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linux/drivers/media/dvb-frontends/rtl2832_sdr.c

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/*
* Realtek RTL2832U SDR driver
*
* Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* GNU Radio plugin "gr-kernel" for device usage will be on:
* http://git.linuxtv.org/anttip/gr-kernel.git
*
*/
#include "rtl2832_sdr.h"
#include "dvb_usb.h"
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-vmalloc.h>
#include <linux/platform_device.h>
#include <linux/jiffies.h>
#include <linux/math64.h>
#include <linux/regmap.h>
static bool rtl2832_sdr_emulated_fmt;
module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
/* Original macro does not contain enough null pointer checks for our need */
#define V4L2_SUBDEV_HAS_OP(sd, o, f) \
((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
#define MAX_BULK_BUFS (10)
#define BULK_BUFFER_SIZE (128 * 512)
static const struct v4l2_frequency_band bands_adc[] = {
{
.tuner = 0,
.type = V4L2_TUNER_ADC,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 300000,
.rangehigh = 300000,
},
{
.tuner = 0,
.type = V4L2_TUNER_ADC,
.index = 1,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 900001,
.rangehigh = 2800000,
},
{
.tuner = 0,
.type = V4L2_TUNER_ADC,
.index = 2,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 3200000,
.rangehigh = 3200000,
},
};
static const struct v4l2_frequency_band bands_fm[] = {
{
.tuner = 1,
.type = V4L2_TUNER_RF,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 50000000,
.rangehigh = 2000000000,
},
};
/* stream formats */
struct rtl2832_sdr_format {
char *name;
u32 pixelformat;
u32 buffersize;
};
static struct rtl2832_sdr_format formats[] = {
{
.name = "Complex U8",
.pixelformat = V4L2_SDR_FMT_CU8,
.buffersize = BULK_BUFFER_SIZE,
}, {
.name = "Complex U16LE (emulated)",
.pixelformat = V4L2_SDR_FMT_CU16LE,
.buffersize = BULK_BUFFER_SIZE * 2,
},
};
static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
/* intermediate buffers with raw data from the USB device */
struct rtl2832_sdr_frame_buf {
/* common v4l buffer stuff -- must be first */
struct vb2_v4l2_buffer vb;
struct list_head list;
};
struct rtl2832_sdr_dev {
#define POWER_ON 0 /* BIT(0) */
#define URB_BUF 1 /* BIT(1) */
unsigned long flags;
struct platform_device *pdev;
struct regmap *regmap;
struct video_device vdev;
struct v4l2_device v4l2_dev;
struct v4l2_subdev *v4l2_subdev;
/* videobuf2 queue and queued buffers list */
struct vb2_queue vb_queue;
struct list_head queued_bufs;
spinlock_t queued_bufs_lock; /* Protects queued_bufs */
unsigned sequence; /* buffer sequence counter */
/* Note if taking both locks v4l2_lock must always be locked first! */
struct mutex v4l2_lock; /* Protects everything else */
struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
/* Pointer to our usb_device, will be NULL after unplug */
struct usb_device *udev; /* Both mutexes most be hold when setting! */
unsigned int vb_full; /* vb is full and packets dropped */
struct urb *urb_list[MAX_BULK_BUFS];
int buf_num;
unsigned long buf_size;
u8 *buf_list[MAX_BULK_BUFS];
dma_addr_t dma_addr[MAX_BULK_BUFS];
int urbs_initialized;
int urbs_submitted;
unsigned int f_adc, f_tuner;
u32 pixelformat;
u32 buffersize;
unsigned int num_formats;
/* Controls */
struct v4l2_ctrl_handler hdl;
struct v4l2_ctrl *bandwidth_auto;
struct v4l2_ctrl *bandwidth;
/* for sample rate calc */
unsigned int sample;
unsigned int sample_measured;
unsigned long jiffies_next;
};
/* Private functions */
static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
struct rtl2832_sdr_dev *dev)
{
unsigned long flags;
struct rtl2832_sdr_frame_buf *buf = NULL;
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
if (list_empty(&dev->queued_bufs))
goto leave;
buf = list_entry(dev->queued_bufs.next,
struct rtl2832_sdr_frame_buf, list);
list_del(&buf->list);
leave:
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
return buf;
}
static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
void *dst, const u8 *src, unsigned int src_len)
{
struct platform_device *pdev = dev->pdev;
unsigned int dst_len;
if (dev->pixelformat == V4L2_SDR_FMT_CU8) {
/* native stream, no need to convert */
memcpy(dst, src, src_len);
dst_len = src_len;
} else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
/* convert u8 to u16 */
unsigned int i;
u16 *u16dst = dst;
for (i = 0; i < src_len; i++)
*u16dst++ = (src[i] << 8) | (src[i] >> 0);
dst_len = 2 * src_len;
} else {
dst_len = 0;
}
/* calculate sample rate and output it in 10 seconds intervals */
if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
#define MSECS 10000UL
unsigned int msecs = jiffies_to_msecs(jiffies -
dev->jiffies_next + msecs_to_jiffies(MSECS));
unsigned int samples = dev->sample - dev->sample_measured;
dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
dev->sample_measured = dev->sample;
dev_dbg(&pdev->dev,
"slen=%u samples=%u msecs=%u sample rate=%lu\n",
src_len, samples, msecs, samples * 1000UL / msecs);
}
/* total number of I+Q pairs */
dev->sample += src_len / 2;
return dst_len;
}
/*
* This gets called for the bulk stream pipe. This is done in interrupt
* time, so it has to be fast, not crash, and not stall. Neat.
