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         char    *name;
  70         u32     pixelformat;
  71         u32     buffersize;
  72 };
  73
  74 /* format descriptions for capture and preview */
  75 static struct msi2500_format formats[] = {
  76         {
  77                 .name           = "Complex S8",
  78                 .pixelformat    = V4L2_SDR_FMT_CS8,
  79                 .buffersize     = 3 * 1008,
  80 #if 0
  81         }, {
  82                 .name           = "10+2-bit signed",
  83                 .pixelformat    = MSI2500_PIX_FMT_SDR_MSI2500_384,
  84         }, {
  85                 .name           = "12-bit signed",
  86                 .pixelformat    = MSI2500_PIX_FMT_SDR_S12,
  87 #endif
  88         }, {
  89                 .name           = "Complex S14LE",
  90                 .pixelformat    = V4L2_SDR_FMT_CS14LE,
  91                 .buffersize     = 3 * 1008,
  92         }, {
  93                 .name           = "Complex U8 (emulated)",
  94                 .pixelformat    = V4L2_SDR_FMT_CU8,
  95                 .buffersize     = 3 * 1008,
  96         }, {
  97                 .name           = "Complex U16LE (emulated)",
  98                 .pixelformat    =  V4L2_SDR_FMT_CU16LE,
  99                 .buffersize     = 3 * 1008,
 100         },
 101 };
 102
 103 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
 104
 105 /* intermediate buffers with raw data from the USB device */
 106 struct msi2500_frame_buf {
 107         /* common v4l buffer stuff -- must be first */
 108         struct vb2_v4l2_buffer vb;
 109         struct list_head list;
 110 };
 111
 112 struct msi2500_dev {
 113         struct device *dev;
 114         struct video_device vdev;
 115         struct v4l2_device v4l2_dev;
 116         struct v4l2_subdev *v4l2_subdev;
 117         struct spi_master *master;
 118
 119         /* videobuf2 queue and queued buffers list */
 120         struct vb2_queue vb_queue;
 121         struct list_head queued_bufs;
 122         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 123
 124         /* Note if taking both locks v4l2_lock must always be locked first! */
 125         struct mutex v4l2_lock;      /* Protects everything else */
 126         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 127
 128         /* Pointer to our usb_device, will be NULL after unplug */
 129         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 130
 131         unsigned int f_adc;
 132         u32 pixelformat;
 133         u32 buffersize;
 134         unsigned int num_formats;
 135
 136         unsigned int isoc_errors; /* number of contiguous ISOC errors */
 137         unsigned int vb_full; /* vb is full and packets dropped */
 138
 139         struct urb *urbs[MAX_ISO_BUFS];
 140
 141         /* Controls */
 142         struct v4l2_ctrl_handler hdl;
 143
 144         u32 next_sample; /* for track lost packets */
 145         u32 sample; /* for sample rate calc */
 146         unsigned long jiffies_next;
 147 };
 148
 149 /* Private functions */
 150 static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
 151                                                         struct msi2500_dev *dev)
 152 {
 153         unsigned long flags;
 154         struct msi2500_frame_buf *buf = NULL;
 155
 156         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 157         if (list_empty(&dev->queued_bufs))
 158                 goto leave;
 159
 160         buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
 161         list_del(&buf->list);
 162 leave:
 163         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 164         return buf;
 165 }
 166
 167 /*
 168  * +===========================================================================
 169  * |   00-1023 | USB packet type '504'
 170  * +===========================================================================
 171  * |   00-  03 | sequence number of first sample in that USB packet
 172  * +---------------------------------------------------------------------------
 173  * |   04-  15 | garbage
 174  * +---------------------------------------------------------------------------
 175  * |   16-1023 | samples
 176  * +---------------------------------------------------------------------------
 177  * signed 8-bit sample
 178  * 504 * 2 = 1008 samples
 179  *
 180  *
 181  * +===========================================================================
 182  * |   00-1023 | USB packet type '384'
 183  * +===========================================================================
 184  * |   00-  03 | sequence number of first sample in that USB packet
 185  * +---------------------------------------------------------------------------
 186  * |   04-  15 | garbage
 187  * +---------------------------------------------------------------------------
 188  * |   16- 175 | samples
 189  * +---------------------------------------------------------------------------
 190  * |  176- 179 | control bits for previous samples
 191  * +---------------------------------------------------------------------------
 192  * |  180- 339 | samples
 193  * +---------------------------------------------------------------------------
 194  * |  340- 343 | control bits for previous samples
 195  * +---------------------------------------------------------------------------
 196  * |  344- 503 | samples
 197  * +---------------------------------------------------------------------------
 198  * |  504- 507 | control bits for previous samples
 199  * +---------------------------------------------------------------------------
 200  * |  508- 667 | samples
 201  * +---------------------------------------------------------------------------
 202  * |  668- 671 | control bits for previous samples
 203  * +---------------------------------------------------------------------------
 204  * |  672- 831 | samples
 205  * +---------------------------------------------------------------------------
 206  * |  832- 835 | control bits for previous samples
 207  * +---------------------------------------------------------------------------
 208  * |  836- 995 | samples
 209  * +---------------------------------------------------------------------------
 210  * |  996- 999 | control bits for previous samples
 211  * +---------------------------------------------------------------------------
 212  * | 1000-1023 | garbage
 213  * +---------------------------------------------------------------------------
 214  *
 215  * Bytes 4 - 7 could have some meaning?
