linux/drivers/media/usb/msi2500/msi2500.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Mirics MSi2500 driver
   4 * Mirics MSi3101 SDR Dongle driver
   5 *
   6 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   7 *
   8 * That driver is somehow based of pwc driver:
   9 *  (C) 1999-2004 Nemosoft Unv.
  10 *  (C) 2004-2006 Luc Saillard (luc@saillard.org)
  11 *  (C) 2011 Hans de Goede <hdegoede@redhat.com>
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/slab.h>
  16#include <asm/div64.h>
  17#include <media/v4l2-device.h>
  18#include <media/v4l2-ioctl.h>
  19#include <media/v4l2-ctrls.h>
  20#include <media/v4l2-event.h>
  21#include <linux/usb.h>
  22#include <media/videobuf2-v4l2.h>
  23#include <media/videobuf2-vmalloc.h>
  24#include <linux/spi/spi.h>
  25
  26static bool msi2500_emulated_fmt;
  27module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
  28MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  29
  30/*
  31 *   iConfiguration          0
  32 *     bInterfaceNumber        0
  33 *     bAlternateSetting       1
  34 *     bNumEndpoints           1
  35 *       bEndpointAddress     0x81  EP 1 IN
  36 *       bmAttributes            1
  37 *         Transfer Type            Isochronous
  38 *       wMaxPacketSize     0x1400  3x 1024 bytes
  39 *       bInterval               1
  40 */
  41#define MAX_ISO_BUFS            (8)
  42#define ISO_FRAMES_PER_DESC     (8)
  43#define ISO_MAX_FRAME_SIZE      (3 * 1024)
  44#define ISO_BUFFER_SIZE         (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
  45#define MAX_ISOC_ERRORS         20
  46
  47/*
  48 * TODO: These formats should be moved to V4L2 API. Formats are currently
  49 * disabled from formats[] table, not visible to userspace.
  50 */
  51 /* signed 12-bit */
  52#define MSI2500_PIX_FMT_SDR_S12         v4l2_fourcc('D', 'S', '1', '2')
  53/* Mirics MSi2500 format 384 */
  54#define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
  55
  56static const struct v4l2_frequency_band bands[] = {
  57        {
  58                .tuner = 0,
  59                .type = V4L2_TUNER_ADC,
  60                .index = 0,
  61                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  62                .rangelow   =  1200000,
  63                .rangehigh  = 15000000,
  64        },
  65};
  66
  67/* stream formats */
  68struct msi2500_format {
  69        u32     pixelformat;
  70        u32     buffersize;
  71};
  72
  73/* format descriptions for capture and preview */
  74static struct msi2500_format formats[] = {
  75        {
  76                .pixelformat    = V4L2_SDR_FMT_CS8,
  77                .buffersize     = 3 * 1008,
  78#if 0
  79        }, {
  80                .pixelformat    = MSI2500_PIX_FMT_SDR_MSI2500_384,
  81        }, {
  82                .pixelformat    = MSI2500_PIX_FMT_SDR_S12,
  83#endif
  84        }, {
  85                .pixelformat    = V4L2_SDR_FMT_CS14LE,
  86                .buffersize     = 3 * 1008,
  87        }, {
  88                .pixelformat    = V4L2_SDR_FMT_CU8,
  89                .buffersize     = 3 * 1008,
  90        }, {
  91                .pixelformat    =  V4L2_SDR_FMT_CU16LE,
  92                .buffersize     = 3 * 1008,
  93        },
  94};
  95
  96static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  97
  98/* intermediate buffers with raw data from the USB device */
  99struct msi2500_frame_buf {
 100        /* common v4l buffer stuff -- must be first */
 101        struct vb2_v4l2_buffer vb;
 102        struct list_head list;
 103};
 104
 105struct msi2500_dev {
 106        struct device *dev;
 107        struct video_device vdev;
 108        struct v4l2_device v4l2_dev;
 109        struct v4l2_subdev *v4l2_subdev;
 110        struct spi_master *master;
 111
 112        /* videobuf2 queue and queued buffers list */
 113        struct vb2_queue vb_queue;
 114        struct list_head queued_bufs;
 115        spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 116
 117        /* Note if taking both locks v4l2_lock must always be locked first! */
 118        struct mutex v4l2_lock;      /* Protects everything else */
 119        struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 120
 121        /* Pointer to our usb_device, will be NULL after unplug */
 122        struct usb_device *udev; /* Both mutexes most be hold when setting! */
 123
 124        unsigned int f_adc;
 125        u32 pixelformat;
 126        u32 buffersize;
 127        unsigned int num_formats;
 128
 129        unsigned int isoc_errors; /* number of contiguous ISOC errors */
 130        unsigned int vb_full; /* vb is full and packets dropped */
 131
 132        struct urb *urbs[MAX_ISO_BUFS];
 133
 134        /* Controls */
 135        struct v4l2_ctrl_handler hdl;
 136
 137        u32 next_sample; /* for track lost packets */
 138        u32 sample; /* for sample rate calc */
 139        unsigned long jiffies_next;
 140};
 141
 142/* Private functions */
 143static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
 144                                                        struct msi2500_dev *dev)
 145{
 146        unsigned long flags;
 147        struct msi2500_frame_buf *buf = NULL;
 148
 149        spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 150        if (list_empty(&dev->queued_bufs))
 151                goto leave;
 152
 153        buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
 154        list_del(&buf->list);
 155leave:
 156        spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 157        return buf;
