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Merge branches 'timers-core-for-linus' and 'timers-urgent-for-linus' of git://git...
[linux/fpc-iii.git] / drivers / media / usb / airspy / airspy.c
blob565a59310747680858bb2bf30543e05becd579a0
1 /*
2 * AirSpy SDR driver
3 *
4 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/usb.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-ioctl.h>
22 #include <media/v4l2-ctrls.h>
23 #include <media/v4l2-event.h>
24 #include <media/videobuf2-v4l2.h>
25 #include <media/videobuf2-vmalloc.h>
26
27 /* AirSpy USB API commands (from AirSpy Library) */
28 enum {
29 CMD_INVALID = 0x00,
30 CMD_RECEIVER_MODE = 0x01,
31 CMD_SI5351C_WRITE = 0x02,
32 CMD_SI5351C_READ = 0x03,
33 CMD_R820T_WRITE = 0x04,
34 CMD_R820T_READ = 0x05,
35 CMD_SPIFLASH_ERASE = 0x06,
36 CMD_SPIFLASH_WRITE = 0x07,
37 CMD_SPIFLASH_READ = 0x08,
38 CMD_BOARD_ID_READ = 0x09,
39 CMD_VERSION_STRING_READ = 0x0a,
40 CMD_BOARD_PARTID_SERIALNO_READ = 0x0b,
41 CMD_SET_SAMPLE_RATE = 0x0c,
42 CMD_SET_FREQ = 0x0d,
43 CMD_SET_LNA_GAIN = 0x0e,
44 CMD_SET_MIXER_GAIN = 0x0f,
45 CMD_SET_VGA_GAIN = 0x10,
46 CMD_SET_LNA_AGC = 0x11,
47 CMD_SET_MIXER_AGC = 0x12,
48 CMD_SET_PACKING = 0x13,
49 };
50
51 /*
52 * bEndpointAddress 0x81 EP 1 IN
53 * Transfer Type Bulk
54 * wMaxPacketSize 0x0200 1x 512 bytes
55 */
56 #define MAX_BULK_BUFS (6)
57 #define BULK_BUFFER_SIZE (128 * 512)
58
59 static const struct v4l2_frequency_band bands[] = {
60 {
61 .tuner = 0,
62 .type = V4L2_TUNER_ADC,
63 .index = 0,
64 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
65 .rangelow = 20000000,
66 .rangehigh = 20000000,
67 },
68 };
69
70 static const struct v4l2_frequency_band bands_rf[] = {
71 {
72 .tuner = 1,
73 .type = V4L2_TUNER_RF,
74 .index = 0,
75 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
76 .rangelow = 24000000,
77 .rangehigh = 1750000000,
78 },
79 };
80
81 /* stream formats */
82 struct airspy_format {
83 char *name;
84 u32 pixelformat;
85 u32 buffersize;
86 };
87
88 /* format descriptions for capture and preview */
89 static struct airspy_format formats[] = {
90 {
91 .name = "Real U12LE",
92 .pixelformat = V4L2_SDR_FMT_RU12LE,
93 .buffersize = BULK_BUFFER_SIZE,
94 },
95 };
96
97 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
98
99 /* intermediate buffers with raw data from the USB device */
100 struct airspy_frame_buf {
101 /* common v4l buffer stuff -- must be first */
102 struct vb2_v4l2_buffer vb;
103 struct list_head list;
104 };
105
106 struct airspy {
107 #define POWER_ON (1 << 1)
108 #define URB_BUF (1 << 2)
109 #define USB_STATE_URB_BUF (1 << 3)
110 unsigned long flags;
111
112 struct device *dev;
113 struct usb_device *udev;
114 struct video_device vdev;
115 struct v4l2_device v4l2_dev;
116
117 /* videobuf2 queue and queued buffers list */
118 struct vb2_queue vb_queue;
119 struct list_head queued_bufs;
120 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
121 unsigned sequence; /* Buffer sequence counter */
122 unsigned int vb_full; /* vb is full and packets dropped */
123
124 /* Note if taking both locks v4l2_lock must always be locked first! */
125 struct mutex v4l2_lock; /* Protects everything else */
126 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
127
128 struct urb *urb_list[MAX_BULK_BUFS];
129 int buf_num;
130 unsigned long buf_size;
131 u8 *buf_list[MAX_BULK_BUFS];
132 dma_addr_t dma_addr[MAX_BULK_BUFS];
133 int urbs_initialized;
134 int urbs_submitted;
135
136 /* USB control message buffer */
137 #define BUF_SIZE 128
138 u8 buf[BUF_SIZE];
139
140 /* Current configuration */
141 unsigned int f_adc;
142 unsigned int f_rf;
143 u32 pixelformat;
144 u32 buffersize;
145
146 /* Controls */
