drivers/media/dvb-frontends/rtl2832_sdr.c

   1 /*
   2  * Realtek RTL2832U SDR driver
   3  *
   4  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * GNU Radio plugin "gr-kernel" for device usage will be on:
  21  * http://git.linuxtv.org/anttip/gr-kernel.git
  22  *
  23  */
  24
  25 #include "rtl2832_sdr.h"
  26 #include "dvb_usb.h"
  27
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-ioctl.h>
  30 #include <media/v4l2-ctrls.h>
  31 #include <media/v4l2-event.h>
  32 #include <media/videobuf2-v4l2.h>
  33 #include <media/videobuf2-vmalloc.h>
  34
  35 #include <linux/platform_device.h>
  36 #include <linux/jiffies.h>
  37 #include <linux/math64.h>
  38
  39 static bool rtl2832_sdr_emulated_fmt;
  40 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
  41 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  42
  43 /* Original macro does not contain enough null pointer checks for our need */
  44 #define V4L2_SUBDEV_HAS_OP(sd, o, f) \
  45         ((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
  46
  47 #define MAX_BULK_BUFS            (10)
  48 #define BULK_BUFFER_SIZE         (128 * 512)
  49
  50 static const struct v4l2_frequency_band bands_adc[] = {
  51         {
  52                 .tuner = 0,
  53                 .type = V4L2_TUNER_ADC,
  54                 .index = 0,
  55                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  56                 .rangelow   =  300000,
  57                 .rangehigh  =  300000,
  58         },
  59         {
  60                 .tuner = 0,
  61                 .type = V4L2_TUNER_ADC,
  62                 .index = 1,
  63                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  64                 .rangelow   =  900001,
  65                 .rangehigh  = 2800000,
  66         },
  67         {
  68                 .tuner = 0,
  69                 .type = V4L2_TUNER_ADC,
  70                 .index = 2,
  71                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  72                 .rangelow   = 3200000,
  73                 .rangehigh  = 3200000,
  74         },
  75 };
  76
  77 static const struct v4l2_frequency_band bands_fm[] = {
  78         {
  79                 .tuner = 1,
  80                 .type = V4L2_TUNER_RF,
  81                 .index = 0,
  82                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  83                 .rangelow   =    50000000,
  84                 .rangehigh  =  2000000000,
  85         },
  86 };
  87
  88 /* stream formats */
  89 struct rtl2832_sdr_format {
  90         char    *name;
  91         u32     pixelformat;
  92         u32     buffersize;
  93 };
  94
  95 static struct rtl2832_sdr_format formats[] = {
  96         {
  97                 .name           = "Complex U8",
  98                 .pixelformat    = V4L2_SDR_FMT_CU8,
  99                 .buffersize     = BULK_BUFFER_SIZE,
 100         }, {
 101                 .name           = "Complex U16LE (emulated)",
 102                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
 103                 .buffersize     = BULK_BUFFER_SIZE * 2,
 104         },
 105 };
 106
 107 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
 108
 109 /* intermediate buffers with raw data from the USB device */
 110 struct rtl2832_sdr_frame_buf {
 111         /* common v4l buffer stuff -- must be first */
 112         struct vb2_v4l2_buffer vb;
 113         struct list_head list;
 114 };
 115
 116 struct rtl2832_sdr_dev {
 117 #define POWER_ON           0  /* BIT(0) */
 118 #define URB_BUF            1  /* BIT(1) */
 119         unsigned long flags;
 120
 121         struct platform_device *pdev;
 122
 123         struct video_device vdev;
 124         struct v4l2_device v4l2_dev;
 125         struct v4l2_subdev *v4l2_subdev;
 126
 127         /* videobuf2 queue and queued buffers list */
 128         struct vb2_queue vb_queue;
 129         struct list_head queued_bufs;
 130         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 131         unsigned sequence;           /* buffer sequence counter */
 132
 133         /* Note if taking both locks v4l2_lock must always be locked first! */
 134         struct mutex v4l2_lock;      /* Protects everything else */
 135         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 136
 137         /* Pointer to our usb_device, will be NULL after unplug */
 138         struct usb_device *udev; /* Both mutexes most be hold when setting! */
 139
 140         unsigned int vb_full; /* vb is full and packets dropped */
 141
 142         struct urb     *urb_list[MAX_BULK_BUFS];
 143         int            buf_num;
 144         unsigned long  buf_size;
 145         u8             *buf_list[MAX_BULK_BUFS];
 146         dma_addr_t     dma_addr[MAX_BULK_BUFS];
 147         int urbs_initialized;
 148         int urbs_submitted;
 149
 150         unsigned int f_adc, f_tuner;
 151         u32 pixelformat;
 152         u32 buffersize;
 153         unsigned int num_formats;
 154
 155         /* Controls */
 156         struct v4l2_ctrl_handler hdl;
 157         struct v4l2_ctrl *bandwidth_auto;
 158         struct v4l2_ctrl *bandwidth;
 159
 160         /* for sample rate calc */
 161         unsigned int sample;
 162         unsigned int sample_measured;
 163         unsigned long jiffies_next;
 164 };
 165
 166 /* write multiple registers */
 167 static int rtl2832_sdr_wr_regs(struct rtl2832_sdr_dev *dev, u16 reg,
 168                 const u8 *val, int len)
 169 {
 170         struct platform_device *pdev = dev->pdev;
 171         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 172         struct i2c_client *client = pdata->i2c_client;
 173
 174         return pdata->bulk_write(client, reg, val, len);
 175 }
 176
 177 #if 0
 178 /* read multiple registers */
 179 static int rtl2832_sdr_rd_regs(struct rtl2832_sdr_dev *dev, u16 reg, u8 *val,
 180                 int len)
 181 {
 182         struct platform_device *pdev = dev->pdev;
 183         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 184         struct i2c_client *client = pdata->i2c_client;
 185
 186         return pdata->bulk_read(client, reg, val, len);
 187 }
 188 #endif
 189
 190 /* write single register */
 191 static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_dev *dev, u16 reg, u8 val)
 192 {
 193         return rtl2832_sdr_wr_regs(dev, reg, &val, 1);
 194 }
 195
 196 /* write single register with mask */
 197 static int rtl2832_sdr_wr_reg_mask(struct rtl2832_sdr_dev *dev, u16 reg,
 198                 u8 val, u8 mask)
 199 {
 200         struct platform_device *pdev = dev->pdev;
 201         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 202         struct i2c_client *client = pdata->i2c_client;
 203
 204         return pdata->update_bits(client, reg, mask, val);
 205 }
 206
 207 /* Private functions */
 208 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 209                 struct rtl2832_sdr_dev *dev)
 210 {
 211         unsigned long flags;
 212         struct rtl2832_sdr_frame_buf *buf = NULL;
 213
 214         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 215         if (list_empty(&dev->queued_bufs))
 216                 goto leave;
 217
 218         buf = list_entry(dev->queued_bufs.next,
 219                         struct rtl2832_sdr_frame_buf, list);
 220         list_del(&buf->list);
 221 leave:
 222         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 223         return buf;
 224 }
 225
 226 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 227                 void *dst, const u8 *src, unsigned int src_len)
 228 {
 229         struct platform_device *pdev = dev->pdev;
 230         unsigned int dst_len;
 231
 232         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 233                 /* native stream, no need to convert */