 158}
 159
 160/*
 161 * +===========================================================================
 162 * |   00-1023 | USB packet type '504'
 163 * +===========================================================================
 164 * |   00-  03 | sequence number of first sample in that USB packet
 165 * +---------------------------------------------------------------------------
 166 * |   04-  15 | garbage
 167 * +---------------------------------------------------------------------------
 168 * |   16-1023 | samples
 169 * +---------------------------------------------------------------------------
 170 * signed 8-bit sample
 171 * 504 * 2 = 1008 samples
 172 *
 173 *
 174 * +===========================================================================
 175 * |   00-1023 | USB packet type '384'
 176 * +===========================================================================
 177 * |   00-  03 | sequence number of first sample in that USB packet
 178 * +---------------------------------------------------------------------------
 179 * |   04-  15 | garbage
 180 * +---------------------------------------------------------------------------
 181 * |   16- 175 | samples
 182 * +---------------------------------------------------------------------------
 183 * |  176- 179 | control bits for previous samples
 184 * +---------------------------------------------------------------------------
 185 * |  180- 339 | samples
 186 * +---------------------------------------------------------------------------
 187 * |  340- 343 | control bits for previous samples
 188 * +---------------------------------------------------------------------------
 189 * |  344- 503 | samples
 190 * +---------------------------------------------------------------------------
 191 * |  504- 507 | control bits for previous samples
 192 * +---------------------------------------------------------------------------
 193 * |  508- 667 | samples
 194 * +---------------------------------------------------------------------------
 195 * |  668- 671 | control bits for previous samples
 196 * +---------------------------------------------------------------------------
 197 * |  672- 831 | samples
 198 * +---------------------------------------------------------------------------
 199 * |  832- 835 | control bits for previous samples
 200 * +---------------------------------------------------------------------------
 201 * |  836- 995 | samples
 202 * +---------------------------------------------------------------------------
 203 * |  996- 999 | control bits for previous samples
 204 * +---------------------------------------------------------------------------
 205 * | 1000-1023 | garbage
 206 * +---------------------------------------------------------------------------
 207 *
 208 * Bytes 4 - 7 could have some meaning?
 209 *
 210 * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
 211 * numbers. This results one 2-bit number for 8 samples. It is likely used for
 212 * for bit shifting sample by given bits, increasing actual sampling resolution.
 213 * Number 2 (0b10) was never seen.
 214 *
 215 * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
 216 *
 217 *
 218 * +===========================================================================
 219 * |   00-1023 | USB packet type '336'
 220 * +===========================================================================
 221 * |   00-  03 | sequence number of first sample in that USB packet
 222 * +---------------------------------------------------------------------------
 223 * |   04-  15 | garbage
 224 * +---------------------------------------------------------------------------
 225 * |   16-1023 | samples
 226 * +---------------------------------------------------------------------------
 227 * signed 12-bit sample
 228 *
 229 *
 230 * +===========================================================================
 231 * |   00-1023 | USB packet type '252'
 232 * +===========================================================================
 233 * |   00-  03 | sequence number of first sample in that USB packet
 234 * +---------------------------------------------------------------------------
 235 * |   04-  15 | garbage
 236 * +---------------------------------------------------------------------------
 237 * |   16-1023 | samples
 238 * +---------------------------------------------------------------------------
 239 * signed 14-bit sample
 240 */
 241
 242static int msi2500_convert_stream(struct msi2500_dev *dev, u8 *dst, u8 *src,
 243                                  unsigned int src_len)
 244{
 245        unsigned int i, j, transactions, dst_len = 0;
 246        u32 sample[3];
 247
 248        /* There could be 1-3 1024 byte transactions per packet */
 249        transactions = src_len / 1024;
 250
 251        for (i = 0; i < transactions; i++) {
 252                sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
 253                                src[0] << 0;
 254                if (i == 0 && dev->next_sample != sample[0]) {
 255                        dev_dbg_ratelimited(dev->dev,
 256                                            "%d samples lost, %d %08x:%08x\n",
 257                                            sample[0] - dev->next_sample,
 258                                            src_len, dev->next_sample,
 259                                            sample[0]);
 260                }
 261
 262                /*
 263                 * Dump all unknown 'garbage' data - maybe we will discover
 264                 * someday if there is something rational...
