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-v4l2.h> 25 #include <media/videobuf2-vmalloc.h> 26 27 /* AirSpy USB API commands (from AirSpy Library) */ 28 enum { 29 CMD_INVALID = 0x00, 30 CMD_RECEIVER_MODE = 0x01, 31 CMD_SI5351C_WRITE = 0x02, 32 CMD_SI5351C_READ = 0x03, 33 CMD_R820T_WRITE = 0x04, 34 CMD_R820T_READ = 0x05, 35 CMD_SPIFLASH_ERASE = 0x06, 36 CMD_SPIFLASH_WRITE = 0x07, 37 CMD_SPIFLASH_READ = 0x08, 38 CMD_BOARD_ID_READ = 0x09, 39 CMD_VERSION_STRING_READ = 0x0a, 40 CMD_BOARD_PARTID_SERIALNO_READ = 0x0b, 41 CMD_SET_SAMPLE_RATE = 0x0c, 42 CMD_SET_FREQ = 0x0d, 43 CMD_SET_LNA_GAIN = 0x0e, 44 CMD_SET_MIXER_GAIN = 0x0f, 45 CMD_SET_VGA_GAIN = 0x10, 46 CMD_SET_LNA_AGC = 0x11, 47 CMD_SET_MIXER_AGC = 0x12, 48 CMD_SET_PACKING = 0x13, 49 }; 50 51 /* 52 * bEndpointAddress 0x81 EP 1 IN 53 * Transfer Type Bulk 54 * wMaxPacketSize 0x0200 1x 512 bytes 55 */ 56 #define MAX_BULK_BUFS (6) 57 #define BULK_BUFFER_SIZE (128 * 512) 58 59 static const struct v4l2_frequency_band bands[] = { 60 { 61 .tuner = 0, 62 .type = V4L2_TUNER_ADC, 63 .index = 0, 64 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 65 .rangelow = 20000000, 66 .rangehigh = 20000000, 67 }, 68 }; 69 70 static const struct v4l2_frequency_band bands_rf[] = { 71 { 72 .tuner = 1, 73 .type = V4L2_TUNER_RF, 74 .index = 0, 75 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 76 .rangelow = 24000000, 77 .rangehigh = 1750000000, 78 }, 79 }; 80 81 /* stream formats */ 82 struct airspy_format { 83 char *name; 84 u32 pixelformat; 85 u32 buffersize; 86 }; 87 88 /* format descriptions for capture and preview */ 89 static struct airspy_format formats[] = { 90 { 91 .name = "Real U12LE", 92 .pixelformat = V4L2_SDR_FMT_RU12LE, 93 .buffersize = BULK_BUFFER_SIZE, 94 }, 95 }; 96 97 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); 98 99 /* intermediate buffers with raw data from the USB device */ 100 struct airspy_frame_buf { 101 /* common v4l buffer stuff -- must be first */ 102 struct vb2_v4l2_buffer vb; 103 struct list_head list; 104 }; 105 106 struct airspy { 107 #define POWER_ON 1 108 #define USB_STATE_URB_BUF 2 109 unsigned long flags; 110 111 struct device *dev; 112 struct usb_device *udev; 113 struct video_device vdev; 114 struct v4l2_device v4l2_dev; 115 116 /* videobuf2 queue and queued buffers list */ 117 struct vb2_queue vb_queue; 118 struct list_head queued_bufs; 119 spinlock_t queued_bufs_lock; /* Protects queued_bufs */ 120 unsigned sequence; /* Buffer sequence counter */ 121 unsigned int vb_full; /* vb is full and packets dropped */ 122 123 /* Note if taking both locks v4l2_lock must always be locked first! */ 124 struct mutex v4l2_lock; /* Protects everything else */ 125 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */ 126 127 struct urb *urb_list[MAX_BULK_BUFS]; 128 int buf_num; 129 unsigned long buf_size; 130 u8 *buf_list[MAX_BULK_BUFS]; 131 dma_addr_t dma_addr[MAX_BULK_BUFS]; 132 int urbs_initialized; 133 int urbs_submitted; 134 135 /* USB control message buffer */ 136 #define BUF_SIZE 128 137 u8 buf[BUF_SIZE]; 138 139 /* Current configuration */ 140 unsigned int f_adc; 141 unsigned int f_rf; 142 u32 pixelformat; 143 u32 buffersize; 144 145 /* Controls */ 146 struct v4l2_ctrl_handler hdl; 147 struct v4l2_ctrl *lna_gain_auto; 148 struct v4l2_ctrl *lna_gain; 149 struct v4l2_ctrl *mixer_gain_auto; 150 struct v4l2_ctrl *mixer_gain; 151 struct v4l2_ctrl *if_gain; 152 153 /* Sample rate calc */ 154 unsigned long jiffies_next; 155 unsigned int sample; 156 unsigned int sample_measured; 157 }; 158 159 #define airspy_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \ 160 char *_direction; \ 161 if (_t & USB_DIR_IN) \ 162 _direction = "<<<"; \ 163 else \ 164 _direction = ">>>"; \ 165 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \ 166 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \ 167 _l & 0xff, _l >> 8, _direction, _l, _b); \ 168 } 169 170 /* execute firmware command */ 171 static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index, 172 u8 *data, u16 size) 173 { 174 int ret; 175 unsigned int pipe; 176 u8 requesttype; 177 178 switch (request) { 179 case CMD_RECEIVER_MODE: 180 case CMD_SET_FREQ: 181 pipe = usb_sndctrlpipe(s->udev, 0); 182 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT); 183 break; 184 case CMD_BOARD_ID_READ: 185 case CMD_VERSION_STRING_READ: 186 case CMD_BOARD_PARTID_SERIALNO_READ: 187 case CMD_SET_LNA_GAIN: 188 case CMD_SET_MIXER_GAIN: 189 case CMD_SET_VGA_GAIN: 190 case CMD_SET_LNA_AGC: 191 case CMD_SET_MIXER_AGC: 192 pipe = usb_rcvctrlpipe(s->udev, 0); 193 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN); 194 break; 195 default: 196 dev_err(s->dev, "Unknown command %02x\n", request); 197 ret = -EINVAL; 198 goto err; 199 } 200 201 /* write request */ 202 if (!(requesttype & USB_DIR_IN)) 203 memcpy(s->buf, data, size); 204 205 ret = usb_control_msg(s->udev, pipe, request, requesttype, value, 206 index, s->buf, size, 1000); 207 airspy_dbg_usb_control_msg(s->dev, request, requesttype, value, 208 index, s->buf, size); 209 if (ret < 0) { 210 dev_err(s->dev, "usb_control_msg() failed %d request %02x\n", 211 ret, request); 212 goto err; 213 } 214 215 /* read request */ 216 if (requesttype & USB_DIR_IN) 217 memcpy(data, s->buf, size); 218 219 return 0; 220 err: 221 return ret; 222 } 223 224 /* Private functions */ 225 static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s) 226 { 227 unsigned long flags; 228 struct airspy_frame_buf *buf = NULL; 229 230 spin_lock_irqsave(&s->queued_bufs_lock, flags); 231 if (list_empty(&s->queued_bufs)) 232 goto leave; 233 234 buf = list_entry(s->queued_bufs.next, 235 struct airspy_frame_buf, list); 236 list_del(&buf->list); 237 leave: 238 spin_unlock_irqrestore(&s->queued_bufs_lock, flags); 239 return buf; 240 } 241 242 static unsigned int airspy_convert_stream(struct airspy *s, 243 void *dst, void *src, unsigned int src_len) 244 { 245 unsigned int dst_len; 246 247 if (s->pixelformat == V4L2_SDR_FMT_RU12LE) { 248 memcpy(dst, src, src_len); 249 dst_len = src_len; 250 } else { 251 dst_len = 0; 252 } 253 254 /* calculate sample rate and output it in 10 seconds intervals */ 255 if (unlikely(time_is_before_jiffies(s->jiffies_next))) { 256 #define MSECS 10000UL 257 unsigned int msecs = jiffies_to_msecs(jiffies - 258 s->jiffies_next + msecs_to_jiffies(MSECS)); 259 unsigned int samples = s->sample - s->sample_measured; 260 261 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); 262 s->sample_measured = s->sample; 263 dev_dbg(s->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n", 264 src_len, samples, msecs, 265 samples * 1000UL / msecs); 266 } 267 268 /* total number of samples */ 269 s->sample += src_len / 2; 270 271 return dst_len; 272 } 273 274 /* 275 * This gets called for the bulk stream pipe. This is done in interrupt 276 * time, so it has to be fast, not crash, and not stall. Neat. 277 */ 278 static void airspy_urb_complete(struct urb *urb) 279 { 280 struct airspy *s = urb->context; 281 struct airspy_frame_buf *fbuf; 282 283 dev_dbg_ratelimited(s->dev, "status=%d length=%d/%d errors=%d\n", 284 urb->status, urb->actual_length, 285 urb->transfer_buffer_length, urb->error_count); 286 287 switch (urb->status) { 288 case 0: /* success */ 289 case -ETIMEDOUT: /* NAK */ 290 break; 291 case -ECONNRESET: /* kill */ 292 case -ENOENT: 293 case -ESHUTDOWN: 294 return; 295 default: /* error */ 296 dev_err_ratelimited(s->dev, "URB failed %d\n", urb->status); 297 break; 298 } 299 300 if (likely(urb->actual_length > 0)) { 301 void *ptr; 302 unsigned int len; 303 /* get free framebuffer */ 304 fbuf = airspy_get_next_fill_buf(s); 305 if (unlikely(fbuf == NULL)) { 306 s->vb_full++; 307 dev_notice_ratelimited(s->dev, 308 "videobuf is full, %d packets dropped\n", 309 s->vb_full); 310 goto skip; 311 } 312 313 /* fill framebuffer */ 314 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0); 315 len = airspy_convert_stream(s, ptr, urb->transfer_buffer, 316 urb->actual_length); 317 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len); 318 fbuf->vb.vb2_buf.timestamp = ktime_get_ns(); 319 fbuf->vb.sequence = s->sequence++; 320 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE); 321 } 322 skip: 323 usb_submit_urb(urb, GFP_ATOMIC); 324 } 325 326 static int airspy_kill_urbs(struct airspy *s) 327 { 328 int i; 329 330 for (i = s->urbs_submitted - 1; i >= 0; i--) { 331 dev_dbg(s->dev, "kill urb=%d\n", i); 332 /* stop the URB */ 333 usb_kill_urb(s->urb_list[i]); 334 } 335 s->urbs_submitted = 0; 336 337 return 0; 338 } 339 340 static int airspy_submit_urbs(struct airspy *s) 341 { 342 int i, ret; 343 344 for (i = 0; i < s->urbs_initialized; i++) { 345 dev_dbg(s->dev, "submit urb=%d\n", i); 346 ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC); 347 if (ret) { 348 dev_err(s->dev, "Could not submit URB no. %d - get them all back\n", 349 i); 350 airspy_kill_urbs(s); 351 return ret; 352 } 353 s->urbs_submitted++; 354 } 355 356 return 0; 357 } 358 359 static int airspy_free_stream_bufs(struct airspy *s) 360 { 361 if (test_bit(USB_STATE_URB_BUF, &s->flags)) { 362 while (s->buf_num) { 363 s->buf_num--; 364 dev_dbg(s->dev, "free buf=%d\n", s->buf_num); 365 usb_free_coherent(s->udev, s->buf_size, 366 s->buf_list[s->buf_num], 367 s->dma_addr[s->buf_num]); 368 } 369 } 370 clear_bit(USB_STATE_URB_BUF, &s->flags); 371 372 return 0; 373 } 374 375 static int airspy_alloc_stream_bufs(struct airspy *s) 376 { 377 s->buf_num = 0; 378 s->buf_size = BULK_BUFFER_SIZE; 379 380 dev_dbg(s->dev, "all in all I will use %u bytes for streaming\n", 381 MAX_BULK_BUFS * BULK_BUFFER_SIZE); 382 383 for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) { 384 s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev, 385 BULK_BUFFER_SIZE, GFP_ATOMIC, 386 &s->dma_addr[s->buf_num]); 387 if (!s->buf_list[s->buf_num]) { 388 dev_dbg(s->dev, "alloc buf=%d failed\n", s->buf_num); 389 airspy_free_stream_bufs(s); 390 return -ENOMEM; 391 } 392 393 dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", s->buf_num, 394 s->buf_list[s->buf_num], 395 (long long)s->dma_addr[s->buf_num]); 396 set_bit(USB_STATE_URB_BUF, &s->flags); 397 } 398 399 return 0; 400 } 401 402 static int airspy_free_urbs(struct airspy *s) 403 { 404 int i; 405 406 airspy_kill_urbs(s); 407 408 for (i = s->urbs_initialized - 1; i >= 0; i--) { 409 if (s->urb_list[i]) { 410 dev_dbg(s->dev, "free urb=%d\n", i); 411 /* free the URBs */ 412 usb_free_urb(s->urb_list[i]); 413 } 414 } 415 s->urbs_initialized = 0; 416 417 return 0; 418 } 419 420 static int airspy_alloc_urbs(struct airspy *s) 421 { 422 int i, j; 423 424 /* allocate the URBs */ 425 for (i = 0; i < MAX_BULK_BUFS; i++) { 426 dev_dbg(s->dev, "alloc urb=%d\n", i); 427 s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); 428 if (!s->urb_list[i]) { 429 for (j = 0; j < i; j++) 430 usb_free_urb(s->urb_list[j]); 431 