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Commit | Line | Data |
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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
59929cef | 4 | * Copyright (C) 2008-2011 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 | ||
133a9fe9 JP |
24 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
25 | ||
f22123fa | 26 | #define GSPCA_VERSION "2.14.0" |
63eb9546 JFM |
27 | |
28 | #include <linux/init.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/vmalloc.h> | |
31 | #include <linux/sched.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/pagemap.h> | |
956e42d2 | 36 | #include <linux/io.h> |
63eb9546 | 37 | #include <asm/page.h> |
956e42d2 | 38 | #include <linux/uaccess.h> |
2f51d00f | 39 | #include <linux/ktime.h> |
35ea11ff | 40 | #include <media/v4l2-ioctl.h> |
62bba5dd | 41 | #include <media/v4l2-ctrls.h> |
2333565d | 42 | #include <media/v4l2-fh.h> |
d57fb9f8 | 43 | #include <media/v4l2-event.h> |
63eb9546 JFM |
44 | |
45 | #include "gspca.h" | |
46 | ||
13a00fab | 47 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e MN |
48 | #include <linux/input.h> |
49 | #include <linux/usb/input.h> | |
e070bf9e | 50 | #endif |
0274d42e | 51 | |
d43fa32f | 52 | /* global values */ |
8fee8453 JFM |
53 | #define DEF_NURBS 3 /* default number of URBs */ |
54 | #if DEF_NURBS > MAX_NURBS | |
55 | #error "DEF_NURBS too big" | |
56 | #endif | |
d43fa32f | 57 | |
27c6f9e5 | 58 | MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); |
63eb9546 JFM |
59 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); |
60 | MODULE_LICENSE("GPL"); | |
f22123fa | 61 | MODULE_VERSION(GSPCA_VERSION); |
63eb9546 | 62 | |
c93396e1 | 63 | int gspca_debug; |
63eb9546 JFM |
64 | EXPORT_SYMBOL(gspca_debug); |
65 | ||
c93396e1 TK |
66 | static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, |
67 | __u32 pixfmt, int w, int h) | |
63eb9546 JFM |
68 | { |
69 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
c93396e1 | 70 | PDEBUG(debug, "%s %c%c%c%c %dx%d", |
63eb9546 JFM |
71 | txt, |
72 | pixfmt & 0xff, | |
73 | (pixfmt >> 8) & 0xff, | |
74 | (pixfmt >> 16) & 0xff, | |
75 | pixfmt >> 24, | |
76 | w, h); | |
77 | } else { | |
c93396e1 | 78 | PDEBUG(debug, "%s 0x%08x %dx%d", |
63eb9546 JFM |
79 | txt, |
80 | pixfmt, | |
81 | w, h); | |
82 | } | |
83 | } | |
63eb9546 | 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 | */ | |
13a00fab | 118 | #if IS_ENABLED(CONFIG_INPUT) |
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) { | |
c93396e1 | 129 | PERR("Unknown packet received"); |
0274d42e MN |
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: | |
c93396e1 | 143 | PERR("URB error %i, resubmitting", urb->status); |
0274d42e MN |
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) | |
133a9fe9 | 151 | pr_err("Resubmit URB failed with error %i\n", 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) { | |
133a9fe9 JP |
180 | pr_err("Input device registration failed with error %i\n", |
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; |
1ddc9f75 | 204 | PDEBUG(D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u", |
0274d42e MN |
205 | ep->bEndpointAddress, buffer_len, interval); |
206 | ||
207 | dev = gspca_dev->dev; | |
208 | ||
209 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
210 | if (!urb) { | |
211 | ret = -ENOMEM; | |
212 | goto error; | |
213 | } | |
214 | ||
7a9b1492 | 215 | buffer = usb_alloc_coherent(dev, buffer_len, |
0274d42e MN |
216 | GFP_KERNEL, &urb->transfer_dma); |
217 | if (!buffer) { | |
218 | ret = -ENOMEM; | |
219 | goto error_buffer; | |
220 | } | |
221 | usb_fill_int_urb(urb, dev, | |
222 | usb_rcvintpipe(dev, ep->bEndpointAddress), | |
223 | buffer, buffer_len, | |
224 | int_irq, (void *)gspca_dev, interval); | |
882787ff | 225 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
0274d42e MN |
226 | ret = usb_submit_urb(urb, GFP_KERNEL); |
227 | if (ret < 0) { | |
c93396e1 | 228 | PERR("submit int URB failed with error %i", ret); |
0274d42e MN |
229 | goto error_submit; |
230 | } | |
2661da47 | 231 | gspca_dev->int_urb = urb; |
0274d42e MN |
232 | return ret; |
233 | ||
234 | error_submit: | |
997ea58e DM |
235 | usb_free_coherent(dev, |
236 | urb->transfer_buffer_length, | |
237 | urb->transfer_buffer, | |
238 | urb->transfer_dma); | |
0274d42e MN |
239 | error_buffer: |
240 | usb_free_urb(urb); | |
241 | error: | |
242 | return ret; | |
243 | } | |
244 | ||
10ee2402 | 245 | static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
0274d42e | 246 | { |
0274d42e MN |
247 | struct usb_interface *intf; |
248 | struct usb_host_interface *intf_desc; | |
249 | struct usb_endpoint_descriptor *ep; | |
250 | int i; | |
251 | ||
252 | if (gspca_dev->sd_desc->int_pkt_scan) { | |
253 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
254 | intf_desc = intf->cur_altsetting; | |
255 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
256 | ep = &intf_desc->endpoint[i].desc; | |
257 | if (usb_endpoint_dir_in(ep) && | |
258 | usb_endpoint_xfer_int(ep)) { | |
259 | ||
10ee2402 | 260 | alloc_and_submit_int_urb(gspca_dev, ep); |
0274d42e MN |
261 | break; |
262 | } | |
263 | } | |
264 | } | |
0274d42e MN |
265 | } |
266 | ||
267 | static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
268 | { | |
269 | struct urb *urb; | |
270 | ||
271 | urb = gspca_dev->int_urb; | |
272 | if (urb) { | |
273 | gspca_dev->int_urb = NULL; | |
274 | usb_kill_urb(urb); | |
997ea58e DM |
275 | usb_free_coherent(gspca_dev->dev, |
276 | urb->transfer_buffer_length, | |
277 | urb->transfer_buffer, | |
278 | urb->transfer_dma); | |
0274d42e MN |
279 | usb_free_urb(urb); |
280 | } | |
281 | } | |
f7628015 RD |
282 | #else |
283 | static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
284 | { | |
285 | } | |
286 | ||
287 | static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) | |
288 | { | |
289 | } | |
290 | ||
291 | static inline int gspca_input_connect(struct gspca_dev *dev) | |
292 | { | |
293 | return 0; | |
294 | } | |
0274d42e MN |
295 | #endif |
296 | ||
63eb9546 | 297 | /* |
d43fa32f | 298 | * fill a video frame from an URB and resubmit |
63eb9546 | 299 | */ |
d43fa32f JFM |
300 | static void fill_frame(struct gspca_dev *gspca_dev, |
301 | struct urb *urb) | |
63eb9546 | 302 | { |
8d584a53 | 303 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 304 | int i, len, st; |
63eb9546 JFM |
305 | cam_pkt_op pkt_scan; |
306 | ||
6a7eba24 | 307 | if (urb->status != 0) { |
090264e5 JFM |
308 | if (urb->status == -ESHUTDOWN) |
309 | return; /* disconnection */ | |
62ee8eee | 310 | #ifdef CONFIG_PM |
6a540bdf HG |
311 | if (gspca_dev->frozen) |
312 | return; | |
62ee8eee | 313 | #endif |
c93396e1 | 314 | PERR("urb status: %d", urb->status); |
8157852f | 315 | urb->status = 0; |
bf926adf | 316 | goto resubmit; |
6a7eba24 | 317 | } |
63eb9546 JFM |
318 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
319 | for (i = 0; i < urb->number_of_packets; i++) { | |
95f18be2 | 320 | len = urb->iso_frame_desc[i].actual_length; |
63eb9546 | 321 | |
63eb9546 | 322 | /* check the packet status and length */ |
63eb9546 JFM |
323 | st = urb->iso_frame_desc[i].status; |
324 | if (st) { | |
133a9fe9 JP |
325 | pr_err("ISOC data error: [%d] len=%d, status=%d\n", |
326 | i, len, st); | |
63eb9546 JFM |
327 | gspca_dev->last_packet_type = DISCARD_PACKET; |
328 | continue; | |
329 | } | |
76ebc16b JFM |
330 | if (len == 0) { |
331 | if (gspca_dev->empty_packet == 0) | |
332 | gspca_dev->empty_packet = 1; | |
333 | continue; | |
334 | } | |
63eb9546 JFM |
335 | |
336 | /* let the packet be analyzed by the subdriver */ | |
337 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
338 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 339 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 340 | + urb->iso_frame_desc[i].offset; |
76dd272b | 341 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
342 | } |
343 | ||
bf926adf | 344 | resubmit: |
63eb9546 | 345 | /* resubmit the URB */ |
63eb9546 JFM |
346 | st = usb_submit_urb(urb, GFP_ATOMIC); |
347 | if (st < 0) | |
133a9fe9 | 348 | pr_err("usb_submit_urb() ret %d\n", st); |
63eb9546 JFM |
349 | } |
350 | ||
d43fa32f JFM |
351 | /* |
352 | * ISOC message interrupt from the USB device | |
353 | * | |
ac0d6df6 | 354 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 355 | */ |
8d584a53 | 356 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
357 | { |
358 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
359 | ||
3647fea8 | 360 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
361 | if (!gspca_dev->streaming) |
362 | return; | |
363 | fill_frame(gspca_dev, urb); | |
364 | } | |
365 | ||
0be01004 JFM |
366 | /* |
367 | * bulk message interrupt from the USB device | |
368 | */ | |
8d584a53 | 369 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
370 | { |
371 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 372 | int st; |
0be01004 JFM |
373 | |
374 | PDEBUG(D_PACK, "bulk irq"); | |
375 | if (!gspca_dev->streaming) | |
376 | return; | |
880ae24d JFM |
377 | switch (urb->status) { |
378 | case 0: | |
379 | break; | |
090264e5 JFM |
380 | case -ESHUTDOWN: |
381 | return; /* disconnection */ | |
880ae24d | 382 | default: |
0be01004 | 383 | #ifdef CONFIG_PM |
6a540bdf HG |
384 | if (gspca_dev->frozen) |
385 | return; | |
0be01004 | 386 | #endif |
c93396e1 | 387 | PERR("urb status: %d", urb->status); |
8157852f | 388 | urb->status = 0; |
bf926adf | 389 | goto resubmit; |
0be01004 JFM |
390 | } |
391 | ||
d131c3c9 JFM |
392 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
393 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
394 | urb->transfer_buffer, |
395 | urb->actual_length); | |
dff369aa | 396 | |
bf926adf | 397 | resubmit: |
dff369aa AO |
398 | /* resubmit the URB */ |
399 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
400 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
401 | if (st < 0) | |
133a9fe9 | 402 | pr_err("usb_submit_urb() ret %d\n", st); |
dff369aa | 403 | } |
0be01004 JFM |
404 | } |
405 | ||
63eb9546 JFM |
406 | /* |
407 | * add data to the current frame | |
408 | * | |
ac0d6df6 JFM |
409 | * This function is called by the subdrivers at interrupt level. |
410 | * | |
63eb9546 JFM |
411 | * To build a frame, these ones must add |
412 | * - one FIRST_PACKET | |
413 | * - 0 or many INTER_PACKETs | |
