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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
4 | * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #define MODULE_NAME "gspca" | |
22 | ||
23 | #include <linux/init.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/pagemap.h> | |
956e42d2 | 31 | #include <linux/io.h> |
63eb9546 | 32 | #include <asm/page.h> |
956e42d2 | 33 | #include <linux/uaccess.h> |
63eb9546 JFM |
34 | #include <linux/jiffies.h> |
35 | ||
36 | #include "gspca.h" | |
37 | ||
d43fa32f JFM |
38 | /* global values */ |
39 | #define DEF_NURBS 2 /* default number of URBs (mmap) */ | |
6a7eba24 | 40 | #define USR_NURBS 5 /* default number of URBs (userptr) */ |
d43fa32f | 41 | |
63eb9546 JFM |
42 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
43 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
c2446b3e JFM |
46 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 1, 5) |
47 | static const char version[] = "2.1.5"; | |
63eb9546 JFM |
48 | |
49 | static int video_nr = -1; | |
50 | ||
d646e701 | 51 | #ifdef CONFIG_VIDEO_ADV_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 | ||
106 | /* | |
d43fa32f | 107 | * fill a video frame from an URB and resubmit |
63eb9546 | 108 | */ |
d43fa32f JFM |
109 | static void fill_frame(struct gspca_dev *gspca_dev, |
110 | struct urb *urb) | |
63eb9546 | 111 | { |
63eb9546 | 112 | struct gspca_frame *frame; |
6a7eba24 | 113 | __u8 *data; /* address of data in the iso message */ |
63eb9546 JFM |
114 | int i, j, len, st; |
115 | cam_pkt_op pkt_scan; | |
116 | ||
6a7eba24 JFM |
117 | if (urb->status != 0) { |
118 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
119 | return; /* disconnection ? */ | |
120 | } | |
63eb9546 JFM |
121 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
122 | for (i = 0; i < urb->number_of_packets; i++) { | |
123 | ||
124 | /* check the availability of the frame buffer */ | |
125 | j = gspca_dev->fr_i; | |
126 | j = gspca_dev->fr_queue[j]; | |
127 | frame = &gspca_dev->frame[j]; | |
d43fa32f | 128 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
63eb9546 JFM |
129 | != V4L2_BUF_FLAG_QUEUED) { |
130 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
131 | break; | |
132 | } | |
133 | ||
134 | /* check the packet status and length */ | |
135 | len = urb->iso_frame_desc[i].actual_length; | |
6a7eba24 JFM |
136 | if (len == 0) |
137 | continue; | |
63eb9546 JFM |
138 | st = urb->iso_frame_desc[i].status; |
139 | if (st) { | |
6a7eba24 JFM |
140 | PDEBUG(D_ERR, |
141 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
142 | i, len, st); |
143 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
144 | continue; | |
145 | } | |
63eb9546 JFM |
146 | |
147 | /* let the packet be analyzed by the subdriver */ | |
148 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
149 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 150 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
151 | + urb->iso_frame_desc[i].offset; |
152 | pkt_scan(gspca_dev, frame, data, len); | |
153 | } | |
154 | ||
155 | /* resubmit the URB */ | |
d43fa32f | 156 | /*fixme: don't do that when userptr and too many URBs sent*/ |
63eb9546 JFM |
157 | urb->status = 0; |
158 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
159 | if (st < 0) | |
160 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
161 | } | |
162 | ||
d43fa32f JFM |
163 | /* |
164 | * ISOC message interrupt from the USB device | |
165 | * | |
166 | * Analyse each packet and call the subdriver for copy | |
167 | * to the frame buffer. | |
168 | * | |
169 | * There are 2 functions: | |
170 | * - the first one (isoc_irq_mmap) is used when the application | |
171 | * buffers are mapped. The frame detection and copy is done | |
172 | * at interrupt level. | |
173 | * - the second one (isoc_irq_user) is used when the application | |
174 | * buffers are in user space (userptr). The frame detection | |
175 | * and copy is done by the application. | |
176 | */ | |
6a7eba24 JFM |
177 | static void isoc_irq_mmap(struct urb *urb |
178 | ) | |
d43fa32f JFM |
179 | { |
180 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
181 | ||
182 | PDEBUG(D_PACK, "isoc irq mmap"); | |
183 | if (!gspca_dev->streaming) | |
184 | return; | |
185 | fill_frame(gspca_dev, urb); | |
186 | } | |
187 | ||
6a7eba24 JFM |
188 | static void isoc_irq_user(struct urb *urb |
189 | ) | |
d43fa32f JFM |
190 | { |
191 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
192 | int i; | |
193 | ||
194 | PDEBUG(D_PACK, "isoc irq user"); | |
195 | if (!gspca_dev->streaming) | |
196 | return; | |
197 | ||
198 | i = gspca_dev->urb_in % gspca_dev->nurbs; | |
199 | if (urb != gspca_dev->urb[i]) { | |
200 | PDEBUG(D_ERR|D_PACK, "urb out of sequence"); | |
201 | return; /* should never occur */ | |
202 | } | |
203 | ||
204 | gspca_dev->urb_in++; | |
205 | atomic_inc(&gspca_dev->nevent); /* new event */ | |
206 | wake_up_interruptible(&gspca_dev->wq); | |
207 | /*fixme: submit a new URBs until urb_in == urb_out (% nurbs)*/ | |
208 | } | |
209 | ||
210 | /* | |
211 | * treat the isoc messages | |
212 | * | |
213 | * This routine is called by the application (case userptr). | |
214 | */ | |
215 | static void isoc_transfer(struct gspca_dev *gspca_dev) | |
216 | { | |
217 | struct urb *urb; | |
218 | int i; | |
219 | ||
220 | for (;;) { | |
221 | i = gspca_dev->urb_out; | |
222 | PDEBUG(D_PACK, "isoc transf i:%d o:%d", gspca_dev->urb_in, i); | |
223 | if (i == gspca_dev->urb_in) /* isoc message to read */ | |
224 | break; /* no (more) message */ | |
225 | atomic_dec(&gspca_dev->nevent); | |
226 | /*PDEBUG(D_PACK, "isoc_trf nevent: %d", atomic_read(&gspca_dev->nevent));*/ | |
227 | gspca_dev->urb_out = i + 1; /* message treated */ | |
228 | urb = gspca_dev->urb[i % gspca_dev->nurbs]; | |
229 | fill_frame(gspca_dev, urb); | |
230 | } | |
231 | } | |
232 | ||
63eb9546 JFM |
233 | /* |
234 | * add data to the current frame | |
235 | * | |
d43fa32f JFM |
236 | * This function is called by the subdrivers at interrupt level |
237 | * or user level. | |
63eb9546 JFM |
238 | * To build a frame, these ones must add |
239 | * - one FIRST_PACKET | |
240 | * - 0 or many INTER_PACKETs | |
241 | * - one LAST_PACKET | |
242 | * DISCARD_PACKET invalidates the whole frame. | |
243 | * On LAST_PACKET, a new frame is returned. | |
244 | */ | |
245 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
246 | int packet_type, | |
247 | struct gspca_frame *frame, | |
a5ae2062 | 248 | const __u8 *data, |
63eb9546 JFM |
249 | int len) |
250 | { | |
251 | int i, j; | |
252 | ||
e2997a72 | 253 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
254 | |
255 | /* when start of a new frame, if the current frame buffer | |
256 | * is not queued, discard the whole frame */ | |
257 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
258 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
259 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
260 | gspca_dev->last_packet_type = DISCARD_PACKET; |
261 | return frame; | |
262 | } | |
263 | frame->data_end = frame->data; | |
264 | jiffies_to_timeval(get_jiffies_64(), | |
265 | &frame->v4l2_buf.timestamp); | |
266 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 267 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
63eb9546 | 268 | return frame; |
d43fa32f | 269 | } |
63eb9546 | 270 | |
d43fa32f | 271 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
272 | if (len > 0) { |
273 | if (frame->data_end - frame->data + len | |
274 | > frame->v4l2_buf.length) { | |
275 | PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d", | |
276 | frame->data_end - frame->data + len, | |
277 | frame->v4l2_buf.length); | |
278 | packet_type = DISCARD_PACKET; | |
279 | } else { | |
82643d0e | 280 | if (frame->v4l2_buf.memory != V4L2_MEMORY_USERPTR) { |
63eb9546 | 281 | memcpy(frame->data_end, data, len); |
82643d0e JFM |
282 | } else { |
283 | if (copy_to_user(frame->data_end, | |
284 | data, len) != 0) { | |
285 | PDEBUG(D_ERR|D_PACK, | |
286 | "copy to user failed"); | |
287 | packet_type = DISCARD_PACKET; | |
