Commit | Line | Data |
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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 | ||
77ee3318 | 50 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 8, 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 | ||
77ee3318 | 77 | /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
d43fa32f JFM |
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; | |
1b60e1ad | 111 | |
db870875 | 112 | frame = gspca_dev->cur_frame; |
1b60e1ad JFM |
113 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
114 | != V4L2_BUF_FLAG_QUEUED) | |
115 | return NULL; | |
116 | return frame; | |
117 | } | |
118 | EXPORT_SYMBOL(gspca_get_i_frame); | |
119 | ||
63eb9546 | 120 | /* |
d43fa32f | 121 | * fill a video frame from an URB and resubmit |
63eb9546 | 122 | */ |
d43fa32f JFM |
123 | static void fill_frame(struct gspca_dev *gspca_dev, |
124 | struct urb *urb) | |
63eb9546 | 125 | { |
8d584a53 | 126 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 127 | int i, len, st; |
63eb9546 JFM |
128 | cam_pkt_op pkt_scan; |
129 | ||
6a7eba24 | 130 | if (urb->status != 0) { |
090264e5 JFM |
131 | if (urb->status == -ESHUTDOWN) |
132 | return; /* disconnection */ | |
62ee8eee | 133 | #ifdef CONFIG_PM |
6a540bdf HG |
134 | if (gspca_dev->frozen) |
135 | return; | |
62ee8eee | 136 | #endif |
6a540bdf | 137 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 138 | urb->status = 0; |
bf926adf | 139 | goto resubmit; |
6a7eba24 | 140 | } |
63eb9546 JFM |
141 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
142 | for (i = 0; i < urb->number_of_packets; i++) { | |
143 | ||
63eb9546 JFM |
144 | /* check the packet status and length */ |
145 | len = urb->iso_frame_desc[i].actual_length; | |
ff374747 JFM |
146 | if (len == 0) { |
147 | if (gspca_dev->empty_packet == 0) | |
148 | gspca_dev->empty_packet = 1; | |
6a7eba24 | 149 | continue; |
ff374747 | 150 | } |
63eb9546 JFM |
151 | st = urb->iso_frame_desc[i].status; |
152 | if (st) { | |
6a7eba24 JFM |
153 | PDEBUG(D_ERR, |
154 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
155 | i, len, st); |
156 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
157 | continue; | |
158 | } | |
63eb9546 JFM |
159 | |
160 | /* let the packet be analyzed by the subdriver */ | |
161 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
162 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 163 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 164 | + urb->iso_frame_desc[i].offset; |
76dd272b | 165 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
166 | } |
167 | ||
bf926adf | 168 | resubmit: |
63eb9546 | 169 | /* resubmit the URB */ |
63eb9546 JFM |
170 | st = usb_submit_urb(urb, GFP_ATOMIC); |
171 | if (st < 0) | |
172 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
173 | } | |
174 | ||
d43fa32f JFM |
175 | /* |
176 | * ISOC message interrupt from the USB device | |
177 | * | |
ac0d6df6 | 178 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 179 | */ |
8d584a53 | 180 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
181 | { |
182 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
183 | ||
3647fea8 | 184 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
185 | if (!gspca_dev->streaming) |
186 | return; | |
187 | fill_frame(gspca_dev, urb); | |
188 | } | |
189 | ||
0be01004 JFM |
190 | /* |
191 | * bulk message interrupt from the USB device | |
192 | */ | |
8d584a53 | 193 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
194 | { |
195 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 196 | int st; |
0be01004 JFM |
197 | |
198 | PDEBUG(D_PACK, "bulk irq"); | |
199 | if (!gspca_dev->streaming) | |
200 | return; | |
880ae24d JFM |
201 | switch (urb->status) { |
202 | case 0: | |
203 | break; | |
090264e5 JFM |
204 | case -ESHUTDOWN: |
205 | return; /* disconnection */ | |
880ae24d | 206 | default: |
0be01004 | 207 | #ifdef CONFIG_PM |
6a540bdf HG |
208 | if (gspca_dev->frozen) |
209 | return; | |
0be01004 | 210 | #endif |
6a540bdf | 211 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 212 | urb->status = 0; |
bf926adf | 213 | goto resubmit; |
0be01004 JFM |
214 | } |
215 | ||
d131c3c9 JFM |
216 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
217 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
218 | urb->transfer_buffer, |
219 | urb->actual_length); | |
dff369aa | 220 | |
bf926adf | 221 | resubmit: |
dff369aa AO |
222 | /* resubmit the URB */ |
223 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
224 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
225 | if (st < 0) | |
226 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
227 | } | |
0be01004 JFM |
228 | } |
229 | ||
63eb9546 JFM |
230 | /* |
231 | * add data to the current frame | |
232 | * | |
ac0d6df6 JFM |
233 | * This function is called by the subdrivers at interrupt level. |
234 | * | |
63eb9546 JFM |
235 | * To build a frame, these ones must add |
236 | * - one FIRST_PACKET | |
237 | * - 0 or many INTER_PACKETs | |
238 | * - one LAST_PACKET | |
239 | * DISCARD_PACKET invalidates the whole frame. | |
240 | * On LAST_PACKET, a new frame is returned. | |
241 | */ | |
76dd272b JFM |
242 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
243 | enum gspca_packet_type packet_type, | |
244 | const u8 *data, | |
245 | int len) | |
63eb9546 | 246 | { |
3ec342f2 | 247 | struct gspca_frame *frame; |
63eb9546 JFM |
248 | int i, j; |
249 | ||
e2997a72 | 250 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 JFM |
251 | |
252 | /* check the availability of the frame buffer */ | |
3ec342f2 | 253 | frame = gspca_dev->cur_frame; |
d131c3c9 JFM |
254 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
255 | != V4L2_BUF_FLAG_QUEUED) { | |
256 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
76dd272b | 257 | return; |
d131c3c9 | 258 | } |
63eb9546 JFM |
259 | |
260 | /* when start of a new frame, if the current frame buffer | |
261 | * is not queued, discard the whole frame */ | |
262 | if (packet_type == FIRST_PACKET) { | |
63eb9546 JFM |
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) { |
06ca78fa JFM |
268 | if (packet_type == LAST_PACKET) |
269 | gspca_dev->last_packet_type = packet_type; | |
76dd272b | 270 | return; |
d43fa32f | 271 | } |
63eb9546 | 272 | |
d43fa32f | 273 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
274 | if (len > 0) { |
275 | if (frame->data_end - frame->data + len | |
276 | > frame->v4l2_buf.length) { | |
a9e11134 | 277 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
278 | frame->data_end - frame->data + len, |
279 | frame->v4l2_buf.length); | |
280 | packet_type = DISCARD_PACKET; | |
281 | } else { | |
ac0d6df6 | 282 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
283 | frame->data_end += len; |
284 | } | |
285 | } | |
286 | gspca_dev->last_packet_type = packet_type; | |
287 | ||
219423c1 | 288 | /* if last packet, wake up the application and advance in the queue */ |
63eb9546 JFM |
289 | if (packet_type == LAST_PACKET) { |
290 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
291 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
292 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
63eb9546 | 293 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
d43fa32f JFM |
294 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
295 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
296 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
297 | frame->v4l2_buf.bytesused, | |
298 | gspca_dev->fr_q, | |
299 | i, | |
300 | gspca_dev->fr_o); | |
301 | j = gspca_dev->fr_queue[i]; | |
76dd272b | 302 | gspca_dev->cur_frame = &gspca_dev->frame[j]; |
63eb9546 | 303 | } |
63eb9546 JFM |
304 | } |
305 | EXPORT_SYMBOL(gspca_frame_add); | |
306 | ||
307 | static int gspca_is_compressed(__u32 format) | |
308 | { | |
309 | switch (format) { | |
310 | case V4L2_PIX_FMT_MJPEG: | |
311 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 312 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 313 | case V4L2_PIX_FMT_PAC207: |
d661e622 | 314 | case V4L2_PIX_FMT_MR97310A: |
63eb9546 JFM |
315 | return 1; |
316 | } | |
317 | return 0; | |
318 | } | |
319 | ||
d50e257e | 320 | static void *rvmalloc(long size) |
63eb9546 JFM |
321 | { |
322 | void *mem; | |
323 | unsigned long adr; | |
324 | ||
63eb9546 | 325 | mem = vmalloc_32(size); |
efab8211 | 326 | if (mem != NULL) { |
63eb9546 | 327 | adr = (unsigned long) mem; |
d50e257e | 328 | while (size > 0) { |
63eb9546 JFM |
329 | SetPageReserved(vmalloc_to_page((void *) adr)); |
330 | adr += PAGE_SIZE; | |
331 | size -= PAGE_SIZE; | |
332 | } | |
333 | } | |
334 | return mem; | |
335 | } | |
336 | ||
ac0d6df6 | 337 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
338 | { |
339 | unsigned long adr; | |
340 | ||
63eb9546 | 341 | adr = (unsigned long) mem; |
ac0d6df6 | 342 | while (size > 0) { |
63eb9546 JFM |
343 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
344 | adr += PAGE_SIZE; | |
345 | size -= PAGE_SIZE; | |
346 | } | |
347 | vfree(mem); | |
348 | } | |
349 | ||
350 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 351 | unsigned int count) |
63eb9546 | 352 | { |
d43fa32f JFM |
353 | struct gspca_frame *frame; |
354 | unsigned int frsz; | |
355 | int i; | |
63eb9546 | 356 | |
c2446b3e JFM |
357 | i = gspca_dev->curr_mode; |
358 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 359 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 360 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 361 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
362 | if (count > GSPCA_MAX_FRAMES) |
363 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
364 | gspca_dev->frbuf = rvmalloc(frsz * count); |
365 | if (!gspca_dev->frbuf) { | |
366 | err("frame alloc failed"); | |
367 | return -ENOMEM; | |
63eb9546 JFM |
368 | } |
369 | gspca_dev->nframes = count; | |
370 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
371 | frame = &gspca_dev->frame[i]; |
