V4L/DVB (7061): radio-si470x: Some cleanups
- 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) Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Tobias Lorenz
Mauro Carvalho Chehab
parent
ed086314f4
commit
8bf5e5ca39
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@ -5,7 +5,7 @@
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* - Silicon Labs USB FM Radio Reference Design
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* - ADS/Tech FM Radio Receiver (formerly Instant FM Music) (RDX-155-EF)
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*
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* Copyright (c) 2007 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Copyright (c) 2008 Tobias Lorenz <tobias.lorenz@gmx.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -47,6 +47,14 @@
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* - check for firmware version 15
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* - code order and prototypes still remain the same
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* - spacing and bottom of band codes remain the same
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* 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.3
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* - code reordered to avoid function prototypes
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* - switch/case defaults are now more user-friendly
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* - unified comment style
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* - applied all checkpatch.pl v1.12 suggestions
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* except the warning about the too long lines with bit comments
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* - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
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*
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* ToDo:
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* - check USB Vendor/Product ID for ADS/Tech FM Radio Receiver
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@ -55,13 +63,14 @@
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* - add firmware download/update support
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* - add possibility to switch off RDS
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* - RDS support: interrupt mode, instead of polling
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* - add LED status output
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* - add LED status output (check if that's not already done in firmware)
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*/
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/* driver definitions */
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#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
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#define DRIVER_NAME "radio-si470x"
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#define DRIVER_VERSION KERNEL_VERSION(1, 0, 2)
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#define DRIVER_VERSION KERNEL_VERSION(1, 0, 3)
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#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
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#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
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@ -80,6 +89,21 @@
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#include <media/rds.h>
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/* USB Device ID List */
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static struct usb_device_id si470x_usb_driver_id_table[] = {
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/* Silicon Labs USB FM Radio Reference Design */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
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/* Terminating entry */
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{ }
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};
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MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table);
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/**************************************************************************
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* Module Parameters
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**************************************************************************/
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/* Radio Nr */
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static int radio_nr = -1;
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module_param(radio_nr, int, 0);
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@ -145,8 +169,8 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* Register Definitions
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**************************************************************************/
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#define FMRADIO_REGISTER_SIZE 2 /* 16 register bit width */
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#define FMRADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
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#define RADIO_REGISTER_SIZE 2 /* 16 register bit width */
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#define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
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#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
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#define DEVICEID 0 /* Device ID */
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@ -236,23 +260,23 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* USB HID reports
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* USB HID Reports
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**************************************************************************/
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/* Reports 1-16 give direct read/write access to the 16 Si470x registers */
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/* with the (REPORT_ID - 1) corresponding to the register address across USB */
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/* endpoint 0 using GET_REPORT and SET_REPORT */
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#define REGISTER_REPORT_SIZE (FMRADIO_REGISTER_SIZE + 1)
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#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1)
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#define REGISTER_REPORT(reg) ((reg) + 1)
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/* Report 17 gives direct read/write access to the entire Si470x register */
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/* map across endpoint 0 using GET_REPORT and SET_REPORT */
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#define ENTIRE_REPORT_SIZE (FMRADIO_REGISTER_NUM * FMRADIO_REGISTER_SIZE + 1)
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#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
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#define ENTIRE_REPORT 17
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/* Report 18 is used to send the lowest 6 Si470x registers up the HID */
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/* interrupt endpoint 1 to Windows every 20 milliseconds for status */
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#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * FMRADIO_REGISTER_SIZE + 1)
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#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1)
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#define RDS_REPORT 18
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/* Report 19: LED state */
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@ -281,12 +305,12 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* software/hardware versions
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* Software/Hardware Versions
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**************************************************************************/
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#define FMRADIO_SW_VERSION_NOT_BOOTLOADABLE 6
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#define FMRADIO_SW_VERSION 7
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#define FMRADIO_SW_VERSION_CURRENT 15
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#define FMRADIO_HW_VERSION 1
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#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6
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#define RADIO_SW_VERSION 7
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#define RADIO_SW_VERSION_CURRENT 15
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#define RADIO_HW_VERSION 1
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#define SCRATCH_PAGE_SW_VERSION 1
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#define SCRATCH_PAGE_HW_VERSION 2
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@ -294,7 +318,7 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* LED State definitions
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* LED State Definitions
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**************************************************************************/
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#define LED_COMMAND 0x35
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@ -310,7 +334,7 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* Stream State definitions
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* Stream State Definitions
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**************************************************************************/
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#define STREAM_COMMAND 0x36
