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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_SET_TRANSCEIVER_MODE = 0x01,
29 CMD_SAMPLE_RATE_SET = 0x06,
30 CMD_BASEBAND_FILTER_BANDWIDTH_SET = 0x07,
31 CMD_BOARD_ID_READ = 0x0e,
32 CMD_VERSION_STRING_READ = 0x0f,
33 CMD_SET_FREQ = 0x10,
34 CMD_SET_LNA_GAIN = 0x13,
35 CMD_SET_VGA_GAIN = 0x14,
36};
37
38
39
40
41
42
43#define MAX_BULK_BUFS (6)
44#define BULK_BUFFER_SIZE (128 * 512)
45
46static const struct v4l2_frequency_band bands_adc[] = {
47 {
48 .tuner = 0,
49 .type = V4L2_TUNER_ADC,
50 .index = 0,
51 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
52 .rangelow = 200000,
53 .rangehigh = 24000000,
54 },
55};
56
57static const struct v4l2_frequency_band bands_rf[] = {
58 {
59 .tuner = 1,
60 .type = V4L2_TUNER_RF,
61 .index = 0,
62 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
63 .rangelow = 1,
64 .rangehigh = 4294967294LL,
65 },
66};
67
68
69struct hackrf_format {
70 char *name;
71 u32 pixelformat;
72 u32 buffersize;
73};
74
75
76static struct hackrf_format formats[] = {
77 {
78 .name = "Complex S8",
79 .pixelformat = V4L2_SDR_FMT_CS8,
80 .buffersize = BULK_BUFFER_SIZE,
81 },
82};
83
84static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
85
86
87struct hackrf_frame_buf {
88 struct vb2_buffer vb;
89 struct list_head list;
90};
91
92struct hackrf_dev {
93#define POWER_ON (1 << 1)
94#define URB_BUF (1 << 2)
95#define USB_STATE_URB_BUF (1 << 3)
96 unsigned long flags;
97
98 struct device *dev;
99 struct usb_device *udev;
100 struct video_device vdev;
101 struct v4l2_device v4l2_dev;
102
103
104 struct vb2_queue vb_queue;
105 struct list_head queued_bufs;
106 spinlock_t queued_bufs_lock;
107 unsigned sequence;
108 unsigned int vb_full;
109
110
111 struct mutex v4l2_lock;
112 struct mutex vb_queue_lock;
113
114 struct urb *urb_list[MAX_BULK_BUFS];
115 int buf_num;
116 unsigned long buf_size;
117 u8 *buf_list[MAX_BULK_BUFS];
118 dma_addr_t dma_addr[MAX_BULK_BUFS];
119 int urbs_initialized;
120 int urbs_submitted;
121
122
123 #define BUF_SIZE 24
124 u8 buf[BUF_SIZE];
125
126
127 unsigned int f_adc;
128 unsigned int f_rf;
129 u32 pixelformat;
130 u32 buffersize;
131
132
133 struct v4l2_ctrl_handler hdl;
134 struct v4l2_ctrl *bandwidth_auto;
135 struct v4l2_ctrl *bandwidth;
136 struct v4l2_ctrl *lna_gain;
137 struct v4l2_ctrl *if_gain;
138
139
140 unsigned long jiffies_next;
141 unsigned int sample;
142 unsigned int sample_measured;
143};
144
145#define hackrf_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
146 char *_direction; \
147 if (_t & USB_DIR_IN) \
148 _direction = "<<<"; \
149 else \
150 _direction = ">>>"; \
151 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
152 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, \
153 _i >> 8, _l & 0xff, _l >> 8, _direction, _l, _b); \
154}
155
156
157static int hackrf_ctrl_msg(struct hackrf_dev *dev, u8 request, u16 value,
158 u16 index, u8 *data, u16 size)
159{
160 int ret;
161 unsigned int pipe;
162 u8 requesttype;
163
164 switch (request) {
165 case CMD_SET_TRANSCEIVER_MODE:
166 case CMD_SET_FREQ:
167 case CMD_SAMPLE_RATE_SET:
168 case CMD_BASEBAND_FILTER_BANDWIDTH_SET:
169 pipe = usb_sndctrlpipe(dev->udev, 0);
170 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
171 break;
172 case CMD_BOARD_ID_READ:
173 case CMD_VERSION_STRING_READ:
174 case CMD_SET_LNA_GAIN:
175 case CMD_SET_VGA_GAIN:
176 pipe = usb_rcvctrlpipe(dev->udev, 0);
177 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
178 break;
179 default:
180 dev_err(dev->dev, "Unknown command %02x\n", request);
181 ret = -EINVAL;
182 goto err;
183 }
184
185
186 if (!(requesttype & USB_DIR_IN))
