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                 .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                                                "videobuf 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                         return -ENOMEM;
 382                 }
 383                 usb_fill_bulk_urb(dev->urb_list[i],
 384                                 dev->udev,
 385                                 usb_rcvbulkpipe(dev->udev, 0x81),
 386                                 dev->buf_list[i],
 387                                 BULK_BUFFER_SIZE,
 388                                 rtl2832_sdr_urb_complete, dev);
 389
 390                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 391                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 392                 dev->urbs_initialized++;
 393         }
 394
 395         return 0;
 396 }
 397
 398 /* Must be called with vb_queue_lock hold */
 399 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 400 {
 401         struct platform_device *pdev = dev->pdev;
 402         unsigned long flags;
 403
 404         dev_dbg(&pdev->dev, "\n");
 405
 406         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 407         while (!list_empty(&dev->queued_bufs)) {
 408                 struct rtl2832_sdr_frame_buf *buf;
 409
 410                 buf = list_entry(dev->queued_bufs.next,
 411                                 struct rtl2832_sdr_frame_buf, list);
 412                 list_del(&buf->list);
 413                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 414         }
 415         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 416 }
 417
 418 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 419                 struct v4l2_capability *cap)
 420 {
 421         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 422         struct platform_device *pdev = dev->pdev;
 423
 424         dev_dbg(&pdev->dev, "\n");
 425
 426         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 427         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 428         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 429         return 0;
 430 }
 431
 432 /* Videobuf2 operations */
 433 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 434                 unsigned int *nbuffers,
 435                 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
 436 {
 437         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 438         struct platform_device *pdev = dev->pdev;
 439
 440         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 441
 442         /* Need at least 8 buffers */
 443         if (vq->num_buffers + *nbuffers < 8)
 444                 *nbuffers = 8 - vq->num_buffers;
 445         *nplanes = 1;
 446         sizes[0] = PAGE_ALIGN(dev->buffersize);
 447         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 448         return 0;
 449 }
 450
 451 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 452 {
 453         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 454
 455         /* Don't allow queueing new buffers after device disconnection */
 456         if (!dev->udev)
 457                 return -ENODEV;
 458
 459         return 0;
 460 }
 461
 462 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 463 {
 464         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 465         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 466         struct rtl2832_sdr_frame_buf *buf =
 467                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 468         unsigned long flags;
 469
 470         /* Check the device has not disconnected between prep and queuing */
 471         if (!dev->udev) {
 472                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 473                 return;
 474         }
 475
 476         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 477         list_add_tail(&buf->list, &dev->queued_bufs);
 478         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 479 }
 480
 481 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 482 {
 483         struct platform_device *pdev = dev->pdev;
 484         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 485         struct dvb_frontend *fe = pdata->dvb_frontend;
 486         int ret;
 487         unsigned int f_sr, f_if;
 488         u8 buf[4], u8tmp1, u8tmp2;
 489         u64 u64tmp;
 490         u32 u32tmp;
 491
 492         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 493
 494         if (!test_bit(POWER_ON, &dev->flags))
 495                 return 0;
 496
 497         if (dev->f_adc == 0)
 498                 return 0;
 499
 500         f_sr = dev->f_adc;
 501
 502         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
 503         if (ret)
 504                 goto err;
 505
 506         ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
 507         if (ret)
 508                 goto err;
 509
 510         /* get IF from tuner */
 511         if (fe->ops.tuner_ops.get_if_frequency)
 512                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 513         else
 514                 ret = -EINVAL;
 515
 516         if (ret)
 517                 goto err;
 518
 519         /* program IF */
 520         u64tmp = f_if % pdata->clk;
 521         u64tmp *= 0x400000;
 522         u64tmp = div_u64(u64tmp, pdata->clk);
 523         u64tmp = -u64tmp;
 524         u32tmp = u64tmp & 0x3fffff;
 525
 526         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 527
 528         buf[0] = (u32tmp >> 16) & 0xff;
 529         buf[1] = (u32tmp >>  8) & 0xff;
 530         buf[2] = (u32tmp >>  0) & 0xff;
 531
 532         ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
 533         if (ret)
 534                 goto err;
 535
 536         /* BB / IF mode */
 537         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 538         if (f_if) {
 539                 u8tmp1 = 0x1a; /* disable Zero-IF */
 540                 u8tmp2 = 0x8d; /* enable ADC I */
 541         } else {
 542                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 543                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 544         }
 545
 546         ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
 547         if (ret)
 548                 goto err;
 549
 550         ret = regmap_write(dev->regmap, 0x008, u8tmp2);
 551         if (ret)
 552                 goto err;
 553
 554         ret = regmap_write(dev->regmap, 0x006, 0x80);
 555         if (ret)