*/
static void rtl2832_sdr_urb_complete(struct urb *urb)
{
struct rtl2832_sdr_dev *dev = urb->context;
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_frame_buf *fbuf;
dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
urb->status, urb->actual_length,
urb->transfer_buffer_length, urb->error_count);
switch (urb->status) {
case 0: /* success */
case -ETIMEDOUT: /* NAK */
break;
case -ECONNRESET: /* kill */
case -ENOENT:
case -ESHUTDOWN:
return;
default: /* error */
dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
break;
}
if (likely(urb->actual_length > 0)) {
void *ptr;
unsigned int len;
/* get free framebuffer */
fbuf = rtl2832_sdr_get_next_fill_buf(dev);
if (unlikely(fbuf == NULL)) {
dev->vb_full++;
dev_notice_ratelimited(&pdev->dev,
"videobuf is full, %d packets dropped\n",
dev->vb_full);
goto skip;
}
/* fill framebuffer */
ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
urb->actual_length);
vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
fbuf->vb.sequence = dev->sequence++;
vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
}
skip:
usb_submit_urb(urb, GFP_ATOMIC);
}
static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
int i;
for (i = dev->urbs_submitted - 1; i >= 0; i--) {
dev_dbg(&pdev->dev, "kill urb=%d\n", i);
/* stop the URB */
usb_kill_urb(dev->urb_list[i]);
}
dev->urbs_submitted = 0;
return 0;
}
static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
int i, ret;
for (i = 0; i < dev->urbs_initialized; i++) {
dev_dbg(&pdev->dev, "submit urb=%d\n", i);
ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL);
if (ret) {
dev_err(&pdev->dev,
"Could not submit urb no. %d - get them all back\n",
i);
rtl2832_sdr_kill_urbs(dev);
return ret;
}
dev->urbs_submitted++;
}
return 0;
}
static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
if (test_bit(URB_BUF, &dev->flags)) {
while (dev->buf_num) {
dev->buf_num--;
dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
usb_free_coherent(dev->udev, dev->buf_size,
dev->buf_list[dev->buf_num],
dev->dma_addr[dev->buf_num]);
}
}
clear_bit(URB_BUF, &dev->flags);
return 0;
}
static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
dev->buf_num = 0;
dev->buf_size = BULK_BUFFER_SIZE;
dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
MAX_BULK_BUFS * BULK_BUFFER_SIZE);
for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
BULK_BUFFER_SIZE, GFP_KERNEL,
&dev->dma_addr[dev->buf_num]);
if (!dev->buf_list[dev->buf_num]) {
dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
dev->buf_num);
rtl2832_sdr_free_stream_bufs(dev);
return -ENOMEM;
}
dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
dev->buf_num, dev->buf_list[dev->buf_num],
(long long)dev->dma_addr[dev->buf_num]);
set_bit(URB_BUF, &dev->flags);
}
return 0;
}
static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
int i;
rtl2832_sdr_kill_urbs(dev);
for (i = dev->urbs_initialized - 1; i >= 0; i--) {
if (dev->urb_list[i]) {
dev_dbg(&pdev->dev, "free urb=%d\n", i);
/* free the URBs */
usb_free_urb(dev->urb_list[i]);
}
}
dev->urbs_initialized = 0;
return 0;
}
static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
int i, j;
/* allocate the URBs */
for (i = 0; i < MAX_BULK_BUFS; i++) {
dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->urb_list[i]) {
for (j = 0; j < i; j++)
usb_free_urb(dev->urb_list[j]);
return -ENOMEM;
}
usb_fill_bulk_urb(dev->urb_list[i],
dev->udev,
usb_rcvbulkpipe(dev->udev, 0x81),
dev->buf_list[i],
BULK_BUFFER_SIZE,
rtl2832_sdr_urb_complete, dev);
dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
dev->urbs_initialized++;
}
return 0;
}
/* Must be called with vb_queue_lock hold */
static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
unsigned long flags;
dev_dbg(&pdev->dev, "\n");
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
while (!list_empty(&dev->queued_bufs)) {
struct rtl2832_sdr_frame_buf *buf;
buf = list_entry(dev->queued_bufs.next,
struct rtl2832_sdr_frame_buf, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
}
