kernel/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-vmalloc.h>
  33
  34 #include <linux/platform_device.h>
  35 #include <linux/jiffies.h>
  36 #include <linux/math64.h>
  37
  38 static bool rtl2832_sdr_emulated_fmt;
  39 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
  40 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  41
  42 #define MAX_BULK_BUFS            (10)
  43 #define BULK_BUFFER_SIZE         (128 * 512)
  44
  45 static const struct v4l2_frequency_band bands_adc[] = {
  46         {
  47                 .tuner = 0,
  48                 .type = V4L2_TUNER_ADC,
  49                 .index = 0,
  50                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  51                 .rangelow   =  300000,
  52                 .rangehigh  =  300000,
  53         },
  54         {
  55                 .tuner = 0,
  56                 .type = V4L2_TUNER_ADC,
  57                 .index = 1,
  58                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  59                 .rangelow   =  900001,
  60                 .rangehigh  = 2800000,
  61         },
  62         {
  63                 .tuner = 0,
  64                 .type = V4L2_TUNER_ADC,
  65                 .index = 2,
  66                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  67                 .rangelow   = 3200000,
  68                 .rangehigh  = 3200000,
  69         },
  70 };
  71
  72 static const struct v4l2_frequency_band bands_fm[] = {
  73         {
  74                 .tuner = 1,
  75                 .type = V4L2_TUNER_RF,
  76                 .index = 0,
  77                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  78                 .rangelow   =    50000000,
  79                 .rangehigh  =  2000000000,
  80         },
  81 };
  82
  83 /* stream formats */
  84 struct rtl2832_sdr_format {
  85         char    *name;
  86         u32     pixelformat;
  87         u32     buffersize;
  88 };
  89
  90 static struct rtl2832_sdr_format formats[] = {
  91         {
  92                 .name           = "Complex U8",
  93                 .pixelformat    = V4L2_SDR_FMT_CU8,
  94                 .buffersize     = BULK_BUFFER_SIZE,
  95         }, {
  96                 .name           = "Complex U16LE (emulated)",
  97                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
  98                 .buffersize     = BULK_BUFFER_SIZE * 2,
  99         },
 100 };
 101
 102 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
 103
 104 /* intermediate buffers with raw data from the USB device */
 105 struct rtl2832_sdr_frame_buf {
 106         struct vb2_buffer vb;   /* common v4l buffer stuff -- must be first */
 107         struct list_head list;
 108 };
 109
 110 struct rtl2832_sdr_dev {
 111 #define POWER_ON           (1 << 1)
 112 #define URB_BUF            (1 << 2)
 113         unsigned long flags;
 114
 115         struct platform_device *pdev;
 116
 117         struct video_device vdev;
 118         struct v4l2_device v4l2_dev;
 119
 120         /* videobuf2 queue and queued buffers list */
 121         struct vb2_queue vb_queue;
 122         struct list_head queued_bufs;
 123         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 124         unsigned sequence;           /* buffer sequence counter */
 125
 126         /* Note if taking both locks v4l2_lock must always be locked first! */
 127         struct mutex v4l2_lock;      /* Protects everything else */
 128         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 129
 130         /* Pointer to our usb_device, will be NULL after unplug */
 131         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 132
 133         unsigned int vb_full; /* vb is full and packets dropped */
 134
 135         struct urb     *urb_list[MAX_BULK_BUFS];
 136         int            buf_num;
 137         unsigned long  buf_size;
 138         u8             *buf_list[MAX_BULK_BUFS];
 139         dma_addr_t     dma_addr[MAX_BULK_BUFS];
 140         int urbs_initialized;
 141         int urbs_submitted;
 142
 143         unsigned int f_adc, f_tuner;
 144         u32 pixelformat;
 145         u32 buffersize;
 146         unsigned int num_formats;
 147
 148         /* Controls */
 149         struct v4l2_ctrl_handler hdl;
 150         struct v4l2_ctrl *bandwidth_auto;
 151         struct v4l2_ctrl *bandwidth;
 152
 153         /* for sample rate calc */
 154         unsigned int sample;
 155         unsigned int sample_measured;
 156         unsigned long jiffies_next;
 157 };
 158
 159 /* write multiple registers */
 160 static int rtl2832_sdr_wr_regs(struct rtl2832_sdr_dev *dev, u16 reg,
 161                 const u8 *val, int len)
 162 {
 163         struct platform_device *pdev = dev->pdev;
 164         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 165         struct i2c_client *client = pdata->i2c_client;
 166
 167         return pdata->bulk_write(client, reg, val, len);
 168 }
 169
 170 #if 0
 171 /* read multiple registers */
 172 static int rtl2832_sdr_rd_regs(struct rtl2832_sdr_dev *dev, u16 reg, u8 *val,
 173                 int len)
 174 {
 175         struct platform_device *pdev = dev->pdev;
 176         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 177         struct i2c_client *client = pdata->i2c_client;
 178
 179         return pdata->bulk_read(client, reg, val, len);
 180 }
 181 #endif
 182
 183 /* write single register */
 184 static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_dev *dev, u16 reg, u8 val)
 185 {
 186         return rtl2832_sdr_wr_regs(dev, reg, &val, 1);
 187 }
 188
 189 /* write single register with mask */
 190 static int rtl2832_sdr_wr_reg_mask(struct rtl2832_sdr_dev *dev, u16 reg,
 191                 u8 val, u8 mask)
 192 {
 193         struct platform_device *pdev = dev->pdev;
 194         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 195         struct i2c_client *client = pdata->i2c_client;
 196
 197         return pdata->update_bits(client, reg, mask, val);
 198 }
 199
 200 /* Private functions */
 201 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 202                 struct rtl2832_sdr_dev *dev)
 203 {
 204         unsigned long flags;
 205         struct rtl2832_sdr_frame_buf *buf = NULL;
 206
 207         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 208         if (list_empty(&dev->queued_bufs))
 209                 goto leave;
 210
 211         buf = list_entry(dev->queued_bufs.next,
 212                         struct rtl2832_sdr_frame_buf, list);
 213         list_del(&buf->list);
 214 leave:
 215         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 216         return buf;
 217 }
 218
 219 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 220                 void *dst, const u8 *src, unsigned int src_len)
 221 {
 222         struct platform_device *pdev = dev->pdev;
 223         unsigned int dst_len;
 224
 225         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 226                 /* native stream, no need to convert */
 227                 memcpy(dst, src, src_len);
 228                 dst_len = src_len;
 229         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 230                 /* convert u8 to u16 */
