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 */ 32static bool hackrf_enable_rf_gain_ctrl; 33module_param_named(enable_rf_gain_ctrl, hackrf_enable_rf_gain_ctrl, bool, 0644); 34MODULE_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) */ 37enum { 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 58static 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 69static 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 */ 81struct hackrf_format { 82 u32 pixelformat; 83 u32 buffersize; 84}; 85 86/* format descriptions for capture and preview */ 87static struct hackrf_format formats[] = { 88 { 89 .pixelformat = V4L2_SDR_FMT_CS8, 90 .buffersize = BULK_BUFFER_SIZE, 91 }, 92}; 93 94static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); 95 96/* intermediate buffers with raw data from the USB device */ 97struct hackrf_buffer { 98 struct vb2_v4l2_buffer vb; 99 struct list_head list; 100}; 101 102struct 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 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 */ 191static 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; 240err: 241 return ret; 242} 243 244static 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; 440err: 441 dev_dbg(&intf->dev, "failed=%d\n", ret); 442 return ret; 443} 444 445/* Private functions */ 446static 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); 458leave: 459 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 460 return buffer; 461} 462 463static 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 */ 490static 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 v4l2_get_timestamp(&buffer->vb.timestamp); 530 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_DONE); 531exit_usb_submit_urb: 532 usb_submit_urb(urb, GFP_ATOMIC); 533} 534 535static 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 v4l2_get_timestamp(&buffer->vb.timestamp); 575 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_DONE); 576exit_usb_submit_urb: 577 usb_submit_urb(urb, GFP_ATOMIC); 578} 579 580static 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 594static 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 613static 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 629static 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 657static 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 675static 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 dev_dbg(dev->dev, "failed\n"); 695 for (j = 0; j < i; j++) 696 usb_free_urb(dev->urb_list[j]); 697 return -ENOMEM; 698 } 699 usb_fill_bulk_urb(dev->urb_list[i], 700 dev->udev, 701 pipe, 702 dev->buf_list[i], 703 BULK_BUFFER_SIZE, 704 complete, dev); 705 706 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 707 dev->urb_list[i]->transfer_dma = dev->dma_addr[i]; 708 dev->urbs_initialized++; 709 } 710 711 return 0; 712} 713 714/* The user yanked out the cable... */ 715static void hackrf_disconnect(struct usb_interface *intf) 716{ 717 struct v4l2_device *v = usb_get_intfdata(intf); 718 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev); 719 720 dev_dbg(dev->dev, "\n"); 721 722 mutex_lock(&dev->vb_queue_lock); 723 mutex_lock(&dev->v4l2_lock); 724 /* No need to keep the urbs around after disconnection */ 725 dev->udev = NULL; 726 v4l2_device_disconnect(&dev->v4l2_dev); 727 video_unregister_device(&dev->tx_vdev); 728 video_unregister_device(&dev->rx_vdev); 729 mutex_unlock(&dev->v4l2_lock); 730 mutex_unlock(&dev->vb_queue_lock); 731 732 v4l2_device_put(&dev->v4l2_dev); 733} 734 735/* Videobuf2 operations */ 736static void hackrf_return_all_buffers(struct vb2_queue *vq, 737 enum vb2_buffer_state state) 738{ 739 