drivers/media/dvb-frontends/rtl2832_sdr.c

   1 /*
   2  * Realtek RTL2832U SDR driver
   3  *
   4  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * GNU Radio plugin "gr-kernel" for device usage will be on:
  21  * http://git.linuxtv.org/anttip/gr-kernel.git
  22  *
  23  */
  24
  25 #include "rtl2832_sdr.h"
  26 #include "dvb_usb.h"
  27
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-ioctl.h>
  30 #include <media/v4l2-ctrls.h>
  31 #include <media/v4l2-event.h>
  32 #include <media/videobuf2-v4l2.h>
  33 #include <media/videobuf2-vmalloc.h>
  34
  35 #include <linux/platform_device.h>
  36 #include <linux/jiffies.h>
  37 #include <linux/math64.h>
  38 #include <linux/regmap.h>
  39
  40 static bool rtl2832_sdr_emulated_fmt;
  41 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
  42 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  43
  44 /* Original macro does not contain enough null pointer checks for our need */
  45 #define V4L2_SUBDEV_HAS_OP(sd, o, f) \
  46         ((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
  47
  48 #define MAX_BULK_BUFS            (10)
  49 #define BULK_BUFFER_SIZE         (128 * 512)
  50
  51 static const struct v4l2_frequency_band bands_adc[] = {
  52         {
  53                 .tuner = 0,
  54                 .type = V4L2_TUNER_ADC,
  55                 .index = 0,
  56                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  57                 .rangelow   =  300000,
  58                 .rangehigh  =  300000,
  59         },
  60         {
  61                 .tuner = 0,
  62                 .type = V4L2_TUNER_ADC,
  63                 .index = 1,
  64                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  65                 .rangelow   =  900001,
  66                 .rangehigh  = 2800000,
  67         },
  68         {
  69                 .tuner = 0,
  70                 .type = V4L2_TUNER_ADC,
  71                 .index = 2,
  72                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  73                 .rangelow   = 3200000,
  74                 .rangehigh  = 3200000,
  75         },
  76 };
  77
  78 static const struct v4l2_frequency_band bands_fm[] = {
  79         {
  80                 .tuner = 1,
  81                 .type = V4L2_TUNER_RF,
  82                 .index = 0,
  83                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  84                 .rangelow   =    50000000,
  85                 .rangehigh  =  2000000000,
  86         },
  87 };
  88
  89 /* stream formats */
  90 struct rtl2832_sdr_format {
  91         char    *name;
  92         u32     pixelformat;
  93         u32     buffersize;
  94 };
  95
  96 static struct rtl2832_sdr_format formats[] = {
  97         {
  98                 .name           = "Complex U8",
  99                 .pixelformat    = V4L2_SDR_FMT_CU8,
 100                 .buffersize     = BULK_BUFFER_SIZE,
 101         }, {
 102                 .name           = "Complex U16LE (emulated)",
 103                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
 104                 .buffersize     = BULK_BUFFER_SIZE * 2,
 105         },
 106 };
 107
 108 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
 109
 110 /* intermediate buffers with raw data from the USB device */
 111 struct rtl2832_sdr_frame_buf {
 112         /* common v4l buffer stuff -- must be first */
 113         struct vb2_v4l2_buffer vb;
 114         struct list_head list;
 115 };
 116
 117 struct rtl2832_sdr_dev {
 118 #define POWER_ON           0  /* BIT(0) */
 119 #define URB_BUF            1  /* BIT(1) */
 120         unsigned long flags;
 121
 122         struct platform_device *pdev;
 123         struct regmap *regmap;
 124
 125         struct video_device vdev;
 126         struct v4l2_device v4l2_dev;
 127         struct v4l2_subdev *v4l2_subdev;
 128
 129         /* videobuf2 queue and queued buffers list */
 130         struct vb2_queue vb_queue;
 131         struct list_head queued_bufs;
 132         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 133         unsigned sequence;           /* buffer sequence counter */
 134
 135         /* Note if taking both locks v4l2_lock must always be locked first! */
 136         struct mutex v4l2_lock;      /* Protects everything else */
 137         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 138
 139         /* Pointer to our usb_device, will be NULL after unplug */
 140         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 141
 142         unsigned int vb_full; /* vb is full and packets dropped */
 143
 144         struct urb     *urb_list[MAX_BULK_BUFS];
 145         int            buf_num;
 146         unsigned long  buf_size;
 147         u8             *buf_list[MAX_BULK_BUFS];
 148         dma_addr_t     dma_addr[MAX_BULK_BUFS];
 149         int urbs_initialized;
 150         int urbs_submitted;
 151
 152         unsigned int f_adc, f_tuner;
 153         u32 pixelformat;
 154         u32 buffersize;
 155         unsigned int num_formats;
 156
 157         /* Controls */
 158         struct v4l2_ctrl_handler hdl;
 159         struct v4l2_ctrl *bandwidth_auto;
 160         struct v4l2_ctrl *bandwidth;
 161
 162         /* for sample rate calc */
 163         unsigned int sample;
 164         unsigned int sample_measured;
 165         unsigned long jiffies_next;
 166 };
 167
 168 /* Private functions */
 169 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 170                 struct rtl2832_sdr_dev *dev)
 171 {
 172         unsigned long flags;
 173         struct rtl2832_sdr_frame_buf *buf = NULL;
 174
 175         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 176         if (list_empty(&dev->queued_bufs))
 177                 goto leave;
 178
 179         buf = list_entry(dev->queued_bufs.next,
 180                         struct rtl2832_sdr_frame_buf, list);
 181         list_del(&buf->list);
 182 leave:
 183         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 184         return buf;
 185 }
 186
 187 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 188                 void *dst, const u8 *src, unsigned int src_len)
 189 {
 190         struct platform_device *pdev = dev->pdev;
 191         unsigned int dst_len;
 192
 193         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 194                 /* native stream, no need to convert */
 195                 memcpy(dst, src, src_len);
 196                 dst_len = src_len;
 197         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 198                 /* convert u8 to u16 */
 199                 unsigned int i;
 200                 u16 *u16dst = dst;
 201
 202                 for (i = 0; i < src_len; i++)
 203                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
 204                 dst_len = 2 * src_len;
 205         } else {
 206                 dst_len = 0;
 207         }
 208
 209         /* calculate sample rate and output it in 10 seconds intervals */
 210         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 211                 #define MSECS 10000UL
 212                 unsigned int msecs = jiffies_to_msecs(jiffies -
 213                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 214                 unsigned int samples = dev->sample - dev->sample_measured;
 215
 216                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 217                 dev->sample_measured = dev->sample;
 218                 dev_dbg(&pdev->dev,
 219                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
