1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * HackRF driver 4 * 5 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> 6 */ 7 8#include <linux/module.h> 9#include <linux/slab.h> 10#include <linux/usb.h> 11#include <media/v4l2-device.h> 12#include <media/v4l2-ioctl.h> 13#include <media/v4l2-ctrls.h> 14#include <media/v4l2-event.h> 15#include <media/videobuf2-v4l2.h> 16#include <media/videobuf2-vmalloc.h> 17 18/* 19 * Used Avago MGA-81563 RF amplifier could be destroyed pretty easily with too 20 * strong signal or transmitting to bad antenna. 21 * Set RF gain control to 'grabbed' state by default for sure. 22 */ 23static bool hackrf_enable_rf_gain_ctrl; 24module_param_named(enable_rf_gain_ctrl, hackrf_enable_rf_gain_ctrl, bool, 0644); 25MODULE_PARM_DESC(enable_rf_gain_ctrl, "enable RX/TX RF amplifier control (warn: could damage amplifier)"); 26 27/* HackRF USB API commands (from HackRF Library) */ 28enum { 29 CMD_SET_TRANSCEIVER_MODE = 0x01, 30 CMD_SAMPLE_RATE_SET = 0x06, 31 CMD_BASEBAND_FILTER_BANDWIDTH_SET = 0x07, 32 CMD_BOARD_ID_READ = 0x0e, 33 CMD_VERSION_STRING_READ = 0x0f, 34 CMD_SET_FREQ = 0x10, 35 CMD_AMP_ENABLE = 0x11, 36 CMD_SET_LNA_GAIN = 0x13, 37 CMD_SET_VGA_GAIN = 0x14, 38 CMD_SET_TXVGA_GAIN = 0x15, 39}; 40 41/* 42 * bEndpointAddress 0x81 EP 1 IN 43 * Transfer Type Bulk 44 * wMaxPacketSize 0x0200 1x 512 bytes 45 */ 46#define MAX_BULK_BUFS (6) 47#define BULK_BUFFER_SIZE (128 * 512) 48 49static const struct v4l2_frequency_band bands_adc_dac[] = { 50 { 51 .tuner = 0, 52 .type = V4L2_TUNER_SDR, 53 .index = 0, 54 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 55 .rangelow = 200000, 56 .rangehigh = 24000000, 57 }, 58}; 59 60static const struct v4l2_frequency_band bands_rx_tx[] = { 61 { 62 .tuner = 1, 63 .type = V4L2_TUNER_RF, 64 .index = 0, 65 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 66 .rangelow = 1, 67 .rangehigh = 4294967294LL, /* max u32, hw goes over 7GHz */ 68 }, 69}; 70 71/* stream formats */ 72struct hackrf_format { 73 u32 pixelformat; 74 u32 buffersize; 75}; 76 77/* format descriptions for capture and preview */ 78static struct hackrf_format formats[] = { 79 { 80 .pixelformat = V4L2_SDR_FMT_CS8, 81 .buffersize = BULK_BUFFER_SIZE, 82 }, 83}; 84 85static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); 86 87/* intermediate buffers with raw data from the USB device */ 88struct hackrf_buffer { 89 struct vb2_v4l2_buffer vb; 90 struct list_head list; 91}; 92 93struct hackrf_dev { 94#define USB_STATE_URB_BUF 1 /* XXX: set manually */ 95#define RX_ON 4 96#define TX_ON 5 97#define RX_ADC_FREQUENCY 11 98#define TX_DAC_FREQUENCY 12 99#define RX_BANDWIDTH 13 100#define TX_BANDWIDTH 14 101#define RX_RF_FREQUENCY 15 102#define TX_RF_FREQUENCY 16 103#define RX_RF_GAIN 17 104#define TX_RF_GAIN 18 105#define RX_IF_GAIN 19 106#define RX_LNA_GAIN 20 107#define TX_LNA_GAIN 21 108 unsigned long flags; 109 110 struct usb_interface *intf; 111 struct device *dev; 112 struct usb_device *udev; 113 struct video_device rx_vdev; 114 struct video_device tx_vdev; 115 struct v4l2_device v4l2_dev; 116 117 /* videobuf2 queue and queued buffers list */ 118 struct vb2_queue rx_vb2_queue; 119 struct vb2_queue tx_vb2_queue; 120 struct list_head rx_buffer_list; 121 struct list_head tx_buffer_list; 122 spinlock_t buffer_list_lock; /* Protects buffer_list */ 123 unsigned int sequence; /* Buffer sequence counter */ 124 unsigned int vb_full; /* vb is full and packets dropped */ 125 unsigned int vb_empty; /* vb is empty and packets dropped */ 126 127 /* Note if taking both locks v4l2_lock must always be locked first! */ 128 struct mutex v4l2_lock; /* Protects everything else */ 129 struct mutex vb_queue_lock; /* Protects vb_queue */ 130 131 struct urb *urb_list[MAX_BULK_BUFS]; 132 int buf_num; 133 unsigned long buf_size; 134 u8 *buf_list[MAX_BULK_BUFS]; 135 dma_addr_t dma_addr[MAX_BULK_BUFS]; 136 int urbs_initialized; 137 int urbs_submitted; 138 139 /* USB control message buffer */ 140 #define BUF_SIZE 24 141 u8 buf[BUF_SIZE]; 142 143 /* Current configuration */ 144 unsigned int f_adc; 145 unsigned int f_dac; 146 unsigned int f_rx; 147 unsigned int f_tx; 148 u32 pixelformat; 149 u32 buffersize; 150 151 /* Controls */ 152 struct v4l2_ctrl_handler rx_ctrl_handler; 153 struct v4l2_ctrl *rx_bandwidth_auto; 154 struct v4l2_ctrl *rx_bandwidth; 155 struct v4l2_ctrl *rx_rf_gain; 156 struct v4l2_ctrl *rx_lna_gain; 157 struct v4l2_ctrl *rx_if_gain; 158 struct v4l2_ctrl_handler tx_ctrl_handler; 159 struct v4l2_ctrl *tx_bandwidth_auto; 160 struct v4l2_ctrl *tx_bandwidth; 161 struct v4l2_ctrl *tx_rf_gain; 162 struct v4l2_ctrl *tx_lna_gain; 163 164 /* Sample rate calc */ 165 unsigned long jiffies_next; 166 unsigned int sample; 167 unsigned int sample_measured; 168}; 169 170#define hackrf_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \ 171 char *_direction; \ 172 if (_t & USB_DIR_IN) \ 173 _direction = "<<<"; \ 174 else \ 175 _direction = ">>>"; \ 176 dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \ 177 _t, _r, _v & 0xff, _v >> 8, _i & 0xff, \ 178 _i >> 8, _l & 0xff, _l >> 8, _direction, _l, _b); \ 179} 180 181/* execute firmware command */ 182static int hackrf_ctrl_msg(struct hackrf_dev *dev, u8 request, u16 value, 183 u16 index, u8 *data, u16 size) 184{ 185 int ret; 186 unsigned int pipe; 187 u8 requesttype; 188 189 switch (request) { 190 case CMD_SET_TRANSCEIVER_MODE: 191 case CMD_SET_FREQ: 192 case CMD_AMP_ENABLE: 193 case CMD_SAMPLE_RATE_SET: 194 case CMD_BASEBAND_FILTER_BANDWIDTH_SET: 195 pipe = usb_sndctrlpipe(dev->udev, 0); 196 requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT); 197 break; 198 case CMD_BOARD_ID_READ: 199 case CMD_VERSION_STRING_READ: 200 case CMD_SET_LNA_GAIN: 201 case CMD_SET_VGA_GAIN: 202 case CMD_SET_TXVGA_GAIN: 203 pipe = usb_rcvctrlpipe(dev->udev, 0); 204 requesttype = (USB_TYPE_VENDOR | USB_DIR_IN); 205 break; 206 default: 207 dev_err(dev->dev, "Unknown command %02x\n", request); 208 ret = -EINVAL; 209 goto err; 210 } 211 212 /* write request */ 213 if (!