288 | } | |
289 | } | |
63eb9546 JFM |
290 | frame->data_end += len; |
291 | } | |
292 | } | |
293 | gspca_dev->last_packet_type = packet_type; | |
294 | ||
295 | /* if last packet, wake the application and advance in the queue */ | |
296 | if (packet_type == LAST_PACKET) { | |
297 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
298 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
299 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
300 | atomic_inc(&gspca_dev->nevent); | |
301 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
302 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
303 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
304 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
305 | frame->v4l2_buf.bytesused, | |
306 | gspca_dev->fr_q, | |
307 | i, | |
308 | gspca_dev->fr_o); | |
309 | j = gspca_dev->fr_queue[i]; | |
310 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
311 | } |
312 | return frame; | |
313 | } | |
314 | EXPORT_SYMBOL(gspca_frame_add); | |
315 | ||
316 | static int gspca_is_compressed(__u32 format) | |
317 | { | |
318 | switch (format) { | |
319 | case V4L2_PIX_FMT_MJPEG: | |
320 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 321 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 322 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
323 | return 1; |
324 | } | |
325 | return 0; | |
326 | } | |
327 | ||
328 | static void *rvmalloc(unsigned long size) | |
329 | { | |
330 | void *mem; | |
331 | unsigned long adr; | |
332 | ||
d43fa32f | 333 | /* size = PAGE_ALIGN(size); (already done) */ |
63eb9546 | 334 | mem = vmalloc_32(size); |
efab8211 | 335 | if (mem != NULL) { |
63eb9546 JFM |
336 | memset(mem, 0, size); |
337 | adr = (unsigned long) mem; | |
338 | while ((long) size > 0) { | |
339 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
340 | adr += PAGE_SIZE; | |
341 | size -= PAGE_SIZE; | |
342 | } | |
343 | } | |
344 | return mem; | |
345 | } | |
346 | ||
347 | static void rvfree(void *mem, unsigned long size) | |
348 | { | |
349 | unsigned long adr; | |
350 | ||
351 | if (!mem) | |
352 | return; | |
353 | adr = (unsigned long) mem; | |
354 | while ((long) size > 0) { | |
355 | ClearPageReserved(vmalloc_to_page((void *) adr)); | |
356 | adr += PAGE_SIZE; | |
357 | size -= PAGE_SIZE; | |
358 | } | |
359 | vfree(mem); | |
360 | } | |
361 | ||
362 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 363 | unsigned int count) |
63eb9546 | 364 | { |
d43fa32f JFM |
365 | struct gspca_frame *frame; |
366 | unsigned int frsz; | |
367 | int i; | |
63eb9546 | 368 | |
c2446b3e JFM |
369 | i = gspca_dev->curr_mode; |
370 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 371 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 JFM |
372 | frsz = PAGE_ALIGN(frsz); |
373 | PDEBUG(D_STREAM, "new fr_sz: %d", frsz); | |
374 | gspca_dev->frsz = frsz; | |
c2446b3e JFM |
375 | if (count > GSPCA_MAX_FRAMES) |
376 | count = GSPCA_MAX_FRAMES; | |
d43fa32f | 377 | if (gspca_dev->memory == V4L2_MEMORY_MMAP) { |
63eb9546 JFM |
378 | gspca_dev->frbuf = rvmalloc(frsz * count); |
379 | if (!gspca_dev->frbuf) { | |
380 | err("frame alloc failed"); | |
381 | return -ENOMEM; | |
382 | } | |
383 | } | |
384 | gspca_dev->nframes = count; | |
385 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
386 | frame = &gspca_dev->frame[i]; |
387 | frame->v4l2_buf.index = i; | |
388 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
389 | frame->v4l2_buf.flags = 0; | |
390 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
391 | frame->v4l2_buf.length = frsz; | |
392 | frame->v4l2_buf.memory = gspca_dev->memory; | |
393 | frame->v4l2_buf.sequence = 0; | |
394 | if (gspca_dev->memory == V4L2_MEMORY_MMAP) { | |
395 | frame->data = frame->data_end = | |
396 | gspca_dev->frbuf + i * frsz; | |
397 | frame->v4l2_buf.m.offset = i * frsz; | |
63eb9546 | 398 | } |
63eb9546 JFM |
399 | } |
400 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
401 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
402 | gspca_dev->sequence = 0; | |
403 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 404 | return 0; |
63eb9546 JFM |
405 | } |
406 | ||
407 | static void frame_free(struct gspca_dev *gspca_dev) | |
408 | { | |
409 | int i; | |
410 | ||
411 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 412 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
413 | rvfree(gspca_dev->frbuf, |
414 | gspca_dev->nframes * gspca_dev->frsz); | |
415 | gspca_dev->frbuf = NULL; | |
416 | for (i = 0; i < gspca_dev->nframes; i++) | |
417 | gspca_dev->frame[i].data = NULL; | |
418 | } | |
419 | gspca_dev->nframes = 0; | |
420 | } | |
421 | ||
d43fa32f | 422 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
423 | { |
424 | struct urb *urb; | |
425 | unsigned int i; | |
426 | ||
427 | PDEBUG(D_STREAM, "kill transfer"); | |
d43fa32f | 428 | for (i = 0; i < MAX_NURBS; ++i) { |
4aa0d037 | 429 | urb = gspca_dev->urb[i]; |
63eb9546 | 430 | if (urb == NULL) |
d43fa32f | 431 | break; |
63eb9546 | 432 | |
4aa0d037 | 433 | gspca_dev->urb[i] = NULL; |
63eb9546 | 434 | usb_kill_urb(urb); |
efab8211 | 435 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
436 | usb_buffer_free(gspca_dev->dev, |
437 | urb->transfer_buffer_length, | |
4aa0d037 | 438 | urb->transfer_buffer, |
63eb9546 | 439 | urb->transfer_dma); |
63eb9546 JFM |
440 | usb_free_urb(urb); |
441 | } | |
63eb9546 JFM |
442 | } |
443 | ||
444 | /* | |
445 | * search an input isochronous endpoint in an alternate setting | |
446 | */ | |
447 | static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt, | |
448 | __u8 epaddr) | |
449 | { | |
450 | struct usb_host_endpoint *ep; | |
451 | int i, attr; | |
452 | ||
453 | epaddr |= USB_DIR_IN; | |
454 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
455 | ep = &alt->endpoint[i]; | |
456 | if (ep->desc.bEndpointAddress == epaddr) { | |
457 | attr = ep->desc.bmAttributes | |
458 | & USB_ENDPOINT_XFERTYPE_MASK; | |
459 | if (attr == USB_ENDPOINT_XFER_ISOC) | |
460 | return ep; | |
461 | break; | |
462 | } | |
463 | } | |
464 | return NULL; | |
465 | } | |
466 | ||
467 | /* | |
468 | * search an input isochronous endpoint | |
469 | * | |
470 | * The endpoint is defined by the subdriver. | |
471 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
472 | * This routine may be called many times when the bandwidth is too small | |
473 | * (the bandwidth is checked on urb submit). | |
474 | */ | |
475 | struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev) | |
476 | { | |
477 | struct usb_interface *intf; | |
478 | struct usb_host_endpoint *ep; | |
479 | int i, ret; | |
480 | ||
481 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 482 | ep = NULL; |
63eb9546 JFM |
483 | i = gspca_dev->alt; /* previous alt setting */ |
484 | while (--i > 0) { /* alt 0 is unusable */ | |
485 | ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr); | |
486 | if (ep) | |
487 | break; | |
488 | } | |
6a7eba24 | 489 | if (ep == NULL) { |
63eb9546 JFM |
490 | err("no ISOC endpoint found"); |
491 | return NULL; | |
492 | } | |
493 | PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x", | |
494 | i, ep->desc.bEndpointAddress); | |
495 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
496 | if (ret < 0) { | |
497 | err("set interface err %d", ret); | |
498 | return NULL; | |
499 | } | |
d43fa32f | 500 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
501 | return ep; |
502 | } | |
503 | ||
504 | /* | |
505 | * create the isochronous URBs | |
506 | */ | |
507 | static int create_urbs(struct gspca_dev *gspca_dev, | |
508 | struct usb_host_endpoint *ep) | |
509 | { | |
510 | struct urb *urb; | |
d43fa32f JFM |
511 | int n, nurbs, i, psize, npkt, bsize; |
512 | usb_complete_t usb_complete; | |
63eb9546 JFM |
513 | |
514 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 515 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 516 | |
63eb9546 JFM |
517 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
518 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
519 | npkt = ISO_MAX_SIZE / psize; | |
