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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
27c6f9e5 | 4 | * Copyright (C) 2008-2010 Jean-François Moine <http://moinejf.free.fr> |
63eb9546 | 5 | * |
0274d42e MN |
6 | * Camera button input handling by Márton Németh |
7 | * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> | |
8 | * | |
63eb9546 JFM |
9 | * This program is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | * for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software Foundation, | |
21 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #define MODULE_NAME "gspca" | |
25 | ||
26 | #include <linux/init.h> | |
cf0fe08d | 27 | #include <linux/version.h> |
63eb9546 JFM |
28 | #include <linux/fs.h> |
29 | #include <linux/vmalloc.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/pagemap.h> | |
956e42d2 | 35 | #include <linux/io.h> |
63eb9546 | 36 | #include <asm/page.h> |
956e42d2 | 37 | #include <linux/uaccess.h> |
2f51d00f | 38 | #include <linux/ktime.h> |
35ea11ff | 39 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
40 | |
41 | #include "gspca.h" | |
42 | ||
f7628015 | 43 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
44 | #include <linux/input.h> |
45 | #include <linux/usb/input.h> | |
e070bf9e | 46 | #endif |
0274d42e | 47 | |
d43fa32f | 48 | /* global values */ |
8fee8453 JFM |
49 | #define DEF_NURBS 3 /* default number of URBs */ |
50 | #if DEF_NURBS > MAX_NURBS | |
51 | #error "DEF_NURBS too big" | |
52 | #endif | |
d43fa32f | 53 | |
27c6f9e5 | 54 | MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); |
63eb9546 JFM |
55 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); |
56 | MODULE_LICENSE("GPL"); | |
57 | ||
0beb6714 | 58 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 12, 0) |
63eb9546 | 59 | |
335b3f88 | 60 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
61 | int gspca_debug = D_ERR | D_PROBE; |
62 | EXPORT_SYMBOL(gspca_debug); | |
63 | ||
64 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
65 | { | |
66 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
67 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
68 | txt, | |
69 | pixfmt & 0xff, | |
70 | (pixfmt >> 8) & 0xff, | |
71 | (pixfmt >> 16) & 0xff, | |
72 | pixfmt >> 24, | |
73 | w, h); | |
74 | } else { | |
75 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
76 | txt, | |
77 | pixfmt, | |
78 | w, h); | |
79 | } | |
80 | } | |
81 | #else | |
82 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
83 | #endif | |
84 | ||
77ee3318 | 85 | /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
d43fa32f JFM |
86 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ |
87 | #define GSPCA_MEMORY_READ 7 | |
88 | ||
d43fa32f | 89 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 90 | |
63eb9546 JFM |
91 | /* |
92 | * VMA operations. | |
93 | */ | |
94 | static void gspca_vm_open(struct vm_area_struct *vma) | |
95 | { | |
96 | struct gspca_frame *frame = vma->vm_private_data; | |
97 | ||
98 | frame->vma_use_count++; | |
99 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
100 | } | |
101 | ||
102 | static void gspca_vm_close(struct vm_area_struct *vma) | |
103 | { | |
104 | struct gspca_frame *frame = vma->vm_private_data; | |
105 | ||
106 | if (--frame->vma_use_count <= 0) | |
107 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
108 | } | |
109 | ||
f0f37e2f | 110 | static const struct vm_operations_struct gspca_vm_ops = { |
63eb9546 JFM |
111 | .open = gspca_vm_open, |
112 | .close = gspca_vm_close, | |
113 | }; | |
114 | ||
0274d42e MN |
115 | /* |
116 | * Input and interrupt endpoint handling functions | |
117 | */ | |
f7628015 | 118 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
119 | static void int_irq(struct urb *urb) |
120 | { | |
121 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
122 | int ret; | |
123 | ||
124 | ret = urb->status; | |
125 | switch (ret) { | |
126 | case 0: | |
127 | if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, | |
128 | urb->transfer_buffer, urb->actual_length) < 0) { | |
129 | PDEBUG(D_ERR, "Unknown packet received"); | |
130 | } | |
131 | break; | |
132 | ||
133 | case -ENOENT: | |
134 | case -ECONNRESET: | |
135 | case -ENODEV: | |
136 | case -ESHUTDOWN: | |
137 | /* Stop is requested either by software or hardware is gone, | |
138 | * keep the ret value non-zero and don't resubmit later. | |
139 | */ | |
140 | break; | |
141 | ||
142 | default: | |
143 | PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status); | |
144 | urb->status = 0; | |
145 | ret = 0; | |
146 | } | |
147 | ||
148 | if (ret == 0) { | |
149 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
150 | if (ret < 0) | |
0b656321 | 151 | err("Resubmit URB failed with error %i", ret); |
0274d42e MN |
152 | } |
153 | } | |
154 | ||
155 | static int gspca_input_connect(struct gspca_dev *dev) | |
156 | { | |
157 | struct input_dev *input_dev; | |
158 | int err = 0; | |
159 | ||
160 | dev->input_dev = NULL; | |
ac82f59f | 161 | if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { |
0274d42e MN |
162 | input_dev = input_allocate_device(); |
163 | if (!input_dev) | |
164 | return -ENOMEM; | |
165 | ||
166 | usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); | |
167 | strlcat(dev->phys, "/input0", sizeof(dev->phys)); | |
168 | ||
169 | input_dev->name = dev->sd_desc->name; | |
170 | input_dev->phys = dev->phys; | |
171 | ||
172 | usb_to_input_id(dev->dev, &input_dev->id); | |
173 | ||
174 | input_dev->evbit[0] = BIT_MASK(EV_KEY); | |
175 | input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); | |
176 | input_dev->dev.parent = &dev->dev->dev; | |
177 | ||
178 | err = input_register_device(input_dev); | |
179 | if (err) { | |
0b656321 JFM |
180 | err("Input device registration failed with error %i", |
181 | err); | |
0274d42e MN |
182 | input_dev->dev.parent = NULL; |
183 | input_free_device(input_dev); | |
184 | } else { | |
185 | dev->input_dev = input_dev; | |
186 | } | |
10ee2402 | 187 | } |
0274d42e MN |
188 | |
189 | return err; | |
190 | } | |
191 | ||
192 | static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, | |
193 | struct usb_endpoint_descriptor *ep) | |
194 | { | |
195 | unsigned int buffer_len; | |
196 | int interval; | |
197 | struct urb *urb; | |
198 | struct usb_device *dev; | |
199 | void *buffer = NULL; | |
200 | int ret = -EINVAL; | |
201 | ||
b26d6e21 | 202 | buffer_len = le16_to_cpu(ep->wMaxPacketSize); |
0274d42e | 203 | interval = ep->bInterval; |
c4dc692c | 204 | PDEBUG(D_CONF, "found int in endpoint: 0x%x, " |
0274d42e MN |
205 | "buffer_len=%u, interval=%u", |
206 | ep->bEndpointAddress, buffer_len, interval); | |
207 | ||
208 | dev = gspca_dev->dev; | |
209 | ||
210 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
211 | if (!urb) { | |
212 | ret = -ENOMEM; | |
213 | goto error; | |
214 | } | |
215 | ||
7a9b1492 | 216 | buffer = usb_alloc_coherent(dev, buffer_len, |
0274d42e MN |
217 | GFP_KERNEL, &urb->transfer_dma); |
218 | if (!buffer) { | |
219 | ret = -ENOMEM; | |
220 | goto error_buffer; | |
221 | } | |
222 | usb_fill_int_urb(urb, dev, | |
223 | usb_rcvintpipe(dev, ep->bEndpointAddress), | |
224 | buffer, buffer_len, | |
225 | int_irq, (void *)gspca_dev, interval); | |
882787ff | 226 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
0274d42e MN |
227 | ret = usb_submit_urb(urb, GFP_KERNEL); |
228 | if (ret < 0) { | |
c4dc692c | 229 | PDEBUG(D_ERR, "submit int URB failed with error %i", ret); |
0274d42e MN |
230 | goto error_submit; |
231 | } | |
2661da47 | 232 | gspca_dev->int_urb = urb; |
0274d42e MN |
233 | return ret; |
234 | ||
235 | error_submit: | |
997ea58e DM |
236 | usb_free_coherent(dev, |
237 | urb->transfer_buffer_length, | |
238 | urb->transfer_buffer, | |
239 | urb->transfer_dma); | |
0274d42e MN |
240 | error_buffer: |
241 | usb_free_urb(urb); | |
242 | error: | |
243 | return ret; | |
244 | } | |
245 | ||
10ee2402 | 246 | static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
0274d42e | 247 | { |
0274d42e MN |
248 | struct usb_interface *intf; |
249 | struct usb_host_interface *intf_desc; | |
250 | struct usb_endpoint_descriptor *ep; | |
251 | int i; | |
252 | ||
253 | if (gspca_dev->sd_desc->int_pkt_scan) { | |
254 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
255 | intf_desc = intf->cur_altsetting; | |
256 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
257 | ep = &intf_desc->endpoint[i].desc; | |
258 | if (usb_endpoint_dir_in(ep) && | |
259 | usb_endpoint_xfer_int(ep)) { | |
260 | ||
10ee2402 | 261 | alloc_and_submit_int_urb(gspca_dev, ep); |
0274d42e MN |
262 | break; |
263 | } | |
264 | } | |
265 | } | |
0274d42e MN |
266 | } |
267 | ||
268 | static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
269 | { | |
270 | struct urb *urb; | |
271 | ||
272 | urb = gspca_dev->int_urb; | |
273 | if (urb) { | |
274 | gspca_dev->int_urb = NULL; | |
275 | usb_kill_urb(urb); | |
997ea58e DM |
276 | usb_free_coherent(gspca_dev->dev, |
277 | urb->transfer_buffer_length, | |
278 | urb->transfer_buffer, | |
279 | urb->transfer_dma); | |
0274d42e MN |
280 | usb_free_urb(urb); |
281 | } | |
282 | } | |
f7628015 RD |
283 | #else |
284 | static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
285 | { | |
286 | } | |
287 | ||
288 | static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) | |
289 | { | |
290 | } | |
291 | ||
292 | static inline int gspca_input_connect(struct gspca_dev *dev) | |
293 | { | |
294 | return 0; | |
295 | } | |
0274d42e MN |
296 | #endif |
297 | ||
63eb9546 | 298 | /* |
d43fa32f | 299 | * fill a video frame from an URB and resubmit |
63eb9546 | 300 | */ |
d43fa32f JFM |
301 | static void fill_frame(struct gspca_dev *gspca_dev, |
302 | struct urb *urb) | |
63eb9546 | 303 | { |
8d584a53 | 304 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 305 | int i, len, st; |
63eb9546 JFM |
306 | cam_pkt_op pkt_scan; |
307 | ||
6a7eba24 | 308 | if (urb->status != 0) { |
090264e5 JFM |
309 | if (urb->status == -ESHUTDOWN) |
310 | return; /* disconnection */ | |
62ee8eee | 311 | #ifdef CONFIG_PM |
6a540bdf HG |
312 | if (gspca_dev->frozen) |
313 | return; | |
62ee8eee | 314 | #endif |
6a540bdf | 315 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 316 | urb->status = 0; |
bf926adf | 317 | goto resubmit; |
6a7eba24 | 318 | } |
63eb9546 JFM |
319 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
320 | for (i = 0; i < urb->number_of_packets; i++) { | |
95f18be2 | 321 | len = urb->iso_frame_desc[i].actual_length; |
63eb9546 | 322 | |
63eb9546 | 323 | /* check the packet status and length */ |
63eb9546 JFM |
324 | st = urb->iso_frame_desc[i].status; |
325 | if (st) { | |
0b656321 | 326 | err("ISOC data error: [%d] len=%d, status=%d", |
63eb9546 JFM |
327 | i, len, st); |
328 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
329 | continue; | |
330 | } | |
76ebc16b JFM |
331 | if (len == 0) { |
332 | if (gspca_dev->empty_packet == 0) | |
333 | gspca_dev->empty_packet = 1; | |
334 | continue; | |
335 | } | |
63eb9546 JFM |
336 | |
337 | /* let the packet be analyzed by the subdriver */ | |
338 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
339 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 340 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 341 | + urb->iso_frame_desc[i].offset; |