372 | frame->v4l2_buf.index = i; | |
373 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
374 | frame->v4l2_buf.flags = 0; | |
375 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
376 | frame->v4l2_buf.length = frsz; | |
377 | frame->v4l2_buf.memory = gspca_dev->memory; | |
378 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 379 | frame->data = frame->data_end = |
d43fa32f | 380 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 381 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
382 | } |
383 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
3ec342f2 | 384 | gspca_dev->cur_frame = &gspca_dev->frame[0]; |
63eb9546 JFM |
385 | gspca_dev->last_packet_type = DISCARD_PACKET; |
386 | gspca_dev->sequence = 0; | |
d43fa32f | 387 | return 0; |
63eb9546 JFM |
388 | } |
389 | ||
390 | static void frame_free(struct gspca_dev *gspca_dev) | |
391 | { | |
392 | int i; | |
393 | ||
394 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 395 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
396 | rvfree(gspca_dev->frbuf, |
397 | gspca_dev->nframes * gspca_dev->frsz); | |
398 | gspca_dev->frbuf = NULL; | |
399 | for (i = 0; i < gspca_dev->nframes; i++) | |
400 | gspca_dev->frame[i].data = NULL; | |
401 | } | |
402 | gspca_dev->nframes = 0; | |
403 | } | |
404 | ||
d43fa32f | 405 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
406 | { |
407 | struct urb *urb; | |
408 | unsigned int i; | |
409 | ||
410 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 411 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 412 | urb = gspca_dev->urb[i]; |
63eb9546 | 413 | if (urb == NULL) |
d43fa32f | 414 | break; |
63eb9546 | 415 | |
4aa0d037 | 416 | gspca_dev->urb[i] = NULL; |
090264e5 | 417 | usb_kill_urb(urb); |
efab8211 | 418 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
419 | usb_buffer_free(gspca_dev->dev, |
420 | urb->transfer_buffer_length, | |
4aa0d037 | 421 | urb->transfer_buffer, |
63eb9546 | 422 | urb->transfer_dma); |
63eb9546 JFM |
423 | usb_free_urb(urb); |
424 | } | |
63eb9546 JFM |
425 | } |
426 | ||
427 | /* | |
219423c1 | 428 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 429 | */ |
0be01004 | 430 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
6929dc6b | 431 | int xfer) |
63eb9546 JFM |
432 | { |
433 | struct usb_host_endpoint *ep; | |
434 | int i, attr; | |
435 | ||
63eb9546 JFM |
436 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
437 | ep = &alt->endpoint[i]; | |
50e06dee | 438 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 JFM |
439 | if (attr == xfer |
440 | && ep->desc.wMaxPacketSize != 0) | |
50e06dee | 441 | return ep; |
63eb9546 JFM |
442 | } |
443 | return NULL; | |
444 | } | |
445 | ||
446 | /* | |
219423c1 | 447 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
448 | * |
449 | * The endpoint is defined by the subdriver. | |
450 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
451 | * This routine may be called many times when the bandwidth is too small | |
452 | * (the bandwidth is checked on urb submit). | |
453 | */ | |
0be01004 | 454 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
455 | { |
456 | struct usb_interface *intf; | |
457 | struct usb_host_endpoint *ep; | |
6929dc6b | 458 | int xfer, i, ret; |
63eb9546 JFM |
459 | |
460 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 461 | ep = NULL; |
6929dc6b JFM |
462 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
463 | : USB_ENDPOINT_XFER_ISOC; | |
63eb9546 | 464 | i = gspca_dev->alt; /* previous alt setting */ |
a511ba94 HG |
465 | if (gspca_dev->cam.reverse_alts) { |
466 | while (++i < gspca_dev->nbalt) { | |
467 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
468 | if (ep) | |
469 | break; | |
470 | } | |
471 | } else { | |
472 | while (--i >= 0) { | |
473 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
474 | if (ep) | |
475 | break; | |
476 | } | |
63eb9546 | 477 | } |
6a7eba24 | 478 | if (ep == NULL) { |
6929dc6b JFM |
479 | err("no transfer endpoint found"); |
480 | return NULL; | |
63eb9546 | 481 | } |
0be01004 | 482 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 483 | i, ep->desc.bEndpointAddress); |
1c8336d3 | 484 | gspca_dev->alt = i; /* memorize the current alt setting */ |
8dd07ef1 | 485 | if (gspca_dev->nbalt > 1) { |
95d9142c JFM |
486 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); |
487 | if (ret < 0) { | |
6929dc6b | 488 | err("set alt %d err %d", i, ret); |
95d9142c JFM |
489 | return NULL; |
490 | } | |
63eb9546 | 491 | } |
63eb9546 JFM |
492 | return ep; |
493 | } | |
494 | ||
495 | /* | |
0be01004 | 496 | * create the URBs for image transfer |
63eb9546 JFM |
497 | */ |
498 | static int create_urbs(struct gspca_dev *gspca_dev, | |
499 | struct usb_host_endpoint *ep) | |
500 | { | |
501 | struct urb *urb; | |
d43fa32f | 502 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
503 | |
504 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 505 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 506 | |
6929dc6b | 507 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
508 | |
509 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
510 | if (gspca_dev->pkt_size == 0) |
511 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
512 | else | |
513 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
514 | npkt = gspca_dev->cam.npkt; |
515 | if (npkt == 0) | |
516 | npkt = 32; /* default value */ | |
0be01004 JFM |
517 | bsize = psize * npkt; |
518 | PDEBUG(D_STREAM, | |
519 | "isoc %d pkts size %d = bsize:%d", | |
520 | npkt, psize, bsize); | |
51977a8d | 521 | nurbs = DEF_NURBS; |
95d9142c | 522 | } else { /* bulk */ |
0be01004 | 523 | npkt = 0; |
dff369aa | 524 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
525 | if (bsize == 0) |
526 | bsize = psize; | |
0be01004 | 527 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
528 | if (gspca_dev->cam.bulk_nurbs != 0) |
529 | nurbs = gspca_dev->cam.bulk_nurbs; | |
530 | else | |
531 | nurbs = 1; | |
0be01004 JFM |
532 | } |
533 | ||
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 | } | |
db870875 | 540 | gspca_dev->urb[n] = urb; |
4aa0d037 | 541 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
542 | bsize, |
543 | GFP_KERNEL, | |
544 | &urb->transfer_dma); | |
545 | ||
4aa0d037 | 546 | if (urb->transfer_buffer == NULL) { |
db870875 | 547 | err("usb_buffer_alloc failed"); |
63eb9546 JFM |
548 | return -ENOMEM; |
549 | } | |
63eb9546 JFM |
550 | urb->dev = gspca_dev->dev; |
551 | urb->context = gspca_dev; | |
63eb9546 | 552 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
553 | if (npkt != 0) { /* ISOC */ |
554 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
555 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
556 | urb->transfer_flags = URB_ISO_ASAP |
557 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
558 | urb->interval = ep->desc.bInterval; |
559 | urb->complete = isoc_irq; | |
560 | urb->number_of_packets = npkt; | |
561 | for (i = 0; i < npkt; i++) { | |
562 | urb->iso_frame_desc[i].length = psize; | |
563 | urb->iso_frame_desc[i].offset = psize * i; | |
564 | } | |
565 | } else { /* bulk */ | |
566 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
567 | ep->desc.bEndpointAddress), | |
6c49da7f | 568 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 569 | urb->complete = bulk_irq; |
63eb9546 JFM |
570 | } |
571 | } | |
572 | return 0; | |
573 | } | |
574 | ||
575 | /* | |
576 | * start the USB transfer | |
577 | */ | |
578 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
579 | { | |
63eb9546 | 580 | struct usb_host_endpoint *ep; |
db870875 | 581 | struct urb *urb; |
63eb9546 JFM |
582 | int n, ret; |
583 | ||
e2997a72 HG |
584 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
585 | return -ERESTARTSYS; | |
63eb9546 | 586 | |
090264e5 JFM |
587 | if (!gspca_dev->present) { |
588 | ret = -ENODEV; | |
589 | goto out; | |
590 | } | |
591 | ||
d43fa32f JFM |
592 | /* set the higher alternate setting and |
593 | * loop until urb submit succeeds */ | |
a511ba94 HG |
594 | if (gspca_dev->cam.reverse_alts) |
595 | gspca_dev->alt = 0; | |
596 | else | |
597 | gspca_dev->alt = gspca_dev->nbalt; | |
598 | ||
1f53b0b0 JFM |
599 | if (gspca_dev->sd_desc->isoc_init) { |
600 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
601 | if (ret < 0) | |
602 | goto out; | |
603 | } | |
604 | ep = get_ep(gspca_dev); | |
605 | if (ep == NULL) { | |
606 | ret = -EIO; | |
607 | goto out; | |
608 | } | |
63eb9546 | 609 | for (;;) { |
47aaca96 JFM |
610 | if (!gspca_dev->cam.no_urb_create) { |
611 | PDEBUG(D_STREAM, "init transfer alt %d", | |
612 | gspca_dev->alt); | |
613 | ret = create_urbs(gspca_dev, ep); | |
614 | if (ret < 0) { | |
615 | destroy_urbs(gspca_dev); | |
616 | goto out; | |
617 | } | |
db870875 | 618 | } |
63eb9546 | 619 | |
8fe2f1d5 | 620 | /* clear the bulk endpoint */ |
6929dc6b | 621 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 622 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 623 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 624 | |
63eb9546 | 625 | /* start the cam */ |
72ab97ce JFM |
626 | ret = gspca_dev->sd_desc->start(gspca_dev); |
627 | if (ret < 0) { | |
628 | destroy_urbs(gspca_dev); | |
629 | goto out; | |
630 | } | |
63eb9546 | 631 | gspca_dev->streaming = 1; |
63eb9546 | 632 | |
dff369aa | 633 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 634 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
635 | break; |
636 | ||
63eb9546 | 637 | /* submit the URBs */ |
db870875 JFM |
638 | for (n = 0; n < MAX_NURBS; n++) { |
639 | urb = gspca_dev->urb[n]; | |
640 | if (urb == NULL) | |
641 | break; | |
642 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
643 | if (ret < 0) |
644 | break; | |
63eb9546 JFM |
645 | } |
646 | if (ret >= 0) | |
647 | break; | |
1f53b0b0 JFM |
648 | gspca_dev->streaming = 0; |
649 | destroy_urbs(gspca_dev); | |
4bdf4a83 JFM |
650 | if (ret != -ENOSPC) { |
651 | PDEBUG(D_ERR|D_STREAM, | |
