1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Mirics MSi2500 driver
4 * Mirics MSi3101 SDR Dongle driver
5 *
6 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
7 *
8 * That driver is somehow based of pwc driver:
9 * (C) 1999-2004 Nemosoft Unv.
10 * (C) 2004-2006 Luc Saillard (luc@saillard.org)
11 * (C) 2011 Hans de Goede <hdegoede@redhat.com>
12 */
13
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <asm/div64.h>
17 #include <media/v4l2-device.h>
18 #include <media/v4l2-ioctl.h>
19 #include <media/v4l2-ctrls.h>
20 #include <media/v4l2-event.h>
21 #include <linux/usb.h>
22 #include <media/videobuf2-v4l2.h>
23 #include <media/videobuf2-vmalloc.h>
24 #include <linux/spi/spi.h>
25
26 static bool msi2500_emulated_fmt;
27 module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
28 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
29
30 /*
31 * iConfiguration 0
32 * bInterfaceNumber 0
33 * bAlternateSetting 1
34 * bNumEndpoints 1
35 * bEndpointAddress 0x81 EP 1 IN
36 * bmAttributes 1
37 * Transfer Type Isochronous
38 * wMaxPacketSize 0x1400 3x 1024 bytes
39 * bInterval 1
40 */
41 #define MAX_ISO_BUFS (8)
42 #define ISO_FRAMES_PER_DESC (8)
43 #define ISO_MAX_FRAME_SIZE (3 * 1024)
44 #define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
45 #define MAX_ISOC_ERRORS 20
46
47 /*
48 * TODO: These formats should be moved to V4L2 API. Formats are currently
49 * disabled from formats[] table, not visible to userspace.
50 */
51 /* signed 12-bit */
52 #define MSI2500_PIX_FMT_SDR_S12 v4l2_fourcc('D', 'S', '1', '2')
53 /* Mirics MSi2500 format 384 */
54 #define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
55
56 static const struct v4l2_frequency_band bands[] = {
57 {
58 .tuner = 0,
59 .type = V4L2_TUNER_ADC,
60 .index = 0,
61 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
62 .rangelow = 1200000,
63 .rangehigh = 15000000,
64 },
65 };
66
67 /* stream formats */
68 struct msi2500_format {
69 u32 pixelformat;
70 u32 buffersize;
71 };
72
73 /* format descriptions for capture and preview */
74 static struct msi2500_format formats[] = {
75 {
76 .pixelformat = V4L2_SDR_FMT_CS8,
77 .buffersize = 3 * 1008,
78 #if 0
79 }, {
80 .pixelformat = MSI2500_PIX_FMT_SDR_MSI2500_384,
81 }, {
82 .pixelformat = MSI2500_PIX_FMT_SDR_S12,
83 #endif
84 }, {
85 .pixelformat = V4L2_SDR_FMT_CS14LE,
86 .buffersize = 3 * 1008,
87 }, {
88 .pixelformat = V4L2_SDR_FMT_CU8,
89 .buffersize = 3 * 1008,
90 }, {
91 .pixelformat = V4L2_SDR_FMT_CU16LE,
92 .buffersize = 3 * 1008,
93 },
94 };
95
96 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
97
98 /* intermediate buffers with raw data from the USB device */
99 struct msi2500_frame_buf {
100 /* common v4l buffer stuff -- must be first */
101 struct vb2_v4l2_buffer vb;
102 struct list_head list;
103 };
104
105 struct msi2500_dev {
106 struct device *dev;
107 struct video_device vdev;
108 struct v4l2_device v4l2_dev;
109 struct v4l2_subdev *v4l2_subdev;
110 struct spi_master *master;
111
112 /* videobuf2 queue and queued buffers list */
113 struct vb2_queue vb_queue;
114 struct list_head queued_bufs;
115 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
116
117 /* Note if taking both locks v4l2_lock must always be locked first! */
118 struct mutex v4l2_lock; /* Protects everything else */
119 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
120
121 /* Pointer to our usb_device, will be NULL after unplug */
122 struct usb_device *udev; /* Both mutexes most be hold when setting! */
123
124 unsigned int f_adc;
125 u32 pixelformat;
126 u32 buffersize;
127 unsigned int num_formats;
128
129 unsigned int isoc_errors; /* number of contiguous ISOC errors */
130 unsigned int vb_full; /* vb is full and packets dropped */
131
132 struct urb *urbs[MAX_ISO_BUFS];
133
134 /* Controls */
135 struct v4l2_ctrl_handler hdl;
136
137 u32 next_sample; /* for track lost packets */
138 u32 sample; /* for sample rate calc */
139 unsigned long jiffies_next;
140 };
141
142 /* Private functions */
msi2500_get_next_fill_buf(struct msi2500_dev * dev)143 static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
144 struct msi2500_dev *dev)
145 {
146 unsigned long flags;
147 struct msi2500_frame_buf *buf = NULL;
148
149 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
150 if (list_empty(&dev->queued_bufs))
151 goto leave;
152
153 buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
154 list_del(&buf->list);
155 leave:
156 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
157 return buf;
158 }
159
160 /*
161 * +===========================================================================
162 * | 00-1023 | USB packet type '504'
163 * +===========================================================================
164 * | 00- 03 | sequence number of first sample in that USB packet
165 * +---------------------------------------------------------------------------
166 * | 04- 15 | garbage
167 * +---------------------------------------------------------------------------
168 * | 16-1023 | samples
169 * +---------------------------------------------------------------------------
170 * signed 8-bit sample
171 * 504 * 2 = 1008 samples
172 *
173 *
174 * +===========================================================================
175 * | 00-1023 | USB packet type '384'
176 * +===========================================================================
177 * | 00- 03 | sequence number of first sample in that USB packet
178 * +---------------------------------------------------------------------------
179 * | 04- 15 | garbage
180 * +---------------------------------------------------------------------------
181 * | 16- 175 | samples
182 * +---------------------------------------------------------------------------
183 * | 176- 179 | control bits for previous samples
184 * +---------------------------------------------------------------------------
185 * | 180- 339 | samples
186 * +---------------------------------------------------------------------------
187 * | 340- 343 | control bits for previous samples
188 * +---------------------------------------------------------------------------
189 * | 344- 503 | samples
