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 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         unsigned int sample_ctrl_bit[4];
 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 = 0;
 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->udev->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->udev->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->udev->dev,
 326                                         "%*ph\n", 24, &src[1000]);
 327                         memcpy(dst, src, 984);
 328                         src += 984 + 24;
 329                         dst += 984;
 330                         dst_len += 984;
 331                         s->next_sample = sample[i] + 384;
 332                         break;
 333                 case V4L2_SDR_FMT_CS8:         /* 504 x IQ samples */
 334                         memcpy(dst, src, 1008);
 335                         src += 1008;
 336                         dst += 1008;
 337                         dst_len += 1008;
 338                         s->next_sample = sample[i] + 504;
 339                         break;
 340                 case MSI2500_PIX_FMT_SDR_S12:  /* 336 x IQ samples */
 341                         memcpy(dst, src, 1008);
 342                         src += 1008;
 343                         dst += 1008;
 344                         dst_len += 1008;
 345                         s->next_sample = sample[i] + 336;
 346                         break;
 347                 case V4L2_SDR_FMT_CS14LE:      /* 252 x IQ samples */
 348                         memcpy(dst, src, 1008);
 349                         src += 1008;
 350                         dst += 1008;
 351                         dst_len += 1008;
 352                         s->next_sample = sample[i] + 252;
 353                         break;
 354                 default:
 355                         break;
 356                 }
 357         }
 358
 359         /* calculate sample rate and output it in 10 seconds intervals */
 360         if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
 361                 #define MSECS 10000UL
 362                 unsigned int msecs = jiffies_to_msecs(jiffies -
 363                                 s->jiffies_next + msecs_to_jiffies(MSECS));
 364                 unsigned int samples = s->next_sample - s->sample;
 365
 366                 s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 367                 s->sample = s->next_sample;
 368                 dev_dbg(&s->udev->dev,
 369                                 "size=%u samples=%u msecs=%u sample rate=%lu\n",
 370                                 src_len, samples, msecs,
 371                                 samples * 1000UL / msecs);
 372         }
 373
 374         return dst_len;
 375 }
 376
 377 /*
 378  * This gets called for the Isochronous pipe (stream). This is done in interrupt
 379  * time, so it has to be fast, not crash, and not stall. Neat.
 380  */
 381 static void msi2500_isoc_handler(struct urb *urb)
 382 {
 383         struct msi2500_state *s = (struct msi2500_state *)urb->context;
 384         int i, flen, fstatus;
 385         unsigned char *iso_buf = NULL;
 386         struct msi2500_frame_buf *fbuf;
 387
 388         if (unlikely(urb->status == -ENOENT || urb->status == -ECONNRESET ||
 389                         urb->status == -ESHUTDOWN)) {
 390                 dev_dbg(&s->udev->dev, "URB (%p) unlinked %ssynchronuously\n",
 391                                 urb, urb->status == -ENOENT ? "" : "a");
 392                 return;
 393         }
 394
 395         if (unlikely(urb->status != 0)) {
 396                 dev_dbg(&s->udev->dev,
 397                                 "msi2500_isoc_handler() called with status %d\n",
 398                                 urb->status);
 399                 /* Give up after a number of contiguous errors */
 400                 if (++s->isoc_errors > MAX_ISOC_ERRORS)
 401                         dev_dbg(&s->udev->dev,
 402                                         "Too many ISOC errors, bailing out\n");
 403                 goto handler_end;
 404         } else {
 405                 /* Reset ISOC error counter. We did get here, after all. */
 406                 s->isoc_errors = 0;
 407         }
 408
 409         /* Compact data */
 410         for (i = 0; i < urb->number_of_packets; i++) {
 411                 void *ptr;
 412
 413                 /* Check frame error */
 414                 fstatus = urb->iso_frame_desc[i].status;
 415                 if (unlikely(fstatus)) {
 416                         dev_dbg_ratelimited(&s->udev->dev,