187 memcpy(dev->buf, data, size);
188
189 ret = usb_control_msg(dev->udev, pipe, request, requesttype, value,
190 index, dev->buf, size, 1000);
191 hackrf_dbg_usb_control_msg(dev->dev, request, requesttype, value,
192 index, dev->buf, size);
193 if (ret < 0) {
194 dev_err(dev->dev, "usb_control_msg() failed %d request %02x\n",
195 ret, request);
196 goto err;
197 }
198
199
200 if (requesttype & USB_DIR_IN)
201 memcpy(data, dev->buf, size);
202
203 return 0;
204err:
205 return ret;
206}
207
208
209static struct hackrf_frame_buf *hackrf_get_next_fill_buf(struct hackrf_dev *dev)
210{
211 unsigned long flags;
212 struct hackrf_frame_buf *buf = NULL;
213
214 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
215 if (list_empty(&dev->queued_bufs))
216 goto leave;
217
218 buf = list_entry(dev->queued_bufs.next, struct hackrf_frame_buf, list);
219 list_del(&buf->list);
220leave:
221 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
222 return buf;
223}
224
225static unsigned int hackrf_convert_stream(struct hackrf_dev *dev,
226 void *dst, void *src, unsigned int src_len)
227{
228 memcpy(dst, src, src_len);
229
230
231 if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
232 #define MSECS 10000UL
233 unsigned int msecs = jiffies_to_msecs(jiffies -
234 dev->jiffies_next + msecs_to_jiffies(MSECS));
235 unsigned int samples = dev->sample - dev->sample_measured;
236
237 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
238 dev->sample_measured = dev->sample;
239 dev_dbg(dev->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n",
240 src_len, samples, msecs,
241 samples * 1000UL / msecs);
242 }
243
244
245 dev->sample += src_len / 2;
246
247 return src_len;
248}
249
250
251
252
253
254static void hackrf_urb_complete(struct urb *urb)
255{
256 struct hackrf_dev *dev = urb->context;
257 struct hackrf_frame_buf *fbuf;
258
259 dev_dbg_ratelimited(dev->dev, "status=%d length=%d/%d errors=%d\n",
260 urb->status, urb->actual_length,
261 urb->transfer_buffer_length, urb->error_count);
262
263 switch (urb->status) {
264 case 0:
265 case -ETIMEDOUT:
266 break;
267 case -ECONNRESET:
268 case -ENOENT:
269 case -ESHUTDOWN:
270 return;
271 default:
272 dev_err_ratelimited(dev->dev, "URB failed %d\n", urb->status);
273 break;
274 }
275
276 if (likely(urb->actual_length > 0)) {
277 void *ptr;
278 unsigned int len;
279
280 fbuf = hackrf_get_next_fill_buf(dev);
281 if (unlikely(fbuf == NULL)) {
282 dev->vb_full++;
283 dev_notice_ratelimited(dev->dev,
284 "videobuf is full, %d packets dropped\n",
285 dev->vb_full);
286 goto skip;
287 }
288
289
290 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
291 len = hackrf_convert_stream(dev, ptr, urb->transfer_buffer,
292 urb->actual_length);
293 vb2_set_plane_payload(&fbuf->vb, 0, len);
294 v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
295 fbuf->vb.v4l2_buf.sequence = dev->sequence++;
296 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
297 }
298skip:
299 usb_submit_urb(urb, GFP_ATOMIC);
300}
301
302static int hackrf_kill_urbs(struct hackrf_dev *dev)
303{
304 int i;
305
306 for (i = dev->urbs_submitted - 1; i >= 0; i--) {
307 dev_dbg(dev->dev, "kill urb=%d\n", i);
308
309 usb_kill_urb(dev->urb_list[i]);
310 }
311 dev->urbs_submitted = 0;
312
313 return 0;
314}
315
316static int hackrf_submit_urbs(struct hackrf_dev *dev)
317{
318 int i, ret;
319
320 for (i = 0; i < dev->urbs_initialized; i++) {
321 dev_dbg(dev->dev, "submit urb=%d\n", i);
322 ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC);
323 if (ret) {
324 dev_err(dev->dev, "Could not submit URB no. %d - get them all back\n",
325 i);
326 hackrf_kill_urbs(dev);
327 return ret;
328 }