190 * +---------------------------------------------------------------------------
191 * | 504- 507 | control bits for previous samples
192 * +---------------------------------------------------------------------------
193 * | 508- 667 | samples
194 * +---------------------------------------------------------------------------
195 * | 668- 671 | control bits for previous samples
196 * +---------------------------------------------------------------------------
197 * | 672- 831 | samples
198 * +---------------------------------------------------------------------------
199 * | 832- 835 | control bits for previous samples
200 * +---------------------------------------------------------------------------
201 * | 836- 995 | samples
202 * +---------------------------------------------------------------------------
203 * | 996- 999 | control bits for previous samples
204 * +---------------------------------------------------------------------------
205 * | 1000-1023 | garbage
206 * +---------------------------------------------------------------------------
207 *
208 * Bytes 4 - 7 could have some meaning?
209 *
210 * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
211 * numbers. This results one 2-bit number for 8 samples. It is likely used for
212 * for bit shifting sample by given bits, increasing actual sampling resolution.
213 * Number 2 (0b10) was never seen.
214 *
215 * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
216 *
217 *
218 * +===========================================================================
219 * | 00-1023 | USB packet type '336'
220 * +===========================================================================
221 * | 00- 03 | sequence number of first sample in that USB packet
222 * +---------------------------------------------------------------------------
223 * | 04- 15 | garbage
224 * +---------------------------------------------------------------------------
225 * | 16-1023 | samples
226 * +---------------------------------------------------------------------------
227 * signed 12-bit sample
228 *
229 *
230 * +===========================================================================
231 * | 00-1023 | USB packet type '252'
232 * +===========================================================================
233 * | 00- 03 | sequence number of first sample in that USB packet
234 * +---------------------------------------------------------------------------
235 * | 04- 15 | garbage
236 * +---------------------------------------------------------------------------
237 * | 16-1023 | samples
238 * +---------------------------------------------------------------------------
239 * signed 14-bit sample
240 */
241
msi2500_convert_stream(struct msi2500_dev * dev,u8 * dst,u8 * src,unsigned int src_len)242 static int msi2500_convert_stream(struct msi2500_dev *dev, u8 *dst, u8 *src,
243 unsigned int src_len)
244 {
245 unsigned int i, j, transactions, dst_len = 0;
246 u32 sample[3];
247
248 /* There could be 1-3 1024 byte transactions per packet */
249 transactions = src_len / 1024;
250
251 for (i = 0; i < transactions; i++) {
252 sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
253 src[0] << 0;
254 if (i == 0 && dev->next_sample != sample[0]) {
255 dev_dbg_ratelimited(dev->dev,
256 "%d samples lost, %d %08x:%08x\n",
257 sample[0] - dev->next_sample,
258 src_len, dev->next_sample,
259 sample[0]);
260 }
261
262 /*
263 * Dump all unknown 'garbage' data - maybe we will discover
264 * someday if there is something rational...
265 */
266 dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
267
268 src += 16; /* skip header */
269
270 switch (dev->pixelformat) {
271 case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
272 {
273 s8 *s8src = (s8 *)src;
274 u8 *u8dst = (u8 *)dst;
275
276 for (j = 0; j < 1008; j++)
277 *u8dst++ = *s8src++ + 128;
278
279 src += 1008;
280 dst += 1008;
281 dst_len += 1008;
282 dev->next_sample = sample[i] + 504;
283 break;
284 }
285 case V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
286 {
287 s16 *s16src = (s16 *)src;
288 u16 *u16dst = (u16 *)dst;
289 struct {signed int x:14; } se; /* sign extension */
290 unsigned int utmp;
291
292 for (j = 0; j < 1008; j += 2) {
293 /* sign extension from 14-bit to signed int */
294 se.x = *s16src++;
295 /* from signed int to unsigned int */
296 utmp = se.x + 8192;
297 /* from 14-bit to 16-bit */
298 *u16dst++ = utmp << 2 | utmp >> 12;
299 }
300
301 src += 1008;
302 dst += 1008;
303 dst_len += 1008;
304 dev->next_sample = sample[i] + 252;
305 break;
306 }
307 case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
308 /* Dump unknown 'garbage' data */
309 dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
310 memcpy(dst, src, 984);
311 src += 984 + 24;
312 dst += 984;
313 dst_len += 984;
314 dev->next_sample = sample[i] + 384;
315 break;
316 case V4L2_SDR_FMT_CS8: /* 504 x IQ samples */
317 memcpy(dst, src, 1008);
318 src += 1008;
319 dst += 1008;
320 dst_len += 1008;
321 dev->next_sample = sample[i] + 504;
322 break;
323 case MSI2500_PIX_FMT_SDR_S12: /* 336 x IQ samples */
324 memcpy(dst, src, 1008);
325 src += 1008;
326 dst += 1008;
327 dst_len += 1008;
328 dev->next_sample = sample[i] + 336;
329 break;
330 case V4L2_SDR_FMT_CS14LE: /* 252 x IQ samples */
331 memcpy(dst, src, 1008);
332 src += 1008;
333 dst += 1008;
334 dst_len += 1008;
335 dev->next_sample = sample[i] + 252;
336 break;
337 default:
338 break;
339 }
340 }
341
342 /* calculate sample rate and output it in 10 seconds intervals */
343 if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
344 #define MSECS 10000UL
345 unsigned int msecs = jiffies_to_msecs(jiffies -
346 dev->jiffies_next + msecs_to_jiffies(MSECS));
347 unsigned int samples = dev->next_sample - dev->sample;
348
349 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
350 dev->sample = dev->next_sample;
351 dev_dbg(dev->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
352 src_len, samples, msecs,
353 samples * 1000UL / msecs);
354 }
355
356 return dst_len;
357 }
358
359 /*
360 * This gets called for the Isochronous pipe (stream). This is done in interrupt
361 * time, so it has to be fast, not crash, and not stall. Neat.
