1 /* 2 * HackRF 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 /* 28 * Used Avago MGA-81563 RF amplifier could be destroyed pretty easily with too 29 * strong signal or transmitting to bad antenna. 30 * Set RF gain control to 'grabbed' state by default for sure. 31 */ 32 static bool hackrf_enable_rf_gain_ctrl; 33 module_param_named(enable_rf_gain_ctrl, hackrf_enable_rf_gain_ctrl, bool, 0644); 34 MODULE_PARM_DESC(enable_rf_gain_ctrl, "enable RX/TX RF amplifier control (warn: could damage amplifier)"); 35 36 /* HackRF USB API commands (from HackRF Library) */ 37 enum { 38 CMD_SET_TRANSCEIVER_MODE = 0x01, 39 CMD_SAMPLE_RATE_SET = 0x06, 40 CMD_BASEBAND_FILTER_BANDWIDTH_SET = 0x07, 41 CMD_BOARD_ID_READ = 0x0e, 42 CMD_VERSION_STRING_READ = 0x0f, 43 CMD_SET_FREQ = 0x10, 44 CMD_AMP_ENABLE = 0x11, 45 CMD_SET_LNA_GAIN = 0x13, 46 CMD_SET_VGA_GAIN = 0x14, 47 CMD_SET_TXVGA_GAIN = 0x15, 48 }; 49 50 /* 51 * bEndpointAddress 0x81 EP 1 IN 52 * Transfer Type Bulk 53 * wMaxPacketSize 0x0200 1x 512 bytes 54 */ 55 #define MAX_BULK_BUFS (6) 56 #define BULK_BUFFER_SIZE (128 * 512) 57 58 static const struct v4l2_frequency_band bands_adc_dac[] = { 59 { 60 .tuner = 0, 61 .type = V4L2_TUNER_SDR, 62 .index = 0, 63 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 64 .rangelow = 200000, 65 .rangehigh = 24000000, 66 }, 67 }; 68 69 static const struct v4l2_frequency_band bands_rx_tx[] = { 70 { 71 .tuner = 1, 72 .type = V4L2_TUNER_RF, 73 .index = 0, 74 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 75 .rangelow = 1, 76 .rangehigh = 4294967294LL, /* max u32, hw goes over 7GHz */ 77 }, 78 }; 79 80 /* stream formats */ 81 struct hackrf_format { 82 u32 pixelformat; 83 u32 buffersize; 84 }; 85 86 /* format descriptions for capture and preview */ 87 static struct hackrf_format formats[] = { 88 { 89 .pixelformat = V4L2_SDR_FMT_CS8, 90 .buffersize = BULK_BUFFER_SIZE, 91 }, 92 }; 93 94 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); 95 96 /* intermediate buffers with raw data from the USB device */ 97 struct hackrf_buffer { 98 struct vb2_v4l2_buffer vb; 99 struct list_head list; 100 }; 101 102 struct hackrf_dev { 103 #define USB_STATE_URB_BUF 1 /* XXX: set manually */ 104 #define RX_ON 4 105 #define TX_ON 5 106 #define RX_ADC_FREQUENCY 11 107 #define TX_DAC_FREQUENCY 12 108 #define RX_BANDWIDTH 13 109 #define TX_BANDWIDTH 14 110 #define RX_RF_FREQUENCY 15 111 #define TX_RF_FREQUENCY 16 112 #define RX_RF_GAIN 17 113 #define TX_RF_GAIN 18 114 #define RX_IF_GAIN 19 115 #define RX_LNA_GAIN 20 116 #define TX_LNA_GAIN 21 117 unsigned long flags; 118 119 struct usb_interface *intf; 120 struct device *dev; 121 struct usb_device *udev; 122 struct video_device rx_vdev; 123 struct video_device tx_vdev; 124 struct v4l2_device v4l2_dev; 125 126 /* videobuf2 queue and queued buffers list */ 127 struct vb2_queue rx_vb2_queue; 128 struct vb2_queue tx_vb2_queue; 129 struct list_head rx_buffer_list; 130 struct list_head tx_buffer_list; 131 spinlock_t buffer_list_lock; /* Protects buffer_list */ 132 unsigned int sequence; /* Buffer sequence counter */ 133 unsigned int vb_full; /* vb is full and packets dropped */ 134 unsigned int vb_empty; /* vb is empty and packets dropped */ 135 136 /* Note if taking both locks v4l2_lock must always be locked first! */ 137 struct mutex v4l2_lock; /* Protects everything else */ 138 struct mutex vb_queue_lock; /* Protects vb_queue */ 139 140 struct urb *urb_list[MAX_BULK_BUFS]; 141 int buf_num; 142 unsigned long buf_size; 143 u8 *buf_list[MAX_BULK_BUFS]; 144 dma_addr_t dma_addr[MAX_BULK_BUFS]; 145 int urbs_initialized; 146 int urbs_submitted; 147 148 /* USB control message buffer */ 149 #define BUF_SIZE 24 150 u8 buf[BUF_SIZE]; 151 152 /* Current configuration */ 153 unsigned int f_adc; 154 unsigned int f_dac; 155 unsigned int f_rx; 156 unsigned int f_tx; 157 u32 pixelformat; 158 u32 buffersize; 159 160 /* Controls */ 161 struct v4l2_ctrl_handler rx_ctrl_handler; 162 struct v4l2_ctrl *rx_bandwidth_auto; 163 struct v4l2_ctrl *rx_bandwidth; 164 struct v4l2_ctrl *rx_rf_gain; 165 struct v4l2_ctrl *rx_lna_gain; 166 struct v4l2_ctrl *rx_if_gain; 167 struct v4l2_ctrl_handler tx_ctrl_handler; 168 struct v4l2_ctrl *tx_bandwidth_auto; 169 struct v4l2_ctrl *tx_bandwidth; 170 struct v4l2_ctrl *tx_rf_gain; 171 struct v4l2_ctrl *tx_lna_gain; 172 173 /* Sample rate calc */ 174 unsigned long jiffies_next; 175 unsigned int sample; 176 unsigned int sample_measured; 177 }; 178 179 #define hackrf_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \ 180 char *_direction; \ 181 if (_t & USB_DIR_IN) \ 182 _direction = "<<<"; \ 183 else \ 184 _direction = ">>>"; \ 185 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \ 186 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, \ 187 _i >> 8, _l & 0xff, _l >> 8, _direction, _l, _b); \ 188 } 189 190 /* execute firmware command */ 191 static int hackrf_ctrl_msg(struct hackrf_dev *dev, u8 request, u16 value, 192 u16 index, u8 *data, u16 size) 193 { 194 int ret; 195 unsigned int pipe; 196 u8 requesttype; 197 198 switch (request) { 199 case CMD_SET_TRANSCEIVER_MODE: 200 case CMD_SET_FREQ: 201 case CMD_AMP_ENABLE: 202 case CMD_SAMPLE_RATE_SET: 203 case CMD_BASEBAND_FILTER_BANDWIDTH_SET: 204 pipe = usb_sndctrlpipe(dev->udev, 0); 205 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT); 206 break; 207 case CMD_BOARD_ID_READ: 208 case CMD_VERSION_STRING_READ: 209 case CMD_SET_LNA_GAIN: 210 case CMD_SET_VGA_GAIN: 211 case CMD_SET_TXVGA_GAIN: 212 pipe = usb_rcvctrlpipe(dev->udev, 0); 213 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN); 214 break; 215 default: 216 dev_err(dev->dev, "Unknown command %02x\n", request); 217 ret = -EINVAL; 218 goto err; 219 } 220 221 /* write request */ 222 if (!