652 | "usb_submit_urb alt %d err %d", | |
653 | gspca_dev->alt, ret); | |
1f53b0b0 | 654 | goto out; |
4bdf4a83 | 655 | } |
1f53b0b0 JFM |
656 | |
657 | /* the bandwidth is not wide enough | |
658 | * negociate or try a lower alternate setting */ | |
4bdf4a83 JFM |
659 | PDEBUG(D_ERR|D_STREAM, |
660 | "bandwidth not wide enough - trying again"); | |
1f53b0b0 JFM |
661 | msleep(20); /* wait for kill complete */ |
662 | if (gspca_dev->sd_desc->isoc_nego) { | |
663 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
664 | if (ret < 0) | |
665 | goto out; | |
666 | } else { | |
667 | ep = get_ep(gspca_dev); | |
668 | if (ep == NULL) { | |
669 | ret = -EIO; | |
670 | goto out; | |
671 | } | |
672 | } | |
63eb9546 JFM |
673 | } |
674 | out: | |
675 | mutex_unlock(&gspca_dev->usb_lock); | |
676 | return ret; | |
677 | } | |
678 | ||
679 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
680 | { | |
681 | int ret; | |
682 | ||
8dd07ef1 JFM |
683 | if (gspca_dev->alt == 0) |
684 | return 0; | |
63eb9546 JFM |
685 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); |
686 | if (ret < 0) | |
f955c4fc | 687 | PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret); |
63eb9546 JFM |
688 | return ret; |
689 | } | |
690 | ||
219423c1 | 691 | /* Note: both the queue and the usb locks should be held when calling this */ |
63eb9546 JFM |
692 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
693 | { | |
63eb9546 | 694 | gspca_dev->streaming = 0; |
090264e5 JFM |
695 | if (gspca_dev->present) { |
696 | if (gspca_dev->sd_desc->stopN) | |
697 | gspca_dev->sd_desc->stopN(gspca_dev); | |
698 | destroy_urbs(gspca_dev); | |
d08e2ce0 | 699 | gspca_set_alt0(gspca_dev); |
090264e5 JFM |
700 | } |
701 | ||
702 | /* always call stop0 to free the subdriver's resources */ | |
98522a7b JFM |
703 | if (gspca_dev->sd_desc->stop0) |
704 | gspca_dev->sd_desc->stop0(gspca_dev); | |
705 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 JFM |
706 | } |
707 | ||
d43fa32f | 708 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
709 | { |
710 | int i; | |
711 | ||
712 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
713 | gspca_dev->curr_mode = i; | |
714 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
715 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 716 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
717 | } |
718 | ||
719 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
720 | int width, int height) | |
721 | { | |
722 | int i; | |
723 | ||
d43fa32f JFM |
724 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
725 | if (width >= gspca_dev->cam.cam_mode[i].width | |
726 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
727 | break; |
728 | } | |
63eb9546 JFM |
729 | return i; |
730 | } | |
731 | ||
63eb9546 JFM |
732 | /* |
733 | * search a mode with the right pixel format | |
734 | */ | |
735 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
736 | int mode, | |
737 | int pixfmt) | |
738 | { | |
739 | int modeU, modeD; | |
740 | ||
741 | modeU = modeD = mode; | |
742 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
743 | if (--modeD >= 0) { | |
c2446b3e JFM |
744 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
745 | == pixfmt) | |
63eb9546 JFM |
746 | return modeD; |
747 | } | |
748 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
749 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
750 | == pixfmt) | |
63eb9546 JFM |
751 | return modeU; |
752 | } | |
753 | } | |
754 | return -EINVAL; | |
755 | } | |
756 | ||
af1d9afa BJ |
757 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
758 | static int vidioc_g_register(struct file *file, void *priv, | |
759 | struct v4l2_dbg_register *reg) | |
760 | { | |
761 | int ret; | |
762 | struct gspca_dev *gspca_dev = priv; | |
763 | ||
764 | if (!gspca_dev->sd_desc->get_chip_ident) | |
765 | return -EINVAL; | |
766 | ||
767 | if (!gspca_dev->sd_desc->get_register) | |
768 | return -EINVAL; | |
769 | ||
770 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
771 | return -ERESTARTSYS; | |
8c4ebae4 | 772 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
773 | if (gspca_dev->present) |
774 | ret = gspca_dev->sd_desc->get_register(gspca_dev, reg); | |
775 | else | |
776 | ret = -ENODEV; | |
777 | mutex_unlock(&gspca_dev->usb_lock); | |
778 | ||
779 | return ret; | |
780 | } | |
781 | ||
782 | static int vidioc_s_register(struct file *file, void *priv, | |
783 | struct v4l2_dbg_register *reg) | |
784 | { | |
785 | int ret; | |
786 | struct gspca_dev *gspca_dev = priv; | |
787 | ||
788 | if (!gspca_dev->sd_desc->get_chip_ident) | |
789 | return -EINVAL; | |
790 | ||
791 | if (!gspca_dev->sd_desc->set_register) | |
792 | return -EINVAL; | |
793 | ||
794 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
795 | return -ERESTARTSYS; | |
8c4ebae4 | 796 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
797 | if (gspca_dev->present) |
798 | ret = gspca_dev->sd_desc->set_register(gspca_dev, reg); | |
799 | else | |
800 | ret = -ENODEV; | |
801 | mutex_unlock(&gspca_dev->usb_lock); | |
802 | ||
803 | return ret; | |
804 | } | |
805 | #endif | |
806 | ||
807 | static int vidioc_g_chip_ident(struct file *file, void *priv, | |
808 | struct v4l2_dbg_chip_ident *chip) | |
809 | { | |
810 | int ret; | |
811 | struct gspca_dev *gspca_dev = priv; | |
812 | ||
813 | if (!gspca_dev->sd_desc->get_chip_ident) | |
814 | return -EINVAL; | |
815 | ||
816 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
817 | return -ERESTARTSYS; | |
8c4ebae4 | 818 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
819 | if (gspca_dev->present) |
820 | ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip); | |
821 | else | |
822 | ret = -ENODEV; | |
823 | mutex_unlock(&gspca_dev->usb_lock); | |
824 | ||
825 | return ret; | |
826 | } | |
827 | ||
e078770a | 828 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
829 | struct v4l2_fmtdesc *fmtdesc) |
830 | { | |
831 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 832 | int i, j, index; |
63eb9546 JFM |
833 | __u32 fmt_tb[8]; |
834 | ||
63eb9546 JFM |
835 | /* give an index to each format */ |
836 | index = 0; | |
837 | j = 0; | |
838 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 839 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
840 | j = 0; |
841 | for (;;) { | |
842 | if (fmt_tb[j] == fmt_tb[index]) | |
843 | break; | |
844 | j++; | |
845 | } | |
846 | if (j == index) { | |
847 | if (fmtdesc->index == index) | |
848 | break; /* new format */ | |
849 | index++; | |
80297125 | 850 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
851 | return -EINVAL; |
852 | } | |
853 | } | |
854 | if (i < 0) | |
855 | return -EINVAL; /* no more format */ | |
856 | ||
63eb9546 JFM |
857 | fmtdesc->pixelformat = fmt_tb[index]; |
858 | if (gspca_is_compressed(fmt_tb[index])) | |
859 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
860 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
861 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
862 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
863 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
864 | fmtdesc->description[4] = '\0'; | |
865 | return 0; | |
866 | } | |
867 | ||
e078770a | 868 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
869 | struct v4l2_format *fmt) |
870 | { | |
871 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 872 | int mode; |
63eb9546 | 873 | |
c2446b3e JFM |
874 | mode = gspca_dev->curr_mode; |
875 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
876 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
877 | return 0; |
878 | } | |
879 | ||
e078770a | 880 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
881 | struct v4l2_format *fmt) |
882 | { | |
24c530b4 | 883 | int w, h, mode, mode2; |
63eb9546 | 884 | |
4aa0d037 JFM |
885 | w = fmt->fmt.pix.width; |
886 | h = fmt->fmt.pix.height; | |
d43fa32f | 887 | |
335b3f88 | 888 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
889 | if (gspca_debug & D_CONF) |
890 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
891 | #endif | |
892 | /* search the closest mode for width and height */ | |
893 | mode = wxh_to_mode(gspca_dev, w, h); | |
894 | ||
895 | /* OK if right palette */ | |
c2446b3e JFM |
896 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
897 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
898 | |
899 | /* else, search the closest mode with the same pixel format */ | |
900 | mode2 = gspca_get_mode(gspca_dev, mode, | |
901 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 902 | if (mode2 >= 0) |
63eb9546 | 903 | mode = mode2; |
c2446b3e JFM |
904 | /* else |
905 | ; * no chance, return this mode */ | |
63eb9546 | 906 | } |
c2446b3e JFM |
907 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
908 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
909 | return mode; /* used when s_fmt */ |
910 | } | |
911 | ||
e078770a | 912 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
913 | void *priv, |
914 | struct v4l2_format *fmt) | |
915 | { | |
4aa0d037 | 916 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
917 | int ret; |
918 | ||
e078770a | 919 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
920 | if (ret < 0) |
921 | return ret; | |
922 | return 0; | |
923 | } | |
924 | ||
e078770a | 925 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
926 | struct v4l2_format *fmt) |
927 | { | |
928 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 929 | int ret; |
63eb9546 | 930 | |
e2997a72 HG |
931 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
932 | return -ERESTARTSYS; | |
d43fa32f | 933 | |
e078770a | 934 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
935 | if (ret < 0) |
936 | goto out; | |
937 | ||
d43fa32f JFM |
938 | if (gspca_dev->nframes != 0 |
939 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
940 | ret = -EINVAL; | |
941 | goto out; | |
942 | } | |
943 | ||
50a871fe JFM |
944 | if (ret == gspca_dev->curr_mode) { |