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#define STREAM_VIDPID 0x00
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@ -319,16 +343,16 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* bootloader / flash commands
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* Bootloader / Flash Commands
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**************************************************************************/
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/* Unique ID sent to bootloader and required to put into a bootload state */
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/* unique id sent to bootloader and required to put into a bootload state */
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#define UNIQUE_BL_ID 0x34
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/* Mask for the flash data */
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/* mask for the flash data */
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#define FLASH_DATA_MASK 0x55
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/* Bootloader commands */
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/* bootloader commands */
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#define GET_SW_VERSION_COMMAND 0x00
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#define SET_PAGE_COMMAND 0x01
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#define ERASE_PAGE_COMMAND 0x02
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@ -339,12 +363,12 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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#define GET_HW_VERSION_COMMAND 0x07
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#define BLANK 0xff
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/* Bootloader command responses */
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/* bootloader command responses */
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#define COMMAND_OK 0x01
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#define COMMAND_FAILED 0x02
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#define COMMAND_PENDING 0x03
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/* Buffer sizes */
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/* buffer sizes */
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#define COMMAND_BUFFER_SIZE 4
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#define RESPONSE_BUFFER_SIZE 2
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#define FLASH_BUFFER_SIZE 64
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@ -353,10 +377,12 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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/**************************************************************************
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* Driver private definitions
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* General Driver Definitions
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**************************************************************************/
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/* private data */
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/*
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* si470x_device - private data
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*/
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struct si470x_device {
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/* reference to USB and video device */
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struct usb_device *usbdev;
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@ -369,12 +395,12 @@ struct si470x_device {
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unsigned char buf[64];
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/* Silabs internal registers (0..15) */
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unsigned short registers[FMRADIO_REGISTER_NUM];
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unsigned short registers[RADIO_REGISTER_NUM];
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/* RDS receive buffer */
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struct work_struct work;
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struct timer_list timer;
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spinlock_t lock;
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spinlock_t lock; /* buffer locking */
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unsigned char *buffer;
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unsigned int buf_size;
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unsigned int rd_index;
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@ -385,177 +411,20 @@ struct si470x_device {
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int data_available_for_read;
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};
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/* register acccess functions */
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static int si470x_get_report(struct si470x_device *radio, int size);
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static int si470x_set_report(struct si470x_device *radio, int size);
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static int si470x_get_register(struct si470x_device *radio, int regnr);
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static int si470x_set_register(struct si470x_device *radio, int regnr);
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static int si470x_get_all_registers(struct si470x_device *radio);
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static int si470x_get_rds_registers(struct si470x_device *radio);
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/* high-level functions */
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static int si470x_start(struct si470x_device *radio);
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static int si470x_stop(struct si470x_device *radio);
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static int si470x_set_chan(struct si470x_device *radio, int chan);
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static int si470x_get_freq(struct si470x_device *radio);
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static int si470x_set_freq(struct si470x_device *radio, int freq);
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/* RDS functions */
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static void si470x_rds(struct si470x_device *radio);
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static void si470x_timer(unsigned long data);
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static void si470x_work(struct work_struct *work);
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/**************************************************************************
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* USB interface definitions
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**************************************************************************/
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/* USB device ID list (Vendor, Product, Class, SubClass, Protocol) */
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static struct usb_device_id si470x_usb_driver_id_table[] = {
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/* Silicon Labs USB FM Radio Reference Design */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) },
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/* Terminating entry */
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{ }
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};
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MODULE_DEVICE_TABLE (usb, si470x_usb_driver_id_table);
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/* USB driver functions */
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static int si470x_usb_driver_probe(struct usb_interface *intf,
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const struct usb_device_id *id);
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static void si470x_usb_driver_disconnect(struct usb_interface *intf);
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/* USB driver interface */
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static struct usb_driver si470x_usb_driver = {
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.name = DRIVER_NAME,
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.probe = si470x_usb_driver_probe,
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.disconnect = si470x_usb_driver_disconnect,
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.id_table = si470x_usb_driver_id_table,
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};
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/**************************************************************************
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* Video4Linux interface definitions
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**************************************************************************/
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/* The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW, */
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/* 62.5 kHz otherwise. */
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/* The tuner is able to have a channel spacing of 50, 100 or 200 kHz. */
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/* tuner->capability is therefore set to V4L2_TUNER_CAP_LOW */
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/* The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000 */
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/*
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* The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW,
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* 62.5 kHz otherwise.
