Commit | Line | Data |
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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 | ||
30d4554a | 58 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 10, 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) | |
151 | PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret); | |
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) { | |
180 | PDEBUG(D_ERR, "Input device registration failed " | |
181 | "with error %i", err); | |
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 | gspca_dev->int_urb = urb; |
228 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
229 | if (ret < 0) { | |
c4dc692c | 230 | PDEBUG(D_ERR, "submit int URB failed with error %i", ret); |
0274d42e MN |
231 | goto error_submit; |
232 | } | |
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++) { | |
321 | ||
63eb9546 JFM |
322 | /* check the packet status and length */ |
323 | len = urb->iso_frame_desc[i].actual_length; | |
ff374747 JFM |
324 | if (len == 0) { |
325 | if (gspca_dev->empty_packet == 0) | |
326 | gspca_dev->empty_packet = 1; | |
6a7eba24 | 327 | continue; |
ff374747 | 328 | } |
63eb9546 JFM |
329 | st = urb->iso_frame_desc[i].status; |
330 | if (st) { | |
6a7eba24 JFM |
331 | PDEBUG(D_ERR, |
332 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
333 | i, len, st); |
334 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
335 | continue; | |
336 | } | |
63eb9546 JFM |
337 | |
338 | /* let the packet be analyzed by the subdriver */ | |
339 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
340 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 341 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 342 | + urb->iso_frame_desc[i].offset; |
76dd272b | 343 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
344 | } |
345 | ||
bf926adf | 346 | resubmit: |
63eb9546 | 347 | /* resubmit the URB */ |
63eb9546 JFM |
348 | st = usb_submit_urb(urb, GFP_ATOMIC); |
349 | if (st < 0) | |
350 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
351 | } | |
352 | ||
d43fa32f JFM |
353 | /* |
354 | * ISOC message interrupt from the USB device | |
355 | * | |
ac0d6df6 | 356 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 357 | */ |
8d584a53 | 358 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
359 | { |
360 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
361 | ||
3647fea8 | 362 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
363 | if (!gspca_dev->streaming) |
364 | return; | |
365 | fill_frame(gspca_dev, urb); | |
366 | } | |
367 | ||
0be01004 JFM |
368 | /* |
369 | * bulk message interrupt from the USB device | |
370 | */ | |
8d584a53 | 371 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
372 | { |
373 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 374 | int st; |
0be01004 JFM |
375 | |
376 | PDEBUG(D_PACK, "bulk irq"); | |
377 | if (!gspca_dev->streaming) | |
378 | return; | |
880ae24d JFM |
379 | switch (urb->status) { |
380 | case 0: | |
381 | break; | |
090264e5 JFM |
382 | case -ESHUTDOWN: |
383 | return; /* disconnection */ | |
880ae24d | 384 | default: |
0be01004 | 385 | #ifdef CONFIG_PM |
6a540bdf HG |
386 | if (gspca_dev->frozen) |
387 | return; | |
0be01004 | 388 | #endif |
6a540bdf | 389 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 390 | urb->status = 0; |
bf926adf | 391 | goto resubmit; |
0be01004 JFM |
392 | } |
393 | ||
d131c3c9 JFM |
394 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
395 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
396 | urb->transfer_buffer, |
397 | urb->actual_length); | |
dff369aa | 398 | |
bf926adf | 399 | resubmit: |
dff369aa AO |
400 | /* resubmit the URB */ |
401 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
402 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
403 | if (st < 0) | |
404 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
405 | } | |
0be01004 JFM |
406 | } |
407 | ||
63eb9546 JFM |
408 | /* |
409 | * add data to the current frame | |
410 | * | |
ac0d6df6 JFM |
411 | * This function is called by the subdrivers at interrupt level. |
412 | * | |
63eb9546 JFM |
413 | * To build a frame, these ones must add |
414 | * - one FIRST_PACKET | |
415 | * - 0 or many INTER_PACKETs | |
416 | * - one LAST_PACKET | |
417 | * DISCARD_PACKET invalidates the whole frame. | |
418 | * On LAST_PACKET, a new frame is returned. | |
419 | */ | |
76dd272b JFM |
420 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
421 | enum gspca_packet_type packet_type, | |
422 | const u8 *data, | |
423 | int len) | |
63eb9546 | 424 | { |
3ec342f2 | 425 | struct gspca_frame *frame; |
63eb9546 JFM |
426 | int i, j; |
427 | ||
e2997a72 | 428 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 | 429 | |
63eb9546 | 430 | if (packet_type == FIRST_PACKET) { |
f7059eaa JFM |
431 | i = atomic_read(&gspca_dev->fr_i); |
432 | ||
433 | /* if there are no queued buffer, discard the whole frame */ | |
434 | if (i == atomic_read(&gspca_dev->fr_q)) { | |
435 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
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()); |
63eb9546 | 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 | ||
63eb9546 | 511 | static int frame_alloc(struct gspca_dev *gspca_dev, |
d43fa32f | 512 | 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); |
63eb9546 | 522 | gspca_dev->frsz = frsz; |
f7059eaa JFM |
523 | if (count >= GSPCA_MAX_FRAMES) |
524 | count = GSPCA_MAX_FRAMES - 1; | |
e795d912 | 525 | gspca_dev->frbuf = vmalloc_32(frsz * count); |
ac0d6df6 JFM |
526 | if (!gspca_dev->frbuf) { |
527 | err("frame alloc failed"); | |
528 | return -ENOMEM; | |
63eb9546 JFM |
529 | } |
530 | gspca_dev->nframes = count; | |
531 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
532 | frame = &gspca_dev->frame[i]; |
533 | frame->v4l2_buf.index = i; | |
534 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
535 | frame->v4l2_buf.flags = 0; | |
536 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
537 | frame->v4l2_buf.length = frsz; | |
538 | frame->v4l2_buf.memory = gspca_dev->memory; | |
539 | frame->v4l2_buf.sequence = 0; | |
b192ca98 | 540 | frame->data = gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 541 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 | 542 | } |
f7059eaa JFM |
543 | atomic_set(&gspca_dev->fr_q, 0); |
544 | atomic_set(&gspca_dev->fr_i, 0); | |
545 | gspca_dev->fr_o = 0; | |
d43fa32f | 546 | return 0; |
63eb9546 JFM |
547 | } |
548 | ||
549 | static void frame_free(struct gspca_dev *gspca_dev) | |
550 | { | |
551 | int i; | |
552 | ||
553 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 554 | if (gspca_dev->frbuf != NULL) { |
e795d912 | 555 | vfree(gspca_dev->frbuf); |
63eb9546 JFM |
556 | gspca_dev->frbuf = NULL; |
557 | for (i = 0; i < gspca_dev->nframes; i++) | |
558 | gspca_dev->frame[i].data = NULL; | |
559 | } | |
560 | gspca_dev->nframes = 0; | |
561 | } | |
562 | ||
d43fa32f | 563 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
564 | { |
565 | struct urb *urb; | |
566 | unsigned int i; | |
567 | ||
568 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 569 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 570 | urb = gspca_dev->urb[i]; |
63eb9546 | 571 | if (urb == NULL) |
d43fa32f | 572 | break; |
63eb9546 | 573 | |
4aa0d037 | 574 | gspca_dev->urb[i] = NULL; |
090264e5 | 575 | usb_kill_urb(urb); |
efab8211 | 576 | if (urb->transfer_buffer != NULL) |
997ea58e DM |
577 | usb_free_coherent(gspca_dev->dev, |
578 | urb->transfer_buffer_length, | |
579 | urb->transfer_buffer, | |
580 | urb->transfer_dma); | |
63eb9546 JFM |
581 | usb_free_urb(urb); |
582 | } | |
63eb9546 JFM |
583 | } |
584 | ||
e4dac289 JFM |
585 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
586 | { | |
587 | int ret; | |
588 | ||
589 | if (gspca_dev->alt == 0) | |
590 | return 0; | |
591 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
592 | if (ret < 0) | |
593 | PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret); | |
594 | return ret; | |
595 | } | |
596 | ||
597 | /* Note: both the queue and the usb locks should be held when calling this */ | |
598 | static void gspca_stream_off(struct gspca_dev *gspca_dev) | |
599 | { | |
600 | gspca_dev->streaming = 0; | |
601 | if (gspca_dev->present) { | |
602 | if (gspca_dev->sd_desc->stopN) | |
603 | gspca_dev->sd_desc->stopN(gspca_dev); | |
604 | destroy_urbs(gspca_dev); | |
605 | gspca_input_destroy_urb(gspca_dev); | |
606 | gspca_set_alt0(gspca_dev); | |
607 | gspca_input_create_urb(gspca_dev); | |
608 | } | |
609 | ||
610 | /* always call stop0 to free the subdriver's resources */ | |
611 | if (gspca_dev->sd_desc->stop0) | |
612 | gspca_dev->sd_desc->stop0(gspca_dev); | |
613 | PDEBUG(D_STREAM, "stream off OK"); | |
614 | } | |
615 | ||
63eb9546 | 616 | /* |
219423c1 | 617 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 618 | */ |
0be01004 | 619 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
6929dc6b | 620 | int xfer) |
63eb9546 JFM |
621 | { |
622 | struct usb_host_endpoint *ep; | |
623 | int i, attr; | |
624 | ||
63eb9546 JFM |
625 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
626 | ep = &alt->endpoint[i]; | |
50e06dee | 627 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 JFM |
628 | if (attr == xfer |
629 | && ep->desc.wMaxPacketSize != 0) | |
