drivers/media/dvb-frontends/rtl2832_sdr.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Realtek RTL2832U SDR driver
   4  *
   5  * Copyright (C) 2013 Antti Palosaari <[email protected]>
   6  *
   7  * GNU Radio plugin "gr-kernel" for device usage will be on:
   8  * https://git.linuxtv.org/anttip/gr-kernel.git
   9  */
  10
  11 #include "rtl2832_sdr.h"
  12 #include "dvb_usb.h"
  13
  14 #include <media/v4l2-device.h>
  15 #include <media/v4l2-ioctl.h>
  16 #include <media/v4l2-ctrls.h>
  17 #include <media/v4l2-event.h>
  18 #include <media/videobuf2-v4l2.h>
  19 #include <media/videobuf2-vmalloc.h>
  20
  21 #include <linux/platform_device.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/math64.h>
  24 #include <linux/regmap.h>
  25
  26 static bool rtl2832_sdr_emulated_fmt;
  27 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
  28 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  29
  30 /* Original macro does not contain enough null pointer checks for our need */
  31 #define V4L2_SUBDEV_HAS_OP(sd, o, f) \
  32         ((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
  33
  34 #define MAX_BULK_BUFS            (10)
  35 #define BULK_BUFFER_SIZE         (128 * 512)
  36
  37 static const struct v4l2_frequency_band bands_adc[] = {
  38         {
  39                 .tuner = 0,
  40                 .type = V4L2_TUNER_ADC,
  41                 .index = 0,
  42                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  43                 .rangelow   =  300000,
  44                 .rangehigh  =  300000,
  45         },
  46         {
  47                 .tuner = 0,
  48                 .type = V4L2_TUNER_ADC,
  49                 .index = 1,
  50                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  51                 .rangelow   =  900001,
  52                 .rangehigh  = 2800000,
  53         },
  54         {
  55                 .tuner = 0,
  56                 .type = V4L2_TUNER_ADC,
  57                 .index = 2,
  58                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  59                 .rangelow   = 3200000,
  60                 .rangehigh  = 3200000,
  61         },
  62 };
  63
  64 static const struct v4l2_frequency_band bands_fm[] = {
  65         {
  66                 .tuner = 1,
  67                 .type = V4L2_TUNER_RF,
  68                 .index = 0,
  69                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  70                 .rangelow   =    50000000,
  71                 .rangehigh  =  2000000000,
  72         },
  73 };
  74
  75 /* stream formats */
  76 struct rtl2832_sdr_format {
  77         char    *name;
  78         u32     pixelformat;
  79         u32     buffersize;
  80 };
  81
  82 static struct rtl2832_sdr_format formats[] = {
  83         {
  84                 .pixelformat    = V4L2_SDR_FMT_CU8,
  85                 .buffersize     = BULK_BUFFER_SIZE,
  86         }, {
  87                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
  88                 .buffersize     = BULK_BUFFER_SIZE * 2,
  89         },
  90 };
  91
  92 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  93
  94 /* intermediate buffers with raw data from the USB device */
  95 struct rtl2832_sdr_frame_buf {
  96         /* common v4l buffer stuff -- must be first */
  97         struct vb2_v4l2_buffer vb;
  98         struct list_head list;
  99 };
 100
 101 struct rtl2832_sdr_dev {
 102 #define POWER_ON           0  /* BIT(0) */
 103 #define URB_BUF            1  /* BIT(1) */
 104         unsigned long flags;
 105
 106         struct platform_device *pdev;
 107         struct regmap *regmap;
 108
 109         struct video_device vdev;
 110         struct v4l2_device v4l2_dev;
 111         struct v4l2_subdev *v4l2_subdev;
 112
 113         /* videobuf2 queue and queued buffers list */
 114         struct vb2_queue vb_queue;
 115         struct list_head queued_bufs;
 116         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 117         unsigned sequence;           /* buffer sequence counter */
 118
 119         /* Note if taking both locks v4l2_lock must always be locked first! */
 120         struct mutex v4l2_lock;      /* Protects everything else */
 121         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 122
 123         /* Pointer to our usb_device, will be NULL after unplug */
 124         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 125
 126         unsigned int vb_full; /* vb is full and packets dropped */
 127
 128         struct urb     *urb_list[MAX_BULK_BUFS];
 129         int            buf_num;
 130         unsigned long  buf_size;
 131         u8             *buf_list[MAX_BULK_BUFS];
 132         dma_addr_t     dma_addr[MAX_BULK_BUFS];
 133         int urbs_initialized;
 134         int urbs_submitted;
 135
 136         unsigned int f_adc, f_tuner;
 137         u32 pixelformat;
 138         u32 buffersize;
 139         unsigned int num_formats;
 140
 141         /* Controls */
 142         struct v4l2_ctrl_handler hdl;
 143         struct v4l2_ctrl *bandwidth_auto;
 144         struct v4l2_ctrl *bandwidth;
 145
 146         /* for sample rate calc */
 147         unsigned int sample;
 148         unsigned int sample_measured;
 149         unsigned long jiffies_next;
 150 };
 151
 152 /* Private functions */
 153 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 154                 struct rtl2832_sdr_dev *dev)
 155 {
 156         unsigned long flags;
 157         struct rtl2832_sdr_frame_buf *buf = NULL;
 158
 159         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 160         if (list_empty(&dev->queued_bufs))
 161                 goto leave;
 162
 163         buf = list_entry(dev->queued_bufs.next,
 164                         struct rtl2832_sdr_frame_buf, list);
 165         list_del(&buf->list);
 166 leave:
 167         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 168         return buf;
 169 }
 170
 171 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 172                 void *dst, const u8 *src, unsigned int src_len)
 173 {
 174         struct platform_device *pdev = dev->pdev;
 175         unsigned int dst_len;
 176
 177         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 178                 /* native stream, no need to convert */
 179                 memcpy(dst, src, src_len);
 180                 dst_len = src_len;