 265                 */
 266                dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
 267
 268                src += 16; /* skip header */
 269
 270                switch (dev->pixelformat) {
 271                case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
 272                {
 273                        s8 *s8src = (s8 *)src;
 274                        u8 *u8dst = (u8 *)dst;
 275
 276                        for (j = 0; j < 1008; j++)
 277                                *u8dst++ = *s8src++ + 128;
 278
 279                        src += 1008;
 280                        dst += 1008;
 281                        dst_len += 1008;
 282                        dev->next_sample = sample[i] + 504;
 283                        break;
 284                }
 285                case  V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
 286                {
 287                        s16 *s16src = (s16 *)src;
 288                        u16 *u16dst = (u16 *)dst;
 289                        struct {signed int x:14; } se; /* sign extension */
 290                        unsigned int utmp;
 291
 292                        for (j = 0; j < 1008; j += 2) {
 293                                /* sign extension from 14-bit to signed int */
 294                                se.x = *s16src++;
 295                                /* from signed int to unsigned int */
 296                                utmp = se.x + 8192;
 297                                /* from 14-bit to 16-bit */
 298                                *u16dst++ = utmp << 2 | utmp >> 12;
 299                        }
 300
 301                        src += 1008;
 302                        dst += 1008;
 303                        dst_len += 1008;
 304                        dev->next_sample = sample[i] + 252;
 305                        break;
 306                }
 307                case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
 308                        /* Dump unknown 'garbage' data */
 309                        dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
 310                        memcpy(dst, src, 984);
 311                        src += 984 + 24;
 312                        dst += 984;
 313                        dst_len += 984;
 314                        dev->next_sample = sample[i] + 384;
 315                        break;
 316                case V4L2_SDR_FMT_CS8:         /* 504 x IQ samples */
 317                        memcpy(dst, src, 1008);
 318                        src += 1008;
 319                        dst += 1008;
 320                        dst_len += 1008;
 321                        dev->next_sample = sample[i] + 504;
 322                        break;
 323                case MSI2500_PIX_FMT_SDR_S12:  /* 336 x IQ samples */
 324                        memcpy(dst, src, 1008);
 325                        src += 1008;
 326                        dst += 1008;
 327                        dst_len += 1008;
 328                        dev->next_sample = sample[i] + 336;
 329                        break;
 330                case V4L2_SDR_FMT_CS14LE:      /* 252 x IQ samples */
 331                        memcpy(dst, src, 1008);
 332                        src += 1008;
 333                        dst += 1008;
 334                        dst_len += 1008;
 335                        dev->next_sample = sample[i] + 252;
 336                        break;
 337                default:
 338                        break;
 339                }
 340        }
 341
 342        /* calculate sample rate and output it in 10 seconds intervals */
 343        if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 344                #define MSECS 10000UL
 345                unsigned int msecs = jiffies_to_msecs(jiffies -
 346                                dev->jiffies_next + msecs_to_jiffies(MSECS));
 347                unsigned int samples = dev->next_sample - dev->sample;
 348
 349                dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 350                dev->sample = dev->next_sample;
 351                dev_dbg(dev->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
 352                        src_len, samples, msecs,
 353                        samples * 1000UL / msecs);
 354        }
 355
 356        return dst_len;
 357}
 358
 359/*
 360 * This gets called for the Isochronous pipe (stream). This is done in interrupt
 361 * time, so it has to be fast, not crash, and not stall. Neat.
 362 */
 363static void msi2500_isoc_handler(struct urb *urb)
 364{
 365        struct msi2500_dev *dev = (struct msi2500_dev *)urb->context;
 366        int i, flen, fstatus;
 367        unsigned char *iso_buf = NULL;
 368        struct msi2500_frame_buf *fbuf;
 369
 370        if (unlikely(urb->status == -ENOENT ||
 371                     urb->status == -ECONNRESET ||
 372                     urb->status == -ESHUTDOWN)) {
 373                dev_dbg(dev->dev, "URB (%p) unlinked %ssynchronously\n",
 374                        urb, urb->status == -ENOENT ? "" : "a");
 375                return;
 376        }
 377
 378        if (unlikely(urb->status != 0)) {
 379                dev_dbg(dev->dev, "called with status %d\n", urb->status);
 380                /* Give up after a number of contiguous errors */
 381                if (++dev->isoc_errors > MAX_ISOC_ERRORS)
 382                        dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
 383                goto handler_end;
 384        } else {
 385                /* Reset ISOC error counter. We did get here, after all. */
 386                dev->isoc_errors = 0;
 387        }
 388
 389        /* Compact data */
 390        for (i = 0; i < urb->number_of_packets; i++) {
 391                void *ptr;
 392
 393                /* Check frame error */
 394                fstatus = urb->iso_frame_desc[i].status;
 395                if (unlikely(fstatus)) {
 396                        dev_dbg_ratelimited(dev->dev,
 397                                            "frame=%d/%d has error %d skipping\n",
 398                                            i, urb->number_of_packets, fstatus);
 399                        continue;
 400                }
 401
 402                /* Check if that frame contains data */
 403                flen = urb->iso_frame_desc[i].actual_length;
 404                if (unlikely(flen == 0))
 405                        continue;
 406
 407                iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
 408
 409                /* Get free framebuffer */
 410                fbuf = msi2500_get_next_fill_buf(dev);
