kernel/drivers/media/usb/msi2500/msi2500.c

   1 /*
   2  * Mirics MSi3101 SDR Dongle driver
   3  *
   4  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * That driver is somehow based of pwc driver:
  21  *  (C) 1999-2004 Nemosoft Unv.
  22  *  (C) 2004-2006 Luc Saillard (luc@saillard.org)
  23  *  (C) 2011 Hans de Goede <hdegoede@redhat.com>
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <asm/div64.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-ioctl.h>
  31 #include <media/v4l2-ctrls.h>
  32 #include <media/v4l2-event.h>
  33 #include <linux/usb.h>
  34 #include <media/videobuf2-vmalloc.h>
  35 #include <linux/spi/spi.h>
  36
  37 static bool msi2500_emulated_fmt;
  38 module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
  39 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  40
  41 /*
  42  *   iConfiguration          0
  43  *     bInterfaceNumber        0
  44  *     bAlternateSetting       1
  45  *     bNumEndpoints           1
  46  *       bEndpointAddress     0x81  EP 1 IN
  47  *       bmAttributes            1
  48  *         Transfer Type            Isochronous
  49  *       wMaxPacketSize     0x1400  3x 1024 bytes
  50  *       bInterval               1
  51  */
  52 #define MAX_ISO_BUFS            (8)
  53 #define ISO_FRAMES_PER_DESC     (8)
  54 #define ISO_MAX_FRAME_SIZE      (3 * 1024)
  55 #define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  56 #define MAX_ISOC_ERRORS         20
  57
  58 /*
  59  * TODO: These formats should be moved to V4L2 API. Formats are currently
  60  * disabled from formats[] table, not visible to userspace.
  61  */
  62  /* signed 12-bit */
  63 #define MSI2500_PIX_FMT_SDR_S12         v4l2_fourcc('D', 'S', '1', '2')
  64 /* Mirics MSi2500 format 384 */
  65 #define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
  66
  67 static const struct v4l2_frequency_band bands[] = {
  68         {
  69                 .tuner = 0,
  70                 .type = V4L2_TUNER_ADC,
  71                 .index = 0,
  72                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  73                 .rangelow   =  1200000,
  74                 .rangehigh  = 15000000,
  75         },
  76 };
  77
  78 /* stream formats */
  79 struct msi2500_format {
  80         char    *name;
  81         u32     pixelformat;
  82         u32     buffersize;
  83 };
  84
  85 /* format descriptions for capture and preview */
  86 static struct msi2500_format formats[] = {
  87         {
  88                 .name           = "Complex S8",
  89                 .pixelformat    = V4L2_SDR_FMT_CS8,
  90                 .buffersize     = 3 * 1008,
  91 #if 0
  92         }, {
  93                 .name           = "10+2-bit signed",
  94                 .pixelformat    = MSI2500_PIX_FMT_SDR_MSI2500_384,
  95         }, {
  96                 .name           = "12-bit signed",
  97                 .pixelformat    = MSI2500_PIX_FMT_SDR_S12,
  98 #endif
  99         }, {
 100                 .name           = "Complex S14LE",
 101                 .pixelformat    = V4L2_SDR_FMT_CS14LE,
 102                 .buffersize     = 3 * 1008,
 103         }, {
 104                 .name           = "Complex U8 (emulated)",
 105                 .pixelformat    = V4L2_SDR_FMT_CU8,
 106                 .buffersize     = 3 * 1008,
 107         }, {
 108                 .name           = "Complex U16LE (emulated)",
 109                 .pixelformat    =  V4L2_SDR_FMT_CU16LE,
 110                 .buffersize     = 3 * 1008,
 111         },
 112 };
 113
 114 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
 115
 116 /* intermediate buffers with raw data from the USB device */
 117 struct msi2500_frame_buf {
 118         struct vb2_buffer vb;   /* common v4l buffer stuff -- must be first */
 119         struct list_head list;
 120 };
 121
 122 struct msi2500_state {
 123         struct device *dev;
 124         struct video_device vdev;
 125         struct v4l2_device v4l2_dev;
 126         struct v4l2_subdev *v4l2_subdev;
 127         struct spi_master *master;
 128
 129         /* videobuf2 queue and queued buffers list */
 130         struct vb2_queue vb_queue;
 131         struct list_head queued_bufs;
 132         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 133
 134         /* Note if taking both locks v4l2_lock must always be locked first! */
 135         struct mutex v4l2_lock;      /* Protects everything else */
 136         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 137
 138         /* Pointer to our usb_device, will be NULL after unplug */
 139         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 140
 141         unsigned int f_adc;
 142         u32 pixelformat;
 143         u32 buffersize;
 144         unsigned int num_formats;
 145
 146         unsigned int isoc_errors; /* number of contiguous ISOC errors */
 147         unsigned int vb_full; /* vb is full and packets dropped */
 148
 149         struct urb *urbs[MAX_ISO_BUFS];
 150
 151         /* Controls */
 152         struct v4l2_ctrl_handler hdl;
 153
 154         u32 next_sample; /* for track lost packets */
 155         u32 sample; /* for sample rate calc */
 156         unsigned long jiffies_next;
 157 };
 158
 159 /* Private functions */
 160 static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
 161                 struct msi2500_state *s)
 162 {
 163         unsigned long flags;
 164         struct msi2500_frame_buf *buf = NULL;
 165
 166         spin_lock_irqsave(&s->queued_bufs_lock, flags);
 167         if (list_empty(&s->queued_bufs))
 168                 goto leave;
 169
 170         buf = list_entry(s->queued_bufs.next, struct msi2500_frame_buf, list);
 171         list_del(&buf->list);
 172 leave:
 173         spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
 174         return buf;
 175 }
 176
 177 /*
 178  * +===========================================================================
 179  * |   00-1023 | USB packet type '504'
 180  * +===========================================================================
 181  * |   00-  03 | sequence number of first sample in that USB packet
 182  * +---------------------------------------------------------------------------
 183  * |   04-  15 | garbage
 184  * +---------------------------------------------------------------------------
 185  * |   16-1023 | samples
 186  * +---------------------------------------------------------------------------
 187  * signed 8-bit sample
 188  * 504 * 2 = 1008 samples
 189  *
 190  *
