1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * AirSpy SDR driver
4 *
5 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
6 */
7
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 /* AirSpy USB API commands (from AirSpy Library) */
19 enum {
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 * bEndpointAddress 0x81 EP 1 IN
44 * Transfer Type Bulk
45 * wMaxPacketSize 0x0200 1x 512 bytes
46 */
47 #define MAX_BULK_BUFS (6)
48 #define BULK_BUFFER_SIZE (128 * 512)
49
50 static 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
61 static 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 /* stream formats */
73 struct airspy_format {
74 u32 pixelformat;
75 u32 buffersize;
76 };
77
78 /* format descriptions for capture and preview */
79 static struct airspy_format formats[] = {
80 {
81 .pixelformat = V4L2_SDR_FMT_RU12LE,
82 .buffersize = BULK_BUFFER_SIZE,
83 },
84 };
85
86 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
87
88 /* intermediate buffers with raw data from the USB device */
89 struct airspy_frame_buf {
90 /* common v4l buffer stuff -- must be first */
91 struct vb2_v4l2_buffer vb;
92 struct list_head list;
93 };
94
95 struct airspy {
96 #define POWER_ON 1
97 #define USB_STATE_URB_BUF 2
98 unsigned long flags;
99
100 struct device *dev;
101 struct usb_device *udev;
102 struct video_device vdev;
103 struct v4l2_device v4l2_dev;
104
105 /* videobuf2 queue and queued buffers list */
106 struct vb2_queue vb_queue;
107 struct list_head queued_bufs;
108 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
109 unsigned sequence; /* Buffer sequence counter */
110 unsigned int vb_full; /* vb is full and packets dropped */
111
112 /* Note if taking both locks v4l2_lock must always be locked first! */
113 struct mutex v4l2_lock; /* Protects everything else */
114 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
115
116 struct urb *urb_list[MAX_BULK_BUFS];
117 int buf_num;
118 unsigned long buf_size;
119 u8 *buf_list[MAX_BULK_BUFS];
120 dma_addr_t dma_addr[MAX_BULK_BUFS];
121 int urbs_initialized;
122 int urbs_submitted;
123
124 /* USB control message buffer */
125 #define BUF_SIZE 128
126 u8 *buf;
127
128 /* Current configuration */
129 unsigned int f_adc;
130 unsigned int f_rf;
131 u32 pixelformat;
132 u32 buffersize;
133
134 /* Controls */
135 struct v4l2_ctrl_handler hdl;
136 struct v4l2_ctrl *lna_gain_auto;
137 struct v4l2_ctrl *lna_gain;
138 struct v4l2_ctrl *mixer_gain_auto;
139 struct v4l2_ctrl *mixer_gain;
140 struct v4l2_ctrl *if_gain;
141
142 /* Sample rate calc */
143 unsigned long jiffies_next;
144 unsigned int sample;
145 unsigned int sample_measured;
146 };
147
148 #define airspy_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
149 char *_direction; \
150 if (_t & USB_DIR_IN) \
151 _direction = "<<<"; \
152 else \
153 _direction = ">>>"; \
154 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
155 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
156 _l & 0xff, _l >> 8, _direction, _l, _b); \
157 }
158
159 /* execute firmware command */
airspy_ctrl_msg(struct airspy * s,u8 request,u16 value,u16 index,u8 * data,u16 size)160 static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index,
161 u8 *data, u16 size)
162 {
163 int ret;
164 unsigned int pipe;
165 u8 requesttype;
166
167 switch (request) {
168 case CMD_RECEIVER_MODE:
169 case CMD_SET_FREQ:
170 pipe = usb_sndctrlpipe(s->udev, 0);
171 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
172 break;
173 case CMD_BOARD_ID_READ:
174 case CMD_VERSION_STRING_READ:
175 case CMD_BOARD_PARTID_SERIALNO_READ:
176 case CMD_SET_LNA_GAIN:
177 case CMD_SET_MIXER_GAIN:
178 case CMD_SET_VGA_GAIN:
179 case CMD_SET_LNA_AGC:
180 case CMD_SET_MIXER_AGC:
181 pipe = usb_rcvctrlpipe(s->udev, 0);