520 | if (npkt > ISO_MAX_PKT) | |
521 | npkt = ISO_MAX_PKT; | |
522 | bsize = psize * npkt; | |
63eb9546 JFM |
523 | PDEBUG(D_STREAM, |
524 | "isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize); | |
d43fa32f | 525 | /*fixme:don't submit all URBs when userptr*/ |
82643d0e | 526 | if (gspca_dev->memory != V4L2_MEMORY_USERPTR) { |
d43fa32f | 527 | usb_complete = isoc_irq_mmap; |
6a7eba24 JFM |
528 | nurbs = DEF_NURBS; |
529 | } else { | |
d43fa32f | 530 | usb_complete = isoc_irq_user; |
6a7eba24 JFM |
531 | nurbs = USR_NURBS; |
532 | } | |
533 | gspca_dev->nurbs = nurbs; | |
d43fa32f | 534 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
535 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
536 | if (!urb) { | |
537 | err("usb_alloc_urb failed"); | |
538 | return -ENOMEM; | |
539 | } | |
4aa0d037 | 540 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
541 | bsize, |
542 | GFP_KERNEL, | |
543 | &urb->transfer_dma); | |
544 | ||
4aa0d037 | 545 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 546 | usb_free_urb(urb); |
d43fa32f | 547 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
548 | err("usb_buffer_urb failed"); |
549 | return -ENOMEM; | |
550 | } | |
4aa0d037 | 551 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
552 | urb->dev = gspca_dev->dev; |
553 | urb->context = gspca_dev; | |
554 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
555 | ep->desc.bEndpointAddress); | |
4aa0d037 JFM |
556 | urb->transfer_flags = URB_ISO_ASAP |
557 | | URB_NO_TRANSFER_DMA_MAP; | |
63eb9546 | 558 | urb->interval = ep->desc.bInterval; |
d43fa32f | 559 | urb->complete = usb_complete; |
63eb9546 JFM |
560 | urb->number_of_packets = npkt; |
561 | urb->transfer_buffer_length = bsize; | |
562 | for (i = 0; i < npkt; i++) { | |
563 | urb->iso_frame_desc[i].length = psize; | |
564 | urb->iso_frame_desc[i].offset = psize * i; | |
565 | } | |
566 | } | |
d43fa32f | 567 | gspca_dev->urb_in = gspca_dev->urb_out = 0; |
63eb9546 JFM |
568 | return 0; |
569 | } | |
570 | ||
571 | /* | |
572 | * start the USB transfer | |
573 | */ | |
574 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
575 | { | |
63eb9546 JFM |
576 | struct usb_host_endpoint *ep; |
577 | int n, ret; | |
578 | ||
e2997a72 HG |
579 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
580 | return -ERESTARTSYS; | |
63eb9546 | 581 | |
d43fa32f JFM |
582 | /* set the higher alternate setting and |
583 | * loop until urb submit succeeds */ | |
584 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 585 | for (;;) { |
d43fa32f | 586 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
63eb9546 JFM |
587 | ep = get_isoc_ep(gspca_dev); |
588 | if (ep == NULL) { | |
589 | ret = -EIO; | |
590 | goto out; | |
591 | } | |
592 | ret = create_urbs(gspca_dev, ep); | |
593 | if (ret < 0) | |
594 | goto out; | |
595 | ||
596 | /* start the cam */ | |
597 | gspca_dev->sd_desc->start(gspca_dev); | |
598 | gspca_dev->streaming = 1; | |
599 | atomic_set(&gspca_dev->nevent, 0); | |
600 | ||
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 | ||
e2997a72 | 632 | /* Note both the queue and the usb lock should be hold 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 JFM |
637 | if (gspca_dev->present) { |
638 | gspca_dev->sd_desc->stopN(gspca_dev); | |
d43fa32f | 639 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
640 | gspca_set_alt0(gspca_dev); |
641 | gspca_dev->sd_desc->stop0(gspca_dev); | |
642 | PDEBUG(D_STREAM, "stream off OK"); | |
643 | } else { | |
d43fa32f | 644 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
645 | atomic_inc(&gspca_dev->nevent); |
646 | wake_up_interruptible(&gspca_dev->wq); | |
647 | PDEBUG(D_ERR|D_STREAM, "stream off no device ??"); | |
648 | } | |
63eb9546 JFM |
649 | } |
650 | ||
d43fa32f | 651 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
652 | { |
653 | int i; | |
654 | ||
655 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
656 | gspca_dev->curr_mode = i; | |
657 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
658 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 659 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
660 | } |
661 | ||
662 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
663 | int width, int height) | |
664 | { | |
665 | int i; | |
666 | ||
d43fa32f JFM |
667 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
668 | if (width >= gspca_dev->cam.cam_mode[i].width | |
669 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
670 | break; |
671 | } | |
63eb9546 JFM |
672 | return i; |
673 | } | |
674 | ||
63eb9546 JFM |
675 | /* |
676 | * search a mode with the right pixel format | |
677 | */ | |
678 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
679 | int mode, | |
680 | int pixfmt) | |
681 | { | |
682 | int modeU, modeD; | |
683 | ||
684 | modeU = modeD = mode; | |
685 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
686 | if (--modeD >= 0) { | |
c2446b3e JFM |
687 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
688 | == pixfmt) | |
63eb9546 JFM |
689 | return modeD; |
690 | } | |
691 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
692 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
693 | == pixfmt) | |
63eb9546 JFM |
694 | return modeU; |
695 | } | |
696 | } | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
e078770a | 700 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
701 | struct v4l2_fmtdesc *fmtdesc) |
702 | { | |
703 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 704 | int i, j, index; |
63eb9546 JFM |
705 | __u32 fmt_tb[8]; |
706 | ||
63eb9546 JFM |
707 | /* give an index to each format */ |
708 | index = 0; | |
709 | j = 0; | |
710 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 711 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
712 | j = 0; |
713 | for (;;) { | |
714 | if (fmt_tb[j] == fmt_tb[index]) | |
715 | break; | |
716 | j++; | |
717 | } | |
718 | if (j == index) { | |
719 | if (fmtdesc->index == index) | |
720 | break; /* new format */ | |
721 | index++; | |
722 | if (index >= sizeof fmt_tb / sizeof fmt_tb[0]) | |
723 | return -EINVAL; | |
724 | } | |
725 | } | |
726 | if (i < 0) | |
727 | return -EINVAL; /* no more format */ | |
728 | ||
63eb9546 JFM |
729 | fmtdesc->pixelformat = fmt_tb[index]; |
730 | if (gspca_is_compressed(fmt_tb[index])) | |
731 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 732 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
733 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
734 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
735 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
736 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
737 | fmtdesc->description[4] = '\0'; | |
738 | return 0; | |
739 | } | |
740 | ||
e078770a | 741 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
742 | struct v4l2_format *fmt) |
743 | { | |
744 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 745 | int mode; |
63eb9546 | 746 | |
6a7eba24 JFM |
747 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
748 | return -EINVAL; | |
c2446b3e JFM |
749 | mode = gspca_dev->curr_mode; |
750 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
751 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
752 | return 0; |
753 | } | |
754 | ||
e078770a | 755 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
756 | struct v4l2_format *fmt) |
757 | { | |
24c530b4 | 758 | int w, h, mode, mode2; |
63eb9546 | 759 | |
6a7eba24 JFM |
760 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
761 | return -EINVAL; | |
4aa0d037 JFM |
762 | w = fmt->fmt.pix.width; |
763 | h = fmt->fmt.pix.height; | |
d43fa32f JFM |
764 | |
765 | /* (luvcview problem) */ | |
766 | if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG) | |
767 | fmt->fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG; | |
d646e701 | 768 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
769 | if (gspca_debug & D_CONF) |
770 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
771 | #endif | |
772 | /* search the closest mode for width and height */ | |
773 | mode = wxh_to_mode(gspca_dev, w, h); | |
