drivers/media/usb/msi2500/msi2500.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Mirics MSi2500 driver
   4  * Mirics MSi3101 SDR Dongle driver
   5  *
   6  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   7  *
   8  * That driver is somehow based of pwc driver:
   9  *  (C) 1999-2004 Nemosoft Unv.
  10  *  (C) 2004-2006 Luc Saillard (luc@saillard.org)
  11  *  (C) 2011 Hans de Goede <hdegoede@redhat.com>
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/slab.h>
  16 #include <asm/div64.h>
  17 #include <media/v4l2-device.h>
  18 #include <media/v4l2-ioctl.h>
  19 #include <media/v4l2-ctrls.h>
  20 #include <media/v4l2-event.h>
  21 #include <linux/usb.h>
  22 #include <media/videobuf2-v4l2.h>
  23 #include <media/videobuf2-vmalloc.h>
  24 #include <linux/spi/spi.h>
  25
  26 static bool msi2500_emulated_fmt;
  27 module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
  28 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  29
  30 /*
  31  *   iConfiguration          0
  32  *     bInterfaceNumber        0
  33  *     bAlternateSetting       1
  34  *     bNumEndpoints           1
  35  *       bEndpointAddress     0x81  EP 1 IN
  36  *       bmAttributes            1
  37  *         Transfer Type            Isochronous
  38  *       wMaxPacketSize     0x1400  3x 1024 bytes
  39  *       bInterval               1
  40  */
  41 #define MAX_ISO_BUFS            (8)
  42 #define ISO_FRAMES_PER_DESC     (8)
  43 #define ISO_MAX_FRAME_SIZE      (3 * 1024)
  44 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  45 #define MAX_ISOC_ERRORS         20
  46
  47 /*
  48  * TODO: These formats should be moved to V4L2 API. Formats are currently
  49  * disabled from formats[] table, not visible to userspace.
  50  */
  51  /* signed 12-bit */
  52 #define MSI2500_PIX_FMT_SDR_S12         v4l2_fourcc('D', 'S', '1', '2')
  53 /* Mirics MSi2500 format 384 */
  54 #define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
  55
  56 static const struct v4l2_frequency_band bands[] = {
  57         {
  58                 .tuner = 0,
  59                 .type = V4L2_TUNER_ADC,
  60                 .index = 0,
  61                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  62                 .rangelow   =  1200000,
  63                 .rangehigh  = 15000000,
  64         },
  65 };
  66
  67 /* stream formats */
  68 struct msi2500_format {
  69         u32     pixelformat;
  70         u32     buffersize;
  71 };
  72
  73 /* format descriptions for capture and preview */
  74 static struct msi2500_format formats[] = {
  75         {
  76                 .pixelformat    = V4L2_SDR_FMT_CS8,
  77                 .buffersize     = 3 * 1008,
  78 #if 0
  79         }, {
  80                 .pixelformat    = MSI2500_PIX_FMT_SDR_MSI2500_384,
  81         }, {
  82                 .pixelformat    = MSI2500_PIX_FMT_SDR_S12,
  83 #endif
  84         }, {
  85                 .pixelformat    = V4L2_SDR_FMT_CS14LE,
  86                 .buffersize     = 3 * 1008,
  87         }, {
  88                 .pixelformat    = V4L2_SDR_FMT_CU8,
  89                 .buffersize     = 3 * 1008,
  90         }, {
  91                 .pixelformat    =  V4L2_SDR_FMT_CU16LE,
  92                 .buffersize     = 3 * 1008,
  93         },
  94 };
  95
  96 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  97
  98 /* intermediate buffers with raw data from the USB device */
  99 struct msi2500_frame_buf {
 100         /* common v4l buffer stuff -- must be first */
 101         struct vb2_v4l2_buffer vb;
 102         struct list_head list;
 103 };
 104
 105 struct msi2500_dev {
 106         struct device *dev;
 107         struct video_device vdev;
 108         struct v4l2_device v4l2_dev;
 109         struct v4l2_subdev *v4l2_subdev;
 110         struct spi_controller *ctlr;
 111
 112         /* videobuf2 queue and queued buffers list */
 113         struct vb2_queue vb_queue;
 114         struct list_head queued_bufs;
 115         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 116
 117         /* Note if taking both locks v4l2_lock must always be locked first! */
 118         struct mutex v4l2_lock;      /* Protects everything else */
 119         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 120
 121         /* Pointer to our usb_device, will be NULL after unplug */
 122         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 123
 124         unsigned int f_adc;
 125         u32 pixelformat;
 126         u32 buffersize;
 127         unsigned int num_formats;
 128
 129         unsigned int isoc_errors; /* number of contiguous ISOC errors */
 130         unsigned int vb_full; /* vb is full and packets dropped */
 131
 132         struct urb *urbs[MAX_ISO_BUFS];
 133
 134         /* Controls */
 135         struct v4l2_ctrl_handler hdl;
 136
 137         u32 next_sample; /* for track lost packets */
 138         u32 sample; /* for sample rate calc */
 139         unsigned long jiffies_next;
 140 };
 141
 142 /* Private functions */
 143 static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
 144                                                         struct msi2500_dev *dev)
 145 {
 146         unsigned long flags;
 147         struct msi2500_frame_buf *buf = NULL;
 148
 149         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 150         if (list_empty(&dev->queued_bufs))
 151                 goto leave;
 152
 153         buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
 154         list_del(&buf->list);
 155 leave:
 156         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 157         return buf;
 158 }
 159
 160 /*
