mirror of https://gitee.com/openkylin/linux.git
1818 lines
48 KiB
C
1818 lines
48 KiB
C
/*
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* drivers/media/radio/radio-si470x.c
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*
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* Driver for USB radios for the Silicon Labs Si470x FM Radio Receivers:
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* - Silicon Labs USB FM Radio Reference Design
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* - ADS/Tech FM Radio Receiver (formerly Instant FM Music) (RDX-155-EF)
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*
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* Copyright (c) 2008 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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* User Notes:
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* - USB Audio is provided by the alsa snd_usb_audio module.
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* For listing you have to redirect the sound, for example using:
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* arecord -D hw:1,0 -r96000 -c2 -f S16_LE | artsdsp aplay -B -
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* - regarding module parameters in /sys/module/radio_si470x/parameters:
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* the contents of read-only files (0444) are not updated, even if
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* space, band and de are changed using private video controls
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* - increase tune_timeout, if you often get -EIO errors
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* - hw_freq_seek returns -EAGAIN, when timed out or band limit is reached
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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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*
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* ToDo:
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* - add firmware download/update support
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* - RDS support: interrupt mode, instead of polling
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* - add LED status output (check if that's not already done in firmware)
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*/
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/* driver definitions */
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#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
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#define DRIVER_NAME "radio-si470x"
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#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 8)
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#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
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#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
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#define DRIVER_VERSION "1.0.8"
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/* kernel includes */
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include <linux/version.h>
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#include <linux/videodev2.h>
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#include <linux/mutex.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include <media/rds.h>
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#include <asm/unaligned.h>
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/* USB Device ID List */
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static struct usb_device_id si470x_usb_driver_id_table[] = {
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/* Silicon Labs USB FM Radio Reference Design */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
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/* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) },
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/* Terminating entry */
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{ }
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};
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MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
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/**************************************************************************
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* Module Parameters
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**************************************************************************/
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/* Radio Nr */
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static int radio_nr = -1;
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module_param(radio_nr, int, 0);
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MODULE_PARM_DESC(radio_nr, "Radio Nr");
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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, 0);
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MODULE_PARM_DESC(radio_nr, "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, 0);
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MODULE_PARM_DESC(radio_nr, "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, 0);
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MODULE_PARM_DESC(radio_nr, "De-emphasis: 0=75us *1=50us*");
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/* USB timeout */
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static unsigned int usb_timeout = 500;
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module_param(usb_timeout, uint, 0);
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MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
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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, 0);
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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, 0);
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MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
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/* RDS buffer blocks */
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static unsigned int rds_buf = 100;
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module_param(rds_buf, uint, 0);