 220                         src_len, samples, msecs, samples * 1000UL / msecs);
 221         }
 222
 223         /* total number of I+Q pairs */
 224         dev->sample += src_len / 2;
 225
 226         return dst_len;
 227 }
 228
 229 /*
 230  * This gets called for the bulk stream pipe. This is done in interrupt
 231  * time, so it has to be fast, not crash, and not stall. Neat.
 232  */
 233 static void rtl2832_sdr_urb_complete(struct urb *urb)
 234 {
 235         struct rtl2832_sdr_dev *dev = urb->context;
 236         struct platform_device *pdev = dev->pdev;
 237         struct rtl2832_sdr_frame_buf *fbuf;
 238
 239         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 240                             urb->status, urb->actual_length,
 241                             urb->transfer_buffer_length, urb->error_count);
 242
 243         switch (urb->status) {
 244         case 0:             /* success */
 245         case -ETIMEDOUT:    /* NAK */
 246                 break;
 247         case -ECONNRESET:   /* kill */
 248         case -ENOENT:
 249         case -ESHUTDOWN:
 250                 return;
 251         default:            /* error */
 252                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 253                 break;
 254         }
 255
 256         if (likely(urb->actual_length > 0)) {
 257                 void *ptr;
 258                 unsigned int len;
 259                 /* get free framebuffer */
 260                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 261                 if (unlikely(fbuf == NULL)) {
 262                         dev->vb_full++;
 263                         dev_notice_ratelimited(&pdev->dev,
 264                                                "videobuf is full, %d packets dropped\n",
 265                                                dev->vb_full);
 266                         goto skip;
 267                 }
 268
 269                 /* fill framebuffer */
 270                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 271                 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
 272                                 urb->actual_length);
 273                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
 274                 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 275                 fbuf->vb.sequence = dev->sequence++;
 276                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 277         }
 278 skip:
 279         usb_submit_urb(urb, GFP_ATOMIC);
 280 }
 281
 282 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
 283 {
 284         struct platform_device *pdev = dev->pdev;
 285         int i;
 286
 287         for (i = dev->urbs_submitted - 1; i >= 0; i--) {
 288                 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
 289                 /* stop the URB */
 290                 usb_kill_urb(dev->urb_list[i]);
 291         }
 292         dev->urbs_submitted = 0;
 293
 294         return 0;
 295 }
 296
 297 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
 298 {
 299         struct platform_device *pdev = dev->pdev;
 300         int i, ret;
 301
 302         for (i = 0; i < dev->urbs_initialized; i++) {
 303                 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
 304                 ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC);
 305                 if (ret) {
 306                         dev_err(&pdev->dev,
 307                                 "Could not submit urb no. %d - get them all back\n",
 308                                 i);
 309                         rtl2832_sdr_kill_urbs(dev);
 310                         return ret;
 311                 }
 312                 dev->urbs_submitted++;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
 319 {
 320         struct platform_device *pdev = dev->pdev;
 321
 322         if (test_bit(URB_BUF, &dev->flags)) {
 323                 while (dev->buf_num) {
 324                         dev->buf_num--;
 325                         dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
 326                         usb_free_coherent(dev->udev, dev->buf_size,
 327                                           dev->buf_list[dev->buf_num],
 328                                           dev->dma_addr[dev->buf_num]);
 329                 }
 330         }
 331         clear_bit(URB_BUF, &dev->flags);
 332
 333         return 0;
 334 }
 335
 336 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
 337 {
 338         struct platform_device *pdev = dev->pdev;
 339
 340         dev->buf_num = 0;
 341         dev->buf_size = BULK_BUFFER_SIZE;
 342
 343         dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
 344                 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
 345
 346         for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
 347                 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
 348                                 BULK_BUFFER_SIZE, GFP_ATOMIC,
 349                                 &dev->dma_addr[dev->buf_num]);
 350                 if (!dev->buf_list[dev->buf_num]) {
 351                         dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
 352                                 dev->buf_num);
 353                         rtl2832_sdr_free_stream_bufs(dev);
 354                         return -ENOMEM;
 355                 }
 356
 357                 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
 358                         dev->buf_num, dev->buf_list[dev->buf_num],
 359                         (long long)dev->dma_addr[dev->buf_num]);
 360                 set_bit(URB_BUF, &dev->flags);
 361         }
 362
 363         return 0;
 364 }
 365
 366 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
 367 {
 368         struct platform_device *pdev = dev->pdev;
 369         int i;
 370
 371         rtl2832_sdr_kill_urbs(dev);
 372
 373         for (i = dev->urbs_initialized - 1; i >= 0; i--) {
 374                 if (dev->urb_list[i]) {
 375                         dev_dbg(&pdev->dev, "free urb=%d\n", i);
 376                         /* free the URBs */
 377                         usb_free_urb(dev->urb_list[i]);
 378                 }
 379         }
 380         dev->urbs_initialized = 0;
 381
 382         return 0;
 383 }
 384
 385 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
 386 {
 387         struct platform_device *pdev = dev->pdev;
 388         int i, j;
 389
 390         /* allocate the URBs */
 391         for (i = 0; i < MAX_BULK_BUFS; i++) {
 392                 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
 393                 dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
 394                 if (!dev->urb_list[i]) {
 395                         dev_dbg(&pdev->dev, "failed\n");
 396                         for (j = 0; j < i; j++)
 397                                 usb_free_urb(dev->urb_list[j]);
 398                         return -ENOMEM;
 399                 }
 400                 usb_fill_bulk_urb(dev->urb_list[i],
 401                                 dev->udev,
 402                                 usb_rcvbulkpipe(dev->udev, 0x81),
 403                                 dev->buf_list[i],
 404                                 BULK_BUFFER_SIZE,
 405                                 rtl2832_sdr_urb_complete, dev);
 406
 407                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 408                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 409                 dev->urbs_initialized++;
 410         }
 411
 412         return 0;
 413 }
 414