 191  * +===========================================================================
 192  * |   00-1023 | USB packet type '384'
 193  * +===========================================================================
 194  * |   00-  03 | sequence number of first sample in that USB packet
 195  * +---------------------------------------------------------------------------
 196  * |   04-  15 | garbage
 197  * +---------------------------------------------------------------------------
 198  * |   16- 175 | samples
 199  * +---------------------------------------------------------------------------
 200  * |  176- 179 | control bits for previous samples
 201  * +---------------------------------------------------------------------------
 202  * |  180- 339 | samples
 203  * +---------------------------------------------------------------------------
 204  * |  340- 343 | control bits for previous samples
 205  * +---------------------------------------------------------------------------
 206  * |  344- 503 | samples
 207  * +---------------------------------------------------------------------------
 208  * |  504- 507 | control bits for previous samples
 209  * +---------------------------------------------------------------------------
 210  * |  508- 667 | samples
 211  * +---------------------------------------------------------------------------
 212  * |  668- 671 | control bits for previous samples
 213  * +---------------------------------------------------------------------------
 214  * |  672- 831 | samples
 215  * +---------------------------------------------------------------------------
 216  * |  832- 835 | control bits for previous samples
 217  * +---------------------------------------------------------------------------
 218  * |  836- 995 | samples
 219  * +---------------------------------------------------------------------------
 220  * |  996- 999 | control bits for previous samples
 221  * +---------------------------------------------------------------------------
 222  * | 1000-1023 | garbage
 223  * +---------------------------------------------------------------------------
 224  *
 225  * Bytes 4 - 7 could have some meaning?
 226  *
 227  * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
 228  * numbers. This results one 2-bit number for 8 samples. It is likely used for
 229  * for bit shifting sample by given bits, increasing actual sampling resolution.
 230  * Number 2 (0b10) was never seen.
 231  *
 232  * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
 233  *
 234  *
 235  * +===========================================================================
 236  * |   00-1023 | USB packet type '336'
 237  * +===========================================================================
 238  * |   00-  03 | sequence number of first sample in that USB packet
 239  * +---------------------------------------------------------------------------
 240  * |   04-  15 | garbage
 241  * +---------------------------------------------------------------------------
 242  * |   16-1023 | samples
 243  * +---------------------------------------------------------------------------
 244  * signed 12-bit sample
 245  *
 246  *
 247  * +===========================================================================
 248  * |   00-1023 | USB packet type '252'
 249  * +===========================================================================
 250  * |   00-  03 | sequence number of first sample in that USB packet
 251  * +---------------------------------------------------------------------------
 252  * |   04-  15 | garbage
 253  * +---------------------------------------------------------------------------
 254  * |   16-1023 | samples
 255  * +---------------------------------------------------------------------------
 256  * signed 14-bit sample
 257  */
 258
 259 static int msi2500_convert_stream(struct msi2500_state *s, u8 *dst, u8 *src,
 260                 unsigned int src_len)
 261 {
 262         unsigned int i, j, transactions, dst_len = 0;
 263         u32 sample[3];
 264
 265         /* There could be 1-3 1024 byte transactions per packet */
 266         transactions = src_len / 1024;
 267
 268         for (i = 0; i < transactions; i++) {
 269                 sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
 270                                 src[0] << 0;
 271                 if (i == 0 && s->next_sample != sample[0]) {
 272                         dev_dbg_ratelimited(s->dev,
 273                                         "%d samples lost, %d %08x:%08x\n",
 274                                         sample[0] - s->next_sample,
 275                                         src_len, s->next_sample, 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(s->dev, "%*ph\n", 12, &src[4]);
 283
 284                 src += 16; /* skip header */
 285
 286                 switch (s->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                         s->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                         s->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(s->dev, "%*ph\n", 24, &src[1000]);
 326                         memcpy(dst, src, 984);
 327                         src += 984 + 24;
 328                         dst += 984;
 329                         dst_len += 984;
 330                         s->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                         s->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                         s->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                         s->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(s->jiffies_next))) {
 360                 #define MSECS 10000UL
 361                 unsigned int msecs = jiffies_to_msecs(jiffies -
 362                                 s->jiffies_next + msecs_to_jiffies(MSECS));
 363                 unsigned int samples = s->next_sample - s->sample;
 364
 365                 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 366                 s->sample = s->next_sample;
 367                 dev_dbg(s->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_state *s = (struct msi2500_state *)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 || urb->status == -ECONNRESET ||
 387                         urb->status == -ESHUTDOWN)) {
 388                 dev_dbg(s->dev, "URB (%p) unlinked %ssynchronuously\n",
 389                                 urb, urb->status == -ENOENT ? "" : "a");
 390                 return;
 391         }
 392
 393         if (unlikely(urb->status != 0)) {