182 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
183 break;
184 default:
185 dev_err(s->dev, "Unknown command %02x\n", request);
186 ret = -EINVAL;
187 goto err;
188 }
189
190 /* write request */
191 if (!(requesttype & USB_DIR_IN))
192 memcpy(s->buf, data, size);
193
194 ret = usb_control_msg(s->udev, pipe, request, requesttype, value,
195 index, s->buf, size, 1000);
196 airspy_dbg_usb_control_msg(s->dev, request, requesttype, value,
197 index, s->buf, size);
198 if (ret < 0) {
199 dev_err(s->dev, "usb_control_msg() failed %d request %02x\n",
200 ret, request);
201 goto err;
202 }
203
204 /* read request */
205 if (requesttype & USB_DIR_IN)
206 memcpy(data, s->buf, size);
207
208 return 0;
209 err:
210 return ret;
211 }
212
213 /* Private functions */
airspy_get_next_fill_buf(struct airspy * s)214 static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s)
215 {
216 unsigned long flags;
217 struct airspy_frame_buf *buf = NULL;
218
219 spin_lock_irqsave(&s->queued_bufs_lock, flags);
220 if (list_empty(&s->queued_bufs))
221 goto leave;
222
223 buf = list_entry(s->queued_bufs.next,
224 struct airspy_frame_buf, list);
225 list_del(&buf->list);
226 leave:
227 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
228 return buf;
229 }
230
airspy_convert_stream(struct airspy * s,void * dst,void * src,unsigned int src_len)231 static unsigned int airspy_convert_stream(struct airspy *s,
232 void *dst, void *src, unsigned int src_len)
233 {
234 unsigned int dst_len;
235
236 if (s->pixelformat == V4L2_SDR_FMT_RU12LE) {
237 memcpy(dst, src, src_len);
238 dst_len = src_len;
239 } else {
240 dst_len = 0;
241 }
242
243 /* calculate sample rate and output it in 10 seconds intervals */
244 if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
245 #define MSECS 10000UL
246 unsigned int msecs = jiffies_to_msecs(jiffies -
247 s->jiffies_next + msecs_to_jiffies(MSECS));
248 unsigned int samples = s->sample - s->sample_measured;
249
250 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
251 s->sample_measured = s->sample;
252 dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n",
253 src_len, samples, msecs,
254 samples * 1000UL / msecs);
255 }
256
257 /* total number of samples */
258 s->sample += src_len / 2;
259
260 return dst_len;
261 }
262
263 /*
264 * This gets called for the bulk stream pipe. This is done in interrupt
265 * time, so it has to be fast, not crash, and not stall. Neat.
266 */
airspy_urb_complete(struct urb * urb)267 static void airspy_urb_complete(struct urb *urb)
268 {
269 struct airspy *s = urb->context;
270 struct airspy_frame_buf *fbuf;
271
272 dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n",
273 urb->status, urb->actual_length,
274 urb->transfer_buffer_length, urb->error_count);
275
276 switch (urb->status) {
277 case 0: /* success */
278 case -ETIMEDOUT: /* NAK */
279 break;
280 case -ECONNRESET: /* kill */
281 case -ENOENT:
282 case -ESHUTDOWN:
283 return;
284 default: /* error */
285 dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status);
286 break;
287 }
288
289 if (likely(urb->actual_length > 0)) {
290 void *ptr;
291 unsigned int len;
292 /* get free framebuffer */
293 fbuf = airspy_get_next_fill_buf(s);
294 if (unlikely(fbuf == NULL)) {
295 s->vb_full++;
296 dev_notice_ratelimited(s->dev,
297 "video buffer is full, %d packets dropped\n",
298 s->vb_full);
299 goto skip;
300 }
301
302 /* fill framebuffer */
303 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
304 len = airspy_convert_stream(s, ptr, urb->transfer_buffer,
305 urb->actual_length);
306 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
307 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
308 fbuf->vb.sequence = s->sequence++;
309 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
