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Commit | Line | Data |
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a6c2ba28 | 1 | /* |
f7abcd38 | 2 | em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices |
a6c2ba28 | 3 | |
f7abcd38 MCC |
4 | Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> |
5 | Markus Rechberger <mrechberger@gmail.com> | |
2e7c6dc3 | 6 | Mauro Carvalho Chehab <mchehab@infradead.org> |
f7abcd38 | 7 | Sascha Sommer <saschasommer@freenet.de> |
a6c2ba28 | 8 | |
439090d7 MCC |
9 | Some parts based on SN9C10x PC Camera Controllers GPL driver made |
10 | by Luca Risolia <luca.risolia@studio.unibo.it> | |
11 | ||
a6c2ba28 | 12 | This program is free software; you can redistribute it and/or modify |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 2 of the License, or | |
15 | (at your option) any later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software | |
24 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | */ | |
26 | ||
27 | #include <linux/init.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/kernel.h> | |
e5589bef | 31 | #include <linux/bitmap.h> |
a6c2ba28 | 32 | #include <linux/usb.h> |
a6c2ba28 | 33 | #include <linux/i2c.h> |
b296fc60 | 34 | #include <linux/version.h> |
6d35c8f6 | 35 | #include <linux/mm.h> |
a6c2ba28 | 36 | #include <linux/video_decoder.h> |
1e4baed3 | 37 | #include <linux/mutex.h> |
a6c2ba28 | 38 | |
f7abcd38 | 39 | #include "em28xx.h" |
c0477ad9 | 40 | #include <media/v4l2-common.h> |
2474ed44 | 41 | #include <media/msp3400.h> |
a6c2ba28 | 42 | |
f7abcd38 MCC |
43 | #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ |
44 | "Markus Rechberger <mrechberger@gmail.com>, " \ | |
2e7c6dc3 | 45 | "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ |
f7abcd38 | 46 | "Sascha Sommer <saschasommer@freenet.de>" |
a6c2ba28 | 47 | |
f7abcd38 MCC |
48 | #define DRIVER_NAME "em28xx" |
49 | #define DRIVER_DESC "Empia em28xx based USB video device driver" | |
3acf2809 | 50 | #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 0, 1) |
a6c2ba28 | 51 | |
3acf2809 | 52 | #define em28xx_videodbg(fmt, arg...) do {\ |
4ac97914 MCC |
53 | if (video_debug) \ |
54 | printk(KERN_INFO "%s %s :"fmt, \ | |
f85c657f | 55 | dev->name, __FUNCTION__ , ##arg); } while (0) |
a6c2ba28 | 56 | |
57 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
58 | MODULE_DESCRIPTION(DRIVER_DESC); | |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
3acf2809 | 61 | static LIST_HEAD(em28xx_devlist); |
9c75541f | 62 | |
9d4d9c05 | 63 | static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; |
e5589bef MCC |
64 | static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; |
65 | static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; | |
596d92d5 | 66 | module_param_array(card, int, NULL, 0444); |
e5589bef MCC |
67 | module_param_array(video_nr, int, NULL, 0444); |
68 | module_param_array(vbi_nr, int, NULL, 0444); | |
596d92d5 | 69 | MODULE_PARM_DESC(card,"card type"); |
e5589bef MCC |
70 | MODULE_PARM_DESC(video_nr,"video device numbers"); |
71 | MODULE_PARM_DESC(vbi_nr,"vbi device numbers"); | |
596d92d5 | 72 | |
a6c2ba28 | 73 | static unsigned int video_debug = 0; |
74 | module_param(video_debug,int,0644); | |
75 | MODULE_PARM_DESC(video_debug,"enable debug messages [video]"); | |
76 | ||
e5589bef MCC |
77 | /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */ |
78 | static unsigned long em28xx_devused; | |
79 | ||
a6c2ba28 | 80 | /* supported tv norms */ |
3acf2809 | 81 | static struct em28xx_tvnorm tvnorms[] = { |
a6c2ba28 | 82 | { |
83 | .name = "PAL", | |
84 | .id = V4L2_STD_PAL, | |
85 | .mode = VIDEO_MODE_PAL, | |
86 | }, { | |
87 | .name = "NTSC", | |
88 | .id = V4L2_STD_NTSC, | |
89 | .mode = VIDEO_MODE_NTSC, | |
90 | }, { | |
91 | .name = "SECAM", | |
92 | .id = V4L2_STD_SECAM, | |
93 | .mode = VIDEO_MODE_SECAM, | |
94 | }, { | |
95 | .name = "PAL-M", | |
96 | .id = V4L2_STD_PAL_M, | |
97 | .mode = VIDEO_MODE_PAL, | |
98 | } | |
99 | }; | |
100 | ||
101 | #define TVNORMS ARRAY_SIZE(tvnorms) | |
102 | ||
103 | /* supported controls */ | |
c0477ad9 | 104 | /* Common to all boards */ |
3acf2809 | 105 | static struct v4l2_queryctrl em28xx_qctrl[] = { |
c0477ad9 MCC |
106 | { |
107 | .id = V4L2_CID_AUDIO_VOLUME, | |
108 | .type = V4L2_CTRL_TYPE_INTEGER, | |
109 | .name = "Volume", | |
110 | .minimum = 0x0, | |
111 | .maximum = 0x1f, | |
112 | .step = 0x1, | |
113 | .default_value = 0x1f, | |
114 | .flags = 0, | |
115 | },{ | |
116 | .id = V4L2_CID_AUDIO_MUTE, | |
117 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
118 | .name = "Mute", | |
119 | .minimum = 0, | |
120 | .maximum = 1, | |
121 | .step = 1, | |
122 | .default_value = 1, | |
123 | .flags = 0, | |
124 | } | |
125 | }; | |
126 | ||
3acf2809 | 127 | static struct usb_driver em28xx_usb_driver; |
a6c2ba28 | 128 | |
1e4baed3 | 129 | static DEFINE_MUTEX(em28xx_sysfs_lock); |
3acf2809 | 130 | static DECLARE_RWSEM(em28xx_disconnect); |
a6c2ba28 | 131 | |
132 | /********************* v4l2 interface ******************************************/ | |
133 | ||
a6c2ba28 | 134 | /* |
3acf2809 | 135 | * em28xx_config() |
a6c2ba28 | 136 | * inits registers with sane defaults |
137 | */ | |
3acf2809 | 138 | static int em28xx_config(struct em28xx *dev) |
a6c2ba28 | 139 | { |
140 | ||
141 | /* Sets I2C speed to 100 KHz */ | |
2b2c93ac SS |
142 | if (!dev->is_em2800) |
143 | em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1); | |
a6c2ba28 | 144 | |
145 | /* enable vbi capturing */ | |
e5589bef | 146 | |
9475fb1c MR |
147 | /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */ |
148 | /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */ | |
e5589bef MCC |
149 | em28xx_write_regs_req(dev,0x00,0x11,"\x51",1); |
150 | ||
3acf2809 | 151 | em28xx_audio_usb_mute(dev, 1); |
a6c2ba28 | 152 | dev->mute = 1; /* maybe not the right place... */ |
153 | dev->volume = 0x1f; | |
3acf2809 MCC |
154 | em28xx_audio_analog_set(dev); |
155 | em28xx_audio_analog_setup(dev); | |
156 | em28xx_outfmt_set_yuv422(dev); | |
157 | em28xx_colorlevels_set_default(dev); | |
158 | em28xx_compression_disable(dev); | |
a6c2ba28 | 159 | |
160 | return 0; | |
161 | } | |
162 | ||
163 | /* | |
3acf2809 | 164 | * em28xx_config_i2c() |
a6c2ba28 | 165 | * configure i2c attached devices |
166 | */ | |
943a4902 | 167 | static void em28xx_config_i2c(struct em28xx *dev) |
a6c2ba28 | 168 | { |
c7c0b34c HV |
169 | struct v4l2_routing route; |
170 | ||
171 | route.input = INPUT(dev->ctl_input)->vmux; | |
172 | route.output = 0; | |
663d1ba2 | 173 | em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL); |
c7c0b34c | 174 | em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); |
f5762e44 | 175 | em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL); |
a6c2ba28 | 176 | } |
177 | ||
178 | /* | |
3acf2809 | 179 | * em28xx_empty_framequeues() |
a6c2ba28 | 180 | * prepare queues for incoming and outgoing frames |
181 | */ | |
3acf2809 | 182 | static void em28xx_empty_framequeues(struct em28xx *dev) |
a6c2ba28 | 183 | { |
184 | u32 i; | |
185 | ||
186 | INIT_LIST_HEAD(&dev->inqueue); | |
187 | INIT_LIST_HEAD(&dev->outqueue); | |
188 | ||
3acf2809 | 189 | for (i = 0; i < EM28XX_NUM_FRAMES; i++) { |
a6c2ba28 | 190 | dev->frame[i].state = F_UNUSED; |
191 | dev->frame[i].buf.bytesused = 0; | |
192 | } | |
193 | } | |
194 | ||
eac94356 MCC |
195 | static void video_mux(struct em28xx *dev, int index) |
196 | { | |
c7c0b34c HV |
197 | int ainput; |
198 | struct v4l2_routing route; | |
eac94356 | 199 | |
c7c0b34c HV |
200 | route.input = INPUT(index)->vmux; |
201 | route.output = 0; | |
eac94356 MCC |
202 | dev->ctl_input = index; |
203 | dev->ctl_ainput = INPUT(index)->amux; | |
204 | ||
c7c0b34c | 205 | em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); |
eac94356 | 206 | |
c7c0b34c | 207 | em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput); |
eac94356 MCC |
208 | |
209 | if (dev->has_msp34xx) { | |
9bb13a6d MCC |
210 | if (dev->i2s_speed) |
211 | em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed); | |
2474ed44 | 212 | route.input = dev->ctl_ainput; |
07151724 | 213 | route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); |
2474ed44 HV |
214 | /* Note: this is msp3400 specific */ |
215 | em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route); | |
eac94356 MCC |
216 | ainput = EM28XX_AUDIO_SRC_TUNER; |
217 | em28xx_audio_source(dev, ainput); | |
218 | } else { | |
219 | switch (dev->ctl_ainput) { | |
9475fb1c MR |
220 | case 0: |
221 | ainput = EM28XX_AUDIO_SRC_TUNER; | |
222 | break; | |
223 | default: | |