414 | * - one LAST_PACKET | |
415 | * DISCARD_PACKET invalidates the whole frame. | |
63eb9546 | 416 | */ |
76dd272b JFM |
417 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
418 | enum gspca_packet_type packet_type, | |
419 | const u8 *data, | |
420 | int len) | |
63eb9546 | 421 | { |
3ec342f2 | 422 | struct gspca_frame *frame; |
63eb9546 JFM |
423 | int i, j; |
424 | ||
e2997a72 | 425 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 | 426 | |
63eb9546 | 427 | if (packet_type == FIRST_PACKET) { |
f7059eaa JFM |
428 | i = atomic_read(&gspca_dev->fr_i); |
429 | ||
430 | /* if there are no queued buffer, discard the whole frame */ | |
431 | if (i == atomic_read(&gspca_dev->fr_q)) { | |
432 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
2e0544a8 | 433 | gspca_dev->sequence++; |
f7059eaa JFM |
434 | return; |
435 | } | |
b192ca98 JFM |
436 | j = gspca_dev->fr_queue[i]; |
437 | frame = &gspca_dev->frame[j]; | |
5ba0e2c3 | 438 | v4l2_get_timestamp(&frame->v4l2_buf.timestamp); |
2e0544a8 | 439 | frame->v4l2_buf.sequence = gspca_dev->sequence++; |
f7059eaa | 440 | gspca_dev->image = frame->data; |
b192ca98 | 441 | gspca_dev->image_len = 0; |
fe988f56 JFM |
442 | } else { |
443 | switch (gspca_dev->last_packet_type) { | |
444 | case DISCARD_PACKET: | |
fa4376d2 | 445 | if (packet_type == LAST_PACKET) { |
fe988f56 | 446 | gspca_dev->last_packet_type = packet_type; |
fa4376d2 HG |
447 | gspca_dev->image = NULL; |
448 | gspca_dev->image_len = 0; | |
449 | } | |
fe988f56 JFM |
450 | return; |
451 | case LAST_PACKET: | |
452 | return; | |
453 | } | |
d43fa32f | 454 | } |
63eb9546 | 455 | |
d43fa32f | 456 | /* append the packet to the frame buffer */ |
63eb9546 | 457 | if (len > 0) { |
b192ca98 | 458 | if (gspca_dev->image_len + len > gspca_dev->frsz) { |
c93396e1 | 459 | PERR("frame overflow %d > %d", |
b192ca98 JFM |
460 | gspca_dev->image_len + len, |
461 | gspca_dev->frsz); | |
63eb9546 JFM |
462 | packet_type = DISCARD_PACKET; |
463 | } else { | |
fe988f56 JFM |
464 | /* !! image is NULL only when last pkt is LAST or DISCARD |
465 | if (gspca_dev->image == NULL) { | |
133a9fe9 | 466 | pr_err("gspca_frame_add() image == NULL\n"); |
fe988f56 JFM |
467 | return; |
468 | } | |
469 | */ | |
b192ca98 JFM |
470 | memcpy(gspca_dev->image + gspca_dev->image_len, |
471 | data, len); | |
472 | gspca_dev->image_len += len; | |
63eb9546 JFM |
473 | } |
474 | } | |
475 | gspca_dev->last_packet_type = packet_type; | |
476 | ||
f7059eaa JFM |
477 | /* if last packet, invalidate packet concatenation until |
478 | * next first packet, wake up the application and advance | |
479 | * in the queue */ | |
63eb9546 | 480 | if (packet_type == LAST_PACKET) { |
f7059eaa | 481 | i = atomic_read(&gspca_dev->fr_i); |
b192ca98 JFM |
482 | j = gspca_dev->fr_queue[i]; |
483 | frame = &gspca_dev->frame[j]; | |
484 | frame->v4l2_buf.bytesused = gspca_dev->image_len; | |
02bbcb9d JFM |
485 | frame->v4l2_buf.flags = (frame->v4l2_buf.flags |
486 | | V4L2_BUF_FLAG_DONE) | |
487 | & ~V4L2_BUF_FLAG_QUEUED; | |
f7059eaa JFM |
488 | i = (i + 1) % GSPCA_MAX_FRAMES; |
489 | atomic_set(&gspca_dev->fr_i, i); | |
63eb9546 | 490 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
f7059eaa JFM |
491 | PDEBUG(D_FRAM, "frame complete len:%d", |
492 | frame->v4l2_buf.bytesused); | |
493 | gspca_dev->image = NULL; | |
494 | gspca_dev->image_len = 0; | |
63eb9546 | 495 | } |
63eb9546 JFM |
496 | } |
497 | EXPORT_SYMBOL(gspca_frame_add); | |
498 | ||
d642de2e HG |
499 | static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file, |
500 | enum v4l2_memory memory, unsigned int count) | |
63eb9546 | 501 | { |
d43fa32f JFM |
502 | struct gspca_frame *frame; |
503 | unsigned int frsz; | |
504 | int i; | |
63eb9546 | 505 | |
1966bc2a | 506 | frsz = gspca_dev->pixfmt.sizeimage; |
63eb9546 | 507 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 508 | frsz = PAGE_ALIGN(frsz); |
f7059eaa JFM |
509 | if (count >= GSPCA_MAX_FRAMES) |
510 | count = GSPCA_MAX_FRAMES - 1; | |
e795d912 | 511 | gspca_dev->frbuf = vmalloc_32(frsz * count); |
ac0d6df6 | 512 | if (!gspca_dev->frbuf) { |
133a9fe9 | 513 | pr_err("frame alloc failed\n"); |
ac0d6df6 | 514 | return -ENOMEM; |
63eb9546 | 515 | } |
d642de2e HG |
516 | gspca_dev->capt_file = file; |
517 | gspca_dev->memory = memory; | |
518 | gspca_dev->frsz = frsz; | |
63eb9546 JFM |
519 | gspca_dev->nframes = count; |
520 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
521 | frame = &gspca_dev->frame[i]; |
522 | frame->v4l2_buf.index = i; | |
523 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
c21f0cb4 | 524 | frame->v4l2_buf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
d43fa32f JFM |
525 | frame->v4l2_buf.field = V4L2_FIELD_NONE; |
526 | frame->v4l2_buf.length = frsz; | |
d642de2e | 527 | frame->v4l2_buf.memory = memory; |
d43fa32f | 528 | frame->v4l2_buf.sequence = 0; |
b192ca98 | 529 | frame->data = gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 530 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 | 531 | } |
f7059eaa JFM |
532 | atomic_set(&gspca_dev->fr_q, 0); |
533 | atomic_set(&gspca_dev->fr_i, 0); | |
534 | gspca_dev->fr_o = 0; | |
d43fa32f | 535 | return 0; |
63eb9546 JFM |
536 | } |
537 | ||
538 | static void frame_free(struct gspca_dev *gspca_dev) | |
539 | { | |
540 | int i; | |
541 | ||
542 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 543 | if (gspca_dev->frbuf != NULL) { |
e795d912 | 544 | vfree(gspca_dev->frbuf); |
63eb9546 JFM |
545 | gspca_dev->frbuf = NULL; |
546 | for (i = 0; i < gspca_dev->nframes; i++) | |
547 | gspca_dev->frame[i].data = NULL; | |
548 | } | |
549 | gspca_dev->nframes = 0; | |
d642de2e HG |
550 | gspca_dev->frsz = 0; |
551 | gspca_dev->capt_file = NULL; | |
552 | gspca_dev->memory = GSPCA_MEMORY_NO; | |
63eb9546 JFM |
553 | } |
554 | ||
d43fa32f | 555 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
556 | { |
557 | struct urb *urb; | |
558 | unsigned int i; | |
559 | ||
560 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 561 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 562 | urb = gspca_dev->urb[i]; |
63eb9546 | 563 | if (urb == NULL) |
d43fa32f | 564 | break; |
63eb9546 | 565 | |
4aa0d037 | 566 | gspca_dev->urb[i] = NULL; |
090264e5 | 567 | usb_kill_urb(urb); |
8b2c3da1 WY |
568 | usb_free_coherent(gspca_dev->dev, |
569 | urb->transfer_buffer_length, | |
570 | urb->transfer_buffer, | |
571 | urb->transfer_dma); | |
63eb9546 JFM |
572 | usb_free_urb(urb); |
573 | } | |
63eb9546 JFM |
574 | } |
575 | ||
e4dac289 JFM |
576 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
577 | { | |
578 | int ret; | |
579 | ||
580 | if (gspca_dev->alt == 0) | |
581 | return 0; | |
582 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
583 | if (ret < 0) | |
133a9fe9 | 584 | pr_err("set alt 0 err %d\n", ret); |
e4dac289 JFM |
585 | return ret; |
586 | } | |
587 | ||
588 | /* Note: both the queue and the usb locks should be held when calling this */ | |
589 | static void gspca_stream_off(struct gspca_dev *gspca_dev) | |
590 | { | |
591 | gspca_dev->streaming = 0; | |
a3cc74d4 | 592 | gspca_dev->usb_err = 0; |
eb238732 HG |
593 | if (gspca_dev->sd_desc->stopN) |
594 | gspca_dev->sd_desc->stopN(gspca_dev); | |
595 | destroy_urbs(gspca_dev); | |
596 | gspca_input_destroy_urb(gspca_dev); | |
597 | gspca_set_alt0(gspca_dev); | |
598 | gspca_input_create_urb(gspca_dev); | |
e4dac289 JFM |
599 | if (gspca_dev->sd_desc->stop0) |
600 | gspca_dev->sd_desc->stop0(gspca_dev); | |
601 | PDEBUG(D_STREAM, "stream off OK"); | |
602 | } | |
603 | ||
63eb9546 | 604 | /* |
2fe15245 AO |
605 | * look for an input transfer endpoint in an alternate setting. |
606 | * | |
607 | * If xfer_ep is invalid, return the first valid ep found, otherwise | |
608 | * look for exactly the ep with address equal to xfer_ep. | |
63eb9546 | 609 | */ |
0be01004 | 610 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
2fe15245 | 611 | int xfer, int xfer_ep) |
63eb9546 JFM |
612 | { |
613 | struct usb_host_endpoint *ep; | |
614 | int i, attr; | |
615 | ||
63eb9546 JFM |
616 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
617 | ep = &alt->endpoint[i]; | |
50e06dee | 618 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 | 619 | if (attr == xfer |
7106225a | 620 | && ep->desc.wMaxPacketSize != 0 |
2fe15245 AO |
621 | && usb_endpoint_dir_in(&ep->desc) |
622 | && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) | |
50e06dee | 623 | return ep; |
63eb9546 JFM |
624 | } |
625 | return NULL; | |
626 | } | |
627 | ||
27b12023 JFM |
628 | /* compute the minimum bandwidth for the current transfer */ |
629 | static u32 which_bandwidth(struct gspca_dev *gspca_dev) | |
630 | { | |
631 | u32 bandwidth; | |
27b12023 | 632 | |
18bef42c | 633 | /* get the (max) image size */ |
1966bc2a | 634 | bandwidth = gspca_dev->pixfmt.sizeimage; |
27b12023 | 635 | |
18bef42c | 636 | /* if the image is compressed, estimate its mean size */ |
eb3fb7c9 | 637 | if (!gspca_dev->cam.needs_full_bandwidth && |
1966bc2a OZ |
638 | bandwidth < gspca_dev->pixfmt.width * |
639 | gspca_dev->pixfmt.height) | |
18bef42c | 640 | bandwidth = bandwidth * 3 / 8; /* 0.375 */ |
27b12023 JFM |
641 | |
642 | /* estimate the frame rate */ | |
643 | if (gspca_dev->sd_desc->get_streamparm) { | |
644 | struct v4l2_streamparm parm; | |
645 | ||
27b12023 JFM |
646 | gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm); |
647 | bandwidth *= parm.parm.capture.timeperframe.denominator; | |
1153f04d | 648 | bandwidth /= parm.parm.capture.timeperframe.numerator; |
27b12023 | 649 | } else { |
18bef42c JFM |
650 | |
651 | /* don't hope more than 15 fps with USB 1.1 and | |
652 | * image resolution >= 640x480 */ | |
1966bc2a | 653 | if (gspca_dev->pixfmt.width >= 640 |
18bef42c JFM |
654 | && gspca_dev->dev->speed == USB_SPEED_FULL) |
655 | bandwidth *= 15; /* 15 fps */ | |
656 | else | |
657 | bandwidth *= 30; /* 30 fps */ | |
27b12023 JFM |
658 | } |
659 | ||
660 | PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth); | |
661 | return bandwidth; | |
662 | } | |
663 | ||
664 | /* endpoint table */ | |
665 | #define MAX_ALT 16 | |
666 | struct ep_tb_s { | |
667 | u32 alt; | |
668 | u32 bandwidth; | |
669 | }; | |
670 | ||
63eb9546 | 671 | /* |
27b12023 JFM |
672 | * build the table of the endpoints |
673 | * and compute the minimum bandwidth for the image transfer | |