(requesttype & USB_DIR_IN)) 223 memcpy(dev->buf, data, size); 224 225 ret = usb_control_msg(dev->udev, pipe, request, requesttype, value, 226 index, dev->buf, size, 1000); 227 hackrf_dbg_usb_control_msg(dev->dev, request, requesttype, value, 228 index, dev->buf, size); 229 if (ret < 0) { 230 dev_err(dev->dev, "usb_control_msg() failed %d request %02x\n", 231 ret, request); 232 goto err; 233 } 234 235 /* read request */ 236 if (requesttype & USB_DIR_IN) 237 memcpy(data, dev->buf, size); 238 239 return 0; 240 err: 241 return ret; 242 } 243 244 static int hackrf_set_params(struct hackrf_dev *dev) 245 { 246 struct usb_interface *intf = dev->intf; 247 int ret, i; 248 u8 buf[8], u8tmp; 249 unsigned int uitmp, uitmp1, uitmp2; 250 const bool rx = test_bit(RX_ON, &dev->flags); 251 const bool tx = test_bit(TX_ON, &dev->flags); 252 static const struct { 253 u32 freq; 254 } bandwidth_lut[] = { 255 { 1750000}, /* 1.75 MHz */ 256 { 2500000}, /* 2.5 MHz */ 257 { 3500000}, /* 3.5 MHz */ 258 { 5000000}, /* 5 MHz */ 259 { 5500000}, /* 5.5 MHz */ 260 { 6000000}, /* 6 MHz */ 261 { 7000000}, /* 7 MHz */ 262 { 8000000}, /* 8 MHz */ 263 { 9000000}, /* 9 MHz */ 264 {10000000}, /* 10 MHz */ 265 {12000000}, /* 12 MHz */ 266 {14000000}, /* 14 MHz */ 267 {15000000}, /* 15 MHz */ 268 {20000000}, /* 20 MHz */ 269 {24000000}, /* 24 MHz */ 270 {28000000}, /* 28 MHz */ 271 }; 272 273 if (!rx && !tx) { 274 dev_dbg(&intf->dev, "device is sleeping\n"); 275 return 0; 276 } 277 278 /* ADC / DAC frequency */ 279 if (rx && test_and_clear_bit(RX_ADC_FREQUENCY, &dev->flags)) { 280 dev_dbg(&intf->dev, "RX ADC frequency=%u Hz\n", dev->f_adc); 281 uitmp1 = dev->f_adc; 282 uitmp2 = 1; 283 set_bit(TX_DAC_FREQUENCY, &dev->flags); 284 } else if (tx && test_and_clear_bit(TX_DAC_FREQUENCY, &dev->flags)) { 285 dev_dbg(&intf->dev, "TX DAC frequency=%u Hz\n", dev->f_dac); 286 uitmp1 = dev->f_dac; 287 uitmp2 = 1; 288 set_bit(RX_ADC_FREQUENCY, &dev->flags); 289 } else { 290 uitmp1 = uitmp2 = 0; 291 } 292 if (uitmp1 || uitmp2) { 293 buf[0] = (uitmp1 >> 0) & 0xff; 294 buf[1] = (uitmp1 >> 8) & 0xff; 295 buf[2] = (uitmp1 >> 16) & 0xff; 296 buf[3] = (uitmp1 >> 24) & 0xff; 297 buf[4] = (uitmp2 >> 0) & 0xff; 298 buf[5] = (uitmp2 >> 8) & 0xff; 299 buf[6] = (uitmp2 >> 16) & 0xff; 300 buf[7] = (uitmp2 >> 24) & 0xff; 301 ret = hackrf_ctrl_msg(dev, CMD_SAMPLE_RATE_SET, 0, 0, buf, 8); 302 if (ret) 303 goto err; 304 } 305 306 /* bandwidth */ 307 if (rx && test_and_clear_bit(RX_BANDWIDTH, &dev->flags)) { 308 if (dev->rx_bandwidth_auto->val == true) 309 uitmp = dev->f_adc; 310 else 311 uitmp = dev->rx_bandwidth->val; 312 313 for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) { 314 if (uitmp <= bandwidth_lut[i].freq) { 315 uitmp = bandwidth_lut[i].freq; 316 break; 317 } 318 } 319 dev->rx_bandwidth->val = uitmp; 320 dev->rx_bandwidth->cur.val = uitmp; 321 dev_dbg(&intf->dev, "RX bandwidth selected=%u\n", uitmp); 322 set_bit(TX_BANDWIDTH, &dev->flags); 323 } else if (tx && test_and_clear_bit(TX_BANDWIDTH, &dev->flags)) { 324 if (dev->tx_bandwidth_auto->val == true) 325 uitmp = dev->f_dac; 326 else 327 uitmp = dev->tx_bandwidth->val; 328 329 for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) { 330 if (uitmp <= bandwidth_lut[i].freq) { 331 uitmp = bandwidth_lut[i].freq; 332 break; 333 } 334 } 335 dev->tx_bandwidth->val = uitmp; 336 dev->tx_bandwidth->cur.val = uitmp; 337 dev_dbg(&intf->dev, "TX bandwidth selected=%u\n", uitmp); 338 set_bit(RX_BANDWIDTH, &dev->flags); 339 } else { 340 uitmp = 0; 341 } 342 if (uitmp) { 343 uitmp1 = uitmp2 = 0; 344 uitmp1 |= ((uitmp >> 0) & 0xff) << 0; 345 uitmp1 |= ((uitmp >> 8) & 0xff) << 8; 346 uitmp2 |= ((uitmp >> 16) & 0xff) << 0; 347 uitmp2 |= ((uitmp >> 24) & 0xff) << 8; 348 ret = hackrf_ctrl_msg(dev, CMD_BASEBAND_FILTER_BANDWIDTH_SET, 349 uitmp1, uitmp2, NULL, 0); 350 if (ret) 351 goto err; 352 } 353 354 /* RX / TX RF frequency */ 355 if (rx && test_and_clear_bit(RX_RF_FREQUENCY, &dev->flags)) { 356 dev_dbg(&intf->dev, "RX RF frequency=%u Hz\n", dev->f_rx); 357 uitmp1 = dev->f_rx / 1000000; 358 uitmp2 = dev->f_rx % 1000000; 359 set_bit(TX_RF_FREQUENCY, &dev->flags); 360 } else if (tx && test_and_clear_bit(TX_RF_FREQUENCY, &dev->flags)) { 361 dev_dbg(&intf->dev, "TX RF frequency=%u Hz\n", dev->f_tx); 362 uitmp1 = dev->f_tx / 1000000; 363 uitmp2 = dev->f_tx % 1000000; 364 set_bit(RX_RF_FREQUENCY, &dev->flags); 365 } else { 366 uitmp1 = uitmp2 = 0; 367 } 368 if (uitmp1 || uitmp2) { 369 buf[0] = (uitmp1 >> 0) & 0xff; 370 buf[1] = (uitmp1 >> 8) & 0xff; 371 buf[2] = (uitmp1 >> 16) & 0xff; 372 buf[3] = (uitmp1 >> 24) & 0xff; 373 buf[4] = (uitmp2 >> 0) & 0xff; 374 buf[5] = (uitmp2 >> 8) & 0xff; 375 buf[6] = (uitmp2 >> 16) & 0xff; 376 buf[7] = (uitmp2 >> 24) & 0xff; 377 ret = hackrf_ctrl_msg(dev, CMD_SET_FREQ, 0, 0, buf, 8); 378 if (ret) 379 goto err; 380 } 381 382 /* RX RF gain */ 383 if (rx && test_and_clear_bit(RX_RF_GAIN, &dev->flags)) { 384 dev_dbg(&intf->dev, "RX RF gain val=%d->%d\n", 385 dev->rx_rf_gain->cur.val, dev->rx_rf_gain->val); 386 387 u8tmp = (dev->rx_rf_gain->val) ? 1 : 0; 388 ret = hackrf_ctrl_msg(dev, CMD_AMP_ENABLE, u8tmp, 0, NULL, 0); 389 if (ret) 390 goto err; 391 set_bit(TX_RF_GAIN, &dev->flags); 392 } 393 394 /* TX RF gain */ 395 if (tx && test_and_clear_bit(TX_RF_GAIN, &dev->flags)) { 396 dev_dbg(&intf->dev, "TX RF gain val=%d->%d\n", 397 dev->tx_rf_gain->cur.val, dev->tx_rf_gain->val); 398 399 u8tmp = (dev->tx_rf_gain->val) ? 