 394                 dev_dbg(s->dev, "called with status %d\n", urb->status);
 395                 /* Give up after a number of contiguous errors */
 396                 if (++s->isoc_errors > MAX_ISOC_ERRORS)
 397                         dev_dbg(s->dev, "Too many ISOC errors, bailing out\n");
 398                 goto handler_end;
 399         } else {
 400                 /* Reset ISOC error counter. We did get here, after all. */
 401                 s->isoc_errors = 0;
 402         }
 403
 404         /* Compact data */
 405         for (i = 0; i < urb->number_of_packets; i++) {
 406                 void *ptr;
 407
 408                 /* Check frame error */
 409                 fstatus = urb->iso_frame_desc[i].status;
 410                 if (unlikely(fstatus)) {
 411                         dev_dbg_ratelimited(s->dev,
 412                                         "frame=%d/%d has error %d skipping\n",
 413                                         i, urb->number_of_packets, fstatus);
 414                         continue;
 415                 }
 416
 417                 /* Check if that frame contains data */
 418                 flen = urb->iso_frame_desc[i].actual_length;
 419                 if (unlikely(flen == 0))
 420                         continue;
 421
 422                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 423
 424                 /* Get free framebuffer */
 425                 fbuf = msi2500_get_next_fill_buf(s);
 426                 if (unlikely(fbuf == NULL)) {
 427                         s->vb_full++;
 428                         dev_dbg_ratelimited(s->dev,
 429                                         "videobuf is full, %d packets dropped\n",
 430                                         s->vb_full);
 431                         continue;
 432                 }
 433
 434                 /* fill framebuffer */
 435                 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
 436                 flen = msi2500_convert_stream(s, ptr, iso_buf, flen);
 437                 vb2_set_plane_payload(&fbuf->vb, 0, flen);
 438                 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
 439         }
 440
 441 handler_end:
 442         i = usb_submit_urb(urb, GFP_ATOMIC);
 443         if (unlikely(i != 0))
 444                 dev_dbg(s->dev, "Error (%d) re-submitting urb\n", i);
 445 }
 446
 447 static void msi2500_iso_stop(struct msi2500_state *s)
 448 {
 449         int i;
 450
 451         dev_dbg(s->dev, "\n");
 452
 453         /* Unlinking ISOC buffers one by one */
 454         for (i = 0; i < MAX_ISO_BUFS; i++) {
 455                 if (s->urbs[i]) {
 456                         dev_dbg(s->dev, "Unlinking URB %p\n", s->urbs[i]);
 457                         usb_kill_urb(s->urbs[i]);
 458                 }
 459         }
 460 }
 461
 462 static void msi2500_iso_free(struct msi2500_state *s)
 463 {
 464         int i;
 465
 466         dev_dbg(s->dev, "\n");
 467
 468         /* Freeing ISOC buffers one by one */
 469         for (i = 0; i < MAX_ISO_BUFS; i++) {
 470                 if (s->urbs[i]) {
 471                         dev_dbg(s->dev, "Freeing URB\n");
 472                         if (s->urbs[i]->transfer_buffer) {
 473                                 usb_free_coherent(s->udev,
 474                                         s->urbs[i]->transfer_buffer_length,
 475                                         s->urbs[i]->transfer_buffer,
 476                                         s->urbs[i]->transfer_dma);
 477                         }
 478                         usb_free_urb(s->urbs[i]);
 479                         s->urbs[i] = NULL;
 480                 }
 481         }
 482 }
 483
 484 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 485 static void msi2500_isoc_cleanup(struct msi2500_state *s)
 486 {
 487         dev_dbg(s->dev, "\n");
 488
 489         msi2500_iso_stop(s);
 490         msi2500_iso_free(s);
 491 }
 492
 493 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 494 static int msi2500_isoc_init(struct msi2500_state *s)
 495 {
 496         struct urb *urb;
 497         int i, j, ret;
 498
 499         dev_dbg(s->dev, "\n");
 500
 501         s->isoc_errors = 0;
 502
 503         ret = usb_set_interface(s->udev, 0, 1);
 504         if (ret)
 505                 return ret;
 506
 507         /* Allocate and init Isochronuous urbs */
 508         for (i = 0; i < MAX_ISO_BUFS; i++) {
 509                 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 510                 if (urb == NULL) {
 511                         dev_err(s->dev, "Failed to allocate urb %d\n", i);
 512                         msi2500_isoc_cleanup(s);
 513                         return -ENOMEM;
 514                 }
 515                 s->urbs[i] = urb;
 516                 dev_dbg(s->dev, "Allocated URB at 0x%p\n", urb);
 517
 518                 urb->interval = 1;
 519                 urb->dev = s->udev;
 520                 urb->pipe = usb_rcvisocpipe(s->udev, 0x81);
 521                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 522                 urb->transfer_buffer = usb_alloc_coherent(s->udev,
 523                                 ISO_BUFFER_SIZE,
 524                                 GFP_KERNEL, &urb->transfer_dma);
 525                 if (urb->transfer_buffer == NULL) {
 526                         dev_err(s->dev, "Failed to allocate urb buffer %d\n",
 527                                         i);
 528                         msi2500_isoc_cleanup(s);
 529                         return -ENOMEM;
 530                 }
 531                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 532                 urb->complete = msi2500_isoc_handler;
 533                 urb->context = s;
 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(s->urbs[i], GFP_KERNEL);
 545                 if (ret) {
 546                         dev_err(s->dev, "usb_submit_urb %d failed with error %d\n",
 547                                         i, ret);
 548                         msi2500_isoc_cleanup(s);
 549                         return ret;
 550                 }
 551                 dev_dbg(s->dev, "URB 0x%p submitted.\n", s->urbs[i]);
 552         }
 553
 554         /* All is done... */
 555         return 0;
 556 }
 557
 558 /* Must be called with vb_queue_lock hold */
 559 static void msi2500_cleanup_queued_bufs(struct msi2500_state *s)
 560 {
 561         unsigned long flags;
 562
 563         dev_dbg(s->dev, "\n");
 564
 565         spin_lock_irqsave(&s->queued_bufs_lock, flags);
 566         while (!list_empty(&s->queued_bufs)) {