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* The tuner is able to have a channel spacing of 50, 100 or 200 kHz.
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* tuner->capability is therefore set to V4L2_TUNER_CAP_LOW
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* The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000
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*/
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#define FREQ_MUL (1000000 / 62.5)
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/* File operations functions */
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static ssize_t si470x_fops_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos);
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static unsigned int si470x_fops_poll(struct file *file,
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struct poll_table_struct *pts);
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static int si470x_fops_open(struct inode *inode, struct file *file);
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static int si470x_fops_release(struct inode *inode, struct file *file);
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/* File operations interface */
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static const struct file_operations si470x_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.read = si470x_fops_read,
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.poll = si470x_fops_poll,
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.ioctl = video_ioctl2,
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.compat_ioctl = v4l_compat_ioctl32,
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.open = si470x_fops_open,
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.release = si470x_fops_release,
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};
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/* Video device functions */
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static int si470x_vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *capability);
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static int si470x_vidioc_g_input(struct file *file, void *priv,
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unsigned int *i);
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static int si470x_vidioc_s_input(struct file *file, void *priv,
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unsigned int i);
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static int si470x_vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc);
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static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl);
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static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl);
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static int si470x_vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *audio);
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static int si470x_vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *audio);
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static int si470x_vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *tuner);
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static int si470x_vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *tuner);
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static int si470x_vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *freq);
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static int si470x_vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *freq);
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/* Video device interface */
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static struct video_device si470x_viddev_template = {
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.fops = &si470x_fops,
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.name = DRIVER_NAME,
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.type = VID_TYPE_TUNER,
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.release = video_device_release,
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.vidioc_querycap = si470x_vidioc_querycap,
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.vidioc_g_input = si470x_vidioc_g_input,
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.vidioc_s_input = si470x_vidioc_s_input,
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.vidioc_queryctrl = si470x_vidioc_queryctrl,
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.vidioc_g_ctrl = si470x_vidioc_g_ctrl,
