drivers/media/dvb-frontends/rtl2832_sdr.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Realtek RTL2832U SDR driver
   4  *
   5  * Copyright (C) 2013 Antti Palosaari <[email protected]>
   6  *
   7  * GNU Radio plugin "gr-kernel" for device usage will be on:
   8  * https://git.linuxtv.org/anttip/gr-kernel.git
   9  */
  10
  11 #include "rtl2832_sdr.h"
  12 #include "dvb_usb.h"
  13
  14 #include <media/v4l2-device.h>
  15 #include <media/v4l2-ioctl.h>
  16 #include <media/v4l2-ctrls.h>
  17 #include <media/v4l2-event.h>
  18 #include <media/videobuf2-v4l2.h>
  19 #include <media/videobuf2-vmalloc.h>
  20
  21 #include <linux/platform_device.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/math64.h>
  24 #include <linux/regmap.h>
  25
  26 static bool rtl2832_sdr_emulated_fmt;
  27 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
  28 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  29
  30 /* Original macro does not contain enough null pointer checks for our need */
  31 #define V4L2_SUBDEV_HAS_OP(sd, o, f) \
  32         ((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
  33
  34 #define MAX_BULK_BUFS            (10)
  35 #define BULK_BUFFER_SIZE         (128 * 512)
  36
  37 static const struct v4l2_frequency_band bands_adc[] = {
  38         {
  39                 .tuner = 0,
  40                 .type = V4L2_TUNER_ADC,
  41                 .index = 0,
  42                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  43                 .rangelow   =  300000,
  44                 .rangehigh  =  300000,
  45         },
  46         {
  47                 .tuner = 0,
  48                 .type = V4L2_TUNER_ADC,
  49                 .index = 1,
  50                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  51                 .rangelow   =  900001,
  52                 .rangehigh  = 2800000,
  53         },
  54         {
  55                 .tuner = 0,
  56                 .type = V4L2_TUNER_ADC,
  57                 .index = 2,
  58                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  59                 .rangelow   = 3200000,
  60                 .rangehigh  = 3200000,
  61         },
  62 };
  63
  64 static const struct v4l2_frequency_band bands_fm[] = {
  65         {
  66                 .tuner = 1,
  67                 .type = V4L2_TUNER_RF,
  68                 .index = 0,
  69                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  70                 .rangelow   =    50000000,
  71                 .rangehigh  =  2000000000,
  72         },
  73 };
  74
  75 /* stream formats */
  76 struct rtl2832_sdr_format {
  77         char    *name;
  78         u32     pixelformat;
  79         u32     buffersize;
  80 };
  81
  82 static struct rtl2832_sdr_format formats[] = {
  83         {
  84                 .pixelformat    = V4L2_SDR_FMT_CU8,
  85                 .buffersize     = BULK_BUFFER_SIZE,
  86         }, {
  87                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
  88                 .buffersize     = BULK_BUFFER_SIZE * 2,
  89         },
  90 };
  91
  92 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  93
  94 /* intermediate buffers with raw data from the USB device */
  95 struct rtl2832_sdr_frame_buf {
  96         /* common v4l buffer stuff -- must be first */
  97         struct vb2_v4l2_buffer vb;
  98         struct list_head list;
  99 };
 100
 101 struct rtl2832_sdr_dev {
 102 #define POWER_ON           0  /* BIT(0) */
 103 #define URB_BUF            1  /* BIT(1) */
 104         unsigned long flags;
 105
 106         struct platform_device *pdev;
 107         struct regmap *regmap;
 108
 109         struct video_device vdev;
 110         struct v4l2_device v4l2_dev;
 111         struct v4l2_subdev *v4l2_subdev;
 112
 113         /* videobuf2 queue and queued buffers list */
 114         struct vb2_queue vb_queue;
 115         struct list_head queued_bufs;
 116         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 117         unsigned sequence;           /* buffer sequence counter */
 118
 119         /* Note if taking both locks v4l2_lock must always be locked first! */
 120         struct mutex v4l2_lock;      /* Protects everything else */
 121         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 122
 123         /* Pointer to our usb_device, will be NULL after unplug */
 124         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 125
 126         unsigned int vb_full; /* vb is full and packets dropped */
 127
 128         struct urb     *urb_list[MAX_BULK_BUFS];
 129         int            buf_num;
 130         unsigned long  buf_size;
 131         u8             *buf_list[MAX_BULK_BUFS];
 132         dma_addr_t     dma_addr[MAX_BULK_BUFS];
 133         int urbs_initialized;
 134         int urbs_submitted;
 135
 136         unsigned int f_adc, f_tuner;
 137         u32 pixelformat;
 138         u32 buffersize;
 139         unsigned int num_formats;
 140
 141         /* Controls */
 142         struct v4l2_ctrl_handler hdl;
 143         struct v4l2_ctrl *bandwidth_auto;
 144         struct v4l2_ctrl *bandwidth;
 145
 146         /* for sample rate calc */
 147         unsigned int sample;
 148         unsigned int sample_measured;
 149         unsigned long jiffies_next;
 150 };
 151
 152 /* Private functions */
 153 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 154                 struct rtl2832_sdr_dev *dev)
 155 {
 156         unsigned long flags;
 157         struct rtl2832_sdr_frame_buf *buf = NULL;
 158
 159         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 160         if (list_empty(&dev->queued_bufs))
 161                 goto leave;
 162
 163         buf = list_entry(dev->queued_bufs.next,
 164                         struct rtl2832_sdr_frame_buf, list);
 165         list_del(&buf->list);
 166 leave:
 167         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 168         return buf;
 169 }
 170
 171 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 172                 void *dst, const u8 *src, unsigned int src_len)
 173 {
 174         struct platform_device *pdev = dev->pdev;
 175         unsigned int dst_len;
 176
 177         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 178                 /* native stream, no need to convert */
 179                 memcpy(dst, src, src_len);
 180                 dst_len = src_len;
 181         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 182                 /* convert u8 to u16 */
 183                 unsigned int i;
 184                 u16 *u16dst = dst;
 185
 186                 for (i = 0; i < src_len; i++)
 187                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
 188                 dst_len = 2 * src_len;
 189         } else {
 190                 dst_len = 0;
 191         }
 192
 193         /* calculate sample rate and output it in 10 seconds intervals */
 194         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 195                 #define MSECS 10000UL
 196                 unsigned int msecs = jiffies_to_msecs(jiffies -
 197                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 198                 unsigned int samples = dev->sample - dev->sample_measured;
 199
 200                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 201                 dev->sample_measured = dev->sample;
 202                 dev_dbg(&pdev->dev,
 203                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
 204                         src_len, samples, msecs, samples * 1000UL / msecs);
