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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / media / usb / msi2500 / msi2500.c
blob65ef755adfdc1ee51828c3b044b26751c1f76b05
1 /*
2 * Mirics MSi2500 driver
3 * Mirics MSi3101 SDR Dongle driver
4 *
5 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * That driver is somehow based of pwc driver:
18 * (C) 1999-2004 Nemosoft Unv.
19 * (C) 2004-2006 Luc Saillard (luc@saillard.org)
20 * (C) 2011 Hans de Goede <hdegoede@redhat.com>
21 */
22
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <asm/div64.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
28 #include <media/v4l2-ctrls.h>
29 #include <media/v4l2-event.h>
30 #include <linux/usb.h>
31 #include <media/videobuf2-v4l2.h>
32 #include <media/videobuf2-vmalloc.h>
33 #include <linux/spi/spi.h>
34
35 static bool msi2500_emulated_fmt;
36 module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
37 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
38
39 /*
40 * iConfiguration 0
41 * bInterfaceNumber 0
42 * bAlternateSetting 1
43 * bNumEndpoints 1
44 * bEndpointAddress 0x81 EP 1 IN
45 * bmAttributes 1
46 * Transfer Type Isochronous
47 * wMaxPacketSize 0x1400 3x 1024 bytes
48 * bInterval 1
49 */
50 #define MAX_ISO_BUFS (8)
51 #define ISO_FRAMES_PER_DESC (8)
52 #define ISO_MAX_FRAME_SIZE (3 * 1024)
53 #define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
54 #define MAX_ISOC_ERRORS 20
55
56 /*
57 * TODO: These formats should be moved to V4L2 API. Formats are currently
58 * disabled from formats[] table, not visible to userspace.
59 */
60 /* signed 12-bit */
61 #define MSI2500_PIX_FMT_SDR_S12 v4l2_fourcc('D', 'S', '1', '2')
62 /* Mirics MSi2500 format 384 */
63 #define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
64
65 static const struct v4l2_frequency_band bands[] = {
66 {
67 .tuner = 0,
68 .type = V4L2_TUNER_ADC,
69 .index = 0,
70 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
71 .rangelow = 1200000,
72 .rangehigh = 15000000,
73 },
74 };
75
76 /* stream formats */
77 struct msi2500_format {
78 char *name;
79 u32 pixelformat;
80 u32 buffersize;
81 };
82
83 /* format descriptions for capture and preview */
84 static struct msi2500_format formats[] = {
85 {
86 .name = "Complex S8",
87 .pixelformat = V4L2_SDR_FMT_CS8,
88 .buffersize = 3 * 1008,
89 #if 0
90 }, {
91 .name = "10+2-bit signed",
92 .pixelformat = MSI2500_PIX_FMT_SDR_MSI2500_384,
93 }, {
94 .name = "12-bit signed",
95 .pixelformat = MSI2500_PIX_FMT_SDR_S12,
96 #endif
97 }, {
98 .name = "Complex S14LE",
99 .pixelformat = V4L2_SDR_FMT_CS14LE,
100 .buffersize = 3 * 1008,
101 }, {
102 .name = "Complex U8 (emulated)",
103 .pixelformat = V4L2_SDR_FMT_CU8,
104 .buffersize = 3 * 1008,
105 }, {
106 .name = "Complex U16LE (emulated)",
107 .pixelformat = V4L2_SDR_FMT_CU16LE,
108 .buffersize = 3 * 1008,
109 },
110 };
111
112 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
113
114 /* intermediate buffers with raw data from the USB device */
115 struct msi2500_frame_buf {
116 /* common v4l buffer stuff -- must be first */
117 struct vb2_v4l2_buffer vb;
118 struct list_head list;
119 };
120
121 struct msi2500_dev {
122 struct device *dev;
123 struct video_device vdev;
124 struct v4l2_device v4l2_dev;
125 struct v4l2_subdev *v4l2_subdev;
126 struct spi_master *master;
127
128 /* videobuf2 queue and queued buffers list */
129 struct vb2_queue vb_queue;
130 struct list_head queued_bufs;
131 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
132
133 /* Note if taking both locks v4l2_lock must always be locked first! */
134 struct mutex v4l2_lock; /* Protects everything else */
135 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
136
137 /* Pointer to our usb_device, will be NULL after unplug */
138 struct usb_device *udev; /* Both mutexes most be hold when setting! */
139
140 unsigned int f_adc;
141 u32 pixelformat;
142 u32 buffersize;
143 unsigned int num_formats;
144
145 unsigned int isoc_errors; /* number of contiguous ISOC errors */
146 unsigned int vb_full; /* vb is full and packets dropped */
147
148 struct urb *urbs[MAX_ISO_BUFS];
149
150 /* Controls */
151 struct v4l2_ctrl_handler hdl;
152
153 u32 next_sample; /* for track lost packets */
154 u32 sample; /* for sample rate calc */
155 unsigned long jiffies_next;
156 };
157
158 /* Private functions */
159 static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
160 struct msi2500_dev *dev)
161 {
162 unsigned long flags;
163 struct msi2500_frame_buf *buf = NULL;
164
165 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
166 if (list_empty(&dev->queued_bufs))
167 goto leave;
168
169 buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
170 list_del(&buf->list);
171 leave:
172 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
173 return buf;
174 }
175
176 /*
177 * +===========================================================================
178 * | 00-1023 | USB packet type '504'