(requesttype & USB_DIR_IN)) 214 memcpy(dev->buf, data, size); 215 216 ret = usb_control_msg(dev->udev, pipe, request, requesttype, value, 217 index, dev->buf, size, 1000); 218 hackrf_dbg_usb_control_msg(dev->dev, request, requesttype, value, 219 index, dev->buf, size); 220 if (ret < 0) { 221 dev_err(dev->dev, "usb_control_msg() failed %d request %02x\n", 222 ret, request); 223 goto err; 224 } 225 226 /* read request */ 227 if (requesttype & USB_DIR_IN) 228 memcpy(data, dev->buf, size); 229 230 return 0; 231err: 232 return ret; 233} 234 235static int hackrf_set_params(struct hackrf_dev *dev) 236{ 237 struct usb_interface *intf = dev->intf; 238 int ret, i; 239 u8 buf[8], u8tmp; 240 unsigned int uitmp, uitmp1, uitmp2; 241 const bool rx = test_bit(RX_ON, &dev->flags); 242 const bool tx = test_bit(TX_ON, &dev->flags); 243 static const struct { 244 u32 freq; 245 } bandwidth_lut[] = { 246 { 1750000}, /* 1.75 MHz */ 247 { 2500000}, /* 2.5 MHz */ 248 { 3500000}, /* 3.5 MHz */ 249 { 5000000}, /* 5 MHz */ 250 { 5500000}, /* 5.5 MHz */ 251 { 6000000}, /* 6 MHz */ 252 { 7000000}, /* 7 MHz */ 253 { 8000000}, /* 8 MHz */ 254 { 9000000}, /* 9 MHz */ 255 {10000000}, /* 10 MHz */ 256 {12000000}, /* 12 MHz */ 257 {14000000}, /* 14 MHz */ 258 {15000000}, /* 15 MHz */ 259 {20000000}, /* 20 MHz */ 260 {24000000}, /* 24 MHz */ 261 {28000000}, /* 28 MHz */ 262 }; 263 264 if (!rx && !tx) { 265 dev_dbg(&intf->dev, "device is sleeping\n"); 266 return 0; 267 } 268 269 /* ADC / DAC frequency */ 270 if (rx && test_and_clear_bit(RX_ADC_FREQUENCY, &dev->flags)) { 271 dev_dbg(&intf->dev, "RX ADC frequency=%u Hz\n", dev->f_adc); 272 uitmp1 = dev->f_adc; 273 uitmp2 = 1; 274 set_bit(TX_DAC_FREQUENCY, &dev->flags); 275 } else if (tx && test_and_clear_bit(TX_DAC_FREQUENCY, &dev->flags)) { 276 dev_dbg(&intf->dev, "TX DAC frequency=%u Hz\n", dev->f_dac); 277 uitmp1 = dev->f_dac; 278 uitmp2 = 1; 279 set_bit(RX_ADC_FREQUENCY, &dev->flags); 280 } else { 281 uitmp1 = uitmp2 = 0; 282 } 283 if (uitmp1 || uitmp2) { 284 buf[0] = (uitmp1 >> 0) & 0xff; 285 buf[1] = (uitmp1 >> 8) & 0xff; 286 buf[2] = (uitmp1 >> 16) & 0xff; 287 buf[3] = (uitmp1 >> 24) & 0xff; 288 buf[4] = (uitmp2 >> 0) & 0xff; 289 buf[5] = (uitmp2 >> 8) & 0xff; 290 buf[6] = (uitmp2 >> 16) & 0xff; 291 buf[7] = (uitmp2 >> 24) & 0xff; 292 ret = hackrf_ctrl_msg(dev, CMD_SAMPLE_RATE_SET, 0, 0, buf, 8); 293 if (ret) 294 goto err; 295 } 296 297 /* bandwidth */ 298 if (rx && test_and_clear_bit(RX_BANDWIDTH, &dev->flags)) { 299 if (dev->rx_bandwidth_auto->val == true) 300 uitmp = dev->f_adc; 301 else 302 uitmp = dev->rx_bandwidth->val; 303 304 for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) { 305 if (uitmp <= bandwidth_lut[i].freq) { 306 uitmp = bandwidth_lut[i].freq; 307 break; 308 } 309 } 310 dev->rx_bandwidth->val = uitmp; 311 dev->rx_bandwidth->cur.val = uitmp; 312 dev_dbg(&intf->dev, "RX bandwidth selected=%u\n", uitmp); 313 set_bit(TX_BANDWIDTH, &dev->flags); 314 } else if (tx && test_and_clear_bit(TX_BANDWIDTH, &dev->flags)) { 315 if (dev->tx_bandwidth_auto->val == true) 316 uitmp = dev->f_dac; 317 else 318 uitmp = dev->tx_bandwidth->val; 319 320 for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) { 321 if (uitmp <= bandwidth_lut[i].freq) { 322 uitmp = bandwidth_lut[i].freq; 323 break; 324 } 325 } 326 dev->tx_bandwidth->val = uitmp; 327 dev->tx_bandwidth->cur.val = uitmp; 328 dev_dbg(&intf->dev, "TX bandwidth selected=%u\n", uitmp); 329 set_bit(RX_BANDWIDTH, &dev->flags); 330 } else { 331 uitmp = 0; 332 } 333 if (uitmp) { 334 uitmp1 = uitmp2 = 0; 335 uitmp1 |= ((uitmp >> 0) & 0xff) << 0; 336 uitmp1 |= ((uitmp >> 8) & 0xff) << 8; 337 uitmp2 |= ((uitmp >> 16) & 0xff) << 0; 338 uitmp2 |= ((uitmp >> 24) & 0xff) << 8; 339 ret = hackrf_ctrl_msg(dev, CMD_BASEBAND_FILTER_BANDWIDTH_SET, 340 uitmp1, uitmp2, NULL, 0); 341 if (ret) 342 goto err; 343 } 344 345 /* RX / TX RF frequency */ 346 if (rx && test_and_clear_bit(RX_RF_FREQUENCY, &dev->flags)) { 347 dev_dbg(&intf->dev, "RX RF frequency=%u Hz\n", dev->f_rx); 348 uitmp1 = dev->f_rx / 1000000; 349 uitmp2 = dev->f_rx % 1000000; 350 set_bit(TX_RF_FREQUENCY, &dev->flags); 351 } else if (tx && test_and_clear_bit(TX_RF_FREQUENCY, &dev->flags)) { 352 dev_dbg(&intf->dev, "TX RF frequency=%u Hz\n", dev->f_tx); 353 uitmp1 = dev->f_tx / 1000000; 354 uitmp2 = dev->f_tx % 1000000; 355 set_bit(RX_RF_FREQUENCY, &dev->flags); 356 } else { 357 uitmp1 = uitmp2 = 0; 358 } 359 if (uitmp1 || uitmp2) { 360 buf[0] = (uitmp1 >> 0) & 0xff; 361 buf[1] = (uitmp1 >> 8) & 0xff; 362 buf[2] = (uitmp1 >> 16) & 0xff; 363 buf[3] = (uitmp1 >> 24) & 0xff; 364 buf[4] = (uitmp2 >> 0) & 0xff; 365 buf[5] = (uitmp2 >> 8) & 0xff; 366 buf[6] = (uitmp2 >> 16) & 0xff; 367 buf[7] = (uitmp2 >> 24) & 0xff; 368 ret = hackrf_ctrl_msg(dev, CMD_SET_FREQ, 0, 0, buf, 8); 369 if (ret) 370 goto err; 371 } 372 373 /* RX RF gain */ 374 if (rx && test_and_clear_bit(RX_RF_GAIN, &dev->flags)) { 375 dev_dbg(&intf->dev, "RX RF gain val=%d->%d\n", 376 dev->rx_rf_gain->cur.val, dev->rx_rf_gain->val); 377 378 u8tmp = (dev->rx_rf_gain->val) ? 1 : 0; 379 ret = hackrf_ctrl_msg(dev, CMD_AMP_ENABLE, u8tmp, 0, NULL, 0); 380 if (ret) 381 goto err; 382 set_bit(TX_RF_GAIN, &dev->flags); 383 } 384 385 /* TX RF gain */ 386 if (tx && test_and_clear_bit(TX_RF_GAIN, &dev->flags)) { 387 dev_dbg(&intf->dev, "TX RF gain val=%d->%d\n", 388 dev->tx_rf_gain->cur.val, dev->tx_rf_gain->val); 389 390 u8tmp = (dev->tx_rf_gain->val) ? 