 415 /* Must be called with vb_queue_lock hold */
 416 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 417 {
 418         struct platform_device *pdev = dev->pdev;
 419         unsigned long flags;
 420
 421         dev_dbg(&pdev->dev, "\n");
 422
 423         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 424         while (!list_empty(&dev->queued_bufs)) {
 425                 struct rtl2832_sdr_frame_buf *buf;
 426
 427                 buf = list_entry(dev->queued_bufs.next,
 428                                 struct rtl2832_sdr_frame_buf, list);
 429                 list_del(&buf->list);
 430                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 431         }
 432         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 433 }
 434
 435 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 436                 struct v4l2_capability *cap)
 437 {
 438         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 439         struct platform_device *pdev = dev->pdev;
 440
 441         dev_dbg(&pdev->dev, "\n");
 442
 443         strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 444         strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
 445         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 446         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
 447                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
 448         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 449         return 0;
 450 }
 451
 452 /* Videobuf2 operations */
 453 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 454                 unsigned int *nbuffers,
 455                 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 456 {
 457         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 458         struct platform_device *pdev = dev->pdev;
 459
 460         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 461
 462         /* Need at least 8 buffers */
 463         if (vq->num_buffers + *nbuffers < 8)
 464                 *nbuffers = 8 - vq->num_buffers;
 465         *nplanes = 1;
 466         sizes[0] = PAGE_ALIGN(dev->buffersize);
 467         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 468         return 0;
 469 }
 470
 471 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 472 {
 473         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 474
 475         /* Don't allow queing new buffers after device disconnection */
 476         if (!dev->udev)
 477                 return -ENODEV;
 478
 479         return 0;
 480 }
 481
 482 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 483 {
 484         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 485         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 486         struct rtl2832_sdr_frame_buf *buf =
 487                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 488         unsigned long flags;
 489
 490         /* Check the device has not disconnected between prep and queuing */
 491         if (!dev->udev) {
 492                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 493                 return;
 494         }
 495
 496         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 497         list_add_tail(&buf->list, &dev->queued_bufs);
 498         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 499 }
 500
 501 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 502 {
 503         struct platform_device *pdev = dev->pdev;
 504         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 505         struct dvb_frontend *fe = pdata->dvb_frontend;
 506         int ret;
 507         unsigned int f_sr, f_if;
 508         u8 buf[4], u8tmp1, u8tmp2;
 509         u64 u64tmp;
 510         u32 u32tmp;
 511
 512         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 513
 514         if (!test_bit(POWER_ON, &dev->flags))
 515                 return 0;
 516
 517         if (dev->f_adc == 0)
 518                 return 0;
 519
 520         f_sr = dev->f_adc;
 521
 522         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
 523         if (ret)
 524                 goto err;
 525
 526         ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
 527         if (ret)
 528                 goto err;
 529
 530         /* get IF from tuner */
 531         if (fe->ops.tuner_ops.get_if_frequency)
 532                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 533         else
 534                 ret = -EINVAL;
 535
 536         if (ret)
 537                 goto err;
 538
 539         /* program IF */
 540         u64tmp = f_if % pdata->clk;
 541         u64tmp *= 0x400000;
 542         u64tmp = div_u64(u64tmp, pdata->clk);
 543         u64tmp = -u64tmp;
 544         u32tmp = u64tmp & 0x3fffff;
 545
 546         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 547
 548         buf[0] = (u32tmp >> 16) & 0xff;
 549         buf[1] = (u32tmp >>  8) & 0xff;
 550         buf[2] = (u32tmp >>  0) & 0xff;
 551
 552         ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
 553         if (ret)
 554                 goto err;
 555
 556         /* BB / IF mode */
 557         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 558         if (f_if) {
 559                 u8tmp1 = 0x1a; /* disable Zero-IF */
 560                 u8tmp2 = 0x8d; /* enable ADC I */
 561         } else {
 562                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 563                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 564         }
 565
 566         ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
 567         if (ret)
 568                 goto err;
 569
 570         ret = regmap_write(dev->regmap, 0x008, u8tmp2);
 571         if (ret)
 572                 goto err;
 573
 574         ret = regmap_write(dev->regmap, 0x006, 0x80);
 575         if (ret)
 576                 goto err;
 577
 578         /* program sampling rate (resampling down) */
 579         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 580         u32tmp <<= 2;
 581         buf[0] = (u32tmp >> 24) & 0xff;
 582         buf[1] = (u32tmp >> 16) & 0xff;
 583         buf[2] = (u32tmp >>  8) & 0xff;
 584         buf[3] = (u32tmp >>  0) & 0xff;
 585         ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
 586         if (ret)
 587                 goto err;
 588
 589         /* low-pass filter */
 590         ret = regmap_bulk_write(dev->regmap, 0x11c,
 591                                 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 592                                 20);
 593         if (ret)
 594                 goto err;
 595
 596         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 597         if (ret)
 598                 goto err;
 599
 600         /* mode */
 601         ret = regmap_write(dev->regmap, 0x019, 0x05);
 602         if (ret)
 603                 goto err;
 604
 605         ret = regmap_bulk_write(dev->regmap, 0x01a,
 606                                 "\x1b\x16\x0d\x06\x01\xff", 6);
 607         if (ret)
 608                 goto err;
 609
 610         /* FSM */
 611         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
 612         if (ret)
 613                 goto err;
 614
 615         /* PID filter */
 616         ret = regmap_write(dev->regmap, 0x061, 0x60);
 617         if (ret)
 618                 goto err;
 619
 620         /* used RF tuner based settings */
 621         switch (pdata->tuner) {
 622         case RTL2832_SDR_TUNER_E4000:
 623                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 624                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 625                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 626                 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
 627                 ret = regmap_write(dev->regmap, 0x104, 0xd0);
 628                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 629                 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
 630                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 631                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 632                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 633                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 634                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 635                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 636                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 637                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 638                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 639                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 640                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 641                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 642                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 643                 ret = regmap_write(dev->regmap, 0x011, 0xd4);
 644                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 645                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 646                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 647                 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
 648                 ret = regmap_write(dev->regmap, 0x1de, 0xec);
 649                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 650                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 651                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 652                 ret = regmap_write(dev->regmap, 0x00d, 0x83);
 653                 ret = regmap_write(dev->regmap, 0x010, 0x49);
 654                 ret = regmap_write(dev->regmap, 0x00d, 0x87);
 655                 ret = regmap_write(dev->regmap, 0x00d, 0x85);
 656                 ret = regmap_write(dev->regmap, 0x013, 0x02);
 657                 break;
 658         case RTL2832_SDR_TUNER_FC0012:
 659         case RTL2832_SDR_TUNER_FC0013:
 660                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 661                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 662                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 663                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 664                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 665                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 666                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 667                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 668                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 669                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 670                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 671                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 672                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 673                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 674                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 675                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 676                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 677                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 678                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 679                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 680                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
 681                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 682                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 683                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 684                 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
 685                 ret = regmap_write(dev->regmap, 0x1de, 0xef);
 686                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 687                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 688                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 689                 break;
 690         case RTL2832_SDR_TUNER_R820T:
 691         case RTL2832_SDR_TUNER_R828D:
 692                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 693                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 694                 ret = regmap_write(dev->regmap, 0x115, 0x01);
 695                 ret = regmap_write(dev->regmap, 0x103, 0x80);
 696                 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
 697                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 698                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 699                 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
 700                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 701                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 702                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 703                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 704                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 705                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 706                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 707                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 708                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 709                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 710                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 711                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 712                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 713                 ret = regmap_write(dev->regmap, 0x011, 0xf4);
 714                 break;
 715         case RTL2832_SDR_TUNER_FC2580:
 716                 ret = regmap_write(dev->regmap, 0x112, 0x39);
 717                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 718                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 719                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 720                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 721                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 722                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 723                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 724                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 725                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 726                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 727                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 728                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 729                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 730                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 731                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 732                 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