 216  *
 217  * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
 218  * numbers. This results one 2-bit number for 8 samples. It is likely used for
 219  * for bit shifting sample by given bits, increasing actual sampling resolution.
 220  * Number 2 (0b10) was never seen.
 221  *
 222  * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
 223  *
 224  *
 225  * +===========================================================================
 226  * |   00-1023 | USB packet type '336'
 227  * +===========================================================================
 228  * |   00-  03 | sequence number of first sample in that USB packet
 229  * +---------------------------------------------------------------------------
 230  * |   04-  15 | garbage
 231  * +---------------------------------------------------------------------------
 232  * |   16-1023 | samples
 233  * +---------------------------------------------------------------------------
 234  * signed 12-bit sample
 235  *
 236  *
 237  * +===========================================================================
 238  * |   00-1023 | USB packet type '252'
 239  * +===========================================================================
 240  * |   00-  03 | sequence number of first sample in that USB packet
 241  * +---------------------------------------------------------------------------
 242  * |   04-  15 | garbage
 243  * +---------------------------------------------------------------------------
 244  * |   16-1023 | samples
 245  * +---------------------------------------------------------------------------
 246  * signed 14-bit sample
 247  */
 248
 249 static int msi2500_convert_stream(struct msi2500_dev *dev, u8 *dst, u8 *src,
 250                                   unsigned int src_len)
 251 {
 252         unsigned int i, j, transactions, dst_len = 0;
 253         u32 sample[3];
 254
 255         /* There could be 1-3 1024 byte transactions per packet */
 256         transactions = src_len / 1024;
 257
 258         for (i = 0; i < transactions; i++) {
 259                 sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
 260                                 src[0] << 0;
 261                 if (i == 0 && dev->next_sample != sample[0]) {
 262                         dev_dbg_ratelimited(dev->dev,
 263                                             "%d samples lost, %d %08x:%08x\n",
 264                                             sample[0] - dev->next_sample,
 265                                             src_len, dev->next_sample,
 266                                             sample[0]);
 267                 }
 268
 269                 /*
 270                  * Dump all unknown 'garbage' data - maybe we will discover
 271                  * someday if there is something rational...
 272                  */
 273                 dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
 274
 275                 src += 16; /* skip header */
 276
 277                 switch (dev->pixelformat) {
 278                 case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
 279                 {
 280                         s8 *s8src = (s8 *)src;
 281                         u8 *u8dst = (u8 *)dst;
 282
 283                         for (j = 0; j < 1008; j++)
 284                                 *u8dst++ = *s8src++ + 128;
 285
 286                         src += 1008;
 287                         dst += 1008;
 288                         dst_len += 1008;
 289                         dev->next_sample = sample[i] + 504;
 290                         break;
 291                 }
 292                 case  V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
 293                 {
 294                         s16 *s16src = (s16 *)src;
 295                         u16 *u16dst = (u16 *)dst;
 296                         struct {signed int x:14; } se; /* sign extension */
 297                         unsigned int utmp;
 298
 299                         for (j = 0; j < 1008; j += 2) {
 300                                 /* sign extension from 14-bit to signed int */
 301                                 se.x = *s16src++;
 302                                 /* from signed int to unsigned int */
 303                                 utmp = se.x + 8192;
 304                                 /* from 14-bit to 16-bit */
 305                                 *u16dst++ = utmp << 2 | utmp >> 12;
 306                         }
 307
 308                         src += 1008;
 309                         dst += 1008;
 310                         dst_len += 1008;
 311                         dev->next_sample = sample[i] + 252;
 312                         break;
 313                 }
 314                 case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
 315                         /* Dump unknown 'garbage' data */
 316                         dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
 317                         memcpy(dst, src, 984);
 318                         src += 984 + 24;
 319                         dst += 984;
 320                         dst_len += 984;
 321                         dev->next_sample = sample[i] + 384;
 322                         break;
 323                 case V4L2_SDR_FMT_CS8:         /* 504 x IQ samples */
 324                         memcpy(dst, src, 1008);
 325                         src += 1008;
 326                         dst += 1008;
 327                         dst_len += 1008;
 328                         dev->next_sample = sample[i] + 504;
 329                         break;
 330                 case MSI2500_PIX_FMT_SDR_S12:  /* 336 x IQ samples */
 331                         memcpy(dst, src, 1008);
 332                         src += 1008;
 333                         dst += 1008;
 334                         dst_len += 1008;
 335                         dev->next_sample = sample[i] + 336;
 336                         break;
 337                 case V4L2_SDR_FMT_CS14LE:      /* 252 x IQ samples */
 338                         memcpy(dst, src, 1008);
 339                         src += 1008;
 340                         dst += 1008;
 341                         dst_len += 1008;
 342                         dev->next_sample = sample[i] + 252;
 343                         break;
 344                 default:
 345                         break;
 346                 }
 347         }
 348
 349         /* calculate sample rate and output it in 10 seconds intervals */
 350         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 351                 #define MSECS 10000UL
 352                 unsigned int msecs = jiffies_to_msecs(jiffies -
 353                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 354                 unsigned int samples = dev->next_sample - dev->sample;
 355
 356                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 357                 dev->sample = dev->next_sample;
 358                 dev_dbg(dev->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
 359                         src_len, samples, msecs,
 360                         samples * 1000UL / msecs);
 361         }
 362
 363         return dst_len;
 364 }
 365
 366 /*
 367  * This gets called for the Isochronous pipe (stream). This is done in interrupt
 368  * time, so it has to be fast, not crash, and not stall. Neat.
