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>
To compile this driver as a module, choose M here: the
module will be called dsbr100.
-config USB_SI470X
- tristate "Silicon Labs Si470x FM Radio Receiver support"
- depends on USB && VIDEO_V4L2
- ---help---
- This is a driver for USB devices with the Silicon Labs SI470x
- chip. Currently these devices are known to work:
- - 10c4:818a: Silicon Labs USB FM Radio Reference Design
- - 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music)
- - 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
-
- Sound is provided by the ALSA USB Audio/MIDI driver. Therefore
- if you don't want to use the device solely for RDS receiving,
- it is recommended to also select SND_USB_AUDIO.
-
- Please have a look at the documentation, especially on how
- to redirect the audio stream from the radio to your sound device:
- Documentation/video4linux/si470x.txt
-
- Say Y here if you want to connect this type of radio to your
- computer's USB port.
+config RADIO_SI470X
+ bool "Silicon Labs Si470x FM Radio Receiver support"
+ depends on VIDEO_V4L2
- To compile this driver as a module, choose M here: the
- module will be called radio-si470x.
+source "drivers/media/radio/si470x/Kconfig"
config USB_MR800
tristate "AverMedia MR 800 USB FM radio support"
obj-$(CONFIG_RADIO_TRUST) += radio-trust.o
obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o
obj-$(CONFIG_USB_DSBR) += dsbr100.o
-obj-$(CONFIG_USB_SI470X) += radio-si470x.o
+obj-$(CONFIG_RADIO_SI470X) += si470x/
obj-$(CONFIG_USB_MR800) += radio-mr800.o
obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
+++ /dev/null
-/*
- * drivers/media/radio/radio-si470x.c
- *
- * Driver for USB radios for the Silicon Labs Si470x FM Radio Receivers:
- * - Silicon Labs USB FM Radio Reference Design
- * - ADS/Tech FM Radio Receiver (formerly Instant FM Music) (RDX-155-EF)
- * - KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
- * - Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear)
- *
- * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-
-/*
- * History:
- * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.0
- * - First working version
- * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.1
- * - Improved error handling, every function now returns errno
- * - Improved multi user access (start/mute/stop)
- * - Channel doesn't get lost anymore after start/mute/stop
- * - RDS support added (polling mode via interrupt EP 1)
- * - marked default module parameters with *value*
- * - switched from bit structs to bit masks
- * - header file cleaned and integrated
- * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.2
- * - hex values are now lower case
- * - commented USB ID for ADS/Tech moved on todo list
- * - blacklisted si470x in hid-quirks.c
- * - rds buffer handling functions integrated into *_work, *_read
- * - rds_command in si470x_poll exchanged against simple retval
- * - check for firmware version 15
- * - code order and prototypes still remain the same
- * - spacing and bottom of band codes remain the same
- * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.3
- * - code reordered to avoid function prototypes
- * - switch/case defaults are now more user-friendly
- * - unified comment style
- * - applied all checkpatch.pl v1.12 suggestions
- * except the warning about the too long lines with bit comments
- * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
- * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.4
- * - avoid poss. locking when doing copy_to_user which may sleep
- * - RDS is automatically activated on read now
- * - code cleaned of unnecessary rds_commands
- * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
- * (thanks to Guillaume RAMOUSSE)
- * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.5
- * - number of seek_retries changed to tune_timeout
- * - fixed problem with incomplete tune operations by own buffers
- * - optimization of variables and printf types
- * - improved error logging
- * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Oliver Neukum <oliver@neukum.org>
- * Version 1.0.6
- * - fixed coverity checker warnings in *_usb_driver_disconnect
- * - probe()/open() race by correct ordering in probe()
- * - DMA coherency rules by separate allocation of all buffers
- * - use of endianness macros
- * - abuse of spinlock, replaced by mutex
- * - racy handling of timer in disconnect,
- * replaced by delayed_work
- * - racy interruptible_sleep_on(),
- * replaced with wait_event_interruptible()
- * - handle signals in read()
- * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Oliver Neukum <oliver@neukum.org>
- * Version 1.0.7
- * - usb autosuspend support
- * - unplugging fixed
- * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
- * Version 1.0.8
- * - hardware frequency seek support
- * - afc indication
- * - more safety checks, let si470x_get_freq return errno
- * - vidioc behavior corrected according to v4l2 spec
- * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
- * - add support for KWorld USB FM Radio FM700
- * - blacklisted KWorld radio in hid-core.c and hid-ids.h
- * 2008-12-03 Mark Lord <mlord@pobox.com>
- * - add support for DealExtreme USB Radio
- * 2009-01-31 Bob Ross <pigiron@gmx.com>
- * - correction of stereo detection/setting
- * - correction of signal strength indicator scaling
- * 2009-01-31 Rick Bronson <rick@efn.org>
- * Tobias Lorenz <tobias.lorenz@gmx.net>
- * - add LED status output
- * - get HW/SW version from scratchpad
- * 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
- * Version 1.0.10
- * - add support for interrupt mode for RDS endpoint,
- * instead of polling.
