240 строки
6.1 KiB
C
240 строки
6.1 KiB
C
/*
|
|
* FM Driver for Connectivity chip of Texas Instruments.
|
|
*
|
|
* Common header for all FM driver sub-modules.
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#ifndef _FM_DRV_H
|
|
#define _FM_DRV_H
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <linux/interrupt.h>
|
|
#include <sound/core.h>
|
|
#include <sound/initval.h>
|
|
#include <linux/timer.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include <media/v4l2-common.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
|
|
#define FM_DRV_VERSION "0.1.1"
|
|
#define FM_DRV_NAME "ti_fmdrv"
|
|
#define FM_DRV_CARD_SHORT_NAME "TI FM Radio"
|
|
#define FM_DRV_CARD_LONG_NAME "Texas Instruments FM Radio"
|
|
|
|
/* Flag info */
|
|
#define FM_INTTASK_RUNNING 0
|
|
#define FM_INTTASK_SCHEDULE_PENDING 1
|
|
#define FM_FW_DW_INPROGRESS 2
|
|
#define FM_CORE_READY 3
|
|
#define FM_CORE_TRANSPORT_READY 4
|
|
#define FM_AF_SWITCH_INPROGRESS 5
|
|
#define FM_CORE_TX_XMITING 6
|
|
|
|
#define FM_TUNE_COMPLETE 0x1
|
|
#define FM_BAND_LIMIT 0x2
|
|
|
|
#define FM_DRV_TX_TIMEOUT (5*HZ) /* 5 seconds */
|
|
#define FM_DRV_RX_SEEK_TIMEOUT (20*HZ) /* 20 seconds */
|
|
|
|
#define fmerr(format, ...) \
|
|
printk(KERN_ERR "fmdrv: " format, ## __VA_ARGS__)
|
|
#define fmwarn(format, ...) \
|
|
printk(KERN_WARNING "fmdrv: " format, ##__VA_ARGS__)
|
|
#ifdef DEBUG
|
|
#define fmdbg(format, ...) \
|
|
printk(KERN_DEBUG "fmdrv: " format, ## __VA_ARGS__)
|
|
#else /* DEBUG */
|
|
#define fmdbg(format, ...)
|
|
#endif
|
|
enum {
|
|
FM_MODE_OFF,
|
|
FM_MODE_TX,
|
|
FM_MODE_RX,
|
|
FM_MODE_ENTRY_MAX
|
|
};
|
|
|
|
#define FM_RX_RDS_INFO_FIELD_MAX 8 /* 4 Group * 2 Bytes */
|
|
|
|
/* RX RDS data format */
|
|
struct fm_rdsdata_format {
|
|
union {
|
|
struct {
|
|
u8 buff[FM_RX_RDS_INFO_FIELD_MAX];
|
|
} groupdatabuff;
|
|
struct {
|
|
u16 pidata;
|
|
u8 blk_b[2];
|
|
u8 blk_c[2];
|
|
u8 blk_d[2];
|
|
} groupgeneral;
|
|
struct {
|
|
u16 pidata;
|
|
u8 blk_b[2];
|
|
u8 af[2];
|
|
u8 ps[2];
|
|
} group0A;
|
|
struct {
|
|
u16 pi[2];
|
|
u8 blk_b[2];
|
|
u8 ps[2];
|
|
} group0B;
|
|
} data;
|
|
};
|
|
|
|
/* FM region (Europe/US, Japan) info */
|
|
struct region_info {
|
|
u32 chanl_space;
|
|
u32 bot_freq;
|
|
u32 top_freq;
|
|
u8 fm_band;
|
|
};
|
|
struct fmdev;
|
|
typedef void (*int_handler_prototype) (struct fmdev *);
|
|
|
|
/* FM Interrupt processing related info */
|
|
struct fm_irq {
|
|
u8 stage;
|
|
u16 flag; /* FM interrupt flag */
|
|
u16 mask; /* FM interrupt mask */
|
|
/* Interrupt process timeout handler */
|
|
struct timer_list timer;
|
|
u8 retry;
|
|
int_handler_prototype *handlers;
|
|
};
|
|
|
|
/* RDS info */
|
|
struct fm_rds {
|
|
u8 flag; /* RX RDS on/off status */
|
|
u8 last_blk_idx; /* Last received RDS block */
|
|
|
|
/* RDS buffer */
|
|
wait_queue_head_t read_queue;
|
|
u32 buf_size; /* Size is always multiple of 3 */
|
|
u32 wr_idx;
|
|
u32 rd_idx;
|
|
u8 *buff;
|
|
};
|
|
|
|
#define FM_RDS_MAX_AF_LIST 25
|
|
|
|
/*
|
|
* Current RX channel Alternate Frequency cache.