50e06dee | 630 | return ep; |
63eb9546 JFM |
631 | } |
632 | return NULL; | |
633 | } | |
634 | ||
635 | /* | |
219423c1 | 636 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
637 | * |
638 | * The endpoint is defined by the subdriver. | |
639 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
640 | * This routine may be called many times when the bandwidth is too small | |
641 | * (the bandwidth is checked on urb submit). | |
642 | */ | |
0be01004 | 643 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
644 | { |
645 | struct usb_interface *intf; | |
646 | struct usb_host_endpoint *ep; | |
6929dc6b | 647 | int xfer, i, ret; |
63eb9546 JFM |
648 | |
649 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 650 | ep = NULL; |
6929dc6b JFM |
651 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
652 | : USB_ENDPOINT_XFER_ISOC; | |
63eb9546 | 653 | i = gspca_dev->alt; /* previous alt setting */ |
a511ba94 | 654 | if (gspca_dev->cam.reverse_alts) { |
35680baa JFM |
655 | if (gspca_dev->audio) |
656 | i++; | |
a511ba94 HG |
657 | while (++i < gspca_dev->nbalt) { |
658 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
659 | if (ep) | |
660 | break; | |
661 | } | |
662 | } else { | |
35680baa JFM |
663 | if (gspca_dev->audio) |
664 | i--; | |
a511ba94 HG |
665 | while (--i >= 0) { |
666 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
667 | if (ep) | |
668 | break; | |
669 | } | |
63eb9546 | 670 | } |
6a7eba24 | 671 | if (ep == NULL) { |
6929dc6b JFM |
672 | err("no transfer endpoint found"); |
673 | return NULL; | |
63eb9546 | 674 | } |
0be01004 | 675 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 676 | i, ep->desc.bEndpointAddress); |
1c8336d3 | 677 | gspca_dev->alt = i; /* memorize the current alt setting */ |
8dd07ef1 | 678 | if (gspca_dev->nbalt > 1) { |
0274d42e | 679 | gspca_input_destroy_urb(gspca_dev); |
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 | } |
0274d42e | 685 | gspca_input_create_urb(gspca_dev); |
63eb9546 | 686 | } |
63eb9546 JFM |
687 | return ep; |
688 | } | |
689 | ||
690 | /* | |
0be01004 | 691 | * create the URBs for image transfer |
63eb9546 JFM |
692 | */ |
693 | static int create_urbs(struct gspca_dev *gspca_dev, | |
694 | struct usb_host_endpoint *ep) | |
695 | { | |
696 | struct urb *urb; | |
d43fa32f | 697 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
698 | |
699 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 700 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 701 | |
6929dc6b | 702 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
703 | |
704 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
705 | if (gspca_dev->pkt_size == 0) |
706 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
707 | else | |
708 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
709 | npkt = gspca_dev->cam.npkt; |
710 | if (npkt == 0) | |
711 | npkt = 32; /* default value */ | |
0be01004 JFM |
712 | bsize = psize * npkt; |
713 | PDEBUG(D_STREAM, | |
714 | "isoc %d pkts size %d = bsize:%d", | |
715 | npkt, psize, bsize); | |
51977a8d | 716 | nurbs = DEF_NURBS; |
95d9142c | 717 | } else { /* bulk */ |
0be01004 | 718 | npkt = 0; |
dff369aa | 719 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
720 | if (bsize == 0) |
721 | bsize = psize; | |
0be01004 | 722 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
723 | if (gspca_dev->cam.bulk_nurbs != 0) |
724 | nurbs = gspca_dev->cam.bulk_nurbs; | |
725 | else | |
726 | nurbs = 1; | |
0be01004 JFM |
727 | } |
728 | ||
d43fa32f | 729 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
730 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
731 | if (!urb) { | |
732 | err("usb_alloc_urb failed"); | |
733 | return -ENOMEM; | |
734 | } | |
db870875 | 735 | gspca_dev->urb[n] = urb; |
997ea58e | 736 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
63eb9546 JFM |
737 | bsize, |
738 | GFP_KERNEL, | |
739 | &urb->transfer_dma); | |
740 | ||
4aa0d037 | 741 | if (urb->transfer_buffer == NULL) { |
997ea58e | 742 | err("usb_alloc_coherent failed"); |
63eb9546 JFM |
743 | return -ENOMEM; |
744 | } | |
63eb9546 JFM |
745 | urb->dev = gspca_dev->dev; |
746 | urb->context = gspca_dev; | |
63eb9546 | 747 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
748 | if (npkt != 0) { /* ISOC */ |
749 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
750 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
751 | urb->transfer_flags = URB_ISO_ASAP |
752 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
753 | urb->interval = ep->desc.bInterval; |
754 | urb->complete = isoc_irq; | |
755 | urb->number_of_packets = npkt; | |
756 | for (i = 0; i < npkt; i++) { | |
757 | urb->iso_frame_desc[i].length = psize; | |
758 | urb->iso_frame_desc[i].offset = psize * i; | |
759 | } | |
760 | } else { /* bulk */ | |
761 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
762 | ep->desc.bEndpointAddress), | |
6c49da7f | 763 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 764 | urb->complete = bulk_irq; |
63eb9546 JFM |
765 | } |
766 | } | |
767 | return 0; | |
768 | } | |
769 | ||
770 | /* | |
771 | * start the USB transfer | |
772 | */ | |
773 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
774 | { | |
63eb9546 | 775 | struct usb_host_endpoint *ep; |
db870875 | 776 | struct urb *urb; |
63eb9546 JFM |
777 | int n, ret; |
778 | ||
e2997a72 HG |
779 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
780 | return -ERESTARTSYS; | |
63eb9546 | 781 | |
090264e5 JFM |
782 | if (!gspca_dev->present) { |
783 | ret = -ENODEV; | |
784 | goto out; | |
785 | } | |
786 | ||
f7059eaa JFM |
787 | /* reset the streaming variables */ |
788 | gspca_dev->image = NULL; | |
789 | gspca_dev->image_len = 0; | |
790 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
791 | gspca_dev->sequence = 0; | |
792 | ||
ab6c8cf2 JFM |
793 | gspca_dev->usb_err = 0; |
794 | ||
d43fa32f JFM |
795 | /* set the higher alternate setting and |
796 | * loop until urb submit succeeds */ | |
a511ba94 HG |
797 | if (gspca_dev->cam.reverse_alts) |
798 | gspca_dev->alt = 0; | |
799 | else | |
800 | gspca_dev->alt = gspca_dev->nbalt; | |
801 | ||
1f53b0b0 JFM |
802 | if (gspca_dev->sd_desc->isoc_init) { |
803 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
804 | if (ret < 0) | |
805 | goto out; | |
806 | } | |
807 | ep = get_ep(gspca_dev); | |
808 | if (ep == NULL) { | |
809 | ret = -EIO; | |
810 | goto out; | |
811 | } | |
63eb9546 | 812 | for (;;) { |
47aaca96 JFM |
813 | if (!gspca_dev->cam.no_urb_create) { |
814 | PDEBUG(D_STREAM, "init transfer alt %d", | |
815 | gspca_dev->alt); | |
816 | ret = create_urbs(gspca_dev, ep); | |
817 | if (ret < 0) { | |
818 | destroy_urbs(gspca_dev); | |
819 | goto out; | |
820 | } | |
db870875 | 821 | } |
63eb9546 | 822 | |
8fe2f1d5 | 823 | /* clear the bulk endpoint */ |
6929dc6b | 824 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 825 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 826 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 827 | |
63eb9546 | 828 | /* start the cam */ |
72ab97ce JFM |
829 | ret = gspca_dev->sd_desc->start(gspca_dev); |
830 | if (ret < 0) { | |
831 | destroy_urbs(gspca_dev); | |
832 | goto out; | |
833 | } | |
63eb9546 | 834 | gspca_dev->streaming = 1; |
63eb9546 | 835 | |
dff369aa | 836 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 837 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
838 | break; |
839 | ||
63eb9546 | 840 | /* submit the URBs */ |
db870875 JFM |
841 | for (n = 0; n < MAX_NURBS; n++) { |
842 | urb = gspca_dev->urb[n]; | |
843 | if (urb == NULL) | |
844 | break; | |
845 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
846 | if (ret < 0) |
847 | break; | |
63eb9546 JFM |
848 | } |
849 | if (ret >= 0) | |
850 | break; | |
e4dac289 | 851 | gspca_stream_off(gspca_dev); |
4bdf4a83 JFM |
852 | if (ret != -ENOSPC) { |
853 | PDEBUG(D_ERR|D_STREAM, | |
854 | "usb_submit_urb alt %d err %d", | |
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: | |
877 | mutex_unlock(&gspca_dev->usb_lock); | |
878 | return ret; | |
879 | } | |
880 | ||
d43fa32f | 881 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
882 | { |
883 | int i; | |
884 | ||
885 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
886 | gspca_dev->curr_mode = i; | |
887 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
888 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 889 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
890 | } |
891 | ||
892 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
893 | int width, int height) | |
894 | { | |
895 | int i; | |
896 | ||
d43fa32f JFM |
897 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
898 | if (width >= gspca_dev->cam.cam_mode[i].width | |
899 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
900 | break; |
901 | } | |
63eb9546 JFM |
902 | return i; |
903 | } | |
904 | ||
63eb9546 JFM |
905 | /* |
906 | * search a mode with the right pixel format | |
907 | */ | |
908 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
909 | int mode, | |
910 | int pixfmt) | |
911 | { | |
912 | int modeU, modeD; | |
913 | ||
914 | modeU = modeD = mode; | |
915 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
916 | if (--modeD >= 0) { | |
c2446b3e JFM |
917 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
918 | == pixfmt) | |
63eb9546 JFM |