 161  * +===========================================================================
 162  * |   00-1023 | USB packet type '504'
 163  * +===========================================================================
 164  * |   00-  03 | sequence number of first sample in that USB packet
 165  * +---------------------------------------------------------------------------
 166  * |   04-  15 | garbage
 167  * +---------------------------------------------------------------------------
 168  * |   16-1023 | samples
 169  * +---------------------------------------------------------------------------
 170  * signed 8-bit sample
 171  * 504 * 2 = 1008 samples
 172  *
 173  *
 174  * +===========================================================================
 175  * |   00-1023 | USB packet type '384'
 176  * +===========================================================================
 177  * |   00-  03 | sequence number of first sample in that USB packet
 178  * +---------------------------------------------------------------------------
 179  * |   04-  15 | garbage
 180  * +---------------------------------------------------------------------------
 181  * |   16- 175 | samples
 182  * +---------------------------------------------------------------------------
 183  * |  176- 179 | control bits for previous samples
 184  * +---------------------------------------------------------------------------
 185  * |  180- 339 | samples
 186  * +---------------------------------------------------------------------------
 187  * |  340- 343 | control bits for previous samples
 188  * +---------------------------------------------------------------------------
 189  * |  344- 503 | samples
 190  * +---------------------------------------------------------------------------
 191  * |  504- 507 | control bits for previous samples
 192  * +---------------------------------------------------------------------------
 193  * |  508- 667 | samples
 194  * +---------------------------------------------------------------------------
 195  * |  668- 671 | control bits for previous samples
 196  * +---------------------------------------------------------------------------
 197  * |  672- 831 | samples
 198  * +---------------------------------------------------------------------------
 199  * |  832- 835 | control bits for previous samples
 200  * +---------------------------------------------------------------------------
 201  * |  836- 995 | samples
 202  * +---------------------------------------------------------------------------
 203  * |  996- 999 | control bits for previous samples
 204  * +---------------------------------------------------------------------------
 205  * | 1000-1023 | garbage
 206  * +---------------------------------------------------------------------------
 207  *
 208  * Bytes 4 - 7 could have some meaning?
 209  *
 210  * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
 211  * numbers. This results one 2-bit number for 8 samples. It is likely used for
 212  * bit shifting sample by given bits, increasing actual sampling resolution.
 213  * Number 2 (0b10) was never seen.
 214  *
 215  * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
 216  *
 217  *
 218  * +===========================================================================
 219  * |   00-1023 | USB packet type '336'
 220  * +===========================================================================
 221  * |   00-  03 | sequence number of first sample in that USB packet
 222  * +---------------------------------------------------------------------------
 223  * |   04-  15 | garbage
 224  * +---------------------------------------------------------------------------
 225  * |   16-1023 | samples
 226  * +---------------------------------------------------------------------------
 227  * signed 12-bit sample
 228  *
 229  *
 230  * +===========================================================================
 231  * |   00-1023 | USB packet type '252'
 232  * +===========================================================================
 233  * |   00-  03 | sequence number of first sample in that USB packet
 234  * +---------------------------------------------------------------------------
 235  * |   04-  15 | garbage
 236  * +---------------------------------------------------------------------------
 237  * |   16-1023 | samples
 238  * +---------------------------------------------------------------------------
 239  * signed 14-bit sample
 240  */
 241
 242 static int msi2500_convert_stream(struct msi2500_dev *dev, u8 *dst, u8 *src,
 243                                   unsigned int src_len)
 244 {
 245         unsigned int i, j, transactions, dst_len = 0;
 246         u32 sample[3];
 247
 248         /* There could be 1-3 1024 byte transactions per packet */
 249         transactions = src_len / 1024;
 250
 251         for (i = 0; i < transactions; i++) {
 252                 sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
 253                                 src[0] << 0;
 254                 if (i == 0 && dev->next_sample != sample[0]) {
 255                         dev_dbg_ratelimited(dev->dev,
 256                                             "%d samples lost, %d %08x:%08x\n",
 257                                             sample[0] - dev->next_sample,
 258                                             src_len, dev->next_sample,
 259                                             sample[0]);
 260                 }
 261
 262                 /*
 263                  * Dump all unknown 'garbage' data - maybe we will discover
 264                  * someday if there is something rational...
