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[media] airspy: remove unneeded spinlock irq flags initialization
[deliverable/linux.git] / drivers / media / usb / airspy / airspy.c
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-vmalloc.h>
25
26 /* AirSpy USB API commands (from AirSpy Library) */
27 enum {
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 * bEndpointAddress 0x81 EP 1 IN
52 * Transfer Type Bulk
53 * wMaxPacketSize 0x0200 1x 512 bytes
54 */
55 #define MAX_BULK_BUFS (6)
56 #define BULK_BUFFER_SIZE (128 * 512)
57
58 static 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
69 static 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 /* stream formats */
81 struct airspy_format {
82 char *name;
83 u32 pixelformat;
84 u32 buffersize;
85 };
86
87 /* format descriptions for capture and preview */
88 static struct airspy_format formats[] = {
89 {
90 .name = "Real U12LE",
91 .pixelformat = V4L2_SDR_FMT_RU12LE,
92 .buffersize = BULK_BUFFER_SIZE,
93 },
94 };
95
96 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
97
98 /* intermediate buffers with raw data from the USB device */
99 struct airspy_frame_buf {
100 struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
101 struct list_head list;
102 };
103
104 struct 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 /* videobuf2 queue and queued buffers list */
116 struct vb2_queue vb_queue;
117 struct list_head queued_bufs;
118 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
119 unsigned sequence; /* Buffer sequence counter */
120 unsigned int vb_full; /* vb is full and packets dropped */
121
122 /* Note if taking both locks v4l2_lock must always be locked first! */
123 struct mutex v4l2_lock; /* Protects everything else */
124 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
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 /* USB control message buffer */
135 #define BUF_SIZE 24
136 u8 buf[BUF_SIZE];
137
138 /* Current configuration */
139 unsigned int f_adc;
140 unsigned int f_rf;
141 u32 pixelformat;
142 u32 buffersize;
143
144 /* Controls */
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 /* Sample rate calc */
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 /* execute firmware command */
170 static 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 /* write request */
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 /* read request */
215 if (requesttype & USB_DIR_IN)
216 memcpy(data, s->buf, size);
217
218 return 0;
219 err:
220 return ret;
221 }
222
223 /* Private functions */
224 static 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);
236 leave:
237 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
238 return buf;
239 }
240
241 static 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 /* calculate samping rate and output it in 10 seconds intervals */
254 if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
255 #define MSECS 10000UL
256 unsigned int samples = s->sample - s->sample_measured;
257
258 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
259 s->sample_measured = s->sample;
260 dev_dbg(s->dev, "slen=%d samples=%u msecs=%lu sample rate=%lu\n",
261 src_len, samples, MSECS,
262 samples * 1000UL / MSECS);
263 }
264
265 /* total number of samples */
266 s->sample += src_len / 2;
267
268 return dst_len;
269 }
270
271 /*
272 * This gets called for the bulk stream pipe. This is done in interrupt
273 * time, so it has to be fast, not crash, and not stall. Neat.
