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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-vmalloc.h>
25
26
27enum {
28 CMD_INVALID = 0x00,
29 CMD_RECEIVER_MODE = 0x01,
30 CMD_SI5351C_WRITE = 0x02,
31 CMD_SI5351C_READ = 0x03,
32 CMD_R820T_WRITE = 0x04,
33 CMD_R820T_READ = 0x05,
34 CMD_SPIFLASH_ERASE = 0x06,
35 CMD_SPIFLASH_WRITE = 0x07,
36 CMD_SPIFLASH_READ = 0x08,
37 CMD_BOARD_ID_READ = 0x09,
38 CMD_VERSION_STRING_READ = 0x0a,
39 CMD_BOARD_PARTID_SERIALNO_READ = 0x0b,
40 CMD_SET_SAMPLE_RATE = 0x0c,
41 CMD_SET_FREQ = 0x0d,
42 CMD_SET_LNA_GAIN = 0x0e,
43 CMD_SET_MIXER_GAIN = 0x0f,
44 CMD_SET_VGA_GAIN = 0x10,
45 CMD_SET_LNA_AGC = 0x11,
46 CMD_SET_MIXER_AGC = 0x12,
47 CMD_SET_PACKING = 0x13,
48};
49
50
51
52
53
54
55#define MAX_BULK_BUFS (6)
56#define BULK_BUFFER_SIZE (128 * 512)
57
58static const struct v4l2_frequency_band bands[] = {
59 {
60 .tuner = 0,
61 .type = V4L2_TUNER_ADC,
62 .index = 0,
63 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
64 .rangelow = 20000000,
65 .rangehigh = 20000000,
66 },
67};
68
69static const struct v4l2_frequency_band bands_rf[] = {
70 {
71 .tuner = 1,
72 .type = V4L2_TUNER_RF,
73 .index = 0,
74 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
75 .rangelow = 24000000,
76 .rangehigh = 1750000000,
77 },
78};
79
80
81struct airspy_format {
82 char *name;
83 u32 pixelformat;
84 u32 buffersize;
85};
86
87
88static struct airspy_format formats[] = {
89 {
90 .name = "Real U12LE",
91 .pixelformat = V4L2_SDR_FMT_RU12LE,
92 .buffersize = BULK_BUFFER_SIZE,
93 },
94};
95
96static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
97
98
99struct airspy_frame_buf {
100 struct vb2_buffer vb;
101 struct list_head list;
102};
103
104struct airspy {
105#define POWER_ON (1 << 1)
106#define URB_BUF (1 << 2)
107#define USB_STATE_URB_BUF (1 << 3)
108 unsigned long flags;
109
110 struct device *dev;
111 struct usb_device *udev;
112 struct video_device vdev;
113 struct v4l2_device v4l2_dev;
114
115
116 struct vb2_queue vb_queue;
117 struct list_head queued_bufs;
118 spinlock_t queued_bufs_lock;
119 unsigned sequence;
120 unsigned int vb_full;
121
122
123 struct mutex v4l2_lock;
124 struct mutex vb_queue_lock;
125
126 struct urb *urb_list[MAX_BULK_BUFS];
127 int buf_num;
128 unsigned long buf_size;
129 u8 *buf_list[MAX_BULK_BUFS];
130 dma_addr_t dma_addr[MAX_BULK_BUFS];
131 int urbs_initialized;
132 int urbs_submitted;
133
134
135 #define BUF_SIZE 24
136 u8 buf[BUF_SIZE];
137
138
139 unsigned int f_adc;
140 unsigned int f_rf;
141 u32 pixelformat;
142 u32 buffersize;
143
144
145 struct v4l2_ctrl_handler hdl;
146 struct v4l2_ctrl *lna_gain_auto;
147 struct v4l2_ctrl *lna_gain;
148 struct v4l2_ctrl *mixer_gain_auto;
149 struct v4l2_ctrl *mixer_gain;
150 struct v4l2_ctrl *if_gain;
151
152
153 unsigned long jiffies_next;
154 unsigned int sample;
155 unsigned int sample_measured;
156};
157
158#define airspy_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
159 char *_direction; \
160 if (_t & USB_DIR_IN) \
161 _direction = "<<<"; \
162 else \
163 _direction = ">>>"; \
164 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
165 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
166 _l & 0xff, _l >> 8, _direction, _l, _b); \
167}
168
169
170static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index,
171 u8 *data, u16 size)
172{
173 int ret;
174 unsigned int pipe;
175 u8 requesttype;
176
177 switch (request) {
178 case CMD_RECEIVER_MODE:
179 case CMD_SET_FREQ:
180 pipe = usb_sndctrlpipe(s->udev, 0);
181 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
182 break;
183 case CMD_BOARD_ID_READ:
184 case CMD_VERSION_STRING_READ:
185 case CMD_BOARD_PARTID_SERIALNO_READ:
186 case CMD_SET_LNA_GAIN:
187 case CMD_SET_MIXER_GAIN:
188 case CMD_SET_VGA_GAIN:
189 case CMD_SET_LNA_AGC:
190 case CMD_SET_MIXER_AGC:
191 pipe = usb_rcvctrlpipe(s->udev, 0);
192 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
193 break;
194 default:
195 dev_err(s->dev, "Unknown command %02x\n", request);
196 ret = -EINVAL;
197 goto err;
198 }
199
200
201 if (!(requesttype & USB_DIR_IN))
202 memcpy(s->buf, data, size);
203
204 ret = usb_control_msg(s->udev, pipe, request, requesttype, value,
205 index, s->buf, size, 1000);
206 airspy_dbg_usb_control_msg(s->dev, request, requesttype, value,
207 index, s->buf, size);
208 if (ret < 0) {
209 dev_err(s->dev, "usb_control_msg() failed %d request %02x\n",
210 ret, request);
211 goto err;
212 }
213
214
215 if (requesttype & USB_DIR_IN)
216 memcpy(data, s->buf, size);
217
218 return 0;
219err:
220 return ret;
221}
222
223
224static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s)
225{
226 unsigned long flags;
227 struct airspy_frame_buf *buf = NULL;
228
229 spin_lock_irqsave(&s->queued_bufs_lock, flags);
230 if (list_empty(&s->queued_bufs))
231 goto leave;
232
233 buf = list_entry(s->queued_bufs.next,
234 struct airspy_frame_buf, list);
235 list_del(&buf->list);
236leave:
237 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
238 return buf;
239}
240
241static unsigned int airspy_convert_stream(struct airspy *s,
242 void *dst, void *src, unsigned int src_len)
243{
244 unsigned int dst_len;
245
246 if (s->pixelformat == V4L2_SDR_FMT_RU12LE) {
247 memcpy(dst, src, src_len);
248 dst_len = src_len;
249 } else {
250 dst_len = 0;
251 }
252
253
254 if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
255 #define MSECS 10000UL
256 unsigned int msecs = jiffies_to_msecs(jiffies -
257 s->jiffies_next + msecs_to_jiffies(MSECS));
258 unsigned int samples = s->sample - s->sample_measured;
259
260 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
261 s->sample_measured = s->sample;
262 dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n",
263 src_len, samples, msecs,
264 samples * 1000UL / msecs);
265 }
266
267
268 s->sample += src_len / 2;
269
270 return dst_len;
271}
272
273
274
275
276
277static void airspy_urb_complete(struct urb *urb)
278{
279 struct airspy *s = urb->context;
280 struct airspy_frame_buf *fbuf;
281
282 dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n",
283 urb->status, urb->actual_length,
284 urb->transfer_buffer_length, urb->error_count);
285
286 switch (urb->status) {
287 case 0:
288 case -ETIMEDOUT:
289 break;
290 case -ECONNRESET:
291 case -ENOENT:
292 case -ESHUTDOWN:
293 return;
294 default:
295 dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status);
296 break;
297 }
298
299 if (likely(urb->actual_length > 0)) {
300 void *ptr;
301 unsigned int len;
302
303 fbuf = airspy_get_next_fill_buf(s);
304 if (unlikely(fbuf == NULL)) {
305 s->vb_full++;
306 dev_notice_ratelimited(s->dev,
307 "videobuf is full, %d packets dropped\n",
308 s->vb_full);
309 goto skip;
310 }
311
312
313 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
314 len = airspy_convert_stream(s, ptr, urb->transfer_buffer,
315 urb->actual_length);
316 vb2_set_plane_payload(&fbuf->vb, 0, len);