 556                 goto err;
 557
 558         /* program sampling rate (resampling down) */
 559         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 560         u32tmp <<= 2;
 561         buf[0] = (u32tmp >> 24) & 0xff;
 562         buf[1] = (u32tmp >> 16) & 0xff;
 563         buf[2] = (u32tmp >>  8) & 0xff;
 564         buf[3] = (u32tmp >>  0) & 0xff;
 565         ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
 566         if (ret)
 567                 goto err;
 568
 569         /* low-pass filter */
 570         ret = regmap_bulk_write(dev->regmap, 0x11c,
 571                                 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 572                                 20);
 573         if (ret)
 574                 goto err;
 575
 576         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 577         if (ret)
 578                 goto err;
 579
 580         /* mode */
 581         ret = regmap_write(dev->regmap, 0x019, 0x05);
 582         if (ret)
 583                 goto err;
 584
 585         ret = regmap_bulk_write(dev->regmap, 0x01a,
 586                                 "\x1b\x16\x0d\x06\x01\xff", 6);
 587         if (ret)
 588                 goto err;
 589
 590         /* FSM */
 591         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
 592         if (ret)
 593                 goto err;
 594
 595         /* PID filter */
 596         ret = regmap_write(dev->regmap, 0x061, 0x60);
 597         if (ret)
 598                 goto err;
 599
 600         /* used RF tuner based settings */
 601         switch (pdata->tuner) {
 602         case RTL2832_SDR_TUNER_E4000:
 603                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 604                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 605                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 606                 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
 607                 ret = regmap_write(dev->regmap, 0x104, 0xd0);
 608                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 609                 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
 610                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 611                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 612                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 613                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 614                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 615                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 616                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 617                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 618                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 619                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 620                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 621                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 622                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 623                 ret = regmap_write(dev->regmap, 0x011, 0xd4);
 624                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 625                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 626                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 627                 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
 628                 ret = regmap_write(dev->regmap, 0x1de, 0xec);
 629                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 630                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 631                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 632                 ret = regmap_write(dev->regmap, 0x00d, 0x83);
 633                 ret = regmap_write(dev->regmap, 0x010, 0x49);
 634                 ret = regmap_write(dev->regmap, 0x00d, 0x87);
 635                 ret = regmap_write(dev->regmap, 0x00d, 0x85);
 636                 ret = regmap_write(dev->regmap, 0x013, 0x02);
 637                 break;
 638         case RTL2832_SDR_TUNER_FC0012:
 639         case RTL2832_SDR_TUNER_FC0013:
 640                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 641                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 642                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 643                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 644                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 645                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 646                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 647                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 648                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 649                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 650                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 651                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 652                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 653                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 654                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 655                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 656                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 657                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 658                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 659                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 660                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
 661                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 662                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 663                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 664                 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
 665                 ret = regmap_write(dev->regmap, 0x1de, 0xef);
 666                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 667                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 668                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 669                 break;
 670         case RTL2832_SDR_TUNER_R820T:
 671         case RTL2832_SDR_TUNER_R828D:
 672                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 673                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 674                 ret = regmap_write(dev->regmap, 0x115, 0x01);