329 dev->urbs_submitted++;
330 }
331
332 return 0;
333}
334
335static int hackrf_free_stream_bufs(struct hackrf_dev *dev)
336{
337 if (dev->flags & USB_STATE_URB_BUF) {
338 while (dev->buf_num) {
339 dev->buf_num--;
340 dev_dbg(dev->dev, "free buf=%d\n", dev->buf_num);
341 usb_free_coherent(dev->udev, dev->buf_size,
342 dev->buf_list[dev->buf_num],
343 dev->dma_addr[dev->buf_num]);
344 }
345 }
346 dev->flags &= ~USB_STATE_URB_BUF;
347
348 return 0;
349}
350
351static int hackrf_alloc_stream_bufs(struct hackrf_dev *dev)
352{
353 dev->buf_num = 0;
354 dev->buf_size = BULK_BUFFER_SIZE;
355
356 dev_dbg(dev->dev, "all in all I will use %u bytes for streaming\n",
357 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
358
359 for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
360 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
361 BULK_BUFFER_SIZE, GFP_ATOMIC,
362 &dev->dma_addr[dev->buf_num]);
363 if (!dev->buf_list[dev->buf_num]) {
364 dev_dbg(dev->dev, "alloc buf=%d failed\n",
365 dev->buf_num);
366 hackrf_free_stream_bufs(dev);
367 return -ENOMEM;
368 }
369
370 dev_dbg(dev->dev, "alloc buf=%d %p (dma %llu)\n", dev->buf_num,
371 dev->buf_list[dev->buf_num],
372 (long long)dev->dma_addr[dev->buf_num]);
373 dev->flags |= USB_STATE_URB_BUF;
374 }
375
376 return 0;
377}
378
379static int hackrf_free_urbs(struct hackrf_dev *dev)
380{
381 int i;
382
383 hackrf_kill_urbs(dev);
384
385 for (i = dev->urbs_initialized - 1; i >= 0; i--) {
386 if (dev->urb_list[i]) {
387 dev_dbg(dev->dev, "free urb=%d\n", i);
388
389 usb_free_urb(dev->urb_list[i]);
390 }
391 }
392 dev->urbs_initialized = 0;
393
394 return 0;
395}
396
397static int hackrf_alloc_urbs(struct hackrf_dev *dev)
398{
399 int i, j;
400
401
402 for (i = 0; i < MAX_BULK_BUFS; i++) {
403 dev_dbg(dev->dev, "alloc urb=%d\n", i);
404 dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
405 if (!dev->urb_list[i]) {
406 dev_dbg(dev->dev, "failed\n");
407 for (j = 0; j < i; j++)
408 usb_free_urb(dev->urb_list[j]);
409 return -ENOMEM;
410 }
411 usb_fill_bulk_urb(dev->urb_list[i],
412 dev->udev,
413 usb_rcvbulkpipe(dev->udev, 0x81),
414 dev->buf_list[i],
415 BULK_BUFFER_SIZE,
416 hackrf_urb_complete, dev);
417
418 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
419 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
420 dev->urbs_initialized++;
421 }
422
423 return 0;
424}
425
426
427static void hackrf_cleanup_queued_bufs(struct hackrf_dev *dev)
428{
429 unsigned long flags;
430
431 dev_dbg(dev->dev, "\n");
432
433 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
434 while (!list_empty(&dev->queued_bufs)) {
435 struct hackrf_frame_buf *buf;
436
437 buf = list_entry(dev->queued_bufs.next,
438 struct hackrf_frame_buf, list);
439 list_del(&buf->list);
440 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
441 }
442 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
443}
444
445
446static void hackrf_disconnect(struct usb_interface *intf)
447{
448 struct v4l2_device *v = usb_get_intfdata(intf);
449 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev);
450
451 dev_dbg(dev->dev, "\n");
452
453 mutex_lock(&dev->vb_queue_lock);
454 mutex_lock(&dev->v4l2_lock);
455
456 dev->udev = NULL;
457 v4l2_device_disconnect(&dev->v4l2_dev);
458 video_unregister_device(&dev->vdev);
459 mutex_unlock(&dev->v4l2_lock);
460 mutex_unlock(&dev->vb_queue_lock);
461
462 v4l2_device_put(&dev->v4l2_dev);
463}
464
465
466static int hackrf_queue_setup(struct vb2_queue *vq,
467 const struct v4l2_format *fmt, unsigned int *nbuffers,
468 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
469{
470 struct hackrf_dev *dev = vb2_get_drv_priv(vq);
471