1 : 0; 400 ret = hackrf_ctrl_msg(dev, CMD_AMP_ENABLE, u8tmp, 0, NULL, 0); 401 if (ret) 402 goto err; 403 set_bit(RX_RF_GAIN, &dev->flags); 404 } 405 406 /* RX LNA gain */ 407 if (rx && test_and_clear_bit(RX_LNA_GAIN, &dev->flags)) { 408 dev_dbg(dev->dev, "RX LNA gain val=%d->%d\n", 409 dev->rx_lna_gain->cur.val, dev->rx_lna_gain->val); 410 411 ret = hackrf_ctrl_msg(dev, CMD_SET_LNA_GAIN, 0, 412 dev->rx_lna_gain->val, &u8tmp, 1); 413 if (ret) 414 goto err; 415 } 416 417 /* RX IF gain */ 418 if (rx && test_and_clear_bit(RX_IF_GAIN, &dev->flags)) { 419 dev_dbg(&intf->dev, "IF gain val=%d->%d\n", 420 dev->rx_if_gain->cur.val, dev->rx_if_gain->val); 421 422 ret = hackrf_ctrl_msg(dev, CMD_SET_VGA_GAIN, 0, 423 dev->rx_if_gain->val, &u8tmp, 1); 424 if (ret) 425 goto err; 426 } 427 428 /* TX LNA gain */ 429 if (tx && test_and_clear_bit(TX_LNA_GAIN, &dev->flags)) { 430 dev_dbg(&intf->dev, "TX LNA gain val=%d->%d\n", 431 dev->tx_lna_gain->cur.val, dev->tx_lna_gain->val); 432 433 ret = hackrf_ctrl_msg(dev, CMD_SET_TXVGA_GAIN, 0, 434 dev->tx_lna_gain->val, &u8tmp, 1); 435 if (ret) 436 goto err; 437 } 438 439 return 0; 440 err: 441 dev_dbg(&intf->dev, "failed=%d\n", ret); 442 return ret; 443 } 444 445 /* Private functions */ 446 static struct hackrf_buffer *hackrf_get_next_buffer(struct hackrf_dev *dev, 447 struct list_head *buffer_list) 448 { 449 unsigned long flags; 450 struct hackrf_buffer *buffer = NULL; 451 452 spin_lock_irqsave(&dev->buffer_list_lock, flags); 453 if (list_empty(buffer_list)) 454 goto leave; 455 456 buffer = list_entry(buffer_list->next, struct hackrf_buffer, list); 457 list_del(&buffer->list); 458 leave: 459 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 460 return buffer; 461 } 462 463 static void hackrf_copy_stream(struct hackrf_dev *dev, void *dst, void *src, 464 unsigned int src_len) 465 { 466 memcpy(dst, src, src_len); 467 468 /* calculate sample rate and output it in 10 seconds intervals */ 469 if (unlikely(time_is_before_jiffies(dev->jiffies_next))) { 470 #define MSECS 10000UL 471 unsigned int msecs = jiffies_to_msecs(jiffies - 472 dev->jiffies_next + msecs_to_jiffies(MSECS)); 473 unsigned int samples = dev->sample - dev->sample_measured; 474 475 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS); 476 dev->sample_measured = dev->sample; 477 dev_dbg(dev->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n", 478 src_len, samples, msecs, 479 samples * 1000UL / msecs); 480 } 481 482 /* total number of samples */ 483 dev->sample += src_len / 2; 484 } 485 486 /* 487 * This gets called for the bulk stream pipe. This is done in interrupt 488 * time, so it has to be fast, not crash, and not stall. Neat. 489 */ 490 static void hackrf_urb_complete_in(struct urb *urb) 491 { 492 struct hackrf_dev *dev = urb->context; 493 struct usb_interface *intf = dev->intf; 494 struct hackrf_buffer *buffer; 495 unsigned int len; 496 497 dev_dbg_ratelimited(&intf->dev, "status=%d length=%u/%u\n", urb->status, 498 urb->actual_length, urb->transfer_buffer_length); 499 500 switch (urb->status) { 501 case 0: /* success */ 502 case -ETIMEDOUT: /* NAK */ 503 break; 504 case -ECONNRESET: /* kill */ 505 case -ENOENT: 506 case -ESHUTDOWN: 507 return; 508 default: /* error */ 509 dev_err_ratelimited(&intf->dev, "URB failed %d\n", urb->status); 510 goto exit_usb_submit_urb; 511 } 512 513 /* get buffer to write */ 514 buffer = hackrf_get_next_buffer(dev, &dev->rx_buffer_list); 515 if (unlikely(buffer == NULL)) { 516 dev->vb_full++; 517 dev_notice_ratelimited(&intf->dev, 518 "buffer is full - %u packets dropped\n", 519 dev->vb_full); 520 goto exit_usb_submit_urb; 521 } 522 523 len = min_t(unsigned long, vb2_plane_size(&buffer->vb.vb2_buf, 0), 524 urb->actual_length); 525 hackrf_copy_stream(dev, vb2_plane_vaddr(&buffer->vb.vb2_buf, 0), 526 urb->transfer_buffer, len); 527 vb2_set_plane_payload(&buffer->vb.vb2_buf, 0, len); 528 buffer->vb.sequence = dev->sequence++; 529 buffer->vb.vb2_buf.timestamp = ktime_get_ns(); 530 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_DONE); 531 exit_usb_submit_urb: 532 usb_submit_urb(urb, GFP_ATOMIC); 533 } 534 535 static void hackrf_urb_complete_out(struct urb *urb) 536 { 537 struct hackrf_dev *dev = urb->context; 538 struct usb_interface *intf = dev->intf; 539 struct hackrf_buffer *buffer; 540 unsigned int len; 541 542 dev_dbg_ratelimited(&intf->dev, "status=%d length=%u/%u\n", urb->status, 543 urb->actual_length, urb->transfer_buffer_length); 544 545 switch (urb->status) { 546 case 0: /* success */ 547 case -ETIMEDOUT: /* NAK */ 548 break; 549 case -ECONNRESET: /* kill */ 550 case -ENOENT: 551 case -ESHUTDOWN: 552 return; 553 default: /* error */ 554 dev_err_ratelimited(&intf->dev, "URB failed %d\n", urb->status); 555 } 556 557 /* get buffer to read */ 558 buffer = hackrf_get_next_buffer(dev, &dev->tx_buffer_list); 559 if (unlikely(buffer == NULL)) { 560 dev->vb_empty++; 561 dev_notice_ratelimited(&intf->dev, 562 "buffer is empty - %u packets dropped\n", 563 dev->vb_empty); 564 urb->actual_length = 0; 565 goto exit_usb_submit_urb; 566 } 567 568 len = min_t(unsigned long, urb->transfer_buffer_length, 569 vb2_get_plane_payload(&buffer->vb.vb2_buf, 0)); 570 hackrf_copy_stream(dev, urb->transfer_buffer, 571 vb2_plane_vaddr(&buffer->vb.vb2_buf, 0), len); 572 urb->actual_length = len; 573 buffer->vb.sequence = dev->sequence++; 574 buffer->vb.vb2_buf.timestamp = ktime_get_ns(); 575 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_DONE); 576 exit_usb_submit_urb: 577 usb_submit_urb(urb, GFP_ATOMIC); 578 } 579 580 static int hackrf_kill_urbs(struct hackrf_dev *dev) 581 { 582 int i; 583 584 for (i = dev->urbs_submitted - 1; i >= 0; i--) { 585 dev_dbg(dev->dev, "kill urb=%d\n", i); 586 /* stop the URB */ 587 usb_kill_urb(dev->urb_list[i]); 588 } 589 dev->urbs_submitted = 0; 590 591 return 0; 592 } 593 594 static int hackrf_submit_urbs(struct hackrf_dev *dev) 595 { 596 int i, ret; 597 598 for (i = 0; i < dev->urbs_initialized; i++) { 599 dev_dbg(dev->dev, "submit urb=%d\n", i); 600 ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC); 601 if (ret) { 602 dev_err(dev->dev, "Could not submit URB no. %d - get them all back\n", 603 i); 604 hackrf_kill_urbs(dev); 605 return ret; 606 } 607 dev->urbs_submitted++; 