 231                 unsigned int i;
 232                 u16 *u16dst = dst;
 233
 234                 for (i = 0; i < src_len; i++)
 235                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
 236                 dst_len = 2 * src_len;
 237         } else {
 238                 dst_len = 0;
 239         }
 240
 241         /* calculate sample rate and output it in 10 seconds intervals */
 242         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 243                 #define MSECS 10000UL
 244                 unsigned int msecs = jiffies_to_msecs(jiffies -
 245                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 246                 unsigned int samples = dev->sample - dev->sample_measured;
 247
 248                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 249                 dev->sample_measured = dev->sample;
 250                 dev_dbg(&pdev->dev,
 251                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
 252                         src_len, samples, msecs, samples * 1000UL / msecs);
 253         }
 254
 255         /* total number of I+Q pairs */
 256         dev->sample += src_len / 2;
 257
 258         return dst_len;
 259 }
 260
 261 /*
 262  * This gets called for the bulk stream pipe. This is done in interrupt
 263  * time, so it has to be fast, not crash, and not stall. Neat.
 264  */
 265 static void rtl2832_sdr_urb_complete(struct urb *urb)
 266 {
 267         struct rtl2832_sdr_dev *dev = urb->context;
 268         struct platform_device *pdev = dev->pdev;
 269         struct rtl2832_sdr_frame_buf *fbuf;
 270
 271         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 272                             urb->status, urb->actual_length,
 273                             urb->transfer_buffer_length, urb->error_count);
 274
 275         switch (urb->status) {
 276         case 0:             /* success */
 277         case -ETIMEDOUT:    /* NAK */
 278                 break;
 279         case -ECONNRESET:   /* kill */
 280         case -ENOENT:
 281         case -ESHUTDOWN:
 282                 return;
 283         default:            /* error */
 284                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 285                 break;
 286         }
 287
 288         if (likely(urb->actual_length > 0)) {
 289                 void *ptr;
 290                 unsigned int len;
 291                 /* get free framebuffer */
 292                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 293                 if (unlikely(fbuf == NULL)) {
 294                         dev->vb_full++;
 295                         dev_notice_ratelimited(&pdev->dev,
 296                                                "videobuf is full, %d packets dropped\n",
 297                                                dev->vb_full);
 298                         goto skip;
 299                 }
 300
 301                 /* fill framebuffer */
 302                 ptr = vb2_plane_vaddr(&fbuf->vb, 0);
 303                 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
 304                                 urb->actual_length);
 305                 vb2_set_plane_payload(&fbuf->vb, 0, len);
 306                 v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
 307                 fbuf->vb.v4l2_buf.sequence = dev->sequence++;
 308                 vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
 309         }
 310 skip:
 311         usb_submit_urb(urb, GFP_ATOMIC);
 312 }
 313
 314 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
 315 {
 316         struct platform_device *pdev = dev->pdev;
 317         int i;
 318
 319         for (i = dev->urbs_submitted - 1; i >= 0; i--) {
 320                 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
 321                 /* stop the URB */
 322                 usb_kill_urb(dev->urb_list[i]);
 323         }
 324         dev->urbs_submitted = 0;
 325
 326         return 0;
 327 }
 328
 329 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
 330 {
 331         struct platform_device *pdev = dev->pdev;
 332         int i, ret;
 333
 334         for (i = 0; i < dev->urbs_initialized; i++) {
 335                 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
 336                 ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC);
 337                 if (ret) {
 338                         dev_err(&pdev->dev,
 339                                 "Could not submit urb no. %d - get them all back\n",
 340                                 i);
 341                         rtl2832_sdr_kill_urbs(dev);
 342                         return ret;
 343                 }
 344                 dev->urbs_submitted++;
 345         }
 346
 347         return 0;
 348 }
 349
 350 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
 351 {
 352         struct platform_device *pdev = dev->pdev;
 353
 354         if (dev->flags & USB_STATE_URB_BUF) {
 355                 while (dev->buf_num) {
 356                         dev->buf_num--;
 357                         dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
 358                         usb_free_coherent(dev->udev, dev->buf_size,
 359                                           dev->buf_list[dev->buf_num],
 360                                           dev->dma_addr[dev->buf_num]);
 361                 }
 362         }
 363         dev->flags &= ~USB_STATE_URB_BUF;
 364
 365         return 0;
 366 }
 367
 368 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
 369 {
 370         struct platform_device *pdev = dev->pdev;
 371
 372         dev->buf_num = 0;
 373         dev->buf_size = BULK_BUFFER_SIZE;
 374
 375         dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
 376                 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
 377
 378         for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
 379                 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
 380                                 BULK_BUFFER_SIZE, GFP_ATOMIC,
 381                                 &dev->dma_addr[dev->buf_num]);
 382                 if (!dev->buf_list[dev->buf_num]) {
 383                         dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
 384                                 dev->buf_num);
 385                         rtl2832_sdr_free_stream_bufs(dev);
 386                         return -ENOMEM;
 387                 }
 388
 389                 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
 390                         dev->buf_num, dev->buf_list[dev->buf_num],
 391                         (long long)dev->dma_addr[dev->buf_num]);
 392                 dev->flags |= USB_STATE_URB_BUF;
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
 399 {
 400         struct platform_device *pdev = dev->pdev;
 401         int i;
 402
 403         rtl2832_sdr_kill_urbs(dev);
 404
 405         for (i = dev->urbs_initialized - 1; i >= 0; i--) {
 406                 if (dev->urb_list[i]) {
 407                         dev_dbg(&pdev->dev, "free urb=%d\n", i);
 408                         /* free the URBs */
 409                         usb_free_urb(dev->urb_list[i]);