 369  */
 370 static void msi2500_isoc_handler(struct urb *urb)
 371 {
 372         struct msi2500_dev *dev = (struct msi2500_dev *)urb->context;
 373         int i, flen, fstatus;
 374         unsigned char *iso_buf = NULL;
 375         struct msi2500_frame_buf *fbuf;
 376
 377         if (unlikely(urb->status == -ENOENT ||
 378                      urb->status == -ECONNRESET ||
 379                      urb->status == -ESHUTDOWN)) {
 380                 dev_dbg(dev->dev, "URB (%p) unlinked %ssynchronously\n",
 381                         urb, urb->status == -ENOENT ? "" : "a");
 382                 return;
 383         }
 384
 385         if (unlikely(urb->status != 0)) {
 386                 dev_dbg(dev->dev, "called with status %d\n", urb->status);
 387                 /* Give up after a number of contiguous errors */
 388                 if (++dev->isoc_errors > MAX_ISOC_ERRORS)
 389                         dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
 390                 goto handler_end;
 391         } else {
 392                 /* Reset ISOC error counter. We did get here, after all. */
 393                 dev->isoc_errors = 0;
 394         }
 395
 396         /* Compact data */
 397         for (i = 0; i < urb->number_of_packets; i++) {
 398                 void *ptr;
 399
 400                 /* Check frame error */
 401                 fstatus = urb->iso_frame_desc[i].status;
 402                 if (unlikely(fstatus)) {
 403                         dev_dbg_ratelimited(dev->dev,
 404                                             "frame=%d/%d has error %d skipping\n",
 405                                             i, urb->number_of_packets, fstatus);
 406                         continue;
 407                 }
 408
 409                 /* Check if that frame contains data */
 410                 flen = urb->iso_frame_desc[i].actual_length;
 411                 if (unlikely(flen == 0))
 412                         continue;
 413
 414                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 415
 416                 /* Get free framebuffer */
 417                 fbuf = msi2500_get_next_fill_buf(dev);
 418                 if (unlikely(fbuf == NULL)) {
 419                         dev->vb_full++;
 420                         dev_dbg_ratelimited(dev->dev,
 421                                             "videobuf is full, %d packets dropped\n",
 422                                             dev->vb_full);
 423                         continue;
 424                 }
 425
 426                 /* fill framebuffer */
 427                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 428                 flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
 429                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
 430                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 431         }
 432
 433 handler_end:
 434         i = usb_submit_urb(urb, GFP_ATOMIC);
 435         if (unlikely(i != 0))
 436                 dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
 437 }
 438
 439 static void msi2500_iso_stop(struct msi2500_dev *dev)
 440 {
 441         int i;
 442
 443         dev_dbg(dev->dev, "\n");
 444
 445         /* Unlinking ISOC buffers one by one */
 446         for (i = 0; i < MAX_ISO_BUFS; i++) {
 447                 if (dev->urbs[i]) {
 448                         dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
 449                         usb_kill_urb(dev->urbs[i]);
 450                 }
 451         }
 452 }
 453
 454 static void msi2500_iso_free(struct msi2500_dev *dev)
 455 {
 456         int i;
 457
 458         dev_dbg(dev->dev, "\n");
 459
 460         /* Freeing ISOC buffers one by one */
 461         for (i = 0; i < MAX_ISO_BUFS; i++) {
 462                 if (dev->urbs[i]) {
 463                         dev_dbg(dev->dev, "Freeing URB\n");
 464                         if (dev->urbs[i]->transfer_buffer) {
 465                                 usb_free_coherent(dev->udev,
 466                                         dev->urbs[i]->transfer_buffer_length,
 467                                         dev->urbs[i]->transfer_buffer,
 468                                         dev->urbs[i]->transfer_dma);
 469                         }
 470                         usb_free_urb(dev->urbs[i]);
 471                         dev->urbs[i] = NULL;
 472                 }
 473         }
 474 }
 475
 476 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 477 static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
 478 {
 479         dev_dbg(dev->dev, "\n");
 480
 481         msi2500_iso_stop(dev);
 482         msi2500_iso_free(dev);
 483 }
 484
 485 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 486 static int msi2500_isoc_init(struct msi2500_dev *dev)
 487 {
 488         struct urb *urb;
 489         int i, j, ret;
 490
 491         dev_dbg(dev->dev, "\n");
 492
 493         dev->isoc_errors = 0;
 494
 495         ret = usb_set_interface(dev->udev, 0, 1);
 496         if (ret)
 497                 return ret;
 498
 499         /* Allocate and init Isochronuous urbs */
 500         for (i = 0; i < MAX_ISO_BUFS; i++) {
 501                 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 502                 if (urb == NULL) {
 503                         msi2500_isoc_cleanup(dev);
 504                         return -ENOMEM;
 505                 }
 506                 dev->urbs[i] = urb;
 507                 dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
 508
 509                 urb->interval = 1;
 510                 urb->dev = dev->udev;
 511                 urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
 512                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 513                 urb->transfer_buffer = usb_alloc_coherent(dev->udev,
 514                                 ISO_BUFFER_SIZE,
 515                                 GFP_KERNEL, &urb->transfer_dma);
 516                 if (urb->transfer_buffer == NULL) {
 517                         dev_err(dev->dev,
 518                                 "Failed to allocate urb buffer %d\n", i);