608 } 609 610 return 0; 611 } 612 613 static int hackrf_free_stream_bufs(struct hackrf_dev *dev) 614 { 615 if (dev->flags & USB_STATE_URB_BUF) { 616 while (dev->buf_num) { 617 dev->buf_num--; 618 dev_dbg(dev->dev, "free buf=%d\n", dev->buf_num); 619 usb_free_coherent(dev->udev, dev->buf_size, 620 dev->buf_list[dev->buf_num], 621 dev->dma_addr[dev->buf_num]); 622 } 623 } 624 dev->flags &= ~USB_STATE_URB_BUF; 625 626 return 0; 627 } 628 629 static int hackrf_alloc_stream_bufs(struct hackrf_dev *dev) 630 { 631 dev->buf_num = 0; 632 dev->buf_size = BULK_BUFFER_SIZE; 633 634 dev_dbg(dev->dev, "all in all I will use %u bytes for streaming\n", 635 MAX_BULK_BUFS * BULK_BUFFER_SIZE); 636 637 for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) { 638 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev, 639 BULK_BUFFER_SIZE, GFP_ATOMIC, 640 &dev->dma_addr[dev->buf_num]); 641 if (!dev->buf_list[dev->buf_num]) { 642 dev_dbg(dev->dev, "alloc buf=%d failed\n", 643 dev->buf_num); 644 hackrf_free_stream_bufs(dev); 645 return -ENOMEM; 646 } 647 648 dev_dbg(dev->dev, "alloc buf=%d %p (dma %llu)\n", dev->buf_num, 649 dev->buf_list[dev->buf_num], 650 (long long)dev->dma_addr[dev->buf_num]); 651 dev->flags |= USB_STATE_URB_BUF; 652 } 653 654 return 0; 655 } 656 657 static int hackrf_free_urbs(struct hackrf_dev *dev) 658 { 659 int i; 660 661 hackrf_kill_urbs(dev); 662 663 for (i = dev->urbs_initialized - 1; i >= 0; i--) { 664 if (dev->urb_list[i]) { 665 dev_dbg(dev->dev, "free urb=%d\n", i); 666 /* free the URBs */ 667 usb_free_urb(dev->urb_list[i]); 668 } 669 } 670 dev->urbs_initialized = 0; 671 672 return 0; 673 } 674 675 static int hackrf_alloc_urbs(struct hackrf_dev *dev, bool rcv) 676 { 677 int i, j; 678 unsigned int pipe; 679 usb_complete_t complete; 680 681 if (rcv) { 682 pipe = usb_rcvbulkpipe(dev->udev, 0x81); 683 complete = &hackrf_urb_complete_in; 684 } else { 685 pipe = usb_sndbulkpipe(dev->udev, 0x02); 686 complete = &hackrf_urb_complete_out; 687 } 688 689 /* allocate the URBs */ 690 for (i = 0; i < MAX_BULK_BUFS; i++) { 691 dev_dbg(dev->dev, "alloc urb=%d\n", i); 692 dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); 693 if (!dev->urb_list[i]) { 694 for (j = 0; j < i; j++) 695 usb_free_urb(dev->urb_list[j]); 696 return -ENOMEM; 697 } 698 usb_fill_bulk_urb(dev->urb_list[i], 699 dev->udev, 700 pipe, 701 dev->buf_list[i], 702 BULK_BUFFER_SIZE, 703 complete, dev); 704 705 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 706 dev->urb_list[i]->transfer_dma = dev->dma_addr[i]; 707 dev->urbs_initialized++; 708 } 709 710 return 0; 711 } 712 713 /* The user yanked out the cable... */ 714 static void hackrf_disconnect(struct usb_interface *intf) 715 { 716 struct v4l2_device *v = usb_get_intfdata(intf); 717 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev); 718 719 dev_dbg(dev->dev, "\n"); 720 721 mutex_lock(&dev->vb_queue_lock); 722 mutex_lock(&dev->v4l2_lock); 723 /* No need to keep the urbs around after disconnection */ 724 dev->udev = NULL; 725 v4l2_device_disconnect(&dev->v4l2_dev); 726 video_unregister_device(&dev->tx_vdev); 727 video_unregister_device(&dev->rx_vdev); 728 mutex_unlock(&dev->v4l2_lock); 729 mutex_unlock(&dev->vb_queue_lock); 730 731 v4l2_device_put(&dev->v4l2_dev); 732 } 733 734 /* Videobuf2 operations */ 735 static void hackrf_return_all_buffers(struct vb2_queue *vq, 736 enum vb2_buffer_state state) 737 { 738 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 739 struct usb_interface *intf = dev->intf; 740 struct hackrf_buffer *buffer, *node; 741 struct list_head *buffer_list; 742 unsigned long flags; 743 744 dev_dbg(&intf->dev, "\n"); 745 746 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 747 buffer_list = &dev->rx_buffer_list; 748 else 749 buffer_list = &dev->tx_buffer_list; 750 751 spin_lock_irqsave(&dev->buffer_list_lock, flags); 752 list_for_each_entry_safe(buffer, node, buffer_list, list) { 753 dev_dbg(&intf->dev, "list_for_each_entry_safe\n"); 754 vb2_buffer_done(&buffer->vb.vb2_buf, state); 755 list_del(&buffer->list); 756 } 757 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 758 } 759 760 static int hackrf_queue_setup(struct vb2_queue *vq, 761 unsigned int *nbuffers, 762 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 763 { 764 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 765 766 dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers); 767 768 /* Need at least 8 buffers */ 769 if (vq->num_buffers + *nbuffers < 8) 770 *nbuffers = 8 - vq->num_buffers; 771 *nplanes = 1; 772 sizes[0] = PAGE_ALIGN(dev->buffersize); 773 774 dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]); 775 return 0; 776 } 777 778 static void hackrf_buf_queue(struct vb2_buffer *vb) 779 { 780 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 781 struct vb2_queue *vq = vb->vb2_queue; 782 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 783 struct hackrf_buffer *buffer = container_of(vbuf, struct hackrf_buffer, vb); 784 struct list_head *buffer_list; 785 unsigned long flags; 786 787 dev_dbg_ratelimited(&dev->intf->dev, "\n"); 788 789 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 790 buffer_list = &dev->rx_buffer_list; 791 else 792 buffer_list = &dev->tx_buffer_list; 793 794 spin_lock_irqsave(&dev->buffer_list_lock, flags); 795 list_add_tail(&buffer->list, buffer_list); 796 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 797 } 798 799 static int hackrf_start_streaming(struct vb2_queue *vq, unsigned int count) 800 { 801 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 802 struct usb_interface *intf = dev->intf; 803 int ret; 804 unsigned int mode; 805 806 dev_dbg(&intf->dev, "count=%i\n", count); 807 808 mutex_lock(&dev->v4l2_lock); 809 810 /* Allow only RX or TX, not both same time */ 811 