 205         }
 206
 207         /* total number of I+Q pairs */
 208         dev->sample += src_len / 2;
 209
 210         return dst_len;
 211 }
 212
 213 /*
 214  * This gets called for the bulk stream pipe. This is done in interrupt
 215  * time, so it has to be fast, not crash, and not stall. Neat.
 216  */
 217 static void rtl2832_sdr_urb_complete(struct urb *urb)
 218 {
 219         struct rtl2832_sdr_dev *dev = urb->context;
 220         struct platform_device *pdev = dev->pdev;
 221         struct rtl2832_sdr_frame_buf *fbuf;
 222
 223         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 224                             urb->status, urb->actual_length,
 225                             urb->transfer_buffer_length, urb->error_count);
 226
 227         switch (urb->status) {
 228         case 0:             /* success */
 229         case -ETIMEDOUT:    /* NAK */
 230                 break;
 231         case -ECONNRESET:   /* kill */
 232         case -ENOENT:
 233         case -ESHUTDOWN:
 234                 return;
 235         default:            /* error */
 236                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 237                 break;
 238         }
 239
 240         if (likely(urb->actual_length > 0)) {
 241                 void *ptr;
 242                 unsigned int len;
 243                 /* get free framebuffer */
 244                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 245                 if (unlikely(fbuf == NULL)) {
 246                         dev->vb_full++;
 247                         dev_notice_ratelimited(&pdev->dev,
 248                                                "video buffer is full, %d packets dropped\n",
 249                                                dev->vb_full);
 250                         goto skip;
 251                 }
 252
 253                 /* fill framebuffer */
 254                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 255                 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
 256                                 urb->actual_length);
 257                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
 258                 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 259                 fbuf->vb.sequence = dev->sequence++;
 260                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 261         }
 262 skip:
 263         usb_submit_urb(urb, GFP_ATOMIC);
 264 }
 265
 266 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
 267 {
 268         struct platform_device *pdev = dev->pdev;
 269         int i;
 270
 271         for (i = dev->urbs_submitted - 1; i >= 0; i--) {
 272                 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
 273                 /* stop the URB */
 274                 usb_kill_urb(dev->urb_list[i]);
 275         }
 276         dev->urbs_submitted = 0;
 277
 278         return 0;
 279 }
 280
 281 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
 282 {
 283         struct platform_device *pdev = dev->pdev;
 284         int i, ret;
 285
 286         for (i = 0; i < dev->urbs_initialized; i++) {
 287                 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
 288                 ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL);
 289                 if (ret) {
 290                         dev_err(&pdev->dev,
 291                                 "Could not submit urb no. %d - get them all back\n",
 292                                 i);
 293                         rtl2832_sdr_kill_urbs(dev);
 294                         return ret;
 295                 }
 296                 dev->urbs_submitted++;
 297         }
 298
 299         return 0;
 300 }
 301
 302 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
 303 {
 304         struct platform_device *pdev = dev->pdev;
 305
 306         if (test_bit(URB_BUF, &dev->flags)) {
 307                 while (dev->buf_num) {
 308                         dev->buf_num--;
 309                         dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
 310                         usb_free_coherent(dev->udev, dev->buf_size,
 311                                           dev->buf_list[dev->buf_num],
 312                                           dev->dma_addr[dev->buf_num]);
 313                 }
 314         }
 315         clear_bit(URB_BUF, &dev->flags);
 316
 317         return 0;
 318 }
 319
 320 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
 321 {
 322         struct platform_device *pdev = dev->pdev;
 323
 324         dev->buf_num = 0;
 325         dev->buf_size = BULK_BUFFER_SIZE;
 326
 327         dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
 328                 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
 329
 330         for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
 331                 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
 332                                 BULK_BUFFER_SIZE, GFP_KERNEL,
 333                                 &dev->dma_addr[dev->buf_num]);
 334                 if (!dev->buf_list[dev->buf_num]) {
 335                         dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
 336                                 dev->buf_num);
 337                         rtl2832_sdr_free_stream_bufs(dev);
 338                         return -ENOMEM;
 339                 }
 340
 341                 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
 342                         dev->buf_num, dev->buf_list[dev->buf_num],
 343                         (long long)dev->dma_addr[dev->buf_num]);
 344                 set_bit(URB_BUF, &dev->flags);
 345         }
 346
 347         return 0;
 348 }
 349
 350 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
 351 {
 352         struct platform_device *pdev = dev->pdev;
 353         int i;
 354
 355         rtl2832_sdr_kill_urbs(dev);
 356
 357         for (i = dev->urbs_initialized - 1; i >= 0; i--) {
 358                 if (dev->urb_list[i]) {
 359                         dev_dbg(&pdev->dev, "free urb=%d\n", i);
 360                         /* free the URBs */
 361                         usb_free_urb(dev->urb_list[i]);
 362                 }
 363         }
 364         dev->urbs_initialized = 0;
 365
 366         return 0;
 367 }
 368
 369 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
 370 {
 371         struct platform_device *pdev = dev->pdev;
 372         int i, j;
 373
 374         /* allocate the URBs */
 375         for (i = 0; i < MAX_BULK_BUFS; i++) {
 376                 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
 377                 dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);
 378                 if (!dev->urb_list[i]) {
 379                         for (j = 0; j < i; j++) {
 380                                 usb_free_urb(dev->urb_list[j]);
 381                                 dev->urb_list[j] = NULL;
 382                         }
 383                         dev->urbs_initialized = 0;
 384                         return -ENOMEM;
 385                 }
 386                 usb_fill_bulk_urb(dev->urb_list[i],
 387                                 dev->udev,
 388                                 usb_rcvbulkpipe(dev->udev, 0x81),
 389                                 dev->buf_list[i],
 390                                 BULK_BUFFER_SIZE,
 391                                 rtl2832_sdr_urb_complete, dev);
 392
 393                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 394                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 395                 dev->urbs_initialized++;