 234                 memcpy(dst, src, src_len);
 235                 dst_len = src_len;
 236         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 237                 /* convert u8 to u16 */
 238                 unsigned int i;
 239                 u16 *u16dst = dst;
 240
 241                 for (i = 0; i < src_len; i++)
 242                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
 243                 dst_len = 2 * src_len;
 244         } else {
 245                 dst_len = 0;
 246         }
 247
 248         /* calculate sample rate and output it in 10 seconds intervals */
 249         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 250                 #define MSECS 10000UL
 251                 unsigned int msecs = jiffies_to_msecs(jiffies -
 252                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
 253                 unsigned int samples = dev->sample - dev->sample_measured;
 254
 255                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 256                 dev->sample_measured = dev->sample;
 257                 dev_dbg(&pdev->dev,
 258                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
 259                         src_len, samples, msecs, samples * 1000UL / msecs);
 260         }
 261
 262         /* total number of I+Q pairs */
 263         dev->sample += src_len / 2;
 264
 265         return dst_len;
 266 }
 267
 268 /*
 269  * This gets called for the bulk stream pipe. This is done in interrupt
 270  * time, so it has to be fast, not crash, and not stall. Neat.
 271  */
 272 static void rtl2832_sdr_urb_complete(struct urb *urb)
 273 {
 274         struct rtl2832_sdr_dev *dev = urb->context;
 275         struct platform_device *pdev = dev->pdev;
 276         struct rtl2832_sdr_frame_buf *fbuf;
 277
 278         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 279                             urb->status, urb->actual_length,
 280                             urb->transfer_buffer_length, urb->error_count);
 281
 282         switch (urb->status) {
 283         case 0:             /* success */
 284         case -ETIMEDOUT:    /* NAK */
 285                 break;
 286         case -ECONNRESET:   /* kill */
 287         case -ENOENT:
 288         case -ESHUTDOWN:
 289                 return;
 290         default:            /* error */
 291                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 292                 break;
 293         }
 294
 295         if (likely(urb->actual_length > 0)) {
 296                 void *ptr;
 297                 unsigned int len;
 298                 /* get free framebuffer */
 299                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 300                 if (unlikely(fbuf == NULL)) {
 301                         dev->vb_full++;
 302                         dev_notice_ratelimited(&pdev->dev,
 303                                                "videobuf is full, %d packets dropped\n",
 304                                                dev->vb_full);
 305                         goto skip;
 306                 }
 307
 308                 /* fill framebuffer */
 309                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 310                 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
 311                                 urb->actual_length);
 312                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
 313                 v4l2_get_timestamp(&fbuf->vb.timestamp);
 314                 fbuf->vb.sequence = dev->sequence++;
 315                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 316         }
 317 skip:
 318         usb_submit_urb(urb, GFP_ATOMIC);
 319 }
 320
 321 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
 322 {
 323         struct platform_device *pdev = dev->pdev;
 324         int i;
 325
 326         for (i = dev->urbs_submitted - 1; i >= 0; i--) {
 327                 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
 328                 /* stop the URB */
 329                 usb_kill_urb(dev->urb_list[i]);
 330         }
 331         dev->urbs_submitted = 0;
 332
 333         return 0;
 334 }
 335
 336 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
 337 {
 338         struct platform_device *pdev = dev->pdev;
 339         int i, ret;
 340
 341         for (i = 0; i < dev->urbs_initialized; i++) {
 342                 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
 343                 ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC);
 344                 if (ret) {
 345                         dev_err(&pdev->dev,
 346                                 "Could not submit urb no. %d - get them all back\n",
 347                                 i);
 348                         rtl2832_sdr_kill_urbs(dev);
 349                         return ret;
 350                 }
 351                 dev->urbs_submitted++;
 352         }
 353
 354         return 0;
 355 }
 356
 357 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
 358 {
 359         struct platform_device *pdev = dev->pdev;
 360
 361         if (test_bit(URB_BUF, &dev->flags)) {
 362                 while (dev->buf_num) {
 363                         dev->buf_num--;
 364                         dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
 365                         usb_free_coherent(dev->udev, dev->buf_size,
 366                                           dev->buf_list[dev->buf_num],
 367                                           dev->dma_addr[dev->buf_num]);
 368                 }
 369         }
 370         clear_bit(URB_BUF, &dev->flags);
 371
 372         return 0;
 373 }
 374
 375 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
 376 {
 377         struct platform_device *pdev = dev->pdev;
 378
 379         dev->buf_num = 0;
 380         dev->buf_size = BULK_BUFFER_SIZE;
 381
 382         dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
 383                 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
 384
 385         for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
 386                 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
 387                                 BULK_BUFFER_SIZE, GFP_ATOMIC,
 388                                 &dev->dma_addr[dev->buf_num]);
 389                 if (!dev->buf_list[dev->buf_num]) {
 390                         dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
 391                                 dev->buf_num);
 392                         rtl2832_sdr_free_stream_bufs(dev);
 393                         return -ENOMEM;
 394                 }
 395
 396                 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
 397                         dev->buf_num, dev->buf_list[dev->buf_num],
 398                         (long long)dev->dma_addr[dev->buf_num]);
 399                 set_bit(URB_BUF, &dev->flags);
 400         }
 401
 402         return 0;
 403 }
 404
 405 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
 406 {
 407         struct platform_device *pdev = dev->pdev;
 408         int i;
 409
 410         rtl2832_sdr_kill_urbs(dev);
 411
 412         for (i = dev->urbs_initialized - 1; i >= 0; i--) {
 413                 if (dev->urb_list[i]) {
 414                         dev_dbg(&pdev->dev, "free urb=%d\n", i);
 415                         /* free the URBs */
 416                         usb_free_urb(dev->urb_list[i]);
 417                 }
 418         }
 419         dev->urbs_initialized = 0;
 420
 421         return 0;
 422 }
 423
 424 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
 425 {
 426         struct platform_device *pdev = dev->pdev;
 427         int i, j;
 428
 429         /* allocate the URBs */
 430         for (i = 0; i < MAX_BULK_BUFS; i++) {
