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Fixed MTP to work with TWRP

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awab228 2018-06-19 23:16:04 +02:00
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37
drivers/media/radio/si470x/Kconfig Normal file
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config USB_SI470X
tristate "Silicon Labs Si470x FM Radio Receiver support with USB"
depends on USB && RADIO_SI470X
---help---
This is a driver for USB devices with the Silicon Labs SI470x
chip. Currently these devices are known to work:
- 10c4:818a: Silicon Labs USB FM Radio Reference Design
- 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music)
- 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
- 10c5:819a: Sanei Electric FM USB Radio (aka DealExtreme.com PCear)
Sound is provided by the ALSA USB Audio/MIDI driver. Therefore
if you don't want to use the device solely for RDS receiving,
it is recommended to also select SND_USB_AUDIO.
Please have a look at the documentation, especially on how
to redirect the audio stream from the radio to your sound device:
Documentation/video4linux/si470x.txt
Say Y here if you want to connect this type of radio to your
computer's USB port.
To compile this driver as a module, choose M here: the
module will be called radio-usb-si470x.
config I2C_SI470X
tristate "Silicon Labs Si470x FM Radio Receiver support with I2C"
depends on I2C && RADIO_SI470X && !USB_SI470X
---help---
This is a driver for I2C devices with the Silicon Labs SI470x
chip.
Say Y here if you want to connect this type of radio to your
computer's I2C port.
To compile this driver as a module, choose M here: the
module will be called radio-i2c-si470x.

9
drivers/media/radio/si470x/Makefile Normal file
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#
# Makefile for radios with Silicon Labs Si470x FM Radio Receivers
#
radio-usb-si470x-objs := radio-si470x-usb.o radio-si470x-common.o
radio-i2c-si470x-objs := radio-si470x-i2c.o radio-si470x-common.o
obj-$(CONFIG_USB_SI470X) += radio-usb-si470x.o
obj-$(CONFIG_I2C_SI470X) += radio-i2c-si470x.o

759
drivers/media/radio/si470x/radio-si470x-common.c Normal file
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/*
* drivers/media/radio/si470x/radio-si470x-common.c
*
* Driver for radios with Silicon Labs Si470x FM Radio Receivers
*
* Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
* Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* History:
* 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.0
* - First working version
* 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.1
* - Improved error handling, every function now returns errno
* - Improved multi user access (start/mute/stop)
* - Channel doesn't get lost anymore after start/mute/stop
* - RDS support added (polling mode via interrupt EP 1)
* - marked default module parameters with *value*
* - switched from bit structs to bit masks
* - header file cleaned and integrated
* 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.2
* - hex values are now lower case
* - commented USB ID for ADS/Tech moved on todo list
* - blacklisted si470x in hid-quirks.c
* - rds buffer handling functions integrated into *_work, *_read
* - rds_command in si470x_poll exchanged against simple retval
* - check for firmware version 15
* - code order and prototypes still remain the same
* - spacing and bottom of band codes remain the same
* 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.3
* - code reordered to avoid function prototypes
* - switch/case defaults are now more user-friendly
* - unified comment style
* - applied all checkpatch.pl v1.12 suggestions
* except the warning about the too long lines with bit comments
* - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
* 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.4
* - avoid poss. locking when doing copy_to_user which may sleep
* - RDS is automatically activated on read now
* - code cleaned of unnecessary rds_commands
* - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
* (thanks to Guillaume RAMOUSSE)
* 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.5
* - number of seek_retries changed to tune_timeout
* - fixed problem with incomplete tune operations by own buffers
* - optimization of variables and printf types
* - improved error logging
* 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
* Oliver Neukum <oliver@neukum.org>
* Version 1.0.6
* - fixed coverity checker warnings in *_usb_driver_disconnect
* - probe()/open() race by correct ordering in probe()
* - DMA coherency rules by separate allocation of all buffers
* - use of endianness macros
* - abuse of spinlock, replaced by mutex
* - racy handling of timer in disconnect,
* replaced by delayed_work
* - racy interruptible_sleep_on(),
* replaced with wait_event_interruptible()
* - handle signals in read()
* 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
* Oliver Neukum <oliver@neukum.org>
* Version 1.0.7
* - usb autosuspend support
* - unplugging fixed
* 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
* Version 1.0.8
* - hardware frequency seek support
* - afc indication
* - more safety checks, let si470x_get_freq return errno
* - vidioc behavior corrected according to v4l2 spec
* 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
* - add support for KWorld USB FM Radio FM700
* - blacklisted KWorld radio in hid-core.c and hid-ids.h
* 2008-12-03 Mark Lord <mlord@pobox.com>
* - add support for DealExtreme USB Radio
* 2009-01-31 Bob Ross <pigiron@gmx.com>
* - correction of stereo detection/setting
* - correction of signal strength indicator scaling
* 2009-01-31 Rick Bronson <rick@efn.org>
* Tobias Lorenz <tobias.lorenz@gmx.net>
* - add LED status output
* - get HW/SW version from scratchpad
* 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
* Version 1.0.10
* - add support for interrupt mode for RDS endpoint,
* instead of polling.