 396         }
 397
 398         return 0;
 399 }
 400
 401 /* Must be called with vb_queue_lock hold */
 402 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 403 {
 404         struct platform_device *pdev = dev->pdev;
 405         unsigned long flags;
 406
 407         dev_dbg(&pdev->dev, "\n");
 408
 409         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 410         while (!list_empty(&dev->queued_bufs)) {
 411                 struct rtl2832_sdr_frame_buf *buf;
 412
 413                 buf = list_entry(dev->queued_bufs.next,
 414                                 struct rtl2832_sdr_frame_buf, list);
 415                 list_del(&buf->list);
 416                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 417         }
 418         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 419 }
 420
 421 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 422                 struct v4l2_capability *cap)
 423 {
 424         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 425         struct platform_device *pdev = dev->pdev;
 426
 427         dev_dbg(&pdev->dev, "\n");
 428
 429         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 430         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 431         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 432         return 0;
 433 }
 434
 435 /* Videobuf2 operations */
 436 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 437                 unsigned int *nbuffers,
 438                 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
 439 {
 440         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 441         struct platform_device *pdev = dev->pdev;
 442         unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 443
 444         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 445
 446         /* Need at least 8 buffers */
 447         if (q_num_bufs + *nbuffers < 8)
 448                 *nbuffers = 8 - q_num_bufs;
 449         *nplanes = 1;
 450         sizes[0] = PAGE_ALIGN(dev->buffersize);
 451         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 452         return 0;
 453 }
 454
 455 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 456 {
 457         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 458
 459         /* Don't allow queueing new buffers after device disconnection */
 460         if (!dev->udev)
 461                 return -ENODEV;
 462
 463         return 0;
 464 }
 465
 466 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 467 {
 468         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 469         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 470         struct rtl2832_sdr_frame_buf *buf =
 471                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 472         unsigned long flags;
 473
 474         /* Check the device has not disconnected between prep and queuing */
 475         if (!dev->udev) {
 476                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 477                 return;
 478         }
 479
 480         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 481         list_add_tail(&buf->list, &dev->queued_bufs);
 482         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 483 }
 484
 485 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 486 {
 487         struct platform_device *pdev = dev->pdev;
 488         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 489         struct dvb_frontend *fe = pdata->dvb_frontend;
 490         int ret;
 491         unsigned int f_sr, f_if;
 492         u8 buf[4], u8tmp1, u8tmp2;
 493         u64 u64tmp;
 494         u32 u32tmp;
 495
 496         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 497
 498         if (!test_bit(POWER_ON, &dev->flags))
 499                 return 0;
 500
 501         if (dev->f_adc == 0)
 502                 return 0;
 503
 504         f_sr = dev->f_adc;
 505
 506         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
 507         if (ret)
 508                 goto err;
 509
 510         ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
 511         if (ret)
 512                 goto err;
 513
 514         /* get IF from tuner */
 515         if (fe->ops.tuner_ops.get_if_frequency)
 516                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 517         else
 518                 ret = -EINVAL;
 519
 520         if (ret)
 521                 goto err;
 522
 523         /* program IF */
 524         u64tmp = f_if % pdata->clk;
 525         u64tmp *= 0x400000;
 526         u64tmp = div_u64(u64tmp, pdata->clk);
 527         u64tmp = -u64tmp;
 528         u32tmp = u64tmp & 0x3fffff;
 529
 530         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 531
 532         buf[0] = (u32tmp >> 16) & 0xff;
 533         buf[1] = (u32tmp >>  8) & 0xff;
 534         buf[2] = (u32tmp >>  0) & 0xff;
 535
 536         ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
 537         if (ret)
 538                 goto err;
 539
 540         /* BB / IF mode */
 541         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 542         if (f_if) {
 543                 u8tmp1 = 0x1a; /* disable Zero-IF */
 544                 u8tmp2 = 0x8d; /* enable ADC I */
 545         } else {
 546                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 547                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 548         }
 549
 550         ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
 551         if (ret)
 552                 goto err;
 553
 554         ret = regmap_write(dev->regmap, 0x008, u8tmp2);
 555         if (ret)
 556                 goto err;
 557
 558         ret = regmap_write(dev->regmap, 0x006, 0x80);
 559         if (ret)
 560                 goto err;
 561
 562         /* program sampling rate (resampling down) */
 563         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 564         u32tmp <<= 2;
 565         buf[0] = (u32tmp >> 24) & 0xff;
 566         buf[1] = (u32tmp >> 16) & 0xff;
 567         buf[2] = (u32tmp >>  8) & 0xff;
 568         buf[3] = (u32tmp >>  0) & 0xff;
 569         ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
 570         if (ret)
 571                 goto err;
 572
 573         /* low-pass filter */
 574         ret = regmap_bulk_write(dev->regmap, 0x11c,
 575                                 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 576                                 20);
 577         if (ret)
 578                 goto err;
 579
 580         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 581         if (ret)
 582                 goto err;
 583
 584         /* mode */
 585         ret = regmap_write(dev->regmap, 0x019, 0x05);
 586         if (ret)
 587                 goto err;
 588
 589         ret = regmap_bulk_write(dev->regmap, 0x01a,
 590                                 "\x1b\x16\x0d\x06\x01\xff", 6);
 591         if (ret)
 592                 goto err;
 593
 594         /* FSM */
 595         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
 596         if (ret)
 597                 goto err;
 598
 599         /* PID filter */
 600         ret = regmap_write(dev->regmap, 0x061, 0x60);
 601         if (ret)
 602                 goto err;
 603
 604         /* used RF tuner based settings */
 605         switch (pdata->tuner) {
 606         case RTL2832_SDR_TUNER_E4000:
 607                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 608                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 609                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 610                 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
 611                 ret = regmap_write(dev->regmap, 0x104, 0xd0);
 612                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 613                 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
 614                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 615                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 616                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 617                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 618                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 619                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 620                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 621                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 622                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 623                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 624                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 625                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 626                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 627                 ret = regmap_write(dev->regmap, 0x011, 0xd4);
 628                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 629                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 630                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 631                 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
 632                 ret = regmap_write(dev->regmap, 0x1de, 0xec);
 633                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 634                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 635                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 636                 ret = regmap_write(dev->regmap, 0x00d, 0x83);
 637                 ret = regmap_write(dev->regmap, 0x010, 0x49);
 638                 ret = regmap_write(dev->regmap, 0x00d, 0x87);
 639                 ret = regmap_write(dev->regmap, 0x00d, 0x85);
 640                 ret = regmap_write(dev->regmap, 0x013, 0x02);
 641                 break;
 642         case RTL2832_SDR_TUNER_FC0012:
 643         case RTL2832_SDR_TUNER_FC0013:
 644                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 645                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 646                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 647                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 648                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 649                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 650                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 651                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 652                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 653                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 654                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 655                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 656                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 657                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 658                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 659                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 660                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 661                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 662                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 663                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 664                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
 665                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 666                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 667                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 668                 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
 669                 ret = regmap_write(dev->regmap, 0x1de, 0xef);
 670                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 671                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 672                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 673                 break;
 674         case RTL2832_SDR_TUNER_R820T:
 675         case RTL2832_SDR_TUNER_R828D:
 676                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 677                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 678                 ret = regmap_write(dev->regmap, 0x115, 0x01);
 679                 ret = regmap_write(dev->regmap, 0x103, 0x80);
 680                 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
 681                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 682                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 683                 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
 684                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 685                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 686                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 687                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 688                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 689                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 690                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 691                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 692                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 693                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 694                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 695                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 696                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 697                 ret = regmap_write(dev->regmap, 0x011, 0xf4);
 698                 break;
 699         case RTL2832_SDR_TUNER_FC2580:
 700                 ret = regmap_write(dev->regmap, 0x112, 0x39);
 701                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 702                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 703                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 704                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 705                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 706                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 707                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 708                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 709                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 710                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 711                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 712                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 713                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 714                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 715                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 716                 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