76dd272b | 342 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
343 | } |
344 | ||
bf926adf | 345 | resubmit: |
63eb9546 | 346 | /* resubmit the URB */ |
63eb9546 JFM |
347 | st = usb_submit_urb(urb, GFP_ATOMIC); |
348 | if (st < 0) | |
0b656321 | 349 | err("usb_submit_urb() ret %d", st); |
63eb9546 JFM |
350 | } |
351 | ||
d43fa32f JFM |
352 | /* |
353 | * ISOC message interrupt from the USB device | |
354 | * | |
ac0d6df6 | 355 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 356 | */ |
8d584a53 | 357 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
358 | { |
359 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
360 | ||
3647fea8 | 361 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
362 | if (!gspca_dev->streaming) |
363 | return; | |
364 | fill_frame(gspca_dev, urb); | |
365 | } | |
366 | ||
0be01004 JFM |
367 | /* |
368 | * bulk message interrupt from the USB device | |
369 | */ | |
8d584a53 | 370 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
371 | { |
372 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 373 | int st; |
0be01004 JFM |
374 | |
375 | PDEBUG(D_PACK, "bulk irq"); | |
376 | if (!gspca_dev->streaming) | |
377 | return; | |
880ae24d JFM |
378 | switch (urb->status) { |
379 | case 0: | |
380 | break; | |
090264e5 JFM |
381 | case -ESHUTDOWN: |
382 | return; /* disconnection */ | |
880ae24d | 383 | default: |
0be01004 | 384 | #ifdef CONFIG_PM |
6a540bdf HG |
385 | if (gspca_dev->frozen) |
386 | return; | |
0be01004 | 387 | #endif |
6a540bdf | 388 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 389 | urb->status = 0; |
bf926adf | 390 | goto resubmit; |
0be01004 JFM |
391 | } |
392 | ||
d131c3c9 JFM |
393 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
394 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
395 | urb->transfer_buffer, |
396 | urb->actual_length); | |
dff369aa | 397 | |
bf926adf | 398 | resubmit: |
dff369aa AO |
399 | /* resubmit the URB */ |
400 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
401 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
402 | if (st < 0) | |
0b656321 | 403 | err("usb_submit_urb() ret %d", st); |
dff369aa | 404 | } |
0be01004 JFM |
405 | } |
406 | ||
63eb9546 JFM |
407 | /* |
408 | * add data to the current frame | |
409 | * | |
ac0d6df6 JFM |
410 | * This function is called by the subdrivers at interrupt level. |
411 | * | |
63eb9546 JFM |
412 | * To build a frame, these ones must add |
413 | * - one FIRST_PACKET | |
414 | * - 0 or many INTER_PACKETs | |
415 | * - one LAST_PACKET | |
416 | * DISCARD_PACKET invalidates the whole frame. | |
417 | * On LAST_PACKET, a new frame is returned. | |
418 | */ | |
76dd272b JFM |
419 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
420 | enum gspca_packet_type packet_type, | |
421 | const u8 *data, | |
422 | int len) | |
63eb9546 | 423 | { |
3ec342f2 | 424 | struct gspca_frame *frame; |
63eb9546 JFM |
425 | int i, j; |
426 | ||
e2997a72 | 427 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 | 428 | |
63eb9546 | 429 | if (packet_type == FIRST_PACKET) { |
f7059eaa JFM |
430 | i = atomic_read(&gspca_dev->fr_i); |
431 | ||
432 | /* if there are no queued buffer, discard the whole frame */ | |
433 | if (i == atomic_read(&gspca_dev->fr_q)) { | |
434 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
2e0544a8 | 435 | gspca_dev->sequence++; |
f7059eaa JFM |
436 | return; |
437 | } | |
b192ca98 JFM |
438 | j = gspca_dev->fr_queue[i]; |
439 | frame = &gspca_dev->frame[j]; | |
2f51d00f | 440 | frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get()); |
2e0544a8 | 441 | frame->v4l2_buf.sequence = gspca_dev->sequence++; |
f7059eaa | 442 | gspca_dev->image = frame->data; |
b192ca98 | 443 | gspca_dev->image_len = 0; |
fe988f56 JFM |
444 | } else { |
445 | switch (gspca_dev->last_packet_type) { | |
446 | case DISCARD_PACKET: | |
447 | if (packet_type == LAST_PACKET) | |
448 | gspca_dev->last_packet_type = packet_type; | |
449 | return; | |
450 | case LAST_PACKET: | |
451 | return; | |
452 | } | |
d43fa32f | 453 | } |
63eb9546 | 454 | |
d43fa32f | 455 | /* append the packet to the frame buffer */ |
63eb9546 | 456 | if (len > 0) { |
b192ca98 JFM |
457 | if (gspca_dev->image_len + len > gspca_dev->frsz) { |
458 | PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d", | |
459 | gspca_dev->image_len + len, | |
460 | gspca_dev->frsz); | |
63eb9546 JFM |
461 | packet_type = DISCARD_PACKET; |
462 | } else { | |
fe988f56 JFM |
463 | /* !! image is NULL only when last pkt is LAST or DISCARD |
464 | if (gspca_dev->image == NULL) { | |
465 | err("gspca_frame_add() image == NULL"); | |
466 | return; | |
467 | } | |
468 | */ | |
b192ca98 JFM |
469 | memcpy(gspca_dev->image + gspca_dev->image_len, |
470 | data, len); | |
471 | gspca_dev->image_len += len; | |
63eb9546 JFM |
472 | } |
473 | } | |
474 | gspca_dev->last_packet_type = packet_type; | |
475 | ||
f7059eaa JFM |
476 | /* if last packet, invalidate packet concatenation until |
477 | * next first packet, wake up the application and advance | |
478 | * in the queue */ | |
63eb9546 | 479 | if (packet_type == LAST_PACKET) { |
f7059eaa | 480 | i = atomic_read(&gspca_dev->fr_i); |
b192ca98 JFM |
481 | j = gspca_dev->fr_queue[i]; |
482 | frame = &gspca_dev->frame[j]; | |
483 | frame->v4l2_buf.bytesused = gspca_dev->image_len; | |
02bbcb9d JFM |
484 | frame->v4l2_buf.flags = (frame->v4l2_buf.flags |
485 | | V4L2_BUF_FLAG_DONE) | |
486 | & ~V4L2_BUF_FLAG_QUEUED; | |
f7059eaa JFM |
487 | i = (i + 1) % GSPCA_MAX_FRAMES; |
488 | atomic_set(&gspca_dev->fr_i, i); | |
63eb9546 | 489 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
f7059eaa JFM |
490 | PDEBUG(D_FRAM, "frame complete len:%d", |
491 | frame->v4l2_buf.bytesused); | |
492 | gspca_dev->image = NULL; | |
493 | gspca_dev->image_len = 0; | |
63eb9546 | 494 | } |
63eb9546 JFM |
495 | } |
496 | EXPORT_SYMBOL(gspca_frame_add); | |
497 | ||
498 | static int gspca_is_compressed(__u32 format) | |
499 | { | |
500 | switch (format) { | |
501 | case V4L2_PIX_FMT_MJPEG: | |
502 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 503 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 504 | case V4L2_PIX_FMT_PAC207: |
d661e622 | 505 | case V4L2_PIX_FMT_MR97310A: |
63eb9546 JFM |
506 | return 1; |
507 | } | |
508 | return 0; | |
509 | } | |
510 | ||
d642de2e HG |
511 | static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file, |
512 | enum v4l2_memory memory, unsigned int count) | |
63eb9546 | 513 | { |
d43fa32f JFM |
514 | struct gspca_frame *frame; |
515 | unsigned int frsz; | |
516 | int i; | |
63eb9546 | 517 | |
c2446b3e JFM |
518 | i = gspca_dev->curr_mode; |
519 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 520 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 521 | frsz = PAGE_ALIGN(frsz); |
f7059eaa JFM |
522 | if (count >= GSPCA_MAX_FRAMES) |
523 | count = GSPCA_MAX_FRAMES - 1; | |
e795d912 | 524 | gspca_dev->frbuf = vmalloc_32(frsz * count); |
ac0d6df6 JFM |
525 | if (!gspca_dev->frbuf) { |
526 | err("frame alloc failed"); | |
527 | return -ENOMEM; | |
63eb9546 | 528 | } |
d642de2e HG |
529 | gspca_dev->capt_file = file; |
530 | gspca_dev->memory = memory; | |
531 | gspca_dev->frsz = frsz; | |
63eb9546 JFM |
532 | gspca_dev->nframes = count; |
533 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
534 | frame = &gspca_dev->frame[i]; |
535 | frame->v4l2_buf.index = i; | |
536 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
537 | frame->v4l2_buf.flags = 0; | |
538 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
539 | frame->v4l2_buf.length = frsz; | |
d642de2e | 540 | frame->v4l2_buf.memory = memory; |
d43fa32f | 541 | frame->v4l2_buf.sequence = 0; |
b192ca98 | 542 | frame->data = gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 543 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 | 544 | } |
f7059eaa JFM |
545 | atomic_set(&gspca_dev->fr_q, 0); |
546 | atomic_set(&gspca_dev->fr_i, 0); | |
547 | gspca_dev->fr_o = 0; | |
d43fa32f | 548 | return 0; |
63eb9546 JFM |
549 | } |
550 | ||
551 | static void frame_free(struct gspca_dev *gspca_dev) | |
552 | { | |
553 | int i; | |
554 | ||
555 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 556 | if (gspca_dev->frbuf != NULL) { |
e795d912 | 557 | vfree(gspca_dev->frbuf); |
63eb9546 JFM |
558 | gspca_dev->frbuf = NULL; |
559 | for (i = 0; i < gspca_dev->nframes; i++) | |
560 | gspca_dev->frame[i].data = NULL; | |
561 | } | |
562 | gspca_dev->nframes = 0; | |
d642de2e HG |
563 | gspca_dev->frsz = 0; |
564 | gspca_dev->capt_file = NULL; | |
565 | gspca_dev->memory = GSPCA_MEMORY_NO; | |
63eb9546 JFM |
566 | } |
567 | ||
d43fa32f | 568 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
569 | { |
570 | struct urb *urb; | |
571 | unsigned int i; | |
572 | ||
573 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 574 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 575 | urb = gspca_dev->urb[i]; |
63eb9546 | 576 | if (urb == NULL) |
d43fa32f | 577 | break; |
63eb9546 | 578 | |
4aa0d037 | 579 | gspca_dev->urb[i] = NULL; |
090264e5 | 580 | usb_kill_urb(urb); |
efab8211 | 581 | if (urb->transfer_buffer != NULL) |
997ea58e DM |
582 | usb_free_coherent(gspca_dev->dev, |
583 | urb->transfer_buffer_length, | |
584 | urb->transfer_buffer, | |
585 | urb->transfer_dma); | |
63eb9546 JFM |
586 | usb_free_urb(urb); |
587 | } | |
63eb9546 JFM |
588 | } |
589 | ||
e4dac289 JFM |
590 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
591 | { | |
592 | int ret; | |
593 | ||
594 | if (gspca_dev->alt == 0) | |
595 | return 0; | |
596 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
597 | if (ret < 0) | |
0b656321 | 598 | err("set alt 0 err %d", ret); |
e4dac289 JFM |
599 | return ret; |
600 | } | |
601 | ||
602 | /* Note: both the queue and the usb locks should be held when calling this */ | |
603 | static void gspca_stream_off(struct gspca_dev *gspca_dev) | |
604 | { | |
605 | gspca_dev->streaming = 0; | |
606 | if (gspca_dev->present) { | |
607 | if (gspca_dev->sd_desc->stopN) | |
608 | gspca_dev->sd_desc->stopN(gspca_dev); | |
609 | destroy_urbs(gspca_dev); | |
610 | gspca_input_destroy_urb(gspca_dev); | |
611 | gspca_set_alt0(gspca_dev); | |
612 | gspca_input_create_urb(gspca_dev); | |
613 | } | |
614 | ||
615 | /* always call stop0 to free the subdriver's resources */ | |
616 | if (gspca_dev->sd_desc->stop0) | |
617 | gspca_dev->sd_desc->stop0(gspca_dev); | |
618 | PDEBUG(D_STREAM, "stream off OK"); | |
619 | } | |
620 | ||
63eb9546 | 621 | /* |
219423c1 | 622 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 623 | */ |
0be01004 | 624 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
6929dc6b | 625 | int xfer) |
63eb9546 JFM |
626 | { |
627 | struct usb_host_endpoint *ep; | |
628 | int i, attr; | |
629 | ||
63eb9546 JFM |
630 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
631 | ep = &alt->endpoint[i]; | |
50e06dee | 632 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 JFM |
633 | if (attr == xfer |
634 | && ep->desc.wMaxPacketSize != 0) | |
50e06dee | 635 | return ep; |
63eb9546 JFM |
636 | } |
637 | return NULL; | |
638 | } | |
639 | ||
640 | /* | |
219423c1 | 641 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
642 | * |
643 | * The endpoint is defined by the subdriver. | |
644 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