1 : 0; 391 ret = hackrf_ctrl_msg(dev, CMD_AMP_ENABLE, u8tmp, 0, NULL, 0); 392 if (ret) 393 goto err; 394 set_bit(RX_RF_GAIN, &dev->flags); 395 } 396 397 /* RX LNA gain */ 398 if (rx && test_and_clear_bit(RX_LNA_GAIN, &dev->flags)) { 399 dev_dbg(dev->dev, "RX LNA gain val=%d->%d\n", 400 dev->rx_lna_gain->cur.val, dev->rx_lna_gain->val); 401 402 ret = hackrf_ctrl_msg(dev, CMD_SET_LNA_GAIN, 0, 403 dev->rx_lna_gain->val, &u8tmp, 1); 404 if (ret) 405 goto err; 406 } 407 408 /* RX IF gain */ 409 if (rx && test_and_clear_bit(RX_IF_GAIN, &dev->flags)) { 410 dev_dbg(&intf->dev, "IF gain val=%d->%d\n", 411 dev->rx_if_gain->cur.val, dev->rx_if_gain->val); 412 413 ret = hackrf_ctrl_msg(dev, CMD_SET_VGA_GAIN, 0, 414 dev->rx_if_gain->val, &u8tmp, 1); 415 if (ret) 416 goto err; 417 } 418 419 /* TX LNA gain */ 420 if (tx && test_and_clear_bit(TX_LNA_GAIN, &dev->flags)) { 421 dev_dbg(&intf->dev, "TX LNA gain val=%d->%d\n", 422 dev->tx_lna_gain->cur.val, dev->tx_lna_gain->val); 423 424 ret = hackrf_ctrl_msg(dev, CMD_SET_TXVGA_GAIN, 0, 425 dev->tx_lna_gain->val, &u8tmp, 1); 426 if (ret) 427 goto err; 428 } 429 430 return 0; 431err: 432 dev_dbg(&intf->dev, "failed=%d\n", ret); 433 return ret; 434} 435 436/* Private functions */ 437static struct hackrf_buffer *hackrf_get_next_buffer(struct hackrf_dev *dev, 438 struct list_head *buffer_list) 439{ 440 unsigned long flags; 441 struct hackrf_buffer *buffer = NULL; 442 443 spin_lock_irqsave(&dev->buffer_list_lock, flags); 444 if (list_empty(buffer_list)) 445 goto leave; 446 447 buffer = list_entry(buffer_list->next, struct hackrf_buffer, list); 448 list_del(&buffer->list); 449leave: 450 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 451 return buffer; 452} 453 454static void hackrf_copy_stream(struct hackrf_dev *dev, void *dst, void *src, 455 unsigned int src_len) 456{ 457 memcpy(dst, src, src_len); 458 459 /* calculate sample rate and output it in 10 seconds intervals */ 460 if (unlikely(time_is_before_jiffies(dev->jiffies_next))) { 461 #define MSECS 10000UL 462 unsigned int msecs = jiffies_to_msecs(jiffies - 463 dev->jiffies_next + msecs_to_jiffies(MSECS)); 464 unsigned int samples = dev->sample - dev->sample_measured; 465 466 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS); 467 dev->sample_measured = dev->sample; 468 dev_dbg(dev->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n", 469 src_len, samples, msecs, 470 samples * 1000UL / msecs); 471 } 472 473 /* total number of samples */ 474 dev->sample += src_len / 2; 475} 476 477/* 478 * This gets called for the bulk stream pipe. This is done in interrupt 479 * time, so it has to be fast, not crash, and not stall. Neat. 480 */ 481static void hackrf_urb_complete_in(struct urb *urb) 482{ 483 struct hackrf_dev *dev = urb->context; 484 struct usb_interface *intf = dev->intf; 485 struct hackrf_buffer *buffer; 486 unsigned int len; 487 488 dev_dbg_ratelimited(&intf->dev, "status=%d length=%u/%u\n", urb->status, 489 urb->actual_length, urb->transfer_buffer_length); 490 491 switch (urb->status) { 492 case 0: /* success */ 493 case -ETIMEDOUT: /* NAK */ 494 break; 495 case -ECONNRESET: /* kill */ 496 case -ENOENT: 497 case -ESHUTDOWN: 498 return; 499 default: /* error */ 500 dev_err_ratelimited(&intf->dev, "URB failed %d\n", urb->status); 501 goto exit_usb_submit_urb; 502 } 503 504 /* get buffer to write */ 505 buffer = hackrf_get_next_buffer(dev, &dev->rx_buffer_list); 506 if (unlikely(buffer == NULL)) { 507 dev->vb_full++; 508 dev_notice_ratelimited(&intf->dev, 509 "buffer is full - %u packets dropped\n", 510 dev->vb_full); 511 goto exit_usb_submit_urb; 512 } 513 514 len = min_t(unsigned long, vb2_plane_size(&buffer->vb.vb2_buf, 0), 515 urb->actual_length); 516 hackrf_copy_stream(dev, vb2_plane_vaddr(&buffer->vb.vb2_buf, 0), 517 urb->transfer_buffer, len); 518 vb2_set_plane_payload(&buffer->vb.vb2_buf, 0, len); 519 buffer->vb.sequence = dev->sequence++; 520 buffer->vb.vb2_buf.timestamp = ktime_get_ns(); 521 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_DONE); 522exit_usb_submit_urb: 523 usb_submit_urb(urb, GFP_ATOMIC); 524} 525 526static void hackrf_urb_complete_out(struct urb *urb) 527{ 528 struct hackrf_dev *dev = urb->context; 529 struct usb_interface *intf = dev->intf; 530 struct hackrf_buffer *buffer; 531 unsigned int len; 532 533 dev_dbg_ratelimited(&intf->dev, "status=%d length=%u/%u\n", urb->status, 534 urb->actual_length, urb->transfer_buffer_length); 535 536 switch (urb->status) { 537 case 0: /* success */ 538 case -ETIMEDOUT: /* NAK */ 539 break; 540 case -ECONNRESET: /* kill */ 541 case -ENOENT: 542 case -ESHUTDOWN: 543 return; 544 default: /* error */ 545 dev_err_ratelimited(&intf->dev, "URB failed %d\n", urb->status); 546 } 547 548 /* get buffer to read */ 549 buffer = hackrf_get_next_buffer(dev, &dev->tx_buffer_list); 550 if (unlikely(buffer == NULL)) { 551 dev->vb_empty++; 552 dev_notice_ratelimited(&intf->dev, 553 "buffer is empty - %u packets dropped\n", 554 dev->vb_empty); 555 urb->actual_length = 0; 556 goto exit_usb_submit_urb; 557 } 558 559 len = min_t(unsigned long, urb->transfer_buffer_length, 560 vb2_get_plane_payload(&buffer->vb.vb2_buf, 0)); 561 hackrf_copy_stream(dev, urb->transfer_buffer, 562 vb2_plane_vaddr(&buffer->vb.vb2_buf, 0), len); 563 urb->actual_length = len; 564 buffer->vb.sequence = dev->sequence++; 565 buffer->vb.vb2_buf.timestamp = ktime_get_ns(); 566 vb2_buffer_done(&buffer->vb.vb2_buf, VB2_BUF_STATE_DONE); 567exit_usb_submit_urb: 568 usb_submit_urb(urb, GFP_ATOMIC); 569} 570 571static int hackrf_kill_urbs(struct hackrf_dev *dev) 572{ 573 int i; 574 575 for (i = dev->urbs_submitted - 1; i >= 0; i--) { 576 dev_dbg(dev->dev, "kill urb=%d\n", i); 577 /* stop the URB */ 578 usb_kill_urb(dev->urb_list[i]); 579 } 580 dev->urbs_submitted = 0; 581 582 return 0; 583} 584 585static int hackrf_submit_urbs(struct hackrf_dev *dev) 586{ 587 int i, ret; 588 589 for (i = 0; i < dev->urbs_initialized; i++) { 