 411                if (unlikely(fbuf == NULL)) {
 412                        dev->vb_full++;
 413                        dev_dbg_ratelimited(dev->dev,
 414                                            "videobuf is full, %d packets dropped\n",
 415                                            dev->vb_full);
 416                        continue;
 417                }
 418
 419                /* fill framebuffer */
 420                ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 421                flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
 422                vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
 423                vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 424        }
 425
 426handler_end:
 427        i = usb_submit_urb(urb, GFP_ATOMIC);
 428        if (unlikely(i != 0))
 429                dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
 430}
 431
 432static void msi2500_iso_stop(struct msi2500_dev *dev)
 433{
 434        int i;
 435
 436        dev_dbg(dev->dev, "\n");
 437
 438        /* Unlinking ISOC buffers one by one */
 439        for (i = 0; i < MAX_ISO_BUFS; i++) {
 440                if (dev->urbs[i]) {
 441                        dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
 442                        usb_kill_urb(dev->urbs[i]);
 443                }
 444        }
 445}
 446
 447static void msi2500_iso_free(struct msi2500_dev *dev)
 448{
 449        int i;
 450
 451        dev_dbg(dev->dev, "\n");
 452
 453        /* Freeing ISOC buffers one by one */
 454        for (i = 0; i < MAX_ISO_BUFS; i++) {
 455                if (dev->urbs[i]) {
 456                        dev_dbg(dev->dev, "Freeing URB\n");
 457                        if (dev->urbs[i]->transfer_buffer) {
 458                                usb_free_coherent(dev->udev,
 459                                        dev->urbs[i]->transfer_buffer_length,
 460                                        dev->urbs[i]->transfer_buffer,
 461                                        dev->urbs[i]->transfer_dma);
 462                        }
 463                        usb_free_urb(dev->urbs[i]);
 464                        dev->urbs[i] = NULL;
 465                }
 466        }
 467}
 468
 469/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 470static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
 471{
 472        dev_dbg(dev->dev, "\n");
 473
 474        msi2500_iso_stop(dev);
 475        msi2500_iso_free(dev);
 476}
 477
 478/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
 479static int msi2500_isoc_init(struct msi2500_dev *dev)
 480{
 481        struct urb *urb;
 482        int i, j, ret;
 483
 484        dev_dbg(dev->dev, "\n");
 485
 486        dev->isoc_errors = 0;
 487
 488        ret = usb_set_interface(dev->udev, 0, 1);
 489        if (ret)
 490                return ret;
 491
 492        /* Allocate and init Isochronuous urbs */
 493        for (i = 0; i < MAX_ISO_BUFS; i++) {
 494                urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
 495                if (urb == NULL) {
 496                        msi2500_isoc_cleanup(dev);
 497                        return -ENOMEM;
 498                }
 499                dev->urbs[i] = urb;
 500                dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
 501
 502                urb->interval = 1;
 503                urb->dev = dev->udev;
 504                urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
 505                urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
 506                urb->transfer_buffer = usb_alloc_coherent(dev->udev,
 507                                ISO_BUFFER_SIZE,
 508                                GFP_KERNEL, &urb->transfer_dma);
 509                if (urb->transfer_buffer == NULL) {
 510                        dev_err(dev->dev,
 511                                "Failed to allocate urb buffer %d\n", i);
 512                        msi2500_isoc_cleanup(dev);
 513                        return -ENOMEM;
 514                }
 515                urb->transfer_buffer_length = ISO_BUFFER_SIZE;
 516                urb->complete = msi2500_isoc_handler;
 517                urb->context = dev;
 518                urb->start_frame = 0;
 519                urb->number_of_packets = ISO_FRAMES_PER_DESC;
 520                for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
 521                        urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
 522                        urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
 523                }
 524        }
 525
 526        /* link */
 527        for (i = 0; i < MAX_ISO_BUFS; i++) {
 528                ret = usb_submit_urb(dev->urbs[i], GFP_KERNEL);
 529                if (ret) {
 530                        dev_err(dev->dev,
 531                                "usb_submit_urb %d failed with error %d\n",
 532                                i, ret);
 533                        msi2500_isoc_cleanup(dev);
 534                        return ret;
 535                }
 536                dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
 537        }
 538
 539        /* All is done... */
 540        return 0;
 541}
 542
 543/* Must be called with vb_queue_lock hold */
 544static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
 545{
 546        unsigned long flags;
 547
 548        dev_dbg(dev->dev, "\n");
 549
 550        spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 551        while (!list_empty(&dev->queued_bufs)) {
 552                struct msi2500_frame_buf *buf;
 553
 554                buf = list_entry(dev->queued_bufs.next,
 555                                 struct msi2500_frame_buf, list);
 556                list_del(&buf->list);
 557                vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 558        }
 559        spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 560}
 561
 562/* The user yanked out the cable... */
 563static void msi2500_disconnect(struct usb_interface *intf)
 564{
 565        struct v4l2_device *v = usb_get_intfdata(intf);
 566        struct msi2500_dev *dev =
 567                        container_of(v, struct msi2500_dev, v4l2_dev);
 568
 569        dev_dbg(dev->dev, "\n");
 570
 571        mutex_lock(&dev->vb_queue_lock);
 572        mutex_lock(&dev->v4l2_lock);
 573        /* No need to keep the urbs around after disconnection */
 574        dev->udev = NULL;
 575        v4l2_device_disconnect(&dev->v4l2_dev);
 576        video_unregister_device(&dev->vdev);