472 dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
473
474
475 if (vq->num_buffers + *nbuffers < 8)
476 *nbuffers = 8 - vq->num_buffers;
477 *nplanes = 1;
478 sizes[0] = PAGE_ALIGN(dev->buffersize);
479
480 dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
481 return 0;
482}
483
484static void hackrf_buf_queue(struct vb2_buffer *vb)
485{
486 struct hackrf_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
487 struct hackrf_frame_buf *buf =
488 container_of(vb, struct hackrf_frame_buf, vb);
489 unsigned long flags;
490
491 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
492 list_add_tail(&buf->list, &dev->queued_bufs);
493 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
494}
495
496static int hackrf_start_streaming(struct vb2_queue *vq, unsigned int count)
497{
498 struct hackrf_dev *dev = vb2_get_drv_priv(vq);
499 int ret;
500
501 dev_dbg(dev->dev, "\n");
502
503 if (!dev->udev)
504 return -ENODEV;
505
506 mutex_lock(&dev->v4l2_lock);
507
508 dev->sequence = 0;
509
510 set_bit(POWER_ON, &dev->flags);
511
512 ret = hackrf_alloc_stream_bufs(dev);
513 if (ret)
514 goto err;
515
516 ret = hackrf_alloc_urbs(dev);
517 if (ret)
518 goto err;
519
520 ret = hackrf_submit_urbs(dev);
521 if (ret)
522 goto err;
523
524
525 ret = hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 1, 0, NULL, 0);
526 if (ret)
527 goto err;
528
529 goto exit_mutex_unlock;
530err:
531 hackrf_kill_urbs(dev);
532 hackrf_free_urbs(dev);
533 hackrf_free_stream_bufs(dev);
534 clear_bit(POWER_ON, &dev->flags);
535
536
537 {
538 struct hackrf_frame_buf *buf, *tmp;
539
540 list_for_each_entry_safe(buf, tmp, &dev->queued_bufs, list) {
541 list_del(&buf->list);
542 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
543 }
544 }
545
546exit_mutex_unlock:
547 mutex_unlock(&dev->v4l2_lock);
548
549 return ret;
550}
551
552static void hackrf_stop_streaming(struct vb2_queue *vq)
553{
554 struct hackrf_dev *dev = vb2_get_drv_priv(vq);
555
556 dev_dbg(dev->dev, "\n");
557
558 mutex_lock(&dev->v4l2_lock);
559
560
561 hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 0, 0, NULL, 0);
562
563 hackrf_kill_urbs(dev);
564 hackrf_free_urbs(dev);
565 hackrf_free_stream_bufs(dev);
566
567 hackrf_cleanup_queued_bufs(dev);
568
569 clear_bit(POWER_ON, &dev->flags);
570
571 mutex_unlock(&dev->v4l2_lock);
572}
573
574static struct vb2_ops hackrf_vb2_ops = {
575 .queue_setup = hackrf_queue_setup,
576 .buf_queue = hackrf_buf_queue,
577 .start_streaming = hackrf_start_streaming,
578 .stop_streaming = hackrf_stop_streaming,
579 .wait_prepare = vb2_ops_wait_prepare,
580 .wait_finish = vb2_ops_wait_finish,
581};
582
583static int hackrf_querycap(struct file *file, void *fh,
584 struct v4l2_capability *cap)
585{
586 struct hackrf_dev *dev = video_drvdata(file);
587
588 dev_dbg(dev->dev, "\n");
589
590 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
591 strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
592 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
593 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
594 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
595 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
596
597 return 0;
598}
599
600static int hackrf_s_fmt_sdr_cap(struct file *file, void *priv,
601 struct v4l2_format *f)
602{
603 struct hackrf_dev *dev = video_drvdata(file);
604 struct vb2_queue *q = &dev->vb_queue;
605 int i;
606
607 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
608 (char *)&f->fmt.sdr.pixelformat);
609
610 if (vb2_is_busy(q))
611 return -EBUSY;
612
613 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
614 for (i = 0; i < NUM_FORMATS; i++) {