return -ENOMEM; 432 } 433 usb_fill_bulk_urb(s->urb_list[i], 434 s->udev, 435 usb_rcvbulkpipe(s->udev, 0x81), 436 s->buf_list[i], 437 BULK_BUFFER_SIZE, 438 airspy_urb_complete, s); 439 440 s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 441 s->urb_list[i]->transfer_dma = s->dma_addr[i]; 442 s->urbs_initialized++; 443 } 444 445 return 0; 446 } 447 448 /* Must be called with vb_queue_lock hold */ 449 static void airspy_cleanup_queued_bufs(struct airspy *s) 450 { 451 unsigned long flags; 452 453 dev_dbg(s->dev, "\n"); 454 455 spin_lock_irqsave(&s->queued_bufs_lock, flags); 456 while (!list_empty(&s->queued_bufs)) { 457 struct airspy_frame_buf *buf; 458 459 buf = list_entry(s->queued_bufs.next, 460 struct airspy_frame_buf, list); 461 list_del(&buf->list); 462 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 463 } 464 spin_unlock_irqrestore(&s->queued_bufs_lock, flags); 465 } 466 467 /* The user yanked out the cable... */ 468 static void airspy_disconnect(struct usb_interface *intf) 469 { 470 struct v4l2_device *v = usb_get_intfdata(intf); 471 struct airspy *s = container_of(v, struct airspy, v4l2_dev); 472 473 dev_dbg(s->dev, "\n"); 474 475 mutex_lock(&s->vb_queue_lock); 476 mutex_lock(&s->v4l2_lock); 477 /* No need to keep the urbs around after disconnection */ 478 s->udev = NULL; 479 v4l2_device_disconnect(&s->v4l2_dev); 480 video_unregister_device(&s->vdev); 481 mutex_unlock(&s->v4l2_lock); 482 mutex_unlock(&s->vb_queue_lock); 483 484 v4l2_device_put(&s->v4l2_dev); 485 } 486 487 /* Videobuf2 operations */ 488 static int airspy_queue_setup(struct vb2_queue *vq, 489 unsigned int *nbuffers, 490 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 491 { 492 struct airspy *s = vb2_get_drv_priv(vq); 493 494 dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers); 495 496 /* Need at least 8 buffers */ 497 if (vq->num_buffers + *nbuffers < 8) 498 *nbuffers = 8 - vq->num_buffers; 499 *nplanes = 1; 500 sizes[0] = PAGE_ALIGN(s->buffersize); 501 502 dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]); 503 return 0; 504 } 505 506 static void airspy_buf_queue(struct vb2_buffer *vb) 507 { 508 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 509 struct airspy *s = vb2_get_drv_priv(vb->vb2_queue); 510 struct airspy_frame_buf *buf = 511 container_of(vbuf, struct airspy_frame_buf, vb); 512 unsigned long flags; 513 514 /* Check the device has not disconnected between prep and queuing */ 515 if (unlikely(!s->udev)) { 516 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 517 return; 518 } 519 520 spin_lock_irqsave(&s->queued_bufs_lock, flags); 521 list_add_tail(&buf->list, &s->queued_bufs); 522 spin_unlock_irqrestore(&s->queued_bufs_lock, flags); 523 } 524 525 static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count) 526 { 527 struct airspy *s = vb2_get_drv_priv(vq); 528 int ret; 529 530 dev_dbg(s->dev, "\n"); 531 532 if (!s->udev) 533 return -ENODEV; 534 535 mutex_lock(&s->v4l2_lock); 536 537 s->sequence = 0; 538 539 set_bit(POWER_ON, &s->flags); 540 541 ret = airspy_alloc_stream_bufs(s); 542 if (ret) 543 goto err_clear_bit; 544 545 ret = airspy_alloc_urbs(s); 546 if (ret) 547 goto err_free_stream_bufs; 548 549 ret = airspy_submit_urbs(s); 550 if (ret) 551 goto err_free_urbs; 552 553 /* start hardware streaming */ 554 ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0); 555 if (ret) 556 goto err_kill_urbs; 557 558 goto exit_mutex_unlock; 559 560 err_kill_urbs: 561 airspy_kill_urbs(s); 562 err_free_urbs: 563 airspy_free_urbs(s); 564 err_free_stream_bufs: 565 airspy_free_stream_bufs(s); 566 err_clear_bit: 567 clear_bit(POWER_ON, &s->flags); 