 431                 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
 432                 dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
 433                 if (!dev->urb_list[i]) {
 434                         dev_dbg(&pdev->dev, "failed\n");
 435                         for (j = 0; j < i; j++)
 436                                 usb_free_urb(dev->urb_list[j]);
 437                         return -ENOMEM;
 438                 }
 439                 usb_fill_bulk_urb(dev->urb_list[i],
 440                                 dev->udev,
 441                                 usb_rcvbulkpipe(dev->udev, 0x81),
 442                                 dev->buf_list[i],
 443                                 BULK_BUFFER_SIZE,
 444                                 rtl2832_sdr_urb_complete, dev);
 445
 446                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 447                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 448                 dev->urbs_initialized++;
 449         }
 450
 451         return 0;
 452 }
 453
 454 /* Must be called with vb_queue_lock hold */
 455 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 456 {
 457         struct platform_device *pdev = dev->pdev;
 458         unsigned long flags;
 459
 460         dev_dbg(&pdev->dev, "\n");
 461
 462         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 463         while (!list_empty(&dev->queued_bufs)) {
 464                 struct rtl2832_sdr_frame_buf *buf;
 465
 466                 buf = list_entry(dev->queued_bufs.next,
 467                                 struct rtl2832_sdr_frame_buf, list);
 468                 list_del(&buf->list);
 469                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 470         }
 471         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 472 }
 473
 474 static int rtl2832_sdr_querycap(struct file *file, void *fh,
 475                 struct v4l2_capability *cap)
 476 {
 477         struct rtl2832_sdr_dev *dev = video_drvdata(file);
 478         struct platform_device *pdev = dev->pdev;
 479
 480         dev_dbg(&pdev->dev, "\n");
 481
 482         strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 483         strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
 484         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 485         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
 486                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
 487         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 488         return 0;
 489 }
 490
 491 /* Videobuf2 operations */
 492 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 493                 const void *parg, unsigned int *nbuffers,
 494                 unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
 495 {
 496         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 497         struct platform_device *pdev = dev->pdev;
 498
 499         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 500
 501         /* Need at least 8 buffers */
 502         if (vq->num_buffers + *nbuffers < 8)
 503                 *nbuffers = 8 - vq->num_buffers;
 504         *nplanes = 1;
 505         sizes[0] = PAGE_ALIGN(dev->buffersize);
 506         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 507         return 0;
 508 }
 509
 510 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 511 {
 512         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 513
 514         /* Don't allow queing new buffers after device disconnection */
 515         if (!dev->udev)
 516                 return -ENODEV;
 517
 518         return 0;
 519 }
 520
 521 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 522 {
 523         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 524         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 525         struct rtl2832_sdr_frame_buf *buf =
 526                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 527         unsigned long flags;
 528
 529         /* Check the device has not disconnected between prep and queuing */
 530         if (!dev->udev) {
 531                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 532                 return;
 533         }
 534
 535         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 536         list_add_tail(&buf->list, &dev->queued_bufs);
 537         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 538 }
 539
 540 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 541 {
 542         struct platform_device *pdev = dev->pdev;
 543         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 544         struct dvb_frontend *fe = pdata->dvb_frontend;
 545         int ret;
 546         unsigned int f_sr, f_if;
 547         u8 buf[4], u8tmp1, u8tmp2;
 548         u64 u64tmp;
 549         u32 u32tmp;
 550
 551         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 552
 553         if (!test_bit(POWER_ON, &dev->flags))
 554                 return 0;
 555
 556         if (dev->f_adc == 0)
 557                 return 0;
 558
 559         f_sr = dev->f_adc;
 560
 561         ret = rtl2832_sdr_wr_regs(dev, 0x13e, "\x00\x00", 2);
 562         if (ret)
 563                 goto err;
 564
 565         ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x00\x00\x00\x00", 4);
 566         if (ret)
 567                 goto err;
 568
 569         /* get IF from tuner */
 570         if (fe->ops.tuner_ops.get_if_frequency)
 571                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 572         else
 573                 ret = -EINVAL;
 574
 575         if (ret)
 576                 goto err;
 577
 578         /* program IF */
 579         u64tmp = f_if % pdata->clk;
 580         u64tmp *= 0x400000;
 581         u64tmp = div_u64(u64tmp, pdata->clk);
 582         u64tmp = -u64tmp;
 583         u32tmp = u64tmp & 0x3fffff;
 584
 585         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 586
 587         buf[0] = (u32tmp >> 16) & 0xff;
 588         buf[1] = (u32tmp >>  8) & 0xff;
 589         buf[2] = (u32tmp >>  0) & 0xff;
 590
 591         ret = rtl2832_sdr_wr_regs(dev, 0x119, buf, 3);
 592         if (ret)
 593                 goto err;
 594
 595         /* BB / IF mode */
 596         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 597         if (f_if) {
 598                 u8tmp1 = 0x1a; /* disable Zero-IF */
 599                 u8tmp2 = 0x8d; /* enable ADC I */
 600         } else {
 601                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 602                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 603         }
 604
 605         ret = rtl2832_sdr_wr_reg(dev, 0x1b1, u8tmp1);
 606         if (ret)
 607                 goto err;
 608
 609         ret = rtl2832_sdr_wr_reg(dev, 0x008, u8tmp2);
 610         if (ret)
 611                 goto err;
 612
 613         ret = rtl2832_sdr_wr_reg(dev, 0x006, 0x80);
 614         if (ret)
 615                 goto err;
 616
 617         /* program sampling rate (resampling down) */
 618         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 619         u32tmp <<= 2;
 620         buf[0] = (u32tmp >> 24) & 0xff;
 621         buf[1] = (u32tmp >> 16) & 0xff;
 622         buf[2] = (u32tmp >>  8) & 0xff;
 623         buf[3] = (u32tmp >>  0) & 0xff;
 624         ret = rtl2832_sdr_wr_regs(dev, 0x19f, buf, 4);
 625         if (ret)
 626                 goto err;
 627
 628         /* low-pass filter */
 629         ret = rtl2832_sdr_wr_regs(dev, 0x11c,
 630                         "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 631                         20);
 632         if (ret)
 633                 goto err;
 634
 635         ret = rtl2832_sdr_wr_regs(dev, 0x017, "\x11\x10", 2);
 636         if (ret)
 637                 goto err;