 410                 }
 411         }
 412         dev->urbs_initialized = 0;
 413
 414         return 0;
 415 }
 416
 417 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
 418 {
 419         struct platform_device *pdev = dev->pdev;
 420         int i, j;
 421
 422         /* allocate the URBs */
 423         for (i = 0; i < MAX_BULK_BUFS; i++) {
 424                 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
 425                 dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
 426                 if (!dev->urb_list[i]) {
 427                         dev_dbg(&pdev->dev, "failed\n");
 428                         for (j = 0; j < i; j++)
 429                                 usb_free_urb(dev->urb_list[j]);
 430                         return -ENOMEM;
 431                 }
 432                 usb_fill_bulk_urb(dev->urb_list[i],
 433                                 dev->udev,
 434                                 usb_rcvbulkpipe(dev->udev, 0x81),
 435                                 dev->buf_list[i],
 436                                 BULK_BUFFER_SIZE,
 437                                 rtl2832_sdr_urb_complete, dev);
 438
 439                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 440                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 441                 dev->urbs_initialized++;
 442         }
 443
 444         return 0;
 445 }
 446
 447 /* Must be called with vb_queue_lock hold */
 448 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 449 {
 450         struct platform_device *pdev = dev->pdev;
 451         unsigned long flags;
 452
 453         dev_dbg(&pdev->dev, "\n");
 454
 455         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 456         while (!list_empty(&dev->queued_bufs)) {
 457                 struct rtl2832_sdr_frame_buf *buf;
 458
 459                 buf = list_entry(dev->queued_bufs.next,
 460                                 struct rtl2832_sdr_frame_buf, list);
 461                 list_del(&buf->list);
 462                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 463         }
 464         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 465 }
 466
 467 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 468                 struct v4l2_capability *cap)
 469 {
 470         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 471         struct platform_device *pdev = dev->pdev;
 472
 473         dev_dbg(&pdev->dev, "\n");
 474
 475         strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 476         strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
 477         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 478         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
 479                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
 480         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 481         return 0;
 482 }
 483
 484 /* Videobuf2 operations */
 485 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 486                 const struct v4l2_format *fmt, unsigned int *nbuffers,
 487                 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 488 {
 489         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 490         struct platform_device *pdev = dev->pdev;
 491
 492         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 493
 494         /* Need at least 8 buffers */
 495         if (vq->num_buffers + *nbuffers < 8)
 496                 *nbuffers = 8 - vq->num_buffers;
 497         *nplanes = 1;
 498         sizes[0] = PAGE_ALIGN(dev->buffersize);
 499         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 500         return 0;
 501 }
 502
 503 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 504 {
 505         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 506
 507         /* Don't allow queing new buffers after device disconnection */
 508         if (!dev->udev)
 509                 return -ENODEV;
 510
 511         return 0;
 512 }
 513
 514 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 515 {
 516         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 517         struct rtl2832_sdr_frame_buf *buf =
 518                         container_of(vb, struct rtl2832_sdr_frame_buf, vb);
 519         unsigned long flags;
 520
 521         /* Check the device has not disconnected between prep and queuing */
 522         if (!dev->udev) {
 523                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 524                 return;
 525         }
 526
 527         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 528         list_add_tail(&buf->list, &dev->queued_bufs);
 529         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 530 }
 531
 532 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 533 {
 534         struct platform_device *pdev = dev->pdev;
 535         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 536         struct dvb_frontend *fe = pdata->dvb_frontend;
 537         int ret;
 538         unsigned int f_sr, f_if;
 539         u8 buf[4], u8tmp1, u8tmp2;
 540         u64 u64tmp;
 541         u32 u32tmp;
 542
 543         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 544
 545         if (!test_bit(POWER_ON, &dev->flags))
 546                 return 0;
 547
 548         if (dev->f_adc == 0)
 549                 return 0;
 550
 551         f_sr = dev->f_adc;
 552
 553         ret = rtl2832_sdr_wr_regs(dev, 0x13e, "\x00\x00", 2);
 554         if (ret)
 555                 goto err;
 556
 557         ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x00\x00\x00\x00", 4);
 558         if (ret)
 559                 goto err;
 560
 561         /* get IF from tuner */
 562         if (fe->ops.tuner_ops.get_if_frequency)
 563                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 564         else
 565                 ret = -EINVAL;
 566
 567         if (ret)
 568                 goto err;
 569
 570         /* program IF */
 571         u64tmp = f_if % pdata->clk;
 572         u64tmp *= 0x400000;
 573         u64tmp = div_u64(u64tmp, pdata->clk);
 574         u64tmp = -u64tmp;
 575         u32tmp = u64tmp & 0x3fffff;
 576
 577         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 578
 579         buf[0] = (u32tmp >> 16) & 0xff;
 580         buf[1] = (u32tmp >>  8) & 0xff;
 581         buf[2] = (u32tmp >>  0) & 0xff;
 582
 583         ret = rtl2832_sdr_wr_regs(dev, 0x119, buf, 3);
 584         if (ret)
 585                 goto err;
 586
 587         /* BB / IF mode */
 588         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 589         if (f_if) {
 590                 u8tmp1 = 0x1a; /* disable Zero-IF */
 591                 u8tmp2 = 0x8d; /* enable ADC I */
 592         } else {
 593                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 594                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 595         }
 596
 597         ret = rtl2832_sdr_wr_reg(dev, 0x1b1, u8tmp1);
 598         if (ret)
 599                 goto err;
 600
 601         ret = rtl2832_sdr_wr_reg(dev, 0x008, u8tmp2);
 602         if (ret)
 603                 goto err;
 604
 605         ret = rtl2832_sdr_wr_reg(dev, 0x006, 0x80);
