drivers/media/usb/msi2500/msi2500.c

   1 /*
   2  * Mirics MSi2500 driver
   3  * Mirics MSi3101 SDR Dongle driver
   4  *
   5  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  * That driver is somehow based of pwc driver:
  18  *  (C) 1999-2004 Nemosoft Unv.
  19  *  (C) 2004-2006 Luc Saillard (luc@saillard.org)
  20  *  (C) 2011 Hans de Goede <hdegoede@redhat.com>
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <asm/div64.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-ioctl.h>
  28 #include <media/v4l2-ctrls.h>
  29 #include <media/v4l2-event.h>
  30 #include <linux/usb.h>
  31 #include <media/videobuf2-v4l2.h>
  32 #include <media/videobuf2-vmalloc.h>
  33 #include <linux/spi/spi.h>
  34
  35 static bool msi2500_emulated_fmt;
  36 module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
  37 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  38
  39 /*
  40  *   iConfiguration          0
  41  *     bInterfaceNumber        0
  42  *     bAlternateSetting       1
  43  *     bNumEndpoints           1
  44  *       bEndpointAddress     0x81  EP 1 IN
  45  *       bmAttributes            1
  46  *         Transfer Type            Isochronous
  47  *       wMaxPacketSize     0x1400  3x 1024 bytes
  48  *       bInterval               1
  49  */
  50 #define MAX_ISO_BUFS            (8)
  51 #define ISO_FRAMES_PER_DESC     (8)
  52 #define ISO_MAX_FRAME_SIZE      (3 * 1024)
  53 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  54 #define MAX_ISOC_ERRORS         20
  55
  56 /*
  57  * TODO: These formats should be moved to V4L2 API. Formats are currently
  58  * disabled from formats[] table, not visible to userspace.
  59  */
  60  /* signed 12-bit */
  61 #define MSI2500_PIX_FMT_SDR_S12         v4l2_fourcc('D', 'S', '1', '2')
  62 /* Mirics MSi2500 format 384 */
  63 #define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
  64
  65 static const struct v4l2_frequency_band bands[] = {
  66         {
  67                 .tuner = 0,
  68                 .type = V4L2_TUNER_ADC,
  69                 .index = 0,
  70                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  71                 .rangelow   =  1200000,
  72                 .rangehigh  = 15000000,
  73         },
  74 };
  75
  76 /* stream formats */
  77 struct msi2500_format {
  78         char    *name;
  79         u32     pixelformat;
  80         u32     buffersize;
  81 };
  82
  83 /* format descriptions for capture and preview */
  84 static struct msi2500_format formats[] = {
  85         {
  86                 .name           = "Complex S8",
  87                 .pixelformat    = V4L2_SDR_FMT_CS8,
  88                 .buffersize     = 3 * 1008,
  89 #if 0
  90         }, {
  91                 .name           = "10+2-bit signed",
  92                 .pixelformat    = MSI2500_PIX_FMT_SDR_MSI2500_384,
  93         }, {
  94                 .name           = "12-bit signed",
  95                 .pixelformat    = MSI2500_PIX_FMT_SDR_S12,
  96 #endif
  97         }, {
  98                 .name           = "Complex S14LE",
  99                 .pixelformat    = V4L2_SDR_FMT_CS14LE,
 100                 .buffersize     = 3 * 1008,
 101         }, {
 102                 .name           = "Complex U8 (emulated)",
 103                 .pixelformat    = V4L2_SDR_FMT_CU8,
 104                 .buffersize     = 3 * 1008,
 105         }, {
 106                 .name           = "Complex U16LE (emulated)",
 107                 .pixelformat    =  V4L2_SDR_FMT_CU16LE,
 108                 .buffersize     = 3 * 1008,
 109         },
 110 };
 111
 112 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
 113
 114 /* intermediate buffers with raw data from the USB device */
 115 struct msi2500_frame_buf {
 116         /* common v4l buffer stuff -- must be first */
 117         struct vb2_v4l2_buffer vb;
 118         struct list_head list;
 119 };
 120
 121 struct msi2500_dev {
 122         struct device *dev;
 123         struct video_device vdev;
 124         struct v4l2_device v4l2_dev;
 125         struct v4l2_subdev *v4l2_subdev;
 126         struct spi_master *master;
 127
 128         /* videobuf2 queue and queued buffers list */
 129         struct vb2_queue vb_queue;
 130         struct list_head queued_bufs;
 131         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 132
 133         /* Note if taking both locks v4l2_lock must always be locked first! */
 134         struct mutex v4l2_lock;      /* Protects everything else */
 135         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 136
 137         /* Pointer to our usb_device, will be NULL after unplug */
 138         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 139
 140         unsigned int f_adc;
 141         u32 pixelformat;
 142         u32 buffersize;
 143         unsigned int num_formats;
 144
 145         unsigned int isoc_errors; /* number of contiguous ISOC errors */
 146         unsigned int vb_full; /* vb is full and packets dropped */
 147
 148         struct urb *urbs[MAX_ISO_BUFS];
 149
 150         /* Controls */
 151         struct v4l2_ctrl_handler hdl;
 152
 153         u32 next_sample; /* for track lost packets */
 154         u32 sample; /* for sample rate calc */
 155         unsigned long jiffies_next;
 156 };
 157
 158 /* Private functions */
 159 static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
 160                                                         struct msi2500_dev *dev)
 161 {
 162         unsigned long flags;
 163         struct msi2500_frame_buf *buf = NULL;
 164
 165         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 166         if (list_empty(&dev->queued_bufs))
 167                 goto leave;
 168
 169         buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
