651 | /* the bandwidth is not wide enough | |
652 | * negociate or try a lower alternate setting */ | |
653 | msleep(20); /* wait for kill complete */ | |
654 | if (gspca_dev->sd_desc->isoc_nego) { | |
655 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
656 | if (ret < 0) | |
657 | goto out; | |
658 | } else { | |
659 | ep = get_ep(gspca_dev); | |
660 | if (ep == NULL) { | |
661 | ret = -EIO; | |
662 | goto out; | |
663 | } | |
664 | } | |
63eb9546 JFM |
665 | } |
666 | out: | |
667 | mutex_unlock(&gspca_dev->usb_lock); | |
668 | return ret; | |
669 | } | |
670 | ||
671 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
672 | { | |
673 | int ret; | |
674 | ||
8dd07ef1 JFM |
675 | if (gspca_dev->alt == 0) |
676 | return 0; | |
63eb9546 JFM |
677 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); |
678 | if (ret < 0) | |
f955c4fc | 679 | PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret); |
63eb9546 JFM |
680 | return ret; |
681 | } | |
682 | ||
219423c1 | 683 | /* Note: both the queue and the usb locks should be held when calling this */ |
63eb9546 JFM |
684 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
685 | { | |
63eb9546 | 686 | gspca_dev->streaming = 0; |
090264e5 JFM |
687 | if (gspca_dev->present) { |
688 | if (gspca_dev->sd_desc->stopN) | |
689 | gspca_dev->sd_desc->stopN(gspca_dev); | |
690 | destroy_urbs(gspca_dev); | |
d08e2ce0 | 691 | gspca_set_alt0(gspca_dev); |
090264e5 JFM |
692 | } |
693 | ||
694 | /* always call stop0 to free the subdriver's resources */ | |
98522a7b JFM |
695 | if (gspca_dev->sd_desc->stop0) |
696 | gspca_dev->sd_desc->stop0(gspca_dev); | |
697 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 JFM |
698 | } |
699 | ||
d43fa32f | 700 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
701 | { |
702 | int i; | |
703 | ||
704 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
705 | gspca_dev->curr_mode = i; | |
706 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
707 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 708 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
709 | } |
710 | ||
711 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
712 | int width, int height) | |
713 | { | |
714 | int i; | |
715 | ||
d43fa32f JFM |
716 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
717 | if (width >= gspca_dev->cam.cam_mode[i].width | |
718 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
719 | break; |
720 | } | |
63eb9546 JFM |
721 | return i; |
722 | } | |
723 | ||
63eb9546 JFM |
724 | /* |
725 | * search a mode with the right pixel format | |
726 | */ | |
727 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
728 | int mode, | |
729 | int pixfmt) | |
730 | { | |
731 | int modeU, modeD; | |
732 | ||
733 | modeU = modeD = mode; | |
734 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
735 | if (--modeD >= 0) { | |
c2446b3e JFM |
736 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
737 | == pixfmt) | |
63eb9546 JFM |
738 | return modeD; |
739 | } | |
740 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
741 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
742 | == pixfmt) | |
63eb9546 JFM |
743 | return modeU; |
744 | } | |
745 | } | |
746 | return -EINVAL; | |
747 | } | |
748 | ||
af1d9afa BJ |
749 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
750 | static int vidioc_g_register(struct file *file, void *priv, | |
751 | struct v4l2_dbg_register *reg) | |
752 | { | |
753 | int ret; | |
754 | struct gspca_dev *gspca_dev = priv; | |
755 | ||
756 | if (!gspca_dev->sd_desc->get_chip_ident) | |
757 | return -EINVAL; | |
758 | ||
759 | if (!gspca_dev->sd_desc->get_register) | |
760 | return -EINVAL; | |
761 | ||
762 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
763 | return -ERESTARTSYS; | |
764 | if (gspca_dev->present) | |
765 | ret = gspca_dev->sd_desc->get_register(gspca_dev, reg); | |
766 | else | |
767 | ret = -ENODEV; | |
768 | mutex_unlock(&gspca_dev->usb_lock); | |
769 | ||
770 | return ret; | |
771 | } | |
772 | ||
773 | static int vidioc_s_register(struct file *file, void *priv, | |
774 | struct v4l2_dbg_register *reg) | |
775 | { | |
776 | int ret; | |
777 | struct gspca_dev *gspca_dev = priv; | |
778 | ||
779 | if (!gspca_dev->sd_desc->get_chip_ident) | |
780 | return -EINVAL; | |
781 | ||
782 | if (!gspca_dev->sd_desc->set_register) | |
783 | return -EINVAL; | |
784 | ||
785 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
786 | return -ERESTARTSYS; | |
787 | if (gspca_dev->present) | |
788 | ret = gspca_dev->sd_desc->set_register(gspca_dev, reg); | |
789 | else | |
790 | ret = -ENODEV; | |
791 | mutex_unlock(&gspca_dev->usb_lock); | |
792 | ||
793 | return ret; | |
794 | } | |
795 | #endif | |
796 | ||
797 | static int vidioc_g_chip_ident(struct file *file, void *priv, | |
798 | struct v4l2_dbg_chip_ident *chip) | |
799 | { | |
800 | int ret; | |
801 | struct gspca_dev *gspca_dev = priv; | |
802 | ||
803 | if (!gspca_dev->sd_desc->get_chip_ident) | |
804 | return -EINVAL; | |
805 | ||
806 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
807 | return -ERESTARTSYS; | |
808 | if (gspca_dev->present) | |
809 | ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip); | |
810 | else | |
811 | ret = -ENODEV; | |
812 | mutex_unlock(&gspca_dev->usb_lock); | |
813 | ||
814 | return ret; | |
815 | } | |
816 | ||
e078770a | 817 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
818 | struct v4l2_fmtdesc *fmtdesc) |
819 | { | |
820 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 821 | int i, j, index; |
63eb9546 JFM |
822 | __u32 fmt_tb[8]; |
823 | ||
63eb9546 JFM |
824 | /* give an index to each format */ |
825 | index = 0; | |
826 | j = 0; | |
827 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 828 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
829 | j = 0; |
830 | for (;;) { | |
831 | if (fmt_tb[j] == fmt_tb[index]) | |
832 | break; | |
833 | j++; | |
834 | } | |
835 | if (j == index) { | |
836 | if (fmtdesc->index == index) | |
837 | break; /* new format */ | |
838 | index++; | |
80297125 | 839 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
840 | return -EINVAL; |
841 | } | |
842 | } | |
843 | if (i < 0) | |
844 | return -EINVAL; /* no more format */ | |
845 | ||
63eb9546 JFM |
846 | fmtdesc->pixelformat = fmt_tb[index]; |
847 | if (gspca_is_compressed(fmt_tb[index])) | |
848 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
849 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
850 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
851 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
852 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
853 | fmtdesc->description[4] = '\0'; | |
854 | return 0; | |
855 | } | |
856 | ||
e078770a | 857 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
858 | struct v4l2_format *fmt) |
859 | { | |
860 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 861 | int mode; |
63eb9546 | 862 | |
c2446b3e JFM |
863 | mode = gspca_dev->curr_mode; |
864 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
865 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