568 569 /* return all queued buffers to vb2 */ 570 { 571 struct airspy_frame_buf *buf, *tmp; 572 573 list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) { 574 list_del(&buf->list); 575 vb2_buffer_done(&buf->vb.vb2_buf, 576 VB2_BUF_STATE_QUEUED); 577 } 578 } 579 580 exit_mutex_unlock: 581 mutex_unlock(&s->v4l2_lock); 582 583 return ret; 584 } 585 586 static void airspy_stop_streaming(struct vb2_queue *vq) 587 { 588 struct airspy *s = vb2_get_drv_priv(vq); 589 590 dev_dbg(s->dev, "\n"); 591 592 mutex_lock(&s->v4l2_lock); 593 594 /* stop hardware streaming */ 595 airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0); 596 597 airspy_kill_urbs(s); 598 airspy_free_urbs(s); 599 airspy_free_stream_bufs(s); 600 601 airspy_cleanup_queued_bufs(s); 602 603 clear_bit(POWER_ON, &s->flags); 604 605 mutex_unlock(&s->v4l2_lock); 606 } 607 608 static const struct vb2_ops airspy_vb2_ops = { 609 .queue_setup = airspy_queue_setup, 610 .buf_queue = airspy_buf_queue, 611 .start_streaming = airspy_start_streaming, 612 .stop_streaming = airspy_stop_streaming, 613 .wait_prepare = vb2_ops_wait_prepare, 614 .wait_finish = vb2_ops_wait_finish, 615 }; 616 617 static int airspy_querycap(struct file *file, void *fh, 618 struct v4l2_capability *cap) 619 { 620 struct airspy *s = video_drvdata(file); 621 622 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 623 strscpy(cap->card, s->vdev.name, sizeof(cap->card)); 624 usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info)); 625 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING | 626 V4L2_CAP_READWRITE | V4L2_CAP_TUNER; 627 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 628 629 return 0; 630 } 631 632 static int airspy_enum_fmt_sdr_cap(struct file *file, void *priv, 633 struct v4l2_fmtdesc *f) 634 { 635 if (f->index >= NUM_FORMATS) 636 return -EINVAL; 637 638 strscpy(f->description, formats[f->index].name, sizeof(f->description)); 639 f->pixelformat = formats[f->index].pixelformat; 640 641 return 0; 642 } 643 644 static int airspy_g_fmt_sdr_cap(struct file *file, void *priv, 645 struct v4l2_format *f) 646 { 647 struct airspy *s = video_drvdata(file); 648 649 f->fmt.sdr.pixelformat = s->pixelformat; 650 f->fmt.sdr.buffersize = s->buffersize; 651 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 652 653 return 0; 654 } 655 656 static int airspy_s_fmt_sdr_cap(struct file *file, void *priv, 657 struct v4l2_format *f) 658 { 659 struct airspy *s = video_drvdata(file); 660 struct vb2_queue *q = &s->vb_queue; 661 int i; 662 663 if (vb2_is_busy(q)) 664 return -EBUSY; 665 666 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 667 for (i = 0; i < NUM_FORMATS; i++) { 668 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 669 s->pixelformat = formats[i].pixelformat; 670 s->buffersize = formats[i].buffersize; 671 f->fmt.sdr.buffersize = formats[i].buffersize; 672 return 0; 673 } 674 } 675 676 s->pixelformat = formats[0].pixelformat; 677 s->buffersize = formats[0].buffersize; 678 f->fmt.sdr.pixelformat = formats[0].pixelformat; 679 f->fmt.sdr.buffersize = formats[0].buffersize; 680 681 return 0; 682 } 683 684 static int airspy_try_fmt_sdr_cap(struct file *file, void *priv, 685 struct v4l2_format *f) 686 { 687 int i; 688 689 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 690 for (i = 0; i < NUM_FORMATS; i++) { 691 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 692 f->fmt.sdr.buffersize = formats[i].buffersize; 693 return 0; 694 } 695 } 696 697 f->fmt.sdr.pixelformat = formats[0].pixelformat; 698 f->fmt.sdr.buffersize = formats[0].buffersize; 699 700 return 0; 701 } 702 703 static int