63eb9546 | 674 | */ |
66957b86 | 675 | static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, |
27b12023 | 676 | struct usb_interface *intf, |
27b12023 | 677 | struct ep_tb_s *ep_tb) |
63eb9546 | 678 | { |
63eb9546 | 679 | struct usb_host_endpoint *ep; |
27b12023 JFM |
680 | int i, j, nbalt, psize, found; |
681 | u32 bandwidth, last_bw; | |
63eb9546 | 682 | |
27b12023 JFM |
683 | nbalt = intf->num_altsetting; |
684 | if (nbalt > MAX_ALT) | |
685 | nbalt = MAX_ALT; /* fixme: should warn */ | |
686 | ||
687 | /* build the endpoint table */ | |
688 | i = 0; | |
689 | last_bw = 0; | |
690 | for (;;) { | |
691 | ep_tb->bandwidth = 2000 * 2000 * 120; | |
692 | found = 0; | |
693 | for (j = 0; j < nbalt; j++) { | |
66957b86 | 694 | ep = alt_xfer(&intf->altsetting[j], |
2fe15245 AO |
695 | USB_ENDPOINT_XFER_ISOC, |
696 | gspca_dev->xfer_ep); | |
27b12023 JFM |
697 | if (ep == NULL) |
698 | continue; | |
d0d3435b HG |
699 | if (ep->desc.bInterval == 0) { |
700 | pr_err("alt %d iso endp with 0 interval\n", j); | |
701 | continue; | |
702 | } | |
27b12023 | 703 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
66957b86 | 704 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); |
d0d3435b | 705 | bandwidth = psize * 1000; |
27b12023 | 706 | if (gspca_dev->dev->speed == USB_SPEED_HIGH |
8ad2d06f | 707 | || gspca_dev->dev->speed >= USB_SPEED_SUPER) |
27b12023 | 708 | bandwidth *= 8; |
d0d3435b | 709 | bandwidth /= 1 << (ep->desc.bInterval - 1); |
27b12023 JFM |
710 | if (bandwidth <= last_bw) |
711 | continue; | |
712 | if (bandwidth < ep_tb->bandwidth) { | |
713 | ep_tb->bandwidth = bandwidth; | |
714 | ep_tb->alt = j; | |
715 | found = 1; | |
716 | } | |
95d9142c | 717 | } |
27b12023 JFM |
718 | if (!found) |
719 | break; | |
720 | PDEBUG(D_STREAM, "alt %d bandwidth %d", | |
721 | ep_tb->alt, ep_tb->bandwidth); | |
722 | last_bw = ep_tb->bandwidth; | |
723 | i++; | |
724 | ep_tb++; | |
725 | } | |
726 | ||
2d39059a HG |
727 | /* |
728 | * If the camera: | |
729 | * has a usb audio class interface (a built in usb mic); and | |
730 | * is a usb 1 full speed device; and | |
731 | * uses the max full speed iso bandwidth; and | |
732 | * and has more than 1 alt setting | |
733 | * then skip the highest alt setting to spare bandwidth for the mic | |
734 | */ | |
735 | if (gspca_dev->audio && | |
736 | gspca_dev->dev->speed == USB_SPEED_FULL && | |
737 | last_bw >= 1000000 && | |
738 | i > 1) { | |
739 | PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt"); | |
740 | i--; | |
741 | ep_tb--; | |
742 | } | |
743 | ||
27b12023 JFM |
744 | /* get the requested bandwidth and start at the highest atlsetting */ |
745 | bandwidth = which_bandwidth(gspca_dev); | |
746 | ep_tb--; | |
747 | while (i > 1) { | |
748 | ep_tb--; | |
749 | if (ep_tb->bandwidth < bandwidth) | |
750 | break; | |
751 | i--; | |
63eb9546 | 752 | } |
27b12023 | 753 | return i; |
63eb9546 JFM |
754 | } |
755 | ||
756 | /* | |
0be01004 | 757 | * create the URBs for image transfer |
63eb9546 JFM |
758 | */ |
759 | static int create_urbs(struct gspca_dev *gspca_dev, | |
760 | struct usb_host_endpoint *ep) | |
761 | { | |
762 | struct urb *urb; | |
d43fa32f | 763 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
764 | |
765 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 766 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 767 | |
6929dc6b | 768 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
769 | |
770 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
771 | if (gspca_dev->pkt_size == 0) |
772 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
773 | else | |
774 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
775 | npkt = gspca_dev->cam.npkt; |
776 | if (npkt == 0) | |
777 | npkt = 32; /* default value */ | |
0be01004 JFM |
778 | bsize = psize * npkt; |
779 | PDEBUG(D_STREAM, | |
780 | "isoc %d pkts size %d = bsize:%d", | |
781 | npkt, psize, bsize); | |
51977a8d | 782 | nurbs = DEF_NURBS; |
95d9142c | 783 | } else { /* bulk */ |
0be01004 | 784 | npkt = 0; |
dff369aa | 785 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
786 | if (bsize == 0) |
787 | bsize = psize; | |
0be01004 | 788 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
789 | if (gspca_dev->cam.bulk_nurbs != 0) |
790 | nurbs = gspca_dev->cam.bulk_nurbs; | |
791 | else | |
792 | nurbs = 1; | |
0be01004 JFM |
793 | } |
794 | ||
d43fa32f | 795 | for (n = 0; n < nurbs; n++) { |
63eb9546 | 796 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
452b53f7 | 797 | if (!urb) |
63eb9546 | 798 | return -ENOMEM; |
db870875 | 799 | gspca_dev->urb[n] = urb; |
997ea58e | 800 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
63eb9546 JFM |
801 | bsize, |
802 | GFP_KERNEL, | |
803 | &urb->transfer_dma); | |
804 | ||
4aa0d037 | 805 | if (urb->transfer_buffer == NULL) { |
133a9fe9 | 806 | pr_err("usb_alloc_coherent failed\n"); |
63eb9546 JFM |
807 | return -ENOMEM; |
808 | } | |
63eb9546 JFM |
809 | urb->dev = gspca_dev->dev; |
810 | urb->context = gspca_dev; | |
63eb9546 | 811 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
812 | if (npkt != 0) { /* ISOC */ |
813 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
814 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
815 | urb->transfer_flags = URB_ISO_ASAP |
816 | | URB_NO_TRANSFER_DMA_MAP; | |
51e23be2 | 817 | urb->interval = 1 << (ep->desc.bInterval - 1); |
0be01004 JFM |
818 | urb->complete = isoc_irq; |
819 | urb->number_of_packets = npkt; | |
820 | for (i = 0; i < npkt; i++) { | |
821 | urb->iso_frame_desc[i].length = psize; | |
822 | urb->iso_frame_desc[i].offset = psize * i; | |
823 | } | |
824 | } else { /* bulk */ | |
825 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
a23c1947 | 826 | ep->desc.bEndpointAddress); |
6c49da7f | 827 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 828 | urb->complete = bulk_irq; |
63eb9546 JFM |
829 | } |
830 | } | |
831 | return 0; | |
832 | } | |
833 | ||
834 | /* | |
835 | * start the USB transfer | |
836 | */ | |
837 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
838 | { | |
27b12023 | 839 | struct usb_interface *intf; |
63eb9546 | 840 | struct usb_host_endpoint *ep; |
db870875 | 841 | struct urb *urb; |
27b12023 JFM |
842 | struct ep_tb_s ep_tb[MAX_ALT]; |
843 | int n, ret, xfer, alt, alt_idx; | |
63eb9546 | 844 | |
f7059eaa JFM |
845 | /* reset the streaming variables */ |
846 | gspca_dev->image = NULL; | |
847 | gspca_dev->image_len = 0; | |
848 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
849 | gspca_dev->sequence = 0; | |
850 | ||
ab6c8cf2 JFM |
851 | gspca_dev->usb_err = 0; |
852 | ||
27b12023 | 853 | /* do the specific subdriver stuff before endpoint selection */ |
47faa6f8 HG |
854 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); |
855 | gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0; | |
1f53b0b0 JFM |
856 | if (gspca_dev->sd_desc->isoc_init) { |
857 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
858 | if (ret < 0) | |
a3d6e8cc | 859 | return ret; |
1f53b0b0 | 860 | } |
27b12023 JFM |
861 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
862 | : USB_ENDPOINT_XFER_ISOC; | |
314b3e08 | 863 | |
66957b86 | 864 | /* if bulk or the subdriver forced an altsetting, get the endpoint */ |
27b12023 JFM |
865 | if (gspca_dev->alt != 0) { |
866 | gspca_dev->alt--; /* (previous version compatibility) */ | |
2fe15245 AO |
867 | ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer, |
868 | gspca_dev->xfer_ep); | |
27b12023 JFM |
869 | if (ep == NULL) { |
870 | pr_err("bad altsetting %d\n", gspca_dev->alt); | |
a3d6e8cc | 871 | return -EIO; |
27b12023 JFM |
872 | } |
873 | ep_tb[0].alt = gspca_dev->alt; | |
874 | alt_idx = 1; | |
875 | } else { | |
59234e59 AO |
876 | /* else, compute the minimum bandwidth |
877 | * and build the endpoint table */ | |
66957b86 | 878 | alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb); |
27b12023 JFM |
879 | if (alt_idx <= 0) { |
880 | pr_err("no transfer endpoint found\n"); | |
a3d6e8cc | 881 | return -EIO; |
27b12023 | 882 | } |
1f53b0b0 | 883 | } |
27b12023 JFM |
884 | |
885 | /* set the highest alternate setting and | |
886 | * loop until urb submit succeeds */ | |
887 | gspca_input_destroy_urb(gspca_dev); | |
888 | ||
889 | gspca_dev->alt = ep_tb[--alt_idx].alt; | |
890 | alt = -1; | |
63eb9546 | 891 | for (;;) { |
27b12023 JFM |
892 | if (alt != gspca_dev->alt) { |
893 | alt = gspca_dev->alt; | |
6121ca57 | 894 | if (intf->num_altsetting > 1) { |
27b12023 JFM |
895 | ret = usb_set_interface(gspca_dev->dev, |
896 | gspca_dev->iface, | |
897 | alt); | |
898 | if (ret < 0) { | |
4274d84c JFM |
899 | if (ret == -ENOSPC) |
900 | goto retry; /*fixme: ugly*/ | |
27b12023 JFM |
901 | pr_err("set alt %d err %d\n", alt, ret); |
902 | goto out; | |
903 | } | |
904 | } | |
905 | } | |
47aaca96 | 906 | if (!gspca_dev->cam.no_urb_create) { |
27b12023 JFM |
907 | PDEBUG(D_STREAM, "init transfer alt %d", alt); |
908 | ret = create_urbs(gspca_dev, | |
2fe15245 AO |
909 | alt_xfer(&intf->altsetting[alt], xfer, |
910 | gspca_dev->xfer_ep)); | |
47aaca96 JFM |
911 | if (ret < 0) { |
912 | destroy_urbs(gspca_dev); | |
913 | goto out; | |
914 | } | |
db870875 | 915 | } |
63eb9546 | 916 | |
8fe2f1d5 | 917 | /* clear the bulk endpoint */ |
6929dc6b | 918 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 919 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 920 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 921 | |
63eb9546 | 922 | /* start the cam */ |
72ab97ce JFM |
923 | ret = gspca_dev->sd_desc->start(gspca_dev); |
924 | if (ret < 0) { | |
925 | destroy_urbs(gspca_dev); | |
926 | goto out; | |
927 | } | |
63eb9546 | 928 | gspca_dev->streaming = 1; |
82b343b2 | 929 | v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); |
63eb9546 | 930 | |
dff369aa | 931 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 932 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
933 | break; |
934 | ||
63eb9546 | 935 | /* submit the URBs */ |
db870875 JFM |
936 | for (n = 0; n < MAX_NURBS; n++) { |
937 | urb = gspca_dev->urb[n]; | |
938 | if (urb == NULL) | |
939 | break; | |
940 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
941 | if (ret < 0) |
942 | break; | |
63eb9546 JFM |
943 | } |
944 | if (ret >= 0) | |
27b12023 JFM |
945 | break; /* transfer is started */ |
946 | ||
947 | /* something when wrong | |
