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: Joonyoung Shim <jy0922.shim@samsung.com> [tobias.lorenz@gmx.net: Small changes, due to new include "linux/smp_lock.h"] Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Joonyoung Shim
Mauro Carvalho Chehab
parent
4efa2d75d4
commit
b09cd16354
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@ -351,29 +351,11 @@ config USB_DSBR
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To compile this driver as a module, choose M here: the
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module will be called dsbr100.
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config USB_SI470X
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tristate "Silicon Labs Si470x FM Radio Receiver support"
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depends on USB && VIDEO_V4L2
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---help---
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This is a driver for USB devices with the Silicon Labs SI470x
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chip. Currently these devices are known to work:
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- 10c4:818a: Silicon Labs USB FM Radio Reference Design
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- 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music)
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- 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
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config RADIO_SI470X
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bool "Silicon Labs Si470x FM Radio Receiver support"
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depends on VIDEO_V4L2
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Sound is provided by the ALSA USB Audio/MIDI driver. Therefore
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if you don't want to use the device solely for RDS receiving,
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it is recommended to also select SND_USB_AUDIO.
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Please have a look at the documentation, especially on how
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to redirect the audio stream from the radio to your sound device:
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Documentation/video4linux/si470x.txt
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Say Y here if you want to connect this type of radio to your
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computer's USB port.
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To compile this driver as a module, choose M here: the
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module will be called radio-si470x.
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source "drivers/media/radio/si470x/Kconfig"
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config USB_MR800
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tristate "AverMedia MR 800 USB FM radio support"
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@ -17,7 +17,7 @@ obj-$(CONFIG_RADIO_GEMTEK_PCI) += radio-gemtek-pci.o
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obj-$(CONFIG_RADIO_TRUST) += radio-trust.o
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obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o
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obj-$(CONFIG_USB_DSBR) += dsbr100.o
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obj-$(CONFIG_USB_SI470X) += radio-si470x.o
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obj-$(CONFIG_RADIO_SI470X) += si470x/
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obj-$(CONFIG_USB_MR800) += radio-mr800.o
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obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,24 @@
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config USB_SI470X
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tristate "Silicon Labs Si470x FM Radio Receiver support with USB"
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depends on USB && RADIO_SI470X
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---help---
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This is a driver for USB devices with the Silicon Labs SI470x
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chip. Currently these devices are known to work:
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- 10c4:818a: Silicon Labs USB FM Radio Reference Design
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- 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music)
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- 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
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- 10c5:819a: Sanei Electric FM USB Radio (aka DealExtreme.com PCear)
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Sound is provided by the ALSA USB Audio/MIDI driver. Therefore
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if you don't want to use the device solely for RDS receiving,
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it is recommended to also select SND_USB_AUDIO.
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Please have a look at the documentation, especially on how
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to redirect the audio stream from the radio to your sound device:
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Documentation/video4linux/si470x.txt
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Say Y here if you want to connect this type of radio to your
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computer's USB port.
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To compile this driver as a module, choose M here: the
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module will be called radio-usb-si470x.