310 }
311 skip:
312 usb_submit_urb(urb, GFP_ATOMIC);
313 }
314
airspy_kill_urbs(struct airspy * s)315 static int airspy_kill_urbs(struct airspy *s)
316 {
317 int i;
318
319 for (i = s->urbs_submitted - 1; i >= 0; i--) {
320 dev_dbg(s->dev, "kill urb=%d\n", i);
321 /* stop the URB */
322 usb_kill_urb(s->urb_list[i]);
323 }
324 s->urbs_submitted = 0;
325
326 return 0;
327 }
328
airspy_submit_urbs(struct airspy * s)329 static int airspy_submit_urbs(struct airspy *s)
330 {
331 int i, ret;
332
333 for (i = 0; i < s->urbs_initialized; i++) {
334 dev_dbg(s->dev, "submit urb=%d\n", i);
335 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
336 if (ret) {
337 dev_err(s->dev, "Could not submit URB no. %d - get them all back\n",
338 i);
339 airspy_kill_urbs(s);
340 return ret;
341 }
342 s->urbs_submitted++;
343 }
344
345 return 0;
346 }
347
airspy_free_stream_bufs(struct airspy * s)348 static int airspy_free_stream_bufs(struct airspy *s)
349 {
350 if (test_bit(USB_STATE_URB_BUF, &s->flags)) {
351 while (s->buf_num) {
352 s->buf_num--;
353 dev_dbg(s->dev, "free buf=%d\n", s->buf_num);
354 usb_free_coherent(s->udev, s->buf_size,
355 s->buf_list[s->buf_num],
356 s->dma_addr[s->buf_num]);
357 }
358 }
359 clear_bit(USB_STATE_URB_BUF, &s->flags);
360
361 return 0;
362 }
363
airspy_alloc_stream_bufs(struct airspy * s)364 static int airspy_alloc_stream_bufs(struct airspy *s)
365 {
366 s->buf_num = 0;
367 s->buf_size = BULK_BUFFER_SIZE;
368
369 dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n",
370 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
371
372 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
373 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
374 BULK_BUFFER_SIZE, GFP_ATOMIC,
375 &s->dma_addr[s->buf_num]);
376 if (!s->buf_list[s->buf_num]) {
377 dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num);
378 airspy_free_stream_bufs(s);
379 return -ENOMEM;
380 }
381
382 dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num,
383 s->buf_list[s->buf_num],
384 (long long)s->dma_addr[s->buf_num]);
385 set_bit(USB_STATE_URB_BUF, &s->flags);
386 }
387
388 return 0;
389 }
390
airspy_free_urbs(struct airspy * s)391 static int airspy_free_urbs(struct airspy *s)
392 {
393 int i;
394
395 airspy_kill_urbs(s);
396
397 for (i = s->urbs_initialized - 1; i >= 0; i--) {
398 if (s->urb_list[i]) {
399 dev_dbg(s->dev, "free urb=%d\n", i);
400 /* free the URBs */
401 usb_free_urb(s->urb_list[i]);
402 }
403 }
404 s->urbs_initialized = 0;
405
406 return 0;
407 }
408
airspy_alloc_urbs(struct airspy * s)409 static int airspy_alloc_urbs(struct airspy *s)
410 {
411 int i, j;
412
413 /* allocate the URBs */
414 for (i = 0; i < MAX_BULK_BUFS; i++) {
415 dev_dbg(s->dev, "alloc urb=%d\n", i);
416 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
417 if (!s->urb_list[i]) {
418 for (j = 0; j < i; j++) {
419 usb_free_urb(s->urb_list[j]);
420 s->urb_list[j] = NULL;
421 }
422 s->urbs_initialized = 0;
423 return -ENOMEM;
424 }
425 usb_fill_bulk_urb(s->urb_list[i],
426 s->udev,
427 usb_rcvbulkpipe(s->udev, 0x81),
428 s->buf_list[i],
429 BULK_BUFFER_SIZE,
430 airspy_urb_complete, s);
431
432 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
433 s->urb_list[i]->transfer_dma = s->dma_addr[i];
434 s->urbs_initialized++;
435 }
436
437 return 0;
438 }
439
440 /* Must be called with vb_queue_lock hold */
airspy_cleanup_queued_bufs(struct airspy * s)441 static void airspy_cleanup_queued_bufs(struct airspy *s)
442 {
443 unsigned long flags;
444
445 dev_dbg(s->dev, "\n");
446
447 spin_lock_irqsave(&s->queued_bufs_lock, flags);
448 while (!list_empty(&s->queued_bufs)) {
449 struct airspy_frame_buf *buf;
450
451 buf = list_entry(s->queued_bufs.next,
452 struct airspy_frame_buf, list);