179 * +===========================================================================
180 * | 00- 03 | sequence number of first sample in that USB packet
181 * +---------------------------------------------------------------------------
182 * | 04- 15 | garbage
183 * +---------------------------------------------------------------------------
184 * | 16-1023 | samples
185 * +---------------------------------------------------------------------------
186 * signed 8-bit sample
187 * 504 * 2 = 1008 samples
188 *
189 *
190 * +===========================================================================
191 * | 00-1023 | USB packet type '384'
192 * +===========================================================================
193 * | 00- 03 | sequence number of first sample in that USB packet
194 * +---------------------------------------------------------------------------
195 * | 04- 15 | garbage
196 * +---------------------------------------------------------------------------
197 * | 16- 175 | samples
198 * +---------------------------------------------------------------------------
199 * | 176- 179 | control bits for previous samples
200 * +---------------------------------------------------------------------------
201 * | 180- 339 | samples
202 * +---------------------------------------------------------------------------
203 * | 340- 343 | control bits for previous samples
204 * +---------------------------------------------------------------------------
205 * | 344- 503 | samples
206 * +---------------------------------------------------------------------------
207 * | 504- 507 | control bits for previous samples
208 * +---------------------------------------------------------------------------
209 * | 508- 667 | samples
210 * +---------------------------------------------------------------------------
211 * | 668- 671 | control bits for previous samples
212 * +---------------------------------------------------------------------------
213 * | 672- 831 | samples
214 * +---------------------------------------------------------------------------
215 * | 832- 835 | control bits for previous samples
216 * +---------------------------------------------------------------------------
217 * | 836- 995 | samples
218 * +---------------------------------------------------------------------------
219 * | 996- 999 | control bits for previous samples
220 * +---------------------------------------------------------------------------
221 * | 1000-1023 | garbage
222 * +---------------------------------------------------------------------------
223 *
224 * Bytes 4 - 7 could have some meaning?
225 *
226 * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
227 * numbers. This results one 2-bit number for 8 samples. It is likely used for
228 * for bit shifting sample by given bits, increasing actual sampling resolution.
229 * Number 2 (0b10) was never seen.
230 *
231 * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
232 *
233 *
234 * +===========================================================================
235 * | 00-1023 | USB packet type '336'
236 * +===========================================================================
237 * | 00- 03 | sequence number of first sample in that USB packet
238 * +---------------------------------------------------------------------------
239 * | 04- 15 | garbage
240 * +---------------------------------------------------------------------------
241 * | 16-1023 | samples
242 * +---------------------------------------------------------------------------
243 * signed 12-bit sample
244 *
245 *
246 * +===========================================================================
247 * | 00-1023 | USB packet type '252'
248 * +===========================================================================
249 * | 00- 03 | sequence number of first sample in that USB packet
250 * +---------------------------------------------------------------------------
251 * | 04- 15 | garbage
252 * +---------------------------------------------------------------------------
253 * | 16-1023 | samples
254 * +---------------------------------------------------------------------------
255 * signed 14-bit sample
256 */
257
258 static int msi2500_convert_stream(struct msi2500_dev *dev, u8 *dst, u8 *src,
259 unsigned int src_len)
260 {
261 unsigned int i, j, transactions, dst_len = 0;
262 u32 sample[3];
263
264 /* There could be 1-3 1024 byte transactions per packet */
265 transactions = src_len / 1024;
266
267 for (i = 0; i < transactions; i++) {
268 sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
269 src[0] << 0;
270 if (i == 0 && dev->next_sample != sample[0]) {
271 dev_dbg_ratelimited(dev->dev,
272 "%d samples lost, %d %08x:%08x\n",
273 sample[0] - dev->next_sample,
274 src_len, dev->next_sample,
275 sample[0]);
276 }
277
278 /*
279 * Dump all unknown 'garbage' data - maybe we will discover
280 * someday if there is something rational...
