rtl2832_sdr.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Realtek RTL2832U SDR driver
   4 *
   5 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
   6 *
   7 * GNU Radio plugin "gr-kernel" for device usage will be on:
   8 * https://git.linuxtv.org/anttip/gr-kernel.git
   9 */
  10
  11#include "rtl2832_sdr.h"
  12#include "dvb_usb.h"
  13
  14#include <media/v4l2-device.h>
  15#include <media/v4l2-ioctl.h>
  16#include <media/v4l2-ctrls.h>
  17#include <media/v4l2-event.h>
  18#include <media/videobuf2-v4l2.h>
  19#include <media/videobuf2-vmalloc.h>
  20
  21#include <linux/platform_device.h>
  22#include <linux/jiffies.h>
  23#include <linux/math64.h>
  24#include <linux/regmap.h>
  25
  26static bool rtl2832_sdr_emulated_fmt;
  27module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
  28MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
  29
  30/* Original macro does not contain enough null pointer checks for our need */
  31#define V4L2_SUBDEV_HAS_OP(sd, o, f) \
  32	((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
  33
  34#define MAX_BULK_BUFS            (10)
  35#define BULK_BUFFER_SIZE         (128 * 512)
  36
  37static const struct v4l2_frequency_band bands_adc[] = {
  38	{
  39		.tuner = 0,
  40		.type = V4L2_TUNER_ADC,
  41		.index = 0,
  42		.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  43		.rangelow   =  300000,
  44		.rangehigh  =  300000,
  45	},
  46	{
  47		.tuner = 0,
  48		.type = V4L2_TUNER_ADC,
  49		.index = 1,
  50		.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  51		.rangelow   =  900001,
  52		.rangehigh  = 2800000,
  53	},
  54	{
  55		.tuner = 0,
  56		.type = V4L2_TUNER_ADC,
  57		.index = 2,
  58		.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  59		.rangelow   = 3200000,
  60		.rangehigh  = 3200000,
  61	},
  62};
  63
  64static const struct v4l2_frequency_band bands_fm[] = {
  65	{
  66		.tuner = 1,
  67		.type = V4L2_TUNER_RF,
  68		.index = 0,
  69		.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
  70		.rangelow   =    50000000,
  71		.rangehigh  =  2000000000,
  72	},
  73};
  74
  75/* stream formats */
  76struct rtl2832_sdr_format {
  77	char	*name;
  78	u32	pixelformat;
  79	u32	buffersize;
  80};
  81
  82static struct rtl2832_sdr_format formats[] = {
  83	{
  84		.pixelformat	= V4L2_SDR_FMT_CU8,
  85		.buffersize	= BULK_BUFFER_SIZE,
  86	}, {
  87		.pixelformat	= V4L2_SDR_FMT_CU16LE,
  88		.buffersize	= BULK_BUFFER_SIZE * 2,
  89	},
  90};
  91
  92static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
  93
  94/* intermediate buffers with raw data from the USB device */
  95struct rtl2832_sdr_frame_buf {
  96	/* common v4l buffer stuff -- must be first */
  97	struct vb2_v4l2_buffer vb;
  98	struct list_head list;
  99};
 100
 101struct rtl2832_sdr_dev {
 102#define POWER_ON           0  /* BIT(0) */
 103#define URB_BUF            1  /* BIT(1) */
 104	unsigned long flags;
 105
 106	struct platform_device *pdev;
 107	struct regmap *regmap;
 108
 109	struct video_device vdev;
 110	struct v4l2_device v4l2_dev;
 111	struct v4l2_subdev *v4l2_subdev;
 112
 113	/* videobuf2 queue and queued buffers list */
 114	struct vb2_queue vb_queue;
 115	struct list_head queued_bufs;
 116	spinlock_t queued_bufs_lock; /* Protects queued_bufs */
 117	unsigned sequence;	     /* buffer sequence counter */
 118
 119	/* Note if taking both locks v4l2_lock must always be locked first! */
 120	struct mutex v4l2_lock;      /* Protects everything else */
 121	struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
 122
 123	/* Pointer to our usb_device, will be NULL after unplug */
 124	struct usb_device *udev; /* Both mutexes most be hold when setting! */
 125
 126	unsigned int vb_full; /* vb is full and packets dropped */
 127
 128	struct urb     *urb_list[MAX_BULK_BUFS];
 129	int            buf_num;
 130	unsigned long  buf_size;
 131	u8             *buf_list[MAX_BULK_BUFS];
 132	dma_addr_t     dma_addr[MAX_BULK_BUFS];
 133	int urbs_initialized;
 134	int urbs_submitted;
 135
 136	unsigned int f_adc, f_tuner;
 137	u32 pixelformat;
 138	u32 buffersize;
 139	unsigned int num_formats;
 140
 141	/* Controls */
 142	struct v4l2_ctrl_handler hdl;
 143	struct v4l2_ctrl *bandwidth_auto;
 144	struct v4l2_ctrl *bandwidth;
 145
 146	/* for sample rate calc */
 147	unsigned int sample;
 148	unsigned int sample_measured;
 149	unsigned long jiffies_next;
 150};
 151
 152/* Private functions */
 153static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
 154		struct rtl2832_sdr_dev *dev)
 155{
 156	unsigned long flags;
 157	struct rtl2832_sdr_frame_buf *buf = NULL;
 158
 159	spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 160	if (list_empty(&dev->queued_bufs))
 161		goto leave;
 162
 163	buf = list_entry(dev->queued_bufs.next,
 164			struct rtl2832_sdr_frame_buf, list);
 165	list_del(&buf->list);
 166leave:
 167	spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 168	return buf;
 169}
 170
 171static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
 172		void *dst, const u8 *src, unsigned int src_len)
 173{
 174	struct platform_device *pdev = dev->pdev;
 175	unsigned int dst_len;
 176
 177	if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
 178		/* native stream, no need to convert */
 179		memcpy(dst, src, src_len);
 180		dst_len = src_len;
 181	} else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
 182		/* convert u8 to u16 */
 183		unsigned int i;
 184		u16 *u16dst = dst;
 185
 186		for (i = 0; i < src_len; i++)
 187			*u16dst++ = (src[i] << 8) | (src[i] >> 0);
 188		dst_len = 2 * src_len;
 189	} else {
 190		dst_len = 0;
 191	}
 192
 193	/* calculate sample rate and output it in 10 seconds intervals */
 194	if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
 195		#define MSECS 10000UL
 196		unsigned int msecs = jiffies_to_msecs(jiffies -
 197				dev->jiffies_next + msecs_to_jiffies(MSECS));
 198		unsigned int samples = dev->sample - dev->sample_measured;
 199
 200		dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
 201		dev->sample_measured = dev->sample;
 202		dev_dbg(&pdev->dev,
 203			"slen=%u samples=%u msecs=%u sample rate=%lu\n",
 204			src_len, samples, msecs, samples * 1000UL / msecs);
 205	}
 206
 207	/* total number of I+Q pairs */
 208	dev->sample += src_len / 2;
 209
 210	return dst_len;
 211}
 212
 213/*
 214 * This gets called for the bulk stream pipe. This is done in interrupt
 215 * time, so it has to be fast, not crash, and not stall. Neat.