866 | return 0; |
867 | } | |
868 | ||
e078770a | 869 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
870 | struct v4l2_format *fmt) |
871 | { | |
24c530b4 | 872 | int w, h, mode, mode2; |
63eb9546 | 873 | |
4aa0d037 JFM |
874 | w = fmt->fmt.pix.width; |
875 | h = fmt->fmt.pix.height; | |
d43fa32f | 876 | |
335b3f88 | 877 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
878 | if (gspca_debug & D_CONF) |
879 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
880 | #endif | |
881 | /* search the closest mode for width and height */ | |
882 | mode = wxh_to_mode(gspca_dev, w, h); | |
883 | ||
884 | /* OK if right palette */ | |
c2446b3e JFM |
885 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
886 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
887 | |
888 | /* else, search the closest mode with the same pixel format */ | |
889 | mode2 = gspca_get_mode(gspca_dev, mode, | |
890 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 891 | if (mode2 >= 0) |
63eb9546 | 892 | mode = mode2; |
c2446b3e JFM |
893 | /* else |
894 | ; * no chance, return this mode */ | |
63eb9546 | 895 | } |
c2446b3e JFM |
896 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
897 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
898 | return mode; /* used when s_fmt */ |
899 | } | |
900 | ||
e078770a | 901 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
902 | void *priv, |
903 | struct v4l2_format *fmt) | |
904 | { | |
4aa0d037 | 905 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
906 | int ret; |
907 | ||
e078770a | 908 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
909 | if (ret < 0) |
910 | return ret; | |
911 | return 0; | |
912 | } | |
913 | ||
e078770a | 914 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
915 | struct v4l2_format *fmt) |
916 | { | |
917 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 918 | int ret; |
63eb9546 | 919 | |
e2997a72 HG |
920 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
921 | return -ERESTARTSYS; | |
d43fa32f | 922 | |
e078770a | 923 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
924 | if (ret < 0) |
925 | goto out; | |
926 | ||
d43fa32f JFM |
927 | if (gspca_dev->nframes != 0 |
928 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
929 | ret = -EINVAL; | |
930 | goto out; | |
931 | } | |
932 | ||
50a871fe JFM |
933 | if (ret == gspca_dev->curr_mode) { |
934 | ret = 0; | |
63eb9546 | 935 | goto out; /* same mode */ |
50a871fe | 936 | } |
d43fa32f JFM |
937 | |
938 | if (gspca_dev->streaming) { | |
939 | ret = -EBUSY; | |
940 | goto out; | |
e2997a72 | 941 | } |
4aa0d037 JFM |
942 | gspca_dev->width = fmt->fmt.pix.width; |
943 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
944 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
945 | gspca_dev->curr_mode = ret; | |
d43fa32f | 946 | |
d43fa32f | 947 | ret = 0; |
63eb9546 JFM |
948 | out: |
949 | mutex_unlock(&gspca_dev->queue_lock); | |
950 | return ret; | |
951 | } | |
952 | ||
11c635a2 HG |
953 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
954 | struct v4l2_frmsizeenum *fsize) | |
955 | { | |
956 | struct gspca_dev *gspca_dev = priv; | |
957 | int i; | |
958 | __u32 index = 0; | |
959 | ||
960 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
961 | if (fsize->pixel_format != | |
962 | gspca_dev->cam.cam_mode[i].pixelformat) | |
963 | continue; | |
964 | ||
965 | if (fsize->index == index) { | |
966 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
967 | fsize->discrete.width = | |
968 | gspca_dev->cam.cam_mode[i].width; | |
969 | fsize->discrete.height = | |
970 | gspca_dev->cam.cam_mode[i].height; | |
971 | return 0; | |
972 | } | |
973 | index++; | |
974 | } | |
975 | ||
976 | return -EINVAL; | |
977 | } | |
978 | ||
d0182306 | 979 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 980 | { |
d0182306 | 981 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 982 | |
d0182306 | 983 | PDEBUG(D_STREAM, "device released"); |
6b060ffe FZ |
984 | |
985 | kfree(gspca_dev->usb_buf); | |
986 | kfree(gspca_dev); | |
987 | } | |
988 | ||
bec43661 | 989 | static int dev_open(struct file *file) |
63eb9546 JFM |
990 | { |
991 | struct gspca_dev *gspca_dev; | |
992 | int ret; | |
993 | ||
d43fa32f | 994 | PDEBUG(D_STREAM, "%s open", current->comm); |
a12ca6a6 | 995 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
996 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
997 | return -ERESTARTSYS; | |
63eb9546 JFM |
998 | if (!gspca_dev->present) { |
999 | ret = -ENODEV; | |
1000 | goto out; | |
1001 | } | |
1002 | ||
012d6b02 | 1003 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
1004 | ret = -EBUSY; |
1005 | goto out; | |
1006 | } | |
5c4fa002 JFM |
1007 | |
1008 | /* protect the subdriver against rmmod */ | |
1009 | if (!try_module_get(gspca_dev->module)) { | |
1010 | ret = -ENODEV; | |
1011 | goto out; | |
1012 | } | |
1013 | ||
63eb9546 | 1014 | gspca_dev->users++; |
6b060ffe | 1015 | |
63eb9546 | 1016 | file->private_data = gspca_dev; |
335b3f88 | 1017 | #ifdef GSPCA_DEBUG |
63eb9546 | 1018 | /* activate the v4l2 debug */ |
d43fa32f | 1019 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 1020 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 1021 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 1022 | else |
a12ca6a6 | 1023 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 1024 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 1025 | #endif |
012d6b02 | 1026 | ret = 0; |
63eb9546 JFM |
1027 | out: |
1028 | mutex_unlock(&gspca_dev->queue_lock); | |
1029 | if (ret != 0) | |
1030 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
1031 | else | |
d43fa32f | 1032 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
1033 | return ret; |
1034 | } | |
1035 | ||
bec43661 | 1036 | static int dev_close(struct file *file) |
63eb9546 JFM |
1037 | { |
1038 | struct gspca_dev *gspca_dev = file->private_data; | |
1039 | ||
d43fa32f | 1040 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
1041 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1042 | return -ERESTARTSYS; | |
1043 | gspca_dev->users--; | |
e2997a72 | 1044 | |
5b77ae77 | 1045 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1046 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
1047 | if (gspca_dev->streaming) { |
1048 | mutex_lock(&gspca_dev->usb_lock); | |
1049 | gspca_stream_off(gspca_dev); | |
1050 | mutex_unlock(&gspca_dev->usb_lock); | |
1051 | } | |
4aa0d037 | 1052 | frame_free(gspca_dev); |
efab8211 | 1053 | gspca_dev->capt_file = NULL; |
d43fa32f | 1054 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 1055 | } |
d43fa32f | 1056 | file->private_data = NULL; |
5c4fa002 | 1057 | module_put(gspca_dev->module); |
63eb9546 | 1058 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1059 | |
d43fa32f | 1060 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1061 | |
63eb9546 JFM |
1062 | return 0; |
1063 | } | |
1064 | ||
1065 | static int vidioc_querycap(struct file *file, void *priv, | |
1066 | struct v4l2_capability *cap) | |
1067 | { | |
1068 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 1069 | int ret; |