 265                  */
 266                 dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
 267
 268                 src += 16; /* skip header */
 269
 270                 switch (dev->pixelformat) {
 271                 case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
 272                 {
 273                         s8 *s8src = (s8 *)src;
 274                         u8 *u8dst = (u8 *)dst;
 275
 276                         for (j = 0; j < 1008; j++)
 277                                 *u8dst++ = *s8src++ + 128;
 278
 279                         src += 1008;
 280                         dst += 1008;
 281                         dst_len += 1008;
 282                         dev->next_sample = sample[i] + 504;
 283                         break;
 284                 }
 285                 case  V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
 286                 {
 287                         s16 *s16src = (s16 *)src;
 288                         u16 *u16dst = (u16 *)dst;
 289                         struct {signed int x:14; } se; /* sign extension */
 290                         unsigned int utmp;
 291
 292                         for (j = 0; j < 1008; j += 2) {
 293                                 /* sign extension from 14-bit to signed int */
 294                                 se.x = *s16src++;
 295                                 /* from signed int to unsigned int */
 296                                 utmp = se.x + 8192;
 297                                 /* from 14-bit to 16-bit */
 298                                 *u16dst++ = utmp << 2 | utmp >> 12;
 299                         }
 300
 301                         src += 1008;
 302                         dst += 1008;
 303                         dst_len += 1008;
 304                         dev->next_sample = sample[i] + 252;
 305                         break;
 306                 }
 307                 case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
 308                         /* Dump unknown 'garbage' data */
 309                         dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
 310                         memcpy(dst, src, 984);
 311                         src += 984 + 24;
 312                         dst += 984;
 313                         dst_len += 984;
 314                         dev->next_sample = sample[i] + 384;
 315                         break;
 316                 case V4L2_SDR_FMT_CS8:         /* 504 x IQ samples */
 317                         memcpy(dst, src, 1008);
 318                         src += 1008;
 319                         dst += 1008;
 320                         dst_len += 1008;
 321                         dev->next_sample = sample[i] + 504;
 322                         break;
 323                 case MSI2500_PIX_FMT_SDR_S12:  /* 336 x IQ samples */
 324                         memcpy(dst, src, 1008);
 325                         src += 1008;
 326                         dst += 1008;
 327                         dst_len += 1008;
 328                         dev->next_sample = sample[i] + 336;
 329                         break;
 330                 case V4L2_SDR_FMT_CS14LE:      /* 252 x IQ samples */
 331                         memcpy(dst, src, 1008);
 332                         src += 1008;
 333                         dst += 1008;
 334                         dst_len += 1008;
 335                         dev->next_sample = sample[i] + 252;
 336                         break;
 337                 default:
 338                         break;
 339                 }
 340         }
 341
 342         /* calculate sample rate and output it in 10 seconds intervals */
 343         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 344                 #define MSECS 10000UL
 345                 unsigned int msecs = jiffies_to_msecs(jiffies -
 346                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 347                 unsigned int samples = dev->next_sample - dev->sample;
 348
 349                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 350                 dev->sample = dev->next_sample;
 351                 dev_dbg(dev->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
 352                         src_len, samples, msecs,
 353                         samples * 1000UL / msecs);
 354         }
 355
 356         return dst_len;
 357 }
 358
 359 /*
 360  * This gets called for the Isochronous pipe (stream). This is done in interrupt
 361  * time, so it has to be fast, not crash, and not stall. Neat.
 362  */
 363 static void msi2500_isoc_handler(struct urb *urb)
 364 {
 365         struct msi2500_dev *dev = (struct msi2500_dev *)urb->context;
 366         int i, flen, fstatus;
 367         unsigned char *iso_buf = NULL;
 368         struct msi2500_frame_buf *fbuf;
 369
 370         if (unlikely(urb->status == -ENOENT ||
 371                      urb->status == -ECONNRESET ||
 372                      urb->status == -ESHUTDOWN)) {
 373                 dev_dbg(dev->dev, "URB (%p) unlinked %ssynchronously\n",
 374                         urb, urb->status == -ENOENT ? "" : "a");
 375                 return;
 376         }
 377
 378         if (unlikely(urb->status != 0)) {
 379                 dev_dbg(dev->dev, "called with status %d\n", urb->status);
 380                 /* Give up after a number of contiguous errors */
 381                 if (++dev->isoc_errors > MAX_ISOC_ERRORS)
 382                         dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
 383                 goto handler_end;
 384         } else {
 385                 /* Reset ISOC error counter. We did get here, after all. */
 386                 dev->isoc_errors = 0;
 387         }
 388
 389         /* Compact data */
 390         for (i = 0; i < urb->number_of_packets; i++) {
 391                 void *ptr;
 392
 393                 /* Check frame error */
 394                 fstatus = urb->iso_frame_desc[i].status;
 395                 if (unlikely(fstatus)) {
 396                         dev_dbg_ratelimited(dev->dev,
 397                                             "frame=%d/%d has error %d skipping\n",
 398                                             i, urb->number_of_packets, fstatus);
 399                         continue;
 400                 }
 401
 402                 /* Check if that frame contains data */
 403                 flen = urb->iso_frame_desc[i].actual_length;
 404                 if (unlikely(flen == 0))
 405                         continue;
 406
 407                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 408
 409                 /* Get free framebuffer */
 410                 fbuf = msi2500_get_next_fill_buf(dev);
 411                 if (unlikely(fbuf == NULL)) {
 412                         dev->vb_full++;
 413                         dev_dbg_ratelimited(dev->dev,