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@ -0,0 +1,7 @@
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#
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# Makefile for radios with Silicon Labs Si470x FM Radio Receivers
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#
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radio-usb-si470x-objs := radio-si470x-usb.o radio-si470x-common.o
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obj-$(CONFIG_USB_SI470X) += radio-usb-si470x.o
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@ -0,0 +1,794 @@
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/*
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* drivers/media/radio/si470x/radio-si470x-common.c
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*
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* Driver for radios with Silicon Labs Si470x FM Radio Receivers
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*
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* Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* History:
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* 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.0
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* - First working version
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* 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.1
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* - Improved error handling, every function now returns errno
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* - Improved multi user access (start/mute/stop)
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* - Channel doesn't get lost anymore after start/mute/stop
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* - RDS support added (polling mode via interrupt EP 1)
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* - marked default module parameters with *value*
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* - switched from bit structs to bit masks
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* - header file cleaned and integrated
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* 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.2
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* - hex values are now lower case
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* - commented USB ID for ADS/Tech moved on todo list
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* - blacklisted si470x in hid-quirks.c
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* - rds buffer handling functions integrated into *_work, *_read
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* - rds_command in si470x_poll exchanged against simple retval
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* - check for firmware version 15
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* - code order and prototypes still remain the same
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* - spacing and bottom of band codes remain the same
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* 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.3
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* - code reordered to avoid function prototypes
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* - switch/case defaults are now more user-friendly
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* - unified comment style
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* - applied all checkpatch.pl v1.12 suggestions
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* except the warning about the too long lines with bit comments
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* - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
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* 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.4
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* - avoid poss. locking when doing copy_to_user which may sleep
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* - RDS is automatically activated on read now
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* - code cleaned of unnecessary rds_commands
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* - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
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* (thanks to Guillaume RAMOUSSE)
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* 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.5
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* - number of seek_retries changed to tune_timeout
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* - fixed problem with incomplete tune operations by own buffers
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* - optimization of variables and printf types
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* - improved error logging
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* 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Oliver Neukum <oliver@neukum.org>
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* Version 1.0.6
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* - fixed coverity checker warnings in *_usb_driver_disconnect
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* - probe()/open() race by correct ordering in probe()
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* - DMA coherency rules by separate allocation of all buffers
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* - use of endianness macros
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* - abuse of spinlock, replaced by mutex
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* - racy handling of timer in disconnect,
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* replaced by delayed_work
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* - racy interruptible_sleep_on(),
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* replaced with wait_event_interruptible()
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* - handle signals in read()
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* 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Oliver Neukum <oliver@neukum.org>
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* Version 1.0.7
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* - usb autosuspend support
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* - unplugging fixed
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* 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.8
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* - hardware frequency seek support
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* - afc indication
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* - more safety checks, let si470x_get_freq return errno
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* - vidioc behavior corrected according to v4l2 spec
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* 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
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* - add support for KWorld USB FM Radio FM700
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* - blacklisted KWorld radio in hid-core.c and hid-ids.h
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* 2008-12-03 Mark Lord <mlord@pobox.com>
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* - add support for DealExtreme USB Radio
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* 2009-01-31 Bob Ross <pigiron@gmx.com>
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* - correction of stereo detection/setting