948 | * stop the webcam and free the transfer resources */ | |
e4dac289 | 949 | gspca_stream_off(gspca_dev); |
4bdf4a83 | 950 | if (ret != -ENOSPC) { |
133a9fe9 JP |
951 | pr_err("usb_submit_urb alt %d err %d\n", |
952 | gspca_dev->alt, ret); | |
1f53b0b0 | 953 | goto out; |
4bdf4a83 | 954 | } |
1f53b0b0 JFM |
955 | |
956 | /* the bandwidth is not wide enough | |
25985edc | 957 | * negotiate or try a lower alternate setting */ |
4274d84c | 958 | retry: |
c93396e1 | 959 | PERR("alt %d - bandwidth not wide enough, trying again", alt); |
1f53b0b0 JFM |
960 | msleep(20); /* wait for kill complete */ |
961 | if (gspca_dev->sd_desc->isoc_nego) { | |
962 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
963 | if (ret < 0) | |
964 | goto out; | |
965 | } else { | |
27b12023 JFM |
966 | if (alt_idx <= 0) { |
967 | pr_err("no transfer endpoint found\n"); | |
1f53b0b0 JFM |
968 | ret = -EIO; |
969 | goto out; | |
970 | } | |
ac97ecc8 | 971 | gspca_dev->alt = ep_tb[--alt_idx].alt; |
1f53b0b0 | 972 | } |
63eb9546 JFM |
973 | } |
974 | out: | |
314b3e08 | 975 | gspca_input_create_urb(gspca_dev); |
63eb9546 JFM |
976 | return ret; |
977 | } | |
978 | ||
d43fa32f | 979 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
980 | { |
981 | int i; | |
982 | ||
983 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
984 | gspca_dev->curr_mode = i; | |
1966bc2a | 985 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i]; |
6a33091f | 986 | |
62bba5dd HV |
987 | /* does nothing if ctrl_handler == NULL */ |
988 | v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); | |
63eb9546 JFM |
989 | } |
990 | ||
b3f18ec6 AO |
991 | static int wxh_to_mode(struct gspca_dev *gspca_dev, |
992 | int width, int height) | |
993 | { | |
994 | int i; | |
995 | ||
996 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
997 | if (width == gspca_dev->cam.cam_mode[i].width | |
998 | && height == gspca_dev->cam.cam_mode[i].height) | |
999 | return i; | |
1000 | } | |
1001 | return -EINVAL; | |
1002 | } | |
1003 | ||
9a08e461 | 1004 | static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1005 | int width, int height) |
1006 | { | |
1007 | int i; | |
1008 | ||
d43fa32f JFM |
1009 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
1010 | if (width >= gspca_dev->cam.cam_mode[i].width | |
1011 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
1012 | break; |
1013 | } | |
63eb9546 JFM |
1014 | return i; |
1015 | } | |
1016 | ||
63eb9546 JFM |
1017 | /* |
1018 | * search a mode with the right pixel format | |
1019 | */ | |
1020 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
1021 | int mode, | |
1022 | int pixfmt) | |
1023 | { | |
1024 | int modeU, modeD; | |
1025 | ||
1026 | modeU = modeD = mode; | |
1027 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
1028 | if (--modeD >= 0) { | |
c2446b3e JFM |
1029 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
1030 | == pixfmt) | |
63eb9546 JFM |
1031 | return modeD; |
1032 | } | |
1033 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
1034 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
1035 | == pixfmt) | |
63eb9546 JFM |
1036 | return modeU; |
1037 | } | |
1038 | } | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | ||
af1d9afa | 1042 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
b1c85cc0 HV |
1043 | static int vidioc_g_chip_info(struct file *file, void *priv, |
1044 | struct v4l2_dbg_chip_info *chip) | |
af1d9afa | 1045 | { |
f4c1605a | 1046 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af1d9afa | 1047 | |
8c4ebae4 | 1048 | gspca_dev->usb_err = 0; |
b1c85cc0 HV |
1049 | if (gspca_dev->sd_desc->get_chip_info) |
1050 | return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); | |
1051 | return chip->match.addr ? -EINVAL : 0; | |
af1d9afa BJ |
1052 | } |
1053 | ||
b1c85cc0 HV |
1054 | static int vidioc_g_register(struct file *file, void *priv, |
1055 | struct v4l2_dbg_register *reg) | |
af1d9afa | 1056 | { |
f4c1605a | 1057 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af1d9afa | 1058 | |
8c4ebae4 | 1059 | gspca_dev->usb_err = 0; |
b1c85cc0 | 1060 | return gspca_dev->sd_desc->get_register(gspca_dev, reg); |
af1d9afa | 1061 | } |
af1d9afa | 1062 | |
b1c85cc0 HV |
1063 | static int vidioc_s_register(struct file *file, void *priv, |
1064 | const struct v4l2_dbg_register *reg) | |
af1d9afa | 1065 | { |
f4c1605a | 1066 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af1d9afa | 1067 | |
8c4ebae4 | 1068 | gspca_dev->usb_err = 0; |
b1c85cc0 | 1069 | return gspca_dev->sd_desc->set_register(gspca_dev, reg); |
af1d9afa | 1070 | } |
b1c85cc0 | 1071 | #endif |
af1d9afa | 1072 | |
e078770a | 1073 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1074 | struct v4l2_fmtdesc *fmtdesc) |
1075 | { | |
f4c1605a | 1076 | struct gspca_dev *gspca_dev = video_drvdata(file); |
6a7eba24 | 1077 | int i, j, index; |
63eb9546 JFM |
1078 | __u32 fmt_tb[8]; |
1079 | ||
63eb9546 JFM |
1080 | /* give an index to each format */ |
1081 | index = 0; | |
1082 | j = 0; | |
1083 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 1084 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
1085 | j = 0; |
1086 | for (;;) { | |
1087 | if (fmt_tb[j] == fmt_tb[index]) | |
1088 | break; | |
1089 | j++; | |
1090 | } | |
1091 | if (j == index) { | |
1092 | if (fmtdesc->index == index) | |
1093 | break; /* new format */ | |
1094 | index++; | |
80297125 | 1095 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
1096 | return -EINVAL; |
1097 | } | |
1098 | } | |
1099 | if (i < 0) | |
1100 | return -EINVAL; /* no more format */ | |
1101 | ||
63eb9546 | 1102 | fmtdesc->pixelformat = fmt_tb[index]; |
b796fb6e JFM |
1103 | if (gspca_dev->cam.cam_mode[i].sizeimage < |
1104 | gspca_dev->cam.cam_mode[i].width * | |
1105 | gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
1106 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; |
1107 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
1108 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
1109 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
1110 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
1111 | fmtdesc->description[4] = '\0'; | |
1112 | return 0; | |
1113 | } | |
1114 | ||
e078770a | 1115 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1116 | struct v4l2_format *fmt) |
1117 | { | |
f4c1605a | 1118 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1119 | |
1966bc2a | 1120 | fmt->fmt.pix = gspca_dev->pixfmt; |
d52e2381 LP |
1121 | /* some drivers use priv internally, zero it before giving it back to |
1122 | the core */ | |
ac3322b0 | 1123 | fmt->fmt.pix.priv = 0; |
63eb9546 JFM |
1124 | return 0; |
1125 | } | |
1126 | ||
e078770a | 1127 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1128 | struct v4l2_format *fmt) |
1129 | { | |
24c530b4 | 1130 | int w, h, mode, mode2; |
63eb9546 | 1131 | |
4aa0d037 JFM |
1132 | w = fmt->fmt.pix.width; |
1133 | h = fmt->fmt.pix.height; | |
d43fa32f | 1134 | |
c93396e1 TK |
1135 | PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap", |
1136 | fmt->fmt.pix.pixelformat, w, h); | |
1137 | ||
9a08e461 AO |
1138 | /* search the nearest mode for width and height */ |
1139 | mode = wxh_to_nearest_mode(gspca_dev, w, h); | |
63eb9546 JFM |
1140 | |
1141 | /* OK if right palette */ | |
c2446b3e JFM |
1142 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1143 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
1144 | |
1145 | /* else, search the closest mode with the same pixel format */ | |
1146 | mode2 = gspca_get_mode(gspca_dev, mode, | |
1147 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 1148 | if (mode2 >= 0) |
63eb9546 | 1149 | mode = mode2; |
63eb9546 | 1150 | } |
ac3322b0 | 1151 | fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; |
7d687af4 OZ |
1152 | if (gspca_dev->sd_desc->try_fmt) { |
1153 | /* pass original resolution to subdriver try_fmt */ | |
1154 | fmt->fmt.pix.width = w; | |
1155 | fmt->fmt.pix.height = h; | |
1156 | gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); | |
1157 | } | |
d52e2381 LP |
1158 | /* some drivers use priv internally, zero it before giving it back to |
1159 | the core */ | |
ac3322b0 | 1160 | fmt->fmt.pix.priv = 0; |
63eb9546 JFM |
1161 | return mode; /* used when s_fmt */ |
1162 | } | |
1163 | ||
e078770a | 1164 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
1165 | void *priv, |
1166 | struct v4l2_format *fmt) | |
1167 | { | |
f4c1605a | 1168 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1169 | int ret; |
1170 | ||
e078770a | 1171 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1172 | if (ret < 0) |
1173 | return ret; | |
1174 | return 0; | |
1175 | } | |
1176 | ||
e078770a | 1177 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1178 | struct v4l2_format *fmt) |
1179 | { | |
f4c1605a | 1180 | struct gspca_dev *gspca_dev = video_drvdata(file); |
d43fa32f | 1181 | int ret; |
63eb9546 | 1182 | |
e2997a72 HG |
1183 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1184 | return -ERESTARTSYS; | |
d43fa32f | 1185 | |
e078770a | 1186 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1187 | if (ret < 0) |
1188 | goto out; | |
1189 | ||
d43fa32f JFM |
1190 | if (gspca_dev->nframes != 0 |
1191 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
1192 | ret = -EINVAL; | |
1193 | goto out; | |
1194 | } | |
1195 | ||
d43fa32f JFM |
1196 | if (gspca_dev->streaming) { |
1197 | ret = -EBUSY; | |
1198 | goto out; | |
e2997a72 | 1199 | } |
63eb9546 | 1200 | gspca_dev->curr_mode = ret; |
7d687af4 OZ |
1201 | if (gspca_dev->sd_desc->try_fmt) |
1202 | /* subdriver try_fmt can modify format parameters */ | |
1203 | gspca_dev->pixfmt = fmt->fmt.pix; | |
1204 | else | |
1205 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret]; | |
d43fa32f | 1206 | |
d43fa32f | 1207 | ret = 0; |
63eb9546 JFM |
1208 | out: |
1209 | mutex_unlock(&gspca_dev->queue_lock); | |
1210 | return ret; | |
1211 | } | |
1212 | ||
11c635a2 HG |
1213 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1214 | struct v4l2_frmsizeenum *fsize) | |
1215 | { | |
f4c1605a | 1216 | struct gspca_dev *gspca_dev = video_drvdata(file); |
11c635a2 HG |
1217 | int i; |
1218 | __u32 index = 0; | |
1219 | ||
7d687af4 OZ |
1220 | if (gspca_dev->sd_desc->enum_framesizes) |
1221 | return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); | |
1222 | ||