281 */
282 dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
283
284 src += 16; /* skip header */
285
286 switch (dev->pixelformat) {
287 case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
288 {
289 s8 *s8src = (s8 *)src;
290 u8 *u8dst = (u8 *)dst;
291
292 for (j = 0; j < 1008; j++)
293 *u8dst++ = *s8src++ + 128;
294
295 src += 1008;
296 dst += 1008;
297 dst_len += 1008;
298 dev->next_sample = sample[i] + 504;
299 break;
300 }
301 case V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
302 {
303 s16 *s16src = (s16 *)src;
304 u16 *u16dst = (u16 *)dst;
305 struct {signed int x:14; } se; /* sign extension */
306 unsigned int utmp;
307
308 for (j = 0; j < 1008; j += 2) {
309 /* sign extension from 14-bit to signed int */
310 se.x = *s16src++;
311 /* from signed int to unsigned int */
312 utmp = se.x + 8192;
313 /* from 14-bit to 16-bit */
314 *u16dst++ = utmp << 2 | utmp >> 12;
315 }
316
317 src += 1008;
318 dst += 1008;
319 dst_len += 1008;
320 dev->next_sample = sample[i] + 252;
321 break;
322 }
323 case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
324 /* Dump unknown 'garbage' data */
325 dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
326 memcpy(dst, src, 984);
327 src += 984 + 24;
328 dst += 984;
329 dst_len += 984;
330 dev->next_sample = sample[i] + 384;
331 break;
332 case V4L2_SDR_FMT_CS8: /* 504 x IQ samples */
333 memcpy(dst, src, 1008);
334 src += 1008;
335 dst += 1008;
336 dst_len += 1008;
337 dev->next_sample = sample[i] + 504;
338 break;
339 case MSI2500_PIX_FMT_SDR_S12: /* 336 x IQ samples */
340 memcpy(dst, src, 1008);
341 src += 1008;
342 dst += 1008;
343 dst_len += 1008;
344 dev->next_sample = sample[i] + 336;
345 break;
346 case V4L2_SDR_FMT_CS14LE: /* 252 x IQ samples */
347 memcpy(dst, src, 1008);
348 src += 1008;
349 dst += 1008;
350 dst_len += 1008;
351 dev->next_sample = sample[i] + 252;
352 break;
353 default:
354 break;
355 }
356 }
357
358 /* calculate sample rate and output it in 10 seconds intervals */
359 if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
360 #define MSECS 10000UL
361 unsigned int msecs = jiffies_to_msecs(jiffies -
362 dev->jiffies_next + msecs_to_jiffies(MSECS));
363 unsigned int samples = dev->next_sample - dev->sample;
364
365 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
366 dev->sample = dev->next_sample;
367 dev_dbg(dev->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
368 src_len, samples, msecs,
369 samples * 1000UL / msecs);
370 }
371
372 return dst_len;
373 }
374
375 /*
376 * This gets called for the Isochronous pipe (stream). This is done in interrupt
377 * time, so it has to be fast, not crash, and not stall. Neat.
378 */
379 static void msi2500_isoc_handler(struct urb *urb)
380 {
381 struct msi2500_dev *dev = (struct msi2500_dev *)urb->context;
382 int i, flen, fstatus;
383 unsigned char *iso_buf = NULL;
384 struct msi2500_frame_buf *fbuf;
385
386 if (unlikely(urb->status == -ENOENT ||
387 urb->status == -ECONNRESET ||
388 urb->status == -ESHUTDOWN)) {
389 dev_dbg(dev->dev, "URB (%p) unlinked %ssynchronously\n",
390 urb, urb->status == -ENOENT ? "" : "a");
391 return;
392 }
393
394 if (unlikely(urb->status != 0)) {
395 dev_dbg(dev->dev, "called with status %d\n", urb->status);
396 /* Give up after a number of contiguous errors */
397 if (++dev->isoc_errors > MAX_ISOC_ERRORS)
398 dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
399 goto handler_end;
400 } else {
401 /* Reset ISOC error counter. We did get here, after all. */
402 dev->isoc_errors = 0;
403 }
404
405 /* Compact data */
406 for (i = 0; i < urb->number_of_packets; i++) {
407 void *ptr;
408
409 /* Check frame error */
410 fstatus = urb->iso_frame_desc[i].status;
411 if (unlikely(fstatus)) {
412 dev_dbg_ratelimited(dev->dev,
413 "frame=%d/%d has error %d skipping\n",
414 i, urb->number_of_packets, fstatus);
415 continue;
416 }
417
418 /* Check if that frame contains data */
419 flen = urb->iso_frame_desc[i].actual_length;
420 if (unlikely(flen == 0))
421 continue;
422
423 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
424
425 /* Get free framebuffer */
426 fbuf = msi2500_get_next_fill_buf(dev);
427 if (unlikely(fbuf == NULL)) {
428 dev->vb_full++;
429 dev_dbg_ratelimited(dev->dev,
430 "videobuf is full, %d packets dropped\n",
431 dev->vb_full);
432 continue;
433 }
434
435 /* fill framebuffer */
436 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
437 flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
438 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
439 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
440 }
441
442 handler_end:
443 i = usb_submit_urb(urb, GFP_ATOMIC);
444 if (unlikely(i != 0))
445 dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
446 }
447
448 static void msi2500_iso_stop(struct msi2500_dev *dev)
449 {
450 int i;
451
452 dev_dbg(dev->dev, "\n");
453
454 /* Unlinking ISOC buffers one by one */
455 for (i = 0; i < MAX_ISO_BUFS; i++) {
456 if (dev->urbs[i]) {