147 struct v4l2_ctrl_handler hdl;
148 struct v4l2_ctrl *lna_gain_auto;
149 struct v4l2_ctrl *lna_gain;
150 struct v4l2_ctrl *mixer_gain_auto;
151 struct v4l2_ctrl *mixer_gain;
152 struct v4l2_ctrl *if_gain;
153
154 /* Sample rate calc */
155 unsigned long jiffies_next;
156 unsigned int sample;
157 unsigned int sample_measured;
158 };
159
160 #define airspy_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
161 char *_direction; \
162 if (_t & USB_DIR_IN) \
163 _direction = "<<<"; \
164 else \
165 _direction = ">>>"; \
166 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
167 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
168 _l & 0xff, _l >> 8, _direction, _l, _b); \
169 }
170
171 /* execute firmware command */
172 static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index,
173 u8 *data, u16 size)
174 {
175 int ret;
176 unsigned int pipe;
177 u8 requesttype;
178
179 switch (request) {
180 case CMD_RECEIVER_MODE:
181 case CMD_SET_FREQ:
182 pipe = usb_sndctrlpipe(s->udev, 0);
183 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
184 break;
185 case CMD_BOARD_ID_READ:
186 case CMD_VERSION_STRING_READ:
187 case CMD_BOARD_PARTID_SERIALNO_READ:
188 case CMD_SET_LNA_GAIN:
189 case CMD_SET_MIXER_GAIN:
190 case CMD_SET_VGA_GAIN:
191 case CMD_SET_LNA_AGC:
192 case CMD_SET_MIXER_AGC:
193 pipe = usb_rcvctrlpipe(s->udev, 0);
194 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
195 break;
196 default:
197 dev_err(s->dev, "Unknown command %02x\n", request);
198 ret = -EINVAL;
199 goto err;
200 }
201
202 /* write request */
203 if (!(requesttype & USB_DIR_IN))
204 memcpy(s->buf, data, size);
205
206 ret = usb_control_msg(s->udev, pipe, request, requesttype, value,
207 index, s->buf, size, 1000);
208 airspy_dbg_usb_control_msg(s->dev, request, requesttype, value,
209 index, s->buf, size);
210 if (ret < 0) {
211 dev_err(s->dev, "usb_control_msg() failed %d request %02x\n",
212 ret, request);
213 goto err;
214 }
215
216 /* read request */
217 if (requesttype & USB_DIR_IN)
218 memcpy(data, s->buf, size);
219
220 return 0;
221 err:
222 return ret;
223 }
224
225 /* Private functions */
226 static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s)
227 {
228 unsigned long flags;
229 struct airspy_frame_buf *buf = NULL;
230
231 spin_lock_irqsave(&s->queued_bufs_lock, flags);
232 if (list_empty(&s->queued_bufs))
233 goto leave;
234
235 buf = list_entry(s->queued_bufs.next,
236 struct airspy_frame_buf, list);
237 list_del(&buf->list);
238 leave:
239 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
240 return buf;
241 }
242
243 static unsigned int airspy_convert_stream(struct airspy *s,
244 void *dst, void *src, unsigned int src_len)
245 {
246 unsigned int dst_len;
247
248 if (s->pixelformat == V4L2_SDR_FMT_RU12LE) {
249 memcpy(dst, src, src_len);
250 dst_len = src_len;
251 } else {
252 dst_len = 0;
253 }
254
255 /* calculate sample rate and output it in 10 seconds intervals */
256 if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
257 #define MSECS 10000UL
258 unsigned int msecs = jiffies_to_msecs(jiffies -
259 s->jiffies_next + msecs_to_jiffies(MSECS));
260 unsigned int samples = s->sample - s->sample_measured;
261
262 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
263 s->sample_measured = s->sample;
264 dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n",
265 src_len, samples, msecs,
266 samples * 1000UL / msecs);
267 }
268
269 /* total number of samples */
270 s->sample += src_len / 2;
271
272 return dst_len;
273 }
274
275 /*
276 * This gets called for the bulk stream pipe. This is done in interrupt
277 * time, so it has to be fast, not crash, and not stall. Neat.