 414                                             "video buffer is full, %d packets dropped\n",
 415                                             dev->vb_full);
 416                         continue;
 417                 }
 418
 419                 /* fill framebuffer */
 420                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 421                 flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
 422                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
 423                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 424         }
 425
 426 handler_end:
 427         i = usb_submit_urb(urb, GFP_ATOMIC);
 428         if (unlikely(i != 0))
 429                 dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
 430 }
 431
 432 static void msi2500_iso_stop(struct msi2500_dev *dev)
 433 {
 434         int i;
 435
 436         dev_dbg(dev->dev, "\n");
 437
 438         /* Unlinking ISOC buffers one by one */
 439         for (i = 0; i < MAX_ISO_BUFS; i++) {
 440                 if (dev->urbs[i]) {
 441                         dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
 442                         usb_kill_urb(dev->urbs[i]);
 443                 }
 444         }
 445 }
 446
 447 static void msi2500_iso_free(struct msi2500_dev *dev)
 448 {
 449         int i;
 450
 451         dev_dbg(dev->dev, "\n");
 452
 453         /* Freeing ISOC buffers one by one */
 454         for (i = 0; i < MAX_ISO_BUFS; i++) {
 455                 if (dev->urbs[i]) {
 456                         dev_dbg(dev->dev, "Freeing URB\n");
 457                         if (dev->urbs[i]->transfer_buffer) {
 458                                 usb_free_coherent(dev->udev,
 459                                         dev->urbs[i]->transfer_buffer_length,
 460                                         dev->urbs[i]->transfer_buffer,
 461                                         dev->urbs[i]->transfer_dma);
 462                         }
 463                         usb_free_urb(dev->urbs[i]);
 464                         dev->urbs[i] = NULL;
 465                 }
 466         }
 467 }
 468
 469 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 470 static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
 471 {
 472         dev_dbg(dev->dev, "\n");
 473
 474         msi2500_iso_stop(dev);
 475         msi2500_iso_free(dev);
 476 }
 477
 478 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 479 static int msi2500_isoc_init(struct msi2500_dev *dev)
 480 {
 481         struct urb *urb;
 482         int i, j, ret;
 483
 484         dev_dbg(dev->dev, "\n");
 485
 486         dev->isoc_errors = 0;
 487
 488         ret = usb_set_interface(dev->udev, 0, 1);
 489         if (ret)
 490                 return ret;
 491
 492         /* Allocate and init Isochronuous urbs */
 493         for (i = 0; i < MAX_ISO_BUFS; i++) {
 494                 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 495                 if (urb == NULL) {
 496                         msi2500_isoc_cleanup(dev);
 497                         return -ENOMEM;
 498                 }
 499                 dev->urbs[i] = urb;
 500                 dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
 501
 502                 urb->interval = 1;
 503                 urb->dev = dev->udev;
 504                 urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
 505                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 506                 urb->transfer_buffer = usb_alloc_coherent(dev->udev,
 507                                 ISO_BUFFER_SIZE,
 508                                 GFP_KERNEL, &urb->transfer_dma);
 509                 if (urb->transfer_buffer == NULL) {
 510                         dev_err(dev->dev,
 511                                 "Failed to allocate urb buffer %d\n", i);
 512                         msi2500_isoc_cleanup(dev);
 513                         return -ENOMEM;
 514                 }
 515                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 516                 urb->complete = msi2500_isoc_handler;
 517                 urb->context = dev;
 518                 urb->start_frame = 0;
 519                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 520                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 521                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 522                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 523                 }
 524         }
 525
 526         /* link */
 527         for (i = 0; i < MAX_ISO_BUFS; i++) {
 528                 ret = usb_submit_urb(dev->urbs[i], GFP_KERNEL);
 529                 if (ret) {
 530                         dev_err(dev->dev,
 531                                 "usb_submit_urb %d failed with error %d\n",
 532                                 i, ret);
 533                         msi2500_isoc_cleanup(dev);
 534                         return ret;
 535                 }
 536                 dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
 537         }
 538
 539         /* All is done... */
 540         return 0;
 541 }
 542
 543 /* Must be called with vb_queue_lock hold */
 544 static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
 545 {
 546         unsigned long flags;
 547
 548         dev_dbg(dev->dev, "\n");
 549
 550         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 551         while (!list_empty(&dev->queued_bufs)) {
 552                 struct msi2500_frame_buf *buf;
 553
 554                 buf = list_entry(dev->queued_bufs.next,
 555                                  struct msi2500_frame_buf, list);
 556                 list_del(&buf->list);
 557                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 558         }
 559         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 560 }
 561
 562 /* The user yanked out the cable... */
 563 static void msi2500_disconnect(struct usb_interface *intf)
 564 {
 565         struct v4l2_device *v = usb_get_intfdata(intf);
 566         struct msi2500_dev *dev =
 567                         container_of(v, struct msi2500_dev, v4l2_dev);
 568
 569         dev_dbg(dev->dev, "\n");
 570
 571         mutex_lock(&dev->vb_queue_lock);
 572         mutex_lock(&dev->v4l2_lock);
 573         /* No need to keep the urbs around after disconnection */
 574         dev->udev = NULL;
 575         v4l2_device_disconnect(&dev->v4l2_dev);
 576         video_unregister_device(&dev->vdev);
 577         spi_unregister_controller(dev->ctlr);
 578         mutex_unlock(&dev->v4l2_lock);
 579         mutex_unlock(&dev->vb_queue_lock);
 580
 581         v4l2_device_put(&dev->v4l2_dev);
 582 }
 583
 584 static int msi2500_querycap(struct file *file, void *fh,
 585                             struct v4l2_capability *cap)
 586 {
 587         struct msi2500_dev *dev = video_drvdata(file);