 519                         msi2500_isoc_cleanup(dev);
 520                         return -ENOMEM;
 521                 }
 522                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 523                 urb->complete = msi2500_isoc_handler;
 524                 urb->context = dev;
 525                 urb->start_frame = 0;
 526                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 527                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 528                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 529                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 530                 }
 531         }
 532
 533         /* link */
 534         for (i = 0; i < MAX_ISO_BUFS; i++) {
 535                 ret = usb_submit_urb(dev->urbs[i], GFP_KERNEL);
 536                 if (ret) {
 537                         dev_err(dev->dev,
 538                                 "usb_submit_urb %d failed with error %d\n",
 539                                 i, ret);
 540                         msi2500_isoc_cleanup(dev);
 541                         return ret;
 542                 }
 543                 dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
 544         }
 545
 546         /* All is done... */
 547         return 0;
 548 }
 549
 550 /* Must be called with vb_queue_lock hold */
 551 static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
 552 {
 553         unsigned long flags;
 554
 555         dev_dbg(dev->dev, "\n");
 556
 557         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 558         while (!list_empty(&dev->queued_bufs)) {
 559                 struct msi2500_frame_buf *buf;
 560
 561                 buf = list_entry(dev->queued_bufs.next,
 562                                  struct msi2500_frame_buf, list);
 563                 list_del(&buf->list);
 564                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 565         }
 566         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 567 }
 568
 569 /* The user yanked out the cable... */
 570 static void msi2500_disconnect(struct usb_interface *intf)
 571 {
 572         struct v4l2_device *v = usb_get_intfdata(intf);
 573         struct msi2500_dev *dev =
 574                         container_of(v, struct msi2500_dev, v4l2_dev);
 575
 576         dev_dbg(dev->dev, "\n");
 577
 578         mutex_lock(&dev->vb_queue_lock);
 579         mutex_lock(&dev->v4l2_lock);
 580         /* No need to keep the urbs around after disconnection */
 581         dev->udev = NULL;
 582         v4l2_device_disconnect(&dev->v4l2_dev);
 583         video_unregister_device(&dev->vdev);
 584         spi_unregister_master(dev->master);
 585         mutex_unlock(&dev->v4l2_lock);
 586         mutex_unlock(&dev->vb_queue_lock);
 587
 588         v4l2_device_put(&dev->v4l2_dev);
 589 }
 590
 591 static int msi2500_querycap(struct file *file, void *fh,
 592                             struct v4l2_capability *cap)
 593 {
 594         struct msi2500_dev *dev = video_drvdata(file);
 595
 596         dev_dbg(dev->dev, "\n");
 597
 598         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 599         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 600         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 601         return 0;
 602 }
 603
 604 /* Videobuf2 operations */
 605 static int msi2500_queue_setup(struct vb2_queue *vq,
 606                                unsigned int *nbuffers,
 607                                unsigned int *nplanes, unsigned int sizes[],
 608                                struct device *alloc_devs[])
 609 {
 610         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 611
 612         dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
 613
 614         /* Absolute min and max number of buffers available for mmap() */
 615         *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
 616         *nplanes = 1;
 617         sizes[0] = PAGE_ALIGN(dev->buffersize);
 618         dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 619         return 0;
 620 }
 621
 622 static void msi2500_buf_queue(struct vb2_buffer *vb)
 623 {
 624         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 625         struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 626         struct msi2500_frame_buf *buf = container_of(vbuf,
 627                                                      struct msi2500_frame_buf,
 628                                                      vb);
 629         unsigned long flags;
 630
 631         /* Check the device has not disconnected between prep and queuing */
 632         if (unlikely(!dev->udev)) {
 633                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 634                 return;
 635         }
 636
 637         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 638         list_add_tail(&buf->list, &dev->queued_bufs);
 639         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 640 }
 641
 642 #define CMD_WREG               0x41
 643 #define CMD_START_STREAMING    0x43
 644 #define CMD_STOP_STREAMING     0x45
 645 #define CMD_READ_UNKNOWN       0x48
 646
 647 #define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
 648         char *_direction; \
 649         if (_t & USB_DIR_IN) \
 650                 _direction = "<<<"; \
 651         else \
 652                 _direction = ">>>"; \
 653         dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
 654                         _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
 655                         _l & 0xff, _l >> 8, _direction, _l, _b); \
 656 }
 657
 658 static int msi2500_ctrl_msg(struct msi2500_dev *dev, u8 cmd, u32 data)
 659 {
 660         int ret;
 661         u8 request = cmd;
 662         u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
 663         u16 value = (data >> 0) & 0xffff;
 664         u16 index = (data >> 16) & 0xffff;
 665
 666         msi2500_dbg_usb_control_msg(dev->dev, request, requesttype,
 667                                     value, index, NULL, 0);
 668         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