 733                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 734                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 735                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 736                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
 737                 break;
 738         default:
 739                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 740         }
 741
 742         /* software reset */
 743         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
 744         if (ret)
 745                 goto err;
 746
 747         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
 748         if (ret)
 749                 goto err;
 750 err:
 751         return ret;
 752 };
 753
 754 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 755 {
 756         struct platform_device *pdev = dev->pdev;
 757         int ret;
 758
 759         dev_dbg(&pdev->dev, "\n");
 760
 761         /* PID filter */
 762         ret = regmap_write(dev->regmap, 0x061, 0xe0);
 763         if (ret)
 764                 goto err;
 765
 766         /* mode */
 767         ret = regmap_write(dev->regmap, 0x019, 0x20);
 768         if (ret)
 769                 goto err;
 770
 771         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 772         if (ret)
 773                 goto err;
 774
 775         /* FSM */
 776         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
 777         if (ret)
 778                 goto err;
 779
 780         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
 781         if (ret)
 782                 goto err;
 783
 784         ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
 785         if (ret)
 786                 goto err;
 787 err:
 788         return;
 789 };
 790
 791 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 792 {
 793         struct platform_device *pdev = dev->pdev;
 794         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 795         struct dvb_frontend *fe = pdata->dvb_frontend;
 796         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 797         struct v4l2_ctrl *bandwidth_auto;
 798         struct v4l2_ctrl *bandwidth;
 799
 800         /*
 801          * tuner RF (Hz)
 802          */
 803         if (dev->f_tuner == 0)
 804                 return 0;
 805
 806         /*
 807          * bandwidth (Hz)
 808          */
 809         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 810                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 811         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 812         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 813                 c->bandwidth_hz = dev->f_adc;
 814                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 815         } else {
 816                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 817         }
 818
 819         c->frequency = dev->f_tuner;
 820         c->delivery_system = SYS_DVBT;
 821
 822         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 823                 c->frequency, c->bandwidth_hz);
 824
 825         if (!test_bit(POWER_ON, &dev->flags))
 826                 return 0;
 827
 828         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 829                 if (fe->ops.tuner_ops.set_params)
 830                         fe->ops.tuner_ops.set_params(fe);
 831         }
 832
 833         return 0;
 834 };
 835
 836 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 837 {
 838         struct platform_device *pdev = dev->pdev;
 839         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 840         struct dvb_frontend *fe = pdata->dvb_frontend;
 841
 842         dev_dbg(&pdev->dev, "\n");
 843
 844         if (fe->ops.tuner_ops.init)
 845                 fe->ops.tuner_ops.init(fe);
 846
 847         return 0;
 848 };
 849
 850 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 851 {
 852         struct platform_device *pdev = dev->pdev;
 853         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 854         struct dvb_frontend *fe = pdata->dvb_frontend;
 855
 856         dev_dbg(&pdev->dev, "\n");
 857
 858         if (fe->ops.tuner_ops.sleep)
 859                 fe->ops.tuner_ops.sleep(fe);
 860
 861         return;
 862 };
 863
 864 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 865 {
 866         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 867         struct platform_device *pdev = dev->pdev;
 868         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 869         struct dvb_usb_device *d = pdata->dvb_usb_device;
 870         int ret;
 871
 872         dev_dbg(&pdev->dev, "\n");
 873
 874         if (!dev->udev)
 875                 return -ENODEV;
 876
 877         if (mutex_lock_interruptible(&dev->v4l2_lock))
 878                 return -ERESTARTSYS;
 879
 880         if (d->props->power_ctrl)
 881                 d->props->power_ctrl(d, 1);
 882
 883         /* enable ADC */
 884         if (d->props->frontend_ctrl)
 885                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 886
 887         set_bit(POWER_ON, &dev->flags);
 888
 889         /* wake-up tuner */
 890         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 891                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 892         else
 893                 ret = rtl2832_sdr_set_tuner(dev);
 894         if (ret)
 895                 goto err;
 896
 897         ret = rtl2832_sdr_set_tuner_freq(dev);
 898         if (ret)
 899                 goto err;
 900
 901         ret = rtl2832_sdr_set_adc(dev);
 902         if (ret)
 903                 goto err;
 904
 905         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 906         if (ret)
 907                 goto err;
 908
 909         ret = rtl2832_sdr_alloc_urbs(dev);
 910         if (ret)
 911                 goto err;
 912
 913         dev->sequence = 0;
 914
 915         ret = rtl2832_sdr_submit_urbs(dev);
 916         if (ret)
 917                 goto err;
 918
 919 err:
 920         mutex_unlock(&dev->v4l2_lock);
 921
 922         return ret;
 923 }
 924
 925 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 926 {
 927         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 928         struct platform_device *pdev = dev->pdev;
 929         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 930         struct dvb_usb_device *d = pdata->dvb_usb_device;
 931
 932         dev_dbg(&pdev->dev, "\n");
 933
 934         mutex_lock(&dev->v4l2_lock);
 935
 936         rtl2832_sdr_kill_urbs(dev);
 937         rtl2832_sdr_free_urbs(dev);
 938         rtl2832_sdr_free_stream_bufs(dev);
 939         rtl2832_sdr_cleanup_queued_bufs(dev);
 940         rtl2832_sdr_unset_adc(dev);
 941
 942         /* sleep tuner */
 943         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 944                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 945         else
 946                 rtl2832_sdr_unset_tuner(dev);
 947
 948         clear_bit(POWER_ON, &dev->flags);
 949
 950         /* disable ADC */
 951         if (d->props->frontend_ctrl)
 952                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 953
 954         if (d->props->power_ctrl)
 955                 d->props->power_ctrl(d, 0);
 956
 957         mutex_unlock(&dev->v4l2_lock);
 958 }
 959
 960 static struct vb2_ops rtl2832_sdr_vb2_ops = {
 961         .queue_setup            = rtl2832_sdr_queue_setup,
 962         .buf_prepare            = rtl2832_sdr_buf_prepare,
 963         .buf_queue              = rtl2832_sdr_buf_queue,