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 740 struct usb_interface *intf = dev->intf; 741 struct hackrf_buffer *buffer, *node; 742 struct list_head *buffer_list; 743 unsigned long flags; 744 745 dev_dbg(&intf->dev, "\n"); 746 747 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 748 buffer_list = &dev->rx_buffer_list; 749 else 750 buffer_list = &dev->tx_buffer_list; 751 752 spin_lock_irqsave(&dev->buffer_list_lock, flags); 753 list_for_each_entry_safe(buffer, node, buffer_list, list) { 754 dev_dbg(&intf->dev, "list_for_each_entry_safe\n"); 755 vb2_buffer_done(&buffer->vb.vb2_buf, state); 756 list_del(&buffer->list); 757 } 758 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 759} 760 761static int hackrf_queue_setup(struct vb2_queue *vq, 762 const void *parg, unsigned int *nbuffers, 763 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) 764{ 765 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 766 767 dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers); 768 769 /* Need at least 8 buffers */ 770 if (vq->num_buffers + *nbuffers < 8) 771 *nbuffers = 8 - vq->num_buffers; 772 *nplanes = 1; 773 sizes[0] = PAGE_ALIGN(dev->buffersize); 774 775 dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]); 776 return 0; 777} 778 779static void hackrf_buf_queue(struct vb2_buffer *vb) 780{ 781 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 782 struct vb2_queue *vq = vb->vb2_queue; 783 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 784 struct hackrf_buffer *buffer = container_of(vbuf, struct hackrf_buffer, vb); 785 struct list_head *buffer_list; 786 unsigned long flags; 787 788 dev_dbg_ratelimited(&dev->intf->dev, "\n"); 789 790 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 791 buffer_list = &dev->rx_buffer_list; 792 else 793 buffer_list = &dev->tx_buffer_list; 794 795 spin_lock_irqsave(&dev->buffer_list_lock, flags); 796 list_add_tail(&buffer->list, buffer_list); 797 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 798} 799 800static int hackrf_start_streaming(struct vb2_queue *vq, unsigned int count) 801{ 802 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 803 struct usb_interface *intf = dev->intf; 804 int ret; 805 unsigned int mode; 806 807 dev_dbg(&intf->dev, "count=%i\n", count); 808 809 mutex_lock(&dev->v4l2_lock); 810 811 /* Allow only RX or TX, not both same time */ 812 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) { 813 if (test_bit(TX_ON, &dev->flags)) { 814 ret = -EBUSY; 815 goto err_hackrf_return_all_buffers; 816 } 817 818 mode = 1; 819 set_bit(RX_ON, &dev->flags); 820 } else { 821 if (test_bit(RX_ON, &dev->flags)) { 822 ret = -EBUSY; 823 goto err_hackrf_return_all_buffers; 824 } 825 826 mode = 2; 827 set_bit(TX_ON, &dev->flags); 828 } 829 830 dev->sequence = 0; 831 832 ret = hackrf_alloc_stream_bufs(dev); 833 if (ret) 834 goto err; 835 836 ret = hackrf_alloc_urbs(dev, (mode == 1)); 837 if (ret) 838 goto err; 839 840 ret = hackrf_submit_urbs(dev); 841 if (ret) 842 goto err; 843 844 ret = hackrf_set_params(dev); 845 if (ret) 846 goto err; 847 848 /* start hardware streaming */ 849 ret = hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, mode, 0, NULL, 0); 850 if (ret) 851 goto err; 852 853 mutex_unlock(&dev->v4l2_lock); 854 855 return 0; 856err: 857 hackrf_kill_urbs(dev); 858 hackrf_free_urbs(dev); 859 hackrf_free_stream_bufs(dev); 860 clear_bit(RX_ON, &dev->flags); 861 clear_bit(TX_ON, &dev->flags); 862err_hackrf_return_all_buffers: 863 hackrf_return_all_buffers(vq, VB2_BUF_STATE_QUEUED); 864 mutex_unlock(&dev->v4l2_lock); 865 dev_dbg(&intf->dev, "failed=%d\n", ret); 866 return ret; 867} 868 869static void hackrf_stop_streaming(struct