 606         if (ret)
 607                 goto err;
 608
 609         /* program sampling rate (resampling down) */
 610         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 611         u32tmp <<= 2;
 612         buf[0] = (u32tmp >> 24) & 0xff;
 613         buf[1] = (u32tmp >> 16) & 0xff;
 614         buf[2] = (u32tmp >>  8) & 0xff;
 615         buf[3] = (u32tmp >>  0) & 0xff;
 616         ret = rtl2832_sdr_wr_regs(dev, 0x19f, buf, 4);
 617         if (ret)
 618                 goto err;
 619
 620         /* low-pass filter */
 621         ret = rtl2832_sdr_wr_regs(dev, 0x11c,
 622                         "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 623                         20);
 624         if (ret)
 625                 goto err;
 626
 627         ret = rtl2832_sdr_wr_regs(dev, 0x017, "\x11\x10", 2);
 628         if (ret)
 629                 goto err;
 630
 631         /* mode */
 632         ret = rtl2832_sdr_wr_regs(dev, 0x019, "\x05", 1);
 633         if (ret)
 634                 goto err;
 635
 636         ret = rtl2832_sdr_wr_regs(dev, 0x01a, "\x1b\x16\x0d\x06\x01\xff", 6);
 637         if (ret)
 638                 goto err;
 639
 640         /* FSM */
 641         ret = rtl2832_sdr_wr_regs(dev, 0x192, "\x00\xf0\x0f", 3);
 642         if (ret)
 643                 goto err;
 644
 645         /* PID filter */
 646         ret = rtl2832_sdr_wr_regs(dev, 0x061, "\x60", 1);
 647         if (ret)
 648                 goto err;
 649
 650         /* used RF tuner based settings */
 651         switch (pdata->tuner) {
 652         case RTL2832_SDR_TUNER_E4000:
 653                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
 654                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 655                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
 656                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x30", 1);
 657                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xd0", 1);
 658                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 659                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x18", 1);
 660                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 661                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 662                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 663                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 664                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 665                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 666                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 667                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 668                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 669                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
 670                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 671                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 672                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 673                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xd4", 1);
 674                 ret = rtl2832_sdr_wr_regs(dev, 0x1e5, "\xf0", 1);
 675                 ret = rtl2832_sdr_wr_regs(dev, 0x1d9, "\x00", 1);
 676                 ret = rtl2832_sdr_wr_regs(dev, 0x1db, "\x00", 1);
 677                 ret = rtl2832_sdr_wr_regs(dev, 0x1dd, "\x14", 1);
 678                 ret = rtl2832_sdr_wr_regs(dev, 0x1de, "\xec", 1);
 679                 ret = rtl2832_sdr_wr_regs(dev, 0x1d8, "\x0c", 1);
 680                 ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
 681                 ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
 682                 ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x83", 1);
 683                 ret = rtl2832_sdr_wr_regs(dev, 0x010, "\x49", 1);
 684                 ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x87", 1);
 685                 ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x85", 1);
 686                 ret = rtl2832_sdr_wr_regs(dev, 0x013, "\x02", 1);
 687                 break;
 688         case RTL2832_SDR_TUNER_FC0012:
 689         case RTL2832_SDR_TUNER_FC0013:
 690                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
 691                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 692                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
 693                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x2c", 1);
 694                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
 695                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 696                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x16", 1);
 697                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 698                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 699                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 700                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 701                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 702                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 703                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 704                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 705                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 706                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
 707                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 708                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 709                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 710                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xe9\xbf", 2);
 711                 ret = rtl2832_sdr_wr_regs(dev, 0x1e5, "\xf0", 1);
 712                 ret = rtl2832_sdr_wr_regs(dev, 0x1d9, "\x00", 1);
 713                 ret = rtl2832_sdr_wr_regs(dev, 0x1db, "\x00", 1);
 714                 ret = rtl2832_sdr_wr_regs(dev, 0x1dd, "\x11", 1);
 715                 ret = rtl2832_sdr_wr_regs(dev, 0x1de, "\xef", 1);
 716                 ret = rtl2832_sdr_wr_regs(dev, 0x1d8, "\x0c", 1);
 717                 ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
 718                 ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
 719                 break;
 720         case RTL2832_SDR_TUNER_R820T:
 721         case RTL2832_SDR_TUNER_R828D:
 722                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
 723                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 724                 ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x01", 1);
 725                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x80", 1);
 726                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x24", 1);
 727                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
 728                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 729                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x14", 1);