590 dev_dbg(dev->dev, "submit urb=%d\n", i); 591 ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL); 592 if (ret) { 593 dev_err(dev->dev, "Could not submit URB no. %d - get them all back\n", 594 i); 595 hackrf_kill_urbs(dev); 596 return ret; 597 } 598 dev->urbs_submitted++; 599 } 600 601 return 0; 602} 603 604static int hackrf_free_stream_bufs(struct hackrf_dev *dev) 605{ 606 if (dev->flags & USB_STATE_URB_BUF) { 607 while (dev->buf_num) { 608 dev->buf_num--; 609 dev_dbg(dev->dev, "free buf=%d\n", dev->buf_num); 610 usb_free_coherent(dev->udev, dev->buf_size, 611 dev->buf_list[dev->buf_num], 612 dev->dma_addr[dev->buf_num]); 613 } 614 } 615 dev->flags &= ~USB_STATE_URB_BUF; 616 617 return 0; 618} 619 620static int hackrf_alloc_stream_bufs(struct hackrf_dev *dev) 621{ 622 dev->buf_num = 0; 623 dev->buf_size = BULK_BUFFER_SIZE; 624 625 dev_dbg(dev->dev, "all in all I will use %u bytes for streaming\n", 626 MAX_BULK_BUFS * BULK_BUFFER_SIZE); 627 628 for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) { 629 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev, 630 BULK_BUFFER_SIZE, GFP_KERNEL, 631 &dev->dma_addr[dev->buf_num]); 632 if (!dev->buf_list[dev->buf_num]) { 633 dev_dbg(dev->dev, "alloc buf=%d failed\n", 634 dev->buf_num); 635 hackrf_free_stream_bufs(dev); 636 return -ENOMEM; 637 } 638 639 dev_dbg(dev->dev, "alloc buf=%d %p (dma %llu)\n", dev->buf_num, 640 dev->buf_list[dev->buf_num], 641 (long long)dev->dma_addr[dev->buf_num]); 642 dev->flags |= USB_STATE_URB_BUF; 643 } 644 645 return 0; 646} 647 648static int hackrf_free_urbs(struct hackrf_dev *dev) 649{ 650 int i; 651 652 hackrf_kill_urbs(dev); 653 654 for (i = dev->urbs_initialized - 1; i >= 0; i--) { 655 if (dev->urb_list[i]) { 656 dev_dbg(dev->dev, "free urb=%d\n", i); 657 /* free the URBs */ 658 usb_free_urb(dev->urb_list[i]); 659 } 660 } 661 dev->urbs_initialized = 0; 662 663 return 0; 664} 665 666static int hackrf_alloc_urbs(struct hackrf_dev *dev, bool rcv) 667{ 668 int i, j; 669 unsigned int pipe; 670 usb_complete_t complete; 671 672 if (rcv) { 673 pipe = usb_rcvbulkpipe(dev->udev, 0x81); 674 complete = &hackrf_urb_complete_in; 675 } else { 676 pipe = usb_sndbulkpipe(dev->udev, 0x02); 677 complete = &hackrf_urb_complete_out; 678 } 679 680 /* allocate the URBs */ 681 for (i = 0; i < MAX_BULK_BUFS; i++) { 682 dev_dbg(dev->dev, "alloc urb=%d\n", i); 683 dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL); 684 if (!dev->urb_list[i]) { 685 for (j = 0; j < i; j++) 686 usb_free_urb(dev->urb_list[j]); 687 return -ENOMEM; 688 } 689 usb_fill_bulk_urb(dev->urb_list[i], 690 dev->udev, 691 pipe, 692 dev->buf_list[i], 693 BULK_BUFFER_SIZE, 694 complete, dev); 695 696 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 697 dev->urb_list[i]->transfer_dma = dev->dma_addr[i]; 698 dev->urbs_initialized++; 699 } 700 701 return 0; 702} 703 704/* The user yanked out the cable... */ 705static void hackrf_disconnect(struct usb_interface *intf) 706{ 707 struct v4l2_device *v = usb_get_intfdata(intf); 708 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev); 709 710 dev_dbg(dev->dev, "\n"); 711 712 mutex_lock(&dev->vb_queue_lock); 713 mutex_lock(&dev->v4l2_lock); 714 /* No need to keep the urbs around after disconnection */ 715 dev->udev = NULL; 716 v4l2_device_disconnect(&dev->v4l2_dev); 717 video_unregister_device(&dev->tx_vdev); 718 video_unregister_device(&dev->rx_vdev); 719 mutex_unlock(&dev->v4l2_lock); 720 mutex_unlock(&dev->vb_queue_lock); 721 722 v4l2_device_put(&dev->v4l2_dev); 723} 724 725/* Videobuf2 operations */ 726static void hackrf_return_all_buffers(struct vb2_queue *vq, 727 enum vb2_buffer_state state) 728{ 729 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 730 struct usb_interface *intf = dev->intf; 731 struct hackrf_buffer *buffer, *node; 732 struct list_head *buffer_list; 733 unsigned long flags; 734 735 dev_dbg(&intf->dev, "\n"); 736 737 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 738 buffer_list = &dev->rx_buffer_list; 739 else 740 buffer_list = &dev->tx_buffer_list; 741 742 spin_lock_irqsave(&dev->buffer_list_lock, flags); 743 list_for_each_entry_safe(buffer, node, buffer_list, list) { 744 dev_dbg(&intf->dev, "list_for_each_entry_safe\n"); 745 vb2_buffer_done(&buffer->vb.vb2_buf, state); 746 list_del(&buffer->list); 747 } 748 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 749} 750 751static int hackrf_queue_setup(struct vb2_queue *vq, 752 unsigned int *nbuffers, 753 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) 754{ 755 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 756 unsigned int q_num_bufs = vb2_get_num_buffers(vq); 757 758 dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers); 759 760 /* Need at least 8 buffers */ 761 if (q_num_bufs + *nbuffers < 8) 762 *nbuffers = 8 - q_num_bufs; 763 *nplanes = 1; 764 sizes[0] = PAGE_ALIGN(dev->buffersize); 765 766 dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]); 767 return 0; 768} 769 770static void hackrf_buf_queue(struct vb2_buffer *vb) 771{ 772 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 773 struct vb2_queue *vq = vb->vb2_queue; 774 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 775 struct hackrf_buffer *buffer = container_of(vbuf, struct hackrf_buffer, vb); 776 struct list_head *buffer_list; 777 unsigned long flags; 778 779 dev_dbg_ratelimited(&dev->intf->dev, "\n"); 780 781 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 782 buffer_list = &dev->rx_buffer_list; 783 else 784 buffer_list = &dev->tx_buffer_list; 785 786 spin_lock_irqsave(&dev->buffer_list_lock, flags); 787 list_add_tail(&buffer->list, buffer_list); 788 spin_unlock_irqrestore(&dev->buffer_list_lock, flags); 789} 790 791static int hackrf_start_streaming(struct vb2_queue *vq, unsigned int count) 