vb2_queue *vq) 870{ 871 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 872 struct usb_interface *intf = dev->intf; 873 874 dev_dbg(&intf->dev, "\n"); 875 876 mutex_lock(&dev->v4l2_lock); 877 878 /* stop hardware streaming */ 879 hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 0, 0, NULL, 0); 880 881 hackrf_kill_urbs(dev); 882 hackrf_free_urbs(dev); 883 hackrf_free_stream_bufs(dev); 884 885 hackrf_return_all_buffers(vq, VB2_BUF_STATE_ERROR); 886 887 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 888 clear_bit(RX_ON, &dev->flags); 889 else 890 clear_bit(TX_ON, &dev->flags); 891 892 mutex_unlock(&dev->v4l2_lock); 893} 894 895static struct vb2_ops hackrf_vb2_ops = { 896 .queue_setup = hackrf_queue_setup, 897 .buf_queue = hackrf_buf_queue, 898 .start_streaming = hackrf_start_streaming, 899 .stop_streaming = hackrf_stop_streaming, 900 .wait_prepare = vb2_ops_wait_prepare, 901 .wait_finish = vb2_ops_wait_finish, 902}; 903 904static int hackrf_querycap(struct file *file, void *fh, 905 struct v4l2_capability *cap) 906{ 907 struct hackrf_dev *dev = video_drvdata(file); 908 struct usb_interface *intf = dev->intf; 909 struct video_device *vdev = video_devdata(file); 910 911 dev_dbg(&intf->dev, "\n"); 912 913 if (vdev->vfl_dir == VFL_DIR_RX) 914 cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER | 915 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; 916 917 else 918 cap->device_caps = V4L2_CAP_SDR_OUTPUT | V4L2_CAP_MODULATOR | 919 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; 920 921 cap->capabilities = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER | 922 V4L2_CAP_SDR_OUTPUT | V4L2_CAP_MODULATOR | 923 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE | 924 V4L2_CAP_DEVICE_CAPS; 925 strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 926 strlcpy(cap->card, dev->rx_vdev.name, sizeof(cap->card)); 927 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 928 929 return 0; 930} 931 932static int hackrf_s_fmt_sdr(struct file *file, void *priv, 933 struct v4l2_format *f) 934{ 935 struct hackrf_dev *dev = video_drvdata(file); 936 struct video_device *vdev = video_devdata(file); 937 struct vb2_queue *q; 938 int i; 939 940 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 941 (char *)&f->fmt.sdr.pixelformat); 942 943 if (vdev->vfl_dir == VFL_DIR_RX) 944 q = &dev->rx_vb2_queue; 945 else 946 q = &dev->tx_vb2_queue; 947 948 if (vb2_is_busy(q)) 949 return -EBUSY; 950 951 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 952 for (i = 0; i < NUM_FORMATS; i++) { 953 if (f->fmt.sdr.pixelformat == formats[i].pixelformat) { 954 dev->pixelformat = formats[i].pixelformat; 955 dev->buffersize = formats[i].buffersize; 956 f->fmt.sdr.buffersize = formats[i].buffersize; 957 return 0; 958 } 959 } 960 961 dev->pixelformat = formats[0].pixelformat; 962 dev->buffersize = formats[0].buffersize; 963 f->fmt.sdr.pixelformat = formats[0].pixelformat; 964 f->fmt.sdr.buffersize = formats[0].buffersize; 965 966 return 0; 967} 968 969static int hackrf_g_fmt_sdr(struct file *file, void *priv, 970 struct v4l2_format *f) 971{ 972 struct hackrf_dev *dev = video_drvdata(file); 973 974 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 975 (char *)&dev->pixelformat); 976 977 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 978 f->fmt.sdr.pixelformat = dev->pixelformat; 979 f->fmt.sdr.buffersize = dev->buffersize; 980 981 return 0; 982} 983 984static int hackrf_try_fmt_sdr(struct file *file, void *priv, 985 struct v4l2_format *f) 986{ 987 struct hackrf_dev *dev = video_drvdata(file); 988 int i; 989 990 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 