 638
 639         /* mode */
 640         ret = rtl2832_sdr_wr_regs(dev, 0x019, "\x05", 1);
 641         if (ret)
 642                 goto err;
 643
 644         ret = rtl2832_sdr_wr_regs(dev, 0x01a, "\x1b\x16\x0d\x06\x01\xff", 6);
 645         if (ret)
 646                 goto err;
 647
 648         /* FSM */
 649         ret = rtl2832_sdr_wr_regs(dev, 0x192, "\x00\xf0\x0f", 3);
 650         if (ret)
 651                 goto err;
 652
 653         /* PID filter */
 654         ret = rtl2832_sdr_wr_regs(dev, 0x061, "\x60", 1);
 655         if (ret)
 656                 goto err;
 657
 658         /* used RF tuner based settings */
 659         switch (pdata->tuner) {
 660         case RTL2832_SDR_TUNER_E4000:
 661                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
 662                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 663                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
 664                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x30", 1);
 665                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xd0", 1);
 666                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 667                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x18", 1);
 668                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 669                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 670                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 671                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 672                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 673                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 674                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 675                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 676                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 677                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
 678                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 679                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 680                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 681                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xd4", 1);
 682                 ret = rtl2832_sdr_wr_regs(dev, 0x1e5, "\xf0", 1);
 683                 ret = rtl2832_sdr_wr_regs(dev, 0x1d9, "\x00", 1);
 684                 ret = rtl2832_sdr_wr_regs(dev, 0x1db, "\x00", 1);
 685                 ret = rtl2832_sdr_wr_regs(dev, 0x1dd, "\x14", 1);
 686                 ret = rtl2832_sdr_wr_regs(dev, 0x1de, "\xec", 1);
 687                 ret = rtl2832_sdr_wr_regs(dev, 0x1d8, "\x0c", 1);
 688                 ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
 689                 ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
 690                 ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x83", 1);
 691                 ret = rtl2832_sdr_wr_regs(dev, 0x010, "\x49", 1);
 692                 ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x87", 1);
 693                 ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x85", 1);
 694                 ret = rtl2832_sdr_wr_regs(dev, 0x013, "\x02", 1);
 695                 break;
 696         case RTL2832_SDR_TUNER_FC0012:
 697         case RTL2832_SDR_TUNER_FC0013:
 698                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
 699                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 700                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
 701                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x2c", 1);
 702                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
 703                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 704                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x16", 1);
 705                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 706                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 707                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 708                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 709                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 710                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 711                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 712                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 713                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 714                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
 715                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 716                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 717                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 718                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xe9\xbf", 2);
 719                 ret = rtl2832_sdr_wr_regs(dev, 0x1e5, "\xf0", 1);
 720                 ret = rtl2832_sdr_wr_regs(dev, 0x1d9, "\x00", 1);
 721                 ret = rtl2832_sdr_wr_regs(dev, 0x1db, "\x00", 1);
 722                 ret = rtl2832_sdr_wr_regs(dev, 0x1dd, "\x11", 1);
 723                 ret = rtl2832_sdr_wr_regs(dev, 0x1de, "\xef", 1);
 724                 ret = rtl2832_sdr_wr_regs(dev, 0x1d8, "\x0c", 1);
 725                 ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
 726                 ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
 727                 break;
 728         case RTL2832_SDR_TUNER_R820T:
 729         case RTL2832_SDR_TUNER_R828D:
 730                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
 731                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 732                 ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x01", 1);
 733                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x80", 1);
 734                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x24", 1);
 735                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
 736                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 737                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x14", 1);
 738                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 739                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 740                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 741                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 742                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 743                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 744                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 745                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 746                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 747                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
 748                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 749                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 750                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 751                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xf4", 1);
 752                 break;
 753         case RTL2832_SDR_TUNER_FC2580:
 754                 ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x39", 1);
 755                 ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
 756                 ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
 757                 ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x2c", 1);
 758                 ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
 759                 ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
