/*
* 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) 2008 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
* - improved error logging
*