 567                 struct msi2500_frame_buf *buf;
 568
 569                 buf = list_entry(s->queued_bufs.next, struct msi2500_frame_buf,
 570                                  list);
 571                 list_del(&buf->list);
 572                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 573         }
 574         spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
 575 }
 576
 577 /* The user yanked out the cable... */
 578 static void msi2500_disconnect(struct usb_interface *intf)
 579 {
 580         struct v4l2_device *v = usb_get_intfdata(intf);
 581         struct msi2500_state *s =
 582                         container_of(v, struct msi2500_state, v4l2_dev);
 583
 584         dev_dbg(s->dev, "\n");
 585
 586         mutex_lock(&s->vb_queue_lock);
 587         mutex_lock(&s->v4l2_lock);
 588         /* No need to keep the urbs around after disconnection */
 589         s->udev = NULL;
 590         v4l2_device_disconnect(&s->v4l2_dev);
 591         video_unregister_device(&s->vdev);
 592         spi_unregister_master(s->master);
 593         mutex_unlock(&s->v4l2_lock);
 594         mutex_unlock(&s->vb_queue_lock);
 595
 596         v4l2_device_put(&s->v4l2_dev);
 597 }
 598
 599 static int msi2500_querycap(struct file *file, void *fh,
 600                 struct v4l2_capability *cap)
 601 {
 602         struct msi2500_state *s = video_drvdata(file);
 603
 604         dev_dbg(s->dev, "\n");
 605
 606         strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 607         strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
 608         usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
 609         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
 610                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
 611         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 612         return 0;
 613 }
 614
 615 /* Videobuf2 operations */
 616 static int msi2500_queue_setup(struct vb2_queue *vq,
 617                 const struct v4l2_format *fmt, unsigned int *nbuffers,
 618                 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 619 {
 620         struct msi2500_state *s = vb2_get_drv_priv(vq);
 621
 622         dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers);
 623
 624         /* Absolute min and max number of buffers available for mmap() */
 625         *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
 626         *nplanes = 1;
 627         sizes[0] = PAGE_ALIGN(s->buffersize);
 628         dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 629         return 0;
 630 }
 631
 632 static void msi2500_buf_queue(struct vb2_buffer *vb)
 633 {
 634         struct msi2500_state *s = vb2_get_drv_priv(vb->vb2_queue);
 635         struct msi2500_frame_buf *buf =
 636                         container_of(vb, struct msi2500_frame_buf, vb);
 637         unsigned long flags;
 638
 639         /* Check the device has not disconnected between prep and queuing */
 640         if (unlikely(!s->udev)) {
 641                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 642                 return;
 643         }
 644
 645         spin_lock_irqsave(&s->queued_bufs_lock, flags);
 646         list_add_tail(&buf->list, &s->queued_bufs);
 647         spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
 648 }
 649
 650 #define CMD_WREG               0x41
 651 #define CMD_START_STREAMING    0x43
 652 #define CMD_STOP_STREAMING     0x45
 653 #define CMD_READ_UNKNOW        0x48
 654
 655 #define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
 656         char *_direction; \
 657         if (_t & USB_DIR_IN) \
 658                 _direction = "<<<"; \
 659         else \
 660                 _direction = ">>>"; \
 661         dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
 662                         _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
 663                         _l & 0xff, _l >> 8, _direction, _l, _b); \
 664 }
 665
 666 static int msi2500_ctrl_msg(struct msi2500_state *s, u8 cmd, u32 data)
 667 {
 668         int ret;
 669         u8 request = cmd;
 670         u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
 671         u16 value = (data >> 0) & 0xffff;
 672         u16 index = (data >> 16) & 0xffff;
 673
 674         msi2500_dbg_usb_control_msg(s->dev,
 675                         request, requesttype, value, index, NULL, 0);
 676         ret = usb_control_msg(s->udev, usb_sndctrlpipe(s->udev, 0),
 677                         request, requesttype, value, index, NULL, 0, 2000);
 678         if (ret)
 679                 dev_err(s->dev, "failed %d, cmd %02x, data %04x\n",
 680                                 ret, cmd, data);
 681
 682         return ret;
 683 }
 684
 685 #define F_REF 24000000
 686 #define DIV_R_IN 2
 687 static int msi2500_set_usb_adc(struct msi2500_state *s)
 688 {
 689         int ret, div_n, div_m, div_r_out, f_sr, f_vco, fract;
 690         u32 reg3, reg4, reg7;
 691         struct v4l2_ctrl *bandwidth_auto;
 692         struct v4l2_ctrl *bandwidth;
 693
 694         f_sr = s->f_adc;
 695
 696         /* set tuner, subdev, filters according to sampling rate */
 697         bandwidth_auto = v4l2_ctrl_find(&s->hdl,
 698                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 699         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 700                 bandwidth = v4l2_ctrl_find(&s->hdl,
 701                                 V4L2_CID_RF_TUNER_BANDWIDTH);
 702                 v4l2_ctrl_s_ctrl(bandwidth, s->f_adc);
 703         }
 704
 705         /* select stream format */
 706         switch (s->pixelformat) {
 707         case V4L2_SDR_FMT_CU8:
 708                 reg7 = 0x000c9407; /* 504 */
 709                 break;
 710         case  V4L2_SDR_FMT_CU16LE:
 711                 reg7 = 0x00009407; /* 252 */
 712                 break;
 713         case V4L2_SDR_FMT_CS8:
 714                 reg7 = 0x000c9407; /* 504 */
 715                 break;
 716         case MSI2500_PIX_FMT_SDR_MSI2500_384:
 717                 reg7 = 0x0000a507; /* 384 */
 718                 break;
 719         case MSI2500_PIX_FMT_SDR_S12:
 720                 reg7 = 0x00008507; /* 336 */
 721                 break;
 722         case V4L2_SDR_FMT_CS14LE:
 723                 reg7 = 0x00009407; /* 252 */
 724                 break;
 725         default:
 726                 reg7 = 0x000c9407; /* 504 */
 727                 break;
 728         }
 729
 730         /*
 731          * Synthesizer config is just a educated guess...