645 | * This routine may be called many times when the bandwidth is too small | |
646 | * (the bandwidth is checked on urb submit). | |
647 | */ | |
0be01004 | 648 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
649 | { |
650 | struct usb_interface *intf; | |
651 | struct usb_host_endpoint *ep; | |
6929dc6b | 652 | int xfer, i, ret; |
63eb9546 JFM |
653 | |
654 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 655 | ep = NULL; |
6929dc6b JFM |
656 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
657 | : USB_ENDPOINT_XFER_ISOC; | |
63eb9546 | 658 | i = gspca_dev->alt; /* previous alt setting */ |
a511ba94 HG |
659 | if (gspca_dev->cam.reverse_alts) { |
660 | while (++i < gspca_dev->nbalt) { | |
661 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
662 | if (ep) | |
663 | break; | |
664 | } | |
665 | } else { | |
666 | while (--i >= 0) { | |
667 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
668 | if (ep) | |
669 | break; | |
670 | } | |
63eb9546 | 671 | } |
6a7eba24 | 672 | if (ep == NULL) { |
6929dc6b JFM |
673 | err("no transfer endpoint found"); |
674 | return NULL; | |
63eb9546 | 675 | } |
0be01004 | 676 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 677 | i, ep->desc.bEndpointAddress); |
1c8336d3 | 678 | gspca_dev->alt = i; /* memorize the current alt setting */ |
8dd07ef1 | 679 | if (gspca_dev->nbalt > 1) { |
95d9142c JFM |
680 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); |
681 | if (ret < 0) { | |
6929dc6b | 682 | err("set alt %d err %d", i, ret); |
0274d42e | 683 | ep = NULL; |
95d9142c | 684 | } |
63eb9546 | 685 | } |
63eb9546 JFM |
686 | return ep; |
687 | } | |
688 | ||
689 | /* | |
0be01004 | 690 | * create the URBs for image transfer |
63eb9546 JFM |
691 | */ |
692 | static int create_urbs(struct gspca_dev *gspca_dev, | |
693 | struct usb_host_endpoint *ep) | |
694 | { | |
695 | struct urb *urb; | |
d43fa32f | 696 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
697 | |
698 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 699 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 700 | |
6929dc6b | 701 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
702 | |
703 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
704 | if (gspca_dev->pkt_size == 0) |
705 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
706 | else | |
707 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
708 | npkt = gspca_dev->cam.npkt; |
709 | if (npkt == 0) | |
710 | npkt = 32; /* default value */ | |
0be01004 JFM |
711 | bsize = psize * npkt; |
712 | PDEBUG(D_STREAM, | |
713 | "isoc %d pkts size %d = bsize:%d", | |
714 | npkt, psize, bsize); | |
51977a8d | 715 | nurbs = DEF_NURBS; |
95d9142c | 716 | } else { /* bulk */ |
0be01004 | 717 | npkt = 0; |
dff369aa | 718 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
719 | if (bsize == 0) |
720 | bsize = psize; | |
0be01004 | 721 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
722 | if (gspca_dev->cam.bulk_nurbs != 0) |
723 | nurbs = gspca_dev->cam.bulk_nurbs; | |
724 | else | |
725 | nurbs = 1; | |
0be01004 JFM |
726 | } |
727 | ||
d43fa32f | 728 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
729 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
730 | if (!urb) { | |
731 | err("usb_alloc_urb failed"); | |
732 | return -ENOMEM; | |
733 | } | |
db870875 | 734 | gspca_dev->urb[n] = urb; |
997ea58e | 735 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
63eb9546 JFM |
736 | bsize, |
737 | GFP_KERNEL, | |
738 | &urb->transfer_dma); | |
739 | ||
4aa0d037 | 740 | if (urb->transfer_buffer == NULL) { |
997ea58e | 741 | err("usb_alloc_coherent failed"); |
63eb9546 JFM |
742 | return -ENOMEM; |
743 | } | |
63eb9546 JFM |
744 | urb->dev = gspca_dev->dev; |
745 | urb->context = gspca_dev; | |
63eb9546 | 746 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
747 | if (npkt != 0) { /* ISOC */ |
748 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
749 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
750 | urb->transfer_flags = URB_ISO_ASAP |
751 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
752 | urb->interval = ep->desc.bInterval; |
753 | urb->complete = isoc_irq; | |
754 | urb->number_of_packets = npkt; | |
755 | for (i = 0; i < npkt; i++) { | |
756 | urb->iso_frame_desc[i].length = psize; | |
757 | urb->iso_frame_desc[i].offset = psize * i; | |
758 | } | |
759 | } else { /* bulk */ | |
760 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
a23c1947 | 761 | ep->desc.bEndpointAddress); |
6c49da7f | 762 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 763 | urb->complete = bulk_irq; |
63eb9546 JFM |
764 | } |
765 | } | |
766 | return 0; | |
767 | } | |
768 | ||
769 | /* | |
770 | * start the USB transfer | |
771 | */ | |
772 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
773 | { | |
63eb9546 | 774 | struct usb_host_endpoint *ep; |
db870875 | 775 | struct urb *urb; |
63eb9546 JFM |
776 | int n, ret; |
777 | ||
e2997a72 HG |
778 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
779 | return -ERESTARTSYS; | |
63eb9546 | 780 | |
090264e5 JFM |
781 | if (!gspca_dev->present) { |
782 | ret = -ENODEV; | |
314b3e08 | 783 | goto unlock; |
090264e5 JFM |
784 | } |
785 | ||
f7059eaa JFM |
786 | /* reset the streaming variables */ |
787 | gspca_dev->image = NULL; | |
788 | gspca_dev->image_len = 0; | |
789 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
790 | gspca_dev->sequence = 0; | |
791 | ||
ab6c8cf2 JFM |
792 | gspca_dev->usb_err = 0; |
793 | ||
d43fa32f JFM |
794 | /* set the higher alternate setting and |
795 | * loop until urb submit succeeds */ | |
a511ba94 HG |
796 | if (gspca_dev->cam.reverse_alts) |
797 | gspca_dev->alt = 0; | |
798 | else | |
799 | gspca_dev->alt = gspca_dev->nbalt; | |
800 | ||
1f53b0b0 JFM |
801 | if (gspca_dev->sd_desc->isoc_init) { |
802 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
803 | if (ret < 0) | |
314b3e08 | 804 | goto unlock; |
1f53b0b0 | 805 | } |
314b3e08 HG |
806 | |
807 | gspca_input_destroy_urb(gspca_dev); | |
1f53b0b0 JFM |
808 | ep = get_ep(gspca_dev); |
809 | if (ep == NULL) { | |
810 | ret = -EIO; | |
811 | goto out; | |
812 | } | |
63eb9546 | 813 | for (;;) { |
47aaca96 JFM |
814 | if (!gspca_dev->cam.no_urb_create) { |
815 | PDEBUG(D_STREAM, "init transfer alt %d", | |
816 | gspca_dev->alt); | |
817 | ret = create_urbs(gspca_dev, ep); | |
818 | if (ret < 0) { | |
819 | destroy_urbs(gspca_dev); | |
820 | goto out; | |
821 | } | |
db870875 | 822 | } |
63eb9546 | 823 | |
8fe2f1d5 | 824 | /* clear the bulk endpoint */ |
6929dc6b | 825 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 826 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 827 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 828 | |
63eb9546 | 829 | /* start the cam */ |
72ab97ce JFM |
830 | ret = gspca_dev->sd_desc->start(gspca_dev); |
831 | if (ret < 0) { | |
832 | destroy_urbs(gspca_dev); | |
833 | goto out; | |
834 | } | |
63eb9546 | 835 | gspca_dev->streaming = 1; |
63eb9546 | 836 | |
dff369aa | 837 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 838 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
839 | break; |
840 | ||
63eb9546 | 841 | /* submit the URBs */ |
db870875 JFM |
842 | for (n = 0; n < MAX_NURBS; n++) { |
843 | urb = gspca_dev->urb[n]; | |
844 | if (urb == NULL) | |
845 | break; | |
846 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
847 | if (ret < 0) |
848 | break; | |
63eb9546 JFM |
849 | } |
850 | if (ret >= 0) | |
851 | break; | |
e4dac289 | 852 | gspca_stream_off(gspca_dev); |
4bdf4a83 | 853 | if (ret != -ENOSPC) { |
0b656321 | 854 | err("usb_submit_urb alt %d err %d", |
4bdf4a83 | 855 | gspca_dev->alt, ret); |
1f53b0b0 | 856 | goto out; |
4bdf4a83 | 857 | } |
1f53b0b0 JFM |
858 | |
859 | /* the bandwidth is not wide enough | |
860 | * negociate or try a lower alternate setting */ | |
4bdf4a83 JFM |
861 | PDEBUG(D_ERR|D_STREAM, |
862 | "bandwidth not wide enough - trying again"); | |
1f53b0b0 JFM |
863 | msleep(20); /* wait for kill complete */ |
864 | if (gspca_dev->sd_desc->isoc_nego) { | |
865 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
866 | if (ret < 0) | |
867 | goto out; | |
868 | } else { | |
869 | ep = get_ep(gspca_dev); | |
870 | if (ep == NULL) { | |
871 | ret = -EIO; | |
872 | goto out; | |
873 | } | |
874 | } | |
63eb9546 JFM |
875 | } |
876 | out: | |
314b3e08 HG |
877 | gspca_input_create_urb(gspca_dev); |
878 | unlock: | |
63eb9546 JFM |
879 | mutex_unlock(&gspca_dev->usb_lock); |
880 | return ret; | |
881 | } | |
882 | ||
d43fa32f | 883 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 | 884 | { |
6a33091f | 885 | struct gspca_ctrl *ctrl; |
63eb9546 JFM |
886 | int i; |
887 | ||
888 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
889 | gspca_dev->curr_mode = i; | |
890 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
891 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 892 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
6a33091f JFM |
893 | |
894 | /* set the current control values to their default values | |
895 | * which may have changed in sd_init() */ | |
896 | ctrl = gspca_dev->cam.ctrls; | |
897 | if (ctrl != NULL) { | |
898 | for (i = 0; | |
899 | i < gspca_dev->sd_desc->nctrls; | |
900 | i++, ctrl++) | |
901 | ctrl->val = ctrl->def; | |
902 | } | |
63eb9546 JFM |
903 | } |
904 | ||
905 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
906 | int width, int height) | |
907 | { | |
908 | int i; | |
909 | ||
d43fa32f JFM |
910 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
911 | if (width >= gspca_dev->cam.cam_mode[i].width | |
912 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
913 | break; |
914 | } | |
63eb9546 JFM |
915 | return i; |
916 | } | |
917 | ||
63eb9546 JFM |
918 | /* |
919 | * search a mode with the right pixel format | |
920 | */ | |
921 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
922 | int mode, | |
923 | int pixfmt) | |
924 | { | |
925 | int modeU, modeD; | |
926 | ||
927 | modeU = modeD = mode; | |
928 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
929 | if (--modeD >= 0) { | |
c2446b3e JFM |
930 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
931 | == pixfmt) | |
63eb9546 JFM |
932 | return modeD; |
933 | } | |
934 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
935 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
936 | == pixfmt) | |
63eb9546 JFM |
937 | return modeU; |
938 | } | |
939 | } | |
940 | return -EINVAL; | |
941 | } | |
942 | ||
af1d9afa BJ |
943 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
944 | static int vidioc_g_register(struct file *file, void *priv, | |
945 | struct v4l2_dbg_register *reg) | |
946 | { | |
947 | int ret; | |
948 | struct gspca_dev *gspca_dev = priv; | |
949 | ||
950 | if (!gspca_dev->sd_desc->get_chip_ident) | |
951 | return -EINVAL; | |
952 | ||
953 | if (!gspca_dev->sd_desc->get_register) | |
954 | return -EINVAL; | |
955 | ||
956 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
957 | return -ERESTARTSYS; | |
8c4ebae4 | 958 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
959 | if (gspca_dev->present) |
960 | ret = gspca_dev->sd_desc->get_register(gspca_dev, reg); | |
961 | else | |
962 | ret = -ENODEV; | |
963 | mutex_unlock(&gspca_dev->usb_lock); | |
964 | ||
965 | return ret; | |
966 | } | |
967 | ||