 760                 ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x16", 1);
 761                 ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
 762                 ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
 763                 ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
 764                 ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
 765                 ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
 766                 ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
 767                 ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
 768                 ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
 769                 ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
 770                 ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x9c", 1);
 771                 ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
 772                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 773                 ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
 774                 ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xe9\xf4", 2);
 775                 break;
 776         default:
 777                 dev_notice(&pdev->dev, "Unsupported tuner\n");
 778         }
 779
 780         /* software reset */
 781         ret = rtl2832_sdr_wr_reg_mask(dev, 0x101, 0x04, 0x04);
 782         if (ret)
 783                 goto err;
 784
 785         ret = rtl2832_sdr_wr_reg_mask(dev, 0x101, 0x00, 0x04);
 786         if (ret)
 787                 goto err;
 788 err:
 789         return ret;
 790 };
 791
 792 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 793 {
 794         struct platform_device *pdev = dev->pdev;
 795         int ret;
 796
 797         dev_dbg(&pdev->dev, "\n");
 798
 799         /* PID filter */
 800         ret = rtl2832_sdr_wr_regs(dev, 0x061, "\xe0", 1);
 801         if (ret)
 802                 goto err;
 803
 804         /* mode */
 805         ret = rtl2832_sdr_wr_regs(dev, 0x019, "\x20", 1);
 806         if (ret)
 807                 goto err;
 808
 809         ret = rtl2832_sdr_wr_regs(dev, 0x017, "\x11\x10", 2);
 810         if (ret)
 811                 goto err;
 812
 813         /* FSM */
 814         ret = rtl2832_sdr_wr_regs(dev, 0x192, "\x00\x0f\xff", 3);
 815         if (ret)
 816                 goto err;
 817
 818         ret = rtl2832_sdr_wr_regs(dev, 0x13e, "\x40\x00", 2);
 819         if (ret)
 820                 goto err;
 821
 822         ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x06\x3f\xce\xcc", 4);
 823         if (ret)
 824                 goto err;
 825 err:
 826         return;
 827 };
 828
 829 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 830 {
 831         struct platform_device *pdev = dev->pdev;
 832         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 833         struct dvb_frontend *fe = pdata->dvb_frontend;
 834         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 835         struct v4l2_ctrl *bandwidth_auto;
 836         struct v4l2_ctrl *bandwidth;
 837
 838         /*
 839          * tuner RF (Hz)
 840          */
 841         if (dev->f_tuner == 0)
 842                 return 0;
 843
 844         /*
 845          * bandwidth (Hz)
 846          */
 847         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 848                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 849         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 850         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 851                 c->bandwidth_hz = dev->f_adc;
 852                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 853         } else {
 854                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 855         }
 856
 857         c->frequency = dev->f_tuner;
 858         c->delivery_system = SYS_DVBT;
 859
 860         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 861                 c->frequency, c->bandwidth_hz);
 862
 863         if (!test_bit(POWER_ON, &dev->flags))
 864                 return 0;
 865
 866         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 867                 if (fe->ops.tuner_ops.set_params)
 868                         fe->ops.tuner_ops.set_params(fe);
 869         }
 870
 871         return 0;
 872 };
 873
 874 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 875 {
 876         struct platform_device *pdev = dev->pdev;
 877         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 878         struct dvb_frontend *fe = pdata->dvb_frontend;
 879
 880         dev_dbg(&pdev->dev, "\n");
 881
 882         if (fe->ops.tuner_ops.init)
 883                 fe->ops.tuner_ops.init(fe);
 884
 885         return 0;
 886 };
 887
 888 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 889 {
 890         struct platform_device *pdev = dev->pdev;
 891         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 892         struct dvb_frontend *fe = pdata->dvb_frontend;
 893
 894         dev_dbg(&pdev->dev, "\n");
 895
 896         if (fe->ops.tuner_ops.sleep)
 897                 fe->ops.tuner_ops.sleep(fe);
 898
 899         return;
 900 };
 901
 902 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 903 {
 904         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 905         struct platform_device *pdev = dev->pdev;
 906         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 907         struct dvb_usb_device *d = pdata->dvb_usb_device;
 908         int ret;
 909
 910         dev_dbg(&pdev->dev, "\n");
 911
 912         if (!dev->udev)
 913                 return -ENODEV;
 914
 915         if (mutex_lock_interruptible(&dev->v4l2_lock))
 916                 return -ERESTARTSYS;
 917
 918         if (d->props->power_ctrl)
 919                 d->props->power_ctrl(d, 1);
 920
 921         /* enable ADC */
 922         if (d->props->frontend_ctrl)
 923                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 924
 925         set_bit(POWER_ON, &dev->flags);
 926
 927         /* wake-up tuner */
 928         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 929                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 930         else
 931                 ret = rtl2832_sdr_set_tuner(dev);
 932         if (ret)
 933                 goto err;
 934
 935         ret = rtl2832_sdr_set_tuner_freq(dev);
 936         if (ret)
 937                 goto err;
 938
 939         ret = rtl2832_sdr_set_adc(dev);
 940         if (ret)
 941                 goto err;
 942
 943         ret = rtl2832_sdr_alloc_stream_bufs(dev);
 944         if (ret)
 945                 goto err;
 946
 947         ret = rtl2832_sdr_alloc_urbs(dev);
 948         if (ret)
 949                 goto err;
 950
 951         dev->sequence = 0;
 952
 953         ret = rtl2832_sdr_submit_urbs(dev);
 954         if (ret)
 955                 goto err;
 956
 957 err:
 958         mutex_unlock(&dev->v4l2_lock);
 959
 960         return ret;
 961 }
 962
 963 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 964 {
 965         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 966         struct platform_device *pdev = dev->pdev;
 967         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 968         struct dvb_usb_device *d = pdata->dvb_usb_device;
 969
 970         dev_dbg(&pdev->dev, "\n");
 971
 972         mutex_lock(&dev->v4l2_lock);
 973
 974         rtl2832_sdr_kill_urbs(dev);
 975         rtl2832_sdr_free_urbs(dev);
 976         rtl2832_sdr_free_stream_bufs(dev);
 977         rtl2832_sdr_cleanup_queued_bufs(dev);
 978         rtl2832_sdr_unset_adc(dev);
 979
 980         /* sleep tuner */
 981         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 982                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 983         else