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.vidioc_s_ctrl = si470x_vidioc_s_ctrl,
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.vidioc_g_audio = si470x_vidioc_g_audio,
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.vidioc_s_audio = si470x_vidioc_s_audio,
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.vidioc_g_tuner = si470x_vidioc_g_tuner,
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.vidioc_s_tuner = si470x_vidioc_s_tuner,
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.vidioc_g_frequency = si470x_vidioc_g_frequency,
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.vidioc_s_frequency = si470x_vidioc_s_frequency,
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.owner = THIS_MODULE,
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};
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/* Query control */
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static struct v4l2_queryctrl radio_queryctrl[] = {
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/* HINT: the disabled controls are only here to satify kradio and such apps */
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{
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.id = V4L2_CID_AUDIO_VOLUME,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Volume",
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.minimum = 0,
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.maximum = 15,
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.step = 1,
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.default_value = 15,
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},
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{
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.id = V4L2_CID_AUDIO_BALANCE,
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.flags = V4L2_CTRL_FLAG_DISABLED,
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},
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{
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.id = V4L2_CID_AUDIO_BASS,
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.flags = V4L2_CTRL_FLAG_DISABLED,
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},
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{
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.id = V4L2_CID_AUDIO_TREBLE,
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.flags = V4L2_CTRL_FLAG_DISABLED,
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},
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{
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.id = V4L2_CID_AUDIO_MUTE,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Mute",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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},
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{
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.id = V4L2_CID_AUDIO_LOUDNESS,
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.flags = V4L2_CTRL_FLAG_DISABLED,
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},
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};
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/**************************************************************************
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* Driver private functions
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* General Driver Functions
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**************************************************************************/
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/*
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@ -633,10 +502,10 @@ static int si470x_get_all_registers(struct si470x_device *radio)
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retval = si470x_get_report(radio, ENTIRE_REPORT_SIZE);
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if (retval >= 0)
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for (regnr = 0; regnr < FMRADIO_REGISTER_NUM; regnr++)
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for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
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radio->registers[regnr] =
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(radio->buf[regnr * FMRADIO_REGISTER_SIZE + 1] << 8) |
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radio->buf[regnr * FMRADIO_REGISTER_SIZE + 2];
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(radio->buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
