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 char *name; 75 u32 pixelformat; 76 u32 buffersize; 77 }; 78 79 /* format descriptions for capture and preview */ 80 static struct airspy_format formats[] = { 81 { 82 .name = "Real U12LE", 83 .pixelformat = V4L2_SDR_FMT_RU12LE, 84 .buffersize = BULK_BUFFER_SIZE, 85 }, 86 }; 87 88 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); 89 90 /* intermediate buffers with raw data from the USB device */ 91 struct airspy_frame_buf { 92 /* common v4l buffer stuff -- must be first */ 93 struct vb2_v4l2_buffer vb; 94 struct list_head list; 95 }; 96 97 struct airspy { 98 #define POWER_ON 1 99 #define USB_STATE_URB_BUF 2 100 unsigned long flags; 101 102 struct device *dev; 103 struct usb_device *udev; 104 struct video_device vdev; 105 struct v4l2_device v4l2_dev; 106 107 /* videobuf2 queue and queued buffers list */ 108 struct vb2_queue vb_queue; 109 struct list_head queued_bufs; 110 spinlock_t queued_bufs_lock; /* Protects queued_bufs */ 111 unsigned sequence; /* Buffer sequence counter */ 112 unsigned int vb_full; /* vb is full and packets dropped */ 113 114 /* Note if taking both locks v4l2_lock must always be locked first! */ 115 struct mutex v4l2_lock; /* Protects everything else */ 116 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */ 117 118 struct urb *urb_list[MAX_BULK_BUFS]; 119 int buf_num; 120 unsigned long buf_size; 121 u8 *buf_list[MAX_BULK_BUFS]; 122 dma_addr_t dma_addr[MAX_BULK_BUFS]; 123 int urbs_initialized; 124 int urbs_submitted; 125 126 /* USB control message buffer */ 127 #define BUF_SIZE 128 128 u8 buf[BUF_SIZE]; 129 130 /* Current configuration */ 131 unsigned int f_adc; 132 unsigned int f_rf; 133 u32 pixelformat; 134 u32 buffersize; 135 136 /* Controls */ 137 struct v4l2_ctrl_handler hdl; 138 struct v4l2_ctrl *lna_gain_auto; 139 struct v4l2_ctrl *lna_gain; 140 struct v4l2_ctrl *mixer_gain_auto; 141 struct v4l2_ctrl *mixer_gain; 142 struct v4l2_ctrl *if_gain; 143 144 /* Sample rate calc */ 145 unsigned long jiffies_next; 146 unsigned int sample; 147 unsigned int sample_measured; 148 }; 149 150 #define airspy_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \ 151 char *_direction; \ 152 if (_t & USB_DIR_IN) \ 153 _direction = "<<<"; \ 154 else \ 155 _direction = ">>>"; \ 156 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \ 157 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \ 158 _l & 0xff, _l >> 8, _direction, _l, _b); \ 159 } 160 161 /* execute firmware command */ 162 static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index, 163 u8 *data, u16 size) 164 { 165 int ret; 166 unsigned int pipe; 167 u8 requesttype; 168 169 switch (request) { 170 case CMD_RECEIVER_MODE: 171 case CMD_SET_FREQ: 172 pipe = usb_sndctrlpipe(s->udev, 0); 173 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT); 174 break; 175 case CMD_BOARD_ID_READ: 176 case CMD_VERSION_STRING_READ: 177 case CMD_BOARD_PARTID_SERIALNO_READ: 178 case CMD_SET_LNA_GAIN: 179 case CMD_SET_MIXER_GAIN: 180 case CMD_SET_VGA_GAIN: 181 case CMD_SET_LNA_AGC: 182 case CMD_SET_MIXER_AGC: 183 pipe = usb_rcvctrlpipe(s->udev, 0); 184 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN); 185 break; 186 default: 187 dev_err(s->dev, "Unknown command %02x\n", request); 188 ret = -EINVAL; 189 goto err; 190 } 191 192 /* write request */ 193 if (!