317 v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
318 fbuf->vb.v4l2_buf.sequence = s->sequence++;
319 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
320 }
321skip:
322 usb_submit_urb(urb, GFP_ATOMIC);
323}
324
325static int airspy_kill_urbs(struct airspy *s)
326{
327 int i;
328
329 for (i = s->urbs_submitted - 1; i >= 0; i--) {
330 dev_dbg(s->dev, "kill urb=%d\n", i);
331
332 usb_kill_urb(s->urb_list[i]);
333 }
334 s->urbs_submitted = 0;
335
336 return 0;
337}
338
339static int airspy_submit_urbs(struct airspy *s)
340{
341 int i, ret;
342
343 for (i = 0; i < s->urbs_initialized; i++) {
344 dev_dbg(s->dev, "submit urb=%d\n", i);
345 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
346 if (ret) {
347 dev_err(s->dev, "Could not submit URB no. %d - get them all back\n",
348 i);
349 airspy_kill_urbs(s);
350 return ret;
351 }
352 s->urbs_submitted++;
353 }
354
355 return 0;
356}
357
358static int airspy_free_stream_bufs(struct airspy *s)
359{
360 if (s->flags & USB_STATE_URB_BUF) {
361 while (s->buf_num) {
362 s->buf_num--;
363 dev_dbg(s->dev, "free buf=%d\n", s->buf_num);
364 usb_free_coherent(s->udev, s->buf_size,
365 s->buf_list[s->buf_num],
366 s->dma_addr[s->buf_num]);
367 }
368 }
369 s->flags &= ~USB_STATE_URB_BUF;
370
371 return 0;
372}
373
374static int airspy_alloc_stream_bufs(struct airspy *s)
375{
376 s->buf_num = 0;
377 s->buf_size = BULK_BUFFER_SIZE;
378
379 dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n",
380 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
381
382 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
383 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
384 BULK_BUFFER_SIZE, GFP_ATOMIC,
385 &s->dma_addr[s->buf_num]);
386 if (!s->buf_list[s->buf_num]) {
387 dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num);
388 airspy_free_stream_bufs(s);
389 return -ENOMEM;
390 }
391
392 dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num,
393 s->buf_list[s->buf_num],
394 (long long)s->dma_addr[s->buf_num]);
395 s->flags |= USB_STATE_URB_BUF;
396 }
397
398 return 0;
399}
400
401static int airspy_free_urbs(struct airspy *s)
402{
403 int i;
404
405 airspy_kill_urbs(s);
406
407 for (i = s->urbs_initialized - 1; i >= 0; i--) {
408 if (s->urb_list[i]) {
409 dev_dbg(s->dev, "free urb=%d\n", i);
410
411 usb_free_urb(s->urb_list[i]);
412 }
413 }
414 s->urbs_initialized = 0;
415
416 return 0;
417}
418
419static int airspy_alloc_urbs(struct airspy *s)
420{
421 int i, j;
422
423
424 for (i = 0; i < MAX_BULK_BUFS; i++) {
425 dev_dbg(s->dev, "alloc urb=%d\n", i);
426 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
427 if (!s->urb_list[i]) {
428 dev_dbg(s->dev, "failed\n");
429 for (j = 0; j < i; j++)
430 usb_free_urb(s->urb_list[j]);
431 return -ENOMEM;
432 }
433 usb_fill_bulk_urb(s->urb_list[i],
434 s->udev,
435 usb_rcvbulkpipe(s->udev, 0x81),
436 s->buf_list[i],
437 BULK_BUFFER_SIZE,
438 airspy_urb_complete, s);
439
440 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
441 s->urb_list[i]->transfer_dma = s->dma_addr[i];
442 s->urbs_initialized++;
443 }
444
445 return 0;
446}
447
448
449static void airspy_cleanup_queued_bufs(struct airspy *s)
450{
451 unsigned long flags;
452
453 dev_dbg(s->dev, "\n");
454
455 spin_lock_irqsave(&s->queued_bufs_lock, flags);
456 while (!list_empty(&s->queued_bufs)) {
457 struct airspy_frame_buf *buf;
458
459 buf = list_entry(s->queued_bufs.next,
460 struct airspy_frame_buf, list);
461 list_del(&buf->list);
