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 <crope@iki.fi>
   6  *
   7  * GNU Radio plugin "gr-kernel" for device usage will be on:
   8  * http://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                 .name           = "Complex U8",
  85                 .pixelformat    = V4L2_SDR_FMT_CU8,
  86                 .buffersize     = BULK_BUFFER_SIZE,
  87         }, {
  88                 .name           = "Complex U16LE (emulated)",
  89                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
  90                 .buffersize     = BULK_BUFFER_SIZE * 2,
  91         },
  92 };
  93
  94 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  95
  96 /* intermediate buffers with raw data from the USB device */
  97 struct rtl2832_sdr_frame_buf {
  98         /* common v4l buffer stuff -- must be first */
  99         struct vb2_v4l2_buffer vb;
 100         struct list_head list;
 101 };
 102
 103 struct rtl2832_sdr_dev {
 104 #define POWER_ON           0  /* BIT(0) */
 105 #define URB_BUF            1  /* BIT(1) */
 106         unsigned long flags;
 107
 108         struct platform_device *pdev;
 109         struct regmap *regmap;
 110
 111         struct video_device vdev;
 112         struct v4l2_device v4l2_dev;
 113         struct v4l2_subdev *v4l2_subdev;
 114
 115         /* videobuf2 queue and queued buffers list */
 116         struct vb2_queue vb_queue;
 117         struct list_head queued_bufs;
 118         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 119         unsigned sequence;           /* buffer sequence counter */
 120
 121         /* Note if taking both locks v4l2_lock must always be locked first! */
 122         struct mutex v4l2_lock;      /* Protects everything else */
 123         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 124
 125         /* Pointer to our usb_device, will be NULL after unplug */
 126         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 127
 128         unsigned int vb_full; /* vb is full and packets dropped */
 129
 130         struct urb     *urb_list[MAX_BULK_BUFS];
 131         int            buf_num;
 132         unsigned long  buf_size;
 133         u8             *buf_list[MAX_BULK_BUFS];
 134         dma_addr_t     dma_addr[MAX_BULK_BUFS];
 135         int urbs_initialized;
 136         int urbs_submitted;
 137
 138         unsigned int f_adc, f_tuner;
 139         u32 pixelformat;
 140         u32 buffersize;
 141         unsigned int num_formats;
 142
 143         /* Controls */
 144         struct v4l2_ctrl_handler hdl;
 145         struct v4l2_ctrl *bandwidth_auto;
 146         struct v4l2_ctrl *bandwidth;
 147
 148         /* for sample rate calc */
 149         unsigned int sample;
 150         unsigned int sample_measured;
 151         unsigned long jiffies_next;
 152 };
 153
 154 /* Private functions */
 155 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 156                 struct rtl2832_sdr_dev *dev)
 157 {
 158         unsigned long flags;
 159         struct rtl2832_sdr_frame_buf *buf = NULL;
 160
 161         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 162         if (list_empty(&dev->queued_bufs))
 163                 goto leave;
 164
 165         buf = list_entry(dev->queued_bufs.next,
 166                         struct rtl2832_sdr_frame_buf, list);
 167         list_del(&buf->list);
 168 leave:
 169         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 170         return buf;
 171 }
 172
 173 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 174                 void *dst, const u8 *src, unsigned int src_len)
 175 {
 176         struct platform_device *pdev = dev->pdev;
 177         unsigned int dst_len;
 178
 179         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 180                 /* native stream, no need to convert */
 181                 memcpy(dst, src, src_len);
 182                 dst_len = src_len;
 183         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 184                 /* convert u8 to u16 */
 185                 unsigned int i;
 186                 u16 *u16dst = dst;
 187
 188                 for (i = 0; i < src_len; i++)
 189                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
 190                 dst_len = 2 * src_len;
 191         } else {
 192                 dst_len = 0;
 193         }
 194
 195         /* calculate sample rate and output it in 10 seconds intervals */
 196         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 197                 #define MSECS 10000UL
 198                 unsigned int msecs = jiffies_to_msecs(jiffies -
 199                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 200                 unsigned int samples = dev->sample - dev->sample_measured;
 201
 202                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 203                 dev->sample_measured = dev->sample;
 204                 dev_dbg(&pdev->dev,
 205                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
 206                         src_len, samples, msecs, samples * 1000UL / msecs);
 207         }
 208
 209         /* total number of I+Q pairs */
 210         dev->sample += src_len / 2;
 211
 212         return dst_len;
 213 }
 214
 215 /*
 216  * This gets called for the bulk stream pipe. This is done in interrupt
 217  * time, so it has to be fast, not crash, and not stall. Neat.