 216 */
 217static void rtl2832_sdr_urb_complete(struct urb *urb)
 218{
 219	struct rtl2832_sdr_dev *dev = urb->context;
 220	struct platform_device *pdev = dev->pdev;
 221	struct rtl2832_sdr_frame_buf *fbuf;
 222
 223	dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
 224			    urb->status, urb->actual_length,
 225			    urb->transfer_buffer_length, urb->error_count);
 226
 227	switch (urb->status) {
 228	case 0:             /* success */
 229	case -ETIMEDOUT:    /* NAK */
 230		break;
 231	case -ECONNRESET:   /* kill */
 232	case -ENOENT:
 233	case -ESHUTDOWN:
 234		return;
 235	default:            /* error */
 236		dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
 237		break;
 238	}
 239
 240	if (likely(urb->actual_length > 0)) {
 241		void *ptr;
 242		unsigned int len;
 243		/* get free framebuffer */
 244		fbuf = rtl2832_sdr_get_next_fill_buf(dev);
 245		if (unlikely(fbuf == NULL)) {
 246			dev->vb_full++;
 247			dev_notice_ratelimited(&pdev->dev,
 248					       "video buffer is full, %d packets dropped\n",
 249					       dev->vb_full);
 250			goto skip;
 251		}
 252
 253		/* fill framebuffer */
 254		ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
 255		len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
 256				urb->actual_length);
 257		vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
 258		fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
 259		fbuf->vb.sequence = dev->sequence++;
 260		vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 261	}
 262skip:
 263	usb_submit_urb(urb, GFP_ATOMIC);
 264}
 265
 266static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
 267{
 268	struct platform_device *pdev = dev->pdev;
 269	int i;
 270
 271	for (i = dev->urbs_submitted - 1; i >= 0; i--) {
 272		dev_dbg(&pdev->dev, "kill urb=%d\n", i);
 273		/* stop the URB */
 274		usb_kill_urb(dev->urb_list[i]);
 275	}
 276	dev->urbs_submitted = 0;
 277
 278	return 0;
 279}
 280
 281static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
 282{
 283	struct platform_device *pdev = dev->pdev;
 284	int i, ret;
 285
 286	for (i = 0; i < dev->urbs_initialized; i++) {
 287		dev_dbg(&pdev->dev, "submit urb=%d\n", i);
 288		ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL);
 289		if (ret) {
 290			dev_err(&pdev->dev,
 291				"Could not submit urb no. %d - get them all back\n",
 292				i);
 293			rtl2832_sdr_kill_urbs(dev);
 294			return ret;
 295		}
 296		dev->urbs_submitted++;
 297	}
 298
 299	return 0;
 300}
 301
 302static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
 303{
 304	struct platform_device *pdev = dev->pdev;
 305
 306	if (test_bit(URB_BUF, &dev->flags)) {
 307		while (dev->buf_num) {
 308			dev->buf_num--;
 309			dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
 310			usb_free_coherent(dev->udev, dev->buf_size,
 311					  dev->buf_list[dev->buf_num],
 312					  dev->dma_addr[dev->buf_num]);
 313		}
 314	}
 315	clear_bit(URB_BUF, &dev->flags);
 316
 317	return 0;
 318}
 319
 320static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
 321{
 322	struct platform_device *pdev = dev->pdev;
 323
 324	dev->buf_num = 0;
 325	dev->buf_size = BULK_BUFFER_SIZE;
 326
 327	dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
 328		MAX_BULK_BUFS * BULK_BUFFER_SIZE);
 329
 330	for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
 331		dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
 332				BULK_BUFFER_SIZE, GFP_KERNEL,
 333				&dev->dma_addr[dev->buf_num]);
 334		if (!dev->buf_list[dev->buf_num]) {
 335			dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
 336				dev->buf_num);
 337			rtl2832_sdr_free_stream_bufs(dev);
 338			return -ENOMEM;
 339		}
 340
 341		dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
 342			dev->buf_num, dev->buf_list[dev->buf_num],
 343			(long long)dev->dma_addr[dev->buf_num]);
 344		set_bit(URB_BUF, &dev->flags);
 345	}
 346
 347	return 0;
 348}
 349
 350static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
 351{
 352	struct platform_device *pdev = dev->pdev;
 353	int i;
 354
 355	rtl2832_sdr_kill_urbs(dev);
 356
 357	for (i = dev->urbs_initialized - 1; i >= 0; i--) {
 358		if (dev->urb_list[i]) {
 359			dev_dbg(&pdev->dev, "free urb=%d\n", i);
 360			/* free the URBs */
 361			usb_free_urb(dev->urb_list[i]);
 362		}
 363	}
 364	dev->urbs_initialized = 0;
 365
 366	return 0;
 367}
 368
 369static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
 370{
 371	struct platform_device *pdev = dev->pdev;
 372	int i, j;
 373
 374	/* allocate the URBs */
 375	for (i = 0; i < MAX_BULK_BUFS; i++) {
 376		dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
 377		dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);
 378		if (!dev->urb_list[i]) {
 379			for (j = 0; j < i; j++) {
 380				usb_free_urb(dev->urb_list[j]);
 381				dev->urb_list[j] = NULL;
 382			}
 383			dev->urbs_initialized = 0;
 384			return -ENOMEM;
 385		}
 386		usb_fill_bulk_urb(dev->urb_list[i],
 387				dev->udev,
 388				usb_rcvbulkpipe(dev->udev, 0x81),
 389				dev->buf_list[i],
 390				BULK_BUFFER_SIZE,
 391				rtl2832_sdr_urb_complete, dev);
 392
 393		dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 394		dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
 395		dev->urbs_initialized++;
 396	}
 397
 398	return 0;
 399}
 400
 401/* Must be called with vb_queue_lock hold */
 402static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
 403{
 404	struct platform_device *pdev = dev->pdev;
 405	unsigned long flags;
 406
 407	dev_dbg(&pdev->dev, "\n");
 408
 409	spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 410	while (!list_empty(&dev->queued_bufs)) {
 411		struct rtl2832_sdr_frame_buf *buf;
 412
 413		buf = list_entry(dev->queued_bufs.next,
 414				struct rtl2832_sdr_frame_buf, list);
 415		list_del(&buf->list);
