Skip to content

L
linux
Commit b09cd163 authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Mauro Carvalho Chehab
Browse files
Options

V4L/DVB (12413): radio-si470x: separate common and usb code 

This patch is a preceding work to add the i2c interface of si470x.
The si470x directory includes a common file and usb specific file and
header file.
The part unrelated with usb interface and i2c interface exists in
radio-si470x-common.c file, and The usb specific part exists in
radio-si470x-usb.c file.
Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
[tobias.lorenz@gmx.net: Small changes, due to new include "linux/smp_lock.h"]
Signed-off-by: default avatarTobias Lorenz <tobias.lorenz@gmx.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4efa2d75
Show whitespace changes
Inline Side-by-side
Showing with 1989 additions and 23 deletions
drivers/media/radio/Kconfig
View file @ b09cd163
......@@ -351,29 +351,11 @@ config USB_DSBR
To compile this driver as a module, choose M here: the
module will be called dsbr100.
config USB_SI470X
tristate "Silicon Labs Si470x FM Radio Receiver support"
depends on USB && VIDEO_V4L2
---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)
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.
config RADIO_SI470X
bool "Silicon Labs Si470x FM Radio Receiver support"
depends on VIDEO_V4L2
To compile this driver as a module, choose M here: the
module will be called radio-si470x.
source "drivers/media/radio/si470x/Kconfig"
config USB_MR800
tristate "AverMedia MR 800 USB FM radio support"
......
drivers/media/radio/Makefile
View file @ b09cd163
......@@ -17,7 +17,7 @@ obj-$(CONFIG_RADIO_GEMTEK_PCI) += radio-gemtek-pci.o
obj-$(CONFIG_RADIO_TRUST) += radio-trust.o
obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o
obj-$(CONFIG_USB_DSBR) += dsbr100.o
obj-$(CONFIG_USB_SI470X) += radio-si470x.o
obj-$(CONFIG_RADIO_SI470X) += si470x/
obj-$(CONFIG_USB_MR800) += radio-mr800.o
obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
......
drivers/media/radio/si470x/Kconfig 0 → 100644
View file @ b09cd163
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.
drivers/media/radio/si470x/Makefile 0 → 100644
View file @ b09cd163
#
# Makefile for radios with Silicon Labs Si470x FM Radio Receivers
#
radio-usb-si470x-objs := radio-si470x-usb.o radio-si470x-common.o
obj-$(CONFIG_USB_SI470X) += radio-usb-si470x.o
drivers/media/radio/si470x/radio-si470x-common.c 0 → 100644
View file @ b09cd163
/*
* 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>
*
* 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*");
/* Bottom of Band (MHz) */
/* 0: 87.5 - 108 MHz (USA, Europe)*/
/* 1: 76 - 108 MHz (Japan wide band) */
/* 2: 76 - 90 MHz (Japan) */
static unsigned short band = 1;
module_param(band, ushort, 0444);
MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
/* 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*");
/**************************************************************************
* Generic Functions
**************************************************************************/
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
unsigned long timeout;
bool timed_out = 0;
/* 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 */
timeout = jiffies + msecs_to_jiffies(tune_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
if (timed_out)
printk(KERN_WARNING DRIVER_NAME
": tune timed out after %u ms\n", tune_timeout);
stop:
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
retval = si470x_set_register(radio, CHANNEL);
done:
return retval;
}
/*
* si470x_get_freq - get the frequency
*/
static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
{
unsigned int spacing, band_bottom;
unsigned short chan;
int retval;
/* Spacing (kHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
/* 0: 200 kHz (USA, Australia) */
case 0:
spacing = 0.200 * FREQ_MUL; break;
/* 1: 100 kHz (Europe, Japan) */
case 1:
spacing = 0.100 * FREQ_MUL; break;
/* 2: 50 kHz */
default:
spacing = 0.050 * FREQ_MUL; break;
};
/* Bottom of Band (MHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
/* 0: 87.5 - 108 MHz (USA, Europe) */
case 0:
band_bottom = 87.5 * FREQ_MUL; break;
/* 1: 76 - 108 MHz (Japan wide band) */
default:
band_bottom = 76 * FREQ_MUL; break;
/* 2: 76 - 90 MHz (Japan) */
case 2:
band_bottom = 76 * FREQ_MUL; break;
};
/* 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 * spacing + band_bottom;
return retval;
}
/*
* si470x_set_freq - set the frequency
*/
int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
{
unsigned int spacing, band_bottom;
unsigned short chan;
/* Spacing (kHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
/* 0: 200 kHz (USA, Australia) */
case 0:
spacing = 0.200 * FREQ_MUL; break;
/* 1: 100 kHz (Europe, Japan) */
case 1:
spacing = 0.100 * FREQ_MUL; break;
/* 2: 50 kHz */
default:
spacing = 0.050 * FREQ_MUL; break;
};
/* Bottom of Band (MHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
/* 0: 87.5 - 108 MHz (USA, Europe) */