615 if (f->fmt.sdr.pixelformat == formats[i].pixelformat) {
616 dev->pixelformat = formats[i].pixelformat;
617 dev->buffersize = formats[i].buffersize;
618 f->fmt.sdr.buffersize = formats[i].buffersize;
619 return 0;
620 }
621 }
622
623 dev->pixelformat = formats[0].pixelformat;
624 dev->buffersize = formats[0].buffersize;
625 f->fmt.sdr.pixelformat = formats[0].pixelformat;
626 f->fmt.sdr.buffersize = formats[0].buffersize;
627
628 return 0;
629}
630
631static int hackrf_g_fmt_sdr_cap(struct file *file, void *priv,
632 struct v4l2_format *f)
633{
634 struct hackrf_dev *dev = video_drvdata(file);
635
636 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
637 (char *)&dev->pixelformat);
638
639 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
640 f->fmt.sdr.pixelformat = dev->pixelformat;
641 f->fmt.sdr.buffersize = dev->buffersize;
642
643 return 0;
644}
645
646static int hackrf_try_fmt_sdr_cap(struct file *file, void *priv,
647 struct v4l2_format *f)
648{
649 struct hackrf_dev *dev = video_drvdata(file);
650 int i;
651
652 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
653 (char *)&f->fmt.sdr.pixelformat);
654
655 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
656 for (i = 0; i < NUM_FORMATS; i++) {
657 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
658 f->fmt.sdr.buffersize = formats[i].buffersize;
659 return 0;
660 }
661 }
662
663 f->fmt.sdr.pixelformat = formats[0].pixelformat;
664 f->fmt.sdr.buffersize = formats[0].buffersize;
665
666 return 0;
667}
668
669static int hackrf_enum_fmt_sdr_cap(struct file *file, void *priv,
670 struct v4l2_fmtdesc *f)
671{
672 struct hackrf_dev *dev = video_drvdata(file);
673
674 dev_dbg(dev->dev, "index=%d\n", f->index);
675
676 if (f->index >= NUM_FORMATS)
677 return -EINVAL;
678
679 strlcpy(f->description, formats[f->index].name, sizeof(f->description));
680 f->pixelformat = formats[f->index].pixelformat;
681
682 return 0;
683}
684
685static int hackrf_s_tuner(struct file *file, void *priv,
686 const struct v4l2_tuner *v)
687{
688 struct hackrf_dev *dev = video_drvdata(file);
689 int ret;
690
691 dev_dbg(dev->dev, "index=%d\n", v->index);
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
703static int hackrf_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
704{
705 struct hackrf_dev *dev = video_drvdata(file);
706 int ret;
707
708 dev_dbg(dev->dev, "index=%d\n", v->index);
709
710 if (v->index == 0) {
711 strlcpy(v->name, "HackRF ADC", sizeof(v->name));
712 v->type = V4L2_TUNER_ADC;
713 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
714 v->rangelow = bands_adc[0].rangelow;
715 v->rangehigh = bands_adc[0].rangehigh;
716 ret = 0;
717 } else if (v->index == 1) {
718 strlcpy(v->name, "HackRF RF", sizeof(v->name));
719 v->type = V4L2_TUNER_RF;
720 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
721 v->rangelow = bands_rf[0].rangelow;
722 v->rangehigh = bands_rf[0].rangehigh;
723 ret = 0;
724 } else {
725 ret = -EINVAL;
726 }
727
728 return ret;
729}
730
731static int hackrf_s_frequency(struct file *file, void *priv,
732 const struct v4l2_frequency *f)
733{
734 struct hackrf_dev *dev = video_drvdata(file);
735 int ret;
736 unsigned int upper, lower;
737 u8 buf[8];
738
739 dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
740 f->tuner, f->type, f->frequency);
741
742 if (f->tuner == 0) {
743 dev->f_adc = clamp_t(unsigned int, f->frequency,
744 bands_adc[0].rangelow, bands_adc[0].rangehigh);
745 dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
746 upper = dev->f_adc;
747 lower = 1;
748 buf[0] = (upper >> 0) & 0xff;
749 buf[1] = (upper >> 8) & 0xff;
750 buf[2] = (upper >> 16) & 0xff;
751 buf[3] = (upper >> 24) & 0xff;