 417                                         "frame=%d/%d has error %d skipping\n",
 418                                         i, urb->number_of_packets, fstatus);
 419                         continue;
 420                 }
 421
 422                 /* Check if that frame contains data */
 423                 flen = urb->iso_frame_desc[i].actual_length;
 424                 if (unlikely(flen == 0))
 425                         continue;
 426
 427                 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 428
 429                 /* Get free framebuffer */
 430                 fbuf = msi2500_get_next_fill_buf(s);
 431                 if (unlikely(fbuf == NULL)) {
 432                         s->vb_full++;
 433                         dev_dbg_ratelimited(&s->udev->dev,
 434                                         "videobuf is full, %d packets dropped\n",
 435                                         s->vb_full);
 436                         continue;
 437                 }
 438
 439                 /* fill framebuffer */
 440                 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
 441                 flen = msi2500_convert_stream(s, ptr, iso_buf, flen);
 442                 vb2_set_plane_payload(&fbuf->vb, 0, flen);
 443                 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
 444         }
 445
 446 handler_end:
 447         i = usb_submit_urb(urb, GFP_ATOMIC);
 448         if (unlikely(i != 0))
 449                 dev_dbg(&s->udev->dev,
 450                                 "Error (%d) re-submitting urb in msi2500_isoc_handler\n",
 451                                 i);
 452 }
 453
 454 static void msi2500_iso_stop(struct msi2500_state *s)
 455 {
 456         int i;
 457
 458         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 459
 460         /* Unlinking ISOC buffers one by one */
 461         for (i = 0; i < MAX_ISO_BUFS; i++) {
 462                 if (s->urbs[i]) {
 463                         dev_dbg(&s->udev->dev, "Unlinking URB %p\n",
 464                                         s->urbs[i]);
 465                         usb_kill_urb(s->urbs[i]);
 466                 }
 467         }
 468 }
 469
 470 static void msi2500_iso_free(struct msi2500_state *s)
 471 {
 472         int i;
 473
 474         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 475
 476         /* Freeing ISOC buffers one by one */
 477         for (i = 0; i < MAX_ISO_BUFS; i++) {
 478                 if (s->urbs[i]) {
 479                         dev_dbg(&s->udev->dev, "Freeing URB\n");
 480                         if (s->urbs[i]->transfer_buffer) {
 481                                 usb_free_coherent(s->udev,
 482                                         s->urbs[i]->transfer_buffer_length,
 483                                         s->urbs[i]->transfer_buffer,
 484                                         s->urbs[i]->transfer_dma);
 485                         }
 486                         usb_free_urb(s->urbs[i]);
 487                         s->urbs[i] = NULL;
 488                 }
 489         }
 490 }
 491
 492 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 493 static void msi2500_isoc_cleanup(struct msi2500_state *s)
 494 {
 495         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 496
 497         msi2500_iso_stop(s);
 498         msi2500_iso_free(s);
 499 }
 500
 501 /* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 502 static int msi2500_isoc_init(struct msi2500_state *s)
 503 {
 504         struct usb_device *udev;
 505         struct urb *urb;
 506         int i, j, ret;
 507
 508         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 509
 510         s->isoc_errors = 0;
 511         udev = s->udev;
 512
 513         ret = usb_set_interface(s->udev, 0, 1);
 514         if (ret)
 515                 return ret;
 516
 517         /* Allocate and init Isochronuous urbs */
 518         for (i = 0; i < MAX_ISO_BUFS; i++) {
 519                 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 520                 if (urb == NULL) {
 521                         dev_err(&s->udev->dev,
 522                                         "Failed to allocate urb %d\n", i);
 523                         msi2500_isoc_cleanup(s);
 524                         return -ENOMEM;
 525                 }
 526                 s->urbs[i] = urb;
 527                 dev_dbg(&s->udev->dev, "Allocated URB at 0x%p\n", urb);
 528
 529                 urb->interval = 1;
 530                 urb->dev = udev;
 531                 urb->pipe = usb_rcvisocpipe(udev, 0x81);