11c635a2 HG |
1223 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { |
1224 | if (fsize->pixel_format != | |
1225 | gspca_dev->cam.cam_mode[i].pixelformat) | |
1226 | continue; | |
1227 | ||
1228 | if (fsize->index == index) { | |
1229 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1230 | fsize->discrete.width = | |
1231 | gspca_dev->cam.cam_mode[i].width; | |
1232 | fsize->discrete.height = | |
1233 | gspca_dev->cam.cam_mode[i].height; | |
1234 | return 0; | |
1235 | } | |
1236 | index++; | |
1237 | } | |
1238 | ||
1239 | return -EINVAL; | |
1240 | } | |
1241 | ||
28ffe77f AO |
1242 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1243 | struct v4l2_frmivalenum *fival) | |
1244 | { | |
f4c1605a | 1245 | struct gspca_dev *gspca_dev = video_drvdata(filp); |
b3f18ec6 | 1246 | int mode; |
28ffe77f AO |
1247 | __u32 i; |
1248 | ||
b3f18ec6 AO |
1249 | mode = wxh_to_mode(gspca_dev, fival->width, fival->height); |
1250 | if (mode < 0) | |
1251 | return -EINVAL; | |
1252 | ||
28ffe77f AO |
1253 | if (gspca_dev->cam.mode_framerates == NULL || |
1254 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
1255 | return -EINVAL; | |
1256 | ||
1257 | if (fival->pixel_format != | |
1258 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1259 | return -EINVAL; | |
1260 | ||
1261 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1262 | if (fival->index == i) { | |
c0925ba3 | 1263 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
28ffe77f AO |
1264 | fival->discrete.numerator = 1; |
1265 | fival->discrete.denominator = | |
1266 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1267 | return 0; | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | return -EINVAL; | |
1272 | } | |
1273 | ||
a3d6e8cc | 1274 | static void gspca_release(struct v4l2_device *v4l2_device) |
6b060ffe | 1275 | { |
a3d6e8cc HV |
1276 | struct gspca_dev *gspca_dev = |
1277 | container_of(v4l2_device, struct gspca_dev, v4l2_dev); | |
6b060ffe | 1278 | |
62bba5dd | 1279 | v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); |
2333565d | 1280 | v4l2_device_unregister(&gspca_dev->v4l2_dev); |
6b060ffe FZ |
1281 | kfree(gspca_dev->usb_buf); |
1282 | kfree(gspca_dev); | |
1283 | } | |
1284 | ||
bec43661 | 1285 | static int dev_open(struct file *file) |
63eb9546 | 1286 | { |
f4c1605a | 1287 | struct gspca_dev *gspca_dev = video_drvdata(file); |
b563a0d0 | 1288 | int ret; |
63eb9546 | 1289 | |
0d07e240 | 1290 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
5c4fa002 JFM |
1291 | |
1292 | /* protect the subdriver against rmmod */ | |
7f6eb118 HG |
1293 | if (!try_module_get(gspca_dev->module)) |
1294 | return -ENODEV; | |
6b060ffe | 1295 | |
b563a0d0 AK |
1296 | ret = v4l2_fh_open(file); |
1297 | if (ret) | |
1298 | module_put(gspca_dev->module); | |
1299 | return ret; | |
63eb9546 JFM |
1300 | } |
1301 | ||
bec43661 | 1302 | static int dev_close(struct file *file) |
63eb9546 | 1303 | { |
f4c1605a | 1304 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1305 | |
0d07e240 | 1306 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
a3d6e8cc HV |
1307 | |
1308 | /* Needed for gspca_stream_off, always lock before queue_lock! */ | |
1309 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
e2997a72 | 1310 | return -ERESTARTSYS; |
e2997a72 | 1311 | |
a3d6e8cc HV |
1312 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) { |
1313 | mutex_unlock(&gspca_dev->usb_lock); | |
1314 | return -ERESTARTSYS; | |
1315 | } | |
1316 | ||
5b77ae77 | 1317 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1318 | if (gspca_dev->capt_file == file) { |
a3cc74d4 | 1319 | if (gspca_dev->streaming) |
a1e8288b | 1320 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1321 | frame_free(gspca_dev); |
4aa0d037 | 1322 | } |
5c4fa002 | 1323 | module_put(gspca_dev->module); |
63eb9546 | 1324 | mutex_unlock(&gspca_dev->queue_lock); |
a3d6e8cc | 1325 | mutex_unlock(&gspca_dev->usb_lock); |
6b060ffe | 1326 | |
d43fa32f | 1327 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1328 | |
2333565d | 1329 | return v4l2_fh_release(file); |
63eb9546 JFM |
1330 | } |
1331 | ||
1332 | static int vidioc_querycap(struct file *file, void *priv, | |
1333 | struct v4l2_capability *cap) | |
1334 | { | |
f4c1605a | 1335 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1336 | |
e7d712cc | 1337 | strlcpy((char *) cap->driver, gspca_dev->sd_desc->name, |
d8518590 | 1338 | sizeof cap->driver); |
c6edaf16 | 1339 | if (gspca_dev->dev->product != NULL) { |
e7d712cc | 1340 | strlcpy((char *) cap->card, gspca_dev->dev->product, |
c6edaf16 JFM |
1341 | sizeof cap->card); |
1342 | } else { | |
d8518590 | 1343 | snprintf((char *) cap->card, sizeof cap->card, |
c6edaf16 JFM |
1344 | "USB Camera (%04x:%04x)", |
1345 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1346 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1347 | } | |
d8518590 JFM |
1348 | usb_make_path(gspca_dev->dev, (char *) cap->bus_info, |
1349 | sizeof(cap->bus_info)); | |
cc7b6f25 | 1350 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
63eb9546 JFM |
1351 | | V4L2_CAP_STREAMING |
1352 | | V4L2_CAP_READWRITE; | |
cc7b6f25 | 1353 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
a3d6e8cc | 1354 | return 0; |
63eb9546 JFM |
1355 | } |
1356 | ||
63eb9546 JFM |
1357 | static int vidioc_enum_input(struct file *file, void *priv, |
1358 | struct v4l2_input *input) | |
1359 | { | |
f4c1605a | 1360 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1361 | |
1362 | if (input->index != 0) | |
1363 | return -EINVAL; | |
63eb9546 | 1364 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1365 | input->status = gspca_dev->cam.input_flags; |
e7d712cc | 1366 | strlcpy(input->name, gspca_dev->sd_desc->name, |
63eb9546 JFM |
1367 | sizeof input->name); |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1372 | { | |
1373 | *i = 0; | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1378 | { | |
1379 | if (i > 0) | |
1380 | return -EINVAL; | |
1381 | return (0); | |
1382 | } | |
1383 | ||
1384 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1385 | struct v4l2_requestbuffers *rb) | |
1386 | { | |
f4c1605a | 1387 | struct gspca_dev *gspca_dev = video_drvdata(file); |
832d0a91 | 1388 | int i, ret = 0, streaming; |
63eb9546 | 1389 | |
a2ba6f27 JFM |
1390 | i = rb->memory; /* (avoid compilation warning) */ |
1391 | switch (i) { | |
5b77ae77 | 1392 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1393 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1394 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1395 | break; |
d43fa32f | 1396 | default: |
63eb9546 | 1397 | return -EINVAL; |
d43fa32f | 1398 | } |
e2997a72 HG |
1399 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1400 | return -ERESTARTSYS; | |
d43fa32f | 1401 | |
5b77ae77 | 1402 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
ce5610bc | 1403 | && gspca_dev->memory != GSPCA_MEMORY_READ |
5b77ae77 | 1404 | && gspca_dev->memory != rb->memory) { |
4aa0d037 JFM |
1405 | ret = -EBUSY; |
1406 | goto out; | |
1407 | } | |
d43fa32f | 1408 | |
5b77ae77 JFM |
1409 | /* only one file may do the capture */ |
1410 | if (gspca_dev->capt_file != NULL | |
1411 | && gspca_dev->capt_file != file) { | |
1412 | ret = -EBUSY; | |
1413 | goto out; | |
1414 | } | |
1415 | ||
1416 | /* if allocated, the buffers must not be mapped */ | |
1417 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1418 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1419 | ret = -EBUSY; |
1420 | goto out; | |
1421 | } | |
5b77ae77 JFM |
1422 | } |
1423 | ||
1424 | /* stop streaming */ | |
832d0a91 JFM |
1425 | streaming = gspca_dev->streaming; |
1426 | if (streaming) { | |
5b77ae77 | 1427 | gspca_stream_off(gspca_dev); |
59929cef JFM |
1428 | |
1429 | /* Don't restart the stream when switching from read | |
1430 | * to mmap mode */ | |
1431 | if (gspca_dev->memory == GSPCA_MEMORY_READ) | |
1432 | streaming = 0; | |
5b77ae77 JFM |
1433 | } |
1434 | ||
1435 | /* free the previous allocated buffers, if any */ | |
d642de2e | 1436 | if (gspca_dev->nframes != 0) |
5b77ae77 | 1437 | frame_free(gspca_dev); |
5b77ae77 JFM |
1438 | if (rb->count == 0) /* unrequest */ |
1439 | goto out; | |
d642de2e | 1440 | ret = frame_alloc(gspca_dev, file, rb->memory, rb->count); |
5b77ae77 JFM |
1441 | if (ret == 0) { |
1442 | rb->count = gspca_dev->nframes; | |
832d0a91 JFM |
1443 | if (streaming) |
1444 | ret = gspca_init_transfer(gspca_dev); | |
4aa0d037 JFM |
1445 | } |
1446 | out: | |
63eb9546 JFM |
1447 | mutex_unlock(&gspca_dev->queue_lock); |
1448 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1449 | return ret; | |
1450 | } | |
1451 | ||
1452 | static int vidioc_querybuf(struct file *file, void *priv, | |
1453 | struct v4l2_buffer *v4l2_buf) | |
1454 | { | |
f4c1605a | 1455 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1456 | struct gspca_frame *frame; |
1457 | ||
3a70c3fb | 1458 | if (v4l2_buf->index >= gspca_dev->nframes) |
63eb9546 JFM |
1459 | return -EINVAL; |
1460 | ||
1461 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1462 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | static int vidioc_streamon(struct file *file, void *priv, | |
1467 | enum v4l2_buf_type buf_type) | |
1468 | { | |
f4c1605a | 1469 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1470 | int ret; |
1471 | ||
63eb9546 JFM |
1472 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1473 | return -EINVAL; | |
e2997a72 HG |
1474 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1475 | return -ERESTARTSYS; | |
090264e5 | 1476 | |
18bf99aa JFM |
1477 | /* check the capture file */ |
1478 | if (gspca_dev->capt_file != file) { | |
1479 | ret = -EBUSY; | |
1480 | goto out; | |
1481 | } | |
1482 | ||
1edabe71 JFM |
1483 | if (gspca_dev->nframes == 0 |
1484 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1485 | ret = -EINVAL; |
1486 | goto out; | |
1487 | } | |
1488 | if (!gspca_dev->streaming) { | |
1489 | ret = gspca_init_transfer(gspca_dev); | |
1490 | if (ret < 0) | |
1491 | goto out; | |
1492 | } | |
1966bc2a OZ |
1493 | PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK", |
1494 | gspca_dev->pixfmt.pixelformat, | |
1495 | gspca_dev->pixfmt.width, gspca_dev->pixfmt.height); | |
e2997a72 | 1496 | ret = 0; |
63eb9546 JFM |
1497 | out: |
1498 | mutex_unlock(&gspca_dev->queue_lock); | |
1499 | return ret; | |
1500 | } | |