774 | ||
775 | /* OK if right palette */ | |
c2446b3e JFM |
776 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
777 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
778 | |
779 | /* else, search the closest mode with the same pixel format */ | |
780 | mode2 = gspca_get_mode(gspca_dev, mode, | |
781 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 782 | if (mode2 >= 0) |
63eb9546 | 783 | mode = mode2; |
c2446b3e JFM |
784 | /* else |
785 | ; * no chance, return this mode */ | |
63eb9546 | 786 | } |
c2446b3e JFM |
787 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
788 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
789 | return mode; /* used when s_fmt */ |
790 | } | |
791 | ||
e078770a | 792 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
793 | void *priv, |
794 | struct v4l2_format *fmt) | |
795 | { | |
4aa0d037 | 796 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
797 | int ret; |
798 | ||
e078770a | 799 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
800 | if (ret < 0) |
801 | return ret; | |
802 | return 0; | |
803 | } | |
804 | ||
e078770a | 805 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
806 | struct v4l2_format *fmt) |
807 | { | |
808 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 809 | int ret; |
63eb9546 | 810 | |
e2997a72 HG |
811 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
812 | return -ERESTARTSYS; | |
d43fa32f | 813 | |
e078770a | 814 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
815 | if (ret < 0) |
816 | goto out; | |
817 | ||
d43fa32f JFM |
818 | if (gspca_dev->nframes != 0 |
819 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
820 | ret = -EINVAL; | |
821 | goto out; | |
822 | } | |
823 | ||
50a871fe JFM |
824 | if (ret == gspca_dev->curr_mode) { |
825 | ret = 0; | |
63eb9546 | 826 | goto out; /* same mode */ |
50a871fe | 827 | } |
d43fa32f JFM |
828 | |
829 | if (gspca_dev->streaming) { | |
830 | ret = -EBUSY; | |
831 | goto out; | |
e2997a72 | 832 | } |
4aa0d037 JFM |
833 | gspca_dev->width = fmt->fmt.pix.width; |
834 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
835 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
836 | gspca_dev->curr_mode = ret; | |
d43fa32f | 837 | |
d43fa32f | 838 | ret = 0; |
63eb9546 JFM |
839 | out: |
840 | mutex_unlock(&gspca_dev->queue_lock); | |
841 | return ret; | |
842 | } | |
843 | ||
844 | static int dev_open(struct inode *inode, struct file *file) | |
845 | { | |
846 | struct gspca_dev *gspca_dev; | |
847 | int ret; | |
848 | ||
d43fa32f | 849 | PDEBUG(D_STREAM, "%s open", current->comm); |
63eb9546 | 850 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
851 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
852 | return -ERESTARTSYS; | |
63eb9546 JFM |
853 | if (!gspca_dev->present) { |
854 | ret = -ENODEV; | |
855 | goto out; | |
856 | } | |
857 | ||
858 | /* if not done yet, initialize the sensor */ | |
859 | if (gspca_dev->users == 0) { | |
e2997a72 HG |
860 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
861 | ret = -ERESTARTSYS; | |
63eb9546 | 862 | goto out; |
e2997a72 | 863 | } |
63eb9546 JFM |
864 | ret = gspca_dev->sd_desc->open(gspca_dev); |
865 | mutex_unlock(&gspca_dev->usb_lock); | |
866 | if (ret != 0) { | |
867 | PDEBUG(D_ERR|D_CONF, "init device failed %d", ret); | |
868 | goto out; | |
869 | } | |
e2997a72 | 870 | } else if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
871 | ret = -EBUSY; |
872 | goto out; | |
873 | } | |
874 | gspca_dev->users++; | |
875 | file->private_data = gspca_dev; | |
d646e701 | 876 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 | 877 | /* activate the v4l2 debug */ |
d43fa32f | 878 | if (gspca_debug & D_V4L2) |
63eb9546 JFM |
879 | gspca_dev->vdev.debug |= 3; |
880 | else | |
881 | gspca_dev->vdev.debug &= ~3; | |
882 | #endif | |
883 | out: | |
884 | mutex_unlock(&gspca_dev->queue_lock); | |
885 | if (ret != 0) | |
886 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
887 | else | |
d43fa32f | 888 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
889 | return ret; |
890 | } | |
891 | ||
892 | static int dev_close(struct inode *inode, struct file *file) | |
893 | { | |
894 | struct gspca_dev *gspca_dev = file->private_data; | |
895 | ||
d43fa32f | 896 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
897 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
898 | return -ERESTARTSYS; | |
899 | gspca_dev->users--; | |
e2997a72 | 900 | |
4aa0d037 JFM |
901 | /* if the file did capture, free the streaming resources */ |
902 | if (gspca_dev->capt_file == file) { | |
903 | mutex_lock(&gspca_dev->usb_lock); | |
904 | if (gspca_dev->streaming) | |
905 | gspca_stream_off(gspca_dev); | |
906 | gspca_dev->sd_desc->close(gspca_dev); | |
907 | mutex_unlock(&gspca_dev->usb_lock); | |
908 | frame_free(gspca_dev); | |
efab8211 | 909 | gspca_dev->capt_file = NULL; |
d43fa32f | 910 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 911 | } |
d43fa32f | 912 | file->private_data = NULL; |
63eb9546 | 913 | mutex_unlock(&gspca_dev->queue_lock); |
d43fa32f | 914 | PDEBUG(D_STREAM, "close done"); |
63eb9546 JFM |
915 | return 0; |
916 | } | |
917 | ||
918 | static int vidioc_querycap(struct file *file, void *priv, | |
919 | struct v4l2_capability *cap) | |
920 | { | |
921 | struct gspca_dev *gspca_dev = priv; | |
922 | ||
63eb9546 JFM |
923 | memset(cap, 0, sizeof *cap); |
924 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
925 | strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card); | |
926 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, | |
927 | sizeof cap->bus_info); | |
928 | cap->version = DRIVER_VERSION_NUMBER; | |
929 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
930 | | V4L2_CAP_STREAMING | |
931 | | V4L2_CAP_READWRITE; | |
932 | return 0; | |
933 | } | |
934 | ||
6a7eba24 | 935 | /* the use of V4L2_CTRL_FLAG_NEXT_CTRL asks for the controls to be sorted */ |
63eb9546 JFM |
936 | static int vidioc_queryctrl(struct file *file, void *priv, |
937 | struct v4l2_queryctrl *q_ctrl) | |
938 | { | |
939 | struct gspca_dev *gspca_dev = priv; | |
940 | int i; | |
6a7eba24 JFM |
941 | u32 id; |
942 | ||
943 | id = q_ctrl->id; | |
944 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
945 | id &= V4L2_CTRL_ID_MASK; | |
946 | id++; | |
947 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
948 | if (id >= gspca_dev->sd_desc->ctrls[i].qctrl.id) { | |
949 | memcpy(q_ctrl, | |
950 | &gspca_dev->sd_desc->ctrls[i].qctrl, | |
951 | sizeof *q_ctrl); | |
952 | return 0; | |
953 | } | |
954 | } | |
955 | return -EINVAL; | |
956 | } | |
63eb9546 | 957 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 958 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
63eb9546 JFM |
959 | memcpy(q_ctrl, |
960 | &gspca_dev->sd_desc->ctrls[i].qctrl, | |
961 | sizeof *q_ctrl); | |
962 | return 0; | |
963 | } | |
964 | } | |
6a7eba24 JFM |
965 | if (id >= V4L2_CID_BASE |
966 | && id <= V4L2_CID_LASTP1) { | |
63eb9546 JFM |
967 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; |
968 | return 0; | |
969 | } | |
970 | return -EINVAL; | |
971 | } | |
972 | ||
973 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
974 | struct v4l2_control *ctrl) | |
975 | { | |
976 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 977 | const struct ctrl *ctrls; |
63eb9546 JFM |
978 | int i, ret; |
979 | ||
63eb9546 JFM |
980 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
981 | i < gspca_dev->sd_desc->nctrls; | |
982 | i++, ctrls++) { | |
983 | if (ctrl->id != ctrls->qctrl.id) | |
984 | continue; | |
985 | if (ctrl->value < ctrls->qctrl.minimum | |
986 | && ctrl->value > ctrls->qctrl.maximum) | |
987 | return -ERANGE; | |
988 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
989 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
990 | return -ERESTARTSYS; | |
63eb9546 JFM |
991 | ret = ctrls->set(gspca_dev, ctrl->value); |
992 | mutex_unlock(&gspca_dev->usb_lock); | |
993 | return ret; | |
994 | } | |
995 | return -EINVAL; | |
996 | } | |
997 | ||
998 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