945 | ret = 0; | |
63eb9546 | 946 | goto out; /* same mode */ |
50a871fe | 947 | } |
d43fa32f JFM |
948 | |
949 | if (gspca_dev->streaming) { | |
950 | ret = -EBUSY; | |
951 | goto out; | |
e2997a72 | 952 | } |
4aa0d037 JFM |
953 | gspca_dev->width = fmt->fmt.pix.width; |
954 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
955 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
956 | gspca_dev->curr_mode = ret; | |
d43fa32f | 957 | |
d43fa32f | 958 | ret = 0; |
63eb9546 JFM |
959 | out: |
960 | mutex_unlock(&gspca_dev->queue_lock); | |
961 | return ret; | |
962 | } | |
963 | ||
11c635a2 HG |
964 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
965 | struct v4l2_frmsizeenum *fsize) | |
966 | { | |
967 | struct gspca_dev *gspca_dev = priv; | |
968 | int i; | |
969 | __u32 index = 0; | |
970 | ||
971 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
972 | if (fsize->pixel_format != | |
973 | gspca_dev->cam.cam_mode[i].pixelformat) | |
974 | continue; | |
975 | ||
976 | if (fsize->index == index) { | |
977 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
978 | fsize->discrete.width = | |
979 | gspca_dev->cam.cam_mode[i].width; | |
980 | fsize->discrete.height = | |
981 | gspca_dev->cam.cam_mode[i].height; | |
982 | return 0; | |
983 | } | |
984 | index++; | |
985 | } | |
986 | ||
987 | return -EINVAL; | |
988 | } | |
989 | ||
28ffe77f AO |
990 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
991 | struct v4l2_frmivalenum *fival) | |
992 | { | |
993 | struct gspca_dev *gspca_dev = priv; | |
994 | int mode = wxh_to_mode(gspca_dev, fival->width, fival->height); | |
995 | __u32 i; | |
996 | ||
997 | if (gspca_dev->cam.mode_framerates == NULL || | |
998 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
999 | return -EINVAL; | |
1000 | ||
1001 | if (fival->pixel_format != | |
1002 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1003 | return -EINVAL; | |
1004 | ||
1005 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1006 | if (fival->index == i) { | |
1007 | fival->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1008 | fival->discrete.numerator = 1; | |
1009 | fival->discrete.denominator = | |
1010 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1011 | return 0; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | return -EINVAL; | |
1016 | } | |
1017 | ||
d0182306 | 1018 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 1019 | { |
d0182306 | 1020 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 1021 | |
38c7c036 LP |
1022 | PDEBUG(D_PROBE, "%s released", |
1023 | video_device_node_name(&gspca_dev->vdev)); | |
6b060ffe FZ |
1024 | |
1025 | kfree(gspca_dev->usb_buf); | |
1026 | kfree(gspca_dev); | |
1027 | } | |
1028 | ||
bec43661 | 1029 | static int dev_open(struct file *file) |
63eb9546 JFM |
1030 | { |
1031 | struct gspca_dev *gspca_dev; | |
1032 | int ret; | |
1033 | ||
0d07e240 | 1034 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
a12ca6a6 | 1035 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
1036 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1037 | return -ERESTARTSYS; | |
63eb9546 JFM |
1038 | if (!gspca_dev->present) { |
1039 | ret = -ENODEV; | |
1040 | goto out; | |
1041 | } | |
1042 | ||
012d6b02 | 1043 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
1044 | ret = -EBUSY; |
1045 | goto out; | |
1046 | } | |
5c4fa002 JFM |
1047 | |
1048 | /* protect the subdriver against rmmod */ | |
1049 | if (!try_module_get(gspca_dev->module)) { | |
1050 | ret = -ENODEV; | |
1051 | goto out; | |
1052 | } | |
1053 | ||
63eb9546 | 1054 | gspca_dev->users++; |
6b060ffe | 1055 | |
63eb9546 | 1056 | file->private_data = gspca_dev; |
335b3f88 | 1057 | #ifdef GSPCA_DEBUG |
63eb9546 | 1058 | /* activate the v4l2 debug */ |
d43fa32f | 1059 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 1060 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 1061 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 1062 | else |
a12ca6a6 | 1063 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 1064 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 1065 | #endif |
012d6b02 | 1066 | ret = 0; |
63eb9546 JFM |
1067 | out: |
1068 | mutex_unlock(&gspca_dev->queue_lock); | |
1069 | if (ret != 0) | |
1070 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
1071 | else | |
d43fa32f | 1072 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
1073 | return ret; |
1074 | } | |
1075 | ||
bec43661 | 1076 | static int dev_close(struct file *file) |
63eb9546 JFM |
1077 | { |
1078 | struct gspca_dev *gspca_dev = file->private_data; | |
1079 | ||
0d07e240 | 1080 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
e2997a72 HG |
1081 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1082 | return -ERESTARTSYS; | |
1083 | gspca_dev->users--; | |
e2997a72 | 1084 | |
5b77ae77 | 1085 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1086 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
1087 | if (gspca_dev->streaming) { |
1088 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1089 | gspca_dev->usb_err = 0; |
a1e8288b JFM |
1090 | gspca_stream_off(gspca_dev); |
1091 | mutex_unlock(&gspca_dev->usb_lock); | |
1092 | } | |
4aa0d037 | 1093 | frame_free(gspca_dev); |
efab8211 | 1094 | gspca_dev->capt_file = NULL; |
d43fa32f | 1095 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 1096 | } |
d43fa32f | 1097 | file->private_data = NULL; |
5c4fa002 | 1098 | module_put(gspca_dev->module); |
63eb9546 | 1099 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1100 | |
d43fa32f | 1101 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1102 | |
63eb9546 JFM |
1103 | return 0; |
1104 | } | |
1105 | ||
1106 | static int vidioc_querycap(struct file *file, void *priv, | |
1107 | struct v4l2_capability *cap) | |
1108 | { | |
1109 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 1110 | int ret; |
63eb9546 | 1111 | |
090264e5 JFM |
1112 | /* protect the access to the usb device */ |
1113 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1114 | return -ERESTARTSYS; | |
1115 | if (!gspca_dev->present) { | |
1116 | ret = -ENODEV; | |
1117 | goto out; | |
1118 | } | |
63eb9546 | 1119 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); |
c6edaf16 JFM |
1120 | if (gspca_dev->dev->product != NULL) { |
1121 | strncpy(cap->card, gspca_dev->dev->product, | |
1122 | sizeof cap->card); | |
1123 | } else { | |
1124 | snprintf(cap->card, sizeof cap->card, | |
1125 | "USB Camera (%04x:%04x)", | |
1126 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1127 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1128 | } | |
5932028f | 1129 | usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info)); |
63eb9546 JFM |
1130 | cap->version = DRIVER_VERSION_NUMBER; |
1131 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
1132 | | V4L2_CAP_STREAMING | |
1133 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
1134 | ret = 0; |
1135 | out: | |
1136 | mutex_unlock(&gspca_dev->usb_lock); | |
1137 | return ret; | |
63eb9546 JFM |
1138 | } |
1139 | ||
a0001a28 HG |
1140 | static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev, |
1141 | int id) | |
1142 | { | |
1143 | const struct ctrl *ctrls; | |
1144 | int i; | |
1145 | ||
1146 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1147 | i < gspca_dev->sd_desc->nctrls; | |
1148 | i++, ctrls++) { | |
1149 | if (gspca_dev->ctrl_dis & (1 << i)) | |
1150 | continue; | |
1151 | if (id == ctrls->qctrl.id) | |
1152 | return ctrls; | |
1153 | } | |
1154 | return NULL; | |
1155 | } | |
1156 | ||
63eb9546 JFM |
1157 | static int vidioc_queryctrl(struct file *file, void *priv, |
1158 | struct v4l2_queryctrl *q_ctrl) | |
1159 | { | |
1160 | struct gspca_dev *gspca_dev = priv; | |
a0001a28 HG |
1161 | const struct ctrl *ctrls; |
1162 | int i; | |
6a7eba24 JFM |
1163 | u32 id; |
1164 | ||
a0001a28 | 1165 | ctrls = NULL; |
6a7eba24 JFM |
1166 | id = q_ctrl->id; |
1167 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1168 | id &= V4L2_CTRL_ID_MASK; | |
1169 | id++; | |
1170 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
a0001a28 | 1171 | if (gspca_dev->ctrl_dis & (1 << i)) |
f50ba1be | 1172 | continue; |
b8bfb5fb | 1173 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be | 1174 | continue; |
b8bfb5fb | 1175 | if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id |
a0001a28 | 1176 | > ctrls->qctrl.id) |
b8bfb5fb | 1177 | continue; |
a0001a28 | 1178 | ctrls = &gspca_dev->sd_desc->ctrls[i]; |
63eb9546 | 1179 | } |
83955556 JFM |
1180 | if (ctrls == NULL) |
1181 | return -EINVAL; | |
a0001a28 HG |
1182 | } else { |
1183 | ctrls = get_ctrl(gspca_dev, id); | |
83955556 JFM |
1184 | if (ctrls == NULL) |
1185 | return -EINVAL; | |
4af85668 | 1186 | i = ctrls - gspca_dev->sd_desc->ctrls; |
63eb9546 | 1187 | } |
a0001a28 | 1188 | memcpy(q_ctrl, ctrls, sizeof *q_ctrl); |
4af85668 JFM |
1189 | if (gspca_dev->ctrl_inac & (1 << i)) |
1190 | q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
f50ba1be | 1191 | return 0; |
63eb9546 JFM |
1192 | } |
1193 | ||
1194 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1195 | struct v4l2_control *ctrl) | |
1196 | { | |
1197 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1198 | const struct ctrl *ctrls; |
a0001a28 | 1199 | int ret; |
63eb9546 | 1200 | |
a0001a28 HG |
1201 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1202 | if (ctrls == NULL) | |
1203 | return -EINVAL; | |
1204 | ||
1205 | if (ctrl->value < ctrls->qctrl.minimum | |
1206 | || ctrl->value > ctrls->qctrl.maximum) | |
1207 | return -ERANGE; | |
1208 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
1209 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1210 | return -ERESTARTSYS; | |
8c4ebae4 | 1211 | gspca_dev->usb_err = 0; |
a0001a28 HG |
1212 | if (gspca_dev->present) |
1213 | ret = ctrls->set(gspca_dev, ctrl->value); | |
1214 | else | |
1215 | ret = -ENODEV; | |
1216 | mutex_unlock(&gspca_dev->usb_lock); | |
1217 | return ret; | |