* Improves RDS reception significantly
*/
/* kernel includes */
#include "radio-si470x.h"
/**************************************************************************
* Module Parameters
**************************************************************************/
/* Spacing (kHz) */
/* 0: 200 kHz (USA, Australia) */
/* 1: 100 kHz (Europe, Japan) */
/* 2: 50 kHz */
static unsigned short space = 2;
module_param(space, ushort, 0444);
MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
/* De-emphasis */
/* 0: 75 us (USA) */
/* 1: 50 us (Europe, Australia, Japan) */
static unsigned short de = 1;
module_param(de, ushort, 0444);
MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
/* Tune timeout */
static unsigned int tune_timeout = 3000;
module_param(tune_timeout, uint, 0644);
MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
/* Seek timeout */
static unsigned int seek_timeout = 5000;
module_param(seek_timeout, uint, 0644);
MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
static const struct v4l2_frequency_band bands[] = {
{
.type = V4L2_TUNER_RADIO,
.index = 0,
.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
V4L2_TUNER_CAP_FREQ_BANDS |
V4L2_TUNER_CAP_HWSEEK_BOUNDED |
V4L2_TUNER_CAP_HWSEEK_WRAP,
.rangelow = 87500 * 16,
.rangehigh = 108000 * 16,
.modulation = V4L2_BAND_MODULATION_FM,
},
{
.type = V4L2_TUNER_RADIO,
.index = 1,
.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
V4L2_TUNER_CAP_FREQ_BANDS |
V4L2_TUNER_CAP_HWSEEK_BOUNDED |
V4L2_TUNER_CAP_HWSEEK_WRAP,
.rangelow = 76000 * 16,
.rangehigh = 108000 * 16,
.modulation = V4L2_BAND_MODULATION_FM,
},
{
.type = V4L2_TUNER_RADIO,
.index = 2,
.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
V4L2_TUNER_CAP_FREQ_BANDS |
V4L2_TUNER_CAP_HWSEEK_BOUNDED |
V4L2_TUNER_CAP_HWSEEK_WRAP,
.rangelow = 76000 * 16,
.rangehigh = 90000 * 16,
.modulation = V4L2_BAND_MODULATION_FM,
},
};
/**************************************************************************
* Generic Functions
**************************************************************************/
/*
* si470x_set_band - set the band
*/
static int si470x_set_band(struct si470x_device *radio, int band)
{
if (radio->band == band)
return 0;
radio->band = band;
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_BAND;
radio->registers[SYSCONFIG2] |= radio->band << 6;
return si470x_set_register(radio, SYSCONFIG2);
}
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
bool timed_out = false;
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
retval = si470x_set_register(radio, CHANNEL);
if (retval < 0)
goto done;
/* wait till tune operation has completed */
reinit_completion(&radio->completion);
retval = wait_for_completion_timeout(&radio->completion,
msecs_to_jiffies(tune_timeout));
if (!retval)
timed_out = true;
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev.dev, "tune does not complete\n");
if (timed_out)
dev_warn(&radio->videodev.dev,
"tune timed out after %u ms\n", tune_timeout);
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
retval = si470x_set_register(radio, CHANNEL);
done:
return retval;
}
/*
* si470x_get_step - get channel spacing
*/
static unsigned int si470x_get_step(struct si470x_device *radio)
{
/* Spacing (kHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
/* 0: 200 kHz (USA, Australia) */
case 0:
return 200 * 16;
/* 1: 100 kHz (Europe, Japan) */
case 1:
return 100 * 16;
/* 2: 50 kHz */
default:
return 50 * 16;
}
}
/*
* si470x_get_freq - get the frequency
*/
static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
{
int chan, retval;
/* read channel */
retval = si470x_get_register(radio, READCHAN);
chan = radio->registers[READCHAN] & READCHAN_READCHAN;
/* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
*freq = chan * si470x_get_step(radio) + bands[radio->band].rangelow;
return retval;
}
/*
* si470x_set_freq - set the frequency
*/
int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
{
unsigned short chan;
freq = clamp(freq, bands[radio->band].rangelow,
bands[radio->band].rangehigh);
/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
chan = (freq - bands[radio->band].rangelow) / si470x_get_step(radio);
return si470x_set_chan(radio, chan);
}
/*
* si470x_set_seek - set seek
*/
static int si470x_set_seek(struct si470x_device *radio,
const struct v4l2_hw_freq_seek *seek)
{
int band, retval;
unsigned int freq;
bool timed_out = false;
/* set band */
if (seek->rangelow || seek->rangehigh) {
for (band = 0; band < ARRAY_SIZE(bands); band++) {
if (bands[band].rangelow == seek->rangelow &&
bands[band].rangehigh == seek->rangehigh)
break;
}
if (band == ARRAY_SIZE(bands))
return -EINVAL; /* No matching band found */
} else
band = 1; /* If nothing is specified seek 76 - 108 Mhz */
if (radio->band != band) {
retval = si470x_get_freq(radio, &freq);
if (retval)
return retval;
retval = si470x_set_band(radio, band);
if (retval)
return retval;
retval = si470x_set_freq(radio, freq);
if (retval)
return retval;
}
/* start seeking */
radio->registers[POWERCFG] |= POWERCFG_SEEK;
if (seek->wrap_around)
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
else
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
if (seek->seek_upward)
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
else
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
return retval;
/* wait till tune operation has completed */
reinit_completion(&radio->completion);
retval = wait_for_completion_timeout(&radio->completion,
msecs_to_jiffies(seek_timeout));
if (!retval)
timed_out = true;
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
dev_warn(&radio->videodev.dev, "seek does not complete\n");
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
dev_warn(&radio->videodev.dev,
"seek failed / band limit reached\n");
/* stop seeking */
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
retval = si470x_set_register(radio, POWERCFG);
/* try again, if timed out */
if (retval == 0 && timed_out)
return -ENODATA;
return retval;
}
/*
* si470x_start - switch on radio
*/
int si470x_start(struct si470x_device *radio)
{
int retval;
/* powercfg */
radio->registers[POWERCFG] =
POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
goto done;
/* sysconfig 1 */
radio->registers[SYSCONFIG1] =
(de << 11) & SYSCONFIG1_DE; /* DE*/
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
goto done;
/* sysconfig 2 */
radio->registers[SYSCONFIG2] =
(0x1f << 8) | /* SEEKTH */
((radio->band << 6) & SYSCONFIG2_BAND) |/* BAND */
((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
15; /* VOLUME (max) */
retval = si470x_set_register(radio, SYSCONFIG2);
if (retval < 0)
goto done;
/* reset last channel */
retval = si470x_set_chan(radio,
radio->registers[CHANNEL] & CHANNEL_CHAN);
done:
return retval;
}
/*
* si470x_stop - switch off radio
*/
int si470x_stop(struct si470x_device *radio)
{
int retval;
/* sysconfig 1 */
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
goto done;
/* powercfg */
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
/* POWERCFG_ENABLE has to automatically go low */
radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
retval = si470x_set_register(radio, POWERCFG);
done:
return retval;
}
/*
* si470x_rds_on - switch on rds reception
*/
static int si470x_rds_on(struct si470x_device *radio)
{
int retval;
/* sysconfig 1 */
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
return retval;
}
/**************************************************************************
* File Operations Interface
**************************************************************************/
/*
* si470x_fops_read - read RDS data
*/
static ssize_t si470x_fops_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
unsigned int block_count = 0;
/* switch on rds reception */
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
si470x_rds_on(radio);
/* block if no new data available */
while (radio->wr_index == radio->rd_index) {