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* - correction of signal strength indicator scaling
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* 2009-01-31 Rick Bronson <rick@efn.org>
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* Tobias Lorenz <tobias.lorenz@gmx.net>
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* - add LED status output
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* - get HW/SW version from scratchpad
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* 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
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* Version 1.0.10
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* - add support for interrupt mode for RDS endpoint,
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* instead of polling.
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* Improves RDS reception significantly
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*/
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/* kernel includes */
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#include "radio-si470x.h"
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/**************************************************************************
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* Module Parameters
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**************************************************************************/
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/* Spacing (kHz) */
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/* 0: 200 kHz (USA, Australia) */
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/* 1: 100 kHz (Europe, Japan) */
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/* 2: 50 kHz */
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static unsigned short space = 2;
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module_param(space, ushort, 0444);
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MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
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/* Bottom of Band (MHz) */
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/* 0: 87.5 - 108 MHz (USA, Europe)*/
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/* 1: 76 - 108 MHz (Japan wide band) */
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/* 2: 76 - 90 MHz (Japan) */
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static unsigned short band = 1;
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module_param(band, ushort, 0444);
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MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
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/* De-emphasis */
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/* 0: 75 us (USA) */
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/* 1: 50 us (Europe, Australia, Japan) */
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static unsigned short de = 1;
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module_param(de, ushort, 0444);
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MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
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/* Tune timeout */
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static unsigned int tune_timeout = 3000;
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module_param(tune_timeout, uint, 0644);
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MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
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/* Seek timeout */
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static unsigned int seek_timeout = 5000;
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module_param(seek_timeout, uint, 0644);
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MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
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/**************************************************************************
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* Generic Functions
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**************************************************************************/
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/*
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* si470x_set_chan - set the channel
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*/
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static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
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{
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int retval;
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unsigned long timeout;
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bool timed_out = 0;
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/* start tuning */
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radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
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radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
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retval = si470x_set_register(radio, CHANNEL);
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if (retval < 0)
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goto done;
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/* wait till tune operation has completed */
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timeout = jiffies + msecs_to_jiffies(tune_timeout);
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do {
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retval = si470x_get_register(radio, STATUSRSSI);
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if (retval < 0)
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goto stop;
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timed_out = time_after(jiffies, timeout);
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} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
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(!timed_out));
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if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
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printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
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if (timed_out)
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printk(KERN_WARNING DRIVER_NAME
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": tune timed out after %u ms\n", tune_timeout);
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stop:
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/* stop tuning */
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radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
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retval = si470x_set_register(radio, CHANNEL);
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done:
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return retval;
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}
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/*
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* si470x_get_freq - get the frequency
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*/
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static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
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{
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unsigned int spacing, band_bottom;