 669                               requesttype, value, index, NULL, 0, 2000);
 670         if (ret)
 671                 dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
 672                         ret, cmd, data);
 673
 674         return ret;
 675 }
 676
 677 static int msi2500_set_usb_adc(struct msi2500_dev *dev)
 678 {
 679         int ret;
 680         unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
 681         u32 reg3, reg4, reg7;
 682         struct v4l2_ctrl *bandwidth_auto;
 683         struct v4l2_ctrl *bandwidth;
 684
 685         f_sr = dev->f_adc;
 686
 687         /* set tuner, subdev, filters according to sampling rate */
 688         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 689                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 690         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 691                 bandwidth = v4l2_ctrl_find(&dev->hdl,
 692                                 V4L2_CID_RF_TUNER_BANDWIDTH);
 693                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 694         }
 695
 696         /* select stream format */
 697         switch (dev->pixelformat) {
 698         case V4L2_SDR_FMT_CU8:
 699                 reg7 = 0x000c9407; /* 504 */
 700                 break;
 701         case  V4L2_SDR_FMT_CU16LE:
 702                 reg7 = 0x00009407; /* 252 */
 703                 break;
 704         case V4L2_SDR_FMT_CS8:
 705                 reg7 = 0x000c9407; /* 504 */
 706                 break;
 707         case MSI2500_PIX_FMT_SDR_MSI2500_384:
 708                 reg7 = 0x0000a507; /* 384 */
 709                 break;
 710         case MSI2500_PIX_FMT_SDR_S12:
 711                 reg7 = 0x00008507; /* 336 */
 712                 break;
 713         case V4L2_SDR_FMT_CS14LE:
 714                 reg7 = 0x00009407; /* 252 */
 715                 break;
 716         default:
 717                 reg7 = 0x000c9407; /* 504 */
 718                 break;
 719         }
 720
 721         /*
 722          * Fractional-N synthesizer
 723          *
 724          *           +----------------------------------------+
 725          *           v                                        |
 726          *  Fref   +----+     +-------+     +-----+         +------+     +---+
 727          * ------> | PD | --> |  VCO  | --> | /2  | ------> | /N.F | <-- | K |
 728          *         +----+     +-------+     +-----+         +------+     +---+
 729          *                      |
 730          *                      |
 731          *                      v
 732          *                    +-------+     +-----+  Fout
 733          *                    | /Rout | --> | /12 | ------>
 734          *                    +-------+     +-----+
 735          */
 736         /*
 737          * Synthesizer config is just a educated guess...
 738          *
 739          * [7:0]   0x03, register address
 740          * [8]     1, power control
 741          * [9]     ?, power control
 742          * [12:10] output divider
 743          * [13]    0 ?
 744          * [14]    0 ?
 745          * [15]    fractional MSB, bit 20
 746          * [16:19] N
 747          * [23:20] ?
 748          * [24:31] 0x01
 749          *
 750          * output divider
 751          * val   div
 752          *   0     - (invalid)
 753          *   1     4
 754          *   2     6
 755          *   3     8
 756          *   4    10
 757          *   5    12
 758          *   6    14
 759          *   7    16
 760          *
 761          * VCO 202000000 - 720000000++
 762          */
 763
 764         #define F_REF 24000000
 765         #define DIV_PRE_N 2
 766         #define DIV_LO_OUT 12
 767         reg3 = 0x01000303;
 768         reg4 = 0x00000004;
 769
 770         /* XXX: Filters? AGC? VCO band? */
 771         if (f_sr < 6000000)
 772                 reg3 |= 0x1 << 20;
 773         else if (f_sr < 7000000)
 774                 reg3 |= 0x5 << 20;
 775         else if (f_sr < 8500000)
 776                 reg3 |= 0x9 << 20;
 777         else
 778                 reg3 |= 0xd << 20;
 779
 780         for (div_out = 4; div_out < 16; div_out += 2) {
 781                 f_vco = f_sr * div_out * DIV_LO_OUT;
 782                 dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
 783                 if (f_vco >= 202000000)
 784                         break;
 785         }
 786
 787         /* Calculate PLL integer and fractional control word. */
 788         div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
 789         k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
 790
 791         reg3 |= div_n << 16;
 792         reg3 |= (div_out / 2 - 1) << 10;
 793         reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
 794         reg4 |= ((k_cw >>  0) & 0x0fffff) <<  8; /* [19:0] */
 795
 796         dev_dbg(dev->dev,
 797                 "f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
 798                 f_sr, f_vco, div_n, k, div_out, reg3, reg4);
 799
 800         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
 801         if (ret)
 802                 goto err;
 803
 804         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
 805         if (ret)
 806                 goto err;
 807
 808         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
 809         if (ret)
 810                 goto err;
 811
 812         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
 813         if (ret)
 814                 goto err;
 815
 816         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
 817         if (ret)
 818                 goto err;
 819
 820         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
 821         if (ret)
 822                 goto err;
 823
 824         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
 825         if (ret)
 826                 goto err;
 827
 828         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
 829 err:
 830         return ret;
 831 }
 832
 833 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
 834 {
 835         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 836         int ret;
 837