63eb9546 JFM |
1218 | } |
1219 | ||
1220 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1221 | struct v4l2_control *ctrl) | |
1222 | { | |
1223 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1224 | const struct ctrl *ctrls; |
a0001a28 | 1225 | int ret; |
63eb9546 | 1226 | |
a0001a28 HG |
1227 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1228 | if (ctrls == NULL) | |
1229 | return -EINVAL; | |
1230 | ||
1231 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1232 | return -ERESTARTSYS; | |
8c4ebae4 | 1233 | gspca_dev->usb_err = 0; |
a0001a28 HG |
1234 | if (gspca_dev->present) |
1235 | ret = ctrls->get(gspca_dev, &ctrl->value); | |
1236 | else | |
1237 | ret = -ENODEV; | |
1238 | mutex_unlock(&gspca_dev->usb_lock); | |
1239 | return ret; | |
63eb9546 JFM |
1240 | } |
1241 | ||
f955c4fc JFM |
1242 | /*fixme: have an audio flag in gspca_dev?*/ |
1243 | static int vidioc_s_audio(struct file *file, void *priv, | |
1244 | struct v4l2_audio *audio) | |
1245 | { | |
1246 | if (audio->index != 0) | |
1247 | return -EINVAL; | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int vidioc_g_audio(struct file *file, void *priv, | |
1252 | struct v4l2_audio *audio) | |
1253 | { | |
f955c4fc JFM |
1254 | strcpy(audio->name, "Microphone"); |
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | static int vidioc_enumaudio(struct file *file, void *priv, | |
1259 | struct v4l2_audio *audio) | |
1260 | { | |
1261 | if (audio->index != 0) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | strcpy(audio->name, "Microphone"); | |
1265 | audio->capability = 0; | |
1266 | audio->mode = 0; | |
1267 | return 0; | |
1268 | } | |
1269 | ||
63eb9546 JFM |
1270 | static int vidioc_querymenu(struct file *file, void *priv, |
1271 | struct v4l2_querymenu *qmenu) | |
1272 | { | |
1273 | struct gspca_dev *gspca_dev = priv; | |
1274 | ||
1275 | if (!gspca_dev->sd_desc->querymenu) | |
1276 | return -EINVAL; | |
1277 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1278 | } | |
1279 | ||
1280 | static int vidioc_enum_input(struct file *file, void *priv, | |
1281 | struct v4l2_input *input) | |
1282 | { | |
1283 | struct gspca_dev *gspca_dev = priv; | |
1284 | ||
1285 | if (input->index != 0) | |
1286 | return -EINVAL; | |
63eb9546 | 1287 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1288 | input->status = gspca_dev->cam.input_flags; |
63eb9546 JFM |
1289 | strncpy(input->name, gspca_dev->sd_desc->name, |
1290 | sizeof input->name); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1295 | { | |
1296 | *i = 0; | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1301 | { | |
1302 | if (i > 0) | |
1303 | return -EINVAL; | |
1304 | return (0); | |
1305 | } | |
1306 | ||
1307 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1308 | struct v4l2_requestbuffers *rb) | |
1309 | { | |
1310 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1311 | int i, ret = 0; |
63eb9546 | 1312 | |
d43fa32f | 1313 | switch (rb->memory) { |
5b77ae77 | 1314 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1315 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1316 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1317 | break; |
d43fa32f | 1318 | default: |
63eb9546 | 1319 | return -EINVAL; |
d43fa32f | 1320 | } |
e2997a72 HG |
1321 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1322 | return -ERESTARTSYS; | |
d43fa32f | 1323 | |
5b77ae77 JFM |
1324 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1325 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1326 | ret = -EBUSY; |
1327 | goto out; | |
1328 | } | |
d43fa32f | 1329 | |
5b77ae77 JFM |
1330 | /* only one file may do the capture */ |
1331 | if (gspca_dev->capt_file != NULL | |
1332 | && gspca_dev->capt_file != file) { | |
1333 | ret = -EBUSY; | |
1334 | goto out; | |
1335 | } | |
1336 | ||
1337 | /* if allocated, the buffers must not be mapped */ | |
1338 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1339 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1340 | ret = -EBUSY; |
1341 | goto out; | |
1342 | } | |
5b77ae77 JFM |
1343 | } |
1344 | ||
1345 | /* stop streaming */ | |
1346 | if (gspca_dev->streaming) { | |
1347 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1348 | gspca_dev->usb_err = 0; |
5b77ae77 JFM |
1349 | gspca_stream_off(gspca_dev); |
1350 | mutex_unlock(&gspca_dev->usb_lock); | |
1351 | } | |
1352 | ||
1353 | /* free the previous allocated buffers, if any */ | |
1354 | if (gspca_dev->nframes != 0) { | |
1355 | frame_free(gspca_dev); | |
1356 | gspca_dev->capt_file = NULL; | |
1357 | } | |
1358 | if (rb->count == 0) /* unrequest */ | |
1359 | goto out; | |
1360 | gspca_dev->memory = rb->memory; | |
1361 | ret = frame_alloc(gspca_dev, rb->count); | |
1362 | if (ret == 0) { | |
1363 | rb->count = gspca_dev->nframes; | |
1364 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1365 | } |
1366 | out: | |
63eb9546 JFM |
1367 | mutex_unlock(&gspca_dev->queue_lock); |
1368 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1369 | return ret; | |
1370 | } | |
1371 | ||
1372 | static int vidioc_querybuf(struct file *file, void *priv, | |
1373 | struct v4l2_buffer *v4l2_buf) | |
1374 | { | |
1375 | struct gspca_dev *gspca_dev = priv; | |
1376 | struct gspca_frame *frame; | |
1377 | ||
13752bd9 | 1378 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1379 | || v4l2_buf->index >= gspca_dev->nframes) |
1380 | return -EINVAL; | |
1381 | ||
1382 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1383 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | static int vidioc_streamon(struct file *file, void *priv, | |
1388 | enum v4l2_buf_type buf_type) | |
1389 | { | |
1390 | struct gspca_dev *gspca_dev = priv; | |
1391 | int ret; | |
1392 | ||
63eb9546 JFM |
1393 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1394 | return -EINVAL; | |
e2997a72 HG |
1395 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1396 | return -ERESTARTSYS; | |
090264e5 | 1397 | |
1edabe71 JFM |
1398 | if (gspca_dev->nframes == 0 |
1399 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1400 | ret = -EINVAL; |
1401 | goto out; | |
1402 | } | |
1403 | if (!gspca_dev->streaming) { | |
1404 | ret = gspca_init_transfer(gspca_dev); | |
1405 | if (ret < 0) | |
1406 | goto out; | |
1407 | } | |
335b3f88 | 1408 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1409 | if (gspca_debug & D_STREAM) { |
1410 | PDEBUG_MODE("stream on OK", | |
1411 | gspca_dev->pixfmt, | |
1412 | gspca_dev->width, | |
1413 | gspca_dev->height); | |
1414 | } | |
1415 | #endif | |
e2997a72 | 1416 | ret = 0; |
63eb9546 JFM |
1417 | out: |
1418 | mutex_unlock(&gspca_dev->queue_lock); | |
1419 | return ret; | |
1420 | } | |
1421 | ||
1422 | static int vidioc_streamoff(struct file *file, void *priv, | |
1423 | enum v4l2_buf_type buf_type) | |
1424 | { | |
1425 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1426 | int i, ret; |
63eb9546 | 1427 | |
63eb9546 JFM |
1428 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1429 | return -EINVAL; | |
4aa0d037 JFM |
1430 | if (!gspca_dev->streaming) |
1431 | return 0; | |
1432 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1433 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1434 | |
1435 | /* stop streaming */ | |
4aa0d037 JFM |
1436 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1437 | ret = -ERESTARTSYS; | |
1438 | goto out; | |
63eb9546 | 1439 | } |
8c4ebae4 | 1440 | gspca_dev->usb_err = 0; |
4aa0d037 | 1441 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1442 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1443 | |
1444 | /* empty the application queues */ | |
1445 | for (i = 0; i < gspca_dev->nframes; i++) | |
1446 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1447 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1448 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1449 | gspca_dev->sequence = 0; | |
5b77ae77 | 1450 | ret = 0; |
4aa0d037 JFM |
1451 | out: |
1452 | mutex_unlock(&gspca_dev->queue_lock); | |
1453 | return ret; | |
63eb9546 JFM |
1454 | } |
1455 | ||
1456 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1457 | struct v4l2_jpegcompression *jpegcomp) | |
1458 | { | |
1459 | struct gspca_dev *gspca_dev = priv; | |
1460 | int ret; | |
1461 | ||
1462 | if (!gspca_dev->sd_desc->get_jcomp) | |
1463 | return -EINVAL; | |
e2997a72 HG |
1464 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1465 | return -ERESTARTSYS; | |
8c4ebae4 | 1466 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1467 | if (gspca_dev->present) |
1468 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1469 | else | |
1470 | ret = -ENODEV; | |
63eb9546 JFM |
1471 | mutex_unlock(&gspca_dev->usb_lock); |
1472 | return ret; | |
1473 | } | |
1474 | ||
1475 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1476 | struct v4l2_jpegcompression *jpegcomp) | |
1477 | { | |
1478 | struct gspca_dev *gspca_dev = priv; | |
1479 | int ret; | |
1480 | ||
63eb9546 JFM |
1481 | if (!gspca_dev->sd_desc->set_jcomp) |
1482 | return -EINVAL; | |
f86d4a91 JP |
1483 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1484 | return -ERESTARTSYS; | |
8c4ebae4 | 1485 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1486 | if (gspca_dev->present) |
1487 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1488 | else | |
1489 | ret = -ENODEV; | |
63eb9546 JFM |
1490 | mutex_unlock(&gspca_dev->usb_lock); |
1491 | return ret; | |
1492 | } | |
1493 | ||
1494 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1495 | struct v4l2_streamparm *parm) | |
1496 | { | |
1497 | struct gspca_dev *gspca_dev = priv; | |
1498 | ||
63eb9546 | 1499 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1500 | |
1501 | if (gspca_dev->sd_desc->get_streamparm) { | |
1502 | int ret; | |
1503 | ||
1504 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1505 | return -ERESTARTSYS; | |
8c4ebae4 | 1506 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1507 | if (gspca_dev->present) |