case 0:
band_bottom = 87.5 * FREQ_MUL; break;
/* 1: 76 - 108 MHz (Japan wide band) */
default:
band_bottom = 76 * FREQ_MUL; break;
/* 2: 76 - 90 MHz (Japan) */
case 2:
band_bottom = 76 * FREQ_MUL; break;
};
/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
chan = (freq - band_bottom) / spacing;
return si470x_set_chan(radio, chan);
}
/*
* si470x_set_seek - set seek
*/
static int si470x_set_seek(struct si470x_device *radio,
unsigned int wrap_around, unsigned int seek_upward)
{
int retval = 0;
unsigned long timeout;
bool timed_out = 0;
/* start seeking */
radio->registers[POWERCFG] |= POWERCFG_SEEK;
if (wrap_around == 1)
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
else
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
if (seek_upward == 1)
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
else
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
goto done;
/* wait till seek operation has completed */
timeout = jiffies + msecs_to_jiffies(seek_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
printk(KERN_WARNING DRIVER_NAME
": seek failed / band limit reached\n");
if (timed_out)
printk(KERN_WARNING DRIVER_NAME
": seek timed out after %u ms\n", seek_timeout);
stop:
/* stop seeking */
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
retval = si470x_set_register(radio, POWERCFG);
done:
/* try again, if timed out */
if ((retval == 0) && timed_out)
retval = -EAGAIN;
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] = SYSCONFIG1_DE;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
goto done;
/* sysconfig 2 */
radio->registers[SYSCONFIG2] =
(0x3f << 8) | /* SEEKTH */
((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
*/
int si470x_rds_on(struct si470x_device *radio)
{
int retval;
/* sysconfig 1 */
mutex_lock(&radio->lock);
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
mutex_unlock(&radio->lock);
return retval;
}
/**************************************************************************
* Video4Linux Interface
**************************************************************************/
/*
* si470x_vidioc_queryctrl - enumerate control items
*/
static int si470x_vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int retval = -EINVAL;
/* abort if qc->id is below V4L2_CID_BASE */
if (qc->id < V4L2_CID_BASE)
goto done;
/* search video control */
switch (qc->id) {
case V4L2_CID_AUDIO_VOLUME:
return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
case V4L2_CID_AUDIO_MUTE:
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
}
/* disable unsupported base controls */
/* to satisfy kradio and such apps */
if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
qc->flags = V4L2_CTRL_FLAG_DISABLED;
retval = 0;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": query controls failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_g_ctrl - get the value of a control
*/
static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = radio->registers[SYSCONFIG2] &
SYSCONFIG2_VOLUME;
break;
case V4L2_CID_AUDIO_MUTE:
ctrl->value = ((radio->registers[POWERCFG] &
POWERCFG_DMUTE) == 0) ? 1 : 0;
break;
default:
retval = -EINVAL;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": get control failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_ctrl - set the value of a control
*/
static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->value;
retval = si470x_set_register(radio, SYSCONFIG2);
break;
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value == 1)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
retval = si470x_set_register(radio, POWERCFG);
break;
default:
retval = -EINVAL;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set control failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_g_audio - get audio attributes
*/
static int si470x_vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *audio)
{
/* driver constants */
audio->index = 0;
strcpy(audio->name, "Radio");
audio->capability = V4L2_AUDCAP_STEREO;
audio->mode = 0;
return 0;
}
/*
* 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;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (tuner->index != 0) {
retval = -EINVAL;
goto done;
}
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto done;
/* 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;
/* range limits */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
/* 0: 87.5 - 108 MHz (USA, Europe, default) */
default:
tuner->rangelow = 87.5 * FREQ_MUL;
tuner->rangehigh = 108 * FREQ_MUL;
break;
/* 1: 76 - 108 MHz (Japan wide band) */
case 1:
tuner->rangelow = 76 * FREQ_MUL;
tuner->rangehigh = 108 * FREQ_MUL;
break;
/* 2: 76 - 90 MHz (Japan) */
case 2:
tuner->rangelow = 76 * FREQ_MUL;
tuner->rangehigh = 90 * FREQ_MUL;
break;
};
/* 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_MONO | 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 db쨉V in 1 db increments (max at ~75 db쨉V) */
tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
/* the ideal factor is 0xffff/75 = 873,8 */
tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
/* 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;
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": get tuner failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
int retval = -EINVAL;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (tuner->index != 0)
goto done;
/* mono/stereo selector */
switch (tuner->audmode) {
case V4L2_TUNER_MODE_MONO:
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
break;
case V4L2_TUNER_MODE_STEREO:
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
break;
default:
goto done;
}
retval = si470x_set_register(radio, POWERCFG);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set tuner failed with %d\n", retval);
return retval;
}
/*
* 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);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (freq->tuner != 0) {
retval = -EINVAL;
goto done;
}
freq->type = V4L2_TUNER_RADIO;
retval = si470x_get_freq(radio, &freq->frequency);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": get frequency failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_frequency - set tuner or modulator radio frequency
*/
static int si470x_vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *freq)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (freq->tuner != 0) {
retval = -EINVAL;
goto done;
}
retval = si470x_set_freq(radio, freq->frequency);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set frequency failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
*/
static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
struct v4l2_hw_freq_seek *seek)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (seek->tuner != 0) {
retval = -EINVAL;
goto done;
}
retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set hardware frequency seek failed with %d\n",
retval);
return retval;
}
/*
* si470x_ioctl_ops - video device ioctl operations
*/
static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
.vidioc_querycap = si470x_vidioc_querycap,
.vidioc_queryctrl = si470x_vidioc_queryctrl,
.vidioc_g_ctrl = si470x_vidioc_g_ctrl,
.vidioc_s_ctrl = si470x_vidioc_s_ctrl,
.vidioc_g_audio = si470x_vidioc_g_audio,
.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,
};
/*
* si470x_viddev_template - video device interface
*/
struct video_device si470x_viddev_template = {
.fops = &si470x_fops,
.name = DRIVER_NAME,
.release = video_device_release,
.ioctl_ops = &si470x_ioctl_ops,
};
drivers/media/radio/radio-si470x.c → drivers/media/radio/si470x/radio-si470x-usb.c
View file @ b09cd163
/*
* drivers/media/radio/radio-si470x.c
* drivers/media/radio/si470x/radio-si470x-usb.c
*
* Driver for USB radios for the Silicon Labs Si470x FM Radio Receivers:
* - Silicon Labs USB FM Radio Reference Design
* - ADS/Tech FM Radio Receiver (formerly Instant FM Music) (RDX-155-EF)
* - KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
* - Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear)
* USB driver for radios with Silicon Labs Si470x FM Radio Receivers
*
* Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
*
......@@ -26,92 +22,6 @@
/*
* 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
*
* ToDo:
* - add firmware download/update support
*/
......@@ -119,29 +29,16 @@
/* driver definitions */
#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
#define DRIVER_NAME "radio-si470x"
#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 10)
#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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <linux/mutex.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/rds.h>
#include <asm/unaligned.h>
#include "radio-si470x.h"
/* USB Device ID List */
......@@ -170,44 +67,11 @@ static int radio_nr = -1;
module_param(radio_nr, int, 0444);
MODULE_PARM_DESC(radio_nr, "Radio Nr");
/* 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*");
/* Bottom of Band (MHz) */
/* 0: 87.5 - 108 MHz (USA, Europe)*/
/* 1: 76 - 108 MHz (Japan wide band) */
/* 2: 76 - 90 MHz (Japan) */
static unsigned short band = 1;
module_param(band, ushort, 0444);
MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
/* 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*");
/* USB timeout */
static unsigned int usb_timeout = 500;
module_param(usb_timeout, uint, 0644);
MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
/* 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*");
/* RDS buffer blocks */
static unsigned int rds_buf = 100;
module_param(rds_buf, uint, 0444);
......@@ -223,98 +87,6 @@ module_param(max_rds_errors, ushort, 0644);
MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
/**************************************************************************
* 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 0x0080 /* 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) */
/**************************************************************************
* USB HID Reports
......@@ -431,58 +203,6 @@ MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