462 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
463 }
464 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
465}
466
467
468static void airspy_disconnect(struct usb_interface *intf)
469{
470 struct v4l2_device *v = usb_get_intfdata(intf);
471 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
472
473 dev_dbg(s->dev, "\n");
474
475 mutex_lock(&s->vb_queue_lock);
476 mutex_lock(&s->v4l2_lock);
477
478 s->udev = NULL;
479 v4l2_device_disconnect(&s->v4l2_dev);
480 video_unregister_device(&s->vdev);
481 mutex_unlock(&s->v4l2_lock);
482 mutex_unlock(&s->vb_queue_lock);
483
484 v4l2_device_put(&s->v4l2_dev);
485}
486
487
488static int airspy_queue_setup(struct vb2_queue *vq,
489 const struct v4l2_format *fmt, unsigned int *nbuffers,
490 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
491{
492 struct airspy *s = vb2_get_drv_priv(vq);
493
494 dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers);
495
496
497 if (vq->num_buffers + *nbuffers < 8)
498 *nbuffers = 8 - vq->num_buffers;
499 *nplanes = 1;
500 sizes[0] = PAGE_ALIGN(s->buffersize);
501
502 dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
503 return 0;
504}
505
506static void airspy_buf_queue(struct vb2_buffer *vb)
507{
508 struct airspy *s = vb2_get_drv_priv(vb->vb2_queue);
509 struct airspy_frame_buf *buf =
510 container_of(vb, struct airspy_frame_buf, vb);
511 unsigned long flags;
512
513
514 if (unlikely(!s->udev)) {
515 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
516 return;
517 }
518
519 spin_lock_irqsave(&s->queued_bufs_lock, flags);
520 list_add_tail(&buf->list, &s->queued_bufs);
521 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
522}
523
524static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count)
525{
526 struct airspy *s = vb2_get_drv_priv(vq);
527 int ret;
528
529 dev_dbg(s->dev, "\n");
530
531 if (!s->udev)
532 return -ENODEV;
533
534 mutex_lock(&s->v4l2_lock);
535
536 s->sequence = 0;
537
538 set_bit(POWER_ON, &s->flags);
539
540 ret = airspy_alloc_stream_bufs(s);
541 if (ret)
542 goto err_clear_bit;
543
544 ret = airspy_alloc_urbs(s);
545 if (ret)
546 goto err_free_stream_bufs;
547
548 ret = airspy_submit_urbs(s);
549 if (ret)
550 goto err_free_urbs;
551
552
553 ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0);
554 if (ret)
555 goto err_kill_urbs;
556
557 goto exit_mutex_unlock;
558
559err_kill_urbs:
560 airspy_kill_urbs(s);
561err_free_urbs:
562 airspy_free_urbs(s);
563err_free_stream_bufs:
564 airspy_free_stream_bufs(s);
565err_clear_bit:
566 clear_bit(POWER_ON, &s->flags);
567
568
569 {
570 struct airspy_frame_buf *buf, *tmp;
571
572 list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) {
573 list_del(&buf->list);
574 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
575 }
576 }
577
578exit_mutex_unlock:
579 mutex_unlock(&s->v4l2_lock);
580
581 return ret;
582}
583
584static void airspy_stop_streaming(struct vb2_queue *vq)
585{
586 struct airspy *s = vb2_get_drv_priv(vq);
587
588 dev_dbg(s->dev, "\n");
589
590 mutex_lock(&s->v4l2_lock);
591
592
593 airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0);
594
595 airspy_kill_urbs(s);
596 airspy_free_urbs(s);
597 airspy_free_stream_bufs(s);
598
599 airspy_cleanup_queued_bufs(s);
600
601 clear_bit(POWER_ON, &s->flags);
602
603 mutex_unlock(&s->v4l2_lock);
604}
605
606static struct vb2_ops airspy_vb2_ops = {
607 .queue_setup = airspy_queue_setup,
608 .buf_queue = airspy_buf_queue,