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MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
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/* RDS maximum block errors */
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static unsigned short max_rds_errors = 1;
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/* 0 means 0 errors requiring correction */
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/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
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/* 2 means 3-5 errors requiring correction */
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/* 3 means 6+ errors or errors in checkword, correction not possible */
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module_param(max_rds_errors, ushort, 0);
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MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
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/* RDS poll frequency */
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static unsigned int rds_poll_time = 40;
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/* 40 is used by the original USBRadio.exe */
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/* 50 is used by radio-cadet */
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/* 75 should be okay */
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/* 80 is the usual RDS receive interval */
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module_param(rds_poll_time, uint, 0);
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MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* Register Definitions
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**************************************************************************/
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#define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
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#define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
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#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
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#define DEVICEID 0 /* Device ID */
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#define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
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#define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
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#define CHIPID 1 /* Chip ID */
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#define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
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#define CHIPID_DEV 0x0200 /* bits 09..09: Device */
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#define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
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#define POWERCFG 2 /* Power Configuration */
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#define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
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#define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
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#define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
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#define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
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#define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
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#define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
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#define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
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#define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
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#define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
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#define CHANNEL 3 /* Channel */
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#define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
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#define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
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#define SYSCONFIG1 4 /* System Configuration 1 */
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#define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
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#define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
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#define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
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#define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
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#define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
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#define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
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#define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
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#define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
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#define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
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#define SYSCONFIG2 5 /* System Configuration 2 */
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#define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
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#define SYSCONFIG2_BAND 0x0080 /* bits 07..06: Band Select */
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#define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
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#define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
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#define SYSCONFIG3 6 /* System Configuration 3 */
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#define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
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#define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