274 */
275 static void airspy_urb_complete(struct urb *urb)
276 {
277 struct airspy *s = urb->context;
278 struct airspy_frame_buf *fbuf;
279
280 dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n",
281 urb->status, urb->actual_length,
282 urb->transfer_buffer_length, urb->error_count);
283
284 switch (urb->status) {
285 case 0: /* success */
286 case -ETIMEDOUT: /* NAK */
287 break;
288 case -ECONNRESET: /* kill */
289 case -ENOENT:
290 case -ESHUTDOWN:
291 return;
292 default: /* error */
293 dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status);
294 break;
295 }
296
297 if (likely(urb->actual_length > 0)) {
298 void *ptr;
299 unsigned int len;
300 /* get free framebuffer */
301 fbuf = airspy_get_next_fill_buf(s);
302 if (unlikely(fbuf == NULL)) {
303 s->vb_full++;
304 dev_notice_ratelimited(s->dev,
305 "videobuf is full, %d packets dropped\n",
306 s->vb_full);
307 goto skip;
308 }
309
310 /* fill framebuffer */
311 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
312 len = airspy_convert_stream(s, ptr, urb->transfer_buffer,
313 urb->actual_length);
314 vb2_set_plane_payload(&fbuf->vb, 0, len);
315 v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
316 fbuf->vb.v4l2_buf.sequence = s->sequence++;
317 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
318 }
319 skip:
320 usb_submit_urb(urb, GFP_ATOMIC);
321 }
322
323 static int airspy_kill_urbs(struct airspy *s)
324 {
325 int i;
326
327 for (i = s->urbs_submitted - 1; i >= 0; i--) {
328 dev_dbg(s->dev, "kill urb=%d\n", i);
329 /* stop the URB */
330 usb_kill_urb(s->urb_list[i]);
331 }
332 s->urbs_submitted = 0;
333
334 return 0;
335 }
336
337 static int airspy_submit_urbs(struct airspy *s)
338 {
339 int i, ret;
340
341 for (i = 0; i < s->urbs_initialized; i++) {
342 dev_dbg(s->dev, "submit urb=%d\n", i);
343 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
344 if (ret) {
345 dev_err(s->dev, "Could not submit URB no. %d - get them all back\n",
346 i);
347 airspy_kill_urbs(s);
348 return ret;
349 }
350 s->urbs_submitted++;
351 }
352
353 return 0;
354 }
355
356 static int airspy_free_stream_bufs(struct airspy *s)
357 {
358 if (s->flags & USB_STATE_URB_BUF) {
359 while (s->buf_num) {
360 s->buf_num--;
361 dev_dbg(s->dev, "free buf=%d\n", s->buf_num);
362 usb_free_coherent(s->udev, s->buf_size,
363 s->buf_list[s->buf_num],
364 s->dma_addr[s->buf_num]);
365 }
366 }
367 s->flags &= ~USB_STATE_URB_BUF;
368
369 return 0;
370 }
371
372 static int airspy_alloc_stream_bufs(struct airspy *s)
373 {
374 s->buf_num = 0;
375 s->buf_size = BULK_BUFFER_SIZE;
376
377 dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n",
378 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
379
380 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
381 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
382 BULK_BUFFER_SIZE, GFP_ATOMIC,
383 &s->dma_addr[s->buf_num]);
384 if (!s->buf_list[s->buf_num]) {
385 dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num);
386 airspy_free_stream_bufs(s);
387 return -ENOMEM;
388 }
389
390 dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num,
391 s->buf_list[s->buf_num],
392 (long long)s->dma_addr[s->buf_num]);
393 s->flags |= USB_STATE_URB_BUF;
394 }
395
396 return 0;
397 }
398
399 static int airspy_free_urbs(struct airspy *s)
400 {
401 int i;
402
403 airspy_kill_urbs(s);
404
405 for (i = s->urbs_initialized - 1; i >= 0; i--) {
406 if (s->urb_list[i]) {
407 dev_dbg(s->dev, "free urb=%d\n", i);
408 /* free the URBs */
409 usb_free_urb(s->urb_list[i]);
410 }
411 }
412 s->urbs_initialized = 0;
413
414 return 0;
415 }
416
417 static int airspy_alloc_urbs(struct airspy *s)
418 {
419 int i, j;
420
421 /* allocate the URBs */
422 for (i = 0; i < MAX_BULK_BUFS; i++) {
423 dev_dbg(s->dev, "alloc urb=%d\n", i);