 181         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 182                 /* convert u8 to u16 */
 183                 unsigned int i;
 184                 u16 *u16dst = dst;
 185
 186                 for (i = 0; i < src_len; i++)
 187                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
 188                 dst_len = 2 * src_len;
 189         } else {
 190                 dst_len = 0;
 191         }
 192
 193         /* calculate sample rate and output it in 10 seconds intervals */
 194         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 195                 #define MSECS 10000UL
 196                 unsigned int msecs = jiffies_to_msecs(jiffies -
 197                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 198                 unsigned int samples = dev->sample - dev->sample_measured;
 199
 200                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 201                 dev->sample_measured = dev->sample;
 202                 dev_dbg(&pdev->dev,
 203                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
 204                         src_len, samples, msecs, samples * 1000UL / msecs);
 205         }
 206
 207         /* total number of I+Q pairs */
 208         dev->sample += src_len / 2;
 209
 210         return dst_len;
 211 }
 212
 213 /*
 214  * This gets called for the bulk stream pipe. This is done in interrupt
 215  * time, so it has to be fast, not crash, and not stall. Neat.
 216  */
 217 static void rtl2832_sdr_urb_complete(struct urb *urb)
 218 {
 219         struct rtl2832_sdr_dev *dev = urb->context;
 220         struct platform_device *pdev = dev->pdev;
 221         struct rtl2832_sdr_frame_buf *fbuf;
 222
 223         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 224                             urb->status, urb->actual_length,
 225                             urb->transfer_buffer_length, urb->error_count);
 226
 227         switch (urb->status) {
 228         case 0:             /* success */
 229         case -ETIMEDOUT:    /* NAK */
 230                 break;
 231         case -ECONNRESET:   /* kill */
 232         case -ENOENT:
 233         case -ESHUTDOWN:
 234                 return;
 235         default:            /* error */
 236                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 237                 break;
 238         }
 239
 240         if (likely(urb->actual_length > 0)) {
 241                 void *ptr;
 242                 unsigned int len;
 243                 /* get free framebuffer */
 244                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 245                 if (unlikely(fbuf == NULL)) {
 246                         dev->vb_full++;
 247                         dev_notice_ratelimited(&pdev->dev,
 248                                                "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                                 dev->urb_list[j] = NULL;
 382                         }
 383                         dev->urbs_initialized = 0;
 384                         return -ENOMEM;
 385                 }
 386                 usb_fill_bulk_urb(dev->urb_list[i],
 387                                 dev->udev,
 388                                 usb_rcvbulkpipe(dev->udev, 0x81),
 389                                 dev->buf_list[i],
 390                                 BULK_BUFFER_SIZE,
 391                                 rtl2832_sdr_urb_complete, dev);
 392
 393                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 394                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 395                 dev->urbs_initialized++;
 396         }
 397
 398         return 0;
 399 }
 400
 401 /* Must be called with vb_queue_lock hold */
 402 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 403 {
 404         struct platform_device *pdev = dev->pdev;
 405         unsigned long flags;
 406
 407         dev_dbg(&pdev->dev, "\n");
 408
 409         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 410         while (!list_empty(&dev->queued_bufs)) {
 411                 struct rtl2832_sdr_frame_buf *buf;
 412
 413                 buf = list_entry(dev->queued_bufs.next,
 414                                 struct rtl2832_sdr_frame_buf, list);
 415                 list_del(&buf->list);
 416                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 417         }
 418         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 419 }
 420
 421 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 422                 struct v4l2_capability *cap)
 423 {
 424         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 425         struct platform_device *pdev = dev->pdev;
 426
 427         dev_dbg(&pdev->dev, "\n");
 428
 429         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 430         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 431         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 432         return 0;
 433 }
 434
 435 /* Videobuf2 operations */
 436 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 437                 unsigned int *nbuffers,
 438                 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
 439 {
 440         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 441         struct platform_device *pdev = dev->pdev;
 442
 443         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 444
 445         /* Need at least 8 buffers */
 446         if (vq->num_buffers + *nbuffers < 8)
 447                 *nbuffers = 8 - vq->num_buffers;
 448         *nplanes = 1;
 449         sizes[0] = PAGE_ALIGN(dev->buffersize);
 450         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 451         return 0;
 452 }
 453
 454 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 455 {
 456         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 457
 458         /* Don't allow queueing new buffers after device disconnection */
 459         if (!dev->udev)
 460                 return -ENODEV;
 461
 462         return 0;
 463 }
 464
 465 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 466 {
 467         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 468         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 469         struct rtl2832_sdr_frame_buf *buf =
 470                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 471         unsigned long flags;