 717                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 718                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 719                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 720                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
 721                 break;
 722         default:
 723                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 724         }
 725
 726         /* software reset */
 727         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
 728         if (ret)
 729                 goto err;
 730
 731         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
 732         if (ret)
 733                 goto err;
 734 err:
 735         return ret;
 736 };
 737
 738 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 739 {
 740         struct platform_device *pdev = dev->pdev;
 741         int ret;
 742
 743         dev_dbg(&pdev->dev, "\n");
 744
 745         /* PID filter */
 746         ret = regmap_write(dev->regmap, 0x061, 0xe0);
 747         if (ret)
 748                 goto err;
 749
 750         /* mode */
 751         ret = regmap_write(dev->regmap, 0x019, 0x20);
 752         if (ret)
 753                 goto err;
 754
 755         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 756         if (ret)
 757                 goto err;
 758
 759         /* FSM */
 760         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
 761         if (ret)
 762                 goto err;
 763
 764         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
 765         if (ret)
 766                 goto err;
 767
 768         ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
 769         if (ret)
 770                 goto err;
 771 err:
 772         return;
 773 };
 774
 775 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 776 {
 777         struct platform_device *pdev = dev->pdev;
 778         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 779         struct dvb_frontend *fe = pdata->dvb_frontend;
 780         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 781         struct v4l2_ctrl *bandwidth_auto;
 782         struct v4l2_ctrl *bandwidth;
 783
 784         /*
 785          * tuner RF (Hz)
 786          */
 787         if (dev->f_tuner == 0)
 788                 return 0;
 789
 790         /*
 791          * bandwidth (Hz)
 792          */
 793         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 794                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 795         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 796         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 797                 c->bandwidth_hz = dev->f_adc;
 798                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 799         } else {
 800                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 801         }
 802
 803         c->frequency = dev->f_tuner;
 804         c->delivery_system = SYS_DVBT;
 805
 806         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 807                 c->frequency, c->bandwidth_hz);
 808
 809         if (!test_bit(POWER_ON, &dev->flags))
 810                 return 0;
 811
 812         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 813                 if (fe->ops.tuner_ops.set_params)
 814                         fe->ops.tuner_ops.set_params(fe);
 815         }
 816
 817         return 0;
 818 };
 819
 820 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 821 {
 822         struct platform_device *pdev = dev->pdev;
 823         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 824         struct dvb_frontend *fe = pdata->dvb_frontend;
 825
 826         dev_dbg(&pdev->dev, "\n");
 827
 828         if (fe->ops.tuner_ops.init)
 829                 fe->ops.tuner_ops.init(fe);
 830
 831         return 0;
 832 };
 833
 834 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 835 {
 836         struct platform_device *pdev = dev->pdev;
 837         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 838         struct dvb_frontend *fe = pdata->dvb_frontend;
 839
 840         dev_dbg(&pdev->dev, "\n");
 841
 842         if (fe->ops.tuner_ops.sleep)
 843                 fe->ops.tuner_ops.sleep(fe);
 844
 845         return;
 846 };
 847
 848 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 849 {
 850         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 851         struct platform_device *pdev = dev->pdev;
 852         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 853         struct dvb_usb_device *d = pdata->dvb_usb_device;
 854         int ret;
 855
 856         dev_dbg(&pdev->dev, "\n");
 857
 858         if (!dev->udev)
 859                 return -ENODEV;
 860
 861         if (mutex_lock_interruptible(&dev->v4l2_lock))
 862                 return -ERESTARTSYS;
 863
 864         if (d->props->power_ctrl)
 865                 d->props->power_ctrl(d, 1);
 866
 867         /* enable ADC */
 868         if (d->props->frontend_ctrl)
 869                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 870
 871         set_bit(POWER_ON, &dev->flags);
 872
 873         /* wake-up tuner */
 874         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 875                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 876         else
 877                 ret = rtl2832_sdr_set_tuner(dev);
 878         if (ret)
 879                 goto err;
 880
 881         ret = rtl2832_sdr_set_tuner_freq(dev);
 882         if (ret)
 883                 goto err;
 884
 885         ret = rtl2832_sdr_set_adc(dev);
 886         if (ret)
 887                 goto err;
 888
 889         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 890         if (ret)
 891                 goto err;
 892
 893         ret = rtl2832_sdr_alloc_urbs(dev);
 894         if (ret)
 895                 goto err;
 896
 897         dev->sequence = 0;
 898
 899         ret = rtl2832_sdr_submit_urbs(dev);
 900         if (ret)
 901                 goto err;
 902
 903 err:
 904         mutex_unlock(&dev->v4l2_lock);
 905
 906         return ret;
 907 }
 908
 909 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 910 {
 911         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 912         struct platform_device *pdev = dev->pdev;
 913         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 914         struct dvb_usb_device *d = pdata->dvb_usb_device;
 915
 916         dev_dbg(&pdev->dev, "\n");
 917
 918         mutex_lock(&dev->v4l2_lock);
 919
 920         rtl2832_sdr_kill_urbs(dev);
 921         rtl2832_sdr_free_urbs(dev);
 922         rtl2832_sdr_free_stream_bufs(dev);
 923         rtl2832_sdr_cleanup_queued_bufs(dev);
 924         rtl2832_sdr_unset_adc(dev);
 925
 926         /* sleep tuner */
 927         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 928                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 929         else
 930                 rtl2832_sdr_unset_tuner(dev);
 931
 932         clear_bit(POWER_ON, &dev->flags);
 933
 934         /* disable ADC */
 935         if (d->props->frontend_ctrl)
 936                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 937
 938         if (d->props->power_ctrl)
 939                 d->props->power_ctrl(d, 0);
 940
 941         mutex_unlock(&dev->v4l2_lock);
 942 }
 943
 944 static const struct vb2_ops rtl2832_sdr_vb2_ops = {
 945         .queue_setup            = rtl2832_sdr_queue_setup,
 946         .buf_prepare            = rtl2832_sdr_buf_prepare,