 577        spi_unregister_master(dev->master);
 578        mutex_unlock(&dev->v4l2_lock);
 579        mutex_unlock(&dev->vb_queue_lock);
 580
 581        v4l2_device_put(&dev->v4l2_dev);
 582}
 583
 584static int msi2500_querycap(struct file *file, void *fh,
 585                            struct v4l2_capability *cap)
 586{
 587        struct msi2500_dev *dev = video_drvdata(file);
 588
 589        dev_dbg(dev->dev, "\n");
 590
 591        strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 592        strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 593        usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 594        return 0;
 595}
 596
 597/* Videobuf2 operations */
 598static int msi2500_queue_setup(struct vb2_queue *vq,
 599                               unsigned int *nbuffers,
 600                               unsigned int *nplanes, unsigned int sizes[],
 601                               struct device *alloc_devs[])
 602{
 603        struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 604
 605        dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
 606
 607        /* Absolute min and max number of buffers available for mmap() */
 608        *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
 609        *nplanes = 1;
 610        sizes[0] = PAGE_ALIGN(dev->buffersize);
 611        dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 612        return 0;
 613}
 614
 615static void msi2500_buf_queue(struct vb2_buffer *vb)
 616{
 617        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 618        struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 619        struct msi2500_frame_buf *buf = container_of(vbuf,
 620                                                     struct msi2500_frame_buf,
 621                                                     vb);
 622        unsigned long flags;
 623
 624        /* Check the device has not disconnected between prep and queuing */
 625        if (unlikely(!dev->udev)) {
 626                vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 627                return;
 628        }
 629
 630        spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 631        list_add_tail(&buf->list, &dev->queued_bufs);
 632        spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 633}
 634
 635#define CMD_WREG               0x41
 636#define CMD_START_STREAMING    0x43
 637#define CMD_STOP_STREAMING     0x45
 638#define CMD_READ_UNKNOWN       0x48
 639
 640#define msi2500_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
 641        char *_direction; \
 642        if (_t & USB_DIR_IN) \
 643                _direction = "<<<"; \
 644        else \
 645                _direction = ">>>"; \
 646        dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
 647                        _t, _r, _v & 0xff, _v >> 8, _i & 0xff, _i >> 8, \
 648                        _l & 0xff, _l >> 8, _direction, _l, _b); \
 649}
 650
 651static int msi2500_ctrl_msg(struct msi2500_dev *dev, u8 cmd, u32 data)
 652{
 653        int ret;
 654        u8 request = cmd;
 655        u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
 656        u16 value = (data >> 0) & 0xffff;
 657        u16 index = (data >> 16) & 0xffff;
 658
 659        msi2500_dbg_usb_control_msg(dev->dev, request, requesttype,
 660                                    value, index, NULL, 0);
 661        ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
 662                              requesttype, value, index, NULL, 0, 2000);
 663        if (ret)
 664                dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
 665                        ret, cmd, data);
 666
 667        return ret;
 668}
 669
 670static int msi2500_set_usb_adc(struct msi2500_dev *dev)
 671{
 672        int ret;
 673        unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
 674        u32 reg3, reg4, reg7;
 675        struct v4l2_ctrl *bandwidth_auto;
 676        struct v4l2_ctrl *bandwidth;
 677
 678        f_sr = dev->f_adc;
 679
 680        /* set tuner, subdev, filters according to sampling rate */
 681        bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 682                        V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 683        if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 684                bandwidth = v4l2_ctrl_find(&dev->hdl,
 685                                V4L2_CID_RF_TUNER_BANDWIDTH);
 686                v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 687        }
 688
 689        /* select stream format */
 690        switch (dev->pixelformat) {
 691        case V4L2_SDR_FMT_CU8:
 692                reg7 = 0x000c9407; /* 504 */
 693                break;
 694        case  V4L2_SDR_FMT_CU16LE:
 695                reg7 = 0x00009407; /* 252 */
 696                break;
 697        case V4L2_SDR_FMT_CS8:
 698                reg7 = 0x000c9407; /* 504 */
 699                break;
 700        case MSI2500_PIX_FMT_SDR_MSI2500_384:
 701                reg7 = 0x0000a507; /* 384 */
 702                break;
 703        case MSI2500_PIX_FMT_SDR_S12:
 704                reg7 = 0x00008507; /* 336 */
 705                break;
 706        case V4L2_SDR_FMT_CS14LE:
 707                reg7 = 0x00009407; /* 252 */
 708                break;
 709        default:
 710                reg7 = 0x000c9407; /* 504 */
 711                break;
 712        }
 713
 714        /*
 715         * Fractional-N synthesizer
 716         *
 717         *           +----------------------------------------+
 718         *           v                                        |
 719         *  Fref   +----+     +-------+     +-----+         +------+     +---+
 720         * ------> | PD | --> |  VCO  | --> | /2  | ------> | /N.F | <-- | K |
 721         *         +----+     +-------+     +-----+         +------+     +---+
 722         *                      |
 723         *                      |
 724         *                      v
 725         *                    +-------+     +-----+  Fout
 726         *                    | /Rout | --> | /12 | ------>
 727         *                    +-------+     +-----+
 728         */
 729        /*
 730         * Synthesizer config is just a educated guess...
 731         *
 732         * [7:0]   0x03, register address
 733         * [8]     1, power control
 734         * [9]     ?, power control
 735         * [12:10] output divider
 736         * [13]    0 ?
 737         * [14]    0 ?
 738         * [15]    fractional MSB, bit 20
 739         * [16:19] N
 740         * [23:20] ?