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#define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
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#define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
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#define TEST1 7 /* Test 1 */
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#define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
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#define TEST2 8 /* Test 2 */
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/* TEST2 only contains reserved bits */
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#define BOOTCONFIG 9 /* Boot Configuration */
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/* BOOTCONFIG only contains reserved bits */
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#define STATUSRSSI 10 /* Status RSSI */
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#define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
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#define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
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#define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
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#define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
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#define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
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#define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
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#define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
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#define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
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#define READCHAN 11 /* Read Channel */
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#define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
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#define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
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#define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
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#define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
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#define RDSA 12 /* RDSA */
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#define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
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#define RDSB 13 /* RDSB */
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#define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
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#define RDSC 14 /* RDSC */
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#define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
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#define RDSD 15 /* RDSD */
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#define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
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/**************************************************************************
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* USB HID Reports
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**************************************************************************/
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/* Reports 1-16 give direct read/write access to the 16 Si470x registers */
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/* with the (REPORT_ID - 1) corresponding to the register address across USB */
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/* endpoint 0 using GET_REPORT and SET_REPORT */
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#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
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#define REGISTER_REPORT(reg) ((reg) + 1)
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/* Report 17 gives direct read/write access to the entire Si470x register */
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/* map across endpoint 0 using GET_REPORT and SET_REPORT */
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#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
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#define ENTIRE_REPORT 17
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/* Report 18 is used to send the lowest 6 Si470x registers up the HID */
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/* interrupt endpoint 1 to Windows every 20 milliseconds for status */
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#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
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#define RDS_REPORT 18
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/* Report 19: LED state */
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#define LED_REPORT_SIZE 3
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#define LED_REPORT 19
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/* Report 19: stream */
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#define STREAM_REPORT_SIZE 3
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#define STREAM_REPORT 19
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/* Report 20: scratch */
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#define SCRATCH_PAGE_SIZE 63
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#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1)
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#define SCRATCH_REPORT 20
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/* Reports 19-22: flash upgrade of the C8051F321 */
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#define WRITE_REPORT 19
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#define FLASH_REPORT 20
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#define CRC_REPORT 21
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#define RESPONSE_REPORT 22
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/* Report 23: currently unused, but can accept 60 byte reports on the HID */
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/* interrupt out endpoint 2 every 1 millisecond */