63eb9546 | 1070 | |
090264e5 JFM |
1071 | /* protect the access to the usb device */ |
1072 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1073 | return -ERESTARTSYS; | |
1074 | if (!gspca_dev->present) { | |
1075 | ret = -ENODEV; | |
1076 | goto out; | |
1077 | } | |
63eb9546 | 1078 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); |
c6edaf16 JFM |
1079 | if (gspca_dev->dev->product != NULL) { |
1080 | strncpy(cap->card, gspca_dev->dev->product, | |
1081 | sizeof cap->card); | |
1082 | } else { | |
1083 | snprintf(cap->card, sizeof cap->card, | |
1084 | "USB Camera (%04x:%04x)", | |
1085 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1086 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1087 | } | |
5932028f | 1088 | usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info)); |
63eb9546 JFM |
1089 | cap->version = DRIVER_VERSION_NUMBER; |
1090 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
1091 | | V4L2_CAP_STREAMING | |
1092 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
1093 | ret = 0; |
1094 | out: | |
1095 | mutex_unlock(&gspca_dev->usb_lock); | |
1096 | return ret; | |
63eb9546 JFM |
1097 | } |
1098 | ||
a0001a28 HG |
1099 | static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev, |
1100 | int id) | |
1101 | { | |
1102 | const struct ctrl *ctrls; | |
1103 | int i; | |
1104 | ||
1105 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1106 | i < gspca_dev->sd_desc->nctrls; | |
1107 | i++, ctrls++) { | |
1108 | if (gspca_dev->ctrl_dis & (1 << i)) | |
1109 | continue; | |
1110 | if (id == ctrls->qctrl.id) | |
1111 | return ctrls; | |
1112 | } | |
1113 | return NULL; | |
1114 | } | |
1115 | ||
63eb9546 JFM |
1116 | static int vidioc_queryctrl(struct file *file, void *priv, |
1117 | struct v4l2_queryctrl *q_ctrl) | |
1118 | { | |
1119 | struct gspca_dev *gspca_dev = priv; | |
a0001a28 HG |
1120 | const struct ctrl *ctrls; |
1121 | int i; | |
6a7eba24 JFM |
1122 | u32 id; |
1123 | ||
a0001a28 | 1124 | ctrls = NULL; |
6a7eba24 JFM |
1125 | id = q_ctrl->id; |
1126 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1127 | id &= V4L2_CTRL_ID_MASK; | |
1128 | id++; | |
1129 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
a0001a28 | 1130 | if (gspca_dev->ctrl_dis & (1 << i)) |
f50ba1be | 1131 | continue; |
b8bfb5fb | 1132 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be | 1133 | continue; |
b8bfb5fb | 1134 | if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id |
a0001a28 | 1135 | > ctrls->qctrl.id) |
b8bfb5fb | 1136 | continue; |
a0001a28 | 1137 | ctrls = &gspca_dev->sd_desc->ctrls[i]; |
63eb9546 | 1138 | } |
a0001a28 HG |
1139 | } else { |
1140 | ctrls = get_ctrl(gspca_dev, id); | |
63eb9546 | 1141 | } |
a0001a28 | 1142 | if (ctrls == NULL) |
f50ba1be | 1143 | return -EINVAL; |
a0001a28 | 1144 | memcpy(q_ctrl, ctrls, sizeof *q_ctrl); |
f50ba1be | 1145 | return 0; |
63eb9546 JFM |
1146 | } |
1147 | ||
1148 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1149 | struct v4l2_control *ctrl) | |
1150 | { | |
1151 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1152 | const struct ctrl *ctrls; |
a0001a28 | 1153 | int ret; |
63eb9546 | 1154 | |
a0001a28 HG |
1155 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1156 | if (ctrls == NULL) | |
1157 | return -EINVAL; | |
1158 | ||
1159 | if (ctrl->value < ctrls->qctrl.minimum | |
1160 | || ctrl->value > ctrls->qctrl.maximum) | |
1161 | return -ERANGE; | |
1162 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
1163 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1164 | return -ERESTARTSYS; | |
1165 | if (gspca_dev->present) | |
1166 | ret = ctrls->set(gspca_dev, ctrl->value); | |
1167 | else | |
1168 | ret = -ENODEV; | |
1169 | mutex_unlock(&gspca_dev->usb_lock); | |
1170 | return ret; | |
63eb9546 JFM |
1171 | } |
1172 | ||
1173 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1174 | struct v4l2_control *ctrl) | |
1175 | { | |
1176 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1177 | const struct ctrl *ctrls; |
a0001a28 | 1178 | int ret; |
63eb9546 | 1179 | |
a0001a28 HG |
1180 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1181 | if (ctrls == NULL) | |
1182 | return -EINVAL; | |
1183 | ||
1184 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1185 | return -ERESTARTSYS; | |
1186 | if (gspca_dev->present) | |
1187 | ret = ctrls->get(gspca_dev, &ctrl->value); | |
1188 | else | |
1189 | ret = -ENODEV; | |
1190 | mutex_unlock(&gspca_dev->usb_lock); | |
1191 | return ret; | |
63eb9546 JFM |
1192 | } |
1193 | ||
f955c4fc JFM |
1194 | /*fixme: have an audio flag in gspca_dev?*/ |
1195 | static int vidioc_s_audio(struct file *file, void *priv, | |
1196 | struct v4l2_audio *audio) | |
1197 | { | |
1198 | if (audio->index != 0) | |
1199 | return -EINVAL; | |
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int vidioc_g_audio(struct file *file, void *priv, | |
1204 | struct v4l2_audio *audio) | |
1205 | { | |
f955c4fc JFM |
1206 | strcpy(audio->name, "Microphone"); |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | static int vidioc_enumaudio(struct file *file, void *priv, | |
1211 | struct v4l2_audio *audio) | |
1212 | { | |
1213 | if (audio->index != 0) | |
1214 | return -EINVAL; | |
1215 | ||
1216 | strcpy(audio->name, "Microphone"); | |
1217 | audio->capability = 0; | |
1218 | audio->mode = 0; | |
1219 | return 0; | |
1220 | } | |
1221 | ||
63eb9546 JFM |
1222 | static int vidioc_querymenu(struct file *file, void *priv, |
1223 | struct v4l2_querymenu *qmenu) | |
1224 | { | |
1225 | struct gspca_dev *gspca_dev = priv; | |
1226 | ||
1227 | if (!gspca_dev->sd_desc->querymenu) | |
1228 | return -EINVAL; | |
1229 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1230 | } | |
1231 | ||
1232 | static int vidioc_enum_input(struct file *file, void *priv, | |
1233 | struct v4l2_input *input) | |
1234 | { | |
1235 | struct gspca_dev *gspca_dev = priv; | |
1236 | ||
1237 | if (input->index != 0) | |
1238 | return -EINVAL; | |
63eb9546 | 1239 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1240 | input->status = gspca_dev->cam.input_flags; |
63eb9546 JFM |
1241 | strncpy(input->name, gspca_dev->sd_desc->name, |
1242 | sizeof input->name); | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1247 | { | |
1248 | *i = 0; | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1253 | { | |
1254 | if (i > 0) | |
1255 | return -EINVAL; | |
1256 | return (0); | |
1257 | } | |
1258 | ||
1259 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1260 | struct v4l2_requestbuffers *rb) | |
1261 | { | |
1262 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1263 | int i, ret = 0; |
63eb9546 | 1264 | |
d43fa32f | 1265 | switch (rb->memory) { |
5b77ae77 | 1266 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1267 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1268 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1269 | break; |
d43fa32f | 1270 | default: |
63eb9546 | 1271 | return -EINVAL; |
d43fa32f | 1272 | } |
e2997a72 HG |
1273 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1274 | return -ERESTARTSYS; | |
d43fa32f | 1275 | |