752 buf[4] = (lower >> 0) & 0xff;
753 buf[5] = (lower >> 8) & 0xff;
754 buf[6] = (lower >> 16) & 0xff;
755 buf[7] = (lower >> 24) & 0xff;
756 ret = hackrf_ctrl_msg(dev, CMD_SAMPLE_RATE_SET, 0, 0, buf, 8);
757 } else if (f->tuner == 1) {
758 dev->f_rf = clamp_t(unsigned int, f->frequency,
759 bands_rf[0].rangelow, bands_rf[0].rangehigh);
760 dev_dbg(dev->dev, "RF frequency=%u Hz\n", dev->f_rf);
761 upper = dev->f_rf / 1000000;
762 lower = dev->f_rf % 1000000;
763 buf[0] = (upper >> 0) & 0xff;
764 buf[1] = (upper >> 8) & 0xff;
765 buf[2] = (upper >> 16) & 0xff;
766 buf[3] = (upper >> 24) & 0xff;
767 buf[4] = (lower >> 0) & 0xff;
768 buf[5] = (lower >> 8) & 0xff;
769 buf[6] = (lower >> 16) & 0xff;
770 buf[7] = (lower >> 24) & 0xff;
771 ret = hackrf_ctrl_msg(dev, CMD_SET_FREQ, 0, 0, buf, 8);
772 } else {
773 ret = -EINVAL;
774 }
775
776 return ret;
777}
778
779static int hackrf_g_frequency(struct file *file, void *priv,
780 struct v4l2_frequency *f)
781{
782 struct hackrf_dev *dev = video_drvdata(file);
783 int ret;
784
785 dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
786
787 if (f->tuner == 0) {
788 f->type = V4L2_TUNER_ADC;
789 f->frequency = dev->f_adc;
790 ret = 0;
791 } else if (f->tuner == 1) {
792 f->type = V4L2_TUNER_RF;
793 f->frequency = dev->f_rf;
794 ret = 0;
795 } else {
796 ret = -EINVAL;
797 }
798
799 return ret;
800}
801
802static int hackrf_enum_freq_bands(struct file *file, void *priv,
803 struct v4l2_frequency_band *band)
804{
805 struct hackrf_dev *dev = video_drvdata(file);
806 int ret;
807
808 dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
809 band->tuner, band->type, band->index);
810
811 if (band->tuner == 0) {
812 if (band->index >= ARRAY_SIZE(bands_adc)) {
813 ret = -EINVAL;
814 } else {
815 *band = bands_adc[band->index];
816 ret = 0;
817 }
818 } else if (band->tuner == 1) {
819 if (band->index >= ARRAY_SIZE(bands_rf)) {
820 ret = -EINVAL;
821 } else {
822 *band = bands_rf[band->index];
823 ret = 0;
824 }
825 } else {
826 ret = -EINVAL;
827 }
828
829 return ret;
830}
831
832static const struct v4l2_ioctl_ops hackrf_ioctl_ops = {
833 .vidioc_querycap = hackrf_querycap,
834
835 .vidioc_s_fmt_sdr_cap = hackrf_s_fmt_sdr_cap,
836 .vidioc_g_fmt_sdr_cap = hackrf_g_fmt_sdr_cap,
837 .vidioc_enum_fmt_sdr_cap = hackrf_enum_fmt_sdr_cap,
838 .vidioc_try_fmt_sdr_cap = hackrf_try_fmt_sdr_cap,
839
840 .vidioc_reqbufs = vb2_ioctl_reqbufs,
841 .vidioc_create_bufs = vb2_ioctl_create_bufs,
842 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
843 .vidioc_querybuf = vb2_ioctl_querybuf,
844 .vidioc_qbuf = vb2_ioctl_qbuf,
845 .vidioc_dqbuf = vb2_ioctl_dqbuf,
846
847 .vidioc_streamon = vb2_ioctl_streamon,
848 .vidioc_streamoff = vb2_ioctl_streamoff,
849
850 .vidioc_s_tuner = hackrf_s_tuner,
851 .vidioc_g_tuner = hackrf_g_tuner,
852
853 .vidioc_s_frequency = hackrf_s_frequency,
854 .vidioc_g_frequency = hackrf_g_frequency,
855 .vidioc_enum_freq_bands = hackrf_enum_freq_bands,
856
857 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
858 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
859 .vidioc_log_status = v4l2_ctrl_log_status,
860};
861
862static const struct v4l2_file_operations hackrf_fops = {
863 .owner = THIS_MODULE,
864 .open = v4l2_fh_open,
865 .release = vb2_fop_release,
866 .read = vb2_fop_read,
867 .poll = vb2_fop_poll,
868 .mmap = vb2_fop_mmap,
869 .unlocked_ioctl = video_ioctl2,
870};
871
872static struct video_device hackrf_template = {
873 .name = "HackRF One",
874 .release = video_device_release_empty,
875 .fops = &hackrf_fops,
876 .ioctl_ops = &hackrf_ioctl_ops,
877};
878
879static void hackrf_video_release(struct v4l2_device *v)
880{