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) { 812 if (test_bit(TX_ON, &dev->flags)) { 813 ret = -EBUSY; 814 goto err_hackrf_return_all_buffers; 815 } 816 817 mode = 1; 818 set_bit(RX_ON, &dev->flags); 819 } else { 820 if (test_bit(RX_ON, &dev->flags)) { 821 ret = -EBUSY; 822 goto err_hackrf_return_all_buffers; 823 } 824 825 mode = 2; 826 set_bit(TX_ON, &dev->flags); 827 } 828 829 dev->sequence = 0; 830 831 ret = hackrf_alloc_stream_bufs(dev); 832 if (ret) 833 goto err; 834 835 ret = hackrf_alloc_urbs(dev, (mode == 1)); 836 if (ret) 837 goto err; 838 839 ret = hackrf_submit_urbs(dev); 840 if (ret) 841 goto err; 842 843 ret = hackrf_set_params(dev); 844 if (ret) 845 goto err; 846 847 /* start hardware streaming */ 848 ret = hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, mode, 0, NULL, 0); 849 if (ret) 850 goto err; 851 852 mutex_unlock(&dev->v4l2_lock); 853 854 return 0; 855 err: 856 hackrf_kill_urbs(dev); 857 hackrf_free_urbs(dev); 858 hackrf_free_stream_bufs(dev); 859 clear_bit(RX_ON, &dev->flags); 860 clear_bit(TX_ON, &dev->flags); 861 err_hackrf_return_all_buffers: 862 hackrf_return_all_buffers(vq, VB2_BUF_STATE_QUEUED); 863 mutex_unlock(&dev->v4l2_lock); 864 dev_dbg(&intf->dev, "failed=%d\n", ret); 865 return ret; 866 } 867 868 static void hackrf_stop_streaming(struct vb2_queue *vq) 869 { 870 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 871 struct usb_interface *intf = dev->intf; 872 873 dev_dbg(&intf->dev, "\n"); 874 875 mutex_lock(&dev->v4l2_lock); 876 877 /* stop hardware streaming */ 878 hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 0, 0, NULL, 0); 879 880 hackrf_kill_urbs(dev); 881 hackrf_free_urbs(dev); 882 hackrf_free_stream_bufs(dev); 883 884 hackrf_return_all_buffers(vq, VB2_BUF_STATE_ERROR); 885 886 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 887 clear_bit(RX_ON, &dev->flags); 888 else 889 clear_bit(TX_ON, &dev->flags); 890 891 mutex_unlock(&dev->v4l2_lock); 892 } 893 894 static const struct vb2_ops hackrf_vb2_ops = { 895 .queue_setup = hackrf_queue_setup, 896 .buf_queue = hackrf_buf_queue, 897 .start_streaming = hackrf_start_streaming, 898 .stop_streaming = hackrf_stop_streaming, 899 .wait_prepare = vb2_ops_wait_prepare, 900 .wait_finish = vb2_ops_wait_finish, 901 }; 902 903 static int hackrf_querycap(struct file *file, void *fh, 904 struct v4l2_capability *cap) 905 { 906 struct hackrf_dev *dev = video_drvdata(file); 907 struct usb_interface *intf = dev->intf; 908 struct video_device *vdev = video_devdata(file); 909 910 dev_dbg(&intf->dev, "\n"); 911 912 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; 913 if (vdev->vfl_dir == VFL_DIR_RX) 914 cap->device_caps |= V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER; 915 else 916 cap->device_caps |= V4L2_CAP_SDR_OUTPUT | V4L2_CAP_MODULATOR; 917 918 cap->capabilities = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER | 919 V4L2_CAP_SDR_OUTPUT | V4L2_CAP_MODULATOR | 920 V4L2_CAP_DEVICE_CAPS | cap->device_caps; 921 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 922 strlcpy(cap->card, dev->rx_vdev.name, sizeof(cap->card)); 923 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 924 925 return 0; 926 } 927 928 static int hackrf_s_fmt_sdr(struct file *file, void *priv, 929 struct v4l2_format *f) 930 { 931 struct hackrf_dev *dev = video_drvdata(file); 932 struct video_device *vdev = video_devdata(file); 933 struct vb2_queue *q; 934 int i; 935 936 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 937 (char *)&f->fmt.sdr.pixelformat); 938 939 if (vdev->vfl_dir == VFL_DIR_RX) 940 q = &dev->rx_vb2_queue; 941 else 942 q = &dev->tx_vb2_queue; 943 944 if (vb2_is_busy(q)) 945 return -EBUSY; 946 947 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 948 for (i = 0; i < NUM_FORMATS; i++) { 949 if (f->fmt.sdr.pixelformat == formats[i].pixelformat) { 950 dev->pixelformat = formats[i].pixelformat; 951 dev->buffersize = formats[i].buffersize; 952 f->fmt.sdr.buffersize = formats[i].buffersize; 953 return 0; 954 } 955 } 956 957 dev->pixelformat = formats[0].pixelformat; 958 dev->buffersize = formats[0].buffersize; 959 f->fmt.sdr.pixelformat = formats[0].pixelformat; 960 f->fmt.sdr.buffersize = formats[0].buffersize; 961 962 return 0; 963 } 964 965 static int hackrf_g_fmt_sdr(struct file *file, void *priv, 966 struct v4l2_format *f) 967 { 968 struct hackrf_dev *dev = video_drvdata(file); 969 970 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 971 (char *)&dev->pixelformat); 972 973 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 974 f->fmt.sdr.pixelformat = dev->pixelformat; 975 f->fmt.sdr.buffersize = dev->buffersize; 976 977 return 0; 978 } 979 980 static int hackrf_try_fmt_sdr(struct file *file, void *priv, 981 struct v4l2_format *f) 982 { 983 struct hackrf_dev *dev = video_drvdata(file); 984 int i; 985 986 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 987 (char *)&f->fmt.sdr.pixelformat); 988 989 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 990 for (i = 0; i < NUM_FORMATS; i++) { 991 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 992 f->fmt.sdr.buffersize = formats[i].buffersize; 993 return 0; 994 } 995 } 996 997 f->fmt.sdr.pixelformat = formats[0].pixelformat; 998 f->fmt.sdr.buffersize = formats[0].buffersize; 999 1000 return 0; 1001 } 1002 1003 static int hackrf_enum_fmt_sdr(struct file *file, void *priv, 1004 struct v4l2_fmtdesc *f) 1005 { 1006 struct hackrf_dev *dev = video_drvdata(file); 1007 1008 dev_dbg(dev->dev, "index=%d\n", f->index); 1009 1010 if (f->index >= NUM_FORMATS) 1011 return -EINVAL; 1012 1013 f->pixelformat = formats[f->index].pixelformat; 1014 1015 return 0; 1016 } 1017 1018 static int hackrf_s_tuner(struct file *file, void *priv, 1019 const struct v4l2_tuner *v) 1020 { 1021 struct hackrf_dev *dev = video_drvdata(file); 1022 int ret; 1023 