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#define UNUSED_REPORT 23
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/**************************************************************************
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* Software/Hardware Versions
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**************************************************************************/
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#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
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#define RADIO_SW_VERSION 7
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#define RADIO_SW_VERSION_CURRENT 15
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#define RADIO_HW_VERSION 1
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#define SCRATCH_PAGE_SW_VERSION 1
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#define SCRATCH_PAGE_HW_VERSION 2
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/**************************************************************************
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* LED State Definitions
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**************************************************************************/
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#define LED_COMMAND 0x35
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#define NO_CHANGE_LED 0x00
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#define ALL_COLOR_LED 0x01 /* streaming state */
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#define BLINK_GREEN_LED 0x02 /* connect state */
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#define BLINK_RED_LED 0x04
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#define BLINK_ORANGE_LED 0x10 /* disconnect state */
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#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */
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#define SOLID_RED_LED 0x40 /* bootload state */
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#define SOLID_ORANGE_LED 0x80
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/**************************************************************************
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* Stream State Definitions
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**************************************************************************/
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#define STREAM_COMMAND 0x36
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#define STREAM_VIDPID 0x00
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#define STREAM_AUDIO 0xff
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/**************************************************************************
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* Bootloader / Flash Commands
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**************************************************************************/
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/* unique id sent to bootloader and required to put into a bootload state */
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#define UNIQUE_BL_ID 0x34
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/* mask for the flash data */
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#define FLASH_DATA_MASK 0x55
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/* bootloader commands */
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#define GET_SW_VERSION_COMMAND 0x00
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#define SET_PAGE_COMMAND 0x01
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#define ERASE_PAGE_COMMAND 0x02
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#define WRITE_PAGE_COMMAND 0x03
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#define CRC_ON_PAGE_COMMAND 0x04
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#define READ_FLASH_BYTE_COMMAND 0x05
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#define RESET_DEVICE_COMMAND 0x06
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#define GET_HW_VERSION_COMMAND 0x07
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#define BLANK 0xff
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/* bootloader command responses */
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#define COMMAND_OK 0x01
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#define COMMAND_FAILED 0x02
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#define COMMAND_PENDING 0x03
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/* buffer sizes */
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#define COMMAND_BUFFER_SIZE 4
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#define RESPONSE_BUFFER_SIZE 2
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#define FLASH_BUFFER_SIZE 64
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|
#define CRC_BUFFER_SIZE 3
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
* General Driver Definitions
|
|
**************************************************************************/
|
|
|
|
/*
|
|
* si470x_device - private data
|
|
*/
|
|
struct si470x_device {
|
|
/* reference to USB and video device */
|
|
struct usb_device *usbdev;
|
|
struct usb_interface *intf;
|
|
struct video_device *videodev;
|
|
|
|
/* driver management */
|
|
unsigned int users;
|
|
unsigned char disconnected;
|
|
struct mutex disconnect_lock;
|
|
|
|
/* Silabs internal registers (0..15) */
|
|
unsigned short registers[RADIO_REGISTER_NUM];
|
|
|
|
/* RDS receive buffer */
|
|
struct delayed_work work;
|
|
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)
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
* General Driver Functions
|
|
**************************************************************************/
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
static 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
|
|
*/
|
|
static 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;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_get_rds_registers - read rds registers
|
|
*/
|
|
static int si470x_get_rds_registers(struct si470x_device *radio)
|
|
{
|
|
unsigned char buf[RDS_REPORT_SIZE];
|
|
int retval;
|
|
int size;
|
|
unsigned char regnr;
|
|
|
|
buf[0] = RDS_REPORT;
|
|
|
|
retval = usb_interrupt_msg(radio->usbdev,