424 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
425 if (!s->urb_list[i]) {
426 dev_dbg(s->dev, "failed\n");
427 for (j = 0; j < i; j++)
428 usb_free_urb(s->urb_list[j]);
429 return -ENOMEM;
430 }
431 usb_fill_bulk_urb(s->urb_list[i],
432 s->udev,
433 usb_rcvbulkpipe(s->udev, 0x81),
434 s->buf_list[i],
435 BULK_BUFFER_SIZE,
436 airspy_urb_complete, s);
437
438 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
439 s->urb_list[i]->transfer_dma = s->dma_addr[i];
440 s->urbs_initialized++;
441 }
442
443 return 0;
444 }
445
446 /* Must be called with vb_queue_lock hold */
447 static void airspy_cleanup_queued_bufs(struct airspy *s)
448 {
449 unsigned long flags;
450
451 dev_dbg(s->dev, "\n");
452
453 spin_lock_irqsave(&s->queued_bufs_lock, flags);
454 while (!list_empty(&s->queued_bufs)) {
455 struct airspy_frame_buf *buf;
456
457 buf = list_entry(s->queued_bufs.next,
458 struct airspy_frame_buf, list);
459 list_del(&buf->list);
460 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
461 }
462 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
463 }
464
465 /* The user yanked out the cable... */
466 static void airspy_disconnect(struct usb_interface *intf)
467 {
468 struct v4l2_device *v = usb_get_intfdata(intf);
469 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
470
471 dev_dbg(s->dev, "\n");
472
473 mutex_lock(&s->vb_queue_lock);
474 mutex_lock(&s->v4l2_lock);
475 /* No need to keep the urbs around after disconnection */
476 s->udev = NULL;
477 v4l2_device_disconnect(&s->v4l2_dev);
478 video_unregister_device(&s->vdev);
479 mutex_unlock(&s->v4l2_lock);
480 mutex_unlock(&s->vb_queue_lock);
481
482 v4l2_device_put(&s->v4l2_dev);
483 }
484
485 /* Videobuf2 operations */
486 static int airspy_queue_setup(struct vb2_queue *vq,
487 const struct v4l2_format *fmt, unsigned int *nbuffers,
488 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
489 {
490 struct airspy *s = vb2_get_drv_priv(vq);
491
492 dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers);
493
494 /* Need at least 8 buffers */
495 if (vq->num_buffers + *nbuffers < 8)
496 *nbuffers = 8 - vq->num_buffers;
497 *nplanes = 1;
498 sizes[0] = PAGE_ALIGN(s->buffersize);
499
500 dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
501 return 0;
502 }
503
504 static void airspy_buf_queue(struct vb2_buffer *vb)
505 {
506 struct airspy *s = vb2_get_drv_priv(vb->vb2_queue);
507 struct airspy_frame_buf *buf =
508 container_of(vb, struct airspy_frame_buf, vb);
509 unsigned long flags;
510
511 /* Check the device has not disconnected between prep and queuing */
512 if (unlikely(!s->udev)) {
513 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
514 return;
515 }
516
517 spin_lock_irqsave(&s->queued_bufs_lock, flags);
518 list_add_tail(&buf->list, &s->queued_bufs);
519 spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
520 }
521
522 static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count)
523 {
524 struct airspy *s = vb2_get_drv_priv(vq);
525 int ret;
526
527 dev_dbg(s->dev, "\n");
528
529 if (!s->udev)
530 return -ENODEV;
531
532 mutex_lock(&s->v4l2_lock);
533
534 s->sequence = 0;
535
536 set_bit(POWER_ON, &s->flags);
537
538 ret = airspy_alloc_stream_bufs(s);
539 if (ret)
540 goto err_clear_bit;
541
542 ret = airspy_alloc_urbs(s);
543 if (ret)
544 goto err_free_stream_bufs;
545
546 ret = airspy_submit_urbs(s);
547 if (ret)
548 goto err_free_urbs;
549
550 /* start hardware streaming */
551 ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0);
552 if (ret)
553 goto err_kill_urbs;
554
555 goto exit_mutex_unlock;
556
557 err_kill_urbs:
558 airspy_kill_urbs(s);
559 err_free_urbs:
560 airspy_free_urbs(s);
561 err_free_stream_bufs:
562 airspy_free_stream_bufs(s);
563 err_clear_bit:
564 clear_bit(POWER_ON, &s->flags);
565
