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linux/drivers/media/dvb-frontends/rtl2832_sdr.c
Antti Palosaari d5eec231be [media] rtl2832_sdr: refcount to rtl28xxu 
We are consumer of DVB frontend provided by rtl28xxu module. Due to
that we must use refcount to ensure none could remove rtl28xxu when
we are alive (or when we are streaming, if more fine-grained
refcounting is wanted).

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-02-03 16:22:24 -02:00

1479 lines
40 KiB
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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-vmalloc.h>
#include <linux/platform_device.h>
#include <linux/jiffies.h>
#include <linux/math64.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)");
#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 {
struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
struct list_head list;
};
struct rtl2832_sdr_dev {
#define POWER_ON (1 << 1)
#define URB_BUF (1 << 2)
unsigned long flags;
struct platform_device *pdev;
struct video_device vdev;
struct v4l2_device v4l2_dev;
/* 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;
};
/* write multiple registers */
static int rtl2832_sdr_wr_regs(struct rtl2832_sdr_dev *dev, u16 reg,
const u8 *val, int len)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct i2c_client *client = pdata->i2c_client;
return pdata->bulk_write(client, reg, val, len);
}
#if 0
/* read multiple registers */
static int rtl2832_sdr_rd_regs(struct rtl2832_sdr_dev *dev, u16 reg, u8 *val,
int len)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct i2c_client *client = pdata->i2c_client;
return pdata->bulk_read(client, reg, val, len);
}
#endif
/* write single register */
static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_dev *dev, u16 reg, u8 val)
{
return rtl2832_sdr_wr_regs(dev, reg, &val, 1);
}
/* write single register with mask */
static int rtl2832_sdr_wr_reg_mask(struct rtl2832_sdr_dev *dev, u16 reg,
u8 val, u8 mask)
{
struct platform_device *pdev = dev->pdev;
struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
struct i2c_client *client = pdata->i2c_client;
return pdata->update_bits(client, reg, mask, val);
}
/* 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, 0);
len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
urb->actual_length);
vb2_set_plane_payload(&fbuf->vb, 0, len);
v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
fbuf->vb.v4l2_buf.sequence = dev->sequence++;
vb2_buffer_done(&fbuf->vb, 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_ATOMIC);
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 (dev->flags & USB_STATE_URB_BUF) {
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]);
}
}
dev->flags &= ~USB_STATE_URB_BUF;
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_ATOMIC,
&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]);
dev->flags |= USB_STATE_URB_BUF;
}
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_ATOMIC);
if (!dev->urb_list[i]) {
dev_dbg(&pdev->dev, "failed\n");
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_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,
const struct v4l2_format *fmt, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
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 rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct rtl2832_sdr_frame_buf *buf =
container_of(vb, 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_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 = rtl2832_sdr_wr_regs(dev, 0x13e, "\x00\x00", 2);
if (ret)
goto err;
ret = rtl2832_sdr_wr_regs(dev, 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 = rtl2832_sdr_wr_regs(dev, 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 = rtl2832_sdr_wr_reg(dev, 0x1b1, u8tmp1);
if (ret)
goto err;
ret = rtl2832_sdr_wr_reg(dev, 0x008, u8tmp2);
if (ret)
goto err;
ret = rtl2832_sdr_wr_reg(dev, 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 = rtl2832_sdr_wr_regs(dev, 0x19f, buf, 4);
if (ret)
goto err;
/* low-pass filter */
ret = rtl2832_sdr_wr_regs(dev, 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 = rtl2832_sdr_wr_regs(dev, 0x017, "\x11\x10", 2);
if (ret)
goto err;
/* mode */
ret = rtl2832_sdr_wr_regs(dev, 0x019, "\x05", 1);
if (ret)
goto err;
ret = rtl2832_sdr_wr_regs(dev, 0x01a, "\x1b\x16\x0d\x06\x01\xff", 6);
if (ret)
goto err;
/* FSM */
ret = rtl2832_sdr_wr_regs(dev, 0x192, "\x00\xf0\x0f", 3);
if (ret)
goto err;
/* PID filter */
ret = rtl2832_sdr_wr_regs(dev, 0x061, "\x60", 1);
if (ret)
goto err;
/* used RF tuner based settings */
switch (pdata->tuner) {
case RTL2832_SDR_TUNER_E4000:
ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x30", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xd0", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x18", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xd4", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1e5, "\xf0", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d9, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1db, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1dd, "\x14", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1de, "\xec", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d8, "\x0c", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x83", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x010, "\x49", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x87", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00d, "\x85", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x013, "\x02", 1);
break;
case RTL2832_SDR_TUNER_FC0012:
case RTL2832_SDR_TUNER_FC0013:
ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x2c", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x16", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xe9\xbf", 2);
ret = rtl2832_sdr_wr_regs(dev, 0x1e5, "\xf0", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d9, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1db, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1dd, "\x11", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1de, "\xef", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d8, "\x0c", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1e6, "\x02", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1d7, "\x09", 1);
break;
case RTL2832_SDR_TUNER_R820T:
case RTL2832_SDR_TUNER_R828D:
ret = rtl2832_sdr_wr_regs(dev, 0x112, "\x5a", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x102, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x115, "\x01", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x103, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c7, "\x24", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x104, "\xcc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x105, "\xbe", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c8, "\x14", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x106, "\x35", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1c9, "\x21", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1ca, "\x21", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1cb, "\x00", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x107, "\x40", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1cd, "\x10", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x1ce, "\x10", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x108, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x109, "\x7f", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x10a, "\x80", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x10b, "\x7f", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x00e, "\xfc", 1);
ret = rtl2832_sdr_wr_regs(dev, 0x011, "\xf4", 1);
break;
default:
dev_notice(&pdev->dev, "Unsupported tuner\n");
}
/* software reset */
ret = rtl2832_sdr_wr_reg_mask(dev, 0x101, 0x04, 0x04);
if (ret)
goto err;
ret = rtl2832_sdr_wr_reg_mask(dev, 0x101, 0x00, 0x04);
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 = rtl2832_sdr_wr_regs(dev, 0x061, "\xe0", 1);
if (ret)
goto err;
/* mode */
ret = rtl2832_sdr_wr_regs(dev, 0x019, "\x20", 1);
if (ret)
goto err;
ret = rtl2832_sdr_wr_regs(dev, 0x017, "\x11\x10", 2);
if (ret)
goto err;
/* FSM */
ret = rtl2832_sdr_wr_regs(dev, 0x192, "\x00\x0f\xff", 3);
if (ret)
goto err;
ret = rtl2832_sdr_wr_regs(dev, 0x13e, "\x40\x00", 2);
if (ret)
goto err;
ret = rtl2832_sdr_wr_regs(dev, 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 (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);
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);
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 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;
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;
} 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;
} else {
return -EINVAL;
}
return 0;
}
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;
dev_dbg(&pdev->dev, "\n");
if (v->index > 1)
return -EINVAL;
return 0;
}
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;
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];
} else if (band->tuner == 1) {
if (band->index >= ARRAY_SIZE(bands_fm))
return -EINVAL;
*band = bands_fm[band->index];
} else {
return -EINVAL;
}
return 0;
}
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 = 0;
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;
} else if (f->tuner == 1) {
f->frequency = dev->f_tuner;
f->type = V4L2_TUNER_RF;
} else {
return -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) {
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->pdev = pdev;
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;
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",
.owner = THIS_MODULE,
},
.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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