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radio->buf[regnr * RADIO_REGISTER_SIZE + 2];
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return (retval < 0) ? -EINVAL : 0;
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}
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@ -657,15 +526,120 @@ static int si470x_get_rds_registers(struct si470x_device *radio)
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usb_rcvctrlpipe(radio->usbdev, 1),
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radio->buf, RDS_REPORT_SIZE, &size, usb_timeout);
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if (retval >= 0) {
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for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++) {
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||||
if (retval >= 0)
|
||||
for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
|
||||
radio->registers[STATUSRSSI + regnr] =
|
||||
(radio->buf[regnr * FMRADIO_REGISTER_SIZE + 1] << 8) |
|
||||
radio->buf[regnr * FMRADIO_REGISTER_SIZE + 2];
|
||||
}
|
||||
}
|
||||
(radio->buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
|
||||
radio->buf[regnr * RADIO_REGISTER_SIZE + 2];
|
||||
|
||||
return (retval < 0) ? - EINVAL : 0;
|
||||
return (retval < 0) ? -EINVAL : 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_set_chan - set the channel
|
||||
*/
|
||||
static int si470x_set_chan(struct si470x_device *radio, int chan)
|
||||
{
|
||||
int retval, i;
|
||||
|
||||
/* start tuning */
|
||||
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
|
||||
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
|
||||
retval = si470x_set_register(radio, CHANNEL);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
/* wait till seek operation has completed */
|
||||
i = 0;
|
||||
do {
|
||||
retval = si470x_get_register(radio, STATUSRSSI);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
} while ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) &&
|
||||
(++i < seek_retries));
|
||||
if (i >= seek_retries)
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": seek does not finish after %d tries\n", i);
|
||||
|
||||
/* stop tuning */
|
||||
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
|
||||
return si470x_set_register(radio, CHANNEL);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_get_freq - get the frequency
|
||||
*/
|
||||
static int si470x_get_freq(struct si470x_device *radio)
|
||||
{
|
||||
int spacing, band_bottom, chan, freq;
|
||||
int retval;
|
||||
|
||||
/* Spacing (kHz) */
|
||||
switch (space) {
|
||||
/* 0: 200 kHz (USA, Australia) */
|
||||
case 0 : spacing = 0.200 * FREQ_MUL; break;
|
||||
/* 1: 100 kHz (Europe, Japan) */
|
||||
case 1 : spacing = 0.100 * FREQ_MUL; break;
|
||||
/* 2: 50 kHz */
|
||||
default: spacing = 0.050 * FREQ_MUL; break;
|
||||
};
|
||||
|
||||
/* Bottom of Band (MHz) */
|
||||
switch (band) {
|
||||
/* 0: 87.5 - 108 MHz (USA, Europe) */
|
||||
case 0 : band_bottom = 87.5 * FREQ_MUL; break;
|
||||
/* 1: 76 - 108 MHz (Japan wide band) */
|
||||
default: band_bottom = 76 * FREQ_MUL; break;
|
||||
/* 2: 76 - 90 MHz (Japan) */
|
||||
case 2 : band_bottom = 76 * FREQ_MUL; break;
|
||||
};
|
||||
|
||||
/* read channel */
|
||||
retval = si470x_get_register(radio, READCHAN);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
chan = radio->registers[READCHAN] & READCHAN_READCHAN;
|
||||
|
||||
/* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
|
||||
freq = chan * spacing + band_bottom;
|
||||
|
||||
return freq;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_set_freq - set the frequency
|
||||
*/
|
||||
static int si470x_set_freq(struct si470x_device *radio, int freq)
|
||||
{
|
||||
int spacing, band_bottom, chan;
|
||||
|
||||
/* Spacing (kHz) */
|
||||
switch (space) {
|
||||
/* 0: 200 kHz (USA, Australia) */
|
||||
case 0 : spacing = 0.200 * FREQ_MUL; break;
|
||||
/* 1: 100 kHz (Europe, Japan) */
|
||||
case 1 : spacing = 0.100 * FREQ_MUL; break;
|
||||
/* 2: 50 kHz */
|
||||
default: spacing = 0.050 * FREQ_MUL; break;
|
||||
};
|
||||
|
||||
/* Bottom of Band (MHz) */
|
||||
switch (band) {
|
||||
/* 0: 87.5 - 108 MHz (USA, Europe) */
|
||||
case 0 : band_bottom = 87.5 * FREQ_MUL; break;
|
||||
/* 1: 76 - 108 MHz (Japan wide band) */
|
||||
default: band_bottom = 76 * FREQ_MUL; break;
|
||||
/* 2: 76 - 90 MHz (Japan) */
|
||||
case 2 : band_bottom = 76 * FREQ_MUL; break;
|
||||
};
|
||||
|
||||
/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
|
||||
chan = (freq - band_bottom) / spacing;
|
||||
|
||||