 947         .buf_queue              = rtl2832_sdr_buf_queue,
 948         .start_streaming        = rtl2832_sdr_start_streaming,
 949         .stop_streaming         = rtl2832_sdr_stop_streaming,
 950 };
 951
 952 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
 953                 struct v4l2_tuner *v)
 954 {
 955         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 956         struct platform_device *pdev = dev->pdev;
 957         int ret;
 958
 959         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
 960
 961         if (v->index == 0) {
 962                 strscpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
 963                 v->type = V4L2_TUNER_ADC;
 964                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 965                 v->rangelow =   300000;
 966                 v->rangehigh = 3200000;
 967                 ret = 0;
 968         } else if (v->index == 1 &&
 969                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
 970                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
 971         } else if (v->index == 1) {
 972                 strscpy(v->name, "RF: <unknown>", sizeof(v->name));
 973                 v->type = V4L2_TUNER_RF;
 974                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 975                 v->rangelow =    50000000;
 976                 v->rangehigh = 2000000000;
 977                 ret = 0;
 978         } else {
 979                 ret = -EINVAL;
 980         }
 981         return ret;
 982 }
 983
 984 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
 985                 const struct v4l2_tuner *v)
 986 {
 987         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 988         struct platform_device *pdev = dev->pdev;
 989         int ret;
 990
 991         dev_dbg(&pdev->dev, "\n");
 992
 993         if (v->index == 0) {
 994                 ret = 0;
 995         } else if (v->index == 1 &&
 996                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
 997                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 998         } else if (v->index == 1) {
 999                 ret = 0;
1000         } else {
1001                 ret = -EINVAL;
1002         }
1003         return ret;
1004 }
1005
1006 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1007                 struct v4l2_frequency_band *band)
1008 {
1009         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1010         struct platform_device *pdev = dev->pdev;
1011         int ret;
1012
1013         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1014                 band->tuner, band->type, band->index);
1015
1016         if (band->tuner == 0) {
1017                 if (band->index >= ARRAY_SIZE(bands_adc))
1018                         return -EINVAL;
1019
1020                 *band = bands_adc[band->index];
1021                 ret = 0;
1022         } else if (band->tuner == 1 &&
1023                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1024                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1025         } else if (band->tuner == 1) {
1026                 if (band->index >= ARRAY_SIZE(bands_fm))
1027                         return -EINVAL;
1028
1029                 *band = bands_fm[band->index];
1030                 ret = 0;
1031         } else {
1032                 ret = -EINVAL;
1033         }
1034         return ret;
1035 }
1036
1037 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1038                 struct v4l2_frequency *f)
1039 {
1040         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1041         struct platform_device *pdev = dev->pdev;
1042         int ret;
1043
1044         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1045
1046         if (f->tuner == 0) {
1047                 f->frequency = dev->f_adc;
1048                 f->type = V4L2_TUNER_ADC;
1049                 ret = 0;
1050         } else if (f->tuner == 1 &&
1051                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1052                 f->type = V4L2_TUNER_RF;
1053                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1054         } else if (f->tuner == 1) {
1055                 f->frequency = dev->f_tuner;
1056                 f->type = V4L2_TUNER_RF;
1057                 ret = 0;
1058         } else {
1059                 ret = -EINVAL;
1060         }
1061         return ret;
1062 }
1063
1064 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1065                 const struct v4l2_frequency *f)
1066 {
1067         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1068         struct platform_device *pdev = dev->pdev;
1069         int ret, band;
1070
1071         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1072                 f->tuner, f->type, f->frequency);
1073
1074         /* ADC band midpoints */
1075         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1076         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1077
1078         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1079                 if (f->frequency < BAND_ADC_0)
1080                         band = 0;
1081                 else if (f->frequency < BAND_ADC_1)
1082                         band = 1;
1083                 else
1084                         band = 2;
1085
1086                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1087                                      bands_adc[band].rangelow,
1088                                      bands_adc[band].rangehigh);
1089
1090                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1091                 ret = rtl2832_sdr_set_adc(dev);
1092         } else if (f->tuner == 1 &&
1093                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1094                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1095         } else if (f->tuner == 1) {
1096                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1097                                 bands_fm[0].rangelow,
1098                                 bands_fm[0].rangehigh);
1099                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1100
1101                 ret = rtl2832_sdr_set_tuner_freq(dev);
1102         } else {
1103                 ret = -EINVAL;
1104         }
1105         return ret;
1106 }
1107
1108 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1109                 struct v4l2_fmtdesc *f)
1110 {
1111         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1112         struct platform_device *pdev = dev->pdev;
1113
1114         dev_dbg(&pdev->dev, "\n");
1115
1116         if (f->index >= dev->num_formats)
1117                 return -EINVAL;
1118
1119         f->pixelformat = formats[f->index].pixelformat;
1120
1121         return 0;
1122 }
1123
1124 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1125                 struct v4l2_format *f)
1126 {
1127         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1128         struct platform_device *pdev = dev->pdev;
1129
1130         dev_dbg(&pdev->dev, "\n");
1131
1132         f->fmt.sdr.pixelformat = dev->pixelformat;
1133         f->fmt.sdr.buffersize = dev->buffersize;
1134
1135         return 0;
1136 }
1137
1138 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1139                 struct v4l2_format *f)
1140 {
1141         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1142         struct platform_device *pdev = dev->pdev;
1143         struct vb2_queue *q = &dev->vb_queue;
1144         int i;