 730                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 731                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 732                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 733                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 734                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 735                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 736                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 737                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 738                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 739                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
 740                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 741                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 742                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 743                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xf4", 1);
 744                 break;
 745         default:
 746                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 747         }
 748
 749         /* software reset */
 750         ret = rtl2832_sdr_wr_reg_mask(dev, 0x101, 0x04, 0x04);
 751         if (ret)
 752                 goto err;
 753
 754         ret = rtl2832_sdr_wr_reg_mask(dev, 0x101, 0x00, 0x04);
 755         if (ret)
 756                 goto err;
 757 err:
 758         return ret;
 759 };
 760
 761 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 762 {
 763         struct platform_device *pdev = dev->pdev;
 764         int ret;
 765
 766         dev_dbg(&pdev->dev, "\n");
 767
 768         /* PID filter */
 769         ret = rtl2832_sdr_wr_regs(dev, 0x061, "\xe0", 1);
 770         if (ret)
 771                 goto err;
 772
 773         /* mode */
 774         ret = rtl2832_sdr_wr_regs(dev, 0x019, "\x20", 1);
 775         if (ret)
 776                 goto err;
 777
 778         ret = rtl2832_sdr_wr_regs(dev, 0x017, "\x11\x10", 2);
 779         if (ret)
 780                 goto err;
 781
 782         /* FSM */
 783         ret = rtl2832_sdr_wr_regs(dev, 0x192, "\x00\x0f\xff", 3);
 784         if (ret)
 785                 goto err;
 786
 787         ret = rtl2832_sdr_wr_regs(dev, 0x13e, "\x40\x00", 2);
 788         if (ret)
 789                 goto err;
 790
 791         ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x06\x3f\xce\xcc", 4);
 792         if (ret)
 793                 goto err;
 794 err:
 795         return;
 796 };
 797
 798 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 799 {
 800         struct platform_device *pdev = dev->pdev;
 801         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 802         struct dvb_frontend *fe = pdata->dvb_frontend;
 803         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 804         struct v4l2_ctrl *bandwidth_auto;
 805         struct v4l2_ctrl *bandwidth;
 806
 807         /*
 808          * tuner RF (Hz)
 809          */
 810         if (dev->f_tuner == 0)
 811                 return 0;
 812
 813         /*
 814          * bandwidth (Hz)
 815          */
 816         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 817                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 818         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 819         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 820                 c->bandwidth_hz = dev->f_adc;
 821                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 822         } else {
 823                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 824         }
 825
 826         c->frequency = dev->f_tuner;
 827         c->delivery_system = SYS_DVBT;
 828
 829         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 830                 c->frequency, c->bandwidth_hz);
 831
 832         if (!test_bit(POWER_ON, &dev->flags))
 833                 return 0;
 834
 835         if (fe->ops.tuner_ops.set_params)
 836                 fe->ops.tuner_ops.set_params(fe);
 837
 838         return 0;
 839 };
 840
 841 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 842 {
 843         struct platform_device *pdev = dev->pdev;
 844         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 845         struct dvb_frontend *fe = pdata->dvb_frontend;
 846
 847         dev_dbg(&pdev->dev, "\n");
 848
 849         if (fe->ops.tuner_ops.init)
 850                 fe->ops.tuner_ops.init(fe);
 851
 852         return 0;
 853 };
 854
 855 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 856 {
 857         struct platform_device *pdev = dev->pdev;
 858         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 859         struct dvb_frontend *fe = pdata->dvb_frontend;
 860
 861         dev_dbg(&pdev->dev, "\n");
 862
 863         if (fe->ops.tuner_ops.sleep)
 864                 fe->ops.tuner_ops.sleep(fe);
 865
 866         return;
 867 };
 868
 869 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 870 {
 871         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 872         struct platform_device *pdev = dev->pdev;
 873         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 874         struct dvb_usb_device *d = pdata->dvb_usb_device;
 875         int ret;
 876
 877         dev_dbg(&pdev->dev, "\n");
 878
 879         if (!dev->udev)
 880                 return -ENODEV;
 881
 882         if (mutex_lock_interruptible(&dev->v4l2_lock))
 883                 return -ERESTARTSYS;
 884
 885         if (d->props->power_ctrl)
 886                 d->props->power_ctrl(d, 1);
 887
 888         /* enable ADC */
 889         if (d->props->frontend_ctrl)
 890                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 891
 892         set_bit(POWER_ON, &dev->flags);
 893
 894         ret = rtl2832_sdr_set_tuner(dev);
 895         if (ret)
 896                 goto err;
 897
 898         ret = rtl2832_sdr_set_tuner_freq(dev);
 899         if (ret)
 900                 goto err;
 901
 902         ret = rtl2832_sdr_set_adc(dev);
 903         if (ret)
 904                 goto err;
 905
 906         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 907         if (ret)
 908                 goto err;
 909
 910         ret = rtl2832_sdr_alloc_urbs(dev);
 911         if (ret)
 912                 goto err;
 913
 914         dev->sequence = 0;
 915
 916         ret = rtl2832_sdr_submit_urbs(dev);
 917         if (ret)
 918                 goto err;
 919
 920 err:
 921         mutex_unlock(&dev->v4l2_lock);
 922
 923         return ret;
 924 }
 925
 926 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 927 {
 928         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 929         struct platform_device *pdev = dev->pdev;
 930         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 931         struct dvb_usb_device *d = pdata->dvb_usb_device;
 932
 933         dev_dbg(&pdev->dev, "\n");
 934
 935         mutex_lock(&dev->v4l2_lock);
 936
 937         rtl2832_sdr_kill_urbs(dev);
 938         rtl2832_sdr_free_urbs(dev);
 939         rtl2832_sdr_free_stream_bufs(dev);
 940         rtl2832_sdr_cleanup_queued_bufs(dev);
 941         rtl2832_sdr_unset_adc(dev);
 942         rtl2832_sdr_unset_tuner(dev);
 943