453 list_del(&buf->list);
454 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
455 }
456 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
457 }
458
459 /* The user yanked out the cable... */
airspy_disconnect(struct usb_interface * intf)460 static void airspy_disconnect(struct usb_interface *intf)
461 {
462 struct v4l2_device *v = usb_get_intfdata(intf);
463 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
464
465 dev_dbg(s->dev, "\n");
466
467 mutex_lock(&s->vb_queue_lock);
468 mutex_lock(&s->v4l2_lock);
469 /* No need to keep the urbs around after disconnection */
470 s->udev = NULL;
471 v4l2_device_disconnect(&s->v4l2_dev);
472 video_unregister_device(&s->vdev);
473 mutex_unlock(&s->v4l2_lock);
474 mutex_unlock(&s->vb_queue_lock);
475
476 v4l2_device_put(&s->v4l2_dev);
477 }
478
479 /* Videobuf2 operations */
airspy_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])480 static int airspy_queue_setup(struct vb2_queue *vq,
481 unsigned int *nbuffers,
482 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
483 {
484 struct airspy *s = vb2_get_drv_priv(vq);
485 unsigned int q_num_bufs = vb2_get_num_buffers(vq);
486
487 dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers);
488
489 /* Need at least 8 buffers */
490 if (q_num_bufs + *nbuffers < 8)
491 *nbuffers = 8 - q_num_bufs;
492 *nplanes = 1;
493 sizes[0] = PAGE_ALIGN(s->buffersize);
494
495 dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
496 return 0;
497 }
498
airspy_buf_queue(struct vb2_buffer * vb)499 static void airspy_buf_queue(struct vb2_buffer *vb)
500 {
501 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
502 struct airspy *s = vb2_get_drv_priv(vb->vb2_queue);
503 struct airspy_frame_buf *buf =
504 container_of(vbuf, struct airspy_frame_buf, vb);
505 unsigned long flags;
506
507 /* Check the device has not disconnected between prep and queuing */
508 if (unlikely(!s->udev)) {
509 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
510 return;
511 }
512
513 spin_lock_irqsave(&s->queued_bufs_lock, flags);
514 list_add_tail(&buf->list, &s->queued_bufs);
515 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
516 }
517
airspy_start_streaming(struct vb2_queue * vq,unsigned int count)518 static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count)
519 {
520 struct airspy *s = vb2_get_drv_priv(vq);
521 int ret;
522
523 dev_dbg(s->dev, "\n");
524
525 if (!s->udev)
526 return -ENODEV;
527
528 mutex_lock(&s->v4l2_lock);
529
530 s->sequence = 0;
531
532 set_bit(POWER_ON, &s->flags);
533
534 ret = airspy_alloc_stream_bufs(s);
535 if (ret)
536 goto err_clear_bit;
537
538 ret = airspy_alloc_urbs(s);
539 if (ret)
540 goto err_free_stream_bufs;
541
542 ret = airspy_submit_urbs(s);
543 if (ret)
544 goto err_free_urbs;
545
546 /* start hardware streaming */
547 ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0);
548 if (ret)
549 goto err_kill_urbs;
550
551 goto exit_mutex_unlock;
552
553 err_kill_urbs:
554 airspy_kill_urbs(s);
555 err_free_urbs:
556 airspy_free_urbs(s);
557 err_free_stream_bufs:
558 airspy_free_stream_bufs(s);
559 err_clear_bit:
560 clear_bit(POWER_ON, &s->flags);
561
562 /* return all queued buffers to vb2 */
563 {
564 struct airspy_frame_buf *buf, *tmp;
565
566 list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) {
567 list_del(&buf->list);
568 vb2_buffer_done(&buf->vb.vb2_buf,
569 VB2_BUF_STATE_QUEUED);
570 }
571 }
572
573 exit_mutex_unlock:
574 mutex_unlock(&s->v4l2_lock);
575
576 return ret;
577 }
578
airspy_stop_streaming(struct vb2_queue * vq)579 static void airspy_stop_streaming(struct vb2_queue *vq)
580 {
581 struct airspy *s = vb2_get_drv_priv(vq);
582
583 dev_dbg(s->dev, "\n");
584
585 mutex_lock(&s->v4l2_lock);
586
587 /* stop hardware streaming */