 416		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 417	}
 418	spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 419}
 420
 421static int rtl2832_sdr_querycap(struct file *file, void *fh,
 422		struct v4l2_capability *cap)
 423{
 424	struct rtl2832_sdr_dev *dev = video_drvdata(file);
 425	struct platform_device *pdev = dev->pdev;
 426
 427	dev_dbg(&pdev->dev, "\n");
 428
 429	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 430	strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
 431	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
 432	return 0;
 433}
 434
 435/* Videobuf2 operations */
 436static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
 437		unsigned int *nbuffers,
 438		unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
 439{
 440	struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 441	struct platform_device *pdev = dev->pdev;
 442	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 443
 444	dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
 445
 446	/* Need at least 8 buffers */
 447	if (q_num_bufs + *nbuffers < 8)
 448		*nbuffers = 8 - q_num_bufs;
 449	*nplanes = 1;
 450	sizes[0] = PAGE_ALIGN(dev->buffersize);
 451	dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
 452	return 0;
 453}
 454
 455static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
 456{
 457	struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 458
 459	/* Don't allow queueing new buffers after device disconnection */
 460	if (!dev->udev)
 461		return -ENODEV;
 462
 463	return 0;
 464}
 465
 466static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
 467{
 468	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 469	struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 470	struct rtl2832_sdr_frame_buf *buf =
 471			container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
 472	unsigned long flags;
 473
 474	/* Check the device has not disconnected between prep and queuing */
 475	if (!dev->udev) {
 476		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 477		return;
 478	}
 479
 480	spin_lock_irqsave(&dev->queued_bufs_lock, flags);
 481	list_add_tail(&buf->list, &dev->queued_bufs);
 482	spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
 483}
 484
 485static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
 486{
 487	struct platform_device *pdev = dev->pdev;
 488	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 489	struct dvb_frontend *fe = pdata->dvb_frontend;
 490	int ret;
 491	unsigned int f_sr, f_if;
 492	u8 buf[4], u8tmp1, u8tmp2;
 493	u64 u64tmp;
 494	u32 u32tmp;
 495
 496	dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
 497
 498	if (!test_bit(POWER_ON, &dev->flags))
 499		return 0;
 500
 501	if (dev->f_adc == 0)
 502		return 0;
 503
 504	f_sr = dev->f_adc;
 505
 506	ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
 507	if (ret)
 508		goto err;
 509
 510	ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
 511	if (ret)
 512		goto err;
 513
 514	/* get IF from tuner */
 515	if (fe->ops.tuner_ops.get_if_frequency)
 516		ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
 517	else
 518		ret = -EINVAL;
 519
 520	if (ret)
 521		goto err;
 522
 523	/* program IF */
 524	u64tmp = f_if % pdata->clk;
 525	u64tmp *= 0x400000;
 526	u64tmp = div_u64(u64tmp, pdata->clk);
 527	u64tmp = -u64tmp;
 528	u32tmp = u64tmp & 0x3fffff;
 529
 530	dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
 531
 532	buf[0] = (u32tmp >> 16) & 0xff;
 533	buf[1] = (u32tmp >>  8) & 0xff;
 534	buf[2] = (u32tmp >>  0) & 0xff;
 535
 536	ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
 537	if (ret)
 538		goto err;
 539
 540	/* BB / IF mode */
 541	/* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
 542	if (f_if) {
 543		u8tmp1 = 0x1a; /* disable Zero-IF */
 544		u8tmp2 = 0x8d; /* enable ADC I */
 545	} else {
 546		u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
 547		u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
 548	}
 549
 550	ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
 551	if (ret)
 552		goto err;
 553
 554	ret = regmap_write(dev->regmap, 0x008, u8tmp2);
 555	if (ret)
 556		goto err;
 557
 558	ret = regmap_write(dev->regmap, 0x006, 0x80);
 559	if (ret)
 560		goto err;
 561
 562	/* program sampling rate (resampling down) */
 563	u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
 564	u32tmp <<= 2;
 565	buf[0] = (u32tmp >> 24) & 0xff;
 566	buf[1] = (u32tmp >> 16) & 0xff;
 567	buf[2] = (u32tmp >>  8) & 0xff;
 568	buf[3] = (u32tmp >>  0) & 0xff;
 569	ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
 570	if (ret)
 571		goto err;
 572
 573	/* low-pass filter */
 574	ret = regmap_bulk_write(dev->regmap, 0x11c,
 575				"\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
 576				20);
 577	if (ret)
 578		goto err;
 579
 580	ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 581	if (ret)
 582		goto err;
 583
 584	/* mode */
 585	ret = regmap_write(dev->regmap, 0x019, 0x05);
 586	if (ret)
 587		goto err;
 588
 589	ret = regmap_bulk_write(dev->regmap, 0x01a,
 590				"\x1b\x16\x0d\x06\x01\xff", 6);
 591	if (ret)
 592		goto err;
 593
 594	/* FSM */
 595	ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
 596	if (ret)
 597		goto err;
 598
 599	/* PID filter */
 600	ret = regmap_write(dev->regmap, 0x061, 0x60);
 601	if (ret)
 602		goto err;
 603
 604	/* used RF tuner based settings */
 605	switch (pdata->tuner) {
 606	case RTL2832_SDR_TUNER_E4000:
 607		ret = regmap_write(dev->regmap, 0x112, 0x5a);
 608		ret = regmap_write(dev->regmap, 0x102, 0x40);
 609		ret = regmap_write(dev->regmap, 0x103, 0x5a);
 610		ret = regmap_write(dev->regmap, 0x1c7, 0x30);
 611		ret = regmap_write(dev->regmap, 0x104, 0xd0);
 612		ret = regmap_write(dev->regmap, 0x105, 0xbe);
 613		ret = regmap_write(dev->regmap, 0x1c8, 0x18);
 614		ret = regmap_write(dev->regmap, 0x106, 0x35);