static int rtl2832_sdr_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
dev_dbg(&pdev->dev, "\n");
strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
/* Videobuf2 operations */
static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
{
struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
struct platform_device *pdev = dev->pdev;
dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
/* Need at least 8 buffers */
if (vq->num_buffers + *nbuffers < 8)
*nbuffers = 8 - vq->num_buffers;
*nplanes = 1;
sizes[0] = PAGE_ALIGN(dev->buffersize);
dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
return 0;
}
static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
{
struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
/* Don't allow queing new buffers after device disconnection */
if (!dev->udev)
return -ENODEV;
return 0;
}
static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct rtl2832_sdr_frame_buf *buf =
container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
unsigned long flags;
/* Check the device has not disconnected between prep and queuing */
if (!dev->udev) {
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
return;
}
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
list_add_tail(&buf->list, &dev->queued_bufs);
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
}
static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
int ret;
unsigned int f_sr, f_if;
u8 buf[4], u8tmp1, u8tmp2;
u64 u64tmp;
u32 u32tmp;
dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
if (!test_bit(POWER_ON, &dev->flags))
return 0;
if (dev->f_adc == 0)
return 0;
f_sr = dev->f_adc;
ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
if (ret)
goto err;
/* get IF from tuner */
if (fe->ops.tuner_ops.get_if_frequency)
ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
else
ret = -EINVAL;
if (ret)
goto err;
/* program IF */
u64tmp = f_if % pdata->clk;
u64tmp *= 0x400000;
u64tmp = div_u64(u64tmp, pdata->clk);
u64tmp = -u64tmp;
u32tmp = u64tmp & 0x3fffff;
dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
buf[0] = (u32tmp >> 16) & 0xff;
buf[1] = (u32tmp >> 8) & 0xff;
buf[2] = (u32tmp >> 0) & 0xff;
ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
if (ret)
goto err;
/* BB / IF mode */
/* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
if (f_if) {
u8tmp1 = 0x1a; /* disable Zero-IF */
u8tmp2 = 0x8d; /* enable ADC I */
} else {
u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
}
ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x008, u8tmp2);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x006, 0x80);
if (ret)
goto err;
/* program sampling rate (resampling down) */
u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
u32tmp <<= 2;
buf[0] = (u32tmp >> 24) & 0xff;
buf[1] = (u32tmp >> 16) & 0xff;
buf[2] = (u32tmp >> 8) & 0xff;
buf[3] = (u32tmp >> 0) & 0xff;
ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
if (ret)
goto err;
/* low-pass filter */
ret = regmap_bulk_write(dev->regmap, 0x11c,
"\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
20);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
if (ret)
goto err;
/* mode */
ret = regmap_write(dev->regmap, 0x019, 0x05);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x01a,
"\x1b\x16\x0d\x06\x01\xff", 6);
if (ret)
goto err;
/* FSM */
ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
if (ret)
goto err;
/* PID filter */
ret = regmap_write(dev->regmap, 0x061, 0x60);
if (ret)
goto err;
/* used RF tuner based settings */
switch (pdata->tuner) {
case RTL2832_SDR_TUNER_E4000:
ret = regmap_write(dev->regmap, 0x112, 0x5a);
ret = regmap_write(dev->regmap, 0x102, 0x40);
ret = regmap_write(dev->regmap, 0x103, 0x5a);
ret = regmap_write(dev->regmap, 0x1c7, 0x30);
ret = regmap_write(dev->regmap, 0x104, 0xd0);
ret = regmap_write(dev->regmap, 0x105, 0xbe);
ret = regmap_write(dev->regmap, 0x1c8, 0x18);
ret = regmap_write(dev->regmap, 0x106, 0x35);
ret = regmap_write(dev->regmap, 0x1c9, 0x21);
ret = regmap_write(dev->regmap, 0x1ca, 0x21);