609 .start_streaming = airspy_start_streaming,
610 .stop_streaming = airspy_stop_streaming,
611 .wait_prepare = vb2_ops_wait_prepare,
612 .wait_finish = vb2_ops_wait_finish,
613};
614
615static int airspy_querycap(struct file *file, void *fh,
616 struct v4l2_capability *cap)
617{
618 struct airspy *s = video_drvdata(file);
619
620 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
621 strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
622 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
623 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
624 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
625 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
626
627 return 0;
628}
629
630static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv,
631 struct v4l2_fmtdesc *f)
632{
633 if (f->index >= NUM_FORMATS)
634 return -EINVAL;
635
636 strlcpy(f->description, formats[f->index].name, sizeof(f->description));
637 f->pixelformat = formats[f->index].pixelformat;
638
639 return 0;
640}
641
642static int airspy_g_fmt_sdr_cap(struct file *file, void *priv,
643 struct v4l2_format *f)
644{
645 struct airspy *s = video_drvdata(file);
646
647 f->fmt.sdr.pixelformat = s->pixelformat;
648 f->fmt.sdr.buffersize = s->buffersize;
649 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
650
651 return 0;
652}
653
654static int airspy_s_fmt_sdr_cap(struct file *file, void *priv,
655 struct v4l2_format *f)
656{
657 struct airspy *s = video_drvdata(file);
658 struct vb2_queue *q = &s->vb_queue;
659 int i;
660
661 if (vb2_is_busy(q))
662 return -EBUSY;
663
664 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
665 for (i = 0; i < NUM_FORMATS; i++) {
666 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
667 s->pixelformat = formats[i].pixelformat;
668 s->buffersize = formats[i].buffersize;
669 f->fmt.sdr.buffersize = formats[i].buffersize;
670 return 0;
671 }
672 }
673
674 s->pixelformat = formats[0].pixelformat;
675 s->buffersize = formats[0].buffersize;
676 f->fmt.sdr.pixelformat = formats[0].pixelformat;
677 f->fmt.sdr.buffersize = formats[0].buffersize;
678
679 return 0;
680}
681
682static int airspy_try_fmt_sdr_cap(struct file *file, void *priv,
683 struct v4l2_format *f)
684{
685 int i;
686
687 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
688 for (i = 0; i < NUM_FORMATS; i++) {
689 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
690 f->fmt.sdr.buffersize = formats[i].buffersize;
691 return 0;
692 }
693 }
694
695 f->fmt.sdr.pixelformat = formats[0].pixelformat;
696 f->fmt.sdr.buffersize = formats[0].buffersize;
697
698 return 0;
699}
700
701static int airspy_s_tuner(struct file *file, void *priv,
702 const struct v4l2_tuner *v)
703{
704 int ret;
705
706 if (v->index == 0)
707 ret = 0;
708 else if (v->index == 1)
709 ret = 0;
710 else
711 ret = -EINVAL;
712
713 return ret;
714}
715
716static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
717{
718 int ret;
719
720 if (v->index == 0) {
721 strlcpy(v->name, "AirSpy ADC", sizeof(v->name));
722 v->type = V4L2_TUNER_ADC;
723 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
724 v->rangelow = bands[0].rangelow;
725 v->rangehigh = bands[0].rangehigh;
726 ret = 0;
727 } else if (v->index == 1) {
728 strlcpy(v->name, "AirSpy RF", sizeof(v->name));
729 v->type = V4L2_TUNER_RF;
730 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
731 v->rangelow = bands_rf[0].rangelow;
732 v->rangehigh = bands_rf[0].rangehigh;
733 ret = 0;
734 } else {