(requesttype & USB_DIR_IN)) 194 memcpy(s->buf, data, size); 195 196 ret = usb_control_msg(s->udev, pipe, request, requesttype, value, 197 index, s->buf, size, 1000); 198 airspy_dbg_usb_control_msg(s->dev, request, requesttype, value, 199 index, s->buf, size); 200 if (ret < 0) { 201 dev_err(s->dev, "usb_control_msg() failed %d request %02x\n", 202 ret, request); 203 goto err; 204 } 205 206 /* read request */ 207 if (requesttype & USB_DIR_IN) 208 memcpy(data, s->buf, size); 209 210 return 0; 211 err: 212 return ret; 213 } 214 215 /* Private functions */ 216 static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s) 217 { 218 unsigned long flags; 219 struct airspy_frame_buf *buf = NULL; 220 221 spin_lock_irqsave(&s->queued_bufs_lock, flags); 222 if (list_empty(&s->queued_bufs)) 223 goto leave; 224 225 buf = list_entry(s->queued_bufs.next, 226 struct airspy_frame_buf, list); 227 list_del(&buf->list); 228 leave: 229 spin_unlock_irqrestore(&s->queued_bufs_lock, flags); 230 return buf; 231 } 232 233 static unsigned int airspy_convert_stream(struct airspy *s, 234 void *dst, void *src, unsigned int src_len) 235 { 236 unsigned int dst_len; 237 238 if (s->pixelformat == V4L2_SDR_FMT_RU12LE) { 239 memcpy(dst, src, src_len); 240 dst_len = src_len; 241 } else { 242 dst_len = 0; 243 } 244 245 /* calculate sample rate and output it in 10 seconds intervals */ 246 if (unlikely(time_is_before_jiffies(s->jiffies_next))) { 247 #define MSECS 10000UL 248 unsigned int msecs = jiffies_to_msecs(jiffies - 249 s->jiffies_next + msecs_to_jiffies(MSECS)); 250 unsigned int samples = s->sample - s->sample_measured; 251 252 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); 253 s->sample_measured = s->sample; 254 dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n", 255 src_len, samples, msecs, 256 samples * 1000UL / msecs); 257 } 258 259 /* total number of samples */ 260 s->sample += src_len / 2; 261 262 return dst_len; 263 } 264 265 /* 266 * This gets called for the bulk stream pipe. This is done in interrupt 267 * time, so it has to be fast, not crash, and not stall. Neat. 268 */ 269 static void airspy_urb_complete(struct urb *urb) 270 { 271 struct airspy *s = urb->context; 272 struct airspy_frame_buf *fbuf; 273 274 dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n", 275 urb->status, urb->actual_length, 276 urb->transfer_buffer_length, urb->error_count); 277 278 switch (urb->status) { 279 case 0: /* success */ 280 case -ETIMEDOUT: /* NAK */ 281 break; 282 case -ECONNRESET: /* kill */ 283 case -ENOENT: 284 case -ESHUTDOWN: 285 return; 286 default: /* error */ 287 dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status); 288 break; 289 } 290 291 if (likely(urb->actual_length > 0)) { 292 void *ptr; 293 unsigned int len; 294 /* get free framebuffer */ 295 fbuf = airspy_get_next_fill_buf(s); 296 if (unlikely(fbuf == NULL)) { 297 s->vb_full++; 298 dev_notice_ratelimited(s->dev, 299 "videobuf is full, %d packets dropped\n", 300 s->vb_full); 301 goto skip; 302 } 303 304 /* fill framebuffer */ 305 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0); 306 len = airspy_convert_stream(s, ptr, urb->transfer_buffer, 307 urb->actual_length); 308 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len); 309 fbuf->vb.vb2_buf.timestamp = ktime_get_ns(); 310 fbuf->vb.sequence = s->sequence++; 311 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE); 312 } 313 skip: 314 usb_submit_urb(urb, GFP_ATOMIC); 315 } 316 317 static int airspy_kill_urbs(struct airspy *s) 318 { 319 int i; 320 321 for (i = s->urbs_submitted - 1; i >= 0; i--) { 322 dev_dbg(s->dev, "kill