457 dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
458 usb_kill_urb(dev->urbs[i]);
459 }
460 }
461 }
462
463 static void msi2500_iso_free(struct msi2500_dev *dev)
464 {
465 int i;
466
467 dev_dbg(dev->dev, "\n");
468
469 /* Freeing ISOC buffers one by one */
470 for (i = 0; i < MAX_ISO_BUFS; i++) {
471 if (dev->urbs[i]) {
472 dev_dbg(dev->dev, "Freeing URB\n");
473 if (dev->urbs[i]->transfer_buffer) {
474 usb_free_coherent(dev->udev,
475 dev->urbs[i]->transfer_buffer_length,
476 dev->urbs[i]->transfer_buffer,
477 dev->urbs[i]->transfer_dma);
478 }
479 usb_free_urb(dev->urbs[i]);
480 dev->urbs[i] = NULL;
481 }
482 }
483 }
484
485 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
486 static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
487 {
488 dev_dbg(dev->dev, "\n");
489
490 msi2500_iso_stop(dev);
491 msi2500_iso_free(dev);
492 }
493
494 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
495 static int msi2500_isoc_init(struct msi2500_dev *dev)
496 {
497 struct urb *urb;
498 int i, j, ret;
499
500 dev_dbg(dev->dev, "\n");
501
502 dev->isoc_errors = 0;
503
504 ret = usb_set_interface(dev->udev, 0, 1);
505 if (ret)
506 return ret;
507
508 /* Allocate and init Isochronuous urbs */
509 for (i = 0; i < MAX_ISO_BUFS; i++) {
510 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
511 if (urb == NULL) {
512 msi2500_isoc_cleanup(dev);
513 return -ENOMEM;
514 }
515 dev->urbs[i] = urb;
516 dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
517
518 urb->interval = 1;
519 urb->dev = dev->udev;
520 urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
521 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
522 urb->transfer_buffer = usb_alloc_coherent(dev->udev,
523 ISO_BUFFER_SIZE,
524 GFP_KERNEL, &urb->transfer_dma);
525 if (urb->transfer_buffer == NULL) {
526 dev_err(dev->dev,
527 "Failed to allocate urb buffer %d\n", i);
528 msi2500_isoc_cleanup(dev);
529 return -ENOMEM;
530 }
531 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
532 urb->complete = msi2500_isoc_handler;
533 urb->context = dev;
534 urb->start_frame = 0;
535 urb->number_of_packets = ISO_FRAMES_PER_DESC;
536 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
537 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
538 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
539 }
540 }
541
542 /* link */
543 for (i = 0; i < MAX_ISO_BUFS; i++) {
544 ret = usb_submit_urb(dev->urbs[i], GFP_KERNEL);
545 if (ret) {
546 dev_err(dev->dev,
547 "usb_submit_urb %d failed with error %d\n",
548 i, ret);
549 msi2500_isoc_cleanup(dev);
550 return ret;
551 }
552 dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
553 }
554
555 /* All is done... */
556 return 0;
557 }
558
559 /* Must be called with vb_queue_lock hold */
560 static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
561 {
562 unsigned long flags;
563
564 dev_dbg(dev->dev, "\n");
565
566 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
567 while (!list_empty(&dev->queued_bufs)) {
568 struct msi2500_frame_buf *buf;
569
570 buf = list_entry(dev->queued_bufs.next,
571 struct msi2500_frame_buf, list);
572 list_del(&buf->list);
573 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
574 }
575 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
576 }
577
578 /* The user yanked out the cable... */
579 static void msi2500_disconnect(struct usb_interface *intf)
580 {
581 struct v4l2_device *v = usb_get_intfdata(intf);
582 struct msi2500_dev *dev =
583 container_of(v, struct msi2500_dev, v4l2_dev);
584
585 dev_dbg(dev->dev, "\n");
586
587 mutex_lock(&dev->vb_queue_lock);
588 mutex_lock(&dev->v4l2_lock);
589 /* No need to keep the urbs around after disconnection */
590 dev->udev = NULL;
591 v4l2_device_disconnect(&dev->v4l2_dev);
592 video_unregister_device(&dev->vdev);
593 spi_unregister_master(dev->master);
594 mutex_unlock(&dev->v4l2_lock);
595 mutex_unlock(&dev->vb_queue_lock);
596
597 v4l2_device_put(&dev->v4l2_dev);
598 }
599
600 static int msi2500_querycap(struct file *file, void *fh,
601 struct v4l2_capability *cap)
602 {
603 struct msi2500_dev *dev = video_drvdata(file);
604
605 dev_dbg(dev->dev, "\n");
606
607 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
608 strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
609 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
610 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
611 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
612 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
613 return 0;
614 }
615
616 /* Videobuf2 operations */
617 static int msi2500_queue_setup(struct vb2_queue *vq,
618 unsigned int *nbuffers,
619 unsigned int *nplanes, unsigned int sizes[],
620 struct device *alloc_devs[])
621 {
622 struct msi2500_dev *dev = vb2_get_drv_priv(vq);
623
624 dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
625
626 /* Absolute min and max number of buffers available for mmap() */
627 *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
628 *nplanes = 1;