 984                 rtl2832_sdr_unset_tuner(dev);
 985
 986         clear_bit(POWER_ON, &dev->flags);
 987
 988         /* disable ADC */
 989         if (d->props->frontend_ctrl)
 990                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 991
 992         if (d->props->power_ctrl)
 993                 d->props->power_ctrl(d, 0);
 994
 995         mutex_unlock(&dev->v4l2_lock);
 996 }
 997
 998 static struct vb2_ops rtl2832_sdr_vb2_ops = {
 999         .queue_setup            = rtl2832_sdr_queue_setup,
1000         .buf_prepare            = rtl2832_sdr_buf_prepare,
1001         .buf_queue              = rtl2832_sdr_buf_queue,
1002         .start_streaming        = rtl2832_sdr_start_streaming,
1003         .stop_streaming         = rtl2832_sdr_stop_streaming,
1004         .wait_prepare           = vb2_ops_wait_prepare,
1005         .wait_finish            = vb2_ops_wait_finish,
1006 };
1007
1008 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
1009                 struct v4l2_tuner *v)
1010 {
1011         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1012         struct platform_device *pdev = dev->pdev;
1013         int ret;
1014
1015         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
1016
1017         if (v->index == 0) {
1018                 strlcpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
1019                 v->type = V4L2_TUNER_ADC;
1020                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1021                 v->rangelow =   300000;
1022                 v->rangehigh = 3200000;
1023                 ret = 0;
1024         } else if (v->index == 1 &&
1025                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
1026                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
1027         } else if (v->index == 1) {
1028                 strlcpy(v->name, "RF: <unknown>", sizeof(v->name));
1029                 v->type = V4L2_TUNER_RF;
1030                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
1031                 v->rangelow =    50000000;
1032                 v->rangehigh = 2000000000;
1033                 ret = 0;
1034         } else {
1035                 ret = -EINVAL;
1036         }
1037         return ret;
1038 }
1039
1040 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
1041                 const struct v4l2_tuner *v)
1042 {
1043         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1044         struct platform_device *pdev = dev->pdev;
1045         int ret;
1046
1047         dev_dbg(&pdev->dev, "\n");
1048
1049         if (v->index == 0) {
1050                 ret = 0;
1051         } else if (v->index == 1 &&
1052                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
1053                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
1054         } else if (v->index == 1) {
1055                 ret = 0;
1056         } else {
1057                 ret = -EINVAL;
1058         }
1059         return ret;
1060 }
1061
1062 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1063                 struct v4l2_frequency_band *band)
1064 {
1065         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1066         struct platform_device *pdev = dev->pdev;
1067         int ret;
1068
1069         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1070                 band->tuner, band->type, band->index);
1071
1072         if (band->tuner == 0) {
1073                 if (band->index >= ARRAY_SIZE(bands_adc))
1074                         return -EINVAL;
1075
1076                 *band = bands_adc[band->index];
1077                 ret = 0;
1078         } else if (band->tuner == 1 &&
1079                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1080                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1081         } else if (band->tuner == 1) {
1082                 if (band->index >= ARRAY_SIZE(bands_fm))
1083                         return -EINVAL;
1084
1085                 *band = bands_fm[band->index];
1086                 ret = 0;
1087         } else {
1088                 ret = -EINVAL;
1089         }
1090         return ret;
1091 }
1092
1093 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1094                 struct v4l2_frequency *f)
1095 {
1096         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1097         struct platform_device *pdev = dev->pdev;
1098         int ret;
1099
1100         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1101
1102         if (f->tuner == 0) {
1103                 f->frequency = dev->f_adc;
1104                 f->type = V4L2_TUNER_ADC;
1105                 ret = 0;
1106         } else if (f->tuner == 1 &&
1107                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1108                 f->type = V4L2_TUNER_RF;
1109                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1110         } else if (f->tuner == 1) {
1111                 f->frequency = dev->f_tuner;
1112                 f->type = V4L2_TUNER_RF;
1113                 ret = 0;
1114         } else {
1115                 ret = -EINVAL;
1116         }
1117         return ret;
1118 }
1119
1120 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1121                 const struct v4l2_frequency *f)
1122 {
1123         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1124         struct platform_device *pdev = dev->pdev;
1125         int ret, band;
1126
1127         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1128                 f->tuner, f->type, f->frequency);
1129
1130         /* ADC band midpoints */
1131         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1132         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1133
1134         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1135                 if (f->frequency < BAND_ADC_0)
1136                         band = 0;
1137                 else if (f->frequency < BAND_ADC_1)
1138                         band = 1;
1139                 else
1140                         band = 2;
1141
1142                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1143                                      bands_adc[band].rangelow,
1144                                      bands_adc[band].rangehigh);
1145
1146                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1147                 ret = rtl2832_sdr_set_adc(dev);
1148         } else if (f->tuner == 1 &&
1149                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1150                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1151         } else if (f->tuner == 1) {
1152                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1153                                 bands_fm[0].rangelow,
1154                                 bands_fm[0].rangehigh);
1155                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1156
1157                 ret = rtl2832_sdr_set_tuner_freq(dev);
1158         } else {
1159                 ret = -EINVAL;
1160         }
1161         return ret;
1162 }
1163
1164 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1165                 struct v4l2_fmtdesc *f)
1166 {
1167         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1168         struct platform_device *pdev = dev->pdev;
1169
1170         dev_dbg(&pdev->dev, "\n");
1171
1172         if (f->index >= dev->num_formats)
1173                 return -EINVAL;
1174
1175         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
1176         f->pixelformat = formats[f->index].pixelformat;
1177
1178         return 0;
1179 }
1180
1181 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1182                 struct v4l2_format *f)
1183 {