224 | ainput = EM28XX_AUDIO_SRC_LINE; | |
eac94356 MCC |
225 | } |
226 | em28xx_audio_source(dev, ainput); | |
227 | } | |
228 | } | |
229 | ||
a6c2ba28 | 230 | /* |
3acf2809 | 231 | * em28xx_v4l2_open() |
a6c2ba28 | 232 | * inits the device and starts isoc transfer |
233 | */ | |
3acf2809 | 234 | static int em28xx_v4l2_open(struct inode *inode, struct file *filp) |
a6c2ba28 | 235 | { |
a6c2ba28 | 236 | int minor = iminor(inode); |
a6c2ba28 | 237 | int errCode = 0; |
3acf2809 | 238 | struct em28xx *h,*dev = NULL; |
9c75541f | 239 | |
a991f44b | 240 | list_for_each_entry(h, &em28xx_devlist, devlist) { |
9c75541f MR |
241 | if (h->vdev->minor == minor) { |
242 | dev = h; | |
e5589bef MCC |
243 | dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
244 | } | |
245 | if (h->vbi_dev->minor == minor) { | |
246 | dev = h; | |
247 | dev->type = V4L2_BUF_TYPE_VBI_CAPTURE; | |
9c75541f MR |
248 | } |
249 | } | |
e5589bef MCC |
250 | if (NULL == dev) |
251 | return -ENODEV; | |
9c75541f | 252 | |
e5589bef MCC |
253 | em28xx_videodbg("open minor=%d type=%s users=%d\n", |
254 | minor,v4l2_type_names[dev->type],dev->users); | |
a6c2ba28 | 255 | |
3acf2809 | 256 | if (!down_read_trylock(&em28xx_disconnect)) |
a6c2ba28 | 257 | return -ERESTARTSYS; |
258 | ||
259 | if (dev->users) { | |
3acf2809 MCC |
260 | em28xx_warn("this driver can be opened only once\n"); |
261 | up_read(&em28xx_disconnect); | |
a6c2ba28 | 262 | return -EBUSY; |
263 | } | |
264 | ||
3593cab5 | 265 | mutex_init(&dev->fileop_lock); /* to 1 == available */ |
a6c2ba28 | 266 | spin_lock_init(&dev->queue_lock); |
267 | init_waitqueue_head(&dev->wait_frame); | |
268 | init_waitqueue_head(&dev->wait_stream); | |
269 | ||
3593cab5 | 270 | mutex_lock(&dev->lock); |
a6c2ba28 | 271 | |
e5589bef MCC |
272 | if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
273 | em28xx_set_alternate(dev); | |
a6c2ba28 | 274 | |
e5589bef MCC |
275 | dev->width = norm_maxw(dev); |
276 | dev->height = norm_maxh(dev); | |
277 | dev->frame_size = dev->width * dev->height * 2; | |
278 | dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ | |
279 | dev->bytesperline = dev->width * 2; | |
280 | dev->hscale = 0; | |
281 | dev->vscale = 0; | |
a6c2ba28 | 282 | |
e5589bef MCC |
283 | em28xx_capture_start(dev, 1); |
284 | em28xx_resolution_set(dev); | |
a6c2ba28 | 285 | |
e5d4a56d MR |
286 | /* device needs to be initialized before isoc transfer */ |
287 | video_mux(dev, 0); | |
288 | ||
e5589bef MCC |
289 | /* start the transfer */ |
290 | errCode = em28xx_init_isoc(dev); | |
291 | if (errCode) | |
292 | goto err; | |
293 | ||
e5589bef | 294 | } |
a6c2ba28 | 295 | |
296 | dev->users++; | |
297 | filp->private_data = dev; | |
298 | dev->io = IO_NONE; | |
299 | dev->stream = STREAM_OFF; | |
300 | dev->num_frames = 0; | |
301 | ||
302 | /* prepare queues */ | |
3acf2809 | 303 | em28xx_empty_framequeues(dev); |
a6c2ba28 | 304 | |
305 | dev->state |= DEV_INITIALIZED; | |
306 | ||
3593cab5 IM |
307 | err: |
308 | mutex_unlock(&dev->lock); | |
3acf2809 | 309 | up_read(&em28xx_disconnect); |
a6c2ba28 | 310 | return errCode; |
311 | } | |
312 | ||
313 | /* | |
3acf2809 | 314 | * em28xx_realease_resources() |
a6c2ba28 | 315 | * unregisters the v4l2,i2c and usb devices |
316 | * called when the device gets disconected or at module unload | |
317 | */ | |
3acf2809 | 318 | static void em28xx_release_resources(struct em28xx *dev) |
a6c2ba28 | 319 | { |
1e4baed3 | 320 | mutex_lock(&em28xx_sysfs_lock); |
a6c2ba28 | 321 | |
e5589bef MCC |
322 | /*FIXME: I2C IR should be disconnected */ |
323 | ||
324 | em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n", | |
325 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, | |
326 | dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); | |
9c75541f | 327 | list_del(&dev->devlist); |
a6c2ba28 | 328 | video_unregister_device(dev->vdev); |
e5589bef | 329 | video_unregister_device(dev->vbi_dev); |
3acf2809 | 330 | em28xx_i2c_unregister(dev); |
a6c2ba28 | 331 | usb_put_dev(dev->udev); |
1e4baed3 | 332 | mutex_unlock(&em28xx_sysfs_lock); |
e5589bef MCC |
333 | |
334 | ||
335 | /* Mark device as unused */ | |
336 | em28xx_devused&=~(1<<dev->devno); | |
a6c2ba28 | 337 | } |
338 | ||
339 | /* | |
3acf2809 | 340 | * em28xx_v4l2_close() |
a6c2ba28 | 341 | * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls |
342 | */ | |
3acf2809 | 343 | static int em28xx_v4l2_close(struct inode *inode, struct file *filp) |
a6c2ba28 | 344 | { |
a6c2ba28 | 345 | int errCode; |
3acf2809 | 346 | struct em28xx *dev=filp->private_data; |
a6c2ba28 | 347 | |
eac94356 | 348 | em28xx_videodbg("users=%d\n", dev->users); |
a6c2ba28 | 349 | |
3593cab5 | 350 | mutex_lock(&dev->lock); |
a6c2ba28 | 351 | |
3acf2809 | 352 | em28xx_uninit_isoc(dev); |
a6c2ba28 | 353 | |
3acf2809 | 354 | em28xx_release_buffers(dev); |
a6c2ba28 | 355 | |
356 | /* the device is already disconnect, free the remaining resources */ | |
357 | if (dev->state & DEV_DISCONNECTED) { | |
3acf2809 | 358 | em28xx_release_resources(dev); |
3593cab5 | 359 | mutex_unlock(&dev->lock); |
a6c2ba28 | 360 | kfree(dev); |
361 | return 0; | |
362 | } | |
363 | ||
364 | /* set alternate 0 */ | |
365 | dev->alt = 0; | |
eac94356 | 366 | em28xx_videodbg("setting alternate 0\n"); |
a6c2ba28 | 367 | errCode = usb_set_interface(dev->udev, 0, 0); |
368 | if (errCode < 0) { | |
3acf2809 | 369 | em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n", |
a6c2ba28 | 370 | errCode); |
371 | } | |
372 | ||
373 | dev->users--; | |
374 | wake_up_interruptible_nr(&dev->open, 1); | |
3593cab5 | 375 | mutex_unlock(&dev->lock); |
a6c2ba28 | 376 | return 0; |
377 | } | |
378 | ||
379 | /* | |
3acf2809 | 380 | * em28xx_v4l2_read() |
a6c2ba28 | 381 | * will allocate buffers when called for the first time |
382 | */ | |
383 | static ssize_t | |
3acf2809 | 384 | em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count, |
a6c2ba28 | 385 | loff_t * f_pos) |
386 | { | |
3acf2809 | 387 | struct em28xx_frame_t *f, *i; |
a6c2ba28 | 388 | unsigned long lock_flags; |
389 | int ret = 0; | |
3acf2809 | 390 | struct em28xx *dev = filp->private_data; |
a6c2ba28 | 391 | |
e5589bef MCC |
392 | if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
393 | em28xx_videodbg("V4l2_Buf_type_videocapture is set\n"); | |
394 | } | |
395 | if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) { | |
396 | em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n"); | |
397 | em28xx_videodbg("not supported yet! ...\n"); | |
398 | if (copy_to_user(buf, "", 1)) { | |
3593cab5 | 399 | mutex_unlock(&dev->fileop_lock); |
e5589bef MCC |
400 | return -EFAULT; |
401 | } | |
402 | return (1); | |
403 | } | |
404 | if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) { | |
405 | em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n"); | |
406 | em28xx_videodbg("not supported yet! ...\n"); | |
407 | if (copy_to_user(buf, "", 1)) { | |
3593cab5 | 408 | mutex_unlock(&dev->fileop_lock); |
e5589bef MCC |
409 | return -EFAULT; |
410 | } | |
411 | return (1); | |
412 | } | |
413 | ||
3593cab5 | 414 | if (mutex_lock_interruptible(&dev->fileop_lock)) |
a6c2ba28 | 415 | return -ERESTARTSYS; |
416 | ||
417 | if (dev->state & DEV_DISCONNECTED) { | |
eac94356 | 418 | em28xx_videodbg("device not present\n"); |
3593cab5 | 419 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 420 | return -ENODEV; |
421 | } | |
422 | ||
423 | if (dev->state & DEV_MISCONFIGURED) { | |
eac94356 | 424 | em28xx_videodbg("device misconfigured; close and open it again\n"); |
3593cab5 | 425 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 426 | return -EIO; |
427 | } | |
428 | ||
429 | if (dev->io == IO_MMAP) { | |
3acf2809 | 430 | em28xx_videodbg ("IO method is set to mmap; close and open" |
eac94356 | 431 | " the device again to choose the read method\n"); |
3593cab5 | 432 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 433 | return -EINVAL; |
434 | } | |
435 | ||
436 | if (dev->io == IO_NONE) { | |
3acf2809 MCC |
437 | if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) { |
438 | em28xx_errdev("read failed, not enough memory\n"); | |
3593cab5 | 439 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 440 | return -ENOMEM; |
441 | } | |
442 | dev->io = IO_READ; | |
443 | dev->stream = STREAM_ON; | |
3acf2809 | 444 | em28xx_queue_unusedframes(dev); |
a6c2ba28 | 445 | } |
446 | ||
447 | if (!count) { | |
3593cab5 | 448 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 449 | return 0; |
450 | } | |
451 | ||
452 | if (list_empty(&dev->outqueue)) { | |
453 | if (filp->f_flags & O_NONBLOCK) { | |