1501 | ||
1502 | static int vidioc_streamoff(struct file *file, void *priv, | |
1503 | enum v4l2_buf_type buf_type) | |
1504 | { | |
f4c1605a | 1505 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af05ef01 | 1506 | int i, ret; |
63eb9546 | 1507 | |
63eb9546 JFM |
1508 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1509 | return -EINVAL; | |
4e770f76 | 1510 | |
4aa0d037 JFM |
1511 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1512 | return -ERESTARTSYS; | |
5b77ae77 | 1513 | |
4e770f76 HG |
1514 | if (!gspca_dev->streaming) { |
1515 | ret = 0; | |
1516 | goto out; | |
1517 | } | |
1518 | ||
18bf99aa JFM |
1519 | /* check the capture file */ |
1520 | if (gspca_dev->capt_file != file) { | |
1521 | ret = -EBUSY; | |
1522 | goto out; | |
1523 | } | |
1524 | ||
5b77ae77 | 1525 | /* stop streaming */ |
4aa0d037 | 1526 | gspca_stream_off(gspca_dev); |
0d0ae15d HG |
1527 | /* In case another thread is waiting in dqbuf */ |
1528 | wake_up_interruptible(&gspca_dev->wq); | |
5b77ae77 | 1529 | |
f7059eaa | 1530 | /* empty the transfer queues */ |
af05ef01 HG |
1531 | for (i = 0; i < gspca_dev->nframes; i++) |
1532 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
f7059eaa JFM |
1533 | atomic_set(&gspca_dev->fr_q, 0); |
1534 | atomic_set(&gspca_dev->fr_i, 0); | |
1535 | gspca_dev->fr_o = 0; | |
5b77ae77 | 1536 | ret = 0; |
4aa0d037 JFM |
1537 | out: |
1538 | mutex_unlock(&gspca_dev->queue_lock); | |
1539 | return ret; | |
63eb9546 JFM |
1540 | } |
1541 | ||
1542 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1543 | struct v4l2_jpegcompression *jpegcomp) | |
1544 | { | |
f4c1605a | 1545 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1546 | |
8c4ebae4 | 1547 | gspca_dev->usb_err = 0; |
a3d6e8cc | 1548 | return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
63eb9546 JFM |
1549 | } |
1550 | ||
1551 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
d88aab53 | 1552 | const struct v4l2_jpegcompression *jpegcomp) |
63eb9546 | 1553 | { |
f4c1605a | 1554 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1555 | |
8c4ebae4 | 1556 | gspca_dev->usb_err = 0; |
a3d6e8cc | 1557 | return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); |
63eb9546 JFM |
1558 | } |
1559 | ||
1560 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1561 | struct v4l2_streamparm *parm) | |
1562 | { | |
f4c1605a | 1563 | struct gspca_dev *gspca_dev = video_drvdata(filp); |
63eb9546 | 1564 | |
63eb9546 | 1565 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1566 | |
1567 | if (gspca_dev->sd_desc->get_streamparm) { | |
a3d6e8cc HV |
1568 | gspca_dev->usb_err = 0; |
1569 | gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); | |
1570 | return gspca_dev->usb_err; | |
627a5ef7 | 1571 | } |
63eb9546 JFM |
1572 | return 0; |
1573 | } | |
1574 | ||
1575 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1576 | struct v4l2_streamparm *parm) | |
1577 | { | |
f4c1605a | 1578 | struct gspca_dev *gspca_dev = video_drvdata(filp); |
c7e5a726 | 1579 | unsigned int n; |
63eb9546 | 1580 | |
63eb9546 | 1581 | n = parm->parm.capture.readbuffers; |
f7059eaa | 1582 | if (n == 0 || n >= GSPCA_MAX_FRAMES) |
63eb9546 JFM |
1583 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
1584 | else | |
1585 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1586 | |
1587 | if (gspca_dev->sd_desc->set_streamparm) { | |
a3d6e8cc HV |
1588 | gspca_dev->usb_err = 0; |
1589 | gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); | |
1590 | return gspca_dev->usb_err; | |
627a5ef7 JP |
1591 | } |
1592 | ||
63eb9546 JFM |
1593 | return 0; |
1594 | } | |
1595 | ||
63eb9546 JFM |
1596 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) |
1597 | { | |
f4c1605a | 1598 | struct gspca_dev *gspca_dev = video_drvdata(file); |
efab8211 | 1599 | struct gspca_frame *frame; |
63eb9546 JFM |
1600 | struct page *page; |
1601 | unsigned long addr, start, size; | |
1602 | int i, ret; | |
63eb9546 JFM |
1603 | |
1604 | start = vma->vm_start; | |
1605 | size = vma->vm_end - vma->vm_start; | |
1606 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1607 | ||
e2997a72 HG |
1608 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1609 | return -ERESTARTSYS; | |
4aa0d037 JFM |
1610 | if (gspca_dev->capt_file != file) { |
1611 | ret = -EINVAL; | |
1612 | goto out; | |
63eb9546 JFM |
1613 | } |
1614 | ||
efab8211 | 1615 | frame = NULL; |
63eb9546 JFM |
1616 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1617 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1618 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1619 | break; | |
1620 | } | |
1621 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1622 | == vma->vm_pgoff) { | |
1623 | frame = &gspca_dev->frame[i]; | |
1624 | break; | |
1625 | } | |
1626 | } | |
efab8211 | 1627 | if (frame == NULL) { |
63eb9546 JFM |
1628 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1629 | ret = -EINVAL; | |
4aa0d037 | 1630 | goto out; |
63eb9546 | 1631 | } |
38bff697 | 1632 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1633 | PDEBUG(D_STREAM, "mmap bad size"); |
1634 | ret = -EINVAL; | |
4aa0d037 | 1635 | goto out; |
63eb9546 JFM |
1636 | } |
1637 | ||
1638 | /* | |
1639 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1640 | * device. It also prevents the region from being core dumped. | |
1641 | */ | |
1642 | vma->vm_flags |= VM_IO; | |
1643 | ||
1644 | addr = (unsigned long) frame->data; | |
1645 | while (size > 0) { | |
1646 | page = vmalloc_to_page((void *) addr); | |
1647 | ret = vm_insert_page(vma, start, page); | |
1648 | if (ret < 0) | |
4aa0d037 | 1649 | goto out; |
63eb9546 JFM |
1650 | start += PAGE_SIZE; |
1651 | addr += PAGE_SIZE; | |
1652 | size -= PAGE_SIZE; | |
1653 | } | |
1654 | ||
d50e257e | 1655 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1656 | vma->vm_private_data = frame; |
1657 | gspca_vm_open(vma); | |
e2997a72 | 1658 | ret = 0; |
4aa0d037 | 1659 | out: |
63eb9546 JFM |
1660 | mutex_unlock(&gspca_dev->queue_lock); |
1661 | return ret; | |
1662 | } | |
1663 | ||
27074efa HG |
1664 | static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file, |
1665 | enum v4l2_memory memory) | |
1666 | { | |
1667 | if (!gspca_dev->present) | |
1668 | return -ENODEV; | |
1669 | if (gspca_dev->capt_file != file || gspca_dev->memory != memory || | |
1670 | !gspca_dev->streaming) | |
1671 | return -EINVAL; | |
1672 | ||
1673 | /* check if a frame is ready */ | |
1674 | return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i); | |
1675 | } | |
1676 | ||
1677 | static int frame_ready(struct gspca_dev *gspca_dev, struct file *file, | |
1678 | enum v4l2_memory memory) | |
1679 | { | |
1680 | int ret; | |
1681 | ||
1682 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1683 | return -ERESTARTSYS; | |
1684 | ret = frame_ready_nolock(gspca_dev, file, memory); | |
1685 | mutex_unlock(&gspca_dev->queue_lock); | |
1686 | return ret; | |
1687 | } | |
1688 | ||
63eb9546 | 1689 | /* |
27074efa | 1690 | * dequeue a video buffer |
63eb9546 | 1691 | * |
27074efa | 1692 | * If nonblock_ing is false, block until a buffer is available. |
63eb9546 | 1693 | */ |
27074efa HG |
1694 | static int vidioc_dqbuf(struct file *file, void *priv, |
1695 | struct v4l2_buffer *v4l2_buf) | |
63eb9546 | 1696 | { |
f4c1605a | 1697 | struct gspca_dev *gspca_dev = video_drvdata(file); |
27074efa HG |
1698 | struct gspca_frame *frame; |
1699 | int i, j, ret; | |
63eb9546 | 1700 | |
27074efa HG |
1701 | PDEBUG(D_FRAM, "dqbuf"); |
1702 | ||
1703 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1704 | return -ERESTARTSYS; | |
1705 | ||
1706 | for (;;) { | |
1707 | ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory); | |
1708 | if (ret < 0) | |
1709 | goto out; | |
1710 | if (ret > 0) | |
1711 | break; | |
1712 | ||
1713 | mutex_unlock(&gspca_dev->queue_lock); | |
1714 | ||
1715 | if (file->f_flags & O_NONBLOCK) | |
181b704f HG |
1716 | return -EAGAIN; |
1717 | ||
1718 | /* wait till a frame is ready */ | |
4aa0d037 | 1719 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
27074efa | 1720 | frame_ready(gspca_dev, file, v4l2_buf->memory), |
181b704f HG |
1721 | msecs_to_jiffies(3000)); |
1722 | if (ret < 0) | |
1723 | return ret; | |
27074efa | 1724 | if (ret == 0) |
e2997a72 | 1725 | return -EIO; |
27074efa HG |
1726 | |
1727 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1728 | return -ERESTARTSYS; | |
63eb9546 | 1729 | } |
181b704f | 1730 | |
27074efa HG |
1731 | i = gspca_dev->fr_o; |
1732 | j = gspca_dev->fr_queue[i]; | |
1733 | frame = &gspca_dev->frame[j]; | |
1734 | ||
f7059eaa | 1735 | gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; |
e2997a72 | 1736 | |
4a82bc60 HG |
1737 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1738 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1739 | PDEBUG(D_FRAM, "dqbuf %d", j); | |
1740 | ret = 0; | |
1741 | ||
ac0d6df6 | 1742 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1743 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1744 | frame->data, |
1745 | frame->v4l2_buf.bytesused)) { | |
c93396e1 | 1746 | PERR("dqbuf cp to user failed"); |
ac0d6df6 | 1747 | ret = -EFAULT; |
ac0d6df6 JFM |
1748 | } |
1749 | } | |
4aa0d037 | 1750 | out: |
27074efa | 1751 | mutex_unlock(&gspca_dev->queue_lock); |
a3d6e8cc HV |
1752 | |
1753 | if (ret == 0 && gspca_dev->sd_desc->dq_callback) { | |
1754 | mutex_lock(&gspca_dev->usb_lock); | |
1755 | gspca_dev->usb_err = 0; | |
1756 | if (gspca_dev->present) | |
1757 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
1758 | mutex_unlock(&gspca_dev->usb_lock); | |
1759 | } | |
1760 | ||
63eb9546 JFM |
1761 | return ret; |
1762 | } | |
1763 | ||
1764 | /* | |
1765 | * queue a video buffer | |
1766 | * | |
1767 | * Attempting to queue a buffer that has already been | |
1768 | * queued will return -EINVAL. | |
1769 | */ | |
1770 | static int vidioc_qbuf(struct file *file, void *priv, | |
1771 | struct v4l2_buffer *v4l2_buf) | |
1772 | { | |
f4c1605a | 1773 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1774 | struct gspca_frame *frame; |
1775 | int i, index, ret; | |
1776 | ||
1777 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1778 | |
5b77ae77 JFM |
1779 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1780 | return -ERESTARTSYS; | |
1781 | ||
63eb9546 JFM |
1782 | index = v4l2_buf->index; |