968 | static int vidioc_s_register(struct file *file, void *priv, | |
969 | struct v4l2_dbg_register *reg) | |
970 | { | |
971 | int ret; | |
972 | struct gspca_dev *gspca_dev = priv; | |
973 | ||
974 | if (!gspca_dev->sd_desc->get_chip_ident) | |
975 | return -EINVAL; | |
976 | ||
977 | if (!gspca_dev->sd_desc->set_register) | |
978 | return -EINVAL; | |
979 | ||
980 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
981 | return -ERESTARTSYS; | |
8c4ebae4 | 982 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
983 | if (gspca_dev->present) |
984 | ret = gspca_dev->sd_desc->set_register(gspca_dev, reg); | |
985 | else | |
986 | ret = -ENODEV; | |
987 | mutex_unlock(&gspca_dev->usb_lock); | |
988 | ||
989 | return ret; | |
990 | } | |
991 | #endif | |
992 | ||
993 | static int vidioc_g_chip_ident(struct file *file, void *priv, | |
994 | struct v4l2_dbg_chip_ident *chip) | |
995 | { | |
996 | int ret; | |
997 | struct gspca_dev *gspca_dev = priv; | |
998 | ||
999 | if (!gspca_dev->sd_desc->get_chip_ident) | |
1000 | return -EINVAL; | |
1001 | ||
1002 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1003 | return -ERESTARTSYS; | |
8c4ebae4 | 1004 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
1005 | if (gspca_dev->present) |
1006 | ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip); | |
1007 | else | |
1008 | ret = -ENODEV; | |
1009 | mutex_unlock(&gspca_dev->usb_lock); | |
1010 | ||
1011 | return ret; | |
1012 | } | |
1013 | ||
e078770a | 1014 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1015 | struct v4l2_fmtdesc *fmtdesc) |
1016 | { | |
1017 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 1018 | int i, j, index; |
63eb9546 JFM |
1019 | __u32 fmt_tb[8]; |
1020 | ||
63eb9546 JFM |
1021 | /* give an index to each format */ |
1022 | index = 0; | |
1023 | j = 0; | |
1024 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 1025 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
1026 | j = 0; |
1027 | for (;;) { | |
1028 | if (fmt_tb[j] == fmt_tb[index]) | |
1029 | break; | |
1030 | j++; | |
1031 | } | |
1032 | if (j == index) { | |
1033 | if (fmtdesc->index == index) | |
1034 | break; /* new format */ | |
1035 | index++; | |
80297125 | 1036 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
1037 | return -EINVAL; |
1038 | } | |
1039 | } | |
1040 | if (i < 0) | |
1041 | return -EINVAL; /* no more format */ | |
1042 | ||
63eb9546 JFM |
1043 | fmtdesc->pixelformat = fmt_tb[index]; |
1044 | if (gspca_is_compressed(fmt_tb[index])) | |
1045 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
1046 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
1047 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
1048 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
1049 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
1050 | fmtdesc->description[4] = '\0'; | |
1051 | return 0; | |
1052 | } | |
1053 | ||
e078770a | 1054 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1055 | struct v4l2_format *fmt) |
1056 | { | |
1057 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 1058 | int mode; |
63eb9546 | 1059 | |
c2446b3e JFM |
1060 | mode = gspca_dev->curr_mode; |
1061 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
1062 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1063 | return 0; |
1064 | } | |
1065 | ||
e078770a | 1066 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1067 | struct v4l2_format *fmt) |
1068 | { | |
24c530b4 | 1069 | int w, h, mode, mode2; |
63eb9546 | 1070 | |
4aa0d037 JFM |
1071 | w = fmt->fmt.pix.width; |
1072 | h = fmt->fmt.pix.height; | |
d43fa32f | 1073 | |
335b3f88 | 1074 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1075 | if (gspca_debug & D_CONF) |
1076 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
1077 | #endif | |
1078 | /* search the closest mode for width and height */ | |
1079 | mode = wxh_to_mode(gspca_dev, w, h); | |
1080 | ||
1081 | /* OK if right palette */ | |
c2446b3e JFM |
1082 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1083 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
1084 | |
1085 | /* else, search the closest mode with the same pixel format */ | |
1086 | mode2 = gspca_get_mode(gspca_dev, mode, | |
1087 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 1088 | if (mode2 >= 0) |
63eb9546 | 1089 | mode = mode2; |
c2446b3e JFM |
1090 | /* else |
1091 | ; * no chance, return this mode */ | |
63eb9546 | 1092 | } |
c2446b3e JFM |
1093 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
1094 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1095 | return mode; /* used when s_fmt */ |
1096 | } | |
1097 | ||
e078770a | 1098 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
1099 | void *priv, |
1100 | struct v4l2_format *fmt) | |
1101 | { | |
4aa0d037 | 1102 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
1103 | int ret; |
1104 | ||
e078770a | 1105 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1106 | if (ret < 0) |
1107 | return ret; | |
1108 | return 0; | |
1109 | } | |
1110 | ||
e078770a | 1111 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1112 | struct v4l2_format *fmt) |
1113 | { | |
1114 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1115 | int ret; |
63eb9546 | 1116 | |
e2997a72 HG |
1117 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1118 | return -ERESTARTSYS; | |
d43fa32f | 1119 | |
e078770a | 1120 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1121 | if (ret < 0) |
1122 | goto out; | |
1123 | ||
d43fa32f JFM |
1124 | if (gspca_dev->nframes != 0 |
1125 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
1126 | ret = -EINVAL; | |
1127 | goto out; | |
1128 | } | |
1129 | ||
50a871fe JFM |
1130 | if (ret == gspca_dev->curr_mode) { |
1131 | ret = 0; | |
63eb9546 | 1132 | goto out; /* same mode */ |
50a871fe | 1133 | } |
d43fa32f JFM |
1134 | |
1135 | if (gspca_dev->streaming) { | |
1136 | ret = -EBUSY; | |
1137 | goto out; | |
e2997a72 | 1138 | } |
4aa0d037 JFM |
1139 | gspca_dev->width = fmt->fmt.pix.width; |
1140 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
1141 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
1142 | gspca_dev->curr_mode = ret; | |
d43fa32f | 1143 | |
d43fa32f | 1144 | ret = 0; |
63eb9546 JFM |
1145 | out: |
1146 | mutex_unlock(&gspca_dev->queue_lock); | |
1147 | return ret; | |
1148 | } | |
1149 | ||
11c635a2 HG |
1150 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1151 | struct v4l2_frmsizeenum *fsize) | |
1152 | { | |
1153 | struct gspca_dev *gspca_dev = priv; | |
1154 | int i; | |
1155 | __u32 index = 0; | |
1156 | ||
1157 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
1158 | if (fsize->pixel_format != | |
1159 | gspca_dev->cam.cam_mode[i].pixelformat) | |
1160 | continue; | |
1161 | ||
1162 | if (fsize->index == index) { | |
1163 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1164 | fsize->discrete.width = | |
1165 | gspca_dev->cam.cam_mode[i].width; | |
1166 | fsize->discrete.height = | |
1167 | gspca_dev->cam.cam_mode[i].height; | |
1168 | return 0; | |
1169 | } | |
1170 | index++; | |
1171 | } | |
1172 | ||
1173 | return -EINVAL; | |
1174 | } | |
1175 | ||
28ffe77f AO |
1176 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1177 | struct v4l2_frmivalenum *fival) | |
1178 | { | |
1179 | struct gspca_dev *gspca_dev = priv; | |
1180 | int mode = wxh_to_mode(gspca_dev, fival->width, fival->height); | |
1181 | __u32 i; | |
1182 | ||
1183 | if (gspca_dev->cam.mode_framerates == NULL || | |
1184 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
1185 | return -EINVAL; | |
1186 | ||
1187 | if (fival->pixel_format != | |
1188 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1189 | return -EINVAL; | |
1190 | ||
1191 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1192 | if (fival->index == i) { | |
1193 | fival->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1194 | fival->discrete.numerator = 1; | |
1195 | fival->discrete.denominator = | |
1196 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1197 | return 0; | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | return -EINVAL; | |
1202 | } | |
1203 | ||
d0182306 | 1204 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 1205 | { |
d0182306 | 1206 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 1207 | |
38c7c036 LP |
1208 | PDEBUG(D_PROBE, "%s released", |
1209 | video_device_node_name(&gspca_dev->vdev)); | |
6b060ffe FZ |
1210 | |
1211 | kfree(gspca_dev->usb_buf); | |
1212 | kfree(gspca_dev); | |
1213 | } | |
1214 | ||
bec43661 | 1215 | static int dev_open(struct file *file) |
63eb9546 JFM |
1216 | { |
1217 | struct gspca_dev *gspca_dev; | |
63eb9546 | 1218 | |
0d07e240 | 1219 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
a12ca6a6 | 1220 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
7f6eb118 HG |
1221 | if (!gspca_dev->present) |
1222 | return -ENODEV; | |
5c4fa002 JFM |
1223 | |
1224 | /* protect the subdriver against rmmod */ | |
7f6eb118 HG |
1225 | if (!try_module_get(gspca_dev->module)) |
1226 | return -ENODEV; | |
6b060ffe | 1227 | |
63eb9546 | 1228 | file->private_data = gspca_dev; |
335b3f88 | 1229 | #ifdef GSPCA_DEBUG |
63eb9546 | 1230 | /* activate the v4l2 debug */ |
d43fa32f | 1231 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 1232 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 1233 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 1234 | else |
a12ca6a6 | 1235 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 1236 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 1237 | #endif |
7f6eb118 | 1238 | return 0; |
63eb9546 JFM |
1239 | } |
1240 | ||
bec43661 | 1241 | static int dev_close(struct file *file) |
63eb9546 JFM |
1242 | { |
1243 | struct gspca_dev *gspca_dev = file->private_data; | |
1244 | ||
0d07e240 | 1245 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
e2997a72 HG |
1246 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1247 | return -ERESTARTSYS; | |
e2997a72 | 1248 | |
5b77ae77 | 1249 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1250 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
1251 | if (gspca_dev->streaming) { |
1252 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1253 | gspca_dev->usb_err = 0; |
a1e8288b JFM |
1254 | gspca_stream_off(gspca_dev); |
1255 | mutex_unlock(&gspca_dev->usb_lock); | |
1256 | } | |
4aa0d037 | 1257 | frame_free(gspca_dev); |
4aa0d037 | 1258 | } |
d43fa32f | 1259 | file->private_data = NULL; |
5c4fa002 | 1260 | module_put(gspca_dev->module); |
63eb9546 | 1261 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1262 | |
d43fa32f | 1263 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1264 | |
63eb9546 JFM |
1265 | return 0; |
1266 | } | |
1267 | ||
1268 | static int vidioc_querycap(struct file *file, void *priv, | |
1269 | struct v4l2_capability *cap) | |
1270 | { | |
1271 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 1272 | int ret; |
63eb9546 | 1273 | |
090264e5 JFM |
1274 | /* protect the access to the usb device */ |
1275 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1276 | return -ERESTARTSYS; | |
1277 | if (!gspca_dev->present) { | |
1278 | ret = -ENODEV; | |
1279 | goto out; | |
1280 | } | |
d8518590 JFM |
1281 | strncpy((char *) cap->driver, gspca_dev->sd_desc->name, |
1282 | sizeof cap->driver); | |