return si470x_set_chan(radio, chan);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -719,113 +693,10 @@ static int si470x_stop(struct si470x_device *radio)
|
|||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_set_chan - set the channel
|
||||
*/
|
||||
static int si470x_set_chan(struct si470x_device *radio, int chan)
|
||||
{
|
||||
int retval, i;
|
||||
|
||||
/* start tuning */
|
||||
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
|
||||
radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
|
||||
retval = si470x_set_register(radio, CHANNEL);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
/* wait till seek operation has completed */
|
||||
i = 0;
|
||||
do {
|
||||
retval = si470x_get_register(radio, STATUSRSSI);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
} while ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) &&
|
||||
(++i < seek_retries));
|
||||
if (i >= seek_retries)
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": seek does not finish after %d tries\n", i);
|
||||
|
||||
/* stop tuning */
|
||||
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
|
||||
return si470x_set_register(radio, CHANNEL);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_get_freq - get the frequency
|
||||
*/
|
||||
static int si470x_get_freq(struct si470x_device *radio)
|
||||
{
|
||||
int spacing, band_bottom, chan, freq;
|
||||
int retval;
|
||||
|
||||
/* Spacing (kHz) */
|
||||
switch (space) {
|
||||
/* 0: 200 kHz (USA, Australia) */
|
||||
default: spacing = 0.200 * FREQ_MUL; break;
|
||||
/* 1: 100 kHz (Europe, Japan) */
|
||||
case 1 : spacing = 0.100 * FREQ_MUL; break;
|
||||
/* 2: 50 kHz */
|
||||
case 2 : spacing = 0.050 * FREQ_MUL; break;
|
||||
};
|
||||
|
||||
/* Bottom of Band (MHz) */
|
||||
switch (band) {
|
||||
/* 0: 87.5 - 108 MHz (USA, Europe) */
|
||||
default: band_bottom = 87.5 * FREQ_MUL; break;
|
||||
/* 1: 76 - 108 MHz (Japan wide band) */
|
||||
case 1 : 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);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
chan = radio->registers[READCHAN] & READCHAN_READCHAN;
|
||||
|
||||
/* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
|
||||
freq = chan * spacing + band_bottom;
|
||||
|
||||
return freq;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_set_freq - set the frequency
|
||||
*/
|
||||
static int si470x_set_freq(struct si470x_device *radio, int freq)
|
||||
{
|
||||
int spacing, band_bottom, chan;
|
||||
|
||||
/* Spacing (kHz) */
|
||||
switch (space) {
|
||||
/* 0: 200 kHz (USA, Australia) */
|
||||
default: spacing = 0.200 * FREQ_MUL; break;
|
||||
/* 1: 100 kHz (Europe, Japan) */
|
||||
case 1 : spacing = 0.100 * FREQ_MUL; break;
|
||||
/* 2: 50 kHz */
|
||||
case 2 : spacing = 0.050 * FREQ_MUL; break;
|
||||
};
|
||||
|
||||
/* Bottom of Band (MHz) */
|
||||
switch (band) {
|
||||
/* 0: 87.5 - 108 MHz (USA, Europe) */
|
||||
default: band_bottom = 87.5 * FREQ_MUL; break;
|
||||
/* 1: 76 - 108 MHz (Japan wide band) */
|
||||
case 1 : 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);
|
||||
}
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* RDS Driver Functions
|
||||
**************************************************************************/
|
||||
|
||||
/*
|
||||
* si470x_rds - rds processing function
|
||||
|
|
@ -941,107 +812,7 @@ static void si470x_work(struct work_struct *work)
|
|||
|
||||
|
||||
/**************************************************************************
|
||||
* USB interface functions
|
||||
**************************************************************************/
|
||||
|
||||
/*
|
||||
* 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;
|
||||
|
||||
if (!(radio = kmalloc(sizeof(struct si470x_device), GFP_KERNEL)))
|
||||
return -ENOMEM;
|
||||
if (!(radio->videodev = video_device_alloc())) {
|
||||
kfree(radio);
|
||||
return -ENOMEM;
|
||||
}
|
||||
memcpy(radio->videodev, &si470x_viddev_template,
|
||||
sizeof(si470x_viddev_template));
|
||||
radio->users = 0;
|
||||
radio->usbdev = interface_to_usbdev(intf);
|
||||
video_set_drvdata(radio->videodev, radio);
|
||||
if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr)) {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": Could not register video device\n");
|
||||
video_device_release(radio->videodev);
|
||||
kfree(radio);
|
||||
return -EIO;
|
||||
}
|
||||
usb_set_intfdata(intf, radio);
|
||||
|
||||
/* show some infos about the specific device */
|
||||
if (si470x_get_all_registers(radio) < 0) {
|
||||
video_device_release(radio->videodev);
|
||||
kfree(radio);
|
||||
return -EIO;