 588
 589         dev_dbg(dev->dev, "\n");
 590
 591         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 592         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 593         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 594         return 0;
 595 }
 596
 597 /* Videobuf2 operations */
 598 static int msi2500_queue_setup(struct vb2_queue *vq,
 599                                unsigned int *nbuffers,
 600                                unsigned int *nplanes, unsigned int sizes[],
 601                                struct device *alloc_devs[])
 602 {
 603         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 604
 605         dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
 606
 607         /* Absolute min and max number of buffers available for mmap() */
 608         *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
 609         *nplanes = 1;
 610         sizes[0] = PAGE_ALIGN(dev->buffersize);
 611         dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 612         return 0;
 613 }
 614
 615 static void msi2500_buf_queue(struct vb2_buffer *vb)
 616 {
 617         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 618         struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 619         struct msi2500_frame_buf *buf = container_of(vbuf,
 620                                                      struct msi2500_frame_buf,
 621                                                      vb);
 622         unsigned long flags;
 623
 624         /* Check the device has not disconnected between prep and queuing */
 625         if (unlikely(!dev->udev)) {
 626                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 627                 return;
 628         }
 629
 630         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 631         list_add_tail(&buf->list, &dev->queued_bufs);
 632         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 633 }
 634
 635 #define CMD_WREG               0x41
 636 #define CMD_START_STREAMING    0x43
 637 #define CMD_STOP_STREAMING     0x45
 638 #define CMD_READ_UNKNOWN       0x48
 639
 640 #define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
 641         char *_direction; \
 642         if (_t & USB_DIR_IN) \
 643                 _direction = "<<<"; \
 644         else \
 645                 _direction = ">>>"; \
 646         dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
 647                         _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
 648                         _l & 0xff, _l >> 8, _direction, _l, _b); \
 649 }
 650
 651 static int msi2500_ctrl_msg(struct msi2500_dev *dev, u8 cmd, u32 data)
 652 {
 653         int ret;
 654         u8 request = cmd;
 655         u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
 656         u16 value = (data >> 0) & 0xffff;
 657         u16 index = (data >> 16) & 0xffff;
 658
 659         msi2500_dbg_usb_control_msg(dev->dev, request, requesttype,
 660                                     value, index, NULL, 0);
 661         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
 662                               requesttype, value, index, NULL, 0, 2000);
 663         if (ret)
 664                 dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
 665                         ret, cmd, data);
 666
 667         return ret;
 668 }
 669
 670 static int msi2500_set_usb_adc(struct msi2500_dev *dev)
 671 {
 672         int ret;
 673         unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
 674         u32 reg3, reg4, reg7;
 675         struct v4l2_ctrl *bandwidth_auto;
 676         struct v4l2_ctrl *bandwidth;
 677
 678         f_sr = dev->f_adc;
 679
 680         /* set tuner, subdev, filters according to sampling rate */
 681         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 682                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 683         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 684                 bandwidth = v4l2_ctrl_find(&dev->hdl,
 685                                 V4L2_CID_RF_TUNER_BANDWIDTH);
 686                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 687         }
 688
 689         /* select stream format */
 690         switch (dev->pixelformat) {
 691         case V4L2_SDR_FMT_CU8:
 692                 reg7 = 0x000c9407; /* 504 */
 693                 break;
 694         case  V4L2_SDR_FMT_CU16LE:
 695                 reg7 = 0x00009407; /* 252 */
 696                 break;
 697         case V4L2_SDR_FMT_CS8:
 698                 reg7 = 0x000c9407; /* 504 */
 699                 break;
 700         case MSI2500_PIX_FMT_SDR_MSI2500_384:
 701                 reg7 = 0x0000a507; /* 384 */
 702                 break;
 703         case MSI2500_PIX_FMT_SDR_S12:
 704                 reg7 = 0x00008507; /* 336 */
 705                 break;
 706         case V4L2_SDR_FMT_CS14LE:
 707                 reg7 = 0x00009407; /* 252 */
 708                 break;
 709         default:
 710                 reg7 = 0x000c9407; /* 504 */
 711                 break;
 712         }
 713
 714         /*
 715          * Fractional-N synthesizer
 716          *
 717          *           +----------------------------------------+
 718          *           v                                        |
 719          *  Fref   +----+     +-------+     +-----+         +------+     +---+
 720          * ------> | PD | --> |  VCO  | --> | /2  | ------> | /N.F | <-- | K |
 721          *         +----+     +-------+     +-----+         +------+     +---+
 722          *                      |
 723          *                      |
 724          *                      v
 725          *                    +-------+     +-----+  Fout
 726          *                    | /Rout | --> | /12 | ------>
 727          *                    +-------+     +-----+
 728          */
 729         /*
 730          * Synthesizer config is just a educated guess...
 731          *
 732          * [7:0]   0x03, register address
 733          * [8]     1, power control
 734          * [9]     ?, power control
 735          * [12:10] output divider
 736          * [13]    0 ?
 737          * [14]    0 ?
 738          * [15]    fractional MSB, bit 20
 739          * [16:19] N
 740          * [23:20] ?
 741          * [24:31] 0x01
 742          *
 743          * output divider
 744          * val   div
 745          *   0     - (invalid)
 746          *   1     4
 747          *   2     6
 748          *   3     8
 749          *   4    10
 750          *   5    12
 751          *   6    14
 752          *   7    16
 753          *
 754          * VCO 202000000 - 720000000++
 755          */
 756
 757         #define F_REF 24000000
 758         #define DIV_PRE_N 2
 759         #define DIV_LO_OUT 12
 760         reg3 = 0x01000303;
