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 */ 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 */ 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 } 230 231 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 */ 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 } 314 315 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 } 328 329 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 } 347 348 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 } 363 364 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 } 390 391 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 } 408 409 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 */ 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... */ 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 */ 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 } 498 499 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 } 517 518 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 } 578 579 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 }; 609 610 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 } 620 621 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 } 631 632 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 } 642 643 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 } 669 670 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 } 687 688 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 } 702 703 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 } 727 728 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 } 750 751 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 } 780 781 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 }; 853 854 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 } 863 864 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 } 890 891 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 } 917 918 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 } 932 933 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 }; 962 963 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