362 */
msi2500_isoc_handler(struct urb * urb)363 static void msi2500_isoc_handler(struct urb *urb)
364 {
365 struct msi2500_dev *dev = (struct msi2500_dev *)urb->context;
366 int i, flen, fstatus;
367 unsigned char *iso_buf = NULL;
368 struct msi2500_frame_buf *fbuf;
369
370 if (unlikely(urb->status == -ENOENT ||
371 urb->status == -ECONNRESET ||
372 urb->status == -ESHUTDOWN)) {
373 dev_dbg(dev->dev, "URB (%p) unlinked %ssynchronously\n",
374 urb, urb->status == -ENOENT ? "" : "a");
375 return;
376 }
377
378 if (unlikely(urb->status != 0)) {
379 dev_dbg(dev->dev, "called with status %d\n", urb->status);
380 /* Give up after a number of contiguous errors */
381 if (++dev->isoc_errors > MAX_ISOC_ERRORS)
382 dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
383 goto handler_end;
384 } else {
385 /* Reset ISOC error counter. We did get here, after all. */
386 dev->isoc_errors = 0;
387 }
388
389 /* Compact data */
390 for (i = 0; i < urb->number_of_packets; i++) {
391 void *ptr;
392
393 /* Check frame error */
394 fstatus = urb->iso_frame_desc[i].status;
395 if (unlikely(fstatus)) {
396 dev_dbg_ratelimited(dev->dev,
397 "frame=%d/%d has error %d skipping\n",
398 i, urb->number_of_packets, fstatus);
399 continue;
400 }
401
402 /* Check if that frame contains data */
403 flen = urb->iso_frame_desc[i].actual_length;
404 if (unlikely(flen == 0))
405 continue;
406
407 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
408
409 /* Get free framebuffer */
410 fbuf = msi2500_get_next_fill_buf(dev);
411 if (unlikely(fbuf == NULL)) {
412 dev->vb_full++;
413 dev_dbg_ratelimited(dev->dev,
414 "videobuf is full, %d packets dropped\n",
415 dev->vb_full);
416 continue;
417 }
418
419 /* fill framebuffer */
420 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
421 flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
422 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
423 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
424 }
425
426 handler_end:
427 i = usb_submit_urb(urb, GFP_ATOMIC);
428 if (unlikely(i != 0))
429 dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
430 }
431
msi2500_iso_stop(struct msi2500_dev * dev)432 static void msi2500_iso_stop(struct msi2500_dev *dev)
433 {
434 int i;
435
436 dev_dbg(dev->dev, "\n");
437
438 /* Unlinking ISOC buffers one by one */
439 for (i = 0; i < MAX_ISO_BUFS; i++) {
440 if (dev->urbs[i]) {
441 dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
442 usb_kill_urb(dev->urbs[i]);
443 }
444 }
445 }
446
msi2500_iso_free(struct msi2500_dev * dev)447 static void msi2500_iso_free(struct msi2500_dev *dev)
448 {
449 int i;
450
451 dev_dbg(dev->dev, "\n");
452
453 /* Freeing ISOC buffers one by one */
454 for (i = 0; i < MAX_ISO_BUFS; i++) {
455 if (dev->urbs[i]) {
456 dev_dbg(dev->dev, "Freeing URB\n");
457 if (dev->urbs[i]->transfer_buffer) {
458 usb_free_coherent(dev->udev,
459 dev->urbs[i]->transfer_buffer_length,
460 dev->urbs[i]->transfer_buffer,
461 dev->urbs[i]->transfer_dma);
462 }
463 usb_free_urb(dev->urbs[i]);
464 dev->urbs[i] = NULL;
465 }
466 }
467 }
468
469 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
msi2500_isoc_cleanup(struct msi2500_dev * dev)470 static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
471 {
472 dev_dbg(dev->dev, "\n");
473
474 msi2500_iso_stop(dev);
475 msi2500_iso_free(dev);
476 }
477
478 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
msi2500_isoc_init(struct msi2500_dev * dev)479 static int msi2500_isoc_init(struct msi2500_dev *dev)
480 {
481 struct urb *urb;
482 int i, j, ret;
483
484 dev_dbg(dev->dev, "\n");
485
486 dev->isoc_errors = 0;
487
488 ret = usb_set_interface(dev->udev, 0, 1);
489 if (ret)
490 return ret;
491
492 /* Allocate and init Isochronuous urbs */
493 for (i = 0; i < MAX_ISO_BUFS; i++) {
494 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
495 if (urb == NULL) {
496 msi2500_isoc_cleanup(dev);
497 return -ENOMEM;
498 }
499 dev->urbs[i] = urb;
500 dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
501
502 urb->interval = 1;
503 urb->dev = dev->udev;
504 urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
505 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
506 urb->transfer_buffer = usb_alloc_coherent(dev->udev,
507 ISO_BUFFER_SIZE,
508 GFP_KERNEL, &urb->transfer_dma);
509 if (urb->transfer_buffer == NULL) {
510 dev_err(dev->dev,
511 "Failed to allocate urb buffer %d\n", i);
512 msi2500_isoc_cleanup(dev);
513 return -ENOMEM;
514 }
515 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
516 urb->complete = msi2500_isoc_handler;
517 urb->context = dev;
518 urb->start_frame = 0;
519 urb->number_of_packets = ISO_FRAMES_PER_DESC;
520 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
521 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