1184         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1185         struct platform_device *pdev = dev->pdev;
1186
1187         dev_dbg(&pdev->dev, "\n");
1188
1189         f->fmt.sdr.pixelformat = dev->pixelformat;
1190         f->fmt.sdr.buffersize = dev->buffersize;
1191
1192         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1193
1194         return 0;
1195 }
1196
1197 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1198                 struct v4l2_format *f)
1199 {
1200         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1201         struct platform_device *pdev = dev->pdev;
1202         struct vb2_queue *q = &dev->vb_queue;
1203         int i;
1204
1205         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1206                 (char *)&f->fmt.sdr.pixelformat);
1207
1208         if (vb2_is_busy(q))
1209                 return -EBUSY;
1210
1211         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1212         for (i = 0; i < dev->num_formats; i++) {
1213                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1214                         dev->pixelformat = formats[i].pixelformat;
1215                         dev->buffersize = formats[i].buffersize;
1216                         f->fmt.sdr.buffersize = formats[i].buffersize;
1217                         return 0;
1218                 }
1219         }
1220
1221         dev->pixelformat = formats[0].pixelformat;
1222         dev->buffersize = formats[0].buffersize;
1223         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1224         f->fmt.sdr.buffersize = formats[0].buffersize;
1225
1226         return 0;
1227 }
1228
1229 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1230                 struct v4l2_format *f)
1231 {
1232         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1233         struct platform_device *pdev = dev->pdev;
1234         int i;
1235
1236         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1237                 (char *)&f->fmt.sdr.pixelformat);
1238
1239         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1240         for (i = 0; i < dev->num_formats; i++) {
1241                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1242                         f->fmt.sdr.buffersize = formats[i].buffersize;
1243                         return 0;
1244                 }
1245         }
1246
1247         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1248         f->fmt.sdr.buffersize = formats[0].buffersize;
1249
1250         return 0;
1251 }
1252
1253 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1254         .vidioc_querycap          = rtl2832_sdr_querycap,
1255
1256         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1257         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1258         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1259         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1260
1261         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1262         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1263         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1264         .vidioc_querybuf          = vb2_ioctl_querybuf,
1265         .vidioc_qbuf              = vb2_ioctl_qbuf,
1266         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1267
1268         .vidioc_streamon          = vb2_ioctl_streamon,
1269         .vidioc_streamoff         = vb2_ioctl_streamoff,
1270
1271         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1272         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1273
1274         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1275         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1276         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1277
1278         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1279         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1280         .vidioc_log_status        = v4l2_ctrl_log_status,
1281 };
1282
1283 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1284         .owner                    = THIS_MODULE,
1285         .open                     = v4l2_fh_open,
1286         .release                  = vb2_fop_release,
1287         .read                     = vb2_fop_read,
1288         .poll                     = vb2_fop_poll,
1289         .mmap                     = vb2_fop_mmap,
1290         .unlocked_ioctl           = video_ioctl2,
1291 };
1292
1293 static struct video_device rtl2832_sdr_template = {
1294         .name                     = "Realtek RTL2832 SDR",
1295         .release                  = video_device_release_empty,
1296         .fops                     = &rtl2832_sdr_fops,
1297         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1298 };
1299
1300 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1301 {
1302         struct rtl2832_sdr_dev *dev =
1303                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1304                                         hdl);
1305         struct platform_device *pdev = dev->pdev;
1306         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1307         struct dvb_frontend *fe = pdata->dvb_frontend;
1308         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1309         int ret;
1310
1311         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1312                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1313                 ctrl->step);
1314
1315         switch (ctrl->id) {
1316         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1317         case V4L2_CID_RF_TUNER_BANDWIDTH:
1318                 /* TODO: these controls should be moved to tuner drivers */
1319                 if (dev->bandwidth_auto->val) {
1320                         /* Round towards the closest legal value */
1321                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1322                         u32 offset;
1323
1324                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1325                                       dev->bandwidth->maximum);
1326                         offset = val - dev->bandwidth->minimum;
1327                         offset = dev->bandwidth->step *
1328                                 div_u64(offset, dev->bandwidth->step);
1329                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1330                 }
1331                 c->bandwidth_hz = dev->bandwidth->val;
1332
1333                 if (!test_bit(POWER_ON, &dev->flags))
1334                         return 0;
1335
1336                 if (fe->ops.tuner_ops.set_params)
1337                         ret = fe->ops.tuner_ops.set_params(fe);
1338                 else
1339                         ret = 0;
1340                 break;
1341         default:
1342                 ret = -EINVAL;
1343         }
1344
1345         return ret;
1346 }
1347
1348 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1349         .s_ctrl = rtl2832_sdr_s_ctrl,
1350 };
1351
1352 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1353 {
1354         struct rtl2832_sdr_dev *dev =
1355                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1356         struct platform_device *pdev = dev->pdev;
1357
1358         dev_dbg(&pdev->dev, "\n");
1359
1360         v4l2_ctrl_handler_free(&dev->hdl);
1361         v4l2_device_unregister(&dev->v4l2_dev);
1362         kfree(dev);
1363 }
1364
1365 /* Platform driver interface */
1366 static int rtl2832_sdr_probe(struct platform_device *pdev)
1367 {
1368         struct rtl2832_sdr_dev *dev;
1369         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1370         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1371         struct v4l2_subdev *subdev;
1372         int ret;
1373
1374         dev_dbg(&pdev->dev, "\n");
1375
1376         if (!pdata) {