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unsigned short chan;
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int retval;
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/* Spacing (kHz) */
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switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
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/* 0: 200 kHz (USA, Australia) */
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case 0:
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spacing = 0.200 * FREQ_MUL; break;
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/* 1: 100 kHz (Europe, Japan) */
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case 1:
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spacing = 0.100 * FREQ_MUL; break;
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/* 2: 50 kHz */
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default:
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spacing = 0.050 * FREQ_MUL; break;
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};
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/* Bottom of Band (MHz) */
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switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
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/* 0: 87.5 - 108 MHz (USA, Europe) */
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case 0:
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band_bottom = 87.5 * FREQ_MUL; break;
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/* 1: 76 - 108 MHz (Japan wide band) */
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default:
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band_bottom = 76 * FREQ_MUL; break;
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/* 2: 76 - 90 MHz (Japan) */
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case 2:
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band_bottom = 76 * FREQ_MUL; break;
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};
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/* read channel */
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retval = si470x_get_register(radio, READCHAN);
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chan = radio->registers[READCHAN] & READCHAN_READCHAN;
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/* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
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*freq = chan * spacing + band_bottom;
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return retval;
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}
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/*
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* si470x_set_freq - set the frequency
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*/
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int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
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{
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unsigned int spacing, band_bottom;
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unsigned short chan;
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/* Spacing (kHz) */
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switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
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/* 0: 200 kHz (USA, Australia) */
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case 0:
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spacing = 0.200 * FREQ_MUL; break;
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/* 1: 100 kHz (Europe, Japan) */
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case 1:
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spacing = 0.100 * FREQ_MUL; break;
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/* 2: 50 kHz */
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default:
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spacing = 0.050 * FREQ_MUL; break;
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};
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/* Bottom of Band (MHz) */
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switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
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/* 0: 87.5 - 108 MHz (USA, Europe) */
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case 0:
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band_bottom = 87.5 * FREQ_MUL; break;
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/* 1: 76 - 108 MHz (Japan wide band) */
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default:
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band_bottom = 76 * FREQ_MUL; break;
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/* 2: 76 - 90 MHz (Japan) */
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case 2:
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band_bottom = 76 * FREQ_MUL; break;
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};
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/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
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chan = (freq - band_bottom) / spacing;
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return si470x_set_chan(radio, chan);
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}
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/*
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* si470x_set_seek - set seek
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*/
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static int si470x_set_seek(struct si470x_device *radio,
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unsigned int wrap_around, unsigned int seek_upward)
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{
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int retval = 0;
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unsigned long timeout;
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bool timed_out = 0;
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/* start seeking */
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radio->registers[POWERCFG] |= POWERCFG_SEEK;
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if (wrap_around == 1)
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radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
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else
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radio->registers[POWERCFG] |= POWERCFG_SKMODE;
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if (seek_upward == 1)
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radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
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else
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radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
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retval = si470x_set_register(radio, POWERCFG);
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if (retval < 0)
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goto done;
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/* wait till seek operation has completed */
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timeout = jiffies + msecs_to_jiffies(seek_timeout);
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do {
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retval = si470x_get_register(radio, STATUSRSSI);
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if (retval < 0)