919 | return modeD; |
920 | } | |
921 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
922 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
923 | == pixfmt) | |
63eb9546 JFM |
924 | return modeU; |
925 | } | |
926 | } | |
927 | return -EINVAL; | |
928 | } | |
929 | ||
af1d9afa BJ |
930 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
931 | static int vidioc_g_register(struct file *file, void *priv, | |
932 | struct v4l2_dbg_register *reg) | |
933 | { | |
934 | int ret; | |
935 | struct gspca_dev *gspca_dev = priv; | |
936 | ||
937 | if (!gspca_dev->sd_desc->get_chip_ident) | |
938 | return -EINVAL; | |
939 | ||
940 | if (!gspca_dev->sd_desc->get_register) | |
941 | return -EINVAL; | |
942 | ||
943 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
944 | return -ERESTARTSYS; | |
8c4ebae4 | 945 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
946 | if (gspca_dev->present) |
947 | ret = gspca_dev->sd_desc->get_register(gspca_dev, reg); | |
948 | else | |
949 | ret = -ENODEV; | |
950 | mutex_unlock(&gspca_dev->usb_lock); | |
951 | ||
952 | return ret; | |
953 | } | |
954 | ||
955 | static int vidioc_s_register(struct file *file, void *priv, | |
956 | struct v4l2_dbg_register *reg) | |
957 | { | |
958 | int ret; | |
959 | struct gspca_dev *gspca_dev = priv; | |
960 | ||
961 | if (!gspca_dev->sd_desc->get_chip_ident) | |
962 | return -EINVAL; | |
963 | ||
964 | if (!gspca_dev->sd_desc->set_register) | |
965 | return -EINVAL; | |
966 | ||
967 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
968 | return -ERESTARTSYS; | |
8c4ebae4 | 969 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
970 | if (gspca_dev->present) |
971 | ret = gspca_dev->sd_desc->set_register(gspca_dev, reg); | |
972 | else | |
973 | ret = -ENODEV; | |
974 | mutex_unlock(&gspca_dev->usb_lock); | |
975 | ||
976 | return ret; | |
977 | } | |
978 | #endif | |
979 | ||
980 | static int vidioc_g_chip_ident(struct file *file, void *priv, | |
981 | struct v4l2_dbg_chip_ident *chip) | |
982 | { | |
983 | int ret; | |
984 | struct gspca_dev *gspca_dev = priv; | |
985 | ||
986 | if (!gspca_dev->sd_desc->get_chip_ident) | |
987 | return -EINVAL; | |
988 | ||
989 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
990 | return -ERESTARTSYS; | |
8c4ebae4 | 991 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
992 | if (gspca_dev->present) |
993 | ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip); | |
994 | else | |
995 | ret = -ENODEV; | |
996 | mutex_unlock(&gspca_dev->usb_lock); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | ||
e078770a | 1001 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1002 | struct v4l2_fmtdesc *fmtdesc) |
1003 | { | |
1004 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 1005 | int i, j, index; |
63eb9546 JFM |
1006 | __u32 fmt_tb[8]; |
1007 | ||
63eb9546 JFM |
1008 | /* give an index to each format */ |
1009 | index = 0; | |
1010 | j = 0; | |
1011 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 1012 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
1013 | j = 0; |
1014 | for (;;) { | |
1015 | if (fmt_tb[j] == fmt_tb[index]) | |
1016 | break; | |
1017 | j++; | |
1018 | } | |
1019 | if (j == index) { | |
1020 | if (fmtdesc->index == index) | |
1021 | break; /* new format */ | |
1022 | index++; | |
80297125 | 1023 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
1024 | return -EINVAL; |
1025 | } | |
1026 | } | |
1027 | if (i < 0) | |
1028 | return -EINVAL; /* no more format */ | |
1029 | ||
63eb9546 JFM |
1030 | fmtdesc->pixelformat = fmt_tb[index]; |
1031 | if (gspca_is_compressed(fmt_tb[index])) | |
1032 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
1033 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
1034 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
1035 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
1036 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
1037 | fmtdesc->description[4] = '\0'; | |
1038 | return 0; | |
1039 | } | |
1040 | ||
e078770a | 1041 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1042 | struct v4l2_format *fmt) |
1043 | { | |
1044 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 1045 | int mode; |
63eb9546 | 1046 | |
c2446b3e JFM |
1047 | mode = gspca_dev->curr_mode; |
1048 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
1049 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1050 | return 0; |
1051 | } | |
1052 | ||
e078770a | 1053 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1054 | struct v4l2_format *fmt) |
1055 | { | |
24c530b4 | 1056 | int w, h, mode, mode2; |
63eb9546 | 1057 | |
4aa0d037 JFM |
1058 | w = fmt->fmt.pix.width; |
1059 | h = fmt->fmt.pix.height; | |
d43fa32f | 1060 | |
335b3f88 | 1061 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1062 | if (gspca_debug & D_CONF) |
1063 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
1064 | #endif | |
1065 | /* search the closest mode for width and height */ | |
1066 | mode = wxh_to_mode(gspca_dev, w, h); | |
1067 | ||
1068 | /* OK if right palette */ | |
c2446b3e JFM |
1069 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1070 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
1071 | |
1072 | /* else, search the closest mode with the same pixel format */ | |
1073 | mode2 = gspca_get_mode(gspca_dev, mode, | |
1074 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 1075 | if (mode2 >= 0) |
63eb9546 | 1076 | mode = mode2; |
c2446b3e JFM |
1077 | /* else |
1078 | ; * no chance, return this mode */ | |
63eb9546 | 1079 | } |
c2446b3e JFM |
1080 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
1081 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1082 | return mode; /* used when s_fmt */ |
1083 | } | |
1084 | ||
e078770a | 1085 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
1086 | void *priv, |
1087 | struct v4l2_format *fmt) | |
1088 | { | |
4aa0d037 | 1089 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
1090 | int ret; |
1091 | ||
e078770a | 1092 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1093 | if (ret < 0) |
1094 | return ret; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
e078770a | 1098 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1099 | struct v4l2_format *fmt) |
1100 | { | |
1101 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1102 | int ret; |
63eb9546 | 1103 | |
e2997a72 HG |
1104 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1105 | return -ERESTARTSYS; | |
d43fa32f | 1106 | |
e078770a | 1107 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1108 | if (ret < 0) |
1109 | goto out; | |
1110 | ||
d43fa32f JFM |
1111 | if (gspca_dev->nframes != 0 |
1112 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
1113 | ret = -EINVAL; | |
1114 | goto out; | |
1115 | } | |
1116 | ||
50a871fe JFM |
1117 | if (ret == gspca_dev->curr_mode) { |
1118 | ret = 0; | |
63eb9546 | 1119 | goto out; /* same mode */ |
50a871fe | 1120 | } |
d43fa32f JFM |
1121 | |
1122 | if (gspca_dev->streaming) { | |
1123 | ret = -EBUSY; | |
1124 | goto out; | |
e2997a72 | 1125 | } |
4aa0d037 JFM |
1126 | gspca_dev->width = fmt->fmt.pix.width; |
1127 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
1128 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
1129 | gspca_dev->curr_mode = ret; | |
d43fa32f | 1130 | |
d43fa32f | 1131 | ret = 0; |
63eb9546 JFM |
1132 | out: |
1133 | mutex_unlock(&gspca_dev->queue_lock); | |
1134 | return ret; | |
1135 | } | |
1136 | ||
11c635a2 HG |
1137 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1138 | struct v4l2_frmsizeenum *fsize) | |
1139 | { | |
1140 | struct gspca_dev *gspca_dev = priv; | |
1141 | int i; | |
1142 | __u32 index = 0; | |
1143 | ||
1144 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
1145 | if (fsize->pixel_format != | |
1146 | gspca_dev->cam.cam_mode[i].pixelformat) | |
1147 | continue; | |
1148 | ||
1149 | if (fsize->index == index) { | |
1150 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1151 | fsize->discrete.width = | |
1152 | gspca_dev->cam.cam_mode[i].width; | |
1153 | fsize->discrete.height = | |
1154 | gspca_dev->cam.cam_mode[i].height; | |
1155 | return 0; | |
1156 | } | |
1157 | index++; | |
1158 | } | |
1159 | ||
1160 | return -EINVAL; | |
1161 | } | |
1162 | ||
28ffe77f AO |
1163 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1164 | struct v4l2_frmivalenum *fival) | |
1165 | { | |
1166 | struct gspca_dev *gspca_dev = priv; | |
1167 | int mode = wxh_to_mode(gspca_dev, fival->width, fival->height); | |
1168 | __u32 i; | |
1169 | ||
1170 | if (gspca_dev->cam.mode_framerates == NULL || | |
1171 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
1172 | return -EINVAL; | |
1173 | ||
1174 | if (fival->pixel_format != | |
1175 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1179 | if (fival->index == i) { | |
1180 | fival->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1181 | fival->discrete.numerator = 1; | |
1182 | fival->discrete.denominator = | |
1183 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1184 | return 0; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | return -EINVAL; | |
1189 | } | |
1190 | ||
d0182306 | 1191 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 1192 | { |
d0182306 | 1193 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 1194 | |
38c7c036 LP |