urb=%d\n", i); 323 /* stop the URB */ 324 usb_kill_urb(s->urb_list[i]); 325 } 326 s->urbs_submitted = 0; 327 328 return 0; 329 } 330 331 static int airspy_submit_urbs(struct airspy *s) 332 { 333 int i, ret; 334 335 for (i = 0; i < s->urbs_initialized; i++) { 336 dev_dbg(s->dev, "submit urb=%d\n", i); 337 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC); 338 if (ret) { 339 dev_err(s->dev, "Could not submit URB no. %d - get them all back\n", 340 i); 341 airspy_kill_urbs(s); 342 return ret; 343 } 344 s->urbs_submitted++; 345 } 346 347 return 0; 348 } 349 350 static int airspy_free_stream_bufs(struct airspy *s) 351 { 352 if (test_bit(USB_STATE_URB_BUF, &s->flags)) { 353 while (s->buf_num) { 354 s->buf_num--; 355 dev_dbg(s->dev, "free buf=%d\n", s->buf_num); 356 usb_free_coherent(s->udev, s->buf_size, 357 s->buf_list[s->buf_num], 358 s->dma_addr[s->buf_num]); 359 } 360 } 361 clear_bit(USB_STATE_URB_BUF, &s->flags); 362 363 return 0; 364 } 365 366 static int airspy_alloc_stream_bufs(struct airspy *s) 367 { 368 s->buf_num = 0; 369 s->buf_size = BULK_BUFFER_SIZE; 370 371 dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n", 372 MAX_BULK_BUFS * BULK_BUFFER_SIZE); 373 374 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) { 375 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev, 376 BULK_BUFFER_SIZE, GFP_ATOMIC, 377 &s->dma_addr[s->buf_num]); 378 if (!s->buf_list[s->buf_num]) { 379 dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num); 380 airspy_free_stream_bufs(s); 381 return -ENOMEM; 382 } 383 384 dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num, 385 s->buf_list[s->buf_num], 386 (long long)s->dma_addr[s->buf_num]); 387 set_bit(USB_STATE_URB_BUF, &s->flags); 388 } 389 390 return 0; 391 } 392 393 static int airspy_free_urbs(struct airspy *s) 394 { 395 int i; 396 397 airspy_kill_urbs(s); 398 399 for (i = s->urbs_initialized - 1; i >= 0; i--) { 400 if (s->urb_list[i]) { 401 dev_dbg(s->dev, "free urb=%d\n", i); 402 /* free the URBs */ 403 usb_free_urb(s->urb_list[i]); 404 } 405 } 406 s->urbs_initialized = 0; 407 408 return 0; 409 } 410 411 static int airspy_alloc_urbs(struct airspy *s) 412 { 413 int i, j; 414 415 /* allocate the URBs */ 416 for (i = 0; i < MAX_BULK_BUFS; i++) { 417 dev_dbg(s->dev, "alloc urb=%d\n", i); 418 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); 419 if (!s->urb_list[i]) { 420 for (j = 0; j < i; j++) 421 usb_free_urb(s->urb_list[j]); 422 return -ENOMEM; 423 } 424 usb_fill_bulk_urb(s->urb_list[i], 425 s->udev, 426 usb_rcvbulkpipe(s->udev, 0x81), 427 s->buf_list[i], 428 BULK_BUFFER_SIZE, 429 airspy_urb_complete, s); 430 431 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 432 s->urb_list[i]->transfer_dma = s->dma_addr[i]; 433 s->urbs_initialized++; 434 } 435 436 return 0; 437 } 438 439 /* Must be called with vb_queue_lock hold */ 440 static void airspy_cleanup_queued_bufs(struct airspy *s) 441 { 442 unsigned long flags; 443 444 dev_dbg(s->dev, "\n"); 445 446 spin_lock_irqsave(&s->queued_bufs_lock, flags); 447 while (!list_empty(&s->queued_bufs)) { 448 struct airspy_frame_buf *buf; 449 450 buf = list_entry(s->queued_bufs.next, 451 struct airspy_frame_buf, list); 452 list_del(&buf->list); 453 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 454 } 455 spin_unlock_irqrestore(&s->queued_bufs_lock, flags); 456 } 457 458 /* The user yanked out the cable... */ 459 static void airspy_disconnect(struct usb_interface *intf) 460 { 461 struct v4l2_device *v = usb_get_intfdata(intf); 462 struct airspy *s = container_of(v, struct airspy, v4l2_dev); 463 464 dev_dbg(s->dev, "\n"); 465 466 mutex_lock(&s->vb_queue_lock); 467 mutex_lock(&s->v4l2_lock); 468 /* No need to keep the urbs around after disconnection */ 469 s->udev = NULL; 470 v4l2_device_disconnect(&s->v4l2_dev); 471 video_unregister_device(&s->vdev); 472 mutex_unlock(&s->v4l2_lock); 473 mutex_unlock(&s->vb_queue_lock); 474 475 v4l2_device_put(&s->v4l2_dev); 476 } 477 478 /* Videobuf2 operations */ 479 static int airspy_queue_setup(struct vb2_queue *vq, 480 unsigned int *nbuffers, 481 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 482 { 483 struct airspy *s = vb2_get_drv_priv(vq); 484 485 dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers); 486 487 /* Need at least 8 buffers */ 488 if (vq->num_buffers + *nbuffers < 8) 489 *nbuffers = 8 - vq->num_buffers; 490 *nplanes = 1; 491 sizes[0] = PAGE_ALIGN(s->buffersize); 492 493 dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]); 494 return 0; 495 } 496 497 static void airspy_buf_queue(struct vb2_buffer *vb) 498 { 499 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 500 struct airspy *s = vb2_get_drv_priv(vb->vb2_queue); 501 struct airspy_frame_buf *buf = 502 container_of(vbuf, struct airspy_frame_buf, vb); 503 unsigned long flags; 504 505 /* Check the device has not disconnected between prep and queuing */ 506 if (unlikely(!s->udev)) { 507 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 508 return; 509 } 510 511 spin_lock_irqsave(&s->queued_bufs_lock, flags); 512 list_add_tail(&buf->list, &s->queued_bufs); 513 spin_unlock_irqrestore(&s->queued_bufs_lock, flags); 514 } 515 516 static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count) 517 { 518 struct airspy *s = vb2_get_drv_priv(vq); 519 int ret; 520 521 dev_dbg(s->dev, "\n"); 522 523 if (!s->udev) 524 return -ENODEV; 525 526 mutex_lock(&s->v4l2_lock); 527 528 s->sequence = 0; 529 530 set_bit(POWER_ON, &s->flags); 531 532 ret = airspy_alloc_stream_bufs(s); 533 if (ret) 534 goto err_clear_bit; 535 536 ret = airspy_alloc_urbs(s); 537 if (ret) 538 goto err_free_stream_bufs; 539 540 ret = airspy_submit_urbs(s); 541 if (ret) 542 goto err_free_urbs; 543 544 /* start hardware streaming */ 545 ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0); 546 if (ret) 547 goto err_kill_urbs; 548 549 goto exit_mutex_unlock; 550 551 err_kill_urbs: 552 airspy_kill_urbs(s); 553 err_free_urbs: 554 airspy_free_urbs(s); 555 err_free_stream_bufs: 556 airspy_free_stream_bufs(s); 557 err_clear_bit: 558 clear_bit(POWER_ON, &s->flags); 559 560 /* return all queued buffers to vb2 */ 561 { 562 struct airspy_frame_buf *buf, *tmp; 563 564 list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) { 565 list_del(&buf->list); 566 vb2_buffer_done(&buf->vb.vb2_buf, 567 VB2_BUF_STATE_QUEUED); 568 } 569 } 570 571 exit_mutex_unlock: 572 mutex_unlock(&s->v4l2_lock); 573 574 return ret; 575 } 576 577 static void airspy_stop_streaming(struct vb2_queue *vq) 578 { 579 struct airspy *s = vb2_get_drv_priv(vq); 580 581 dev_dbg(s->dev, "\n"); 582 583 mutex_lock(&s->v4l2_lock); 584 585 /* stop hardware streaming */ 586 airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0); 587 588 airspy_kill_urbs(s); 589 airspy_free_urbs(s); 590 airspy_free_stream_bufs(s); 591 592 airspy_cleanup_queued_bufs(s); 593 594 clear_bit(POWER_ON, &s->flags); 595 596 mutex_unlock(&s->v4l2_lock); 597 } 598 599 static const struct vb2_ops airspy_vb2_ops = { 600 .queue_setup = airspy_queue_setup, 601 .buf_queue = airspy_buf_queue, 602 .start_streaming = airspy_start_streaming, 603 .stop_streaming = airspy_stop_streaming, 604 .wait_prepare = vb2_ops_wait_prepare, 605 .wait_finish = vb2_ops_wait_finish, 606 }; 607 608 static int airspy_querycap(struct file *file, void *fh, 609 struct v4l2_capability *cap) 610 { 611 struct airspy *s = video_drvdata(file); 612 613 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 614 strscpy(cap->card, s->vdev.name, sizeof(cap->card)); 615 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info)); 616 return 0; 617 } 618 619 static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv, 620 struct v4l2_fmtdesc *f) 621 { 622 if (f->index >= NUM_FORMATS) 623 return -EINVAL; 624 625 strscpy(f->description, formats[f->index].name, sizeof(f->description)); 626 f->pixelformat = formats[f->index].pixelformat; 627 628 return 0; 629 } 630 631 static int airspy_g_fmt_sdr_cap(struct file *file, void *priv, 632 struct v4l2_format *f) 633 { 634 struct airspy *s = video_drvdata(file); 635 636 f->fmt.sdr.pixelformat = s->pixelformat; 637 f->fmt.sdr.buffersize = s->buffersize; 638 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 639 640 return 0; 641 } 642 643 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 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 654 for (i = 0; i < NUM_FORMATS; i++) { 655 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 656 s->pixelformat = formats[i].pixelformat; 657 s->buffersize = formats[i].buffersize; 658 f->fmt.sdr.buffersize = formats[i].buffersize; 659 return 0; 660 } 661 } 662 663 s->pixelformat = formats[0].pixelformat; 664 s->buffersize = formats[0].buffersize; 665 f->fmt.sdr.pixelformat = formats[0].pixelformat; 666 f->fmt.sdr.buffersize = formats[0].buffersize; 667 668 return 0; 669 } 670 671 static int airspy_try_fmt_sdr_cap(struct file *file, void *priv, 672 struct v4l2_format *f) 673 { 674 int i; 675 676 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 677 for (i = 0; i < NUM_FORMATS; i++) { 678 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 679 f->fmt.sdr.buffersize = formats[i].buffersize; 680 return 0; 681 } 682 } 683 684 f->fmt.sdr.pixelformat = formats[0].pixelformat; 685 f->fmt.sdr.buffersize = formats[0].buffersize; 686 687 return 0; 688 } 689 690 static int airspy_s_tuner(struct file *file, void *priv, 691 const struct v4l2_tuner *v) 692 { 693 int ret; 694 695 if (v->index == 0) 696 ret = 0; 697 else if (v->index == 1) 698 ret = 0; 699 else 700 ret = -EINVAL; 701 702 return ret; 703 } 704 705 static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) 706 { 707 int ret; 708 709 if (v->index == 0) { 710 strscpy(v->name, "AirSpy ADC", sizeof(v->name)); 711 v->type = V4L2_TUNER_ADC; 712 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 713 v->rangelow = bands[0].rangelow; 714 v->rangehigh = bands[0].rangehigh; 715 ret = 0; 716 } else if (v->index == 1) { 717 strscpy(v->name, "AirSpy RF", sizeof(v->name)); 718 v->type = V4L2_TUNER_RF; 719 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 720 v->rangelow = bands_rf[0].rangelow; 721 v->rangehigh = bands_rf[0].rangehigh; 722 ret = 0; 723 } else { 724 ret = -EINVAL; 725 } 726 727 return ret; 728 } 729 730 static int airspy_g_frequency(struct file *file, void *priv, 731 struct v4l2_frequency *f) 732 { 733 struct airspy *s = video_drvdata(file); 734 int ret; 735 736 if (f->tuner == 0) { 737 f->type = V4L2_TUNER_ADC; 