 472
 473         /* Check the device has not disconnected between prep and queuing */
 474         if (!dev->udev) {
 475                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 476                 return;
 477         }
 478
 479         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 480         list_add_tail(&buf->list, &dev->queued_bufs);
 481         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 482 }
 483
 484 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 485 {
 486         struct platform_device *pdev = dev->pdev;
 487         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 488         struct dvb_frontend *fe = pdata->dvb_frontend;
 489         int ret;
 490         unsigned int f_sr, f_if;
 491         u8 buf[4], u8tmp1, u8tmp2;
 492         u64 u64tmp;
 493         u32 u32tmp;
 494
 495         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 496
 497         if (!test_bit(POWER_ON, &dev->flags))
 498                 return 0;
 499
 500         if (dev->f_adc == 0)
 501                 return 0;
 502
 503         f_sr = dev->f_adc;
 504
 505         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
 506         if (ret)
 507                 goto err;
 508
 509         ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
 510         if (ret)
 511                 goto err;
 512
 513         /* get IF from tuner */
 514         if (fe->ops.tuner_ops.get_if_frequency)
 515                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 516         else
 517                 ret = -EINVAL;
 518
 519         if (ret)
 520                 goto err;
 521
 522         /* program IF */
 523         u64tmp = f_if % pdata->clk;
 524         u64tmp *= 0x400000;
 525         u64tmp = div_u64(u64tmp, pdata->clk);
 526         u64tmp = -u64tmp;
 527         u32tmp = u64tmp & 0x3fffff;
 528
 529         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 530
 531         buf[0] = (u32tmp >> 16) & 0xff;
 532         buf[1] = (u32tmp >>  8) & 0xff;
 533         buf[2] = (u32tmp >>  0) & 0xff;
 534
 535         ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
 536         if (ret)
 537                 goto err;
 538
 539         /* BB / IF mode */
 540         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 541         if (f_if) {
 542                 u8tmp1 = 0x1a; /* disable Zero-IF */
 543                 u8tmp2 = 0x8d; /* enable ADC I */
 544         } else {
 545                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 546                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 547         }
 548
 549         ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
 550         if (ret)
 551                 goto err;
 552
 553         ret = regmap_write(dev->regmap, 0x008, u8tmp2);
 554         if (ret)
 555                 goto err;
 556
 557         ret = regmap_write(dev->regmap, 0x006, 0x80);
 558         if (ret)
 559                 goto err;
 560
 561         /* program sampling rate (resampling down) */
 562         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 563         u32tmp <<= 2;
 564         buf[0] = (u32tmp >> 24) & 0xff;
 565         buf[1] = (u32tmp >> 16) & 0xff;
 566         buf[2] = (u32tmp >>  8) & 0xff;
 567         buf[3] = (u32tmp >>  0) & 0xff;
 568         ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
 569         if (ret)
 570                 goto err;
 571
 572         /* low-pass filter */
 573         ret = regmap_bulk_write(dev->regmap, 0x11c,
 574                                 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 575                                 20);
 576         if (ret)
 577                 goto err;
 578
 579         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 580         if (ret)
 581                 goto err;
 582
 583         /* mode */
 584         ret = regmap_write(dev->regmap, 0x019, 0x05);
 585         if (ret)
 586                 goto err;
 587
 588         ret = regmap_bulk_write(dev->regmap, 0x01a,
 589                                 "\x1b\x16\x0d\x06\x01\xff", 6);
 590         if (ret)
 591                 goto err;
 592
 593         /* FSM */
 594         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
 595         if (ret)
 596                 goto err;
 597
 598         /* PID filter */
 599         ret = regmap_write(dev->regmap, 0x061, 0x60);
 600         if (ret)
 601                 goto err;
 602
 603         /* used RF tuner based settings */
 604         switch (pdata->tuner) {
 605         case RTL2832_SDR_TUNER_E4000:
 606                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 607                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 608                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 609                 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
 610                 ret = regmap_write(dev->regmap, 0x104, 0xd0);
 611                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 612                 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
 613                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 614                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 615                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 616                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 617                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 618                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 619                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 620                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 621                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 622                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 623                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 624                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 625                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 626                 ret = regmap_write(dev->regmap, 0x011, 0xd4);
 627                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 628                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 629                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 630                 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