1195 | PDEBUG(D_PROBE, "%s released", |
1196 | video_device_node_name(&gspca_dev->vdev)); | |
6b060ffe FZ |
1197 | |
1198 | kfree(gspca_dev->usb_buf); | |
1199 | kfree(gspca_dev); | |
1200 | } | |
1201 | ||
bec43661 | 1202 | static int dev_open(struct file *file) |
63eb9546 JFM |
1203 | { |
1204 | struct gspca_dev *gspca_dev; | |
1205 | int ret; | |
1206 | ||
0d07e240 | 1207 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
a12ca6a6 | 1208 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
1209 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1210 | return -ERESTARTSYS; | |
63eb9546 JFM |
1211 | if (!gspca_dev->present) { |
1212 | ret = -ENODEV; | |
1213 | goto out; | |
1214 | } | |
1215 | ||
012d6b02 | 1216 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
1217 | ret = -EBUSY; |
1218 | goto out; | |
1219 | } | |
5c4fa002 JFM |
1220 | |
1221 | /* protect the subdriver against rmmod */ | |
1222 | if (!try_module_get(gspca_dev->module)) { | |
1223 | ret = -ENODEV; | |
1224 | goto out; | |
1225 | } | |
1226 | ||
63eb9546 | 1227 | gspca_dev->users++; |
6b060ffe | 1228 | |
63eb9546 | 1229 | file->private_data = gspca_dev; |
335b3f88 | 1230 | #ifdef GSPCA_DEBUG |
63eb9546 | 1231 | /* activate the v4l2 debug */ |
d43fa32f | 1232 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 1233 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 1234 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 1235 | else |
a12ca6a6 | 1236 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 1237 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 1238 | #endif |
012d6b02 | 1239 | ret = 0; |
63eb9546 JFM |
1240 | out: |
1241 | mutex_unlock(&gspca_dev->queue_lock); | |
1242 | if (ret != 0) | |
1243 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
1244 | else | |
d43fa32f | 1245 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
1246 | return ret; |
1247 | } | |
1248 | ||
bec43661 | 1249 | static int dev_close(struct file *file) |
63eb9546 JFM |
1250 | { |
1251 | struct gspca_dev *gspca_dev = file->private_data; | |
1252 | ||
0d07e240 | 1253 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
e2997a72 HG |
1254 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1255 | return -ERESTARTSYS; | |
1256 | gspca_dev->users--; | |
e2997a72 | 1257 | |
5b77ae77 | 1258 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1259 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
1260 | if (gspca_dev->streaming) { |
1261 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1262 | gspca_dev->usb_err = 0; |
a1e8288b JFM |
1263 | gspca_stream_off(gspca_dev); |
1264 | mutex_unlock(&gspca_dev->usb_lock); | |
1265 | } | |
4aa0d037 | 1266 | frame_free(gspca_dev); |
efab8211 | 1267 | gspca_dev->capt_file = NULL; |
d43fa32f | 1268 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 1269 | } |
d43fa32f | 1270 | file->private_data = NULL; |
5c4fa002 | 1271 | module_put(gspca_dev->module); |
63eb9546 | 1272 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1273 | |
d43fa32f | 1274 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1275 | |
63eb9546 JFM |
1276 | return 0; |
1277 | } | |
1278 | ||
1279 | static int vidioc_querycap(struct file *file, void *priv, | |
1280 | struct v4l2_capability *cap) | |
1281 | { | |
1282 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 1283 | int ret; |
63eb9546 | 1284 | |
090264e5 JFM |
1285 | /* protect the access to the usb device */ |
1286 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1287 | return -ERESTARTSYS; | |
1288 | if (!gspca_dev->present) { | |
1289 | ret = -ENODEV; | |
1290 | goto out; | |
1291 | } | |
63eb9546 | 1292 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); |
c6edaf16 JFM |
1293 | if (gspca_dev->dev->product != NULL) { |
1294 | strncpy(cap->card, gspca_dev->dev->product, | |
1295 | sizeof cap->card); | |
1296 | } else { | |
1297 | snprintf(cap->card, sizeof cap->card, | |
1298 | "USB Camera (%04x:%04x)", | |
1299 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1300 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1301 | } | |
5932028f | 1302 | usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info)); |
63eb9546 JFM |
1303 | cap->version = DRIVER_VERSION_NUMBER; |
1304 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
1305 | | V4L2_CAP_STREAMING | |
1306 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
1307 | ret = 0; |
1308 | out: | |
1309 | mutex_unlock(&gspca_dev->usb_lock); | |
1310 | return ret; | |
63eb9546 JFM |
1311 | } |
1312 | ||
a0001a28 HG |
1313 | static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev, |
1314 | int id) | |
1315 | { | |
1316 | const struct ctrl *ctrls; | |
1317 | int i; | |
1318 | ||
1319 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1320 | i < gspca_dev->sd_desc->nctrls; | |
1321 | i++, ctrls++) { | |
1322 | if (gspca_dev->ctrl_dis & (1 << i)) | |
1323 | continue; | |
1324 | if (id == ctrls->qctrl.id) | |
1325 | return ctrls; | |
1326 | } | |
1327 | return NULL; | |
1328 | } | |
1329 | ||
63eb9546 JFM |
1330 | static int vidioc_queryctrl(struct file *file, void *priv, |
1331 | struct v4l2_queryctrl *q_ctrl) | |
1332 | { | |
1333 | struct gspca_dev *gspca_dev = priv; | |
a0001a28 HG |
1334 | const struct ctrl *ctrls; |
1335 | int i; | |
6a7eba24 JFM |
1336 | u32 id; |
1337 | ||
a0001a28 | 1338 | ctrls = NULL; |
6a7eba24 JFM |
1339 | id = q_ctrl->id; |
1340 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1341 | id &= V4L2_CTRL_ID_MASK; | |
1342 | id++; | |
1343 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
a0001a28 | 1344 | if (gspca_dev->ctrl_dis & (1 << i)) |
f50ba1be | 1345 | continue; |
b8bfb5fb | 1346 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be | 1347 | continue; |
b8bfb5fb | 1348 | if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id |
a0001a28 | 1349 | > ctrls->qctrl.id) |
b8bfb5fb | 1350 | continue; |
a0001a28 | 1351 | ctrls = &gspca_dev->sd_desc->ctrls[i]; |
63eb9546 | 1352 | } |
83955556 JFM |
1353 | if (ctrls == NULL) |
1354 | return -EINVAL; | |
a0001a28 HG |
1355 | } else { |
1356 | ctrls = get_ctrl(gspca_dev, id); | |
83955556 JFM |
1357 | if (ctrls == NULL) |
1358 | return -EINVAL; | |
4af85668 | 1359 | i = ctrls - gspca_dev->sd_desc->ctrls; |
63eb9546 | 1360 | } |
a0001a28 | 1361 | memcpy(q_ctrl, ctrls, sizeof *q_ctrl); |
4af85668 JFM |
1362 | if (gspca_dev->ctrl_inac & (1 << i)) |
1363 | q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
f50ba1be | 1364 | return 0; |
63eb9546 JFM |
1365 | } |
1366 | ||
1367 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1368 | struct v4l2_control *ctrl) | |
1369 | { | |
1370 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1371 | const struct ctrl *ctrls; |
a0001a28 | 1372 | int ret; |
63eb9546 | 1373 | |
a0001a28 HG |
1374 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1375 | if (ctrls == NULL) | |
1376 | return -EINVAL; | |
1377 | ||
1378 | if (ctrl->value < ctrls->qctrl.minimum | |
1379 | || ctrl->value > ctrls->qctrl.maximum) | |
1380 | return -ERANGE; | |
1381 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
1382 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1383 | return -ERESTARTSYS; | |
8c4ebae4 | 1384 | gspca_dev->usb_err = 0; |
a0001a28 HG |
1385 | if (gspca_dev->present) |
1386 | ret = ctrls->set(gspca_dev, ctrl->value); | |
1387 | else | |
1388 | ret = -ENODEV; | |
1389 | mutex_unlock(&gspca_dev->usb_lock); | |
1390 | return ret; | |
63eb9546 JFM |
1391 | } |
1392 | ||
1393 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1394 | struct v4l2_control *ctrl) | |
1395 | { | |
1396 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1397 | const struct ctrl *ctrls; |
a0001a28 | 1398 | int ret; |
63eb9546 | 1399 | |
a0001a28 HG |
1400 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1401 | if (ctrls == NULL) | |
1402 | return -EINVAL; | |
1403 | ||
1404 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1405 | return -ERESTARTSYS; | |
8c4ebae4 | 1406 | gspca_dev->usb_err = 0; |
a0001a28 HG |
1407 | if (gspca_dev->present) |
1408 | ret = ctrls->get(gspca_dev, &ctrl->value); | |
1409 | else | |
1410 | ret = -ENODEV; | |
1411 | mutex_unlock(&gspca_dev->usb_lock); | |
1412 | return ret; | |
63eb9546 JFM |
1413 | } |
1414 | ||
1415 | static int vidioc_querymenu(struct file *file, void *priv, | |
1416 | struct v4l2_querymenu *qmenu) | |
1417 | { | |
1418 | struct gspca_dev *gspca_dev = priv; | |
1419 | ||
1420 | if (!gspca_dev->sd_desc->querymenu) | |
1421 | return -EINVAL; | |
1422 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1423 | } | |
1424 | ||
1425 | static int vidioc_enum_input(struct file *file, void *priv, | |
1426 | struct v4l2_input *input) | |
1427 | { | |
1428 | struct gspca_dev *gspca_dev = priv; | |
1429 | ||
1430 | if (input->index != 0) | |
1431 | return -EINVAL; | |
63eb9546 | 1432 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1433 | input->status = gspca_dev->cam.input_flags; |
63eb9546 JFM |
1434 | strncpy(input->name, gspca_dev->sd_desc->name, |
1435 | sizeof input->name); | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1440 | { | |
1441 | *i = 0; | |
1442 | return 0; | |
1443 | } | |
1444 | ||
1445 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1446 | { | |
1447 | if (i > 0) | |
1448 | return -EINVAL; | |
1449 | return (0); | |
1450 | } | |
1451 | ||