 218  */
 219 static void rtl2832_sdr_urb_complete(struct urb *urb)
 220 {
 221         struct rtl2832_sdr_dev *dev = urb->context;
 222         struct platform_device *pdev = dev->pdev;
 223         struct rtl2832_sdr_frame_buf *fbuf;
 224
 225         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 226                             urb->status, urb->actual_length,
 227                             urb->transfer_buffer_length, urb->error_count);
 228
 229         switch (urb->status) {
 230         case 0:             /* success */
 231         case -ETIMEDOUT:    /* NAK */
 232                 break;
 233         case -ECONNRESET:   /* kill */
 234         case -ENOENT:
 235         case -ESHUTDOWN:
 236                 return;
 237         default:            /* error */
 238                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 239                 break;
 240         }
 241
 242         if (likely(urb->actual_length > 0)) {
 243                 void *ptr;
 244                 unsigned int len;
 245                 /* get free framebuffer */
 246                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 247                 if (unlikely(fbuf == NULL)) {
 248                         dev->vb_full++;
 249                         dev_notice_ratelimited(&pdev->dev,
 250                                                "videobuf is full, %d packets dropped\n",
 251                                                dev->vb_full);
 252                         goto skip;
 253                 }
 254
 255                 /* fill framebuffer */
 256                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 257                 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
 258                                 urb->actual_length);
 259                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
 260                 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 261                 fbuf->vb.sequence = dev->sequence++;
 262                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 263         }
 264 skip:
 265         usb_submit_urb(urb, GFP_ATOMIC);
 266 }
 267
 268 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
 269 {
 270         struct platform_device *pdev = dev->pdev;
 271         int i;
 272
 273         for (i = dev->urbs_submitted - 1; i >= 0; i--) {
 274                 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
 275                 /* stop the URB */
 276                 usb_kill_urb(dev->urb_list[i]);
 277         }
 278         dev->urbs_submitted = 0;
 279
 280         return 0;
 281 }
 282
 283 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
 284 {
 285         struct platform_device *pdev = dev->pdev;
 286         int i, ret;
 287
 288         for (i = 0; i < dev->urbs_initialized; i++) {
 289                 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
 290                 ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL);
 291                 if (ret) {
 292                         dev_err(&pdev->dev,
 293                                 "Could not submit urb no. %d - get them all back\n",
 294                                 i);
 295                         rtl2832_sdr_kill_urbs(dev);
 296                         return ret;
 297                 }
 298                 dev->urbs_submitted++;
 299         }
 300
 301         return 0;
 302 }
 303
 304 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
 305 {
 306         struct platform_device *pdev = dev->pdev;
 307
 308         if (test_bit(URB_BUF, &dev->flags)) {
 309                 while (dev->buf_num) {
 310                         dev->buf_num--;
 311                         dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
 312                         usb_free_coherent(dev->udev, dev->buf_size,
 313                                           dev->buf_list[dev->buf_num],
 314                                           dev->dma_addr[dev->buf_num]);
 315                 }
 316         }
 317         clear_bit(URB_BUF, &dev->flags);
 318
 319         return 0;
 320 }
 321
 322 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
 323 {
 324         struct platform_device *pdev = dev->pdev;
 325
 326         dev->buf_num = 0;
 327         dev->buf_size = BULK_BUFFER_SIZE;
 328
 329         dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
 330                 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
 331
 332         for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
 333                 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
 334                                 BULK_BUFFER_SIZE, GFP_KERNEL,
 335                                 &dev->dma_addr[dev->buf_num]);
 336                 if (!dev->buf_list[dev->buf_num]) {
 337                         dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
 338                                 dev->buf_num);
 339                         rtl2832_sdr_free_stream_bufs(dev);
 340                         return -ENOMEM;
 341                 }
 342
 343                 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
 344                         dev->buf_num, dev->buf_list[dev->buf_num],
 345                         (long long)dev->dma_addr[dev->buf_num]);
 346                 set_bit(URB_BUF, &dev->flags);
 347         }
 348
 349         return 0;
 350 }
 351
 352 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
 353 {
 354         struct platform_device *pdev = dev->pdev;
 355         int i;
 356
 357         rtl2832_sdr_kill_urbs(dev);
 358
 359         for (i = dev->urbs_initialized - 1; i >= 0; i--) {
 360                 if (dev->urb_list[i]) {
 361                         dev_dbg(&pdev->dev, "free urb=%d\n", i);
 362                         /* free the URBs */
 363                         usb_free_urb(dev->urb_list[i]);
 364                 }
 365         }
 366         dev->urbs_initialized = 0;
 367
 368         return 0;
 369 }
 370
 371 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
 372 {
 373         struct platform_device *pdev = dev->pdev;
 374         int i, j;
 375
 376         /* allocate the URBs */
 377         for (i = 0; i < MAX_BULK_BUFS; i++) {
 378                 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
 379                 dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);
 380                 if (!dev->urb_list[i]) {
 381                         for (j = 0; j < i; j++)
 382                                 usb_free_urb(dev->urb_list[j]);
 383                         return -ENOMEM;
 384                 }