278 */
279 static void airspy_urb_complete(struct urb *urb)
280 {
281 struct airspy *s = urb->context;
282 struct airspy_frame_buf *fbuf;
283
284 dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n",
285 urb->status, urb->actual_length,
286 urb->transfer_buffer_length, urb->error_count);
287
288 switch (urb->status) {
289 case 0: /* success */
290 case -ETIMEDOUT: /* NAK */
291 break;
292 case -ECONNRESET: /* kill */
293 case -ENOENT:
294 case -ESHUTDOWN:
295 return;
296 default: /* error */
297 dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status);
298 break;
299 }
300
301 if (likely(urb->actual_length > 0)) {
302 void *ptr;
303 unsigned int len;
304 /* get free framebuffer */
305 fbuf = airspy_get_next_fill_buf(s);
306 if (unlikely(fbuf == NULL)) {
307 s->vb_full++;
308 dev_notice_ratelimited(s->dev,
309 "videobuf is full, %d packets dropped\n",
310 s->vb_full);
311 goto skip;
312 }
313
314 /* fill framebuffer */
315 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
316 len = airspy_convert_stream(s, ptr, urb->transfer_buffer,
317 urb->actual_length);
318 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
319 v4l2_get_timestamp(&fbuf->vb.timestamp);
320 fbuf->vb.sequence = s->sequence++;
321 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
322 }
323 skip:
324 usb_submit_urb(urb, GFP_ATOMIC);
325 }
326
327 static int airspy_kill_urbs(struct airspy *s)
328 {
329 int i;
330
331 for (i = s->urbs_submitted - 1; i >= 0; i--) {
332 dev_dbg(s->dev, "kill urb=%d\n", i);
333 /* stop the URB */
334 usb_kill_urb(s->urb_list[i]);
335 }
336 s->urbs_submitted = 0;
337
338 return 0;
339 }
340
341 static int airspy_submit_urbs(struct airspy *s)
342 {
343 int i, ret;
344
345 for (i = 0; i < s->urbs_initialized; i++) {
346 dev_dbg(s->dev, "submit urb=%d\n", i);
347 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
348 if (ret) {
349 dev_err(s->dev, "Could not submit URB no. %d - get them all back\n",
350 i);
351 airspy_kill_urbs(s);
352 return ret;
353 }
354 s->urbs_submitted++;
355 }
356
357 return 0;
358 }
359
360 static int airspy_free_stream_bufs(struct airspy *s)
361 {
362 if (s->flags & USB_STATE_URB_BUF) {
363 while (s->buf_num) {
364 s->buf_num--;
365 dev_dbg(s->dev, "free buf=%d\n", s->buf_num);
366 usb_free_coherent(s->udev, s->buf_size,
367 s->buf_list[s->buf_num],
368 s->dma_addr[s->buf_num]);
369 }
370 }
371 s->flags &= ~USB_STATE_URB_BUF;
372
373 return 0;
374 }
375
376 static int airspy_alloc_stream_bufs(struct airspy *s)
377 {
378 s->buf_num = 0;
379 s->buf_size = BULK_BUFFER_SIZE;
380
381 dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n",
382 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
383
384 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
385 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
386 BULK_BUFFER_SIZE, GFP_ATOMIC,
387 &s->dma_addr[s->buf_num]);
388 if (!s->buf_list[s->buf_num]) {
389 dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num);
390 airspy_free_stream_bufs(s);
391 return -ENOMEM;
392 }
393
394 dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num,
395 s->buf_list[s->buf_num],
396 (long long)s->dma_addr[s->buf_num]);
397 s->flags |= USB_STATE_URB_BUF;
398 }
399
400 return 0;
401 }
402
403 static int airspy_free_urbs(struct airspy *s)
404 {
405 int i;
406
407 airspy_kill_urbs(s);
408
409 for (i = s->urbs_initialized - 1; i >= 0; i--) {
410 if (s->urb_list[i]) {
411 dev_dbg(s->dev, "free urb=%d\n", i);
412 /* free the URBs */
413 usb_free_urb(s->urb_list[i]);
414 }
415 }
416 s->urbs_initialized = 0;
417
418 return 0;
419 }
420
421 static int airspy_alloc_urbs(struct airspy *s)
422 {
423 int i, j;
424
425 /* allocate the URBs */
426 for (i = 0; i < MAX_BULK_BUFS; i++) {
427 dev_dbg(s->dev, "alloc urb=%d\n", i);