522 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
523 }
524 }
525
526 /* link */
527 for (i = 0; i < MAX_ISO_BUFS; i++) {
528 ret = usb_submit_urb(dev->urbs[i], GFP_KERNEL);
529 if (ret) {
530 dev_err(dev->dev,
531 "usb_submit_urb %d failed with error %d\n",
532 i, ret);
533 msi2500_isoc_cleanup(dev);
534 return ret;
535 }
536 dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
537 }
538
539 /* All is done... */
540 return 0;
541 }
542
543 /* Must be called with vb_queue_lock hold */
msi2500_cleanup_queued_bufs(struct msi2500_dev * dev)544 static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
545 {
546 unsigned long flags;
547
548 dev_dbg(dev->dev, "\n");
549
550 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
551 while (!list_empty(&dev->queued_bufs)) {
552 struct msi2500_frame_buf *buf;
553
554 buf = list_entry(dev->queued_bufs.next,
555 struct msi2500_frame_buf, list);
556 list_del(&buf->list);
557 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
558 }
559 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
560 }
561
562 /* The user yanked out the cable... */
msi2500_disconnect(struct usb_interface * intf)563 static void msi2500_disconnect(struct usb_interface *intf)
564 {
565 struct v4l2_device *v = usb_get_intfdata(intf);
566 struct msi2500_dev *dev =
567 container_of(v, struct msi2500_dev, v4l2_dev);
568
569 dev_dbg(dev->dev, "\n");
570
571 mutex_lock(&dev->vb_queue_lock);
572 mutex_lock(&dev->v4l2_lock);
573 /* No need to keep the urbs around after disconnection */
574 dev->udev = NULL;
575 v4l2_device_disconnect(&dev->v4l2_dev);
576 video_unregister_device(&dev->vdev);
577 spi_unregister_master(dev->master);
578 mutex_unlock(&dev->v4l2_lock);
579 mutex_unlock(&dev->vb_queue_lock);
580
581 v4l2_device_put(&dev->v4l2_dev);
582 }
583
msi2500_querycap(struct file * file,void * fh,struct v4l2_capability * cap)584 static int msi2500_querycap(struct file *file, void *fh,
585 struct v4l2_capability *cap)
586 {
587 struct msi2500_dev *dev = video_drvdata(file);
588
589 dev_dbg(dev->dev, "\n");
590
591 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
592 strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
593 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
594 return 0;
595 }
596
597 /* Videobuf2 operations */
msi2500_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])598 static int msi2500_queue_setup(struct vb2_queue *vq,
599 unsigned int *nbuffers,
600 unsigned int *nplanes, unsigned int sizes[],
601 struct device *alloc_devs[])
602 {
603 struct msi2500_dev *dev = vb2_get_drv_priv(vq);
604
605 dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
606
607 /* Absolute min and max number of buffers available for mmap() */
608 *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
609 *nplanes = 1;
610 sizes[0] = PAGE_ALIGN(dev->buffersize);
611 dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
612 return 0;
613 }
614
msi2500_buf_queue(struct vb2_buffer * vb)615 static void msi2500_buf_queue(struct vb2_buffer *vb)
616 {
617 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
618 struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
619 struct msi2500_frame_buf *buf = container_of(vbuf,
620 struct msi2500_frame_buf,
621 vb);
622 unsigned long flags;
623
624 /* Check the device has not disconnected between prep and queuing */
625 if (unlikely(!dev->udev)) {
626 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
627 return;
628 }
629
630 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
631 list_add_tail(&buf->list, &dev->queued_bufs);
632 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
633 }
634
635 #define CMD_WREG 0x41
636 #define CMD_START_STREAMING 0x43
637 #define CMD_STOP_STREAMING 0x45
638 #define CMD_READ_UNKNOWN 0x48
639
640 #define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
641 char *_direction; \
642 if (_t & USB_DIR_IN) \
643 _direction = "<<<"; \
644 else \
645 _direction = ">>>"; \
646 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
647 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
648 _l & 0xff, _l >> 8, _direction, _l, _b); \
649 }
650
msi2500_ctrl_msg(struct msi2500_dev * dev,u8 cmd,u32 data)651 static int msi2500_ctrl_msg(struct msi2500_dev *dev, u8 cmd, u32 data)
652 {
653 int ret;
654 u8 request = cmd;
655 u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
656 u16 value = (data >> 0) & 0xffff;
657 u16 index = (data >> 16) & 0xffff;
658
659 msi2500_dbg_usb_control_msg(dev->dev, request, requesttype,
660 value, index, NULL, 0);
661 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
662 requesttype, value, index, NULL, 0, 2000);
663 if (ret)
664 dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
665 ret, cmd, data);
666
667 return ret;
668 }