999 | struct v4l2_control *ctrl) | |
1000 | { | |
1001 | struct gspca_dev *gspca_dev = priv; | |
1002 | ||
a5ae2062 | 1003 | const struct ctrl *ctrls; |
63eb9546 JFM |
1004 | int i, ret; |
1005 | ||
1006 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1007 | i < gspca_dev->sd_desc->nctrls; | |
1008 | i++, ctrls++) { | |
1009 | if (ctrl->id != ctrls->qctrl.id) | |
1010 | continue; | |
e2997a72 HG |
1011 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1012 | return -ERESTARTSYS; | |
63eb9546 JFM |
1013 | ret = ctrls->get(gspca_dev, &ctrl->value); |
1014 | mutex_unlock(&gspca_dev->usb_lock); | |
1015 | return ret; | |
1016 | } | |
1017 | return -EINVAL; | |
1018 | } | |
1019 | ||
1020 | static int vidioc_querymenu(struct file *file, void *priv, | |
1021 | struct v4l2_querymenu *qmenu) | |
1022 | { | |
1023 | struct gspca_dev *gspca_dev = priv; | |
1024 | ||
1025 | if (!gspca_dev->sd_desc->querymenu) | |
1026 | return -EINVAL; | |
1027 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1028 | } | |
1029 | ||
1030 | static int vidioc_enum_input(struct file *file, void *priv, | |
1031 | struct v4l2_input *input) | |
1032 | { | |
1033 | struct gspca_dev *gspca_dev = priv; | |
1034 | ||
1035 | if (input->index != 0) | |
1036 | return -EINVAL; | |
1037 | memset(input, 0, sizeof *input); | |
1038 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1039 | strncpy(input->name, gspca_dev->sd_desc->name, | |
1040 | sizeof input->name); | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1045 | { | |
1046 | *i = 0; | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1051 | { | |
1052 | if (i > 0) | |
1053 | return -EINVAL; | |
1054 | return (0); | |
1055 | } | |
1056 | ||
1057 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1058 | struct v4l2_requestbuffers *rb) | |
1059 | { | |
1060 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1061 | int i, ret = 0; |
63eb9546 | 1062 | |
63eb9546 JFM |
1063 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1064 | return -EINVAL; | |
d43fa32f JFM |
1065 | switch (rb->memory) { |
1066 | case V4L2_MEMORY_MMAP: | |
d43fa32f | 1067 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1068 | break; |
d43fa32f | 1069 | default: |
63eb9546 | 1070 | return -EINVAL; |
d43fa32f | 1071 | } |
e2997a72 HG |
1072 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1073 | return -ERESTARTSYS; | |
d43fa32f JFM |
1074 | |
1075 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1076 | if (gspca_dev->frame[i].vma_use_count) { | |
1077 | ret = -EBUSY; | |
1078 | goto out; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | /* only one file may do capture */ | |
efab8211 | 1083 | if ((gspca_dev->capt_file != NULL && gspca_dev->capt_file != file) |
d43fa32f | 1084 | || gspca_dev->streaming) { |
4aa0d037 JFM |
1085 | ret = -EBUSY; |
1086 | goto out; | |
1087 | } | |
d43fa32f JFM |
1088 | |
1089 | if (rb->count == 0) { /* unrequest? */ | |
1090 | frame_free(gspca_dev); | |
efab8211 | 1091 | gspca_dev->capt_file = NULL; |
d43fa32f JFM |
1092 | } else { |
1093 | gspca_dev->memory = rb->memory; | |
1094 | ret = frame_alloc(gspca_dev, rb->count); | |
1095 | if (ret == 0) { | |
1096 | rb->count = gspca_dev->nframes; | |
1097 | gspca_dev->capt_file = file; | |
1098 | } | |
4aa0d037 JFM |
1099 | } |
1100 | out: | |
63eb9546 JFM |
1101 | mutex_unlock(&gspca_dev->queue_lock); |
1102 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | static int vidioc_querybuf(struct file *file, void *priv, | |
1107 | struct v4l2_buffer *v4l2_buf) | |
1108 | { | |
1109 | struct gspca_dev *gspca_dev = priv; | |
1110 | struct gspca_frame *frame; | |
1111 | ||
63eb9546 JFM |
1112 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1113 | || v4l2_buf->index < 0 | |
1114 | || v4l2_buf->index >= gspca_dev->nframes) | |
1115 | return -EINVAL; | |
1116 | ||
1117 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1118 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static int vidioc_streamon(struct file *file, void *priv, | |
1123 | enum v4l2_buf_type buf_type) | |
1124 | { | |
1125 | struct gspca_dev *gspca_dev = priv; | |
1126 | int ret; | |
1127 | ||
63eb9546 JFM |
1128 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1129 | return -EINVAL; | |
e2997a72 HG |
1130 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1131 | return -ERESTARTSYS; | |
63eb9546 JFM |
1132 | if (!gspca_dev->present) { |
1133 | ret = -ENODEV; | |
1134 | goto out; | |
1135 | } | |
1136 | if (gspca_dev->nframes == 0) { | |
1137 | ret = -EINVAL; | |
1138 | goto out; | |
1139 | } | |
4aa0d037 JFM |
1140 | if (gspca_dev->capt_file != file) { |
1141 | ret = -EINVAL; | |
1142 | goto out; | |
1143 | } | |
63eb9546 JFM |
1144 | if (!gspca_dev->streaming) { |
1145 | ret = gspca_init_transfer(gspca_dev); | |
1146 | if (ret < 0) | |
1147 | goto out; | |
1148 | } | |
d646e701 | 1149 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
1150 | if (gspca_debug & D_STREAM) { |
1151 | PDEBUG_MODE("stream on OK", | |
1152 | gspca_dev->pixfmt, | |
1153 | gspca_dev->width, | |
1154 | gspca_dev->height); | |
1155 | } | |
1156 | #endif | |
e2997a72 | 1157 | ret = 0; |
63eb9546 JFM |
1158 | out: |
1159 | mutex_unlock(&gspca_dev->queue_lock); | |
1160 | return ret; | |
1161 | } | |
1162 | ||
1163 | static int vidioc_streamoff(struct file *file, void *priv, | |
1164 | enum v4l2_buf_type buf_type) | |
1165 | { | |
1166 | struct gspca_dev *gspca_dev = priv; | |
4aa0d037 | 1167 | int ret; |
63eb9546 | 1168 | |
63eb9546 JFM |
1169 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1170 | return -EINVAL; | |
4aa0d037 JFM |
1171 | if (!gspca_dev->streaming) |
1172 | return 0; | |
1173 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1174 | return -ERESTARTSYS; | |
1175 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { | |
1176 | ret = -ERESTARTSYS; | |
1177 | goto out; | |
63eb9546 | 1178 | } |
4aa0d037 JFM |
1179 | if (gspca_dev->capt_file != file) { |
1180 | ret = -EINVAL; | |
1181 | goto out2; | |
1182 | } | |
1183 | gspca_stream_off(gspca_dev); | |
1184 | ret = 0; | |
1185 | out2: | |
1186 | mutex_unlock(&gspca_dev->usb_lock); | |
1187 | out: | |
1188 | mutex_unlock(&gspca_dev->queue_lock); | |
1189 | return ret; | |
63eb9546 JFM |
1190 | } |
1191 | ||
1192 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1193 | struct v4l2_jpegcompression *jpegcomp) | |
1194 | { | |
1195 | struct gspca_dev *gspca_dev = priv; | |
1196 | int ret; | |
1197 | ||
1198 | if (!gspca_dev->sd_desc->get_jcomp) | |
1199 | return -EINVAL; | |
e2997a72 HG |
1200 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1201 | return -ERESTARTSYS; | |
63eb9546 JFM |
1202 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1203 | mutex_unlock(&gspca_dev->usb_lock); | |
1204 | return ret; | |
1205 | } | |
1206 | ||
1207 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1208 | struct v4l2_jpegcompression *jpegcomp) | |
1209 | { | |
1210 | struct gspca_dev *gspca_dev = priv; | |
1211 | int ret; | |
1212 | ||
e2997a72 HG |
1213 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1214 | return -ERESTARTSYS; | |
63eb9546 JFM |
1215 | if (!gspca_dev->sd_desc->set_jcomp) |
1216 | return -EINVAL; | |
1217 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1218 | mutex_unlock(&gspca_dev->usb_lock); | |
1219 | return ret; | |
1220 | } | |
1221 | ||
1222 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1223 | struct v4l2_streamparm *parm) | |
1224 | { | |
1225 | struct gspca_dev *gspca_dev = priv; | |
1226 | ||
6a7eba24 | 1227 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1228 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1229 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1234 | struct v4l2_streamparm *parm) | |
1235 | { | |
1236 | struct gspca_dev *gspca_dev = priv; | |
1237 | int n; | |
1238 | ||
63eb9546 JFM |
1239 | n = parm->parm.capture.readbuffers; |
1240 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1241 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1242 | else | |
1243 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1244 | return 0; |