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goto stop;
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timed_out = time_after(jiffies, timeout);
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} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
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(!timed_out));
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if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
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printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
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if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
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printk(KERN_WARNING DRIVER_NAME
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": seek failed / band limit reached\n");
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if (timed_out)
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printk(KERN_WARNING DRIVER_NAME
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": seek timed out after %u ms\n", seek_timeout);
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stop:
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/* stop seeking */
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radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
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retval = si470x_set_register(radio, POWERCFG);
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done:
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/* try again, if timed out */
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if ((retval == 0) && timed_out)
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retval = -EAGAIN;
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return retval;
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}
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/*
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* si470x_start - switch on radio
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*/
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int si470x_start(struct si470x_device *radio)
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{
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int retval;
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/* 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,
|
||||
};
|
||||
|
|
@ -0,0 +1,958 @@
|
|||
/*
|
||||
* 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_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/usb.h>
|
||||
#include <linux/hid.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) },
|
||||
/* 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
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* Software/Hardware Versions
|
||||
**************************************************************************/
|
||||
#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
|
||||
#define RADIO_SW_VERSION 7
|
||||
#define RADIO_SW_VERSION_CURRENT 15
|
||||
#define RADIO_HW_VERSION 1
|
||||
|
||||
#define SCRATCH_PAGE_SW_VERSION 1
|
||||
#define SCRATCH_PAGE_HW_VERSION 2
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* 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 = (unsigned char *) 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)
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": 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 = (unsigned char *) 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)
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": 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)
|
||||
{
|
||||
unsigned char buf[REGISTER_REPORT_SIZE];
|
||||
int retval;
|
||||
|
||||
buf[0] = REGISTER_REPORT(regnr);
|
||||
|
||||
retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
|
||||
|
||||
if (retval >= 0)
|
||||
radio->registers[regnr] = get_unaligned_be16(&buf[1]);
|
||||
|
||||
return (retval < 0) ? -EINVAL : 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_set_register - write register
|
||||
*/
|
||||
int si470x_set_register(struct si470x_device *radio, int regnr)
|
||||
{
|
||||
unsigned char buf[REGISTER_REPORT_SIZE];
|
||||
int retval;
|
||||
|
||||
buf[0] = REGISTER_REPORT(regnr);
|
||||
put_unaligned_be16(radio->registers[regnr], &buf[1]);
|
||||
|
||||
retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
|
||||
|
||||
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)
|
||||
{
|
||||
unsigned char buf[ENTIRE_REPORT_SIZE];
|
||||
int retval;
|
||||
unsigned char regnr;
|
||||
|
||||
buf[0] = ENTIRE_REPORT;
|
||||
|
||||
retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
|
||||
|
||||
if (retval >= 0)
|
||||
for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
|
||||
radio->registers[regnr] = get_unaligned_be16(
|
||||
&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)
|
||||
{
|
||||
unsigned char buf[LED_REPORT_SIZE];
|
||||
int retval;
|
||||
|
||||
buf[0] = LED_REPORT;
|
||||
buf[1] = LED_COMMAND;
|
||||
buf[2] = led_state;
|
||||
|
||||
retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
|
||||
|
||||
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)
|
||||
{
|
||||
unsigned char buf[SCRATCH_REPORT_SIZE];
|
||||
int retval;
|
||||
|
||||
buf[0] = SCRATCH_REPORT;
|
||||
|
||||
retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
|
||||
|
||||
if (retval < 0)
|
||||
printk(KERN_WARNING DRIVER_NAME ": si470x_get_scratch: "
|
||||
"si470x_get_report returned %d\n", retval);
|
||||
else {
|
||||
radio->software_version = buf[1];
|
||||
radio->hardware_version = 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;
|
||||
unsigned char buf[RDS_REPORT_SIZE];
|
||||
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 {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": non-zero urb status (%d)\n", urb->status);
|
||||
goto resubmit; /* Maybe we can recover. */
|
||||
}
|
||||
}
|
||||
|
||||
/* safety checks */
|
||||
if (radio->disconnected)
|
||||
return;
|
||||
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
|
||||
goto resubmit;
|
||||
|
||||
if (urb->actual_length > 0) {
|
||||
/* Update RDS registers with URB data */
|
||||
buf[0] = RDS_REPORT;
|
||||
for (regnr = 0; 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) {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": resubmitting urb failed (%d)", retval);
|
||||
radio->int_in_running = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* 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 */
|
||||
mutex_lock(&radio->lock);
|
||||
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;
|
||||
}
|
||||
mutex_unlock(&radio->lock);
|
||||
|
||||
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);
|
||||
int retval = 0;
|
||||
|
||||
/* 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_open - file open
|
||||
*/
|
||||
static int si470x_fops_open(struct file *file)
|
||||
{
|
||||
struct si470x_device *radio = video_drvdata(file);
|
||||
int retval;
|
||||
|
||||
lock_kernel();
|
||||
radio->users++;
|
||||
|
||||
retval = usb_autopm_get_interface(radio->intf);
|
||||
if (retval < 0) {
|
||||
radio->users--;
|
||||
retval = -EIO;
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (radio->users == 1) {
|
||||
/* start radio */
|
||||
retval = si470x_start(radio);
|
||||
if (retval < 0) {
|
||||
usb_autopm_put_interface(radio->intf);
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* 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) {
|
||||
printk(KERN_INFO DRIVER_NAME
|
||||
": submitting int urb failed (%d)\n", retval);
|
||||
radio->int_in_running = 0;
|
||||