 732          *
 733          * [7:0]   0x03, register address
 734          * [8]     1, power control
 735          * [9]     ?, power control
 736          * [12:10] output divider
 737          * [13]    0 ?
 738          * [14]    0 ?
 739          * [15]    fractional MSB, bit 20
 740          * [16:19] N
 741          * [23:20] ?
 742          * [24:31] 0x01
 743          *
 744          * output divider
 745          * val   div
 746          *   0     - (invalid)
 747          *   1     4
 748          *   2     6
 749          *   3     8
 750          *   4    10
 751          *   5    12
 752          *   6    14
 753          *   7    16
 754          *
 755          * VCO 202000000 - 720000000++
 756          */
 757         reg3 = 0x01000303;
 758         reg4 = 0x00000004;
 759
 760         /* XXX: Filters? AGC? */
 761         if (f_sr < 6000000)
 762                 reg3 |= 0x1 << 20;
 763         else if (f_sr < 7000000)
 764                 reg3 |= 0x5 << 20;
 765         else if (f_sr < 8500000)
 766                 reg3 |= 0x9 << 20;
 767         else
 768                 reg3 |= 0xd << 20;
 769
 770         for (div_r_out = 4; div_r_out < 16; div_r_out += 2) {
 771                 f_vco = f_sr * div_r_out * 12;
 772                 dev_dbg(s->dev, "div_r_out=%d f_vco=%d\n", div_r_out, f_vco);
 773                 if (f_vco >= 202000000)
 774                         break;
 775         }
 776
 777         div_n = f_vco / (F_REF * DIV_R_IN);
 778         div_m = f_vco % (F_REF * DIV_R_IN);
 779         fract = 0x200000ul * div_m / (F_REF * DIV_R_IN);
 780
 781         reg3 |= div_n << 16;
 782         reg3 |= (div_r_out / 2 - 1) << 10;
 783         reg3 |= ((fract >> 20) & 0x000001) << 15; /* [20] */
 784         reg4 |= ((fract >>  0) & 0x0fffff) <<  8; /* [19:0] */
 785
 786         dev_dbg(s->dev, "f_sr=%d f_vco=%d div_n=%d div_m=%d div_r_out=%d reg3=%08x reg4=%08x\n",
 787                         f_sr, f_vco, div_n, div_m, div_r_out, reg3, reg4);
 788
 789         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00608008);
 790         if (ret)
 791                 goto err;
 792
 793         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00000c05);
 794         if (ret)
 795                 goto err;
 796
 797         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00020000);
 798         if (ret)
 799                 goto err;
 800
 801         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00480102);
 802         if (ret)
 803                 goto err;
 804
 805         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00f38008);
 806         if (ret)
 807                 goto err;
 808
 809         ret = msi2500_ctrl_msg(s, CMD_WREG, reg7);
 810         if (ret)
 811                 goto err;
 812
 813         ret = msi2500_ctrl_msg(s, CMD_WREG, reg4);
 814         if (ret)
 815                 goto err;
 816
 817         ret = msi2500_ctrl_msg(s, CMD_WREG, reg3);
 818         if (ret)
 819                 goto err;
 820 err:
 821         return ret;
 822 }
 823
 824 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
 825 {
 826         struct msi2500_state *s = vb2_get_drv_priv(vq);
 827         int ret;
 828
 829         dev_dbg(s->dev, "\n");
 830
 831         if (!s->udev)
 832                 return -ENODEV;
 833
 834         if (mutex_lock_interruptible(&s->v4l2_lock))
 835                 return -ERESTARTSYS;
 836
 837         /* wake-up tuner */
 838         v4l2_subdev_call(s->v4l2_subdev, core, s_power, 1);
 839
 840         ret = msi2500_set_usb_adc(s);
 841
 842         ret = msi2500_isoc_init(s);
 843         if (ret)
 844                 msi2500_cleanup_queued_bufs(s);
 845
 846         ret = msi2500_ctrl_msg(s, CMD_START_STREAMING, 0);
 847
 848         mutex_unlock(&s->v4l2_lock);
 849
 850         return ret;
 851 }
 852
 853 static void msi2500_stop_streaming(struct vb2_queue *vq)
 854 {
 855         struct msi2500_state *s = vb2_get_drv_priv(vq);
 856
 857         dev_dbg(s->dev, "\n");
 858
 859         mutex_lock(&s->v4l2_lock);
 860
 861         if (s->udev)
 862                 msi2500_isoc_cleanup(s);
 863
 864         msi2500_cleanup_queued_bufs(s);
 865
 866         /* according to tests, at least 700us delay is required  */
 867         msleep(20);
 868         if (!msi2500_ctrl_msg(s, CMD_STOP_STREAMING, 0)) {
 869                 /* sleep USB IF / ADC */
 870                 msi2500_ctrl_msg(s, CMD_WREG, 0x01000003);
 871         }
 872
 873         /* sleep tuner */
 874         v4l2_subdev_call(s->v4l2_subdev, core, s_power, 0);
 875
 876         mutex_unlock(&s->v4l2_lock);
 877 }
 878
 879 static struct vb2_ops msi2500_vb2_ops = {
 880         .queue_setup            = msi2500_queue_setup,
 881         .buf_queue              = msi2500_buf_queue,
 882         .start_streaming        = msi2500_start_streaming,
 883         .stop_streaming         = msi2500_stop_streaming,
 884         .wait_prepare           = vb2_ops_wait_prepare,
 885         .wait_finish            = vb2_ops_wait_finish,
 886 };
 887
 888 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
 889                 struct v4l2_fmtdesc *f)
 890 {
 891         struct msi2500_state *s = video_drvdata(file);
 892
 893         dev_dbg(s->dev, "index=%d\n", f->index);