/**************************************************************************
* General Driver Definitions
**************************************************************************/
/*
* si470x_device - private data
*/
struct si470x_device {
/* reference to USB and video device */
struct usb_device *usbdev;
struct usb_interface *intf;
struct video_device *videodev;
/* Interrupt endpoint handling */
char *int_in_buffer;
struct usb_endpoint_descriptor *int_in_endpoint;
struct urb *int_in_urb;
int int_in_running;
/* driver management */
unsigned int users;
unsigned char disconnected;
struct mutex disconnect_lock;
/* 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;
/* scratch page */
unsigned char software_version;
unsigned char hardware_version;
};
/*
* 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)
/**************************************************************************
* General Driver Functions - REGISTER_REPORTs
**************************************************************************/
......@@ -536,7 +256,7 @@ static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
/*
* si470x_get_register - read register
*/
static int si470x_get_register(struct si470x_device *radio, int regnr)
int si470x_get_register(struct si470x_device *radio, int regnr)
{
unsigned char buf[REGISTER_REPORT_SIZE];
int retval;
......@@ -555,7 +275,7 @@ static int si470x_get_register(struct si470x_device *radio, int regnr)
/*
* si470x_set_register - write register
*/
static int si470x_set_register(struct si470x_device *radio, int regnr)
int si470x_set_register(struct si470x_device *radio, int regnr)
{
unsigned char buf[REGISTER_REPORT_SIZE];
int retval;
......@@ -569,272 +289,6 @@ static int si470x_set_register(struct si470x_device *radio, int regnr)
}
/*
* si470x_set_chan - set the channel
*/
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
int retval;
unsigned long timeout;
bool timed_out = 0;
/* 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 */
timeout = jiffies + msecs_to_jiffies(tune_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
if (timed_out)
printk(KERN_WARNING DRIVER_NAME
": tune timed out after %u ms\n", tune_timeout);
stop:
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
retval = si470x_set_register(radio, CHANNEL);
done:
return retval;
}
/*
* si470x_get_freq - get the frequency
*/
static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
{
unsigned int spacing, band_bottom;
unsigned short chan;
int retval;
/* Spacing (kHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
/* 0: 200 kHz (USA, Australia) */
case 0:
spacing = 0.200 * FREQ_MUL; break;
/* 1: 100 kHz (Europe, Japan) */
case 1:
spacing = 0.100 * FREQ_MUL; break;
/* 2: 50 kHz */
default:
spacing = 0.050 * FREQ_MUL; break;
};
/* Bottom of Band (MHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
/* 0: 87.5 - 108 MHz (USA, Europe) */
case 0:
band_bottom = 87.5 * FREQ_MUL; break;
/* 1: 76 - 108 MHz (Japan wide band) */
default:
band_bottom = 76 * FREQ_MUL; break;
/* 2: 76 - 90 MHz (Japan) */
case 2:
band_bottom = 76 * FREQ_MUL; break;
};
/* 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 * spacing + band_bottom;
return retval;
}
/*
* si470x_set_freq - set the frequency
*/
static int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
{
unsigned int spacing, band_bottom;
unsigned short chan;
/* Spacing (kHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
/* 0: 200 kHz (USA, Australia) */
case 0:
spacing = 0.200 * FREQ_MUL; break;
/* 1: 100 kHz (Europe, Japan) */
case 1:
spacing = 0.100 * FREQ_MUL; break;
/* 2: 50 kHz */
default:
spacing = 0.050 * FREQ_MUL; break;
};
/* Bottom of Band (MHz) */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
/* 0: 87.5 - 108 MHz (USA, Europe) */
case 0:
band_bottom = 87.5 * FREQ_MUL; break;
/* 1: 76 - 108 MHz (Japan wide band) */
default:
band_bottom = 76 * FREQ_MUL; break;
/* 2: 76 - 90 MHz (Japan) */
case 2:
band_bottom = 76 * FREQ_MUL; break;
};
/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
chan = (freq - band_bottom) / spacing;
return si470x_set_chan(radio, chan);
}
/*
* si470x_set_seek - set seek
*/
static int si470x_set_seek(struct si470x_device *radio,
unsigned int wrap_around, unsigned int seek_upward)
{
int retval = 0;
unsigned long timeout;
bool timed_out = 0;
/* start seeking */
radio->registers[POWERCFG] |= POWERCFG_SEEK;
if (wrap_around == 1)
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
else
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
if (seek_upward == 1)
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
else
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
retval = si470x_set_register(radio, POWERCFG);
if (retval < 0)
goto done;
/* wait till seek operation has completed */
timeout = jiffies + msecs_to_jiffies(seek_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto stop;
timed_out = time_after(jiffies, timeout);
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
(!timed_out));