ret = regmap_write(dev->regmap, 0x1cb, 0x00);
ret = regmap_write(dev->regmap, 0x107, 0x40);
ret = regmap_write(dev->regmap, 0x1cd, 0x10);
ret = regmap_write(dev->regmap, 0x1ce, 0x10);
ret = regmap_write(dev->regmap, 0x108, 0x80);
ret = regmap_write(dev->regmap, 0x109, 0x7f);
ret = regmap_write(dev->regmap, 0x10a, 0x80);
ret = regmap_write(dev->regmap, 0x10b, 0x7f);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_write(dev->regmap, 0x011, 0xd4);
ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
ret = regmap_write(dev->regmap, 0x1d9, 0x00);
ret = regmap_write(dev->regmap, 0x1db, 0x00);
ret = regmap_write(dev->regmap, 0x1dd, 0x14);
ret = regmap_write(dev->regmap, 0x1de, 0xec);
ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
ret = regmap_write(dev->regmap, 0x1e6, 0x02);
ret = regmap_write(dev->regmap, 0x1d7, 0x09);
ret = regmap_write(dev->regmap, 0x00d, 0x83);
ret = regmap_write(dev->regmap, 0x010, 0x49);
ret = regmap_write(dev->regmap, 0x00d, 0x87);
ret = regmap_write(dev->regmap, 0x00d, 0x85);
ret = regmap_write(dev->regmap, 0x013, 0x02);
break;
case RTL2832_SDR_TUNER_FC0012:
case RTL2832_SDR_TUNER_FC0013:
ret = regmap_write(dev->regmap, 0x112, 0x5a);
ret = regmap_write(dev->regmap, 0x102, 0x40);
ret = regmap_write(dev->regmap, 0x103, 0x5a);
ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
ret = regmap_write(dev->regmap, 0x104, 0xcc);
ret = regmap_write(dev->regmap, 0x105, 0xbe);
ret = regmap_write(dev->regmap, 0x1c8, 0x16);
ret = regmap_write(dev->regmap, 0x106, 0x35);
ret = regmap_write(dev->regmap, 0x1c9, 0x21);
ret = regmap_write(dev->regmap, 0x1ca, 0x21);
ret = regmap_write(dev->regmap, 0x1cb, 0x00);
ret = regmap_write(dev->regmap, 0x107, 0x40);
ret = regmap_write(dev->regmap, 0x1cd, 0x10);
ret = regmap_write(dev->regmap, 0x1ce, 0x10);
ret = regmap_write(dev->regmap, 0x108, 0x80);
ret = regmap_write(dev->regmap, 0x109, 0x7f);
ret = regmap_write(dev->regmap, 0x10a, 0x80);
ret = regmap_write(dev->regmap, 0x10b, 0x7f);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
ret = regmap_write(dev->regmap, 0x1d9, 0x00);
ret = regmap_write(dev->regmap, 0x1db, 0x00);
ret = regmap_write(dev->regmap, 0x1dd, 0x11);
ret = regmap_write(dev->regmap, 0x1de, 0xef);
ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
ret = regmap_write(dev->regmap, 0x1e6, 0x02);
ret = regmap_write(dev->regmap, 0x1d7, 0x09);
break;
case RTL2832_SDR_TUNER_R820T:
case RTL2832_SDR_TUNER_R828D:
ret = regmap_write(dev->regmap, 0x112, 0x5a);
ret = regmap_write(dev->regmap, 0x102, 0x40);
ret = regmap_write(dev->regmap, 0x115, 0x01);
ret = regmap_write(dev->regmap, 0x103, 0x80);
ret = regmap_write(dev->regmap, 0x1c7, 0x24);
ret = regmap_write(dev->regmap, 0x104, 0xcc);
ret = regmap_write(dev->regmap, 0x105, 0xbe);
ret = regmap_write(dev->regmap, 0x1c8, 0x14);
ret = regmap_write(dev->regmap, 0x106, 0x35);
ret = regmap_write(dev->regmap, 0x1c9, 0x21);
ret = regmap_write(dev->regmap, 0x1ca, 0x21);
ret = regmap_write(dev->regmap, 0x1cb, 0x00);
ret = regmap_write(dev->regmap, 0x107, 0x40);
ret = regmap_write(dev->regmap, 0x1cd, 0x10);
ret = regmap_write(dev->regmap, 0x1ce, 0x10);
ret = regmap_write(dev->regmap, 0x108, 0x80);
ret = regmap_write(dev->regmap, 0x109, 0x7f);
ret = regmap_write(dev->regmap, 0x10a, 0x80);
ret = regmap_write(dev->regmap, 0x10b, 0x7f);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_write(dev->regmap, 0x011, 0xf4);
break;
case RTL2832_SDR_TUNER_FC2580:
ret = regmap_write(dev->regmap, 0x112, 0x39);
ret = regmap_write(dev->regmap, 0x102, 0x40);
ret = regmap_write(dev->regmap, 0x103, 0x5a);
ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
ret = regmap_write(dev->regmap, 0x104, 0xcc);
ret = regmap_write(dev->regmap, 0x105, 0xbe);
ret = regmap_write(dev->regmap, 0x1c8, 0x16);
ret = regmap_write(dev->regmap, 0x106, 0x35);
ret = regmap_write(dev->regmap, 0x1c9, 0x21);
ret = regmap_write(dev->regmap, 0x1ca, 0x21);
ret = regmap_write(dev->regmap, 0x1cb, 0x00);
ret = regmap_write(dev->regmap, 0x107, 0x40);