792{ 793 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 794 struct usb_interface *intf = dev->intf; 795 int ret; 796 unsigned int mode; 797 798 dev_dbg(&intf->dev, "count=%i\n", count); 799 800 mutex_lock(&dev->v4l2_lock); 801 802 /* Allow only RX or TX, not both same time */ 803 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) { 804 if (test_bit(TX_ON, &dev->flags)) { 805 ret = -EBUSY; 806 goto err_hackrf_return_all_buffers; 807 } 808 809 mode = 1; 810 set_bit(RX_ON, &dev->flags); 811 } else { 812 if (test_bit(RX_ON, &dev->flags)) { 813 ret = -EBUSY; 814 goto err_hackrf_return_all_buffers; 815 } 816 817 mode = 2; 818 set_bit(TX_ON, &dev->flags); 819 } 820 821 dev->sequence = 0; 822 823 ret = hackrf_alloc_stream_bufs(dev); 824 if (ret) 825 goto err; 826 827 ret = hackrf_alloc_urbs(dev, (mode == 1)); 828 if (ret) 829 goto err; 830 831 ret = hackrf_submit_urbs(dev); 832 if (ret) 833 goto err; 834 835 ret = hackrf_set_params(dev); 836 if (ret) 837 goto err; 838 839 /* start hardware streaming */ 840 ret = hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, mode, 0, NULL, 0); 841 if (ret) 842 goto err; 843 844 mutex_unlock(&dev->v4l2_lock); 845 846 return 0; 847err: 848 hackrf_kill_urbs(dev); 849 hackrf_free_urbs(dev); 850 hackrf_free_stream_bufs(dev); 851 clear_bit(RX_ON, &dev->flags); 852 clear_bit(TX_ON, &dev->flags); 853err_hackrf_return_all_buffers: 854 hackrf_return_all_buffers(vq, VB2_BUF_STATE_QUEUED); 855 mutex_unlock(&dev->v4l2_lock); 856 dev_dbg(&intf->dev, "failed=%d\n", ret); 857 return ret; 858} 859 860static void hackrf_stop_streaming(struct vb2_queue *vq) 861{ 862 struct hackrf_dev *dev = vb2_get_drv_priv(vq); 863 struct usb_interface *intf = dev->intf; 864 865 dev_dbg(&intf->dev, "\n"); 866 867 mutex_lock(&dev->v4l2_lock); 868 869 /* stop hardware streaming */ 870 hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 0, 0, NULL, 0); 871 872 hackrf_kill_urbs(dev); 873 hackrf_free_urbs(dev); 874 hackrf_free_stream_bufs(dev); 875 876 hackrf_return_all_buffers(vq, VB2_BUF_STATE_ERROR); 877 878 if (vq->type == V4L2_BUF_TYPE_SDR_CAPTURE) 879 clear_bit(RX_ON, &dev->flags); 880 else 881 clear_bit(TX_ON, &dev->flags); 882 883 mutex_unlock(&dev->v4l2_lock); 884} 885 886static const struct vb2_ops hackrf_vb2_ops = { 887 .queue_setup = hackrf_queue_setup, 888 .buf_queue = hackrf_buf_queue, 889 .start_streaming = hackrf_start_streaming, 890 .stop_streaming = hackrf_stop_streaming, 891 .wait_prepare = vb2_ops_wait_prepare, 892 .wait_finish = vb2_ops_wait_finish, 893}; 894 895static int hackrf_querycap(struct file *file, void *fh, 896 struct v4l2_capability *cap) 897{ 898 struct hackrf_dev *dev = video_drvdata(file); 899 struct usb_interface *intf = dev->intf; 900 901 dev_dbg(&intf->dev, "\n"); 902 903 cap->capabilities = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER | 904 V4L2_CAP_SDR_OUTPUT | V4L2_CAP_MODULATOR | 905 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE | 906 V4L2_CAP_DEVICE_CAPS; 907 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); 908 strscpy(cap->card, dev->rx_vdev.name, sizeof(cap->card)); 909 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 910 911 return 0; 912} 913 914static int hackrf_s_fmt_sdr(struct file *file, void *priv, 915 struct v4l2_format *f) 916{ 917 struct hackrf_dev *dev = video_drvdata(file); 918 struct video_device *vdev = video_devdata(file); 919 struct vb2_queue *q; 920 int i; 921 922 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 923 (char *)&f->fmt.sdr.pixelformat); 924 925 if (vdev->vfl_dir == VFL_DIR_RX) 926 q = &dev->rx_vb2_queue; 927 else 928 q = &dev->tx_vb2_queue; 929 930 if (vb2_is_busy(q)) 931 return -EBUSY; 932 933 for (i = 0; i < NUM_FORMATS; i++) { 934 if (f->fmt.sdr.pixelformat == formats[i].pixelformat) { 935 dev->pixelformat = formats[i].pixelformat; 936 dev->buffersize = formats[i].buffersize; 937 f->fmt.sdr.buffersize = formats[i].buffersize; 938 return 0; 939 } 940 } 941 942 dev->pixelformat = formats[0].pixelformat; 943 dev->buffersize = formats[0].buffersize; 944 f->fmt.sdr.pixelformat = formats[0].pixelformat; 945 f->fmt.sdr.buffersize = formats[0].buffersize; 946 947 return 0; 948} 949 950static int hackrf_g_fmt_sdr(struct file *file, void *priv, 951 struct v4l2_format *f) 952{ 953 struct hackrf_dev *dev = video_drvdata(file); 954 955 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 956 (char *)&dev->pixelformat); 957 958 f->fmt.sdr.pixelformat = dev->pixelformat; 959 f->fmt.sdr.buffersize = dev->buffersize; 960 961 return 0; 962} 963 964static int hackrf_try_fmt_sdr(struct file *file, void *priv, 965 struct v4l2_format *f) 966{ 967 struct hackrf_dev *dev = video_drvdata(file); 968 int i; 969 970 dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n", 971 (char *)&f->fmt.sdr.pixelformat); 972 973 for (i = 0; i < NUM_FORMATS; i++) { 974 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { 975 f->fmt.sdr.buffersize = formats[i].buffersize; 976 return 0; 977 } 978 } 979 980 f->fmt.sdr.pixelformat = formats[0].pixelformat; 981 f->fmt.sdr.buffersize = formats[0].buffersize; 982 983 return 0; 984} 985 986static int hackrf_enum_fmt_sdr(struct file *file, void *priv, 987 struct v4l2_fmtdesc *f) 988{ 989 struct hackrf_dev *dev = video_drvdata(file); 990 991 dev_dbg(dev->dev, "index=%d\n", f->index); 992 993 if (f->index >= NUM_FORMATS) 994 return -EINVAL; 995 996 f->pixelformat = formats[f->index].pixelformat; 997 998 return 0; 999} 1000 1001static int hackrf_s_tuner(struct file *file, void *priv, 1002 const struct v4l2_tuner *v) 1003{ 1004 struct hackrf_dev *dev = video_drvdata(file); 1005 int ret; 1006 1007 dev_dbg(dev->dev, "index=%d\n", v->index); 1008 1009 if (v->index == 0) 1010 ret = 0; 1011 else if (v->index == 1) 1012 ret = 0; 1013 else 1014 ret = -EINVAL; 