 838         dev_dbg(dev->dev, "\n");
 839
 840         if (!dev->udev)
 841                 return -ENODEV;
 842
 843         if (mutex_lock_interruptible(&dev->v4l2_lock))
 844                 return -ERESTARTSYS;
 845
 846         /* wake-up tuner */
 847         v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 848
 849         ret = msi2500_set_usb_adc(dev);
 850
 851         ret = msi2500_isoc_init(dev);
 852         if (ret)
 853                 msi2500_cleanup_queued_bufs(dev);
 854
 855         ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
 856
 857         mutex_unlock(&dev->v4l2_lock);
 858
 859         return ret;
 860 }
 861
 862 static void msi2500_stop_streaming(struct vb2_queue *vq)
 863 {
 864         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 865
 866         dev_dbg(dev->dev, "\n");
 867
 868         mutex_lock(&dev->v4l2_lock);
 869
 870         if (dev->udev)
 871                 msi2500_isoc_cleanup(dev);
 872
 873         msi2500_cleanup_queued_bufs(dev);
 874
 875         /* according to tests, at least 700us delay is required  */
 876         msleep(20);
 877         if (!msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
 878                 /* sleep USB IF / ADC */
 879                 msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
 880         }
 881
 882         /* sleep tuner */
 883         v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 884
 885         mutex_unlock(&dev->v4l2_lock);
 886 }
 887
 888 static const struct vb2_ops msi2500_vb2_ops = {
 889         .queue_setup            = msi2500_queue_setup,
 890         .buf_queue              = msi2500_buf_queue,
 891         .start_streaming        = msi2500_start_streaming,
 892         .stop_streaming         = msi2500_stop_streaming,
 893         .wait_prepare           = vb2_ops_wait_prepare,
 894         .wait_finish            = vb2_ops_wait_finish,
 895 };
 896
 897 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
 898                                     struct v4l2_fmtdesc *f)
 899 {
 900         struct msi2500_dev *dev = video_drvdata(file);
 901
 902         dev_dbg(dev->dev, "index=%d\n", f->index);
 903
 904         if (f->index >= dev->num_formats)
 905                 return -EINVAL;
 906
 907         strscpy(f->description, formats[f->index].name, sizeof(f->description));
 908         f->pixelformat = formats[f->index].pixelformat;
 909
 910         return 0;
 911 }
 912
 913 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
 914                                  struct v4l2_format *f)
 915 {
 916         struct msi2500_dev *dev = video_drvdata(file);
 917
 918         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 919                 (char *)&dev->pixelformat);
 920
 921         f->fmt.sdr.pixelformat = dev->pixelformat;
 922         f->fmt.sdr.buffersize = dev->buffersize;
 923         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 924
 925         return 0;
 926 }
 927
 928 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
 929                                  struct v4l2_format *f)
 930 {
 931         struct msi2500_dev *dev = video_drvdata(file);
 932         struct vb2_queue *q = &dev->vb_queue;
 933         int i;
 934
 935         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 936                 (char *)&f->fmt.sdr.pixelformat);
 937
 938         if (vb2_is_busy(q))
 939                 return -EBUSY;
 940
 941         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 942         for (i = 0; i < dev->num_formats; i++) {
 943                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 944                         dev->pixelformat = formats[i].pixelformat;
 945                         dev->buffersize = formats[i].buffersize;
 946                         f->fmt.sdr.buffersize = formats[i].buffersize;
 947                         return 0;
 948                 }
 949         }
 950
 951         dev->pixelformat = formats[0].pixelformat;
 952         dev->buffersize = formats[0].buffersize;
 953         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 954         f->fmt.sdr.buffersize = formats[0].buffersize;
 955
 956         return 0;
 957 }
 958
 959 static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
 960                                    struct v4l2_format *f)
 961 {
 962         struct msi2500_dev *dev = video_drvdata(file);
 963         int i;
 964
 965         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 966                 (char *)&f->fmt.sdr.pixelformat);
 967
 968         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 969         for (i = 0; i < dev->num_formats; i++) {
 970                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 971                         f->fmt.sdr.buffersize = formats[i].buffersize;
 972                         return 0;
 973                 }
 974         }
 975
 976         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 977         f->fmt.sdr.buffersize = formats[0].buffersize;
 978
 979         return 0;
 980 }
 981
 982 static int msi2500_s_tuner(struct file *file, void *priv,
 983                            const struct v4l2_tuner *v)
 984 {
 985         struct msi2500_dev *dev = video_drvdata(file);
 986         int ret;
 987
 988         dev_dbg(dev->dev, "index=%d\n", v->index);
 989
 990         if (v->index == 0)
 991                 ret = 0;
 992         else if (v->index == 1)
 993                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 994         else
 995                 ret = -EINVAL;
 996
 997         return ret;
 998 }
 999
1000 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
1001 {
1002         struct msi2500_dev *dev = video_drvdata(file);
1003         int ret;
1004
1005         dev_dbg(dev->dev, "index=%d\n", v->index);
1006
1007         if (v->index == 0) {
1008                 strscpy(v->name, "Mirics MSi2500", sizeof(v->name));
1009                 v->type = V4L2_TUNER_ADC;
1010                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1011                 v->rangelow =   1200000;
1012                 v->rangehigh = 15000000;