1783 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1784 | PDEBUG(D_FRAM, |
63eb9546 | 1785 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1786 | ret = -EINVAL; |
1787 | goto out; | |
63eb9546 | 1788 | } |
5b77ae77 | 1789 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1790 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1791 | ret = -EINVAL; |
1792 | goto out; | |
63eb9546 | 1793 | } |
e2997a72 | 1794 | |
5b77ae77 | 1795 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1796 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1797 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1798 | ret = -EINVAL; |
1799 | goto out; | |
1800 | } | |
1801 | ||
1802 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1803 | |
d43fa32f | 1804 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1805 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1806 | frame->v4l2_buf.length = v4l2_buf->length; | |
1807 | } | |
1808 | ||
1809 | /* put the buffer in the 'queued' queue */ | |
f7059eaa | 1810 | i = atomic_read(&gspca_dev->fr_q); |
63eb9546 | 1811 | gspca_dev->fr_queue[i] = index; |
f7059eaa | 1812 | atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); |
63eb9546 JFM |
1813 | |
1814 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1815 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1816 | ret = 0; | |
1817 | out: | |
1818 | mutex_unlock(&gspca_dev->queue_lock); | |
1819 | return ret; | |
1820 | } | |
1821 | ||
d43fa32f JFM |
1822 | /* |
1823 | * allocate the resources for read() | |
1824 | */ | |
1825 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1826 | struct file *file) | |
63eb9546 | 1827 | { |
63eb9546 | 1828 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1829 | int i, ret; |
63eb9546 | 1830 | |
d43fa32f | 1831 | PDEBUG(D_STREAM, "read alloc"); |
a3d6e8cc HV |
1832 | |
1833 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1834 | return -ERESTARTSYS; | |
1835 | ||
63eb9546 JFM |
1836 | if (gspca_dev->nframes == 0) { |
1837 | struct v4l2_requestbuffers rb; | |
1838 | ||
1839 | memset(&rb, 0, sizeof rb); | |
1840 | rb.count = gspca_dev->nbufread; | |
1841 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1842 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1843 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1844 | if (ret != 0) { | |
d43fa32f | 1845 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
a3d6e8cc | 1846 | goto out; |
63eb9546 JFM |
1847 | } |
1848 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1849 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1850 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1851 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1852 | v4l2_buf.index = i; | |
63eb9546 JFM |
1853 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1854 | if (ret != 0) { | |
1855 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
a3d6e8cc | 1856 | goto out; |
63eb9546 JFM |
1857 | } |
1858 | } | |
d43fa32f | 1859 | } |
4aa0d037 | 1860 | |
d43fa32f JFM |
1861 | /* start streaming */ |
1862 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1863 | if (ret != 0) | |
1864 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
a3d6e8cc HV |
1865 | out: |
1866 | mutex_unlock(&gspca_dev->usb_lock); | |
d43fa32f JFM |
1867 | return ret; |
1868 | } | |
1869 | ||
1870 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1871 | { | |
f4c1605a | 1872 | struct gspca_dev *gspca_dev = video_drvdata(file); |
a2d887c5 HG |
1873 | unsigned long req_events = poll_requested_events(wait); |
1874 | int ret = 0; | |
d43fa32f JFM |
1875 | |
1876 | PDEBUG(D_FRAM, "poll"); | |
1877 | ||
a2d887c5 HG |
1878 | if (req_events & POLLPRI) |
1879 | ret |= v4l2_ctrl_poll(file, wait); | |
d43fa32f | 1880 | |
a2d887c5 HG |
1881 | if (req_events & (POLLIN | POLLRDNORM)) { |
1882 | /* if reqbufs is not done, the user would use read() */ | |
1883 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { | |
1884 | if (read_alloc(gspca_dev, file) != 0) { | |
1885 | ret |= POLLERR; | |
1886 | goto out; | |
1887 | } | |
1888 | } | |
63eb9546 | 1889 | |
a2d887c5 | 1890 | poll_wait(file, &gspca_dev->wq, wait); |
d43fa32f | 1891 | |
a2d887c5 HG |
1892 | /* check if an image has been received */ |
1893 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) { | |
1894 | ret |= POLLERR; | |
1895 | goto out; | |
1896 | } | |
1897 | if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) | |
1898 | ret |= POLLIN | POLLRDNORM; | |
1899 | mutex_unlock(&gspca_dev->queue_lock); | |
1900 | } | |
1901 | ||
1902 | out: | |
090264e5 | 1903 | if (!gspca_dev->present) |
a2d887c5 HG |
1904 | ret |= POLLHUP; |
1905 | ||
d43fa32f JFM |
1906 | return ret; |
1907 | } | |
1908 | ||
1909 | static ssize_t dev_read(struct file *file, char __user *data, | |
1910 | size_t count, loff_t *ppos) | |
1911 | { | |
f4c1605a | 1912 | struct gspca_dev *gspca_dev = video_drvdata(file); |
d43fa32f JFM |
1913 | struct gspca_frame *frame; |
1914 | struct v4l2_buffer v4l2_buf; | |
1915 | struct timeval timestamp; | |
82643d0e | 1916 | int n, ret, ret2; |
d43fa32f | 1917 | |
a9e11134 | 1918 | PDEBUG(D_FRAM, "read (%zd)", count); |
ee362991 | 1919 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */ |
d43fa32f JFM |
1920 | ret = read_alloc(gspca_dev, file); |
1921 | if (ret != 0) | |
1922 | return ret; | |
d43fa32f JFM |
1923 | } |
1924 | ||
63eb9546 | 1925 | /* get a frame */ |
5ba0e2c3 | 1926 | v4l2_get_timestamp(×tamp); |
63eb9546 | 1927 | timestamp.tv_sec--; |
82643d0e JFM |
1928 | n = 2; |
1929 | for (;;) { | |
63eb9546 JFM |
1930 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1931 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1932 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1933 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1934 | if (ret != 0) { | |
1935 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1936 | return ret; | |
1937 | } | |
1938 | ||
1939 | /* if the process slept for more than 1 second, | |
219423c1 | 1940 | * get a newer frame */ |
63eb9546 | 1941 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1942 | if (--n < 0) |
1943 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1944 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1945 | break; | |
1946 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1947 | if (ret != 0) { | |
1948 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1949 | return ret; | |
1950 | } | |
1951 | } | |
1952 | ||
1953 | /* copy the frame */ | |
ac0d6df6 JFM |
1954 | if (count > frame->v4l2_buf.bytesused) |
1955 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1956 | ret = copy_to_user(data, frame->data, count); |
1957 | if (ret != 0) { | |
c93396e1 | 1958 | PERR("read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1959 | ret = -EFAULT; |
1960 | goto out; | |
1961 | } | |
1962 | ret = count; | |
1963 | out: | |
1964 | /* in each case, requeue the buffer */ | |
1965 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1966 | if (ret2 != 0) | |
1967 | return ret2; | |
1968 | return ret; | |
1969 | } | |
1970 | ||
bec43661 | 1971 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
1972 | .owner = THIS_MODULE, |
1973 | .open = dev_open, | |
1974 | .release = dev_close, | |
1975 | .read = dev_read, | |
1976 | .mmap = dev_mmap, | |
bec43661 | 1977 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
1978 | .poll = dev_poll, |
1979 | }; | |
1980 | ||
a399810c | 1981 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1982 | .vidioc_querycap = vidioc_querycap, |
1983 | .vidioc_dqbuf = vidioc_dqbuf, | |
1984 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1985 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1986 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1987 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1988 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 | 1989 | .vidioc_streamon = vidioc_streamon, |
63eb9546 JFM |
1990 | .vidioc_enum_input = vidioc_enum_input, |
1991 | .vidioc_g_input = vidioc_g_input, | |
1992 | .vidioc_s_input = vidioc_s_input, | |
1993 | .vidioc_reqbufs = vidioc_reqbufs, | |
1994 | .vidioc_querybuf = vidioc_querybuf, | |
1995 | .vidioc_streamoff = vidioc_streamoff, | |
1996 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1997 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1998 | .vidioc_g_parm = vidioc_g_parm, | |
1999 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2000 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2001 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa | 2002 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
b1c85cc0 | 2003 | .vidioc_g_chip_info = vidioc_g_chip_info, |
af1d9afa BJ |
2004 | .vidioc_g_register = vidioc_g_register, |
2005 | .vidioc_s_register = vidioc_s_register, | |
2006 | #endif | |
d57fb9f8 HV |
2007 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
2008 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
63eb9546 JFM |
2009 | }; |
2010 | ||
59929cef | 2011 | static const struct video_device gspca_template = { |
a399810c | 2012 | .name = "gspca main driver", |
a399810c HV |
2013 | .fops = &dev_fops, |
2014 | .ioctl_ops = &dev_ioctl_ops, | |
a3d6e8cc | 2015 | .release = video_device_release_empty, /* We use v4l2_dev.release */ |
a399810c HV |
2016 | }; |
2017 | ||
63eb9546 JFM |
2018 | /* |
2019 | * probe and create a new gspca device | |
2020 | * | |
2021 | * This function must be called by the sub-driver when it is | |
2022 | * called for probing a new device. | |
2023 | */ | |
4462864d | 2024 | int gspca_dev_probe2(struct usb_interface *intf, |
63eb9546 JFM |
2025 | const struct usb_device_id *id, |
2026 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2027 | int dev_size, |
2028 | struct module *module) | |
63eb9546 | 2029 | { |
63eb9546 JFM |
2030 | struct gspca_dev *gspca_dev; |
2031 | struct usb_device *dev = interface_to_usbdev(intf); | |
2032 | int ret; | |
63eb9546 | 2033 | |
ee7dd4e0 JFM |
2034 | pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n", |
2035 | sd_desc->name, id->idVendor, id->idProduct); | |
63eb9546 | 2036 | |
63eb9546 JFM |
2037 | /* create the device */ |
2038 | if (dev_size < sizeof *gspca_dev) | |
2039 | dev_size = sizeof *gspca_dev; | |
2040 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2041 | if (!gspca_dev) { |
133a9fe9 | 2042 | pr_err("couldn't kzalloc gspca struct\n"); |