ret = regmap_write(dev->regmap, 0x1cd, 0x10);
ret = regmap_write(dev->regmap, 0x1ce, 0x10);
ret = regmap_write(dev->regmap, 0x108, 0x80);
ret = regmap_write(dev->regmap, 0x109, 0x7f);
ret = regmap_write(dev->regmap, 0x10a, 0x9c);
ret = regmap_write(dev->regmap, 0x10b, 0x7f);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_write(dev->regmap, 0x00e, 0xfc);
ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
break;
default:
dev_notice(&pdev->dev, "Unsupported tuner\n");
}
/* software reset */
ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
if (ret)
goto err;
ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
if (ret)
goto err;
err:
return ret;
};
static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
int ret;
dev_dbg(&pdev->dev, "\n");
/* PID filter */
ret = regmap_write(dev->regmap, 0x061, 0xe0);
if (ret)
goto err;
/* mode */
ret = regmap_write(dev->regmap, 0x019, 0x20);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
if (ret)
goto err;
/* FSM */
ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
if (ret)
goto err;
err:
return;
};
static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct v4l2_ctrl *bandwidth_auto;
struct v4l2_ctrl *bandwidth;
/*
* tuner RF (Hz)
*/
if (dev->f_tuner == 0)
return 0;
/*
* bandwidth (Hz)
*/
bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
c->bandwidth_hz = dev->f_adc;
v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
} else {
c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
}
c->frequency = dev->f_tuner;
c->delivery_system = SYS_DVBT;
dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
c->frequency, c->bandwidth_hz);
if (!test_bit(POWER_ON, &dev->flags))
return 0;
if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
if (fe->ops.tuner_ops.set_params)
fe->ops.tuner_ops.set_params(fe);
}
return 0;
};
static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
dev_dbg(&pdev->dev, "\n");
if (fe->ops.tuner_ops.init)
fe->ops.tuner_ops.init(fe);
return 0;
};
static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
dev_dbg(&pdev->dev, "\n");
if (fe->ops.tuner_ops.sleep)
fe->ops.tuner_ops.sleep(fe);
return;
};
static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_usb_device *d = pdata->dvb_usb_device;
int ret;
dev_dbg(&pdev->dev, "\n");
if (!dev->udev)
return -ENODEV;
if (mutex_lock_interruptible(&dev->v4l2_lock))
return -ERESTARTSYS;
if (d->props->power_ctrl)
d->props->power_ctrl(d, 1);
/* enable ADC */
if (d->props->frontend_ctrl)
d->props->frontend_ctrl(pdata->dvb_frontend, 1);
set_bit(POWER_ON, &dev->flags);
/* wake-up tuner */
if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
else
ret = rtl2832_sdr_set_tuner(dev);
if (ret)
goto err;
ret = rtl2832_sdr_set_tuner_freq(dev);
if (ret)
goto err;
ret = rtl2832_sdr_set_adc(dev);
if (ret)
goto err;
ret = rtl2832_sdr_alloc_stream_bufs(dev);
if (ret)
goto err;
ret = rtl2832_sdr_alloc_urbs(dev);
if (ret)
goto err;
dev->sequence = 0;
ret = rtl2832_sdr_submit_urbs(dev);
if (ret)
goto err;
err:
mutex_unlock(&dev->v4l2_lock);
return ret;
}
static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
{
struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_usb_device *d = pdata->dvb_usb_device;
dev_dbg(&pdev->dev, "\n");
mutex_lock(&dev->v4l2_lock);
rtl2832_sdr_kill_urbs(dev);
rtl2832_sdr_free_urbs(dev);
rtl2832_sdr_free_stream_bufs(dev);
rtl2832_sdr_cleanup_queued_bufs(dev);
rtl2832_sdr_unset_adc(dev);
/* sleep tuner */
if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
else
rtl2832_sdr_unset_tuner(dev);
clear_bit(POWER_ON, &dev->flags);
/* disable ADC */
if (d->props->frontend_ctrl)
d->props->frontend_ctrl(pdata->dvb_frontend, 0);
if (d->props->power_ctrl)
d->props->power_ctrl(d, 0);
mutex_unlock(&dev->v4l2_lock);
}
static const struct vb2_ops rtl2832_sdr_vb2_ops = {
.queue_setup = rtl2832_sdr_queue_setup,
.buf_prepare = rtl2832_sdr_buf_prepare,
.buf_queue = rtl2832_sdr_buf_queue,
.start_streaming = rtl2832_sdr_start_streaming,
.stop_streaming = rtl2832_sdr_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