5b77ae77 JFM |
1276 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1277 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1278 | ret = -EBUSY; |
1279 | goto out; | |
1280 | } | |
d43fa32f | 1281 | |
5b77ae77 JFM |
1282 | /* only one file may do the capture */ |
1283 | if (gspca_dev->capt_file != NULL | |
1284 | && gspca_dev->capt_file != file) { | |
1285 | ret = -EBUSY; | |
1286 | goto out; | |
1287 | } | |
1288 | ||
1289 | /* if allocated, the buffers must not be mapped */ | |
1290 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1291 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1292 | ret = -EBUSY; |
1293 | goto out; | |
1294 | } | |
5b77ae77 JFM |
1295 | } |
1296 | ||
1297 | /* stop streaming */ | |
1298 | if (gspca_dev->streaming) { | |
1299 | mutex_lock(&gspca_dev->usb_lock); | |
1300 | gspca_stream_off(gspca_dev); | |
1301 | mutex_unlock(&gspca_dev->usb_lock); | |
1302 | } | |
1303 | ||
1304 | /* free the previous allocated buffers, if any */ | |
1305 | if (gspca_dev->nframes != 0) { | |
1306 | frame_free(gspca_dev); | |
1307 | gspca_dev->capt_file = NULL; | |
1308 | } | |
1309 | if (rb->count == 0) /* unrequest */ | |
1310 | goto out; | |
1311 | gspca_dev->memory = rb->memory; | |
1312 | ret = frame_alloc(gspca_dev, rb->count); | |
1313 | if (ret == 0) { | |
1314 | rb->count = gspca_dev->nframes; | |
1315 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1316 | } |
1317 | out: | |
63eb9546 JFM |
1318 | mutex_unlock(&gspca_dev->queue_lock); |
1319 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | static int vidioc_querybuf(struct file *file, void *priv, | |
1324 | struct v4l2_buffer *v4l2_buf) | |
1325 | { | |
1326 | struct gspca_dev *gspca_dev = priv; | |
1327 | struct gspca_frame *frame; | |
1328 | ||
13752bd9 | 1329 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1330 | || v4l2_buf->index >= gspca_dev->nframes) |
1331 | return -EINVAL; | |
1332 | ||
1333 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1334 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1335 | return 0; | |
1336 | } | |
1337 | ||
1338 | static int vidioc_streamon(struct file *file, void *priv, | |
1339 | enum v4l2_buf_type buf_type) | |
1340 | { | |
1341 | struct gspca_dev *gspca_dev = priv; | |
1342 | int ret; | |
1343 | ||
63eb9546 JFM |
1344 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1345 | return -EINVAL; | |
e2997a72 HG |
1346 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1347 | return -ERESTARTSYS; | |
090264e5 | 1348 | |
1edabe71 JFM |
1349 | if (gspca_dev->nframes == 0 |
1350 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1351 | ret = -EINVAL; |
1352 | goto out; | |
1353 | } | |
1354 | if (!gspca_dev->streaming) { | |
1355 | ret = gspca_init_transfer(gspca_dev); | |
1356 | if (ret < 0) | |
1357 | goto out; | |
1358 | } | |
335b3f88 | 1359 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1360 | if (gspca_debug & D_STREAM) { |
1361 | PDEBUG_MODE("stream on OK", | |
1362 | gspca_dev->pixfmt, | |
1363 | gspca_dev->width, | |
1364 | gspca_dev->height); | |
1365 | } | |
1366 | #endif | |
e2997a72 | 1367 | ret = 0; |
63eb9546 JFM |
1368 | out: |
1369 | mutex_unlock(&gspca_dev->queue_lock); | |
1370 | return ret; | |
1371 | } | |
1372 | ||
1373 | static int vidioc_streamoff(struct file *file, void *priv, | |
1374 | enum v4l2_buf_type buf_type) | |
1375 | { | |
1376 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1377 | int i, ret; |
63eb9546 | 1378 | |
63eb9546 JFM |
1379 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1380 | return -EINVAL; | |
4aa0d037 JFM |
1381 | if (!gspca_dev->streaming) |
1382 | return 0; | |
1383 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1384 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1385 | |
1386 | /* stop streaming */ | |
4aa0d037 JFM |
1387 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1388 | ret = -ERESTARTSYS; | |
1389 | goto out; | |
63eb9546 | 1390 | } |
4aa0d037 | 1391 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1392 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1393 | |
1394 | /* empty the application queues */ | |
1395 | for (i = 0; i < gspca_dev->nframes; i++) | |
1396 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1397 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1398 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1399 | gspca_dev->sequence = 0; | |
5b77ae77 | 1400 | ret = 0; |
4aa0d037 JFM |
1401 | out: |
1402 | mutex_unlock(&gspca_dev->queue_lock); | |
1403 | return ret; | |
63eb9546 JFM |
1404 | } |
1405 | ||
1406 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1407 | struct v4l2_jpegcompression *jpegcomp) | |
1408 | { | |
1409 | struct gspca_dev *gspca_dev = priv; | |
1410 | int ret; | |
1411 | ||
1412 | if (!gspca_dev->sd_desc->get_jcomp) | |
1413 | return -EINVAL; | |
e2997a72 HG |
1414 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1415 | return -ERESTARTSYS; | |
090264e5 JFM |
1416 | if (gspca_dev->present) |
1417 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1418 | else | |
1419 | ret = -ENODEV; | |
63eb9546 JFM |
1420 | mutex_unlock(&gspca_dev->usb_lock); |
1421 | return ret; | |
1422 | } | |
1423 | ||
1424 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1425 | struct v4l2_jpegcompression *jpegcomp) | |
1426 | { | |
1427 | struct gspca_dev *gspca_dev = priv; | |
1428 | int ret; | |
1429 | ||
63eb9546 JFM |
1430 | if (!gspca_dev->sd_desc->set_jcomp) |
1431 | return -EINVAL; | |
f86d4a91 JP |
1432 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1433 | return -ERESTARTSYS; | |
090264e5 JFM |
1434 | if (gspca_dev->present) |
1435 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1436 | else | |
1437 | ret = -ENODEV; | |
63eb9546 JFM |
1438 | mutex_unlock(&gspca_dev->usb_lock); |
1439 | return ret; | |
1440 | } | |
1441 | ||
1442 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1443 | struct v4l2_streamparm *parm) | |
1444 | { | |
1445 | struct gspca_dev *gspca_dev = priv; | |
1446 | ||
63eb9546 | 1447 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1448 | |
1449 | if (gspca_dev->sd_desc->get_streamparm) { | |
1450 | int ret; | |
1451 | ||
1452 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1453 | return -ERESTARTSYS; | |
090264e5 JFM |
1454 | if (gspca_dev->present) |
1455 | ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, | |
1456 | parm); | |
1457 | else | |
1458 | ret = -ENODEV; | |
627a5ef7 JP |
1459 | mutex_unlock(&gspca_dev->usb_lock); |
1460 | return ret; | |
1461 | } | |
1462 | ||
63eb9546 JFM |
1463 | return 0; |
1464 | } | |
1465 | ||
1466 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1467 | struct v4l2_streamparm *parm) | |
1468 | { | |
1469 | struct gspca_dev *gspca_dev = priv; | |
1470 | int n; | |
1471 | ||
63eb9546 JFM |
1472 | n = parm->parm.capture.readbuffers; |
1473 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1474 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1475 | else | |
1476 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1477 | |
1478 | if (gspca_dev->sd_desc->set_streamparm) { | |
1479 | int ret; | |
1480 | ||