735 ret = -EINVAL;
736 }
737
738 return ret;
739}
740
741static int airspy_g_frequency(struct file *file, void *priv,
742 struct v4l2_frequency *f)
743{
744 struct airspy *s = video_drvdata(file);
745 int ret;
746
747 if (f->tuner == 0) {
748 f->type = V4L2_TUNER_ADC;
749 f->frequency = s->f_adc;
750 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
751 ret = 0;
752 } else if (f->tuner == 1) {
753 f->type = V4L2_TUNER_RF;
754 f->frequency = s->f_rf;
755 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
756 ret = 0;
757 } else {
758 ret = -EINVAL;
759 }
760
761 return ret;
762}
763
764static int airspy_s_frequency(struct file *file, void *priv,
765 const struct v4l2_frequency *f)
766{
767 struct airspy *s = video_drvdata(file);
768 int ret;
769 u8 buf[4];
770
771 if (f->tuner == 0) {
772 s->f_adc = clamp_t(unsigned int, f->frequency,
773 bands[0].rangelow,
774 bands[0].rangehigh);
775 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
776 ret = 0;
777 } else if (f->tuner == 1) {
778 s->f_rf = clamp_t(unsigned int, f->frequency,
779 bands_rf[0].rangelow,
780 bands_rf[0].rangehigh);
781 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
782 buf[0] = (s->f_rf >> 0) & 0xff;
783 buf[1] = (s->f_rf >> 8) & 0xff;
784 buf[2] = (s->f_rf >> 16) & 0xff;
785 buf[3] = (s->f_rf >> 24) & 0xff;
786 ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4);
787 } else {
788 ret = -EINVAL;
789 }
790
791 return ret;
792}
793
794static int airspy_enum_freq_bands(struct file *file, void *priv,
795 struct v4l2_frequency_band *band)
796{
797 int ret;
798
799 if (band->tuner == 0) {
800 if (band->index >= ARRAY_SIZE(bands)) {
801 ret = -EINVAL;
802 } else {
803 *band = bands[band->index];
804 ret = 0;
805 }
806 } else if (band->tuner == 1) {
807 if (band->index >= ARRAY_SIZE(bands_rf)) {
808 ret = -EINVAL;
809 } else {
810 *band = bands_rf[band->index];
811 ret = 0;
812 }
813 } else {
814 ret = -EINVAL;
815 }
816
817 return ret;
818}
819
820static const struct v4l2_ioctl_ops airspy_ioctl_ops = {
821 .vidioc_querycap = airspy_querycap,
822
823 .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap,
824 .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap,
825 .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap,
826 .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap,
827
828 .vidioc_reqbufs = vb2_ioctl_reqbufs,
829 .vidioc_create_bufs = vb2_ioctl_create_bufs,
830 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
831 .vidioc_querybuf = vb2_ioctl_querybuf,
832 .vidioc_qbuf = vb2_ioctl_qbuf,
833 .vidioc_dqbuf = vb2_ioctl_dqbuf,
834
835 .vidioc_streamon = vb2_ioctl_streamon,
836 .vidioc_streamoff = vb2_ioctl_streamoff,
837
838 .vidioc_g_tuner = airspy_g_tuner,
839 .vidioc_s_tuner = airspy_s_tuner,
840
841 .vidioc_g_frequency = airspy_g_frequency,
842 .vidioc_s_frequency = airspy_s_frequency,
843 .vidioc_enum_freq_bands = airspy_enum_freq_bands,
844
845 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
846 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
847 .vidioc_log_status = v4l2_ctrl_log_status,
848};
849
850static const struct v4l2_file_operations airspy_fops = {
851 .owner = THIS_MODULE,
852 .open = v4l2_fh_open,
853 .release = vb2_fop_release,
854 .read = vb2_fop_read,
855 .poll = vb2_fop_poll,
856 .mmap = vb2_fop_mmap,
857 .unlocked_ioctl = video_ioctl2,
858};
859
860static struct video_device airspy_template = {
861 .name = "AirSpy SDR",
862 .release = video_device_release_empty,