3593cab5 | 454 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 455 | return -EAGAIN; |
456 | } | |
457 | ret = wait_event_interruptible | |
458 | (dev->wait_frame, | |
459 | (!list_empty(&dev->outqueue)) || | |
460 | (dev->state & DEV_DISCONNECTED)); | |
461 | if (ret) { | |
3593cab5 | 462 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 463 | return ret; |
464 | } | |
465 | if (dev->state & DEV_DISCONNECTED) { | |
3593cab5 | 466 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 467 | return -ENODEV; |
468 | } | |
469 | } | |
470 | ||
3acf2809 | 471 | f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame); |
a6c2ba28 | 472 | |
473 | spin_lock_irqsave(&dev->queue_lock, lock_flags); | |
474 | list_for_each_entry(i, &dev->outqueue, frame) | |
475 | i->state = F_UNUSED; | |
476 | INIT_LIST_HEAD(&dev->outqueue); | |
477 | spin_unlock_irqrestore(&dev->queue_lock, lock_flags); | |
478 | ||
3acf2809 | 479 | em28xx_queue_unusedframes(dev); |
a6c2ba28 | 480 | |
481 | if (count > f->buf.length) | |
482 | count = f->buf.length; | |
483 | ||
484 | if (copy_to_user(buf, f->bufmem, count)) { | |
3593cab5 | 485 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 486 | return -EFAULT; |
487 | } | |
488 | *f_pos += count; | |
489 | ||
3593cab5 | 490 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 491 | |
492 | return count; | |
493 | } | |
494 | ||
495 | /* | |
3acf2809 | 496 | * em28xx_v4l2_poll() |
a6c2ba28 | 497 | * will allocate buffers when called for the first time |
498 | */ | |
3acf2809 | 499 | static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait) |
a6c2ba28 | 500 | { |
a6c2ba28 | 501 | unsigned int mask = 0; |
3acf2809 | 502 | struct em28xx *dev = filp->private_data; |
a6c2ba28 | 503 | |
3593cab5 | 504 | if (mutex_lock_interruptible(&dev->fileop_lock)) |
a6c2ba28 | 505 | return POLLERR; |
506 | ||
507 | if (dev->state & DEV_DISCONNECTED) { | |
eac94356 | 508 | em28xx_videodbg("device not present\n"); |
a6c2ba28 | 509 | } else if (dev->state & DEV_MISCONFIGURED) { |
eac94356 | 510 | em28xx_videodbg("device is misconfigured; close and open it again\n"); |
a6c2ba28 | 511 | } else { |
512 | if (dev->io == IO_NONE) { | |
3acf2809 MCC |
513 | if (!em28xx_request_buffers |
514 | (dev, EM28XX_NUM_READ_FRAMES)) { | |
515 | em28xx_warn | |
a6c2ba28 | 516 | ("poll() failed, not enough memory\n"); |
517 | } else { | |
518 | dev->io = IO_READ; | |
519 | dev->stream = STREAM_ON; | |
520 | } | |
521 | } | |
522 | ||
523 | if (dev->io == IO_READ) { | |
3acf2809 | 524 | em28xx_queue_unusedframes(dev); |
a6c2ba28 | 525 | poll_wait(filp, &dev->wait_frame, wait); |
526 | ||
527 | if (!list_empty(&dev->outqueue)) | |
528 | mask |= POLLIN | POLLRDNORM; | |
529 | ||
3593cab5 | 530 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 531 | |
532 | return mask; | |
533 | } | |
534 | } | |
535 | ||
3593cab5 | 536 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 537 | return POLLERR; |
538 | } | |
539 | ||
540 | /* | |
3acf2809 | 541 | * em28xx_vm_open() |
a6c2ba28 | 542 | */ |
3acf2809 | 543 | static void em28xx_vm_open(struct vm_area_struct *vma) |
a6c2ba28 | 544 | { |
3acf2809 | 545 | struct em28xx_frame_t *f = vma->vm_private_data; |
a6c2ba28 | 546 | f->vma_use_count++; |
547 | } | |
548 | ||
549 | /* | |
3acf2809 | 550 | * em28xx_vm_close() |
a6c2ba28 | 551 | */ |
3acf2809 | 552 | static void em28xx_vm_close(struct vm_area_struct *vma) |
a6c2ba28 | 553 | { |
554 | /* NOTE: buffers are not freed here */ | |
3acf2809 | 555 | struct em28xx_frame_t *f = vma->vm_private_data; |
63337dd3 MCC |
556 | |
557 | if (f->vma_use_count) | |
558 | f->vma_use_count--; | |
a6c2ba28 | 559 | } |
560 | ||
3acf2809 MCC |
561 | static struct vm_operations_struct em28xx_vm_ops = { |
562 | .open = em28xx_vm_open, | |
563 | .close = em28xx_vm_close, | |
a6c2ba28 | 564 | }; |
565 | ||
566 | /* | |
3acf2809 | 567 | * em28xx_v4l2_mmap() |
a6c2ba28 | 568 | */ |
3acf2809 | 569 | static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) |
a6c2ba28 | 570 | { |
a6c2ba28 | 571 | unsigned long size = vma->vm_end - vma->vm_start, |
3639c861 SS |
572 | start = vma->vm_start; |
573 | void *pos; | |
a6c2ba28 | 574 | u32 i; |
9c75541f | 575 | |
3acf2809 | 576 | struct em28xx *dev = filp->private_data; |
9c75541f | 577 | |
3593cab5 | 578 | if (mutex_lock_interruptible(&dev->fileop_lock)) |
a6c2ba28 | 579 | return -ERESTARTSYS; |
580 | ||
581 | if (dev->state & DEV_DISCONNECTED) { | |
eac94356 | 582 | em28xx_videodbg("mmap: device not present\n"); |
3593cab5 | 583 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 584 | return -ENODEV; |
585 | } | |
586 | ||
587 | if (dev->state & DEV_MISCONFIGURED) { | |
3acf2809 | 588 | em28xx_videodbg ("mmap: Device is misconfigured; close and " |
eac94356 | 589 | "open it again\n"); |
3593cab5 | 590 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 591 | return -EIO; |
592 | } | |
593 | ||
594 | if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) || | |
595 | size != PAGE_ALIGN(dev->frame[0].buf.length)) { | |
3593cab5 | 596 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 597 | return -EINVAL; |
598 | } | |
599 | ||
600 | for (i = 0; i < dev->num_frames; i++) { | |
601 | if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) | |
602 | break; | |
603 | } | |
604 | if (i == dev->num_frames) { | |
eac94356 | 605 | em28xx_videodbg("mmap: user supplied mapping address is out of range\n"); |
3593cab5 | 606 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 607 | return -EINVAL; |
608 | } | |
609 | ||
610 | /* VM_IO is eventually going to replace PageReserved altogether */ | |
611 | vma->vm_flags |= VM_IO; | |
612 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ | |
613 | ||
3639c861 | 614 | pos = dev->frame[i].bufmem; |
a6c2ba28 | 615 | while (size > 0) { /* size is page-aligned */ |
3639c861 SS |
616 | if (vm_insert_page(vma, start, vmalloc_to_page(pos))) { |
617 | em28xx_videodbg("mmap: vm_insert_page failed\n"); | |
3593cab5 | 618 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 619 | return -EAGAIN; |
620 | } | |
621 | start += PAGE_SIZE; | |
622 | pos += PAGE_SIZE; | |
623 | size -= PAGE_SIZE; | |
624 | } | |
625 | ||
3acf2809 | 626 | vma->vm_ops = &em28xx_vm_ops; |
a6c2ba28 | 627 | vma->vm_private_data = &dev->frame[i]; |
628 | ||
3acf2809 | 629 | em28xx_vm_open(vma); |
3593cab5 | 630 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 631 | return 0; |
632 | } | |
633 | ||
634 | /* | |
3acf2809 | 635 | * em28xx_get_ctrl() |
a6c2ba28 | 636 | * return the current saturation, brightness or contrast, mute state |
637 | */ | |
3acf2809 | 638 | static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) |
a6c2ba28 | 639 | { |
a6c2ba28 | 640 | switch (ctrl->id) { |
641 | case V4L2_CID_AUDIO_MUTE: | |
642 | ctrl->value = dev->mute; | |
643 | return 0; | |
644 | case V4L2_CID_AUDIO_VOLUME: | |
645 | ctrl->value = dev->volume; | |
646 | return 0; | |
c0477ad9 MCC |
647 | default: |
648 | return -EINVAL; | |
649 | } | |
650 | } | |
651 | ||
a6c2ba28 | 652 | /* |
3acf2809 | 653 | * em28xx_set_ctrl() |
a6c2ba28 | 654 | * mute or set new saturation, brightness or contrast |
655 | */ | |
3acf2809 | 656 | static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) |
a6c2ba28 | 657 | { |
658 | switch (ctrl->id) { | |
659 | case V4L2_CID_AUDIO_MUTE: | |
660 | if (ctrl->value != dev->mute) { | |
661 | dev->mute = ctrl->value; | |
3acf2809 MCC |
662 | em28xx_audio_usb_mute(dev, ctrl->value); |
663 | return em28xx_audio_analog_set(dev); | |
a6c2ba28 | 664 | } |
665 | return 0; | |
666 | case V4L2_CID_AUDIO_VOLUME: | |
667 | dev->volume = ctrl->value; | |
3acf2809 | 668 | return em28xx_audio_analog_set(dev); |
c0477ad9 MCC |
669 | default: |
670 | return -EINVAL; | |
671 | } | |
672 | } | |
673 | ||
a6c2ba28 | 674 | /* |
3acf2809 | 675 | * em28xx_stream_interrupt() |
a6c2ba28 | 676 | * stops streaming |
677 | */ | |
3acf2809 | 678 | static int em28xx_stream_interrupt(struct em28xx *dev) |
a6c2ba28 | 679 | { |
680 | int ret = 0; | |
681 | ||
682 | /* stop reading from the device */ | |
683 | ||
684 | dev->stream = STREAM_INTERRUPT; | |
685 | ret = wait_event_timeout(dev->wait_stream, | |
686 | (dev->stream == STREAM_OFF) || | |
687 | (dev->state & DEV_DISCONNECTED), | |
3acf2809 | 688 | EM28XX_URB_TIMEOUT); |
a6c2ba28 | 689 | if (dev->state & DEV_DISCONNECTED) |
690 | return -ENODEV; | |
691 | else if (ret) { | |
692 | dev->state |= DEV_MISCONFIGURED; | |
3acf2809 | 693 | em28xx_videodbg("device is misconfigured; close and " |
e5589bef MCC |
694 | "open /dev/video%d again\n", |
695 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); | |