881 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev);
882
883 v4l2_ctrl_handler_free(&dev->hdl);
884 v4l2_device_unregister(&dev->v4l2_dev);
885 kfree(dev);
886}
887
888static int hackrf_set_bandwidth(struct hackrf_dev *dev)
889{
890 int ret, i;
891 u16 u16tmp, u16tmp2;
892 unsigned int bandwidth;
893
894 static const struct {
895 u32 freq;
896 } bandwidth_lut[] = {
897 { 1750000},
898 { 2500000},
899 { 3500000},
900 { 5000000},
901 { 5500000},
902 { 6000000},
903 { 7000000},
904 { 8000000},
905 { 9000000},
906 {10000000},
907 {12000000},
908 {14000000},
909 {15000000},
910 {20000000},
911 {24000000},
912 {28000000},
913 };
914
915 dev_dbg(dev->dev, "bandwidth auto=%d->%d val=%d->%d f_adc=%u\n",
916 dev->bandwidth_auto->cur.val,
917 dev->bandwidth_auto->val, dev->bandwidth->cur.val,
918 dev->bandwidth->val, dev->f_adc);
919
920 if (dev->bandwidth_auto->val == true)
921 bandwidth = dev->f_adc;
922 else
923 bandwidth = dev->bandwidth->val;
924
925 for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) {
926 if (bandwidth <= bandwidth_lut[i].freq) {
927 bandwidth = bandwidth_lut[i].freq;
928 break;
929 }
930 }
931
932 dev->bandwidth->val = bandwidth;
933 dev->bandwidth->cur.val = bandwidth;
934
935 dev_dbg(dev->dev, "bandwidth selected=%d\n", bandwidth);
936
937 u16tmp = 0;
938 u16tmp |= ((bandwidth >> 0) & 0xff) << 0;
939 u16tmp |= ((bandwidth >> 8) & 0xff) << 8;
940 u16tmp2 = 0;
941 u16tmp2 |= ((bandwidth >> 16) & 0xff) << 0;
942 u16tmp2 |= ((bandwidth >> 24) & 0xff) << 8;
943
944 ret = hackrf_ctrl_msg(dev, CMD_BASEBAND_FILTER_BANDWIDTH_SET,
945 u16tmp, u16tmp2, NULL, 0);
946 if (ret)
947 dev_dbg(dev->dev, "failed=%d\n", ret);
948
949 return ret;
950}
951
952static int hackrf_set_lna_gain(struct hackrf_dev *dev)
953{
954 int ret;
955 u8 u8tmp;
956
957 dev_dbg(dev->dev, "lna val=%d->%d\n",
958 dev->lna_gain->cur.val, dev->lna_gain->val);
959
960 ret = hackrf_ctrl_msg(dev, CMD_SET_LNA_GAIN, 0, dev->lna_gain->val,
961 &u8tmp, 1);
962 if (ret)
963 dev_dbg(dev->dev, "failed=%d\n", ret);
964
965 return ret;
966}
967
968static int hackrf_set_if_gain(struct hackrf_dev *dev)
969{
970 int ret;
971 u8 u8tmp;
972
973 dev_dbg(dev->dev, "val=%d->%d\n",
974 dev->if_gain->cur.val, dev->if_gain->val);
975
976 ret = hackrf_ctrl_msg(dev, CMD_SET_VGA_GAIN, 0, dev->if_gain->val,
977 &u8tmp, 1);
978 if (ret)
979 dev_dbg(dev->dev, "failed=%d\n", ret);
980
981 return ret;
982}
983
984static int hackrf_s_ctrl(struct v4l2_ctrl *ctrl)
985{
986 struct hackrf_dev *dev = container_of(ctrl->handler,
987 struct hackrf_dev, hdl);
988 int ret;
989
990 switch (ctrl->id) {
991 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
992 case V4L2_CID_RF_TUNER_BANDWIDTH:
993 ret = hackrf_set_bandwidth(dev);
994 break;
995 case V4L2_CID_RF_TUNER_LNA_GAIN:
996 ret = hackrf_set_lna_gain(dev);
997 break;
998 case V4L2_CID_RF_TUNER_IF_GAIN:
999 ret = hackrf_set_if_gain(dev);
1000 break;
1001 default:
1002 dev_dbg(dev->dev, "unknown ctrl: id=%d name=%s\n",
1003 ctrl->id, ctrl->name);
1004 ret = -EINVAL;
1005 }
1006
1007 return ret;
1008}
1009
1010static const struct v4l2_ctrl_ops hackrf_ctrl_ops = {
1011 .s_ctrl = hackrf_s_ctrl,
1012};
1013
1014static int hackrf_probe(struct usb_interface *intf,
1015 const struct usb_device_id *id)
1016{
1017 struct hackrf_dev *dev;
1018 int ret;
1019 u8 u8tmp, buf[BUF_SIZE];
1020
1021 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1022 if (dev == NULL)
1023 return -ENOMEM;
1024
1025 mutex_init(&dev->v4l2_lock);
1026 mutex_init(&dev->vb_queue_lock);
1027 spin_lock_init(&dev->queued_bufs_lock);
1028 INIT_LIST_HEAD(&dev->queued_bufs);
1029 dev->dev = &intf->dev;
1030 dev->udev = interface_to_usbdev(intf);