if (file->f_flags & O_NONBLOCK) {
retval = -EWOULDBLOCK;
goto done;
}
if (wait_event_interruptible(radio->read_queue,
radio->wr_index != radio->rd_index) < 0) {
retval = -EINTR;
goto done;
}
}
/* calculate block count from byte count */
count /= 3;
/* copy RDS block out of internal buffer and to user buffer */
while (block_count < count) {
if (radio->rd_index == radio->wr_index)
break;
/* always transfer rds complete blocks */
if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
/* retval = -EFAULT; */
break;
/* increment and wrap read pointer */
radio->rd_index += 3;
if (radio->rd_index >= radio->buf_size)
radio->rd_index = 0;
/* increment counters */
block_count++;
buf += 3;
retval += 3;
}
done:
return retval;
}
/*
* si470x_fops_poll - poll RDS data
*/
static unsigned int si470x_fops_poll(struct file *file,
struct poll_table_struct *pts)
{
struct si470x_device *radio = video_drvdata(file);
unsigned long req_events = poll_requested_events(pts);
int retval = v4l2_ctrl_poll(file, pts);
if (req_events & (POLLIN | POLLRDNORM)) {
/* switch on rds reception */
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
si470x_rds_on(radio);
poll_wait(file, &radio->read_queue, pts);
if (radio->rd_index != radio->wr_index)
retval |= POLLIN | POLLRDNORM;
}
return retval;
}
/*
* si470x_fops - file operations interface
*/
static const struct v4l2_file_operations si470x_fops = {
.owner = THIS_MODULE,
.read = si470x_fops_read,
.poll = si470x_fops_poll,
.unlocked_ioctl = video_ioctl2,
.open = si470x_fops_open,
.release = si470x_fops_release,
};
/**************************************************************************
* Video4Linux Interface
**************************************************************************/
static int si470x_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct si470x_device *radio =
container_of(ctrl->handler, struct si470x_device, hdl);
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->val;
return si470x_set_register(radio, SYSCONFIG2);
case V4L2_CID_AUDIO_MUTE:
if (ctrl->val)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
return si470x_set_register(radio, POWERCFG);
default:
return -EINVAL;
}
}
/*
* si470x_vidioc_g_tuner - get tuner attributes
*/
static int si470x_vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
if (tuner->index != 0)
return -EINVAL;
if (!radio->status_rssi_auto_update) {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
return retval;
}
/* driver constants */
strcpy(tuner->name, "FM");
tuner->type = V4L2_TUNER_RADIO;
tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
V4L2_TUNER_CAP_HWSEEK_BOUNDED |
V4L2_TUNER_CAP_HWSEEK_WRAP;
tuner->rangelow = 76 * FREQ_MUL;
tuner->rangehigh = 108 * FREQ_MUL;
/* stereo indicator == stereo (instead of mono) */
if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
else
tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
/* If there is a reliable method of detecting an RDS channel,
then this code should check for that before setting this
RDS subchannel. */
tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
/* mono/stereo selector */
if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
tuner->audmode = V4L2_TUNER_MODE_STEREO;
else
tuner->audmode = V4L2_TUNER_MODE_MONO;
/* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
/* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */
tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
/* the ideal factor is 0xffff/75 = 873,8 */
tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
if (tuner->signal > 0xffff)
tuner->signal = 0xffff;
/* automatic frequency control: -1: freq to low, 1 freq to high */
/* AFCRL does only indicate that freq. differs, not if too low/high */
tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
return retval;
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
if (tuner->index != 0)
return -EINVAL;
/* mono/stereo selector */
switch (tuner->audmode) {
case V4L2_TUNER_MODE_MONO:
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
break;
case V4L2_TUNER_MODE_STEREO:
default:
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
break;
}
return si470x_set_register(radio, POWERCFG);
}
/*
* si470x_vidioc_g_frequency - get tuner or modulator radio frequency
*/
static int si470x_vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *freq)
{
struct si470x_device *radio = video_drvdata(file);
if (freq->tuner != 0)
return -EINVAL;
freq->type = V4L2_TUNER_RADIO;
return si470x_get_freq(radio, &freq->frequency);
}
/*
* si470x_vidioc_s_frequency - set tuner or modulator radio frequency
*/
static int si470x_vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *freq)
{
struct si470x_device *radio = video_drvdata(file);
int retval;
if (freq->tuner != 0)
return -EINVAL;
if (freq->frequency < bands[radio->band].rangelow ||
freq->frequency > bands[radio->band].rangehigh) {
/* Switch to band 1 which covers everything we support */
retval = si470x_set_band(radio, 1);
if (retval)
return retval;
}
return si470x_set_freq(radio, freq->frequency);
}
/*
* si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
*/
static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
const struct v4l2_hw_freq_seek *seek)
{
struct si470x_device *radio = video_drvdata(file);
if (seek->tuner != 0)
return -EINVAL;
if (file->f_flags & O_NONBLOCK)
return -EWOULDBLOCK;
return si470x_set_seek(radio, seek);
}
/*
* si470x_vidioc_enum_freq_bands - enumerate supported bands
*/
static int si470x_vidioc_enum_freq_bands(struct file *file, void *priv,
struct v4l2_frequency_band *band)
{
if (band->tuner != 0)
return -EINVAL;
if (band->index >= ARRAY_SIZE(bands))
return -EINVAL;
*band = bands[band->index];
return 0;
}
const struct v4l2_ctrl_ops si470x_ctrl_ops = {
.s_ctrl = si470x_s_ctrl,
};
/*
* si470x_ioctl_ops - video device ioctl operations
*/
static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
.vidioc_querycap = si470x_vidioc_querycap,
.vidioc_g_tuner = si470x_vidioc_g_tuner,
.vidioc_s_tuner = si470x_vidioc_s_tuner,
.vidioc_g_frequency = si470x_vidioc_g_frequency,
.vidioc_s_frequency = si470x_vidioc_s_frequency,
.vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
.vidioc_enum_freq_bands = si470x_vidioc_enum_freq_bands,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/*
* si470x_viddev_template - video device interface
*/
struct video_device si470x_viddev_template = {
.fops = &si470x_fops,
.name = DRIVER_NAME,
.release = video_device_release_empty,
.ioctl_ops = &si470x_ioctl_ops,
};

526
drivers/media/radio/si470x/radio-si470x-i2c.c Normal file
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@ -0,0 +1,526 @@
/*
* drivers/media/radio/si470x/radio-si470x-i2c.c
*
* I2C driver for radios with Silicon Labs Si470x FM Radio Receivers
*
* Copyright (c) 2009 Samsung Electronics Co.Ltd
* Author: Joonyoung Shim <jy0922.shim@samsung.com>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* driver definitions */
#define DRIVER_AUTHOR "Joonyoung Shim <jy0922.shim@samsung.com>";
#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
#define DRIVER_DESC "I2C radio driver for Si470x FM Radio Receivers"
#define DRIVER_VERSION "1.0.2"
/* kernel includes */
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include "radio-si470x.h"
/* I2C Device ID List */
static const struct i2c_device_id si470x_i2c_id[] = {
/* Generic Entry */
{ "si470x", 0 },
/* Terminating entry */
{ }
};
MODULE_DEVICE_TABLE(i2c, si470x_i2c_id);
/**************************************************************************
* Module Parameters
**************************************************************************/
/* Radio Nr */
static int radio_nr = -1;
module_param(radio_nr, int, 0444);
MODULE_PARM_DESC(radio_nr, "Radio Nr");
/* RDS buffer blocks */
static unsigned int rds_buf = 100;
module_param(rds_buf, uint, 0444);
MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