738 f->frequency = s->f_adc; 739 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); 740 ret = 0; 741 } else if (f->tuner == 1) { 742 f->type = V4L2_TUNER_RF; 743 f->frequency = s->f_rf; 744 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); 745 ret = 0; 746 } else { 747 ret = -EINVAL; 748 } 749 750 return ret; 751 } 752 753 static int airspy_s_frequency(struct file *file, void *priv, 754 const struct v4l2_frequency *f) 755 { 756 struct airspy *s = video_drvdata(file); 757 int ret; 758 u8 buf[4]; 759 760 if (f->tuner == 0) { 761 s->f_adc = clamp_t(unsigned int, f->frequency, 762 bands[0].rangelow, 763 bands[0].rangehigh); 764 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); 765 ret = 0; 766 } else if (f->tuner == 1) { 767 s->f_rf = clamp_t(unsigned int, f->frequency, 768 bands_rf[0].rangelow, 769 bands_rf[0].rangehigh); 770 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); 771 buf[0] = (s->f_rf >> 0) & 0xff; 772 buf[1] = (s->f_rf >> 8) & 0xff; 773 buf[2] = (s->f_rf >> 16) & 0xff; 774 buf[3] = (s->f_rf >> 24) & 0xff; 775 ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4); 776 } else { 777 ret = -EINVAL; 778 } 779 780 return ret; 781 } 782 783 static int airspy_enum_freq_bands(struct file *file, void *priv, 784 struct v4l2_frequency_band *band) 785 { 786 int ret; 787 788 if (band->tuner == 0) { 789 if (band->index >= ARRAY_SIZE(bands)) { 790 ret = -EINVAL; 791 } else { 792 *band = bands[band->index]; 793 ret = 0; 794 } 795 } else if (band->tuner == 1) { 796 if (band->index >= ARRAY_SIZE(bands_rf)) { 797 ret = -EINVAL; 798 } else { 799 *band = bands_rf[band->index]; 800 ret = 0; 801 } 802 } else { 803 ret = -EINVAL; 804 } 805 806 return ret; 807 } 808 809 static const struct v4l2_ioctl_ops airspy_ioctl_ops = { 810 .vidioc_querycap = airspy_querycap, 811 812 .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap, 813 .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap, 814 .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap, 815 .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap, 816 817 .vidioc_reqbufs = vb2_ioctl_reqbufs, 818 .vidioc_create_bufs = vb2_ioctl_create_bufs, 819 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 820 .vidioc_querybuf = vb2_ioctl_querybuf, 821 .vidioc_qbuf = vb2_ioctl_qbuf, 822 .vidioc_dqbuf = vb2_ioctl_dqbuf, 823 824 .vidioc_streamon = vb2_ioctl_streamon, 825 .vidioc_streamoff = vb2_ioctl_streamoff, 826 827 .vidioc_g_tuner = airspy_g_tuner, 828 .vidioc_s_tuner = airspy_s_tuner, 829 830 .vidioc_g_frequency = airspy_g_frequency, 831 .vidioc_s_frequency = airspy_s_frequency, 832 .vidioc_enum_freq_bands = airspy_enum_freq_bands, 833 834 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 835 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 836 .vidioc_log_status = v4l2_ctrl_log_status, 837 }; 838 839 static const struct v4l2_file_operations airspy_fops = { 840 .owner = THIS_MODULE, 841 .open = v4l2_fh_open, 842 .release = vb2_fop_release, 843 .read = vb2_fop_read, 844 .poll = vb2_fop_poll, 845 .mmap = vb2_fop_mmap, 846 .unlocked_ioctl = video_ioctl2, 847 }; 848 849 static const struct video_device airspy_template = { 850 .name = "AirSpy SDR", 851 .release = video_device_release_empty, 852 .fops = &airspy_fops, 853 .ioctl_ops = &airspy_ioctl_ops, 854 }; 855 856 static void airspy_video_release(struct v4l2_device *v) 857 { 858 struct airspy *s = container_of(v, struct airspy, v4l2_dev); 859 860 v4l2_ctrl_handler_free(&s->hdl); 861 