 675                 ret = regmap_write(dev->regmap, 0x103, 0x80);
 676                 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
 677                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 678                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 679                 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
 680                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 681                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 682                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 683                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 684                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 685                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 686                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 687                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 688                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 689                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 690                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 691                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 692                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 693                 ret = regmap_write(dev->regmap, 0x011, 0xf4);
 694                 break;
 695         case RTL2832_SDR_TUNER_FC2580:
 696                 ret = regmap_write(dev->regmap, 0x112, 0x39);
 697                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 698                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 699                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 700                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 701                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 702                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 703                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 704                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 705                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 706                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 707                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 708                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 709                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 710                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 711                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 712                 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
 713                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 714                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 715                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 716                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
 717                 break;
 718         default:
 719                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 720         }
 721
 722         /* software reset */
 723         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
 724         if (ret)
 725                 goto err;
 726
 727         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
 728         if (ret)
 729                 goto err;
 730 err:
 731         return ret;
 732 };
 733
 734 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 735 {
 736         struct platform_device *pdev = dev->pdev;
 737         int ret;
 738
 739         dev_dbg(&pdev->dev, "\n");
 740
 741         /* PID filter */
 742         ret = regmap_write(dev->regmap, 0x061, 0xe0);
 743         if (ret)
 744                 goto err;
 745
 746         /* mode */
 747         ret = regmap_write(dev->regmap, 0x019, 0x20);
 748         if (ret)
 749                 goto err;
 750
 751         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 752         if (ret)
 753                 goto err;
 754
 755         /* FSM */
 756         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
 757         if (ret)
 758                 goto err;
 759
 760         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
 761         if (ret)
 762                 goto err;
 763
 764         ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
 765         if (ret)
 766                 goto err;
 767 err:
 768         return;
 769 };
 770
 771 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 772 {
 773         struct platform_device *pdev = dev->pdev;
 774         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 775         struct dvb_frontend *fe = pdata->dvb_frontend;
 776         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 777         struct v4l2_ctrl *bandwidth_auto;
 778         struct v4l2_ctrl *bandwidth;
 779
 780         /*
 781          * tuner RF (Hz)
 782          */
 783         if (dev->f_tuner == 0)
 784                 return 0;
 785
 786         /*
 787          * bandwidth (Hz)
 788          */
 789         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 790                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 791         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 792         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 793                 c->bandwidth_hz = dev->f_adc;
 794                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 795         } else {
 796                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 797         }
 798
 799         c->frequency = dev->f_tuner;
 800         c->delivery_system = SYS_DVBT;
 801
 802         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 803                 c->frequency, c->bandwidth_hz);
 804
 805         if (!test_bit(POWER_ON, &dev->flags))
 806                 return 0;
 807
 808         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 809                 if (fe->ops.tuner_ops.set_params)
 810                         fe->ops.tuner_ops.set_params(fe);
 811         }
 812
 813         return 0;
 814 };
 815
 816 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 817 {
 818         struct platform_device *pdev = dev->pdev;
 819         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 820         struct dvb_frontend *fe = pdata->dvb_frontend;
 821
 822         dev_dbg(&pdev->dev, "\n");
 823
 824         if (fe->ops.tuner_ops.init)
 825                 fe->ops.tuner_ops.init(fe);