1145
1146         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1147                 (char *)&f->fmt.sdr.pixelformat);
1148
1149         if (vb2_is_busy(q))
1150                 return -EBUSY;
1151
1152         for (i = 0; i < dev->num_formats; i++) {
1153                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1154                         dev->pixelformat = formats[i].pixelformat;
1155                         dev->buffersize = formats[i].buffersize;
1156                         f->fmt.sdr.buffersize = formats[i].buffersize;
1157                         return 0;
1158                 }
1159         }
1160
1161         dev->pixelformat = formats[0].pixelformat;
1162         dev->buffersize = formats[0].buffersize;
1163         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1164         f->fmt.sdr.buffersize = formats[0].buffersize;
1165
1166         return 0;
1167 }
1168
1169 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1170                 struct v4l2_format *f)
1171 {
1172         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1173         struct platform_device *pdev = dev->pdev;
1174         int i;
1175
1176         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1177                 (char *)&f->fmt.sdr.pixelformat);
1178
1179         for (i = 0; i < dev->num_formats; i++) {
1180                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1181                         f->fmt.sdr.buffersize = formats[i].buffersize;
1182                         return 0;
1183                 }
1184         }
1185
1186         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1187         f->fmt.sdr.buffersize = formats[0].buffersize;
1188
1189         return 0;
1190 }
1191
1192 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1193         .vidioc_querycap          = rtl2832_sdr_querycap,
1194
1195         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1196         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1197         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1198         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1199
1200         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1201         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1202         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1203         .vidioc_querybuf          = vb2_ioctl_querybuf,
1204         .vidioc_qbuf              = vb2_ioctl_qbuf,
1205         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1206
1207         .vidioc_streamon          = vb2_ioctl_streamon,
1208         .vidioc_streamoff         = vb2_ioctl_streamoff,
1209
1210         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1211         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1212
1213         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1214         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1215         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1216
1217         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1218         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1219         .vidioc_log_status        = v4l2_ctrl_log_status,
1220 };
1221
1222 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1223         .owner                    = THIS_MODULE,
1224         .open                     = v4l2_fh_open,
1225         .release                  = vb2_fop_release,
1226         .read                     = vb2_fop_read,
1227         .poll                     = vb2_fop_poll,
1228         .mmap                     = vb2_fop_mmap,
1229         .unlocked_ioctl           = video_ioctl2,
1230 };
1231
1232 static struct video_device rtl2832_sdr_template = {
1233         .name                     = "Realtek RTL2832 SDR",
1234         .release                  = video_device_release_empty,
1235         .fops                     = &rtl2832_sdr_fops,
1236         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1237         .device_caps              = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1238                                     V4L2_CAP_READWRITE | V4L2_CAP_TUNER,
1239 };
1240
1241 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1242 {
1243         struct rtl2832_sdr_dev *dev =
1244                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1245                                         hdl);
1246         struct platform_device *pdev = dev->pdev;
1247         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1248         struct dvb_frontend *fe = pdata->dvb_frontend;
1249         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1250         int ret;
1251
1252         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1253                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1254                 ctrl->step);
1255
1256         switch (ctrl->id) {
1257         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1258         case V4L2_CID_RF_TUNER_BANDWIDTH:
1259                 /* TODO: these controls should be moved to tuner drivers */
1260                 if (dev->bandwidth_auto->val) {
1261                         /* Round towards the closest legal value */
1262                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1263                         u32 offset;
1264
1265                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1266                                       dev->bandwidth->maximum);
1267                         offset = val - dev->bandwidth->minimum;
1268                         offset = dev->bandwidth->step *
1269                                 div_u64(offset, dev->bandwidth->step);
1270                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1271                 }
1272                 c->bandwidth_hz = dev->bandwidth->val;
1273
1274                 if (!test_bit(POWER_ON, &dev->flags))
1275                         return 0;
1276
1277                 if (fe->ops.tuner_ops.set_params)
1278                         ret = fe->ops.tuner_ops.set_params(fe);
1279                 else
1280                         ret = 0;
1281                 break;
1282         default:
1283                 ret = -EINVAL;
1284         }
1285
1286         return ret;
1287 }
1288
1289 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1290         .s_ctrl = rtl2832_sdr_s_ctrl,
1291 };
1292
1293 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1294 {
1295         struct rtl2832_sdr_dev *dev =
1296                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1297         struct platform_device *pdev = dev->pdev;
1298
1299         dev_dbg(&pdev->dev, "\n");
1300
1301         v4l2_ctrl_handler_free(&dev->hdl);
1302         v4l2_device_unregister(&dev->v4l2_dev);
1303         kfree(dev);
1304 }
1305
1306 /* Platform driver interface */
1307 static int rtl2832_sdr_probe(struct platform_device *pdev)
1308 {
1309         struct rtl2832_sdr_dev *dev;
1310         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1311         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1312         struct v4l2_subdev *subdev;
1313         int ret;
1314
1315         dev_dbg(&pdev->dev, "\n");
1316
1317         if (!pdata) {
1318                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1319                 ret = -EINVAL;
1320                 goto err;
1321         }
1322         if (!pdev->dev.parent->driver) {
1323                 dev_dbg(&pdev->dev, "No parent device\n");
1324                 ret = -EINVAL;
1325                 goto err;
1326         }