v4l2_device_unregister(&s->v4l2_dev); 862 kfree(s); 863 } 864 865 static int airspy_set_lna_gain(struct airspy *s) 866 { 867 int ret; 868 u8 u8tmp; 869 870 dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n", 871 s->lna_gain_auto->cur.val, s->lna_gain_auto->val, 872 s->lna_gain->cur.val, s->lna_gain->val); 873 874 ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val, 875 &u8tmp, 1); 876 if (ret) 877 goto err; 878 879 if (s->lna_gain_auto->val == false) { 880 ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val, 881 &u8tmp, 1); 882 if (ret) 883 goto err; 884 } 885 err: 886 if (ret) 887 dev_dbg(s->dev, "failed=%d\n", ret); 888 889 return ret; 890 } 891 892 static int airspy_set_mixer_gain(struct airspy *s) 893 { 894 int ret; 895 u8 u8tmp; 896 897 dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n", 898 s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val, 899 s->mixer_gain->cur.val, s->mixer_gain->val); 900 901 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val, 902 &u8tmp, 1); 903 if (ret) 904 goto err; 905 906 if (s->mixer_gain_auto->val == false) { 907 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0, 908 s->mixer_gain->val, &u8tmp, 1); 909 if (ret) 910 goto err; 911 } 912 err: 913 if (ret) 914 dev_dbg(s->dev, "failed=%d\n", ret); 915 916 return ret; 917 } 918 919 static int airspy_set_if_gain(struct airspy *s) 920 { 921 int ret; 922 u8 u8tmp; 923 924 dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val); 925 926 ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val, 927 &u8tmp, 1); 928 if (ret) 929 dev_dbg(s->dev, "failed=%d\n", ret); 930 931 return ret; 932 } 933 934 static int airspy_s_ctrl(struct v4l2_ctrl *ctrl) 935 { 936 struct airspy *s = container_of(ctrl->handler, struct airspy, hdl); 937 int ret; 938 939 switch (ctrl->id) { 940 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: 941 case V4L2_CID_RF_TUNER_LNA_GAIN: 942 ret = airspy_set_lna_gain(s); 943 break; 944 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: 945 case V4L2_CID_RF_TUNER_MIXER_GAIN: 946 ret = airspy_set_mixer_gain(s); 947 break; 948 case V4L2_CID_RF_TUNER_IF_GAIN: 949 ret = airspy_set_if_gain(s); 950 break; 951 default: 952 dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n", 953 ctrl->id, ctrl->name); 954 ret = -EINVAL; 955 } 956 957 return ret; 958 } 959 960 static const struct v4l2_ctrl_ops airspy_ctrl_ops = { 961 .s_ctrl = airspy_s_ctrl, 962 }; 963 964 static int airspy_probe(struct usb_interface *intf, 965 const struct usb_device_id *id) 966 { 967 struct airspy *s; 968 int ret; 969 u8 u8tmp, buf[BUF_SIZE]; 970 971 s = kzalloc(sizeof(struct airspy), GFP_KERNEL); 972 if (s == NULL) { 973 dev_err(&intf->dev, "Could not allocate memory for state\n"); 974 return -ENOMEM; 975 } 976 977 mutex_init(&s->v4l2_lock); 978 mutex_init(&s->vb_queue_lock); 979 spin_lock_init(&s->queued_bufs_lock); 980 INIT_LIST_HEAD(&s->queued_bufs); 981 s->dev = &intf->dev; 982 s->udev = interface_to_usbdev(intf); 983 s->f_adc = bands[0].rangelow; 984 s->f_rf = bands_rf[0].rangelow; 985 s->pixelformat = formats[0].pixelformat; 986 s->buffersize = formats[0].buffersize; 987 988 /* Detect device */ 989 ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1); 990 if (ret == 0) 991 ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0, 992 buf, BUF_SIZE); 993 if (ret) { 994 dev_err(s->dev, "Could not detect board\n"); 995 goto err_free_mem; 996 } 997 998 buf[BUF_SIZE - 1] = '\0'; 999 1000 dev_info(s->dev, "Board