 631                 ret = regmap_write(dev->regmap, 0x1de, 0xec);
 632                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 633                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 634                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 635                 ret = regmap_write(dev->regmap, 0x00d, 0x83);
 636                 ret = regmap_write(dev->regmap, 0x010, 0x49);
 637                 ret = regmap_write(dev->regmap, 0x00d, 0x87);
 638                 ret = regmap_write(dev->regmap, 0x00d, 0x85);
 639                 ret = regmap_write(dev->regmap, 0x013, 0x02);
 640                 break;
 641         case RTL2832_SDR_TUNER_FC0012:
 642         case RTL2832_SDR_TUNER_FC0013:
 643                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 644                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 645                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 646                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 647                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 648                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 649                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 650                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 651                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 652                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 653                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 654                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 655                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 656                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 657                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 658                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 659                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 660                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 661                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 662                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 663                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
 664                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 665                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 666                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
 667                 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
 668                 ret = regmap_write(dev->regmap, 0x1de, 0xef);
 669                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 670                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 671                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 672                 break;
 673         case RTL2832_SDR_TUNER_R820T:
 674         case RTL2832_SDR_TUNER_R828D:
 675                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
 676                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 677                 ret = regmap_write(dev->regmap, 0x115, 0x01);
 678                 ret = regmap_write(dev->regmap, 0x103, 0x80);
 679                 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
 680                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 681                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 682                 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
 683                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 684                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 685                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 686                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 687                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 688                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 689                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 690                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 691                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 692                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
 693                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 694                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 695                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 696                 ret = regmap_write(dev->regmap, 0x011, 0xf4);
 697                 break;
 698         case RTL2832_SDR_TUNER_FC2580:
 699                 ret = regmap_write(dev->regmap, 0x112, 0x39);
 700                 ret = regmap_write(dev->regmap, 0x102, 0x40);
 701                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
 702                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 703                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
 704                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
 705                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 706                 ret = regmap_write(dev->regmap, 0x106, 0x35);
 707                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 708                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 709                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 710                 ret = regmap_write(dev->regmap, 0x107, 0x40);
 711                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 712                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 713                 ret = regmap_write(dev->regmap, 0x108, 0x80);
 714                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
 715                 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
 716                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 717                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 718                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 719                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
 720                 break;
 721         default:
 722                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 723         }
 724
 725         /* software reset */
 726         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
 727         if (ret)
 728                 goto err;