1481 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1482 | return -ERESTARTSYS; | |
090264e5 JFM |
1483 | if (gspca_dev->present) |
1484 | ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, | |
1485 | parm); | |
1486 | else | |
1487 | ret = -ENODEV; | |
627a5ef7 JP |
1488 | mutex_unlock(&gspca_dev->usb_lock); |
1489 | return ret; | |
1490 | } | |
1491 | ||
63eb9546 JFM |
1492 | return 0; |
1493 | } | |
1494 | ||
1495 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1496 | static int vidiocgmbuf(struct file *file, void *priv, | |
1497 | struct video_mbuf *mbuf) | |
1498 | { | |
1499 | struct gspca_dev *gspca_dev = file->private_data; | |
1500 | int i; | |
1501 | ||
1502 | PDEBUG(D_STREAM, "cgmbuf"); | |
1503 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1504 | int ret; |
6a7eba24 JFM |
1505 | |
1506 | { | |
1507 | struct v4l2_format fmt; | |
1508 | ||
6a7eba24 JFM |
1509 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1510 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1511 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1512 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1513 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1514 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1515 | if (ret != 0) |
1516 | return ret; | |
1517 | } | |
1518 | { | |
1519 | struct v4l2_requestbuffers rb; | |
1520 | ||
1521 | memset(&rb, 0, sizeof rb); | |
1522 | rb.count = 4; | |
1523 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1524 | rb.memory = V4L2_MEMORY_MMAP; | |
1525 | ret = vidioc_reqbufs(file, priv, &rb); | |
1526 | if (ret != 0) | |
1527 | return ret; | |
1528 | } | |
63eb9546 JFM |
1529 | } |
1530 | mbuf->frames = gspca_dev->nframes; | |
1531 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1532 | for (i = 0; i < mbuf->frames; i++) | |
1533 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1534 | return 0; | |
1535 | } | |
1536 | #endif | |
1537 | ||
1538 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1539 | { | |
1540 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1541 | struct gspca_frame *frame; |
63eb9546 JFM |
1542 | struct page *page; |
1543 | unsigned long addr, start, size; | |
1544 | int i, ret; | |
63eb9546 JFM |
1545 | |
1546 | start = vma->vm_start; | |
1547 | size = vma->vm_end - vma->vm_start; | |
1548 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1549 | ||
e2997a72 HG |
1550 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1551 | return -ERESTARTSYS; | |
63eb9546 JFM |
1552 | if (!gspca_dev->present) { |
1553 | ret = -ENODEV; | |
4aa0d037 JFM |
1554 | goto out; |
1555 | } | |
1556 | if (gspca_dev->capt_file != file) { | |
1557 | ret = -EINVAL; | |
1558 | goto out; | |
63eb9546 JFM |
1559 | } |
1560 | ||
efab8211 | 1561 | frame = NULL; |
63eb9546 JFM |
1562 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1563 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1564 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1565 | break; | |
1566 | } | |
1567 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1568 | == vma->vm_pgoff) { | |
1569 | frame = &gspca_dev->frame[i]; | |
1570 | break; | |
1571 | } | |
1572 | } | |
efab8211 | 1573 | if (frame == NULL) { |
63eb9546 JFM |
1574 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1575 | ret = -EINVAL; | |
4aa0d037 | 1576 | goto out; |
63eb9546 JFM |
1577 | } |
1578 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1579 | /* v4l1 maps all the buffers */ |
1580 | if (i != 0 | |
1581 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1582 | #endif |
ac0d6df6 | 1583 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1584 | PDEBUG(D_STREAM, "mmap bad size"); |
1585 | ret = -EINVAL; | |
4aa0d037 | 1586 | goto out; |
63eb9546 JFM |
1587 | } |
1588 | ||
1589 | /* | |
1590 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1591 | * device. It also prevents the region from being core dumped. | |
1592 | */ | |
1593 | vma->vm_flags |= VM_IO; | |
1594 | ||
1595 | addr = (unsigned long) frame->data; | |
1596 | while (size > 0) { | |
1597 | page = vmalloc_to_page((void *) addr); | |
1598 | ret = vm_insert_page(vma, start, page); | |
1599 | if (ret < 0) | |
4aa0d037 | 1600 | goto out; |
63eb9546 JFM |
1601 | start += PAGE_SIZE; |
1602 | addr += PAGE_SIZE; | |
1603 | size -= PAGE_SIZE; | |
1604 | } | |
1605 | ||
1606 | vma->vm_ops = &gspca_vm_ops; | |
1607 | vma->vm_private_data = frame; | |
1608 | gspca_vm_open(vma); | |
e2997a72 | 1609 | ret = 0; |
4aa0d037 | 1610 | out: |
63eb9546 JFM |
1611 | mutex_unlock(&gspca_dev->queue_lock); |
1612 | return ret; | |
1613 | } | |
1614 | ||
63eb9546 JFM |
1615 | /* |
1616 | * wait for a video frame | |
1617 | * | |
1618 | * If a frame is ready, its index is returned. | |
1619 | */ | |
d43fa32f | 1620 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1621 | int nonblock_ing) |
1622 | { | |
1623 | struct gspca_frame *frame; | |
1624 | int i, j, ret; | |
1625 | ||
d43fa32f | 1626 | /* check if a frame is ready */ |
63eb9546 JFM |
1627 | i = gspca_dev->fr_o; |
1628 | j = gspca_dev->fr_queue[i]; | |
1629 | frame = &gspca_dev->frame[j]; | |
63eb9546 | 1630 | |
181b704f HG |
1631 | if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) { |
1632 | if (nonblock_ing) | |
1633 | return -EAGAIN; | |
1634 | ||
1635 | /* wait till a frame is ready */ | |
4aa0d037 | 1636 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
181b704f HG |
1637 | (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) || |
1638 | !gspca_dev->streaming || !gspca_dev->present, | |
1639 | msecs_to_jiffies(3000)); | |
1640 | if (ret < 0) | |
1641 | return ret; | |
1642 | if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) | |
e2997a72 | 1643 | return -EIO; |
63eb9546 | 1644 | } |
181b704f | 1645 | |
63eb9546 JFM |
1646 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1647 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1648 | gspca_dev->fr_q, | |
1649 | gspca_dev->fr_i, | |
1650 | gspca_dev->fr_o); | |
e2997a72 | 1651 | |
739570bb JFM |
1652 | if (gspca_dev->sd_desc->dq_callback) { |
1653 | mutex_lock(&gspca_dev->usb_lock); | |
090264e5 JFM |
1654 | if (gspca_dev->present) |
1655 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1656 | mutex_unlock(&gspca_dev->usb_lock); |
1657 | } | |
63eb9546 JFM |
1658 | return j; |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * dequeue a video buffer | |
1663 | * | |
1664 | * If nonblock_ing is false, block until a buffer is available. | |
1665 | */ | |
1666 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1667 | struct v4l2_buffer *v4l2_buf) | |
1668 | { | |
1669 | struct gspca_dev *gspca_dev = priv; | |
1670 | struct gspca_frame *frame; | |
1671 | int i, ret; | |
1672 | ||
1673 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 | 1674 | if (v4l2_buf->memory != gspca_dev->memory) |
63eb9546 | 1675 | return -EINVAL; |
5b77ae77 | 1676 | |
090264e5 JFM |
1677 | if (!gspca_dev->present) |
1678 | return -ENODEV; | |
1679 | ||
5b77ae77 JFM |
1680 | /* if not streaming, be sure the application will not loop forever */ |
1681 | if (!(file->f_flags & O_NONBLOCK) | |