a6c2ba28 | 696 | return ret; |
697 | } | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
3acf2809 | 702 | static int em28xx_set_norm(struct em28xx *dev, int width, int height) |
a6c2ba28 | 703 | { |
704 | unsigned int hscale, vscale; | |
705 | unsigned int maxh, maxw; | |
706 | ||
707 | maxw = norm_maxw(dev); | |
708 | maxh = norm_maxh(dev); | |
709 | ||
710 | /* width must even because of the YUYV format */ | |
711 | /* height must be even because of interlacing */ | |
712 | height &= 0xfffe; | |
713 | width &= 0xfffe; | |
714 | ||
715 | if (height < 32) | |
716 | height = 32; | |
717 | if (height > maxh) | |
718 | height = maxh; | |
719 | if (width < 48) | |
720 | width = 48; | |
721 | if (width > maxw) | |
722 | width = maxw; | |
723 | ||
724 | if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000) | |
725 | hscale = 0x3fff; | |
726 | width = (((unsigned long)maxw) << 12) / (hscale + 4096L); | |
727 | ||
728 | if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000) | |
729 | vscale = 0x3fff; | |
730 | height = (((unsigned long)maxh) << 12) / (vscale + 4096L); | |
731 | ||
732 | /* set new image size */ | |
733 | dev->width = width; | |
734 | dev->height = height; | |
735 | dev->frame_size = dev->width * dev->height * 2; | |
736 | dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ | |
737 | dev->bytesperline = dev->width * 2; | |
738 | dev->hscale = hscale; | |
739 | dev->vscale = vscale; | |
740 | ||
3acf2809 | 741 | em28xx_resolution_set(dev); |
a6c2ba28 | 742 | |
743 | return 0; | |
744 | } | |
745 | ||
e5589bef MCC |
746 | static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format) |
747 | { | |
748 | em28xx_videodbg("VIDIOC_G_FMT: type=%s\n", | |
749 | (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ? | |
750 | "V4L2_BUF_TYPE_VIDEO_CAPTURE" : | |
751 | (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ? | |
752 | "V4L2_BUF_TYPE_VBI_CAPTURE" : | |
753 | (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ? | |
754 | "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " : | |
755 | "not supported"); | |
756 | ||
2d50f847 MCC |
757 | switch (format->type) { |
758 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
759 | { | |
e5589bef MCC |
760 | format->fmt.pix.width = dev->width; |
761 | format->fmt.pix.height = dev->height; | |
762 | format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; | |
763 | format->fmt.pix.bytesperline = dev->bytesperline; | |
764 | format->fmt.pix.sizeimage = dev->frame_size; | |
765 | format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; | |
766 | format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ | |
767 | ||
768 | em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width, | |
769 | dev->height); | |
2d50f847 | 770 | break; |
e5589bef MCC |
771 | } |
772 | ||
2d50f847 MCC |
773 | case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: |
774 | { | |
775 | format->fmt.sliced.service_set=0; | |
776 | ||
777 | em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format); | |
778 | ||
779 | if (format->fmt.sliced.service_set==0) | |
780 | return -EINVAL; | |
781 | ||
782 | break; | |
783 | } | |
784 | ||
785 | default: | |
786 | return -EINVAL; | |
787 | } | |
788 | return (0); | |
e5589bef MCC |
789 | } |
790 | ||
2d50f847 MCC |
791 | static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format) |
792 | { | |
793 | u32 i; | |
794 | int ret = 0; | |
795 | int width = format->fmt.pix.width; | |
796 | int height = format->fmt.pix.height; | |
797 | unsigned int hscale, vscale; | |
798 | unsigned int maxh, maxw; | |
799 | ||
800 | maxw = norm_maxw(dev); | |
801 | maxh = norm_maxh(dev); | |
802 | ||
803 | em28xx_videodbg("%s: type=%s\n", | |
804 | cmd == VIDIOC_TRY_FMT ? | |
805 | "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT", | |
806 | format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ? | |
807 | "V4L2_BUF_TYPE_VIDEO_CAPTURE" : | |
808 | format->type == V4L2_BUF_TYPE_VBI_CAPTURE ? | |
809 | "V4L2_BUF_TYPE_VBI_CAPTURE " : | |
810 | "not supported"); | |
811 | ||
812 | if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) { | |
813 | em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format); | |
814 | ||
815 | if (format->fmt.sliced.service_set==0) | |
816 | return -EINVAL; | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
821 | ||
822 | if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
823 | return -EINVAL; | |
824 | ||
825 | em28xx_videodbg("%s: requested %dx%d\n", | |
826 | cmd == VIDIOC_TRY_FMT ? | |
827 | "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT", | |
828 | format->fmt.pix.width, format->fmt.pix.height); | |
829 | ||
830 | /* FIXME: Move some code away from here */ | |
831 | /* width must even because of the YUYV format */ | |
832 | /* height must be even because of interlacing */ | |
833 | height &= 0xfffe; | |
834 | width &= 0xfffe; | |
835 | ||
836 | if (height < 32) | |
837 | height = 32; | |
838 | if (height > maxh) | |
839 | height = maxh; | |
840 | if (width < 48) | |
841 | width = 48; | |
842 | if (width > maxw) | |
843 | width = maxw; | |
844 | ||
845 | if(dev->is_em2800){ | |
846 | /* the em2800 can only scale down to 50% */ | |
847 | if(height % (maxh / 2)) | |
848 | height=maxh; | |
849 | if(width % (maxw / 2)) | |
850 | width=maxw; | |
851 | /* according to empiatech support */ | |
852 | /* the MaxPacketSize is to small to support */ | |
853 | /* framesizes larger than 640x480 @ 30 fps */ | |
854 | /* or 640x576 @ 25 fps. As this would cut */ | |
855 | /* of a part of the image we prefer */ | |
856 | /* 360x576 or 360x480 for now */ | |
857 | if(width == maxw && height == maxh) | |
858 | width /= 2; | |
859 | } | |
860 | ||
9aeb4b05 | 861 | if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000) |
2d50f847 | 862 | hscale = 0x3fff; |
2d50f847 | 863 | |
9aeb4b05 MCC |
864 | width = (((unsigned long)maxw) << 12) / (hscale + 4096L); |
865 | ||
866 | if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000) | |
2d50f847 | 867 | vscale = 0x3fff; |
9aeb4b05 MCC |
868 | |
869 | height = (((unsigned long)maxh) << 12) / (vscale + 4096L); | |
2d50f847 MCC |
870 | |
871 | format->fmt.pix.width = width; | |
872 | format->fmt.pix.height = height; | |
873 | format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; | |
874 | format->fmt.pix.bytesperline = width * 2; | |
875 | format->fmt.pix.sizeimage = width * 2 * height; | |
876 | format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; | |
877 | format->fmt.pix.field = V4L2_FIELD_INTERLACED; | |
878 | ||
879 | em28xx_videodbg("%s: returned %dx%d (%d, %d)\n", | |
9aeb4b05 MCC |
880 | cmd == VIDIOC_TRY_FMT ? |
881 | "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT", | |
882 | format->fmt.pix.width, format->fmt.pix.height, hscale, vscale); | |
2d50f847 MCC |
883 | |
884 | if (cmd == VIDIOC_TRY_FMT) | |
885 | return 0; | |
886 | ||
887 | for (i = 0; i < dev->num_frames; i++) | |
888 | if (dev->frame[i].vma_use_count) { | |
889 | em28xx_videodbg("VIDIOC_S_FMT failed. " | |
890 | "Unmap the buffers first.\n"); | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | /* stop io in case it is already in progress */ | |
895 | if (dev->stream == STREAM_ON) { | |
3a4fa0a2 | 896 | em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n"); |
2d50f847 MCC |
897 | if ((ret = em28xx_stream_interrupt(dev))) |
898 | return ret; | |
899 | } | |
900 | ||
901 | em28xx_release_buffers(dev); | |
902 | dev->io = IO_NONE; | |
903 | ||
904 | /* set new image size */ | |
905 | dev->width = width; | |
906 | dev->height = height; | |
907 | dev->frame_size = dev->width * dev->height * 2; | |
9aeb4b05 | 908 | dev->field_size = dev->frame_size >> 1; |
2d50f847 MCC |
909 | dev->bytesperline = dev->width * 2; |
910 | dev->hscale = hscale; | |
911 | dev->vscale = vscale; | |
912 | em28xx_uninit_isoc(dev); | |
913 | em28xx_set_alternate(dev); | |
914 | em28xx_capture_start(dev, 1); | |
915 | em28xx_resolution_set(dev); | |
916 | em28xx_init_isoc(dev); | |
917 | ||
918 | return 0; | |
919 | } | |
e5589bef | 920 | |
a6c2ba28 | 921 | /* |
3acf2809 | 922 | * em28xx_v4l2_do_ioctl() |
a6c2ba28 | 923 | * This function is _not_ called directly, but from |
3acf2809 | 924 | * em28xx_v4l2_ioctl. Userspace |
a6c2ba28 | 925 | * copying is done already, arg is a kernel pointer. |
926 | */ | |
3acf2809 MCC |
927 | static int em28xx_do_ioctl(struct inode *inode, struct file *filp, |
928 | struct em28xx *dev, unsigned int cmd, void *arg, | |
a6c2ba28 | 929 | v4l2_kioctl driver_ioctl) |
930 | { | |
931 | int ret; | |
932 | ||
933 | switch (cmd) { | |
934 | /* ---------- tv norms ---------- */ | |