 729
 730         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
 731         if (ret)
 732                 goto err;
 733 err:
 734         return ret;
 735 };
 736
 737 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 738 {
 739         struct platform_device *pdev = dev->pdev;
 740         int ret;
 741
 742         dev_dbg(&pdev->dev, "\n");
 743
 744         /* PID filter */
 745         ret = regmap_write(dev->regmap, 0x061, 0xe0);
 746         if (ret)
 747                 goto err;
 748
 749         /* mode */
 750         ret = regmap_write(dev->regmap, 0x019, 0x20);
 751         if (ret)
 752                 goto err;
 753
 754         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 755         if (ret)
 756                 goto err;
 757
 758         /* FSM */
 759         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
 760         if (ret)
 761                 goto err;
 762
 763         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
 764         if (ret)
 765                 goto err;
 766
 767         ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
 768         if (ret)
 769                 goto err;
 770 err:
 771         return;
 772 };
 773
 774 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 775 {
 776         struct platform_device *pdev = dev->pdev;
 777         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 778         struct dvb_frontend *fe = pdata->dvb_frontend;
 779         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 780         struct v4l2_ctrl *bandwidth_auto;
 781         struct v4l2_ctrl *bandwidth;
 782
 783         /*
 784          * tuner RF (Hz)
 785          */
 786         if (dev->f_tuner == 0)
 787                 return 0;
 788
 789         /*
 790          * bandwidth (Hz)
 791          */
 792         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 793                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 794         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 795         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 796                 c->bandwidth_hz = dev->f_adc;
 797                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 798         } else {
 799                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 800         }
 801
 802         c->frequency = dev->f_tuner;
 803         c->delivery_system = SYS_DVBT;
 804
 805         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 806                 c->frequency, c->bandwidth_hz);
 807
 808         if (!test_bit(POWER_ON, &dev->flags))
 809                 return 0;
 810
 811         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 812                 if (fe->ops.tuner_ops.set_params)
 813                         fe->ops.tuner_ops.set_params(fe);
 814         }
 815
 816         return 0;
 817 };
 818
 819 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 820 {
 821         struct platform_device *pdev = dev->pdev;
 822         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 823         struct dvb_frontend *fe = pdata->dvb_frontend;
 824
 825         dev_dbg(&pdev->dev, "\n");
 826
 827         if (fe->ops.tuner_ops.init)
 828                 fe->ops.tuner_ops.init(fe);
 829
 830         return 0;
 831 };
 832
 833 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 834 {
 835         struct platform_device *pdev = dev->pdev;
 836         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 837         struct dvb_frontend *fe = pdata->dvb_frontend;
 838
 839         dev_dbg(&pdev->dev, "\n");
 840
 841         if (fe->ops.tuner_ops.sleep)
 842                 fe->ops.tuner_ops.sleep(fe);
 843
 844         return;
 845 };
 846
 847 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 848 {
 849         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 850         struct platform_device *pdev = dev->pdev;
 851         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 852         struct dvb_usb_device *d = pdata->dvb_usb_device;
 853         int ret;
 854
 855         dev_dbg(&pdev->dev, "\n");
 856
 857         if (!dev->udev)
 858                 return -ENODEV;
 859
 860         if (mutex_lock_interruptible(&dev->v4l2_lock))
 861                 return -ERESTARTSYS;
 862
 863         if (d->props->power_ctrl)
 864                 d->props->power_ctrl(d, 1);
 865
 866         /* enable ADC */
 867         if (d->props->frontend_ctrl)
 868                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 869
 870         set_bit(POWER_ON, &dev->flags);
 871
 872         /* wake-up tuner */
 873         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 874                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 875         else
 876                 ret = rtl2832_sdr_set_tuner(dev);
 877         if (ret)
 878                 goto err;
 879
 880         ret = rtl2832_sdr_set_tuner_freq(dev);
 881         if (ret)
 882                 goto err;
 883
 884         ret = rtl2832_sdr_set_adc(dev);
 885         if (ret)
 886                 goto err;
 887
 888         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 889         if (ret)
 890                 goto err;
 891
 892         ret = rtl2832_sdr_alloc_urbs(dev);
 893         if (ret)
 894                 goto err;
 895
 896         dev->sequence = 0;
 897
 898         ret = rtl2832_sdr_submit_urbs(dev);
 899         if (ret)
 900                 goto err;
 901
 902 err:
 903         mutex_unlock(&dev->v4l2_lock);
 904
 905         return ret;
 906 }
 907
 908 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 909 {
 910         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 911         struct platform_device *pdev = dev->pdev;
 912         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 913         struct dvb_usb_device *d = pdata->dvb_usb_device;
 914
 915         dev_dbg(&pdev->dev, "\n");
 916
 917         mutex_lock(&dev->v4l2_lock);
 918
 919         rtl2832_sdr_kill_urbs(dev);
 920         rtl2832_sdr_free_urbs(dev);
 921         rtl2832_sdr_free_stream_bufs(dev);
 922         rtl2832_sdr_cleanup_queued_bufs(dev);
 923         rtl2832_sdr_unset_adc(dev);
 924
 925         /* sleep tuner */
 926         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 927                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 928         else
 929                 rtl2832_sdr_unset_tuner(dev);