1508 | ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, | |
1509 | parm); | |
1510 | else | |
1511 | ret = -ENODEV; | |
627a5ef7 JP |
1512 | mutex_unlock(&gspca_dev->usb_lock); |
1513 | return ret; | |
1514 | } | |
1515 | ||
63eb9546 JFM |
1516 | return 0; |
1517 | } | |
1518 | ||
1519 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1520 | struct v4l2_streamparm *parm) | |
1521 | { | |
1522 | struct gspca_dev *gspca_dev = priv; | |
1523 | int n; | |
1524 | ||
63eb9546 JFM |
1525 | n = parm->parm.capture.readbuffers; |
1526 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1527 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1528 | else | |
1529 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1530 | |
1531 | if (gspca_dev->sd_desc->set_streamparm) { | |
1532 | int ret; | |
1533 | ||
1534 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1535 | return -ERESTARTSYS; | |
8c4ebae4 | 1536 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1537 | if (gspca_dev->present) |
1538 | ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, | |
1539 | parm); | |
1540 | else | |
1541 | ret = -ENODEV; | |
627a5ef7 JP |
1542 | mutex_unlock(&gspca_dev->usb_lock); |
1543 | return ret; | |
1544 | } | |
1545 | ||
63eb9546 JFM |
1546 | return 0; |
1547 | } | |
1548 | ||
1549 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
1550 | static int vidiocgmbuf(struct file *file, void *priv, | |
1551 | struct video_mbuf *mbuf) | |
1552 | { | |
1553 | struct gspca_dev *gspca_dev = file->private_data; | |
1554 | int i; | |
1555 | ||
1556 | PDEBUG(D_STREAM, "cgmbuf"); | |
1557 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1558 | int ret; |
6a7eba24 JFM |
1559 | |
1560 | { | |
1561 | struct v4l2_format fmt; | |
1562 | ||
6a7eba24 JFM |
1563 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1564 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1565 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1566 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1567 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1568 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1569 | if (ret != 0) |
1570 | return ret; | |
1571 | } | |
1572 | { | |
1573 | struct v4l2_requestbuffers rb; | |
1574 | ||
1575 | memset(&rb, 0, sizeof rb); | |
1576 | rb.count = 4; | |
1577 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1578 | rb.memory = V4L2_MEMORY_MMAP; | |
1579 | ret = vidioc_reqbufs(file, priv, &rb); | |
1580 | if (ret != 0) | |
1581 | return ret; | |
1582 | } | |
63eb9546 JFM |
1583 | } |
1584 | mbuf->frames = gspca_dev->nframes; | |
1585 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1586 | for (i = 0; i < mbuf->frames; i++) | |
1587 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1588 | return 0; | |
1589 | } | |
1590 | #endif | |
1591 | ||
1592 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1593 | { | |
1594 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1595 | struct gspca_frame *frame; |
63eb9546 JFM |
1596 | struct page *page; |
1597 | unsigned long addr, start, size; | |
1598 | int i, ret; | |
63eb9546 JFM |
1599 | |
1600 | start = vma->vm_start; | |
1601 | size = vma->vm_end - vma->vm_start; | |
1602 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1603 | ||
e2997a72 HG |
1604 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1605 | return -ERESTARTSYS; | |
63eb9546 JFM |
1606 | if (!gspca_dev->present) { |
1607 | ret = -ENODEV; | |
4aa0d037 JFM |
1608 | goto out; |
1609 | } | |
1610 | if (gspca_dev->capt_file != file) { | |
1611 | ret = -EINVAL; | |
1612 | goto out; | |
63eb9546 JFM |
1613 | } |
1614 | ||
efab8211 | 1615 | frame = NULL; |
63eb9546 JFM |
1616 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1617 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1618 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1619 | break; | |
1620 | } | |
1621 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1622 | == vma->vm_pgoff) { | |
1623 | frame = &gspca_dev->frame[i]; | |
1624 | break; | |
1625 | } | |
1626 | } | |
efab8211 | 1627 | if (frame == NULL) { |
63eb9546 JFM |
1628 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1629 | ret = -EINVAL; | |
4aa0d037 | 1630 | goto out; |
63eb9546 JFM |
1631 | } |
1632 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1633 | /* v4l1 maps all the buffers */ |
1634 | if (i != 0 | |
1635 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1636 | #endif |
ac0d6df6 | 1637 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1638 | PDEBUG(D_STREAM, "mmap bad size"); |
1639 | ret = -EINVAL; | |
4aa0d037 | 1640 | goto out; |
63eb9546 JFM |
1641 | } |
1642 | ||
1643 | /* | |
1644 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1645 | * device. It also prevents the region from being core dumped. | |
1646 | */ | |
1647 | vma->vm_flags |= VM_IO; | |
1648 | ||
1649 | addr = (unsigned long) frame->data; | |
1650 | while (size > 0) { | |
1651 | page = vmalloc_to_page((void *) addr); | |
1652 | ret = vm_insert_page(vma, start, page); | |
1653 | if (ret < 0) | |
4aa0d037 | 1654 | goto out; |
63eb9546 JFM |
1655 | start += PAGE_SIZE; |
1656 | addr += PAGE_SIZE; | |
1657 | size -= PAGE_SIZE; | |
1658 | } | |
1659 | ||
d50e257e | 1660 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1661 | vma->vm_private_data = frame; |
1662 | gspca_vm_open(vma); | |
e2997a72 | 1663 | ret = 0; |
4aa0d037 | 1664 | out: |
63eb9546 JFM |
1665 | mutex_unlock(&gspca_dev->queue_lock); |
1666 | return ret; | |
1667 | } | |
1668 | ||
63eb9546 JFM |
1669 | /* |
1670 | * wait for a video frame | |
1671 | * | |
1672 | * If a frame is ready, its index is returned. | |
1673 | */ | |
d43fa32f | 1674 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1675 | int nonblock_ing) |
1676 | { | |
1677 | struct gspca_frame *frame; | |
1678 | int i, j, ret; | |
1679 | ||
d43fa32f | 1680 | /* check if a frame is ready */ |
63eb9546 JFM |
1681 | i = gspca_dev->fr_o; |
1682 | j = gspca_dev->fr_queue[i]; | |
1683 | frame = &gspca_dev->frame[j]; | |
63eb9546 | 1684 | |
181b704f HG |
1685 | if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) { |
1686 | if (nonblock_ing) | |
1687 | return -EAGAIN; | |
1688 | ||
1689 | /* wait till a frame is ready */ | |
4aa0d037 | 1690 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
181b704f HG |
1691 | (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) || |
1692 | !gspca_dev->streaming || !gspca_dev->present, | |
1693 | msecs_to_jiffies(3000)); | |
1694 | if (ret < 0) | |
1695 | return ret; | |
1696 | if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) | |
e2997a72 | 1697 | return -EIO; |
63eb9546 | 1698 | } |
181b704f | 1699 | |
63eb9546 JFM |
1700 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1701 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1702 | gspca_dev->fr_q, | |
1703 | gspca_dev->fr_i, | |
1704 | gspca_dev->fr_o); | |
e2997a72 | 1705 | |
739570bb JFM |
1706 | if (gspca_dev->sd_desc->dq_callback) { |
1707 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1708 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1709 | if (gspca_dev->present) |
1710 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1711 | mutex_unlock(&gspca_dev->usb_lock); |
1712 | } | |
63eb9546 JFM |
1713 | return j; |
1714 | } | |
1715 | ||
1716 | /* | |
1717 | * dequeue a video buffer | |
1718 | * | |
1719 | * If nonblock_ing is false, block until a buffer is available. | |
1720 | */ | |
1721 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1722 | struct v4l2_buffer *v4l2_buf) | |
1723 | { | |
1724 | struct gspca_dev *gspca_dev = priv; | |
1725 | struct gspca_frame *frame; | |
1726 | int i, ret; | |
1727 | ||
1728 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 | 1729 | if (v4l2_buf->memory != gspca_dev->memory) |
63eb9546 | 1730 | return -EINVAL; |
5b77ae77 | 1731 | |
090264e5 JFM |
1732 | if (!gspca_dev->present) |
1733 | return -ENODEV; | |
1734 | ||
5b77ae77 JFM |
1735 | /* if not streaming, be sure the application will not loop forever */ |
1736 | if (!(file->f_flags & O_NONBLOCK) | |
1737 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1738 | return -EINVAL; |
1739 | ||
5b77ae77 JFM |
1740 | /* only the capturing file may dequeue */ |
1741 | if (gspca_dev->capt_file != file) | |
1742 | return -EINVAL; | |
1743 | ||
1744 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1745 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1746 | return -ERESTARTSYS; | |
1747 | ||
d43fa32f | 1748 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1749 | if (ret < 0) |
4aa0d037 | 1750 | goto out; |
63eb9546 JFM |
1751 | i = ret; /* frame index */ |
1752 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1753 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1754 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1755 | frame->data, |
1756 | frame->v4l2_buf.bytesused)) { | |
1757 | PDEBUG(D_ERR|D_STREAM, | |
1758 | "dqbuf cp to user failed"); | |
1759 | ret = -EFAULT; | |
1760 | goto out; | |
1761 | } | |
1762 | } | |
63eb9546 JFM |
1763 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1764 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1765 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1766 | ret = 0; | |
4aa0d037 | 1767 | out: |
63eb9546 JFM |
1768 | mutex_unlock(&gspca_dev->read_lock); |
1769 | return ret; | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * queue a video buffer | |
1774 | * | |
1775 | * Attempting to queue a buffer that has already been | |
1776 | * queued will return -EINVAL. | |
1777 | */ | |
1778 | static int vidioc_qbuf(struct file *file, void *priv, | |
1779 | struct v4l2_buffer *v4l2_buf) | |
1780 | { | |
1781 | struct gspca_dev *gspca_dev = priv; | |
1782 | struct gspca_frame *frame; | |
1783 | int i, index, ret; | |
1784 | ||
1785 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1786 | |
5b77ae77 JFM |
1787 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1788 | return -ERESTARTSYS; | |