669
msi2500_set_usb_adc(struct msi2500_dev * dev)670 static int msi2500_set_usb_adc(struct msi2500_dev *dev)
671 {
672 int ret;
673 unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
674 u32 reg3, reg4, reg7;
675 struct v4l2_ctrl *bandwidth_auto;
676 struct v4l2_ctrl *bandwidth;
677
678 f_sr = dev->f_adc;
679
680 /* set tuner, subdev, filters according to sampling rate */
681 bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
682 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
683 if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
684 bandwidth = v4l2_ctrl_find(&dev->hdl,
685 V4L2_CID_RF_TUNER_BANDWIDTH);
686 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
687 }
688
689 /* select stream format */
690 switch (dev->pixelformat) {
691 case V4L2_SDR_FMT_CU8:
692 reg7 = 0x000c9407; /* 504 */
693 break;
694 case V4L2_SDR_FMT_CU16LE:
695 reg7 = 0x00009407; /* 252 */
696 break;
697 case V4L2_SDR_FMT_CS8:
698 reg7 = 0x000c9407; /* 504 */
699 break;
700 case MSI2500_PIX_FMT_SDR_MSI2500_384:
701 reg7 = 0x0000a507; /* 384 */
702 break;
703 case MSI2500_PIX_FMT_SDR_S12:
704 reg7 = 0x00008507; /* 336 */
705 break;
706 case V4L2_SDR_FMT_CS14LE:
707 reg7 = 0x00009407; /* 252 */
708 break;
709 default:
710 reg7 = 0x000c9407; /* 504 */
711 break;
712 }
713
714 /*
715 * Fractional-N synthesizer
716 *
717 * +----------------------------------------+
718 * v |
719 * Fref +----+ +-------+ +-----+ +------+ +---+
720 * ------> | PD | --> | VCO | --> | /2 | ------> | /N.F | <-- | K |
721 * +----+ +-------+ +-----+ +------+ +---+
722 * |
723 * |
724 * v
725 * +-------+ +-----+ Fout
726 * | /Rout | --> | /12 | ------>
727 * +-------+ +-----+
728 */
729 /*
730 * Synthesizer config is just a educated guess...
731 *
732 * [7:0] 0x03, register address
733 * [8] 1, power control
734 * [9] ?, power control
735 * [12:10] output divider
736 * [13] 0 ?
737 * [14] 0 ?
738 * [15] fractional MSB, bit 20
739 * [16:19] N
740 * [23:20] ?
741 * [24:31] 0x01
742 *
743 * output divider
744 * val div
745 * 0 - (invalid)
746 * 1 4
747 * 2 6
748 * 3 8
749 * 4 10
750 * 5 12
751 * 6 14
752 * 7 16
753 *
754 * VCO 202000000 - 720000000++
755 */
756
757 #define F_REF 24000000
758 #define DIV_PRE_N 2
759 #define DIV_LO_OUT 12
760 reg3 = 0x01000303;
761 reg4 = 0x00000004;
762
763 /* XXX: Filters? AGC? VCO band? */
764 if (f_sr < 6000000)
765 reg3 |= 0x1 << 20;
766 else if (f_sr < 7000000)
767 reg3 |= 0x5 << 20;
768 else if (f_sr < 8500000)
769 reg3 |= 0x9 << 20;
770 else
771 reg3 |= 0xd << 20;
772
773 for (div_out = 4; div_out < 16; div_out += 2) {
774 f_vco = f_sr * div_out * DIV_LO_OUT;
775 dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
776 if (f_vco >= 202000000)
777 break;
778 }
779
780 /* Calculate PLL integer and fractional control word. */
781 div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
782 k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
783
784 reg3 |= div_n << 16;
785 reg3 |= (div_out / 2 - 1) << 10;
786 reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
787 reg4 |= ((k_cw >> 0) & 0x0fffff) << 8; /* [19:0] */
788
789 dev_dbg(dev->dev,
790 "f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
791 f_sr, f_vco, div_n, k, div_out, reg3, reg4);
792
793 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
794 if (ret)
795 goto err;
796
797 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
798 if (ret)
799 goto err;
800
801 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
802 if (ret)
803 goto err;
804
805 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
806 if (ret)
807 goto err;
808
809 ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
810 if (ret)
811 goto err;
812
813 ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
814 if (ret)
815 goto err;
816
817 ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
818 if (ret)
819 goto err;
820
821 ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
822 err:
823 return ret;
824 }
825
msi2500_start_streaming(struct vb2_queue * vq,unsigned int count)826 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
827 {
828 struct msi2500_dev *dev = vb2_get_drv_priv(vq);
829 int ret;
830
831 dev_dbg(dev->dev, "\n");
832
833 if (!dev->udev)
834 return -ENODEV;
835
836 if (mutex_lock_interruptible(&dev->v4l2_lock))
837 return -ERESTARTSYS;
838
839 /* wake-up tuner */
840 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
841
842 ret = msi2500_set_usb_adc(dev);
843
844 ret = msi2500_isoc_init(dev);
845 if (ret)
846 msi2500_cleanup_queued_bufs(dev);
847
848 ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
849
850 mutex_unlock(&dev->v4l2_lock);
851
852 return ret;
853 }
854
msi2500_stop_streaming(struct vb2_queue * vq)855 static void msi2500_stop_streaming(struct vb2_queue *vq)
856 {