 930
 931         clear_bit(POWER_ON, &dev->flags);
 932
 933         /* disable ADC */
 934         if (d->props->frontend_ctrl)
 935                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 936
 937         if (d->props->power_ctrl)
 938                 d->props->power_ctrl(d, 0);
 939
 940         mutex_unlock(&dev->v4l2_lock);
 941 }
 942
 943 static const struct vb2_ops rtl2832_sdr_vb2_ops = {
 944         .queue_setup            = rtl2832_sdr_queue_setup,
 945         .buf_prepare            = rtl2832_sdr_buf_prepare,
 946         .buf_queue              = rtl2832_sdr_buf_queue,
 947         .start_streaming        = rtl2832_sdr_start_streaming,
 948         .stop_streaming         = rtl2832_sdr_stop_streaming,
 949         .wait_prepare           = vb2_ops_wait_prepare,
 950         .wait_finish            = vb2_ops_wait_finish,
 951 };
 952
 953 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
 954                 struct v4l2_tuner *v)
 955 {
 956         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 957         struct platform_device *pdev = dev->pdev;
 958         int ret;
 959
 960         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
 961
 962         if (v->index == 0) {
 963                 strscpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
 964                 v->type = V4L2_TUNER_ADC;
 965                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 966                 v->rangelow =   300000;
 967                 v->rangehigh = 3200000;
 968                 ret = 0;
 969         } else if (v->index == 1 &&
 970                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
 971                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
 972         } else if (v->index == 1) {
 973                 strscpy(v->name, "RF: <unknown>", sizeof(v->name));
 974                 v->type = V4L2_TUNER_RF;
 975                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 976                 v->rangelow =    50000000;
 977                 v->rangehigh = 2000000000;
 978                 ret = 0;
 979         } else {
 980                 ret = -EINVAL;
 981         }
 982         return ret;
 983 }
 984
 985 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
 986                 const struct v4l2_tuner *v)
 987 {
 988         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 989         struct platform_device *pdev = dev->pdev;
 990         int ret;
 991
 992         dev_dbg(&pdev->dev, "\n");
 993
 994         if (v->index == 0) {
 995                 ret = 0;
 996         } else if (v->index == 1 &&
 997                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
 998                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 999         } else if (v->index == 1) {
1000                 ret = 0;
1001         } else {
1002                 ret = -EINVAL;
1003         }
1004         return ret;
1005 }
1006
1007 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1008                 struct v4l2_frequency_band *band)
1009 {
1010         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1011         struct platform_device *pdev = dev->pdev;
1012         int ret;
1013
1014         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1015                 band->tuner, band->type, band->index);
1016
1017         if (band->tuner == 0) {
1018                 if (band->index >= ARRAY_SIZE(bands_adc))
1019                         return -EINVAL;
1020
1021                 *band = bands_adc[band->index];
1022                 ret = 0;
1023         } else if (band->tuner == 1 &&
1024                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1025                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1026         } else if (band->tuner == 1) {
1027                 if (band->index >= ARRAY_SIZE(bands_fm))
1028                         return -EINVAL;
1029
1030                 *band = bands_fm[band->index];
1031                 ret = 0;
1032         } else {
1033                 ret = -EINVAL;
1034         }
1035         return ret;
1036 }
1037
1038 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1039                 struct v4l2_frequency *f)
1040 {
1041         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1042         struct platform_device *pdev = dev->pdev;
1043         int ret;
1044
1045         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1046
1047         if (f->tuner == 0) {
1048                 f->frequency = dev->f_adc;
1049                 f->type = V4L2_TUNER_ADC;
1050                 ret = 0;
1051         } else if (f->tuner == 1 &&
1052                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1053                 f->type = V4L2_TUNER_RF;
1054                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1055         } else if (f->tuner == 1) {
1056                 f->frequency = dev->f_tuner;
1057                 f->type = V4L2_TUNER_RF;
1058                 ret = 0;
1059         } else {
1060                 ret = -EINVAL;
1061         }
1062         return ret;
1063 }
1064
1065 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1066                 const struct v4l2_frequency *f)
1067 {
1068         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1069         struct platform_device *pdev = dev->pdev;
1070         int ret, band;
1071
1072         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1073                 f->tuner, f->type, f->frequency);
1074
1075         /* ADC band midpoints */
1076         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1077         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1078
1079         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1080                 if (f->frequency < BAND_ADC_0)
1081                         band = 0;
1082                 else if (f->frequency < BAND_ADC_1)
1083                         band = 1;
1084                 else
1085                         band = 2;
1086
1087                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1088                                      bands_adc[band].rangelow,
1089                                      bands_adc[band].rangehigh);
1090
1091                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1092                 ret = rtl2832_sdr_set_adc(dev);
1093         } else if (f->tuner == 1 &&