566 /* return all queued buffers to vb2 */
567 {
568 struct airspy_frame_buf *buf, *tmp;
569
570 list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) {
571 list_del(&buf->list);
572 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
573 }
574 }
575
576 exit_mutex_unlock:
577 mutex_unlock(&s->v4l2_lock);
578
579 return ret;
580 }
581
582 static void airspy_stop_streaming(struct vb2_queue *vq)
583 {
584 struct airspy *s = vb2_get_drv_priv(vq);
585
586 dev_dbg(s->dev, "\n");
587
588 mutex_lock(&s->v4l2_lock);
589
590 /* stop hardware streaming */
591 airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0);
592
593 airspy_kill_urbs(s);
594 airspy_free_urbs(s);
595 airspy_free_stream_bufs(s);
596
597 airspy_cleanup_queued_bufs(s);
598
599 clear_bit(POWER_ON, &s->flags);
600
601 mutex_unlock(&s->v4l2_lock);
602 }
603
604 static struct vb2_ops airspy_vb2_ops = {
605 .queue_setup = airspy_queue_setup,
606 .buf_queue = airspy_buf_queue,
607 .start_streaming = airspy_start_streaming,
608 .stop_streaming = airspy_stop_streaming,
609 .wait_prepare = vb2_ops_wait_prepare,
610 .wait_finish = vb2_ops_wait_finish,
611 };
612
613 static int airspy_querycap(struct file *file, void *fh,
614 struct v4l2_capability *cap)
615 {
616 struct airspy *s = video_drvdata(file);
617
618 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
619 strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
620 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
621 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
622 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
623 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
624
625 return 0;
626 }
627
628 static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv,
629 struct v4l2_fmtdesc *f)
630 {
631 if (f->index >= NUM_FORMATS)
632 return -EINVAL;
633
634 strlcpy(f->description, formats[f->index].name, sizeof(f->description));
635 f->pixelformat = formats[f->index].pixelformat;
636
637 return 0;
638 }
639
640 static int airspy_g_fmt_sdr_cap(struct file *file, void *priv,
641 struct v4l2_format *f)
642 {
643 struct airspy *s = video_drvdata(file);
644
645 f->fmt.sdr.pixelformat = s->pixelformat;
646 f->fmt.sdr.buffersize = s->buffersize;
647 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
648
649 return 0;
650 }
651
652 static int airspy_s_fmt_sdr_cap(struct file *file, void *priv,
653 struct v4l2_format *f)
654 {
655 struct airspy *s = video_drvdata(file);
656 struct vb2_queue *q = &s->vb_queue;
657 int i;
658
659 if (vb2_is_busy(q))
660 return -EBUSY;
661
662 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
663 for (i = 0; i < NUM_FORMATS; i++) {
664 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
665 s->pixelformat = formats[i].pixelformat;
666 s->buffersize = formats[i].buffersize;
667 f->fmt.sdr.buffersize = formats[i].buffersize;
668 return 0;
669 }
670 }
671
672 s->pixelformat = formats[0].pixelformat;
673 s->buffersize = formats[0].buffersize;
674 f->fmt.sdr.pixelformat = formats[0].pixelformat;
675 f->fmt.sdr.buffersize = formats[0].buffersize;
676
677 return 0;
678 }
679
680 static int airspy_try_fmt_sdr_cap(struct file *file, void *priv,
681 struct v4l2_format *f)
682 {
683 int i;
684
685 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
686 for (i = 0; i < NUM_FORMATS; i++) {
687 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
688 f->fmt.sdr.buffersize = formats[i].buffersize;
689 return 0;
690 }
691 }
692
693 f->fmt.sdr.pixelformat = formats[0].pixelformat;
694 f->fmt.sdr.buffersize = formats[0].buffersize;
695
696 return 0;
697 }
698
699 static int airspy_s_tuner(struct file *file, void *priv,
700 const struct v4l2_tuner *v)
701 {
702 int ret;
703
704 if (v->index == 0)
705 ret = 0;
706 else if (v->index == 1)
707 ret = 0;
708 else
709 ret = -EINVAL;
710