428 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
429 if (!s->urb_list[i]) {
430 dev_dbg(s->dev, "failed\n");
431 for (j = 0; j < i; j++)
432 usb_free_urb(s->urb_list[j]);
433 return -ENOMEM;
434 }
435 usb_fill_bulk_urb(s->urb_list[i],
436 s->udev,
437 usb_rcvbulkpipe(s->udev, 0x81),
438 s->buf_list[i],
439 BULK_BUFFER_SIZE,
440 airspy_urb_complete, s);
441
442 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
443 s->urb_list[i]->transfer_dma = s->dma_addr[i];
444 s->urbs_initialized++;
445 }
446
447 return 0;
448 }
449
450 /* Must be called with vb_queue_lock hold */
451 static void airspy_cleanup_queued_bufs(struct airspy *s)
452 {
453 unsigned long flags;
454
455 dev_dbg(s->dev, "\n");
456
457 spin_lock_irqsave(&s->queued_bufs_lock, flags);
458 while (!list_empty(&s->queued_bufs)) {
459 struct airspy_frame_buf *buf;
460
461 buf = list_entry(s->queued_bufs.next,
462 struct airspy_frame_buf, list);
463 list_del(&buf->list);
464 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
465 }
466 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
467 }
468
469 /* The user yanked out the cable... */
470 static void airspy_disconnect(struct usb_interface *intf)
471 {
472 struct v4l2_device *v = usb_get_intfdata(intf);
473 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
474
475 dev_dbg(s->dev, "\n");
476
477 mutex_lock(&s->vb_queue_lock);
478 mutex_lock(&s->v4l2_lock);
479 /* No need to keep the urbs around after disconnection */
480 s->udev = NULL;
481 v4l2_device_disconnect(&s->v4l2_dev);
482 video_unregister_device(&s->vdev);
483 mutex_unlock(&s->v4l2_lock);
484 mutex_unlock(&s->vb_queue_lock);
485
486 v4l2_device_put(&s->v4l2_dev);
487 }
488
489 /* Videobuf2 operations */
490 static int airspy_queue_setup(struct vb2_queue *vq,
491 const void *parg, unsigned int *nbuffers,
492 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
493 {
494 struct airspy *s = vb2_get_drv_priv(vq);
495
496 dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers);
497
498 /* Need at least 8 buffers */
499 if (vq->num_buffers + *nbuffers < 8)
500 *nbuffers = 8 - vq->num_buffers;
501 *nplanes = 1;
502 sizes[0] = PAGE_ALIGN(s->buffersize);
503
504 dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
505 return 0;
506 }
507
508 static void airspy_buf_queue(struct vb2_buffer *vb)
509 {
510 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
511 struct airspy *s = vb2_get_drv_priv(vb->vb2_queue);
512 struct airspy_frame_buf *buf =
513 container_of(vbuf, struct airspy_frame_buf, vb);
514 unsigned long flags;
515
516 /* Check the device has not disconnected between prep and queuing */
517 if (unlikely(!s->udev)) {
518 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
519 return;
520 }
521
522 spin_lock_irqsave(&s->queued_bufs_lock, flags);
523 list_add_tail(&buf->list, &s->queued_bufs);
524 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
525 }
526
527 static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count)
528 {
529 struct airspy *s = vb2_get_drv_priv(vq);
530 int ret;
531
532 dev_dbg(s->dev, "\n");
533
534 if (!s->udev)
535 return -ENODEV;
536
537 mutex_lock(&s->v4l2_lock);
538
539 s->sequence = 0;
540
541 set_bit(POWER_ON, &s->flags);
542
543 ret = airspy_alloc_stream_bufs(s);
544 if (ret)
545 goto err_clear_bit;
546
547 ret = airspy_alloc_urbs(s);
548 if (ret)
549 goto err_free_stream_bufs;
550
551 ret = airspy_submit_urbs(s);
552 if (ret)
553 goto err_free_urbs;
554
555 /* start hardware streaming */
556 ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0);
557 if (ret)
558 goto err_kill_urbs;
559
560 goto exit_mutex_unlock;
561
562 err_kill_urbs:
563 airspy_kill_urbs(s);
564 err_free_urbs:
565 airspy_free_urbs(s);
566 err_free_stream_bufs:
567 airspy_free_stream_bufs(s);
568 err_clear_bit:
569 clear_bit(POWER_ON, &s->flags);
570
571 /* return all queued buffers to vb2 */
572 {
573 struct airspy_frame_buf *buf, *tmp;
574
575 list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) {
576 list_del(&buf->list);
577 vb2_buffer_done(&buf->vb.vb2_buf,
578 VB2_BUF_STATE_QUEUED);
579 }
580 }
581
582 exit_mutex_unlock:
583 mutex_unlock(&s->v4l2_lock);
584
585 return ret;
586 }
587
588 static void airspy_stop_streaming(struct vb2_queue *vq)
589 {
590 struct airspy *s = vb2_get_drv_priv(vq);
591
592 dev_dbg(s->dev, "\n");
593
594 mutex_lock(&s->v4l2_lock);
595
596 /* stop hardware streaming */
597 airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0);
598
599 airspy_kill_urbs(s);
600 airspy_free_urbs(s);
601 airspy_free_stream_bufs(s);
602
603 airspy_cleanup_queued_bufs(s);
604
605 clear_bit(POWER_ON, &s->flags);
606
607 mutex_unlock(&s->v4l2_lock);
608 }
609
610 static struct vb2_ops airspy_vb2_ops = {
611 .queue_setup = airspy_queue_setup,
612 .buf_queue = airspy_buf_queue,
613 .start_streaming = airspy_start_streaming,
614 .stop_streaming = airspy_stop_streaming,
615 .wait_prepare = vb2_ops_wait_prepare,
616 .wait_finish = vb2_ops_wait_finish,
617 };
618
619 static int airspy_querycap(struct file *file, void *fh,
620 struct v4l2_capability *cap)
621 {
622 struct airspy *s = video_drvdata(file);
623
624 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
625 strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
626 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
627 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
628 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
629 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
630
631 return 0;
632 }
633
634 static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv,
635 struct v4l2_fmtdesc *f)
636 {
637 if (f->index >= NUM_FORMATS)
638 return -EINVAL;
639
640 strlcpy(f->description, formats[f->index].name, sizeof(f->description));
641 f->pixelformat = formats[f->index].pixelformat;
642
643 return 0;
644 }
645
646 static int airspy_g_fmt_sdr_cap(struct file *file, void *priv,
647 struct v4l2_format *f)
648 {
649 struct airspy *s = video_drvdata(file);
650
651 f->fmt.sdr.pixelformat = s->pixelformat;
652 f->fmt.sdr.buffersize = s->buffersize;
653 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
654
655 return 0;
656 }
657
658 static int airspy_s_fmt_sdr_cap(struct file *file, void *priv,
659 struct v4l2_format *f)
660 {
661 struct airspy *s = video_drvdata(file);
662 struct vb2_queue *q = &s->vb_queue;
663 int i;
664
665 if (vb2_is_busy(q))
666 return -EBUSY;
667
668 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
669 for (i = 0; i < NUM_FORMATS; i++) {
670 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
671 s->pixelformat = formats[i].pixelformat;
672 s->buffersize = formats[i].buffersize;
673 f->fmt.sdr.buffersize = formats[i].buffersize;
674 return 0;
675 }
676 }
677
678 s->pixelformat = formats[0].pixelformat;
679 s->buffersize = formats[0].buffersize;
680 f->fmt.sdr.pixelformat = formats[0].pixelformat;
681 f->fmt.sdr.buffersize = formats[0].buffersize;
682
683 return 0;
684 }
685
686 static int airspy_try_fmt_sdr_cap(struct file *file, void *priv,
687 struct v4l2_format *f)
688 {
689 int i;
690
691 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
692 for (i = 0; i < NUM_FORMATS; i++) {
693 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
694 f->fmt.sdr.buffersize = formats[i].buffersize;
695 return 0;
696 }
697 }
698
699 f->fmt.sdr.pixelformat = formats[0].pixelformat;
700 f->fmt.sdr.buffersize = formats[0].buffersize;
701
702 return 0;
703 }
704
705 static int airspy_s_tuner(struct file *file, void *priv,
706 const struct v4l2_tuner *v)
707 {
708 int ret;
709
710 if (v->index == 0)
711 ret = 0;