/* RDS maximum block errors */
static unsigned short max_rds_errors = 1;
/* 0 means 0 errors requiring correction */
/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
/* 2 means 3-5 errors requiring correction */
/* 3 means 6+ errors or errors in checkword, correction not possible */
module_param(max_rds_errors, ushort, 0644);
MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
/**************************************************************************
* I2C Definitions
**************************************************************************/
/* Write starts with the upper byte of register 0x02 */
#define WRITE_REG_NUM 8
#define WRITE_INDEX(i) (i + 0x02)
/* Read starts with the upper byte of register 0x0a */
#define READ_REG_NUM RADIO_REGISTER_NUM
#define READ_INDEX(i) ((i + RADIO_REGISTER_NUM - 0x0a) % READ_REG_NUM)
/**************************************************************************
* General Driver Functions - REGISTERs
**************************************************************************/
/*
* si470x_get_register - read register
*/
int si470x_get_register(struct si470x_device *radio, int regnr)
{
u16 buf[READ_REG_NUM];
struct i2c_msg msgs[1] = {
{
.addr = radio->client->addr,
.flags = I2C_M_RD,
.len = sizeof(u16) * READ_REG_NUM,
.buf = (void *)buf
},
};
if (i2c_transfer(radio->client->adapter, msgs, 1) != 1)
return -EIO;
radio->registers[regnr] = __be16_to_cpu(buf[READ_INDEX(regnr)]);
return 0;
}
/*
* si470x_set_register - write register
*/
int si470x_set_register(struct si470x_device *radio, int regnr)
{
int i;
u16 buf[WRITE_REG_NUM];
struct i2c_msg msgs[1] = {
{
.addr = radio->client->addr,
.len = sizeof(u16) * WRITE_REG_NUM,
.buf = (void *)buf
},
};
for (i = 0; i < WRITE_REG_NUM; i++)
buf[i] = __cpu_to_be16(radio->registers[WRITE_INDEX(i)]);
if (i2c_transfer(radio->client->adapter, msgs, 1) != 1)
return -EIO;
return 0;
}
/**************************************************************************
* General Driver Functions - ENTIRE REGISTERS
**************************************************************************/
/*
* si470x_get_all_registers - read entire registers
*/
static int si470x_get_all_registers(struct si470x_device *radio)
{
int i;
u16 buf[READ_REG_NUM];
struct i2c_msg msgs[1] = {
{
.addr = radio->client->addr,
.flags = I2C_M_RD,
.len = sizeof(u16) * READ_REG_NUM,
.buf = (void *)buf
},
};
if (i2c_transfer(radio->client->adapter, msgs, 1) != 1)
return -EIO;
for (i = 0; i < READ_REG_NUM; i++)
radio->registers[i] = __be16_to_cpu(buf[READ_INDEX(i)]);
return 0;
}
/**************************************************************************
* File Operations Interface
**************************************************************************/
/*
* si470x_fops_open - file open
*/
int si470x_fops_open(struct file *file)
{
struct si470x_device *radio = video_drvdata(file);
int retval = v4l2_fh_open(file);
if (retval)
return retval;
if (v4l2_fh_is_singular_file(file)) {
/* start radio */
retval = si470x_start(radio);
if (retval < 0)
goto done;
/* enable RDS / STC interrupt */
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDSIEN;
radio->registers[SYSCONFIG1] |= SYSCONFIG1_STCIEN;
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_GPIO2;
radio->registers[SYSCONFIG1] |= 0x1 << 2;
retval = si470x_set_register(radio, SYSCONFIG1);
}
done:
if (retval)
v4l2_fh_release(file);
return retval;
}
/*
* si470x_fops_release - file release
*/
int si470x_fops_release(struct file *file)
{
struct si470x_device *radio = video_drvdata(file);
if (v4l2_fh_is_singular_file(file))
/* stop radio */
si470x_stop(radio);
return v4l2_fh_release(file);
}
/**************************************************************************
* Video4Linux Interface
**************************************************************************/
/*
* si470x_vidioc_querycap - query device capabilities
*/
int si470x_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *capability)
{
strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE |
V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
/**************************************************************************
* I2C Interface
**************************************************************************/
/*
* si470x_i2c_interrupt - interrupt handler
*/
static irqreturn_t si470x_i2c_interrupt(int irq, void *dev_id)
{
struct si470x_device *radio = dev_id;
unsigned char regnr;
unsigned char blocknum;
unsigned short bler; /* rds block errors */
unsigned short rds;
unsigned char tmpbuf[3];
int retval = 0;
/* check Seek/Tune Complete */
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto end;
if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
complete(&radio->completion);
/* safety checks */
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
goto end;
/* Update RDS registers */
for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++) {
retval = si470x_get_register(radio, STATUSRSSI + regnr);
if (retval < 0)
goto end;
}
/* get rds blocks */
if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0)
/* No RDS group ready, better luck next time */
goto end;
for (blocknum = 0; blocknum < 4; blocknum++) {
switch (blocknum) {
default:
bler = (radio->registers[STATUSRSSI] &
STATUSRSSI_BLERA) >> 9;
rds = radio->registers[RDSA];
break;
case 1:
bler = (radio->registers[READCHAN] &
READCHAN_BLERB) >> 14;
rds = radio->registers[RDSB];
break;
case 2:
bler = (radio->registers[READCHAN] &
READCHAN_BLERC) >> 12;
rds = radio->registers[RDSC];
break;
case 3:
bler = (radio->registers[READCHAN] &
READCHAN_BLERD) >> 10;
rds = radio->registers[RDSD];
break;
}
/* Fill the V4L2 RDS buffer */
put_unaligned_le16(rds, &tmpbuf);
tmpbuf[2] = blocknum; /* offset name */
tmpbuf[2] |= blocknum << 3; /* received offset */
if (bler > max_rds_errors)
tmpbuf[2] |= 0x80; /* uncorrectable errors */
else if (bler > 0)
tmpbuf[2] |= 0x40; /* corrected error(s) */
/* copy RDS block to internal buffer */
memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
radio->wr_index += 3;
/* wrap write pointer */
if (radio->wr_index >= radio->buf_size)
radio->wr_index = 0;
/* check for overflow */
if (radio->wr_index == radio->rd_index) {
/* increment and wrap read pointer */
radio->rd_index += 3;
if (radio->rd_index >= radio->buf_size)
radio->rd_index = 0;
}
}
if (radio->wr_index != radio->rd_index)
wake_up_interruptible(&radio->read_queue);
end:
return IRQ_HANDLED;
}
/*
* si470x_i2c_probe - probe for the device
*/
static int si470x_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct si470x_device *radio;
int retval = 0;
unsigned char version_warning = 0;
/* private data allocation and initialization */
radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
if (!radio) {
retval = -ENOMEM;
goto err_initial;
}
radio->client = client;
radio->band = 1; /* Default to 76 - 108 MHz */
mutex_init(&radio->lock);
init_completion(&radio->completion);
/* video device initialization */
radio->videodev = si470x_viddev_template;
video_set_drvdata(&radio->videodev, radio);
/* power up : need 110ms */
radio->registers[POWERCFG] = POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0) {
retval = -EIO;
goto err_radio;
}
msleep(110);
/* get device and chip versions */
if (si470x_get_all_registers(radio) < 0) {
retval = -EIO;
goto err_radio;
}
dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
radio->registers[DEVICEID], radio->registers[CHIPID]);
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
dev_warn(&client->dev,
"This driver is known to work with "
"firmware version %hu,\n", RADIO_FW_VERSION);
dev_warn(&client->dev,
"but the device has firmware version %hu.\n",
radio->registers[CHIPID] & CHIPID_FIRMWARE);
version_warning = 1;
}
/* give out version warning */
if (version_warning == 1) {
dev_warn(&client->dev,
"If you have some trouble using this driver,\n");
dev_warn(&client->dev,
"please report to V4L ML at "