 385                 usb_fill_bulk_urb(dev->urb_list[i],
 386                                 dev->udev,
 387                                 usb_rcvbulkpipe(dev->udev, 0x81),
 388                                 dev->buf_list[i],
 389                                 BULK_BUFFER_SIZE,
 390                                 rtl2832_sdr_urb_complete, dev);
 391
 392                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 393                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 394                 dev->urbs_initialized++;
 395         }
 396
 397         return 0;
 398 }
 399
 400 /* Must be called with vb_queue_lock hold */
 401 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 402 {
 403         struct platform_device *pdev = dev->pdev;
 404         unsigned long flags;
 405
 406         dev_dbg(&pdev->dev, "\n");
 407
 408         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 409         while (!list_empty(&dev->queued_bufs)) {
 410                 struct rtl2832_sdr_frame_buf *buf;
 411
 412                 buf = list_entry(dev->queued_bufs.next,
 413                                 struct rtl2832_sdr_frame_buf, list);
 414                 list_del(&buf->list);
 415                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 416         }
 417         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 418 }
 419
 420 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 421                 struct v4l2_capability *cap)
 422 {
 423         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 424         struct platform_device *pdev = dev->pdev;
 425
 426         dev_dbg(&pdev->dev, "\n");
 427
 428         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 429         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 430         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 431         return 0;
 432 }
 433
 434 /* Videobuf2 operations */
 435 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 436                 unsigned int *nbuffers,
 437                 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
 438 {
 439         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 440         struct platform_device *pdev = dev->pdev;
 441
 442         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 443
 444         /* Need at least 8 buffers */
 445         if (vq->num_buffers + *nbuffers < 8)
 446                 *nbuffers = 8 - vq->num_buffers;
 447         *nplanes = 1;
 448         sizes[0] = PAGE_ALIGN(dev->buffersize);
 449         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 450         return 0;
 451 }
 452
 453 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 454 {
 455         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 456
 457         /* Don't allow queueing new buffers after device disconnection */
 458         if (!dev->udev)
 459                 return -ENODEV;
 460
 461         return 0;
 462 }
 463
 464 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 465 {
 466         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 467         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 468         struct rtl2832_sdr_frame_buf *buf =
 469                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 470         unsigned long flags;
 471
 472         /* Check the device has not disconnected between prep and queuing */
 473         if (!dev->udev) {
 474                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 475                 return;
 476         }
 477
 478         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 479         list_add_tail(&buf->list, &dev->queued_bufs);
 480         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 481 }
 482
 483 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 484 {
 485         struct platform_device *pdev = dev->pdev;
 486         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 487         struct dvb_frontend *fe = pdata->dvb_frontend;
 488         int ret;
 489         unsigned int f_sr, f_if;
 490         u8 buf[4], u8tmp1, u8tmp2;
 491         u64 u64tmp;
 492         u32 u32tmp;
 493
 494         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 495
 496         if (!test_bit(POWER_ON, &dev->flags))
 497                 return 0;
 498
 499         if (dev->f_adc == 0)
 500                 return 0;
 501
 502         f_sr = dev->f_adc;
 503
 504         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
 505         if (ret)
 506                 goto err;
 507
 508         ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
 509         if (ret)
 510                 goto err;
 511
 512         /* get IF from tuner */
 513         if (fe->ops.tuner_ops.get_if_frequency)
 514                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 515         else
 516                 ret = -EINVAL;
 517
 518         if (ret)
 519                 goto err;
 520
 521         /* program IF */
 522         u64tmp = f_if % pdata->clk;
 523         u64tmp *= 0x400000;
 524         u64tmp = div_u64(u64tmp, pdata->clk);
 525         u64tmp = -u64tmp;
 526         u32tmp = u64tmp & 0x3fffff;
 527
 528         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 529
 530         buf[0] = (u32tmp >> 16) & 0xff;
 531         buf[1] = (u32tmp >>  8) & 0xff;
 532         buf[2] = (u32tmp >>  0) & 0xff;
 533
 534         ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
 535         if (ret)
 536                 goto err;
 537
 538         /* BB / IF mode */
 539         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 540         if (f_if) {
 541                 u8tmp1 = 0x1a; /* disable Zero-IF */
 542                 u8tmp2 = 0x8d; /* enable ADC I */
 543         } else {
 544                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 545                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 546         }
 547
 548         ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
 549         if (ret)
 550                 goto err;
 551
 552         ret = regmap_write(dev->regmap, 0x008, u8tmp2);
 553         if (ret)
 554                 goto err;
 555
 556         ret = regmap_write(dev->regmap, 0x006, 0x80);
 557         if (ret)
 558                 goto err;
 559
 560         /* program sampling rate (resampling down) */
 561         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 562         u32tmp <<= 2;
 563         buf[0] = (u32tmp >> 24) & 0xff;
 564         buf[1] = (u32tmp >> 16) & 0xff;
 565         buf[2] = (u32tmp >>  8) & 0xff;
 566         buf[3] = (u32tmp >>  0) & 0xff;