588 airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0);
589
590 airspy_kill_urbs(s);
591 airspy_free_urbs(s);
592 airspy_free_stream_bufs(s);
593
594 airspy_cleanup_queued_bufs(s);
595
596 clear_bit(POWER_ON, &s->flags);
597
598 mutex_unlock(&s->v4l2_lock);
599 }
600
601 static const struct vb2_ops airspy_vb2_ops = {
602 .queue_setup = airspy_queue_setup,
603 .buf_queue = airspy_buf_queue,
604 .start_streaming = airspy_start_streaming,
605 .stop_streaming = airspy_stop_streaming,
606 .wait_prepare = vb2_ops_wait_prepare,
607 .wait_finish = vb2_ops_wait_finish,
608 };
609
airspy_querycap(struct file * file,void * fh,struct v4l2_capability * cap)610 static int airspy_querycap(struct file *file, void *fh,
611 struct v4l2_capability *cap)
612 {
613 struct airspy *s = video_drvdata(file);
614
615 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
616 strscpy(cap->card, s->vdev.name, sizeof(cap->card));
617 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
618 return 0;
619 }
620
airspy_enum_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)621 static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv,
622 struct v4l2_fmtdesc *f)
623 {
624 if (f->index >= NUM_FORMATS)
625 return -EINVAL;
626
627 f->pixelformat = formats[f->index].pixelformat;
628
629 return 0;
630 }
631
airspy_g_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)632 static int airspy_g_fmt_sdr_cap(struct file *file, void *priv,
633 struct v4l2_format *f)
634 {
635 struct airspy *s = video_drvdata(file);
636
637 f->fmt.sdr.pixelformat = s->pixelformat;
638 f->fmt.sdr.buffersize = s->buffersize;
639
640 return 0;
641 }
642
airspy_s_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)643 static 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 for (i = 0; i < NUM_FORMATS; i++) {
654 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
655 s->pixelformat = formats[i].pixelformat;
656 s->buffersize = formats[i].buffersize;
657 f->fmt.sdr.buffersize = formats[i].buffersize;
658 return 0;
659 }
660 }
661
662 s->pixelformat = formats[0].pixelformat;
663 s->buffersize = formats[0].buffersize;
664 f->fmt.sdr.pixelformat = formats[0].pixelformat;
665 f->fmt.sdr.buffersize = formats[0].buffersize;
666
667 return 0;
668 }
669
airspy_try_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)670 static int airspy_try_fmt_sdr_cap(struct file *file, void *priv,
671 struct v4l2_format *f)
672 {
673 int i;
674
675 for (i = 0; i < NUM_FORMATS; i++) {
676 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
677 f->fmt.sdr.buffersize = formats[i].buffersize;
678 return 0;
679 }
680 }
681
682 f->fmt.sdr.pixelformat = formats[0].pixelformat;
683 f->fmt.sdr.buffersize = formats[0].buffersize;
684
685 return 0;
686 }
687
airspy_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * v)688 static int airspy_s_tuner(struct file *file, void *priv,
689 const struct v4l2_tuner *v)
690 {
691 int ret;
692
693 if (v->index == 0)
694 ret = 0;
695 else if (v->index == 1)
696 ret = 0;
697 else
698 ret = -EINVAL;
699
700 return ret;
701 }
702
airspy_g_tuner(struct file * file,void * priv,struct v4l2_tuner * v)703 static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
704 {
705 int ret;
706
707 if (v->index == 0) {
708 strscpy(v->name, "AirSpy ADC", sizeof(v->name));
709 v->type = V4L2_TUNER_ADC;
710 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
711 v->rangelow = bands[0].rangelow;
712 v->rangehigh = bands[0].rangehigh;
713 ret = 0;
714 } else if (v->index == 1) {
715 strscpy(v->name, "AirSpy RF", sizeof(v->name));
716 v->type = V4L2_TUNER_RF;
717 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
718 v->rangelow = bands_rf[0].rangelow;
719 v->rangehigh = bands_rf[0].rangehigh;
720 ret = 0;
721 } else {
722 ret = -EINVAL;
