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220 lines
8.1 KiB
220 lines
8.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* drivers/media/radio/si470x/radio-si470x.h |
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* |
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* Driver for radios with Silicon Labs Si470x FM Radio Receivers |
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* |
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* Copyright (c) 2009 Tobias Lorenz <[email protected]> |
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*/ |
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/* driver definitions */ |
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#define DRIVER_NAME "radio-si470x" |
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/* kernel includes */ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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#include <linux/input.h> |
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#include <linux/videodev2.h> |
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#include <linux/mutex.h> |
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#include <media/v4l2-common.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/v4l2-event.h> |
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#include <media/v4l2-device.h> |
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#include <asm/unaligned.h> |
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/************************************************************************** |
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* Register Definitions |
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**************************************************************************/ |
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#define RADIO_REGISTER_SIZE 2 /* 16 register bit width */ |
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#define RADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */ |
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#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */ |
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#define DEVICEID 0 /* Device ID */ |
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#define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */ |
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#define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */ |
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#define SI_CHIPID 1 /* Chip ID */ |
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#define SI_CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */ |
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#define SI_CHIPID_DEV 0x0200 /* bits 09..09: Device */ |
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#define SI_CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */ |
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#define POWERCFG 2 /* Power Configuration */ |
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#define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */ |
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#define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */ |
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#define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */ |
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#define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */ |
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#define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */ |
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#define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */ |
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#define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */ |
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#define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */ |
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#define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */ |
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#define CHANNEL 3 /* Channel */ |
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#define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */ |
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#define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */ |
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#define SYSCONFIG1 4 /* System Configuration 1 */ |
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#define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */ |
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#define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */ |
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#define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */ |
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#define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */ |
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#define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */ |
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#define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */ |
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#define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */ |
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#define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */ |
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#define SYSCONFIG1_GPIO2_DIS 0x0000 /* Disable GPIO 2 interrupt */ |
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#define SYSCONFIG1_GPIO2_INT 0x0004 /* Enable STC/RDS interrupt */ |
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#define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */ |
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#define SYSCONFIG2 5 /* System Configuration 2 */ |
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#define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */ |
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#define SYSCONFIG2_BAND 0x00c0 /* bits 07..06: Band Select */ |
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#define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */ |
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#define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */ |
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#define SYSCONFIG3 6 /* System Configuration 3 */ |
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#define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */ |
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#define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */ |
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#define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */ |
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#define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */ |
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#define TEST1 7 /* Test 1 */ |
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#define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */ |
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#define TEST2 8 /* Test 2 */ |
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/* TEST2 only contains reserved bits */ |
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#define BOOTCONFIG 9 /* Boot Configuration */ |
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/* BOOTCONFIG only contains reserved bits */ |
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#define STATUSRSSI 10 /* Status RSSI */ |
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#define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */ |
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#define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */ |
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#define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */ |
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#define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */ |
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#define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */ |
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#define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */ |
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#define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */ |
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#define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */ |
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#define READCHAN 11 /* Read Channel */ |
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#define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */ |
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#define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */ |
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#define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */ |
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#define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */ |
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#define RDSA 12 /* RDSA */ |
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#define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */ |
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#define RDSB 13 /* RDSB */ |
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#define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */ |
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#define RDSC 14 /* RDSC */ |
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#define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */ |
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#define RDSD 15 /* RDSD */ |
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#define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */ |
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/************************************************************************** |
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* General Driver Definitions |
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**************************************************************************/ |
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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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struct v4l2_device v4l2_dev; |
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struct video_device videodev; |
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struct v4l2_ctrl_handler hdl; |
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int band; |
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/* Silabs internal registers (0..15) */ |
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unsigned short registers[RADIO_REGISTER_NUM]; |
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/* RDS receive buffer */ |
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wait_queue_head_t read_queue; |
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struct mutex lock; /* buffer locking */ |
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unsigned char *buffer; /* size is always multiple of three */ |
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unsigned int buf_size; |
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unsigned int rd_index; |
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unsigned int wr_index; |
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struct completion completion; |
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bool status_rssi_auto_update; /* Does RSSI get updated automatic? */ |
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/* si470x ops */ |
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int (*get_register)(struct si470x_device *radio, int regnr); |
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int (*set_register)(struct si470x_device *radio, int regnr); |
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int (*fops_open)(struct file *file); |
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int (*fops_release)(struct file *file); |
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int (*vidioc_querycap)(struct file *file, void *priv, |
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struct v4l2_capability *capability); |
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#if IS_ENABLED(CONFIG_USB_SI470X) |
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/* reference to USB and video device */ |
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struct usb_device *usbdev; |
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struct usb_interface *intf; |
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char *usb_buf; |
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/* Interrupt endpoint handling */ |
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char *int_in_buffer; |
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struct usb_endpoint_descriptor *int_in_endpoint; |
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struct urb *int_in_urb; |
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int int_in_running; |
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/* scratch page */ |
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unsigned char software_version; |
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unsigned char hardware_version; |
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#endif |
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#if IS_ENABLED(CONFIG_I2C_SI470X) |
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struct i2c_client *client; |
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struct gpio_desc *gpio_reset; |
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#endif |
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}; |
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/************************************************************************** |
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* Firmware Versions |
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**************************************************************************/ |
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#define RADIO_FW_VERSION 12 |
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/************************************************************************** |
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* Frequency Multiplicator |
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**************************************************************************/ |
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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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/************************************************************************** |
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* Common Functions |
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**************************************************************************/ |
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extern const struct video_device si470x_viddev_template; |
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extern const struct v4l2_ctrl_ops si470x_ctrl_ops; |
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int si470x_disconnect_check(struct si470x_device *radio); |
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int si470x_set_freq(struct si470x_device *radio, unsigned int freq); |
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int si470x_start(struct si470x_device *radio); |
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int si470x_stop(struct si470x_device *radio);
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