 532                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 533                 urb->transfer_buffer = usb_alloc_coherent(udev, ISO_BUFFER_SIZE,
 534                                 GFP_KERNEL, &urb->transfer_dma);
 535                 if (urb->transfer_buffer == NULL) {
 536                         dev_err(&s->udev->dev,
 537                                         "Failed to allocate urb buffer %d\n",
 538                                         i);
 539                         msi2500_isoc_cleanup(s);
 540                         return -ENOMEM;
 541                 }
 542                 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 543                 urb->complete = msi2500_isoc_handler;
 544                 urb->context = s;
 545                 urb->start_frame = 0;
 546                 urb->number_of_packets = ISO_FRAMES_PER_DESC;
 547                 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 548                         urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 549                         urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 550                 }
 551         }
 552
 553         /* link */
 554         for (i = 0; i < MAX_ISO_BUFS; i++) {
 555                 ret = usb_submit_urb(s->urbs[i], GFP_KERNEL);
 556                 if (ret) {
 557                         dev_err(&s->udev->dev,
 558                                         "isoc_init() submit_urb %d failed with error %d\n",
 559                                         i, ret);
 560                         msi2500_isoc_cleanup(s);
 561                         return ret;
 562                 }
 563                 dev_dbg(&s->udev->dev, "URB 0x%p submitted.\n", s->urbs[i]);
 564         }
 565
 566         /* All is done... */
 567         return 0;
 568 }
 569
 570 /* Must be called with vb_queue_lock hold */
 571 static void msi2500_cleanup_queued_bufs(struct msi2500_state *s)
 572 {
 573         unsigned long flags = 0;
 574
 575         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 576
 577         spin_lock_irqsave(&s->queued_bufs_lock, flags);
 578         while (!list_empty(&s->queued_bufs)) {
 579                 struct msi2500_frame_buf *buf;
 580
 581                 buf = list_entry(s->queued_bufs.next, struct msi2500_frame_buf,
 582                                  list);
 583                 list_del(&buf->list);
 584                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 585         }
 586         spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
 587 }
 588
 589 /* The user yanked out the cable... */
 590 static void msi2500_disconnect(struct usb_interface *intf)
 591 {
 592         struct v4l2_device *v = usb_get_intfdata(intf);
 593         struct msi2500_state *s =
 594                         container_of(v, struct msi2500_state, v4l2_dev);
 595
 596         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 597
 598         mutex_lock(&s->vb_queue_lock);
 599         mutex_lock(&s->v4l2_lock);
 600         /* No need to keep the urbs around after disconnection */
 601         s->udev = NULL;
 602         v4l2_device_disconnect(&s->v4l2_dev);
 603         video_unregister_device(&s->vdev);
 604         spi_unregister_master(s->master);
 605         mutex_unlock(&s->v4l2_lock);
 606         mutex_unlock(&s->vb_queue_lock);
 607
 608         v4l2_device_put(&s->v4l2_dev);
 609 }
 610
 611 static int msi2500_querycap(struct file *file, void *fh,
 612                 struct v4l2_capability *cap)
 613 {
 614         struct msi2500_state *s = video_drvdata(file);
 615
 616         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 617
 618         strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 619         strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
 620         usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
 621         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
 622                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
 623         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 624         return 0;
 625 }
 626
 627 /* Videobuf2 operations */
 628 static int msi2500_queue_setup(struct vb2_queue *vq,
 629                 const struct v4l2_format *fmt, unsigned int *nbuffers,
 630                 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 631 {
 632         struct msi2500_state *s = vb2_get_drv_priv(vq);
 633
 634         dev_dbg(&s->udev->dev, "%s: *nbuffers=%d\n", __func__, *nbuffers);
 635
 636         /* Absolute min and max number of buffers available for mmap() */
 637         *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
 638         *nplanes = 1;
