221 lines
8.1 KiB
C
221 lines
8.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* 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>
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/* driver definitions */
|
||
|
|
#define DRIVER_NAME "radio-si470x"
|
||
|
|
|
||
|
|
|
||
|
|
/* kernel includes */
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/input.h>
|
||
|
|
#include <linux/videodev2.h>
|
||
|
|
#include <linux/mutex.h>
|
||
|
|
#include <media/v4l2-common.h>
|
||
|
|
#include <media/v4l2-ioctl.h>
|
||
|
|
#include <media/v4l2-ctrls.h>
|
||
|
|
#include <media/v4l2-event.h>
|
||
|
|
#include <media/v4l2-device.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 SI_CHIPID 1 /* Chip ID */
|
||
|
|
#define SI_CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
|
||
|
|
#define SI_CHIPID_DEV 0x0200 /* bits 09..09: Device */
|
||
|
|
#define SI_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_GPIO2_DIS 0x0000 /* Disable GPIO 2 interrupt */
|
||
|
|
#define SYSCONFIG1_GPIO2_INT 0x0004 /* Enable STC/RDS interrupt */
|
||
|
|
#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 0x00c0 /* 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 v4l2_device v4l2_dev;
|
||
|
|
struct video_device videodev;
|
||
|
|
struct v4l2_ctrl_handler hdl;
|
||
|
|
int band;
|
||
|
|
|
||
|
|
/* 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;
|
||
|
|
|
||
|
|
struct completion completion;
|
||
|
|
bool status_rssi_auto_update; /* Does RSSI get updated automatic? */
|
||
|
|
|
||
|
|
/* si470x ops */
|
||
|
|
|
||
|
|
int (*get_register)(struct si470x_device *radio, int regnr);
|
||
|
|
int (*set_register)(struct si470x_device *radio, int regnr);
|
||
|
|
int (*fops_open)(struct file *file);
|
||
|
|
int (*fops_release)(struct file *file);
|
||
|
|
int (*vidioc_querycap)(struct file *file, void *priv,
|
||
|
|
struct v4l2_capability *capability);
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_USB_SI470X)
|
||
|
|
/* reference to USB and video device */
|
||
|
|
struct usb_device *usbdev;
|
||
|
|
struct usb_interface *intf;
|
||
|
|
char *usb_buf;
|
||
|
|
|
||
|
|
/* 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;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_I2C_SI470X)
|
||
|
|
struct i2c_client *client;
|
||
|
|
struct gpio_desc *gpio_reset;
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* Firmware Versions
|
||
|
|
**************************************************************************/
|
||
|
|
|
||
|
|
#define RADIO_FW_VERSION 12
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* Frequency Multiplicator
|
||
|
|
**************************************************************************/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 video_device si470x_viddev_template;
|
||
|
|
extern const struct v4l2_ctrl_ops si470x_ctrl_ops;
|
||
|
|
int si470x_disconnect_check(struct si470x_device *radio);
|
||
|
|
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);
|