 964         .start_streaming        = rtl2832_sdr_start_streaming,
 965         .stop_streaming         = rtl2832_sdr_stop_streaming,
 966         .wait_prepare           = vb2_ops_wait_prepare,
 967         .wait_finish            = vb2_ops_wait_finish,
 968 };
 969
 970 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
 971                 struct v4l2_tuner *v)
 972 {
 973         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 974         struct platform_device *pdev = dev->pdev;
 975         int ret;
 976
 977         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
 978
 979         if (v->index == 0) {
 980                 strlcpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
 981                 v->type = V4L2_TUNER_ADC;
 982                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 983                 v->rangelow =   300000;
 984                 v->rangehigh = 3200000;
 985                 ret = 0;
 986         } else if (v->index == 1 &&
 987                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
 988                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
 989         } else if (v->index == 1) {
 990                 strlcpy(v->name, "RF: <unknown>", sizeof(v->name));
 991                 v->type = V4L2_TUNER_RF;
 992                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 993                 v->rangelow =    50000000;
 994                 v->rangehigh = 2000000000;
 995                 ret = 0;
 996         } else {
 997                 ret = -EINVAL;
 998         }
 999         return ret;
1000 }
1001
1002 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
1003                 const struct v4l2_tuner *v)
1004 {
1005         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1006         struct platform_device *pdev = dev->pdev;
1007         int ret;
1008
1009         dev_dbg(&pdev->dev, "\n");
1010
1011         if (v->index == 0) {
1012                 ret = 0;
1013         } else if (v->index == 1 &&
1014                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
1015                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
1016         } else if (v->index == 1) {
1017                 ret = 0;
1018         } else {
1019                 ret = -EINVAL;
1020         }
1021         return ret;
1022 }
1023
1024 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1025                 struct v4l2_frequency_band *band)
1026 {
1027         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1028         struct platform_device *pdev = dev->pdev;
1029         int ret;
1030
1031         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1032                 band->tuner, band->type, band->index);
1033
1034         if (band->tuner == 0) {
1035                 if (band->index >= ARRAY_SIZE(bands_adc))
1036                         return -EINVAL;
1037
1038                 *band = bands_adc[band->index];
1039                 ret = 0;
1040         } else if (band->tuner == 1 &&
1041                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1042                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1043         } else if (band->tuner == 1) {
1044                 if (band->index >= ARRAY_SIZE(bands_fm))
1045                         return -EINVAL;
1046
1047                 *band = bands_fm[band->index];
1048                 ret = 0;
1049         } else {
1050                 ret = -EINVAL;
1051         }
1052         return ret;
1053 }
1054
1055 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1056                 struct v4l2_frequency *f)
1057 {
1058         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1059         struct platform_device *pdev = dev->pdev;
1060         int ret;
1061
1062         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1063
1064         if (f->tuner == 0) {
1065                 f->frequency = dev->f_adc;
1066                 f->type = V4L2_TUNER_ADC;
1067                 ret = 0;
1068         } else if (f->tuner == 1 &&
1069                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1070                 f->type = V4L2_TUNER_RF;
1071                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1072         } else if (f->tuner == 1) {
1073                 f->frequency = dev->f_tuner;
1074                 f->type = V4L2_TUNER_RF;
1075                 ret = 0;
1076         } else {
1077                 ret = -EINVAL;
1078         }
1079         return ret;
1080 }
1081
1082 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1083                 const struct v4l2_frequency *f)
1084 {
1085         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1086         struct platform_device *pdev = dev->pdev;
1087         int ret, band;
1088
1089         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1090                 f->tuner, f->type, f->frequency);
1091
1092         /* ADC band midpoints */
1093         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1094         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1095
1096         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1097                 if (f->frequency < BAND_ADC_0)
1098                         band = 0;
1099                 else if (f->frequency < BAND_ADC_1)
1100                         band = 1;
1101                 else
1102                         band = 2;
1103
1104                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1105                                      bands_adc[band].rangelow,
1106                                      bands_adc[band].rangehigh);
1107
1108                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1109                 ret = rtl2832_sdr_set_adc(dev);
1110         } else if (f->tuner == 1 &&
1111                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1112                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1113         } else if (f->tuner == 1) {
1114                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1115                                 bands_fm[0].rangelow,
1116                                 bands_fm[0].rangehigh);
1117                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1118
1119                 ret = rtl2832_sdr_set_tuner_freq(dev);
1120         } else {
1121                 ret = -EINVAL;
1122         }
1123         return ret;
1124 }
1125
1126 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1127                 struct v4l2_fmtdesc *f)
1128 {
1129         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1130         struct platform_device *pdev = dev->pdev;
1131
1132         dev_dbg(&pdev->dev, "\n");
1133
1134         if (f->index >= dev->num_formats)
1135                 return -EINVAL;
1136
1137         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
1138         f->pixelformat = formats[f->index].pixelformat;
1139
1140         return 0;
1141 }
1142
1143 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1144                 struct v4l2_format *f)
1145 {
1146         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1147         struct platform_device *pdev = dev->pdev;
1148
1149         dev_dbg(&pdev->dev, "\n");
1150
1151         f->fmt.sdr.pixelformat = dev->pixelformat;
1152         f->fmt.sdr.buffersize = dev->buffersize;
1153
1154         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1155
1156         return 0;
1157 }
1158
1159 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1160                 struct v4l2_format *f)
1161 {