 170         list_del(&buf->list);
 171 leave:
 172         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 173         return buf;
 174 }
 175
 176 /*
 177  * +===========================================================================
 178  * |   00-1023 | USB packet type '504'
 179  * +===========================================================================
 180  * |   00-  03 | sequence number of first sample in that USB packet
 181  * +---------------------------------------------------------------------------
 182  * |   04-  15 | garbage
 183  * +---------------------------------------------------------------------------
 184  * |   16-1023 | samples
 185  * +---------------------------------------------------------------------------
 186  * signed 8-bit sample
 187  * 504 * 2 = 1008 samples
 188  *
 189  *
 190  * +===========================================================================
 191  * |   00-1023 | USB packet type '384'
 192  * +===========================================================================
 193  * |   00-  03 | sequence number of first sample in that USB packet
 194  * +---------------------------------------------------------------------------
 195  * |   04-  15 | garbage
 196  * +---------------------------------------------------------------------------
 197  * |   16- 175 | samples
 198  * +---------------------------------------------------------------------------
 199  * |  176- 179 | control bits for previous samples
 200  * +---------------------------------------------------------------------------
 201  * |  180- 339 | samples
 202  * +---------------------------------------------------------------------------
 203  * |  340- 343 | control bits for previous samples
 204  * +---------------------------------------------------------------------------
 205  * |  344- 503 | samples
 206  * +---------------------------------------------------------------------------
 207  * |  504- 507 | control bits for previous samples
 208  * +---------------------------------------------------------------------------
 209  * |  508- 667 | samples
 210  * +---------------------------------------------------------------------------
 211  * |  668- 671 | control bits for previous samples
 212  * +---------------------------------------------------------------------------
 213  * |  672- 831 | samples
 214  * +---------------------------------------------------------------------------
 215  * |  832- 835 | control bits for previous samples
 216  * +---------------------------------------------------------------------------
 217  * |  836- 995 | samples
 218  * +---------------------------------------------------------------------------
 219  * |  996- 999 | control bits for previous samples
 220  * +---------------------------------------------------------------------------
 221  * | 1000-1023 | garbage
 222  * +---------------------------------------------------------------------------
 223  *
 224  * Bytes 4 - 7 could have some meaning?
 225  *
 226  * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
 227  * numbers. This results one 2-bit number for 8 samples. It is likely used for
 228  * for bit shifting sample by given bits, increasing actual sampling resolution.
 229  * Number 2 (0b10) was never seen.
 230  *
 231  * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
 232  *
 233  *
 234  * +===========================================================================
 235  * |   00-1023 | USB packet type '336'
 236  * +===========================================================================
 237  * |   00-  03 | sequence number of first sample in that USB packet
 238  * +---------------------------------------------------------------------------
 239  * |   04-  15 | garbage
 240  * +---------------------------------------------------------------------------
 241  * |   16-1023 | samples
 242  * +---------------------------------------------------------------------------
 243  * signed 12-bit sample
 244  *
 245  *
 246  * +===========================================================================
 247  * |   00-1023 | USB packet type '252'
 248  * +===========================================================================
 249  * |   00-  03 | sequence number of first sample in that USB packet
 250  * +---------------------------------------------------------------------------
 251  * |   04-  15 | garbage
 252  * +---------------------------------------------------------------------------
 253  * |   16-1023 | samples
 254  * +---------------------------------------------------------------------------
 255  * signed 14-bit sample
 256  */
 257
 258 static int msi2500_convert_stream(struct msi2500_dev *dev, u8 *dst, u8 *src,
 259                                   unsigned int src_len)
 260 {
 261         unsigned int i, j, transactions, dst_len = 0;
 262         u32 sample[3];
 263
 264         /* There could be 1-3 1024 byte transactions per packet */
 265         transactions = src_len / 1024;
 266
 267         for (i = 0; i < transactions; i++) {
 268                 sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
 269                                 src[0] << 0;
 270                 if (i == 0 && dev->next_sample != sample[0]) {
 271                         dev_dbg_ratelimited(dev->dev,
 272                                             "%d samples lost, %d %08x:%08x\n",
 273                                             sample[0] - dev->next_sample,
 274                                             src_len, dev->next_sample,
 275                                             sample[0]);
 276                 }
 277
 278                 /*
 279                  * Dump all unknown 'garbage' data - maybe we will discover
 280                  * someday if there is something rational...