1452 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1453 | struct v4l2_requestbuffers *rb) | |
1454 | { | |
1455 | struct gspca_dev *gspca_dev = priv; | |
832d0a91 | 1456 | int i, ret = 0, streaming; |
63eb9546 | 1457 | |
a2ba6f27 JFM |
1458 | i = rb->memory; /* (avoid compilation warning) */ |
1459 | switch (i) { | |
5b77ae77 | 1460 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1461 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1462 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1463 | break; |
d43fa32f | 1464 | default: |
63eb9546 | 1465 | return -EINVAL; |
d43fa32f | 1466 | } |
e2997a72 HG |
1467 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1468 | return -ERESTARTSYS; | |
d43fa32f | 1469 | |
5b77ae77 JFM |
1470 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1471 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1472 | ret = -EBUSY; |
1473 | goto out; | |
1474 | } | |
d43fa32f | 1475 | |
5b77ae77 JFM |
1476 | /* only one file may do the capture */ |
1477 | if (gspca_dev->capt_file != NULL | |
1478 | && gspca_dev->capt_file != file) { | |
1479 | ret = -EBUSY; | |
1480 | goto out; | |
1481 | } | |
1482 | ||
1483 | /* if allocated, the buffers must not be mapped */ | |
1484 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1485 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1486 | ret = -EBUSY; |
1487 | goto out; | |
1488 | } | |
5b77ae77 JFM |
1489 | } |
1490 | ||
1491 | /* stop streaming */ | |
832d0a91 JFM |
1492 | streaming = gspca_dev->streaming; |
1493 | if (streaming) { | |
5b77ae77 | 1494 | mutex_lock(&gspca_dev->usb_lock); |
8c4ebae4 | 1495 | gspca_dev->usb_err = 0; |
5b77ae77 JFM |
1496 | gspca_stream_off(gspca_dev); |
1497 | mutex_unlock(&gspca_dev->usb_lock); | |
1498 | } | |
1499 | ||
1500 | /* free the previous allocated buffers, if any */ | |
1501 | if (gspca_dev->nframes != 0) { | |
1502 | frame_free(gspca_dev); | |
1503 | gspca_dev->capt_file = NULL; | |
1504 | } | |
1505 | if (rb->count == 0) /* unrequest */ | |
1506 | goto out; | |
1507 | gspca_dev->memory = rb->memory; | |
1508 | ret = frame_alloc(gspca_dev, rb->count); | |
1509 | if (ret == 0) { | |
1510 | rb->count = gspca_dev->nframes; | |
1511 | gspca_dev->capt_file = file; | |
832d0a91 JFM |
1512 | if (streaming) |
1513 | ret = gspca_init_transfer(gspca_dev); | |
4aa0d037 JFM |
1514 | } |
1515 | out: | |
63eb9546 JFM |
1516 | mutex_unlock(&gspca_dev->queue_lock); |
1517 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1518 | return ret; | |
1519 | } | |
1520 | ||
1521 | static int vidioc_querybuf(struct file *file, void *priv, | |
1522 | struct v4l2_buffer *v4l2_buf) | |
1523 | { | |
1524 | struct gspca_dev *gspca_dev = priv; | |
1525 | struct gspca_frame *frame; | |
1526 | ||
13752bd9 | 1527 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1528 | || v4l2_buf->index >= gspca_dev->nframes) |
1529 | return -EINVAL; | |
1530 | ||
1531 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1532 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1533 | return 0; | |
1534 | } | |
1535 | ||
1536 | static int vidioc_streamon(struct file *file, void *priv, | |
1537 | enum v4l2_buf_type buf_type) | |
1538 | { | |
1539 | struct gspca_dev *gspca_dev = priv; | |
1540 | int ret; | |
1541 | ||
63eb9546 JFM |
1542 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1543 | return -EINVAL; | |
e2997a72 HG |
1544 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1545 | return -ERESTARTSYS; | |
090264e5 | 1546 | |
18bf99aa JFM |
1547 | /* check the capture file */ |
1548 | if (gspca_dev->capt_file != file) { | |
1549 | ret = -EBUSY; | |
1550 | goto out; | |
1551 | } | |
1552 | ||
1edabe71 JFM |
1553 | if (gspca_dev->nframes == 0 |
1554 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1555 | ret = -EINVAL; |
1556 | goto out; | |
1557 | } | |
1558 | if (!gspca_dev->streaming) { | |
1559 | ret = gspca_init_transfer(gspca_dev); | |
1560 | if (ret < 0) | |
1561 | goto out; | |
1562 | } | |
335b3f88 | 1563 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1564 | if (gspca_debug & D_STREAM) { |
1565 | PDEBUG_MODE("stream on OK", | |
1566 | gspca_dev->pixfmt, | |
1567 | gspca_dev->width, | |
1568 | gspca_dev->height); | |
1569 | } | |
1570 | #endif | |
e2997a72 | 1571 | ret = 0; |
63eb9546 JFM |
1572 | out: |
1573 | mutex_unlock(&gspca_dev->queue_lock); | |
1574 | return ret; | |
1575 | } | |
1576 | ||
1577 | static int vidioc_streamoff(struct file *file, void *priv, | |
1578 | enum v4l2_buf_type buf_type) | |
1579 | { | |
1580 | struct gspca_dev *gspca_dev = priv; | |
f7059eaa | 1581 | int ret; |
63eb9546 | 1582 | |
63eb9546 JFM |
1583 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1584 | return -EINVAL; | |
4aa0d037 JFM |
1585 | if (!gspca_dev->streaming) |
1586 | return 0; | |
1587 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1588 | return -ERESTARTSYS; | |
5b77ae77 | 1589 | |
18bf99aa JFM |
1590 | /* check the capture file */ |
1591 | if (gspca_dev->capt_file != file) { | |
1592 | ret = -EBUSY; | |
1593 | goto out; | |
1594 | } | |
1595 | ||
5b77ae77 | 1596 | /* stop streaming */ |
4aa0d037 JFM |
1597 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1598 | ret = -ERESTARTSYS; | |
1599 | goto out; | |
63eb9546 | 1600 | } |
8c4ebae4 | 1601 | gspca_dev->usb_err = 0; |
4aa0d037 | 1602 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1603 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 | 1604 | |
f7059eaa JFM |
1605 | /* empty the transfer queues */ |
1606 | atomic_set(&gspca_dev->fr_q, 0); | |
1607 | atomic_set(&gspca_dev->fr_i, 0); | |
1608 | gspca_dev->fr_o = 0; | |
5b77ae77 | 1609 | ret = 0; |
4aa0d037 JFM |
1610 | out: |
1611 | mutex_unlock(&gspca_dev->queue_lock); | |
1612 | return ret; | |
63eb9546 JFM |
1613 | } |
1614 | ||
1615 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1616 | struct v4l2_jpegcompression *jpegcomp) | |
1617 | { | |
1618 | struct gspca_dev *gspca_dev = priv; | |
1619 | int ret; | |
1620 | ||
1621 | if (!gspca_dev->sd_desc->get_jcomp) | |
1622 | return -EINVAL; | |
e2997a72 HG |
1623 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1624 | return -ERESTARTSYS; | |
8c4ebae4 | 1625 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1626 | if (gspca_dev->present) |
1627 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1628 | else | |
1629 | ret = -ENODEV; | |
63eb9546 JFM |
1630 | mutex_unlock(&gspca_dev->usb_lock); |
1631 | return ret; | |
1632 | } | |
1633 | ||
1634 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1635 | struct v4l2_jpegcompression *jpegcomp) | |
1636 | { | |
1637 | struct gspca_dev *gspca_dev = priv; | |
1638 | int ret; | |
1639 | ||
63eb9546 JFM |
1640 | if (!gspca_dev->sd_desc->set_jcomp) |
1641 | return -EINVAL; | |
f86d4a91 JP |
1642 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1643 | return -ERESTARTSYS; | |
8c4ebae4 | 1644 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1645 | if (gspca_dev->present) |
1646 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1647 | else | |
1648 | ret = -ENODEV; | |
63eb9546 JFM |
1649 | mutex_unlock(&gspca_dev->usb_lock); |
1650 | return ret; | |
1651 | } | |
1652 | ||
1653 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1654 | struct v4l2_streamparm *parm) | |
1655 | { | |
1656 | struct gspca_dev *gspca_dev = priv; | |
1657 | ||
63eb9546 | 1658 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1659 | |
1660 | if (gspca_dev->sd_desc->get_streamparm) { | |
1661 | int ret; | |
1662 | ||
1663 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1664 | return -ERESTARTSYS; | |
8c4ebae4 | 1665 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1666 | if (gspca_dev->present) |
1667 | ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, | |
1668 | parm); | |
1669 | else | |
1670 | ret = -ENODEV; | |
627a5ef7 JP |
1671 | mutex_unlock(&gspca_dev->usb_lock); |
1672 | return ret; | |
1673 | } | |
1674 | ||
63eb9546 JFM |
1675 | return 0; |
1676 | } | |
1677 | ||
1678 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1679 | struct v4l2_streamparm *parm) | |
1680 | { | |
1681 | struct gspca_dev *gspca_dev = priv; | |
1682 | int n; | |
1683 | ||
63eb9546 | 1684 | n = parm->parm.capture.readbuffers; |
f7059eaa | 1685 | if (n == 0 || n >= GSPCA_MAX_FRAMES) |
63eb9546 JFM |
1686 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
1687 | else | |
1688 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1689 | |
1690 | if (gspca_dev->sd_desc->set_streamparm) { | |
1691 | int ret; | |
1692 | ||
1693 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1694 | return -ERESTARTSYS; | |
8c4ebae4 | 1695 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1696 | if (gspca_dev->present) |
1697 | ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, | |
1698 | parm); | |
1699 | else | |
1700 | ret = -ENODEV; | |
627a5ef7 JP |
1701 | mutex_unlock(&gspca_dev->usb_lock); |
1702 | return ret; | |
1703 | } | |
1704 | ||
63eb9546 JFM |
1705 | return 0; |
1706 | } | |
1707 | ||
63eb9546 JFM |
1708 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) |
1709 | { | |
1710 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1711 | struct gspca_frame *frame; |
63eb9546 JFM |
1712 | struct page *page; |
1713 | unsigned long addr, start, size; | |
1714 | int i, ret; | |
63eb9546 JFM |
1715 | |