712 else if (v->index == 1)
713 ret = 0;
714 else
715 ret = -EINVAL;
716
717 return ret;
718 }
719
720 static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
721 {
722 int ret;
723
724 if (v->index == 0) {
725 strlcpy(v->name, "AirSpy ADC", sizeof(v->name));
726 v->type = V4L2_TUNER_ADC;
727 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
728 v->rangelow = bands[0].rangelow;
729 v->rangehigh = bands[0].rangehigh;
730 ret = 0;
731 } else if (v->index == 1) {
732 strlcpy(v->name, "AirSpy RF", sizeof(v->name));
733 v->type = V4L2_TUNER_RF;
734 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
735 v->rangelow = bands_rf[0].rangelow;
736 v->rangehigh = bands_rf[0].rangehigh;
737 ret = 0;
738 } else {
739 ret = -EINVAL;
740 }
741
742 return ret;
743 }
744
745 static int airspy_g_frequency(struct file *file, void *priv,
746 struct v4l2_frequency *f)
747 {
748 struct airspy *s = video_drvdata(file);
749 int ret;
750
751 if (f->tuner == 0) {
752 f->type = V4L2_TUNER_ADC;
753 f->frequency = s->f_adc;
754 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
755 ret = 0;
756 } else if (f->tuner == 1) {
757 f->type = V4L2_TUNER_RF;
758 f->frequency = s->f_rf;
759 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
760 ret = 0;
761 } else {
762 ret = -EINVAL;
763 }
764
765 return ret;
766 }
767
768 static int airspy_s_frequency(struct file *file, void *priv,
769 const struct v4l2_frequency *f)
770 {
771 struct airspy *s = video_drvdata(file);
772 int ret;
773 u8 buf[4];
774
775 if (f->tuner == 0) {
776 s->f_adc = clamp_t(unsigned int, f->frequency,
777 bands[0].rangelow,
778 bands[0].rangehigh);
779 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
780 ret = 0;
781 } else if (f->tuner == 1) {
782 s->f_rf = clamp_t(unsigned int, f->frequency,
783 bands_rf[0].rangelow,
784 bands_rf[0].rangehigh);
785 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
786 buf[0] = (s->f_rf >> 0) & 0xff;
787 buf[1] = (s->f_rf >> 8) & 0xff;
788 buf[2] = (s->f_rf >> 16) & 0xff;
789 buf[3] = (s->f_rf >> 24) & 0xff;
790 ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4);
791 } else {
792 ret = -EINVAL;
793 }
794
795 return ret;
796 }
797
798 static int airspy_enum_freq_bands(struct file *file, void *priv,
799 struct v4l2_frequency_band *band)
800 {
801 int ret;
802
803 if (band->tuner == 0) {
804 if (band->index >= ARRAY_SIZE(bands)) {
805 ret = -EINVAL;
806 } else {
807 *band = bands[band->index];
808 ret = 0;
809 }
810 } else if (band->tuner == 1) {
811 if (band->index >= ARRAY_SIZE(bands_rf)) {
812 ret = -EINVAL;
813 } else {
814 *band = bands_rf[band->index];
815 ret = 0;
816 }
817 } else {
818 ret = -EINVAL;
819 }
820
821 return ret;
822 }
823
824 static const struct v4l2_ioctl_ops airspy_ioctl_ops = {
825 .vidioc_querycap = airspy_querycap,
826
827 .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap,
828 .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap,
829 .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap,
830 .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap,
831
832 .vidioc_reqbufs = vb2_ioctl_reqbufs,
833 .vidioc_create_bufs = vb2_ioctl_create_bufs,
834 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
835 .vidioc_querybuf = vb2_ioctl_querybuf,
836 .vidioc_qbuf = vb2_ioctl_qbuf,
837 .vidioc_dqbuf = vb2_ioctl_dqbuf,
838
839 .vidioc_streamon = vb2_ioctl_streamon,
840 .vidioc_streamoff = vb2_ioctl_streamoff,
841
842 .vidioc_g_tuner = airspy_g_tuner,
843 .vidioc_s_tuner = airspy_s_tuner,
844
845 .vidioc_g_frequency = airspy_g_frequency,
846 .vidioc_s_frequency = airspy_s_frequency,
847 .vidioc_enum_freq_bands = airspy_enum_freq_bands,
848
849 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
850 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
851 .vidioc_log_status = v4l2_ctrl_log_status,