 894
 895         if (f->index >= s->num_formats)
 896                 return -EINVAL;
 897
 898         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
 899         f->pixelformat = formats[f->index].pixelformat;
 900
 901         return 0;
 902 }
 903
 904 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
 905                 struct v4l2_format *f)
 906 {
 907         struct msi2500_state *s = video_drvdata(file);
 908
 909         dev_dbg(s->dev, "pixelformat fourcc %4.4s\n",
 910                         (char *)&s->pixelformat);
 911
 912         f->fmt.sdr.pixelformat = s->pixelformat;
 913         f->fmt.sdr.buffersize = s->buffersize;
 914         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 915
 916         return 0;
 917 }
 918
 919 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
 920                 struct v4l2_format *f)
 921 {
 922         struct msi2500_state *s = video_drvdata(file);
 923         struct vb2_queue *q = &s->vb_queue;
 924         int i;
 925
 926         dev_dbg(s->dev, "pixelformat fourcc %4.4s\n",
 927                         (char *)&f->fmt.sdr.pixelformat);
 928
 929         if (vb2_is_busy(q))
 930                 return -EBUSY;
 931
 932         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 933         for (i = 0; i < s->num_formats; i++) {
 934                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 935                         s->pixelformat = formats[i].pixelformat;
 936                         s->buffersize = formats[i].buffersize;
 937                         f->fmt.sdr.buffersize = formats[i].buffersize;
 938                         return 0;
 939                 }
 940         }
 941
 942         s->pixelformat = formats[0].pixelformat;
 943         s->buffersize = formats[0].buffersize;
 944         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 945         f->fmt.sdr.buffersize = formats[0].buffersize;
 946
 947         return 0;
 948 }
 949
 950 static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
 951                 struct v4l2_format *f)
 952 {
 953         struct msi2500_state *s = video_drvdata(file);
 954         int i;
 955
 956         dev_dbg(s->dev, "pixelformat fourcc %4.4s\n",
 957                         (char *)&f->fmt.sdr.pixelformat);
 958
 959         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 960         for (i = 0; i < s->num_formats; i++) {
 961                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 962                         f->fmt.sdr.buffersize = formats[i].buffersize;
 963                         return 0;
 964                 }
 965         }
 966
 967         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 968         f->fmt.sdr.buffersize = formats[0].buffersize;
 969
 970         return 0;
 971 }
 972
 973 static int msi2500_s_tuner(struct file *file, void *priv,
 974                 const struct v4l2_tuner *v)
 975 {
 976         struct msi2500_state *s = video_drvdata(file);
 977         int ret;
 978
 979         dev_dbg(s->dev, "index=%d\n", v->index);
 980
 981         if (v->index == 0)
 982                 ret = 0;
 983         else if (v->index == 1)
 984                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_tuner, v);
 985         else
 986                 ret = -EINVAL;
 987
 988         return ret;
 989 }
 990
 991 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
 992 {
 993         struct msi2500_state *s = video_drvdata(file);
 994         int ret;
 995
 996         dev_dbg(s->dev, "index=%d\n", v->index);
 997
 998         if (v->index == 0) {
 999                 strlcpy(v->name, "Mirics MSi2500", sizeof(v->name));
1000                 v->type = V4L2_TUNER_ADC;
1001                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1002                 v->rangelow =   1200000;
1003                 v->rangehigh = 15000000;
1004                 ret = 0;
1005         } else if (v->index == 1) {
1006                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_tuner, v);
1007         } else {
1008                 ret = -EINVAL;
1009         }
1010
1011         return ret;
1012 }
1013
1014 static int msi2500_g_frequency(struct file *file, void *priv,
1015                 struct v4l2_frequency *f)
1016 {
1017         struct msi2500_state *s = video_drvdata(file);
1018         int ret  = 0;
1019
1020         dev_dbg(s->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1021
1022         if (f->tuner == 0) {
1023                 f->frequency = s->f_adc;
1024                 ret = 0;
1025         } else if (f->tuner == 1) {
1026                 f->type = V4L2_TUNER_RF;
1027                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_frequency, f);
1028         } else {
1029                 ret = -EINVAL;
1030         }
1031
1032         return ret;
1033 }
1034
1035 static int msi2500_s_frequency(struct file *file, void *priv,
1036                 const struct v4l2_frequency *f)
1037 {
1038         struct msi2500_state *s = video_drvdata(file);
1039         int ret;
1040
1041         dev_dbg(s->dev, "tuner=%d type=%d frequency=%u\n",
1042                         f->tuner, f->type, f->frequency);
1043
1044         if (f->tuner == 0) {
1045                 s->f_adc = clamp_t(unsigned int, f->frequency,