1716 | start = vma->vm_start; | |
1717 | size = vma->vm_end - vma->vm_start; | |
1718 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1719 | ||
e2997a72 HG |
1720 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1721 | return -ERESTARTSYS; | |
63eb9546 JFM |
1722 | if (!gspca_dev->present) { |
1723 | ret = -ENODEV; | |
4aa0d037 JFM |
1724 | goto out; |
1725 | } | |
1726 | if (gspca_dev->capt_file != file) { | |
1727 | ret = -EINVAL; | |
1728 | goto out; | |
63eb9546 JFM |
1729 | } |
1730 | ||
efab8211 | 1731 | frame = NULL; |
63eb9546 JFM |
1732 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1733 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1734 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1735 | break; | |
1736 | } | |
1737 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1738 | == vma->vm_pgoff) { | |
1739 | frame = &gspca_dev->frame[i]; | |
1740 | break; | |
1741 | } | |
1742 | } | |
efab8211 | 1743 | if (frame == NULL) { |
63eb9546 JFM |
1744 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1745 | ret = -EINVAL; | |
4aa0d037 | 1746 | goto out; |
63eb9546 | 1747 | } |
38bff697 | 1748 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1749 | PDEBUG(D_STREAM, "mmap bad size"); |
1750 | ret = -EINVAL; | |
4aa0d037 | 1751 | goto out; |
63eb9546 JFM |
1752 | } |
1753 | ||
1754 | /* | |
1755 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1756 | * device. It also prevents the region from being core dumped. | |
1757 | */ | |
1758 | vma->vm_flags |= VM_IO; | |
1759 | ||
1760 | addr = (unsigned long) frame->data; | |
1761 | while (size > 0) { | |
1762 | page = vmalloc_to_page((void *) addr); | |
1763 | ret = vm_insert_page(vma, start, page); | |
1764 | if (ret < 0) | |
4aa0d037 | 1765 | goto out; |
63eb9546 JFM |
1766 | start += PAGE_SIZE; |
1767 | addr += PAGE_SIZE; | |
1768 | size -= PAGE_SIZE; | |
1769 | } | |
1770 | ||
d50e257e | 1771 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1772 | vma->vm_private_data = frame; |
1773 | gspca_vm_open(vma); | |
e2997a72 | 1774 | ret = 0; |
4aa0d037 | 1775 | out: |
63eb9546 JFM |
1776 | mutex_unlock(&gspca_dev->queue_lock); |
1777 | return ret; | |
1778 | } | |
1779 | ||
63eb9546 JFM |
1780 | /* |
1781 | * wait for a video frame | |
1782 | * | |
1783 | * If a frame is ready, its index is returned. | |
1784 | */ | |
d43fa32f | 1785 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1786 | int nonblock_ing) |
1787 | { | |
f7059eaa | 1788 | int i, ret; |
63eb9546 | 1789 | |
d43fa32f | 1790 | /* check if a frame is ready */ |
63eb9546 | 1791 | i = gspca_dev->fr_o; |
f7059eaa | 1792 | if (i == atomic_read(&gspca_dev->fr_i)) { |
181b704f HG |
1793 | if (nonblock_ing) |
1794 | return -EAGAIN; | |
1795 | ||
1796 | /* wait till a frame is ready */ | |
4aa0d037 | 1797 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
f7059eaa | 1798 | i != atomic_read(&gspca_dev->fr_i) || |
181b704f HG |
1799 | !gspca_dev->streaming || !gspca_dev->present, |
1800 | msecs_to_jiffies(3000)); | |
1801 | if (ret < 0) | |
1802 | return ret; | |
1803 | if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) | |
e2997a72 | 1804 | return -EIO; |
63eb9546 | 1805 | } |
181b704f | 1806 | |
f7059eaa | 1807 | gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; |
e2997a72 | 1808 | |
739570bb JFM |
1809 | if (gspca_dev->sd_desc->dq_callback) { |
1810 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1811 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1812 | if (gspca_dev->present) |
1813 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1814 | mutex_unlock(&gspca_dev->usb_lock); |
1815 | } | |
f7059eaa | 1816 | return gspca_dev->fr_queue[i]; |
63eb9546 JFM |
1817 | } |
1818 | ||
1819 | /* | |
1820 | * dequeue a video buffer | |
1821 | * | |
1822 | * If nonblock_ing is false, block until a buffer is available. | |
1823 | */ | |
1824 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1825 | struct v4l2_buffer *v4l2_buf) | |
1826 | { | |
1827 | struct gspca_dev *gspca_dev = priv; | |
1828 | struct gspca_frame *frame; | |
1829 | int i, ret; | |
1830 | ||
1831 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 | 1832 | if (v4l2_buf->memory != gspca_dev->memory) |
63eb9546 | 1833 | return -EINVAL; |
5b77ae77 | 1834 | |
090264e5 JFM |
1835 | if (!gspca_dev->present) |
1836 | return -ENODEV; | |
1837 | ||
5b77ae77 JFM |
1838 | /* if not streaming, be sure the application will not loop forever */ |
1839 | if (!(file->f_flags & O_NONBLOCK) | |
1840 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1841 | return -EINVAL; |
1842 | ||
5b77ae77 JFM |
1843 | /* only the capturing file may dequeue */ |
1844 | if (gspca_dev->capt_file != file) | |
1845 | return -EINVAL; | |
1846 | ||
1847 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1848 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1849 | return -ERESTARTSYS; | |
1850 | ||
d43fa32f | 1851 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1852 | if (ret < 0) |
4aa0d037 | 1853 | goto out; |
63eb9546 JFM |
1854 | i = ret; /* frame index */ |
1855 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1856 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1857 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1858 | frame->data, |
1859 | frame->v4l2_buf.bytesused)) { | |
1860 | PDEBUG(D_ERR|D_STREAM, | |
1861 | "dqbuf cp to user failed"); | |
1862 | ret = -EFAULT; | |
1863 | goto out; | |
1864 | } | |
1865 | } | |
63eb9546 JFM |
1866 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1867 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1868 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1869 | ret = 0; | |
4aa0d037 | 1870 | out: |
63eb9546 JFM |
1871 | mutex_unlock(&gspca_dev->read_lock); |
1872 | return ret; | |
1873 | } | |
1874 | ||
1875 | /* | |
1876 | * queue a video buffer | |
1877 | * | |
1878 | * Attempting to queue a buffer that has already been | |
1879 | * queued will return -EINVAL. | |
1880 | */ | |
1881 | static int vidioc_qbuf(struct file *file, void *priv, | |
1882 | struct v4l2_buffer *v4l2_buf) | |
1883 | { | |
1884 | struct gspca_dev *gspca_dev = priv; | |
1885 | struct gspca_frame *frame; | |
1886 | int i, index, ret; | |
1887 | ||
1888 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1889 | |
5b77ae77 JFM |
1890 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1891 | return -ERESTARTSYS; | |
1892 | ||
63eb9546 JFM |
1893 | index = v4l2_buf->index; |
1894 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1895 | PDEBUG(D_FRAM, |
63eb9546 | 1896 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1897 | ret = -EINVAL; |
1898 | goto out; | |
63eb9546 | 1899 | } |
5b77ae77 | 1900 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1901 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1902 | ret = -EINVAL; |
1903 | goto out; | |
63eb9546 | 1904 | } |
e2997a72 | 1905 | |
5b77ae77 | 1906 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1907 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1908 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1909 | ret = -EINVAL; |
1910 | goto out; | |
1911 | } | |
1912 | ||
1913 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1914 | |
d43fa32f | 1915 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1916 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1917 | frame->v4l2_buf.length = v4l2_buf->length; | |
1918 | } | |
1919 | ||
1920 | /* put the buffer in the 'queued' queue */ | |
f7059eaa | 1921 | i = atomic_read(&gspca_dev->fr_q); |
63eb9546 | 1922 | gspca_dev->fr_queue[i] = index; |
f7059eaa | 1923 | atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); |
63eb9546 JFM |
1924 | |
1925 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1926 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1927 | ret = 0; | |
1928 | out: | |
1929 | mutex_unlock(&gspca_dev->queue_lock); | |
1930 | return ret; | |
1931 | } | |
1932 | ||
d43fa32f JFM |
1933 | /* |
1934 | * allocate the resources for read() | |
1935 | */ | |
1936 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1937 | struct file *file) | |
63eb9546 | 1938 | { |
63eb9546 | 1939 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1940 | int i, ret; |
63eb9546 | 1941 | |
d43fa32f | 1942 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1943 | if (gspca_dev->nframes == 0) { |
1944 | struct v4l2_requestbuffers rb; | |
1945 | ||
1946 | memset(&rb, 0, sizeof rb); | |
1947 | rb.count = gspca_dev->nbufread; | |
1948 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1949 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1950 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1951 | if (ret != 0) { | |
d43fa32f | 1952 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1953 | return ret; |
1954 | } | |
1955 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1956 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1957 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1958 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1959 | v4l2_buf.index = i; | |
63eb9546 JFM |
1960 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1961 | if (ret != 0) { | |
1962 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1963 | return ret; | |
1964 | } | |
1965 | } | |
d43fa32f JFM |
1966 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1967 | } | |