usb_autopm_put_interface(radio->intf);
|
||||
}
|
||||
}
|
||||
|
||||
done:
|
||||
unlock_kernel();
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_fops_release - file release
|
||||
*/
|
||||
static int si470x_fops_release(struct file *file)
|
||||
{
|
||||
struct si470x_device *radio = video_drvdata(file);
|
||||
int retval = 0;
|
||||
|
||||
/* safety check */
|
||||
if (!radio) {
|
||||
retval = -ENODEV;
|
||||
goto done;
|
||||
}
|
||||
|
||||
mutex_lock(&radio->disconnect_lock);
|
||||
radio->users--;
|
||||
if (radio->users == 0) {
|
||||
/* 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);
|
||||
}
|
||||
|
||||
if (radio->disconnected) {
|
||||
video_unregister_device(radio->videodev);
|
||||
kfree(radio->int_in_buffer);
|
||||
kfree(radio->buffer);
|
||||
kfree(radio);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
/* cancel read processes */
|
||||
wake_up_interruptible(&radio->read_queue);
|
||||
|
||||
/* stop radio */
|
||||
retval = si470x_stop(radio);
|
||||
usb_autopm_put_interface(radio->intf);
|
||||
}
|
||||
unlock:
|
||||
mutex_unlock(&radio->disconnect_lock);
|
||||
done:
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_fops - file operations interface
|
||||
*/
|
||||
const struct v4l2_file_operations si470x_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = si470x_fops_read,
|
||||
.poll = si470x_fops_poll,
|
||||
.ioctl = video_ioctl2,
|
||||
.open = si470x_fops_open,
|
||||
.release = si470x_fops_release,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* 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->version = DRIVER_KERNEL_VERSION;
|
||||
capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
|
||||
V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* 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;
|
||||
|
||||
/* private data allocation and initialization */
|
||||
radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
|
||||
if (!radio) {
|
||||
retval = -ENOMEM;
|
||||
goto err_initial;
|
||||
}
|
||||
radio->users = 0;
|
||||
radio->disconnected = 0;
|
||||
radio->usbdev = interface_to_usbdev(intf);
|
||||
radio->intf = intf;
|
||||
mutex_init(&radio->disconnect_lock);
|
||||
mutex_init(&radio->lock);
|
||||
|
||||
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 (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
|
||||
USB_DIR_IN) && ((endpoint->bmAttributes &
|
||||
USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT))
|
||||
radio->int_in_endpoint = endpoint;
|
||||
}
|
||||
if (!radio->int_in_endpoint) {
|
||||
printk(KERN_INFO DRIVER_NAME
|
||||
": could not find interrupt in endpoint\n");
|
||||
retval = -EIO;
|
||||
goto err_radio;
|
||||
}
|
||||
|
||||
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) {
|
||||
printk(KERN_INFO DRIVER_NAME
|
||||
"could not allocate int_in_buffer");
|
||||
retval = -ENOMEM;
|
||||
goto err_radio;
|
||||
}
|
||||
|
||||
radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
if (!radio->int_in_urb) {
|
||||
printk(KERN_INFO DRIVER_NAME "could not allocate int_in_urb");
|
||||
retval = -ENOMEM;
|
||||
goto err_intbuffer;
|
||||
}
|
||||
|
||||
/* video device allocation and initialization */
|
||||
radio->videodev = video_device_alloc();
|
||||
if (!radio->videodev) {
|
||||
retval = -ENOMEM;
|
||||
goto err_intbuffer;
|
||||
}
|
||||
memcpy(radio->videodev, &si470x_viddev_template,
|
||||
sizeof(si470x_viddev_template));
|
||||
video_set_drvdata(radio->videodev, radio);
|
||||
|
||||
/* show some infos about the specific si470x device */
|
||||
if (si470x_get_all_registers(radio) < 0) {
|
||||
retval = -EIO;
|
||||
goto err_video;
|
||||
}
|
||||
printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
|
||||
radio->registers[DEVICEID], radio->registers[CHIPID]);
|
||||
|
||||
/* get software and hardware versions */
|
||||
if (si470x_get_scratch_page_versions(radio) < 0) {
|
||||
retval = -EIO;
|
||||
goto err_video;
|
||||
}
|
||||
printk(KERN_INFO DRIVER_NAME
|
||||
": software version %d, hardware version %d\n",
|
||||
radio->software_version, radio->hardware_version);
|
||||
|
||||
/* check if device and firmware is current */
|
||||
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE)
|
||||
< RADIO_SW_VERSION_CURRENT) {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": This driver is known to work with "
|
||||
"firmware version %hu,\n", RADIO_SW_VERSION_CURRENT);
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": but the device has firmware version %hu.\n",
|
||||
radio->registers[CHIPID] & CHIPID_FIRMWARE);
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": If you have some trouble using this driver,\n");
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": 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 */
|
||||
|
||||
/* 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_video;
|
||||
}
|
||||
|
||||
/* rds buffer configuration */
|
||||
radio->wr_index = 0;
|
||||
radio->rd_index = 0;
|
||||
init_waitqueue_head(&radio->read_queue);
|
||||
|
||||
/* register video device */
|
||||
retval = video_register_device(radio->videodev, VFL_TYPE_RADIO,
|
||||
radio_nr);
|
||||
if (retval) {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": Could not register video device\n");
|
||||
goto err_all;
|
||||
}
|
||||
usb_set_intfdata(intf, radio);
|
||||
|
||||
return 0;
|
||||
err_all:
|
||||
kfree(radio->buffer);
|
||||
err_video:
|
||||
video_device_release(radio->videodev);
|
||||
err_intbuffer:
|
||||
kfree(radio->int_in_buffer);
|
||||
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)
|
||||
{
|
||||
printk(KERN_INFO DRIVER_NAME ": suspending now...\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_usb_driver_resume - resume the device
|
||||
*/
|
||||
static int si470x_usb_driver_resume(struct usb_interface *intf)
|
||||
{
|
||||
printk(KERN_INFO DRIVER_NAME ": resuming now...\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* 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->disconnect_lock);
|
||||
radio->disconnected = 1;
|
||||
usb_set_intfdata(intf, NULL);
|
||||
if (radio->users == 0) {
|
||||
/* set led to disconnect state */
|
||||
si470x_set_led_state(radio, BLINK_ORANGE_LED);
|
||||
|
||||
/* Free data structures. */
|
||||
usb_free_urb(radio->int_in_urb);
|
||||
|
||||
kfree(radio->int_in_buffer);
|
||||
video_unregister_device(radio->videodev);
|
||||
kfree(radio->buffer);
|
||||
kfree(radio);
|
||||
}
|
||||
mutex_unlock(&radio->disconnect_lock);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_usb_driver - usb driver interface
|
||||
*/
|
||||
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,
|
||||
.id_table = si470x_usb_driver_id_table,
|
||||
.supports_autosuspend = 1,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* Module Interface
|
||||
**************************************************************************/
|
||||
|
||||
/*
|
||||
* si470x_module_init - module init
|
||||
*/
|
||||
static int __init si470x_module_init(void)
|
||||
{
|
||||
printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n");
|
||||
return usb_register(&si470x_usb_driver);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_module_exit - module exit
|
||||
*/
|
||||
static void __exit si470x_module_exit(void)
|
||||
{
|
||||
usb_deregister(&si470x_usb_driver);
|
||||
}
|
||||
|
||||
|
||||
module_init(si470x_module_init);
|
||||
module_exit(si470x_module_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_VERSION(DRIVER_VERSION);
|
||||
|
|
@ -0,0 +1,201 @@
|
|||
/*
|
||||
* 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);
|
||||
Loading…
Reference in New Issue