 615		ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 616		ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 617		ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 618		ret = regmap_write(dev->regmap, 0x107, 0x40);
 619		ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 620		ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 621		ret = regmap_write(dev->regmap, 0x108, 0x80);
 622		ret = regmap_write(dev->regmap, 0x109, 0x7f);
 623		ret = regmap_write(dev->regmap, 0x10a, 0x80);
 624		ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 625		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 626		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 627		ret = regmap_write(dev->regmap, 0x011, 0xd4);
 628		ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 629		ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 630		ret = regmap_write(dev->regmap, 0x1db, 0x00);
 631		ret = regmap_write(dev->regmap, 0x1dd, 0x14);
 632		ret = regmap_write(dev->regmap, 0x1de, 0xec);
 633		ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 634		ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 635		ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 636		ret = regmap_write(dev->regmap, 0x00d, 0x83);
 637		ret = regmap_write(dev->regmap, 0x010, 0x49);
 638		ret = regmap_write(dev->regmap, 0x00d, 0x87);
 639		ret = regmap_write(dev->regmap, 0x00d, 0x85);
 640		ret = regmap_write(dev->regmap, 0x013, 0x02);
 641		break;
 642	case RTL2832_SDR_TUNER_FC0012:
 643	case RTL2832_SDR_TUNER_FC0013:
 644		ret = regmap_write(dev->regmap, 0x112, 0x5a);
 645		ret = regmap_write(dev->regmap, 0x102, 0x40);
 646		ret = regmap_write(dev->regmap, 0x103, 0x5a);
 647		ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 648		ret = regmap_write(dev->regmap, 0x104, 0xcc);
 649		ret = regmap_write(dev->regmap, 0x105, 0xbe);
 650		ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 651		ret = regmap_write(dev->regmap, 0x106, 0x35);
 652		ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 653		ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 654		ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 655		ret = regmap_write(dev->regmap, 0x107, 0x40);
 656		ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 657		ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 658		ret = regmap_write(dev->regmap, 0x108, 0x80);
 659		ret = regmap_write(dev->regmap, 0x109, 0x7f);
 660		ret = regmap_write(dev->regmap, 0x10a, 0x80);
 661		ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 662		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 663		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 664		ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
 665		ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
 666		ret = regmap_write(dev->regmap, 0x1d9, 0x00);
 667		ret = regmap_write(dev->regmap, 0x1db, 0x00);
 668		ret = regmap_write(dev->regmap, 0x1dd, 0x11);
 669		ret = regmap_write(dev->regmap, 0x1de, 0xef);
 670		ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
 671		ret = regmap_write(dev->regmap, 0x1e6, 0x02);
 672		ret = regmap_write(dev->regmap, 0x1d7, 0x09);
 673		break;
 674	case RTL2832_SDR_TUNER_R820T:
 675	case RTL2832_SDR_TUNER_R828D:
 676		ret = regmap_write(dev->regmap, 0x112, 0x5a);
 677		ret = regmap_write(dev->regmap, 0x102, 0x40);
 678		ret = regmap_write(dev->regmap, 0x115, 0x01);
 679		ret = regmap_write(dev->regmap, 0x103, 0x80);
 680		ret = regmap_write(dev->regmap, 0x1c7, 0x24);
 681		ret = regmap_write(dev->regmap, 0x104, 0xcc);
 682		ret = regmap_write(dev->regmap, 0x105, 0xbe);
 683		ret = regmap_write(dev->regmap, 0x1c8, 0x14);
 684		ret = regmap_write(dev->regmap, 0x106, 0x35);
 685		ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 686		ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 687		ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 688		ret = regmap_write(dev->regmap, 0x107, 0x40);
 689		ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 690		ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 691		ret = regmap_write(dev->regmap, 0x108, 0x80);
 692		ret = regmap_write(dev->regmap, 0x109, 0x7f);
 693		ret = regmap_write(dev->regmap, 0x10a, 0x80);
 694		ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 695		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 696		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 697		ret = regmap_write(dev->regmap, 0x011, 0xf4);
 698		break;
 699	case RTL2832_SDR_TUNER_FC2580:
 700		ret = regmap_write(dev->regmap, 0x112, 0x39);
 701		ret = regmap_write(dev->regmap, 0x102, 0x40);
 702		ret = regmap_write(dev->regmap, 0x103, 0x5a);
 703		ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
 704		ret = regmap_write(dev->regmap, 0x104, 0xcc);
 705		ret = regmap_write(dev->regmap, 0x105, 0xbe);
 706		ret = regmap_write(dev->regmap, 0x1c8, 0x16);
 707		ret = regmap_write(dev->regmap, 0x106, 0x35);
 708		ret = regmap_write(dev->regmap, 0x1c9, 0x21);
 709		ret = regmap_write(dev->regmap, 0x1ca, 0x21);
 710		ret = regmap_write(dev->regmap, 0x1cb, 0x00);
 711		ret = regmap_write(dev->regmap, 0x107, 0x40);
 712		ret = regmap_write(dev->regmap, 0x1cd, 0x10);
 713		ret = regmap_write(dev->regmap, 0x1ce, 0x10);
 714		ret = regmap_write(dev->regmap, 0x108, 0x80);
 715		ret = regmap_write(dev->regmap, 0x109, 0x7f);
 716		ret = regmap_write(dev->regmap, 0x10a, 0x9c);
 717		ret = regmap_write(dev->regmap, 0x10b, 0x7f);
 718		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 719		ret = regmap_write(dev->regmap, 0x00e, 0xfc);
 720		ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
 721		break;
 722	default:
 723		dev_notice(&pdev->dev, "Unsupported tuner\n");
 724	}
 725
 726	/* software reset */
 727	ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
 728	if (ret)
 729		goto err;
 730