 639         sizes[0] = PAGE_ALIGN(s->buffersize);
 640         dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
 641                         __func__, *nbuffers, sizes[0]);
 642         return 0;
 643 }
 644
 645 static void msi2500_buf_queue(struct vb2_buffer *vb)
 646 {
 647         struct msi2500_state *s = vb2_get_drv_priv(vb->vb2_queue);
 648         struct msi2500_frame_buf *buf =
 649                         container_of(vb, struct msi2500_frame_buf, vb);
 650         unsigned long flags = 0;
 651
 652         /* Check the device has not disconnected between prep and queuing */
 653         if (unlikely(!s->udev)) {
 654                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 655                 return;
 656         }
 657
 658         spin_lock_irqsave(&s->queued_bufs_lock, flags);
 659         list_add_tail(&buf->list, &s->queued_bufs);
 660         spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
 661 }
 662
 663 #define CMD_WREG               0x41
 664 #define CMD_START_STREAMING    0x43
 665 #define CMD_STOP_STREAMING     0x45
 666 #define CMD_READ_UNKNOW        0x48
 667
 668 #define msi2500_dbg_usb_control_msg(_udev, _r, _t, _v, _i, _b, _l) { \
 669         char *_direction; \
 670         if (_t & USB_DIR_IN) \
 671                 _direction = "<<<"; \
 672         else \
 673                 _direction = ">>>"; \
 674         dev_dbg(&_udev->dev, "%s: %02x %02x %02x %02x %02x %02x %02x %02x " \
 675                         "%s %*ph\n",  __func__, _t, _r, _v & 0xff, _v >> 8, \
 676                         _i & 0xff, _i >> 8, _l & 0xff, _l >> 8, _direction, \
 677                         _l, _b); \
 678 }
 679
 680 static int msi2500_ctrl_msg(struct msi2500_state *s, u8 cmd, u32 data)
 681 {
 682         int ret;
 683         u8 request = cmd;
 684         u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
 685         u16 value = (data >> 0) & 0xffff;
 686         u16 index = (data >> 16) & 0xffff;
 687
 688         msi2500_dbg_usb_control_msg(s->udev,
 689                         request, requesttype, value, index, NULL, 0);
 690
 691         ret = usb_control_msg(s->udev, usb_sndctrlpipe(s->udev, 0),
 692                         request, requesttype, value, index, NULL, 0, 2000);
 693
 694         if (ret)
 695                 dev_err(&s->udev->dev, "%s: failed %d, cmd %02x, data %04x\n",
 696                                 __func__, ret, cmd, data);
 697
 698         return ret;
 699 };
 700
 701 #define F_REF 24000000
 702 #define DIV_R_IN 2
 703 static int msi2500_set_usb_adc(struct msi2500_state *s)
 704 {
 705         int ret, div_n, div_m, div_r_out, f_sr, f_vco, fract;
 706         u32 reg3, reg4, reg7;
 707         struct v4l2_ctrl *bandwidth_auto;
 708         struct v4l2_ctrl *bandwidth;
 709
 710         f_sr = s->f_adc;
 711
 712         /* set tuner, subdev, filters according to sampling rate */
 713         bandwidth_auto = v4l2_ctrl_find(&s->hdl,
 714                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 715         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 716                 bandwidth = v4l2_ctrl_find(&s->hdl,
 717                                 V4L2_CID_RF_TUNER_BANDWIDTH);
 718                 v4l2_ctrl_s_ctrl(bandwidth, s->f_adc);
 719         }
 720
 721         /* select stream format */
 722         switch (s->pixelformat) {
 723         case V4L2_SDR_FMT_CU8:
 724                 reg7 = 0x000c9407; /* 504 */
 725                 break;
 726         case  V4L2_SDR_FMT_CU16LE:
 727                 reg7 = 0x00009407; /* 252 */
 728                 break;
 729         case V4L2_SDR_FMT_CS8:
 730                 reg7 = 0x000c9407; /* 504 */
 731                 break;
 732         case MSI2500_PIX_FMT_SDR_MSI2500_384:
 733                 reg7 = 0x0000a507; /* 384 */
 734                 break;
 735         case MSI2500_PIX_FMT_SDR_S12:
 736                 reg7 = 0x00008507; /* 336 */
 737                 break;
 738         case V4L2_SDR_FMT_CS14LE:
 739                 reg7 = 0x00009407; /* 252 */
 740                 break;
 741         default:
 742                 reg7 = 0x000c9407; /* 504 */
 743                 break;
 744         }
 745
 746         /*
 747          * Synthesizer config is just a educated guess...
 748          *
 749          * [7:0]   0x03, register address
 750          * [8]     1, power control
 751          * [9]     ?, power control
 752          * [12:10] output divider
 753          * [13]    0 ?
 754          * [14]    0 ?
 755          * [15]    fractional MSB, bit 20
 756          * [16:19] N
 757          * [23:20] ?