 567         ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
 568         if (ret)
 569                 goto err;
 570
 571         /* low-pass filter */
 572         ret = regmap_bulk_write(dev->regmap, 0x11c,
 573                                 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 574                                 20);
 575         if (ret)
 576                 goto err;
 577
 578         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 579         if (ret)
 580                 goto err;
 581
 582         /* mode */
 583         ret = regmap_write(dev->regmap, 0x019, 0x05);
 584         if (ret)
 585                 goto err;
 586
 587         ret = regmap_bulk_write(dev->regmap, 0x01a,
 588                                 "\x1b\x16\x0d\x06\x01\xff", 6);
 589         if (ret)
 590                 goto err;
 591
 592         /* FSM */
 593         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
 594         if (ret)
 595                 goto err;
 596
 597         /* PID filter */
 598         ret = regmap_write(dev->regmap, 0x061, 0x60);
 599         if (ret)
 600                 goto err;
 601
 602         /* used RF tuner based settings */
 603         switch (pdata->tuner) {
 604         case RTL2832_SDR_TUNER_E4000:
 605                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 606                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 607                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 608                 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
 609                 ret = regmap_write(dev->regmap, 0x104, 0xd0);
 610                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 611                 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
 612                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 613                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 614                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 615                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 616                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 617                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 618                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 619                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 620                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 621                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 622                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 623                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 624                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 625                 ret = regmap_write(dev->regmap, 0x011, 0xd4);
 626                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 627                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 628                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 629                 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
 630                 ret = regmap_write(dev->regmap, 0x1de, 0xec);
 631                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 632                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 633                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 634                 ret = regmap_write(dev->regmap, 0x00d, 0x83);
 635                 ret = regmap_write(dev->regmap, 0x010, 0x49);
 636                 ret = regmap_write(dev->regmap, 0x00d, 0x87);
 637                 ret = regmap_write(dev->regmap, 0x00d, 0x85);
 638                 ret = regmap_write(dev->regmap, 0x013, 0x02);
 639                 break;
 640         case RTL2832_SDR_TUNER_FC0012:
 641         case RTL2832_SDR_TUNER_FC0013:
 642                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 643                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 644                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 645                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 646                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 647                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 648                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 649                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 650                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 651                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 652                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 653                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 654                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 655                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 656                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 657                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 658                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 659                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 660                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 661                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 662                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
 663                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 664                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 665                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 666                 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
 667                 ret = regmap_write(dev->regmap, 0x1de, 0xef);
 668                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 669                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 670                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 671                 break;
 672         case RTL2832_SDR_TUNER_R820T:
 673         case RTL2832_SDR_TUNER_R828D:
 674                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 675                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 676                 ret = regmap_write(dev->regmap, 0x115, 0x01);
 677                 ret = regmap_write(dev->regmap, 0x103, 0x80);
 678                 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
 679                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 680                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 681                 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