629 sizes[0] = PAGE_ALIGN(dev->buffersize);
630 dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
631 return 0;
632 }
633
634 static void msi2500_buf_queue(struct vb2_buffer *vb)
635 {
636 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
637 struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
638 struct msi2500_frame_buf *buf = container_of(vbuf,
639 struct msi2500_frame_buf,
640 vb);
641 unsigned long flags;
642
643 /* Check the device has not disconnected between prep and queuing */
644 if (unlikely(!dev->udev)) {
645 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
646 return;
647 }
648
649 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
650 list_add_tail(&buf->list, &dev->queued_bufs);
651 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
652 }
653
654 #define CMD_WREG 0x41
655 #define CMD_START_STREAMING 0x43
656 #define CMD_STOP_STREAMING 0x45
657 #define CMD_READ_UNKNOWN 0x48
658
659 #define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
660 char *_direction; \
661 if (_t & USB_DIR_IN) \
662 _direction = "<<<"; \
663 else \
664 _direction = ">>>"; \
665 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
666 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
667 _l & 0xff, _l >> 8, _direction, _l, _b); \
668 }
669
670 static int msi2500_ctrl_msg(struct msi2500_dev *dev, u8 cmd, u32 data)
671 {
672 int ret;
673 u8 request = cmd;
674 u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
675 u16 value = (data >> 0) & 0xffff;
676 u16 index = (data >> 16) & 0xffff;
677
678 msi2500_dbg_usb_control_msg(dev->dev, request, requesttype,
679 value, index, NULL, 0);
680 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
681 requesttype, value, index, NULL, 0, 2000);
682 if (ret)
683 dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
684 ret, cmd, data);
685
686 return ret;
687 }
688
689 static int msi2500_set_usb_adc(struct msi2500_dev *dev)
690 {
691 int ret;
692 unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
693 u32 reg3, reg4, reg7;
694 struct v4l2_ctrl *bandwidth_auto;
695 struct v4l2_ctrl *bandwidth;
696
697 f_sr = dev->f_adc;
698
699 /* set tuner, subdev, filters according to sampling rate */
700 bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
701 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
702 if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
703 bandwidth = v4l2_ctrl_find(&dev->hdl,
704 V4L2_CID_RF_TUNER_BANDWIDTH);
705 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
706 }
707
708 /* select stream format */
709 switch (dev->pixelformat) {
710 case V4L2_SDR_FMT_CU8:
711 reg7 = 0x000c9407; /* 504 */
712 break;
713 case V4L2_SDR_FMT_CU16LE:
714 reg7 = 0x00009407; /* 252 */
715 break;
716 case V4L2_SDR_FMT_CS8:
717 reg7 = 0x000c9407; /* 504 */
718 break;
719 case MSI2500_PIX_FMT_SDR_MSI2500_384:
720 reg7 = 0x0000a507; /* 384 */
721 break;
722 case MSI2500_PIX_FMT_SDR_S12:
723 reg7 = 0x00008507; /* 336 */
724 break;
725 case V4L2_SDR_FMT_CS14LE:
726 reg7 = 0x00009407; /* 252 */
727 break;
728 default:
729 reg7 = 0x000c9407; /* 504 */
730 break;
731 }
732
733 /*
734 * Fractional-N synthesizer
735 *
736 * +----------------------------------------+
737 * v |
738 * Fref +----+ +-------+ +-----+ +------+ +---+
739 * ------> | PD | --> | VCO | --> | /2 | ------> | /N.F | <-- | K |
740 * +----+ +-------+ +-----+ +------+ +---+
741 * |
742 * |
743 * v
744 * +-------+ +-----+ Fout
745 * | /Rout | --> | /12 | ------>
746 * +-------+ +-----+
747 */
748 /*
749 * Synthesizer config is just a educated guess...
750 *
751 * [7:0] 0x03, register address
752 * [8] 1, power control
753 * [9] ?, power control
754 * [12:10] output divider
755 * [13] 0 ?
756 * [14] 0 ?
757 * [15] fractional MSB, bit 20
758 * [16:19] N
759 * [23:20] ?
760 * [24:31] 0x01
761 *
762 * output divider
763 * val div
764 * 0 - (invalid)
765 * 1 4
766 * 2 6
767 * 3 8
768 * 4 10
769 * 5 12
770 * 6 14
771 * 7 16
772 *
773 * VCO 202000000 - 720000000++
774 */
775
776 #define F_REF 24000000
777 #define DIV_PRE_N 2
778 #define DIV_LO_OUT 12
779 reg3 = 0x01000303;
780 reg4 = 0x00000004;
781
782 /* XXX: Filters? AGC? VCO band? */
783 if (f_sr < 6000000)
784 reg3 |= 0x1 << 20;
785 else if (f_sr < 7000000)
786 reg3 |= 0x5 << 20;
787 else if (f_sr < 8500000)
788 reg3 |= 0x9 << 20;
789 else
790 reg3 |= 0xd << 20;
791
792 for (div_out = 4; div_out < 16; div_out += 2) {
793 f_vco = f_sr * div_out * DIV_LO_OUT;
794 dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
795 if (f_vco >= 202000000)
796 break;
797 }
798
799 /* Calculate PLL integer and fractional control word. */
800 div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
801 k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
802
803 reg3 |= div_n << 16;
804 reg3 |= (div_out / 2 - 1) << 10;
805 reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
806 reg4 |= ((k_cw >> 0) & 0x0fffff) << 8; /* [19:0] */
807
808 dev_dbg(dev->dev,
809 "f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