int ret;
dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
if (v->index == 0) {
strlcpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
v->type = V4L2_TUNER_ADC;
v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
v->rangelow = 300000;
v->rangehigh = 3200000;
ret = 0;
} else if (v->index == 1 &&
V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
} else if (v->index == 1) {
strlcpy(v->name, "RF: <unknown>", sizeof(v->name));
v->type = V4L2_TUNER_RF;
v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
v->rangelow = 50000000;
v->rangehigh = 2000000000;
ret = 0;
} else {
ret = -EINVAL;
}
return ret;
}
static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *v)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
int ret;
dev_dbg(&pdev->dev, "\n");
if (v->index == 0) {
ret = 0;
} else if (v->index == 1 &&
V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
} else if (v->index == 1) {
ret = 0;
} else {
ret = -EINVAL;
}
return ret;
}
static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
struct v4l2_frequency_band *band)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
int ret;
dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
band->tuner, band->type, band->index);
if (band->tuner == 0) {
if (band->index >= ARRAY_SIZE(bands_adc))
return -EINVAL;
*band = bands_adc[band->index];
ret = 0;
} else if (band->tuner == 1 &&
V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
} else if (band->tuner == 1) {
if (band->index >= ARRAY_SIZE(bands_fm))
return -EINVAL;
*band = bands_fm[band->index];
ret = 0;
} else {
ret = -EINVAL;
}
return ret;
}
static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
int ret;
dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
if (f->tuner == 0) {
f->frequency = dev->f_adc;
f->type = V4L2_TUNER_ADC;
ret = 0;
} else if (f->tuner == 1 &&
V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
f->type = V4L2_TUNER_RF;
ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
} else if (f->tuner == 1) {
f->frequency = dev->f_tuner;
f->type = V4L2_TUNER_RF;
ret = 0;
} else {
ret = -EINVAL;
}
return ret;
}
static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
int ret, band;
dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
f->tuner, f->type, f->frequency);
/* ADC band midpoints */
#define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
#define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
if (f->frequency < BAND_ADC_0)
band = 0;
else if (f->frequency < BAND_ADC_1)
band = 1;
else
band = 2;
dev->f_adc = clamp_t(unsigned int, f->frequency,
bands_adc[band].rangelow,
bands_adc[band].rangehigh);
dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
ret = rtl2832_sdr_set_adc(dev);
} else if (f->tuner == 1 &&
V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
} else if (f->tuner == 1) {
dev->f_tuner = clamp_t(unsigned int, f->frequency,
bands_fm[0].rangelow,
bands_fm[0].rangehigh);
dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
ret = rtl2832_sdr_set_tuner_freq(dev);
} else {
ret = -EINVAL;
}
return ret;
}
static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
dev_dbg(&pdev->dev, "\n");
if (f->index >= dev->num_formats)
return -EINVAL;
strlcpy(f->description, formats[f->index].name, sizeof(f->description));
f->pixelformat = formats[f->index].pixelformat;
return 0;
}
static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
dev_dbg(&pdev->dev, "\n");
f->fmt.sdr.pixelformat = dev->pixelformat;
f->fmt.sdr.buffersize = dev->buffersize;
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
return 0;
}
static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
struct vb2_queue *q = &dev->vb_queue;
int i;
dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
(char *)&f->fmt.sdr.pixelformat);
if (vb2_is_busy(q))
return -EBUSY;
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
for (i = 0; i < dev->num_formats; i++) {
if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
dev->pixelformat = formats[i].pixelformat;
dev->buffersize = formats[i].buffersize;