1245 | } | |
1246 | ||
6a7eba24 JFM |
1247 | static int vidioc_s_std(struct file *filp, void *priv, |
1248 | v4l2_std_id *parm) | |
1249 | { | |
1250 | return 0; | |
1251 | } | |
1252 | ||
63eb9546 JFM |
1253 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1254 | static int vidiocgmbuf(struct file *file, void *priv, | |
1255 | struct video_mbuf *mbuf) | |
1256 | { | |
1257 | struct gspca_dev *gspca_dev = file->private_data; | |
1258 | int i; | |
1259 | ||
1260 | PDEBUG(D_STREAM, "cgmbuf"); | |
1261 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1262 | int ret; |
6a7eba24 JFM |
1263 | |
1264 | { | |
1265 | struct v4l2_format fmt; | |
1266 | ||
1267 | memset(&fmt, 0, sizeof fmt); | |
1268 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1269 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1270 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1271 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1272 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1273 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1274 | if (ret != 0) |
1275 | return ret; | |
1276 | } | |
1277 | { | |
1278 | struct v4l2_requestbuffers rb; | |
1279 | ||
1280 | memset(&rb, 0, sizeof rb); | |
1281 | rb.count = 4; | |
1282 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1283 | rb.memory = V4L2_MEMORY_MMAP; | |
1284 | ret = vidioc_reqbufs(file, priv, &rb); | |
1285 | if (ret != 0) | |
1286 | return ret; | |
1287 | } | |
63eb9546 JFM |
1288 | } |
1289 | mbuf->frames = gspca_dev->nframes; | |
1290 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1291 | for (i = 0; i < mbuf->frames; i++) | |
1292 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1293 | return 0; | |
1294 | } | |
1295 | #endif | |
1296 | ||
1297 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1298 | { | |
1299 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1300 | struct gspca_frame *frame; |
63eb9546 JFM |
1301 | struct page *page; |
1302 | unsigned long addr, start, size; | |
1303 | int i, ret; | |
1304 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1305 | int compat = 0; | |
1306 | #endif | |
1307 | ||
1308 | start = vma->vm_start; | |
1309 | size = vma->vm_end - vma->vm_start; | |
1310 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1311 | ||
e2997a72 HG |
1312 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1313 | return -ERESTARTSYS; | |
63eb9546 JFM |
1314 | if (!gspca_dev->present) { |
1315 | ret = -ENODEV; | |
4aa0d037 JFM |
1316 | goto out; |
1317 | } | |
1318 | if (gspca_dev->capt_file != file) { | |
1319 | ret = -EINVAL; | |
1320 | goto out; | |
63eb9546 JFM |
1321 | } |
1322 | ||
efab8211 | 1323 | frame = NULL; |
63eb9546 JFM |
1324 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1325 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1326 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1327 | break; | |
1328 | } | |
1329 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1330 | == vma->vm_pgoff) { | |
1331 | frame = &gspca_dev->frame[i]; | |
1332 | break; | |
1333 | } | |
1334 | } | |
efab8211 | 1335 | if (frame == NULL) { |
63eb9546 JFM |
1336 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1337 | ret = -EINVAL; | |
4aa0d037 | 1338 | goto out; |
63eb9546 JFM |
1339 | } |
1340 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1341 | if (i == 0 && size == frame->v4l2_buf.length * gspca_dev->nframes) | |
1342 | compat = 1; | |
1343 | else | |
1344 | #endif | |
1345 | if (size != frame->v4l2_buf.length) { | |
1346 | PDEBUG(D_STREAM, "mmap bad size"); | |
1347 | ret = -EINVAL; | |
4aa0d037 | 1348 | goto out; |
63eb9546 JFM |
1349 | } |
1350 | ||
1351 | /* | |
1352 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1353 | * device. It also prevents the region from being core dumped. | |
1354 | */ | |
1355 | vma->vm_flags |= VM_IO; | |
1356 | ||
1357 | addr = (unsigned long) frame->data; | |
1358 | while (size > 0) { | |
1359 | page = vmalloc_to_page((void *) addr); | |
1360 | ret = vm_insert_page(vma, start, page); | |
1361 | if (ret < 0) | |
4aa0d037 | 1362 | goto out; |
63eb9546 JFM |
1363 | start += PAGE_SIZE; |
1364 | addr += PAGE_SIZE; | |
1365 | size -= PAGE_SIZE; | |
1366 | } | |
1367 | ||
1368 | vma->vm_ops = &gspca_vm_ops; | |
1369 | vma->vm_private_data = frame; | |
1370 | gspca_vm_open(vma); | |
1371 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1372 | if (compat) { | |
1373 | /*fixme: ugly*/ | |
1374 | for (i = 1; i < gspca_dev->nframes; ++i) | |
1375 | gspca_dev->frame[i].v4l2_buf.flags |= | |
1376 | V4L2_BUF_FLAG_MAPPED; | |
1377 | } | |
1378 | #endif | |
e2997a72 | 1379 | ret = 0; |
4aa0d037 | 1380 | out: |
63eb9546 JFM |
1381 | mutex_unlock(&gspca_dev->queue_lock); |
1382 | return ret; | |
1383 | } | |
1384 | ||
63eb9546 JFM |
1385 | /* |
1386 | * wait for a video frame | |
1387 | * | |
1388 | * If a frame is ready, its index is returned. | |
1389 | */ | |
d43fa32f | 1390 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1391 | int nonblock_ing) |
1392 | { | |
1393 | struct gspca_frame *frame; | |
1394 | int i, j, ret; | |
1395 | ||
d43fa32f JFM |
1396 | /* if userptr, treat the awaiting URBs */ |
1397 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) | |
1398 | isoc_transfer(gspca_dev); | |
1399 | ||
1400 | /* check if a frame is ready */ | |
63eb9546 JFM |
1401 | i = gspca_dev->fr_o; |
1402 | j = gspca_dev->fr_queue[i]; | |
1403 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1404 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1405 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1406 | goto ok; |
82643d0e | 1407 | } |
63eb9546 JFM |
1408 | if (nonblock_ing) /* no frame yet */ |
1409 | return -EAGAIN; | |
1410 | ||
1411 | /* wait till a frame is ready */ | |
1412 | for (;;) { | |
4aa0d037 JFM |
1413 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1414 | atomic_read(&gspca_dev->nevent) > 0, | |
1415 | msecs_to_jiffies(3000)); | |
1416 | if (ret <= 0) { | |
1417 | if (ret < 0) | |
82643d0e JFM |
1418 | return ret; /* interrupt */ |
1419 | return -EIO; /* timeout */ | |
4aa0d037 | 1420 | } |
82643d0e | 1421 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1422 | if (!gspca_dev->streaming || !gspca_dev->present) |
1423 | return -EIO; | |
d43fa32f JFM |
1424 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) |
1425 | isoc_transfer(gspca_dev); | |
63eb9546 JFM |
1426 | i = gspca_dev->fr_o; |
1427 | j = gspca_dev->fr_queue[i]; | |
1428 | frame = &gspca_dev->frame[j]; | |
1429 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1430 | break; | |
1431 | } | |
63eb9546 | 1432 | ok: |
63eb9546 JFM |
1433 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1434 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1435 | gspca_dev->fr_q, | |
1436 | gspca_dev->fr_i, | |
1437 | gspca_dev->fr_o); | |
e2997a72 HG |
1438 | |
1439 | if (gspca_dev->sd_desc->dq_callback) | |
1440 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
1441 | ||
63eb9546 JFM |
1442 | return j; |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * dequeue a video buffer | |
1447 | * | |
1448 | * If nonblock_ing is false, block until a buffer is available. | |
1449 | */ | |
1450 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1451 | struct v4l2_buffer *v4l2_buf) | |
1452 | { | |
1453 | struct gspca_dev *gspca_dev = priv; | |
1454 | struct gspca_frame *frame; | |
1455 | int i, ret; | |
1456 | ||
1457 | PDEBUG(D_FRAM, "dqbuf"); | |
1458 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE | |
1459 | || (v4l2_buf->memory != V4L2_MEMORY_MMAP | |
1460 | && v4l2_buf->memory != V4L2_MEMORY_USERPTR)) | |
1461 | return -EINVAL; | |
1462 | if (!gspca_dev->streaming) | |
1463 | return -EINVAL; | |
4aa0d037 JFM |
1464 | if (gspca_dev->capt_file != file) { |
1465 | ret = -EINVAL; | |
1466 | goto out; | |
1467 | } | |
63eb9546 JFM |
1468 | |
1469 | /* only one read */ | |
1470 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) | |
1471 | return -ERESTARTSYS; | |
1472 | ||
d43fa32f | 1473 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1474 | if (ret < 0) |