1024 dev_dbg(dev->dev, "index=%d\n", v->index); 1025 1026 if (v->index == 0) 1027 ret = 0; 1028 else if (v->index == 1) 1029 ret = 0; 1030 else 1031 ret = -EINVAL; 1032 1033 return ret; 1034 } 1035 1036 static int hackrf_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) 1037 { 1038 struct hackrf_dev *dev = video_drvdata(file); 1039 int ret; 1040 1041 dev_dbg(dev->dev, "index=%d\n", v->index); 1042 1043 if (v->index == 0) { 1044 strlcpy(v->name, "HackRF ADC", sizeof(v->name)); 1045 v->type = V4L2_TUNER_SDR; 1046 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1047 v->rangelow = bands_adc_dac[0].rangelow; 1048 v->rangehigh = bands_adc_dac[0].rangehigh; 1049 ret = 0; 1050 } else if (v->index == 1) { 1051 strlcpy(v->name, "HackRF RF", sizeof(v->name)); 1052 v->type = V4L2_TUNER_RF; 1053 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1054 v->rangelow = bands_rx_tx[0].rangelow; 1055 v->rangehigh = bands_rx_tx[0].rangehigh; 1056 ret = 0; 1057 } else { 1058 ret = -EINVAL; 1059 } 1060 1061 return ret; 1062 } 1063 1064 static int hackrf_s_modulator(struct file *file, void *fh, 1065 const struct v4l2_modulator *a) 1066 { 1067 struct hackrf_dev *dev = video_drvdata(file); 1068 1069 dev_dbg(dev->dev, "index=%d\n", a->index); 1070 1071 return a->index > 1 ? -EINVAL : 0; 1072 } 1073 1074 static int hackrf_g_modulator(struct file *file, void *fh, 1075 struct v4l2_modulator *a) 1076 { 1077 struct hackrf_dev *dev = video_drvdata(file); 1078 int ret; 1079 1080 dev_dbg(dev->dev, "index=%d\n", a->index); 1081 1082 if (a->index == 0) { 1083 strlcpy(a->name, "HackRF DAC", sizeof(a->name)); 1084 a->type = V4L2_TUNER_SDR; 1085 a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1086 a->rangelow = bands_adc_dac[0].rangelow; 1087 a->rangehigh = bands_adc_dac[0].rangehigh; 1088 ret = 0; 1089 } else if (a->index == 1) { 1090 strlcpy(a->name, "HackRF RF", sizeof(a->name)); 1091 a->type = V4L2_TUNER_RF; 1092 a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1093 a->rangelow = bands_rx_tx[0].rangelow; 1094 a->rangehigh = bands_rx_tx[0].rangehigh; 1095 ret = 0; 1096 } else { 1097 ret = -EINVAL; 1098 } 1099 1100 return ret; 1101 } 1102 1103 static int hackrf_s_frequency(struct file *file, void *priv, 1104 const struct v4l2_frequency *f) 1105 { 1106 struct hackrf_dev *dev = video_drvdata(file); 1107 struct usb_interface *intf = dev->intf; 1108 struct video_device *vdev = video_devdata(file); 1109 int ret; 1110 unsigned int uitmp; 1111 1112 dev_dbg(&intf->dev, "tuner=%d type=%d frequency=%u\n", 1113 f->tuner, f->type, f->frequency); 1114 1115 if (f->tuner == 0) { 1116 uitmp = clamp(f->frequency, bands_adc_dac[0].rangelow, 1117 bands_adc_dac[0].rangehigh); 1118 if (vdev->vfl_dir == VFL_DIR_RX) { 1119 dev->f_adc = uitmp; 1120 set_bit(RX_ADC_FREQUENCY, &dev->flags); 1121 } else { 1122 dev->f_dac = uitmp; 1123 set_bit(TX_DAC_FREQUENCY, &dev->flags); 1124 } 1125 } else if (f->tuner == 1) { 1126 uitmp = clamp(f->frequency, bands_rx_tx[0].rangelow, 1127 bands_rx_tx[0].rangehigh); 1128 if (vdev->vfl_dir == VFL_DIR_RX) { 1129 dev->f_rx = uitmp; 1130 set_bit(RX_RF_FREQUENCY, &dev->flags); 1131 } else { 1132 dev->f_tx = uitmp; 1133 set_bit(TX_RF_FREQUENCY, &dev->flags); 1134 } 1135 } else { 1136 ret = -EINVAL; 1137 goto err; 1138 } 1139 1140 ret = hackrf_set_params(dev); 1141 if (ret) 1142 goto err; 1143 1144 return 0; 1145 err: 1146 dev_dbg(&intf->dev, "failed=%d\n", ret); 1147 return ret; 1148 } 1149 1150 static int hackrf_g_frequency(struct file *file, void *priv, 1151 struct v4l2_frequency *f) 1152 { 1153 struct hackrf_dev *dev = video_drvdata(file); 1154 struct usb_interface *intf = dev->intf; 1155 struct video_device *vdev = video_devdata(file); 1156 int ret; 1157 1158 dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type); 1159 1160 if (f->tuner == 0) { 1161 f->type = V4L2_TUNER_SDR; 1162 if (vdev->vfl_dir == VFL_DIR_RX) 1163 f->frequency = dev->f_adc; 1164 else 1165 f->frequency = dev->f_dac; 1166 } else if (f->tuner == 1) { 1167 f->type = V4L2_TUNER_RF; 1168 if (vdev->vfl_dir == VFL_DIR_RX) 1169 f->frequency = dev->f_rx; 1170 else 1171 f->frequency = dev->f_tx; 1172 } else { 1173 ret = -EINVAL; 1174 goto err; 1175 } 1176 1177 return 0; 1178 err: 1179 dev_dbg(&intf->dev, "failed=%d\n", ret); 1180 return ret; 1181 } 1182 1183 static int hackrf_enum_freq_bands(struct file *file, void *priv, 1184 struct v4l2_frequency_band *band) 1185 { 1186 struct hackrf_dev *dev = video_drvdata(file); 1187 int ret; 1188 1189 dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n", 1190 band->tuner, band->type, band->index); 1191 1192 if (band->tuner == 0) { 1193 if (band->index >= ARRAY_SIZE(bands_adc_dac)) { 1194 ret = -EINVAL; 1195 } else { 1196 *band = bands_adc_dac[band->index]; 1197 ret = 0; 1198 } 1199 } else if (band->tuner == 1) { 1200 if (band->index >= ARRAY_SIZE(bands_rx_tx)) { 1201 ret = -EINVAL; 1202 } else { 1203 *band = bands_rx_tx[band->index]; 1204 ret = 0; 1205 } 1206 } else { 1207 ret = -EINVAL; 1208 } 1209 1210 return ret; 1211 } 1212 1213 static const struct v4l2_ioctl_ops hackrf_ioctl_ops = { 1214 .vidioc_querycap = hackrf_querycap, 1215 1216 .vidioc_s_fmt_sdr_cap = hackrf_s_fmt_sdr, 1217 .vidioc_g_fmt_sdr_cap = hackrf_g_fmt_sdr, 1218 .vidioc_enum_fmt_sdr_cap = hackrf_enum_fmt_sdr, 1219 .vidioc_try_fmt_sdr_cap = hackrf_try_fmt_sdr, 1220 1221 .vidioc_s_fmt_sdr_out = hackrf_s_fmt_sdr, 1222 .vidioc_g_fmt_sdr_out = hackrf_g_fmt_sdr, 1223 .vidioc_enum_fmt_sdr_out = hackrf_enum_fmt_sdr, 1224 .vidioc_try_fmt_sdr_out = hackrf_try_fmt_sdr, 1225 1226 .vidioc_reqbufs = vb2_ioctl_reqbufs, 1227 .vidioc_create_bufs = vb2_ioctl_create_bufs, 1228 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 1229 .vidioc_querybuf = vb2_ioctl_querybuf, 1230 .vidioc_qbuf = vb2_ioctl_qbuf, 1231 .vidioc_dqbuf = vb2_ioctl_dqbuf, 