863 .fops = &airspy_fops,
864 .ioctl_ops = &airspy_ioctl_ops,
865};
866
867static void airspy_video_release(struct v4l2_device *v)
868{
869 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
870
871 v4l2_ctrl_handler_free(&s->hdl);
872 v4l2_device_unregister(&s->v4l2_dev);
873 kfree(s);
874}
875
876static int airspy_set_lna_gain(struct airspy *s)
877{
878 int ret;
879 u8 u8tmp;
880
881 dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n",
882 s->lna_gain_auto->cur.val, s->lna_gain_auto->val,
883 s->lna_gain->cur.val, s->lna_gain->val);
884
885 ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val,
886 &u8tmp, 1);
887 if (ret)
888 goto err;
889
890 if (s->lna_gain_auto->val == false) {
891 ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val,
892 &u8tmp, 1);
893 if (ret)
894 goto err;
895 }
896err:
897 if (ret)
898 dev_dbg(s->dev, "failed=%d\n", ret);
899
900 return ret;
901}
902
903static int airspy_set_mixer_gain(struct airspy *s)
904{
905 int ret;
906 u8 u8tmp;
907
908 dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n",
909 s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val,
910 s->mixer_gain->cur.val, s->mixer_gain->val);
911
912 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val,
913 &u8tmp, 1);
914 if (ret)
915 goto err;
916
917 if (s->mixer_gain_auto->val == false) {
918 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0,
919 s->mixer_gain->val, &u8tmp, 1);
920 if (ret)
921 goto err;
922 }
923err:
924 if (ret)
925 dev_dbg(s->dev, "failed=%d\n", ret);
926
927 return ret;
928}
929
930static int airspy_set_if_gain(struct airspy *s)
931{
932 int ret;
933 u8 u8tmp;
934
935 dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val);
936
937 ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val,
938 &u8tmp, 1);
939 if (ret)
940 goto err;
941err:
942 if (ret)
943 dev_dbg(s->dev, "failed=%d\n", ret);
944
945 return ret;
946}
947
948static int airspy_s_ctrl(struct v4l2_ctrl *ctrl)
949{
950 struct airspy *s = container_of(ctrl->handler, struct airspy, hdl);
951 int ret;
952
953 switch (ctrl->id) {
954 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
955 case V4L2_CID_RF_TUNER_LNA_GAIN:
956 ret = airspy_set_lna_gain(s);
957 break;
958 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
959 case V4L2_CID_RF_TUNER_MIXER_GAIN:
960 ret = airspy_set_mixer_gain(s);
961 break;
962 case V4L2_CID_RF_TUNER_IF_GAIN:
963 ret = airspy_set_if_gain(s);
964 break;
965 default:
966 dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n",
967 ctrl->id, ctrl->name);
968 ret = -EINVAL;
969 }
970
971 return ret;
972}
973
974static const struct v4l2_ctrl_ops airspy_ctrl_ops = {
975 .s_ctrl = airspy_s_ctrl,
976};
977
978static int airspy_probe(struct usb_interface *intf,
979 const struct usb_device_id *id)
980{
981 struct airspy *s;
982 int ret;
983 u8 u8tmp, buf[BUF_SIZE];
984
985 s = kzalloc(sizeof(struct airspy), GFP_KERNEL);
986 if (s == NULL) {
987 dev_err(&intf->dev, "Could not allocate memory for state\n");
988 return -ENOMEM;
989 }
990
991 mutex_init(&s->v4l2_lock);
992 mutex_init(&s->vb_queue_lock);
993 spin_lock_init(&s->queued_bufs_lock);
994 INIT_LIST_HEAD(&s->queued_bufs);
995 s->dev = &intf->dev;
996 s->udev = interface_to_usbdev(intf);
997 s->f_adc = bands[0].rangelow;
998 s->f_rf = bands_rf[0].rangelow;
999 s->pixelformat = formats[0].pixelformat;
1000 s->buffersize = formats[0].buffersize;
1001
1002
1003 ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