"linux-media@vger.kernel.org\n");
}
/* set initial frequency */
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
/* rds buffer allocation */
radio->buf_size = rds_buf * 3;
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
retval = -EIO;
goto err_radio;
}
/* rds buffer configuration */
radio->wr_index = 0;
radio->rd_index = 0;
init_waitqueue_head(&radio->read_queue);
retval = request_threaded_irq(client->irq, NULL, si470x_i2c_interrupt,
IRQF_TRIGGER_FALLING, DRIVER_NAME, radio);
if (retval) {
dev_err(&client->dev, "Failed to register interrupt\n");
goto err_rds;
}
/* register video device */
retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
radio_nr);
if (retval) {
dev_warn(&client->dev, "Could not register video device\n");
goto err_all;
}
i2c_set_clientdata(client, radio);
return 0;
err_all:
free_irq(client->irq, radio);
err_rds:
kfree(radio->buffer);
err_radio:
kfree(radio);
err_initial:
return retval;
}
/*
* si470x_i2c_remove - remove the device
*/
static int si470x_i2c_remove(struct i2c_client *client)
{
struct si470x_device *radio = i2c_get_clientdata(client);
free_irq(client->irq, radio);
video_unregister_device(&radio->videodev);
kfree(radio);
return 0;
}
#ifdef CONFIG_PM_SLEEP
/*
* si470x_i2c_suspend - suspend the device
*/
static int si470x_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct si470x_device *radio = i2c_get_clientdata(client);
/* power down */
radio->registers[POWERCFG] |= POWERCFG_DISABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
return 0;
}
/*
* si470x_i2c_resume - resume the device
*/
static int si470x_i2c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct si470x_device *radio = i2c_get_clientdata(client);
/* power up : need 110ms */
radio->registers[POWERCFG] |= POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0)
return -EIO;
msleep(110);
return 0;
}
static SIMPLE_DEV_PM_OPS(si470x_i2c_pm, si470x_i2c_suspend, si470x_i2c_resume);
#endif
/*
* si470x_i2c_driver - i2c driver interface
*/
static struct i2c_driver si470x_i2c_driver = {
.driver = {
.name = "si470x",
.owner = THIS_MODULE,
#ifdef CONFIG_PM_SLEEP
.pm = &si470x_i2c_pm,
#endif
},
.probe = si470x_i2c_probe,
.remove = si470x_i2c_remove,
.id_table = si470x_i2c_id,
};
module_i2c_driver(si470x_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);

864
drivers/media/radio/si470x/radio-si470x-usb.c Normal file
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@ -0,0 +1,864 @@
/*
* drivers/media/radio/si470x/radio-si470x-usb.c
*
* USB driver for radios with Silicon Labs Si470x FM Radio Receivers
*
* Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* ToDo:
* - add firmware download/update support
*/
/* driver definitions */
#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
#define DRIVER_VERSION "1.0.10"
/* kernel includes */
#include <linux/usb.h>
#include <linux/hid.h>
#include <linux/slab.h>
#include "radio-si470x.h"
/* USB Device ID List */
static struct usb_device_id si470x_usb_driver_id_table[] = {
/* Silicon Labs USB FM Radio Reference Design */
{ USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
/* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
{ USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) },
/* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */
{ USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) },
/* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */
{ USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) },
/* Axentia ALERT FM USB Receiver */
{ USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID, 0, 0) },
/* Terminating entry */
{ }
};
MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
/**************************************************************************
* Module Parameters
**************************************************************************/
/* Radio Nr */
static int radio_nr = -1;
module_param(radio_nr, int, 0444);
MODULE_PARM_DESC(radio_nr, "Radio Nr");
/* USB timeout */
static unsigned int usb_timeout = 500;
module_param(usb_timeout, uint, 0644);
MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
/* RDS buffer blocks */
static unsigned int rds_buf = 100;
module_param(rds_buf, uint, 0444);
MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
/* RDS maximum block errors */
static unsigned short max_rds_errors = 1;
/* 0 means 0 errors requiring correction */
/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
/* 2 means 3-5 errors requiring correction */
/* 3 means 6+ errors or errors in checkword, correction not possible */
module_param(max_rds_errors, ushort, 0644);
MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
/**************************************************************************
* USB HID Reports
**************************************************************************/
/* Reports 1-16 give direct read/write access to the 16 Si470x registers */
/* with the (REPORT_ID - 1) corresponding to the register address across USB */
/* endpoint 0 using GET_REPORT and SET_REPORT */
#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
#define REGISTER_REPORT(reg) ((reg) + 1)
/* Report 17 gives direct read/write access to the entire Si470x register */
/* map across endpoint 0 using GET_REPORT and SET_REPORT */
#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
#define ENTIRE_REPORT 17
/* Report 18 is used to send the lowest 6 Si470x registers up the HID */
/* interrupt endpoint 1 to Windows every 20 milliseconds for status */
#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
#define RDS_REPORT 18
/* Report 19: LED state */
#define LED_REPORT_SIZE 3
#define LED_REPORT 19
/* Report 19: stream */
#define STREAM_REPORT_SIZE 3
#define STREAM_REPORT 19
/* Report 20: scratch */
#define SCRATCH_PAGE_SIZE 63
#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
#define SCRATCH_REPORT 20
/* Reports 19-22: flash upgrade of the C8051F321 */
#define WRITE_REPORT_SIZE 4
#define WRITE_REPORT 19
#define FLASH_REPORT_SIZE 64
#define FLASH_REPORT 20
#define CRC_REPORT_SIZE 3
#define CRC_REPORT 21
#define RESPONSE_REPORT_SIZE 2
#define RESPONSE_REPORT 22
/* Report 23: currently unused, but can accept 60 byte reports on the HID */
/* interrupt out endpoint 2 every 1 millisecond */
#define UNUSED_REPORT 23
#define MAX_REPORT_SIZE 64
/**************************************************************************
* Software/Hardware Versions from Scratch Page
**************************************************************************/
#define RADIO_HW_VERSION 1
/**************************************************************************
* LED State Definitions
**************************************************************************/
#define LED_COMMAND 0x35
#define NO_CHANGE_LED 0x00
#define ALL_COLOR_LED 0x01 /* streaming state */
#define BLINK_GREEN_LED 0x02 /* connect state */
#define BLINK_RED_LED 0x04
#define BLINK_ORANGE_LED 0x10 /* disconnect state */
#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
#define SOLID_RED_LED 0x40 /* bootload state */
#define SOLID_ORANGE_LED 0x80
/**************************************************************************
* Stream State Definitions
**************************************************************************/
#define STREAM_COMMAND 0x36
#define STREAM_VIDPID 0x00
#define STREAM_AUDIO 0xff
/**************************************************************************
* Bootloader / Flash Commands
**************************************************************************/
/* unique id sent to bootloader and required to put into a bootload state */
#define UNIQUE_BL_ID 0x34
/* mask for the flash data */
#define FLASH_DATA_MASK 0x55
/* bootloader commands */
#define GET_SW_VERSION_COMMAND 0x00
#define SET_PAGE_COMMAND 0x01
#define ERASE_PAGE_COMMAND 0x02
#define WRITE_PAGE_COMMAND 0x03
#define CRC_ON_PAGE_COMMAND 0x04
#define READ_FLASH_BYTE_COMMAND 0x05