 281                  */
 282                 dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
 283
 284                 src += 16; /* skip header */
 285
 286                 switch (dev->pixelformat) {
 287                 case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
 288                 {
 289                         s8 *s8src = (s8 *)src;
 290                         u8 *u8dst = (u8 *)dst;
 291
 292                         for (j = 0; j < 1008; j++)
 293                                 *u8dst++ = *s8src++ + 128;
 294
 295                         src += 1008;
 296                         dst += 1008;
 297                         dst_len += 1008;
 298                         dev->next_sample = sample[i] + 504;
 299                         break;
 300                 }
 301                 case  V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
 302                 {
 303                         s16 *s16src = (s16 *)src;
 304                         u16 *u16dst = (u16 *)dst;
 305                         struct {signed int x:14; } se; /* sign extension */
 306                         unsigned int utmp;
 307
 308                         for (j = 0; j < 1008; j += 2) {
 309                                 /* sign extension from 14-bit to signed int */
 310                                 se.x = *s16src++;
 311                                 /* from signed int to unsigned int */
 312                                 utmp = se.x + 8192;
 313                                 /* from 14-bit to 16-bit */
 314                                 *u16dst++ = utmp << 2 | utmp >> 12;
 315                         }
 316
 317                         src += 1008;
 318                         dst += 1008;
 319                         dst_len += 1008;
 320                         dev->next_sample = sample[i] + 252;
 321                         break;
 322                 }
 323                 case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
 324                         /* Dump unknown 'garbage' data */
 325                         dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
 326                         memcpy(dst, src, 984);
 327                         src += 984 + 24;
 328                         dst += 984;
 329                         dst_len += 984;
 330                         dev->next_sample = sample[i] + 384;
 331                         break;
 332                 case V4L2_SDR_FMT_CS8:         /* 504 x IQ samples */
 333                         memcpy(dst, src, 1008);
 334                         src += 1008;
 335                         dst += 1008;
 336                         dst_len += 1008;
 337                         dev->next_sample = sample[i] + 504;
 338                         break;
 339                 case MSI2500_PIX_FMT_SDR_S12:  /* 336 x IQ samples */
 340                         memcpy(dst, src, 1008);
 341                         src += 1008;
 342                         dst += 1008;
 343                         dst_len += 1008;
 344                         dev->next_sample = sample[i] + 336;
 345                         break;
 346                 case V4L2_SDR_FMT_CS14LE:      /* 252 x IQ samples */
 347                         memcpy(dst, src, 1008);
 348                         src += 1008;
 349                         dst += 1008;
 350                         dst_len += 1008;
 351                         dev->next_sample = sample[i] + 252;
 352                         break;
 353                 default:
 354                         break;
 355                 }
 356         }
 357
 358         /* calculate sample rate and output it in 10 seconds intervals */
 359         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 360                 #define MSECS 10000UL
 361                 unsigned int msecs = jiffies_to_msecs(jiffies -
 362                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 363                 unsigned int samples = dev->next_sample - dev->sample;
 364
 365                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 366                 dev->sample = dev->next_sample;
 367                 dev_dbg(dev->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
 368                         src_len, samples, msecs,
 369                         samples * 1000UL / msecs);
 370         }
 371
 372         return dst_len;
 373 }
 374
 375 /*
 376  * This gets called for the Isochronous pipe (stream). This is done in interrupt
 377  * time, so it has to be fast, not crash, and not stall. Neat.
 378  */
 379 static void msi2500_isoc_handler(struct urb *urb)
 380 {
 381         struct msi2500_dev *dev = (struct msi2500_dev *)urb->context;
 382         int i, flen, fstatus;
 383         unsigned char *iso_buf = NULL;
 384         struct msi2500_frame_buf *fbuf;
 385
 386         if (unlikely(urb->status == -ENOENT ||
 387                      urb->status == -ECONNRESET ||
 388                      urb->status == -ESHUTDOWN)) {
 389                 dev_dbg(dev->dev, "URB (%p) unlinked %ssynchronously\n",
 390                         urb, urb->status == -ENOENT ? "" : "a");
 391                 return;
 392         }
 393
 394         if (unlikely(urb->status != 0)) {
 395                 dev_dbg(dev->dev, "called with status %d\n", urb->status);
 396                 /* Give up after a number of contiguous errors */
 397                 if (++dev->isoc_errors > MAX_ISOC_ERRORS)
 398                         dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
 399                 goto handler_end;
 400         } else {
 401                 /* Reset ISOC error counter. We did get here, after all. */
 402                 dev->isoc_errors = 0;
 403         }
 404
 405         /* Compact data */
 406         for (i = 0; i < urb->number_of_packets; i++) {
 407                 void *ptr;
 408
 409                 /* Check frame error */
 410                 fstatus = urb->iso_frame_desc[i].status;
 411                 if (unlikely(fstatus)) {
 412                         dev_dbg_ratelimited(dev->dev,
 413                                             "frame=%d/%d has error %d skipping\n",
 414                                             i, urb->number_of_packets, fstatus);
 415                         continue;
 416                 }
 417
 418                 /* Check if that frame contains data */
 419                 flen = urb->iso_frame_desc[i].actual_length;
 420                 if (unlikely(flen == 0))
 421                         continue;
 422
 423                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 424
 425                 /* Get free framebuffer */
 426                 fbuf = msi2500_get_next_fill_buf(dev);
 427                 if (unlikely(fbuf == NULL)) {
 428                         dev->vb_full++;
 429                         dev_dbg_ratelimited(dev->dev,