- * Improves RDS reception significantly
- *
- * ToDo:
- * - add firmware download/update support
- */
-
-
-/* driver definitions */
-#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
-#define DRIVER_NAME "radio-si470x"
-#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 10)
-#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
-#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
-#define DRIVER_VERSION "1.0.10"
-
-
-/* kernel includes */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/smp_lock.h>
-#include <linux/input.h>
-#include <linux/usb.h>
-#include <linux/hid.h>
-#include <linux/version.h>
-#include <linux/videodev2.h>
-#include <linux/mutex.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-ioctl.h>
-#include <media/rds.h>
-#include <asm/unaligned.h>
-
-
-/* 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");
-
-/* Spacing (kHz) */
-/* 0: 200 kHz (USA, Australia) */
-/* 1: 100 kHz (Europe, Japan) */
-/* 2: 50 kHz */
-static unsigned short space = 2;
-module_param(space, ushort, 0444);
-MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
-
-/* Bottom of Band (MHz) */
-/* 0: 87.5 - 108 MHz (USA, Europe)*/
-/* 1: 76 - 108 MHz (Japan wide band) */
-/* 2: 76 - 90 MHz (Japan) */
-static unsigned short band = 1;
-module_param(band, ushort, 0444);
-MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
-
-/* De-emphasis */
-/* 0: 75 us (USA) */
-/* 1: 50 us (Europe, Australia, Japan) */
-static unsigned short de = 1;
-module_param(de, ushort, 0444);
-MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
-
-/* USB timeout */
-static unsigned int usb_timeout = 500;
-module_param(usb_timeout, uint, 0644);
-MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
-
-/* Tune timeout */
-static unsigned int tune_timeout = 3000;
-module_param(tune_timeout, uint, 0644);
-MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
-
-/* Seek timeout */
-static unsigned int seek_timeout = 5000;
-module_param(seek_timeout, uint, 0644);
-MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
-
-/* RDS buffer blocks */
-static unsigned int rds_buf = 100;
-module_param(rds_buf, uint, 0444);
-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*");
-
-
-/**************************************************************************
- * Register Definitions
- **************************************************************************/
-#define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
-#define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
-#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
-
-#define DEVICEID 0 /* Device ID */
-#define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
-#define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
-
-#define CHIPID 1 /* Chip ID */
-#define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
-#define CHIPID_DEV 0x0200 /* bits 09..09: Device */
-#define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
-
-#define POWERCFG 2 /* Power Configuration */
-#define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
-#define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
-#define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
-#define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
-#define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
-#define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
-#define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
-#define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
-#define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
-
-#define CHANNEL 3 /* Channel */
-#define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
-#define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
-
-#define SYSCONFIG1 4 /* System Configuration 1 */
-#define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
-#define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
-#define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
-#define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
-#define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
-#define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
-#define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
-#define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
-#define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
-
-#define SYSCONFIG2 5 /* System Configuration 2 */
-#define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
-#define SYSCONFIG2_BAND 0x0080 /* bits 07..06: Band Select */
-#define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
-#define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
-
-#define SYSCONFIG3 6 /* System Configuration 3 */
-#define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
-#define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
-#define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
-#define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
-
-#define TEST1 7 /* Test 1 */
-#define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
-
-#define TEST2 8 /* Test 2 */
-/* TEST2 only contains reserved bits */
-
-#define BOOTCONFIG 9 /* Boot Configuration */
-/* BOOTCONFIG only contains reserved bits */
-
-#define STATUSRSSI 10 /* Status RSSI */
-#define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
-#define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
-#define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
-#define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
-#define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
-#define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
-#define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
-#define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
-
-#define READCHAN 11 /* Read Channel */
-#define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
-#define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
-#define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
-#define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
-
-#define RDSA 12 /* RDSA */
-#define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
-
-#define RDSB 13 /* RDSB */
-#define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
-
-#define RDSC 14 /* RDSC */
-#define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
-
-#define RDSD 15 /* RDSD */
-#define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
-
-
-
-/**************************************************************************
- * USB HID Reports
- **************************************************************************/
-
-/* 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 Definitions
- **************************************************************************/
-
-/*
- * si470x_device - private data
- */
-struct si470x_device {
- /* reference to USB and video device */
- struct usb_device *usbdev;
- struct usb_interface *intf;
- struct video_device *videodev;
-
- /* Interrupt endpoint handling */
- char *int_in_buffer;
- struct usb_endpoint_descriptor *int_in_endpoint;
- struct urb *int_in_urb;
- int int_in_running;
-
- /* driver management */
- unsigned int users;
- unsigned char disconnected;
- struct mutex disconnect_lock;
-
- /* Silabs internal registers (0..15) */
- unsigned short registers[RADIO_REGISTER_NUM];
-
- /* RDS receive buffer */
- wait_queue_head_t read_queue;
- struct mutex lock; /* buffer locking */
- unsigned char *buffer; /* size is always multiple of three */
- unsigned int buf_size;
- unsigned int rd_index;
- unsigned int wr_index;
-
- /* scratch page */
- unsigned char software_version;
- unsigned char hardware_version;
-};
-
-
-/*
- * The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW,
- * 62.5 kHz otherwise.
- * The tuner is able to have a channel spacing of 50, 100 or 200 kHz.