f->fmt.sdr.buffersize = formats[i].buffersize;
return 0;
}
}
dev->pixelformat = formats[0].pixelformat;
dev->buffersize = formats[0].buffersize;
f->fmt.sdr.pixelformat = formats[0].pixelformat;
f->fmt.sdr.buffersize = formats[0].buffersize;
return 0;
}
static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rtl2832_sdr_dev *dev = video_drvdata(file);
struct platform_device *pdev = dev->pdev;
int i;
dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
(char *)&f->fmt.sdr.pixelformat);
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
for (i = 0; i < dev->num_formats; i++) {
if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
f->fmt.sdr.buffersize = formats[i].buffersize;
return 0;
}
}
f->fmt.sdr.pixelformat = formats[0].pixelformat;
f->fmt.sdr.buffersize = formats[0].buffersize;
return 0;
}
static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
.vidioc_querycap = rtl2832_sdr_querycap,
.vidioc_enum_fmt_sdr_cap = rtl2832_sdr_enum_fmt_sdr_cap,
.vidioc_g_fmt_sdr_cap = rtl2832_sdr_g_fmt_sdr_cap,
.vidioc_s_fmt_sdr_cap = rtl2832_sdr_s_fmt_sdr_cap,
.vidioc_try_fmt_sdr_cap = rtl2832_sdr_try_fmt_sdr_cap,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_g_tuner = rtl2832_sdr_g_tuner,
.vidioc_s_tuner = rtl2832_sdr_s_tuner,
.vidioc_enum_freq_bands = rtl2832_sdr_enum_freq_bands,
.vidioc_g_frequency = rtl2832_sdr_g_frequency,
.vidioc_s_frequency = rtl2832_sdr_s_frequency,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
.vidioc_log_status = v4l2_ctrl_log_status,
};
static const struct v4l2_file_operations rtl2832_sdr_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static struct video_device rtl2832_sdr_template = {
.name = "Realtek RTL2832 SDR",
.release = video_device_release_empty,
.fops = &rtl2832_sdr_fops,
.ioctl_ops = &rtl2832_sdr_ioctl_ops,
};
static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct rtl2832_sdr_dev *dev =
container_of(ctrl->handler, struct rtl2832_sdr_dev,
hdl);
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
ctrl->step);
switch (ctrl->id) {
case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
case V4L2_CID_RF_TUNER_BANDWIDTH:
/* TODO: these controls should be moved to tuner drivers */
if (dev->bandwidth_auto->val) {
/* Round towards the closest legal value */
s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
u32 offset;
val = clamp_t(s32, val, dev->bandwidth->minimum,
dev->bandwidth->maximum);
offset = val - dev->bandwidth->minimum;
offset = dev->bandwidth->step *
div_u64(offset, dev->bandwidth->step);
dev->bandwidth->val = dev->bandwidth->minimum + offset;
}
c->bandwidth_hz = dev->bandwidth->val;
if (!test_bit(POWER_ON, &dev->flags))
return 0;
if (fe->ops.tuner_ops.set_params)
ret = fe->ops.tuner_ops.set_params(fe);
else
ret = 0;
break;
default:
ret = -EINVAL;
}
return ret;
}
static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
.s_ctrl = rtl2832_sdr_s_ctrl,
};
static void rtl2832_sdr_video_release(struct v4l2_device *v)
{
struct rtl2832_sdr_dev *dev =
container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
struct platform_device *pdev = dev->pdev;
dev_dbg(&pdev->dev, "\n");
v4l2_ctrl_handler_free(&dev->hdl);
v4l2_device_unregister(&dev->v4l2_dev);
kfree(dev);
}
/* Platform driver interface */
static int rtl2832_sdr_probe(struct platform_device *pdev)
{
struct rtl2832_sdr_dev *dev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
struct v4l2_subdev *subdev;
int ret;
dev_dbg(&pdev->dev, "\n");
if (!pdata) {
dev_err(&pdev->dev, "Cannot proceed without platform data\n");
ret = -EINVAL;
goto err;
}
if (!pdev->dev.parent->driver) {
dev_dbg(&pdev->dev, "No parent device\n");
ret = -EINVAL;
goto err;
}
/* try to refcount host drv since we are the consumer */
if (!try_module_get(pdev->dev.parent->driver->owner)) {
dev_err(&pdev->dev, "Refcount fail");
ret = -EINVAL;
goto err;
}
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
goto err_module_put;
}
/* setup the state */
subdev = pdata->v4l2_subdev;
dev->v4l2_subdev = pdata->v4l2_subdev;