810 f_sr, f_vco, div_n, k, div_out, reg3, reg4);
811
812 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
813 if (ret)
814 goto err;
815
816 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
817 if (ret)
818 goto err;
819
820 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
821 if (ret)
822 goto err;
823
824 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
825 if (ret)
826 goto err;
827
828 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
829 if (ret)
830 goto err;
831
832 ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
833 if (ret)
834 goto err;
835
836 ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
837 if (ret)
838 goto err;
839
840 ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
841 err:
842 return ret;
843 }
844
845 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
846 {
847 struct msi2500_dev *dev = vb2_get_drv_priv(vq);
848 int ret;
849
850 dev_dbg(dev->dev, "\n");
851
852 if (!dev->udev)
853 return -ENODEV;
854
855 if (mutex_lock_interruptible(&dev->v4l2_lock))
856 return -ERESTARTSYS;
857
858 /* wake-up tuner */
859 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
860
861 ret = msi2500_set_usb_adc(dev);
862
863 ret = msi2500_isoc_init(dev);
864 if (ret)
865 msi2500_cleanup_queued_bufs(dev);
866
867 ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
868
869 mutex_unlock(&dev->v4l2_lock);
870
871 return ret;
872 }
873
874 static void msi2500_stop_streaming(struct vb2_queue *vq)
875 {
876 struct msi2500_dev *dev = vb2_get_drv_priv(vq);
877
878 dev_dbg(dev->dev, "\n");
879
880 mutex_lock(&dev->v4l2_lock);
881
882 if (dev->udev)
883 msi2500_isoc_cleanup(dev);
884
885 msi2500_cleanup_queued_bufs(dev);
886
887 /* according to tests, at least 700us delay is required */
888 msleep(20);
889 if (!msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
890 /* sleep USB IF / ADC */
891 msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
892 }
893
894 /* sleep tuner */
895 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
896
897 mutex_unlock(&dev->v4l2_lock);
898 }
899
900 static const struct vb2_ops msi2500_vb2_ops = {
901 .queue_setup = msi2500_queue_setup,
902 .buf_queue = msi2500_buf_queue,
903 .start_streaming = msi2500_start_streaming,
904 .stop_streaming = msi2500_stop_streaming,
905 .wait_prepare = vb2_ops_wait_prepare,
906 .wait_finish = vb2_ops_wait_finish,
907 };
908
909 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
910 struct v4l2_fmtdesc *f)
911 {
912 struct msi2500_dev *dev = video_drvdata(file);
913
914 dev_dbg(dev->dev, "index=%d\n", f->index);
915
916 if (f->index >= dev->num_formats)
917 return -EINVAL;
918
919 strlcpy(f->description, formats[f->index].name, sizeof(f->description));
920 f->pixelformat = formats[f->index].pixelformat;
921
922 return 0;
923 }
924
925 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
926 struct v4l2_format *f)
927 {
928 struct msi2500_dev *dev = video_drvdata(file);
929
930 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
931 (char *)&dev->pixelformat);
932
933 f->fmt.sdr.pixelformat = dev->pixelformat;
934 f->fmt.sdr.buffersize = dev->buffersize;
935 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
936
937 return 0;
938 }
939
940 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
941 struct v4l2_format *f)
942 {
943 struct msi2500_dev *dev = video_drvdata(file);
944 struct vb2_queue *q = &dev->vb_queue;
945 int i;
946
947 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
948 (char *)&f->fmt.sdr.pixelformat);
949
950 if (vb2_is_busy(q))
951 return -EBUSY;
952
953 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
954 for (i = 0; i < dev->num_formats; i++) {
955 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
956 dev->pixelformat = formats[i].pixelformat;
957 dev->buffersize = formats[i].buffersize;
958 f->fmt.sdr.buffersize = formats[i].buffersize;
959 return 0;
960 }
961 }
962
963 dev->pixelformat = formats[0].pixelformat;
964 dev->buffersize = formats[0].buffersize;
965 f->fmt.sdr.pixelformat = formats[0].pixelformat;
966 f->fmt.sdr.buffersize = formats[0].buffersize;
967
968 return 0;
969 }
970
971 static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
972 struct v4l2_format *f)
973 {
974 struct msi2500_dev *dev = video_drvdata(file);
975 int i;
976
977 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
978 (char *)&f->fmt.sdr.pixelformat);
979
980 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
981 for (i = 0; i < dev->num_formats; i++) {
982 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
983 f->fmt.sdr.buffersize = formats[i].buffersize;
984 return 0;
985 }
986 }
987
988 f->fmt.sdr.pixelformat = formats[0].pixelformat;
989 f->fmt.sdr.buffersize = formats[0].buffersize;
990
991 return 0;
992 }
993
994 static int msi2500_s_tuner(struct file *file, void *priv,
995 const struct v4l2_tuner *v)
996 {
997 struct msi2500_dev *dev = video_drvdata(file);
998 int ret;
999
1000 dev_dbg(dev->dev, "index=%d\n", v->index);
1001