- * tuner->capability is therefore set to V4L2_TUNER_CAP_LOW
- * The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000
- */
-#define FREQ_MUL (1000000 / 62.5)
-
-
-
-/**************************************************************************
- * General Driver Functions - REGISTER_REPORTs
- **************************************************************************/
-
-/*
- * 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_set_chan - set the channel
- */
-static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
-{
- int retval;
- unsigned long timeout;
- bool timed_out = 0;
-
- /* start tuning */
- radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
- radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
- retval = si470x_set_register(radio, CHANNEL);
- if (retval < 0)
- goto done;
-
- /* wait till tune operation has completed */
- timeout = jiffies + msecs_to_jiffies(tune_timeout);
- do {
- retval = si470x_get_register(radio, STATUSRSSI);
- if (retval < 0)
- goto stop;
- timed_out = time_after(jiffies, timeout);
- } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
- (!timed_out));
- if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
- printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
- if (timed_out)
- printk(KERN_WARNING DRIVER_NAME
- ": tune timed out after %u ms\n", tune_timeout);
-
-stop:
- /* stop tuning */
- radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
- retval = si470x_set_register(radio, CHANNEL);
-
-done:
- return retval;
-}
-
-
-/*
- * si470x_get_freq - get the frequency
- */
-static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
-{
- unsigned int spacing, band_bottom;
- unsigned short chan;
- int retval;
-
- /* Spacing (kHz) */
- switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
- /* 0: 200 kHz (USA, Australia) */
- case 0:
- spacing = 0.200 * FREQ_MUL; break;
- /* 1: 100 kHz (Europe, Japan) */
- case 1:
- spacing = 0.100 * FREQ_MUL; break;
- /* 2: 50 kHz */
- default:
- spacing = 0.050 * FREQ_MUL; break;
- };
-
- /* Bottom of Band (MHz) */
- switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
- /* 0: 87.5 - 108 MHz (USA, Europe) */
- case 0:
- band_bottom = 87.5 * FREQ_MUL; break;
- /* 1: 76 - 108 MHz (Japan wide band) */
- default:
- band_bottom = 76 * FREQ_MUL; break;
- /* 2: 76 - 90 MHz (Japan) */
- case 2:
- band_bottom = 76 * FREQ_MUL; break;
- };
-
- /* read channel */
- retval = si470x_get_register(radio, READCHAN);
- chan = radio->registers[READCHAN] & READCHAN_READCHAN;
-
- /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
- *freq = chan * spacing + band_bottom;
-
- return retval;
-}
-
-
-/*
- * si470x_set_freq - set the frequency
- */
-static int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
-{
- unsigned int spacing, band_bottom;
- unsigned short chan;
-
- /* Spacing (kHz) */
- switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
- /* 0: 200 kHz (USA, Australia) */
- case 0:
- spacing = 0.200 * FREQ_MUL; break;
- /* 1: 100 kHz (Europe, Japan) */
- case 1:
- spacing = 0.100 * FREQ_MUL; break;
- /* 2: 50 kHz */
- default:
- spacing = 0.050 * FREQ_MUL; break;
- };
-
- /* Bottom of Band (MHz) */
- switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
- /* 0: 87.5 - 108 MHz (USA, Europe) */
- case 0:
- band_bottom = 87.5 * FREQ_MUL; break;
- /* 1: 76 - 108 MHz (Japan wide band) */
- default:
- band_bottom = 76 * FREQ_MUL; break;
- /* 2: 76 - 90 MHz (Japan) */
- case 2:
- band_bottom = 76 * FREQ_MUL; break;
- };
-
- /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
- chan = (freq - band_bottom) / spacing;
-
- return si470x_set_chan(radio, chan);
-}
-
-
-/*
- * si470x_set_seek - set seek
- */
-static int si470x_set_seek(struct si470x_device *radio,
- unsigned int wrap_around, unsigned int seek_upward)
-{
- int retval = 0;
- unsigned long timeout;
- bool timed_out = 0;
-
- /* start seeking */
- radio->registers[POWERCFG] |= POWERCFG_SEEK;
- if (wrap_around == 1)
- radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
- else
- radio->registers[POWERCFG] |= POWERCFG_SKMODE;
- if (seek_upward == 1)
- radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
- else
- radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
- retval = si470x_set_register(radio, POWERCFG);
- if (retval < 0)
- goto done;
-
- /* wait till seek operation has completed */
- timeout = jiffies + msecs_to_jiffies(seek_timeout);
- do {
- retval = si470x_get_register(radio, STATUSRSSI);
- if (retval < 0)
- goto stop;
- timed_out = time_after(jiffies, timeout);
- } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
- (!timed_out));
- if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
- printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
- if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
- printk(KERN_WARNING DRIVER_NAME
- ": seek failed / band limit reached\n");
- if (timed_out)
- printk(KERN_WARNING DRIVER_NAME
- ": seek timed out after %u ms\n", seek_timeout);
-
-stop:
- /* stop seeking */
- radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
- retval = si470x_set_register(radio, POWERCFG);
-
-done:
- /* try again, if timed out */
- if ((retval == 0) && timed_out)
- retval = -EAGAIN;
-
- return retval;
-}
-
-
-/*
- * si470x_start - switch on radio
- */
-static int si470x_start(struct si470x_device *radio)
-{
- int retval;
-
- /* powercfg */
- radio->registers[POWERCFG] =
- POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
- retval = si470x_set_register(radio, POWERCFG);
- if (retval < 0)
- goto done;
-
- /* sysconfig 1 */
- radio->registers[SYSCONFIG1] = SYSCONFIG1_DE;
- retval = si470x_set_register(radio, SYSCONFIG1);
- if (retval < 0)
- goto done;
-
- /* sysconfig 2 */
- radio->registers[SYSCONFIG2] =
- (0x3f << 8) | /* SEEKTH */
- ((band << 6) & SYSCONFIG2_BAND) | /* BAND */
- ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
- 15; /* VOLUME (max) */
- retval = si470x_set_register(radio, SYSCONFIG2);
- if (retval < 0)
- goto done;
-
- /* reset last channel */
- retval = si470x_set_chan(radio,