c6edaf16 | 1283 | if (gspca_dev->dev->product != NULL) { |
d8518590 | 1284 | strncpy((char *) cap->card, gspca_dev->dev->product, |
c6edaf16 JFM |
1285 | sizeof cap->card); |
1286 | } else { | |
d8518590 | 1287 | snprintf((char *) cap->card, sizeof cap->card, |
c6edaf16 JFM |
1288 | "USB Camera (%04x:%04x)", |
1289 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1290 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1291 | } | |
d8518590 JFM |
1292 | usb_make_path(gspca_dev->dev, (char *) cap->bus_info, |
1293 | sizeof(cap->bus_info)); | |
63eb9546 JFM |
1294 | cap->version = DRIVER_VERSION_NUMBER; |
1295 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
1296 | | V4L2_CAP_STREAMING | |
1297 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
1298 | ret = 0; |
1299 | out: | |
1300 | mutex_unlock(&gspca_dev->usb_lock); | |
1301 | return ret; | |
63eb9546 JFM |
1302 | } |
1303 | ||
6a33091f | 1304 | static int get_ctrl(struct gspca_dev *gspca_dev, |
a0001a28 HG |
1305 | int id) |
1306 | { | |
1307 | const struct ctrl *ctrls; | |
1308 | int i; | |
1309 | ||
1310 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1311 | i < gspca_dev->sd_desc->nctrls; | |
1312 | i++, ctrls++) { | |
1313 | if (gspca_dev->ctrl_dis & (1 << i)) | |
1314 | continue; | |
1315 | if (id == ctrls->qctrl.id) | |
6a33091f | 1316 | return i; |
a0001a28 | 1317 | } |
6a33091f | 1318 | return -1; |
a0001a28 HG |
1319 | } |
1320 | ||
63eb9546 JFM |
1321 | static int vidioc_queryctrl(struct file *file, void *priv, |
1322 | struct v4l2_queryctrl *q_ctrl) | |
1323 | { | |
1324 | struct gspca_dev *gspca_dev = priv; | |
a0001a28 | 1325 | const struct ctrl *ctrls; |
6a33091f JFM |
1326 | struct gspca_ctrl *gspca_ctrl; |
1327 | int i, idx; | |
6a7eba24 JFM |
1328 | u32 id; |
1329 | ||
1330 | id = q_ctrl->id; | |
1331 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1332 | id &= V4L2_CTRL_ID_MASK; | |
1333 | id++; | |
6a33091f | 1334 | idx = -1; |
6a7eba24 | 1335 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
a0001a28 | 1336 | if (gspca_dev->ctrl_dis & (1 << i)) |
f50ba1be | 1337 | continue; |
b8bfb5fb | 1338 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be | 1339 | continue; |
6a33091f JFM |
1340 | if (idx >= 0 |
1341 | && gspca_dev->sd_desc->ctrls[i].qctrl.id | |
780e3121 | 1342 | > gspca_dev->sd_desc->ctrls[idx].qctrl.id) |
b8bfb5fb | 1343 | continue; |
6a33091f | 1344 | idx = i; |
63eb9546 | 1345 | } |
a0001a28 | 1346 | } else { |
6a33091f | 1347 | idx = get_ctrl(gspca_dev, id); |
63eb9546 | 1348 | } |
6a33091f JFM |
1349 | if (idx < 0) |
1350 | return -EINVAL; | |
1351 | ctrls = &gspca_dev->sd_desc->ctrls[idx]; | |
1352 | memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl); | |
1353 | if (gspca_dev->cam.ctrls != NULL) { | |
1354 | gspca_ctrl = &gspca_dev->cam.ctrls[idx]; | |
1355 | q_ctrl->default_value = gspca_ctrl->def; | |
1356 | q_ctrl->minimum = gspca_ctrl->min; | |
1357 | q_ctrl->maximum = gspca_ctrl->max; | |
1358 | } | |
1359 | if (gspca_dev->ctrl_inac & (1 << idx)) | |
4af85668 | 1360 | q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; |
f50ba1be | 1361 | return 0; |
63eb9546 JFM |
1362 | } |
1363 | ||
1364 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1365 | struct v4l2_control *ctrl) | |
1366 | { | |
1367 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1368 | const struct ctrl *ctrls; |
6a33091f JFM |
1369 | struct gspca_ctrl *gspca_ctrl; |
1370 | int idx, ret; | |
63eb9546 | 1371 | |
6a33091f JFM |
1372 | idx = get_ctrl(gspca_dev, ctrl->id); |
1373 | if (idx < 0) | |
a0001a28 | 1374 | return -EINVAL; |
6a33091f JFM |
1375 | if (gspca_dev->ctrl_inac & (1 << idx)) |
1376 | return -EINVAL; | |
1377 | ctrls = &gspca_dev->sd_desc->ctrls[idx]; | |
1378 | if (gspca_dev->cam.ctrls != NULL) { | |
1379 | gspca_ctrl = &gspca_dev->cam.ctrls[idx]; | |
1380 | if (ctrl->value < gspca_ctrl->min | |
1381 | || ctrl->value > gspca_ctrl->max) | |
1382 | return -ERANGE; | |
1383 | } else { | |
1384 | gspca_ctrl = NULL; | |
1385 | if (ctrl->value < ctrls->qctrl.minimum | |
1386 | || ctrl->value > ctrls->qctrl.maximum) | |
1387 | return -ERANGE; | |
1388 | } | |
a0001a28 HG |
1389 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); |
1390 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1391 | return -ERESTARTSYS; | |
6a33091f JFM |
1392 | if (!gspca_dev->present) { |
1393 | ret = -ENODEV; | |
1394 | goto out; | |
1395 | } | |
8c4ebae4 | 1396 | gspca_dev->usb_err = 0; |
6a33091f | 1397 | if (ctrls->set != NULL) { |
a0001a28 | 1398 | ret = ctrls->set(gspca_dev, ctrl->value); |
6a33091f JFM |
1399 | goto out; |
1400 | } | |
1401 | if (gspca_ctrl != NULL) { | |
1402 | gspca_ctrl->val = ctrl->value; | |
1403 | if (ctrls->set_control != NULL | |
1404 | && gspca_dev->streaming) | |
1405 | ctrls->set_control(gspca_dev); | |
1406 | } | |
1407 | ret = gspca_dev->usb_err; | |
1408 | out: | |
a0001a28 HG |
1409 | mutex_unlock(&gspca_dev->usb_lock); |
1410 | return ret; | |
63eb9546 JFM |
1411 | } |
1412 | ||
1413 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1414 | struct v4l2_control *ctrl) | |
1415 | { | |
1416 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1417 | const struct ctrl *ctrls; |
6a33091f | 1418 | int idx, ret; |
63eb9546 | 1419 | |
6a33091f JFM |
1420 | idx = get_ctrl(gspca_dev, ctrl->id); |
1421 | if (idx < 0) | |
a0001a28 | 1422 | return -EINVAL; |
6a33091f | 1423 | ctrls = &gspca_dev->sd_desc->ctrls[idx]; |
a0001a28 HG |
1424 | |
1425 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1426 | return -ERESTARTSYS; | |
6a33091f JFM |
1427 | if (!gspca_dev->present) { |
1428 | ret = -ENODEV; | |
1429 | goto out; | |
1430 | } | |
8c4ebae4 | 1431 | gspca_dev->usb_err = 0; |
6a33091f | 1432 | if (ctrls->get != NULL) { |
a0001a28 | 1433 | ret = ctrls->get(gspca_dev, &ctrl->value); |
6a33091f JFM |
1434 | goto out; |
1435 | } | |
1436 | if (gspca_dev->cam.ctrls != NULL) | |
1437 | ctrl->value = gspca_dev->cam.ctrls[idx].val; | |
1438 | ret = 0; | |
1439 | out: | |
a0001a28 HG |
1440 | mutex_unlock(&gspca_dev->usb_lock); |
1441 | return ret; | |
63eb9546 JFM |
1442 | } |
1443 | ||
1444 | static int vidioc_querymenu(struct file *file, void *priv, | |
1445 | struct v4l2_querymenu *qmenu) | |
1446 | { | |
1447 | struct gspca_dev *gspca_dev = priv; | |
1448 | ||
1449 | if (!gspca_dev->sd_desc->querymenu) | |
1450 | return -EINVAL; | |
1451 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1452 | } | |
1453 | ||
1454 | static int vidioc_enum_input(struct file *file, void *priv, | |
1455 | struct v4l2_input *input) | |
1456 | { | |
1457 | struct gspca_dev *gspca_dev = priv; | |
1458 | ||
1459 | if (input->index != 0) | |
1460 | return -EINVAL; | |
63eb9546 | 1461 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1462 | input->status = gspca_dev->cam.input_flags; |
63eb9546 JFM |
1463 | strncpy(input->name, gspca_dev->sd_desc->name, |
1464 | sizeof input->name); | |
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1469 | { | |
1470 | *i = 0; | |
1471 | return 0; | |
1472 | } | |
1473 | ||
1474 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1475 | { | |
1476 | if (i > 0) | |
1477 | return -EINVAL; | |
1478 | return (0); | |
1479 | } | |
1480 | ||
1481 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1482 | struct v4l2_requestbuffers *rb) | |
1483 | { | |
1484 | struct gspca_dev *gspca_dev = priv; | |
832d0a91 | 1485 | int i, ret = 0, streaming; |
63eb9546 | 1486 | |
a2ba6f27 JFM |
1487 | i = rb->memory; /* (avoid compilation warning) */ |
1488 | switch (i) { | |
5b77ae77 | 1489 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1490 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1491 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1492 | break; |
d43fa32f | 1493 | default: |
63eb9546 | 1494 | return -EINVAL; |
d43fa32f | 1495 | } |
e2997a72 HG |
1496 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1497 | return -ERESTARTSYS; | |
d43fa32f | 1498 | |
5b77ae77 | 1499 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
ce5610bc | 1500 | && gspca_dev->memory != GSPCA_MEMORY_READ |
5b77ae77 | 1501 | && gspca_dev->memory != rb->memory) { |
4aa0d037 JFM |
1502 | ret = -EBUSY; |
1503 | goto out; | |
1504 | } | |
d43fa32f | 1505 | |
5b77ae77 JFM |
1506 | /* only one file may do the capture */ |
1507 | if (gspca_dev->capt_file != NULL | |
1508 | && gspca_dev->capt_file != file) { | |
1509 | ret = -EBUSY; | |
1510 | goto out; | |
1511 | } | |
1512 | ||
1513 | /* if allocated, the buffers must not be mapped */ | |
1514 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1515 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1516 | ret = -EBUSY; |
1517 | goto out; | |
1518 | } | |
5b77ae77 JFM |
1519 | } |
1520 | ||
1521 | /* stop streaming */ | |
832d0a91 JFM |
1522 | streaming = gspca_dev->streaming; |
1523 | if (streaming) { | |
5b77ae77 | 1524 | mutex_lock(&gspca_dev->usb_lock); |
8c4ebae4 | 1525 | gspca_dev->usb_err = 0; |
5b77ae77 JFM |
1526 | gspca_stream_off(gspca_dev); |
1527 | mutex_unlock(&gspca_dev->usb_lock); | |
1528 | } | |
ce5610bc HG |
1529 | /* Don't restart the stream when switching from read to mmap mode */ |
1530 | if (gspca_dev->memory == GSPCA_MEMORY_READ) | |
1531 | streaming = 0; | |
5b77ae77 JFM |
1532 | |
1533 | /* free the previous allocated buffers, if any */ | |
d642de2e | 1534 | if (gspca_dev->nframes != 0) |
5b77ae77 | 1535 | frame_free(gspca_dev); |
5b77ae77 JFM |
1536 | if (rb->count == 0) /* unrequest */ |
1537 | goto out; | |
d642de2e | 1538 | ret = frame_alloc(gspca_dev, file, rb->memory, rb->count); |
5b77ae77 JFM |
1539 | if (ret == 0) { |
1540 | rb->count = gspca_dev->nframes; | |
832d0a91 JFM |
1541 | if (streaming) |
1542 | ret = gspca_init_transfer(gspca_dev); | |
4aa0d037 JFM |
1543 | } |
1544 | out: | |
63eb9546 JFM |
1545 | mutex_unlock(&gspca_dev->queue_lock); |
1546 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1547 | return ret; | |
1548 | } | |
1549 | ||
1550 | static int vidioc_querybuf(struct file *file, void *priv, | |
1551 | struct v4l2_buffer *v4l2_buf) | |
1552 | { | |
1553 | struct gspca_dev *gspca_dev = priv; | |
1554 | struct gspca_frame *frame; | |
1555 | ||
13752bd9 | 1556 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1557 | || v4l2_buf->index >= gspca_dev->nframes) |
1558 | return -EINVAL; | |
1559 | ||
1560 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1561 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static int vidioc_streamon(struct file *file, void *priv, | |
1566 | enum v4l2_buf_type buf_type) | |
1567 | { | |
1568 | struct gspca_dev *gspca_dev = priv; | |
1569 | int ret; | |
1570 | ||
63eb9546 JFM |
1571 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1572 | return -EINVAL; | |
e2997a72 HG |
1573 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1574 | return -ERESTARTSYS; | |
090264e5 | 1575 | |
18bf99aa JFM |
1576 | /* check the capture file */ |
1577 | if (gspca_dev->capt_file != file) { | |
1578 | ret = -EBUSY; | |
1579 | goto out; | |
1580 | } | |
1581 | ||
1edabe71 JFM |
1582 | if (gspca_dev->nframes == 0 |
1583 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1584 | ret = -EINVAL; |
1585 | goto out; | |
1586 | } | |
1587 | if (!gspca_dev->streaming) { | |
1588 | ret = gspca_init_transfer(gspca_dev); | |
1589 | if (ret < 0) | |
1590 | goto out; | |
1591 | } | |