 731	ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
 732	if (ret)
 733		goto err;
 734err:
 735	return ret;
 736};
 737
 738static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
 739{
 740	struct platform_device *pdev = dev->pdev;
 741	int ret;
 742
 743	dev_dbg(&pdev->dev, "\n");
 744
 745	/* PID filter */
 746	ret = regmap_write(dev->regmap, 0x061, 0xe0);
 747	if (ret)
 748		goto err;
 749
 750	/* mode */
 751	ret = regmap_write(dev->regmap, 0x019, 0x20);
 752	if (ret)
 753		goto err;
 754
 755	ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
 756	if (ret)
 757		goto err;
 758
 759	/* FSM */
 760	ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
 761	if (ret)
 762		goto err;
 763
 764	ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
 765	if (ret)
 766		goto err;
 767
 768	ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
 769	if (ret)
 770		goto err;
 771err:
 772	return;
 773};
 774
 775static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
 776{
 777	struct platform_device *pdev = dev->pdev;
 778	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 779	struct dvb_frontend *fe = pdata->dvb_frontend;
 780	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 781	struct v4l2_ctrl *bandwidth_auto;
 782	struct v4l2_ctrl *bandwidth;
 783
 784	/*
 785	 * tuner RF (Hz)
 786	 */
 787	if (dev->f_tuner == 0)
 788		return 0;
 789
 790	/*
 791	 * bandwidth (Hz)
 792	 */
 793	bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
 794					V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
 795	bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
 796	if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
 797		c->bandwidth_hz = dev->f_adc;
 798		v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
 799	} else {
 800		c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
 801	}
 802
 803	c->frequency = dev->f_tuner;
 804	c->delivery_system = SYS_DVBT;
 805
 806	dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
 807		c->frequency, c->bandwidth_hz);
 808
 809	if (!test_bit(POWER_ON, &dev->flags))
 810		return 0;
 811
 812	if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
 813		if (fe->ops.tuner_ops.set_params)
 814			fe->ops.tuner_ops.set_params(fe);
 815	}
 816
 817	return 0;
 818};
 819
 820static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
 821{
 822	struct platform_device *pdev = dev->pdev;
 823	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 824	struct dvb_frontend *fe = pdata->dvb_frontend;
 825
 826	dev_dbg(&pdev->dev, "\n");
 827
 828	if (fe->ops.tuner_ops.init)
 829		fe->ops.tuner_ops.init(fe);
 830
 831	return 0;
 832};
 833
 834static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
 835{
 836	struct platform_device *pdev = dev->pdev;
 837	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 838	struct dvb_frontend *fe = pdata->dvb_frontend;
 839
 840	dev_dbg(&pdev->dev, "\n");
 841
 842	if (fe->ops.tuner_ops.sleep)
 843		fe->ops.tuner_ops.sleep(fe);
 844
 845	return;
 846};
 847
 848static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
 849{
 850	struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 851	struct platform_device *pdev = dev->pdev;
 852	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 853	struct dvb_usb_device *d = pdata->dvb_usb_device;
 854	int ret;
 855
 856	dev_dbg(&pdev->dev, "\n");
 857
 858	if (!dev->udev)
 859		return -ENODEV;
 860
 861	if (mutex_lock_interruptible(&dev->v4l2_lock))
 862		return -ERESTARTSYS;
 863
 864	if (d->props->power_ctrl)
 865		d->props->power_ctrl(d, 1);
 866
 867	/* enable ADC */
 868	if (d->props->frontend_ctrl)
 869		d->props->frontend_ctrl(pdata->dvb_frontend, 1);
 870
 871	set_bit(POWER_ON, &dev->flags);
 872
 873	/* wake-up tuner */
 874	if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 875		ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
 876	else
 877		ret = rtl2832_sdr_set_tuner(dev);
 878	if (ret)
 879		goto err;
 880
 881	ret = rtl2832_sdr_set_tuner_freq(dev);
 882	if (ret)
 883		goto err;
 884
 885	ret = rtl2832_sdr_set_adc(dev);
 886	if (ret)
 887		goto err;
 888
 889	ret = rtl2832_sdr_alloc_stream_bufs(dev);
 890	if (ret)
 891		goto err;
 892
 893	ret = rtl2832_sdr_alloc_urbs(dev);
 894	if (ret)
 895		goto err;
 896
 897	dev->sequence = 0;
 898
 899	ret = rtl2832_sdr_submit_urbs(dev);
 900	if (ret)
 901		goto err;
 902
 903err:
 904	mutex_unlock(&dev->v4l2_lock);
 905
 906	return ret;
 907}
 908
 909static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
 910{
 911	struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
 912	struct platform_device *pdev = dev->pdev;
 913	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
 914	struct dvb_usb_device *d = pdata->dvb_usb_device;
 915
 916	dev_dbg(&pdev->dev, "\n");
 917
 918	mutex_lock(&dev->v4l2_lock);
 919
 920	rtl2832_sdr_kill_urbs(dev);
 921	rtl2832_sdr_free_urbs(dev);
 922	rtl2832_sdr_free_stream_bufs(dev);
 923	rtl2832_sdr_cleanup_queued_bufs(dev);
 924	rtl2832_sdr_unset_adc(dev);
 925
 926	/* sleep tuner */
 927	if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
 928		v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
 929	else
 930		rtl2832_sdr_unset_tuner(dev);
 931
 932	clear_bit(POWER_ON, &dev->flags);
 933
 934	/* disable ADC */
 935	if (d->props->frontend_ctrl)
 936		d->props->frontend_ctrl(pdata->dvb_frontend, 0);
 937
 938	if (d->props->power_ctrl)
 939		d->props->power_ctrl(d, 0);
 940
 941	mutex_unlock(&dev->v4l2_lock);
 942}
 943
 944static const struct vb2_ops rtl2832_sdr_vb2_ops = {
 945	.queue_setup            = rtl2832_sdr_queue_setup,
 946	.buf_prepare            = rtl2832_sdr_buf_prepare,
 947	.buf_queue              = rtl2832_sdr_buf_queue,
 948	.start_streaming        = rtl2832_sdr_start_streaming,
 949	.stop_streaming         = rtl2832_sdr_stop_streaming,
 950};
 951