- radio->registers[CHANNEL] & CHANNEL_CHAN);
-
-done:
- return retval;
-}
-
-
-/*
- * si470x_stop - switch off radio
- */
-static int si470x_stop(struct si470x_device *radio)
-{
- int retval;
-
- /* sysconfig 1 */
- radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
- retval = si470x_set_register(radio, SYSCONFIG1);
- if (retval < 0)
- goto done;
-
- /* powercfg */
- radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
- /* POWERCFG_ENABLE has to automatically go low */
- radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
- retval = si470x_set_register(radio, POWERCFG);
-
-done:
- return retval;
-}
-
-
-/*
- * si470x_rds_on - switch on rds reception
- */
-static int si470x_rds_on(struct si470x_device *radio)
-{
- int retval;
-
- /* sysconfig 1 */
- mutex_lock(&radio->lock);
- radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
- retval = si470x_set_register(radio, SYSCONFIG1);
- if (retval < 0)
- radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
- mutex_unlock(&radio->lock);
-
- return retval;
-}
-
-
-
-/**************************************************************************
- * General Driver Functions - ENTIRE_REPORT
- **************************************************************************/
-
-/*
- * 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
- */
-static 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
- */
-static 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;
-}
-
-
-/*
- * si470x_vidioc_queryctrl - enumerate control items
- */
-static int si470x_vidioc_queryctrl(struct file *file, void *priv,
- struct v4l2_queryctrl *qc)
-{
- int retval = -EINVAL;
-
- /* abort if qc->id is below V4L2_CID_BASE */
- if (qc->id < V4L2_CID_BASE)
- goto done;
-
- /* search video control */
- switch (qc->id) {
- case V4L2_CID_AUDIO_VOLUME:
- return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
- case V4L2_CID_AUDIO_MUTE:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
- }
-
- /* disable unsupported base controls */
- /* to satisfy kradio and such apps */
- if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
- qc->flags = V4L2_CTRL_FLAG_DISABLED;
- retval = 0;
- }
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": query controls failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_g_ctrl - get the value of a control
- */
-static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = 0;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_VOLUME:
- ctrl->value = radio->registers[SYSCONFIG2] &
- SYSCONFIG2_VOLUME;
- break;
- case V4L2_CID_AUDIO_MUTE:
- ctrl->value = ((radio->registers[POWERCFG] &
- POWERCFG_DMUTE) == 0) ? 1 : 0;
- break;
- default:
- retval = -EINVAL;
- }
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": get control failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_s_ctrl - set the value of a control
- */
-static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
- struct v4l2_control *ctrl)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = 0;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
-
- switch (ctrl->id) {
- case V4L2_CID_AUDIO_VOLUME:
- radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
- radio->registers[SYSCONFIG2] |= ctrl->value;
- retval = si470x_set_register(radio, SYSCONFIG2);
- break;
- case V4L2_CID_AUDIO_MUTE:
- if (ctrl->value == 1)
- radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
- else
- radio->registers[POWERCFG] |= POWERCFG_DMUTE;
- retval = si470x_set_register(radio, POWERCFG);
- break;
- default:
- retval = -EINVAL;
- }
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": set control failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_g_audio - get audio attributes
- */
-static int si470x_vidioc_g_audio(struct file *file, void *priv,
- struct v4l2_audio *audio)
-{
- /* driver constants */
- audio->index = 0;
- strcpy(audio->name, "Radio");
- audio->capability = V4L2_AUDCAP_STEREO;
- audio->mode = 0;
-
- return 0;
-}
-
-
-/*
- * si470x_vidioc_g_tuner - get tuner attributes
- */
-static int si470x_vidioc_g_tuner(struct file *file, void *priv,
- struct v4l2_tuner *tuner)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = 0;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
- if (tuner->index != 0) {
- retval = -EINVAL;
- goto done;
- }
-
- retval = si470x_get_register(radio, STATUSRSSI);
- if (retval < 0)
- goto done;
-
- /* driver constants */
- strcpy(tuner->name, "FM");
- tuner->type = V4L2_TUNER_RADIO;
- tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
- V4L2_TUNER_CAP_RDS;
-
- /* range limits */
- switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
- /* 0: 87.5 - 108 MHz (USA, Europe, default) */
- default:
- tuner->rangelow = 87.5 * FREQ_MUL;
- tuner->rangehigh = 108 * FREQ_MUL;
- break;
- /* 1: 76 - 108 MHz (Japan wide band) */
- case 1 :
- tuner->rangelow = 76 * FREQ_MUL;
- tuner->rangehigh = 108 * FREQ_MUL;
- break;
- /* 2: 76 - 90 MHz (Japan) */
- case 2 :
- tuner->rangelow = 76 * FREQ_MUL;
- tuner->rangehigh = 90 * FREQ_MUL;
- break;
- };
-
- /* stereo indicator == stereo (instead of mono) */
- if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
- tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
- else
- tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
- /* If there is a reliable method of detecting an RDS channel,
- then this code should check for that before setting this
- RDS subchannel. */
- tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
-
- /* mono/stereo selector */
- if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
- tuner->audmode = V4L2_TUNER_MODE_STEREO;
- else
- tuner->audmode = V4L2_TUNER_MODE_MONO;
-
- /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
- /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */
- tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
- /* the ideal factor is 0xffff/75 = 873,8 */
- tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
-
- /* automatic frequency control: -1: freq to low, 1 freq to high */
- /* AFCRL does only indicate that freq. differs, not if too low/high */
- tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": get tuner failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_s_tuner - set tuner attributes
- */
-static int si470x_vidioc_s_tuner(struct file *file, void *priv,
- struct v4l2_tuner *tuner)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = -EINVAL;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
- if (tuner->index != 0)
- goto done;
-
- /* mono/stereo selector */
- switch (tuner->audmode) {
- case V4L2_TUNER_MODE_MONO:
- radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
- break;
- case V4L2_TUNER_MODE_STEREO:
- radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
- break;
- default:
- goto done;
- }
-
- retval = si470x_set_register(radio, POWERCFG);
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": set tuner failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
- */
-static int si470x_vidioc_g_frequency(struct file *file, void *priv,
- struct v4l2_frequency *freq)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = 0;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
- if (freq->tuner != 0) {
- retval = -EINVAL;
- goto done;
- }
-
- freq->type = V4L2_TUNER_RADIO;
- retval = si470x_get_freq(radio, &freq->frequency);
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": get frequency failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
- */
-static int si470x_vidioc_s_frequency(struct file *file, void *priv,
- struct v4l2_frequency *freq)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = 0;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
- if (freq->tuner != 0) {
- retval = -EINVAL;
- goto done;
- }
-
- retval = si470x_set_freq(radio, freq->frequency);
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": set frequency failed with %d\n", retval);
- return retval;
-}
-
-
-/*
- * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
- */
-static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
- struct v4l2_hw_freq_seek *seek)
-{
- struct si470x_device *radio = video_drvdata(file);
- int retval = 0;
-
- /* safety checks */
- if (radio->disconnected) {
- retval = -EIO;
- goto done;
- }
- if (seek->tuner != 0) {
- retval = -EINVAL;
- goto done;
- }
-
- retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
-
-done:
- if (retval < 0)
- printk(KERN_WARNING DRIVER_NAME
- ": set hardware frequency seek failed with %d\n",
- retval);
- return retval;
-}
-
-
-/*
- * si470x_ioctl_ops - video device ioctl operations
- */
-static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
- .vidioc_querycap = si470x_vidioc_querycap,
- .vidioc_queryctrl = si470x_vidioc_queryctrl,
- .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
- .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
- .vidioc_g_audio = si470x_vidioc_g_audio,
- .vidioc_g_tuner = si470x_vidioc_g_tuner,
- .vidioc_s_tuner = si470x_vidioc_s_tuner,
- .vidioc_g_frequency = si470x_vidioc_g_frequency,
- .vidioc_s_frequency = si470x_vidioc_s_frequency,
- .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
-};
-
-
-/*
- * si470x_viddev_template - video device interface
- */
-static struct video_device si470x_viddev_template = {
- .fops = &si470x_fops,
- .name = DRIVER_NAME,
- .release = video_device_release,
- .ioctl_ops = &si470x_ioctl_ops,
-};
-
-
-
-/**************************************************************************
- * USB Interface
- **************************************************************************/
-
-/*
- * 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);
--- /dev/null
+config USB_SI470X
+ tristate "Silicon Labs Si470x FM Radio Receiver support with USB"
+ depends on USB && RADIO_SI470X
+ ---help---
+ This is a driver for USB devices with the Silicon Labs SI470x
+ chip. Currently these devices are known to work:
+ - 10c4:818a: Silicon Labs USB FM Radio Reference Design
+ - 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music)
+ - 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700)
+ - 10c5:819a: Sanei Electric FM USB Radio (aka DealExtreme.com PCear)
+
+ Sound is provided by the ALSA USB Audio/MIDI driver. Therefore
+ if you don't want to use the device solely for RDS receiving,
+ it is recommended to also select SND_USB_AUDIO.
+
+ Please have a look at the documentation, especially on how
+ to redirect the audio stream from the radio to your sound device:
+ Documentation/video4linux/si470x.txt
+
+ Say Y here if you want to connect this type of radio to your
+ computer's USB port.
+
+ To compile this driver as a module, choose M here: the
+ module will be called radio-usb-si470x.
--- /dev/null
+#
+# Makefile for radios with Silicon Labs Si470x FM Radio Receivers
+#
+
+radio-usb-si470x-objs := radio-si470x-usb.o radio-si470x-common.o
+
+obj-$(CONFIG_USB_SI470X) += radio-usb-si470x.o
--- /dev/null
+/*
+ * drivers/media/radio/si470x/radio-si470x-common.c
+ *
+ * Driver for radios with Silicon Labs Si470x FM Radio Receivers
+ *
+ * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+/*
+ * History:
+ * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.0
+ * - First working version
+ * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.1
+ * - Improved error handling, every function now returns errno
+ * - Improved multi user access (start/mute/stop)
+ * - Channel doesn't get lost anymore after start/mute/stop
+ * - RDS support added (polling mode via interrupt EP 1)
+ * - marked default module parameters with *value*
+ * - switched from bit structs to bit masks
+ * - header file cleaned and integrated
+ * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.2
+ * - hex values are now lower case
+ * - commented USB ID for ADS/Tech moved on todo list
+ * - blacklisted si470x in hid-quirks.c
+ * - rds buffer handling functions integrated into *_work, *_read
+ * - rds_command in si470x_poll exchanged against simple retval
+ * - check for firmware version 15
+ * - code order and prototypes still remain the same
+ * - spacing and bottom of band codes remain the same
+ * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.3