 826
 827         return 0;
 828 };
 829
 830 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 831 {
 832         struct platform_device *pdev = dev->pdev;
 833         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 834         struct dvb_frontend *fe = pdata->dvb_frontend;
 835
 836         dev_dbg(&pdev->dev, "\n");
 837
 838         if (fe->ops.tuner_ops.sleep)
 839                 fe->ops.tuner_ops.sleep(fe);
 840
 841         return;
 842 };
 843
 844 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 845 {
 846         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 847         struct platform_device *pdev = dev->pdev;
 848         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 849         struct dvb_usb_device *d = pdata->dvb_usb_device;
 850         int ret;
 851
 852         dev_dbg(&pdev->dev, "\n");
 853
 854         if (!dev->udev)
 855                 return -ENODEV;
 856
 857         if (mutex_lock_interruptible(&dev->v4l2_lock))
 858                 return -ERESTARTSYS;
 859
 860         if (d->props->power_ctrl)
 861                 d->props->power_ctrl(d, 1);
 862
 863         /* enable ADC */
 864         if (d->props->frontend_ctrl)
 865                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 866
 867         set_bit(POWER_ON, &dev->flags);
 868
 869         /* wake-up tuner */
 870         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 871                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 872         else
 873                 ret = rtl2832_sdr_set_tuner(dev);
 874         if (ret)
 875                 goto err;
 876
 877         ret = rtl2832_sdr_set_tuner_freq(dev);
 878         if (ret)
 879                 goto err;
 880
 881         ret = rtl2832_sdr_set_adc(dev);
 882         if (ret)
 883                 goto err;
 884
 885         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 886         if (ret)
 887                 goto err;
 888
 889         ret = rtl2832_sdr_alloc_urbs(dev);
 890         if (ret)
 891                 goto err;
 892
 893         dev->sequence = 0;
 894
 895         ret = rtl2832_sdr_submit_urbs(dev);
 896         if (ret)
 897                 goto err;
 898
 899 err:
 900         mutex_unlock(&dev->v4l2_lock);
 901
 902         return ret;
 903 }
 904
 905 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 906 {
 907         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 908         struct platform_device *pdev = dev->pdev;
 909         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 910         struct dvb_usb_device *d = pdata->dvb_usb_device;
 911
 912         dev_dbg(&pdev->dev, "\n");
 913
 914         mutex_lock(&dev->v4l2_lock);
 915
 916         rtl2832_sdr_kill_urbs(dev);
 917         rtl2832_sdr_free_urbs(dev);
 918         rtl2832_sdr_free_stream_bufs(dev);
 919         rtl2832_sdr_cleanup_queued_bufs(dev);
 920         rtl2832_sdr_unset_adc(dev);
 921
 922         /* sleep tuner */
 923         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 924                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 925         else
 926                 rtl2832_sdr_unset_tuner(dev);
 927
 928         clear_bit(POWER_ON, &dev->flags);
 929
 930         /* disable ADC */
 931         if (d->props->frontend_ctrl)
 932                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 933
 934         if (d->props->power_ctrl)
 935                 d->props->power_ctrl(d, 0);
 936
 937         mutex_unlock(&dev->v4l2_lock);
 938 }
 939
 940 static const struct vb2_ops rtl2832_sdr_vb2_ops = {
 941         .queue_setup            = rtl2832_sdr_queue_setup,
 942         .buf_prepare            = rtl2832_sdr_buf_prepare,
 943         .buf_queue              = rtl2832_sdr_buf_queue,
 944         .start_streaming        = rtl2832_sdr_start_streaming,
 945         .stop_streaming         = rtl2832_sdr_stop_streaming,
 946         .wait_prepare           = vb2_ops_wait_prepare,
 947         .wait_finish            = vb2_ops_wait_finish,
 948 };
 949
 950 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
 951                 struct v4l2_tuner *v)
 952 {
 953         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 954         struct platform_device *pdev = dev->pdev;
 955         int ret;
 956
 957         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
 958
 959         if (v->index == 0) {
 960                 strscpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
 961                 v->type = V4L2_TUNER_ADC;
 962                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 963                 v->rangelow =   300000;
 964                 v->rangehigh = 3200000;
 965                 ret = 0;
 966         } else if (v->index == 1 &&
 967                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
 968                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
 969         } else if (v->index == 1) {
 970                 strscpy(v->name, "RF: <unknown>", sizeof(v->name));
 971                 v->type = V4L2_TUNER_RF;
 972                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 973                 v->rangelow =    50000000;
 974                 v->rangehigh = 2000000000;
 975                 ret = 0;
 976         } else {
 977                 ret = -EINVAL;
 978         }
 979         return ret;
 980 }
 981
 982 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
 983                 const struct v4l2_tuner *v)
 984 {
 985         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 986         struct platform_device *pdev = dev->pdev;
 987         int ret;
 988
 989         dev_dbg(&pdev->dev, "\n");
 990
 991         if (v->index == 0) {
 992                 ret = 0;
 993         } else if (v->index == 1 &&
 994                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
 995                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 996         } else if (v->index == 1) {
 997                 ret = 0;
 998         } else {
 999                 ret = -EINVAL;
1000         }
1001         return ret;
1002 }
1003
1004 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1005                 struct v4l2_frequency_band *band)
1006 {
1007         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1008         struct platform_device *pdev = dev->pdev;
1009         int ret;
1010
1011         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1012                 band->tuner, band->type, band->index);
1013