 741         * [24:31] 0x01
 742         *
 743         * output divider
 744         * val   div
 745         *   0     - (invalid)
 746         *   1     4
 747         *   2     6
 748         *   3     8
 749         *   4    10
 750         *   5    12
 751         *   6    14
 752         *   7    16
 753         *
 754         * VCO 202000000 - 720000000++
 755         */
 756
 757        #define F_REF 24000000
 758        #define DIV_PRE_N 2
 759        #define DIV_LO_OUT 12
 760        reg3 = 0x01000303;
 761        reg4 = 0x00000004;
 762
 763        /* XXX: Filters? AGC? VCO band? */
 764        if (f_sr < 6000000)
 765                reg3 |= 0x1 << 20;
 766        else if (f_sr < 7000000)
 767                reg3 |= 0x5 << 20;
 768        else if (f_sr < 8500000)
 769                reg3 |= 0x9 << 20;
 770        else
 771                reg3 |= 0xd << 20;
 772
 773        for (div_out = 4; div_out < 16; div_out += 2) {
 774                f_vco = f_sr * div_out * DIV_LO_OUT;
 775                dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
 776                if (f_vco >= 202000000)
 777                        break;
 778        }
 779
 780        /* Calculate PLL integer and fractional control word. */
 781        div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
 782        k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
 783
 784        reg3 |= div_n << 16;
 785        reg3 |= (div_out / 2 - 1) << 10;
 786        reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
 787        reg4 |= ((k_cw >>  0) & 0x0fffff) <<  8; /* [19:0] */
 788
 789        dev_dbg(dev->dev,
 790                "f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
 791                f_sr, f_vco, div_n, k, div_out, reg3, reg4);
 792
 793        ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
 794        if (ret)
 795                goto err;
 796
 797        ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
 798        if (ret)
 799                goto err;
 800
 801        ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
 802        if (ret)
 803                goto err;
 804
 805        ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
 806        if (ret)
 807                goto err;
 808
 809        ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
 810        if (ret)
 811                goto err;
 812
 813        ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
 814        if (ret)
 815                goto err;
 816
 817        ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
 818        if (ret)
 819                goto err;
 820
 821        ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
 822err:
 823        return ret;
 824}
 825
 826static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
 827{
 828        struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 829        int ret;
 830
 831        dev_dbg(dev->dev, "\n");
 832
 833        if (!dev->udev)
 834                return -ENODEV;
 835
 836        if (mutex_lock_interruptible(&dev->v4l2_lock))
 837                return -ERESTARTSYS;
 838
 839        /* wake-up tuner */
 840        v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 841
 842        ret = msi2500_set_usb_adc(dev);
 843
 844        ret = msi2500_isoc_init(dev);
 845        if (ret)
 846                msi2500_cleanup_queued_bufs(dev);
 847
 848        ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
 849
 850        mutex_unlock(&dev->v4l2_lock);
 851
 852        return ret;
 853}
 854
 855static void msi2500_stop_streaming(struct vb2_queue *vq)
 856{
 857        struct msi2500_dev *dev = vb2_get_drv_priv(vq);
 858
 859        dev_dbg(dev->dev, "\n");
 860
 861        mutex_lock(&dev->v4l2_lock);
 862
 863        if (dev->udev)
 864                msi2500_isoc_cleanup(dev);
 865
 866        msi2500_cleanup_queued_bufs(dev);
 867
 868        /* according to tests, at least 700us delay is required  */
 869        msleep(20);
 870        if (!msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
 871                /* sleep USB IF / ADC */
 872                msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
 873        }
 874
 875        /* sleep tuner */
 876        v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 877
 878        mutex_unlock(&dev->v4l2_lock);
 879}
 880
 881static const struct vb2_ops msi2500_vb2_ops = {
 882        .queue_setup            = msi2500_queue_setup,
 883        .buf_queue              = msi2500_buf_queue,
 884        .start_streaming        = msi2500_start_streaming,
 885        .stop_streaming         = msi2500_stop_streaming,
 886        .wait_prepare           = vb2_ops_wait_prepare,
 887        .wait_finish            = vb2_ops_wait_finish,
 888};
 889
 890static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
 891                                    struct v4l2_fmtdesc *f)
 892{
 893        struct msi2500_dev *dev = video_drvdata(file);
 894
 895        dev_dbg(dev->dev, "index=%d\n", f->index);
 896
 897        if (f->index >= dev->num_formats)
 898                return -EINVAL;
 899
 900        f->pixelformat = formats[f->index].pixelformat;
 901
 902        return 0;
 903}
 904
 905static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
 906                                 struct v4l2_format *f)
 907{
 908        struct msi2500_dev *dev = video_drvdata(file);
 909
 910        dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 911                (char *)&dev->pixelformat);
 912
 913        f->fmt.sdr.pixelformat = dev->pixelformat;
 914        f->fmt.sdr.buffersize = dev->buffersize;
 915        memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 916
 917        return 0;
 918}
 919
 920static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
 921                                 struct v4l2_format *f)
 922{
 923        struct msi2500_dev *dev = video_drvdata(file);
 924        struct vb2_queue *q = &dev->vb_queue;
 925        int i;
 926
 927        dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 928                (char *)&f->fmt.sdr.pixelformat);
 929
 930        if (vb2_is_busy(q))
 931                return -EBUSY;
 932
 933        memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 934        for (i = 0; i < dev->num_formats; i++) {
 935                if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 936                        dev->pixelformat = formats[i].pixelformat;
 937                        dev->buffersize = formats[i].buffersize;