1046                                 bands[0].rangelow,
1047                                 bands[0].rangehigh);
1048                 dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc);
1049                 ret = msi2500_set_usb_adc(s);
1050         } else if (f->tuner == 1) {
1051                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_frequency, f);
1052         } else {
1053                 ret = -EINVAL;
1054         }
1055
1056         return ret;
1057 }
1058
1059 static int msi2500_enum_freq_bands(struct file *file, void *priv,
1060                 struct v4l2_frequency_band *band)
1061 {
1062         struct msi2500_state *s = video_drvdata(file);
1063         int ret;
1064
1065         dev_dbg(s->dev, "tuner=%d type=%d index=%d\n",
1066                         band->tuner, band->type, band->index);
1067
1068         if (band->tuner == 0) {
1069                 if (band->index >= ARRAY_SIZE(bands)) {
1070                         ret = -EINVAL;
1071                 } else {
1072                         *band = bands[band->index];
1073                         ret = 0;
1074                 }
1075         } else if (band->tuner == 1) {
1076                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner,
1077                                 enum_freq_bands, band);
1078         } else {
1079                 ret = -EINVAL;
1080         }
1081
1082         return ret;
1083 }
1084
1085 static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1086         .vidioc_querycap          = msi2500_querycap,
1087
1088         .vidioc_enum_fmt_sdr_cap  = msi2500_enum_fmt_sdr_cap,
1089         .vidioc_g_fmt_sdr_cap     = msi2500_g_fmt_sdr_cap,
1090         .vidioc_s_fmt_sdr_cap     = msi2500_s_fmt_sdr_cap,
1091         .vidioc_try_fmt_sdr_cap   = msi2500_try_fmt_sdr_cap,
1092
1093         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1094         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1095         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1096         .vidioc_querybuf          = vb2_ioctl_querybuf,
1097         .vidioc_qbuf              = vb2_ioctl_qbuf,
1098         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1099
1100         .vidioc_streamon          = vb2_ioctl_streamon,
1101         .vidioc_streamoff         = vb2_ioctl_streamoff,
1102
1103         .vidioc_g_tuner           = msi2500_g_tuner,
1104         .vidioc_s_tuner           = msi2500_s_tuner,
1105
1106         .vidioc_g_frequency       = msi2500_g_frequency,
1107         .vidioc_s_frequency       = msi2500_s_frequency,
1108         .vidioc_enum_freq_bands   = msi2500_enum_freq_bands,
1109
1110         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1111         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1112         .vidioc_log_status        = v4l2_ctrl_log_status,
1113 };
1114
1115 static const struct v4l2_file_operations msi2500_fops = {
1116         .owner                    = THIS_MODULE,
1117         .open                     = v4l2_fh_open,
1118         .release                  = vb2_fop_release,
1119         .read                     = vb2_fop_read,
1120         .poll                     = vb2_fop_poll,
1121         .mmap                     = vb2_fop_mmap,
1122         .unlocked_ioctl           = video_ioctl2,
1123 };
1124
1125 static struct video_device msi2500_template = {
1126         .name                     = "Mirics MSi3101 SDR Dongle",
1127         .release                  = video_device_release_empty,
1128         .fops                     = &msi2500_fops,
1129         .ioctl_ops                = &msi2500_ioctl_ops,
1130 };
1131
1132 static void msi2500_video_release(struct v4l2_device *v)
1133 {
1134         struct msi2500_state *s =
1135                         container_of(v, struct msi2500_state, v4l2_dev);
1136
1137         v4l2_ctrl_handler_free(&s->hdl);
1138         v4l2_device_unregister(&s->v4l2_dev);
1139         kfree(s);
1140 }
1141
1142 static int msi2500_transfer_one_message(struct spi_master *master,
1143                 struct spi_message *m)
1144 {
1145         struct msi2500_state *s = spi_master_get_devdata(master);
1146         struct spi_transfer *t;
1147         int ret = 0;
1148         u32 data;
1149
1150         list_for_each_entry(t, &m->transfers, transfer_list) {
1151                 dev_dbg(s->dev, "msg=%*ph\n", t->len, t->tx_buf);
1152                 data = 0x09; /* reg 9 is SPI adapter */
1153                 data |= ((u8 *)t->tx_buf)[0] << 8;
1154                 data |= ((u8 *)t->tx_buf)[1] << 16;
1155                 data |= ((u8 *)t->tx_buf)[2] << 24;
1156                 ret = msi2500_ctrl_msg(s, CMD_WREG, data);
1157         }
1158
1159         m->status = ret;
1160         spi_finalize_current_message(master);
1161         return ret;
1162 }
1163
1164 static int msi2500_probe(struct usb_interface *intf,
1165                 const struct usb_device_id *id)
1166 {
1167         struct msi2500_state *s;
1168         struct v4l2_subdev *sd;
1169         struct spi_master *master;
1170         int ret;
1171         static struct spi_board_info board_info = {
1172                 .modalias               = "msi001",
1173                 .bus_num                = 0,
1174                 .chip_select            = 0,
1175                 .max_speed_hz           = 12000000,