 761         reg4 = 0x00000004;
 762
 763         /* XXX: Filters? AGC? VCO band? */
 764         if (f_sr < 6000000)
 765                 reg3 |= 0x1 << 20;
 766         else if (f_sr < 7000000)
 767                 reg3 |= 0x5 << 20;
 768         else if (f_sr < 8500000)
 769                 reg3 |= 0x9 << 20;
 770         else
 771                 reg3 |= 0xd << 20;
 772
 773         for (div_out = 4; div_out < 16; div_out += 2) {
 774                 f_vco = f_sr * div_out * DIV_LO_OUT;
 775                 dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
 776                 if (f_vco >= 202000000)
 777                         break;
 778         }
 779
 780         /* Calculate PLL integer and fractional control word. */
 781         div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
 782         k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
 783
 784         reg3 |= div_n << 16;
 785         reg3 |= (div_out / 2 - 1) << 10;
 786         reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
 787         reg4 |= ((k_cw >>  0) & 0x0fffff) <<  8; /* [19:0] */
 788
 789         dev_dbg(dev->dev,
 790                 "f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
 791                 f_sr, f_vco, div_n, k, div_out, reg3, reg4);
 792
 793         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
 794         if (ret)
 795                 goto err;
 796
 797         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
 798         if (ret)
 799                 goto err;
 800
 801         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
 802         if (ret)
 803                 goto err;
 804
 805         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
 806         if (ret)
 807                 goto err;
 808
 809         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
 810         if (ret)
 811                 goto err;
 812
 813         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
 814         if (ret)
 815                 goto err;
 816
 817         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
 818         if (ret)
 819                 goto err;
 820
 821         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
 822 err:
 823         return ret;
 824 }
 825
 826 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
 827 {
 828         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 829         int ret;
 830
 831         dev_dbg(dev->dev, "\n");
 832
 833         if (!dev->udev)
 834                 return -ENODEV;
 835
 836         if (mutex_lock_interruptible(&dev->v4l2_lock))
 837                 return -ERESTARTSYS;
 838
 839         /* wake-up tuner */
 840         v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 841
 842         ret = msi2500_set_usb_adc(dev);
 843
 844         ret = msi2500_isoc_init(dev);
 845         if (ret)
 846                 msi2500_cleanup_queued_bufs(dev);
 847
 848         ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
 849
 850         mutex_unlock(&dev->v4l2_lock);
 851
 852         return ret;
 853 }
 854
 855 static void msi2500_stop_streaming(struct vb2_queue *vq)
 856 {
 857         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 858
 859         dev_dbg(dev->dev, "\n");
 860
 861         mutex_lock(&dev->v4l2_lock);
 862
 863         if (dev->udev)
 864                 msi2500_isoc_cleanup(dev);
 865
 866         msi2500_cleanup_queued_bufs(dev);
 867
 868         /* according to tests, at least 700us delay is required  */
 869         msleep(20);
 870         if (dev->udev && !msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
 871                 /* sleep USB IF / ADC */
 872                 msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
 873         }
 874
 875         /* sleep tuner */
 876         v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 877
 878         mutex_unlock(&dev->v4l2_lock);
 879 }
 880
 881 static const struct vb2_ops msi2500_vb2_ops = {
 882         .queue_setup            = msi2500_queue_setup,
 883         .buf_queue              = msi2500_buf_queue,
 884         .start_streaming        = msi2500_start_streaming,
 885         .stop_streaming         = msi2500_stop_streaming,
 886         .wait_prepare           = vb2_ops_wait_prepare,
 887         .wait_finish            = vb2_ops_wait_finish,
 888 };
 889
 890 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
 891                                     struct v4l2_fmtdesc *f)
 892 {
 893         struct msi2500_dev *dev = video_drvdata(file);
 894
 895         dev_dbg(dev->dev, "index=%d\n", f->index);
 896
 897         if (f->index >= dev->num_formats)
 898                 return -EINVAL;
 899
 900         f->pixelformat = formats[f->index].pixelformat;
 901
 902         return 0;
 903 }
 904
 905 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
 906                                  struct v4l2_format *f)
 907 {
 908         struct msi2500_dev *dev = video_drvdata(file);
 909
 910         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 911                 (char *)&dev->pixelformat);
 912
 913         f->fmt.sdr.pixelformat = dev->pixelformat;
 914         f->fmt.sdr.buffersize = dev->buffersize;
 915
 916         return 0;
 917 }
 918
 919 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
 920                                  struct v4l2_format *f)
 921 {
 922         struct msi2500_dev *dev = video_drvdata(file);
 923         struct vb2_queue *q = &dev->vb_queue;
 924         int i;
 925
 926         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 927                 (char *)&f->fmt.sdr.pixelformat);
 928
 929         if (vb2_is_busy(q))
 930                 return -EBUSY;
 931
 932         for (i = 0; i < dev->num_formats; i++) {
 933                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 934                         dev->pixelformat = formats[i].pixelformat;
 935                         dev->buffersize = formats[i].buffersize;
 936                         f->fmt.sdr.buffersize = formats[i].buffersize;
 937                         return 0;
 938                 }
 939         }
 940
 941         dev->pixelformat = formats[0].pixelformat;
 942         dev->buffersize = formats[0].buffersize;
 943         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 944         f->fmt.sdr.buffersize = formats[0].buffersize;
 945
 946         return 0;
 947 }
 948
 949 static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
 950                                    struct v4l2_format *f)
 951 {
 952         struct msi2500_dev *dev = video_drvdata(file);
 953         int i;
 954
 955         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 956                 (char *)&f->fmt.sdr.pixelformat);
 957
 958         for (i = 0; i < dev->num_formats; i++) {