1013                 ret = 0;
1014         } else if (v->index == 1) {
1015                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1016         } else {
1017                 ret = -EINVAL;
1018         }
1019
1020         return ret;
1021 }
1022
1023 static int msi2500_g_frequency(struct file *file, void *priv,
1024                                struct v4l2_frequency *f)
1025 {
1026         struct msi2500_dev *dev = video_drvdata(file);
1027         int ret  = 0;
1028
1029         dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1030
1031         if (f->tuner == 0) {
1032                 f->frequency = dev->f_adc;
1033                 ret = 0;
1034         } else if (f->tuner == 1) {
1035                 f->type = V4L2_TUNER_RF;
1036                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1037         } else {
1038                 ret = -EINVAL;
1039         }
1040
1041         return ret;
1042 }
1043
1044 static int msi2500_s_frequency(struct file *file, void *priv,
1045                                const struct v4l2_frequency *f)
1046 {
1047         struct msi2500_dev *dev = video_drvdata(file);
1048         int ret;
1049
1050         dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
1051                 f->tuner, f->type, f->frequency);
1052
1053         if (f->tuner == 0) {
1054                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1055                                      bands[0].rangelow,
1056                                      bands[0].rangehigh);
1057                 dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1058                 ret = msi2500_set_usb_adc(dev);
1059         } else if (f->tuner == 1) {
1060                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1061         } else {
1062                 ret = -EINVAL;
1063         }
1064
1065         return ret;
1066 }
1067
1068 static int msi2500_enum_freq_bands(struct file *file, void *priv,
1069                                    struct v4l2_frequency_band *band)
1070 {
1071         struct msi2500_dev *dev = video_drvdata(file);
1072         int ret;
1073
1074         dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
1075                 band->tuner, band->type, band->index);
1076
1077         if (band->tuner == 0) {
1078                 if (band->index >= ARRAY_SIZE(bands)) {
1079                         ret = -EINVAL;
1080                 } else {
1081                         *band = bands[band->index];
1082                         ret = 0;
1083                 }
1084         } else if (band->tuner == 1) {
1085                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner,
1086                                        enum_freq_bands, band);
1087         } else {
1088                 ret = -EINVAL;
1089         }
1090
1091         return ret;
1092 }
1093
1094 static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1095         .vidioc_querycap          = msi2500_querycap,
1096
1097         .vidioc_enum_fmt_sdr_cap  = msi2500_enum_fmt_sdr_cap,
1098         .vidioc_g_fmt_sdr_cap     = msi2500_g_fmt_sdr_cap,
1099         .vidioc_s_fmt_sdr_cap     = msi2500_s_fmt_sdr_cap,
1100         .vidioc_try_fmt_sdr_cap   = msi2500_try_fmt_sdr_cap,
1101
1102         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1103         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1104         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1105         .vidioc_querybuf          = vb2_ioctl_querybuf,
1106         .vidioc_qbuf              = vb2_ioctl_qbuf,
1107         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1108
1109         .vidioc_streamon          = vb2_ioctl_streamon,
1110         .vidioc_streamoff         = vb2_ioctl_streamoff,
1111
1112         .vidioc_g_tuner           = msi2500_g_tuner,
1113         .vidioc_s_tuner           = msi2500_s_tuner,
1114
1115         .vidioc_g_frequency       = msi2500_g_frequency,
1116         .vidioc_s_frequency       = msi2500_s_frequency,
1117         .vidioc_enum_freq_bands   = msi2500_enum_freq_bands,
1118
1119         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1120         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1121         .vidioc_log_status        = v4l2_ctrl_log_status,
1122 };
1123
1124 static const struct v4l2_file_operations msi2500_fops = {
1125         .owner                    = THIS_MODULE,
1126         .open                     = v4l2_fh_open,
1127         .release                  = vb2_fop_release,
1128         .read                     = vb2_fop_read,
1129         .poll                     = vb2_fop_poll,
1130         .mmap                     = vb2_fop_mmap,
1131         .unlocked_ioctl           = video_ioctl2,
1132 };
1133
1134 static const struct video_device msi2500_template = {
1135         .name                     = "Mirics MSi3101 SDR Dongle",
1136         .release                  = video_device_release_empty,
1137         .fops                     = &msi2500_fops,
1138         .ioctl_ops                = &msi2500_ioctl_ops,
1139 };
1140
1141 static void msi2500_video_release(struct v4l2_device *v)
1142 {
1143         struct msi2500_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
1144
1145         v4l2_ctrl_handler_free(&dev->hdl);
1146         v4l2_device_unregister(&dev->v4l2_dev);
1147         kfree(dev);
1148 }
1149
1150 static int msi2500_transfer_one_message(struct spi_master *master,
1151                                         struct spi_message *m)
1152 {
1153         struct msi2500_dev *dev = spi_master_get_devdata(master);
1154         struct spi_transfer *t;
1155         int ret = 0;
1156         u32 data;
1157
1158         list_for_each_entry(t, &m->transfers, transfer_list) {
1159                 dev_dbg(dev->dev, "msg=%*ph\n", t->len, t->tx_buf);
1160                 data = 0x09; /* reg 9 is SPI adapter */
1161                 data |= ((u8 *)t->tx_buf)[0] << 8;
1162                 data |= ((u8 *)t->tx_buf)[1] << 16;
1163                 data |= ((u8 *)t->tx_buf)[2] << 24;
1164                 ret = msi2500_ctrl_msg(dev, CMD_WREG, data);
1165         }
1166
1167         m->status = ret;