991 (char *)&f->fmt.sdr.pixelformat); 992 993 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); 994 for (i = 0; i < NUM_FORMATS; i++) { 995 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 996 f->fmt.sdr.buffersize = formats[i].buffersize; 997 return 0; 998 } 999 } 1000 1001 f->fmt.sdr.pixelformat = formats[0].pixelformat; 1002 f->fmt.sdr.buffersize = formats[0].buffersize; 1003 1004 return 0; 1005} 1006 1007static int hackrf_enum_fmt_sdr(struct file *file, void *priv, 1008 struct v4l2_fmtdesc *f) 1009{ 1010 struct hackrf_dev *dev = video_drvdata(file); 1011 1012 dev_dbg(dev->dev, "index=%d\n", f->index); 1013 1014 if (f->index >= NUM_FORMATS) 1015 return -EINVAL; 1016 1017 f->pixelformat = formats[f->index].pixelformat; 1018 1019 return 0; 1020} 1021 1022static int hackrf_s_tuner(struct file *file, void *priv, 1023 const struct v4l2_tuner *v) 1024{ 1025 struct hackrf_dev *dev = video_drvdata(file); 1026 int ret; 1027 1028 dev_dbg(dev->dev, "index=%d\n", v->index); 1029 1030 if (v->index == 0) 1031 ret = 0; 1032 else if (v->index == 1) 1033 ret = 0; 1034 else 1035 ret = -EINVAL; 1036 1037 return ret; 1038} 1039 1040static int hackrf_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) 1041{ 1042 struct hackrf_dev *dev = video_drvdata(file); 1043 int ret; 1044 1045 dev_dbg(dev->dev, "index=%d\n", v->index); 1046 1047 if (v->index == 0) { 1048 strlcpy(v->name, "HackRF ADC", sizeof(v->name)); 1049 v->type = V4L2_TUNER_SDR; 1050 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1051 v->rangelow = bands_adc_dac[0].rangelow; 1052 v->rangehigh = bands_adc_dac[0].rangehigh; 1053 ret = 0; 1054 } else if (v->index == 1) { 1055 strlcpy(v->name, "HackRF RF", sizeof(v->name)); 1056 v->type = V4L2_TUNER_RF; 1057 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1058 v->rangelow = bands_rx_tx[0].rangelow; 1059 v->rangehigh = bands_rx_tx[0].rangehigh; 1060 ret = 0; 1061 } else { 1062 ret = -EINVAL; 1063 } 1064 1065 return ret; 1066} 1067 1068static int hackrf_s_modulator(struct file *file, void *fh, 1069 const struct v4l2_modulator *a) 1070{ 1071 struct hackrf_dev *dev = video_drvdata(file); 1072 1073 dev_dbg(dev->dev, "index=%d\n", a->index); 1074 1075 return a->index > 1 ? -EINVAL : 0; 1076} 1077 1078static int hackrf_g_modulator(struct file *file, void *fh, 1079 struct v4l2_modulator *a) 1080{ 1081 struct hackrf_dev *dev = video_drvdata(file); 1082 int ret; 1083 1084 dev_dbg(dev->dev, "index=%d\n", a->index); 1085 1086 if (a->index == 0) { 1087 strlcpy(a->name, "HackRF DAC", sizeof(a->name)); 1088 a->type = V4L2_TUNER_SDR; 1089 a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1090 a->rangelow = bands_adc_dac[0].rangelow; 1091 a->rangehigh = bands_adc_dac[0].rangehigh; 1092 ret = 0; 1093 } else if (a->index == 1) { 1094 strlcpy(a->name, "HackRF RF", sizeof(a->name)); 1095 a->type = V4L2_TUNER_RF; 1096 a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1097 a->rangelow = bands_rx_tx[0].rangelow; 1098 a->rangehigh = bands_rx_tx[0].rangehigh; 1099 ret = 0; 1100 } else { 1101 ret = -EINVAL; 1102 } 1103 1104 return ret; 1105} 1106 1107static int hackrf_s_frequency(struct file *file, void *priv, 1108 const struct v4l2_frequency *f) 1109{ 1110 struct hackrf_dev *dev = video_drvdata(file); 1111 struct usb_interface *intf = dev->intf; 1112 struct video_device *vdev = video_devdata(file); 1113 int ret; 1114 unsigned int uitmp; 1115 1116 dev_dbg(&intf->dev, "tuner=%d type=%d frequency=%u\n", 1117 f->tuner, f->type, f->frequency); 1118 1119 if (f->tuner == 0) { 1120 uitmp = clamp(f->frequency, bands_adc_dac[0].rangelow, 1121 bands_adc_dac[0].rangehigh); 1122 if (vdev->vfl_dir == VFL_DIR_RX) { 1123 dev->f_adc = uitmp; 1124 set_bit(RX_ADC_FREQUENCY, &dev->flags); 1125 } else { 1126 dev->f_dac = uitmp; 1127 set_bit(TX_DAC_FREQUENCY, &dev->flags); 1128 } 1129 } else if (f->tuner == 1) { 1130 uitmp = clamp(f->frequency, bands_rx_tx[0].rangelow, 1131 bands_rx_tx[0].rangehigh); 1132 if (vdev->vfl_dir == VFL_DIR_RX) { 1133 dev->f_rx = uitmp; 1134 set_bit(RX_RF_FREQUENCY, &dev->flags); 1135 } else { 1136 dev->f_tx = uitmp; 1137 set_bit(TX_RF_FREQUENCY, &dev->flags); 1138 } 1139 } else { 1140 ret = -EINVAL; 1141 goto err; 1142 } 1143 1144 ret = hackrf_set_params(dev); 1145 if (ret) 1146 goto err; 1147 1148 return 0; 1149err: 1150 dev_dbg(&intf->dev, "failed=%d\n", ret); 1151 return ret; 1152} 1153 1154static int hackrf_g_frequency(struct file *file, void *priv, 1155 struct v4l2_frequency *f) 1156{ 1157 struct hackrf_dev *dev = video_drvdata(file); 1158 struct usb_interface *intf = dev->intf; 1159 struct video_device *vdev = video_devdata(file); 1160 int ret; 1161 1162 dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type); 1163 1164 if (f->tuner == 0) { 1165 f->type = V4L2_TUNER_SDR; 1166 if (vdev->vfl_dir == VFL_DIR_RX) 1167 f->frequency = dev->f_adc; 1168 else 1169 f->frequency = dev->f_dac; 1170 } else if (f->tuner == 1) { 1171 f->type = V4L2_TUNER_RF; 1172 if (vdev->vfl_dir == VFL_DIR_RX) 1173 f->frequency = dev->f_rx; 1174 else 1175 f->frequency = dev->f_tx; 1176 } else { 1177 ret = -EINVAL; 1178 goto err; 1179 } 1180 1181 return 0; 1182err: 1183 dev_dbg(&intf->dev, "failed=%d\n", ret); 1184 return ret; 1185} 1186 1187static int hackrf_enum_freq_bands(struct file *file, void *priv, 1188 struct v4l2_frequency_band *band) 1189{ 1190 struct hackrf_dev *dev = video_drvdata(file); 1191 int ret; 1192 1193 dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n", 1194 band->tuner, band->type, band->index); 1195 1196 if (band->tuner == 0) { 1197 if (band->index >= ARRAY_SIZE(bands_adc_dac)) { 1198 ret = -EINVAL; 1199 } else { 1200 *band = bands_adc_dac[band->index]; 1201 ret = 0; 1202 } 1203 } else if (band->tuner == 1) { 1204 if (band->index >= ARRAY_SIZE(bands_rx_tx)) { 1205 ret = -EINVAL; 1206 } else { 1207 *band = bands_rx_tx[band->index]; 1208 ret = 0; 1209 } 1210 } else { 1211 ret = -EINVAL; 1212 } 1213 1214 return ret; 1215} 1216 1217static const struct v4l2_ioctl_ops hackrf_ioctl_ops = { 1218 .vidioc_querycap = hackrf_querycap, 1219 1220 .vidioc_s_fmt_sdr_cap = hackrf_s_fmt_sdr, 1221 .vidioc_g_fmt_sdr_cap = hackrf_g_fmt_sdr, 1222 .vidioc_enum_fmt_sdr_cap = hackrf_enum_fmt_sdr, 1223 .vidioc_try_fmt_sdr_cap = hackrf_try_fmt_sdr, 1224 1225 .vidioc_s_fmt_sdr_out = hackrf_s_fmt_sdr, 1226 .vidioc_g_fmt_sdr_out = hackrf_g_fmt_sdr, 1227 .vidioc_enum_fmt_sdr_out = hackrf_enum_fmt_sdr, 1228 .vidioc_try_fmt_sdr_out = hackrf_try_fmt_sdr, 1229 1230 .vidioc_reqbufs = vb2_ioctl_reqbufs, 1231 .vidioc_create_bufs = vb2_ioctl_create_bufs, 1232 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 1233 .vidioc_querybuf = vb2_ioctl_querybuf, 1234 .vidioc_qbuf = vb2_ioctl_qbuf, 1235 .vidioc_dqbuf = vb2_ioctl_dqbuf, 1236 .vidioc_expbuf = vb2_ioctl_expbuf, 1237 1238 .vidioc_streamon = vb2_ioctl_streamon, 1239 .vidioc_streamoff = vb2_ioctl_streamoff, 1240 1241 .vidioc_s_tuner = hackrf_s_tuner, 1242 .vidioc_g_tuner = hackrf_g_tuner, 1243 1244 .vidioc_s_modulator = hackrf_s_modulator, 1245 .vidioc_g_modulator = hackrf_g_modulator, 1246 1247 .vidioc_s_frequency = hackrf_s_frequency, 1248 .vidioc_g_frequency = hackrf_g_frequency, 1249 .vidioc_enum_freq_bands = hackrf_enum_freq_bands, 1250 1251 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1252 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1253 .vidioc_log_status = v4l2_ctrl_log_status, 1254}; 1255 1256static const struct v4l2_file_operations hackrf_fops = { 1257 .owner = THIS_MODULE, 1258 .open = v4l2_fh_open, 1259 .release = vb2_fop_release, 1260 .read = vb2_fop_read, 1261 .write = vb2_fop_write, 1262 .poll = vb2_fop_poll, 1263 .mmap = vb2_fop_mmap, 1264 .unlocked_ioctl = video_ioctl2, 1265}; 1266 1267static struct video_device hackrf_template = { 1268 .name = "HackRF One", 1269 .release = video_device_release_empty, 1270 .fops = &hackrf_fops, 1271 .ioctl_ops = &hackrf_ioctl_ops, 1272}; 1273 1274static void hackrf_video_release(struct v4l2_device *v) 1275{ 1276 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev); 1277 1278 dev_dbg(dev->dev, "\n"); 1279 1280 v4l2_ctrl_handler_free(&dev->rx_ctrl_handler); 1281 v4l2_ctrl_handler_free(&dev->tx_ctrl_handler); 1282 v4l2_device_unregister(&dev->v4l2_dev); 1283 kfree(dev); 1284} 1285 1286static int hackrf_s_ctrl_rx(struct v4l2_ctrl *ctrl) 1287{ 1288 struct hackrf_dev *dev = container_of(ctrl->handler, 1289 struct hackrf_dev, rx_ctrl_handler); 1290 struct usb_interface *intf = dev->intf; 1291 int ret; 1292 1293 switch (ctrl->id) { 1294 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1295 case V4L2_CID_RF_TUNER_BANDWIDTH: 1296 set_bit(RX_BANDWIDTH, &dev->flags); 1297 break; 1298 case V4L2_CID_RF_TUNER_RF_GAIN: 1299 set_bit(RX_RF_GAIN, &dev->flags); 1300 break; 1301 case V4L2_CID_RF_TUNER_LNA_GAIN: 1302 set_bit(RX_LNA_GAIN, &dev->flags); 1303 break; 1304 case V4L2_CID_RF_TUNER_IF_GAIN: 1305 set_bit(RX_IF_GAIN, &dev->flags); 1306 break; 1307 default: 1308 dev_dbg(&intf->dev, "unknown ctrl: id=%d name=%s\n", 1309 ctrl->id, ctrl->name); 1310 ret = -EINVAL; 1311 goto err; 1312 } 1313 1314 ret = hackrf_set_params(dev); 1315 if (ret) 1316 goto err; 1317 1318 return 0; 1319err: 1320 dev_dbg(&intf->dev, "failed=%d\n", ret); 1321 return ret; 1322} 1323 1324static int hackrf_s_ctrl_tx(struct v4l2_ctrl *ctrl) 1325{ 1326 struct hackrf_dev *dev = container_of(ctrl->handler, 1327 struct hackrf_dev, tx_ctrl_handler); 1328 struct usb_interface *intf = dev->intf; 1329 int ret; 1330 1331 switch (ctrl->id) { 1332 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1333 case V4L2_CID_RF_TUNER_BANDWIDTH: 1334 set_bit(TX_BANDWIDTH, &dev->flags); 1335 break; 1336 case V4L2_CID_RF_TUNER_LNA_GAIN: 1337 set_bit(TX_LNA_GAIN, &dev->flags); 1338 break; 1339 case V4L2_CID_RF_TUNER_RF_GAIN: 1340 set_bit(TX_RF_GAIN, &dev->flags); 1341 break; 1342 default: 1343 dev_dbg(&intf->dev, "unknown ctrl: id=%d name=%s\n", 1344 ctrl->id, ctrl->name); 1345 ret = -EINVAL; 1346 goto err; 1347 } 1348 1349 ret = hackrf_set_params(dev); 1350 if (ret) 1351 goto err; 1352 1353 return 0; 1354err: 1355 dev_dbg(&intf->dev, "failed=%d\n", ret); 1356 return ret; 1357} 1358 1359static const struct v4l2_ctrl_ops hackrf_ctrl_ops_rx = { 1360 .s_ctrl = hackrf_s_ctrl_rx, 1361}; 1362 1363static const struct v4l2_ctrl_ops hackrf_ctrl_ops_tx = { 1364 .s_ctrl = hackrf_s_ctrl_tx, 1365}; 1366 1367static int hackrf_probe(struct usb_interface *intf, 1368 const struct usb_device_id *id) 1369{ 1370 struct hackrf_dev *dev; 1371 int ret; 1372 u8 u8tmp, buf[BUF_SIZE]; 1373 1374 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1375 if (!dev) { 1376 ret = -ENOMEM; 1377 goto err; 1378 } 1379 1380 mutex_init(&dev->v4l2_lock); 1381 mutex_init(&dev->vb_queue_lock); 1382 spin_lock_init(&dev->buffer_list_lock); 1383 INIT_LIST_HEAD(&dev->rx_buffer_list); 1384 INIT_LIST_HEAD(&dev->tx_buffer_list); 1385 dev->intf = intf; 1386 dev->dev = &intf->dev; 1387 dev->udev = interface_to_usbdev(intf); 1388 dev->pixelformat = formats[0].pixelformat; 