1176         };
1177
1178         s = kzalloc(sizeof(struct msi2500_state), GFP_KERNEL);
1179         if (s == NULL) {
1180                 dev_err(&intf->dev, "Could not allocate memory for state\n");
1181                 return -ENOMEM;
1182         }
1183
1184         mutex_init(&s->v4l2_lock);
1185         mutex_init(&s->vb_queue_lock);
1186         spin_lock_init(&s->queued_bufs_lock);
1187         INIT_LIST_HEAD(&s->queued_bufs);
1188         s->dev = &intf->dev;
1189         s->udev = interface_to_usbdev(intf);
1190         s->f_adc = bands[0].rangelow;
1191         s->pixelformat = formats[0].pixelformat;
1192         s->buffersize = formats[0].buffersize;
1193         s->num_formats = NUM_FORMATS;
1194         if (!msi2500_emulated_fmt)
1195                 s->num_formats -= 2;
1196
1197         /* Init videobuf2 queue structure */
1198         s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1199         s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1200         s->vb_queue.drv_priv = s;
1201         s->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1202         s->vb_queue.ops = &msi2500_vb2_ops;
1203         s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1204         s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1205         ret = vb2_queue_init(&s->vb_queue);
1206         if (ret) {
1207                 dev_err(s->dev, "Could not initialize vb2 queue\n");
1208                 goto err_free_mem;
1209         }
1210
1211         /* Init video_device structure */
1212         s->vdev = msi2500_template;
1213         s->vdev.queue = &s->vb_queue;
1214         s->vdev.queue->lock = &s->vb_queue_lock;
1215         video_set_drvdata(&s->vdev, s);
1216
1217         /* Register the v4l2_device structure */
1218         s->v4l2_dev.release = msi2500_video_release;
1219         ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
1220         if (ret) {
1221                 dev_err(s->dev, "Failed to register v4l2-device (%d)\n", ret);
1222                 goto err_free_mem;
1223         }
1224
1225         /* SPI master adapter */
1226         master = spi_alloc_master(s->dev, 0);
1227         if (master == NULL) {
1228                 ret = -ENOMEM;
1229                 goto err_unregister_v4l2_dev;
1230         }
1231
1232         s->master = master;
1233         master->bus_num = 0;
1234         master->num_chipselect = 1;
1235         master->transfer_one_message = msi2500_transfer_one_message;
1236         spi_master_set_devdata(master, s);
1237         ret = spi_register_master(master);
1238         if (ret) {
1239                 spi_master_put(master);
1240                 goto err_unregister_v4l2_dev;
1241         }
1242
1243         /* load v4l2 subdevice */
1244         sd = v4l2_spi_new_subdev(&s->v4l2_dev, master, &board_info);
1245         s->v4l2_subdev = sd;
1246         if (sd == NULL) {
1247                 dev_err(s->dev, "cannot get v4l2 subdevice\n");
1248                 ret = -ENODEV;
1249                 goto err_unregister_master;
1250         }
1251
1252         /* Register controls */
1253         v4l2_ctrl_handler_init(&s->hdl, 0);
1254         if (s->hdl.error) {
1255                 ret = s->hdl.error;
1256                 dev_err(s->dev, "Could not initialize controls\n");
1257                 goto err_free_controls;
1258         }
1259
1260         /* currently all controls are from subdev */
1261         v4l2_ctrl_add_handler(&s->hdl, sd->ctrl_handler, NULL);
1262
1263         s->v4l2_dev.ctrl_handler = &s->hdl;
1264         s->vdev.v4l2_dev = &s->v4l2_dev;
1265         s->vdev.lock = &s->v4l2_lock;
1266
1267         ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1268         if (ret) {
1269                 dev_err(s->dev, "Failed to register as video device (%d)\n",
1270                                 ret);
1271                 goto err_unregister_v4l2_dev;
1272         }
1273         dev_info(s->dev, "Registered as %s\n",
1274                         video_device_node_name(&s->vdev));
1275         dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n");
1276
1277         return 0;
1278
1279 err_free_controls:
1280         v4l2_ctrl_handler_free(&s->hdl);
1281 err_unregister_master:
1282         spi_unregister_master(s->master);
1283 err_unregister_v4l2_dev:
1284         v4l2_device_unregister(&s->v4l2_dev);
1285 err_free_mem:
1286         kfree(s);
1287         return ret;
1288 }
1289
1290 /* USB device ID list */
1291 static struct usb_device_id msi2500_id_table[] = {
1292         { USB_DEVICE(0x1df7, 0x2500) }, /* Mirics MSi3101 SDR Dongle */
1293         { USB_DEVICE(0x2040, 0xd300) }, /* Hauppauge WinTV 133559 LF */
1294         { }
1295 };
1296 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1297
1298 /* USB subsystem interface */
1299 static struct usb_driver msi2500_driver = {
1300         .name                     = KBUILD_MODNAME,
1301         .probe                    = msi2500_probe,
1302         .disconnect               = msi2500_disconnect,
1303         .id_table                 = msi2500_id_table,
1304 };
1305
1306 module_usb_driver(msi2500_driver);
1307
1308 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1309 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1310 MODULE_LICENSE("GPL");