ID: %02x\n", u8tmp); 1001 dev_info(s->dev, "Firmware version: %s\n", buf); 1002 1003 /* Init videobuf2 queue structure */ 1004 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE; 1005 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 1006 s->vb_queue.drv_priv = s; 1007 s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf); 1008 s->vb_queue.ops = &airspy_vb2_ops; 1009 s->vb_queue.mem_ops = &vb2_vmalloc_memops; 1010 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1011 ret = vb2_queue_init(&s->vb_queue); 1012 if (ret) { 1013 dev_err(s->dev, "Could not initialize vb2 queue\n"); 1014 goto err_free_mem; 1015 } 1016 1017 /* Init video_device structure */ 1018 s->vdev = airspy_template; 1019 s->vdev.queue = &s->vb_queue; 1020 s->vdev.queue->lock = &s->vb_queue_lock; 1021 video_set_drvdata(&s->vdev, s); 1022 1023 /* Register the v4l2_device structure */ 1024 s->v4l2_dev.release = airspy_video_release; 1025 ret = v4l2_device_register(&intf->dev, &s->v4l2_dev); 1026 if (ret) { 1027 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret); 1028 goto err_free_mem; 1029 } 1030 1031 /* Register controls */ 1032 v4l2_ctrl_handler_init(&s->hdl, 5); 1033 s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1034 V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0); 1035 s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1036 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8); 1037 v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false); 1038 s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1039 V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0); 1040 s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1041 V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8); 1042 v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false); 1043 s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1044 V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0); 1045 if (s->hdl.error) { 1046 ret = s->hdl.error; 1047 dev_err(s->dev, "Could not initialize controls\n"); 1048 goto err_free_controls; 1049 } 1050 1051 v4l2_ctrl_handler_setup(&s->hdl); 1052 1053 s->v4l2_dev.ctrl_handler = &s->hdl; 1054 s->vdev.v4l2_dev = &s->v4l2_dev; 1055 s->vdev.lock = &s->v4l2_lock; 1056 s->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING | 1057 V4L2_CAP_READWRITE | V4L2_CAP_TUNER; 1058 1059 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1); 1060 if (ret) { 1061 dev_err(s->dev, "Failed to register as video device (%d)\n", 1062 ret); 1063 goto err_free_controls; 1064 } 1065 dev_info(s->dev, "Registered as %s\n", 1066 video_device_node_name(&s->vdev)); 1067 dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); 1068 return 0; 1069 1070 err_free_controls: 1071 v4l2_ctrl_handler_free(&s->hdl); 1072 v4l2_device_unregister(&s->v4l2_dev); 1073 err_free_mem: 1074 kfree(s); 1075 return ret; 1076 } 1077 1078 /* USB device ID list */ 1079 static const struct usb_device_id airspy_id_table[] = { 1080 { USB_DEVICE(0x1d50, 0x60a1) }, /* AirSpy */ 1081 { } 1082 }; 1083 MODULE_DEVICE_TABLE(usb, airspy_id_table); 1084 1085 /* USB subsystem interface */ 1086 static struct usb_driver airspy_driver = { 1087 .name = KBUILD_MODNAME, 1088 .probe = airspy_probe, 1089 .disconnect = airspy_disconnect, 1090 .id_table = airspy_id_table, 1091 }; 1092 1093 module_usb_driver(airspy_driver); 1094 1095 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 1096 MODULE_DESCRIPTION("AirSpy SDR"); 1097 MODULE_LICENSE("GPL"); 1098