935 | case VIDIOC_ENUMSTD: | |
9aeb4b05 MCC |
936 | { |
937 | struct v4l2_standard *e = arg; | |
938 | unsigned int i; | |
a6c2ba28 | 939 | |
9aeb4b05 MCC |
940 | i = e->index; |
941 | if (i >= TVNORMS) | |
942 | return -EINVAL; | |
943 | ret = v4l2_video_std_construct(e, tvnorms[e->index].id, | |
944 | tvnorms[e->index].name); | |
945 | e->index = i; | |
946 | if (ret < 0) | |
947 | return ret; | |
948 | return 0; | |
949 | } | |
a6c2ba28 | 950 | case VIDIOC_G_STD: |
9aeb4b05 MCC |
951 | { |
952 | v4l2_std_id *id = arg; | |
a6c2ba28 | 953 | |
9aeb4b05 MCC |
954 | *id = dev->tvnorm->id; |
955 | return 0; | |
956 | } | |
a6c2ba28 | 957 | case VIDIOC_S_STD: |
9aeb4b05 MCC |
958 | { |
959 | v4l2_std_id *id = arg; | |
960 | unsigned int i; | |
a6c2ba28 | 961 | |
9aeb4b05 MCC |
962 | for (i = 0; i < TVNORMS; i++) |
963 | if (*id == tvnorms[i].id) | |
964 | break; | |
965 | if (i == TVNORMS) | |
a6c2ba28 | 966 | for (i = 0; i < TVNORMS; i++) |
9aeb4b05 | 967 | if (*id & tvnorms[i].id) |
a6c2ba28 | 968 | break; |
9aeb4b05 MCC |
969 | if (i == TVNORMS) |
970 | return -EINVAL; | |
a6c2ba28 | 971 | |
3593cab5 | 972 | mutex_lock(&dev->lock); |
9aeb4b05 | 973 | dev->tvnorm = &tvnorms[i]; |
a6c2ba28 | 974 | |
9aeb4b05 | 975 | em28xx_set_norm(dev, dev->width, dev->height); |
a6c2ba28 | 976 | |
9aeb4b05 MCC |
977 | em28xx_i2c_call_clients(dev, VIDIOC_S_STD, |
978 | &dev->tvnorm->id); | |
a6c2ba28 | 979 | |
3593cab5 | 980 | mutex_unlock(&dev->lock); |
a6c2ba28 | 981 | |
9aeb4b05 MCC |
982 | return 0; |
983 | } | |
a6c2ba28 | 984 | |
9aeb4b05 | 985 | /* ------ input switching ---------- */ |
a6c2ba28 | 986 | case VIDIOC_ENUMINPUT: |
9aeb4b05 MCC |
987 | { |
988 | struct v4l2_input *i = arg; | |
989 | unsigned int n; | |
990 | static const char *iname[] = { | |
991 | [EM28XX_VMUX_COMPOSITE1] = "Composite1", | |
992 | [EM28XX_VMUX_COMPOSITE2] = "Composite2", | |
993 | [EM28XX_VMUX_COMPOSITE3] = "Composite3", | |
994 | [EM28XX_VMUX_COMPOSITE4] = "Composite4", | |
995 | [EM28XX_VMUX_SVIDEO] = "S-Video", | |
996 | [EM28XX_VMUX_TELEVISION] = "Television", | |
997 | [EM28XX_VMUX_CABLE] = "Cable TV", | |
998 | [EM28XX_VMUX_DVB] = "DVB", | |
999 | [EM28XX_VMUX_DEBUG] = "for debug only", | |
1000 | }; | |
1001 | ||
1002 | n = i->index; | |
1003 | if (n >= MAX_EM28XX_INPUT) | |
1004 | return -EINVAL; | |
1005 | if (0 == INPUT(n)->type) | |
1006 | return -EINVAL; | |
1007 | memset(i, 0, sizeof(*i)); | |
1008 | i->index = n; | |
1009 | i->type = V4L2_INPUT_TYPE_CAMERA; | |
1010 | strcpy(i->name, iname[INPUT(n)->type]); | |
1011 | if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || | |
1012 | (EM28XX_VMUX_CABLE == INPUT(n)->type)) | |
1013 | i->type = V4L2_INPUT_TYPE_TUNER; | |
1014 | for (n = 0; n < ARRAY_SIZE(tvnorms); n++) | |
1015 | i->std |= tvnorms[n].id; | |
1016 | return 0; | |
1017 | } | |
a6c2ba28 | 1018 | case VIDIOC_G_INPUT: |
9aeb4b05 MCC |
1019 | { |
1020 | int *i = arg; | |
1021 | *i = dev->ctl_input; | |
a6c2ba28 | 1022 | |
9aeb4b05 MCC |
1023 | return 0; |
1024 | } | |
a6c2ba28 | 1025 | case VIDIOC_S_INPUT: |
9aeb4b05 MCC |
1026 | { |
1027 | int *index = arg; | |
a6c2ba28 | 1028 | |
9aeb4b05 MCC |
1029 | if (*index >= MAX_EM28XX_INPUT) |
1030 | return -EINVAL; | |
1031 | if (0 == INPUT(*index)->type) | |
1032 | return -EINVAL; | |
a6c2ba28 | 1033 | |
3593cab5 | 1034 | mutex_lock(&dev->lock); |
9aeb4b05 | 1035 | video_mux(dev, *index); |
3593cab5 | 1036 | mutex_unlock(&dev->lock); |
a6c2ba28 | 1037 | |
9aeb4b05 MCC |
1038 | return 0; |
1039 | } | |
a6c2ba28 | 1040 | case VIDIOC_G_AUDIO: |
9aeb4b05 MCC |
1041 | { |
1042 | struct v4l2_audio *a = arg; | |
1043 | unsigned int index = a->index; | |
a6c2ba28 | 1044 | |
9aeb4b05 MCC |
1045 | if (a->index > 1) |
1046 | return -EINVAL; | |
1047 | memset(a, 0, sizeof(*a)); | |
1048 | index = dev->ctl_ainput; | |
a6c2ba28 | 1049 | |
9aeb4b05 MCC |
1050 | if (index == 0) { |
1051 | strcpy(a->name, "Television"); | |
1052 | } else { | |
1053 | strcpy(a->name, "Line In"); | |
a6c2ba28 | 1054 | } |
9aeb4b05 MCC |
1055 | a->capability = V4L2_AUDCAP_STEREO; |
1056 | a->index = index; | |
1057 | return 0; | |
1058 | } | |
a6c2ba28 | 1059 | case VIDIOC_S_AUDIO: |
9aeb4b05 MCC |
1060 | { |
1061 | struct v4l2_audio *a = arg; | |
a6c2ba28 | 1062 | |
9aeb4b05 MCC |
1063 | if (a->index != dev->ctl_ainput) |
1064 | return -EINVAL; | |
1065 | ||
1066 | return 0; | |
1067 | } | |
a6c2ba28 | 1068 | |
9aeb4b05 | 1069 | /* --- controls ---------------------------------------------- */ |
a6c2ba28 | 1070 | case VIDIOC_QUERYCTRL: |
9aeb4b05 MCC |
1071 | { |
1072 | struct v4l2_queryctrl *qc = arg; | |
1073 | int i, id=qc->id; | |
1074 | ||
1075 | memset(qc,0,sizeof(*qc)); | |
1076 | qc->id=id; | |
1077 | ||
1078 | if (!dev->has_msp34xx) { | |
1079 | for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { | |
1080 | if (qc->id && qc->id == em28xx_qctrl[i].id) { | |
1081 | memcpy(qc, &(em28xx_qctrl[i]), | |
1082 | sizeof(*qc)); | |
a6c2ba28 | 1083 | return 0; |
1084 | } | |
c0477ad9 | 1085 | } |
9aeb4b05 | 1086 | } |
f5762e44 MCC |
1087 | em28xx_i2c_call_clients(dev,cmd,qc); |
1088 | if (qc->type) | |
1089 | return 0; | |
1090 | else | |
1091 | return -EINVAL; | |
9aeb4b05 | 1092 | } |
a6c2ba28 | 1093 | case VIDIOC_G_CTRL: |
9aeb4b05 MCC |
1094 | { |
1095 | struct v4l2_control *ctrl = arg; | |
1096 | int retval=-EINVAL; | |
a6c2ba28 | 1097 | |
9aeb4b05 MCC |
1098 | if (!dev->has_msp34xx) |
1099 | retval=em28xx_get_ctrl(dev, ctrl); | |
1100 | if (retval==-EINVAL) { | |
f5762e44 MCC |
1101 | em28xx_i2c_call_clients(dev,cmd,arg); |
1102 | return 0; | |
9aeb4b05 MCC |
1103 | } else return retval; |
1104 | } | |
a6c2ba28 | 1105 | case VIDIOC_S_CTRL: |
9aeb4b05 MCC |
1106 | { |
1107 | struct v4l2_control *ctrl = arg; | |
1108 | u8 i; | |
1109 | ||
1110 | if (!dev->has_msp34xx){ | |
1111 | for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { | |
1112 | if (ctrl->id == em28xx_qctrl[i].id) { | |
1113 | if (ctrl->value < | |
1114 | em28xx_qctrl[i].minimum | |
1115 | || ctrl->value > | |
1116 | em28xx_qctrl[i].maximum) | |
1117 | return -ERANGE; | |
1118 | return em28xx_set_ctrl(dev, ctrl); | |
c0477ad9 MCC |
1119 | } |
1120 | } | |
9aeb4b05 | 1121 | } |
a6c2ba28 | 1122 | |
f5762e44 MCC |
1123 | em28xx_i2c_call_clients(dev,cmd,arg); |
1124 | return 0; | |
9aeb4b05 MCC |
1125 | } |
1126 | /* --- tuner ioctls ------------------------------------------ */ | |
a6c2ba28 | 1127 | case VIDIOC_G_TUNER: |
9aeb4b05 MCC |
1128 | { |
1129 | struct v4l2_tuner *t = arg; | |
a6c2ba28 | 1130 | |
9aeb4b05 MCC |
1131 | if (0 != t->index) |
1132 | return -EINVAL; | |
a6c2ba28 | 1133 | |
9aeb4b05 MCC |
1134 | memset(t, 0, sizeof(*t)); |
1135 | strcpy(t->name, "Tuner"); | |
3593cab5 | 1136 | mutex_lock(&dev->lock); |
ab4cecf9 HV |
1137 | /* let clients fill in the remainder of this struct */ |
1138 | em28xx_i2c_call_clients(dev, cmd, t); | |
3593cab5 | 1139 | mutex_unlock(&dev->lock); |
9aeb4b05 MCC |
1140 | em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal, |
1141 | t->afc); | |
1142 | return 0; | |
1143 | } | |
a6c2ba28 | 1144 | case VIDIOC_S_TUNER: |
9aeb4b05 MCC |
1145 | { |
1146 | struct v4l2_tuner *t = arg; | |
a6c2ba28 | 1147 | |
9aeb4b05 MCC |
1148 | if (0 != t->index) |
1149 | return -EINVAL; | |
3593cab5 | 1150 | mutex_lock(&dev->lock); |
ab4cecf9 HV |
1151 | /* let clients handle this */ |
1152 | em28xx_i2c_call_clients(dev, cmd, t); | |
3593cab5 | 1153 | mutex_unlock(&dev->lock); |
9aeb4b05 MCC |
1154 | return 0; |
1155 | } | |
a6c2ba28 | 1156 | case VIDIOC_G_FREQUENCY: |
9aeb4b05 MCC |
1157 | { |
1158 | struct v4l2_frequency *f = arg; | |
a6c2ba28 | 1159 | |
9aeb4b05 MCC |
1160 | memset(f, 0, sizeof(*f)); |
1161 | f->type = V4L2_TUNER_ANALOG_TV; | |
1162 | f->frequency = dev->ctl_freq; | |
a6c2ba28 | 1163 | |
9aeb4b05 MCC |
1164 | return 0; |
1165 | } | |
a6c2ba28 | 1166 | case VIDIOC_S_FREQUENCY: |
9aeb4b05 MCC |
1167 | { |
1168 | struct v4l2_frequency *f = arg; | |
a6c2ba28 | 1169 | |
9aeb4b05 MCC |
1170 | if (0 != f->tuner) |
1171 | return -EINVAL; | |
a6c2ba28 | 1172 | |
9aeb4b05 MCC |
1173 | if (V4L2_TUNER_ANALOG_TV != f->type) |
1174 | return -EINVAL; | |
a6c2ba28 | 1175 | |
3593cab5 | 1176 | mutex_lock(&dev->lock); |
9aeb4b05 MCC |
1177 | dev->ctl_freq = f->frequency; |
1178 | em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f); | |
3593cab5 | 1179 | mutex_unlock(&dev->lock); |
9aeb4b05 MCC |
1180 | return 0; |
1181 | } | |
a6c2ba28 | 1182 | case VIDIOC_CROPCAP: |
9aeb4b05 MCC |
1183 | { |
1184 | struct v4l2_cropcap *cc = arg; | |
a6c2ba28 | 1185 | |
9aeb4b05 MCC |