#define RESET_DEVICE_COMMAND 0x06
#define GET_HW_VERSION_COMMAND 0x07
#define BLANK 0xff
/* bootloader command responses */
#define COMMAND_OK 0x01
#define COMMAND_FAILED 0x02
#define COMMAND_PENDING 0x03
/**************************************************************************
* General Driver Functions - REGISTER_REPORTs
**************************************************************************/
/*
* si470x_get_report - receive a HID report
*/
static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
{
unsigned char *report = buf;
int retval;
retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
HID_REQ_GET_REPORT,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
report[0], 2,
buf, size, usb_timeout);
if (retval < 0)
dev_warn(&radio->intf->dev,
"si470x_get_report: usb_control_msg returned %d\n",
retval);
return retval;
}
/*
* si470x_set_report - send a HID report
*/
static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
{
unsigned char *report = buf;
int retval;
retval = usb_control_msg(radio->usbdev,
usb_sndctrlpipe(radio->usbdev, 0),
HID_REQ_SET_REPORT,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
report[0], 2,
buf, size, usb_timeout);
if (retval < 0)
dev_warn(&radio->intf->dev,
"si470x_set_report: usb_control_msg returned %d\n",
retval);
return retval;
}
/*
* si470x_get_register - read register
*/
int si470x_get_register(struct si470x_device *radio, int regnr)
{
int retval;
radio->usb_buf[0] = REGISTER_REPORT(regnr);
retval = si470x_get_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE);
if (retval >= 0)
radio->registers[regnr] = get_unaligned_be16(&radio->usb_buf[1]);
return (retval < 0) ? -EINVAL : 0;
}
/*
* si470x_set_register - write register
*/
int si470x_set_register(struct si470x_device *radio, int regnr)
{
int retval;
radio->usb_buf[0] = REGISTER_REPORT(regnr);
put_unaligned_be16(radio->registers[regnr], &radio->usb_buf[1]);
retval = si470x_set_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE);
return (retval < 0) ? -EINVAL : 0;
}
/**************************************************************************
* General Driver Functions - ENTIRE_REPORT
**************************************************************************/
/*
* si470x_get_all_registers - read entire registers
*/
static int si470x_get_all_registers(struct si470x_device *radio)
{
int retval;
unsigned char regnr;
radio->usb_buf[0] = ENTIRE_REPORT;
retval = si470x_get_report(radio, radio->usb_buf, ENTIRE_REPORT_SIZE);
if (retval >= 0)
for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
radio->registers[regnr] = get_unaligned_be16(
&radio->usb_buf[regnr * RADIO_REGISTER_SIZE + 1]);
return (retval < 0) ? -EINVAL : 0;
}
/**************************************************************************
* General Driver Functions - LED_REPORT
**************************************************************************/
/*
* si470x_set_led_state - sets the led state
*/
static int si470x_set_led_state(struct si470x_device *radio,
unsigned char led_state)
{
int retval;
radio->usb_buf[0] = LED_REPORT;
radio->usb_buf[1] = LED_COMMAND;
radio->usb_buf[2] = led_state;
retval = si470x_set_report(radio, radio->usb_buf, LED_REPORT_SIZE);
return (retval < 0) ? -EINVAL : 0;
}
/**************************************************************************
* General Driver Functions - SCRATCH_REPORT
**************************************************************************/
/*
* si470x_get_scratch_versions - gets the scratch page and version infos
*/
static int si470x_get_scratch_page_versions(struct si470x_device *radio)
{
int retval;
radio->usb_buf[0] = SCRATCH_REPORT;
retval = si470x_get_report(radio, radio->usb_buf, SCRATCH_REPORT_SIZE);
if (retval < 0)
dev_warn(&radio->intf->dev, "si470x_get_scratch: "
"si470x_get_report returned %d\n", retval);
else {
radio->software_version = radio->usb_buf[1];
radio->hardware_version = radio->usb_buf[2];
}
return (retval < 0) ? -EINVAL : 0;
}
/**************************************************************************
* RDS Driver Functions
**************************************************************************/
/*
* si470x_int_in_callback - rds callback and processing function
*
* TODO: do we need to use mutex locks in some sections?
*/
static void si470x_int_in_callback(struct urb *urb)
{
struct si470x_device *radio = urb->context;
int retval;
unsigned char regnr;
unsigned char blocknum;
unsigned short bler; /* rds block errors */
unsigned short rds;
unsigned char tmpbuf[3];
if (urb->status) {
if (urb->status == -ENOENT ||
urb->status == -ECONNRESET ||
urb->status == -ESHUTDOWN) {
return;
} else {
dev_warn(&radio->intf->dev,
"non-zero urb status (%d)\n", urb->status);
goto resubmit; /* Maybe we can recover. */
}
}
/* Sometimes the device returns len 0 packets */
if (urb->actual_length != RDS_REPORT_SIZE)
goto resubmit;
radio->registers[STATUSRSSI] =
get_unaligned_be16(&radio->int_in_buffer[1]);
if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
complete(&radio->completion);
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) {
/* Update RDS registers with URB data */
for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++)
radio->registers[STATUSRSSI + regnr] =
get_unaligned_be16(&radio->int_in_buffer[
regnr * RADIO_REGISTER_SIZE + 1]);
/* get rds blocks */
if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
/* No RDS group ready, better luck next time */
goto resubmit;
}
if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
/* RDS decoder not synchronized */
goto resubmit;
}
for (blocknum = 0; blocknum < 4; blocknum++) {
switch (blocknum) {
default:
bler = (radio->registers[STATUSRSSI] &
STATUSRSSI_BLERA) >> 9;
rds = radio->registers[RDSA];
break;
case 1:
bler = (radio->registers[READCHAN] &
READCHAN_BLERB) >> 14;
rds = radio->registers[RDSB];
break;
case 2:
bler = (radio->registers[READCHAN] &
READCHAN_BLERC) >> 12;
rds = radio->registers[RDSC];
break;
case 3:
bler = (radio->registers[READCHAN] &
READCHAN_BLERD) >> 10;
rds = radio->registers[RDSD];
break;
}
/* Fill the V4L2 RDS buffer */
put_unaligned_le16(rds, &tmpbuf);
tmpbuf[2] = blocknum; /* offset name */
tmpbuf[2] |= blocknum << 3; /* received offset */
if (bler > max_rds_errors)
tmpbuf[2] |= 0x80; /* uncorrectable errors */
else if (bler > 0)
tmpbuf[2] |= 0x40; /* corrected error(s) */
/* copy RDS block to internal buffer */
memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
radio->wr_index += 3;
/* wrap write pointer */
if (radio->wr_index >= radio->buf_size)
radio->wr_index = 0;
/* check for overflow */
if (radio->wr_index == radio->rd_index) {
/* increment and wrap read pointer */
radio->rd_index += 3;
if (radio->rd_index >= radio->buf_size)
radio->rd_index = 0;
}
}
if (radio->wr_index != radio->rd_index)
wake_up_interruptible(&radio->read_queue);
}
resubmit:
/* Resubmit if we're still running. */
if (radio->int_in_running && radio->usbdev) {
retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC);
if (retval) {
dev_warn(&radio->intf->dev,
"resubmitting urb failed (%d)", retval);
radio->int_in_running = 0;
}
}
radio->status_rssi_auto_update = radio->int_in_running;
}
int si470x_fops_open(struct file *file)
{
return v4l2_fh_open(file);
}
int si470x_fops_release(struct file *file)
{
return v4l2_fh_release(file);
}
static void si470x_usb_release(struct v4l2_device *v4l2_dev)
{
struct si470x_device *radio =
container_of(v4l2_dev, struct si470x_device, v4l2_dev);
usb_free_urb(radio->int_in_urb);
v4l2_ctrl_handler_free(&radio->hdl);
v4l2_device_unregister(&radio->v4l2_dev);
kfree(radio->int_in_buffer);
kfree(radio->buffer);
kfree(radio->usb_buf);
kfree(radio);
}
/**************************************************************************
* Video4Linux Interface
**************************************************************************/
/*
* si470x_vidioc_querycap - query device capabilities
*/
