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