 758          * [24:31] 0x01
 759          *
 760          * output divider
 761          * val   div
 762          *   0     - (invalid)
 763          *   1     4
 764          *   2     6
 765          *   3     8
 766          *   4    10
 767          *   5    12
 768          *   6    14
 769          *   7    16
 770          *
 771          * VCO 202000000 - 720000000++
 772          */
 773         reg3 = 0x01000303;
 774         reg4 = 0x00000004;
 775
 776         /* XXX: Filters? AGC? */
 777         if (f_sr < 6000000)
 778                 reg3 |= 0x1 << 20;
 779         else if (f_sr < 7000000)
 780                 reg3 |= 0x5 << 20;
 781         else if (f_sr < 8500000)
 782                 reg3 |= 0x9 << 20;
 783         else
 784                 reg3 |= 0xd << 20;
 785
 786         for (div_r_out = 4; div_r_out < 16; div_r_out += 2) {
 787                 f_vco = f_sr * div_r_out * 12;
 788                 dev_dbg(&s->udev->dev, "%s: div_r_out=%d f_vco=%d\n",
 789                                 __func__, div_r_out, f_vco);
 790                 if (f_vco >= 202000000)
 791                         break;
 792         }
 793
 794         div_n = f_vco / (F_REF * DIV_R_IN);
 795         div_m = f_vco % (F_REF * DIV_R_IN);
 796         fract = 0x200000ul * div_m / (F_REF * DIV_R_IN);
 797
 798         reg3 |= div_n << 16;
 799         reg3 |= (div_r_out / 2 - 1) << 10;
 800         reg3 |= ((fract >> 20) & 0x000001) << 15; /* [20] */
 801         reg4 |= ((fract >>  0) & 0x0fffff) <<  8; /* [19:0] */
 802
 803         dev_dbg(&s->udev->dev,
 804                         "%s: f_sr=%d f_vco=%d div_n=%d div_m=%d div_r_out=%d reg3=%08x reg4=%08x\n",
 805                         __func__, f_sr, f_vco, div_n, div_m, div_r_out, reg3,
 806                         reg4);
 807
 808         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00608008);
 809         if (ret)
 810                 goto err;
 811
 812         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00000c05);
 813         if (ret)
 814                 goto err;
 815
 816         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00020000);
 817         if (ret)
 818                 goto err;
 819
 820         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00480102);
 821         if (ret)
 822                 goto err;
 823
 824         ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00f38008);
 825         if (ret)
 826                 goto err;
 827
 828         ret = msi2500_ctrl_msg(s, CMD_WREG, reg7);
 829         if (ret)
 830                 goto err;
 831
 832         ret = msi2500_ctrl_msg(s, CMD_WREG, reg4);
 833         if (ret)
 834                 goto err;
 835
 836         ret = msi2500_ctrl_msg(s, CMD_WREG, reg3);
 837         if (ret)
 838                 goto err;
 839 err:
 840         return ret;
 841 };
 842
 843 static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
 844 {
 845         struct msi2500_state *s = vb2_get_drv_priv(vq);
 846         int ret;
 847
 848         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 849
 850         if (!s->udev)
 851                 return -ENODEV;
 852
 853         if (mutex_lock_interruptible(&s->v4l2_lock))
 854                 return -ERESTARTSYS;
 855
 856         /* wake-up tuner */
 857         v4l2_subdev_call(s->v4l2_subdev, core, s_power, 1);
 858
 859         ret = msi2500_set_usb_adc(s);
 860
 861         ret = msi2500_isoc_init(s);
 862         if (ret)
 863                 msi2500_cleanup_queued_bufs(s);
 864
 865         ret = msi2500_ctrl_msg(s, CMD_START_STREAMING, 0);
 866
 867         mutex_unlock(&s->v4l2_lock);
 868
 869         return ret;
 870 }
 871
 872 static void msi2500_stop_streaming(struct vb2_queue *vq)
 873 {
 874         struct msi2500_state *s = vb2_get_drv_priv(vq);
 875
 876         dev_dbg(&s->udev->dev, "%s:\n", __func__);
 877
 878         mutex_lock(&s->v4l2_lock);
 879
 880         if (s->udev)
 881                 msi2500_isoc_cleanup(s);
 882
 883         msi2500_cleanup_queued_bufs(s);
 884
 885         /* according to tests, at least 700us delay is required  */
 886         msleep(20);
 887         if (!msi2500_ctrl_msg(s, CMD_STOP_STREAMING, 0)) {
 888                 /* sleep USB IF / ADC */
 889                 msi2500_ctrl_msg(s, CMD_WREG, 0x01000003);
 890         }
 891
 892         /* sleep tuner */
 893         v4l2_subdev_call(s->v4l2_subdev, core, s_power, 0);
 894
 895         mutex_unlock(&s->v4l2_lock);
 896 }
 897
 898 static struct vb2_ops msi2500_vb2_ops = {
 899         .queue_setup            = msi2500_queue_setup,
 900         .buf_queue              = msi2500_buf_queue,