1682 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1683 | return -EINVAL; |
1684 | ||
5b77ae77 JFM |
1685 | /* only the capturing file may dequeue */ |
1686 | if (gspca_dev->capt_file != file) | |
1687 | return -EINVAL; | |
1688 | ||
1689 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1690 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1691 | return -ERESTARTSYS; | |
1692 | ||
d43fa32f | 1693 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1694 | if (ret < 0) |
4aa0d037 | 1695 | goto out; |
63eb9546 JFM |
1696 | i = ret; /* frame index */ |
1697 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1698 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1699 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1700 | frame->data, |
1701 | frame->v4l2_buf.bytesused)) { | |
1702 | PDEBUG(D_ERR|D_STREAM, | |
1703 | "dqbuf cp to user failed"); | |
1704 | ret = -EFAULT; | |
1705 | goto out; | |
1706 | } | |
1707 | } | |
63eb9546 JFM |
1708 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1709 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1710 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1711 | ret = 0; | |
4aa0d037 | 1712 | out: |
63eb9546 JFM |
1713 | mutex_unlock(&gspca_dev->read_lock); |
1714 | return ret; | |
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * queue a video buffer | |
1719 | * | |
1720 | * Attempting to queue a buffer that has already been | |
1721 | * queued will return -EINVAL. | |
1722 | */ | |
1723 | static int vidioc_qbuf(struct file *file, void *priv, | |
1724 | struct v4l2_buffer *v4l2_buf) | |
1725 | { | |
1726 | struct gspca_dev *gspca_dev = priv; | |
1727 | struct gspca_frame *frame; | |
1728 | int i, index, ret; | |
1729 | ||
1730 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1731 | |
5b77ae77 JFM |
1732 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1733 | return -ERESTARTSYS; | |
1734 | ||
63eb9546 JFM |
1735 | index = v4l2_buf->index; |
1736 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1737 | PDEBUG(D_FRAM, |
63eb9546 | 1738 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1739 | ret = -EINVAL; |
1740 | goto out; | |
63eb9546 | 1741 | } |
5b77ae77 | 1742 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1743 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1744 | ret = -EINVAL; |
1745 | goto out; | |
63eb9546 | 1746 | } |
e2997a72 | 1747 | |
5b77ae77 | 1748 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1749 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1750 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1751 | ret = -EINVAL; |
1752 | goto out; | |
1753 | } | |
1754 | ||
1755 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1756 | |
d43fa32f | 1757 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1758 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1759 | frame->v4l2_buf.length = v4l2_buf->length; | |
1760 | } | |
1761 | ||
1762 | /* put the buffer in the 'queued' queue */ | |
1763 | i = gspca_dev->fr_q; | |
1764 | gspca_dev->fr_queue[i] = index; | |
1765 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1766 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1767 | gspca_dev->fr_q, | |
1768 | gspca_dev->fr_i, | |
1769 | gspca_dev->fr_o); | |
1770 | ||
1771 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1772 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1773 | ret = 0; | |
1774 | out: | |
1775 | mutex_unlock(&gspca_dev->queue_lock); | |
1776 | return ret; | |
1777 | } | |
1778 | ||
d43fa32f JFM |
1779 | /* |
1780 | * allocate the resources for read() | |
1781 | */ | |
1782 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1783 | struct file *file) | |
63eb9546 | 1784 | { |
63eb9546 | 1785 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1786 | int i, ret; |
63eb9546 | 1787 | |
d43fa32f | 1788 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1789 | if (gspca_dev->nframes == 0) { |
1790 | struct v4l2_requestbuffers rb; | |
1791 | ||
1792 | memset(&rb, 0, sizeof rb); | |
1793 | rb.count = gspca_dev->nbufread; | |
1794 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1795 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1796 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1797 | if (ret != 0) { | |
d43fa32f | 1798 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1799 | return ret; |
1800 | } | |
1801 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1802 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1803 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1804 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1805 | v4l2_buf.index = i; | |
63eb9546 JFM |
1806 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1807 | if (ret != 0) { | |
1808 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1809 | return ret; | |
1810 | } | |
1811 | } | |
d43fa32f JFM |
1812 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1813 | } | |
4aa0d037 | 1814 | |
d43fa32f JFM |
1815 | /* start streaming */ |
1816 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1817 | if (ret != 0) | |
1818 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1819 | return ret; | |
1820 | } | |
1821 | ||
1822 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1823 | { | |
1824 | struct gspca_dev *gspca_dev = file->private_data; | |
1825 | int i, ret; | |
1826 | ||
1827 | PDEBUG(D_FRAM, "poll"); | |
1828 | ||
1829 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 1830 | |
5b77ae77 JFM |
1831 | /* if reqbufs is not done, the user would use read() */ |
1832 | if (gspca_dev->nframes == 0) { | |
1833 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1834 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1835 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1836 | if (ret != 0) |
1837 | return POLLERR; | |
63eb9546 JFM |
1838 | } |
1839 | ||
d43fa32f JFM |
1840 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1841 | return POLLERR; | |
d43fa32f | 1842 | |
5b77ae77 | 1843 | /* check the next incoming buffer */ |
d43fa32f JFM |
1844 | i = gspca_dev->fr_o; |
1845 | i = gspca_dev->fr_queue[i]; | |
1846 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1847 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1848 | else | |
1849 | ret = 0; | |
d43fa32f | 1850 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
1851 | if (!gspca_dev->present) |
1852 | return POLLHUP; | |
d43fa32f JFM |
1853 | return ret; |
1854 | } | |
1855 | ||
1856 | static ssize_t dev_read(struct file *file, char __user *data, | |
1857 | size_t count, loff_t *ppos) | |
1858 | { | |
1859 | struct gspca_dev *gspca_dev = file->private_data; | |
1860 | struct gspca_frame *frame; | |
1861 | struct v4l2_buffer v4l2_buf; | |
1862 | struct timeval timestamp; | |
82643d0e | 1863 | int n, ret, ret2; |
d43fa32f | 1864 | |
a9e11134 | 1865 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1866 | if (!gspca_dev->present) |
1867 | return -ENODEV; | |
1868 | switch (gspca_dev->memory) { | |
1869 | case GSPCA_MEMORY_NO: /* first time */ | |
1870 | ret = read_alloc(gspca_dev, file); | |
1871 | if (ret != 0) | |
1872 | return ret; | |
1873 | break; | |