int si470x_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *capability)
{
struct si470x_device *radio = video_drvdata(file);
strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
usb_make_path(radio->usbdev, capability->bus_info,
sizeof(capability->bus_info));
capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE |
V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int si470x_start_usb(struct si470x_device *radio)
{
int retval;
/* initialize interrupt urb */
usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
usb_rcvintpipe(radio->usbdev,
radio->int_in_endpoint->bEndpointAddress),
radio->int_in_buffer,
le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
si470x_int_in_callback,
radio,
radio->int_in_endpoint->bInterval);
radio->int_in_running = 1;
mb();
retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
if (retval) {
dev_info(&radio->intf->dev,
"submitting int urb failed (%d)\n", retval);
radio->int_in_running = 0;
}
radio->status_rssi_auto_update = radio->int_in_running;
/* start radio */
retval = si470x_start(radio);
if (retval < 0)
return retval;
v4l2_ctrl_handler_setup(&radio->hdl);
return retval;
}
/**************************************************************************
* USB Interface
**************************************************************************/
/*
* si470x_usb_driver_probe - probe for the device
*/
static int si470x_usb_driver_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct si470x_device *radio;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
int i, int_end_size, retval = 0;
unsigned char version_warning = 0;
/* private data allocation and initialization */
radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
if (!radio) {
retval = -ENOMEM;
goto err_initial;
}
radio->usb_buf = kmalloc(MAX_REPORT_SIZE, GFP_KERNEL);
if (radio->usb_buf == NULL) {
retval = -ENOMEM;
goto err_radio;
}
radio->usbdev = interface_to_usbdev(intf);
radio->intf = intf;
radio->band = 1; /* Default to 76 - 108 MHz */
mutex_init(&radio->lock);
init_completion(&radio->completion);
iface_desc = intf->cur_altsetting;
/* Set up interrupt endpoint information. */
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_int_in(endpoint))
radio->int_in_endpoint = endpoint;
}
if (!radio->int_in_endpoint) {
dev_info(&intf->dev, "could not find interrupt in endpoint\n");
retval = -EIO;
goto err_usbbuf;
}
int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize);
radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL);
if (!radio->int_in_buffer) {
dev_info(&intf->dev, "could not allocate int_in_buffer");
retval = -ENOMEM;
goto err_usbbuf;
}
radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!radio->int_in_urb) {
dev_info(&intf->dev, "could not allocate int_in_urb");
retval = -ENOMEM;
goto err_intbuffer;
}
radio->v4l2_dev.release = si470x_usb_release;
/*
* The si470x SiLabs reference design uses the same USB IDs as
* 'Thanko's Raremono' si4734 based receiver. So check here which we
* have: attempt to read the device ID from the si470x: the lower 12
* bits should be 0x0242 for the si470x.
*
* We use this check to determine which device we are dealing with.
*/
if (id->idVendor == 0x10c4 && id->idProduct == 0x818a) {
retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
HID_REQ_GET_REPORT,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
1, 2,
radio->usb_buf, 3, 500);
if (retval != 3 ||
(get_unaligned_be16(&radio->usb_buf[1]) & 0xfff) != 0x0242) {
dev_info(&intf->dev, "this is not a si470x device.\n");
retval = -ENODEV;
goto err_urb;
}
}
retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
if (retval < 0) {
dev_err(&intf->dev, "couldn't register v4l2_device\n");
goto err_urb;
}
v4l2_ctrl_handler_init(&radio->hdl, 2);
v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops,
V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15);
if (radio->hdl.error) {
retval = radio->hdl.error;
dev_err(&intf->dev, "couldn't register control\n");
goto err_dev;
}
radio->videodev = si470x_viddev_template;
radio->videodev.ctrl_handler = &radio->hdl;
radio->videodev.lock = &radio->lock;
radio->videodev.v4l2_dev = &radio->v4l2_dev;
radio->videodev.release = video_device_release_empty;
video_set_drvdata(&radio->videodev, radio);
/* get device and chip versions */
if (si470x_get_all_registers(radio) < 0) {
retval = -EIO;
goto err_ctrl;
}
dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
radio->registers[DEVICEID], radio->registers[CHIPID]);
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
dev_warn(&intf->dev,
"This driver is known to work with "
"firmware version %hu,\n", RADIO_FW_VERSION);
dev_warn(&intf->dev,
"but the device has firmware version %hu.\n",
radio->registers[CHIPID] & CHIPID_FIRMWARE);
version_warning = 1;
}
/* get software and hardware versions */
if (si470x_get_scratch_page_versions(radio) < 0) {
retval = -EIO;
goto err_ctrl;
}
dev_info(&intf->dev, "software version %d, hardware version %d\n",
radio->software_version, radio->hardware_version);
if (radio->hardware_version < RADIO_HW_VERSION) {
dev_warn(&intf->dev,
"This driver is known to work with "
"hardware version %hu,\n", RADIO_HW_VERSION);
dev_warn(&intf->dev,
"but the device has hardware version %hu.\n",
radio->hardware_version);
version_warning = 1;
}
/* give out version warning */
if (version_warning == 1) {
dev_warn(&intf->dev,
"If you have some trouble using this driver,\n");
dev_warn(&intf->dev,
"please report to V4L ML at "
"linux-media@vger.kernel.org\n");
}
/* set led to connect state */
si470x_set_led_state(radio, BLINK_GREEN_LED);
/* rds buffer allocation */
radio->buf_size = rds_buf * 3;
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
retval = -EIO;
goto err_ctrl;
}
/* rds buffer configuration */
radio->wr_index = 0;
radio->rd_index = 0;
init_waitqueue_head(&radio->read_queue);
usb_set_intfdata(intf, radio);
/* start radio */
retval = si470x_start_usb(radio);
if (retval < 0)
goto err_all;
/* set initial frequency */
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
/* register video device */
retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
radio_nr);
if (retval) {
dev_err(&intf->dev, "Could not register video device\n");
goto err_all;
}
return 0;
err_all:
kfree(radio->buffer);
err_ctrl:
v4l2_ctrl_handler_free(&radio->hdl);
err_dev:
v4l2_device_unregister(&radio->v4l2_dev);
err_urb:
usb_free_urb(radio->int_in_urb);
err_intbuffer:
kfree(radio->int_in_buffer);
err_usbbuf:
kfree(radio->usb_buf);
err_radio:
kfree(radio);
err_initial:
return retval;
}
/*
* si470x_usb_driver_suspend - suspend the device
*/
static int si470x_usb_driver_suspend(struct usb_interface *intf,
pm_message_t message)
{
struct si470x_device *radio = usb_get_intfdata(intf);
dev_info(&intf->dev, "suspending now...\n");
/* shutdown interrupt handler */
if (radio->int_in_running) {
radio->int_in_running = 0;
if (radio->int_in_urb)
usb_kill_urb(radio->int_in_urb);
}
/* cancel read processes */
wake_up_interruptible(&radio->read_queue);
/* stop radio */
si470x_stop(radio);
return 0;
}
/*
* si470x_usb_driver_resume - resume the device
*/
static int si470x_usb_driver_resume(struct usb_interface *intf)
{
struct si470x_device *radio = usb_get_intfdata(intf);
int ret;
dev_info(&intf->dev, "resuming now...\n");
/* start radio */
ret = si470x_start_usb(radio);
if (ret == 0)
v4l2_ctrl_handler_setup(&radio->hdl);
return ret;
}
/*
* si470x_usb_driver_disconnect - disconnect the device
*/
static void si470x_usb_driver_disconnect(struct usb_interface *intf)
{
struct si470x_device *radio = usb_get_intfdata(intf);
mutex_lock(&radio->lock);
v4l2_device_disconnect(&radio->v4l2_dev);
video_unregister_device(&radio->videodev);
usb_set_intfdata(intf, NULL);
mutex_unlock(&radio->lock);
v4l2_device_put(&radio->v4l2_dev);
}
/*
* si470x_usb_driver - usb driver interface
*
* A note on suspend/resume: this driver had only empty suspend/resume