1186 | if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1187 | return -EINVAL; | |
1188 | cc->bounds.left = 0; | |
1189 | cc->bounds.top = 0; | |
1190 | cc->bounds.width = dev->width; | |
1191 | cc->bounds.height = dev->height; | |
1192 | cc->defrect = cc->bounds; | |
1193 | cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ | |
1194 | cc->pixelaspect.denominator = 59; | |
1195 | return 0; | |
1196 | } | |
a6c2ba28 | 1197 | case VIDIOC_STREAMON: |
9aeb4b05 MCC |
1198 | { |
1199 | int *type = arg; | |
a6c2ba28 | 1200 | |
9aeb4b05 MCC |
1201 | if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1202 | || dev->io != IO_MMAP) | |
1203 | return -EINVAL; | |
a6c2ba28 | 1204 | |
9aeb4b05 MCC |
1205 | if (list_empty(&dev->inqueue)) |
1206 | return -EINVAL; | |
a6c2ba28 | 1207 | |
9aeb4b05 | 1208 | dev->stream = STREAM_ON; /* FIXME: Start video capture here? */ |
a6c2ba28 | 1209 | |
9aeb4b05 | 1210 | em28xx_videodbg("VIDIOC_STREAMON: starting stream\n"); |
a6c2ba28 | 1211 | |
9aeb4b05 MCC |
1212 | return 0; |
1213 | } | |
a6c2ba28 | 1214 | case VIDIOC_STREAMOFF: |
9aeb4b05 MCC |
1215 | { |
1216 | int *type = arg; | |
1217 | int ret; | |
a6c2ba28 | 1218 | |
9aeb4b05 MCC |
1219 | if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1220 | || dev->io != IO_MMAP) | |
1221 | return -EINVAL; | |
a6c2ba28 | 1222 | |
9aeb4b05 MCC |
1223 | if (dev->stream == STREAM_ON) { |
1224 | em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n"); | |
1225 | if ((ret = em28xx_stream_interrupt(dev))) | |
1226 | return ret; | |
a6c2ba28 | 1227 | } |
9aeb4b05 MCC |
1228 | em28xx_empty_framequeues(dev); |
1229 | ||
1230 | return 0; | |
1231 | } | |
a6c2ba28 | 1232 | default: |
1233 | return v4l_compat_translate_ioctl(inode, filp, cmd, arg, | |
1234 | driver_ioctl); | |
1235 | } | |
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | /* | |
3acf2809 | 1240 | * em28xx_v4l2_do_ioctl() |
a6c2ba28 | 1241 | * This function is _not_ called directly, but from |
3acf2809 | 1242 | * em28xx_v4l2_ioctl. Userspace |
a6c2ba28 | 1243 | * copying is done already, arg is a kernel pointer. |
1244 | */ | |
3acf2809 | 1245 | static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp, |
a6c2ba28 | 1246 | unsigned int cmd, void *arg) |
1247 | { | |
3acf2809 | 1248 | struct em28xx *dev = filp->private_data; |
a6c2ba28 | 1249 | |
1250 | if (!dev) | |
1251 | return -ENODEV; | |
1252 | ||
1253 | if (video_debug > 1) | |
5e453dc7 | 1254 | v4l_print_ioctl(dev->name,cmd); |
a6c2ba28 | 1255 | |
1256 | switch (cmd) { | |
1257 | ||
1258 | /* --- capabilities ------------------------------------------ */ | |
1259 | case VIDIOC_QUERYCAP: | |
1260 | { | |
9aeb4b05 MCC |
1261 | struct v4l2_capability *cap = arg; |
1262 | ||
1263 | memset(cap, 0, sizeof(*cap)); | |
1264 | strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); | |
1265 | strlcpy(cap->card, em28xx_boards[dev->model].name, | |
1266 | sizeof(cap->card)); | |
1267 | strlcpy(cap->bus_info, dev->udev->dev.bus_id, | |
1268 | sizeof(cap->bus_info)); | |
1269 | cap->version = EM28XX_VERSION_CODE; | |
1270 | cap->capabilities = | |
1271 | V4L2_CAP_SLICED_VBI_CAPTURE | | |
1272 | V4L2_CAP_VIDEO_CAPTURE | | |
1273 | V4L2_CAP_AUDIO | | |
1274 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; | |
1275 | if (dev->has_tuner) | |
1276 | cap->capabilities |= V4L2_CAP_TUNER; | |
1277 | return 0; | |
1278 | } | |
1279 | /* --- capture ioctls ---------------------------------------- */ | |
a6c2ba28 | 1280 | case VIDIOC_ENUM_FMT: |
9aeb4b05 MCC |
1281 | { |
1282 | struct v4l2_fmtdesc *fmtd = arg; | |
a6c2ba28 | 1283 | |
9aeb4b05 MCC |
1284 | if (fmtd->index != 0) |
1285 | return -EINVAL; | |
1286 | memset(fmtd, 0, sizeof(*fmtd)); | |
1287 | fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1288 | strcpy(fmtd->description, "Packed YUY2"); | |
1289 | fmtd->pixelformat = V4L2_PIX_FMT_YUYV; | |
1290 | memset(fmtd->reserved, 0, sizeof(fmtd->reserved)); | |
1291 | return 0; | |
1292 | } | |
a6c2ba28 | 1293 | case VIDIOC_G_FMT: |
e5589bef | 1294 | return em28xx_get_fmt(dev, (struct v4l2_format *) arg); |
a6c2ba28 | 1295 | |
1296 | case VIDIOC_TRY_FMT: | |
1297 | case VIDIOC_S_FMT: | |
2d50f847 | 1298 | return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg); |
a6c2ba28 | 1299 | |
a6c2ba28 | 1300 | case VIDIOC_REQBUFS: |
9aeb4b05 MCC |
1301 | { |
1302 | struct v4l2_requestbuffers *rb = arg; | |
1303 | u32 i; | |
1304 | int ret; | |
a6c2ba28 | 1305 | |
9aeb4b05 MCC |
1306 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
1307 | rb->memory != V4L2_MEMORY_MMAP) | |
1308 | return -EINVAL; | |
a6c2ba28 | 1309 | |
9aeb4b05 MCC |
1310 | if (dev->io == IO_READ) { |
1311 | em28xx_videodbg ("method is set to read;" | |
1312 | " close and open the device again to" | |
1313 | " choose the mmap I/O method\n"); | |
1314 | return -EINVAL; | |
1315 | } | |
a6c2ba28 | 1316 | |
9aeb4b05 MCC |
1317 | for (i = 0; i < dev->num_frames; i++) |
1318 | if (dev->frame[i].vma_use_count) { | |
1319 | em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n"); | |
1320 | return -EINVAL; | |
a6c2ba28 | 1321 | } |
1322 | ||
9aeb4b05 MCC |
1323 | if (dev->stream == STREAM_ON) { |
1324 | em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n"); | |
1325 | if ((ret = em28xx_stream_interrupt(dev))) | |
1326 | return ret; | |
1327 | } | |
a6c2ba28 | 1328 | |
9aeb4b05 | 1329 | em28xx_empty_framequeues(dev); |
a6c2ba28 | 1330 | |
9aeb4b05 MCC |
1331 | em28xx_release_buffers(dev); |
1332 | if (rb->count) | |
1333 | rb->count = | |
1334 | em28xx_request_buffers(dev, rb->count); | |
a6c2ba28 | 1335 | |
9aeb4b05 | 1336 | dev->frame_current = NULL; |
a6c2ba28 | 1337 | |
9aeb4b05 MCC |
1338 | em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n", |
1339 | rb->count); | |
1340 | dev->io = rb->count ? IO_MMAP : IO_NONE; | |
1341 | return 0; | |
1342 | } | |
a6c2ba28 | 1343 | case VIDIOC_QUERYBUF: |
9aeb4b05 MCC |
1344 | { |
1345 | struct v4l2_buffer *b = arg; | |
a6c2ba28 | 1346 | |
9aeb4b05 MCC |
1347 | if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
1348 | b->index >= dev->num_frames || dev->io != IO_MMAP) | |
1349 | return -EINVAL; | |
a6c2ba28 | 1350 | |
9aeb4b05 | 1351 | memcpy(b, &dev->frame[b->index].buf, sizeof(*b)); |
a6c2ba28 | 1352 | |
9aeb4b05 MCC |
1353 | if (dev->frame[b->index].vma_use_count) { |
1354 | b->flags |= V4L2_BUF_FLAG_MAPPED; | |
a6c2ba28 | 1355 | } |
9aeb4b05 MCC |
1356 | if (dev->frame[b->index].state == F_DONE) |
1357 | b->flags |= V4L2_BUF_FLAG_DONE; | |
1358 | else if (dev->frame[b->index].state != F_UNUSED) | |
1359 | b->flags |= V4L2_BUF_FLAG_QUEUED; | |
1360 | return 0; | |
1361 | } | |
a6c2ba28 | 1362 | case VIDIOC_QBUF: |
9aeb4b05 MCC |
1363 | { |
1364 | struct v4l2_buffer *b = arg; | |
1365 | unsigned long lock_flags; | |
a6c2ba28 | 1366 | |
9aeb4b05 MCC |
1367 | if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
1368 | b->index >= dev->num_frames || dev->io != IO_MMAP) { | |
1369 | return -EINVAL; | |
1370 | } | |
a6c2ba28 | 1371 | |
9aeb4b05 MCC |
1372 | if (dev->frame[b->index].state != F_UNUSED) { |
1373 | return -EAGAIN; | |
1374 | } | |
1375 | dev->frame[b->index].state = F_QUEUED; | |
a6c2ba28 | 1376 | |
9aeb4b05 MCC |
1377 | /* add frame to fifo */ |
1378 | spin_lock_irqsave(&dev->queue_lock, lock_flags); | |
1379 | list_add_tail(&dev->frame[b->index].frame, | |
1380 | &dev->inqueue); | |
1381 | spin_unlock_irqrestore(&dev->queue_lock, lock_flags); | |
a6c2ba28 | 1382 | |
9aeb4b05 MCC |
1383 | return 0; |
1384 | } | |
a6c2ba28 | 1385 | case VIDIOC_DQBUF: |
9aeb4b05 MCC |
1386 | { |
1387 | struct v4l2_buffer *b = arg; | |
1388 | struct em28xx_frame_t *f; | |
1389 | unsigned long lock_flags; | |
1390 | int ret = 0; | |
a6c2ba28 | 1391 | |
9aeb4b05 MCC |
1392 | if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1393 | || dev->io != IO_MMAP) | |
1394 | return -EINVAL; | |
a6c2ba28 | 1395 | |
9aeb4b05 MCC |
1396 | if (list_empty(&dev->outqueue)) { |
1397 | if (dev->stream == STREAM_OFF) | |
1398 | return -EINVAL; | |
1399 | if (filp->f_flags & O_NONBLOCK) | |
1400 | return -EAGAIN; | |
1401 | ret = wait_event_interruptible | |
1402 | (dev->wait_frame, | |
1403 | (!list_empty(&dev->outqueue)) || | |
1404 | (dev->state & DEV_DISCONNECTED)); | |
1405 | if (ret) | |
1406 | return ret; | |
1407 | if (dev->state & DEV_DISCONNECTED) | |
1408 | return -ENODEV; | |
1409 | } | |
a6c2ba28 | 1410 | |
9aeb4b05 MCC |
1411 | spin_lock_irqsave(&dev->queue_lock, lock_flags); |
1412 | f = list_entry(dev->outqueue.next, | |
1413 | struct em28xx_frame_t, frame); | |
1414 | list_del(dev->outqueue.next); | |
1415 | spin_unlock_irqrestore(&dev->queue_lock, lock_flags); | |
