/*
* drivers/media/radio/radio-si470x.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)
*
* Copyright (c) 2007 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
*
* ToDo:
* - check USB Vendor/Product ID for ADS/Tech FM Radio Receiver
* (formerly Instant FM Music) (RDX-155-EF) is 06e1:a155
* - add seeking support
* - add firmware download/update support
* - add possibility to switch off RDS
* - RDS support: interrupt mode, instead of polling
* - add LED status output
*/
/* driver definitions */
#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
#define DRIVER_NAME "radio-si470x"
#define DRIVER_VERSION KERNEL_VERSION(1, 0, 2)
#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
/* kernel includes */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/rds.h>
/* Radio Nr */
static int radio_nr = -1;
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(radio_nr, "Radio Nr");
/* Spacing (kHz) */
/* 0: 200 kHz (USA, Australia) */
/* 1: 100 kHz (Europe, Japan) */
/* 2: 50 kHz */
static int space = 2;
module_param(