1874 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1875 | if (gspca_dev->capt_file == file) |
1876 | break; | |
1877 | /* fall thru */ | |
d43fa32f JFM |
1878 | default: |
1879 | return -EINVAL; | |
1880 | } | |
1881 | ||
63eb9546 JFM |
1882 | /* get a frame */ |
1883 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1884 | timestamp.tv_sec--; | |
82643d0e JFM |
1885 | n = 2; |
1886 | for (;;) { | |
63eb9546 JFM |
1887 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1888 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1889 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1890 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1891 | if (ret != 0) { | |
1892 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1893 | return ret; | |
1894 | } | |
1895 | ||
1896 | /* if the process slept for more than 1 second, | |
219423c1 | 1897 | * get a newer frame */ |
63eb9546 | 1898 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1899 | if (--n < 0) |
1900 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1901 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1902 | break; | |
1903 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1904 | if (ret != 0) { | |
1905 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1906 | return ret; | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | /* copy the frame */ | |
ac0d6df6 JFM |
1911 | if (count > frame->v4l2_buf.bytesused) |
1912 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1913 | ret = copy_to_user(data, frame->data, count); |
1914 | if (ret != 0) { | |
1915 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1916 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1917 | ret = -EFAULT; |
1918 | goto out; | |
1919 | } | |
1920 | ret = count; | |
1921 | out: | |
1922 | /* in each case, requeue the buffer */ | |
1923 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1924 | if (ret2 != 0) | |
1925 | return ret2; | |
1926 | return ret; | |
1927 | } | |
1928 | ||
bec43661 | 1929 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
1930 | .owner = THIS_MODULE, |
1931 | .open = dev_open, | |
1932 | .release = dev_close, | |
1933 | .read = dev_read, | |
1934 | .mmap = dev_mmap, | |
bec43661 | 1935 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
1936 | .poll = dev_poll, |
1937 | }; | |
1938 | ||
a399810c | 1939 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1940 | .vidioc_querycap = vidioc_querycap, |
1941 | .vidioc_dqbuf = vidioc_dqbuf, | |
1942 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1943 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1944 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1945 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1946 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1947 | .vidioc_streamon = vidioc_streamon, |
1948 | .vidioc_queryctrl = vidioc_queryctrl, | |
1949 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1950 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
f955c4fc JFM |
1951 | .vidioc_g_audio = vidioc_g_audio, |
1952 | .vidioc_s_audio = vidioc_s_audio, | |
1953 | .vidioc_enumaudio = vidioc_enumaudio, | |
63eb9546 JFM |
1954 | .vidioc_querymenu = vidioc_querymenu, |
1955 | .vidioc_enum_input = vidioc_enum_input, | |
1956 | .vidioc_g_input = vidioc_g_input, | |
1957 | .vidioc_s_input = vidioc_s_input, | |
1958 | .vidioc_reqbufs = vidioc_reqbufs, | |
1959 | .vidioc_querybuf = vidioc_querybuf, | |
1960 | .vidioc_streamoff = vidioc_streamoff, | |
1961 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1962 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1963 | .vidioc_g_parm = vidioc_g_parm, | |
1964 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 1965 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
af1d9afa BJ |
1966 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
1967 | .vidioc_g_register = vidioc_g_register, | |
1968 | .vidioc_s_register = vidioc_s_register, | |
1969 | #endif | |
1970 | .vidioc_g_chip_ident = vidioc_g_chip_ident, | |
63eb9546 JFM |
1971 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1972 | .vidiocgmbuf = vidiocgmbuf, | |
1973 | #endif | |
1974 | }; | |
1975 | ||
a399810c HV |
1976 | static struct video_device gspca_template = { |
1977 | .name = "gspca main driver", | |
a399810c HV |
1978 | .fops = &dev_fops, |
1979 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 1980 | .release = gspca_release, |
a399810c HV |
1981 | .minor = -1, |
1982 | }; | |
1983 | ||
63eb9546 JFM |
1984 | /* |
1985 | * probe and create a new gspca device | |
1986 | * | |
1987 | * This function must be called by the sub-driver when it is | |
1988 | * called for probing a new device. | |
1989 | */ | |
1990 | int gspca_dev_probe(struct usb_interface *intf, | |
1991 | const struct usb_device_id *id, | |
1992 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1993 | int dev_size, |
1994 | struct module *module) | |
63eb9546 JFM |
1995 | { |
1996 | struct usb_interface_descriptor *interface; | |
1997 | struct gspca_dev *gspca_dev; | |
1998 | struct usb_device *dev = interface_to_usbdev(intf); | |
1999 | int ret; | |
63eb9546 | 2000 | |
6a7eba24 | 2001 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
2002 | |
2003 | /* we don't handle multi-config cameras */ | |
2004 | if (dev->descriptor.bNumConfigurations != 1) | |
2005 | return -ENODEV; | |
2006 | interface = &intf->cur_altsetting->desc; | |
2007 | if (interface->bInterfaceNumber > 0) | |
2008 | return -ENODEV; | |
2009 | ||
2010 | /* create the device */ | |
2011 | if (dev_size < sizeof *gspca_dev) | |
2012 | dev_size = sizeof *gspca_dev; | |
2013 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2014 | if (!gspca_dev) { |
63eb9546 | 2015 | err("couldn't kzalloc gspca struct"); |
e293e599 | 2016 | return -ENOMEM; |
63eb9546 | 2017 | } |
8295d99e JFM |
2018 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2019 | if (!gspca_dev->usb_buf) { | |
2020 | err("out of memory"); | |
e293e599 | 2021 | ret = -ENOMEM; |
8295d99e JFM |
2022 | goto out; |
2023 | } | |
63eb9546 JFM |
2024 | gspca_dev->dev = dev; |
2025 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 2026 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 | 2027 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2028 | gspca_dev->nbufread = 2; |
ff374747 | 2029 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 2030 | |
012d6b02 | 2031 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2032 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2033 | if (ret < 0) |
2034 | goto out; | |
ba38ee8e | 2035 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
2036 | if (ret < 0) |
2037 | goto out; | |
2038 | ret = gspca_set_alt0(gspca_dev); | |
2039 | if (ret < 0) | |
2040 | goto out; | |
2041 | gspca_set_default_mode(gspca_dev); | |
2042 | ||
2043 | mutex_init(&gspca_dev->usb_lock); | |
2044 | mutex_init(&gspca_dev->read_lock); | |
2045 | mutex_init(&gspca_dev->queue_lock); | |
2046 | init_waitqueue_head(&gspca_dev->wq); | |
2047 | ||
2048 | /* init video stuff */ | |
ba38ee8e | 2049 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
24441631 | 2050 | gspca_dev->vdev.parent = &intf->dev; |