1014         if (band->tuner == 0) {
1015                 if (band->index >= ARRAY_SIZE(bands_adc))
1016                         return -EINVAL;
1017
1018                 *band = bands_adc[band->index];
1019                 ret = 0;
1020         } else if (band->tuner == 1 &&
1021                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1022                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1023         } else if (band->tuner == 1) {
1024                 if (band->index >= ARRAY_SIZE(bands_fm))
1025                         return -EINVAL;
1026
1027                 *band = bands_fm[band->index];
1028                 ret = 0;
1029         } else {
1030                 ret = -EINVAL;
1031         }
1032         return ret;
1033 }
1034
1035 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1036                 struct v4l2_frequency *f)
1037 {
1038         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1039         struct platform_device *pdev = dev->pdev;
1040         int ret;
1041
1042         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1043
1044         if (f->tuner == 0) {
1045                 f->frequency = dev->f_adc;
1046                 f->type = V4L2_TUNER_ADC;
1047                 ret = 0;
1048         } else if (f->tuner == 1 &&
1049                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1050                 f->type = V4L2_TUNER_RF;
1051                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1052         } else if (f->tuner == 1) {
1053                 f->frequency = dev->f_tuner;
1054                 f->type = V4L2_TUNER_RF;
1055                 ret = 0;
1056         } else {
1057                 ret = -EINVAL;
1058         }
1059         return ret;
1060 }
1061
1062 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1063                 const struct v4l2_frequency *f)
1064 {
1065         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1066         struct platform_device *pdev = dev->pdev;
1067         int ret, band;
1068
1069         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1070                 f->tuner, f->type, f->frequency);
1071
1072         /* ADC band midpoints */
1073         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1074         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1075
1076         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1077                 if (f->frequency < BAND_ADC_0)
1078                         band = 0;
1079                 else if (f->frequency < BAND_ADC_1)
1080                         band = 1;
1081                 else
1082                         band = 2;
1083
1084                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1085                                      bands_adc[band].rangelow,
1086                                      bands_adc[band].rangehigh);
1087
1088                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1089                 ret = rtl2832_sdr_set_adc(dev);
1090         } else if (f->tuner == 1 &&
1091                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1092                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1093         } else if (f->tuner == 1) {
1094                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1095                                 bands_fm[0].rangelow,
1096                                 bands_fm[0].rangehigh);
1097                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1098
1099                 ret = rtl2832_sdr_set_tuner_freq(dev);
1100         } else {
1101                 ret = -EINVAL;
1102         }
1103         return ret;
1104 }
1105
1106 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1107                 struct v4l2_fmtdesc *f)
1108 {
1109         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1110         struct platform_device *pdev = dev->pdev;
1111
1112         dev_dbg(&pdev->dev, "\n");
1113
1114         if (f->index >= dev->num_formats)
1115                 return -EINVAL;
1116
1117         f->pixelformat = formats[f->index].pixelformat;
1118
1119         return 0;
1120 }
1121
1122 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1123                 struct v4l2_format *f)
1124 {
1125         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1126         struct platform_device *pdev = dev->pdev;
1127
1128         dev_dbg(&pdev->dev, "\n");
1129
1130         f->fmt.sdr.pixelformat = dev->pixelformat;
1131         f->fmt.sdr.buffersize = dev->buffersize;
1132
1133         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
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         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1153         for (i = 0; i < dev->num_formats; i++) {
1154                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1155                         dev->pixelformat = formats[i].pixelformat;
1156                         dev->buffersize = formats[i].buffersize;
1157                         f->fmt.sdr.buffersize = formats[i].buffersize;
1158                         return 0;
1159                 }
1160         }
1161
1162         dev->pixelformat = formats[0].pixelformat;
1163         dev->buffersize = formats[0].buffersize;
1164         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1165         f->fmt.sdr.buffersize = formats[0].buffersize;
1166
1167         return 0;
1168 }
1169
1170 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1171                 struct v4l2_format *f)
1172 {
1173         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1174         struct platform_device *pdev = dev->pdev;
1175         int i;
1176
1177         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1178                 (char *)&f->fmt.sdr.pixelformat);
1179
1180         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1181         for (i = 0; i < dev->num_formats; i++) {
1182                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1183                         f->fmt.sdr.buffersize = formats[i].buffersize;
1184                         return 0;
1185                 }
1186         }
1187
1188         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1189         f->fmt.sdr.buffersize = formats[0].buffersize;
1190
1191         return 0;
1192 }
1193
1194 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1195         .vidioc_querycap          = rtl2832_sdr_querycap,
1196
1197         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1198         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1199         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1200         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1201