1789 | ||
63eb9546 JFM |
1790 | index = v4l2_buf->index; |
1791 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1792 | PDEBUG(D_FRAM, |
63eb9546 | 1793 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1794 | ret = -EINVAL; |
1795 | goto out; | |
63eb9546 | 1796 | } |
5b77ae77 | 1797 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1798 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1799 | ret = -EINVAL; |
1800 | goto out; | |
63eb9546 | 1801 | } |
e2997a72 | 1802 | |
5b77ae77 | 1803 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1804 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1805 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1806 | ret = -EINVAL; |
1807 | goto out; | |
1808 | } | |
1809 | ||
1810 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1811 | |
d43fa32f | 1812 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1813 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1814 | frame->v4l2_buf.length = v4l2_buf->length; | |
1815 | } | |
1816 | ||
1817 | /* put the buffer in the 'queued' queue */ | |
1818 | i = gspca_dev->fr_q; | |
1819 | gspca_dev->fr_queue[i] = index; | |
8c32aa59 JFM |
1820 | if (gspca_dev->fr_i == i) |
1821 | gspca_dev->cur_frame = frame; | |
63eb9546 JFM |
1822 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; |
1823 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1824 | gspca_dev->fr_q, | |
1825 | gspca_dev->fr_i, | |
1826 | gspca_dev->fr_o); | |
1827 | ||
1828 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1829 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1830 | ret = 0; | |
1831 | out: | |
1832 | mutex_unlock(&gspca_dev->queue_lock); | |
1833 | return ret; | |
1834 | } | |
1835 | ||
d43fa32f JFM |
1836 | /* |
1837 | * allocate the resources for read() | |
1838 | */ | |
1839 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1840 | struct file *file) | |
63eb9546 | 1841 | { |
63eb9546 | 1842 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1843 | int i, ret; |
63eb9546 | 1844 | |
d43fa32f | 1845 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1846 | if (gspca_dev->nframes == 0) { |
1847 | struct v4l2_requestbuffers rb; | |
1848 | ||
1849 | memset(&rb, 0, sizeof rb); | |
1850 | rb.count = gspca_dev->nbufread; | |
1851 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1852 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1853 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1854 | if (ret != 0) { | |
d43fa32f | 1855 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1856 | return ret; |
1857 | } | |
1858 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1859 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1860 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1861 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1862 | v4l2_buf.index = i; | |
63eb9546 JFM |
1863 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1864 | if (ret != 0) { | |
1865 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1866 | return ret; | |
1867 | } | |
1868 | } | |
d43fa32f JFM |
1869 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1870 | } | |
4aa0d037 | 1871 | |
d43fa32f JFM |
1872 | /* start streaming */ |
1873 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1874 | if (ret != 0) | |
1875 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1876 | return ret; | |
1877 | } | |
1878 | ||
1879 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1880 | { | |
1881 | struct gspca_dev *gspca_dev = file->private_data; | |
1882 | int i, ret; | |
1883 | ||
1884 | PDEBUG(D_FRAM, "poll"); | |
1885 | ||
1886 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 1887 | |
5b77ae77 JFM |
1888 | /* if reqbufs is not done, the user would use read() */ |
1889 | if (gspca_dev->nframes == 0) { | |
1890 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1891 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1892 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1893 | if (ret != 0) |
1894 | return POLLERR; | |
63eb9546 JFM |
1895 | } |
1896 | ||
d43fa32f JFM |
1897 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1898 | return POLLERR; | |
d43fa32f | 1899 | |
5b77ae77 | 1900 | /* check the next incoming buffer */ |
d43fa32f JFM |
1901 | i = gspca_dev->fr_o; |
1902 | i = gspca_dev->fr_queue[i]; | |
1903 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1904 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1905 | else | |
1906 | ret = 0; | |
d43fa32f | 1907 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
1908 | if (!gspca_dev->present) |
1909 | return POLLHUP; | |
d43fa32f JFM |
1910 | return ret; |
1911 | } | |
1912 | ||
1913 | static ssize_t dev_read(struct file *file, char __user *data, | |
1914 | size_t count, loff_t *ppos) | |
1915 | { | |
1916 | struct gspca_dev *gspca_dev = file->private_data; | |
1917 | struct gspca_frame *frame; | |
1918 | struct v4l2_buffer v4l2_buf; | |
1919 | struct timeval timestamp; | |
82643d0e | 1920 | int n, ret, ret2; |
d43fa32f | 1921 | |
a9e11134 | 1922 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1923 | if (!gspca_dev->present) |
1924 | return -ENODEV; | |
1925 | switch (gspca_dev->memory) { | |
1926 | case GSPCA_MEMORY_NO: /* first time */ | |
1927 | ret = read_alloc(gspca_dev, file); | |
1928 | if (ret != 0) | |
1929 | return ret; | |
1930 | break; | |
1931 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1932 | if (gspca_dev->capt_file == file) |
1933 | break; | |
1934 | /* fall thru */ | |
d43fa32f JFM |
1935 | default: |
1936 | return -EINVAL; | |
1937 | } | |
1938 | ||
63eb9546 JFM |
1939 | /* get a frame */ |
1940 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1941 | timestamp.tv_sec--; | |
82643d0e JFM |
1942 | n = 2; |
1943 | for (;;) { | |
63eb9546 JFM |
1944 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1945 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1946 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1947 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1948 | if (ret != 0) { | |
1949 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1950 | return ret; | |
1951 | } | |
1952 | ||
1953 | /* if the process slept for more than 1 second, | |
219423c1 | 1954 | * get a newer frame */ |
63eb9546 | 1955 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1956 | if (--n < 0) |
1957 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1958 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1959 | break; | |
1960 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1961 | if (ret != 0) { | |
1962 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1963 | return ret; | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | /* copy the frame */ | |
ac0d6df6 JFM |
1968 | if (count > frame->v4l2_buf.bytesused) |
1969 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1970 | ret = copy_to_user(data, frame->data, count); |
1971 | if (ret != 0) { | |
1972 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1973 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1974 | ret = -EFAULT; |
1975 | goto out; | |
1976 | } | |
1977 | ret = count; | |
1978 | out: | |
1979 | /* in each case, requeue the buffer */ | |
1980 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1981 | if (ret2 != 0) | |
1982 | return ret2; | |
1983 | return ret; | |
1984 | } | |
1985 | ||
bec43661 | 1986 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
1987 | .owner = THIS_MODULE, |
1988 | .open = dev_open, | |
1989 | .release = dev_close, | |
1990 | .read = dev_read, | |
1991 | .mmap = dev_mmap, | |
bec43661 | 1992 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
1993 | .poll = dev_poll, |
1994 | }; | |
1995 | ||
a399810c | 1996 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1997 | .vidioc_querycap = vidioc_querycap, |
1998 | .vidioc_dqbuf = vidioc_dqbuf, | |
1999 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
2000 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
2001 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
2002 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
2003 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
2004 | .vidioc_streamon = vidioc_streamon, |
2005 | .vidioc_queryctrl = vidioc_queryctrl, | |
2006 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
2007 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
f955c4fc JFM |
2008 | .vidioc_g_audio = vidioc_g_audio, |
2009 | .vidioc_s_audio = vidioc_s_audio, | |
2010 | .vidioc_enumaudio = vidioc_enumaudio, | |
63eb9546 JFM |
2011 | .vidioc_querymenu = vidioc_querymenu, |
2012 | .vidioc_enum_input = vidioc_enum_input, | |
2013 | .vidioc_g_input = vidioc_g_input, | |
2014 | .vidioc_s_input = vidioc_s_input, | |
2015 | .vidioc_reqbufs = vidioc_reqbufs, | |
2016 | .vidioc_querybuf = vidioc_querybuf, | |
2017 | .vidioc_streamoff = vidioc_streamoff, | |
2018 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
2019 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
2020 | .vidioc_g_parm = vidioc_g_parm, | |
2021 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2022 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2023 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa BJ |
2024 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
2025 | .vidioc_g_register = vidioc_g_register, | |
2026 | .vidioc_s_register = vidioc_s_register, | |
2027 | #endif | |
2028 | .vidioc_g_chip_ident = vidioc_g_chip_ident, | |
63eb9546 JFM |
2029 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
2030 | .vidiocgmbuf = vidiocgmbuf, | |
2031 | #endif | |
2032 | }; | |
2033 | ||
a399810c HV |
2034 | static struct video_device gspca_template = { |
2035 | .name = "gspca main driver", | |
a399810c HV |
2036 | .fops = &dev_fops, |
2037 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 2038 | .release = gspca_release, |
a399810c HV |
2039 | }; |
2040 | ||
63eb9546 JFM |
2041 | /* |
2042 | * probe and create a new gspca device | |
2043 | * | |