723 }
724
725 return ret;
726 }
727
airspy_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)728 static int airspy_g_frequency(struct file *file, void *priv,
729 struct v4l2_frequency *f)
730 {
731 struct airspy *s = video_drvdata(file);
732 int ret;
733
734 if (f->tuner == 0) {
735 f->type = V4L2_TUNER_ADC;
736 f->frequency = s->f_adc;
737 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
738 ret = 0;
739 } else if (f->tuner == 1) {
740 f->type = V4L2_TUNER_RF;
741 f->frequency = s->f_rf;
742 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
743 ret = 0;
744 } else {
745 ret = -EINVAL;
746 }
747
748 return ret;
749 }
750
airspy_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)751 static int airspy_s_frequency(struct file *file, void *priv,
752 const struct v4l2_frequency *f)
753 {
754 struct airspy *s = video_drvdata(file);
755 int ret;
756 u8 buf[4];
757
758 if (f->tuner == 0) {
759 s->f_adc = clamp_t(unsigned int, f->frequency,
760 bands[0].rangelow,
761 bands[0].rangehigh);
762 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
763 ret = 0;
764 } else if (f->tuner == 1) {
765 s->f_rf = clamp_t(unsigned int, f->frequency,
766 bands_rf[0].rangelow,
767 bands_rf[0].rangehigh);
768 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
769 buf[0] = (s->f_rf >> 0) & 0xff;
770 buf[1] = (s->f_rf >> 8) & 0xff;
771 buf[2] = (s->f_rf >> 16) & 0xff;
772 buf[3] = (s->f_rf >> 24) & 0xff;
773 ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4);
774 } else {
775 ret = -EINVAL;
776 }
777
778 return ret;
779 }
780
airspy_enum_freq_bands(struct file * file,void * priv,struct v4l2_frequency_band * band)781 static int airspy_enum_freq_bands(struct file *file, void *priv,
782 struct v4l2_frequency_band *band)
783 {
784 int ret;
785
786 if (band->tuner == 0) {
787 if (band->index >= ARRAY_SIZE(bands)) {
788 ret = -EINVAL;
789 } else {
790 *band = bands[band->index];
791 ret = 0;
792 }
793 } else if (band->tuner == 1) {
794 if (band->index >= ARRAY_SIZE(bands_rf)) {
795 ret = -EINVAL;
796 } else {
797 *band = bands_rf[band->index];
798 ret = 0;
799 }
800 } else {
801 ret = -EINVAL;
802 }
803
804 return ret;
805 }
806
807 static const struct v4l2_ioctl_ops airspy_ioctl_ops = {
808 .vidioc_querycap = airspy_querycap,
809
810 .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap,
811 .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap,
812 .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap,
813 .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap,
814
815 .vidioc_reqbufs = vb2_ioctl_reqbufs,
816 .vidioc_create_bufs = vb2_ioctl_create_bufs,
817 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
818 .vidioc_querybuf = vb2_ioctl_querybuf,
819 .vidioc_qbuf = vb2_ioctl_qbuf,
820 .vidioc_dqbuf = vb2_ioctl_dqbuf,
821
822 .vidioc_streamon = vb2_ioctl_streamon,
823 .vidioc_streamoff = vb2_ioctl_streamoff,
824
825 .vidioc_g_tuner = airspy_g_tuner,
826 .vidioc_s_tuner = airspy_s_tuner,
827
828 .vidioc_g_frequency = airspy_g_frequency,
829 .vidioc_s_frequency = airspy_s_frequency,
830 .vidioc_enum_freq_bands = airspy_enum_freq_bands,
831
832 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
833 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
834 .vidioc_log_status = v4l2_ctrl_log_status,
835 };
836
837 static const struct v4l2_file_operations airspy_fops = {
838 .owner = THIS_MODULE,
839 .open = v4l2_fh_open,
840 .release = vb2_fop_release,
841 .read = vb2_fop_read,
842 .poll = vb2_fop_poll,
843 .mmap = vb2_fop_mmap,
844 .unlocked_ioctl = video_ioctl2,
845 };
846
847 static const struct video_device airspy_template = {
848 .name = "AirSpy SDR",
849 .release = video_device_release_empty,
850 .fops = &airspy_fops,
851 .ioctl_ops = &airspy_ioctl_ops,
852 };
853