+ * - code reordered to avoid function prototypes
+ * - switch/case defaults are now more user-friendly
+ * - unified comment style
+ * - applied all checkpatch.pl v1.12 suggestions
+ * except the warning about the too long lines with bit comments
+ * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
+ * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.4
+ * - avoid poss. locking when doing copy_to_user which may sleep
+ * - RDS is automatically activated on read now
+ * - code cleaned of unnecessary rds_commands
+ * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
+ * (thanks to Guillaume RAMOUSSE)
+ * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.5
+ * - number of seek_retries changed to tune_timeout
+ * - fixed problem with incomplete tune operations by own buffers
+ * - optimization of variables and printf types
+ * - improved error logging
+ * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Oliver Neukum <oliver@neukum.org>
+ * Version 1.0.6
+ * - fixed coverity checker warnings in *_usb_driver_disconnect
+ * - probe()/open() race by correct ordering in probe()
+ * - DMA coherency rules by separate allocation of all buffers
+ * - use of endianness macros
+ * - abuse of spinlock, replaced by mutex
+ * - racy handling of timer in disconnect,
+ * replaced by delayed_work
+ * - racy interruptible_sleep_on(),
+ * replaced with wait_event_interruptible()
+ * - handle signals in read()
+ * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Oliver Neukum <oliver@neukum.org>
+ * Version 1.0.7
+ * - usb autosuspend support
+ * - unplugging fixed
+ * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.8
+ * - hardware frequency seek support
+ * - afc indication
+ * - more safety checks, let si470x_get_freq return errno
+ * - vidioc behavior corrected according to v4l2 spec
+ * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
+ * - add support for KWorld USB FM Radio FM700
+ * - blacklisted KWorld radio in hid-core.c and hid-ids.h
+ * 2008-12-03 Mark Lord <mlord@pobox.com>
+ * - add support for DealExtreme USB Radio
+ * 2009-01-31 Bob Ross <pigiron@gmx.com>
+ * - correction of stereo detection/setting
+ * - correction of signal strength indicator scaling
+ * 2009-01-31 Rick Bronson <rick@efn.org>
+ * Tobias Lorenz <tobias.lorenz@gmx.net>
+ * - add LED status output
+ * - get HW/SW version from scratchpad
+ * 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
+ * Version 1.0.10
+ * - add support for interrupt mode for RDS endpoint,
+ * instead of polling.
+ * Improves RDS reception significantly
+ */
+
+
+/* kernel includes */
+#include "radio-si470x.h"
+
+
+
+/**************************************************************************
+ * Module Parameters
+ **************************************************************************/
+
+/* Spacing (kHz) */
+/* 0: 200 kHz (USA, Australia) */
+/* 1: 100 kHz (Europe, Japan) */
+/* 2: 50 kHz */
+static unsigned short space = 2;
+module_param(space, ushort, 0444);
+MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
+
+/* Bottom of Band (MHz) */
+/* 0: 87.5 - 108 MHz (USA, Europe)*/
+/* 1: 76 - 108 MHz (Japan wide band) */
+/* 2: 76 - 90 MHz (Japan) */
+static unsigned short band = 1;
+module_param(band, ushort, 0444);
+MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
+
+/* De-emphasis */
+/* 0: 75 us (USA) */
+/* 1: 50 us (Europe, Australia, Japan) */
+static unsigned short de = 1;
+module_param(de, ushort, 0444);
+MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
+
+/* Tune timeout */
+static unsigned int tune_timeout = 3000;
+module_param(tune_timeout, uint, 0644);
+MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
+
+/* Seek timeout */
+static unsigned int seek_timeout = 5000;
+module_param(seek_timeout, uint, 0644);
+MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
+
+
+
+/**************************************************************************
+ * Generic Functions
+ **************************************************************************/
+
+/*
+ * si470x_set_chan - set the channel
+ */
+static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
+{
+ int retval;
+ unsigned long timeout;
+ bool timed_out = 0;
+
+ /* start tuning */
+ radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
+ radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
+ retval = si470x_set_register(radio, CHANNEL);
+ if (retval < 0)
+ goto done;
+
+ /* wait till tune operation has completed */
+ timeout = jiffies + msecs_to_jiffies(tune_timeout);
+ do {
+ retval = si470x_get_register(radio, STATUSRSSI);
+ if (retval < 0)
+ goto stop;
+ timed_out = time_after(jiffies, timeout);
+ } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
+ (!timed_out));
+ if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
+ printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n");
+ if (timed_out)
+ printk(KERN_WARNING DRIVER_NAME
+ ": tune timed out after %u ms\n", tune_timeout);
+
+stop:
+ /* stop tuning */
+ radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
+ retval = si470x_set_register(radio, CHANNEL);
+
+done:
+ return retval;
+}
+
+
+/*
+ * si470x_get_freq - get the frequency
+ */
+static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
+{
+ unsigned int spacing, band_bottom;
+ unsigned short chan;
+ int retval;
+
+ /* Spacing (kHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
+ /* 0: 200 kHz (USA, Australia) */
+ case 0:
+ spacing = 0.200 * FREQ_MUL; break;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1:
+ spacing = 0.100 * FREQ_MUL; break;
+ /* 2: 50 kHz */
+ default:
+ spacing = 0.050 * FREQ_MUL; break;
+ };
+
+ /* Bottom of Band (MHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
+ /* 0: 87.5 - 108 MHz (USA, Europe) */
+ case 0:
+ band_bottom = 87.5 * FREQ_MUL; break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ default:
+ band_bottom = 76 * FREQ_MUL; break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2:
+ band_bottom = 76 * FREQ_MUL; break;
+ };
+
+ /* read channel */