 430                                             "videobuf is full, %d packets dropped\n",
 431                                             dev->vb_full);
 432                         continue;
 433                 }
 434
 435                 /* fill framebuffer */
 436                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 437                 flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
 438                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
 439                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 440         }
 441
 442 handler_end:
 443         i = usb_submit_urb(urb, GFP_ATOMIC);
 444         if (unlikely(i != 0))
 445                 dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
 446 }
 447
 448 static void msi2500_iso_stop(struct msi2500_dev *dev)
 449 {
 450         int i;
 451
 452         dev_dbg(dev->dev, "\n");
 453
 454         /* Unlinking ISOC buffers one by one */
 455         for (i = 0; i < MAX_ISO_BUFS; i++) {
 456                 if (dev->urbs[i]) {
 457                         dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
 458                         usb_kill_urb(dev->urbs[i]);
 459                 }
 460         }
 461 }
 462
 463 static void msi2500_iso_free(struct msi2500_dev *dev)
 464 {
 465         int i;
 466
 467         dev_dbg(dev->dev, "\n");
 468
 469         /* Freeing ISOC buffers one by one */
 470         for (i = 0; i < MAX_ISO_BUFS; i++) {
 471                 if (dev->urbs[i]) {
 472                         dev_dbg(dev->dev, "Freeing URB\n");
 473                         if (dev->urbs[i]->transfer_buffer) {
 474                                 usb_free_coherent(dev->udev,
 475                                         dev->urbs[i]->transfer_buffer_length,
 476                                         dev->urbs[i]->transfer_buffer,
 477                                         dev->urbs[i]->transfer_dma);
 478                         }
 479                         usb_free_urb(dev->urbs[i]);
 480                         dev->urbs[i] = NULL;
 481                 }
 482         }
 483 }
 484
 485 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 486 static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
 487 {
 488         dev_dbg(dev->dev, "\n");
 489
 490         msi2500_iso_stop(dev);
 491         msi2500_iso_free(dev);
 492 }
 493
 494 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 495 static int msi2500_isoc_init(struct msi2500_dev *dev)
 496 {
 497         struct urb *urb;
 498         int i, j, ret;
 499
 500         dev_dbg(dev->dev, "\n");
 501
 502         dev->isoc_errors = 0;
 503
 504         ret = usb_set_interface(dev->udev, 0, 1);
 505         if (ret)
 506                 return ret;
 507
 508         /* Allocate and init Isochronuous urbs */
 509         for (i = 0; i < MAX_ISO_BUFS; i++) {
 510                 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 511                 if (urb == NULL) {
 512                         msi2500_isoc_cleanup(dev);
 513                         return -ENOMEM;
 514                 }
 515                 dev->urbs[i] = urb;
 516                 dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
 517
 518                 urb->interval = 1;
 519                 urb->dev = dev->udev;
 520                 urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
 521                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 522                 urb->transfer_buffer = usb_alloc_coherent(dev->udev,
 523                                 ISO_BUFFER_SIZE,
 524                                 GFP_KERNEL, &urb->transfer_dma);
 525                 if (urb->transfer_buffer == NULL) {
 526                         dev_err(dev->dev,
 527                                 "Failed to allocate urb buffer %d\n", i);
 528                         msi2500_isoc_cleanup(dev);
 529                         return -ENOMEM;
 530                 }
 531                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 532                 urb->complete = msi2500_isoc_handler;
 533                 urb->context = dev;
 534                 urb->start_frame = 0;
 535                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 536                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 537                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 538                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 539                 }
 540         }
 541
 542         /* link */
 543         for (i = 0; i < MAX_ISO_BUFS; i++) {
 544                 ret = usb_submit_urb(dev->urbs[i], GFP_KERNEL);
 545                 if (ret) {
 546                         dev_err(dev->dev,
 547                                 "usb_submit_urb %d failed with error %d\n",
 548                                 i, ret);
 549                         msi2500_isoc_cleanup(dev);
 550                         return ret;
 551                 }
 552                 dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
 553         }
 554
 555         /* All is done... */
 556         return 0;
 557 }
 558
 559 /* Must be called with vb_queue_lock hold */
 560 static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
 561 {
 562         unsigned long flags;
 563
 564         dev_dbg(dev->dev, "\n");
 565
 566         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 567         while (!list_empty(&dev->queued_bufs)) {
 568                 struct msi2500_frame_buf *buf;
 569
 570                 buf = list_entry(dev->queued_bufs.next,
 571                                  struct msi2500_frame_buf, list);
 572                 list_del(&buf->list);
 573                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 574         }
 575         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 576 }
 577
 578 /* The user yanked out the cable... */
 579 static void msi2500_disconnect(struct usb_interface *intf)
 580 {
 581         struct v4l2_device *v = usb_get_intfdata(intf);
 582         struct msi2500_dev *dev =
 583                         container_of(v, struct msi2500_dev, v4l2_dev);
 584
 585         dev_dbg(dev->dev, "\n");
 586
 587         mutex_lock(&dev->vb_queue_lock);
 588         mutex_lock(&dev->v4l2_lock);
 589         /* No need to keep the urbs around after disconnection */
 590         dev->udev = NULL;
 591         v4l2_device_disconnect(&dev->v4l2_dev);
 592         video_unregister_device(&dev->vdev);
 593         spi_unregister_master(dev->master);
 594         mutex_unlock(&dev->v4l2_lock);
 595         mutex_unlock(&dev->vb_queue_lock);
 596
 597         v4l2_device_put(&dev->v4l2_dev);
 598 }
 599
 600 static int msi2500_querycap(struct file *file, void *fh,
 601                             struct v4l2_capability *cap)
 602 {
 603         struct msi2500_dev *dev = video_drvdata(file);
 604
 605         dev_dbg(dev->dev, "\n");