|
|
usb_rcvintpipe(radio->usbdev, 1),
|
|
(void *) &buf, sizeof(buf), &size, usb_timeout);
|
|
if (size != sizeof(buf))
|
|
printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
|
|
"return size differs: %d != %zu\n", size, sizeof(buf));
|
|
if (retval < 0)
|
|
printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
|
|
"usb_interrupt_msg returned %d\n", retval);
|
|
|
|
if (retval >= 0)
|
|
for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
|
|
radio->registers[STATUSRSSI + regnr] =
|
|
get_unaligned_be16(
|
|
&buf[regnr * RADIO_REGISTER_SIZE + 1]);
|
|
|
|
return (retval < 0) ? -EINVAL : 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_set_chan - set the channel
|
|
*/
|
|
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
|
|
{
|
|
int retval;
|
|
unsigned long timeout;
|
|
bool timed_out = 0;
|
|
|
|
/* start tuning */
|
|
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
|
|
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
|
|
retval = si470x_set_register(radio, CHANNEL);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
/* wait till tune operation has completed */
|
|
timeout = jiffies + msecs_to_jiffies(tune_timeout);
|
|
do {
|
|
retval = si470x_get_register(radio, STATUSRSSI);
|
|
if (retval < 0)
|
|
goto stop;
|
|
timed_out = time_after(jiffies, timeout);
|
|
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
|
|
(!timed_out));
|
|
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
|
|
printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
|
|
if (timed_out)
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": tune timed out after %u ms\n", tune_timeout);
|
|
|
|
stop:
|
|
/* stop tuning */
|
|
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
|
|
retval = si470x_set_register(radio, CHANNEL);
|
|
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_get_freq - get the frequency
|
|
*/
|
|
static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
|
|
{
|
|
unsigned int spacing, band_bottom;
|
|
unsigned short chan;
|
|
int retval;
|
|
|
|
/* Spacing (kHz) */
|
|
switch (space) {
|
|
/* 0: 200 kHz (USA, Australia) */
|
|
case 0 : spacing = 0.200 * FREQ_MUL; break;
|
|
/* 1: 100 kHz (Europe, Japan) */
|
|
case 1 : spacing = 0.100 * FREQ_MUL; break;
|
|
/* 2: 50 kHz */
|
|
default: spacing = 0.050 * FREQ_MUL; break;
|
|
};
|
|
|
|
/* Bottom of Band (MHz) */
|
|
switch (band) {
|
|
/* 0: 87.5 - 108 MHz (USA, Europe) */
|
|
case 0 : band_bottom = 87.5 * FREQ_MUL; break;
|
|
/* 1: 76 - 108 MHz (Japan wide band) */
|
|
default: band_bottom = 76 * FREQ_MUL; break;
|
|
/* 2: 76 - 90 MHz (Japan) */
|
|
case 2 : band_bottom = 76 * FREQ_MUL; break;
|
|
};
|
|
|
|
/* read channel */
|
|
retval = si470x_get_register(radio, READCHAN);
|
|
chan = radio->registers[READCHAN] & READCHAN_READCHAN;
|
|
|
|
/* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
|
|
*freq = chan * spacing + band_bottom;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_set_freq - set the frequency
|
|
*/
|
|
static int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
|
|
{
|
|
unsigned int spacing, band_bottom;
|
|
unsigned short chan;
|
|
|
|
/* Spacing (kHz) */
|
|
switch (space) {
|
|
/* 0: 200 kHz (USA, Australia) */
|
|
case 0 : spacing = 0.200 * FREQ_MUL; break;
|
|
/* 1: 100 kHz (Europe, Japan) */
|
|
case 1 : spacing = 0.100 * FREQ_MUL; break;
|
|
/* 2: 50 kHz */
|
|
default: spacing = 0.050 * FREQ_MUL; break;
|
|
};
|
|
|
|
/* Bottom of Band (MHz) */
|
|
switch (band) {
|
|
/* 0: 87.5 - 108 MHz (USA, Europe) */
|
|
case 0 : band_bottom = 87.5 * FREQ_MUL; break;
|
|
/* 1: 76 - 108 MHz (Japan wide band) */
|
|
default: band_bottom = 76 * FREQ_MUL; break;
|
|
/* 2: 76 - 90 MHz (Japan) */
|
|
case 2 : band_bottom = 76 * FREQ_MUL; break;
|
|
};
|
|
|
|
/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
|
|
chan = (freq - band_bottom) / spacing;
|
|
|
|
return si470x_set_chan(radio, chan);
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_set_seek - set seek
|
|
*/
|
|
static int si470x_set_seek(struct si470x_device *radio,
|
|
unsigned int wrap_around, unsigned int seek_upward)
|
|
{
|
|
int retval = 0;
|
|
unsigned long timeout;
|
|
bool timed_out = 0;
|
|
|
|
/* start seeking */
|
|
radio->registers[POWERCFG] |= POWERCFG_SEEK;
|
|
if (wrap_around == 1)
|
|
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
|
|
else
|
|
radio->registers[POWERCFG] |= POWERCFG_SKMODE;
|
|
if (seek_upward == 1)
|
|
radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
|
|
else
|
|
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
|
|
retval = si470x_set_register(radio, POWERCFG);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
/* wait till seek operation has completed */
|
|
timeout = jiffies + msecs_to_jiffies(seek_timeout);
|
|
do {
|
|
retval = si470x_get_register(radio, STATUSRSSI);
|
|
if (retval < 0)
|
|
goto stop;
|
|
timed_out = time_after(jiffies, timeout);
|
|
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
|
|
(!timed_out));
|
|
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
|
|
printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
|
|
if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": seek failed / band limit reached\n");
|
|
if (timed_out)
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": seek timed out after %u ms\n", seek_timeout);
|
|
|
|
stop:
|
|
/* stop seeking */
|
|
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
|
|
retval = si470x_set_register(radio, POWERCFG);
|
|
|
|
done:
|
|
/* try again, if timed out */
|
|
if ((retval == 0) && timed_out)
|
|
retval = -EAGAIN;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_start - switch on radio
|
|
*/
|
|
static int si470x_start(struct si470x_device *radio)
|
|
{
|
|
int retval;
|
|
|
|
/* powercfg */
|
|
radio->registers[POWERCFG] =
|
|
POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
|
|
retval = si470x_set_register(radio, POWERCFG);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
/* sysconfig 1 */
|
|
radio->registers[SYSCONFIG1] = SYSCONFIG1_DE;
|
|
retval = si470x_set_register(radio, SYSCONFIG1);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
/* sysconfig 2 */
|
|
radio->registers[SYSCONFIG2] =
|
|
(0x3f << 8) | /* SEEKTH */
|
|
((band << 6) & SYSCONFIG2_BAND) | /* BAND */
|
|
((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
|
|
15; /* VOLUME (max) */
|
|