+ retval = si470x_get_register(radio, READCHAN);
+ chan = radio->registers[READCHAN] & READCHAN_READCHAN;
+
+ /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
+ *freq = chan * spacing + band_bottom;
+
+ return retval;
+}
+
+
+/*
+ * si470x_set_freq - set the frequency
+ */
+int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
+{
+ unsigned int spacing, band_bottom;
+ unsigned short chan;
+
+ /* Spacing (kHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
+ /* 0: 200 kHz (USA, Australia) */
+ case 0:
+ spacing = 0.200 * FREQ_MUL; break;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1:
+ spacing = 0.100 * FREQ_MUL; break;
+ /* 2: 50 kHz */
+ default:
+ spacing = 0.050 * FREQ_MUL; break;
+ };
+
+ /* Bottom of Band (MHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
+ /* 0: 87.5 - 108 MHz (USA, Europe) */
+ case 0:
+ band_bottom = 87.5 * FREQ_MUL; break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ default:
+ band_bottom = 76 * FREQ_MUL; break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2:
+ band_bottom = 76 * FREQ_MUL; break;
+ };
+
+ /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
+ chan = (freq - band_bottom) / spacing;
+
+ return si470x_set_chan(radio, chan);
+}
+
+
+/*
+ * si470x_set_seek - set seek
+ */
+static int si470x_set_seek(struct si470x_device *radio,
+ unsigned int wrap_around, unsigned int seek_upward)
+{
+ int retval = 0;
+ unsigned long timeout;
+ bool timed_out = 0;
+
+ /* start seeking */
+ radio->registers[POWERCFG] |= POWERCFG_SEEK;
+ if (wrap_around == 1)
+ radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
+ else
+ radio->registers[POWERCFG] |= POWERCFG_SKMODE;
+ if (seek_upward == 1)
+ radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
+ else
+ radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
+ retval = si470x_set_register(radio, POWERCFG);
+ if (retval < 0)
+ goto done;
+
+ /* wait till seek operation has completed */
+ timeout = jiffies + msecs_to_jiffies(seek_timeout);
+ do {
+ retval = si470x_get_register(radio, STATUSRSSI);
+ if (retval < 0)
+ goto stop;
+ timed_out = time_after(jiffies, timeout);
+ } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
+ (!timed_out));
+ if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
+ printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n");
+ if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
+ printk(KERN_WARNING DRIVER_NAME
+ ": seek failed / band limit reached\n");
+ if (timed_out)
+ printk(KERN_WARNING DRIVER_NAME
+ ": seek timed out after %u ms\n", seek_timeout);
+
+stop:
+ /* stop seeking */
+ radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
+ retval = si470x_set_register(radio, POWERCFG);
+
+done:
+ /* try again, if timed out */
+ if ((retval == 0) && timed_out)
+ retval = -EAGAIN;
+
+ return retval;
+}
+
+
+/*
+ * si470x_start - switch on radio
+ */
+int si470x_start(struct si470x_device *radio)
+{
+ int retval;
+
+ /* powercfg */
+ radio->registers[POWERCFG] =
+ POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
+ retval = si470x_set_register(radio, POWERCFG);
+ if (retval < 0)
+ goto done;
+
+ /* sysconfig 1 */
+ radio->registers[SYSCONFIG1] = SYSCONFIG1_DE;
+ retval = si470x_set_register(radio, SYSCONFIG1);
+ if (retval < 0)
+ goto done;
+
+ /* sysconfig 2 */
+ radio->registers[SYSCONFIG2] =
+ (0x3f << 8) | /* SEEKTH */
+ ((band << 6) & SYSCONFIG2_BAND) | /* BAND */
+ ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
+ 15; /* VOLUME (max) */
+ retval = si470x_set_register(radio, SYSCONFIG2);
+ if (retval < 0)
+ goto done;
+
+ /* reset last channel */
+ retval = si470x_set_chan(radio,
+ radio->registers[CHANNEL] & CHANNEL_CHAN);
+
+done:
+ return retval;
+}
+
+
+/*
+ * si470x_stop - switch off radio
+ */
+int si470x_stop(struct si470x_device *radio)
+{
+ int retval;
+
+ /* sysconfig 1 */
+ radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
+ retval = si470x_set_register(radio, SYSCONFIG1);
+ if (retval < 0)
+ goto done;
+
+ /* powercfg */
+ radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
+ /* POWERCFG_ENABLE has to automatically go low */
+ radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
+ retval = si470x_set_register(radio, POWERCFG);
+
+done:
+ return retval;
+}
+
+
+/*
+ * si470x_rds_on - switch on rds reception
+ */
+int si470x_rds_on(struct si470x_device *radio)
+{
+ int retval;
+
+ /* sysconfig 1 */
+ mutex_lock(&radio->lock);
+ radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
+ retval = si470x_set_register(radio, SYSCONFIG1);
+ if (retval < 0)
+ radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
+ mutex_unlock(&radio->lock);
+
+ return retval;
+}
+
+
+
+/**************************************************************************
+ * Video4Linux Interface
+ **************************************************************************/
+
+/*
+ * si470x_vidioc_queryctrl - enumerate control items
+ */
+static int si470x_vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ int retval = -EINVAL;
+
+ /* abort if qc->id is below V4L2_CID_BASE */
+ if (qc->id < V4L2_CID_BASE)
+ goto done;
+
+ /* search video control */
+ switch (qc->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
+ case V4L2_CID_AUDIO_MUTE:
+ return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+ }
+
+ /* disable unsupported base controls */
+ /* to satisfy kradio and such apps */
+ if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
+ qc->flags = V4L2_CTRL_FLAG_DISABLED;
+ retval = 0;
+ }
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": query controls failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_g_ctrl - get the value of a control
+ */
+static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ ctrl->value = radio->registers[SYSCONFIG2] &
+ SYSCONFIG2_VOLUME;
+ break;
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = ((radio->registers[POWERCFG] &
+ POWERCFG_DMUTE) == 0) ? 1 : 0;
+ break;
+ default:
+ retval = -EINVAL;
+ }
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": get control failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_s_ctrl - set the value of a control