dev->pdev = pdev;
dev->regmap = pdata->regmap;
dev->udev = pdata->dvb_usb_device->udev;
dev->f_adc = bands_adc[0].rangelow;
dev->f_tuner = bands_fm[0].rangelow;
dev->pixelformat = formats[0].pixelformat;
dev->buffersize = formats[0].buffersize;
dev->num_formats = NUM_FORMATS;
if (!rtl2832_sdr_emulated_fmt)
dev->num_formats -= 1;
mutex_init(&dev->v4l2_lock);
mutex_init(&dev->vb_queue_lock);
spin_lock_init(&dev->queued_bufs_lock);
INIT_LIST_HEAD(&dev->queued_bufs);
/* Init videobuf2 queue structure */
dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
dev->vb_queue.drv_priv = dev;
dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
ret = vb2_queue_init(&dev->vb_queue);
if (ret) {
dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
goto err_kfree;
}
/* Register controls */
switch (pdata->tuner) {
case RTL2832_SDR_TUNER_E4000:
v4l2_ctrl_handler_init(&dev->hdl, 9);
if (subdev)
v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler, NULL);
break;
case RTL2832_SDR_TUNER_R820T:
case RTL2832_SDR_TUNER_R828D:
v4l2_ctrl_handler_init(&dev->hdl, 2);
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH,
0, 8000000, 100000, 0);
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
break;
case RTL2832_SDR_TUNER_FC0012:
case RTL2832_SDR_TUNER_FC0013:
v4l2_ctrl_handler_init(&dev->hdl, 2);
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
V4L2_CID_RF_TUNER_BANDWIDTH,
6000000, 8000000, 1000000,
6000000);
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
break;
case RTL2832_SDR_TUNER_FC2580:
v4l2_ctrl_handler_init(&dev->hdl, 2);
if (subdev)
v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
NULL);
break;
default:
v4l2_ctrl_handler_init(&dev->hdl, 0);
dev_err(&pdev->dev, "Unsupported tuner\n");
goto err_v4l2_ctrl_handler_free;
}
if (dev->hdl.error) {
ret = dev->hdl.error;
dev_err(&pdev->dev, "Could not initialize controls\n");
goto err_v4l2_ctrl_handler_free;
}
/* Init video_device structure */
dev->vdev = rtl2832_sdr_template;
dev->vdev.queue = &dev->vb_queue;
dev->vdev.queue->lock = &dev->vb_queue_lock;
video_set_drvdata(&dev->vdev, dev);
/* Register the v4l2_device structure */
dev->v4l2_dev.release = rtl2832_sdr_video_release;
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
if (ret) {
dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
goto err_v4l2_ctrl_handler_free;
}
dev->v4l2_dev.ctrl_handler = &dev->hdl;
dev->vdev.v4l2_dev = &dev->v4l2_dev;
dev->vdev.lock = &dev->v4l2_lock;
dev->vdev.vfl_dir = VFL_DIR_RX;
ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
if (ret) {
dev_err(&pdev->dev, "Failed to register as video device %d\n",
ret);
goto err_v4l2_device_unregister;
}
dev_info(&pdev->dev, "Registered as %s\n",
video_device_node_name(&dev->vdev));
dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
dev_notice(&pdev->dev,
"SDR API is still slightly experimental and functionality changes may follow\n");
platform_set_drvdata(pdev, dev);
return 0;
err_v4l2_device_unregister:
v4l2_device_unregister(&dev->v4l2_dev);
err_v4l2_ctrl_handler_free:
v4l2_ctrl_handler_free(&dev->hdl);
err_kfree:
kfree(dev);
err_module_put:
module_put(pdev->dev.parent->driver->owner);
err:
return ret;
}
static int rtl2832_sdr_remove(struct platform_device *pdev)
{
struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
dev_dbg(&pdev->dev, "\n");
mutex_lock(&dev->vb_queue_lock);
mutex_lock(&dev->v4l2_lock);
/* No need to keep the urbs around after disconnection */
dev->udev = NULL;
v4l2_device_disconnect(&dev->v4l2_dev);
video_unregister_device(&dev->vdev);
mutex_unlock(&dev->v4l2_lock);
mutex_unlock(&dev->vb_queue_lock);
v4l2_device_put(&dev->v4l2_dev);
module_put(pdev->dev.parent->driver->owner);
return 0;
}
static struct platform_driver rtl2832_sdr_driver = {
.driver = {
.name = "rtl2832_sdr",
},
.probe = rtl2832_sdr_probe,
.remove = rtl2832_sdr_remove,
};
module_platform_driver(rtl2832_sdr_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
MODULE_LICENSE("GPL");
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