 952static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
 953		struct v4l2_tuner *v)
 954{
 955	struct rtl2832_sdr_dev *dev = video_drvdata(file);
 956	struct platform_device *pdev = dev->pdev;
 957	int ret;
 958
 959	dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
 960
 961	if (v->index == 0) {
 962		strscpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
 963		v->type = V4L2_TUNER_ADC;
 964		v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 965		v->rangelow =   300000;
 966		v->rangehigh = 3200000;
 967		ret = 0;
 968	} else if (v->index == 1 &&
 969		   V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
 970		ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
 971	} else if (v->index == 1) {
 972		strscpy(v->name, "RF: <unknown>", sizeof(v->name));
 973		v->type = V4L2_TUNER_RF;
 974		v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 975		v->rangelow =    50000000;
 976		v->rangehigh = 2000000000;
 977		ret = 0;
 978	} else {
 979		ret = -EINVAL;
 980	}
 981	return ret;
 982}
 983
 984static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
 985		const struct v4l2_tuner *v)
 986{
 987	struct rtl2832_sdr_dev *dev = video_drvdata(file);
 988	struct platform_device *pdev = dev->pdev;
 989	int ret;
 990
 991	dev_dbg(&pdev->dev, "\n");
 992
 993	if (v->index == 0) {
 994		ret = 0;
 995	} else if (v->index == 1 &&
 996		   V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
 997		ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
 998	} else if (v->index == 1) {
 999		ret = 0;
1000	} else {
1001		ret = -EINVAL;
1002	}
1003	return ret;
1004}
1005
1006static 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	int ret;
1012
1013	dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1014		band->tuner, band->type, band->index);
1015
1016	if (band->tuner == 0) {
1017		if (band->index >= ARRAY_SIZE(bands_adc))
1018			return -EINVAL;
1019
1020		*band = bands_adc[band->index];
1021		ret = 0;
1022	} else if (band->tuner == 1 &&
1023		   V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1024		ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1025	} else if (band->tuner == 1) {
1026		if (band->index >= ARRAY_SIZE(bands_fm))
1027			return -EINVAL;
1028
1029		*band = bands_fm[band->index];
1030		ret = 0;
1031	} else {
1032		ret = -EINVAL;
1033	}
1034	return ret;
1035}
1036
1037static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1038		struct v4l2_frequency *f)
1039{
1040	struct rtl2832_sdr_dev *dev = video_drvdata(file);
1041	struct platform_device *pdev = dev->pdev;
1042	int ret;
1043
1044	dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1045
1046	if (f->tuner == 0) {
1047		f->frequency = dev->f_adc;
1048		f->type = V4L2_TUNER_ADC;
1049		ret = 0;
1050	} else if (f->tuner == 1 &&
1051		   V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1052		f->type = V4L2_TUNER_RF;
1053		ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1054	} else if (f->tuner == 1) {
1055		f->frequency = dev->f_tuner;
1056		f->type = V4L2_TUNER_RF;
1057		ret = 0;
1058	} else {
1059		ret = -EINVAL;
1060	}
1061	return ret;
1062}
1063
1064static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1065		const struct v4l2_frequency *f)
1066{
1067	struct rtl2832_sdr_dev *dev = video_drvdata(file);
1068	struct platform_device *pdev = dev->pdev;
1069	int ret, band;
1070
1071	dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1072		f->tuner, f->type, f->frequency);
1073
1074	/* ADC band midpoints */
1075	#define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1076	#define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1077
1078	if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1079		if (f->frequency < BAND_ADC_0)
1080			band = 0;
1081		else if (f->frequency < BAND_ADC_1)
1082			band = 1;
1083		else
1084			band = 2;
1085
1086		dev->f_adc = clamp_t(unsigned int, f->frequency,
1087				     bands_adc[band].rangelow,
1088				     bands_adc[band].rangehigh);
1089
1090		dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1091		ret = rtl2832_sdr_set_adc(dev);
1092	} else if (f->tuner == 1 &&
1093		   V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1094		ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1095	} else if (f->tuner == 1) {
1096		dev->f_tuner = clamp_t(unsigned int, f->frequency,
1097				bands_fm[0].rangelow,
1098				bands_fm[0].rangehigh);
1099		dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1100
1101		ret = rtl2832_sdr_set_tuner_freq(dev);
1102	} else {
1103		ret = -EINVAL;
1104	}
1105	return ret;
1106}
1107
1108static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1109		struct v4l2_fmtdesc *f)
1110{
1111	struct rtl2832_sdr_dev *dev = video_drvdata(file);
1112	struct platform_device *pdev = dev->pdev;
1113
1114	dev_dbg(&pdev->dev, "\n");
1115
1116	if (f->index >= dev->num_formats)
1117		return -EINVAL;
1118
1119	f->pixelformat = formats[f->index].pixelformat;
1120
1121	return 0;
1122}
1123
1124static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1125		struct v4l2_format *f)
1126{
1127	struct rtl2832_sdr_dev *dev = video_drvdata(file);
1128	struct platform_device *pdev = dev->pdev;
1129
1130	dev_dbg(&pdev->dev, "\n");
1131
1132	f->fmt.sdr.pixelformat = dev->pixelformat;
1133	f->fmt.sdr.buffersize = dev->buffersize;
1134
1135	return 0;
1136}
1137
1138static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1139		struct v4l2_format *f)
1140{
1141	struct rtl2832_sdr_dev *dev = video_drvdata(file);
1142	struct platform_device *pdev = dev->pdev;
1143	struct vb2_queue *q = &dev->vb_queue;
1144	int i;
1145
1146	dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1147		(char *)&f->fmt.sdr.pixelformat);
1148
1149	if (vb2_is_busy(q))
1150		return -EBUSY;
1151
1152	for (i = 0; i < dev->num_formats; i++) {
1153		if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1154			dev->pixelformat = formats[i].pixelformat;