 944         clear_bit(POWER_ON, &dev->flags);
 945
 946         /* disable ADC */
 947         if (d->props->frontend_ctrl)
 948                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 949
 950         if (d->props->power_ctrl)
 951                 d->props->power_ctrl(d, 0);
 952
 953         mutex_unlock(&dev->v4l2_lock);
 954 }
 955
 956 static struct vb2_ops rtl2832_sdr_vb2_ops = {
 957         .queue_setup            = rtl2832_sdr_queue_setup,
 958         .buf_prepare            = rtl2832_sdr_buf_prepare,
 959         .buf_queue              = rtl2832_sdr_buf_queue,
 960         .start_streaming        = rtl2832_sdr_start_streaming,
 961         .stop_streaming         = rtl2832_sdr_stop_streaming,
 962         .wait_prepare           = vb2_ops_wait_prepare,
 963         .wait_finish            = vb2_ops_wait_finish,
 964 };
 965
 966 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
 967                 struct v4l2_tuner *v)
 968 {
 969         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 970         struct platform_device *pdev = dev->pdev;
 971
 972         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
 973
 974         if (v->index == 0) {
 975                 strlcpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
 976                 v->type = V4L2_TUNER_ADC;
 977                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 978                 v->rangelow =   300000;
 979                 v->rangehigh = 3200000;
 980         } else if (v->index == 1) {
 981                 strlcpy(v->name, "RF: <unknown>", sizeof(v->name));
 982                 v->type = V4L2_TUNER_RF;
 983                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 984                 v->rangelow =    50000000;
 985                 v->rangehigh = 2000000000;
 986         } else {
 987                 return -EINVAL;
 988         }
 989
 990         return 0;
 991 }
 992
 993 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
 994                 const struct v4l2_tuner *v)
 995 {
 996         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 997         struct platform_device *pdev = dev->pdev;
 998
 999         dev_dbg(&pdev->dev, "\n");
1000
1001         if (v->index > 1)
1002                 return -EINVAL;
1003         return 0;
1004 }
1005
1006 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1007                 struct v4l2_frequency_band *band)
1008 {
1009         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1010         struct platform_device *pdev = dev->pdev;
1011
1012         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1013                 band->tuner, band->type, band->index);
1014
1015         if (band->tuner == 0) {
1016                 if (band->index >= ARRAY_SIZE(bands_adc))
1017                         return -EINVAL;
1018
1019                 *band = bands_adc[band->index];
1020         } else if (band->tuner == 1) {
1021                 if (band->index >= ARRAY_SIZE(bands_fm))
1022                         return -EINVAL;
1023
1024                 *band = bands_fm[band->index];
1025         } else {
1026                 return -EINVAL;
1027         }
1028
1029         return 0;
1030 }
1031
1032 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1033                 struct v4l2_frequency *f)
1034 {
1035         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1036         struct platform_device *pdev = dev->pdev;
1037         int ret  = 0;
1038
1039         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1040
1041         if (f->tuner == 0) {
1042                 f->frequency = dev->f_adc;
1043                 f->type = V4L2_TUNER_ADC;
1044         } else if (f->tuner == 1) {
1045                 f->frequency = dev->f_tuner;
1046                 f->type = V4L2_TUNER_RF;
1047         } else {
1048                 return -EINVAL;
1049         }
1050
1051         return ret;
1052 }
1053
1054 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1055                 const struct v4l2_frequency *f)
1056 {
1057         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1058         struct platform_device *pdev = dev->pdev;
1059         int ret, band;
1060
1061         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1062                 f->tuner, f->type, f->frequency);
1063
1064         /* ADC band midpoints */
1065         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1066         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1067
1068         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1069                 if (f->frequency < BAND_ADC_0)
1070                         band = 0;
1071                 else if (f->frequency < BAND_ADC_1)
1072                         band = 1;
1073                 else
1074                         band = 2;
1075
1076                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1077                                 bands_adc[band].rangelow,
1078                                 bands_adc[band].rangehigh);
1079
1080                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1081                 ret = rtl2832_sdr_set_adc(dev);
1082         } else if (f->tuner == 1) {
1083                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1084                                 bands_fm[0].rangelow,
1085                                 bands_fm[0].rangehigh);
1086                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1087
1088                 ret = rtl2832_sdr_set_tuner_freq(dev);
1089         } else {
1090                 ret = -EINVAL;
1091         }
1092
1093         return ret;
1094 }
1095
1096 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1097                 struct v4l2_fmtdesc *f)
1098 {
1099         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1100         struct platform_device *pdev = dev->pdev;
1101
1102         dev_dbg(&pdev->dev, "\n");
1103
1104         if (f->index >= dev->num_formats)
1105                 return -EINVAL;
1106
1107         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
1108         f->pixelformat = formats[f->index].pixelformat;
1109
1110         return 0;
1111 }
1112
1113 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1114                 struct v4l2_format *f)
1115 {
1116         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1117         struct platform_device *pdev = dev->pdev;
1118
1119         dev_dbg(&pdev->dev, "\n");
1120
1121         f->fmt.sdr.pixelformat = dev->pixelformat;
1122         f->fmt.sdr.buffersize = dev->buffersize;
1123
1124         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1125
1126         return 0;
1127 }
1128
1129 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1130                 struct v4l2_format *f)
1131 {
1132         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1133         struct platform_device *pdev = dev->pdev;
1134         struct vb2_queue *q = &dev->vb_queue;
1135         int i;
1136
1137         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1138                 (char *)&f->fmt.sdr.pixelformat);
1139
1140         if (vb2_is_busy(q))
1141                 return -EBUSY;
1142