852 };
853
854 static const struct v4l2_file_operations airspy_fops = {
855 .owner = THIS_MODULE,
856 .open = v4l2_fh_open,
857 .release = vb2_fop_release,
858 .read = vb2_fop_read,
859 .poll = vb2_fop_poll,
860 .mmap = vb2_fop_mmap,
861 .unlocked_ioctl = video_ioctl2,
862 };
863
864 static struct video_device airspy_template = {
865 .name = "AirSpy SDR",
866 .release = video_device_release_empty,
867 .fops = &airspy_fops,
868 .ioctl_ops = &airspy_ioctl_ops,
869 };
870
871 static void airspy_video_release(struct v4l2_device *v)
872 {
873 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
874
875 v4l2_ctrl_handler_free(&s->hdl);
876 v4l2_device_unregister(&s->v4l2_dev);
877 kfree(s);
878 }
879
880 static int airspy_set_lna_gain(struct airspy *s)
881 {
882 int ret;
883 u8 u8tmp;
884
885 dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n",
886 s->lna_gain_auto->cur.val, s->lna_gain_auto->val,
887 s->lna_gain->cur.val, s->lna_gain->val);
888
889 ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val,
890 &u8tmp, 1);
891 if (ret)
892 goto err;
893
894 if (s->lna_gain_auto->val == false) {
895 ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val,
896 &u8tmp, 1);
897 if (ret)
898 goto err;
899 }
900 err:
901 if (ret)
902 dev_dbg(s->dev, "failed=%d\n", ret);
903
904 return ret;
905 }
906
907 static int airspy_set_mixer_gain(struct airspy *s)
908 {
909 int ret;
910 u8 u8tmp;
911
912 dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n",
913 s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val,
914 s->mixer_gain->cur.val, s->mixer_gain->val);
915
916 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val,
917 &u8tmp, 1);
918 if (ret)
919 goto err;
920
921 if (s->mixer_gain_auto->val == false) {
922 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0,
923 s->mixer_gain->val, &u8tmp, 1);
924 if (ret)
925 goto err;
926 }
927 err:
928 if (ret)
929 dev_dbg(s->dev, "failed=%d\n", ret);
930
931 return ret;
932 }
933
934 static int airspy_set_if_gain(struct airspy *s)
935 {
936 int ret;
937 u8 u8tmp;
938
939 dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val);
940
941 ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val,
942 &u8tmp, 1);
943 if (ret)
944 dev_dbg(s->dev, "failed=%d\n", ret);
945
946 return ret;
947 }
948
949 static int airspy_s_ctrl(struct v4l2_ctrl *ctrl)
950 {
951 struct airspy *s = container_of(ctrl->handler, struct airspy, hdl);
952 int ret;
953
954 switch (ctrl->id) {
955 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
956 case V4L2_CID_RF_TUNER_LNA_GAIN:
957 ret = airspy_set_lna_gain(s);
958 break;
959 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
960 case V4L2_CID_RF_TUNER_MIXER_GAIN:
961 ret = airspy_set_mixer_gain(s);
962 break;
963 case V4L2_CID_RF_TUNER_IF_GAIN:
964 ret = airspy_set_if_gain(s);
965 break;
966 default:
967 dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n",
968 ctrl->id, ctrl->name);
969 ret = -EINVAL;
970 }
971
972 return ret;
973 }
974
975 static const struct v4l2_ctrl_ops airspy_ctrl_ops = {
976 .s_ctrl = airspy_s_ctrl,
977 };
978
979 static int airspy_probe(struct usb_interface *intf,
980 const struct usb_device_id *id)
981 {
982 struct airspy *s;
983 int ret;
984 u8 u8tmp, buf[BUF_SIZE];
985
986 s = kzalloc(sizeof(struct airspy), GFP_KERNEL);
987 if (s == NULL) {
988 dev_err(&intf->dev, "Could not allocate memory for state\n");
989 return -ENOMEM;
990 }
991
992 mutex_init(&s->v4l2_lock);
993 mutex_init(&s->vb_queue_lock);
994 spin_lock_init(&s->queued_bufs_lock);
995 INIT_LIST_HEAD(&s->queued_bufs);
996 s->dev = &intf->dev;
997 s->udev = interface_to_usbdev(intf);
998 s->f_adc = bands[0].rangelow;
999 s->f_rf = bands_rf[0].rangelow;
1000 s->pixelformat = formats[0].pixelformat;
1001 s->buffersize = formats[0].buffersize;