4aa0d037 | 1968 | |
d43fa32f JFM |
1969 | /* start streaming */ |
1970 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1971 | if (ret != 0) | |
1972 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1973 | return ret; | |
1974 | } | |
1975 | ||
1976 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1977 | { | |
1978 | struct gspca_dev *gspca_dev = file->private_data; | |
f7059eaa | 1979 | int ret; |
d43fa32f JFM |
1980 | |
1981 | PDEBUG(D_FRAM, "poll"); | |
1982 | ||
1983 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 1984 | |
5b77ae77 JFM |
1985 | /* if reqbufs is not done, the user would use read() */ |
1986 | if (gspca_dev->nframes == 0) { | |
1987 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1988 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1989 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1990 | if (ret != 0) |
1991 | return POLLERR; | |
63eb9546 JFM |
1992 | } |
1993 | ||
d43fa32f JFM |
1994 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1995 | return POLLERR; | |
d43fa32f | 1996 | |
f7059eaa JFM |
1997 | /* check if an image has been received */ |
1998 | if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) | |
1999 | ret = POLLIN | POLLRDNORM; /* yes */ | |
d43fa32f JFM |
2000 | else |
2001 | ret = 0; | |
d43fa32f | 2002 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
2003 | if (!gspca_dev->present) |
2004 | return POLLHUP; | |
d43fa32f JFM |
2005 | return ret; |
2006 | } | |
2007 | ||
2008 | static ssize_t dev_read(struct file *file, char __user *data, | |
2009 | size_t count, loff_t *ppos) | |
2010 | { | |
2011 | struct gspca_dev *gspca_dev = file->private_data; | |
2012 | struct gspca_frame *frame; | |
2013 | struct v4l2_buffer v4l2_buf; | |
2014 | struct timeval timestamp; | |
82643d0e | 2015 | int n, ret, ret2; |
d43fa32f | 2016 | |
a9e11134 | 2017 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
2018 | if (!gspca_dev->present) |
2019 | return -ENODEV; | |
2020 | switch (gspca_dev->memory) { | |
2021 | case GSPCA_MEMORY_NO: /* first time */ | |
2022 | ret = read_alloc(gspca_dev, file); | |
2023 | if (ret != 0) | |
2024 | return ret; | |
2025 | break; | |
2026 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
2027 | if (gspca_dev->capt_file == file) |
2028 | break; | |
2029 | /* fall thru */ | |
d43fa32f JFM |
2030 | default: |
2031 | return -EINVAL; | |
2032 | } | |
2033 | ||
63eb9546 | 2034 | /* get a frame */ |
2f51d00f | 2035 | timestamp = ktime_to_timeval(ktime_get()); |
63eb9546 | 2036 | timestamp.tv_sec--; |
82643d0e JFM |
2037 | n = 2; |
2038 | for (;;) { | |
63eb9546 JFM |
2039 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
2040 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 2041 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2042 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
2043 | if (ret != 0) { | |
2044 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
2045 | return ret; | |
2046 | } | |
2047 | ||
2048 | /* if the process slept for more than 1 second, | |
219423c1 | 2049 | * get a newer frame */ |
63eb9546 | 2050 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
2051 | if (--n < 0) |
2052 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
2053 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
2054 | break; | |
2055 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2056 | if (ret != 0) { | |
2057 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
2058 | return ret; | |
2059 | } | |
2060 | } | |
2061 | ||
2062 | /* copy the frame */ | |
ac0d6df6 JFM |
2063 | if (count > frame->v4l2_buf.bytesused) |
2064 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
2065 | ret = copy_to_user(data, frame->data, count); |
2066 | if (ret != 0) { | |
2067 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 2068 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
2069 | ret = -EFAULT; |
2070 | goto out; | |
2071 | } | |
2072 | ret = count; | |
2073 | out: | |
2074 | /* in each case, requeue the buffer */ | |
2075 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2076 | if (ret2 != 0) | |
2077 | return ret2; | |
2078 | return ret; | |
2079 | } | |
2080 | ||
bec43661 | 2081 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
2082 | .owner = THIS_MODULE, |
2083 | .open = dev_open, | |
2084 | .release = dev_close, | |
2085 | .read = dev_read, | |
2086 | .mmap = dev_mmap, | |
bec43661 | 2087 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
2088 | .poll = dev_poll, |
2089 | }; | |
2090 | ||
a399810c | 2091 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
2092 | .vidioc_querycap = vidioc_querycap, |
2093 | .vidioc_dqbuf = vidioc_dqbuf, | |
2094 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
2095 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
2096 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
2097 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
2098 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
2099 | .vidioc_streamon = vidioc_streamon, |
2100 | .vidioc_queryctrl = vidioc_queryctrl, | |
2101 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
2102 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
2103 | .vidioc_querymenu = vidioc_querymenu, | |
2104 | .vidioc_enum_input = vidioc_enum_input, | |
2105 | .vidioc_g_input = vidioc_g_input, | |
2106 | .vidioc_s_input = vidioc_s_input, | |
2107 | .vidioc_reqbufs = vidioc_reqbufs, | |
2108 | .vidioc_querybuf = vidioc_querybuf, | |
2109 | .vidioc_streamoff = vidioc_streamoff, | |
2110 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
2111 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
2112 | .vidioc_g_parm = vidioc_g_parm, | |
2113 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2114 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2115 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa BJ |
2116 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
2117 | .vidioc_g_register = vidioc_g_register, | |
2118 | .vidioc_s_register = vidioc_s_register, | |
2119 | #endif | |
2120 | .vidioc_g_chip_ident = vidioc_g_chip_ident, | |
63eb9546 JFM |
2121 | }; |
2122 | ||
a399810c HV |
2123 | static struct video_device gspca_template = { |
2124 | .name = "gspca main driver", | |
a399810c HV |
2125 | .fops = &dev_fops, |
2126 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 2127 | .release = gspca_release, |
a399810c HV |
2128 | }; |
2129 | ||
63eb9546 JFM |
2130 | /* |
2131 | * probe and create a new gspca device | |
2132 | * | |
2133 | * This function must be called by the sub-driver when it is | |
2134 | * called for probing a new device. | |
2135 | */ | |
4462864d | 2136 | int gspca_dev_probe2(struct usb_interface *intf, |
63eb9546 JFM |
2137 | const struct usb_device_id *id, |
2138 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2139 | int dev_size, |
2140 | struct module *module) | |
63eb9546 | 2141 | { |
63eb9546 JFM |
2142 | struct gspca_dev *gspca_dev; |
2143 | struct usb_device *dev = interface_to_usbdev(intf); | |
2144 | int ret; | |
63eb9546 | 2145 | |
6a7eba24 | 2146 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 | 2147 | |
63eb9546 JFM |
2148 | /* create the device */ |
2149 | if (dev_size < sizeof *gspca_dev) | |
2150 | dev_size = sizeof *gspca_dev; | |
2151 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2152 | if (!gspca_dev) { |
63eb9546 | 2153 | err("couldn't kzalloc gspca struct"); |
e293e599 | 2154 | return -ENOMEM; |
63eb9546 | 2155 | } |
8295d99e JFM |
2156 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2157 | if (!gspca_dev->usb_buf) { | |
2158 | err("out of memory"); | |
e293e599 | 2159 | ret = -ENOMEM; |
8295d99e JFM |
2160 | goto out; |
2161 | } | |
63eb9546 | 2162 | gspca_dev->dev = dev; |
4462864d | 2163 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
d43fa32f | 2164 | gspca_dev->nbalt = intf->num_altsetting; |
35680baa JFM |
2165 | |
2166 | /* check if any audio device */ | |
2167 | if (dev->config->desc.bNumInterfaces != 1) { | |
2168 | int i; | |
2169 | struct usb_interface *intf2; | |
2170 | ||
2171 | for (i = 0; i < dev->config->desc.bNumInterfaces; i++) { | |
2172 | intf2 = dev->config->interface[i]; | |
2173 | if (intf2 != NULL | |
2174 | && intf2->altsetting != NULL | |
2175 | && intf2->altsetting->desc.bInterfaceClass == | |
2176 | USB_CLASS_AUDIO) { | |
2177 | gspca_dev->audio = 1; | |
2178 | break; | |
2179 | } | |
2180 | } | |
2181 | } | |
2182 | ||
63eb9546 | 2183 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2184 | gspca_dev->nbufread = 2; |
ff374747 | 2185 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 2186 | |
012d6b02 | 2187 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2188 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2189 | if (ret < 0) |
2190 | goto out; | |
ba38ee8e | 2191 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
2192 | if (ret < 0) |
2193 | goto out; | |
2194 | gspca_set_default_mode(gspca_dev); | |
2195 | ||
10ee2402 HG |
2196 | ret = gspca_input_connect(gspca_dev); |
2197 | if (ret) | |
2198 | goto out; | |
2199 | ||
63eb9546 JFM |
2200 | mutex_init(&gspca_dev->usb_lock); |
2201 | mutex_init(&gspca_dev->read_lock); | |
2202 | mutex_init(&gspca_dev->queue_lock); | |
2203 | init_waitqueue_head(&gspca_dev->wq); | |
2204 | ||
2205 | /* init video stuff */ | |
ba38ee8e | 2206 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