1002 if (v->index == 0)
1003 ret = 0;
1004 else if (v->index == 1)
1005 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
1006 else
1007 ret = -EINVAL;
1008
1009 return ret;
1010 }
1011
1012 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
1013 {
1014 struct msi2500_dev *dev = video_drvdata(file);
1015 int ret;
1016
1017 dev_dbg(dev->dev, "index=%d\n", v->index);
1018
1019 if (v->index == 0) {
1020 strlcpy(v->name, "Mirics MSi2500", sizeof(v->name));
1021 v->type = V4L2_TUNER_ADC;
1022 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1023 v->rangelow = 1200000;
1024 v->rangehigh = 15000000;
1025 ret = 0;
1026 } else if (v->index == 1) {
1027 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1028 } else {
1029 ret = -EINVAL;
1030 }
1031
1032 return ret;
1033 }
1034
1035 static int msi2500_g_frequency(struct file *file, void *priv,
1036 struct v4l2_frequency *f)
1037 {
1038 struct msi2500_dev *dev = video_drvdata(file);
1039 int ret = 0;
1040
1041 dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1042
1043 if (f->tuner == 0) {
1044 f->frequency = dev->f_adc;
1045 ret = 0;
1046 } else if (f->tuner == 1) {
1047 f->type = V4L2_TUNER_RF;
1048 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1049 } else {
1050 ret = -EINVAL;
1051 }
1052
1053 return ret;
1054 }
1055
1056 static int msi2500_s_frequency(struct file *file, void *priv,
1057 const struct v4l2_frequency *f)
1058 {
1059 struct msi2500_dev *dev = video_drvdata(file);
1060 int ret;
1061
1062 dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
1063 f->tuner, f->type, f->frequency);
1064
1065 if (f->tuner == 0) {
1066 dev->f_adc = clamp_t(unsigned int, f->frequency,
1067 bands[0].rangelow,
1068 bands[0].rangehigh);
1069 dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1070 ret = msi2500_set_usb_adc(dev);
1071 } else if (f->tuner == 1) {
1072 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1073 } else {
1074 ret = -EINVAL;
1075 }
1076
1077 return ret;
1078 }
1079
1080 static int msi2500_enum_freq_bands(struct file *file, void *priv,
1081 struct v4l2_frequency_band *band)
1082 {
1083 struct msi2500_dev *dev = video_drvdata(file);
1084 int ret;
1085
1086 dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
1087 band->tuner, band->type, band->index);
1088
1089 if (band->tuner == 0) {
1090 if (band->index >= ARRAY_SIZE(bands)) {
1091 ret = -EINVAL;
1092 } else {
1093 *band = bands[band->index];
1094 ret = 0;
1095 }
1096 } else if (band->tuner == 1) {
1097 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner,
1098 enum_freq_bands, band);
1099 } else {
1100 ret = -EINVAL;
1101 }
1102
1103 return ret;
1104 }
1105
1106 static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1107 .vidioc_querycap = msi2500_querycap,
1108
1109 .vidioc_enum_fmt_sdr_cap = msi2500_enum_fmt_sdr_cap,
1110 .vidioc_g_fmt_sdr_cap = msi2500_g_fmt_sdr_cap,
1111 .vidioc_s_fmt_sdr_cap = msi2500_s_fmt_sdr_cap,
1112 .vidioc_try_fmt_sdr_cap = msi2500_try_fmt_sdr_cap,
1113
1114 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1115 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1116 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1117 .vidioc_querybuf = vb2_ioctl_querybuf,
1118 .vidioc_qbuf = vb2_ioctl_qbuf,
1119 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1120
1121 .vidioc_streamon = vb2_ioctl_streamon,
1122 .vidioc_streamoff = vb2_ioctl_streamoff,
1123
1124 .vidioc_g_tuner = msi2500_g_tuner,
1125 .vidioc_s_tuner = msi2500_s_tuner,
1126
1127 .vidioc_g_frequency = msi2500_g_frequency,
1128 .vidioc_s_frequency = msi2500_s_frequency,
1129 .vidioc_enum_freq_bands = msi2500_enum_freq_bands,
1130
1131 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1132 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1133 .vidioc_log_status = v4l2_ctrl_log_status,
1134 };
1135
1136 static const struct v4l2_file_operations msi2500_fops = {
1137 .owner = THIS_MODULE,
1138 .open = v4l2_fh_open,
1139 .release = vb2_fop_release,
1140 .read = vb2_fop_read,
1141 .poll = vb2_fop_poll,
1142 .mmap = vb2_fop_mmap,
1143 .unlocked_ioctl = video_ioctl2,
1144 };
1145
1146 static const struct video_device msi2500_template = {
1147 .name = "Mirics MSi3101 SDR Dongle",
1148 .release = video_device_release_empty,
1149 .fops = &msi2500_fops,
1150 .ioctl_ops = &msi2500_ioctl_ops,
1151 };
1152
1153 static void msi2500_video_release(struct v4l2_device *v)
1154 {
1155 struct msi2500_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
1156
1157 v4l2_ctrl_handler_free(&dev->hdl);
1158 v4l2_device_unregister(&dev->v4l2_dev);
1159 kfree(dev);
1160 }
1161
1162 static int msi2500_transfer_one_message(struct spi_master *master,
1163 struct spi_message *m)
1164 {
1165 struct msi2500_dev *dev = spi_master_get_devdata(master);
1166 struct spi_transfer *t;
1167 int ret = 0;
1168 u32 data;
1169
1170 list_for_each_entry(t, &m->transfers, transfer_list) {
1171 dev_dbg(dev->dev, "msg=%*ph\n", t->len, t->tx_buf);
1172 data = 0x09; /* reg 9 is SPI adapter */