 682                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 683                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 684                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 685                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 686                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 687                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 688                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 689                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 690                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 691                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 692                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 693                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 694                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 695                 ret = regmap_write(dev->regmap, 0x011, 0xf4);
 696                 break;
 697         case RTL2832_SDR_TUNER_FC2580:
 698                 ret = regmap_write(dev->regmap, 0x112, 0x39);
 699                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 700                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 701                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 702                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 703                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 704                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 705                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 706                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 707                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 708                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 709                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 710                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 711                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 712                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 713                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 714                 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
 715                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 716                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 717                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 718                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
 719                 break;
 720         default:
 721                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 722         }
 723
 724         /* software reset */
 725         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
 726         if (ret)
 727                 goto err;
 728
 729         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
 730         if (ret)
 731                 goto err;
 732 err:
 733         return ret;
 734 };
 735
 736 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 737 {
 738         struct platform_device *pdev = dev->pdev;
 739         int ret;
 740
 741         dev_dbg(&pdev->dev, "\n");
 742
 743         /* PID filter */
 744         ret = regmap_write(dev->regmap, 0x061, 0xe0);
 745         if (ret)
 746                 goto err;
 747
 748         /* mode */
 749         ret = regmap_write(dev->regmap, 0x019, 0x20);
 750         if (ret)
 751                 goto err;
 752
 753         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 754         if (ret)
 755                 goto err;
 756
 757         /* FSM */
 758         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
 759         if (ret)
 760                 goto err;
 761
 762         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
 763         if (ret)
 764                 goto err;
 765
 766         ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
 767         if (ret)
 768                 goto err;
 769 err:
 770         return;
 771 };
 772
 773 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 774 {
 775         struct platform_device *pdev = dev->pdev;
 776         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 777         struct dvb_frontend *fe = pdata->dvb_frontend;
 778         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 779         struct v4l2_ctrl *bandwidth_auto;
 780         struct v4l2_ctrl *bandwidth;
 781
 782         /*
 783          * tuner RF (Hz)
 784          */
 785         if (dev->f_tuner == 0)
 786                 return 0;
 787
 788         /*
 789          * bandwidth (Hz)
 790          */
 791         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 792                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 793         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 794         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 795                 c->bandwidth_hz = dev->f_adc;
 796                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 797         } else {
 798                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 799         }
 800
 801         c->frequency = dev->f_tuner;
 802         c->delivery_system = SYS_DVBT;
 803
 804         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 805                 c->frequency, c->bandwidth_hz);
 806
 807         if (!test_bit(POWER_ON, &dev->flags))
 808                 return 0;
 809
 810         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 811                 if (fe->ops.tuner_ops.set_params)
 812                         fe->ops.tuner_ops.set_params(fe);
 813         }
 814
 815         return 0;
 816 };
 817
 818 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 819 {
 820         struct platform_device *pdev = dev->pdev;
 821         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 822         struct dvb_frontend *fe = pdata->dvb_frontend;
 823
 824         dev_dbg(&pdev->dev, "\n");
 825
 826         if (fe->ops.tuner_ops.init)
 827                 fe->ops.tuner_ops.init(fe);
 828
 829         return 0;
 830 };
 831
 832 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 833 {
 834         struct platform_device *pdev = dev->pdev;
 835         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 836         struct dvb_frontend *fe = pdata->dvb_frontend;
 837
 838         dev_dbg(&pdev->dev, "\n");
 839
 840         if (fe->ops.tuner_ops.sleep)
 841                 fe->ops.tuner_ops.sleep(fe);
 842
 843         return;
 844 };
 845