1155			dev->buffersize = formats[i].buffersize;
1156			f->fmt.sdr.buffersize = formats[i].buffersize;
1157			return 0;
1158		}
1159	}
1160
1161	dev->pixelformat = formats[0].pixelformat;
1162	dev->buffersize = formats[0].buffersize;
1163	f->fmt.sdr.pixelformat = formats[0].pixelformat;
1164	f->fmt.sdr.buffersize = formats[0].buffersize;
1165
1166	return 0;
1167}
1168
1169static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1170		struct v4l2_format *f)
1171{
1172	struct rtl2832_sdr_dev *dev = video_drvdata(file);
1173	struct platform_device *pdev = dev->pdev;
1174	int i;
1175
1176	dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1177		(char *)&f->fmt.sdr.pixelformat);
1178
1179	for (i = 0; i < dev->num_formats; i++) {
1180		if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1181			f->fmt.sdr.buffersize = formats[i].buffersize;
1182			return 0;
1183		}
1184	}
1185
1186	f->fmt.sdr.pixelformat = formats[0].pixelformat;
1187	f->fmt.sdr.buffersize = formats[0].buffersize;
1188
1189	return 0;
1190}
1191
1192static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1193	.vidioc_querycap          = rtl2832_sdr_querycap,
1194
1195	.vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1196	.vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1197	.vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1198	.vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1199
1200	.vidioc_reqbufs           = vb2_ioctl_reqbufs,
1201	.vidioc_create_bufs       = vb2_ioctl_create_bufs,
1202	.vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1203	.vidioc_querybuf          = vb2_ioctl_querybuf,
1204	.vidioc_qbuf              = vb2_ioctl_qbuf,
1205	.vidioc_dqbuf             = vb2_ioctl_dqbuf,
1206
1207	.vidioc_streamon          = vb2_ioctl_streamon,
1208	.vidioc_streamoff         = vb2_ioctl_streamoff,
1209
1210	.vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1211	.vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1212
1213	.vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1214	.vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1215	.vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1216
1217	.vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1218	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1219	.vidioc_log_status        = v4l2_ctrl_log_status,
1220};
1221
1222static const struct v4l2_file_operations rtl2832_sdr_fops = {
1223	.owner                    = THIS_MODULE,
1224	.open                     = v4l2_fh_open,
1225	.release                  = vb2_fop_release,
1226	.read                     = vb2_fop_read,
1227	.poll                     = vb2_fop_poll,
1228	.mmap                     = vb2_fop_mmap,
1229	.unlocked_ioctl           = video_ioctl2,
1230};
1231
1232static struct video_device rtl2832_sdr_template = {
1233	.name                     = "Realtek RTL2832 SDR",
1234	.release                  = video_device_release_empty,
1235	.fops                     = &rtl2832_sdr_fops,
1236	.ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1237	.device_caps		  = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1238				    V4L2_CAP_READWRITE | V4L2_CAP_TUNER,
1239};
1240
1241static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1242{
1243	struct rtl2832_sdr_dev *dev =
1244			container_of(ctrl->handler, struct rtl2832_sdr_dev,
1245					hdl);
1246	struct platform_device *pdev = dev->pdev;
1247	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1248	struct dvb_frontend *fe = pdata->dvb_frontend;
1249	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1250	int ret;
1251
1252	dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1253		ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1254		ctrl->step);
1255
1256	switch (ctrl->id) {
1257	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1258	case V4L2_CID_RF_TUNER_BANDWIDTH:
1259		/* TODO: these controls should be moved to tuner drivers */
1260		if (dev->bandwidth_auto->val) {
1261			/* Round towards the closest legal value */
1262			s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1263			u32 offset;
1264
1265			val = clamp_t(s32, val, dev->bandwidth->minimum,
1266				      dev->bandwidth->maximum);
1267			offset = val - dev->bandwidth->minimum;
1268			offset = dev->bandwidth->step *
1269				div_u64(offset, dev->bandwidth->step);
1270			dev->bandwidth->val = dev->bandwidth->minimum + offset;
1271		}
1272		c->bandwidth_hz = dev->bandwidth->val;
1273
1274		if (!test_bit(POWER_ON, &dev->flags))
1275			return 0;
1276
1277		if (fe->ops.tuner_ops.set_params)
1278			ret = fe->ops.tuner_ops.set_params(fe);
1279		else
1280			ret = 0;
1281		break;
1282	default:
1283		ret = -EINVAL;
1284	}
1285
1286	return ret;
1287}
1288
1289static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1290	.s_ctrl = rtl2832_sdr_s_ctrl,
1291};
1292
1293static void rtl2832_sdr_video_release(struct v4l2_device *v)
1294{
1295	struct rtl2832_sdr_dev *dev =
1296			container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1297	struct platform_device *pdev = dev->pdev;
1298
1299	dev_dbg(&pdev->dev, "\n");
1300
1301	v4l2_ctrl_handler_free(&dev->hdl);
1302	v4l2_device_unregister(&dev->v4l2_dev);
1303	kfree(dev);
1304}
1305
1306/* Platform driver interface */
1307static int rtl2832_sdr_probe(struct platform_device *pdev)
1308{
1309	struct rtl2832_sdr_dev *dev;
1310	struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1311	const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1312	struct v4l2_subdev *subdev;
1313	int ret;
1314
1315	dev_dbg(&pdev->dev, "\n");
1316
1317	if (!pdata) {
1318		dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1319		ret = -EINVAL;
1320		goto err;
1321	}
1322	if (!pdev->dev.parent->driver) {
1323		dev_dbg(&pdev->dev, "No parent device\n");
1324		ret = -EINVAL;
1325		goto err;
1326	}
