238 lines
6 KiB
C
238 lines
6 KiB
C
/*
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* FM Driver for Connectivity chip of Texas Instruments.
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*
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* Common header for all FM driver sub-modules.
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*
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* Copyright (C) 2011 Texas Instruments
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _FM_DRV_H
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#define _FM_DRV_H
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#include <linux/skbuff.h>
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#include <linux/interrupt.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <linux/timer.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ctrls.h>
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#define FM_DRV_VERSION "0.1.1"
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#define FM_DRV_NAME "ti_fmdrv"
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#define FM_DRV_CARD_SHORT_NAME "TI FM Radio"
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#define FM_DRV_CARD_LONG_NAME "Texas Instruments FM Radio"
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/* Flag info */
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#define FM_INTTASK_RUNNING 0
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#define FM_INTTASK_SCHEDULE_PENDING 1
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#define FM_FW_DW_INPROGRESS 2
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#define FM_CORE_READY 3
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#define FM_CORE_TRANSPORT_READY 4
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#define FM_AF_SWITCH_INPROGRESS 5
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#define FM_CORE_TX_XMITING 6
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#define FM_TUNE_COMPLETE 0x1
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#define FM_BAND_LIMIT 0x2
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#define FM_DRV_TX_TIMEOUT (5*HZ) /* 5 seconds */
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#define FM_DRV_RX_SEEK_TIMEOUT (20*HZ) /* 20 seconds */
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#define fmerr(format, ...) \
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printk(KERN_ERR "fmdrv: " format, ## __VA_ARGS__)
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#define fmwarn(format, ...) \
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printk(KERN_WARNING "fmdrv: " format, ##__VA_ARGS__)
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#ifdef DEBUG
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#define fmdbg(format, ...) \
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printk(KERN_DEBUG "fmdrv: " format, ## __VA_ARGS__)
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#else /* DEBUG */
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#define fmdbg(format, ...) do {} while(0)
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#endif
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enum {
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FM_MODE_OFF,
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FM_MODE_TX,
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FM_MODE_RX,
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FM_MODE_ENTRY_MAX
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};
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#define FM_RX_RDS_INFO_FIELD_MAX 8 /* 4 Group * 2 Bytes */
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/* RX RDS data format */
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struct fm_rdsdata_format {
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union {
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struct {
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u8 buff[FM_RX_RDS_INFO_FIELD_MAX];
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} groupdatabuff;
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struct {
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u16 pidata;
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u8 blk_b[2];
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u8 blk_c[2];
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u8 blk_d[2];
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} groupgeneral;
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struct {
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u16 pidata;
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u8 blk_b[2];
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u8 af[2];
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u8 ps[2];
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} group0A;
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struct {
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u16 pi[2];
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u8 blk_b[2];
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u8 ps[2];
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} group0B;
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} data;
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};
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/* FM region (Europe/US, Japan) info */
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struct region_info {
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u32 chanl_space;
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u32 bot_freq;
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u32 top_freq;
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u8 fm_band;
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};
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struct fmdev;
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typedef void (*int_handler_prototype) (struct fmdev *);
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/* FM Interrupt processing related info */
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struct fm_irq {
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u8 stage;
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u16 flag; /* FM interrupt flag */
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u16 mask; /* FM interrupt mask */
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/* Interrupt process timeout handler */
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struct timer_list timer;
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u8 retry;
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int_handler_prototype *handlers;
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};
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/* RDS info */
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struct fm_rds {
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u8 flag; /* RX RDS on/off status */
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u8 last_blk_idx; /* Last received RDS block */
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/* RDS buffer */
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wait_queue_head_t read_queue;
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u32 buf_size; /* Size is always multiple of 3 */
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u32 wr_idx;
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u32 rd_idx;
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u8 *buff;
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};
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#define FM_RDS_MAX_AF_LIST 25
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/*
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* Current RX channel Alternate Frequency cache.
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* This info is used to switch to other freq (AF)
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* when current channel signal strengh is below RSSI threshold.
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*/
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struct tuned_station_info {
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u16 picode;
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u32 af_cache[FM_RDS_MAX_AF_LIST];
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u8 afcache_size;
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u8 af_list_max;
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};
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/* FM RX mode info */
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struct fm_rx {
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struct region_info region; /* Current selected band */
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u32 freq; /* Current RX frquency */
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u8 mute_mode; /* Current mute mode */
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u8 deemphasis_mode; /* Current deemphasis mode */
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/* RF dependent soft mute mode */
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u8 rf_depend_mute;
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u16 volume; /* Current volume level */
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u16 rssi_threshold; /* Current RSSI threshold level */
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/* Holds the index of the current AF jump */
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u8 afjump_idx;
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/* Will hold the frequency before the jump */
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u32 freq_before_jump;
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u8 rds_mode; /* RDS operation mode (RDS/RDBS) */
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u8 af_mode; /* Alternate frequency on/off */
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struct tuned_station_info stat_info;
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struct fm_rds rds;
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};
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#define FMTX_RDS_TXT_STR_SIZE 25
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/*
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* FM TX RDS data
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*
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* @ text_type: is the text following PS or RT
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* @ text: radio text string which could either be PS or RT
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* @ af_freq: alternate frequency for Tx
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* TODO: to be declared in application
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*/
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struct tx_rds {
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u8 text_type;
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u8 text[FMTX_RDS_TXT_STR_SIZE];
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u8 flag;
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u32 af_freq;
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};
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/*
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* FM TX global data
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*
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* @ pwr_lvl: Power Level of the Transmission from mixer control
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* @ xmit_state: Transmission state = Updated locally upon Start/Stop
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* @ audio_io: i2S/Analog
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* @ tx_frq: Transmission frequency
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*/
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struct fmtx_data {
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u8 pwr_lvl;
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u8 xmit_state;
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u8 audio_io;
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u8 region;
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u16 aud_mode;
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u32 preemph;
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u32 tx_frq;
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struct tx_rds rds;
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};
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/* FM driver operation structure */
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struct fmdev {
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struct video_device *radio_dev; /* V4L2 video device pointer */
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struct v4l2_device v4l2_dev; /* V4L2 top level struct */
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struct snd_card *card; /* Card which holds FM mixer controls */
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u16 asci_id;
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spinlock_t rds_buff_lock; /* To protect access to RDS buffer */
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spinlock_t resp_skb_lock; /* To protect access to received SKB */
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long flag; /* FM driver state machine info */
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int streg_cbdata; /* status of ST registration */
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struct sk_buff_head rx_q; /* RX queue */
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struct tasklet_struct rx_task; /* RX Tasklet */
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struct sk_buff_head tx_q; /* TX queue */
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struct tasklet_struct tx_task; /* TX Tasklet */
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unsigned long last_tx_jiffies; /* Timestamp of last pkt sent */
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atomic_t tx_cnt; /* Number of packets can send at a time */
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struct sk_buff *resp_skb; /* Response from the chip */
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/* Main task completion handler */
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struct completion maintask_comp;
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/* Opcode of last command sent to the chip */
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u8 pre_op;
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/* Handler used for wakeup when response packet is received */
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struct completion *resp_comp;
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struct fm_irq irq_info;
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u8 curr_fmmode; /* Current FM chip mode (TX, RX, OFF) */
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struct fm_rx rx; /* FM receiver info */
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struct fmtx_data tx_data;
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/* V4L2 ctrl framwork handler*/
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struct v4l2_ctrl_handler ctrl_handler;
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/* For core assisted locking */
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struct mutex mutex;
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};
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#endif
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