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
printk(KERN_WARNING DRIVER_NAME
": seek failed / band limit reached\n");
if (timed_out)
printk(KERN_WARNING DRIVER_NAME
": seek timed out after %u ms\n", seek_timeout);
stop:
/* stop seeking */
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
retval = si470x_set_register(radio, POWERCFG);
done:
/* try again, if timed out */
if ((retval == 0) && timed_out)
retval = -EAGAIN;
return retval;
}
/*
* si470x_start - switch on radio
*/
static 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] = SYSCONFIG1_DE;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
goto done;
/* sysconfig 2 */
radio->registers[SYSCONFIG2] =
(0x3f << 8) | /* SEEKTH */
((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
*/
static 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 */
mutex_lock(&radio->lock);
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
retval = si470x_set_register(radio, SYSCONFIG1);
if (retval < 0)
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
mutex_unlock(&radio->lock);
return retval;
}
/**************************************************************************
* General Driver Functions - ENTIRE_REPORT
......@@ -1052,9 +506,8 @@ static ssize_t si470x_fops_read(struct file *file, char __user *buf,
unsigned int block_count = 0;
/* switch on rds reception */
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) {
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
si470x_rds_on(radio);
}
/* block if no new data available */
while (radio->wr_index == radio->rd_index) {
......@@ -1110,9 +563,8 @@ static unsigned int si470x_fops_poll(struct file *file,
int retval = 0;
/* switch on rds reception */
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) {
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
si470x_rds_on(radio);
}
poll_wait(file, &radio->read_queue, pts);
......@@ -1226,7 +678,7 @@ static int si470x_fops_release(struct file *file)
/*
* si470x_fops - file operations interface
*/
static const struct v4l2_file_operations si470x_fops = {
const struct v4l2_file_operations si470x_fops = {
.owner = THIS_MODULE,
.read = si470x_fops_read,
.poll = si470x_fops_poll,
......@@ -1244,14 +696,15 @@ static const struct v4l2_file_operations si470x_fops = {
/*
* si470x_vidioc_querycap - query device capabilities
*/
static int si470x_vidioc_querycap(struct file *file, void *priv,
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));
usb_make_path(radio->usbdev, capability->bus_info,
sizeof(capability->bus_info));
capability->version = DRIVER_KERNEL_VERSION;
capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
......@@ -1260,371 +713,6 @@ static int si470x_vidioc_querycap(struct file *file, void *priv,
}
/*
* si470x_vidioc_queryctrl - enumerate control items
*/
static int si470x_vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int retval = -EINVAL;
/* abort if qc->id is below V4L2_CID_BASE */
if (qc->id < V4L2_CID_BASE)
goto done;
/* search video control */
switch (qc->id) {
case V4L2_CID_AUDIO_VOLUME:
return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
case V4L2_CID_AUDIO_MUTE:
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
}
/* disable unsupported base controls */
/* to satisfy kradio and such apps */
if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
qc->flags = V4L2_CTRL_FLAG_DISABLED;
retval = 0;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": query controls failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_g_ctrl - get the value of a control
*/
static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = radio->registers[SYSCONFIG2] &
SYSCONFIG2_VOLUME;
break;
case V4L2_CID_AUDIO_MUTE:
ctrl->value = ((radio->registers[POWERCFG] &
POWERCFG_DMUTE) == 0) ? 1 : 0;
break;
default:
retval = -EINVAL;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": get control failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_ctrl - set the value of a control
*/
static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->value;
retval = si470x_set_register(radio, SYSCONFIG2);
break;
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value == 1)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
retval = si470x_set_register(radio, POWERCFG);
break;
default:
retval = -EINVAL;
}
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set control failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_g_audio - get audio attributes
*/
static int si470x_vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *audio)
{
/* driver constants */
audio->index = 0;
strcpy(audio->name, "Radio");
audio->capability = V4L2_AUDCAP_STEREO;
audio->mode = 0;
return 0;
}
/*
* 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;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (tuner->index != 0) {
retval = -EINVAL;
goto done;
}
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
goto done;
/* 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;
/* range limits */