airspy_s_tuner(struct file *file, void *priv, 704 const struct v4l2_tuner *v) 705 { 706 int ret; 707 708 if (v->index == 0) 709 ret = 0; 710 else if (v->index == 1) 711 ret = 0; 712 else 713 ret = -EINVAL; 714 715 return ret; 716 } 717 718 static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) 719 { 720 int ret; 721 722 if (v->index == 0) { 723 strscpy(v->name, "AirSpy ADC", sizeof(v->name)); 724 v->type = V4L2_TUNER_ADC; 725 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 726 v->rangelow = bands[0].rangelow; 727 v->rangehigh = bands[0].rangehigh; 728 ret = 0; 729 } else if (v->index == 1) { 730 strscpy(v->name, "AirSpy RF", sizeof(v->name)); 731 v->type = V4L2_TUNER_RF; 732 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 733 v->rangelow = bands_rf[0].rangelow; 734 v->rangehigh = bands_rf[0].rangehigh; 735 ret = 0; 736 } else { 737 ret = -EINVAL; 738 } 739 740 return ret; 741 } 742 743 static int airspy_g_frequency(struct file *file, void *priv, 744 struct v4l2_frequency *f) 745 { 746 struct airspy *s = video_drvdata(file); 747 int ret; 748 749 if (f->tuner == 0) { 750 f->type = V4L2_TUNER_ADC; 751 f->frequency = s->f_adc; 752 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); 753 ret = 0; 754 } else if (f->tuner == 1) { 755 f->type = V4L2_TUNER_RF; 756 f->frequency = s->f_rf; 757 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); 758 ret = 0; 759 } else { 760 ret = -EINVAL; 761 } 762 763 return ret; 764 } 765 766 static int airspy_s_frequency(struct file *file, void *priv, 767 const struct v4l2_frequency *f) 768 { 769 struct airspy *s = video_drvdata(file); 770 int ret; 771 u8 buf[4]; 772 773 if (f->tuner == 0) { 774 s->f_adc = clamp_t(unsigned int, f->frequency, 775 bands[0].rangelow, 776 bands[0].rangehigh); 777 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); 778 ret = 0; 779 } else if (f->tuner == 1) { 780 s->f_rf = clamp_t(unsigned int, f->frequency, 781 bands_rf[0].rangelow, 782 bands_rf[0].rangehigh); 783 dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); 784 buf[0] = (s->f_rf >> 0) & 0xff; 785 buf[1] = (s->f_rf >> 8) & 0xff; 786 buf[2] = (s->f_rf >> 16) & 0xff; 787 buf[3] = (s->f_rf >> 24) & 0xff; 788 ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4); 789 } else { 790 ret = -EINVAL; 791 } 792 793 return ret; 794 } 795 796 static int airspy_enum_freq_bands(struct file *file, void *priv, 797 struct v4l2_frequency_band *band) 798 { 799 int ret; 800 801 if (band->tuner == 0) { 802 if (band->index >= ARRAY_SIZE(bands)) { 803 ret = -EINVAL; 804 } else { 805 *band = bands[band->index]; 806 ret = 0; 807 } 808 } else if (band->tuner == 1) { 809 if (band->index >= ARRAY_SIZE(bands_rf)) { 810 ret = -EINVAL; 811 } else { 812 *band = bands_rf[band->index]; 813 ret = 0; 814 } 815 } else { 816 ret = -EINVAL; 817 } 818 819 return ret; 820 } 821 822 static const struct v4l2_ioctl_ops airspy_ioctl_ops = { 823 .vidioc_querycap = airspy_querycap, 824 825 .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap, 826 .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap, 827 .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap, 828 .vidioc_try_fmt_sdr_cap = airspy_try_fmt_sdr_cap, 829 830 .vidioc_reqbufs = vb2_ioctl_reqbufs, 831 .vidioc_create_bufs = vb2_ioctl_create_bufs, 832 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 833 .vidioc_querybuf = vb2_ioctl_querybuf, 834 .vidioc_qbuf = vb2_ioctl_qbuf, 835 .vidioc_dqbuf = vb2_ioctl_dqbuf, 836 837 .vidioc_streamon = vb2_ioctl_streamon, 838 .vidioc_streamoff = vb2_ioctl_streamoff, 839 840 .vidioc_g_tuner = airspy_g_tuner, 841 .vidioc_s_tuner = airspy_s_tuner, 