 846 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 847 {
 848         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 849         struct platform_device *pdev = dev->pdev;
 850         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 851         struct dvb_usb_device *d = pdata->dvb_usb_device;
 852         int ret;
 853
 854         dev_dbg(&pdev->dev, "\n");
 855
 856         if (!dev->udev)
 857                 return -ENODEV;
 858
 859         if (mutex_lock_interruptible(&dev->v4l2_lock))
 860                 return -ERESTARTSYS;
 861
 862         if (d->props->power_ctrl)
 863                 d->props->power_ctrl(d, 1);
 864
 865         /* enable ADC */
 866         if (d->props->frontend_ctrl)
 867                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 868
 869         set_bit(POWER_ON, &dev->flags);
 870
 871         /* wake-up tuner */
 872         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 873                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 874         else
 875                 ret = rtl2832_sdr_set_tuner(dev);
 876         if (ret)
 877                 goto err;
 878
 879         ret = rtl2832_sdr_set_tuner_freq(dev);
 880         if (ret)
 881                 goto err;
 882
 883         ret = rtl2832_sdr_set_adc(dev);
 884         if (ret)
 885                 goto err;
 886
 887         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 888         if (ret)
 889                 goto err;
 890
 891         ret = rtl2832_sdr_alloc_urbs(dev);
 892         if (ret)
 893                 goto err;
 894
 895         dev->sequence = 0;
 896
 897         ret = rtl2832_sdr_submit_urbs(dev);
 898         if (ret)
 899                 goto err;
 900
 901 err:
 902         mutex_unlock(&dev->v4l2_lock);
 903
 904         return ret;
 905 }
 906
 907 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 908 {
 909         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 910         struct platform_device *pdev = dev->pdev;
 911         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 912         struct dvb_usb_device *d = pdata->dvb_usb_device;
 913
 914         dev_dbg(&pdev->dev, "\n");
 915
 916         mutex_lock(&dev->v4l2_lock);
 917
 918         rtl2832_sdr_kill_urbs(dev);
 919         rtl2832_sdr_free_urbs(dev);
 920         rtl2832_sdr_free_stream_bufs(dev);
 921         rtl2832_sdr_cleanup_queued_bufs(dev);
 922         rtl2832_sdr_unset_adc(dev);
 923
 924         /* sleep tuner */
 925         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 926                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 927         else
 928                 rtl2832_sdr_unset_tuner(dev);
 929
 930         clear_bit(POWER_ON, &dev->flags);
 931
 932         /* disable ADC */
 933         if (d->props->frontend_ctrl)
 934                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 935
 936         if (d->props->power_ctrl)
 937                 d->props->power_ctrl(d, 0);
 938
 939         mutex_unlock(&dev->v4l2_lock);
 940 }
 941
 942 static const struct vb2_ops rtl2832_sdr_vb2_ops = {
 943         .queue_setup            = rtl2832_sdr_queue_setup,
 944         .buf_prepare            = rtl2832_sdr_buf_prepare,
 945         .buf_queue              = rtl2832_sdr_buf_queue,
 946         .start_streaming        = rtl2832_sdr_start_streaming,
 947         .stop_streaming         = rtl2832_sdr_stop_streaming,
 948         .wait_prepare           = vb2_ops_wait_prepare,
 949         .wait_finish            = vb2_ops_wait_finish,
 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         strscpy(f->description, formats[f->index].name, sizeof(f->description));
1120         f->pixelformat = formats[f->index].pixelformat;
1121
1122         return 0;
1123 }
1124
1125 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1126                 struct v4l2_format *f)
1127 {
1128         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1129         struct platform_device *pdev = dev->pdev;
1130
1131         dev_dbg(&pdev->dev, "\n");
1132
1133         f->fmt.sdr.pixelformat = dev->pixelformat;
1134         f->fmt.sdr.buffersize = dev->buffersize;
1135
1136         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1137
1138         return 0;
1139 }
1140
1141 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1142                 struct v4l2_format *f)
1143 {
1144         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1145         struct platform_device *pdev = dev->pdev;
1146         struct vb2_queue *q = &dev->vb_queue;
1147         int i;
1148
1149         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1150                 (char *)&f->fmt.sdr.pixelformat);
1151
1152         if (vb2_is_busy(q))
1153                 return -EBUSY;
1154
1155         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1156         for (i = 0; i < dev->num_formats; i++) {
1157                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1158                         dev->pixelformat = formats[i].pixelformat;
1159                         dev->buffersize = formats[i].buffersize;
1160                         f->fmt.sdr.buffersize = formats[i].buffersize;
1161                         return 0;
1162                 }
1163         }
1164
1165         dev->pixelformat = formats[0].pixelformat;
1166         dev->buffersize = formats[0].buffersize;
1167         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1168         f->fmt.sdr.buffersize = formats[0].buffersize;
1169
1170         return 0;
1171 }
1172
1173 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1174                 struct v4l2_format *f)
1175 {
1176         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1177         struct platform_device *pdev = dev->pdev;
1178         int i;
1179
1180         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1181                 (char *)&f->fmt.sdr.pixelformat);
1182
1183         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1184         for (i = 0; i < dev->num_formats; i++) {
1185                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1186                         f->fmt.sdr.buffersize = formats[i].buffersize;
1187                         return 0;
1188                 }
1189         }
1190
1191         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1192         f->fmt.sdr.buffersize = formats[0].buffersize;
1193
1194         return 0;
1195 }
1196
1197 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1198         .vidioc_querycap          = rtl2832_sdr_querycap,
1199