4aa0d037 | 1475 | goto out; |
63eb9546 JFM |
1476 | i = ret; /* frame index */ |
1477 | frame = &gspca_dev->frame[i]; | |
1478 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; | |
1479 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1480 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1481 | ret = 0; | |
4aa0d037 | 1482 | out: |
63eb9546 JFM |
1483 | mutex_unlock(&gspca_dev->read_lock); |
1484 | return ret; | |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * queue a video buffer | |
1489 | * | |
1490 | * Attempting to queue a buffer that has already been | |
1491 | * queued will return -EINVAL. | |
1492 | */ | |
1493 | static int vidioc_qbuf(struct file *file, void *priv, | |
1494 | struct v4l2_buffer *v4l2_buf) | |
1495 | { | |
1496 | struct gspca_dev *gspca_dev = priv; | |
1497 | struct gspca_frame *frame; | |
1498 | int i, index, ret; | |
1499 | ||
1500 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1501 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1502 | return -EINVAL; | |
1503 | ||
1504 | index = v4l2_buf->index; | |
1505 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1506 | PDEBUG(D_FRAM, |
63eb9546 JFM |
1507 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
1508 | return -EINVAL; | |
1509 | } | |
1510 | frame = &gspca_dev->frame[index]; | |
1511 | ||
1512 | if (v4l2_buf->memory != frame->v4l2_buf.memory) { | |
d43fa32f | 1513 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
63eb9546 JFM |
1514 | return -EINVAL; |
1515 | } | |
4aa0d037 JFM |
1516 | if (gspca_dev->capt_file != file) |
1517 | return -EINVAL; | |
63eb9546 | 1518 | |
e2997a72 HG |
1519 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1520 | return -ERESTARTSYS; | |
1521 | ||
d43fa32f JFM |
1522 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1523 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1524 | ret = -EINVAL; |
1525 | goto out; | |
1526 | } | |
1527 | ||
1528 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
d43fa32f | 1529 | /* frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; */ |
63eb9546 | 1530 | |
d43fa32f | 1531 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 | 1532 | frame->data = frame->data_end = |
6a7eba24 | 1533 | (__u8 *) v4l2_buf->m.userptr; |
63eb9546 JFM |
1534 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1535 | frame->v4l2_buf.length = v4l2_buf->length; | |
1536 | } | |
1537 | ||
1538 | /* put the buffer in the 'queued' queue */ | |
1539 | i = gspca_dev->fr_q; | |
1540 | gspca_dev->fr_queue[i] = index; | |
1541 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1542 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1543 | gspca_dev->fr_q, | |
1544 | gspca_dev->fr_i, | |
1545 | gspca_dev->fr_o); | |
1546 | ||
1547 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1548 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1549 | ret = 0; | |
1550 | out: | |
1551 | mutex_unlock(&gspca_dev->queue_lock); | |
1552 | return ret; | |
1553 | } | |
1554 | ||
d43fa32f JFM |
1555 | /* |
1556 | * allocate the resources for read() | |
1557 | */ | |
1558 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1559 | struct file *file) | |
63eb9546 | 1560 | { |
63eb9546 | 1561 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1562 | int i, ret; |
63eb9546 | 1563 | |
d43fa32f | 1564 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1565 | if (gspca_dev->nframes == 0) { |
1566 | struct v4l2_requestbuffers rb; | |
1567 | ||
1568 | memset(&rb, 0, sizeof rb); | |
1569 | rb.count = gspca_dev->nbufread; | |
1570 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1571 | rb.memory = V4L2_MEMORY_MMAP; | |
1572 | ret = vidioc_reqbufs(file, gspca_dev, &rb); | |
1573 | if (ret != 0) { | |
d43fa32f | 1574 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1575 | return ret; |
1576 | } | |
1577 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1578 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1579 | v4l2_buf.memory = V4L2_MEMORY_MMAP; | |
1580 | for (i = 0; i < gspca_dev->nbufread; i++) { | |
1581 | v4l2_buf.index = i; | |
1582 | /*fixme: ugly!*/ | |
1583 | gspca_dev->frame[i].v4l2_buf.flags |= | |
1584 | V4L2_BUF_FLAG_MAPPED; | |
1585 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1586 | if (ret != 0) { | |
1587 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1588 | return ret; | |
1589 | } | |
1590 | } | |
d43fa32f JFM |
1591 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1592 | } | |
4aa0d037 | 1593 | |
d43fa32f JFM |
1594 | /* start streaming */ |
1595 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1596 | if (ret != 0) | |
1597 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1602 | { | |
1603 | struct gspca_dev *gspca_dev = file->private_data; | |
1604 | int i, ret; | |
1605 | ||
1606 | PDEBUG(D_FRAM, "poll"); | |
1607 | ||
1608 | poll_wait(file, &gspca_dev->wq, wait); | |
1609 | if (!gspca_dev->present) | |
1610 | return POLLERR; | |
1611 | ||
1612 | /* if not streaming, the user would use read() */ | |
63eb9546 | 1613 | if (!gspca_dev->streaming) { |
d43fa32f JFM |
1614 | if (gspca_dev->memory != GSPCA_MEMORY_NO) { |
1615 | ret = POLLERR; /* not the 1st time */ | |
1616 | goto out; | |
1617 | } | |
1618 | ret = read_alloc(gspca_dev, file); | |
63eb9546 | 1619 | if (ret != 0) { |
d43fa32f JFM |
1620 | ret = POLLERR; |
1621 | goto out; | |
63eb9546 JFM |
1622 | } |
1623 | } | |
1624 | ||
d43fa32f JFM |
1625 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1626 | return POLLERR; | |
1627 | if (!gspca_dev->present) { | |
1628 | ret = POLLERR; | |
1629 | goto out; | |
1630 | } | |
1631 | ||
82643d0e | 1632 | /* if userptr, treat the awaiting URBs */ |
d43fa32f JFM |
1633 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR |
1634 | && gspca_dev->capt_file == file) | |
1635 | isoc_transfer(gspca_dev); | |
1636 | ||
1637 | i = gspca_dev->fr_o; | |
1638 | i = gspca_dev->fr_queue[i]; | |
1639 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1640 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1641 | else | |
1642 | ret = 0; | |
1643 | out: | |
1644 | mutex_unlock(&gspca_dev->queue_lock); | |
1645 | return ret; | |
1646 | } | |
1647 | ||
1648 | static ssize_t dev_read(struct file *file, char __user *data, | |
1649 | size_t count, loff_t *ppos) | |
1650 | { | |
1651 | struct gspca_dev *gspca_dev = file->private_data; | |
1652 | struct gspca_frame *frame; | |
1653 | struct v4l2_buffer v4l2_buf; | |
1654 | struct timeval timestamp; | |
82643d0e | 1655 | int n, ret, ret2; |
d43fa32f JFM |
1656 | |
1657 | PDEBUG(D_FRAM, "read (%d)", count); | |
1658 | if (!gspca_dev->present) | |
1659 | return -ENODEV; | |
1660 | switch (gspca_dev->memory) { | |
1661 | case GSPCA_MEMORY_NO: /* first time */ | |
1662 | ret = read_alloc(gspca_dev, file); | |
1663 | if (ret != 0) | |
1664 | return ret; | |
1665 | break; | |
1666 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1667 | if (gspca_dev->capt_file == file) |
1668 | break; | |
1669 | /* fall thru */ | |
d43fa32f JFM |
1670 | default: |
1671 | return -EINVAL; | |
1672 | } | |
1673 | ||
63eb9546 JFM |
1674 | /* get a frame */ |
1675 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1676 | timestamp.tv_sec--; | |
82643d0e JFM |
1677 | n = 2; |
1678 | for (;;) { | |
63eb9546 JFM |
1679 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1680 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1681 | v4l2_buf.memory = V4L2_MEMORY_MMAP; | |
1682 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); | |
1683 | if (ret != 0) { | |
1684 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1685 | return ret; | |
1686 | } | |
1687 | ||
1688 | /* if the process slept for more than 1 second, | |
82643d0e | 1689 | * get anewer frame */ |
63eb9546 | 1690 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1691 | if (--n < 0) |
1692 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1693 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1694 | break; | |
1695 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1696 | if (ret != 0) { | |