1162         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1163         struct platform_device *pdev = dev->pdev;
1164         struct vb2_queue *q = &dev->vb_queue;
1165         int i;
1166
1167         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1168                 (char *)&f->fmt.sdr.pixelformat);
1169
1170         if (vb2_is_busy(q))
1171                 return -EBUSY;
1172
1173         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1174         for (i = 0; i < dev->num_formats; i++) {
1175                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1176                         dev->pixelformat = formats[i].pixelformat;
1177                         dev->buffersize = formats[i].buffersize;
1178                         f->fmt.sdr.buffersize = formats[i].buffersize;
1179                         return 0;
1180                 }
1181         }
1182
1183         dev->pixelformat = formats[0].pixelformat;
1184         dev->buffersize = formats[0].buffersize;
1185         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1186         f->fmt.sdr.buffersize = formats[0].buffersize;
1187
1188         return 0;
1189 }
1190
1191 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1192                 struct v4l2_format *f)
1193 {
1194         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1195         struct platform_device *pdev = dev->pdev;
1196         int i;
1197
1198         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1199                 (char *)&f->fmt.sdr.pixelformat);
1200
1201         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1202         for (i = 0; i < dev->num_formats; i++) {
1203                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1204                         f->fmt.sdr.buffersize = formats[i].buffersize;
1205                         return 0;
1206                 }
1207         }
1208
1209         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1210         f->fmt.sdr.buffersize = formats[0].buffersize;
1211
1212         return 0;
1213 }
1214
1215 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1216         .vidioc_querycap          = rtl2832_sdr_querycap,
1217
1218         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1219         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1220         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1221         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1222
1223         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1224         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1225         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1226         .vidioc_querybuf          = vb2_ioctl_querybuf,
1227         .vidioc_qbuf              = vb2_ioctl_qbuf,
1228         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1229
1230         .vidioc_streamon          = vb2_ioctl_streamon,
1231         .vidioc_streamoff         = vb2_ioctl_streamoff,
1232
1233         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1234         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1235
1236         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1237         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1238         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1239
1240         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1241         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1242         .vidioc_log_status        = v4l2_ctrl_log_status,
1243 };
1244
1245 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1246         .owner                    = THIS_MODULE,
1247         .open                     = v4l2_fh_open,
1248         .release                  = vb2_fop_release,
1249         .read                     = vb2_fop_read,
1250         .poll                     = vb2_fop_poll,
1251         .mmap                     = vb2_fop_mmap,
1252         .unlocked_ioctl           = video_ioctl2,
1253 };
1254
1255 static struct video_device rtl2832_sdr_template = {
1256         .name                     = "Realtek RTL2832 SDR",
1257         .release                  = video_device_release_empty,
1258         .fops                     = &rtl2832_sdr_fops,
1259         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1260 };
1261
1262 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1263 {
1264         struct rtl2832_sdr_dev *dev =
1265                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1266                                         hdl);
1267         struct platform_device *pdev = dev->pdev;
1268         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1269         struct dvb_frontend *fe = pdata->dvb_frontend;
1270         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1271         int ret;
1272
1273         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1274                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1275                 ctrl->step);
1276
1277         switch (ctrl->id) {
1278         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1279         case V4L2_CID_RF_TUNER_BANDWIDTH:
1280                 /* TODO: these controls should be moved to tuner drivers */
1281                 if (dev->bandwidth_auto->val) {
1282                         /* Round towards the closest legal value */
1283                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1284                         u32 offset;
1285
1286                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1287                                       dev->bandwidth->maximum);
1288                         offset = val - dev->bandwidth->minimum;
1289                         offset = dev->bandwidth->step *
1290                                 div_u64(offset, dev->bandwidth->step);
1291                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1292                 }
1293                 c->bandwidth_hz = dev->bandwidth->val;
1294
1295                 if (!test_bit(POWER_ON, &dev->flags))
1296                         return 0;
1297
1298                 if (fe->ops.tuner_ops.set_params)
1299                         ret = fe->ops.tuner_ops.set_params(fe);
1300                 else
1301                         ret = 0;
1302                 break;
1303         default:
1304                 ret = -EINVAL;
1305         }
1306
1307         return ret;
1308 }
1309
1310 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1311         .s_ctrl = rtl2832_sdr_s_ctrl,
1312 };
1313
1314 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1315 {
1316         struct rtl2832_sdr_dev *dev =
1317                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1318         struct platform_device *pdev = dev->pdev;
1319
1320         dev_dbg(&pdev->dev, "\n");
1321
1322         v4l2_ctrl_handler_free(&dev->hdl);
1323         v4l2_device_unregister(&dev->v4l2_dev);
1324         kfree(dev);
1325 }
1326
1327 /* Platform driver interface */
1328 static int rtl2832_sdr_probe(struct platform_device *pdev)
1329 {
1330         struct rtl2832_sdr_dev *dev;
1331         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1332         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1333         struct v4l2_subdev *subdev;
1334         int ret;
1335
1336         dev_dbg(&pdev->dev, "\n");
1337
1338         if (!pdata) {
1339                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1340                 ret = -EINVAL;
1341                 goto err;
1342         }
1343         if (!pdev->dev.parent->driver) {
1344                 dev_dbg(&pdev->dev, "No parent device\n");