|
|
* This info is used to switch to other freq (AF)
|
|
* when current channel signal strengh is below RSSI threshold.
|
|
*/
|
|
struct tuned_station_info {
|
|
u16 picode;
|
|
u32 af_cache[FM_RDS_MAX_AF_LIST];
|
|
u8 afcache_size;
|
|
u8 af_list_max;
|
|
};
|
|
|
|
/* FM RX mode info */
|
|
struct fm_rx {
|
|
struct region_info region; /* Current selected band */
|
|
u32 freq; /* Current RX frquency */
|
|
u8 mute_mode; /* Current mute mode */
|
|
u8 deemphasis_mode; /* Current deemphasis mode */
|
|
/* RF dependent soft mute mode */
|
|
u8 rf_depend_mute;
|
|
u16 volume; /* Current volume level */
|
|
u16 rssi_threshold; /* Current RSSI threshold level */
|
|
/* Holds the index of the current AF jump */
|
|
u8 afjump_idx;
|
|
/* Will hold the frequency before the jump */
|
|
u32 freq_before_jump;
|
|
u8 rds_mode; /* RDS operation mode (RDS/RDBS) */
|
|
u8 af_mode; /* Alternate frequency on/off */
|
|
struct tuned_station_info stat_info;
|
|
struct fm_rds rds;
|
|
};
|
|
|
|
#define FMTX_RDS_TXT_STR_SIZE 25
|
|
/*
|
|
* FM TX RDS data
|
|
*
|
|
* @ text_type: is the text following PS or RT
|
|
* @ text: radio text string which could either be PS or RT
|
|
* @ af_freq: alternate frequency for Tx
|
|
* TODO: to be declared in application
|
|
*/
|
|
struct tx_rds {
|
|
u8 text_type;
|
|
u8 text[FMTX_RDS_TXT_STR_SIZE];
|
|
u8 flag;
|
|
u32 af_freq;
|
|
};
|
|
/*
|
|
* FM TX global data
|
|
*
|
|
* @ pwr_lvl: Power Level of the Transmission from mixer control
|
|
* @ xmit_state: Transmission state = Updated locally upon Start/Stop
|
|
* @ audio_io: i2S/Analog
|
|
* @ tx_frq: Transmission frequency
|
|
*/
|
|
struct fmtx_data {
|
|
u8 pwr_lvl;
|
|
u8 xmit_state;
|
|
u8 audio_io;
|
|
u8 region;
|
|
u16 aud_mode;
|
|
u32 preemph;
|
|
u32 tx_frq;
|
|
struct tx_rds rds;
|
|
};
|
|
|
|
/* FM driver operation structure */
|
|
struct fmdev {
|
|
struct video_device *radio_dev; /* V4L2 video device pointer */
|
|
struct snd_card *card; /* Card which holds FM mixer controls */
|
|
u16 asci_id;
|
|
spinlock_t rds_buff_lock; /* To protect access to RDS buffer */
|
|
spinlock_t resp_skb_lock; /* To protect access to received SKB */
|
|
|
|
long flag; /* FM driver state machine info */
|
|
u8 streg_cbdata; /* status of ST registration */
|
|
|
|
struct sk_buff_head rx_q; /* RX queue */
|
|
struct tasklet_struct rx_task; /* RX Tasklet */
|
|
|
|
struct sk_buff_head tx_q; /* TX queue */
|
|
struct tasklet_struct tx_task; /* TX Tasklet */
|
|
unsigned long last_tx_jiffies; /* Timestamp of last pkt sent */
|
|
atomic_t tx_cnt; /* Number of packets can send at a time */
|
|
|
|
struct sk_buff *resp_skb; /* Response from the chip */
|
|
/* Main task completion handler */
|
|
struct completion maintask_comp;
|
|
/* Opcode of last command sent to the chip */
|
|
u8 pre_op;
|
|
/* Handler used for wakeup when response packet is received */
|
|
struct completion *resp_comp;
|
|
struct fm_irq irq_info;
|
|
u8 curr_fmmode; /* Current FM chip mode (TX, RX, OFF) */
|
|
struct fm_rx rx; /* FM receiver info */
|
|
struct fmtx_data tx_data;
|
|
|
|
/* V4L2 ctrl framwork handler*/
|
|
struct v4l2_ctrl_handler ctrl_handler;
|
|
|
|
/* For core assisted locking */
|
|
struct mutex mutex;
|
|
};
|
|
#endif
|