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
/* 0: 87.5 - 108 MHz (USA, Europe, default) */
default:
tuner->rangelow = 87.5 * FREQ_MUL;
tuner->rangehigh = 108 * FREQ_MUL;
break;
/* 1: 76 - 108 MHz (Japan wide band) */
case 1 :
tuner->rangelow = 76 * FREQ_MUL;
tuner->rangehigh = 108 * FREQ_MUL;
break;
/* 2: 76 - 90 MHz (Japan) */
case 2 :
tuner->rangelow = 76 * FREQ_MUL;
tuner->rangehigh = 90 * FREQ_MUL;
break;
};
/* 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_MONO | 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);
/* 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;
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": get tuner failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_tuner - set tuner attributes
*/
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_drvdata(file);
int retval = -EINVAL;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (tuner->index != 0)
goto done;
/* mono/stereo selector */
switch (tuner->audmode) {
case V4L2_TUNER_MODE_MONO:
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
break;
case V4L2_TUNER_MODE_STEREO:
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
break;
default:
goto done;
}
retval = si470x_set_register(radio, POWERCFG);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set tuner failed with %d\n", retval);
return retval;
}
/*
* 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);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (freq->tuner != 0) {
retval = -EINVAL;
goto done;
}
freq->type = V4L2_TUNER_RADIO;
retval = si470x_get_freq(radio, &freq->frequency);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": get frequency failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_frequency - set tuner or modulator radio frequency
*/
static int si470x_vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *freq)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (freq->tuner != 0) {
retval = -EINVAL;
goto done;
}
retval = si470x_set_freq(radio, freq->frequency);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set frequency failed with %d\n", retval);
return retval;
}
/*
* si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
*/
static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
struct v4l2_hw_freq_seek *seek)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
/* safety checks */
if (radio->disconnected) {
retval = -EIO;
goto done;
}
if (seek->tuner != 0) {
retval = -EINVAL;
goto done;
}
retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
done:
if (retval < 0)
printk(KERN_WARNING DRIVER_NAME
": set hardware frequency seek failed with %d\n",
retval);
return retval;
}
/*
* si470x_ioctl_ops - video device ioctl operations
*/
static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
.vidioc_querycap = si470x_vidioc_querycap,
.vidioc_queryctrl = si470x_vidioc_queryctrl,
.vidioc_g_ctrl = si470x_vidioc_g_ctrl,
.vidioc_s_ctrl = si470x_vidioc_s_ctrl,
.vidioc_g_audio = si470x_vidioc_g_audio,
.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,
};
/*
* si470x_viddev_template - video device interface
*/
static struct video_device si470x_viddev_template = {
.fops = &si470x_fops,
.name = DRIVER_NAME,
.release = video_device_release,
.ioctl_ops = &si470x_ioctl_ops,
};
/**************************************************************************
* USB Interface
......@@ -1751,7 +839,8 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
init_waitqueue_head(&radio->read_queue);
/* register video device */
retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
retval = video_register_device(radio->videodev, VFL_TYPE_RADIO,
radio_nr);
if (retval) {
printk(KERN_WARNING DRIVER_NAME
": Could not register video device\n");
......
drivers/media/radio/si470x/radio-si470x.h 0 → 100644
View file @ b09cd163
/*
* 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/slab.h>
#include <linux/smp_lock.h>
#include <linux/input.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <linux/mutex.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/rds.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 0x0080 /* 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 video_device *videodev;
/* reference to USB and video device */
struct usb_device *usbdev;
struct usb_interface *intf;
/* 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;
/* driver management */
unsigned char disconnected;
struct mutex disconnect_lock;
unsigned int users;
/* 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;
};
/*
* 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 const struct v4l2_file_operations si470x_fops;
extern struct video_device si470x_viddev_template;
int si470x_get_register(struct si470x_device *radio, int regnr);
int si470x_set_register(struct si470x_device *radio, int regnr);
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_rds_on(struct si470x_device *radio);
int si470x_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *capability);
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7