24441631 | 2207 | gspca_dev->vdev.parent = &intf->dev; |
5c4fa002 | 2208 | gspca_dev->module = module; |
ee56a4d3 | 2209 | gspca_dev->present = 1; |
a12ca6a6 | 2210 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2211 | VFL_TYPE_GRABBER, |
8d584a53 | 2212 | -1); |
63eb9546 JFM |
2213 | if (ret < 0) { |
2214 | err("video_register_device err %d", ret); | |
2215 | goto out; | |
2216 | } | |
2217 | ||
63eb9546 | 2218 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2219 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
0274d42e | 2220 | |
10ee2402 | 2221 | gspca_input_create_urb(gspca_dev); |
0274d42e | 2222 | |
63eb9546 JFM |
2223 | return 0; |
2224 | out: | |
f7628015 | 2225 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
10ee2402 HG |
2226 | if (gspca_dev->input_dev) |
2227 | input_unregister_device(gspca_dev->input_dev); | |
e7637521 | 2228 | #endif |
e07a1d8a JFM |
2229 | kfree(gspca_dev->usb_buf); |
2230 | kfree(gspca_dev); | |
63eb9546 JFM |
2231 | return ret; |
2232 | } | |
4462864d JFM |
2233 | EXPORT_SYMBOL(gspca_dev_probe2); |
2234 | ||
2235 | /* same function as the previous one, but check the interface */ | |
2236 | int gspca_dev_probe(struct usb_interface *intf, | |
2237 | const struct usb_device_id *id, | |
2238 | const struct sd_desc *sd_desc, | |
2239 | int dev_size, | |
2240 | struct module *module) | |
2241 | { | |
2242 | struct usb_device *dev = interface_to_usbdev(intf); | |
2243 | ||
2244 | /* we don't handle multi-config cameras */ | |
2245 | if (dev->descriptor.bNumConfigurations != 1) { | |
2246 | PDEBUG(D_ERR, "%04x:%04x too many config", | |
2247 | id->idVendor, id->idProduct); | |
2248 | return -ENODEV; | |
2249 | } | |
2250 | ||
2251 | /* the USB video interface must be the first one */ | |
2252 | if (dev->config->desc.bNumInterfaces != 1 | |
c4dc692c | 2253 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
4462864d | 2254 | return -ENODEV; |
4462864d JFM |
2255 | |
2256 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); | |
2257 | } | |
63eb9546 JFM |
2258 | EXPORT_SYMBOL(gspca_dev_probe); |
2259 | ||
2260 | /* | |
2261 | * USB disconnection | |
2262 | * | |
2263 | * This function must be called by the sub-driver | |
2264 | * when the device disconnects, after the specific resources are freed. | |
2265 | */ | |
2266 | void gspca_disconnect(struct usb_interface *intf) | |
2267 | { | |
4aa0d037 | 2268 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
f7628015 | 2269 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e | 2270 | struct input_dev *input_dev; |
e070bf9e | 2271 | #endif |
63eb9546 | 2272 | |
38c7c036 LP |
2273 | PDEBUG(D_PROBE, "%s disconnect", |
2274 | video_device_node_name(&gspca_dev->vdev)); | |
ad28127d | 2275 | mutex_lock(&gspca_dev->usb_lock); |
6e4ae872 | 2276 | gspca_dev->present = 0; |
6e4ae872 | 2277 | |
090264e5 JFM |
2278 | if (gspca_dev->streaming) { |
2279 | destroy_urbs(gspca_dev); | |
2280 | wake_up_interruptible(&gspca_dev->wq); | |
2281 | } | |
2282 | ||
f7628015 | 2283 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
2284 | gspca_input_destroy_urb(gspca_dev); |
2285 | input_dev = gspca_dev->input_dev; | |
2286 | if (input_dev) { | |
2287 | gspca_dev->input_dev = NULL; | |
2288 | input_unregister_device(input_dev); | |
2289 | } | |
e070bf9e | 2290 | #endif |
0274d42e | 2291 | |
090264e5 | 2292 | /* the device is freed at exit of this function */ |
ad28127d | 2293 | gspca_dev->dev = NULL; |
090264e5 JFM |
2294 | mutex_unlock(&gspca_dev->usb_lock); |
2295 | ||
6b060ffe FZ |
2296 | usb_set_intfdata(intf, NULL); |
2297 | ||
a12ca6a6 JFM |
2298 | /* release the device */ |
2299 | /* (this will call gspca_release() immediatly or on last close) */ | |
2300 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 2301 | |
0d07e240 | 2302 | /* PDEBUG(D_PROBE, "disconnect complete"); */ |
63eb9546 JFM |
2303 | } |
2304 | EXPORT_SYMBOL(gspca_disconnect); | |
2305 | ||
6a709749 JFM |
2306 | #ifdef CONFIG_PM |
2307 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2308 | { | |
2309 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2310 | ||
2311 | if (!gspca_dev->streaming) | |
2312 | return 0; | |
2313 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2314 | if (gspca_dev->sd_desc->stopN) |
2315 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 | 2316 | destroy_urbs(gspca_dev); |
0274d42e | 2317 | gspca_input_destroy_urb(gspca_dev); |
6a709749 | 2318 | gspca_set_alt0(gspca_dev); |
012d6b02 JFM |
2319 | if (gspca_dev->sd_desc->stop0) |
2320 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2321 | return 0; |
2322 | } | |
2323 | EXPORT_SYMBOL(gspca_suspend); | |
2324 | ||
2325 | int gspca_resume(struct usb_interface *intf) | |
2326 | { | |
2327 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2328 | ||
2329 | gspca_dev->frozen = 0; | |
012d6b02 | 2330 | gspca_dev->sd_desc->init(gspca_dev); |
0274d42e | 2331 | gspca_input_create_urb(gspca_dev); |
012d6b02 JFM |
2332 | if (gspca_dev->streaming) |
2333 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2334 | return 0; |
6a709749 JFM |
2335 | } |
2336 | EXPORT_SYMBOL(gspca_resume); | |
2337 | #endif | |
dcef3237 HG |
2338 | /* -- cam driver utility functions -- */ |
2339 | ||
2340 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2341 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2342 | ||
2343 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2344 | where changed. */ | |
2345 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2346 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2347 | { | |
2348 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2349 | const struct ctrl *gain_ctrl = NULL; | |
2350 | const struct ctrl *exposure_ctrl = NULL; | |
2351 | const struct ctrl *autogain_ctrl = NULL; | |
2352 | int retval = 0; | |
2353 | ||
2354 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
26984b09 HG |
2355 | if (gspca_dev->ctrl_dis & (1 << i)) |
2356 | continue; | |
dcef3237 HG |
2357 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) |
2358 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2359 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2360 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2361 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2362 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2363 | } | |
2364 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2365 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2366 | "on cam without (auto)gain/exposure"); | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2371 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2372 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2373 | return 0; | |
2374 | ||
2375 | orig_gain = gain; | |
2376 | orig_exposure = exposure; | |
2377 | ||
2378 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2379 | desired lumination fast (with the risc of a slight overshoot) */ | |
2380 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2381 | ||
1c44d81d | 2382 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2383 | avg_lum, desired_avg_lum, steps); |
2384 | ||
2385 | for (i = 0; i < steps; i++) { | |
2386 | if (avg_lum > desired_avg_lum) { | |
2387 | if (gain > gain_knee) | |
2388 | gain--; | |
2389 | else if (exposure > exposure_knee) | |
2390 | exposure--; | |
2391 | else if (gain > gain_ctrl->qctrl.default_value) | |
2392 | gain--; | |
2393 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2394 | exposure--; | |
2395 | else if (gain > gain_ctrl->qctrl.minimum) | |
2396 | gain--; | |
2397 | else | |
2398 | break; | |
2399 | } else { | |
2400 | if (gain < gain_ctrl->qctrl.default_value) | |
2401 | gain++; | |
2402 | else if (exposure < exposure_knee) | |
2403 | exposure++; | |
2404 | else if (gain < gain_knee) | |
2405 | gain++; | |
2406 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2407 | exposure++; | |
2408 | else if (gain < gain_ctrl->qctrl.maximum) | |
2409 | gain++; | |
2410 | else | |
2411 | break; | |
2412 | } | |
2413 | } | |
2414 | ||
2415 | if (gain != orig_gain) { | |
2416 | gain_ctrl->set(gspca_dev, gain); | |
2417 | retval = 1; | |
2418 | } | |
2419 | if (exposure != orig_exposure) { | |
2420 | exposure_ctrl->set(gspca_dev, exposure); | |
2421 | retval = 1; | |
2422 | } | |
2423 | ||
2424 | return retval; | |
2425 | } | |
2426 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2427 | ||
63eb9546 JFM |
2428 | /* -- module insert / remove -- */ |
2429 | static int __init gspca_init(void) | |
2430 | { | |
bb64e86c JFM |
2431 | info("main v%d.%d.%d registered", |
2432 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2433 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2434 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2435 | return 0; |
2436 | } | |
2437 | static void __exit gspca_exit(void) | |
2438 | { | |
2439 | info("main deregistered"); | |
2440 | } | |
2441 | ||
2442 | module_init(gspca_init); | |
2443 | module_exit(gspca_exit); | |
2444 | ||
335b3f88 | 2445 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2446 | module_param_named(debug, gspca_debug, int, 0644); |
2447 | MODULE_PARM_DESC(debug, | |
2448 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2449 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2450 | " 0x0100: v4l2"); | |
6a7eba24 | 2451 | #endif |