1031 dev->f_adc = bands_adc[0].rangelow;
1032 dev->f_rf = bands_rf[0].rangelow;
1033 dev->pixelformat = formats[0].pixelformat;
1034 dev->buffersize = formats[0].buffersize;
1035
1036
1037 ret = hackrf_ctrl_msg(dev, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
1038 if (ret == 0)
1039 ret = hackrf_ctrl_msg(dev, CMD_VERSION_STRING_READ, 0, 0,
1040 buf, BUF_SIZE);
1041 if (ret) {
1042 dev_err(dev->dev, "Could not detect board\n");
1043 goto err_free_mem;
1044 }
1045
1046 buf[BUF_SIZE - 1] = '\0';
1047
1048 dev_info(dev->dev, "Board ID: %02x\n", u8tmp);
1049 dev_info(dev->dev, "Firmware version: %s\n", buf);
1050
1051
1052 dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1053 dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1054 dev->vb_queue.drv_priv = dev;
1055 dev->vb_queue.buf_struct_size = sizeof(struct hackrf_frame_buf);
1056 dev->vb_queue.ops = &hackrf_vb2_ops;
1057 dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1058 dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1059 ret = vb2_queue_init(&dev->vb_queue);
1060 if (ret) {
1061 dev_err(dev->dev, "Could not initialize vb2 queue\n");
1062 goto err_free_mem;
1063 }
1064
1065
1066 dev->vdev = hackrf_template;
1067 dev->vdev.queue = &dev->vb_queue;
1068 dev->vdev.queue->lock = &dev->vb_queue_lock;
1069 video_set_drvdata(&dev->vdev, dev);
1070
1071
1072 dev->v4l2_dev.release = hackrf_video_release;
1073 ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1074 if (ret) {
1075 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
1076 goto err_free_mem;
1077 }
1078
1079
1080 v4l2_ctrl_handler_init(&dev->hdl, 4);
1081 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
1082 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
1083 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
1084 V4L2_CID_RF_TUNER_BANDWIDTH,
1085 1750000, 28000000, 50000, 1750000);
1086 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1087 dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
1088 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0);
1089 dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
1090 V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0);
1091 if (dev->hdl.error) {
1092 ret = dev->hdl.error;
1093 dev_err(dev->dev, "Could not initialize controls\n");
1094 goto err_free_controls;
1095 }
1096
1097 v4l2_ctrl_handler_setup(&dev->hdl);
1098
1099 dev->v4l2_dev.ctrl_handler = &dev->hdl;
1100 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1101 dev->vdev.lock = &dev->v4l2_lock;
1102
1103 ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1104 if (ret) {
1105 dev_err(dev->dev, "Failed to register as video device (%d)\n",
1106 ret);
1107 goto err_unregister_v4l2_dev;
1108 }
1109 dev_info(dev->dev, "Registered as %s\n",
1110 video_device_node_name(&dev->vdev));
1111 dev_notice(dev->dev, "SDR API is still slightly experimental and functionality changes may follow\n");
1112 return 0;
1113
1114err_free_controls:
1115 v4l2_ctrl_handler_free(&dev->hdl);
1116err_unregister_v4l2_dev:
1117 v4l2_device_unregister(&dev->v4l2_dev);
1118err_free_mem:
1119 kfree(dev);
1120 return ret;
1121}
1122
1123
1124static struct usb_device_id hackrf_id_table[] = {
1125 { USB_DEVICE(0x1d50, 0x6089) },
1126 { }
1127};
1128MODULE_DEVICE_TABLE(usb, hackrf_id_table);
1129
1130
1131static struct usb_driver hackrf_driver = {
1132 .name = KBUILD_MODNAME,
1133 .probe = hackrf_probe,
1134 .disconnect = hackrf_disconnect,
1135 .id_table = hackrf_id_table,
1136};
1137
1138module_usb_driver(hackrf_driver);
1139
1140MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1141MODULE_DESCRIPTION("HackRF");
1142MODULE_LICENSE("GPL");
1143