e293e599 | 2043 | return -ENOMEM; |
63eb9546 | 2044 | } |
8295d99e JFM |
2045 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2046 | if (!gspca_dev->usb_buf) { | |
133a9fe9 | 2047 | pr_err("out of memory\n"); |
e293e599 | 2048 | ret = -ENOMEM; |
8295d99e JFM |
2049 | goto out; |
2050 | } | |
63eb9546 | 2051 | gspca_dev->dev = dev; |
4462864d | 2052 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
2fe15245 | 2053 | gspca_dev->xfer_ep = -1; |
35680baa JFM |
2054 | |
2055 | /* check if any audio device */ | |
5dae603d | 2056 | if (dev->actconfig->desc.bNumInterfaces != 1) { |
35680baa JFM |
2057 | int i; |
2058 | struct usb_interface *intf2; | |
2059 | ||
5dae603d HG |
2060 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
2061 | intf2 = dev->actconfig->interface[i]; | |
35680baa JFM |
2062 | if (intf2 != NULL |
2063 | && intf2->altsetting != NULL | |
2064 | && intf2->altsetting->desc.bInterfaceClass == | |
2065 | USB_CLASS_AUDIO) { | |
2066 | gspca_dev->audio = 1; | |
2067 | break; | |
2068 | } | |
2069 | } | |
2070 | } | |
2071 | ||
a3d6e8cc | 2072 | gspca_dev->v4l2_dev.release = gspca_release; |
2333565d HV |
2073 | ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev); |
2074 | if (ret) | |
2075 | goto out; | |
63eb9546 | 2076 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2077 | gspca_dev->nbufread = 2; |
ff374747 | 2078 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
62bba5dd | 2079 | gspca_dev->vdev = gspca_template; |
2333565d | 2080 | gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; |
f4c1605a | 2081 | video_set_drvdata(&gspca_dev->vdev, gspca_dev); |
62bba5dd HV |
2082 | gspca_dev->module = module; |
2083 | gspca_dev->present = 1; | |
2084 | ||
2085 | mutex_init(&gspca_dev->usb_lock); | |
a3d6e8cc | 2086 | gspca_dev->vdev.lock = &gspca_dev->usb_lock; |
62bba5dd HV |
2087 | mutex_init(&gspca_dev->queue_lock); |
2088 | init_waitqueue_head(&gspca_dev->wq); | |
63eb9546 | 2089 | |
012d6b02 | 2090 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2091 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2092 | if (ret < 0) |
2093 | goto out; | |
ba38ee8e | 2094 | ret = sd_desc->init(gspca_dev); |
62bba5dd HV |
2095 | if (ret < 0) |
2096 | goto out; | |
2097 | if (sd_desc->init_controls) | |
2098 | ret = sd_desc->init_controls(gspca_dev); | |
63eb9546 JFM |
2099 | if (ret < 0) |
2100 | goto out; | |
2101 | gspca_set_default_mode(gspca_dev); | |
2102 | ||
10ee2402 HG |
2103 | ret = gspca_input_connect(gspca_dev); |
2104 | if (ret) | |
2105 | goto out; | |
2106 | ||
a3d6e8cc HV |
2107 | /* |
2108 | * Don't take usb_lock for these ioctls. This improves latency if | |
2109 | * usb_lock is taken for a long time, e.g. when changing a control | |
2110 | * value, and a new frame is ready to be dequeued. | |
2111 | */ | |
152a3a73 HV |
2112 | v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF); |
2113 | v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF); | |
2114 | v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF); | |
ac3322b0 | 2115 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
b1c85cc0 | 2116 | if (!gspca_dev->sd_desc->get_register) |
ac3322b0 | 2117 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); |
b1c85cc0 | 2118 | if (!gspca_dev->sd_desc->set_register) |
ac3322b0 HV |
2119 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); |
2120 | #endif | |
2121 | if (!gspca_dev->sd_desc->get_jcomp) | |
2122 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP); | |
2123 | if (!gspca_dev->sd_desc->set_jcomp) | |
2124 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP); | |
a3d6e8cc | 2125 | |
63eb9546 | 2126 | /* init video stuff */ |
a12ca6a6 | 2127 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2128 | VFL_TYPE_GRABBER, |
8d584a53 | 2129 | -1); |
63eb9546 | 2130 | if (ret < 0) { |
133a9fe9 | 2131 | pr_err("video_register_device err %d\n", ret); |
63eb9546 JFM |
2132 | goto out; |
2133 | } | |
2134 | ||
63eb9546 | 2135 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2136 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
0274d42e | 2137 | |
10ee2402 | 2138 | gspca_input_create_urb(gspca_dev); |
0274d42e | 2139 | |
63eb9546 JFM |
2140 | return 0; |
2141 | out: | |
13a00fab | 2142 | #if IS_ENABLED(CONFIG_INPUT) |
10ee2402 HG |
2143 | if (gspca_dev->input_dev) |
2144 | input_unregister_device(gspca_dev->input_dev); | |
e7637521 | 2145 | #endif |
62bba5dd | 2146 | v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); |
e07a1d8a JFM |
2147 | kfree(gspca_dev->usb_buf); |
2148 | kfree(gspca_dev); | |
63eb9546 JFM |
2149 | return ret; |
2150 | } | |
4462864d JFM |
2151 | EXPORT_SYMBOL(gspca_dev_probe2); |
2152 | ||
2153 | /* same function as the previous one, but check the interface */ | |
2154 | int gspca_dev_probe(struct usb_interface *intf, | |
2155 | const struct usb_device_id *id, | |
2156 | const struct sd_desc *sd_desc, | |
2157 | int dev_size, | |
2158 | struct module *module) | |
2159 | { | |
2160 | struct usb_device *dev = interface_to_usbdev(intf); | |
2161 | ||
2162 | /* we don't handle multi-config cameras */ | |
2163 | if (dev->descriptor.bNumConfigurations != 1) { | |
133a9fe9 JP |
2164 | pr_err("%04x:%04x too many config\n", |
2165 | id->idVendor, id->idProduct); | |
4462864d JFM |
2166 | return -ENODEV; |
2167 | } | |
2168 | ||
2169 | /* the USB video interface must be the first one */ | |
5dae603d | 2170 | if (dev->actconfig->desc.bNumInterfaces != 1 |
c4dc692c | 2171 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
4462864d | 2172 | return -ENODEV; |
4462864d JFM |
2173 | |
2174 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); | |
2175 | } | |
63eb9546 JFM |
2176 | EXPORT_SYMBOL(gspca_dev_probe); |
2177 | ||
2178 | /* | |
2179 | * USB disconnection | |
2180 | * | |
2181 | * This function must be called by the sub-driver | |
2182 | * when the device disconnects, after the specific resources are freed. | |
2183 | */ | |
2184 | void gspca_disconnect(struct usb_interface *intf) | |
2185 | { | |
4aa0d037 | 2186 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
13a00fab | 2187 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e | 2188 | struct input_dev *input_dev; |
e070bf9e | 2189 | #endif |
63eb9546 | 2190 | |
38c7c036 LP |
2191 | PDEBUG(D_PROBE, "%s disconnect", |
2192 | video_device_node_name(&gspca_dev->vdev)); | |
a3d6e8cc | 2193 | |
ad28127d | 2194 | mutex_lock(&gspca_dev->usb_lock); |
4e770f76 | 2195 | |
6e4ae872 | 2196 | gspca_dev->present = 0; |
4e770f76 | 2197 | destroy_urbs(gspca_dev); |
090264e5 | 2198 | |
13a00fab | 2199 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e MN |
2200 | gspca_input_destroy_urb(gspca_dev); |
2201 | input_dev = gspca_dev->input_dev; | |
2202 | if (input_dev) { | |
2203 | gspca_dev->input_dev = NULL; | |
2204 | input_unregister_device(input_dev); | |
2205 | } | |
e070bf9e | 2206 | #endif |
eb238732 HG |
2207 | /* Free subdriver's streaming resources / stop sd workqueue(s) */ |
2208 | if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming) | |
2209 | gspca_dev->sd_desc->stop0(gspca_dev); | |
2210 | gspca_dev->streaming = 0; | |
345321dc | 2211 | gspca_dev->dev = NULL; |
eb238732 | 2212 | wake_up_interruptible(&gspca_dev->wq); |
0274d42e | 2213 | |
2333565d | 2214 | v4l2_device_disconnect(&gspca_dev->v4l2_dev); |
a3d6e8cc | 2215 | video_unregister_device(&gspca_dev->vdev); |
090264e5 | 2216 | |
a3d6e8cc | 2217 | mutex_unlock(&gspca_dev->usb_lock); |
6b060ffe | 2218 | |
25985edc | 2219 | /* (this will call gspca_release() immediately or on last close) */ |
a3d6e8cc | 2220 | v4l2_device_put(&gspca_dev->v4l2_dev); |
63eb9546 JFM |
2221 | } |
2222 | EXPORT_SYMBOL(gspca_disconnect); | |
2223 | ||
6a709749 JFM |
2224 | #ifdef CONFIG_PM |
2225 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2226 | { | |
2227 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2228 | ||
36adfca9 HG |
2229 | gspca_input_destroy_urb(gspca_dev); |
2230 | ||
6a709749 JFM |
2231 | if (!gspca_dev->streaming) |
2232 | return 0; | |
36adfca9 | 2233 | |
a3d6e8cc | 2234 | mutex_lock(&gspca_dev->usb_lock); |
6a709749 | 2235 | gspca_dev->frozen = 1; /* avoid urb error messages */ |
9a190c85 | 2236 | gspca_dev->usb_err = 0; |
012d6b02 JFM |
2237 | if (gspca_dev->sd_desc->stopN) |
2238 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
2239 | destroy_urbs(gspca_dev); |
2240 | gspca_set_alt0(gspca_dev); | |
a3d6e8cc | 2241 | if (gspca_dev->sd_desc->stop0) |
012d6b02 | 2242 | gspca_dev->sd_desc->stop0(gspca_dev); |
a3d6e8cc | 2243 | mutex_unlock(&gspca_dev->usb_lock); |
36adfca9 | 2244 | |
6a709749 JFM |
2245 | return 0; |
2246 | } | |
2247 | EXPORT_SYMBOL(gspca_suspend); | |
2248 | ||
2249 | int gspca_resume(struct usb_interface *intf) | |
2250 | { | |
2251 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
254902b0 | 2252 | int streaming, ret = 0; |
6a709749 | 2253 | |
a3d6e8cc | 2254 | mutex_lock(&gspca_dev->usb_lock); |
6a709749 | 2255 | gspca_dev->frozen = 0; |
9a190c85 | 2256 | gspca_dev->usb_err = 0; |
012d6b02 | 2257 | gspca_dev->sd_desc->init(gspca_dev); |
62bba5dd HV |
2258 | /* |
2259 | * Most subdrivers send all ctrl values on sd_start and thus | |
2260 | * only write to the device registers on s_ctrl when streaming -> | |
2261 | * Clear streaming to avoid setting all ctrls twice. | |
2262 | */ | |
2263 | streaming = gspca_dev->streaming; | |
2264 | gspca_dev->streaming = 0; | |
a3d6e8cc | 2265 | if (streaming) |
254902b0 | 2266 | ret = gspca_init_transfer(gspca_dev); |
36adfca9 HG |
2267 | else |
2268 | gspca_input_create_urb(gspca_dev); | |
a3d6e8cc | 2269 | mutex_unlock(&gspca_dev->usb_lock); |
36adfca9 | 2270 | |
254902b0 | 2271 | return ret; |
6a709749 JFM |
2272 | } |
2273 | EXPORT_SYMBOL(gspca_resume); | |
2274 | #endif | |
dcef3237 | 2275 | |
63eb9546 JFM |
2276 | /* -- module insert / remove -- */ |
2277 | static int __init gspca_init(void) | |
2278 | { | |
f22123fa | 2279 | pr_info("v" GSPCA_VERSION " registered\n"); |
63eb9546 JFM |
2280 | return 0; |
2281 | } | |
2282 | static void __exit gspca_exit(void) | |
2283 | { | |
63eb9546 JFM |
2284 | } |
2285 | ||
2286 | module_init(gspca_init); | |
2287 | module_exit(gspca_exit); | |
2288 | ||
2289 | module_param_named(debug, gspca_debug, int, 0644); | |
2290 | MODULE_PARM_DESC(debug, | |
c93396e1 | 2291 | "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo"); |