1015 1016 return ret; 1017} 1018 1019static int hackrf_g_tuner(struct file *file, void *priv, 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 strscpy(v->name, "HackRF ADC", sizeof(v->name)); 1028 v->type = V4L2_TUNER_SDR; 1029 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1030 v->rangelow = bands_adc_dac[0].rangelow; 1031 v->rangehigh = bands_adc_dac[0].rangehigh; 1032 ret = 0; 1033 } else if (v->index == 1) { 1034 strscpy(v->name, "HackRF RF", sizeof(v->name)); 1035 v->type = V4L2_TUNER_RF; 1036 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1037 v->rangelow = bands_rx_tx[0].rangelow; 1038 v->rangehigh = bands_rx_tx[0].rangehigh; 1039 ret = 0; 1040 } else { 1041 ret = -EINVAL; 1042 } 1043 1044 return ret; 1045} 1046 1047static int hackrf_s_modulator(struct file *file, void *fh, 1048 const struct v4l2_modulator *a) 1049{ 1050 struct hackrf_dev *dev = video_drvdata(file); 1051 1052 dev_dbg(dev->dev, "index=%d\n", a->index); 1053 1054 return a->index > 1 ? -EINVAL : 0; 1055} 1056 1057static int hackrf_g_modulator(struct file *file, void *fh, 1058 struct v4l2_modulator *a) 1059{ 1060 struct hackrf_dev *dev = video_drvdata(file); 1061 int ret; 1062 1063 dev_dbg(dev->dev, "index=%d\n", a->index); 1064 1065 if (a->index == 0) { 1066 strscpy(a->name, "HackRF DAC", sizeof(a->name)); 1067 a->type = V4L2_TUNER_SDR; 1068 a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1069 a->rangelow = bands_adc_dac[0].rangelow; 1070 a->rangehigh = bands_adc_dac[0].rangehigh; 1071 ret = 0; 1072 } else if (a->index == 1) { 1073 strscpy(a->name, "HackRF RF", sizeof(a->name)); 1074 a->type = V4L2_TUNER_RF; 1075 a->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 1076 a->rangelow = bands_rx_tx[0].rangelow; 1077 a->rangehigh = bands_rx_tx[0].rangehigh; 1078 ret = 0; 1079 } else { 1080 ret = -EINVAL; 1081 } 1082 1083 return ret; 1084} 1085 1086static int hackrf_s_frequency(struct file *file, void *priv, 1087 const struct v4l2_frequency *f) 1088{ 1089 struct hackrf_dev *dev = video_drvdata(file); 1090 struct usb_interface *intf = dev->intf; 1091 struct video_device *vdev = video_devdata(file); 1092 int ret; 1093 unsigned int uitmp; 1094 1095 dev_dbg(&intf->dev, "tuner=%d type=%d frequency=%u\n", 1096 f->tuner, f->type, f->frequency); 1097 1098 if (f->tuner == 0) { 1099 uitmp = clamp(f->frequency, bands_adc_dac[0].rangelow, 1100 bands_adc_dac[0].rangehigh); 1101 if (vdev->vfl_dir == VFL_DIR_RX) { 1102 dev->f_adc = uitmp; 1103 set_bit(RX_ADC_FREQUENCY, &dev->flags); 1104 } else { 1105 dev->f_dac = uitmp; 1106 set_bit(TX_DAC_FREQUENCY, &dev->flags); 1107 } 1108 } else if (f->tuner == 1) { 1109 uitmp = clamp(f->frequency, bands_rx_tx[0].rangelow, 1110 bands_rx_tx[0].rangehigh); 1111 if (vdev->vfl_dir == VFL_DIR_RX) { 1112 dev->f_rx = uitmp; 1113 set_bit(RX_RF_FREQUENCY, &dev->flags); 1114 } else { 1115 dev->f_tx = uitmp; 1116 set_bit(TX_RF_FREQUENCY, &dev->flags); 1117 } 1118 } else { 1119 ret = -EINVAL; 1120 goto err; 1121 } 1122 1123 ret = hackrf_set_params(dev); 1124 if (ret) 1125 goto err; 1126 1127 return 0; 1128err: 1129 dev_dbg(&intf->dev, "failed=%d\n", ret); 1130 return ret; 1131} 1132 1133static int hackrf_g_frequency(struct file *file, void *priv, 1134 struct v4l2_frequency *f) 1135{ 1136 struct hackrf_dev *dev = video_drvdata(file); 1137 struct usb_interface *intf = dev->intf; 1138 struct video_device *vdev = video_devdata(file); 1139 int ret; 1140 1141 dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type); 1142 1143 if (f->tuner == 0) { 1144 f->type = V4L2_TUNER_SDR; 1145 if (vdev->vfl_dir == VFL_DIR_RX) 1146 f->frequency = dev->f_adc; 1147 else 1148 f->frequency = dev->f_dac; 1149 } else if (f->tuner == 1) { 1150 f->type = V4L2_TUNER_RF; 1151 if (vdev->vfl_dir == VFL_DIR_RX) 1152 f->frequency = dev->f_rx; 1153 else 1154 f->frequency = dev->f_tx; 1155 } else { 1156 ret = -EINVAL; 1157 goto err; 1158 } 1159 1160 return 0; 1161err: 1162 dev_dbg(&intf->dev, "failed=%d\n", ret); 1163 return ret; 1164} 1165 1166static int hackrf_enum_freq_bands(struct file *file, void *priv, 1167 struct v4l2_frequency_band *band) 1168{ 1169 struct hackrf_dev *dev = video_drvdata(file); 1170 int ret; 1171 1172 dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n", 1173 band->tuner, band->type, band->index); 1174 1175 if (band->tuner == 0) { 1176 if (band->index >= ARRAY_SIZE(bands_adc_dac)) { 1177 ret = -EINVAL; 1178 } else { 1179 *band = bands_adc_dac[band->index]; 1180 ret = 0; 1181 } 1182 } else if (band->tuner == 1) { 1183 if (band->index >= ARRAY_SIZE(bands_rx_tx)) { 1184 ret = -EINVAL; 1185 } else { 1186 *band = bands_rx_tx[band->index]; 1187 ret = 0; 1188 } 1189 } else { 1190 ret = -EINVAL; 1191 } 1192 1193 return ret; 1194} 1195 1196static const struct v4l2_ioctl_ops hackrf_ioctl_ops = { 1197 .vidioc_querycap = hackrf_querycap, 1198 1199 .vidioc_s_fmt_sdr_cap = hackrf_s_fmt_sdr, 1200 .vidioc_g_fmt_sdr_cap = hackrf_g_fmt_sdr, 1201 .vidioc_enum_fmt_sdr_cap = hackrf_enum_fmt_sdr, 1202 .vidioc_try_fmt_sdr_cap = hackrf_try_fmt_sdr, 1203 1204 .vidioc_s_fmt_sdr_out = hackrf_s_fmt_sdr, 1205 .vidioc_g_fmt_sdr_out = hackrf_g_fmt_sdr, 1206 .vidioc_enum_fmt_sdr_out = hackrf_enum_fmt_sdr, 1207 .vidioc_try_fmt_sdr_out = hackrf_try_fmt_sdr, 1208 1209 .vidioc_reqbufs = vb2_ioctl_reqbufs, 1210 .vidioc_create_bufs = vb2_ioctl_create_bufs, 1211 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 1212 .vidioc_querybuf = vb2_ioctl_querybuf, 1213 .vidioc_qbuf = vb2_ioctl_qbuf, 1214 .vidioc_dqbuf = vb2_ioctl_dqbuf, 1215 .vidioc_expbuf = vb2_ioctl_expbuf, 1216 1217 .vidioc_streamon = vb2_ioctl_streamon, 1218 .vidioc_streamoff = vb2_ioctl_streamoff, 1219 1220 .vidioc_s_tuner = hackrf_s_tuner, 1221 .vidioc_g_tuner = hackrf_g_tuner, 1222 1223 .vidioc_s_modulator = hackrf_s_modulator, 1224 .vidioc_g_modulator = hackrf_g_modulator, 1225 1226 .vidioc_s_frequency = hackrf_s_frequency, 1227 .vidioc_g_frequency = hackrf_g_frequency, 1228 .vidioc_enum_freq_bands = hackrf_enum_freq_bands, 1229 1230 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1231 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1232 .vidioc_log_status = v4l2_ctrl_log_status, 1233}; 1234 1235static const struct v4l2_file_operations hackrf_fops = { 1236 .owner = THIS_MODULE, 1237 .open = v4l2_fh_open, 1238 .release = vb2_fop_release, 1239 .read = vb2_fop_read, 1240 .write = vb2_fop_write, 1241 .poll = vb2_fop_poll, 1242 .mmap = vb2_fop_mmap, 1243 .unlocked_ioctl = video_ioctl2, 1244}; 1245 1246static const struct video_device hackrf_template = { 1247 .name = "HackRF One", 1248 .release = video_device_release_empty, 1249 .fops = &hackrf_fops, 1250 .ioctl_ops = &hackrf_ioctl_ops, 1251}; 1252 1253static void hackrf_video_release(struct v4l2_device *v) 1254{ 1255 struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev); 1256 1257 dev_dbg(dev->dev, "\n"); 1258 1259 v4l2_ctrl_handler_free(&dev->rx_ctrl_handler); 1260 v4l2_ctrl_handler_free(&dev->tx_ctrl_handler); 1261 v4l2_device_unregister(&dev->v4l2_dev); 1262 kfree(dev); 1263} 1264 1265static int hackrf_s_ctrl_rx(struct v4l2_ctrl *ctrl) 1266{ 1267 struct hackrf_dev *dev = container_of(ctrl->handler, 1268 struct hackrf_dev, rx_ctrl_handler); 1269 struct usb_interface *intf = dev->intf; 1270 int ret; 1271 1272 switch (ctrl->id) { 1273 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1274 case V4L2_CID_RF_TUNER_BANDWIDTH: 1275 set_bit(RX_BANDWIDTH, &dev->flags); 1276 break; 1277 case V4L2_CID_RF_TUNER_RF_GAIN: 1278 set_bit(RX_RF_GAIN, &dev->flags); 1279 break; 1280 case V4L2_CID_RF_TUNER_LNA_GAIN: 1281 set_bit(RX_LNA_GAIN, &dev->flags); 1282 break; 1283 case V4L2_CID_RF_TUNER_IF_GAIN: 1284 set_bit(RX_IF_GAIN, &dev->flags); 1285 break; 1286 default: 1287 dev_dbg(&intf->dev, "unknown ctrl: id=%d name=%s\n", 1288 ctrl->id, ctrl->name); 1289 ret = -EINVAL; 1290 goto err; 1291 } 1292 1293 ret = hackrf_set_params(dev); 1294 if (ret) 1295 goto err; 1296 1297 return 0; 1298err: 1299 dev_dbg(&intf->dev, "failed=%d\n", ret); 1300 return ret; 1301} 1302 1303static int hackrf_s_ctrl_tx(struct v4l2_ctrl *ctrl) 1304{ 1305 struct hackrf_dev *dev = container_of(ctrl->handler, 1306 struct hackrf_dev, tx_ctrl_handler); 1307 struct usb_interface *intf = dev->intf; 1308 int ret; 1309 1310 switch (ctrl->id) { 1311 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 1312 case V4L2_CID_RF_TUNER_BANDWIDTH: 1313 set_bit(TX_BANDWIDTH, &dev->flags); 1314 break; 1315 case V4L2_CID_RF_TUNER_LNA_GAIN: 1316 set_bit(TX_LNA_GAIN, &dev->flags); 1317 break; 1318 case V4L2_CID_RF_TUNER_RF_GAIN: 1319 set_bit(TX_RF_GAIN, &dev->flags); 1320 break; 1321 default: 1322 dev_dbg(&intf->dev, "unknown ctrl: id=%d name=%s\n", 1323 ctrl->id, ctrl->name); 1324 ret = -EINVAL; 1325 goto err; 1326 } 1327 1328 ret = hackrf_set_params(dev); 1329 if (ret) 1330 goto err; 1331 1332 return 0; 1333err: 1334 dev_dbg(&intf->dev, "failed=%d\n", ret); 1335 return ret; 1336} 1337 1338static const struct v4l2_ctrl_ops hackrf_ctrl_ops_rx = { 1339 .s_ctrl = hackrf_s_ctrl_rx, 1340}; 1341 1342static const struct v4l2_ctrl_ops hackrf_ctrl_ops_tx = { 1343 .s_ctrl = hackrf_s_ctrl_tx, 1344}; 1345 1346static int hackrf_probe(struct usb_interface *intf, 1347 const struct usb_device_id *id) 1348{ 1349 struct hackrf_dev *dev; 1350 int ret; 1351 u8 u8tmp, buf[BUF_SIZE]; 1352 1353 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1354 if (!dev) { 1355 ret = -ENOMEM; 1356 goto err; 1357 } 1358 1359 mutex_init(&dev->v4l2_lock); 1360 mutex_init(&dev->vb_queue_lock); 1361 spin_lock_init(&dev->buffer_list_lock); 1362 INIT_LIST_HEAD(&dev->rx_buffer_list); 1363 INIT_LIST_HEAD(&dev->tx_buffer_list); 1364 dev->intf = intf; 1365 dev->dev = &intf->dev; 1366 dev->udev = interface_to_usbdev(intf); 1367 dev->pixelformat = formats[0].pixelformat; 1368 dev->buffersize = formats[0].buffersize; 1369 dev->f_adc = bands_adc_dac[0].rangelow; 1370 dev->f_dac = bands_adc_dac[0].rangelow; 1371 dev->f_rx = bands_rx_tx[0].rangelow; 1372 dev->f_tx = bands_rx_tx[0].rangelow; 1373 set_bit(RX_ADC_FREQUENCY, &dev->flags); 1374 set_bit(TX_DAC_FREQUENCY, &dev->flags); 1375 set_bit(RX_RF_FREQUENCY, &dev->flags); 1376 set_bit(TX_RF_FREQUENCY, &dev->flags); 1377 1378 /* Detect device */ 1379 ret = hackrf_ctrl_msg(dev, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1); 1380 if (ret == 0) 1381 ret = hackrf_ctrl_msg(dev, CMD_VERSION_STRING_READ, 0, 0, 1382 buf, BUF_SIZE); 1383 if (ret) { 1384 dev_err(dev->dev, "Could not detect board\n"); 1385 goto err_kfree; 1386 } 1387 1388 buf[BUF_SIZE - 1] = '\0'; 1389 dev_info(dev->dev, "Board ID: %02x\n", u8tmp); 1390 dev_info(dev->dev, "Firmware version: %s\n", buf); 1391 1392 /* Init vb2 queue structure for receiver */ 1393 dev->rx_vb2_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE; 1394 dev->rx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | 1395 VB2_READ; 1396 dev->rx_vb2_queue.ops = &hackrf_vb2_ops; 1397 dev->rx_vb2_queue.mem_ops = &vb2_vmalloc_memops; 1398 dev->rx_vb2_queue.drv_priv = dev; 1399 dev->rx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer); 1400 dev->rx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1401 ret = vb2_queue_init(&dev->rx_vb2_queue); 1402 if (ret) { 1403 dev_err(dev->dev, "Could not initialize rx vb2 queue\n"); 1404 goto err_kfree; 1405 } 1406 1407 /* Init vb2 queue structure for transmitter */ 1408 dev->tx_vb2_queue.type = V4L2_BUF_TYPE_SDR_OUTPUT; 1409 dev->tx_vb2_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | 1410 VB2_WRITE; 1411 dev->tx_vb2_queue.ops = &hackrf_vb2_ops; 1412 dev->tx_vb2_queue.mem_ops = &vb2_vmalloc_memops; 1413 dev->tx_vb2_queue.drv_priv = dev; 