 606
 607         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 608         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 609         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 610         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
 611                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
 612         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 613         return 0;
 614 }
 615
 616 /* Videobuf2 operations */
 617 static int msi2500_queue_setup(struct vb2_queue *vq,
 618                                unsigned int *nbuffers,
 619                                unsigned int *nplanes, unsigned int sizes[],
 620                                struct device *alloc_devs[])
 621 {
 622         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 623
 624         dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
 625
 626         /* Absolute min and max number of buffers available for mmap() */
 627         *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
 628         *nplanes = 1;
 629         sizes[0] = PAGE_ALIGN(dev->buffersize);
 630         dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 631         return 0;
 632 }
 633
 634 static void msi2500_buf_queue(struct vb2_buffer *vb)
 635 {
 636         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 637         struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 638         struct msi2500_frame_buf *buf = container_of(vbuf,
 639                                                      struct msi2500_frame_buf,
 640                                                      vb);
 641         unsigned long flags;
 642
 643         /* Check the device has not disconnected between prep and queuing */
 644         if (unlikely(!dev->udev)) {
 645                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 646                 return;
 647         }
 648
 649         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 650         list_add_tail(&buf->list, &dev->queued_bufs);
 651         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 652 }
 653
 654 #define CMD_WREG               0x41
 655 #define CMD_START_STREAMING    0x43
 656 #define CMD_STOP_STREAMING     0x45
 657 #define CMD_READ_UNKNOWN       0x48
 658
 659 #define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
 660         char *_direction; \
 661         if (_t & USB_DIR_IN) \
 662                 _direction = "<<<"; \
 663         else \
 664                 _direction = ">>>"; \
 665         dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
 666                         _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
 667                         _l & 0xff, _l >> 8, _direction, _l, _b); \
 668 }
 669
 670 static int msi2500_ctrl_msg(struct msi2500_dev *dev, u8 cmd, u32 data)
 671 {
 672         int ret;
 673         u8 request = cmd;
 674         u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
 675         u16 value = (data >> 0) & 0xffff;
 676         u16 index = (data >> 16) & 0xffff;
 677
 678         msi2500_dbg_usb_control_msg(dev->dev, request, requesttype,
 679                                     value, index, NULL, 0);
 680         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
 681                               requesttype, value, index, NULL, 0, 2000);
 682         if (ret)
 683                 dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
 684                         ret, cmd, data);
 685
 686         return ret;
 687 }
 688
 689 static int msi2500_set_usb_adc(struct msi2500_dev *dev)
 690 {
 691         int ret;
 692         unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
 693         u32 reg3, reg4, reg7;
 694         struct v4l2_ctrl *bandwidth_auto;
 695         struct v4l2_ctrl *bandwidth;
 696
 697         f_sr = dev->f_adc;
 698
 699         /* set tuner, subdev, filters according to sampling rate */
 700         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 701                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 702         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 703                 bandwidth = v4l2_ctrl_find(&dev->hdl,
 704                                 V4L2_CID_RF_TUNER_BANDWIDTH);
 705                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 706         }
 707
 708         /* select stream format */
 709         switch (dev->pixelformat) {
 710         case V4L2_SDR_FMT_CU8:
 711                 reg7 = 0x000c9407; /* 504 */
 712                 break;
 713         case  V4L2_SDR_FMT_CU16LE:
 714                 reg7 = 0x00009407; /* 252 */
 715                 break;
 716         case V4L2_SDR_FMT_CS8:
 717                 reg7 = 0x000c9407; /* 504 */
 718                 break;
 719         case MSI2500_PIX_FMT_SDR_MSI2500_384:
 720                 reg7 = 0x0000a507; /* 384 */
 721                 break;
 722         case MSI2500_PIX_FMT_SDR_S12:
 723                 reg7 = 0x00008507; /* 336 */
 724                 break;
 725         case V4L2_SDR_FMT_CS14LE:
 726                 reg7 = 0x00009407; /* 252 */
 727                 break;
 728         default:
 729                 reg7 = 0x000c9407; /* 504 */
 730                 break;
 731         }
 732
 733         /*
 734          * Fractional-N synthesizer
 735          *
 736          *           +----------------------------------------+
 737          *           v                                        |
 738          *  Fref   +----+     +-------+     +-----+         +------+     +---+
 739          * ------> | PD | --> |  VCO  | --> | /2  | ------> | /N.F | <-- | K |
 740          *         +----+     +-------+     +-----+         +------+     +---+
 741          *                      |
 742          *                      |
 743          *                      v
 744          *                    +-------+     +-----+  Fout
 745          *                    | /Rout | --> | /12 | ------>
 746          *                    +-------+     +-----+
 747          */
 748         /*
 749          * Synthesizer config is just a educated guess...
 750          *
 751          * [7:0]   0x03, register address
 752          * [8]     1, power control
 753          * [9]     ?, power control
 754          * [12:10] output divider
 755          * [13]    0 ?
 756          * [14]    0 ?
 757          * [15]    fractional MSB, bit 20
 758          * [16:19] N
 759          * [23:20] ?
 760          * [24:31] 0x01
 761          *
 762          * output divider
 763          * val   div
 764          *   0     - (invalid)
 765          *   1     4
 766          *   2     6
 767          *   3     8
 768          *   4    10
 769          *   5    12
 770          *   6    14
 771          *   7    16
 772          *
 773          * VCO 202000000 - 720000000++
 774          */
 775
 776         #define F_REF 24000000