airspy_video_release(struct v4l2_device * v)854 static void airspy_video_release(struct v4l2_device *v)
855 {
856 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
857
858 v4l2_ctrl_handler_free(&s->hdl);
859 v4l2_device_unregister(&s->v4l2_dev);
860 kfree(s->buf);
861 kfree(s);
862 }
863
airspy_set_lna_gain(struct airspy * s)864 static int airspy_set_lna_gain(struct airspy *s)
865 {
866 int ret;
867 u8 u8tmp;
868
869 dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n",
870 s->lna_gain_auto->cur.val, s->lna_gain_auto->val,
871 s->lna_gain->cur.val, s->lna_gain->val);
872
873 ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val,
874 &u8tmp, 1);
875 if (ret)
876 goto err;
877
878 if (s->lna_gain_auto->val == false) {
879 ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val,
880 &u8tmp, 1);
881 if (ret)
882 goto err;
883 }
884 err:
885 if (ret)
886 dev_dbg(s->dev, "failed=%d\n", ret);
887
888 return ret;
889 }
890
airspy_set_mixer_gain(struct airspy * s)891 static int airspy_set_mixer_gain(struct airspy *s)
892 {
893 int ret;
894 u8 u8tmp;
895
896 dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n",
897 s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val,
898 s->mixer_gain->cur.val, s->mixer_gain->val);
899
900 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val,
901 &u8tmp, 1);
902 if (ret)
903 goto err;
904
905 if (s->mixer_gain_auto->val == false) {
906 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0,
907 s->mixer_gain->val, &u8tmp, 1);
908 if (ret)
909 goto err;
910 }
911 err:
912 if (ret)
913 dev_dbg(s->dev, "failed=%d\n", ret);
914
915 return ret;
916 }
917
airspy_set_if_gain(struct airspy * s)918 static int airspy_set_if_gain(struct airspy *s)
919 {
920 int ret;
921 u8 u8tmp;
922
923 dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val);
924
925 ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val,
926 &u8tmp, 1);
927 if (ret)
928 dev_dbg(s->dev, "failed=%d\n", ret);
929
930 return ret;
931 }
932
airspy_s_ctrl(struct v4l2_ctrl * ctrl)933 static int airspy_s_ctrl(struct v4l2_ctrl *ctrl)
934 {
935 struct airspy *s = container_of(ctrl->handler, struct airspy, hdl);
936 int ret;
937
938 switch (ctrl->id) {
939 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
940 case V4L2_CID_RF_TUNER_LNA_GAIN:
941 ret = airspy_set_lna_gain(s);
942 break;
943 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
944 case V4L2_CID_RF_TUNER_MIXER_GAIN:
945 ret = airspy_set_mixer_gain(s);
946 break;
947 case V4L2_CID_RF_TUNER_IF_GAIN:
948 ret = airspy_set_if_gain(s);
949 break;
950 default:
951 dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n",
952 ctrl->id, ctrl->name);
953 ret = -EINVAL;
954 }
955
956 return ret;
957 }
958
959 static const struct v4l2_ctrl_ops airspy_ctrl_ops = {
960 .s_ctrl = airspy_s_ctrl,
961 };
962
airspy_probe(struct usb_interface * intf,const struct usb_device_id * id)963 static int airspy_probe(struct usb_interface *intf,
964 const struct usb_device_id *id)
965 {
966 struct airspy *s;
967 int ret;
968 u8 u8tmp, *buf;
969
970 buf = NULL;
971 ret = -ENOMEM;
972
973 s = kzalloc(sizeof(struct airspy), GFP_KERNEL);
974 if (s == NULL) {
975 dev_err(&intf->dev, "Could not allocate memory for state\n");
976 return -ENOMEM;
977 }
978
979 s->buf = kzalloc(BUF_SIZE, GFP_KERNEL);
980 if (!s->buf)
981 goto err_free_mem;
982 buf = kzalloc(BUF_SIZE, GFP_KERNEL);
983 if (!buf)
984 goto err_free_mem;
985
986 mutex_init(&s->v4l2_lock);
987 mutex_init(&s->vb_queue_lock);
988 spin_lock_init(&s->queued_bufs_lock);
989 INIT_LIST_HEAD(&s->queued_bufs);
990 s->dev = &intf->dev;
991 s->udev = interface_to_usbdev(intf);
992 s->f_adc = bands[0].rangelow;
993 s->f_rf = bands_rf[0].rangelow;
994 s->pixelformat = formats[0].pixelformat;