1202         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1203         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1204         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1205         .vidioc_querybuf          = vb2_ioctl_querybuf,
1206         .vidioc_qbuf              = vb2_ioctl_qbuf,
1207         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1208
1209         .vidioc_streamon          = vb2_ioctl_streamon,
1210         .vidioc_streamoff         = vb2_ioctl_streamoff,
1211
1212         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1213         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1214
1215         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1216         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1217         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1218
1219         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1220         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1221         .vidioc_log_status        = v4l2_ctrl_log_status,
1222 };
1223
1224 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1225         .owner                    = THIS_MODULE,
1226         .open                     = v4l2_fh_open,
1227         .release                  = vb2_fop_release,
1228         .read                     = vb2_fop_read,
1229         .poll                     = vb2_fop_poll,
1230         .mmap                     = vb2_fop_mmap,
1231         .unlocked_ioctl           = video_ioctl2,
1232 };
1233
1234 static struct video_device rtl2832_sdr_template = {
1235         .name                     = "Realtek RTL2832 SDR",
1236         .release                  = video_device_release_empty,
1237         .fops                     = &rtl2832_sdr_fops,
1238         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1239         .device_caps              = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1240                                     V4L2_CAP_READWRITE | V4L2_CAP_TUNER,
1241 };
1242
1243 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1244 {
1245         struct rtl2832_sdr_dev *dev =
1246                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1247                                         hdl);
1248         struct platform_device *pdev = dev->pdev;
1249         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1250         struct dvb_frontend *fe = pdata->dvb_frontend;
1251         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1252         int ret;
1253
1254         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1255                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1256                 ctrl->step);
1257
1258         switch (ctrl->id) {
1259         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1260         case V4L2_CID_RF_TUNER_BANDWIDTH:
1261                 /* TODO: these controls should be moved to tuner drivers */
1262                 if (dev->bandwidth_auto->val) {
1263                         /* Round towards the closest legal value */
1264                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1265                         u32 offset;
1266
1267                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1268                                       dev->bandwidth->maximum);
1269                         offset = val - dev->bandwidth->minimum;
1270                         offset = dev->bandwidth->step *
1271                                 div_u64(offset, dev->bandwidth->step);
1272                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1273                 }
1274                 c->bandwidth_hz = dev->bandwidth->val;
1275
1276                 if (!test_bit(POWER_ON, &dev->flags))
1277                         return 0;
1278
1279                 if (fe->ops.tuner_ops.set_params)
1280                         ret = fe->ops.tuner_ops.set_params(fe);
1281                 else
1282                         ret = 0;
1283                 break;
1284         default:
1285                 ret = -EINVAL;
1286         }
1287
1288         return ret;
1289 }
1290
1291 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1292         .s_ctrl = rtl2832_sdr_s_ctrl,
1293 };
1294
1295 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1296 {
1297         struct rtl2832_sdr_dev *dev =
1298                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1299         struct platform_device *pdev = dev->pdev;
1300
1301         dev_dbg(&pdev->dev, "\n");
1302
1303         v4l2_ctrl_handler_free(&dev->hdl);
1304         v4l2_device_unregister(&dev->v4l2_dev);
1305         kfree(dev);
1306 }
1307
1308 /* Platform driver interface */
1309 static int rtl2832_sdr_probe(struct platform_device *pdev)
1310 {
1311         struct rtl2832_sdr_dev *dev;
1312         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1313         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1314         struct v4l2_subdev *subdev;
1315         int ret;
1316
1317         dev_dbg(&pdev->dev, "\n");
1318
1319         if (!pdata) {
1320                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1321                 ret = -EINVAL;
1322                 goto err;
1323         }
1324         if (!pdev->dev.parent->driver) {
1325                 dev_dbg(&pdev->dev, "No parent device\n");
1326                 ret = -EINVAL;
1327                 goto err;
1328         }
1329         /* try to refcount host drv since we are the consumer */
1330         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1331                 dev_err(&pdev->dev, "Refcount fail");
1332                 ret = -EINVAL;
1333                 goto err;
1334         }
1335         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1336         if (dev == NULL) {
1337                 ret = -ENOMEM;
1338                 goto err_module_put;
1339         }
1340
1341         /* setup the state */
1342         subdev = pdata->v4l2_subdev;
1343         dev->v4l2_subdev = pdata->v4l2_subdev;
1344         dev->pdev = pdev;
1345         dev->regmap = pdata->regmap;
1346         dev->udev = pdata->dvb_usb_device->udev;
1347         dev->f_adc = bands_adc[0].rangelow;
1348         dev->f_tuner = bands_fm[0].rangelow;
1349         dev->pixelformat = formats[0].pixelformat;
1350         dev->buffersize = formats[0].buffersize;
1351         dev->num_formats = NUM_FORMATS;
1352         if (!rtl2832_sdr_emulated_fmt)