1327	/* try to refcount host drv since we are the consumer */
1328	if (!try_module_get(pdev->dev.parent->driver->owner)) {
1329		dev_err(&pdev->dev, "Refcount fail");
1330		ret = -EINVAL;
1331		goto err;
1332	}
1333	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1334	if (dev == NULL) {
1335		ret = -ENOMEM;
1336		goto err_module_put;
1337	}
1338
1339	/* setup the state */
1340	subdev = pdata->v4l2_subdev;
1341	dev->v4l2_subdev = pdata->v4l2_subdev;
1342	dev->pdev = pdev;
1343	dev->regmap = pdata->regmap;
1344	dev->udev = pdata->dvb_usb_device->udev;
1345	dev->f_adc = bands_adc[0].rangelow;
1346	dev->f_tuner = bands_fm[0].rangelow;
1347	dev->pixelformat = formats[0].pixelformat;
1348	dev->buffersize = formats[0].buffersize;
1349	dev->num_formats = NUM_FORMATS;
1350	if (!rtl2832_sdr_emulated_fmt)
1351		dev->num_formats -= 1;
1352
1353	mutex_init(&dev->v4l2_lock);
1354	mutex_init(&dev->vb_queue_lock);
1355	spin_lock_init(&dev->queued_bufs_lock);
1356	INIT_LIST_HEAD(&dev->queued_bufs);
1357
1358	/* Init videobuf2 queue structure */
1359	dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1360	dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1361	dev->vb_queue.drv_priv = dev;
1362	dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1363	dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1364	dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1365	dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1366	dev->vb_queue.lock = &dev->vb_queue_lock;
1367	ret = vb2_queue_init(&dev->vb_queue);
1368	if (ret) {
1369		dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1370		goto err_kfree;
1371	}
1372
1373	/* Register controls */
1374	switch (pdata->tuner) {
1375	case RTL2832_SDR_TUNER_E4000:
1376		v4l2_ctrl_handler_init(&dev->hdl, 9);
1377		if (subdev)
1378			v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1379					      NULL, true);
1380		break;
1381	case RTL2832_SDR_TUNER_R820T:
1382	case RTL2832_SDR_TUNER_R828D:
1383		v4l2_ctrl_handler_init(&dev->hdl, 2);
1384		dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1385							V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1386							0, 1, 1, 1);
1387		dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1388						   V4L2_CID_RF_TUNER_BANDWIDTH,
1389						   0, 8000000, 100000, 0);
1390		v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1391		break;
1392	case RTL2832_SDR_TUNER_FC0012:
1393	case RTL2832_SDR_TUNER_FC0013:
1394		v4l2_ctrl_handler_init(&dev->hdl, 2);
1395		dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1396							V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1397							0, 1, 1, 1);
1398		dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1399						   V4L2_CID_RF_TUNER_BANDWIDTH,
1400						   6000000, 8000000, 1000000,
1401						   6000000);
1402		v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1403		break;
1404	case RTL2832_SDR_TUNER_FC2580:
1405		v4l2_ctrl_handler_init(&dev->hdl, 2);
1406		if (subdev)
1407			v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1408					      NULL, true);
1409		break;
1410	default:
1411		v4l2_ctrl_handler_init(&dev->hdl, 0);
1412		dev_err(&pdev->dev, "Unsupported tuner\n");
1413		ret = -ENODEV;
1414		goto err_v4l2_ctrl_handler_free;
1415	}
1416	if (dev->hdl.error) {
1417		ret = dev->hdl.error;
1418		dev_err(&pdev->dev, "Could not initialize controls\n");
1419		goto err_v4l2_ctrl_handler_free;
1420	}
1421
1422	/* Init video_device structure */
1423	dev->vdev = rtl2832_sdr_template;
1424	dev->vdev.queue = &dev->vb_queue;
1425	video_set_drvdata(&dev->vdev, dev);
1426
1427	/* Register the v4l2_device structure */
1428	dev->v4l2_dev.release = rtl2832_sdr_video_release;
1429	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1430	if (ret) {
1431		dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1432		goto err_v4l2_ctrl_handler_free;
1433	}
1434
1435	dev->v4l2_dev.ctrl_handler = &dev->hdl;
1436	dev->vdev.v4l2_dev = &dev->v4l2_dev;
1437	dev->vdev.lock = &dev->v4l2_lock;
1438	dev->vdev.vfl_dir = VFL_DIR_RX;
1439
1440	ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1441	if (ret) {
1442		dev_err(&pdev->dev, "Failed to register as video device %d\n",
1443			ret);
1444		goto err_v4l2_device_unregister;
1445	}
1446	dev_info(&pdev->dev, "Registered as %s\n",
1447		 video_device_node_name(&dev->vdev));
1448	dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1449	dev_notice(&pdev->dev,
1450		   "SDR API is still slightly experimental and functionality changes may follow\n");
1451	platform_set_drvdata(pdev, dev);
1452	return 0;
1453err_v4l2_device_unregister:
1454	v4l2_device_unregister(&dev->v4l2_dev);
1455err_v4l2_ctrl_handler_free:
1456	v4l2_ctrl_handler_free(&dev->hdl);
1457err_kfree:
1458	kfree(dev);
1459err_module_put:
1460	module_put(pdev->dev.parent->driver->owner);
1461err:
1462	return ret;
1463}
1464
1465static void rtl2832_sdr_remove(struct platform_device *pdev)
1466{
1467	struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1468
1469	dev_dbg(&pdev->dev, "\n");
1470
1471	mutex_lock(&dev->vb_queue_lock);
1472	mutex_lock(&dev->v4l2_lock);
1473	/* No need to keep the urbs around after disconnection */
1474	dev->udev = NULL;
1475	v4l2_device_disconnect(&dev->v4l2_dev);
1476	video_unregister_device(&dev->vdev);
1477	mutex_unlock(&dev->v4l2_lock);
1478	mutex_unlock(&dev->vb_queue_lock);
1479	v4l2_device_put(&dev->v4l2_dev);
1480	module_put(pdev->dev.parent->driver->owner);
1481}
1482
1483static struct platform_driver rtl2832_sdr_driver = {
1484	.driver = {
1485		.name   = "rtl2832_sdr",
1486	},
1487	.probe          = rtl2832_sdr_probe,
1488	.remove         = rtl2832_sdr_remove,
1489};
1490module_platform_driver(rtl2832_sdr_driver);
1491
1492MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1493MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1494MODULE_LICENSE("GPL");