1094                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1095                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1096         } else if (f->tuner == 1) {
1097                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1098                                 bands_fm[0].rangelow,
1099                                 bands_fm[0].rangehigh);
1100                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1101
1102                 ret = rtl2832_sdr_set_tuner_freq(dev);
1103         } else {
1104                 ret = -EINVAL;
1105         }
1106         return ret;
1107 }
1108
1109 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1110                 struct v4l2_fmtdesc *f)
1111 {
1112         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1113         struct platform_device *pdev = dev->pdev;
1114
1115         dev_dbg(&pdev->dev, "\n");
1116
1117         if (f->index >= dev->num_formats)
1118                 return -EINVAL;
1119
1120         f->pixelformat = formats[f->index].pixelformat;
1121
1122         return 0;
1123 }
1124
1125 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1126                 struct v4l2_format *f)
1127 {
1128         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1129         struct platform_device *pdev = dev->pdev;
1130
1131         dev_dbg(&pdev->dev, "\n");
1132
1133         f->fmt.sdr.pixelformat = dev->pixelformat;
1134         f->fmt.sdr.buffersize = dev->buffersize;
1135
1136         return 0;
1137 }
1138
1139 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1140                 struct v4l2_format *f)
1141 {
1142         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1143         struct platform_device *pdev = dev->pdev;
1144         struct vb2_queue *q = &dev->vb_queue;
1145         int i;
1146
1147         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1148                 (char *)&f->fmt.sdr.pixelformat);
1149
1150         if (vb2_is_busy(q))
1151                 return -EBUSY;
1152
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         for (i = 0; i < dev->num_formats; i++) {
1181                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1182                         f->fmt.sdr.buffersize = formats[i].buffersize;
1183                         return 0;
1184                 }
1185         }
1186
1187         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1188         f->fmt.sdr.buffersize = formats[0].buffersize;
1189
1190         return 0;
1191 }
1192
1193 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1194         .vidioc_querycap          = rtl2832_sdr_querycap,
1195
1196         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1197         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1198         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1199         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1200
1201         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1202         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1203         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1204         .vidioc_querybuf          = vb2_ioctl_querybuf,
1205         .vidioc_qbuf              = vb2_ioctl_qbuf,
1206         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1207
1208         .vidioc_streamon          = vb2_ioctl_streamon,
1209         .vidioc_streamoff         = vb2_ioctl_streamoff,
1210
1211         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1212         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1213
1214         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1215         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1216         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1217
1218         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1219         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1220         .vidioc_log_status        = v4l2_ctrl_log_status,
1221 };
1222
1223 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1224         .owner                    = THIS_MODULE,
1225         .open                     = v4l2_fh_open,
1226         .release                  = vb2_fop_release,
1227         .read                     = vb2_fop_read,
1228         .poll                     = vb2_fop_poll,
1229         .mmap                     = vb2_fop_mmap,
1230         .unlocked_ioctl           = video_ioctl2,
1231 };
1232
1233 static struct video_device rtl2832_sdr_template = {
1234         .name                     = "Realtek RTL2832 SDR",
1235         .release                  = video_device_release_empty,
1236         .fops                     = &rtl2832_sdr_fops,
1237         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1238         .device_caps              = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1239                                     V4L2_CAP_READWRITE | V4L2_CAP_TUNER,
1240 };
1241
1242 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1243 {
1244         struct rtl2832_sdr_dev *dev =
1245                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1246                                         hdl);
1247         struct platform_device *pdev = dev->pdev;
1248         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1249         struct dvb_frontend *fe = pdata->dvb_frontend;
1250         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1251         int ret;
1252
1253         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1254                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1255                 ctrl->step);
1256
1257         switch (ctrl->id) {
1258         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1259         case V4L2_CID_RF_TUNER_BANDWIDTH:
1260                 /* TODO: these controls should be moved to tuner drivers */
1261                 if (dev->bandwidth_auto->val) {
1262                         /* Round towards the closest legal value */
1263                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1264                         u32 offset;
1265
1266                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1267                                       dev->bandwidth->maximum);
1268                         offset = val - dev->bandwidth->minimum;
1269                         offset = dev->bandwidth->step *
1270                                 div_u64(offset, dev->bandwidth->step);