1327         /* try to refcount host drv since we are the consumer */
1328         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1329                 dev_err(&pdev->dev, "Refcount fail");
1330                 ret = -EINVAL;
1331                 goto err;
1332         }
1333         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1334         if (dev == NULL) {
1335                 ret = -ENOMEM;
1336                 goto err_module_put;
1337         }
1338
1339         /* setup the state */
1340         subdev = pdata->v4l2_subdev;
1341         dev->v4l2_subdev = pdata->v4l2_subdev;
1342         dev->pdev = pdev;
1343         dev->regmap = pdata->regmap;
1344         dev->udev = pdata->dvb_usb_device->udev;
1345         dev->f_adc = bands_adc[0].rangelow;
1346         dev->f_tuner = bands_fm[0].rangelow;
1347         dev->pixelformat = formats[0].pixelformat;
1348         dev->buffersize = formats[0].buffersize;
1349         dev->num_formats = NUM_FORMATS;
1350         if (!rtl2832_sdr_emulated_fmt)
1351                 dev->num_formats -= 1;
1352
1353         mutex_init(&dev->v4l2_lock);
1354         mutex_init(&dev->vb_queue_lock);
1355         spin_lock_init(&dev->queued_bufs_lock);
1356         INIT_LIST_HEAD(&dev->queued_bufs);
1357
1358         /* Init videobuf2 queue structure */
1359         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1360         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1361         dev->vb_queue.drv_priv = dev;
1362         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1363         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1364         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1365         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1366         ret = vb2_queue_init(&dev->vb_queue);
1367         if (ret) {
1368                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1369                 goto err_kfree;
1370         }
1371
1372         /* Register controls */
1373         switch (pdata->tuner) {
1374         case RTL2832_SDR_TUNER_E4000:
1375                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1376                 if (subdev)
1377                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1378                                               NULL, true);
1379                 break;
1380         case RTL2832_SDR_TUNER_R820T:
1381         case RTL2832_SDR_TUNER_R828D:
1382                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1383                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1384                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1385                                                         0, 1, 1, 1);
1386                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1387                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1388                                                    0, 8000000, 100000, 0);
1389                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1390                 break;
1391         case RTL2832_SDR_TUNER_FC0012:
1392         case RTL2832_SDR_TUNER_FC0013:
1393                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1394                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1395                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1396                                                         0, 1, 1, 1);
1397                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1398                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1399                                                    6000000, 8000000, 1000000,
1400                                                    6000000);
1401                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1402                 break;
1403         case RTL2832_SDR_TUNER_FC2580:
1404                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1405                 if (subdev)
1406                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1407                                               NULL, true);
1408                 break;
1409         default:
1410                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1411                 dev_err(&pdev->dev, "Unsupported tuner\n");
1412                 ret = -ENODEV;
1413                 goto err_v4l2_ctrl_handler_free;
1414         }
1415         if (dev->hdl.error) {
1416                 ret = dev->hdl.error;
1417                 dev_err(&pdev->dev, "Could not initialize controls\n");
1418                 goto err_v4l2_ctrl_handler_free;
1419         }
1420
1421         /* Init video_device structure */
1422         dev->vdev = rtl2832_sdr_template;
1423         dev->vdev.queue = &dev->vb_queue;
1424         dev->vdev.queue->lock = &dev->vb_queue_lock;
1425         video_set_drvdata(&dev->vdev, dev);
1426
1427         /* Register the v4l2_device structure */
1428         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1429         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1430         if (ret) {
1431                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1432                 goto err_v4l2_ctrl_handler_free;
1433         }
1434
1435         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1436         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1437         dev->vdev.lock = &dev->v4l2_lock;
1438         dev->vdev.vfl_dir = VFL_DIR_RX;
1439
1440         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1441         if (ret) {
1442                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1443                         ret);
1444                 goto err_v4l2_device_unregister;
1445         }
1446         dev_info(&pdev->dev, "Registered as %s\n",
1447                  video_device_node_name(&dev->vdev));
1448         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1449         dev_notice(&pdev->dev,
1450                    "SDR API is still slightly experimental and functionality changes may follow\n");
1451         platform_set_drvdata(pdev, dev);
1452         return 0;
1453 err_v4l2_device_unregister:
1454         v4l2_device_unregister(&dev->v4l2_dev);
1455 err_v4l2_ctrl_handler_free:
1456         v4l2_ctrl_handler_free(&dev->hdl);
1457 err_kfree:
1458         kfree(dev);
1459 err_module_put:
1460         module_put(pdev->dev.parent->driver->owner);
1461 err:
1462         return ret;
1463 }
1464
1465 static void rtl2832_sdr_remove(struct platform_device *pdev)
1466 {
1467         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1468
1469         dev_dbg(&pdev->dev, "\n");
1470
1471         mutex_lock(&dev->vb_queue_lock);
1472         mutex_lock(&dev->v4l2_lock);
1473         /* No need to keep the urbs around after disconnection */
1474         dev->udev = NULL;
1475         v4l2_device_disconnect(&dev->v4l2_dev);
1476         video_unregister_device(&dev->vdev);
1477         mutex_unlock(&dev->v4l2_lock);
1478         mutex_unlock(&dev->vb_queue_lock);
1479         v4l2_device_put(&dev->v4l2_dev);
1480         module_put(pdev->dev.parent->driver->owner);
1481 }
1482
1483 static struct platform_driver rtl2832_sdr_driver = {
1484         .driver = {
1485                 .name   = "rtl2832_sdr",
1486         },
1487         .probe          = rtl2832_sdr_probe,
1488         .remove         = rtl2832_sdr_remove,
1489 };
1490 module_platform_driver(rtl2832_sdr_driver);
1491
1492 MODULE_AUTHOR("Antti Palosaari <[email protected]>");
1493 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1494 MODULE_LICENSE("GPL");