1353                 dev->num_formats -= 1;
1354
1355         mutex_init(&dev->v4l2_lock);
1356         mutex_init(&dev->vb_queue_lock);
1357         spin_lock_init(&dev->queued_bufs_lock);
1358         INIT_LIST_HEAD(&dev->queued_bufs);
1359
1360         /* Init videobuf2 queue structure */
1361         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1362         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1363         dev->vb_queue.drv_priv = dev;
1364         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1365         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1366         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1367         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1368         ret = vb2_queue_init(&dev->vb_queue);
1369         if (ret) {
1370                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1371                 goto err_kfree;
1372         }
1373
1374         /* Register controls */
1375         switch (pdata->tuner) {
1376         case RTL2832_SDR_TUNER_E4000:
1377                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1378                 if (subdev)
1379                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1380                                               NULL, true);
1381                 break;
1382         case RTL2832_SDR_TUNER_R820T:
1383         case RTL2832_SDR_TUNER_R828D:
1384                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1385                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1386                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1387                                                         0, 1, 1, 1);
1388                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1389                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1390                                                    0, 8000000, 100000, 0);
1391                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1392                 break;
1393         case RTL2832_SDR_TUNER_FC0012:
1394         case RTL2832_SDR_TUNER_FC0013:
1395                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1396                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1397                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1398                                                         0, 1, 1, 1);
1399                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1400                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1401                                                    6000000, 8000000, 1000000,
1402                                                    6000000);
1403                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1404                 break;
1405         case RTL2832_SDR_TUNER_FC2580:
1406                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1407                 if (subdev)
1408                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1409                                               NULL, true);
1410                 break;
1411         default:
1412                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1413                 dev_err(&pdev->dev, "Unsupported tuner\n");
1414                 goto err_v4l2_ctrl_handler_free;
1415         }
1416         if (dev->hdl.error) {
1417                 ret = dev->hdl.error;
1418                 dev_err(&pdev->dev, "Could not initialize controls\n");
1419                 goto err_v4l2_ctrl_handler_free;
1420         }
1421
1422         /* Init video_device structure */
1423         dev->vdev = rtl2832_sdr_template;
1424         dev->vdev.queue = &dev->vb_queue;
1425         dev->vdev.queue->lock = &dev->vb_queue_lock;
1426         video_set_drvdata(&dev->vdev, dev);
1427
1428         /* Register the v4l2_device structure */
1429         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1430         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1431         if (ret) {
1432                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1433                 goto err_v4l2_ctrl_handler_free;
1434         }
1435
1436         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1437         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1438         dev->vdev.lock = &dev->v4l2_lock;
1439         dev->vdev.vfl_dir = VFL_DIR_RX;
1440
1441         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1442         if (ret) {
1443                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1444                         ret);
1445                 goto err_v4l2_device_unregister;
1446         }
1447         dev_info(&pdev->dev, "Registered as %s\n",
1448                  video_device_node_name(&dev->vdev));
1449         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1450         dev_notice(&pdev->dev,
1451                    "SDR API is still slightly experimental and functionality changes may follow\n");
1452         platform_set_drvdata(pdev, dev);
1453         return 0;
1454 err_v4l2_device_unregister:
1455         v4l2_device_unregister(&dev->v4l2_dev);
1456 err_v4l2_ctrl_handler_free:
1457         v4l2_ctrl_handler_free(&dev->hdl);
1458 err_kfree:
1459         kfree(dev);
1460 err_module_put:
1461         module_put(pdev->dev.parent->driver->owner);
1462 err:
1463         return ret;
1464 }
1465
1466 static int rtl2832_sdr_remove(struct platform_device *pdev)
1467 {
1468         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1469
1470         dev_dbg(&pdev->dev, "\n");
1471
1472         mutex_lock(&dev->vb_queue_lock);
1473         mutex_lock(&dev->v4l2_lock);
1474         /* No need to keep the urbs around after disconnection */
1475         dev->udev = NULL;
1476         v4l2_device_disconnect(&dev->v4l2_dev);
1477         video_unregister_device(&dev->vdev);
1478         mutex_unlock(&dev->v4l2_lock);
1479         mutex_unlock(&dev->vb_queue_lock);
1480         v4l2_device_put(&dev->v4l2_dev);
1481         module_put(pdev->dev.parent->driver->owner);
1482
1483         return 0;
1484 }
1485
1486 static struct platform_driver rtl2832_sdr_driver = {
1487         .driver = {
1488                 .name   = "rtl2832_sdr",
1489         },
1490         .probe          = rtl2832_sdr_probe,
1491         .remove         = rtl2832_sdr_remove,
1492 };
1493 module_platform_driver(rtl2832_sdr_driver);
1494
1495 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1496 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1497 MODULE_LICENSE("GPL");