711 return ret;
712 }
713
714 static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
715 {
716 int ret;
717
718 if (v->index == 0) {
719 strlcpy(v->name, "AirSpy ADC", sizeof(v->name));
720 v->type = V4L2_TUNER_ADC;
721 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
722 v->rangelow = bands[0].rangelow;
723 v->rangehigh = bands[0].rangehigh;
724 ret = 0;
725 } else if (v->index == 1) {
726 strlcpy(v->name, "AirSpy RF", sizeof(v->name));
727 v->type = V4L2_TUNER_RF;
728 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
729 v->rangelow = bands_rf[0].rangelow;
730 v->rangehigh = bands_rf[0].rangehigh;
731 ret = 0;
732 } else {
733 ret = -EINVAL;
734 }
735
736 return ret;
737 }
738
739 static int airspy_g_frequency(struct file *file, void *priv,
740 struct v4l2_frequency *f)
741 {
742 struct airspy *s = video_drvdata(file);
743 int ret;
744
745 if (f->tuner == 0) {
746 f->type = V4L2_TUNER_ADC;
747 f->frequency = s->f_adc;
748 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
749 ret = 0;
750 } else if (f->tuner == 1) {
751 f->type = V4L2_TUNER_RF;
752 f->frequency = s->f_rf;
753 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
754 ret = 0;
755 } else {
756 ret = -EINVAL;
757 }
758
759 return ret;
760 }
761
762 static int airspy_s_frequency(struct file *file, void *priv,
763 const struct v4l2_frequency *f)
764 {
765 struct airspy *s = video_drvdata(file);
766 int ret;
767 u8 buf[4];
768
769 if (f->tuner == 0) {
770 s->f_adc = clamp_t(unsigned int, f->frequency,
771 bands[0].rangelow,
772 bands[0].rangehigh);
773 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
774 ret = 0;
775 } else if (f->tuner == 1) {
776 s->f_rf = clamp_t(unsigned int, f->frequency,
777 bands_rf[0].rangelow,
778 bands_rf[0].rangehigh);
779 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf);
780 buf[0] = (s->f_rf >> 0) & 0xff;
781 buf[1] = (s->f_rf >> 8) & 0xff;
782 buf[2] = (s->f_rf >> 16) & 0xff;
783 buf[3] = (s->f_rf >> 24) & 0xff;
784 ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4);
785 } else {
786 ret = -EINVAL;
787 }
788
789 return ret;
790 }
791
792 static int airspy_enum_freq_bands(struct file *file, void *priv,
793 struct v4l2_frequency_band *band)
794 {
795 int ret;
796
797 if (band->tuner == 0) {
798 if (band->index >= ARRAY_SIZE(bands)) {
799 ret = -EINVAL;
800 } else {
801 *band = bands[band->index];
802 ret = 0;
803 }
804 } else if (band->tuner == 1) {
805 if (band->index >= ARRAY_SIZE(bands_rf)) {
806 ret = -EINVAL;
807 } else {
808 *band = bands_rf[band->index];
809 ret = 0;
810 }
811 } else {
812 ret = -EINVAL;
813 }
814
815 return ret;
816 }
817
818 static const struct v4l2_ioctl_ops airspy_ioctl_ops = {
819 .vidioc_querycap = airspy_querycap,
820
821 .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap,
822 .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap,
823 .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap,
824 .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap,
825
826 .vidioc_reqbufs = vb2_ioctl_reqbufs,
827 .vidioc_create_bufs = vb2_ioctl_create_bufs,
828 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
829 .vidioc_querybuf = vb2_ioctl_querybuf,
830 .vidioc_qbuf = vb2_ioctl_qbuf,
831 .vidioc_dqbuf = vb2_ioctl_dqbuf,
832
833 .vidioc_streamon = vb2_ioctl_streamon,
834 .vidioc_streamoff = vb2_ioctl_streamoff,
835
836 .vidioc_g_tuner = airspy_g_tuner,
837 .vidioc_s_tuner = airspy_s_tuner,
838
839 .vidioc_g_frequency = airspy_g_frequency,
840 .vidioc_s_frequency = airspy_s_frequency,
841 .vidioc_enum_freq_bands = airspy_enum_freq_bands,
842
843 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
844 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
845 .vidioc_log_status = v4l2_ctrl_log_status,
846 };
847
848 static const struct v4l2_file_operations airspy_fops = {