+ */
+static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
+ radio->registers[SYSCONFIG2] |= ctrl->value;
+ retval = si470x_set_register(radio, SYSCONFIG2);
+ break;
+ case V4L2_CID_AUDIO_MUTE:
+ if (ctrl->value == 1)
+ radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
+ else
+ radio->registers[POWERCFG] |= POWERCFG_DMUTE;
+ retval = si470x_set_register(radio, POWERCFG);
+ break;
+ default:
+ retval = -EINVAL;
+ }
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set control failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_g_audio - get audio attributes
+ */
+static int si470x_vidioc_g_audio(struct file *file, void *priv,
+ struct v4l2_audio *audio)
+{
+ /* driver constants */
+ audio->index = 0;
+ strcpy(audio->name, "Radio");
+ audio->capability = V4L2_AUDCAP_STEREO;
+ audio->mode = 0;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_g_tuner - get tuner attributes
+ */
+static int si470x_vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+ if (tuner->index != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ retval = si470x_get_register(radio, STATUSRSSI);
+ if (retval < 0)
+ goto done;
+
+ /* driver constants */
+ strcpy(tuner->name, "FM");
+ tuner->type = V4L2_TUNER_RADIO;
+ tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
+ V4L2_TUNER_CAP_RDS;
+
+ /* range limits */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
+ /* 0: 87.5 - 108 MHz (USA, Europe, default) */
+ default:
+ tuner->rangelow = 87.5 * FREQ_MUL;
+ tuner->rangehigh = 108 * FREQ_MUL;
+ break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ case 1:
+ tuner->rangelow = 76 * FREQ_MUL;
+ tuner->rangehigh = 108 * FREQ_MUL;
+ break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2:
+ tuner->rangelow = 76 * FREQ_MUL;
+ tuner->rangehigh = 90 * FREQ_MUL;
+ break;
+ };
+
+ /* stereo indicator == stereo (instead of mono) */
+ if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
+ tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
+ else
+ tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ /* If there is a reliable method of detecting an RDS channel,
+ then this code should check for that before setting this
+ RDS subchannel. */
+ tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
+
+ /* mono/stereo selector */
+ if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
+ tuner->audmode = V4L2_TUNER_MODE_STEREO;
+ else
+ tuner->audmode = V4L2_TUNER_MODE_MONO;
+
+ /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
+ /* measured in units of db쨉V in 1 db increments (max at ~75 db쨉V) */
+ tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
+ /* the ideal factor is 0xffff/75 = 873,8 */
+ tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
+
+ /* automatic frequency control: -1: freq to low, 1 freq to high */
+ /* AFCRL does only indicate that freq. differs, not if too low/high */
+ tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": get tuner failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_s_tuner - set tuner attributes
+ */
+static int si470x_vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = -EINVAL;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+ if (tuner->index != 0)
+ goto done;
+
+ /* mono/stereo selector */
+ switch (tuner->audmode) {
+ case V4L2_TUNER_MODE_MONO:
+ radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
+ break;
+ case V4L2_TUNER_MODE_STEREO:
+ radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
+ break;
+ default:
+ goto done;
+ }
+
+ retval = si470x_set_register(radio, POWERCFG);
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set tuner failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
+ */
+static int si470x_vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+ if (freq->tuner != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ freq->type = V4L2_TUNER_RADIO;
+ retval = si470x_get_freq(radio, &freq->frequency);
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": get frequency failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
+ */
+static int si470x_vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+ if (freq->tuner != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ retval = si470x_set_freq(radio, freq->frequency);
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set frequency failed with %d\n", retval);
+ return retval;
+}
+
+
+/*
+ * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
+ */
+static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
+ struct v4l2_hw_freq_seek *seek)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* safety checks */
+ if (radio->disconnected) {
+ retval = -EIO;
+ goto done;
+ }
+ if (seek->tuner != 0) {
+ retval = -EINVAL;
+ goto done;
+ }
+
+ retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
+
+done:
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set hardware frequency seek failed with %d\n",
+ retval);
+ return retval;
+}
+
+
+/*
+ * si470x_ioctl_ops - video device ioctl operations
+ */
+static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
+ .vidioc_querycap = si470x_vidioc_querycap,
+ .vidioc_queryctrl = si470x_vidioc_queryctrl,
+ .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
+ .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
+ .vidioc_g_audio = si470x_vidioc_g_audio,
+ .vidioc_g_tuner = si470x_vidioc_g_tuner,
+ .vidioc_s_tuner = si470x_vidioc_s_tuner,
+ .vidioc_g_frequency = si470x_vidioc_g_frequency,
+ .vidioc_s_frequency = si470x_vidioc_s_frequency,
+ .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
+};
+
+
+/*
+ * si470x_viddev_template - video device interface
+ */
+struct video_device si470x_viddev_template = {
+ .fops = &si470x_fops,
+ .name = DRIVER_NAME,
+ .release = video_device_release,
+ .ioctl_ops = &si470x_ioctl_ops,
+};
--- /dev/null
+/*
+ * 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);
--- /dev/null
+/*
+ * 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);
git.openpandora.org / pandora-kernel.git / commitdiff