995 s->buffersize = formats[0].buffersize;
996
997 /* Detect device */
998 ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
999 if (ret == 0)
1000 ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0,
1001 buf, BUF_SIZE);
1002 if (ret) {
1003 dev_err(s->dev, "Could not detect board\n");
1004 goto err_free_mem;
1005 }
1006
1007 buf[BUF_SIZE - 1] = '\0';
1008
1009 dev_info(s->dev, "Board ID: %02x\n", u8tmp);
1010 dev_info(s->dev, "Firmware version: %s\n", buf);
1011
1012 /* Init videobuf2 queue structure */
1013 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1014 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1015 s->vb_queue.drv_priv = s;
1016 s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf);
1017 s->vb_queue.ops = &airspy_vb2_ops;
1018 s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1019 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1020 ret = vb2_queue_init(&s->vb_queue);
1021 if (ret) {
1022 dev_err(s->dev, "Could not initialize vb2 queue\n");
1023 goto err_free_mem;
1024 }
1025
1026 /* Init video_device structure */
1027 s->vdev = airspy_template;
1028 s->vdev.queue = &s->vb_queue;
1029 s->vdev.queue->lock = &s->vb_queue_lock;
1030 video_set_drvdata(&s->vdev, s);
1031
1032 /* Register the v4l2_device structure */
1033 s->v4l2_dev.release = airspy_video_release;
1034 ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
1035 if (ret) {
1036 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret);
1037 goto err_free_mem;
1038 }
1039
1040 /* Register controls */
1041 v4l2_ctrl_handler_init(&s->hdl, 5);
1042 s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1043 V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0);
1044 s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1045 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8);
1046 v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
1047 s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1048 V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0);
1049 s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1050 V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8);
1051 v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
1052 s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1053 V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0);
1054 if (s->hdl.error) {
1055 ret = s->hdl.error;
1056 dev_err(s->dev, "Could not initialize controls\n");
1057 goto err_free_controls;
1058 }
1059
1060 v4l2_ctrl_handler_setup(&s->hdl);
1061
1062 s->v4l2_dev.ctrl_handler = &s->hdl;
1063 s->vdev.v4l2_dev = &s->v4l2_dev;
1064 s->vdev.lock = &s->v4l2_lock;
1065 s->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1066 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
1067
1068 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1069 if (ret) {
1070 dev_err(s->dev, "Failed to register as video device (%d)\n",
1071 ret);
1072 goto err_free_controls;
1073 }
1074
1075 /* Free buf if success*/
1076 kfree(buf);
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 v4l2_device_unregister(&s->v4l2_dev);
1086 err_free_mem:
1087 kfree(buf);
1088 kfree(s->buf);
1089 kfree(s);
1090 return ret;
1091 }
1092
1093 /* USB device ID list */
1094 static const struct usb_device_id airspy_id_table[] = {
1095 { USB_DEVICE(0x1d50, 0x60a1) }, /* AirSpy */
1096 { }
1097 };
1098 MODULE_DEVICE_TABLE(usb, airspy_id_table);
1099
1100 /* USB subsystem interface */
1101 static struct usb_driver airspy_driver = {
1102 .name = KBUILD_MODNAME,
1103 .probe = airspy_probe,
1104 .disconnect = airspy_disconnect,
1105 .id_table = airspy_id_table,
1106 };
1107
1108 module_usb_driver(airspy_driver);
1109
1110 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1111 MODULE_DESCRIPTION("AirSpy SDR");
1112 MODULE_LICENSE("GPL");
1113