retval = si470x_set_register(radio, SYSCONFIG2);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
/* reset last channel */
|
|
retval = si470x_set_chan(radio,
|
|
radio->registers[CHANNEL] & CHANNEL_CHAN);
|
|
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_stop - switch off radio
|
|
*/
|
|
static int si470x_stop(struct si470x_device *radio)
|
|
{
|
|
int retval;
|
|
|
|
/* sysconfig 1 */
|
|
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
|
|
retval = si470x_set_register(radio, SYSCONFIG1);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
/* powercfg */
|
|
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
|
|
/* POWERCFG_ENABLE has to automatically go low */
|
|
radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
|
|
retval = si470x_set_register(radio, POWERCFG);
|
|
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_rds_on - switch on rds reception
|
|
*/
|
|
static int si470x_rds_on(struct si470x_device *radio)
|
|
{
|
|
int retval;
|
|
|
|
/* sysconfig 1 */
|
|
mutex_lock(&radio->lock);
|
|
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
|
|
retval = si470x_set_register(radio, SYSCONFIG1);
|
|
if (retval < 0)
|
|
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
|
|
mutex_unlock(&radio->lock);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
* RDS Driver Functions
|
|
**************************************************************************/
|
|
|
|
/*
|
|
* si470x_rds - rds processing function
|
|
*/
|
|
static void si470x_rds(struct si470x_device *radio)
|
|
{
|
|
unsigned char blocknum;
|
|
unsigned short bler; /* rds block errors */
|
|
unsigned short rds;
|
|
unsigned char tmpbuf[3];
|
|
|
|
/* get rds blocks */
|
|
if (si470x_get_rds_registers(radio) < 0)
|
|
return;
|
|
if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
|
|
/* No RDS group ready */
|
|
return;
|
|
}
|
|
if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
|
|
/* RDS decoder not synchronized */
|
|
return;
|
|
}
|
|
|
|
/* copy all four RDS blocks to internal buffer */
|
|
mutex_lock(&radio->lock);
|
|
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;
|
|
}
|
|
}
|
|
mutex_unlock(&radio->lock);
|
|
|
|
/* wake up read queue */
|
|
if (radio->wr_index != radio->rd_index)
|
|
wake_up_interruptible(&radio->read_queue);
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_work - rds work function
|
|
*/
|
|
static void si470x_work(struct work_struct *work)
|
|
{
|
|
struct si470x_device *radio = container_of(work, struct si470x_device,
|
|
work.work);
|
|
|
|
/* safety checks */
|
|
if (radio->disconnected)
|
|
return;
|
|
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
|
|
return;
|
|
|
|
si470x_rds(radio);
|
|
schedule_delayed_work(&radio->work, msecs_to_jiffies(rds_poll_time));
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
* 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);
|
|
schedule_delayed_work(&radio->work,
|
|
msecs_to_jiffies(rds_poll_time));
|
|
}
|
|
|
|
/* 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);
|
|
schedule_delayed_work(&radio->work,
|
|
msecs_to_jiffies(rds_poll_time));
|
|
}
|
|
|
|
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 inode *inode, 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) {
|
|
retval = si470x_start(radio);
|
|
if (retval < 0)
|
|
usb_autopm_put_interface(radio->intf);
|
|
}
|
|
|
|
done:
|
|
unlock_kernel();
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_fops_release - file release
|
|
*/
|
|
static int si470x_fops_release(struct inode *inode, 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) {
|
|
if (radio->disconnected) {
|
|
video_unregister_device(radio->videodev);
|
|
kfree(radio->buffer);
|
|
kfree(radio);
|
|
goto unlock;
|
|
}
|
|
|
|
/* stop rds reception */
|
|
cancel_delayed_work_sync(&radio->work);
|
|
|
|
/* cancel read processes */
|
|
wake_up_interruptible(&radio->read_queue);
|
|
|
|
retval = si470x_stop(radio);
|
|
usb_autopm_put_interface(radio->intf);
|
|
}
|
|
|
|
unlock:
|
|
mutex_unlock(&radio->disconnect_lock);
|
|
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_fops - file operations interface
|
|
*/
|
|
static const struct file_operations si470x_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.read = si470x_fops_read,
|
|
.poll = si470x_fops_poll,
|
|
.ioctl = video_ioctl2,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = v4l_compat_ioctl32,
|
|
#endif
|
|
.open = si470x_fops_open,
|
|
.release = si470x_fops_release,
|
|
};
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
* Video4Linux Interface
|
|
**************************************************************************/
|
|
|
|
/*
|
|
* si470x_v4l2_queryctrl - query control
|
|
*/
|
|
static struct v4l2_queryctrl si470x_v4l2_queryctrl[] = {
|
|
/* HINT: the disabled controls are only here to satify kradio and such apps */
|
|
{
|
|
.id = V4L2_CID_AUDIO_VOLUME,
|
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
|
.name = "Volume",
|
|
.minimum = 0,
|
|
.maximum = 15,
|
|
.step = 1,
|
|
.default_value = 15,
|
|
},
|
|
{
|
|
.id = V4L2_CID_AUDIO_BALANCE,
|
|
.flags = V4L2_CTRL_FLAG_DISABLED,
|
|
},
|
|
{
|
|
.id = V4L2_CID_AUDIO_BASS,
|
|
.flags = V4L2_CTRL_FLAG_DISABLED,
|
|
},
|
|
{
|
|
.id = V4L2_CID_AUDIO_TREBLE,
|
|
.flags = V4L2_CTRL_FLAG_DISABLED,
|
|
},
|
|
{
|
|
.id = V4L2_CID_AUDIO_MUTE,
|
|
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
|
.name = "Mute",
|
|
.minimum = 0,
|
|
.maximum = 1,
|
|
.step = 1,
|
|
.default_value = 1,
|
|
},
|
|
{
|
|
.id = V4L2_CID_AUDIO_LOUDNESS,
|
|
.flags = V4L2_CTRL_FLAG_DISABLED,
|
|
},
|
|
};
|
|
|
|
|
|
/*
|
|
* si470x_vidioc_querycap - query device capabilities
|
|
*/
|
|
static int si470x_vidioc_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *capability)
|
|
{
|
|
strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
|
|
strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
|
|
sprintf(capability->bus_info, "USB");
|
|
capability->version = DRIVER_KERNEL_VERSION;
|
|
capability->capabilities = V4L2_CAP_HW_FREQ_SEEK |
|
|
V4L2_CAP_TUNER | V4L2_CAP_RADIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_vidioc_g_input - get input
|
|
*/
|
|
static int si470x_vidioc_g_input(struct file *file, void *priv,
|
|
unsigned int *i)
|
|
{
|
|
*i = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_vidioc_s_input - set input
|
|
*/
|
|