 959                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 960                         f->fmt.sdr.buffersize = formats[i].buffersize;
 961                         return 0;
 962                 }
 963         }
 964
 965         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 966         f->fmt.sdr.buffersize = formats[0].buffersize;
 967
 968         return 0;
 969 }
 970
 971 static int msi2500_s_tuner(struct file *file, void *priv,
 972                            const struct v4l2_tuner *v)
 973 {
 974         struct msi2500_dev *dev = video_drvdata(file);
 975         int ret;
 976
 977         dev_dbg(dev->dev, "index=%d\n", v->index);
 978
 979         if (v->index == 0)
 980                 ret = 0;
 981         else if (v->index == 1)
 982                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 983         else
 984                 ret = -EINVAL;
 985
 986         return ret;
 987 }
 988
 989 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
 990 {
 991         struct msi2500_dev *dev = video_drvdata(file);
 992         int ret;
 993
 994         dev_dbg(dev->dev, "index=%d\n", v->index);
 995
 996         if (v->index == 0) {
 997                 strscpy(v->name, "Mirics MSi2500", sizeof(v->name));
 998                 v->type = V4L2_TUNER_ADC;
 999                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1000                 v->rangelow =   1200000;
1001                 v->rangehigh = 15000000;
1002                 ret = 0;
1003         } else if (v->index == 1) {
1004                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1005         } else {
1006                 ret = -EINVAL;
1007         }
1008
1009         return ret;
1010 }
1011
1012 static int msi2500_g_frequency(struct file *file, void *priv,
1013                                struct v4l2_frequency *f)
1014 {
1015         struct msi2500_dev *dev = video_drvdata(file);
1016         int ret  = 0;
1017
1018         dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1019
1020         if (f->tuner == 0) {
1021                 f->frequency = dev->f_adc;
1022                 ret = 0;
1023         } else if (f->tuner == 1) {
1024                 f->type = V4L2_TUNER_RF;
1025                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1026         } else {
1027                 ret = -EINVAL;
1028         }
1029
1030         return ret;
1031 }
1032
1033 static int msi2500_s_frequency(struct file *file, void *priv,
1034                                const struct v4l2_frequency *f)
1035 {
1036         struct msi2500_dev *dev = video_drvdata(file);
1037         int ret;
1038
1039         dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
1040                 f->tuner, f->type, f->frequency);
1041
1042         if (f->tuner == 0) {
1043                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1044                                      bands[0].rangelow,
1045                                      bands[0].rangehigh);
1046                 dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1047                 ret = msi2500_set_usb_adc(dev);
1048         } else if (f->tuner == 1) {
1049                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1050         } else {
1051                 ret = -EINVAL;
1052         }
1053
1054         return ret;
1055 }
1056
1057 static int msi2500_enum_freq_bands(struct file *file, void *priv,
1058                                    struct v4l2_frequency_band *band)
1059 {
1060         struct msi2500_dev *dev = video_drvdata(file);
1061         int ret;
1062
1063         dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
1064                 band->tuner, band->type, band->index);
1065
1066         if (band->tuner == 0) {
1067                 if (band->index >= ARRAY_SIZE(bands)) {
1068                         ret = -EINVAL;
1069                 } else {
1070                         *band = bands[band->index];
1071                         ret = 0;
1072                 }
1073         } else if (band->tuner == 1) {
1074                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner,
1075                                        enum_freq_bands, band);
1076         } else {
1077                 ret = -EINVAL;
1078         }
1079
1080         return ret;
1081 }
1082
1083 static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1084         .vidioc_querycap          = msi2500_querycap,
1085
1086         .vidioc_enum_fmt_sdr_cap  = msi2500_enum_fmt_sdr_cap,
1087         .vidioc_g_fmt_sdr_cap     = msi2500_g_fmt_sdr_cap,
1088         .vidioc_s_fmt_sdr_cap     = msi2500_s_fmt_sdr_cap,
1089         .vidioc_try_fmt_sdr_cap   = msi2500_try_fmt_sdr_cap,
1090
1091         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1092         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1093         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1094         .vidioc_querybuf          = vb2_ioctl_querybuf,
1095         .vidioc_qbuf              = vb2_ioctl_qbuf,
1096         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1097
1098         .vidioc_streamon          = vb2_ioctl_streamon,
1099         .vidioc_streamoff         = vb2_ioctl_streamoff,
1100
1101         .vidioc_g_tuner           = msi2500_g_tuner,
1102         .vidioc_s_tuner           = msi2500_s_tuner,
1103
1104         .vidioc_g_frequency       = msi2500_g_frequency,
1105         .vidioc_s_frequency       = msi2500_s_frequency,
1106         .vidioc_enum_freq_bands   = msi2500_enum_freq_bands,
1107
1108         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1109         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1110         .vidioc_log_status        = v4l2_ctrl_log_status,
1111 };
1112
1113 static const struct v4l2_file_operations msi2500_fops = {
1114         .owner                    = THIS_MODULE,
1115         .open                     = v4l2_fh_open,
1116         .release                  = vb2_fop_release,
1117         .read                     = vb2_fop_read,
1118         .poll                     = vb2_fop_poll,
1119         .mmap                     = vb2_fop_mmap,
1120         .unlocked_ioctl           = video_ioctl2,
1121 };
1122
1123 static const struct video_device msi2500_template = {
1124         .name                     = "Mirics MSi3101 SDR Dongle",
1125         .release                  = video_device_release_empty,
1126         .fops                     = &msi2500_fops,
1127         .ioctl_ops                = &msi2500_ioctl_ops,
1128 };
1129
1130 static void msi2500_video_release(struct v4l2_device *v)
1131 {
1132         struct msi2500_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
1133
1134         v4l2_ctrl_handler_free(&dev->hdl);
1135         v4l2_device_unregister(&dev->v4l2_dev);
1136         kfree(dev);
1137 }
1138
1139 static int msi2500_transfer_one_message(struct spi_controller *ctlr,