1168         spi_finalize_current_message(master);
1169         return ret;
1170 }
1171
1172 static int msi2500_probe(struct usb_interface *intf,
1173                          const struct usb_device_id *id)
1174 {
1175         struct msi2500_dev *dev;
1176         struct v4l2_subdev *sd;
1177         struct spi_master *master;
1178         int ret;
1179         static struct spi_board_info board_info = {
1180                 .modalias               = "msi001",
1181                 .bus_num                = 0,
1182                 .chip_select            = 0,
1183                 .max_speed_hz           = 12000000,
1184         };
1185
1186         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1187         if (!dev) {
1188                 ret = -ENOMEM;
1189                 goto err;
1190         }
1191
1192         mutex_init(&dev->v4l2_lock);
1193         mutex_init(&dev->vb_queue_lock);
1194         spin_lock_init(&dev->queued_bufs_lock);
1195         INIT_LIST_HEAD(&dev->queued_bufs);
1196         dev->dev = &intf->dev;
1197         dev->udev = interface_to_usbdev(intf);
1198         dev->f_adc = bands[0].rangelow;
1199         dev->pixelformat = formats[0].pixelformat;
1200         dev->buffersize = formats[0].buffersize;
1201         dev->num_formats = NUM_FORMATS;
1202         if (!msi2500_emulated_fmt)
1203                 dev->num_formats -= 2;
1204
1205         /* Init videobuf2 queue structure */
1206         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1207         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1208         dev->vb_queue.drv_priv = dev;
1209         dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1210         dev->vb_queue.ops = &msi2500_vb2_ops;
1211         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1212         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1213         ret = vb2_queue_init(&dev->vb_queue);
1214         if (ret) {
1215                 dev_err(dev->dev, "Could not initialize vb2 queue\n");
1216                 goto err_free_mem;
1217         }
1218
1219         /* Init video_device structure */
1220         dev->vdev = msi2500_template;
1221         dev->vdev.queue = &dev->vb_queue;
1222         dev->vdev.queue->lock = &dev->vb_queue_lock;
1223         video_set_drvdata(&dev->vdev, dev);
1224
1225         /* Register the v4l2_device structure */
1226         dev->v4l2_dev.release = msi2500_video_release;
1227         ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1228         if (ret) {
1229                 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
1230                 goto err_free_mem;
1231         }
1232
1233         /* SPI master adapter */
1234         master = spi_alloc_master(dev->dev, 0);
1235         if (master == NULL) {
1236                 ret = -ENOMEM;
1237                 goto err_unregister_v4l2_dev;
1238         }
1239
1240         dev->master = master;
1241         master->bus_num = 0;
1242         master->num_chipselect = 1;
1243         master->transfer_one_message = msi2500_transfer_one_message;
1244         spi_master_set_devdata(master, dev);
1245         ret = spi_register_master(master);
1246         if (ret) {
1247                 spi_master_put(master);
1248                 goto err_unregister_v4l2_dev;
1249         }
1250
1251         /* load v4l2 subdevice */
1252         sd = v4l2_spi_new_subdev(&dev->v4l2_dev, master, &board_info);
1253         dev->v4l2_subdev = sd;
1254         if (sd == NULL) {
1255                 dev_err(dev->dev, "cannot get v4l2 subdevice\n");
1256                 ret = -ENODEV;
1257                 goto err_unregister_master;
1258         }
1259
1260         /* Register controls */
1261         v4l2_ctrl_handler_init(&dev->hdl, 0);
1262         if (dev->hdl.error) {
1263                 ret = dev->hdl.error;
1264                 dev_err(dev->dev, "Could not initialize controls\n");
1265                 goto err_free_controls;
1266         }
1267
1268         /* currently all controls are from subdev */
1269         v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL, true);
1270
1271         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1272         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1273         dev->vdev.lock = &dev->v4l2_lock;
1274         dev->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1275                                 V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
1276
1277         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1278         if (ret) {
1279                 dev_err(dev->dev,
1280                         "Failed to register as video device (%d)\n", ret);
1281                 goto err_unregister_v4l2_dev;
1282         }
1283         dev_info(dev->dev, "Registered as %s\n",
1284                  video_device_node_name(&dev->vdev));
1285         dev_notice(dev->dev,
1286                    "SDR API is still slightly experimental and functionality changes may follow\n");
1287         return 0;
1288 err_free_controls:
1289         v4l2_ctrl_handler_free(&dev->hdl);
1290 err_unregister_master:
1291         spi_unregister_master(dev->master);
1292 err_unregister_v4l2_dev:
1293         v4l2_device_unregister(&dev->v4l2_dev);
1294 err_free_mem:
1295         kfree(dev);
1296 err:
1297         return ret;
1298 }
1299
1300 /* USB device ID list */
1301 static const struct usb_device_id msi2500_id_table[] = {
1302         {USB_DEVICE(0x1df7, 0x2500)}, /* Mirics MSi3101 SDR Dongle */
1303         {USB_DEVICE(0x2040, 0xd300)}, /* Hauppauge WinTV 133559 LF */
1304         {}
1305 };
1306 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1307
1308 /* USB subsystem interface */
1309 static struct usb_driver msi2500_driver = {
1310         .name                     = KBUILD_MODNAME,
1311         .probe                    = msi2500_probe,
1312         .disconnect               = msi2500_disconnect,
1313         .id_table                 = msi2500_id_table,
1314 };
1315
1316 module_usb_driver(msi2500_driver);
1317
1318 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1319 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1320 MODULE_LICENSE("GPL");