 901         .start_streaming        = msi2500_start_streaming,
 902         .stop_streaming         = msi2500_stop_streaming,
 903         .wait_prepare           = vb2_ops_wait_prepare,
 904         .wait_finish            = vb2_ops_wait_finish,
 905 };
 906
 907 static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
 908                 struct v4l2_fmtdesc *f)
 909 {
 910         struct msi2500_state *s = video_drvdata(file);
 911
 912         dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, f->index);
 913
 914         if (f->index >= s->num_formats)
 915                 return -EINVAL;
 916
 917         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
 918         f->pixelformat = formats[f->index].pixelformat;
 919
 920         return 0;
 921 }
 922
 923 static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
 924                 struct v4l2_format *f)
 925 {
 926         struct msi2500_state *s = video_drvdata(file);
 927
 928         dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
 929                         (char *)&s->pixelformat);
 930
 931         f->fmt.sdr.pixelformat = s->pixelformat;
 932         f->fmt.sdr.buffersize = s->buffersize;
 933         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 934
 935         return 0;
 936 }
 937
 938 static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
 939                 struct v4l2_format *f)
 940 {
 941         struct msi2500_state *s = video_drvdata(file);
 942         struct vb2_queue *q = &s->vb_queue;
 943         int i;
 944
 945         dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
 946                         (char *)&f->fmt.sdr.pixelformat);
 947
 948         if (vb2_is_busy(q))
 949                 return -EBUSY;
 950
 951         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 952         for (i = 0; i < s->num_formats; i++) {
 953                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 954                         s->pixelformat = formats[i].pixelformat;
 955                         s->buffersize = formats[i].buffersize;
 956                         f->fmt.sdr.buffersize = formats[i].buffersize;
 957                         return 0;
 958                 }
 959         }
 960
 961         s->pixelformat = formats[0].pixelformat;
 962         s->buffersize = formats[0].buffersize;
 963         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 964         f->fmt.sdr.buffersize = formats[0].buffersize;
 965
 966         return 0;
 967 }
 968
 969 static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
 970                 struct v4l2_format *f)
 971 {
 972         struct msi2500_state *s = video_drvdata(file);
 973         int i;
 974
 975         dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
 976                         (char *)&f->fmt.sdr.pixelformat);
 977
 978         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 979         for (i = 0; i < s->num_formats; i++) {
 980                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 981                         f->fmt.sdr.buffersize = formats[i].buffersize;
 982                         return 0;
 983                 }
 984         }
 985
 986         f->fmt.sdr.pixelformat = formats[0].pixelformat;
 987         f->fmt.sdr.buffersize = formats[0].buffersize;
 988
 989         return 0;
 990 }
 991
 992 static int msi2500_s_tuner(struct file *file, void *priv,
 993                 const struct v4l2_tuner *v)
 994 {
 995         struct msi2500_state *s = video_drvdata(file);
 996         int ret;
 997
 998         dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
 999
1000         if (v->index == 0)
1001                 ret = 0;
1002         else if (v->index == 1)
1003                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_tuner, v);
1004         else
1005                 ret = -EINVAL;
1006
1007         return ret;
1008 }
1009
1010 static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
1011 {
1012         struct msi2500_state *s = video_drvdata(file);
1013         int ret;
1014
1015         dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
1016
1017         if (v->index == 0) {
1018                 strlcpy(v->name, "Mirics MSi2500", sizeof(v->name));
1019                 v->type = V4L2_TUNER_ADC;
1020                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1021                 v->rangelow =   1200000;
1022                 v->rangehigh = 15000000;
1023                 ret = 0;
1024         } else if (v->index == 1) {
1025                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_tuner, v);
1026         } else {