335b3f88 | 1592 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1593 | if (gspca_debug & D_STREAM) { |
1594 | PDEBUG_MODE("stream on OK", | |
1595 | gspca_dev->pixfmt, | |
1596 | gspca_dev->width, | |
1597 | gspca_dev->height); | |
1598 | } | |
1599 | #endif | |
e2997a72 | 1600 | ret = 0; |
63eb9546 JFM |
1601 | out: |
1602 | mutex_unlock(&gspca_dev->queue_lock); | |
1603 | return ret; | |
1604 | } | |
1605 | ||
1606 | static int vidioc_streamoff(struct file *file, void *priv, | |
1607 | enum v4l2_buf_type buf_type) | |
1608 | { | |
1609 | struct gspca_dev *gspca_dev = priv; | |
f7059eaa | 1610 | int ret; |
63eb9546 | 1611 | |
63eb9546 JFM |
1612 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1613 | return -EINVAL; | |
4e770f76 | 1614 | |
4aa0d037 JFM |
1615 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1616 | return -ERESTARTSYS; | |
5b77ae77 | 1617 | |
4e770f76 HG |
1618 | if (!gspca_dev->streaming) { |
1619 | ret = 0; | |
1620 | goto out; | |
1621 | } | |
1622 | ||
18bf99aa JFM |
1623 | /* check the capture file */ |
1624 | if (gspca_dev->capt_file != file) { | |
1625 | ret = -EBUSY; | |
1626 | goto out; | |
1627 | } | |
1628 | ||
5b77ae77 | 1629 | /* stop streaming */ |
4aa0d037 JFM |
1630 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1631 | ret = -ERESTARTSYS; | |
1632 | goto out; | |
63eb9546 | 1633 | } |
8c4ebae4 | 1634 | gspca_dev->usb_err = 0; |
4aa0d037 | 1635 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1636 | mutex_unlock(&gspca_dev->usb_lock); |
0d0ae15d HG |
1637 | /* In case another thread is waiting in dqbuf */ |
1638 | wake_up_interruptible(&gspca_dev->wq); | |
5b77ae77 | 1639 | |
f7059eaa JFM |
1640 | /* empty the transfer queues */ |
1641 | atomic_set(&gspca_dev->fr_q, 0); | |
1642 | atomic_set(&gspca_dev->fr_i, 0); | |
1643 | gspca_dev->fr_o = 0; | |
5b77ae77 | 1644 | ret = 0; |
4aa0d037 JFM |
1645 | out: |
1646 | mutex_unlock(&gspca_dev->queue_lock); | |
1647 | return ret; | |
63eb9546 JFM |
1648 | } |
1649 | ||
1650 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1651 | struct v4l2_jpegcompression *jpegcomp) | |
1652 | { | |
1653 | struct gspca_dev *gspca_dev = priv; | |
1654 | int ret; | |
1655 | ||
1656 | if (!gspca_dev->sd_desc->get_jcomp) | |
1657 | return -EINVAL; | |
e2997a72 HG |
1658 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1659 | return -ERESTARTSYS; | |
8c4ebae4 | 1660 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1661 | if (gspca_dev->present) |
1662 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1663 | else | |
1664 | ret = -ENODEV; | |
63eb9546 JFM |
1665 | mutex_unlock(&gspca_dev->usb_lock); |
1666 | return ret; | |
1667 | } | |
1668 | ||
1669 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1670 | struct v4l2_jpegcompression *jpegcomp) | |
1671 | { | |
1672 | struct gspca_dev *gspca_dev = priv; | |
1673 | int ret; | |
1674 | ||
63eb9546 JFM |
1675 | if (!gspca_dev->sd_desc->set_jcomp) |
1676 | return -EINVAL; | |
f86d4a91 JP |
1677 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1678 | return -ERESTARTSYS; | |
8c4ebae4 | 1679 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1680 | if (gspca_dev->present) |
1681 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1682 | else | |
1683 | ret = -ENODEV; | |
63eb9546 JFM |
1684 | mutex_unlock(&gspca_dev->usb_lock); |
1685 | return ret; | |
1686 | } | |
1687 | ||
1688 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1689 | struct v4l2_streamparm *parm) | |
1690 | { | |
1691 | struct gspca_dev *gspca_dev = priv; | |
1692 | ||
63eb9546 | 1693 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1694 | |
1695 | if (gspca_dev->sd_desc->get_streamparm) { | |
1696 | int ret; | |
1697 | ||
1698 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1699 | return -ERESTARTSYS; | |
668f44a6 JFM |
1700 | if (gspca_dev->present) { |
1701 | gspca_dev->usb_err = 0; | |
1702 | gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); | |
1703 | ret = gspca_dev->usb_err; | |
1704 | } else { | |
090264e5 | 1705 | ret = -ENODEV; |
668f44a6 | 1706 | } |
627a5ef7 JP |
1707 | mutex_unlock(&gspca_dev->usb_lock); |
1708 | return ret; | |
1709 | } | |
1710 | ||
63eb9546 JFM |
1711 | return 0; |
1712 | } | |
1713 | ||
1714 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1715 | struct v4l2_streamparm *parm) | |
1716 | { | |
1717 | struct gspca_dev *gspca_dev = priv; | |
1718 | int n; | |
1719 | ||
63eb9546 | 1720 | n = parm->parm.capture.readbuffers; |
f7059eaa | 1721 | if (n == 0 || n >= GSPCA_MAX_FRAMES) |
63eb9546 JFM |
1722 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
1723 | else | |
1724 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1725 | |
1726 | if (gspca_dev->sd_desc->set_streamparm) { | |
1727 | int ret; | |
1728 | ||
1729 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1730 | return -ERESTARTSYS; | |
668f44a6 JFM |
1731 | if (gspca_dev->present) { |
1732 | gspca_dev->usb_err = 0; | |
1733 | gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); | |
1734 | ret = gspca_dev->usb_err; | |
1735 | } else { | |
090264e5 | 1736 | ret = -ENODEV; |
668f44a6 | 1737 | } |
627a5ef7 JP |
1738 | mutex_unlock(&gspca_dev->usb_lock); |
1739 | return ret; | |
1740 | } | |
1741 | ||
63eb9546 JFM |
1742 | return 0; |
1743 | } | |
1744 | ||
63eb9546 JFM |
1745 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) |
1746 | { | |
1747 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1748 | struct gspca_frame *frame; |
63eb9546 JFM |
1749 | struct page *page; |
1750 | unsigned long addr, start, size; | |
1751 | int i, ret; | |
63eb9546 JFM |
1752 | |
1753 | start = vma->vm_start; | |
1754 | size = vma->vm_end - vma->vm_start; | |
1755 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1756 | ||
e2997a72 HG |
1757 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1758 | return -ERESTARTSYS; | |
63eb9546 JFM |
1759 | if (!gspca_dev->present) { |
1760 | ret = -ENODEV; | |
4aa0d037 JFM |
1761 | goto out; |
1762 | } | |
1763 | if (gspca_dev->capt_file != file) { | |
1764 | ret = -EINVAL; | |
1765 | goto out; | |
63eb9546 JFM |
1766 | } |
1767 | ||
efab8211 | 1768 | frame = NULL; |
63eb9546 JFM |
1769 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1770 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1771 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1772 | break; | |
1773 | } | |
1774 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1775 | == vma->vm_pgoff) { | |
1776 | frame = &gspca_dev->frame[i]; | |
1777 | break; | |
1778 | } | |
1779 | } | |
efab8211 | 1780 | if (frame == NULL) { |
63eb9546 JFM |
1781 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1782 | ret = -EINVAL; | |
4aa0d037 | 1783 | goto out; |
63eb9546 | 1784 | } |
38bff697 | 1785 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1786 | PDEBUG(D_STREAM, "mmap bad size"); |
1787 | ret = -EINVAL; | |
4aa0d037 | 1788 | goto out; |
63eb9546 JFM |
1789 | } |
1790 | ||
1791 | /* | |
1792 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1793 | * device. It also prevents the region from being core dumped. | |
1794 | */ | |
1795 | vma->vm_flags |= VM_IO; | |
1796 | ||
1797 | addr = (unsigned long) frame->data; | |
1798 | while (size > 0) { | |
1799 | page = vmalloc_to_page((void *) addr); | |
1800 | ret = vm_insert_page(vma, start, page); | |
1801 | if (ret < 0) | |
4aa0d037 | 1802 | goto out; |
63eb9546 JFM |
1803 | start += PAGE_SIZE; |
1804 | addr += PAGE_SIZE; | |
1805 | size -= PAGE_SIZE; | |
1806 | } | |
1807 | ||
d50e257e | 1808 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1809 | vma->vm_private_data = frame; |
1810 | gspca_vm_open(vma); | |
e2997a72 | 1811 | ret = 0; |
4aa0d037 | 1812 | out: |
63eb9546 JFM |
1813 | mutex_unlock(&gspca_dev->queue_lock); |
1814 | return ret; | |
1815 | } | |
1816 | ||
27074efa HG |
1817 | static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file, |
1818 | enum v4l2_memory memory) | |
1819 | { | |
1820 | if (!gspca_dev->present) | |
1821 | return -ENODEV; | |
1822 | if (gspca_dev->capt_file != file || gspca_dev->memory != memory || | |
1823 | !gspca_dev->streaming) | |
1824 | return -EINVAL; | |
1825 | ||
1826 | /* check if a frame is ready */ | |
1827 | return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i); | |
1828 | } | |
1829 | ||
1830 | static int frame_ready(struct gspca_dev *gspca_dev, struct file *file, | |
1831 | enum v4l2_memory memory) | |
1832 | { | |
1833 | int ret; | |
1834 | ||
1835 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1836 | return -ERESTARTSYS; | |
1837 | ret = frame_ready_nolock(gspca_dev, file, memory); | |
1838 | mutex_unlock(&gspca_dev->queue_lock); | |
1839 | return ret; | |
1840 | } | |
1841 | ||
63eb9546 | 1842 | /* |
27074efa | 1843 | * dequeue a video buffer |
63eb9546 | 1844 | * |
27074efa | 1845 | * If nonblock_ing is false, block until a buffer is available. |
63eb9546 | 1846 | */ |
27074efa HG |
1847 | static int vidioc_dqbuf(struct file *file, void *priv, |
1848 | struct v4l2_buffer *v4l2_buf) | |
63eb9546 | 1849 | { |
27074efa HG |
1850 | struct gspca_dev *gspca_dev = priv; |
1851 | struct gspca_frame *frame; | |
1852 | int i, j, ret; | |
63eb9546 | 1853 | |
27074efa HG |
1854 | PDEBUG(D_FRAM, "dqbuf"); |
1855 | ||
1856 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1857 | return -ERESTARTSYS; | |
1858 | ||
1859 | for (;;) { | |
1860 | ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory); | |
1861 | if (ret < 0) | |
1862 | goto out; | |
1863 | if (ret > 0) | |
1864 | break; | |
1865 | ||
1866 | mutex_unlock(&gspca_dev->queue_lock); | |
1867 | ||
1868 | if (file->f_flags & O_NONBLOCK) | |
181b704f HG |
1869 | return -EAGAIN; |
1870 | ||
1871 | /* wait till a frame is ready */ | |
4aa0d037 | 1872 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
27074efa | 1873 | frame_ready(gspca_dev, file, v4l2_buf->memory), |
181b704f HG |
1874 | msecs_to_jiffies(3000)); |
1875 | if (ret < 0) | |
1876 | return ret; | |
27074efa | 1877 | if (ret == 0) |
e2997a72 | 1878 | return -EIO; |
27074efa HG |
1879 | |
1880 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1881 | return -ERESTARTSYS; | |
63eb9546 | 1882 | } |
181b704f | 1883 | |
27074efa HG |
1884 | i = gspca_dev->fr_o; |
1885 | j = gspca_dev->fr_queue[i]; | |
1886 | frame = &gspca_dev->frame[j]; | |
1887 | ||
f7059eaa | 1888 | gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; |
e2997a72 | 1889 | |
739570bb JFM |
1890 | if (gspca_dev->sd_desc->dq_callback) { |
1891 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1892 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1893 | if (gspca_dev->present) |
1894 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1895 | mutex_unlock(&gspca_dev->usb_lock); |
1896 | } | |
5b77ae77 | 1897 | |
4a82bc60 HG |
1898 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1899 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1900 | PDEBUG(D_FRAM, "dqbuf %d", j); | |
1901 | ret = 0; | |
1902 | ||
ac0d6df6 | 1903 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1904 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1905 | frame->data, |
1906 | frame->v4l2_buf.bytesused)) { | |
1907 | PDEBUG(D_ERR|D_STREAM, | |
1908 | "dqbuf cp to user failed"); | |
1909 | ret = -EFAULT; | |
ac0d6df6 JFM |
1910 | } |
1911 | } | |
4aa0d037 | 1912 | out: |