a6c2ba28 | 1416 | |
9aeb4b05 MCC |
1417 | f->state = F_UNUSED; |
1418 | memcpy(b, &f->buf, sizeof(*b)); | |
a6c2ba28 | 1419 | |
9aeb4b05 MCC |
1420 | if (f->vma_use_count) |
1421 | b->flags |= V4L2_BUF_FLAG_MAPPED; | |
a6c2ba28 | 1422 | |
9aeb4b05 MCC |
1423 | return 0; |
1424 | } | |
a6c2ba28 | 1425 | default: |
3acf2809 MCC |
1426 | return em28xx_do_ioctl(inode, filp, dev, cmd, arg, |
1427 | em28xx_video_do_ioctl); | |
a6c2ba28 | 1428 | } |
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | /* | |
3acf2809 MCC |
1433 | * em28xx_v4l2_ioctl() |
1434 | * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl() | |
a6c2ba28 | 1435 | */ |
3acf2809 | 1436 | static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp, |
a6c2ba28 | 1437 | unsigned int cmd, unsigned long arg) |
1438 | { | |
a6c2ba28 | 1439 | int ret = 0; |
3acf2809 | 1440 | struct em28xx *dev = filp->private_data; |
a6c2ba28 | 1441 | |
3593cab5 | 1442 | if (mutex_lock_interruptible(&dev->fileop_lock)) |
a6c2ba28 | 1443 | return -ERESTARTSYS; |
1444 | ||
1445 | if (dev->state & DEV_DISCONNECTED) { | |
3acf2809 | 1446 | em28xx_errdev("v4l2 ioctl: device not present\n"); |
3593cab5 | 1447 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 1448 | return -ENODEV; |
1449 | } | |
1450 | ||
1451 | if (dev->state & DEV_MISCONFIGURED) { | |
3acf2809 | 1452 | em28xx_errdev |
a6c2ba28 | 1453 | ("v4l2 ioctl: device is misconfigured; close and open it again\n"); |
3593cab5 | 1454 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 1455 | return -EIO; |
1456 | } | |
1457 | ||
3acf2809 | 1458 | ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl); |
a6c2ba28 | 1459 | |
3593cab5 | 1460 | mutex_unlock(&dev->fileop_lock); |
a6c2ba28 | 1461 | |
1462 | return ret; | |
1463 | } | |
1464 | ||
fa027c2a | 1465 | static const struct file_operations em28xx_v4l_fops = { |
a6c2ba28 | 1466 | .owner = THIS_MODULE, |
3acf2809 MCC |
1467 | .open = em28xx_v4l2_open, |
1468 | .release = em28xx_v4l2_close, | |
1469 | .ioctl = em28xx_v4l2_ioctl, | |
1470 | .read = em28xx_v4l2_read, | |
1471 | .poll = em28xx_v4l2_poll, | |
1472 | .mmap = em28xx_v4l2_mmap, | |
a6c2ba28 | 1473 | .llseek = no_llseek, |
17cbe2e5 MCC |
1474 | .compat_ioctl = v4l_compat_ioctl32, |
1475 | ||
a6c2ba28 | 1476 | }; |
1477 | ||
1478 | /******************************** usb interface *****************************************/ | |
1479 | ||
1480 | /* | |
3acf2809 | 1481 | * em28xx_init_dev() |
a6c2ba28 | 1482 | * allocates and inits the device structs, registers i2c bus and v4l device |
1483 | */ | |
3acf2809 | 1484 | static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, |
03910cc3 | 1485 | int minor) |
a6c2ba28 | 1486 | { |
3acf2809 | 1487 | struct em28xx *dev = *devhandle; |
a6c2ba28 | 1488 | int retval = -ENOMEM; |
1489 | int errCode, i; | |
1490 | unsigned int maxh, maxw; | |
a6c2ba28 | 1491 | |
a6c2ba28 | 1492 | dev->udev = udev; |
3593cab5 | 1493 | mutex_init(&dev->lock); |
a6c2ba28 | 1494 | init_waitqueue_head(&dev->open); |
1495 | ||
3acf2809 MCC |
1496 | dev->em28xx_write_regs = em28xx_write_regs; |
1497 | dev->em28xx_read_reg = em28xx_read_reg; | |
1498 | dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len; | |
1499 | dev->em28xx_write_regs_req = em28xx_write_regs_req; | |
1500 | dev->em28xx_read_reg_req = em28xx_read_reg_req; | |
a6c2ba28 | 1501 | |
1502 | /* setup video picture settings for saa7113h */ | |
1503 | memset(&dev->vpic, 0, sizeof(dev->vpic)); | |
1504 | dev->vpic.colour = 128 << 8; | |
1505 | dev->vpic.hue = 128 << 8; | |
1506 | dev->vpic.brightness = 128 << 8; | |
1507 | dev->vpic.contrast = 192 << 8; | |
1508 | dev->vpic.whiteness = 128 << 8; /* This one isn't used */ | |
1509 | dev->vpic.depth = 16; | |
1510 | dev->vpic.palette = VIDEO_PALETTE_YUV422; | |
1511 | ||
a94e95b4 | 1512 | em28xx_pre_card_setup(dev); |
03910cc3 | 1513 | |
3acf2809 | 1514 | errCode = em28xx_config(dev); |
a6c2ba28 | 1515 | if (errCode) { |
3acf2809 | 1516 | em28xx_errdev("error configuring device\n"); |
03910cc3 | 1517 | em28xx_devused &= ~(1<<dev->devno); |
7c908fbb | 1518 | kfree(dev); |
a6c2ba28 | 1519 | return -ENOMEM; |
1520 | } | |
1521 | ||
3593cab5 | 1522 | mutex_lock(&dev->lock); |
03910cc3 | 1523 | |
a6c2ba28 | 1524 | /* register i2c bus */ |
3acf2809 | 1525 | em28xx_i2c_register(dev); |
a6c2ba28 | 1526 | |
1527 | /* Do board specific init and eeprom reading */ | |
3acf2809 | 1528 | em28xx_card_setup(dev); |
a6c2ba28 | 1529 | |
1530 | /* configure the device */ | |
3acf2809 | 1531 | em28xx_config_i2c(dev); |
a6c2ba28 | 1532 | |
3593cab5 | 1533 | mutex_unlock(&dev->lock); |
a6c2ba28 | 1534 | |
03910cc3 MCC |
1535 | for (i = 0; i < TVNORMS; i++) |
1536 | if (em28xx_boards[dev->model].norm == tvnorms[i].mode) | |
1537 | break; | |
1538 | if (i == TVNORMS) | |
1539 | i = 0; | |
1540 | ||
1541 | dev->tvnorm = &tvnorms[i]; /* set default norm */ | |
1542 | ||
1543 | em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name); | |
1544 | ||
1545 | maxw = norm_maxw(dev); | |
1546 | maxh = norm_maxh(dev); | |
1547 | ||
1548 | /* set default image size */ | |
1549 | dev->width = maxw; | |
1550 | dev->height = maxh; | |
1551 | dev->interlaced = EM28XX_INTERLACED_DEFAULT; | |
1552 | dev->field_size = dev->width * dev->height; | |
1553 | dev->frame_size = | |
1554 | dev->interlaced ? dev->field_size << 1 : dev->field_size; | |
1555 | dev->bytesperline = dev->width * 2; | |
1556 | dev->hscale = 0; | |
1557 | dev->vscale = 0; | |
1558 | dev->ctl_input = 2; | |
1559 | ||
3acf2809 | 1560 | errCode = em28xx_config(dev); |
a6c2ba28 | 1561 | |
a6c2ba28 | 1562 | /* allocate and fill v4l2 device struct */ |
1563 | dev->vdev = video_device_alloc(); | |
1564 | if (NULL == dev->vdev) { | |
3acf2809 | 1565 | em28xx_errdev("cannot allocate video_device.\n"); |
e5589bef | 1566 | em28xx_devused&=~(1<<dev->devno); |
7c908fbb | 1567 | kfree(dev); |
e5589bef MCC |
1568 | return -ENOMEM; |
1569 | } | |
1570 | ||
1571 | dev->vbi_dev = video_device_alloc(); | |
1572 | if (NULL == dev->vbi_dev) { | |
1573 | em28xx_errdev("cannot allocate video_device.\n"); | |
1574 | kfree(dev->vdev); | |
e5589bef | 1575 | em28xx_devused&=~(1<<dev->devno); |
7c908fbb | 1576 | kfree(dev); |
a6c2ba28 | 1577 | return -ENOMEM; |
1578 | } | |
1579 | ||
e5589bef MCC |
1580 | /* Fills VBI device info */ |
1581 | dev->vbi_dev->type = VFL_TYPE_VBI; | |
e5589bef MCC |
1582 | dev->vbi_dev->fops = &em28xx_v4l_fops; |
1583 | dev->vbi_dev->minor = -1; | |
1584 | dev->vbi_dev->dev = &dev->udev->dev; | |
1585 | dev->vbi_dev->release = video_device_release; | |
1586 | snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s", | |
1587 | "em28xx",dev->devno,"vbi"); | |
1588 | ||
1589 | /* Fills CAPTURE device info */ | |
a6c2ba28 | 1590 | dev->vdev->type = VID_TYPE_CAPTURE; |
1591 | if (dev->has_tuner) | |
1592 | dev->vdev->type |= VID_TYPE_TUNER; | |
3acf2809 | 1593 | dev->vdev->fops = &em28xx_v4l_fops; |
a6c2ba28 | 1594 | dev->vdev->minor = -1; |
1595 | dev->vdev->dev = &dev->udev->dev; | |
1596 | dev->vdev->release = video_device_release; | |
e5589bef MCC |
1597 | snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s", |
1598 | "em28xx",dev->devno,"video"); | |
1599 | ||
3acf2809 | 1600 | list_add_tail(&dev->devlist,&em28xx_devlist); |
a6c2ba28 | 1601 | |
1602 | /* register v4l2 device */ | |
3593cab5 | 1603 | mutex_lock(&dev->lock); |
e5589bef MCC |
1604 | if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, |
1605 | video_nr[dev->devno]))) { | |
3acf2809 | 1606 | em28xx_errdev("unable to register video device (error=%i).\n", |
a6c2ba28 | 1607 | retval); |
3593cab5 | 1608 | mutex_unlock(&dev->lock); |
9c75541f | 1609 | list_del(&dev->devlist); |
a6c2ba28 | 1610 | video_device_release(dev->vdev); |
e5589bef | 1611 | em28xx_devused&=~(1<<dev->devno); |
7c908fbb | 1612 | kfree(dev); |
a6c2ba28 | 1613 | return -ENODEV; |
1614 | } | |
e5589bef MCC |
1615 | |
1616 | if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI, | |
1617 | vbi_nr[dev->devno]) < 0) { | |
1618 | printk("unable to register vbi device\n"); | |
3593cab5 | 1619 | mutex_unlock(&dev->lock); |
e5589bef MCC |
1620 | list_del(&dev->devlist); |
1621 | video_device_release(dev->vbi_dev); | |
1622 | video_device_release(dev->vdev); | |
e5589bef | 1623 | em28xx_devused&=~(1<<dev->devno); |
7c908fbb | 1624 | kfree(dev); |
e5589bef MCC |
1625 | return -ENODEV; |
1626 | } else { | |
1627 | printk("registered VBI\n"); | |
1628 | } | |
1629 | ||
a6c2ba28 | 1630 | if (dev->has_msp34xx) { |
1631 | /* Send a reset to other chips via gpio */ | |
3acf2809 | 1632 | em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); |