static int si470x_vidioc_s_input(struct file *file, void *priv, unsigned int i)
|
|
{
|
|
int retval = 0;
|
|
|
|
/* safety checks */
|
|
if (i != 0)
|
|
retval = -EINVAL;
|
|
|
|
if (retval < 0)
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": set input failed with %d\n", retval);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_vidioc_queryctrl - enumerate control items
|
|
*/
|
|
static int si470x_vidioc_queryctrl(struct file *file, void *priv,
|
|
struct v4l2_queryctrl *qc)
|
|
{
|
|
unsigned char i;
|
|
int retval = -EINVAL;
|
|
|
|
/* safety checks */
|
|
if (!qc->id)
|
|
goto done;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(si470x_v4l2_queryctrl); i++) {
|
|
if (qc->id == si470x_v4l2_queryctrl[i].id) {
|
|
memcpy(qc, &(si470x_v4l2_queryctrl[i]), sizeof(*qc));
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
int retval = 0;
|
|
|
|
/* safety checks */
|
|
if (audio->index != 0) {
|
|
retval = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
strcpy(audio->name, "Radio");
|
|
audio->capability = V4L2_AUDCAP_STEREO;
|
|
|
|
done:
|
|
if (retval < 0)
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": get audio failed with %d\n", retval);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_vidioc_s_audio - set audio attributes
|
|
*/
|
|
static int si470x_vidioc_s_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *audio)
|
|
{
|
|
int retval = 0;
|
|
|
|
/* safety checks */
|
|
if (audio->index != 0) {
|
|
retval = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
if (retval < 0)
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": set audio failed with %d\n", retval);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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) && (tuner->type != V4L2_TUNER_RADIO)) {
|
|
retval = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
retval = si470x_get_register(radio, STATUSRSSI);
|
|
if (retval < 0)
|
|
goto done;
|
|
|
|
strcpy(tuner->name, "FM");
|
|
switch (band) {
|
|
/* 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;
|
|
};
|
|
tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
|
|
tuner->capability = V4L2_TUNER_CAP_LOW;
|
|
|
|
/* Stereo indicator == Stereo (instead of Mono) */
|
|
if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 1)
|
|
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 */
|
|
tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI)
|
|
* 0x0101;
|
|
|
|
/* 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 = 0;
|
|
|
|
/* safety checks */
|
|
if (radio->disconnected) {
|
|
retval = -EIO;
|
|
goto done;
|
|
}
|
|
if ((tuner->index != 0) && (tuner->type != V4L2_TUNER_RADIO)) {
|
|
retval = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (tuner->audmode == V4L2_TUNER_MODE_MONO)
|
|
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
|
|
else
|
|
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
|
|
|
|
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) && (freq->type != V4L2_TUNER_RADIO)) {
|
|
retval = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
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) && (freq->type != V4L2_TUNER_RADIO)) {
|
|
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) && (seek->type != V4L2_TUNER_RADIO)) {
|
|
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;
|
|
}
|
|
|
|
static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
|
|
.vidioc_querycap = si470x_vidioc_querycap,
|
|
.vidioc_g_input = si470x_vidioc_g_input,
|
|
.vidioc_s_input = si470x_vidioc_s_input,
|
|
.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_s_audio = si470x_vidioc_s_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_tamples - video device interface
|
|
*/
|
|
static struct video_device si470x_viddev_template = {
|
|
.fops = &si470x_fops,
|
|
.ioctl_ops = &si470x_ioctl_ops,
|
|
.name = DRIVER_NAME,
|
|
.release = video_device_release,
|
|
};
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
* 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;
|
|
int 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);
|
|
|
|
/* video device allocation and initialization */
|
|
radio->videodev = video_device_alloc();
|
|
if (!radio->videodev) {
|
|
retval = -ENOMEM;
|
|
goto err_radio;
|
|
}
|
|
memcpy(radio->videodev, &si470x_viddev_template,
|
|
sizeof(si470x_viddev_template));
|
|
video_set_drvdata(radio->videodev, radio);
|
|
|
|
/* show some infos about the specific device */
|
|
if (si470x_get_all_registers(radio) < 0) {
|
|
retval = -EIO;
|
|
goto err_all;
|
|
}
|
|
printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
|
|
radio->registers[DEVICEID], radio->registers[CHIPID]);
|
|
|
|
/* check if 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 "
|
|
"video4linux-list@redhat.com\n");
|
|
}
|
|
|
|
/* set initial frequency */
|
|
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
|
|
|
|
/* rds buffer allocation */
|
|
radio->buf_size = rds_buf * 3;
|
|
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
|
|
if (!radio->buffer) {
|
|
retval = -EIO;
|
|
goto err_all;
|
|
}
|
|
|
|
/* rds buffer configuration */
|
|
radio->wr_index = 0;
|
|
radio->rd_index = 0;
|
|
init_waitqueue_head(&radio->read_queue);
|
|
|
|
/* prepare rds work function */
|
|
INIT_DELAYED_WORK(&radio->work, si470x_work);
|
|
|
|
/* 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:
|
|
video_device_release(radio->videodev);
|
|
kfree(radio->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)
|
|
{
|
|
struct si470x_device *radio = usb_get_intfdata(intf);
|
|
|
|
printk(KERN_INFO DRIVER_NAME ": suspending now...\n");
|
|
|
|
cancel_delayed_work_sync(&radio->work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* si470x_usb_driver_resume - resume the device
|
|
*/
|
|
static int si470x_usb_driver_resume(struct usb_interface *intf)
|
|
{
|
|
struct si470x_device *radio = usb_get_intfdata(intf);
|
|
|
|
printk(KERN_INFO DRIVER_NAME ": resuming now...\n");
|
|
|
|
mutex_lock(&radio->lock);
|
|
if (radio->users && radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)
|
|
schedule_delayed_work(&radio->work,
|
|
msecs_to_jiffies(rds_poll_time));
|
|
mutex_unlock(&radio->lock);
|
|
|
|
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;
|
|
cancel_delayed_work_sync(&radio->work);
|
|
usb_set_intfdata(intf, NULL);
|
|
if (radio->users == 0) {
|
|
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);
|