1140                                         struct spi_message *m)
1141 {
1142         struct msi2500_dev *dev = spi_controller_get_devdata(ctlr);
1143         struct spi_transfer *t;
1144         int ret = 0;
1145         u32 data;
1146
1147         list_for_each_entry(t, &m->transfers, transfer_list) {
1148                 dev_dbg(dev->dev, "msg=%*ph\n", t->len, t->tx_buf);
1149                 data = 0x09; /* reg 9 is SPI adapter */
1150                 data |= ((u8 *)t->tx_buf)[0] << 8;
1151                 data |= ((u8 *)t->tx_buf)[1] << 16;
1152                 data |= ((u8 *)t->tx_buf)[2] << 24;
1153                 ret = msi2500_ctrl_msg(dev, CMD_WREG, data);
1154         }
1155
1156         m->status = ret;
1157         spi_finalize_current_message(ctlr);
1158         return ret;
1159 }
1160
1161 static int msi2500_probe(struct usb_interface *intf,
1162                          const struct usb_device_id *id)
1163 {
1164         struct msi2500_dev *dev;
1165         struct v4l2_subdev *sd;
1166         struct spi_controller *ctlr;
1167         int ret;
1168         static struct spi_board_info board_info = {
1169                 .modalias               = "msi001",
1170                 .bus_num                = 0,
1171                 .chip_select            = 0,
1172                 .max_speed_hz           = 12000000,
1173         };
1174
1175         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1176         if (!dev) {
1177                 ret = -ENOMEM;
1178                 goto err;
1179         }
1180
1181         mutex_init(&dev->v4l2_lock);
1182         mutex_init(&dev->vb_queue_lock);
1183         spin_lock_init(&dev->queued_bufs_lock);
1184         INIT_LIST_HEAD(&dev->queued_bufs);
1185         dev->dev = &intf->dev;
1186         dev->udev = interface_to_usbdev(intf);
1187         dev->f_adc = bands[0].rangelow;
1188         dev->pixelformat = formats[0].pixelformat;
1189         dev->buffersize = formats[0].buffersize;
1190         dev->num_formats = NUM_FORMATS;
1191         if (!msi2500_emulated_fmt)
1192                 dev->num_formats -= 2;
1193
1194         /* Init videobuf2 queue structure */
1195         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1196         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1197         dev->vb_queue.drv_priv = dev;
1198         dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1199         dev->vb_queue.ops = &msi2500_vb2_ops;
1200         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1201         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1202         ret = vb2_queue_init(&dev->vb_queue);
1203         if (ret) {
1204                 dev_err(dev->dev, "Could not initialize vb2 queue\n");
1205                 goto err_free_mem;
1206         }
1207
1208         /* Init video_device structure */
1209         dev->vdev = msi2500_template;
1210         dev->vdev.queue = &dev->vb_queue;
1211         dev->vdev.queue->lock = &dev->vb_queue_lock;
1212         video_set_drvdata(&dev->vdev, dev);
1213
1214         /* Register the v4l2_device structure */
1215         dev->v4l2_dev.release = msi2500_video_release;
1216         ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1217         if (ret) {
1218                 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
1219                 goto err_free_mem;
1220         }
1221
1222         /* SPI master adapter */
1223         ctlr = spi_alloc_master(dev->dev, 0);
1224         if (ctlr == NULL) {
1225                 ret = -ENOMEM;
1226                 goto err_unregister_v4l2_dev;
1227         }
1228
1229         dev->ctlr = ctlr;
1230         ctlr->bus_num = -1;
1231         ctlr->num_chipselect = 1;
1232         ctlr->transfer_one_message = msi2500_transfer_one_message;
1233         spi_controller_set_devdata(ctlr, dev);
1234         ret = spi_register_controller(ctlr);
1235         if (ret) {
1236                 spi_controller_put(ctlr);
1237                 goto err_unregister_v4l2_dev;
1238         }
1239
1240         /* load v4l2 subdevice */
1241         sd = v4l2_spi_new_subdev(&dev->v4l2_dev, ctlr, &board_info);
1242         dev->v4l2_subdev = sd;
1243         if (sd == NULL) {
1244                 dev_err(dev->dev, "cannot get v4l2 subdevice\n");
1245                 ret = -ENODEV;
1246                 goto err_unregister_controller;
1247         }
1248
1249         /* Register controls */
1250         v4l2_ctrl_handler_init(&dev->hdl, 0);
1251         if (dev->hdl.error) {
1252                 ret = dev->hdl.error;
1253                 dev_err(dev->dev, "Could not initialize controls\n");
1254                 goto err_free_controls;
1255         }
1256
1257         /* currently all controls are from subdev */
1258         v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL, true);
1259
1260         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1261         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1262         dev->vdev.lock = &dev->v4l2_lock;
1263         dev->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1264                                 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
1265
1266         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1267         if (ret) {
1268                 dev_err(dev->dev,
1269                         "Failed to register as video device (%d)\n", ret);
1270                 goto err_unregister_v4l2_dev;
1271         }
1272         dev_info(dev->dev, "Registered as %s\n",
1273                  video_device_node_name(&dev->vdev));
1274         dev_notice(dev->dev,
1275                    "SDR API is still slightly experimental and functionality changes may follow\n");
1276         return 0;
1277 err_free_controls:
1278         v4l2_ctrl_handler_free(&dev->hdl);
1279 err_unregister_controller:
1280         spi_unregister_controller(dev->ctlr);
1281 err_unregister_v4l2_dev:
1282         v4l2_device_unregister(&dev->v4l2_dev);
1283 err_free_mem:
1284         kfree(dev);
1285 err:
1286         return ret;
1287 }
1288
1289 /* USB device ID list */
1290 static const struct usb_device_id msi2500_id_table[] = {
1291         {USB_DEVICE(0x1df7, 0x2500)}, /* Mirics MSi3101 SDR Dongle */
1292         {USB_DEVICE(0x2040, 0xd300)}, /* Hauppauge WinTV 133559 LF */
1293         {}
1294 };
1295 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1296
1297 /* USB subsystem interface */
1298 static struct usb_driver msi2500_driver = {
1299         .name                     = KBUILD_MODNAME,
1300         .probe                    = msi2500_probe,
1301         .disconnect               = msi2500_disconnect,
1302         .id_table                 = msi2500_id_table,
1303 };
1304
1305 module_usb_driver(msi2500_driver);
1306
1307 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1308 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1309 MODULE_LICENSE("GPL");