1377                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1378                 ret = -EINVAL;
1379                 goto err;
1380         }
1381         if (!pdev->dev.parent->driver) {
1382                 dev_dbg(&pdev->dev, "No parent device\n");
1383                 ret = -EINVAL;
1384                 goto err;
1385         }
1386         /* try to refcount host drv since we are the consumer */
1387         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1388                 dev_err(&pdev->dev, "Refcount fail");
1389                 ret = -EINVAL;
1390                 goto err;
1391         }
1392         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1393         if (dev == NULL) {
1394                 ret = -ENOMEM;
1395                 goto err_module_put;
1396         }
1397
1398         /* setup the state */
1399         subdev = pdata->v4l2_subdev;
1400         dev->v4l2_subdev = pdata->v4l2_subdev;
1401         dev->pdev = pdev;
1402         dev->udev = pdata->dvb_usb_device->udev;
1403         dev->f_adc = bands_adc[0].rangelow;
1404         dev->f_tuner = bands_fm[0].rangelow;
1405         dev->pixelformat = formats[0].pixelformat;
1406         dev->buffersize = formats[0].buffersize;
1407         dev->num_formats = NUM_FORMATS;
1408         if (!rtl2832_sdr_emulated_fmt)
1409                 dev->num_formats -= 1;
1410
1411         mutex_init(&dev->v4l2_lock);
1412         mutex_init(&dev->vb_queue_lock);
1413         spin_lock_init(&dev->queued_bufs_lock);
1414         INIT_LIST_HEAD(&dev->queued_bufs);
1415
1416         /* Init videobuf2 queue structure */
1417         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1418         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1419         dev->vb_queue.drv_priv = dev;
1420         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1421         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1422         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1423         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1424         ret = vb2_queue_init(&dev->vb_queue);
1425         if (ret) {
1426                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1427                 goto err_kfree;
1428         }
1429
1430         /* Register controls */
1431         switch (pdata->tuner) {
1432         case RTL2832_SDR_TUNER_E4000:
1433                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1434                 if (subdev)
1435                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler, NULL);
1436                 break;
1437         case RTL2832_SDR_TUNER_R820T:
1438         case RTL2832_SDR_TUNER_R828D:
1439                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1440                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1441                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1442                                                         0, 1, 1, 1);
1443                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1444                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1445                                                    0, 8000000, 100000, 0);
1446                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1447                 break;
1448         case RTL2832_SDR_TUNER_FC0012:
1449         case RTL2832_SDR_TUNER_FC0013:
1450                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1451                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1452                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1453                                                         0, 1, 1, 1);
1454                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1455                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1456                                                    6000000, 8000000, 1000000,
1457                                                    6000000);
1458                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1459                 break;
1460         case RTL2832_SDR_TUNER_FC2580:
1461                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1462                 if (subdev)
1463                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1464                                               NULL);
1465                 break;
1466         default:
1467                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1468                 dev_err(&pdev->dev, "Unsupported tuner\n");
1469                 goto err_v4l2_ctrl_handler_free;
1470         }
1471         if (dev->hdl.error) {
1472                 ret = dev->hdl.error;
1473                 dev_err(&pdev->dev, "Could not initialize controls\n");
1474                 goto err_v4l2_ctrl_handler_free;
1475         }
1476
1477         /* Init video_device structure */
1478         dev->vdev = rtl2832_sdr_template;
1479         dev->vdev.queue = &dev->vb_queue;
1480         dev->vdev.queue->lock = &dev->vb_queue_lock;
1481         video_set_drvdata(&dev->vdev, dev);
1482
1483         /* Register the v4l2_device structure */
1484         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1485         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1486         if (ret) {
1487                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1488                 goto err_v4l2_ctrl_handler_free;
1489         }
1490
1491         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1492         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1493         dev->vdev.lock = &dev->v4l2_lock;
1494         dev->vdev.vfl_dir = VFL_DIR_RX;
1495
1496         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1497         if (ret) {
1498                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1499                         ret);
1500                 goto err_v4l2_device_unregister;
1501         }
1502         dev_info(&pdev->dev, "Registered as %s\n",
1503                  video_device_node_name(&dev->vdev));
1504         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1505         dev_notice(&pdev->dev,
1506                    "SDR API is still slightly experimental and functionality changes may follow\n");
1507         platform_set_drvdata(pdev, dev);
1508         return 0;
1509 err_v4l2_device_unregister:
1510         v4l2_device_unregister(&dev->v4l2_dev);
1511 err_v4l2_ctrl_handler_free:
1512         v4l2_ctrl_handler_free(&dev->hdl);
1513 err_kfree:
1514         kfree(dev);
1515 err_module_put:
1516         module_put(pdev->dev.parent->driver->owner);
1517 err:
1518         return ret;
1519 }
1520
1521 static int rtl2832_sdr_remove(struct platform_device *pdev)
1522 {
1523         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1524
1525         dev_dbg(&pdev->dev, "\n");
1526
1527         mutex_lock(&dev->vb_queue_lock);
1528         mutex_lock(&dev->v4l2_lock);
1529         /* No need to keep the urbs around after disconnection */
1530         dev->udev = NULL;
1531         v4l2_device_disconnect(&dev->v4l2_dev);
1532         video_unregister_device(&dev->vdev);
1533         mutex_unlock(&dev->v4l2_lock);
1534         mutex_unlock(&dev->vb_queue_lock);
1535         v4l2_device_put(&dev->v4l2_dev);
1536         module_put(pdev->dev.parent->driver->owner);
1537
1538         return 0;
1539 }
1540
1541 static struct platform_driver rtl2832_sdr_driver = {
1542         .driver = {
1543                 .name   = "rtl2832_sdr",
1544         },
1545         .probe          = rtl2832_sdr_probe,
1546         .remove         = rtl2832_sdr_remove,
1547 };
1548 module_platform_driver(rtl2832_sdr_driver);
1549
1550 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1551 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1552 MODULE_LICENSE("GPL");