27074efa | 1913 | mutex_unlock(&gspca_dev->queue_lock); |
63eb9546 JFM |
1914 | return ret; |
1915 | } | |
1916 | ||
1917 | /* | |
1918 | * queue a video buffer | |
1919 | * | |
1920 | * Attempting to queue a buffer that has already been | |
1921 | * queued will return -EINVAL. | |
1922 | */ | |
1923 | static int vidioc_qbuf(struct file *file, void *priv, | |
1924 | struct v4l2_buffer *v4l2_buf) | |
1925 | { | |
1926 | struct gspca_dev *gspca_dev = priv; | |
1927 | struct gspca_frame *frame; | |
1928 | int i, index, ret; | |
1929 | ||
1930 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1931 | |
5b77ae77 JFM |
1932 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1933 | return -ERESTARTSYS; | |
1934 | ||
63eb9546 JFM |
1935 | index = v4l2_buf->index; |
1936 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1937 | PDEBUG(D_FRAM, |
63eb9546 | 1938 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1939 | ret = -EINVAL; |
1940 | goto out; | |
63eb9546 | 1941 | } |
5b77ae77 | 1942 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1943 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1944 | ret = -EINVAL; |
1945 | goto out; | |
63eb9546 | 1946 | } |
e2997a72 | 1947 | |
5b77ae77 | 1948 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1949 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1950 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1951 | ret = -EINVAL; |
1952 | goto out; | |
1953 | } | |
1954 | ||
1955 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1956 | |
d43fa32f | 1957 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1958 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1959 | frame->v4l2_buf.length = v4l2_buf->length; | |
1960 | } | |
1961 | ||
1962 | /* put the buffer in the 'queued' queue */ | |
f7059eaa | 1963 | i = atomic_read(&gspca_dev->fr_q); |
63eb9546 | 1964 | gspca_dev->fr_queue[i] = index; |
f7059eaa | 1965 | atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); |
63eb9546 JFM |
1966 | |
1967 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1968 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1969 | ret = 0; | |
1970 | out: | |
1971 | mutex_unlock(&gspca_dev->queue_lock); | |
1972 | return ret; | |
1973 | } | |
1974 | ||
d43fa32f JFM |
1975 | /* |
1976 | * allocate the resources for read() | |
1977 | */ | |
1978 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1979 | struct file *file) | |
63eb9546 | 1980 | { |
63eb9546 | 1981 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1982 | int i, ret; |
63eb9546 | 1983 | |
d43fa32f | 1984 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1985 | if (gspca_dev->nframes == 0) { |
1986 | struct v4l2_requestbuffers rb; | |
1987 | ||
1988 | memset(&rb, 0, sizeof rb); | |
1989 | rb.count = gspca_dev->nbufread; | |
1990 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1991 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1992 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1993 | if (ret != 0) { | |
d43fa32f | 1994 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1995 | return ret; |
1996 | } | |
1997 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1998 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1999 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2000 | for (i = 0; i < gspca_dev->nbufread; i++) { |
2001 | v4l2_buf.index = i; | |
63eb9546 JFM |
2002 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
2003 | if (ret != 0) { | |
2004 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
2005 | return ret; | |
2006 | } | |
2007 | } | |
d43fa32f JFM |
2008 | gspca_dev->memory = GSPCA_MEMORY_READ; |
2009 | } | |
4aa0d037 | 2010 | |
d43fa32f JFM |
2011 | /* start streaming */ |
2012 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
2013 | if (ret != 0) | |
2014 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
2015 | return ret; | |
2016 | } | |
2017 | ||
2018 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
2019 | { | |
2020 | struct gspca_dev *gspca_dev = file->private_data; | |
f7059eaa | 2021 | int ret; |
d43fa32f JFM |
2022 | |
2023 | PDEBUG(D_FRAM, "poll"); | |
2024 | ||
2025 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 2026 | |
5b77ae77 | 2027 | /* if reqbufs is not done, the user would use read() */ |
ee362991 | 2028 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { |
d43fa32f | 2029 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
2030 | if (ret != 0) |
2031 | return POLLERR; | |
63eb9546 JFM |
2032 | } |
2033 | ||
d43fa32f JFM |
2034 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
2035 | return POLLERR; | |
d43fa32f | 2036 | |
f7059eaa JFM |
2037 | /* check if an image has been received */ |
2038 | if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) | |
2039 | ret = POLLIN | POLLRDNORM; /* yes */ | |
d43fa32f JFM |
2040 | else |
2041 | ret = 0; | |
d43fa32f | 2042 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
2043 | if (!gspca_dev->present) |
2044 | return POLLHUP; | |
d43fa32f JFM |
2045 | return ret; |
2046 | } | |
2047 | ||
2048 | static ssize_t dev_read(struct file *file, char __user *data, | |
2049 | size_t count, loff_t *ppos) | |
2050 | { | |
2051 | struct gspca_dev *gspca_dev = file->private_data; | |
2052 | struct gspca_frame *frame; | |
2053 | struct v4l2_buffer v4l2_buf; | |
2054 | struct timeval timestamp; | |
82643d0e | 2055 | int n, ret, ret2; |
d43fa32f | 2056 | |
a9e11134 | 2057 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
2058 | if (!gspca_dev->present) |
2059 | return -ENODEV; | |
ee362991 | 2060 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */ |
d43fa32f JFM |
2061 | ret = read_alloc(gspca_dev, file); |
2062 | if (ret != 0) | |
2063 | return ret; | |
d43fa32f JFM |
2064 | } |
2065 | ||
63eb9546 | 2066 | /* get a frame */ |
2f51d00f | 2067 | timestamp = ktime_to_timeval(ktime_get()); |
63eb9546 | 2068 | timestamp.tv_sec--; |
82643d0e JFM |
2069 | n = 2; |
2070 | for (;;) { | |
63eb9546 JFM |
2071 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
2072 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 2073 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2074 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
2075 | if (ret != 0) { | |
2076 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
2077 | return ret; | |
2078 | } | |
2079 | ||
2080 | /* if the process slept for more than 1 second, | |
219423c1 | 2081 | * get a newer frame */ |
63eb9546 | 2082 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
2083 | if (--n < 0) |
2084 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
2085 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
2086 | break; | |
2087 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2088 | if (ret != 0) { | |
2089 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
2090 | return ret; | |
2091 | } | |
2092 | } | |
2093 | ||
2094 | /* copy the frame */ | |
ac0d6df6 JFM |
2095 | if (count > frame->v4l2_buf.bytesused) |
2096 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
2097 | ret = copy_to_user(data, frame->data, count); |
2098 | if (ret != 0) { | |
2099 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 2100 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
2101 | ret = -EFAULT; |
2102 | goto out; | |
2103 | } | |
2104 | ret = count; | |
2105 | out: | |
2106 | /* in each case, requeue the buffer */ | |
2107 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2108 | if (ret2 != 0) | |
2109 | return ret2; | |
2110 | return ret; | |
2111 | } | |
2112 | ||
bec43661 | 2113 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
2114 | .owner = THIS_MODULE, |
2115 | .open = dev_open, | |
2116 | .release = dev_close, | |
2117 | .read = dev_read, | |
2118 | .mmap = dev_mmap, | |
bec43661 | 2119 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
2120 | .poll = dev_poll, |
2121 | }; | |
2122 | ||
a399810c | 2123 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
2124 | .vidioc_querycap = vidioc_querycap, |
2125 | .vidioc_dqbuf = vidioc_dqbuf, | |
2126 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
2127 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
2128 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
2129 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
2130 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
2131 | .vidioc_streamon = vidioc_streamon, |
2132 | .vidioc_queryctrl = vidioc_queryctrl, | |
2133 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
2134 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
2135 | .vidioc_querymenu = vidioc_querymenu, | |
2136 | .vidioc_enum_input = vidioc_enum_input, | |
2137 | .vidioc_g_input = vidioc_g_input, | |
2138 | .vidioc_s_input = vidioc_s_input, | |
2139 | .vidioc_reqbufs = vidioc_reqbufs, | |
2140 | .vidioc_querybuf = vidioc_querybuf, | |
2141 | .vidioc_streamoff = vidioc_streamoff, | |
2142 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
2143 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
2144 | .vidioc_g_parm = vidioc_g_parm, | |
2145 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2146 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2147 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa BJ |
2148 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
2149 | .vidioc_g_register = vidioc_g_register, | |
2150 | .vidioc_s_register = vidioc_s_register, | |
2151 | #endif | |
2152 | .vidioc_g_chip_ident = vidioc_g_chip_ident, | |
63eb9546 JFM |
2153 | }; |
2154 | ||
a399810c HV |
2155 | static struct video_device gspca_template = { |
2156 | .name = "gspca main driver", | |
a399810c HV |
2157 | .fops = &dev_fops, |
2158 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 2159 | .release = gspca_release, |
a399810c HV |
2160 | }; |
2161 | ||
6a33091f JFM |
2162 | /* initialize the controls */ |
2163 | static void ctrls_init(struct gspca_dev *gspca_dev) | |
2164 | { | |
2165 | struct gspca_ctrl *ctrl; | |
2166 | int i; | |
2167 | ||
2168 | for (i = 0, ctrl = gspca_dev->cam.ctrls; | |
2169 | i < gspca_dev->sd_desc->nctrls; | |
2170 | i++, ctrl++) { | |
2171 | ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value; | |
2172 | ctrl->val = ctrl->def; | |
2173 | ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum; | |
2174 | ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum; | |
2175 | } | |
2176 | } | |
2177 | ||
63eb9546 JFM |
2178 | /* |
2179 | * probe and create a new gspca device | |
2180 | * | |
2181 | * This function must be called by the sub-driver when it is | |
2182 | * called for probing a new device. | |
2183 | */ | |
4462864d | 2184 | int gspca_dev_probe2(struct usb_interface *intf, |
63eb9546 JFM |
2185 | const struct usb_device_id *id, |
2186 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2187 | int dev_size, |
2188 | struct module *module) | |
63eb9546 | 2189 | { |
63eb9546 JFM |
2190 | struct gspca_dev *gspca_dev; |
2191 | struct usb_device *dev = interface_to_usbdev(intf); | |
2192 | int ret; | |
63eb9546 | 2193 | |
6a7eba24 | 2194 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 | 2195 | |
63eb9546 JFM |
2196 | /* create the device */ |
2197 | if (dev_size < sizeof *gspca_dev) | |
2198 | dev_size = sizeof *gspca_dev; | |
2199 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2200 | if (!gspca_dev) { |
63eb9546 | 2201 | err("couldn't kzalloc gspca struct"); |