1232 .vidioc_expbuf = vb2_ioctl_expbuf, 1233 1234 .vidioc_streamon = vb2_ioctl_streamon, 1235 .vidioc_streamoff = vb2_ioctl_streamoff, 1236 1237 .vidioc_s_tuner = hackrf_s_tuner, 1238 .vidioc_g_tuner = hackrf_g_tuner, 1239 1240 .vidioc_s_modulator = hackrf_s_modulator, 1241 .vidioc_g_modulator = hackrf_g_modulator, 1242 1243 .vidioc_s_frequency = hackrf_s_frequency, 1244 .vidioc_g_frequency = hackrf_g_frequency, 1245 .vidioc_enum_freq_bands = hackrf_enum_freq_bands, 1246 1247 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1248 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1249 .vidioc_log_status = v4l2_ctrl_log_status, 1250 }; 1251 1252 static const struct v4l2_file_operations hackrf_fops = { 1253 .owner = THIS_MODULE, 1254 .open = v4l2_fh_open, 1255 .release = vb2_fop_release, 1256 .read = vb2_fop_read, 1257 .write = vb2_fop_write, 1258 .poll = vb2_fop_poll, 1259 .mmap = vb2_fop_mmap, 1260 .unlocked_ioctl = video_ioctl2, 1261 }; 1262 1263 static const struct video_device hackrf_template = { 1264 .name = "HackRF One", 1265 .release = video_device_release_empty, 1266 .fops = &hackrf_fops, 1267 .ioctl_ops = &hackrf_ioctl_ops, 1268 }; 1269 1270 static void hackrf_video_release(struct v4l2_device *v) 1271 { 1272 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev); 1273 1274 dev_dbg(dev->dev, "\n"); 1275 1276 v4l2_ctrl_handler_free(&dev->rx_ctrl_handler); 1277 v4l2_ctrl_handler_free(&dev->tx_ctrl_handler); 1278 v4l2_device_unregister(&dev->v4l2_dev); 1279 kfree(dev); 1280 } 1281 1282 static int hackrf_s_ctrl_rx(struct v4l2_ctrl *ctrl) 1283 { 1284 struct hackrf_dev *dev = container_of(ctrl->handler, 1285 struct hackrf_dev, rx_ctrl_handler); 1286 struct usb_interface *intf = dev->intf; 1287 int ret; 1288 1289 switch (ctrl->id) { 1290 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1291 case V4L2_CID_RF_TUNER_BANDWIDTH: 1292 set_bit(RX_BANDWIDTH, &dev->flags); 1293 break; 1294 case V4L2_CID_RF_TUNER_RF_GAIN: 1295 set_bit(RX_RF_GAIN, &dev->flags); 1296 break; 1297 case V4L2_CID_RF_TUNER_LNA_GAIN: 1298 set_bit(RX_LNA_GAIN, &dev->flags); 1299 break; 1300 case V4L2_CID_RF_TUNER_IF_GAIN: 1301 set_bit(RX_IF_GAIN, &dev->flags); 1302 break; 1303 default: 1304 dev_dbg(&intf->dev, "unknown ctrl: id=%d name=%s\n", 1305 ctrl->id, ctrl->name); 1306 ret = -EINVAL; 1307 goto err; 1308 } 1309 1310 ret = hackrf_set_params(dev); 1311 if (ret) 1312 goto err; 1313 1314 return 0; 1315 err: 1316 dev_dbg(&intf->dev, "failed=%d\n", ret); 1317 return ret; 1318 } 1319 1320 static int hackrf_s_ctrl_tx(struct v4l2_ctrl *ctrl) 1321 { 1322 struct hackrf_dev *dev = container_of(ctrl->handler, 1323 struct hackrf_dev, tx_ctrl_handler); 1324 struct usb_interface *intf = dev->intf; 1325 int ret; 1326 1327 switch (ctrl->id) { 1328 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1329 case V4L2_CID_RF_TUNER_BANDWIDTH: 1330 set_bit(TX_BANDWIDTH, &dev->flags); 1331 break; 1332 case V4L2_CID_RF_TUNER_LNA_GAIN: 1333 set_bit(TX_LNA_GAIN, &dev->flags); 1334 break; 1335 case V4L2_CID_RF_TUNER_RF_GAIN: 1336 set_bit(TX_RF_GAIN, &dev->flags); 1337 break; 1338 default: 1339 dev_dbg(&intf->dev, "unknown ctrl: id=%d name=%s\n", 1340 ctrl->id, ctrl->name); 1341 ret = -EINVAL; 1342 goto err; 1343 } 1344 1345 ret = hackrf_set_params(dev); 1346 if (ret) 1347 goto err; 1348 1349 return 0; 1350 err: 1351 dev_dbg(&intf->dev, "failed=%d\n", ret); 1352 return ret; 1353 } 1354 1355 static const struct v4l2_ctrl_ops hackrf_ctrl_ops_rx = { 1356 .s_ctrl = hackrf_s_ctrl_rx, 1357 }; 1358 1359 static const struct v4l2_ctrl_ops hackrf_ctrl_ops_tx = { 1360 .s_ctrl = hackrf_s_ctrl_tx, 1361 }; 1362 1363 static int hackrf_probe(struct usb_interface *intf, 1364 const struct usb_device_id *id) 1365 { 1366 struct hackrf_dev *dev; 1367 int ret; 1368 u8 u8tmp, buf[BUF_SIZE]; 1369 1370 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1371 if (!dev) { 1372 ret = -ENOMEM; 1373 goto err; 1374 } 1375 1376 mutex_init(&dev->v4l2_lock); 1377 mutex_init(&dev->vb_queue_lock); 1378 spin_lock_init(&dev->buffer_list_lock); 1379 INIT_LIST_HEAD(&dev->rx_buffer_list); 1380 INIT_LIST_HEAD(&dev->tx_buffer_list); 1381 dev->intf = intf; 1382 dev->dev = &intf->dev; 1383 dev->udev = interface_to_usbdev(intf); 1384 dev->pixelformat = formats[0].pixelformat; 1385 dev->buffersize = formats[0].buffersize; 1386 dev->f_adc = bands_adc_dac[0].rangelow; 1387 dev->f_dac = bands_adc_dac[0].rangelow; 1388 dev->f_rx = bands_rx_tx[0].rangelow; 1389 dev->f_tx = bands_rx_tx[0].rangelow; 1390 set_bit(RX_ADC_FREQUENCY, &dev->flags); 1391 set_bit(TX_DAC_FREQUENCY, &dev->flags); 1392 set_bit(RX_RF_FREQUENCY, &dev->flags); 1393 set_bit(TX_RF_FREQUENCY, &dev->flags); 1394 1395 /* Detect device */ 1396 ret = hackrf_ctrl_msg(dev, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1); 1397 if (ret == 0) 1398 ret = hackrf_ctrl_msg(dev, CMD_VERSION_STRING_READ, 0, 0, 1399 buf, BUF_SIZE); 1400 if (ret) { 1401 dev_err(dev->dev, "Could not detect board\n"); 1402 goto err_kfree; 1403 } 1404 1405 buf[BUF_SIZE - 1] = '\0'; 1406 dev_info(dev->dev, "Board ID: %02x\n", u8tmp); 1407 dev_info(dev->dev, "Firmware version: %s\n", buf); 1408 1409 /* Init vb2 queue structure for receiver */ 1410 dev->rx_vb2_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE; 1411 dev->rx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | 1412 VB2_READ; 1413 dev->rx_vb2_queue.ops = &hackrf_vb2_ops; 1414 dev->rx_vb2_queue.mem_ops = &vb2_vmalloc_memops; 1415 dev->rx_vb2_queue.drv_priv = dev; 1416 dev->rx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer); 1417 dev->rx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1418 ret = vb2_queue_init(&dev->rx_vb2_queue); 1419 if (ret) { 1420 dev_err(dev->dev, "Could not initialize rx vb2 queue\n"); 1421 goto err_kfree; 1422 } 1423 1424 /* Init vb2 queue structure