1200         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1201         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1202         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1203         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1204
1205         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1206         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1207         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1208         .vidioc_querybuf          = vb2_ioctl_querybuf,
1209         .vidioc_qbuf              = vb2_ioctl_qbuf,
1210         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1211
1212         .vidioc_streamon          = vb2_ioctl_streamon,
1213         .vidioc_streamoff         = vb2_ioctl_streamoff,
1214
1215         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1216         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1217
1218         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1219         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1220         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1221
1222         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1223         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1224         .vidioc_log_status        = v4l2_ctrl_log_status,
1225 };
1226
1227 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1228         .owner                    = THIS_MODULE,
1229         .open                     = v4l2_fh_open,
1230         .release                  = vb2_fop_release,
1231         .read                     = vb2_fop_read,
1232         .poll                     = vb2_fop_poll,
1233         .mmap                     = vb2_fop_mmap,
1234         .unlocked_ioctl           = video_ioctl2,
1235 };
1236
1237 static struct video_device rtl2832_sdr_template = {
1238         .name                     = "Realtek RTL2832 SDR",
1239         .release                  = video_device_release_empty,
1240         .fops                     = &rtl2832_sdr_fops,
1241         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1242         .device_caps              = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1243                                     V4L2_CAP_READWRITE | V4L2_CAP_TUNER,
1244 };
1245
1246 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1247 {
1248         struct rtl2832_sdr_dev *dev =
1249                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1250                                         hdl);
1251         struct platform_device *pdev = dev->pdev;
1252         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1253         struct dvb_frontend *fe = pdata->dvb_frontend;
1254         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1255         int ret;
1256
1257         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1258                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1259                 ctrl->step);
1260
1261         switch (ctrl->id) {
1262         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1263         case V4L2_CID_RF_TUNER_BANDWIDTH:
1264                 /* TODO: these controls should be moved to tuner drivers */
1265                 if (dev->bandwidth_auto->val) {
1266                         /* Round towards the closest legal value */
1267                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1268                         u32 offset;
1269
1270                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1271                                       dev->bandwidth->maximum);
1272                         offset = val - dev->bandwidth->minimum;
1273                         offset = dev->bandwidth->step *
1274                                 div_u64(offset, dev->bandwidth->step);
1275                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1276                 }
1277                 c->bandwidth_hz = dev->bandwidth->val;
1278
1279                 if (!test_bit(POWER_ON, &dev->flags))
1280                         return 0;
1281
1282                 if (fe->ops.tuner_ops.set_params)
1283                         ret = fe->ops.tuner_ops.set_params(fe);
1284                 else
1285                         ret = 0;
1286                 break;
1287         default:
1288                 ret = -EINVAL;
1289         }
1290
1291         return ret;
1292 }
1293
1294 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1295         .s_ctrl = rtl2832_sdr_s_ctrl,
1296 };
1297
1298 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1299 {
1300         struct rtl2832_sdr_dev *dev =
1301                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1302         struct platform_device *pdev = dev->pdev;
1303
1304         dev_dbg(&pdev->dev, "\n");
1305
1306         v4l2_ctrl_handler_free(&dev->hdl);
1307         v4l2_device_unregister(&dev->v4l2_dev);
1308         kfree(dev);
1309 }
1310
1311 /* Platform driver interface */
1312 static int rtl2832_sdr_probe(struct platform_device *pdev)
1313 {
1314         struct rtl2832_sdr_dev *dev;
1315         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1316         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1317         struct v4l2_subdev *subdev;
1318         int ret;
1319
1320         dev_dbg(&pdev->dev, "\n");
1321
1322         if (!pdata) {
1323                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1324                 ret = -EINVAL;
1325                 goto err;
1326         }
1327         if (!pdev->dev.parent->driver) {
1328                 dev_dbg(&pdev->dev, "No parent device\n");
1329                 ret = -EINVAL;
1330                 goto err;
1331         }
1332         /* try to refcount host drv since we are the consumer */
1333         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1334                 dev_err(&pdev->dev, "Refcount fail");
1335                 ret = -EINVAL;
1336                 goto err;
1337         }
1338         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1339         if (dev == NULL) {
1340                 ret = -ENOMEM;
1341                 goto err_module_put;
1342         }
1343
1344         /* setup the state */
1345         subdev = pdata->v4l2_subdev;
1346         dev->v4l2_subdev = pdata->v4l2_subdev;
1347         dev->pdev = pdev;
1348         dev->regmap = pdata->regmap;
1349         dev->udev = pdata->dvb_usb_device->udev;
1350         dev->f_adc = bands_adc[0].rangelow;
1351         dev->f_tuner = bands_fm[0].rangelow;
1352         dev->pixelformat = formats[0].pixelformat;
1353         dev->buffersize = formats[0].buffersize;
1354         dev->num_formats = NUM_FORMATS;