857 struct msi2500_dev *dev = vb2_get_drv_priv(vq);
858
859 dev_dbg(dev->dev, "\n");
860
861 mutex_lock(&dev->v4l2_lock);
862
863 if (dev->udev)
864 msi2500_isoc_cleanup(dev);
865
866 msi2500_cleanup_queued_bufs(dev);
867
868 /* according to tests, at least 700us delay is required */
869 msleep(20);
870 if (dev->udev && !msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
871 /* sleep USB IF / ADC */
872 msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
873 }
874
875 /* sleep tuner */
876 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
877
878 mutex_unlock(&dev->v4l2_lock);
879 }
880
881 static const struct vb2_ops msi2500_vb2_ops = {
882 .queue_setup = msi2500_queue_setup,
883 .buf_queue = msi2500_buf_queue,
884 .start_streaming = msi2500_start_streaming,
885 .stop_streaming = msi2500_stop_streaming,
886 .wait_prepare = vb2_ops_wait_prepare,
887 .wait_finish = vb2_ops_wait_finish,
888 };
889
msi2500_enum_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)890 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
891 struct v4l2_fmtdesc *f)
892 {
893 struct msi2500_dev *dev = video_drvdata(file);
894
895 dev_dbg(dev->dev, "index=%d\n", f->index);
896
897 if (f->index >= dev->num_formats)
898 return -EINVAL;
899
900 f->pixelformat = formats[f->index].pixelformat;
901
902 return 0;
903 }
904
msi2500_g_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)905 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
906 struct v4l2_format *f)
907 {
908 struct msi2500_dev *dev = video_drvdata(file);
909
910 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
911 (char *)&dev->pixelformat);
912
913 f->fmt.sdr.pixelformat = dev->pixelformat;
914 f->fmt.sdr.buffersize = dev->buffersize;
915 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
916
917 return 0;
918 }
919
msi2500_s_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)920 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
921 struct v4l2_format *f)
922 {
923 struct msi2500_dev *dev = video_drvdata(file);
924 struct vb2_queue *q = &dev->vb_queue;
925 int i;
926
927 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
928 (char *)&f->fmt.sdr.pixelformat);
929
930 if (vb2_is_busy(q))
931 return -EBUSY;
932
933 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
934 for (i = 0; i < dev->num_formats; i++) {
935 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
936 dev->pixelformat = formats[i].pixelformat;
937 dev->buffersize = formats[i].buffersize;
938 f->fmt.sdr.buffersize = formats[i].buffersize;
939 return 0;
940 }
941 }
942
943 dev->pixelformat = formats[0].pixelformat;
944 dev->buffersize = formats[0].buffersize;
945 f->fmt.sdr.pixelformat = formats[0].pixelformat;
946 f->fmt.sdr.buffersize = formats[0].buffersize;
947
948 return 0;
949 }
950
msi2500_try_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)951 static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
952 struct v4l2_format *f)
953 {
954 struct msi2500_dev *dev = video_drvdata(file);
955 int i;
956
957 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
958 (char *)&f->fmt.sdr.pixelformat);
959
960 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
961 for (i = 0; i < dev->num_formats; i++) {
962 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
963 f->fmt.sdr.buffersize = formats[i].buffersize;
964 return 0;
965 }
966 }
967
968 f->fmt.sdr.pixelformat = formats[0].pixelformat;
969 f->fmt.sdr.buffersize = formats[0].buffersize;
970
971 return 0;
972 }
973
msi2500_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * v)974 static int msi2500_s_tuner(struct file *file, void *priv,
975 const struct v4l2_tuner *v)
976 {
977 struct msi2500_dev *dev = video_drvdata(file);
978 int ret;
979
980 dev_dbg(dev->dev, "index=%d\n", v->index);
981
982 if (v->index == 0)
983 ret = 0;
984 else if (v->index == 1)
985 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
986 else
987 ret = -EINVAL;
988
989 return ret;
990 }
991
msi2500_g_tuner(struct file * file,void * priv,struct v4l2_tuner * v)992 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
993 {
994 struct msi2500_dev *dev = video_drvdata(file);
995 int ret;
996
997 dev_dbg(dev->dev, "index=%d\n", v->index);
998
999 if (v->index == 0) {
1000 strscpy(v->name, "Mirics MSi2500", sizeof(v->name));
1001 v->type = V4L2_TUNER_ADC;
1002 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1003 v->rangelow = 1200000;
1004 v->rangehigh = 15000000;
1005 ret = 0;
1006 } else if (v->index == 1) {
1007 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1008 } else {
1009 ret = -EINVAL;
1010 }
1011
1012 return ret;
1013 }
1014
msi2500_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)1015 static int msi2500_g_frequency(struct file *file, void *priv,
1016 struct v4l2_frequency *f)
1017 {