1414 dev->tx_vb2_queue.buf_struct_size = sizeof(struct hackrf_buffer); 1415 dev->tx_vb2_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1416 ret = vb2_queue_init(&dev->tx_vb2_queue); 1417 if (ret) { 1418 dev_err(dev->dev, "Could not initialize tx vb2 queue\n"); 1419 goto err_kfree; 1420 } 1421 1422 /* Register controls for receiver */ 1423 v4l2_ctrl_handler_init(&dev->rx_ctrl_handler, 5); 1424 dev->rx_bandwidth_auto = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1425 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 1426 0, 1, 0, 1); 1427 dev->rx_bandwidth = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1428 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_BANDWIDTH, 1429 1750000, 28000000, 50000, 1750000); 1430 v4l2_ctrl_auto_cluster(2, &dev->rx_bandwidth_auto, 0, false); 1431 dev->rx_rf_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1432 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 12, 12, 0); 1433 dev->rx_lna_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1434 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0); 1435 dev->rx_if_gain = v4l2_ctrl_new_std(&dev->rx_ctrl_handler, 1436 &hackrf_ctrl_ops_rx, V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0); 1437 if (dev->rx_ctrl_handler.error) { 1438 ret = dev->rx_ctrl_handler.error; 1439 dev_err(dev->dev, "Could not initialize controls\n"); 1440 goto err_v4l2_ctrl_handler_free_rx; 1441 } 1442 v4l2_ctrl_grab(dev->rx_rf_gain, !hackrf_enable_rf_gain_ctrl); 1443 v4l2_ctrl_handler_setup(&dev->rx_ctrl_handler); 1444 1445 /* Register controls for transmitter */ 1446 v4l2_ctrl_handler_init(&dev->tx_ctrl_handler, 4); 1447 dev->tx_bandwidth_auto = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1448 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 1449 0, 1, 0, 1); 1450 dev->tx_bandwidth = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1451 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_BANDWIDTH, 1452 1750000, 28000000, 50000, 1750000); 1453 v4l2_ctrl_auto_cluster(2, &dev->tx_bandwidth_auto, 0, false); 1454 dev->tx_lna_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1455 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_LNA_GAIN, 0, 47, 1, 0); 1456 dev->tx_rf_gain = v4l2_ctrl_new_std(&dev->tx_ctrl_handler, 1457 &hackrf_ctrl_ops_tx, V4L2_CID_RF_TUNER_RF_GAIN, 0, 15, 15, 0); 1458 if (dev->tx_ctrl_handler.error) { 1459 ret = dev->tx_ctrl_handler.error; 1460 dev_err(dev->dev, "Could not initialize controls\n"); 1461 goto err_v4l2_ctrl_handler_free_tx; 1462 } 1463 v4l2_ctrl_grab(dev->tx_rf_gain, !hackrf_enable_rf_gain_ctrl); 1464 v4l2_ctrl_handler_setup(&dev->tx_ctrl_handler); 1465 1466 /* Register the v4l2_device structure */ 1467 dev->v4l2_dev.release = hackrf_video_release; 1468 ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev); 1469 if (ret) { 1470 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret); 1471 goto err_v4l2_ctrl_handler_free_tx; 1472 } 1473 1474 /* Init video_device structure for receiver */ 1475 dev->rx_vdev = hackrf_template; 1476 dev->rx_vdev.queue = &dev->rx_vb2_queue; 1477 dev->rx_vdev.queue->lock = &dev->vb_queue_lock; 1478 dev->rx_vdev.v4l2_dev = &dev->v4l2_dev; 1479 dev->rx_vdev.ctrl_handler = &dev->rx_ctrl_handler; 1480 dev->rx_vdev.lock = &dev->v4l2_lock; 1481 dev->rx_vdev.vfl_dir = VFL_DIR_RX; 1482 dev->rx_vdev.device_caps = V4L2_CAP_STREAMING | V4L2_CAP_READWRITE | 1483 V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER; 1484 video_set_drvdata(&dev->rx_vdev, dev); 1485 ret = video_register_device(&dev->rx_vdev, VFL_TYPE_SDR, -1); 1486 if (ret) { 1487 dev_err(dev->dev, 1488 "Failed to register as video device (%d)\n", ret); 1489 goto err_v4l2_device_unregister; 1490 } 1491 dev_info(dev->dev, "Registered as %s\n", 1492 video_device_node_name(&dev->rx_vdev)); 1493 1494 /* Init video_device structure for transmitter */ 1495 dev->tx_vdev = hackrf_template; 1496 dev->tx_vdev.queue = &dev->tx_vb2_queue; 1497 dev->tx_vdev.queue->lock = &dev->vb_queue_lock; 1498 dev->tx_vdev.v4l2_dev = &dev->v4l2_dev; 1499 dev->tx_vdev.ctrl_handler = &dev->tx_ctrl_handler; 1500 dev->tx_vdev.lock = &dev->v4l2_lock; 1501 dev->tx_vdev.vfl_dir = VFL_DIR_TX; 1502 dev->tx_vdev.device_caps = V4L2_CAP_STREAMING | V4L2_CAP_READWRITE | 1503 V4L2_CAP_SDR_OUTPUT | V4L2_CAP_MODULATOR; 1504 video_set_drvdata(&dev->tx_vdev, dev); 1505 ret = video_register_device(&dev->tx_vdev, VFL_TYPE_SDR, -1); 1506 if (ret) { 1507 dev_err(dev->dev, 1508 "Failed to register as video device (%d)\n", ret); 1509 goto err_video_unregister_device_rx; 1510 } 1511 dev_info(dev->dev, "Registered as %s\n", 1512 video_device_node_name(&dev->tx_vdev)); 1513 1514 dev_notice(dev->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); 1515 return 0; 1516err_video_unregister_device_rx: 1517 video_unregister_device(&dev->rx_vdev); 1518err_v4l2_device_unregister: 1519 v4l2_device_unregister(&dev->v4l2_dev); 1520err_v4l2_ctrl_handler_free_tx: 1521 v4l2_ctrl_handler_free(&dev->tx_ctrl_handler); 1522err_v4l2_ctrl_handler_free_rx: 1523 v4l2_ctrl_handler_free(&dev->rx_ctrl_handler); 1524err_kfree: 1525 kfree(dev); 1526err: 1527 dev_dbg(&intf->dev, "failed=%d\n", ret); 1528 return ret; 1529} 1530 1531/* USB device ID list */ 1532static const struct usb_device_id hackrf_id_table[] = { 1533 { USB_DEVICE(0x1d50, 0x6089) }, /* HackRF One */ 1534 { } 1535}; 1536MODULE_DEVICE_TABLE(usb, hackrf_id_table); 1537 1538/* USB subsystem interface */ 1539static struct usb_driver hackrf_driver = { 1540 .name = KBUILD_MODNAME, 1541 .probe = hackrf_probe, 1542 .disconnect = hackrf_disconnect, 1543 .id_table = hackrf_id_table, 1544}; 1545 1546module_usb_driver(hackrf_driver); 1547 1548MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 1549MODULE_DESCRIPTION("HackRF"); 1550MODULE_LICENSE("GPL"); 1551