849 .owner = THIS_MODULE,
850 .open = v4l2_fh_open,
851 .release = vb2_fop_release,
852 .read = vb2_fop_read,
853 .poll = vb2_fop_poll,
854 .mmap = vb2_fop_mmap,
855 .unlocked_ioctl = video_ioctl2,
856 };
857
858 static struct video_device airspy_template = {
859 .name = "AirSpy SDR",
860 .release = video_device_release_empty,
861 .fops = &airspy_fops,
862 .ioctl_ops = &airspy_ioctl_ops,
863 };
864
865 static void airspy_video_release(struct v4l2_device *v)
866 {
867 struct airspy *s = container_of(v, struct airspy, v4l2_dev);
868
869 v4l2_ctrl_handler_free(&s->hdl);
870 v4l2_device_unregister(&s->v4l2_dev);
871 kfree(s);
872 }
873
874 static int airspy_set_lna_gain(struct airspy *s)
875 {
876 int ret;
877 u8 u8tmp;
878
879 dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n",
880 s->lna_gain_auto->cur.val, s->lna_gain_auto->val,
881 s->lna_gain->cur.val, s->lna_gain->val);
882
883 ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val,
884 &u8tmp, 1);
885 if (ret)
886 goto err;
887
888 if (s->lna_gain_auto->val == false) {
889 ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val,
890 &u8tmp, 1);
891 if (ret)
892 goto err;
893 }
894 err:
895 if (ret)
896 dev_dbg(s->dev, "failed=%d\n", ret);
897
898 return ret;
899 }
900
901 static int airspy_set_mixer_gain(struct airspy *s)
902 {
903 int ret;
904 u8 u8tmp;
905
906 dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n",
907 s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val,
908 s->mixer_gain->cur.val, s->mixer_gain->val);
909
910 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val,
911 &u8tmp, 1);
912 if (ret)
913 goto err;
914
915 if (s->mixer_gain_auto->val == false) {
916 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0,
917 s->mixer_gain->val, &u8tmp, 1);
918 if (ret)
919 goto err;
920 }
921 err:
922 if (ret)
923 dev_dbg(s->dev, "failed=%d\n", ret);
924
925 return ret;
926 }
927
928 static int airspy_set_if_gain(struct airspy *s)
929 {
930 int ret;
931 u8 u8tmp;
932
933 dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val);
934
935 ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val,
936 &u8tmp, 1);
937 if (ret)
938 goto err;
939 err:
940 if (ret)
941 dev_dbg(s->dev, "failed=%d\n", ret);
942
943 return ret;
944 }
945
946 static int airspy_s_ctrl(struct v4l2_ctrl *ctrl)
947 {
948 struct airspy *s = container_of(ctrl->handler, struct airspy, hdl);
949 int ret;
950
951 switch (ctrl->id) {
952 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
953 case V4L2_CID_RF_TUNER_LNA_GAIN:
954 ret = airspy_set_lna_gain(s);
955 break;
956 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
957 case V4L2_CID_RF_TUNER_MIXER_GAIN:
958 ret = airspy_set_mixer_gain(s);
959 break;
960 case V4L2_CID_RF_TUNER_IF_GAIN:
961 ret = airspy_set_if_gain(s);
962 break;
963 default:
964 dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n",
965 ctrl->id, ctrl->name);
966 ret = -EINVAL;
967 }
968
969 return ret;
970 }
971
972 static const struct v4l2_ctrl_ops airspy_ctrl_ops = {
973 .s_ctrl = airspy_s_ctrl,
974 };
975
976 static int airspy_probe(struct usb_interface *intf,
977 const struct usb_device_id *id)
978 {
979 struct airspy *s;
980 int ret;
981 u8 u8tmp, buf[BUF_SIZE];
982
983 s = kzalloc(sizeof(struct airspy), GFP_KERNEL);
984 if (s == NULL) {
985 dev_err(&intf->dev, "Could not allocate memory for state\n");
986 return -ENOMEM;
987 }
988
989 mutex_init(&s->v4l2_lock);
990 mutex_init(&s->vb_queue_lock);
991 spin_lock_init(&s->queued_bufs_lock);
992 INIT_LIST_HEAD(&s->queued_bufs);
993 s->dev = &intf->dev;
994 s->udev = interface_to_usbdev(intf);
995 s->f_adc = bands[0].rangelow;
996 s->f_rf = bands_rf[0].rangelow;
997 s->pixelformat = formats[0].pixelformat;
998 s->buffersize = formats[0].buffersize;
999
1000 /* Detect device */