|
||||
}
|
||||
printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4x ChipID=0x%4.4x\n",
|
||||
radio->registers[DEVICEID], radio->registers[CHIPID]);
|
||||
|
||||
/* check if firmware is current */
|
||||
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE)
|
||||
< FMRADIO_SW_VERSION_CURRENT) {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": This driver is known to work with chip version %d, "
|
||||
"but the device has firmware %d. If you have some "
|
||||
"trouble using this driver, please report to V4L ML "
|
||||
"at video4linux-list@redhat.com\n",
|
||||
radio->registers[CHIPID] & CHIPID_FIRMWARE,
|
||||
FMRADIO_SW_VERSION_CURRENT);
|
||||
}
|
||||
|
||||
/* set initial frequency */
|
||||
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
|
||||
|
||||
/* rds initialization */
|
||||
radio->buf_size = rds_buf * 3;
|
||||
if (NULL == (radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL))) {
|
||||
video_device_release(radio->videodev);
|
||||
kfree(radio);
|
||||
return -ENOMEM;
|
||||
}
|
||||
radio->block_count = 0;
|
||||
radio->wr_index = 0;
|
||||
radio->rd_index = 0;
|
||||
radio->last_blocknum = 0xff;
|
||||
init_waitqueue_head(&radio->read_queue);
|
||||
radio->data_available_for_read = 0;
|
||||
|
||||
/* prepare polling via eventd */
|
||||
INIT_WORK(&radio->work, si470x_work);
|
||||
init_timer(&radio->timer);
|
||||
radio->timer.function = si470x_timer;
|
||||
radio->timer.data = (unsigned long) radio;
|
||||
|
||||
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);
|
||||
|
||||
del_timer_sync(&radio->timer);
|
||||
flush_scheduled_work();
|
||||
|
||||
usb_set_intfdata(intf, NULL);
|
||||
if (radio) {
|
||||
video_unregister_device(radio->videodev);
|
||||
kfree(radio->buffer);
|
||||
kfree(radio);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* Video4Linux interface functions
|
||||
* File Operations Interface
|
||||
**************************************************************************/
|
||||
|
||||
/*
|
||||
|
|
@ -1165,6 +936,68 @@ static int si470x_fops_release(struct inode *inode, struct file *file)
|
|||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_fops - file operations interface
|
||||
*/
|
||||
static const struct file_operations si470x_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.read = si470x_fops_read,
|
||||
.poll = si470x_fops_poll,
|
||||
.ioctl = video_ioctl2,
|
||||
.compat_ioctl = v4l_compat_ioctl32,
|
||||
.open = si470x_fops_open,
|
||||
.release = si470x_fops_release,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* Video4Linux Interface
|
||||
**************************************************************************/
|
||||
|
||||
/*
|
||||
* si470x_v4l2_queryctrl - query control
|
||||
*/
|
||||
static struct v4l2_queryctrl si470x_v4l2_queryctrl[] = {
|
||||
/* HINT: the disabled controls are only here to satify kradio and such apps */
|
||||
{
|
||||
.id = V4L2_CID_AUDIO_VOLUME,
|
||||
.type = V4L2_CTRL_TYPE_INTEGER,
|
||||
.name = "Volume",
|
||||
.minimum = 0,
|
||||
.maximum = 15,
|
||||
.step = 1,
|
||||
.default_value = 15,
|
||||
},
|
||||
{
|
||||
.id = V4L2_CID_AUDIO_BALANCE,
|
||||
.flags = V4L2_CTRL_FLAG_DISABLED,
|
||||
},
|
||||
{
|
||||
.id = V4L2_CID_AUDIO_BASS,
|
||||
.flags = V4L2_CTRL_FLAG_DISABLED,
|
||||
},
|
||||
{
|
||||
.id = V4L2_CID_AUDIO_TREBLE,
|
||||
.flags = V4L2_CTRL_FLAG_DISABLED,
|
||||
},
|
||||
{
|
||||
.id = V4L2_CID_AUDIO_MUTE,
|
||||
.type = V4L2_CTRL_TYPE_BOOLEAN,
|
||||
.name = "Mute",
|
||||
.minimum = 0,
|
||||
.maximum = 1,
|
||||
.step = 1,
|
||||
.default_value = 1,
|
||||
},
|
||||
{
|
||||
.id = V4L2_CID_AUDIO_LOUDNESS,
|
||||
.flags = V4L2_CTRL_FLAG_DISABLED,
|
||||
},
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* si470x_vidioc_querycap - query device capabilities
|
||||
*/
|
||||
|
|
@ -1213,9 +1046,9 @@ static int si470x_vidioc_queryctrl(struct file *file, void *priv,
|
|||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(radio_queryctrl); i++) {
|
||||
if (qc->id && qc->id == radio_queryctrl[i].id) {
|
||||
memcpy(qc, &(radio_queryctrl[i]), sizeof(*qc));
|
||||
for (i = 0; i < ARRAY_SIZE(si470x_v4l2_queryctrl); i++) {
|
||||
if (qc->id && qc->id == si470x_v4l2_queryctrl[i].id) {
|
||||
memcpy(qc, &(si470x_v4l2_queryctrl[i]), sizeof(*qc));
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
|
@ -1320,7 +1153,7 @@ static int si470x_vidioc_g_tuner(struct file *file, void *priv,
|
|||
|
||||
strcpy(tuner->name, "FM");
|
||||
tuner->type = V4L2_TUNER_RADIO;
|
||||
switch(band) {
|
||||
switch (band) {
|
||||