842 843 .vidioc_g_frequency = airspy_g_frequency, 844 .vidioc_s_frequency = airspy_s_frequency, 845 .vidioc_enum_freq_bands = airspy_enum_freq_bands, 846 847 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 848 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 849 .vidioc_log_status = v4l2_ctrl_log_status, 850 }; 851 852 static const struct v4l2_file_operations airspy_fops = { 853 .owner = THIS_MODULE, 854 .open = v4l2_fh_open, 855 .release = vb2_fop_release, 856 .read = vb2_fop_read, 857 .poll = vb2_fop_poll, 858 .mmap = vb2_fop_mmap, 859 .unlocked_ioctl = video_ioctl2, 860 }; 861 862 static const struct video_device airspy_template = { 863 .name = "AirSpy SDR", 864 .release = video_device_release_empty, 865 .fops = &airspy_fops, 866 .ioctl_ops = &airspy_ioctl_ops, 867 }; 868 869 static void airspy_video_release(struct v4l2_device *v) 870 { 871 struct airspy *s = container_of(v, struct airspy, v4l2_dev); 872 873 v4l2_ctrl_handler_free(&s->hdl); 874 v4l2_device_unregister(&s->v4l2_dev); 875 kfree(s); 876 } 877 878 static int airspy_set_lna_gain(struct airspy *s) 879 { 880 int ret; 881 u8 u8tmp; 882 883 dev_dbg(s->dev, "lna auto=%d->%d val=%d->%d\n", 884 s->lna_gain_auto->cur.val, s->lna_gain_auto->val, 885 s->lna_gain->cur.val, s->lna_gain->val); 886 887 ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val, 888 &u8tmp, 1); 889 if (ret) 890 goto err; 891 892 if (s->lna_gain_auto->val == false) { 893 ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val, 894 &u8tmp, 1); 895 if (ret) 896 goto err; 897 } 898 err: 899 if (ret) 900 dev_dbg(s->dev, "failed=%d\n", ret); 901 902 return ret; 903 } 904 905 static int airspy_set_mixer_gain(struct airspy *s) 906 { 907 int ret; 908 u8 u8tmp; 909 910 dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n", 911 s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val, 912 s->mixer_gain->cur.val, s->mixer_gain->val); 913 914 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val, 915 &u8tmp, 1); 916 if (ret) 917 goto err; 918 919 if (s->mixer_gain_auto->val == false) { 920 ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0, 921 s->mixer_gain->val, &u8tmp, 1); 922 if (ret) 923 goto err; 924 } 925 err: 926 if (ret) 927 dev_dbg(s->dev, "failed=%d\n", ret); 928 929 return ret; 930 } 931 932 static int airspy_set_if_gain(struct airspy *s) 933 { 934 int ret; 935 u8 u8tmp; 936 937 dev_dbg(s->dev, "val=%d->%d\n", s->if_gain->cur.val, s->if_gain->val); 938 939 ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val, 940 &u8tmp, 1); 941 if (ret) 942 dev_dbg(s->dev, "failed=%d\n", ret); 943 944 return ret; 945 } 946 947 static int airspy_s_ctrl(struct v4l2_ctrl *ctrl) 948 { 949 struct airspy *s = container_of(ctrl->handler, struct airspy, hdl); 950 int ret; 951 952 switch (ctrl->id) { 953 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: 954 case V4L2_CID_RF_TUNER_LNA_GAIN: 955 ret = airspy_set_lna_gain(s); 956 break; 957 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: 958 case V4L2_CID_RF_TUNER_MIXER_GAIN: 959 ret = airspy_set_mixer_gain(s); 960 break; 961 case V4L2_CID_RF_TUNER_IF_GAIN: 962 ret = airspy_set_if_gain(s); 963 break; 964 default: 965 dev_dbg(s->dev, "unknown ctrl: id=%d name=%s\n", 966 ctrl->id, ctrl->name); 967 ret = -EINVAL; 968 } 969 970 return ret; 971 } 972 973 static const struct v4l2_ctrl_ops airspy_ctrl_ops = { 974 .s_ctrl = airspy_s_ctrl, 975 }; 976 977 static int airspy_probe(struct usb_interface *intf, 978 const struct usb_device_id *id) 979 { 980 struct airspy *s; 981 int ret; 982 u8 u8tmp, buf[BUF_SIZE]; 983 984 s = kzalloc(sizeof(struct airspy), GFP_KERNEL); 