1143         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1144         for (i = 0; i < dev->num_formats; i++) {
1145                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1146                         dev->pixelformat = formats[i].pixelformat;
1147                         dev->buffersize = formats[i].buffersize;
1148                         f->fmt.sdr.buffersize = formats[i].buffersize;
1149                         return 0;
1150                 }
1151         }
1152
1153         dev->pixelformat = formats[0].pixelformat;
1154         dev->buffersize = formats[0].buffersize;
1155         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1156         f->fmt.sdr.buffersize = formats[0].buffersize;
1157
1158         return 0;
1159 }
1160
1161 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1162                 struct v4l2_format *f)
1163 {
1164         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1165         struct platform_device *pdev = dev->pdev;
1166         int i;
1167
1168         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1169                 (char *)&f->fmt.sdr.pixelformat);
1170
1171         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1172         for (i = 0; i < dev->num_formats; i++) {
1173                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1174                         f->fmt.sdr.buffersize = formats[i].buffersize;
1175                         return 0;
1176                 }
1177         }
1178
1179         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1180         f->fmt.sdr.buffersize = formats[0].buffersize;
1181
1182         return 0;
1183 }
1184
1185 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1186         .vidioc_querycap          = rtl2832_sdr_querycap,
1187
1188         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1189         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1190         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1191         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1192
1193         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1194         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1195         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1196         .vidioc_querybuf          = vb2_ioctl_querybuf,
1197         .vidioc_qbuf              = vb2_ioctl_qbuf,
1198         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1199
1200         .vidioc_streamon          = vb2_ioctl_streamon,
1201         .vidioc_streamoff         = vb2_ioctl_streamoff,
1202
1203         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1204         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1205
1206         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1207         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1208         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1209
1210         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1211         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1212         .vidioc_log_status        = v4l2_ctrl_log_status,
1213 };
1214
1215 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1216         .owner                    = THIS_MODULE,
1217         .open                     = v4l2_fh_open,
1218         .release                  = vb2_fop_release,
1219         .read                     = vb2_fop_read,
1220         .poll                     = vb2_fop_poll,
1221         .mmap                     = vb2_fop_mmap,
1222         .unlocked_ioctl           = video_ioctl2,
1223 };
1224
1225 static struct video_device rtl2832_sdr_template = {
1226         .name                     = "Realtek RTL2832 SDR",
1227         .release                  = video_device_release_empty,
1228         .fops                     = &rtl2832_sdr_fops,
1229         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1230 };
1231
1232 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1233 {
1234         struct rtl2832_sdr_dev *dev =
1235                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1236                                         hdl);
1237         struct platform_device *pdev = dev->pdev;
1238         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1239         struct dvb_frontend *fe = pdata->dvb_frontend;
1240         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1241         int ret;
1242
1243         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1244                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1245                 ctrl->step);
1246
1247         switch (ctrl->id) {
1248         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1249         case V4L2_CID_RF_TUNER_BANDWIDTH:
1250                 /* TODO: these controls should be moved to tuner drivers */
1251                 if (dev->bandwidth_auto->val) {
1252                         /* Round towards the closest legal value */
1253                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1254                         u32 offset;
1255
1256                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1257                                       dev->bandwidth->maximum);
1258                         offset = val - dev->bandwidth->minimum;
1259                         offset = dev->bandwidth->step *
1260                                 div_u64(offset, dev->bandwidth->step);
1261                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1262                 }
1263                 c->bandwidth_hz = dev->bandwidth->val;
1264
1265                 if (!test_bit(POWER_ON, &dev->flags))
1266                         return 0;
1267
1268                 if (fe->ops.tuner_ops.set_params)
1269                         ret = fe->ops.tuner_ops.set_params(fe);
1270                 else
1271                         ret = 0;
1272                 break;
1273         default:
1274                 ret = -EINVAL;
1275         }
1276
1277         return ret;
1278 }
1279
1280 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1281         .s_ctrl = rtl2832_sdr_s_ctrl,
1282 };
1283
1284 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1285 {
1286         struct rtl2832_sdr_dev *dev =
1287                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1288         struct platform_device *pdev = dev->pdev;
1289
1290         dev_dbg(&pdev->dev, "\n");
1291
1292         v4l2_ctrl_handler_free(&dev->hdl);
1293         v4l2_device_unregister(&dev->v4l2_dev);
1294         kfree(dev);
1295 }
1296
1297 /* Platform driver interface */
1298 static int rtl2832_sdr_probe(struct platform_device *pdev)
1299 {
1300         struct rtl2832_sdr_dev *dev;
1301         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1302         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1303         struct v4l2_subdev *subdev;
1304         int ret;
1305
1306         dev_dbg(&pdev->dev, "\n");
1307
1308         if (!pdata) {
1309                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1310                 ret = -EINVAL;
1311                 goto err;
1312         }
1313         if (!pdev->dev.parent->driver) {
1314                 dev_dbg(&pdev->dev, "No parent device\n");
1315                 ret = -EINVAL;