1389 dev->buffersize = formats[0].buffersize; 1390 dev->f_adc = bands_adc_dac[0].rangelow; 1391 dev->f_dac = bands_adc_dac[0].rangelow; 1392 dev->f_rx = bands_rx_tx[0].rangelow; 1393 dev->f_tx = bands_rx_tx[0].rangelow; 1394 set_bit(RX_ADC_FREQUENCY, &dev->flags); 1395 set_bit(TX_DAC_FREQUENCY, &dev->flags); 1396 set_bit(RX_RF_FREQUENCY, &dev->flags); 1397 set_bit(TX_RF_FREQUENCY, &dev->flags); 1398 1399 /* Detect device */ 1400 ret = hackrf_ctrl_msg(dev, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1); 1401 if (ret == 0) 1402 ret = hackrf_ctrl_msg(dev, CMD_VERSION_STRING_READ, 0, 0, 1403 buf, BUF_SIZE); 1404 if (ret) { 1405 dev_err(dev->dev, "Could not detect board\n"); 1406 goto err_kfree; 1407 } 1408 1409 buf[BUF_SIZE - 1] = '\0'; 1410 dev_info(dev->dev, "Board ID: %02x\n", u8tmp); 1411 dev_info(dev->dev, "Firmware version: %s\n", buf); 1412 1413 /* Init vb2 queue structure for receiver */ 1414 dev->rx_vb2_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE; 1415 dev->rx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | 1416 VB2_READ; 1417 dev->rx_vb2_queue.ops = &hackrf_vb2_ops; 1418 dev->rx_vb2_queue.mem_ops = &vb2_vmalloc_memops; 1419 dev->rx_vb2_queue.drv_priv = dev; 1420 dev->rx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer); 1421 dev->rx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1422 ret = vb2_queue_init(&dev->rx_vb2_queue); 1423 if (ret) { 1424 dev_err(dev->dev, "Could not initialize rx vb2 queue\n"); 1425 goto err_kfree; 1426 } 1427 1428 /* Init vb2 queue structure for transmitter */ 1429 dev->tx_vb2_queue.type = V4L2_BUF_TYPE_SDR_OUTPUT; 1430 dev->tx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | 1431 VB2_WRITE; 1432 dev->tx_vb2_queue.ops = &hackrf_vb2_ops; 1433 dev->tx_vb2_queue.mem_ops = &vb2_vmalloc_memops; 1434 dev->tx_vb2_queue.drv_priv = dev; 1435 dev->tx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer); 1436 dev->tx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1437 ret = vb2_queue_init(&dev->tx_vb2_queue); 1438 if (ret) { 1439 dev_err(dev->dev, "Could not initialize tx vb2 queue\n"); 1440 goto err_kfree; 1441 } 1442 1443 /* Register controls for receiver */ 1444 v4l2_ctrl_handler_init(&dev->rx_ctrl_handler, 5); 1445 dev->rx_bandwidth_auto = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1446 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 1447 0, 1, 0, 1); 1448 dev->rx_bandwidth = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1449 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH, 1450 1750000, 28000000, 50000, 1750000); 1451 v4l2_ctrl_auto_cluster(2, &dev->rx_bandwidth_auto, 0, false); 1452 dev->rx_rf_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1453 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 12, 12, 0); 1454 dev->rx_lna_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1455 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0); 1456 dev->rx_if_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1457 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0); 1458 if (dev->rx_ctrl_handler.error) { 1459 ret = dev->rx_ctrl_handler.error; 1460 dev_err(dev->dev, "Could not initialize controls\n"); 1461 goto err_v4l2_ctrl_handler_free_rx; 1462 } 1463 v4l2_ctrl_grab(dev->rx_rf_gain, !hackrf_enable_rf_gain_ctrl); 1464 v4l2_ctrl_handler_setup(&dev->rx_ctrl_handler); 1465 1466 /* Register controls for transmitter */ 1467 v4l2_ctrl_handler_init(&dev->tx_ctrl_handler, 4); 1468 dev->tx_bandwidth_auto = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1469 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 1470 0, 1, 0, 1); 1471 dev->tx_bandwidth = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1472 