/* 0: 87.5 - 108 MHz (USA, Europe, default) */
|
||||
default:
|
||||
tuner->rangelow = 87.5 * FREQ_MUL;
|
||||
|
|
@ -1407,9 +1240,147 @@ static int si470x_vidioc_s_frequency(struct file *file, void *priv,
|
|||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_viddev_tamples - video device interface
|
||||
*/
|
||||
static struct video_device si470x_viddev_template = {
|
||||
.fops = &si470x_fops,
|
||||
.name = DRIVER_NAME,
|
||||
.type = VID_TYPE_TUNER,
|
||||
.release = video_device_release,
|
||||
.vidioc_querycap = si470x_vidioc_querycap,
|
||||
.vidioc_g_input = si470x_vidioc_g_input,
|
||||
.vidioc_s_input = si470x_vidioc_s_input,
|
||||
.vidioc_queryctrl = si470x_vidioc_queryctrl,
|
||||
.vidioc_g_ctrl = si470x_vidioc_g_ctrl,
|
||||
.vidioc_s_ctrl = si470x_vidioc_s_ctrl,
|
||||
.vidioc_g_audio = si470x_vidioc_g_audio,
|
||||
.vidioc_s_audio = si470x_vidioc_s_audio,
|
||||
.vidioc_g_tuner = si470x_vidioc_g_tuner,
|
||||
.vidioc_s_tuner = si470x_vidioc_s_tuner,
|
||||
.vidioc_g_frequency = si470x_vidioc_g_frequency,
|
||||
.vidioc_s_frequency = si470x_vidioc_s_frequency,
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* Module interface definitions and functions
|
||||
* 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;
|
||||
|
||||
/* memory and interface allocations */
|
||||
radio = kmalloc(sizeof(struct si470x_device), GFP_KERNEL);
|
||||
if (!radio)
|
||||
return -ENOMEM;
|
||||
radio->videodev = video_device_alloc();
|
||||
if (!radio->videodev) {
|
||||
kfree(radio);
|
||||
return -ENOMEM;
|
||||
}
|
||||
memcpy(radio->videodev, &si470x_viddev_template,
|
||||
sizeof(si470x_viddev_template));
|
||||
radio->users = 0;
|
||||
radio->usbdev = interface_to_usbdev(intf);
|
||||
video_set_drvdata(radio->videodev, radio);
|
||||
if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr)) {
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": Could not register video device\n");
|
||||
video_device_release(radio->videodev);
|
||||
kfree(radio);
|
||||
return -EIO;
|
||||
}
|
||||
usb_set_intfdata(intf, radio);
|
||||
|
||||
/* show some infos about the specific device */
|
||||
if (si470x_get_all_registers(radio) < 0) {
|
||||
video_device_release(radio->videodev);
|
||||
kfree(radio);
|
||||
return -EIO;
|
||||
}
|
||||
printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4x ChipID=0x%4.4x\n",
|
||||
radio->registers[DEVICEID], radio->registers[CHIPID]);
|
||||
|
||||
/* check if firmware is current */
|
||||
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE)
|
||||
< RADIO_SW_VERSION_CURRENT)
|
||||
printk(KERN_WARNING DRIVER_NAME
|
||||
": This driver is known to work with chip version %d, "
|
||||
"but the device has firmware %d. If you have some "
|
||||
"trouble using this driver, please report to V4L ML "
|
||||
"at video4linux-list@redhat.com\n",
|
||||
radio->registers[CHIPID] & CHIPID_FIRMWARE,
|
||||
RADIO_SW_VERSION_CURRENT);
|
||||
|
||||
/* set initial frequency */
|
||||
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
|
||||
|
||||
/* rds initialization */
|
||||
radio->buf_size = rds_buf * 3;
|
||||
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
|
||||
if (!radio->buffer) {
|
||||
video_device_release(radio->videodev);
|
||||
kfree(radio);
|
||||
return -ENOMEM;
|
||||
}
|
||||
radio->block_count = 0;
|
||||
radio->wr_index = 0;
|
||||
radio->rd_index = 0;
|
||||
radio->last_blocknum = 0xff;
|
||||
init_waitqueue_head(&radio->read_queue);
|
||||
radio->data_available_for_read = 0;
|
||||
|
||||
/* prepare polling via eventd */
|
||||
INIT_WORK(&radio->work, si470x_work);
|
||||
init_timer(&radio->timer);
|
||||
radio->timer.function = si470x_timer;
|
||||
radio->timer.data = (unsigned long) radio;
|
||||
|
||||
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);
|
||||
|
||||
del_timer_sync(&radio->timer);
|
||||
flush_scheduled_work();
|
||||
|
||||
usb_set_intfdata(intf, NULL);
|
||||
if (radio) {
|
||||
video_unregister_device(radio->videodev);
|
||||
kfree(radio->buffer);
|
||||
kfree(radio);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* 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,
|
||||
.id_table = si470x_usb_driver_id_table,
|
||||
};
|
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* Module Interface
|
||||
**************************************************************************/
|
||||
|
||||
/*
|
||||
|
|
@ -1437,4 +1408,4 @@ module_exit(si470x_module_exit);
|
|||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_VERSION("1.0.2");
|
||||
MODULE_VERSION("1.0.3");
|
||||
|
|
|
|||
Loading…
Reference in a new issue