1345                 ret = -EINVAL;
1346                 goto err;
1347         }
1348         /* try to refcount host drv since we are the consumer */
1349         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1350                 dev_err(&pdev->dev, "Refcount fail");
1351                 ret = -EINVAL;
1352                 goto err;
1353         }
1354         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1355         if (dev == NULL) {
1356                 ret = -ENOMEM;
1357                 goto err_module_put;
1358         }
1359
1360         /* setup the state */
1361         subdev = pdata->v4l2_subdev;
1362         dev->v4l2_subdev = pdata->v4l2_subdev;
1363         dev->pdev = pdev;
1364         dev->regmap = pdata->regmap;
1365         dev->udev = pdata->dvb_usb_device->udev;
1366         dev->f_adc = bands_adc[0].rangelow;
1367         dev->f_tuner = bands_fm[0].rangelow;
1368         dev->pixelformat = formats[0].pixelformat;
1369         dev->buffersize = formats[0].buffersize;
1370         dev->num_formats = NUM_FORMATS;
1371         if (!rtl2832_sdr_emulated_fmt)
1372                 dev->num_formats -= 1;
1373
1374         mutex_init(&dev->v4l2_lock);
1375         mutex_init(&dev->vb_queue_lock);
1376         spin_lock_init(&dev->queued_bufs_lock);
1377         INIT_LIST_HEAD(&dev->queued_bufs);
1378
1379         /* Init videobuf2 queue structure */
1380         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1381         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1382         dev->vb_queue.drv_priv = dev;
1383         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1384         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1385         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1386         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1387         ret = vb2_queue_init(&dev->vb_queue);
1388         if (ret) {
1389                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1390                 goto err_kfree;
1391         }
1392
1393         /* Register controls */
1394         switch (pdata->tuner) {
1395         case RTL2832_SDR_TUNER_E4000:
1396                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1397                 if (subdev)
1398                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler, NULL);
1399                 break;
1400         case RTL2832_SDR_TUNER_R820T:
1401         case RTL2832_SDR_TUNER_R828D:
1402                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1403                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1404                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1405                                                         0, 1, 1, 1);
1406                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1407                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1408                                                    0, 8000000, 100000, 0);
1409                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1410                 break;
1411         case RTL2832_SDR_TUNER_FC0012:
1412         case RTL2832_SDR_TUNER_FC0013:
1413                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1414                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1415                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1416                                                         0, 1, 1, 1);
1417                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1418                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1419                                                    6000000, 8000000, 1000000,
1420                                                    6000000);
1421                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1422                 break;
1423         case RTL2832_SDR_TUNER_FC2580:
1424                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1425                 if (subdev)
1426                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1427                                               NULL);
1428                 break;
1429         default:
1430                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1431                 dev_err(&pdev->dev, "Unsupported tuner\n");
1432                 goto err_v4l2_ctrl_handler_free;
1433         }
1434         if (dev->hdl.error) {
1435                 ret = dev->hdl.error;
1436                 dev_err(&pdev->dev, "Could not initialize controls\n");
1437                 goto err_v4l2_ctrl_handler_free;
1438         }
1439
1440         /* Init video_device structure */
1441         dev->vdev = rtl2832_sdr_template;
1442         dev->vdev.queue = &dev->vb_queue;
1443         dev->vdev.queue->lock = &dev->vb_queue_lock;
1444         video_set_drvdata(&dev->vdev, dev);
1445
1446         /* Register the v4l2_device structure */
1447         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1448         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1449         if (ret) {
1450                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1451                 goto err_v4l2_ctrl_handler_free;
1452         }
1453
1454         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1455         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1456         dev->vdev.lock = &dev->v4l2_lock;
1457         dev->vdev.vfl_dir = VFL_DIR_RX;
1458
1459         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1460         if (ret) {
1461                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1462                         ret);
1463                 goto err_v4l2_device_unregister;
1464         }
1465         dev_info(&pdev->dev, "Registered as %s\n",
1466                  video_device_node_name(&dev->vdev));
1467         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1468         dev_notice(&pdev->dev,
1469                    "SDR API is still slightly experimental and functionality changes may follow\n");
1470         platform_set_drvdata(pdev, dev);
1471         return 0;
1472 err_v4l2_device_unregister:
1473         v4l2_device_unregister(&dev->v4l2_dev);
1474 err_v4l2_ctrl_handler_free:
1475         v4l2_ctrl_handler_free(&dev->hdl);
1476 err_kfree:
1477         kfree(dev);
1478 err_module_put:
1479         module_put(pdev->dev.parent->driver->owner);
1480 err:
1481         return ret;
1482 }
1483
1484 static int rtl2832_sdr_remove(struct platform_device *pdev)
1485 {
1486         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1487
1488         dev_dbg(&pdev->dev, "\n");
1489
1490         mutex_lock(&dev->vb_queue_lock);
1491         mutex_lock(&dev->v4l2_lock);
1492         /* No need to keep the urbs around after disconnection */
1493         dev->udev = NULL;
1494         v4l2_device_disconnect(&dev->v4l2_dev);
1495         video_unregister_device(&dev->vdev);
1496         mutex_unlock(&dev->v4l2_lock);
1497         mutex_unlock(&dev->vb_queue_lock);
1498         v4l2_device_put(&dev->v4l2_dev);
1499         module_put(pdev->dev.parent->driver->owner);
1500
1501         return 0;
1502 }
1503
1504 static struct platform_driver rtl2832_sdr_driver = {
1505         .driver = {
1506                 .name   = "rtl2832_sdr",
1507         },
1508         .probe          = rtl2832_sdr_probe,
1509         .remove         = rtl2832_sdr_remove,
1510 };
1511 module_platform_driver(rtl2832_sdr_driver);
1512
1513 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1514 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1515 MODULE_LICENSE("GPL");