e293e599 | 2202 | return -ENOMEM; |
63eb9546 | 2203 | } |
8295d99e JFM |
2204 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2205 | if (!gspca_dev->usb_buf) { | |
2206 | err("out of memory"); | |
e293e599 | 2207 | ret = -ENOMEM; |
8295d99e JFM |
2208 | goto out; |
2209 | } | |
63eb9546 | 2210 | gspca_dev->dev = dev; |
4462864d | 2211 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
d43fa32f | 2212 | gspca_dev->nbalt = intf->num_altsetting; |
35680baa JFM |
2213 | |
2214 | /* check if any audio device */ | |
2215 | if (dev->config->desc.bNumInterfaces != 1) { | |
2216 | int i; | |
2217 | struct usb_interface *intf2; | |
2218 | ||
2219 | for (i = 0; i < dev->config->desc.bNumInterfaces; i++) { | |
2220 | intf2 = dev->config->interface[i]; | |
2221 | if (intf2 != NULL | |
2222 | && intf2->altsetting != NULL | |
2223 | && intf2->altsetting->desc.bInterfaceClass == | |
2224 | USB_CLASS_AUDIO) { | |
2225 | gspca_dev->audio = 1; | |
2226 | break; | |
2227 | } | |
2228 | } | |
2229 | } | |
2230 | ||
63eb9546 | 2231 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2232 | gspca_dev->nbufread = 2; |
ff374747 | 2233 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 2234 | |
012d6b02 | 2235 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2236 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2237 | if (ret < 0) |
2238 | goto out; | |
6a33091f JFM |
2239 | if (gspca_dev->cam.ctrls != NULL) |
2240 | ctrls_init(gspca_dev); | |
ba38ee8e | 2241 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
2242 | if (ret < 0) |
2243 | goto out; | |
2244 | gspca_set_default_mode(gspca_dev); | |
2245 | ||
10ee2402 HG |
2246 | ret = gspca_input_connect(gspca_dev); |
2247 | if (ret) | |
2248 | goto out; | |
2249 | ||
63eb9546 | 2250 | mutex_init(&gspca_dev->usb_lock); |
63eb9546 JFM |
2251 | mutex_init(&gspca_dev->queue_lock); |
2252 | init_waitqueue_head(&gspca_dev->wq); | |
2253 | ||
2254 | /* init video stuff */ | |
ba38ee8e | 2255 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
24441631 | 2256 | gspca_dev->vdev.parent = &intf->dev; |
5c4fa002 | 2257 | gspca_dev->module = module; |
ee56a4d3 | 2258 | gspca_dev->present = 1; |
a12ca6a6 | 2259 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2260 | VFL_TYPE_GRABBER, |
8d584a53 | 2261 | -1); |
63eb9546 JFM |
2262 | if (ret < 0) { |
2263 | err("video_register_device err %d", ret); | |
2264 | goto out; | |
2265 | } | |
2266 | ||
63eb9546 | 2267 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2268 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
0274d42e | 2269 | |
10ee2402 | 2270 | gspca_input_create_urb(gspca_dev); |
0274d42e | 2271 | |
63eb9546 JFM |
2272 | return 0; |
2273 | out: | |
f7628015 | 2274 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
10ee2402 HG |
2275 | if (gspca_dev->input_dev) |
2276 | input_unregister_device(gspca_dev->input_dev); | |
e7637521 | 2277 | #endif |
e07a1d8a JFM |
2278 | kfree(gspca_dev->usb_buf); |
2279 | kfree(gspca_dev); | |
63eb9546 JFM |
2280 | return ret; |
2281 | } | |
4462864d JFM |
2282 | EXPORT_SYMBOL(gspca_dev_probe2); |
2283 | ||
2284 | /* same function as the previous one, but check the interface */ | |
2285 | int gspca_dev_probe(struct usb_interface *intf, | |
2286 | const struct usb_device_id *id, | |
2287 | const struct sd_desc *sd_desc, | |
2288 | int dev_size, | |
2289 | struct module *module) | |
2290 | { | |
2291 | struct usb_device *dev = interface_to_usbdev(intf); | |
2292 | ||
2293 | /* we don't handle multi-config cameras */ | |
2294 | if (dev->descriptor.bNumConfigurations != 1) { | |
0b656321 | 2295 | err("%04x:%04x too many config", |
4462864d JFM |
2296 | id->idVendor, id->idProduct); |
2297 | return -ENODEV; | |
2298 | } | |
2299 | ||
2300 | /* the USB video interface must be the first one */ | |
2301 | if (dev->config->desc.bNumInterfaces != 1 | |
c4dc692c | 2302 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
4462864d | 2303 | return -ENODEV; |
4462864d JFM |
2304 | |
2305 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); | |
2306 | } | |
63eb9546 JFM |
2307 | EXPORT_SYMBOL(gspca_dev_probe); |
2308 | ||
2309 | /* | |
2310 | * USB disconnection | |
2311 | * | |
2312 | * This function must be called by the sub-driver | |
2313 | * when the device disconnects, after the specific resources are freed. | |
2314 | */ | |
2315 | void gspca_disconnect(struct usb_interface *intf) | |
2316 | { | |
4aa0d037 | 2317 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
f7628015 | 2318 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e | 2319 | struct input_dev *input_dev; |
e070bf9e | 2320 | #endif |
63eb9546 | 2321 | |
38c7c036 LP |
2322 | PDEBUG(D_PROBE, "%s disconnect", |
2323 | video_device_node_name(&gspca_dev->vdev)); | |
ad28127d | 2324 | mutex_lock(&gspca_dev->usb_lock); |
4e770f76 | 2325 | |
6e4ae872 | 2326 | gspca_dev->present = 0; |
4e770f76 | 2327 | wake_up_interruptible(&gspca_dev->wq); |
6e4ae872 | 2328 | |
4e770f76 | 2329 | destroy_urbs(gspca_dev); |
090264e5 | 2330 | |
f7628015 | 2331 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
2332 | gspca_input_destroy_urb(gspca_dev); |
2333 | input_dev = gspca_dev->input_dev; | |
2334 | if (input_dev) { | |
2335 | gspca_dev->input_dev = NULL; | |
2336 | input_unregister_device(input_dev); | |
2337 | } | |
e070bf9e | 2338 | #endif |
0274d42e | 2339 | |
090264e5 | 2340 | /* the device is freed at exit of this function */ |
ad28127d | 2341 | gspca_dev->dev = NULL; |
090264e5 JFM |
2342 | mutex_unlock(&gspca_dev->usb_lock); |
2343 | ||
6b060ffe FZ |
2344 | usb_set_intfdata(intf, NULL); |
2345 | ||
a12ca6a6 JFM |
2346 | /* release the device */ |
2347 | /* (this will call gspca_release() immediatly or on last close) */ | |
2348 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 2349 | |
0d07e240 | 2350 | /* PDEBUG(D_PROBE, "disconnect complete"); */ |
63eb9546 JFM |
2351 | } |
2352 | EXPORT_SYMBOL(gspca_disconnect); | |
2353 | ||
6a709749 JFM |
2354 | #ifdef CONFIG_PM |
2355 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2356 | { | |
2357 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2358 | ||
2359 | if (!gspca_dev->streaming) | |
2360 | return 0; | |
2361 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2362 | if (gspca_dev->sd_desc->stopN) |
2363 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 | 2364 | destroy_urbs(gspca_dev); |
0274d42e | 2365 | gspca_input_destroy_urb(gspca_dev); |
6a709749 | 2366 | gspca_set_alt0(gspca_dev); |
012d6b02 JFM |
2367 | if (gspca_dev->sd_desc->stop0) |
2368 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2369 | return 0; |
2370 | } | |
2371 | EXPORT_SYMBOL(gspca_suspend); | |
2372 | ||
2373 | int gspca_resume(struct usb_interface *intf) | |
2374 | { | |
2375 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2376 | ||
2377 | gspca_dev->frozen = 0; | |
012d6b02 | 2378 | gspca_dev->sd_desc->init(gspca_dev); |
0274d42e | 2379 | gspca_input_create_urb(gspca_dev); |
012d6b02 JFM |
2380 | if (gspca_dev->streaming) |
2381 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2382 | return 0; |
6a709749 JFM |
2383 | } |
2384 | EXPORT_SYMBOL(gspca_resume); | |
2385 | #endif | |
dcef3237 HG |
2386 | /* -- cam driver utility functions -- */ |
2387 | ||
2388 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2389 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2390 | ||
2391 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2392 | where changed. */ | |
2393 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2394 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2395 | { | |
2396 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2397 | const struct ctrl *gain_ctrl = NULL; | |
2398 | const struct ctrl *exposure_ctrl = NULL; | |
2399 | const struct ctrl *autogain_ctrl = NULL; | |
2400 | int retval = 0; | |
2401 | ||
2402 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
26984b09 HG |
2403 | if (gspca_dev->ctrl_dis & (1 << i)) |
2404 | continue; | |
dcef3237 HG |
2405 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) |
2406 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2407 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2408 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2409 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2410 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2411 | } | |
2412 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2413 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2414 | "on cam without (auto)gain/exposure"); | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2419 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2420 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2421 | return 0; | |
2422 | ||
2423 | orig_gain = gain; | |
2424 | orig_exposure = exposure; | |
2425 | ||
2426 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2427 | desired lumination fast (with the risc of a slight overshoot) */ | |
2428 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2429 | ||
1c44d81d | 2430 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2431 | avg_lum, desired_avg_lum, steps); |
2432 | ||
2433 | for (i = 0; i < steps; i++) { | |
2434 | if (avg_lum > desired_avg_lum) { | |
2435 | if (gain > gain_knee) | |
2436 | gain--; | |
2437 | else if (exposure > exposure_knee) | |
2438 | exposure--; | |
2439 | else if (gain > gain_ctrl->qctrl.default_value) | |
2440 | gain--; | |
2441 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2442 | exposure--; | |
2443 | else if (gain > gain_ctrl->qctrl.minimum) | |
2444 | gain--; | |
2445 | else | |
2446 | break; | |
2447 | } else { | |
2448 | if (gain < gain_ctrl->qctrl.default_value) | |
2449 | gain++; | |
2450 | else if (exposure < exposure_knee) | |
2451 | exposure++; | |
2452 | else if (gain < gain_knee) | |
2453 | gain++; | |
2454 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2455 | exposure++; | |
2456 | else if (gain < gain_ctrl->qctrl.maximum) | |
2457 | gain++; | |
2458 | else | |
2459 | break; | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | if (gain != orig_gain) { | |
2464 | gain_ctrl->set(gspca_dev, gain); | |
2465 | retval = 1; | |
2466 | } | |
2467 | if (exposure != orig_exposure) { | |
2468 | exposure_ctrl->set(gspca_dev, exposure); | |
2469 | retval = 1; | |
2470 | } | |
2471 | ||
2472 | return retval; | |
2473 | } | |
2474 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2475 | ||
63eb9546 JFM |
2476 | /* -- module insert / remove -- */ |
2477 | static int __init gspca_init(void) | |
2478 | { | |
54826437 | 2479 | info("v%d.%d.%d registered", |
bb64e86c JFM |
2480 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, |
2481 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2482 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2483 | return 0; |
2484 | } | |
2485 | static void __exit gspca_exit(void) | |
2486 | { | |
63eb9546 JFM |
2487 | } |
2488 | ||
2489 | module_init(gspca_init); | |
2490 | module_exit(gspca_exit); | |
2491 | ||
335b3f88 | 2492 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2493 | module_param_named(debug, gspca_debug, int, 0644); |
2494 | MODULE_PARM_DESC(debug, | |
2495 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2496 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2497 | " 0x0100: v4l2"); | |
6a7eba24 | 2498 | #endif |