1173 data |= ((u8 *)t->tx_buf)[0] << 8;
1174 data |= ((u8 *)t->tx_buf)[1] << 16;
1175 data |= ((u8 *)t->tx_buf)[2] << 24;
1176 ret = msi2500_ctrl_msg(dev, CMD_WREG, data);
1177 }
1178
1179 m->status = ret;
1180 spi_finalize_current_message(master);
1181 return ret;
1182 }
1183
1184 static int msi2500_probe(struct usb_interface *intf,
1185 const struct usb_device_id *id)
1186 {
1187 struct msi2500_dev *dev;
1188 struct v4l2_subdev *sd;
1189 struct spi_master *master;
1190 int ret;
1191 static struct spi_board_info board_info = {
1192 .modalias = "msi001",
1193 .bus_num = 0,
1194 .chip_select = 0,
1195 .max_speed_hz = 12000000,
1196 };
1197
1198 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1199 if (!dev) {
1200 ret = -ENOMEM;
1201 goto err;
1202 }
1203
1204 mutex_init(&dev->v4l2_lock);
1205 mutex_init(&dev->vb_queue_lock);
1206 spin_lock_init(&dev->queued_bufs_lock);
1207 INIT_LIST_HEAD(&dev->queued_bufs);
1208 dev->dev = &intf->dev;
1209 dev->udev = interface_to_usbdev(intf);
1210 dev->f_adc = bands[0].rangelow;
1211 dev->pixelformat = formats[0].pixelformat;
1212 dev->buffersize = formats[0].buffersize;
1213 dev->num_formats = NUM_FORMATS;
1214 if (!msi2500_emulated_fmt)
1215 dev->num_formats -= 2;
1216
1217 /* Init videobuf2 queue structure */
1218 dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1219 dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1220 dev->vb_queue.drv_priv = dev;
1221 dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1222 dev->vb_queue.ops = &msi2500_vb2_ops;
1223 dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1224 dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1225 ret = vb2_queue_init(&dev->vb_queue);
1226 if (ret) {
1227 dev_err(dev->dev, "Could not initialize vb2 queue\n");
1228 goto err_free_mem;
1229 }
1230
1231 /* Init video_device structure */
1232 dev->vdev = msi2500_template;
1233 dev->vdev.queue = &dev->vb_queue;
1234 dev->vdev.queue->lock = &dev->vb_queue_lock;
1235 video_set_drvdata(&dev->vdev, dev);
1236
1237 /* Register the v4l2_device structure */
1238 dev->v4l2_dev.release = msi2500_video_release;
1239 ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1240 if (ret) {
1241 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
1242 goto err_free_mem;
1243 }
1244
1245 /* SPI master adapter */
1246 master = spi_alloc_master(dev->dev, 0);
1247 if (master == NULL) {
1248 ret = -ENOMEM;
1249 goto err_unregister_v4l2_dev;
1250 }
1251
1252 dev->master = master;
1253 master->bus_num = 0;
1254 master->num_chipselect = 1;
1255 master->transfer_one_message = msi2500_transfer_one_message;
1256 spi_master_set_devdata(master, dev);
1257 ret = spi_register_master(master);
1258 if (ret) {
1259 spi_master_put(master);
1260 goto err_unregister_v4l2_dev;
1261 }
1262
1263 /* load v4l2 subdevice */
1264 sd = v4l2_spi_new_subdev(&dev->v4l2_dev, master, &board_info);
1265 dev->v4l2_subdev = sd;
1266 if (sd == NULL) {
1267 dev_err(dev->dev, "cannot get v4l2 subdevice\n");
1268 ret = -ENODEV;
1269 goto err_unregister_master;
1270 }
1271
1272 /* Register controls */
1273 v4l2_ctrl_handler_init(&dev->hdl, 0);
1274 if (dev->hdl.error) {
1275 ret = dev->hdl.error;
1276 dev_err(dev->dev, "Could not initialize controls\n");
1277 goto err_free_controls;
1278 }
1279
1280 /* currently all controls are from subdev */
1281 v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL);
1282
1283 dev->v4l2_dev.ctrl_handler = &dev->hdl;
1284 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1285 dev->vdev.lock = &dev->v4l2_lock;
1286
1287 ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1288 if (ret) {
1289 dev_err(dev->dev,
1290 "Failed to register as video device (%d)\n", ret);
1291 goto err_unregister_v4l2_dev;
1292 }
1293 dev_info(dev->dev, "Registered as %s\n",
1294 video_device_node_name(&dev->vdev));
1295 dev_notice(dev->dev,
1296 "SDR API is still slightly experimental and functionality changes may follow\n");
1297 return 0;
1298 err_free_controls:
1299 v4l2_ctrl_handler_free(&dev->hdl);
1300 err_unregister_master:
1301 spi_unregister_master(dev->master);
1302 err_unregister_v4l2_dev:
1303 v4l2_device_unregister(&dev->v4l2_dev);
1304 err_free_mem:
1305 kfree(dev);
1306 err:
1307 return ret;
1308 }
1309
1310 /* USB device ID list */
1311 static const struct usb_device_id msi2500_id_table[] = {
1312 {USB_DEVICE(0x1df7, 0x2500)}, /* Mirics MSi3101 SDR Dongle */
1313 {USB_DEVICE(0x2040, 0xd300)}, /* Hauppauge WinTV 133559 LF */
1314 {}
1315 };
1316 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1317
1318 /* USB subsystem interface */
1319 static struct usb_driver msi2500_driver = {
1320 .name = KBUILD_MODNAME,
1321 .probe = msi2500_probe,
1322 .disconnect = msi2500_disconnect,
1323 .id_table = msi2500_id_table,
1324 };
1325
1326 module_usb_driver(msi2500_driver);
1327
1328 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1329 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1330 MODULE_LICENSE("GPL");
Linux with added FPC-III support