5c4fa002 | 2051 | gspca_dev->module = module; |
ee56a4d3 | 2052 | gspca_dev->present = 1; |
a12ca6a6 | 2053 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2054 | VFL_TYPE_GRABBER, |
8d584a53 | 2055 | -1); |
63eb9546 JFM |
2056 | if (ret < 0) { |
2057 | err("video_register_device err %d", ret); | |
2058 | goto out; | |
2059 | } | |
2060 | ||
63eb9546 JFM |
2061 | usb_set_intfdata(intf, gspca_dev); |
2062 | PDEBUG(D_PROBE, "probe ok"); | |
2063 | return 0; | |
2064 | out: | |
e07a1d8a JFM |
2065 | kfree(gspca_dev->usb_buf); |
2066 | kfree(gspca_dev); | |
63eb9546 JFM |
2067 | return ret; |
2068 | } | |
2069 | EXPORT_SYMBOL(gspca_dev_probe); | |
2070 | ||
2071 | /* | |
2072 | * USB disconnection | |
2073 | * | |
2074 | * This function must be called by the sub-driver | |
2075 | * when the device disconnects, after the specific resources are freed. | |
2076 | */ | |
2077 | void gspca_disconnect(struct usb_interface *intf) | |
2078 | { | |
4aa0d037 | 2079 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 2080 | |
ad28127d | 2081 | mutex_lock(&gspca_dev->usb_lock); |
6e4ae872 | 2082 | gspca_dev->present = 0; |
6e4ae872 | 2083 | |
090264e5 JFM |
2084 | if (gspca_dev->streaming) { |
2085 | destroy_urbs(gspca_dev); | |
2086 | wake_up_interruptible(&gspca_dev->wq); | |
2087 | } | |
2088 | ||
2089 | /* the device is freed at exit of this function */ | |
ad28127d | 2090 | gspca_dev->dev = NULL; |
090264e5 JFM |
2091 | mutex_unlock(&gspca_dev->usb_lock); |
2092 | ||
6b060ffe FZ |
2093 | usb_set_intfdata(intf, NULL); |
2094 | ||
a12ca6a6 JFM |
2095 | /* release the device */ |
2096 | /* (this will call gspca_release() immediatly or on last close) */ | |
2097 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 2098 | |
63eb9546 JFM |
2099 | PDEBUG(D_PROBE, "disconnect complete"); |
2100 | } | |
2101 | EXPORT_SYMBOL(gspca_disconnect); | |
2102 | ||
6a709749 JFM |
2103 | #ifdef CONFIG_PM |
2104 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2105 | { | |
2106 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2107 | ||
2108 | if (!gspca_dev->streaming) | |
2109 | return 0; | |
2110 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2111 | if (gspca_dev->sd_desc->stopN) |
2112 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
2113 | destroy_urbs(gspca_dev); |
2114 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
2115 | if (gspca_dev->sd_desc->stop0) |
2116 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2117 | return 0; |
2118 | } | |
2119 | EXPORT_SYMBOL(gspca_suspend); | |
2120 | ||
2121 | int gspca_resume(struct usb_interface *intf) | |
2122 | { | |
2123 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2124 | ||
2125 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
2126 | gspca_dev->sd_desc->init(gspca_dev); |
2127 | if (gspca_dev->streaming) | |
2128 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2129 | return 0; |
6a709749 JFM |
2130 | } |
2131 | EXPORT_SYMBOL(gspca_resume); | |
2132 | #endif | |
dcef3237 HG |
2133 | /* -- cam driver utility functions -- */ |
2134 | ||
2135 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2136 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2137 | ||
2138 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2139 | where changed. */ | |
2140 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2141 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2142 | { | |
2143 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2144 | const struct ctrl *gain_ctrl = NULL; | |
2145 | const struct ctrl *exposure_ctrl = NULL; | |
2146 | const struct ctrl *autogain_ctrl = NULL; | |
2147 | int retval = 0; | |
2148 | ||
2149 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
2150 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
2151 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2152 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2153 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2154 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2155 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2156 | } | |
2157 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2158 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2159 | "on cam without (auto)gain/exposure"); | |
2160 | return 0; | |
2161 | } | |
2162 | ||
2163 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2164 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2165 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2166 | return 0; | |
2167 | ||
2168 | orig_gain = gain; | |
2169 | orig_exposure = exposure; | |
2170 | ||
2171 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2172 | desired lumination fast (with the risc of a slight overshoot) */ | |
2173 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2174 | ||
1c44d81d | 2175 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2176 | avg_lum, desired_avg_lum, steps); |
2177 | ||
2178 | for (i = 0; i < steps; i++) { | |
2179 | if (avg_lum > desired_avg_lum) { | |
2180 | if (gain > gain_knee) | |
2181 | gain--; | |
2182 | else if (exposure > exposure_knee) | |
2183 | exposure--; | |
2184 | else if (gain > gain_ctrl->qctrl.default_value) | |
2185 | gain--; | |
2186 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2187 | exposure--; | |
2188 | else if (gain > gain_ctrl->qctrl.minimum) | |
2189 | gain--; | |
2190 | else | |
2191 | break; | |
2192 | } else { | |
2193 | if (gain < gain_ctrl->qctrl.default_value) | |
2194 | gain++; | |
2195 | else if (exposure < exposure_knee) | |
2196 | exposure++; | |
2197 | else if (gain < gain_knee) | |
2198 | gain++; | |
2199 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2200 | exposure++; | |
2201 | else if (gain < gain_ctrl->qctrl.maximum) | |
2202 | gain++; | |
2203 | else | |
2204 | break; | |
2205 | } | |
2206 | } | |
2207 | ||
2208 | if (gain != orig_gain) { | |
2209 | gain_ctrl->set(gspca_dev, gain); | |
2210 | retval = 1; | |
2211 | } | |
2212 | if (exposure != orig_exposure) { | |
2213 | exposure_ctrl->set(gspca_dev, exposure); | |
2214 | retval = 1; | |
2215 | } | |
2216 | ||
2217 | return retval; | |
2218 | } | |
2219 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2220 | ||
63eb9546 JFM |
2221 | /* -- module insert / remove -- */ |
2222 | static int __init gspca_init(void) | |
2223 | { | |
bb64e86c JFM |
2224 | info("main v%d.%d.%d registered", |
2225 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2226 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2227 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2228 | return 0; |
2229 | } | |
2230 | static void __exit gspca_exit(void) | |
2231 | { | |
2232 | info("main deregistered"); | |
2233 | } | |
2234 | ||
2235 | module_init(gspca_init); | |
2236 | module_exit(gspca_exit); | |
2237 | ||
335b3f88 | 2238 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2239 | module_param_named(debug, gspca_debug, int, 0644); |
2240 | MODULE_PARM_DESC(debug, | |
2241 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2242 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2243 | " 0x0100: v4l2"); | |
6a7eba24 | 2244 | #endif |