985 if (s == NULL) { 986 dev_err(&intf->dev, "Could not allocate memory for state\n"); 987 return -ENOMEM; 988 } 989 990 mutex_init(&s->v4l2_lock); 991 mutex_init(&s->vb_queue_lock); 992 spin_lock_init(&s->queued_bufs_lock); 993 INIT_LIST_HEAD(&s->queued_bufs); 994 s->dev = &intf->dev; 995 s->udev = interface_to_usbdev(intf); 996 s->f_adc = bands[0].rangelow; 997 s->f_rf = bands_rf[0].rangelow; 998 s->pixelformat = formats[0].pixelformat; 999 s->buffersize = formats[0].buffersize; 1000 1001 /* Detect device */ 1002 ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1); 1003 if (ret == 0) 1004 ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0, 1005 buf, BUF_SIZE); 1006 if (ret) { 1007 dev_err(s->dev, "Could not detect board\n"); 1008 goto err_free_mem; 1009 } 1010 1011 buf[BUF_SIZE - 1] = '\0'; 1012 1013 dev_info(s->dev, "Board ID: %02x\n", u8tmp); 1014 dev_info(s->dev, "Firmware version: %s\n", buf); 1015 1016 /* Init videobuf2 queue structure */ 1017 s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE; 1018 s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; 1019 s->vb_queue.drv_priv = s; 1020 s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf); 1021 s->vb_queue.ops = &airspy_vb2_ops; 1022 s->vb_queue.mem_ops = &vb2_vmalloc_memops; 1023 s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1024 ret = vb2_queue_init(&s->vb_queue); 1025 if (ret) { 1026 dev_err(s->dev, "Could not initialize vb2 queue\n"); 1027 goto err_free_mem; 1028 } 1029 1030 /* Init video_device structure */ 1031 s->vdev = airspy_template; 1032 s->vdev.queue = &s->vb_queue; 1033 s->vdev.queue->lock = &s->vb_queue_lock; 1034 video_set_drvdata(&s->vdev, s); 1035 1036 /* Register the v4l2_device structure */ 1037 s->v4l2_dev.release = airspy_video_release; 1038 ret = v4l2_device_register(&intf->dev, &s->v4l2_dev); 1039 if (ret) { 1040 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret); 1041 goto err_free_mem; 1042 } 1043 1044 /* Register controls */ 1045 v4l2_ctrl_handler_init(&s->hdl, 5); 1046 s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1047 V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0); 1048 s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1049 V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8); 1050 v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false); 1051 s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1052 V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0); 1053 s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1054 V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8); 1055 v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false); 1056 s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops, 1057 V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0); 1058 if (s->hdl.error) { 1059 ret = s->hdl.error; 1060 dev_err(s->dev, "Could not initialize controls\n"); 1061 goto err_free_controls; 1062 } 1063 1064 v4l2_ctrl_handler_setup(&s->hdl); 1065 1066 s->v4l2_dev.ctrl_handler = &s->hdl; 1067 s->vdev.v4l2_dev = &s->v4l2_dev; 1068 s->vdev.lock = &s->v4l2_lock; 1069 1070 ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1); 1071 if (ret) { 1072 dev_err(s->dev, "Failed to register as video device (%d)\n", 1073 ret); 1074 goto err_free_controls; 1075 } 1076 dev_info(s->dev, "Registered as %s\n", 1077 video_device_node_name(&s->vdev)); 1078 dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); 1079 return 0; 1080 1081 err_free_controls: 1082 v4l2_ctrl_handler_free(&s->hdl); 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 const 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"); 1109