1018 struct msi2500_dev *dev = video_drvdata(file);
1019 int ret = 0;
1020
1021 dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1022
1023 if (f->tuner == 0) {
1024 f->frequency = dev->f_adc;
1025 ret = 0;
1026 } else if (f->tuner == 1) {
1027 f->type = V4L2_TUNER_RF;
1028 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1029 } else {
1030 ret = -EINVAL;
1031 }
1032
1033 return ret;
1034 }
1035
msi2500_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)1036 static int msi2500_s_frequency(struct file *file, void *priv,
1037 const struct v4l2_frequency *f)
1038 {
1039 struct msi2500_dev *dev = video_drvdata(file);
1040 int ret;
1041
1042 dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
1043 f->tuner, f->type, f->frequency);
1044
1045 if (f->tuner == 0) {
1046 dev->f_adc = clamp_t(unsigned int, f->frequency,
1047 bands[0].rangelow,
1048 bands[0].rangehigh);
1049 dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1050 ret = msi2500_set_usb_adc(dev);
1051 } else if (f->tuner == 1) {
1052 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1053 } else {
1054 ret = -EINVAL;
1055 }
1056
1057 return ret;
1058 }
1059
msi2500_enum_freq_bands(struct file * file,void * priv,struct v4l2_frequency_band * band)1060 static int msi2500_enum_freq_bands(struct file *file, void *priv,
1061 struct v4l2_frequency_band *band)
1062 {
1063 struct msi2500_dev *dev = video_drvdata(file);
1064 int ret;
1065
1066 dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
1067 band->tuner, band->type, band->index);
1068
1069 if (band->tuner == 0) {
1070 if (band->index >= ARRAY_SIZE(bands)) {
1071 ret = -EINVAL;
1072 } else {
1073 *band = bands[band->index];
1074 ret = 0;
1075 }
1076 } else if (band->tuner == 1) {
1077 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner,
1078 enum_freq_bands, band);
1079 } else {
1080 ret = -EINVAL;
1081 }
1082
1083 return ret;
1084 }
1085
1086 static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1087 .vidioc_querycap = msi2500_querycap,
1088
1089 .vidioc_enum_fmt_sdr_cap = msi2500_enum_fmt_sdr_cap,
1090 .vidioc_g_fmt_sdr_cap = msi2500_g_fmt_sdr_cap,
1091 .vidioc_s_fmt_sdr_cap = msi2500_s_fmt_sdr_cap,
1092 .vidioc_try_fmt_sdr_cap = msi2500_try_fmt_sdr_cap,
1093
1094 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1095 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1096 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1097 .vidioc_querybuf = vb2_ioctl_querybuf,
1098 .vidioc_qbuf = vb2_ioctl_qbuf,
1099 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1100
1101 .vidioc_streamon = vb2_ioctl_streamon,
1102 .vidioc_streamoff = vb2_ioctl_streamoff,
1103
1104 .vidioc_g_tuner = msi2500_g_tuner,
1105 .vidioc_s_tuner = msi2500_s_tuner,
1106
1107 .vidioc_g_frequency = msi2500_g_frequency,
1108 .vidioc_s_frequency = msi2500_s_frequency,
1109 .vidioc_enum_freq_bands = msi2500_enum_freq_bands,
1110
1111 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1112 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1113 .vidioc_log_status = v4l2_ctrl_log_status,
1114 };
1115
1116 static const struct v4l2_file_operations msi2500_fops = {
1117 .owner = THIS_MODULE,
1118 .open = v4l2_fh_open,
1119 .release = vb2_fop_release,
1120 .read = vb2_fop_read,
1121 .poll = vb2_fop_poll,
1122 .mmap = vb2_fop_mmap,
1123 .unlocked_ioctl = video_ioctl2,
1124 };
1125
1126 static const struct video_device msi2500_template = {
1127 .name = "Mirics MSi3101 SDR Dongle",
1128 .release = video_device_release_empty,
1129 .fops = &msi2500_fops,
1130 .ioctl_ops = &msi2500_ioctl_ops,
1131 };
1132
msi2500_video_release(struct v4l2_device * v)1133 static void msi2500_video_release(struct v4l2_device *v)
1134 {
1135 struct msi2500_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
1136
1137 v4l2_ctrl_handler_free(&dev->hdl);
1138 v4l2_device_unregister(&dev->v4l2_dev);
1139 kfree(dev);
1140 }
1141
msi2500_transfer_one_message(struct spi_master * master,struct spi_message * m)1142 static int msi2500_transfer_one_message(struct spi_master *master,
1143 struct spi_message *m)
1144 {
1145 struct msi2500_dev *dev = spi_master_get_devdata(master);
1146 struct spi_transfer *t;
1147 int ret = 0;
1148 u32 data;
1149
1150 list_for_each_entry(t, &m->transfers, transfer_list) {
1151 dev_dbg(dev->dev, "msg=%*ph\n", t->len, t->tx_buf);
1152 data = 0x09; /* reg 9 is SPI adapter */
1153 data |= ((u8 *)t->tx_buf)[0] << 8;
1154 data |= ((u8 *)t->tx_buf)[1] << 16;
1155 data |= ((u8 *)t->tx_buf)[2] << 24;
1156 ret = msi2500_ctrl_msg(dev, CMD_WREG, data);
1157 }
1158
1159 m->status = ret;
1160 spi_finalize_current_message(master);
1161 return ret;
1162 }
1163
msi2500_probe(struct usb_interface * intf,const struct usb_device_id * id)1164 static int msi2500_probe(struct usb_interface *intf,