1316                 goto err;
1317         }
1318         /* try to refcount host drv since we are the consumer */
1319         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1320                 dev_err(&pdev->dev, "Refcount fail");
1321                 ret = -EINVAL;
1322                 goto err;
1323         }
1324         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1325         if (dev == NULL) {
1326                 ret = -ENOMEM;
1327                 goto err_module_put;
1328         }
1329
1330         /* setup the state */
1331         subdev = pdata->v4l2_subdev;
1332         dev->pdev = pdev;
1333         dev->udev = pdata->dvb_usb_device->udev;
1334         dev->f_adc = bands_adc[0].rangelow;
1335         dev->f_tuner = bands_fm[0].rangelow;
1336         dev->pixelformat = formats[0].pixelformat;
1337         dev->buffersize = formats[0].buffersize;
1338         dev->num_formats = NUM_FORMATS;
1339         if (!rtl2832_sdr_emulated_fmt)
1340                 dev->num_formats -= 1;
1341
1342         mutex_init(&dev->v4l2_lock);
1343         mutex_init(&dev->vb_queue_lock);
1344         spin_lock_init(&dev->queued_bufs_lock);
1345         INIT_LIST_HEAD(&dev->queued_bufs);
1346
1347         /* Init videobuf2 queue structure */
1348         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1349         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1350         dev->vb_queue.drv_priv = dev;
1351         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1352         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1353         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1354         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1355         ret = vb2_queue_init(&dev->vb_queue);
1356         if (ret) {
1357                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1358                 goto err_kfree;
1359         }
1360
1361         /* Register controls */
1362         switch (pdata->tuner) {
1363         case RTL2832_SDR_TUNER_E4000:
1364                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1365                 if (subdev)
1366                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler, NULL);
1367                 break;
1368         case RTL2832_SDR_TUNER_R820T:
1369         case RTL2832_SDR_TUNER_R828D:
1370                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1371                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1372                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1373                                                         0, 1, 1, 1);
1374                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1375                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1376                                                    0, 8000000, 100000, 0);
1377                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1378                 break;
1379         case RTL2832_SDR_TUNER_FC0012:
1380         case RTL2832_SDR_TUNER_FC0013:
1381                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1382                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1383                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1384                                                         0, 1, 1, 1);
1385                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1386                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1387                                                    6000000, 8000000, 1000000,
1388                                                    6000000);
1389                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1390                 break;
1391         default:
1392                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1393                 dev_err(&pdev->dev, "Unsupported tuner\n");
1394                 goto err_v4l2_ctrl_handler_free;
1395         }
1396         if (dev->hdl.error) {
1397                 ret = dev->hdl.error;
1398                 dev_err(&pdev->dev, "Could not initialize controls\n");
1399                 goto err_v4l2_ctrl_handler_free;
1400         }
1401
1402         /* Init video_device structure */
1403         dev->vdev = rtl2832_sdr_template;
1404         dev->vdev.queue = &dev->vb_queue;
1405         dev->vdev.queue->lock = &dev->vb_queue_lock;
1406         video_set_drvdata(&dev->vdev, dev);
1407
1408         /* Register the v4l2_device structure */
1409         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1410         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1411         if (ret) {
1412                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1413                 goto err_v4l2_ctrl_handler_free;
1414         }
1415
1416         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1417         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1418         dev->vdev.lock = &dev->v4l2_lock;
1419         dev->vdev.vfl_dir = VFL_DIR_RX;
1420
1421         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1422         if (ret) {
1423                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1424                         ret);
1425                 goto err_v4l2_device_unregister;
1426         }
1427         dev_info(&pdev->dev, "Registered as %s\n",
1428                  video_device_node_name(&dev->vdev));
1429         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1430         dev_notice(&pdev->dev,
1431                    "SDR API is still slightly experimental and functionality changes may follow\n");
1432         platform_set_drvdata(pdev, dev);
1433         return 0;
1434 err_v4l2_device_unregister:
1435         v4l2_device_unregister(&dev->v4l2_dev);
1436 err_v4l2_ctrl_handler_free:
1437         v4l2_ctrl_handler_free(&dev->hdl);
1438 err_kfree:
1439         kfree(dev);
1440 err_module_put:
1441         module_put(pdev->dev.parent->driver->owner);
1442 err:
1443         return ret;
1444 }
1445
1446 static int rtl2832_sdr_remove(struct platform_device *pdev)
1447 {
1448         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1449
1450         dev_dbg(&pdev->dev, "\n");
1451
1452         mutex_lock(&dev->vb_queue_lock);
1453         mutex_lock(&dev->v4l2_lock);
1454         /* No need to keep the urbs around after disconnection */
1455         dev->udev = NULL;
1456         v4l2_device_disconnect(&dev->v4l2_dev);
1457         video_unregister_device(&dev->vdev);
1458         mutex_unlock(&dev->v4l2_lock);
1459         mutex_unlock(&dev->vb_queue_lock);
1460         v4l2_device_put(&dev->v4l2_dev);
1461         module_put(pdev->dev.parent->driver->owner);
1462
1463         return 0;
1464 }
1465
1466 static struct platform_driver rtl2832_sdr_driver = {
1467         .driver = {
1468                 .name   = "rtl2832_sdr",
1469                 .owner  = THIS_MODULE,
1470         },
1471         .probe          = rtl2832_sdr_probe,
1472         .remove         = rtl2832_sdr_remove,
1473 };
1474 module_platform_driver(rtl2832_sdr_driver);
1475
1476 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1477 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1478 MODULE_LICENSE("GPL");