2044 | * This function must be called by the sub-driver when it is | |
2045 | * called for probing a new device. | |
2046 | */ | |
2047 | int gspca_dev_probe(struct usb_interface *intf, | |
2048 | const struct usb_device_id *id, | |
2049 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2050 | int dev_size, |
2051 | struct module *module) | |
63eb9546 JFM |
2052 | { |
2053 | struct usb_interface_descriptor *interface; | |
2054 | struct gspca_dev *gspca_dev; | |
2055 | struct usb_device *dev = interface_to_usbdev(intf); | |
2056 | int ret; | |
63eb9546 | 2057 | |
6a7eba24 | 2058 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
2059 | |
2060 | /* we don't handle multi-config cameras */ | |
0d07e240 JFM |
2061 | if (dev->descriptor.bNumConfigurations != 1) { |
2062 | PDEBUG(D_ERR, "Too many config"); | |
63eb9546 | 2063 | return -ENODEV; |
0d07e240 | 2064 | } |
63eb9546 | 2065 | interface = &intf->cur_altsetting->desc; |
0d07e240 JFM |
2066 | if (interface->bInterfaceNumber > 0) { |
2067 | PDEBUG(D_ERR, "intf != 0"); | |
63eb9546 | 2068 | return -ENODEV; |
0d07e240 | 2069 | } |
63eb9546 JFM |
2070 | |
2071 | /* create the device */ | |
2072 | if (dev_size < sizeof *gspca_dev) | |
2073 | dev_size = sizeof *gspca_dev; | |
2074 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2075 | if (!gspca_dev) { |
63eb9546 | 2076 | err("couldn't kzalloc gspca struct"); |
e293e599 | 2077 | return -ENOMEM; |
63eb9546 | 2078 | } |
8295d99e JFM |
2079 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2080 | if (!gspca_dev->usb_buf) { | |
2081 | err("out of memory"); | |
e293e599 | 2082 | ret = -ENOMEM; |
8295d99e JFM |
2083 | goto out; |
2084 | } | |
63eb9546 JFM |
2085 | gspca_dev->dev = dev; |
2086 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 2087 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 | 2088 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2089 | gspca_dev->nbufread = 2; |
ff374747 | 2090 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 2091 | |
012d6b02 | 2092 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2093 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2094 | if (ret < 0) |
2095 | goto out; | |
ba38ee8e | 2096 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
2097 | if (ret < 0) |
2098 | goto out; | |
2099 | gspca_set_default_mode(gspca_dev); | |
2100 | ||
2101 | mutex_init(&gspca_dev->usb_lock); | |
2102 | mutex_init(&gspca_dev->read_lock); | |
2103 | mutex_init(&gspca_dev->queue_lock); | |
2104 | init_waitqueue_head(&gspca_dev->wq); | |
2105 | ||
2106 | /* init video stuff */ | |
ba38ee8e | 2107 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
24441631 | 2108 | gspca_dev->vdev.parent = &intf->dev; |
5c4fa002 | 2109 | gspca_dev->module = module; |
ee56a4d3 | 2110 | gspca_dev->present = 1; |
a12ca6a6 | 2111 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2112 | VFL_TYPE_GRABBER, |
8d584a53 | 2113 | -1); |
63eb9546 JFM |
2114 | if (ret < 0) { |
2115 | err("video_register_device err %d", ret); | |
2116 | goto out; | |
2117 | } | |
2118 | ||
63eb9546 | 2119 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2120 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
63eb9546 JFM |
2121 | return 0; |
2122 | out: | |
e07a1d8a JFM |
2123 | kfree(gspca_dev->usb_buf); |
2124 | kfree(gspca_dev); | |
63eb9546 JFM |
2125 | return ret; |
2126 | } | |
2127 | EXPORT_SYMBOL(gspca_dev_probe); | |
2128 | ||
2129 | /* | |
2130 | * USB disconnection | |
2131 | * | |
2132 | * This function must be called by the sub-driver | |
2133 | * when the device disconnects, after the specific resources are freed. | |
2134 | */ | |
2135 | void gspca_disconnect(struct usb_interface *intf) | |
2136 | { | |
4aa0d037 | 2137 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 2138 | |
38c7c036 LP |
2139 | PDEBUG(D_PROBE, "%s disconnect", |
2140 | video_device_node_name(&gspca_dev->vdev)); | |
ad28127d | 2141 | mutex_lock(&gspca_dev->usb_lock); |
6e4ae872 | 2142 | gspca_dev->present = 0; |
6e4ae872 | 2143 | |
090264e5 JFM |
2144 | if (gspca_dev->streaming) { |
2145 | destroy_urbs(gspca_dev); | |
2146 | wake_up_interruptible(&gspca_dev->wq); | |
2147 | } | |
2148 | ||
2149 | /* the device is freed at exit of this function */ | |
ad28127d | 2150 | gspca_dev->dev = NULL; |
090264e5 JFM |
2151 | mutex_unlock(&gspca_dev->usb_lock); |
2152 | ||
6b060ffe FZ |
2153 | usb_set_intfdata(intf, NULL); |
2154 | ||
a12ca6a6 JFM |
2155 | /* release the device */ |
2156 | /* (this will call gspca_release() immediatly or on last close) */ | |
2157 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 2158 | |
0d07e240 | 2159 | /* PDEBUG(D_PROBE, "disconnect complete"); */ |
63eb9546 JFM |
2160 | } |
2161 | EXPORT_SYMBOL(gspca_disconnect); | |
2162 | ||
6a709749 JFM |
2163 | #ifdef CONFIG_PM |
2164 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2165 | { | |
2166 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2167 | ||
2168 | if (!gspca_dev->streaming) | |
2169 | return 0; | |
2170 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2171 | if (gspca_dev->sd_desc->stopN) |
2172 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
2173 | destroy_urbs(gspca_dev); |
2174 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
2175 | if (gspca_dev->sd_desc->stop0) |
2176 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2177 | return 0; |
2178 | } | |
2179 | EXPORT_SYMBOL(gspca_suspend); | |
2180 | ||
2181 | int gspca_resume(struct usb_interface *intf) | |
2182 | { | |
2183 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2184 | ||
2185 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
2186 | gspca_dev->sd_desc->init(gspca_dev); |
2187 | if (gspca_dev->streaming) | |
2188 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2189 | return 0; |
6a709749 JFM |
2190 | } |
2191 | EXPORT_SYMBOL(gspca_resume); | |
2192 | #endif | |
dcef3237 HG |
2193 | /* -- cam driver utility functions -- */ |
2194 | ||
2195 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2196 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2197 | ||
2198 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2199 | where changed. */ | |
2200 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2201 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2202 | { | |
2203 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2204 | const struct ctrl *gain_ctrl = NULL; | |
2205 | const struct ctrl *exposure_ctrl = NULL; | |
2206 | const struct ctrl *autogain_ctrl = NULL; | |
2207 | int retval = 0; | |
2208 | ||
2209 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
2210 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
2211 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2212 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2213 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2214 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2215 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2216 | } | |
2217 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2218 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2219 | "on cam without (auto)gain/exposure"); | |
2220 | return 0; | |
2221 | } | |
2222 | ||
2223 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2224 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2225 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2226 | return 0; | |
2227 | ||
2228 | orig_gain = gain; | |
2229 | orig_exposure = exposure; | |
2230 | ||
2231 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2232 | desired lumination fast (with the risc of a slight overshoot) */ | |
2233 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2234 | ||
1c44d81d | 2235 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2236 | avg_lum, desired_avg_lum, steps); |
2237 | ||
2238 | for (i = 0; i < steps; i++) { | |
2239 | if (avg_lum > desired_avg_lum) { | |
2240 | if (gain > gain_knee) | |
2241 | gain--; | |
2242 | else if (exposure > exposure_knee) | |
2243 | exposure--; | |
2244 | else if (gain > gain_ctrl->qctrl.default_value) | |
2245 | gain--; | |
2246 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2247 | exposure--; | |
2248 | else if (gain > gain_ctrl->qctrl.minimum) | |
2249 | gain--; | |
2250 | else | |
2251 | break; | |
2252 | } else { | |
2253 | if (gain < gain_ctrl->qctrl.default_value) | |
2254 | gain++; | |
2255 | else if (exposure < exposure_knee) | |
2256 | exposure++; | |
2257 | else if (gain < gain_knee) | |
2258 | gain++; | |
2259 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2260 | exposure++; | |
2261 | else if (gain < gain_ctrl->qctrl.maximum) | |
2262 | gain++; | |
2263 | else | |
2264 | break; | |
2265 | } | |
2266 | } | |
2267 | ||
2268 | if (gain != orig_gain) { | |
2269 | gain_ctrl->set(gspca_dev, gain); | |
2270 | retval = 1; | |
2271 | } | |
2272 | if (exposure != orig_exposure) { | |
2273 | exposure_ctrl->set(gspca_dev, exposure); | |
2274 | retval = 1; | |
2275 | } | |
2276 | ||
2277 | return retval; | |
2278 | } | |
2279 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2280 | ||
63eb9546 JFM |
2281 | /* -- module insert / remove -- */ |
2282 | static int __init gspca_init(void) | |
2283 | { | |
bb64e86c JFM |
2284 | info("main v%d.%d.%d registered", |
2285 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2286 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2287 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2288 | return 0; |
2289 | } | |
2290 | static void __exit gspca_exit(void) | |
2291 | { | |
2292 | info("main deregistered"); | |
2293 | } | |
2294 | ||
2295 | module_init(gspca_init); | |
2296 | module_exit(gspca_exit); | |
2297 | ||
335b3f88 | 2298 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2299 | module_param_named(debug, gspca_debug, int, 0644); |
2300 | MODULE_PARM_DESC(debug, | |
2301 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2302 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2303 | " 0x0100: v4l2"); | |
6a7eba24 | 2304 | #endif |