1355         if (!rtl2832_sdr_emulated_fmt)
1356                 dev->num_formats -= 1;
1357
1358         mutex_init(&dev->v4l2_lock);
1359         mutex_init(&dev->vb_queue_lock);
1360         spin_lock_init(&dev->queued_bufs_lock);
1361         INIT_LIST_HEAD(&dev->queued_bufs);
1362
1363         /* Init videobuf2 queue structure */
1364         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1365         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1366         dev->vb_queue.drv_priv = dev;
1367         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1368         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1369         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1370         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1371         ret = vb2_queue_init(&dev->vb_queue);
1372         if (ret) {
1373                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1374                 goto err_kfree;
1375         }
1376
1377         /* Register controls */
1378         switch (pdata->tuner) {
1379         case RTL2832_SDR_TUNER_E4000:
1380                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1381                 if (subdev)
1382                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1383                                               NULL, true);
1384                 break;
1385         case RTL2832_SDR_TUNER_R820T:
1386         case RTL2832_SDR_TUNER_R828D:
1387                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1388                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1389                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1390                                                         0, 1, 1, 1);
1391                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1392                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1393                                                    0, 8000000, 100000, 0);
1394                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1395                 break;
1396         case RTL2832_SDR_TUNER_FC0012:
1397         case RTL2832_SDR_TUNER_FC0013:
1398                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1399                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1400                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1401                                                         0, 1, 1, 1);
1402                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1403                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1404                                                    6000000, 8000000, 1000000,
1405                                                    6000000);
1406                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1407                 break;
1408         case RTL2832_SDR_TUNER_FC2580:
1409                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1410                 if (subdev)
1411                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1412                                               NULL, true);
1413                 break;
1414         default:
1415                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1416                 dev_err(&pdev->dev, "Unsupported tuner\n");
1417                 goto err_v4l2_ctrl_handler_free;
1418         }
1419         if (dev->hdl.error) {
1420                 ret = dev->hdl.error;
1421                 dev_err(&pdev->dev, "Could not initialize controls\n");
1422                 goto err_v4l2_ctrl_handler_free;
1423         }
1424
1425         /* Init video_device structure */
1426         dev->vdev = rtl2832_sdr_template;
1427         dev->vdev.queue = &dev->vb_queue;
1428         dev->vdev.queue->lock = &dev->vb_queue_lock;
1429         video_set_drvdata(&dev->vdev, dev);
1430
1431         /* Register the v4l2_device structure */
1432         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1433         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1434         if (ret) {
1435                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1436                 goto err_v4l2_ctrl_handler_free;
1437         }
1438
1439         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1440         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1441         dev->vdev.lock = &dev->v4l2_lock;
1442         dev->vdev.vfl_dir = VFL_DIR_RX;
1443
1444         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1445         if (ret) {
1446                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1447                         ret);
1448                 goto err_v4l2_device_unregister;
1449         }
1450         dev_info(&pdev->dev, "Registered as %s\n",
1451                  video_device_node_name(&dev->vdev));
1452         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1453         dev_notice(&pdev->dev,
1454                    "SDR API is still slightly experimental and functionality changes may follow\n");
1455         platform_set_drvdata(pdev, dev);
1456         return 0;
1457 err_v4l2_device_unregister:
1458         v4l2_device_unregister(&dev->v4l2_dev);
1459 err_v4l2_ctrl_handler_free:
1460         v4l2_ctrl_handler_free(&dev->hdl);
1461 err_kfree:
1462         kfree(dev);
1463 err_module_put:
1464         module_put(pdev->dev.parent->driver->owner);
1465 err:
1466         return ret;
1467 }
1468
1469 static int rtl2832_sdr_remove(struct platform_device *pdev)
1470 {
1471         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1472
1473         dev_dbg(&pdev->dev, "\n");
1474
1475         mutex_lock(&dev->vb_queue_lock);
1476         mutex_lock(&dev->v4l2_lock);
1477         /* No need to keep the urbs around after disconnection */
1478         dev->udev = NULL;
1479         v4l2_device_disconnect(&dev->v4l2_dev);
1480         video_unregister_device(&dev->vdev);
1481         mutex_unlock(&dev->v4l2_lock);
1482         mutex_unlock(&dev->vb_queue_lock);
1483         v4l2_device_put(&dev->v4l2_dev);
1484         module_put(pdev->dev.parent->driver->owner);
1485
1486         return 0;
1487 }
1488
1489 static struct platform_driver rtl2832_sdr_driver = {
1490         .driver = {
1491                 .name   = "rtl2832_sdr",
1492         },
1493         .probe          = rtl2832_sdr_probe,
1494         .remove         = rtl2832_sdr_remove,
1495 };
1496 module_platform_driver(rtl2832_sdr_driver);
1497
1498 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1499 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1500 MODULE_LICENSE("GPL");