for transmitter */ 1425 dev->tx_vb2_queue.type = V4L2_BUF_TYPE_SDR_OUTPUT; 1426 dev->tx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | 1427 VB2_WRITE; 1428 dev->tx_vb2_queue.ops = &hackrf_vb2_ops; 1429 dev->tx_vb2_queue.mem_ops = &vb2_vmalloc_memops; 1430 dev->tx_vb2_queue.drv_priv = dev; 1431 dev->tx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer); 1432 dev->tx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1433 ret = vb2_queue_init(&dev->tx_vb2_queue); 1434 if (ret) { 1435 dev_err(dev->dev, "Could not initialize tx vb2 queue\n"); 1436 goto err_kfree; 1437 } 1438 1439 /* Register controls for receiver */ 1440 v4l2_ctrl_handler_init(&dev->rx_ctrl_handler, 5); 1441 dev->rx_bandwidth_auto = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1442 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 1443 0, 1, 0, 1); 1444 dev->rx_bandwidth = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1445 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH, 1446 1750000, 28000000, 50000, 1750000); 1447 v4l2_ctrl_auto_cluster(2, &dev->rx_bandwidth_auto, 0, false); 1448 dev->rx_rf_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1449 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 12, 12, 0); 1450 dev->rx_lna_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1451 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0); 1452 dev->rx_if_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1453 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0); 1454 if (dev->rx_ctrl_handler.error) { 1455 ret = dev->rx_ctrl_handler.error; 1456 dev_err(dev->dev, "Could not initialize controls\n"); 1457 goto err_v4l2_ctrl_handler_free_rx; 1458 } 1459 v4l2_ctrl_grab(dev->rx_rf_gain, !hackrf_enable_rf_gain_ctrl); 1460 v4l2_ctrl_handler_setup(&dev->rx_ctrl_handler); 1461 1462 /* Register controls for transmitter */ 1463 v4l2_ctrl_handler_init(&dev->tx_ctrl_handler, 4); 1464 dev->tx_bandwidth_auto = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1465 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 1466 0, 1, 0, 1); 1467 dev->tx_bandwidth = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1468 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH, 1469 1750000, 28000000, 50000, 1750000); 1470 v4l2_ctrl_auto_cluster(2, &dev->tx_bandwidth_auto, 0, false); 1471 dev->tx_lna_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1472 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 47, 1, 0); 1473 dev->tx_rf_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1474 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 15, 15, 0); 1475 if (dev->tx_ctrl_handler.error) { 1476 ret = dev->tx_ctrl_handler.error; 1477 dev_err(dev->dev, "Could not initialize controls\n"); 1478 goto err_v4l2_ctrl_handler_free_tx; 1479 } 1480 v4l2_ctrl_grab(dev->tx_rf_gain, !hackrf_enable_rf_gain_ctrl); 1481 v4l2_ctrl_handler_setup(&dev->tx_ctrl_handler); 1482 1483 /* Register the v4l2_device structure */ 1484 dev->v4l2_dev.release = hackrf_video_release; 1485 ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev); 1486 if (ret) { 1487 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret); 1488 goto err_v4l2_ctrl_handler_free_tx; 1489 } 1490 1491 /* Init video_device structure for receiver */ 1492 dev->rx_vdev = hackrf_template; 1493 dev->rx_vdev.queue = &dev->rx_vb2_queue; 1494 dev->rx_vdev.queue->lock = &dev->vb_queue_lock; 1495 dev->rx_vdev.v4l2_dev = &dev->v4l2_dev; 1496 dev->rx_vdev.ctrl_handler = &dev->rx_ctrl_handler; 1497 dev->rx_vdev.lock = &dev->v4l2_lock; 1498 dev->rx_vdev.vfl_dir = VFL_DIR_RX; 1499 video_set_drvdata(&dev->rx_vdev, dev); 1500 ret = video_register_device(&dev->rx_vdev, VFL_TYPE_SDR, -1); 1501 if (ret) { 1502 dev_err(dev->dev, 1503 "Failed to register as video device (%d)\n", ret); 1504 goto err_v4l2_device_unregister; 1505 } 1506 dev_info(dev->dev, "Registered as %s\n", 1507 video_device_node_name(&dev->rx_vdev)); 1508 1509 /* Init video_device structure for transmitter */ 1510 dev->tx_vdev = hackrf_template; 1511 dev->tx_vdev.queue = &dev->tx_vb2_queue; 1512 dev->tx_vdev.queue->lock = &dev->vb_queue_lock; 1513 dev->tx_vdev.v4l2_dev = &dev->v4l2_dev; 1514 dev->tx_vdev.ctrl_handler = &dev->tx_ctrl_handler; 1515 dev->tx_vdev.lock = &dev->v4l2_lock; 1516 dev->tx_vdev.vfl_dir = VFL_DIR_TX; 1517 video_set_drvdata(&dev->tx_vdev, dev); 1518 ret = video_register_device(&dev->tx_vdev, VFL_TYPE_SDR, -1); 1519 if (ret) { 1520 dev_err(dev->dev, 1521 "Failed to register as video device (%d)\n", ret); 1522 goto err_video_unregister_device_rx; 1523 } 1524 dev_info(dev->dev, "Registered as %s\n", 1525 video_device_node_name(&dev->tx_vdev)); 1526 1527 dev_notice(dev->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); 1528 return 0; 1529 err_video_unregister_device_rx: 1530 video_unregister_device(&dev->rx_vdev); 1531 err_v4l2_device_unregister: 1532 v4l2_device_unregister(&dev->v4l2_dev); 1533 err_v4l2_ctrl_handler_free_tx: 1534 v4l2_ctrl_handler_free(&dev->tx_ctrl_handler); 1535 err_v4l2_ctrl_handler_free_rx: 1536 v4l2_ctrl_handler_free(&dev->rx_ctrl_handler); 1537 err_kfree: 1538 kfree(dev); 1539 err: 1540 dev_dbg(&intf->dev, "failed=%d\n", ret); 1541 return ret; 1542 } 1543 1544 /* USB device ID list */ 1545 static const struct usb_device_id hackrf_id_table[] = { 1546 { USB_DEVICE(0x1d50, 0x6089) }, /* HackRF One */ 1547 { } 1548 }; 1549 MODULE_DEVICE_TABLE(usb, hackrf_id_table); 1550 1551 /* USB subsystem interface */ 1552 static struct usb_driver hackrf_driver = { 1553 .name = KBUILD_MODNAME, 1554 .probe = hackrf_probe, 1555 .disconnect = hackrf_disconnect, 1556 .id_table = hackrf_id_table, 1557 }; 1558 1559 module_usb_driver(hackrf_driver); 1560 1561 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 1562 MODULE_DESCRIPTION("HackRF"); 1563 MODULE_LICENSE("GPL"); 1564