* functions, and when I tried to test suspend/resume it always disconnected
* instead of resuming (using my ADS InstantFM stick). So I've decided to
* remove these callbacks until someone else with better hardware can
* implement and test this.
*/
static struct usb_driver si470x_usb_driver = {
.name = DRIVER_NAME,
.probe = si470x_usb_driver_probe,
.disconnect = si470x_usb_driver_disconnect,
.suspend = si470x_usb_driver_suspend,
.resume = si470x_usb_driver_resume,
.reset_resume = si470x_usb_driver_resume,
.id_table = si470x_usb_driver_id_table,
};
module_usb_driver(si470x_usb_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);

227
drivers/media/radio/si470x/radio-si470x.h Normal file
View file

@ -0,0 +1,227 @@
/*
* drivers/media/radio/si470x/radio-si470x.h
*
* Driver for radios with Silicon Labs Si470x FM Radio Receivers
*
* Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* driver definitions */
#define DRIVER_NAME "radio-si470x"
/* kernel includes */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/videodev2.h>
#include <linux/mutex.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/v4l2-device.h>
#include <asm/unaligned.h>
/**************************************************************************
* Register Definitions
**************************************************************************/
#define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
#define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
#define DEVICEID 0 /* Device ID */
#define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
#define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
#define CHIPID 1 /* Chip ID */
#define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
#define CHIPID_DEV 0x0200 /* bits 09..09: Device */
#define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
#define POWERCFG 2 /* Power Configuration */
#define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
#define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
#define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
#define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
#define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
#define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
#define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
#define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
#define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
#define CHANNEL 3 /* Channel */
#define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
#define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
#define SYSCONFIG1 4 /* System Configuration 1 */
#define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
#define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
#define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
#define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
#define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
#define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
#define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
#define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
#define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
#define SYSCONFIG2 5 /* System Configuration 2 */
#define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
#define SYSCONFIG2_BAND 0x00c0 /* bits 07..06: Band Select */
#define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
#define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
#define SYSCONFIG3 6 /* System Configuration 3 */
#define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
#define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
#define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
#define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
#define TEST1 7 /* Test 1 */
#define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
#define TEST2 8 /* Test 2 */
/* TEST2 only contains reserved bits */
#define BOOTCONFIG 9 /* Boot Configuration */
/* BOOTCONFIG only contains reserved bits */
#define STATUSRSSI 10 /* Status RSSI */
#define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
#define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
#define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
#define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
#define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
#define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
#define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
#define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
#define READCHAN 11 /* Read Channel */
#define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
#define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
#define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
#define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
#define RDSA 12 /* RDSA */
#define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
#define RDSB 13 /* RDSB */
#define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
#define RDSC 14 /* RDSC */
#define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
#define RDSD 15 /* RDSD */
#define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
/**************************************************************************
* General Driver Definitions
**************************************************************************/
/*
* si470x_device - private data
*/
struct si470x_device {
struct v4l2_device v4l2_dev;
struct video_device videodev;
struct v4l2_ctrl_handler hdl;
int band;
/* Silabs internal registers (0..15) */
unsigned short registers[RADIO_REGISTER_NUM];
/* RDS receive buffer */
wait_queue_head_t read_queue;
struct mutex lock; /* buffer locking */
unsigned char *buffer; /* size is always multiple of three */
unsigned int buf_size;
unsigned int rd_index;
unsigned int wr_index;
struct completion completion;
bool status_rssi_auto_update; /* Does RSSI get updated automatic? */
#if IS_ENABLED(CONFIG_USB_SI470X)
/* reference to USB and video device */
struct usb_device *usbdev;
struct usb_interface *intf;
char *usb_buf;
/* Interrupt endpoint handling */
char *int_in_buffer;
struct usb_endpoint_descriptor *int_in_endpoint;
struct urb *int_in_urb;
int int_in_running;
/* scratch page */
unsigned char software_version;
unsigned char hardware_version;
#endif
#if IS_ENABLED(CONFIG_I2C_SI470X)
struct i2c_client *client;
#endif
};
/**************************************************************************
* Firmware Versions
**************************************************************************/
#define RADIO_FW_VERSION 12
/**************************************************************************
* Frequency Multiplicator
**************************************************************************/
/*
* The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW,
* 62.5 kHz otherwise.
* The tuner is able to have a channel spacing of 50, 100 or 200 kHz.
* tuner->capability is therefore set to V4L2_TUNER_CAP_LOW
* The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000
*/
#define FREQ_MUL (1000000 / 62.5)
/**************************************************************************
* Common Functions
**************************************************************************/
extern struct video_device si470x_viddev_template;
extern const struct v4l2_ctrl_ops si470x_ctrl_ops;
int si470x_get_register(struct si470x_device *radio, int regnr);
int si470x_set_register(struct si470x_device *radio, int regnr);
int si470x_disconnect_check(struct si470x_device *radio);
int si470x_set_freq(struct si470x_device *radio, unsigned int freq);
int si470x_start(struct si470x_device *radio);
int si470x_stop(struct si470x_device *radio);
int si470x_fops_open(struct file *file);
int si470x_fops_release(struct file *file);
int si470x_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *capability);