1027                 ret = -EINVAL;
1028         }
1029
1030         return ret;
1031 }
1032
1033 static int msi2500_g_frequency(struct file *file, void *priv,
1034                 struct v4l2_frequency *f)
1035 {
1036         struct msi2500_state *s = video_drvdata(file);
1037         int ret  = 0;
1038
1039         dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d\n",
1040                         __func__, f->tuner, f->type);
1041
1042         if (f->tuner == 0) {
1043                 f->frequency = s->f_adc;
1044                 ret = 0;
1045         } else if (f->tuner == 1) {
1046                 f->type = V4L2_TUNER_RF;
1047                 ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_frequency, f);
1048         } else {
1049                 ret = -EINVAL;
1050         }
1051
1052         return ret;
1053 }
1054
1055 static int msi2500_s_frequency(struct file *file, void *priv,
1056                 const struct v4l2_frequency *f)
1057 {
1058         struct msi2500_state *s = video_drvdata(file);
1059         int ret;
1060
1061         dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d frequency=%u\n",
1062                         __func__, f->tuner, f->type, f->frequency);
1063
1064         if (f->tuner == 0) {
1065                 s->f_adc = clamp_t(unsigned int, f->frequency,
1066                                 bands[0].rangelow,
1067                                 bands[0].rangehigh);
1068                 dev_dbg(&s->udev->dev, "%s: ADC frequency=%u Hz\n",
1069                                 __func__, s->f_adc);
1070                 ret = msi2500_set_usb_adc(s);
1071         } else if (f->tuner == 1) {
1072                 ret = v4l2_subdev_call(s->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_state *s = video_drvdata(file);
1084         int ret;
1085
1086         dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d index=%d\n",
1087                         __func__, 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(s->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 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_state *s =
1156                         container_of(v, struct msi2500_state, v4l2_dev);
1157
1158         v4l2_ctrl_handler_free(&s->hdl);
1159         v4l2_device_unregister(&s->v4l2_dev);
1160         kfree(s);
1161 }
1162
1163 static int msi2500_transfer_one_message(struct spi_master *master,
1164                 struct spi_message *m)
1165 {
1166         struct msi2500_state *s = spi_master_get_devdata(master);
1167         struct spi_transfer *t;
1168         int ret = 0;
1169         u32 data;
1170
1171         list_for_each_entry(t, &m->transfers, transfer_list) {
1172                 dev_dbg(&s->udev->dev, "%s: msg=%*ph\n",
1173                                 __func__, t->len, t->tx_buf);
1174                 data = 0x09; /* reg 9 is SPI adapter */
1175                 data |= ((u8 *)t->tx_buf)[0] << 8;
1176                 data |= ((u8 *)t->tx_buf)[1] << 16;
1177                 data |= ((u8 *)t->tx_buf)[2] << 24;
1178                 ret = msi2500_ctrl_msg(s, CMD_WREG, data);
1179         }
1180
1181         m->status = ret;
1182         spi_finalize_current_message(master);
1183         return ret;
1184 }
1185
1186 static int msi2500_probe(struct usb_interface *intf,
1187                 const struct usb_device_id *id)
1188 {
1189         struct usb_device *udev = interface_to_usbdev(intf);
1190         struct msi2500_state *s = NULL;
1191         struct v4l2_subdev *sd;
1192         struct spi_master *master;
1193         int ret;
1194         static struct spi_board_info board_info = {
1195                 .modalias               = "msi001",
1196                 .bus_num                = 0,
1197                 .chip_select            = 0,
1198                 .max_speed_hz           = 12000000,
1199         };
1200
1201         s = kzalloc(sizeof(struct msi2500_state), GFP_KERNEL);
1202         if (s == NULL) {
1203                 pr_err("Could not allocate memory for msi2500_state\n");
1204                 return -ENOMEM;
1205         }
1206
1207         mutex_init(&s->v4l2_lock);
1208         mutex_init(&s->vb_queue_lock);
1209         spin_lock_init(&s->queued_bufs_lock);
1210         INIT_LIST_HEAD(&s->queued_bufs);
1211         s->udev = udev;
1212         s->f_adc = bands[0].rangelow;
1213         s->pixelformat = formats[0].pixelformat;
1214         s->buffersize = formats[0].buffersize;
1215         s->num_formats = NUM_FORMATS;
1216         if (msi2500_emulated_fmt == false)
1217                 s->num_formats -= 2;
1218
1219         /* Init videobuf2 queue structure */