 938                        f->fmt.sdr.buffersize = formats[i].buffersize;
 939                        return 0;
 940                }
 941        }
 942
 943        dev->pixelformat = formats[0].pixelformat;
 944        dev->buffersize = formats[0].buffersize;
 945        f->fmt.sdr.pixelformat = formats[0].pixelformat;
 946        f->fmt.sdr.buffersize = formats[0].buffersize;
 947
 948        return 0;
 949}
 950
 951static int msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
 952                                   struct v4l2_format *f)
 953{
 954        struct msi2500_dev *dev = video_drvdata(file);
 955        int i;
 956
 957        dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
 958                (char *)&f->fmt.sdr.pixelformat);
 959
 960        memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
 961        for (i = 0; i < dev->num_formats; i++) {
 962                if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
 963                        f->fmt.sdr.buffersize = formats[i].buffersize;
 964                        return 0;
 965                }
 966        }
 967
 968        f->fmt.sdr.pixelformat = formats[0].pixelformat;
 969        f->fmt.sdr.buffersize = formats[0].buffersize;
 970
 971        return 0;
 972}
 973
 974static int msi2500_s_tuner(struct file *file, void *priv,
 975                           const struct v4l2_tuner *v)
 976{
 977        struct msi2500_dev *dev = video_drvdata(file);
 978        int ret;
 979
 980        dev_dbg(dev->dev, "index=%d\n", v->index);
 981
 982        if (v->index == 0)
 983                ret = 0;
 984        else if (v->index == 1)
 985                ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 986        else
 987                ret = -EINVAL;
 988
 989        return ret;
 990}
 991
 992static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
 993{
 994        struct msi2500_dev *dev = video_drvdata(file);
 995        int ret;
 996
 997        dev_dbg(dev->dev, "index=%d\n", v->index);
 998
 999        if (v->index == 0) {
1000                strscpy(v->name, "Mirics MSi2500", sizeof(v->name));
1001                v->type = V4L2_TUNER_ADC;
1002                v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1003                v->rangelow =   1200000;
1004                v->rangehigh = 15000000;
1005                ret = 0;
1006        } else if (v->index == 1) {
1007                ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1008        } else {
1009                ret = -EINVAL;
1010        }
1011
1012        return ret;
1013}
1014
1015static int msi2500_g_frequency(struct file *file, void *priv,
1016                               struct v4l2_frequency *f)
1017{
1018        struct msi2500_dev *dev = video_drvdata(file);
1019        int ret  = 0;
1020
1021        dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1022
1023        if (f->tuner == 0) {
1024                f->frequency = dev->f_adc;
1025                ret = 0;
1026        } else if (f->tuner == 1) {
1027                f->type = V4L2_TUNER_RF;
1028                ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1029        } else {
1030                ret = -EINVAL;
1031        }
1032
1033        return ret;
1034}
1035
1036static int msi2500_s_frequency(struct file *file, void *priv,
1037                               const struct v4l2_frequency *f)
1038{
1039        struct msi2500_dev *dev = video_drvdata(file);
1040        int ret;
1041
1042        dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
1043                f->tuner, f->type, f->frequency);
1044
1045        if (f->tuner == 0) {
1046                dev->f_adc = clamp_t(unsigned int, f->frequency,
1047                                     bands[0].rangelow,
1048                                     bands[0].rangehigh);
1049                dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1050                ret = msi2500_set_usb_adc(dev);
1051        } else if (f->tuner == 1) {
1052                ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1053        } else {
1054                ret = -EINVAL;
1055        }
1056
1057        return ret;
1058}
1059
1060static int msi2500_enum_freq_bands(struct file *file, void *priv,
1061                                   struct v4l2_frequency_band *band)
1062{
1063        struct msi2500_dev *dev = video_drvdata(file);
1064        int ret;
1065
1066        dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
1067                band->tuner, band->type, band->index);
1068
1069        if (band->tuner == 0) {
1070                if (band->index >= ARRAY_SIZE(bands)) {
1071                        ret = -EINVAL;
1072                } else {
1073                        *band = bands[band->index];
1074                        ret = 0;
1075                }
1076        } else if (band->tuner == 1) {
1077                ret = v4l2_subdev_call(dev->v4l2_subdev, tuner,
1078                                       enum_freq_bands, band);
1079        } else {
1080                ret = -EINVAL;
1081        }
1082
1083        return ret;
1084}
1085
1086static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
1087        .vidioc_querycap          = msi2500_querycap,
1088
1089        .vidioc_enum_fmt_sdr_cap  = msi2500_enum_fmt_sdr_cap,
1090        .vidioc_g_fmt_sdr_cap     = msi2500_g_fmt_sdr_cap,
1091        .vidioc_s_fmt_sdr_cap     = msi2500_s_fmt_sdr_cap,
1092        .vidioc_try_fmt_sdr_cap   = msi2500_try_fmt_sdr_cap,
1093
1094        .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1095        .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1096        .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1097        .vidioc_querybuf          = vb2_ioctl_querybuf,
1098        .vidioc_qbuf              = vb2_ioctl_qbuf,
1099        .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1100
1101        .vidioc_streamon          = vb2_ioctl_streamon,
1102        .vidioc_streamoff         = vb2_ioctl_streamoff,
1103
1104        .vidioc_g_tuner           = msi2500_g_tuner,
1105        .vidioc_s_tuner           = msi2500_s_tuner,
1106
1107        .vidioc_g_frequency       = msi2500_g_frequency,
1108        .vidioc_s_frequency       = msi2500_s_frequency,
1109        .vidioc_enum_freq_bands   = msi2500_enum_freq_bands,
1110
1111        .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1112        .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1113        .vidioc_log_status        = v4l2_ctrl_log_status,