 777         #define DIV_PRE_N 2
 778         #define DIV_LO_OUT 12
 779         reg3 = 0x01000303;
 780         reg4 = 0x00000004;
 781
 782         /* XXX: Filters? AGC? VCO band? */
 783         if (f_sr < 6000000)
 784                 reg3 |= 0x1 << 20;
 785         else if (f_sr < 7000000)
 786                 reg3 |= 0x5 << 20;
 787         else if (f_sr < 8500000)
 788                 reg3 |= 0x9 << 20;
 789         else
 790                 reg3 |= 0xd << 20;
 791
 792         for (div_out = 4; div_out < 16; div_out += 2) {
 793                 f_vco = f_sr * div_out * DIV_LO_OUT;
 794                 dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
 795                 if (f_vco >= 202000000)
 796                         break;
 797         }
 798
 799         /* Calculate PLL integer and fractional control word. */
 800         div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
 801         k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
 802
 803         reg3 |= div_n << 16;
 804         reg3 |= (div_out / 2 - 1) << 10;
 805         reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
 806         reg4 |= ((k_cw >>  0) & 0x0fffff) <<  8; /* [19:0] */
 807
 808         dev_dbg(dev->dev,
 809                 "f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
 810                 f_sr, f_vco, div_n, k, div_out, reg3, reg4);
 811
 812         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
 813         if (ret)
 814                 goto err;
 815
 816         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
 817         if (ret)
 818                 goto err;
 819
 820         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
 821         if (ret)
 822                 goto err;
 823
 824         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
 825         if (ret)
 826                 goto err;
 827
 828         ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
 829         if (ret)
 830                 goto err;
 831
 832         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
 833         if (ret)
 834                 goto err;
 835
 836         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
 837         if (ret)
 838                 goto err;
 839
 840         ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
 841 err:
 842         return ret;
 843 }
 844
 845 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
 846 {
 847         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 848         int ret;
 849
 850         dev_dbg(dev->dev, "\n");
 851
 852         if (!dev->udev)
 853                 return -ENODEV;
 854
 855         if (mutex_lock_interruptible(&dev->v4l2_lock))
 856                 return -ERESTARTSYS;
 857
 858         /* wake-up tuner */
 859         v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 860
 861         ret = msi2500_set_usb_adc(dev);
 862
 863         ret = msi2500_isoc_init(dev);
 864         if (ret)
 865                 msi2500_cleanup_queued_bufs(dev);
 866
 867         ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
 868
 869         mutex_unlock(&dev->v4l2_lock);
 870
 871         return ret;
 872 }
 873
 874 static void msi2500_stop_streaming(struct vb2_queue *vq)
 875 {
 876         struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 877
 878         dev_dbg(dev->dev, "\n");
 879
 880         mutex_lock(&dev->v4l2_lock);
 881
 882         if (dev->udev)
 883                 msi2500_isoc_cleanup(dev);
 884
 885         msi2500_cleanup_queued_bufs(dev);
 886
 887         /* according to tests, at least 700us delay is required  */
 888         msleep(20);
 889         if (!msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
 890                 /* sleep USB IF / ADC */
 891                 msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
 892         }
 893
 894         /* sleep tuner */
 895         v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 896
 897         mutex_unlock(&dev->v4l2_lock);
 898 }
 899
 900 static const struct vb2_ops msi2500_vb2_ops = {
 901         .queue_setup            = msi2500_queue_setup,
 902         .buf_queue              = msi2500_buf_queue,
 903         .start_streaming        = msi2500_start_streaming,
 904         .stop_streaming         = msi2500_stop_streaming,
 905         .wait_prepare           = vb2_ops_wait_prepare,
 906         .wait_finish            = vb2_ops_wait_finish,
 907 };
 908
 909 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
 910                                     struct v4l2_fmtdesc *f)
 911 {
 912         struct msi2500_dev *dev = video_drvdata(file);
 913
 914         dev_dbg(dev->dev, "index=%d\n", f->index);
 915
 916         if (f->index >= dev->num_formats)
 917                 return -EINVAL;
 918
 919         strscpy(f->description, formats[f->index].name, sizeof(f->description));
 920         f->pixelformat = formats[f->index].pixelformat;
 921
 922         return 0;
 923 }
 924
 925 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
 926                                  struct v4l2_format *f)
 927 {
 928         struct msi2500_dev *dev = video_drvdata(file);
 929
 930         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 931                 (char *)&dev->pixelformat);
 932
 933         f->fmt.sdr.pixelformat = dev->pixelformat;
 934         f->fmt.sdr.buffersize = dev->buffersize;
 935         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 936
 937         return 0;
 938 }
 939
 940 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
 941                                  struct v4l2_format *f)
 942 {
 943         struct msi2500_dev *dev = video_drvdata(file);
 944         struct vb2_queue *q = &dev->vb_queue;
 945         int i;
 946
 947         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 948                 (char *)&f->fmt.sdr.pixelformat);
 949
 950         if (vb2_is_busy(q))
 951                 return -EBUSY;
 952
 953         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 954         for (i = 0; i < dev->num_formats; i++) {
 955                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 956                         dev->pixelformat = formats[i].pixelformat;
 957                         dev->buffersize = formats[i].buffersize;
 958                         f->fmt.sdr.buffersize = formats[i].buffersize;
 959                         return 0;
 960                 }
 961         }
 962
 963         dev->pixelformat = formats[0].pixelformat;
 964         dev->buffersize = formats[0].buffersize;
 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_try_fmt_sdr_cap(struct file *file, void *priv,
 972                                    struct v4l2_format *f)
 973 {
 974         struct msi2500_dev *dev = video_drvdata(file);
 975         int i;
 976
 977         dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 978                 (char *)&f->fmt.sdr.pixelformat);