1004 if (ret == 0)
1005 ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0,
1006 buf, BUF_SIZE);
1007 if (ret) {
1008 dev_err(s->dev, "Could not detect board\n");
1009 goto err_free_mem;
1010 }
1011
1012 buf[BUF_SIZE - 1] = '\0';
1013
1014 dev_info(s->dev, "Board ID: %02x\n", u8tmp);
1015 dev_info(s->dev, "Firmware version: %s\n", buf);
1016
1017
1018 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1019 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1020 s->vb_queue.drv_priv = s;
1021 s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf);
1022 s->vb_queue.ops = &airspy_vb2_ops;
1023 s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1024 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1025 ret = vb2_queue_init(&s->vb_queue);
1026 if (ret) {
1027 dev_err(s->dev, "Could not initialize vb2 queue\n");
1028 goto err_free_mem;
1029 }
1030
1031
1032 s->vdev = airspy_template;
1033 s->vdev.queue = &s->vb_queue;
1034 s->vdev.queue->lock = &s->vb_queue_lock;
1035 video_set_drvdata(&s->vdev, s);
1036
1037
1038 s->v4l2_dev.release = airspy_video_release;
1039 ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
1040 if (ret) {
1041 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret);
1042 goto err_free_mem;
1043 }
1044
1045
1046 v4l2_ctrl_handler_init(&s->hdl, 5);
1047 s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1048 V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0);
1049 s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1050 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8);
1051 v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
1052 s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1053 V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0);
1054 s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1055 V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8);
1056 v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
1057 s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1058 V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0);
1059 if (s->hdl.error) {
1060 ret = s->hdl.error;
1061 dev_err(s->dev, "Could not initialize controls\n");
1062 goto err_free_controls;
1063 }
1064
1065 v4l2_ctrl_handler_setup(&s->hdl);
1066
1067 s->v4l2_dev.ctrl_handler = &s->hdl;
1068 s->vdev.v4l2_dev = &s->v4l2_dev;
1069 s->vdev.lock = &s->v4l2_lock;
1070
1071 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1072 if (ret) {
1073 dev_err(s->dev, "Failed to register as video device (%d)\n",
1074 ret);
1075 goto err_unregister_v4l2_dev;
1076 }
1077 dev_info(s->dev, "Registered as %s\n",
1078 video_device_node_name(&s->vdev));
1079 dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n");
1080 return 0;
1081
1082err_free_controls:
1083 v4l2_ctrl_handler_free(&s->hdl);
1084err_unregister_v4l2_dev:
1085 v4l2_device_unregister(&s->v4l2_dev);
1086err_free_mem:
1087 kfree(s);
1088 return ret;
1089}
1090
1091
1092static struct usb_device_id airspy_id_table[] = {
1093 { USB_DEVICE(0x1d50, 0x60a1) },
1094 { }
1095};
1096MODULE_DEVICE_TABLE(usb, airspy_id_table);
1097
1098
1099static struct usb_driver airspy_driver = {
1100 .name = KBUILD_MODNAME,
1101 .probe = airspy_probe,
1102 .disconnect = airspy_disconnect,
1103 .id_table = airspy_id_table,
1104};
1105
1106module_usb_driver(airspy_driver);
1107
1108MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1109MODULE_DESCRIPTION("AirSpy SDR");
1110MODULE_LICENSE("GPL");
1111