1220         s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1221         s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1222         s->vb_queue.drv_priv = s;
1223         s->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1224         s->vb_queue.ops = &msi2500_vb2_ops;
1225         s->vb_queue.mem_ops = &vb2_vmalloc_memops;
1226         s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1227         ret = vb2_queue_init(&s->vb_queue);
1228         if (ret) {
1229                 dev_err(&s->udev->dev, "Could not initialize vb2 queue\n");
1230                 goto err_free_mem;
1231         }
1232
1233         /* Init video_device structure */
1234         s->vdev = msi2500_template;
1235         s->vdev.queue = &s->vb_queue;
1236         s->vdev.queue->lock = &s->vb_queue_lock;
1237         video_set_drvdata(&s->vdev, s);
1238
1239         /* Register the v4l2_device structure */
1240         s->v4l2_dev.release = msi2500_video_release;
1241         ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
1242         if (ret) {
1243                 dev_err(&s->udev->dev,
1244                                 "Failed to register v4l2-device (%d)\n", ret);
1245                 goto err_free_mem;
1246         }
1247
1248         /* SPI master adapter */
1249         master = spi_alloc_master(&s->udev->dev, 0);
1250         if (master == NULL) {
1251                 ret = -ENOMEM;
1252                 goto err_unregister_v4l2_dev;
1253         }
1254
1255         s->master = master;
1256         master->bus_num = 0;
1257         master->num_chipselect = 1;
1258         master->transfer_one_message = msi2500_transfer_one_message;
1259         spi_master_set_devdata(master, s);
1260         ret = spi_register_master(master);
1261         if (ret) {
1262                 spi_master_put(master);
1263                 goto err_unregister_v4l2_dev;
1264         }
1265
1266         /* load v4l2 subdevice */
1267         sd = v4l2_spi_new_subdev(&s->v4l2_dev, master, &board_info);
1268         s->v4l2_subdev = sd;
1269         if (sd == NULL) {
1270                 dev_err(&s->udev->dev, "cannot get v4l2 subdevice\n");
1271                 ret = -ENODEV;
1272                 goto err_unregister_master;
1273         }
1274
1275         /* Register controls */
1276         v4l2_ctrl_handler_init(&s->hdl, 0);
1277         if (s->hdl.error) {
1278                 ret = s->hdl.error;
1279                 dev_err(&s->udev->dev, "Could not initialize controls\n");
1280                 goto err_free_controls;
1281         }
1282
1283         /* currently all controls are from subdev */
1284         v4l2_ctrl_add_handler(&s->hdl, sd->ctrl_handler, NULL);
1285
1286         s->v4l2_dev.ctrl_handler = &s->hdl;
1287         s->vdev.v4l2_dev = &s->v4l2_dev;
1288         s->vdev.lock = &s->v4l2_lock;
1289
1290         ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
1291         if (ret) {
1292                 dev_err(&s->udev->dev,
1293                                 "Failed to register as video device (%d)\n",
1294                                 ret);
1295                 goto err_unregister_v4l2_dev;
1296         }
1297         dev_info(&s->udev->dev, "Registered as %s\n",
1298                         video_device_node_name(&s->vdev));
1299         dev_notice(&s->udev->dev,
1300                         "%s: SDR API is still slightly experimental and functionality changes may follow\n",
1301                         KBUILD_MODNAME);
1302
1303         return 0;
1304
1305 err_free_controls:
1306         v4l2_ctrl_handler_free(&s->hdl);
1307 err_unregister_master:
1308         spi_unregister_master(s->master);
1309 err_unregister_v4l2_dev:
1310         v4l2_device_unregister(&s->v4l2_dev);
1311 err_free_mem:
1312         kfree(s);
1313         return ret;
1314 }
1315
1316 /* USB device ID list */
1317 static struct usb_device_id msi2500_id_table[] = {
1318         { USB_DEVICE(0x1df7, 0x2500) }, /* Mirics MSi3101 SDR Dongle */
1319         { USB_DEVICE(0x2040, 0xd300) }, /* Hauppauge WinTV 133559 LF */
1320         { }
1321 };
1322 MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1323
1324 /* USB subsystem interface */
1325 static struct usb_driver msi2500_driver = {
1326         .name                     = KBUILD_MODNAME,
1327         .probe                    = msi2500_probe,
1328         .disconnect               = msi2500_disconnect,
1329         .id_table                 = msi2500_id_table,
1330 };
1331
1332 module_usb_driver(msi2500_driver);
1333
1334 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1335 MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1336 MODULE_LICENSE("GPL");