 979
 980         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 981         for (i = 0; i < dev->num_formats; i++) {
 982                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 983                         f->fmt.sdr.buffersize = formats[i].buffersize;
 984                         return 0;
 985                 }
 986         }
 987
 988         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 989         f->fmt.sdr.buffersize = formats[0].buffersize;
 990
 991         return 0;
 992 }
 993
 994 static int msi2500_s_tuner(struct file *file, void *priv,
 995                            const struct v4l2_tuner *v)
 996 {
 997         struct msi2500_dev *dev = video_drvdata(file);
 998         int ret;
 999
1000         dev_dbg(dev->dev, "index=%d\n", v->index);
1001
1002         if (v->index == 0)
1003                 ret = 0;
1004         else if (v->index == 1)
1005                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
1006         else
1007                 ret = -EINVAL;
1008
1009         return ret;
1010 }
1011
1012 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
1013 {
1014         struct msi2500_dev *dev = video_drvdata(file);
1015         int ret;
1016
1017         dev_dbg(dev->dev, "index=%d\n", v->index);
1018
1019         if (v->index == 0) {
1020                 strscpy(v->name, "Mirics MSi2500", sizeof(v->name));
1021                 v->type = V4L2_TUNER_ADC;
1022                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1023                 v->rangelow =   1200000;
1024                 v->rangehigh = 15000000;
1025                 ret = 0;
1026         } else if (v->index == 1) {
1027                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1028         } else {
1029                 ret = -EINVAL;
1030         }
1031
1032         return ret;
1033 }
1034
1035 static int msi2500_g_frequency(struct file *file, void *priv,
1036                                struct v4l2_frequency *f)
1037 {
1038         struct msi2500_dev *dev = video_drvdata(file);
1039         int ret  = 0;
1040
1041         dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1042
1043         if (f->tuner == 0) {
1044                 f->frequency = dev->f_adc;
1045                 ret = 0;
1046         } else if (f->tuner == 1) {
1047                 f->type = V4L2_TUNER_RF;
1048                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1049         } else {
1050                 ret = -EINVAL;
1051         }
1052
1053         return ret;
1054 }
1055
1056 static int msi2500_s_frequency(struct file *file, void *priv,
1057                                const struct v4l2_frequency *f)
1058 {
1059         struct msi2500_dev *dev = video_drvdata(file);
1060         int ret;
1061
1062         dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
1063                 f->tuner, f->type, f->frequency);
1064
1065         if (f->tuner == 0) {
1066                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1067                                      bands[0].rangelow,
1068                                      bands[0].rangehigh);
1069                 dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1070                 ret = msi2500_set_usb_adc(dev);
1071         } else if (f->tuner == 1) {
1072                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1073         } else {
1074                 ret = -EINVAL;
1075         }
1076
1077         return ret;
1078 }
1079
1080 static int msi2500_enum_freq_bands(struct file *file, void *priv,
1081                                    struct v4l2_frequency_band *band)
1082 {
1083         struct msi2500_dev *dev = video_drvdata(file);
1084         int ret;
1085
1086         dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
1087                 band->tuner, band->type, band->index);
1088
1089         if (band->tuner == 0) {
1090                 if (band->index >= ARRAY_SIZE(bands)) {
1091                         ret = -EINVAL;
1092                 } else {
1093                         *band = bands[band->index];
1094                         ret = 0;
1095                 }
1096         } else if (band->tuner == 1) {
1097                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner,
1098                                        enum_freq_bands, band);
1099         } else {
1100                 ret = -EINVAL;
1101         }
1102
1103         return ret;
1104 }
1105
1106 static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1107         .vidioc_querycap          = msi2500_querycap,
1108
1109         .vidioc_enum_fmt_sdr_cap  = msi2500_enum_fmt_sdr_cap,
1110         .vidioc_g_fmt_sdr_cap     = msi2500_g_fmt_sdr_cap,
1111         .vidioc_s_fmt_sdr_cap     = msi2500_s_fmt_sdr_cap,
1112         .vidioc_try_fmt_sdr_cap   = msi2500_try_fmt_sdr_cap,
1113
1114         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1115         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1116         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1117         .vidioc_querybuf          = vb2_ioctl_querybuf,
1118         .vidioc_qbuf              = vb2_ioctl_qbuf,
1119         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1120
1121         .vidioc_streamon          = vb2_ioctl_streamon,
1122         .vidioc_streamoff         = vb2_ioctl_streamoff,
1123
1124         .vidioc_g_tuner           = msi2500_g_tuner,
1125         .vidioc_s_tuner           = msi2500_s_tuner,
1126
1127         .vidioc_g_frequency       = msi2500_g_frequency,
1128         .vidioc_s_frequency       = msi2500_s_frequency,
1129         .vidioc_enum_freq_bands   = msi2500_enum_freq_bands,
1130
1131         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1132         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1133         .vidioc_log_status        = v4l2_ctrl_log_status,
1134 };
1135
1136 static const struct v4l2_file_operations msi2500_fops = {
1137         .owner                    = THIS_MODULE,
1138         .open                     = v4l2_fh_open,
1139         .release                  = vb2_fop_release,
1140         .read                     = vb2_fop_read,
1141         .poll                     = vb2_fop_poll,
1142         .mmap                     = vb2_fop_mmap,
1143         .unlocked_ioctl           = video_ioctl2,
1144 };
1145
1146 static const struct video_device msi2500_template = {
1147         .name                     = "Mirics MSi3101 SDR Dongle",
1148         .release                  = video_device_release_empty,
1149         .fops                     = &msi2500_fops,
1150         .ioctl_ops                = &msi2500_ioctl_ops,
1151 };
1152
1153 static void msi2500_video_release(struct v4l2_device *v)
1154 {
1155         struct msi2500_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
1156
1157         v4l2_ctrl_handler_free(&dev->hdl);