1001 ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
1002 if (ret == 0)
1003 ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0,
1004 buf, BUF_SIZE);
1005 if (ret) {
1006 dev_err(s->dev, "Could not detect board\n");
1007 goto err_free_mem;
1008 }
1009
1010 buf[BUF_SIZE - 1] = '\0';
1011
1012 dev_info(s->dev, "Board ID: %02x\n", u8tmp);
1013 dev_info(s->dev, "Firmware version: %s\n", buf);
1014
1015 /* Init videobuf2 queue structure */
1016 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1017 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1018 s->vb_queue.drv_priv = s;
1019 s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf);
1020 s->vb_queue.ops = &airspy_vb2_ops;
1021 s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1022 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1023 ret = vb2_queue_init(&s->vb_queue);
1024 if (ret) {
1025 dev_err(s->dev, "Could not initialize vb2 queue\n");
1026 goto err_free_mem;
1027 }
1028
1029 /* Init video_device structure */
1030 s->vdev = airspy_template;
1031 s->vdev.queue = &s->vb_queue;
1032 s->vdev.queue->lock = &s->vb_queue_lock;
1033 video_set_drvdata(&s->vdev, s);
1034
1035 /* Register the v4l2_device structure */
1036 s->v4l2_dev.release = airspy_video_release;
1037 ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
1038 if (ret) {
1039 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret);
1040 goto err_free_mem;
1041 }
1042
1043 /* Register controls */
1044 v4l2_ctrl_handler_init(&s->hdl, 5);
1045 s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1046 V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0);
1047 s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1048 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8);
1049 v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
1050 s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1051 V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0);
1052 s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1053 V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8);
1054 v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
1055 s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
1056 V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0);
1057 if (s->hdl.error) {
1058 ret = s->hdl.error;
1059 dev_err(s->dev, "Could not initialize controls\n");
1060 goto err_free_controls;
1061 }
1062
1063 v4l2_ctrl_handler_setup(&s->hdl);
1064
1065 s->v4l2_dev.ctrl_handler = &s->hdl;
1066 s->vdev.v4l2_dev = &s->v4l2_dev;
1067 s->vdev.lock = &s->v4l2_lock;
1068
1069 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1070 if (ret) {
1071 dev_err(s->dev, "Failed to register as video device (%d)\n",
1072 ret);
1073 goto err_unregister_v4l2_dev;
1074 }
1075 dev_info(s->dev, "Registered as %s\n",
1076 video_device_node_name(&s->vdev));
1077 dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n");
1078 return 0;
1079
1080 err_free_controls:
1081 v4l2_ctrl_handler_free(&s->hdl);
1082 err_unregister_v4l2_dev:
1083 v4l2_device_unregister(&s->v4l2_dev);
1084 err_free_mem:
1085 kfree(s);
1086 return ret;
1087 }
1088
1089 /* USB device ID list */
1090 static struct usb_device_id airspy_id_table[] = {
1091 { USB_DEVICE(0x1d50, 0x60a1) }, /* AirSpy */
1092 { }
1093 };
1094 MODULE_DEVICE_TABLE(usb, airspy_id_table);
1095
1096 /* USB subsystem interface */
1097 static struct usb_driver airspy_driver = {
1098 .name = KBUILD_MODNAME,
1099 .probe = airspy_probe,
1100 .disconnect = airspy_disconnect,
1101 .id_table = airspy_id_table,
1102 };
1103
1104 module_usb_driver(airspy_driver);
1105
1106 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1107 MODULE_DESCRIPTION("AirSpy SDR");
1108 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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