1165 const struct usb_device_id *id)
1166 {
1167 struct msi2500_dev *dev;
1168 struct v4l2_subdev *sd;
1169 struct spi_master *master;
1170 int ret;
1171 static struct spi_board_info board_info = {
1172 .modalias = "msi001",
1173 .bus_num = 0,
1174 .chip_select = 0,
1175 .max_speed_hz = 12000000,
1176 };
1177
1178 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1179 if (!dev) {
1180 ret = -ENOMEM;
1181 goto err;
1182 }
1183
1184 mutex_init(&dev->v4l2_lock);
1185 mutex_init(&dev->vb_queue_lock);
1186 spin_lock_init(&dev->queued_bufs_lock);
1187 INIT_LIST_HEAD(&dev->queued_bufs);
1188 dev->dev = &intf->dev;
1189 dev->udev = interface_to_usbdev(intf);
1190 dev->f_adc = bands[0].rangelow;
1191 dev->pixelformat = formats[0].pixelformat;
1192 dev->buffersize = formats[0].buffersize;
1193 dev->num_formats = NUM_FORMATS;
1194 if (!msi2500_emulated_fmt)
1195 dev->num_formats -= 2;
1196
1197 /* Init videobuf2 queue structure */
1198 dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1199 dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1200 dev->vb_queue.drv_priv = dev;
1201 dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1202 dev->vb_queue.ops = &msi2500_vb2_ops;
1203 dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1204 dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1205 ret = vb2_queue_init(&dev->vb_queue);
1206 if (ret) {
1207 dev_err(dev->dev, "Could not initialize vb2 queue\n");
1208 goto err_free_mem;
1209 }
1210
1211 /* Init video_device structure */
1212 dev->vdev = msi2500_template;
1213 dev->vdev.queue = &dev->vb_queue;
1214 dev->vdev.queue->lock = &dev->vb_queue_lock;
1215 video_set_drvdata(&dev->vdev, dev);
1216
1217 /* Register the v4l2_device structure */
1218 dev->v4l2_dev.release = msi2500_video_release;
1219 ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1220 if (ret) {
1221 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
1222 goto err_free_mem;
1223 }
1224
1225 /* SPI master adapter */
1226 master = spi_alloc_master(dev->dev, 0);
1227 if (master == NULL) {
1228 ret = -ENOMEM;
1229 goto err_unregister_v4l2_dev;
1230 }
1231
1232 dev->master = master;
1233 master->bus_num = -1;
1234 master->num_chipselect = 1;
1235 master->transfer_one_message = msi2500_transfer_one_message;
1236 spi_master_set_devdata(master, dev);
1237 ret = spi_register_master(master);
1238 if (ret) {
1239 spi_master_put(master);
1240 goto err_unregister_v4l2_dev;
1241 }
1242
1243 /* load v4l2 subdevice */
1244 sd = v4l2_spi_new_subdev(&dev->v4l2_dev, master, &board_info);
1245 dev->v4l2_subdev = sd;
1246 if (sd == NULL) {
1247 dev_err(dev->dev, "cannot get v4l2 subdevice\n");
1248 ret = -ENODEV;
1249 goto err_unregister_master;
1250 }
1251
1252 /* Register controls */
1253 v4l2_ctrl_handler_init(&dev->hdl, 0);
1254 if (dev->hdl.error) {
1255 ret = dev->hdl.error;
1256 dev_err(dev->dev, "Could not initialize controls\n");
1257 goto err_free_controls;
1258 }
1259
1260 /* currently all controls are from subdev */
1261 v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL, true);
1262
1263 dev->v4l2_dev.ctrl_handler = &dev->hdl;
1264 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1265 dev->vdev.lock = &dev->v4l2_lock;
1266 dev->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1267 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
1268
1269 ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1270 if (ret) {
1271 dev_err(dev->dev,
1272 "Failed to register as video device (%d)\n", ret);
1273 goto err_unregister_v4l2_dev;
1274 }
1275 dev_info(dev->dev, "Registered as %s\n",
1276 video_device_node_name(&dev->vdev));
1277 dev_notice(dev->dev,
1278 "SDR API is still slightly experimental and functionality changes may follow\n");
1279 return 0;
1280 err_free_controls:
1281 v4l2_ctrl_handler_free(&dev->hdl);
1282 err_unregister_master:
1283 spi_unregister_master(dev->master);
1284 err_unregister_v4l2_dev:
1285 v4l2_device_unregister(&dev->v4l2_dev);
1286 err_free_mem:
1287 kfree(dev);
1288 err:
1289 return ret;
1290 }
1291
1292 /* USB device ID list */
1293 static const struct usb_device_id msi2500_id_table[] = {
1294 {USB_DEVICE(0x1df7, 0x2500)}, /* Mirics MSi3101 SDR Dongle */
1295 {USB_DEVICE(0x2040, 0xd300)}, /* Hauppauge WinTV 133559 LF */
1296 {}
1297 };
1298 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1299
1300 /* USB subsystem interface */
1301 static struct usb_driver msi2500_driver = {
1302 .name = KBUILD_MODNAME,
1303 .probe = msi2500_probe,
1304 .disconnect = msi2500_disconnect,
1305 .id_table = msi2500_id_table,
1306 };
1307
1308 module_usb_driver(msi2500_driver);
1309
1310 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1311 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1312 MODULE_LICENSE("GPL");
1313