1697 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1698 | return ret; | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | /* copy the frame */ | |
1703 | if (count < frame->v4l2_buf.bytesused) { | |
1704 | PDEBUG(D_STREAM, "read bad count: %d < %d", | |
1705 | count, frame->v4l2_buf.bytesused); | |
1706 | /*fixme: special errno?*/ | |
1707 | ret = -EINVAL; | |
1708 | goto out; | |
1709 | } | |
1710 | count = frame->v4l2_buf.bytesused; | |
1711 | ret = copy_to_user(data, frame->data, count); | |
1712 | if (ret != 0) { | |
1713 | PDEBUG(D_ERR|D_STREAM, | |
1714 | "read cp to user lack %d / %d", ret, count); | |
1715 | ret = -EFAULT; | |
1716 | goto out; | |
1717 | } | |
1718 | ret = count; | |
1719 | out: | |
1720 | /* in each case, requeue the buffer */ | |
1721 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1722 | if (ret2 != 0) | |
1723 | return ret2; | |
1724 | return ret; | |
1725 | } | |
1726 | ||
d43fa32f | 1727 | static void dev_release(struct video_device *vfd) |
63eb9546 JFM |
1728 | { |
1729 | /* nothing */ | |
1730 | } | |
1731 | ||
1732 | static struct file_operations dev_fops = { | |
1733 | .owner = THIS_MODULE, | |
1734 | .open = dev_open, | |
1735 | .release = dev_close, | |
1736 | .read = dev_read, | |
1737 | .mmap = dev_mmap, | |
1738 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1739 | #ifdef CONFIG_COMPAT |
1740 | .compat_ioctl = v4l_compat_ioctl32, | |
1741 | #endif | |
63eb9546 JFM |
1742 | .llseek = no_llseek, |
1743 | .poll = dev_poll, | |
1744 | }; | |
1745 | ||
1746 | static struct video_device gspca_template = { | |
1747 | .name = "gspca main driver", | |
1748 | .type = VID_TYPE_CAPTURE, | |
1749 | .fops = &dev_fops, | |
d43fa32f | 1750 | .release = dev_release, /* mandatory */ |
63eb9546 JFM |
1751 | .minor = -1, |
1752 | .vidioc_querycap = vidioc_querycap, | |
1753 | .vidioc_dqbuf = vidioc_dqbuf, | |
1754 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1755 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1756 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1757 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1758 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1759 | .vidioc_streamon = vidioc_streamon, |
1760 | .vidioc_queryctrl = vidioc_queryctrl, | |
1761 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1762 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1763 | .vidioc_querymenu = vidioc_querymenu, | |
1764 | .vidioc_enum_input = vidioc_enum_input, | |
1765 | .vidioc_g_input = vidioc_g_input, | |
1766 | .vidioc_s_input = vidioc_s_input, | |
1767 | .vidioc_reqbufs = vidioc_reqbufs, | |
1768 | .vidioc_querybuf = vidioc_querybuf, | |
1769 | .vidioc_streamoff = vidioc_streamoff, | |
1770 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1771 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1772 | .vidioc_g_parm = vidioc_g_parm, | |
1773 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1774 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1775 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1776 | .vidiocgmbuf = vidiocgmbuf, | |
1777 | #endif | |
1778 | }; | |
1779 | ||
1780 | /* | |
1781 | * probe and create a new gspca device | |
1782 | * | |
1783 | * This function must be called by the sub-driver when it is | |
1784 | * called for probing a new device. | |
1785 | */ | |
1786 | int gspca_dev_probe(struct usb_interface *intf, | |
1787 | const struct usb_device_id *id, | |
1788 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1789 | int dev_size, |
1790 | struct module *module) | |
63eb9546 JFM |
1791 | { |
1792 | struct usb_interface_descriptor *interface; | |
1793 | struct gspca_dev *gspca_dev; | |
1794 | struct usb_device *dev = interface_to_usbdev(intf); | |
1795 | int ret; | |
63eb9546 | 1796 | |
6a7eba24 | 1797 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1798 | |
1799 | /* we don't handle multi-config cameras */ | |
1800 | if (dev->descriptor.bNumConfigurations != 1) | |
1801 | return -ENODEV; | |
1802 | interface = &intf->cur_altsetting->desc; | |
1803 | if (interface->bInterfaceNumber > 0) | |
1804 | return -ENODEV; | |
1805 | ||
1806 | /* create the device */ | |
1807 | if (dev_size < sizeof *gspca_dev) | |
1808 | dev_size = sizeof *gspca_dev; | |
1809 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
1810 | if (gspca_dev == NULL) { | |
1811 | err("couldn't kzalloc gspca struct"); | |
1812 | return -EIO; | |
1813 | } | |
1814 | gspca_dev->dev = dev; | |
1815 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1816 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 JFM |
1817 | gspca_dev->sd_desc = sd_desc; |
1818 | /* gspca_dev->users = 0; (done by kzalloc) */ | |
1819 | gspca_dev->nbufread = 2; | |
1820 | ||
1821 | /* configure the subdriver */ | |
1822 | ret = gspca_dev->sd_desc->config(gspca_dev, id); | |
1823 | if (ret < 0) | |
1824 | goto out; | |
1825 | ret = gspca_set_alt0(gspca_dev); | |
1826 | if (ret < 0) | |
1827 | goto out; | |
1828 | gspca_set_default_mode(gspca_dev); | |
1829 | ||
1830 | mutex_init(&gspca_dev->usb_lock); | |
1831 | mutex_init(&gspca_dev->read_lock); | |
1832 | mutex_init(&gspca_dev->queue_lock); | |
1833 | init_waitqueue_head(&gspca_dev->wq); | |
1834 | ||
1835 | /* init video stuff */ | |
1836 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
1837 | gspca_dev->vdev.dev = &dev->dev; | |
d43fa32f JFM |
1838 | memcpy(&gspca_dev->fops, &dev_fops, sizeof gspca_dev->fops); |
1839 | gspca_dev->vdev.fops = &gspca_dev->fops; | |
1840 | gspca_dev->fops.owner = module; /* module protection */ | |
63eb9546 JFM |
1841 | ret = video_register_device(&gspca_dev->vdev, |
1842 | VFL_TYPE_GRABBER, | |
1843 | video_nr); | |
1844 | if (ret < 0) { | |
1845 | err("video_register_device err %d", ret); | |
1846 | goto out; | |
1847 | } | |
1848 | ||
1849 | gspca_dev->present = 1; | |
1850 | usb_set_intfdata(intf, gspca_dev); | |
1851 | PDEBUG(D_PROBE, "probe ok"); | |
1852 | return 0; | |
1853 | out: | |
1854 | kfree(gspca_dev); | |
1855 | return ret; | |
1856 | } | |
1857 | EXPORT_SYMBOL(gspca_dev_probe); | |
1858 | ||
1859 | /* | |
1860 | * USB disconnection | |
1861 | * | |
1862 | * This function must be called by the sub-driver | |
1863 | * when the device disconnects, after the specific resources are freed. | |
1864 | */ | |
1865 | void gspca_disconnect(struct usb_interface *intf) | |
1866 | { | |
4aa0d037 | 1867 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 JFM |
1868 | |
1869 | if (!gspca_dev) | |
1870 | return; | |
1871 | gspca_dev->present = 0; | |
e2997a72 HG |
1872 | mutex_lock(&gspca_dev->queue_lock); |
1873 | mutex_lock(&gspca_dev->usb_lock); | |
1874 | gspca_dev->streaming = 0; | |
d43fa32f | 1875 | destroy_urbs(gspca_dev); |
63eb9546 | 1876 | mutex_unlock(&gspca_dev->usb_lock); |
e2997a72 | 1877 | mutex_unlock(&gspca_dev->queue_lock); |
63eb9546 JFM |
1878 | while (gspca_dev->users != 0) { /* wait until fully closed */ |
1879 | atomic_inc(&gspca_dev->nevent); | |
1880 | wake_up_interruptible(&gspca_dev->wq); /* wake processes */ | |
1881 | schedule(); | |
1882 | } | |
1883 | /* We don't want people trying to open up the device */ | |
1884 | video_unregister_device(&gspca_dev->vdev); | |
1885 | /* Free the memory */ | |
1886 | kfree(gspca_dev); | |
1887 | PDEBUG(D_PROBE, "disconnect complete"); | |
1888 | } | |
1889 | EXPORT_SYMBOL(gspca_disconnect); | |
1890 | ||
1891 | /* -- module insert / remove -- */ | |
1892 | static int __init gspca_init(void) | |
1893 | { | |
1894 | info("main v%s registered", version); | |
1895 | return 0; | |
1896 | } | |
1897 | static void __exit gspca_exit(void) | |
1898 | { | |
1899 | info("main deregistered"); | |
1900 | } | |
1901 | ||
1902 | module_init(gspca_init); | |
1903 | module_exit(gspca_exit); | |
1904 | ||
d646e701 | 1905 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
1906 | module_param_named(debug, gspca_debug, int, 0644); |
1907 | MODULE_PARM_DESC(debug, | |
1908 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
1909 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
1910 | " 0x0100: v4l2"); | |
6a7eba24 | 1911 | #endif |