1271                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1272                 }
1273                 c->bandwidth_hz = dev->bandwidth->val;
1274
1275                 if (!test_bit(POWER_ON, &dev->flags))
1276                         return 0;
1277
1278                 if (fe->ops.tuner_ops.set_params)
1279                         ret = fe->ops.tuner_ops.set_params(fe);
1280                 else
1281                         ret = 0;
1282                 break;
1283         default:
1284                 ret = -EINVAL;
1285         }
1286
1287         return ret;
1288 }
1289
1290 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1291         .s_ctrl = rtl2832_sdr_s_ctrl,
1292 };
1293
1294 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1295 {
1296         struct rtl2832_sdr_dev *dev =
1297                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1298         struct platform_device *pdev = dev->pdev;
1299
1300         dev_dbg(&pdev->dev, "\n");
1301
1302         v4l2_ctrl_handler_free(&dev->hdl);
1303         v4l2_device_unregister(&dev->v4l2_dev);
1304         kfree(dev);
1305 }
1306
1307 /* Platform driver interface */
1308 static int rtl2832_sdr_probe(struct platform_device *pdev)
1309 {
1310         struct rtl2832_sdr_dev *dev;
1311         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1312         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1313         struct v4l2_subdev *subdev;
1314         int ret;
1315
1316         dev_dbg(&pdev->dev, "\n");
1317
1318         if (!pdata) {
1319                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1320                 ret = -EINVAL;
1321                 goto err;
1322         }
1323         if (!pdev->dev.parent->driver) {
1324                 dev_dbg(&pdev->dev, "No parent device\n");
1325                 ret = -EINVAL;
1326                 goto err;
1327         }
1328         /* try to refcount host drv since we are the consumer */
1329         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1330                 dev_err(&pdev->dev, "Refcount fail");
1331                 ret = -EINVAL;
1332                 goto err;
1333         }
1334         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1335         if (dev == NULL) {
1336                 ret = -ENOMEM;
1337                 goto err_module_put;
1338         }
1339
1340         /* setup the state */
1341         subdev = pdata->v4l2_subdev;
1342         dev->v4l2_subdev = pdata->v4l2_subdev;
1343         dev->pdev = pdev;
1344         dev->regmap = pdata->regmap;
1345         dev->udev = pdata->dvb_usb_device->udev;
1346         dev->f_adc = bands_adc[0].rangelow;
1347         dev->f_tuner = bands_fm[0].rangelow;
1348         dev->pixelformat = formats[0].pixelformat;
1349         dev->buffersize = formats[0].buffersize;
1350         dev->num_formats = NUM_FORMATS;
1351         if (!rtl2832_sdr_emulated_fmt)
1352                 dev->num_formats -= 1;
1353
1354         mutex_init(&dev->v4l2_lock);
1355         mutex_init(&dev->vb_queue_lock);
1356         spin_lock_init(&dev->queued_bufs_lock);
1357         INIT_LIST_HEAD(&dev->queued_bufs);
1358
1359         /* Init videobuf2 queue structure */
1360         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1361         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1362         dev->vb_queue.drv_priv = dev;
1363         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1364         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1365         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1366         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1367         ret = vb2_queue_init(&dev->vb_queue);
1368         if (ret) {
1369                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1370                 goto err_kfree;
1371         }
1372
1373         /* Register controls */
1374         switch (pdata->tuner) {
1375         case RTL2832_SDR_TUNER_E4000:
1376                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1377                 if (subdev)
1378                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1379                                               NULL, true);
1380                 break;
1381         case RTL2832_SDR_TUNER_R820T:
1382         case RTL2832_SDR_TUNER_R828D:
1383                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1384                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1385                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1386                                                         0, 1, 1, 1);
1387                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1388                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1389                                                    0, 8000000, 100000, 0);
1390                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1391                 break;
1392         case RTL2832_SDR_TUNER_FC0012:
1393         case RTL2832_SDR_TUNER_FC0013:
1394                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1395                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1396                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1397                                                         0, 1, 1, 1);
1398                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1399                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1400                                                    6000000, 8000000, 1000000,
1401                                                    6000000);
1402                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1403                 break;
1404         case RTL2832_SDR_TUNER_FC2580:
1405                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1406                 if (subdev)
1407                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1408                                               NULL, true);
1409                 break;
1410         default:
1411                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1412                 dev_err(&pdev->dev, "Unsupported tuner\n");
1413                 ret = -ENODEV;
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 <[email protected]>");
1496 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1497 MODULE_LICENSE("GPL");