1114};
1115
1116static const struct v4l2_file_operations msi2500_fops = {
1117        .owner                    = THIS_MODULE,
1118        .open                     = v4l2_fh_open,
1119        .release                  = vb2_fop_release,
1120        .read                     = vb2_fop_read,
1121        .poll                     = vb2_fop_poll,
1122        .mmap                     = vb2_fop_mmap,
1123        .unlocked_ioctl           = video_ioctl2,
1124};
1125
1126static const struct video_device msi2500_template = {
1127        .name                     = "Mirics MSi3101 SDR Dongle",
1128        .release                  = video_device_release_empty,
1129        .fops                     = &msi2500_fops,
1130        .ioctl_ops                = &msi2500_ioctl_ops,
1131};
1132
1133static void msi2500_video_release(struct v4l2_device *v)
1134{
1135        struct msi2500_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
1136
1137        v4l2_ctrl_handler_free(&dev->hdl);
1138        v4l2_device_unregister(&dev->v4l2_dev);
1139        kfree(dev);
1140}
1141
1142static int msi2500_transfer_one_message(struct spi_master *master,
1143                                        struct spi_message *m)
1144{
1145        struct msi2500_dev *dev = 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(dev->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(dev, CMD_WREG, data);
1157        }
1158
1159        m->status = ret;
1160        spi_finalize_current_message(master);
1161        return ret;
1162}
1163
1164static int msi2500_probe(struct usb_interface *intf,
1165                         const struct usb_device_id *id)
1166{
1167        struct msi2500_dev *dev;
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        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1179        if (!dev) {
1180                ret = -ENOMEM;
1181                goto err;
1182        }
1183
1184        mutex_init(&dev->v4l2_lock);
1185        mutex_init(&dev->vb_queue_lock);
1186        spin_lock_init(&dev->queued_bufs_lock);
1187        INIT_LIST_HEAD(&dev->queued_bufs);
1188        dev->dev = &intf->dev;
1189        dev->udev = interface_to_usbdev(intf);
1190        dev->f_adc = bands[0].rangelow;
1191        dev->pixelformat = formats[0].pixelformat;
1192        dev->buffersize = formats[0].buffersize;
1193        dev->num_formats = NUM_FORMATS;
1194        if (!msi2500_emulated_fmt)
1195                dev->num_formats -= 2;
1196
1197        /* Init videobuf2 queue structure */
1198        dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1199        dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1200        dev->vb_queue.drv_priv = dev;
1201        dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
1202        dev->vb_queue.ops = &msi2500_vb2_ops;
1203        dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1204        dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1205        ret = vb2_queue_init(&dev->vb_queue);
1206        if (ret) {
1207                dev_err(dev->dev, "Could not initialize vb2 queue\n");
1208                goto err_free_mem;
1209        }
1210
1211        /* Init video_device structure */
1212        dev->vdev = msi2500_template;
1213        dev->vdev.queue = &dev->vb_queue;
1214        dev->vdev.queue->lock = &dev->vb_queue_lock;
1215        video_set_drvdata(&dev->vdev, dev);
1216
1217        /* Register the v4l2_device structure */
1218        dev->v4l2_dev.release = msi2500_video_release;
1219        ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
1220        if (ret) {
1221                dev_err(dev->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(dev->dev, 0);
1227        if (master == NULL) {
1228                ret = -ENOMEM;
1229                goto err_unregister_v4l2_dev;
1230        }
1231
1232        dev->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, dev);
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(&dev->v4l2_dev, master, &board_info);
1245        dev->v4l2_subdev = sd;
1246        if (sd == NULL) {
1247                dev_err(dev->dev, "cannot get v4l2 subdevice\n");
1248                ret = -ENODEV;
1249                goto err_unregister_master;
1250        }
1251
1252        /* Register controls */
1253        v4l2_ctrl_handler_init(&dev->hdl, 0);
1254        if (dev->hdl.error) {
1255                ret = dev->hdl.error;
1256                dev_err(dev->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(&dev->hdl, sd->ctrl_handler, NULL, true);
1262
1263        dev->v4l2_dev.ctrl_handler = &dev->hdl;
1264        dev->vdev.v4l2_dev = &dev->v4l2_dev;
1265        dev->vdev.lock = &dev->v4l2_lock;
1266        dev->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1267                                V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
1268
1269        ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1270        if (ret) {
1271                dev_err(dev->dev,
1272                        "Failed to register as video device (%d)\n", ret);
1273                goto err_unregister_v4l2_dev;
1274        }
1275        dev_info(dev->dev, "Registered as %s\n",
1276                 video_device_node_name(&dev->vdev));
1277        dev_notice(dev->dev,
1278                   "SDR API is still slightly experimental and functionality changes may follow\n");
1279        return 0;
1280err_free_controls:
1281        v4l2_ctrl_handler_free(&dev->hdl);
1282err_unregister_master:
1283        spi_unregister_master(dev->master);
1284err_unregister_v4l2_dev:
1285        v4l2_device_unregister(&dev->v4l2_dev);
1286err_free_mem:
1287        kfree(dev);
1288err:
1289        return ret;
1290}
1291
1292/* USB device ID list */
1293static const struct usb_device_id msi2500_id_table[] = {
1294        {USB_DEVICE(0x1df7, 0x2500)}, /* Mirics MSi3101 SDR Dongle */
1295        {USB_DEVICE(0x2040, 0xd300)}, /* Hauppauge WinTV 133559 LF */
1296        {}
1297};
1298MODULE_DEVICE_TABLE(usb, msi2500_id_table);
1299
1300/* USB subsystem interface */
1301static struct usb_driver msi2500_driver = {
1302        .name                     = KBUILD_MODNAME,
1303        .probe                    = msi2500_probe,
1304        .disconnect               = msi2500_disconnect,
1305        .id_table                 = msi2500_id_table,
1306};
1307
1308module_usb_driver(msi2500_driver);
1309
1310MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1311MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
1312MODULE_LICENSE("GPL");
1313