1002
1003 /* Detect device */
1004 ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
1005 if (ret == 0)
1006 ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0,
1007 buf, BUF_SIZE);
1008 if (ret) {
1009 dev_err(s->dev, "Could not detect board\n");
1010 goto err_free_mem;
1011 }
1012
1013 buf[BUF_SIZE - 1] = '\0';
1014
1015 dev_info(s->dev, "Board ID: %02x\n", u8tmp);
1016 dev_info(s->dev, "Firmware version: %s\n", buf);
1017
1018 /* Init videobuf2 queue structure */
1019 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1020 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1021 s->vb_queue.drv_priv = s;
1022 s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf);
1023 s->vb_queue.ops = &airspy_vb2_ops;
1024 s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1025 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1026 ret = vb2_queue_init(&s->vb_queue);
1027 if (ret) {
1028 dev_err(s->dev, "Could not initialize vb2 queue\n");
1029 goto err_free_mem;
1030 }
1031
1032 /* Init video_device structure */
1033 s->vdev = airspy_template;
1034 s->vdev.queue = &s->vb_queue;
1035 s->vdev.queue->lock = &s->vb_queue_lock;
1036 video_set_drvdata(&s->vdev, s);
1037
1038 /* Register the v4l2_device structure */
1039 s->v4l2_dev.release = airspy_video_release;
1040 ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
1041 if (ret) {
1042 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret);
1043 goto err_free_mem;
1044 }
1045
1046 /* Register controls */
1047 v4l2_ctrl_handler_init(&s->hdl, 5);
1048 s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1049 V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0);
1050 s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1051 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8);
1052 v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
1053 s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1054 V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0);
1055 s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1056 V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8);
1057 v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
1058 s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1059 V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0);
1060 if (s->hdl.error) {
1061 ret = s->hdl.error;
1062 dev_err(s->dev, "Could not initialize controls\n");
1063 goto err_free_controls;
1064 }
1065
1066 v4l2_ctrl_handler_setup(&s->hdl);
1067
1068 s->v4l2_dev.ctrl_handler = &s->hdl;
1069 s->vdev.v4l2_dev = &s->v4l2_dev;
1070 s->vdev.lock = &s->v4l2_lock;
1071
1072 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1073 if (ret) {
1074 dev_err(s->dev, "Failed to register as video device (%d)\n",
1075 ret);
1076 goto err_unregister_v4l2_dev;
1077 }
1078 dev_info(s->dev, "Registered as %s\n",
1079 video_device_node_name(&s->vdev));
1080 dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n");
1081 return 0;
1082
1083 err_free_controls:
1084 v4l2_ctrl_handler_free(&s->hdl);
1085 err_unregister_v4l2_dev:
1086 v4l2_device_unregister(&s->v4l2_dev);
1087 err_free_mem:
1088 kfree(s);
1089 return ret;
1090 }
1091
1092 /* USB device ID list */
1093 static struct usb_device_id airspy_id_table[] = {
1094 { USB_DEVICE(0x1d50, 0x60a1) }, /* AirSpy */
1095 { }
1096 };
1097 MODULE_DEVICE_TABLE(usb, airspy_id_table);
1098
1099 /* USB subsystem interface */
1100 static struct usb_driver airspy_driver = {
1101 .name = KBUILD_MODNAME,
1102 .probe = airspy_probe,
1103 .disconnect = airspy_disconnect,
1104 .id_table = airspy_id_table,
1105 };
1106
1107 module_usb_driver(airspy_driver);
1108
1109 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1110 MODULE_DESCRIPTION("AirSpy SDR");
1111 MODULE_LICENSE("GPL");
Linux with added FPC-III support