9a2816c1 | 1633 | msleep(3); |
3acf2809 | 1634 | em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1); |
9a2816c1 | 1635 | msleep(3); |
a6c2ba28 | 1636 | |
1637 | } | |
1638 | video_mux(dev, 0); | |
1639 | ||
3593cab5 | 1640 | mutex_unlock(&dev->lock); |
a6c2ba28 | 1641 | |
e5589bef MCC |
1642 | em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n", |
1643 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, | |
1644 | dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); | |
a6c2ba28 | 1645 | |
a6c2ba28 | 1646 | return 0; |
1647 | } | |
1648 | ||
1649 | /* | |
3acf2809 | 1650 | * em28xx_usb_probe() |
a6c2ba28 | 1651 | * checks for supported devices |
1652 | */ | |
3acf2809 | 1653 | static int em28xx_usb_probe(struct usb_interface *interface, |
a6c2ba28 | 1654 | const struct usb_device_id *id) |
1655 | { | |
1656 | const struct usb_endpoint_descriptor *endpoint; | |
1657 | struct usb_device *udev; | |
9d4d9c05 | 1658 | struct usb_interface *uif; |
3acf2809 | 1659 | struct em28xx *dev = NULL; |
a6c2ba28 | 1660 | int retval = -ENODEV; |
03910cc3 | 1661 | int i, nr, ifnum; |
a6c2ba28 | 1662 | |
1663 | udev = usb_get_dev(interface_to_usbdev(interface)); | |
d5e52653 MCC |
1664 | ifnum = interface->altsetting[0].desc.bInterfaceNumber; |
1665 | ||
e5589bef MCC |
1666 | /* Check to see next free device and mark as used */ |
1667 | nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS); | |
1668 | em28xx_devused|=1<<nr; | |
a6c2ba28 | 1669 | |
596d92d5 | 1670 | /* Don't register audio interfaces */ |
91cad0f2 | 1671 | if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { |
3acf2809 | 1672 | em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n", |
91cad0f2 MCC |
1673 | udev->descriptor.idVendor,udev->descriptor.idProduct, |
1674 | ifnum, | |
1675 | interface->altsetting[0].desc.bInterfaceClass); | |
e5589bef MCC |
1676 | |
1677 | em28xx_devused&=~(1<<nr); | |
596d92d5 | 1678 | return -ENODEV; |
91cad0f2 MCC |
1679 | } |
1680 | ||
3acf2809 | 1681 | em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n", |
91cad0f2 MCC |
1682 | udev->descriptor.idVendor,udev->descriptor.idProduct, |
1683 | ifnum, | |
1684 | interface->altsetting[0].desc.bInterfaceClass); | |
596d92d5 | 1685 | |
d5e52653 MCC |
1686 | endpoint = &interface->cur_altsetting->endpoint[1].desc; |
1687 | ||
59c51591 | 1688 | /* check if the device has the iso in endpoint at the correct place */ |
a6c2ba28 | 1689 | if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != |
1690 | USB_ENDPOINT_XFER_ISOC) { | |
3acf2809 | 1691 | em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); |
e5589bef | 1692 | em28xx_devused&=~(1<<nr); |
a6c2ba28 | 1693 | return -ENODEV; |
1694 | } | |
1695 | if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { | |
3acf2809 | 1696 | em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); |
e5589bef | 1697 | em28xx_devused&=~(1<<nr); |
a6c2ba28 | 1698 | return -ENODEV; |
1699 | } | |
1700 | ||
19478843 | 1701 | if (nr >= EM28XX_MAXBOARDS) { |
9d4d9c05 | 1702 | printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS); |
e5589bef | 1703 | em28xx_devused&=~(1<<nr); |
596d92d5 MCC |
1704 | return -ENOMEM; |
1705 | } | |
1706 | ||
1707 | /* allocate memory for our device state and initialize it */ | |
7408187d | 1708 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
596d92d5 | 1709 | if (dev == NULL) { |
3acf2809 | 1710 | em28xx_err(DRIVER_NAME ": out of memory!\n"); |
e5589bef | 1711 | em28xx_devused&=~(1<<nr); |
596d92d5 MCC |
1712 | return -ENOMEM; |
1713 | } | |
596d92d5 | 1714 | |
e5589bef | 1715 | snprintf(dev->name, 29, "em28xx #%d", nr); |
03910cc3 MCC |
1716 | dev->devno = nr; |
1717 | dev->model = id->driver_info; | |
e5589bef | 1718 | |
9d4d9c05 MCC |
1719 | /* compute alternate max packet sizes */ |
1720 | uif = udev->actconfig->interface[0]; | |
1721 | ||
1722 | dev->num_alt=uif->num_altsetting; | |
e5589bef | 1723 | em28xx_info("Alternate settings: %i\n",dev->num_alt); |
9d4d9c05 MCC |
1724 | // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* |
1725 | dev->alt_max_pkt_size = kmalloc(32* | |
1726 | dev->num_alt,GFP_KERNEL); | |
1727 | if (dev->alt_max_pkt_size == NULL) { | |
e5589bef MCC |
1728 | em28xx_errdev("out of memory!\n"); |
1729 | em28xx_devused&=~(1<<nr); | |
1207cf84 | 1730 | kfree(dev); |
9d4d9c05 MCC |
1731 | return -ENOMEM; |
1732 | } | |
1733 | ||
1734 | for (i = 0; i < dev->num_alt ; i++) { | |
1735 | u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. | |
1736 | wMaxPacketSize); | |
1737 | dev->alt_max_pkt_size[i] = | |
1738 | (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); | |
e5589bef | 1739 | em28xx_info("Alternate setting %i, max size= %i\n",i, |
9d4d9c05 MCC |
1740 | dev->alt_max_pkt_size[i]); |
1741 | } | |
1742 | ||
3acf2809 | 1743 | if ((card[nr]>=0)&&(card[nr]<em28xx_bcount)) |
03910cc3 | 1744 | dev->model = card[nr]; |
596d92d5 | 1745 | |
a6c2ba28 | 1746 | /* allocate device struct */ |
03910cc3 | 1747 | retval = em28xx_init_dev(&dev, udev, nr); |
a6c2ba28 | 1748 | if (retval) |
1749 | return retval; | |
1750 | ||
03910cc3 | 1751 | em28xx_info("Found %s\n", em28xx_boards[dev->model].name); |
a6c2ba28 | 1752 | |
1753 | /* save our data pointer in this interface device */ | |
1754 | usb_set_intfdata(interface, dev); | |
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | /* | |
3acf2809 | 1759 | * em28xx_usb_disconnect() |
a6c2ba28 | 1760 | * called when the device gets diconencted |
1761 | * video device will be unregistered on v4l2_close in case it is still open | |
1762 | */ | |
3acf2809 | 1763 | static void em28xx_usb_disconnect(struct usb_interface *interface) |
a6c2ba28 | 1764 | { |
3acf2809 | 1765 | struct em28xx *dev = usb_get_intfdata(interface); |
a6c2ba28 | 1766 | usb_set_intfdata(interface, NULL); |
1767 | ||
1768 | if (!dev) | |
1769 | return; | |
1770 | ||
3acf2809 | 1771 | down_write(&em28xx_disconnect); |
a6c2ba28 | 1772 | |
3593cab5 | 1773 | mutex_lock(&dev->lock); |
a6c2ba28 | 1774 | |
3acf2809 | 1775 | em28xx_info("disconnecting %s\n", dev->vdev->name); |
a6c2ba28 | 1776 | |
1777 | wake_up_interruptible_all(&dev->open); | |
1778 | ||
1779 | if (dev->users) { | |
3acf2809 | 1780 | em28xx_warn |
a6c2ba28 | 1781 | ("device /dev/video%d is open! Deregistration and memory " |
e5589bef MCC |
1782 | "deallocation are deferred on close.\n", |
1783 | dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); | |
1784 | ||
a6c2ba28 | 1785 | dev->state |= DEV_MISCONFIGURED; |
3acf2809 | 1786 | em28xx_uninit_isoc(dev); |
a6c2ba28 | 1787 | dev->state |= DEV_DISCONNECTED; |
1788 | wake_up_interruptible(&dev->wait_frame); | |
1789 | wake_up_interruptible(&dev->wait_stream); | |
1790 | } else { | |
1791 | dev->state |= DEV_DISCONNECTED; | |
3acf2809 | 1792 | em28xx_release_resources(dev); |
a6c2ba28 | 1793 | } |
1794 | ||
3593cab5 | 1795 | mutex_unlock(&dev->lock); |
a6c2ba28 | 1796 | |
9d4d9c05 MCC |
1797 | if (!dev->users) { |
1798 | kfree(dev->alt_max_pkt_size); | |
a6c2ba28 | 1799 | kfree(dev); |
9d4d9c05 | 1800 | } |
a6c2ba28 | 1801 | |
3acf2809 | 1802 | up_write(&em28xx_disconnect); |
a6c2ba28 | 1803 | } |
1804 | ||
3acf2809 | 1805 | static struct usb_driver em28xx_usb_driver = { |
3acf2809 MCC |
1806 | .name = "em28xx", |
1807 | .probe = em28xx_usb_probe, | |
1808 | .disconnect = em28xx_usb_disconnect, | |
1809 | .id_table = em28xx_id_table, | |
a6c2ba28 | 1810 | }; |
1811 | ||
3acf2809 | 1812 | static int __init em28xx_module_init(void) |
a6c2ba28 | 1813 | { |
1814 | int result; | |
1815 | ||
1816 | printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n", | |
3acf2809 MCC |
1817 | (EM28XX_VERSION_CODE >> 16) & 0xff, |
1818 | (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff); | |
a6c2ba28 | 1819 | #ifdef SNAPSHOT |
1820 | printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n", | |
1821 | SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100); | |
1822 | #endif | |
1823 | ||
1824 | /* register this driver with the USB subsystem */ | |
3acf2809 | 1825 | result = usb_register(&em28xx_usb_driver); |
a6c2ba28 | 1826 | if (result) |
3acf2809 | 1827 | em28xx_err(DRIVER_NAME |
a6c2ba28 | 1828 | " usb_register failed. Error number %d.\n", result); |
1829 | ||
1830 | return result; | |
1831 | } | |
1832 | ||
3acf2809 | 1833 | static void __exit em28xx_module_exit(void) |
a6c2ba28 | 1834 | { |
1835 | /* deregister this driver with the USB subsystem */ | |
3acf2809 | 1836 | usb_deregister(&em28xx_usb_driver); |
a6c2ba28 | 1837 | } |
1838 | ||
3acf2809 MCC |
1839 | module_init(em28xx_module_init); |
1840 | module_exit(em28xx_module_exit); |