1158         v4l2_device_unregister(&dev->v4l2_dev);
1159         kfree(dev);
1160 }
1161
1162 static int msi2500_transfer_one_message(struct spi_master *master,
1163                                         struct spi_message *m)
1164 {
1165         struct msi2500_dev *dev = spi_master_get_devdata(master);
1166         struct spi_transfer *t;
1167         int ret = 0;
1168         u32 data;
1169
1170         list_for_each_entry(t, &m->transfers, transfer_list) {
1171                 dev_dbg(dev->dev, "msg=%*ph\n", t->len, t->tx_buf);
1172                 data = 0x09; /* reg 9 is SPI adapter */
1173                 data |= ((u8 *)t->tx_buf)[0] << 8;
1174                 data |= ((u8 *)t->tx_buf)[1] << 16;
1175                 data |= ((u8 *)t->tx_buf)[2] << 24;
1176                 ret = msi2500_ctrl_msg(dev, CMD_WREG, data);
1177         }
1178
1179         m->status = ret;
1180         spi_finalize_current_message(master);
1181         return ret;
1182 }
1183
1184 static int msi2500_probe(struct usb_interface *intf,
1185                          const struct usb_device_id *id)
1186 {
1187         struct msi2500_dev *dev;
1188         struct v4l2_subdev *sd;
1189         struct spi_master *master;
1190         int ret;
1191         static struct spi_board_info board_info = {
1192                 .modalias               = "msi001",
1193                 .bus_num                = 0,
1194                 .chip_select            = 0,
1195                 .max_speed_hz           = 12000000,
1196         };
1197
1198         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1199         if (!dev) {
1200                 ret = -ENOMEM;
1201                 goto err;
1202         }
1203
1204         mutex_init(&dev->v4l2_lock);
1205         mutex_init(&dev->vb_queue_lock);
1206         spin_lock_init(&dev->queued_bufs_lock);
1207         INIT_LIST_HEAD(&dev->queued_bufs);
1208         dev->dev = &intf->dev;
1209         dev->udev = interface_to_usbdev(intf);
1210         dev->f_adc = bands[0].rangelow;
1211         dev->pixelformat = formats[0].pixelformat;
1212         dev->buffersize = formats[0].buffersize;
1213         dev->num_formats = NUM_FORMATS;
1214         if (!msi2500_emulated_fmt)
1215                 dev->num_formats -= 2;
1216
1217         /* Init videobuf2 queue structure */
1218         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1219         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1220         dev->vb_queue.drv_priv = dev;
1221         dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1222         dev->vb_queue.ops = &msi2500_vb2_ops;
1223         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1224         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1225         ret = vb2_queue_init(&dev->vb_queue);
1226         if (ret) {
1227                 dev_err(dev->dev, "Could not initialize vb2 queue\n");
1228                 goto err_free_mem;
1229         }
1230
1231         /* Init video_device structure */
1232         dev->vdev = msi2500_template;
1233         dev->vdev.queue = &dev->vb_queue;
1234         dev->vdev.queue->lock = &dev->vb_queue_lock;
1235         video_set_drvdata(&dev->vdev, dev);
1236
1237         /* Register the v4l2_device structure */
1238         dev->v4l2_dev.release = msi2500_video_release;
1239         ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1240         if (ret) {
1241                 dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
1242                 goto err_free_mem;
1243         }
1244
1245         /* SPI master adapter */
1246         master = spi_alloc_master(dev->dev, 0);
1247         if (master == NULL) {
1248                 ret = -ENOMEM;
1249                 goto err_unregister_v4l2_dev;
1250         }
1251
1252         dev->master = master;
1253         master->bus_num = 0;
1254         master->num_chipselect = 1;
1255         master->transfer_one_message = msi2500_transfer_one_message;
1256         spi_master_set_devdata(master, dev);
1257         ret = spi_register_master(master);
1258         if (ret) {
1259                 spi_master_put(master);
1260                 goto err_unregister_v4l2_dev;
1261         }
1262
1263         /* load v4l2 subdevice */
1264         sd = v4l2_spi_new_subdev(&dev->v4l2_dev, master, &board_info);
1265         dev->v4l2_subdev = sd;
1266         if (sd == NULL) {
1267                 dev_err(dev->dev, "cannot get v4l2 subdevice\n");
1268                 ret = -ENODEV;
1269                 goto err_unregister_master;
1270         }
1271
1272         /* Register controls */
1273         v4l2_ctrl_handler_init(&dev->hdl, 0);
1274         if (dev->hdl.error) {
1275                 ret = dev->hdl.error;
1276                 dev_err(dev->dev, "Could not initialize controls\n");
1277                 goto err_free_controls;
1278         }
1279
1280         /* currently all controls are from subdev */
1281         v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL, true);
1282
1283         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1284         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1285         dev->vdev.lock = &dev->v4l2_lock;
1286
1287         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1288         if (ret) {
1289                 dev_err(dev->dev,
1290                         "Failed to register as video device (%d)\n", ret);
1291                 goto err_unregister_v4l2_dev;
1292         }
1293         dev_info(dev->dev, "Registered as %s\n",
1294                  video_device_node_name(&dev->vdev));
1295         dev_notice(dev->dev,
1296                    "SDR API is still slightly experimental and functionality changes may follow\n");
1297         return 0;
1298 err_free_controls:
1299         v4l2_ctrl_handler_free(&dev->hdl);
1300 err_unregister_master:
1301         spi_unregister_master(dev->master);
1302 err_unregister_v4l2_dev:
1303         v4l2_device_unregister(&dev->v4l2_dev);
1304 err_free_mem:
1305         kfree(dev);
1306 err:
1307         return ret;
1308 }
1309
1310 /* USB device ID list */
1311 static const struct usb_device_id msi2500_id_table[] = {
1312         {USB_DEVICE(0x1df7, 0x2500)}, /* Mirics MSi3101 SDR Dongle */
1313         {USB_DEVICE(0x2040, 0xd300)}, /* Hauppauge WinTV 133559 LF */
1314         {}
1315 };
1316 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1317
1318 /* USB subsystem interface */
1319 static struct usb_driver msi2500_driver = {
1320         .name                     = KBUILD_MODNAME,
1321         .probe                    = msi2500_probe,
1322         .disconnect               = msi2500_disconnect,
1323         .id_table                 = msi2500_id_table,
1324 };
1325
1326 module_usb_driver(msi2500_driver);
1327
1328 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1329 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1330 MODULE_LICENSE("GPL");