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH, 1473 1750000, 28000000, 50000, 1750000); 1474 v4l2_ctrl_auto_cluster(2, &dev->tx_bandwidth_auto, 0, false); 1475 dev->tx_lna_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1476 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 47, 1, 0); 1477 dev->tx_rf_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1478 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 15, 15, 0); 1479 if (dev->tx_ctrl_handler.error) { 1480 ret = dev->tx_ctrl_handler.error; 1481 dev_err(dev->dev, "Could not initialize controls\n"); 1482 goto err_v4l2_ctrl_handler_free_tx; 1483 } 1484 v4l2_ctrl_grab(dev->tx_rf_gain, !hackrf_enable_rf_gain_ctrl); 1485 v4l2_ctrl_handler_setup(&dev->tx_ctrl_handler); 1486 1487 /* Register the v4l2_device structure */ 1488 dev->v4l2_dev.release = hackrf_video_release; 1489 ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev); 1490 if (ret) { 1491 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret); 1492 goto err_v4l2_ctrl_handler_free_tx; 1493 } 1494 1495 /* Init video_device structure for receiver */ 1496 dev->rx_vdev = hackrf_template; 1497 dev->rx_vdev.queue = &dev->rx_vb2_queue; 1498 dev->rx_vdev.queue->lock = &dev->vb_queue_lock; 1499 dev->rx_vdev.v4l2_dev = &dev->v4l2_dev; 1500 dev->rx_vdev.ctrl_handler = &dev->rx_ctrl_handler; 1501 dev->rx_vdev.lock = &dev->v4l2_lock; 1502 dev->rx_vdev.vfl_dir = VFL_DIR_RX; 1503 video_set_drvdata(&dev->rx_vdev, dev); 1504 ret = video_register_device(&dev->rx_vdev, VFL_TYPE_SDR, -1); 1505 if (ret) { 1506 dev_err(dev->dev, 1507 "Failed to register as video device (%d)\n", ret); 1508 goto err_v4l2_device_unregister; 1509 } 1510 dev_info(dev->dev, "Registered as %s\n", 1511 video_device_node_name(&dev->rx_vdev)); 1512 1513 /* Init video_device structure for transmitter */ 1514 dev->tx_vdev = hackrf_template; 1515 dev->tx_vdev.queue = &dev->tx_vb2_queue; 1516 dev->tx_vdev.queue->lock = &dev->vb_queue_lock; 1517 dev->tx_vdev.v4l2_dev = &dev->v4l2_dev; 1518 dev->tx_vdev.ctrl_handler = &dev->tx_ctrl_handler; 1519 dev->tx_vdev.lock = &dev->v4l2_lock; 1520 dev->tx_vdev.vfl_dir = VFL_DIR_TX; 1521 video_set_drvdata(&dev->tx_vdev, dev); 1522 ret = video_register_device(&dev->tx_vdev, VFL_TYPE_SDR, -1); 1523 if (ret) { 1524 dev_err(dev->dev, 1525 "Failed to register as video device (%d)\n", ret); 1526 goto err_video_unregister_device_rx; 1527 } 1528 dev_info(dev->dev, "Registered as %s\n", 1529 video_device_node_name(&dev->tx_vdev)); 1530 1531 dev_notice(dev->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); 1532 return 0; 1533err_video_unregister_device_rx: 1534 video_unregister_device(&dev->rx_vdev); 1535err_v4l2_device_unregister: 1536 v4l2_device_unregister(&dev->v4l2_dev); 1537err_v4l2_ctrl_handler_free_tx: 1538 v4l2_ctrl_handler_free(&dev->tx_ctrl_handler); 1539err_v4l2_ctrl_handler_free_rx: 1540 v4l2_ctrl_handler_free(&dev->rx_ctrl_handler); 1541err_kfree: 1542 kfree(dev); 1543err: 1544 dev_dbg(&intf->dev, "failed=%d\n", ret); 1545 return ret; 1546} 1547 1548/* USB device ID list */ 1549static struct usb_device_id hackrf_id_table[] = { 1550 { USB_DEVICE(0x1d50, 0x6089) }, /* HackRF One */ 1551 { } 1552}; 1553MODULE_DEVICE_TABLE(usb, hackrf_id_table); 1554 1555/* USB subsystem interface */ 1556static struct usb_driver hackrf_driver = { 1557 .name = KBUILD_MODNAME, 1558 .probe = hackrf_probe, 1559 .disconnect = hackrf_disconnect, 1560 .id_table = hackrf_id_table, 1561}; 1562 1563module_usb_driver(hackrf_driver); 1564 1565MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 1566MODULE_DESCRIPTION("HackRF"); 1567MODULE_LICENSE("GPL"); 1568