drivers/media/radio/wl128x/fmdrv.h

   1 /*
   2  *  FM Driver for Connectivity chip of Texas Instruments.
   3  *
   4  *  Common header for all FM driver sub-modules.
   5  *
   6  *  Copyright (C) 2011 Texas Instruments
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22
  23 #ifndef _FM_DRV_H
  24 #define _FM_DRV_H
  25
  26 #include <linux/skbuff.h>
  27 #include <linux/interrupt.h>
  28 #include <sound/core.h>
  29 #include <sound/initval.h>
  30 #include <linux/timer.h>
  31 #include <media/v4l2-ioctl.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-device.h>
  34 #include <media/v4l2-ctrls.h>
  35
  36 #define FM_DRV_VERSION            "0.1.1"
  37 #define FM_DRV_NAME               "ti_fmdrv"
  38 #define FM_DRV_CARD_SHORT_NAME    "TI FM Radio"
  39 #define FM_DRV_CARD_LONG_NAME     "Texas Instruments FM Radio"
  40
  41 /* Flag info */
  42 #define FM_INTTASK_RUNNING            0
  43 #define FM_INTTASK_SCHEDULE_PENDING   1
  44 #define FM_FW_DW_INPROGRESS     2
  45 #define FM_CORE_READY                 3
  46 #define FM_CORE_TRANSPORT_READY       4
  47 #define FM_AF_SWITCH_INPROGRESS       5
  48 #define FM_CORE_TX_XMITING            6
  49
  50 #define FM_TUNE_COMPLETE              0x1
  51 #define FM_BAND_LIMIT                 0x2
  52
  53 #define FM_DRV_TX_TIMEOUT      (5*HZ)   /* 5 seconds */
  54 #define FM_DRV_RX_SEEK_TIMEOUT (20*HZ)  /* 20 seconds */
  55
  56 #define fmerr(format, ...) \
  57         printk(KERN_ERR "fmdrv: " format, ## __VA_ARGS__)
  58 #define fmwarn(format, ...) \
  59         printk(KERN_WARNING "fmdrv: " format, ##__VA_ARGS__)
  60 #ifdef DEBUG
  61 #define fmdbg(format, ...) \
  62         printk(KERN_DEBUG "fmdrv: " format, ## __VA_ARGS__)
  63 #else /* DEBUG */
  64 #define fmdbg(format, ...) do {} while(0)
  65 #endif
  66 enum {
  67         FM_MODE_OFF,
  68         FM_MODE_TX,
  69         FM_MODE_RX,
  70         FM_MODE_ENTRY_MAX
  71 };
  72
  73 #define FM_RX_RDS_INFO_FIELD_MAX        8       /* 4 Group * 2 Bytes */
  74
  75 /* RX RDS data format */
  76 struct fm_rdsdata_format {
  77         union {
  78                 struct {
  79                         u8 buff[FM_RX_RDS_INFO_FIELD_MAX];
  80                 } groupdatabuff;
  81                 struct {
  82                         u16 pidata;
  83                         u8 blk_b[2];
  84                         u8 blk_c[2];
  85                         u8 blk_d[2];
  86                 } groupgeneral;
  87                 struct {
  88                         u16 pidata;
  89                         u8 blk_b[2];
  90                         u8 af[2];
  91                         u8 ps[2];
  92                 } group0A;
  93                 struct {
  94                         u16 pi[2];
  95                         u8 blk_b[2];
  96                         u8 ps[2];
  97                 } group0B;
  98         } data;
  99 };
 100
 101 /* FM region (Europe/US, Japan) info */
 102 struct region_info {
 103         u32 chanl_space;
 104         u32 bot_freq;
 105         u32 top_freq;
 106         u8 fm_band;
 107 };
 108 struct fmdev;
 109 typedef void (*int_handler_prototype) (struct fmdev *);
 110
 111 /* FM Interrupt processing related info */
 112 struct fm_irq {
 113         u8 stage;
 114         u16 flag;       /* FM interrupt flag */
 115         u16 mask;       /* FM interrupt mask */
 116         /* Interrupt process timeout handler */
 117         struct timer_list timer;
 118         u8 retry;
 119         int_handler_prototype *handlers;
 120 };
 121
 122 /* RDS info */
 123 struct fm_rds {
 124         u8 flag;        /* RX RDS on/off status */
 125         u8 last_blk_idx;        /* Last received RDS block */
 126
 127         /* RDS buffer */
 128         wait_queue_head_t read_queue;
 129         u32 buf_size;   /* Size is always multiple of 3 */
 130         u32 wr_idx;
 131         u32 rd_idx;
 132         u8 *buff;
 133 };
 134
 135 #define FM_RDS_MAX_AF_LIST              25
 136
 137 /*
 138  * Current RX channel Alternate Frequency cache.
 139  * This info is used to switch to other freq (AF)
 140  * when current channel signal strengh is below RSSI threshold.
 141  */
 142 struct tuned_station_info {
 143         u16 picode;
 144         u32 af_cache[FM_RDS_MAX_AF_LIST];
 145         u8 afcache_size;
 146         u8 af_list_max;
 147 };
 148
 149 /* FM RX mode info */
 150 struct fm_rx {
 151         struct region_info region;      /* Current selected band */
 152         u32 freq;       /* Current RX frquency */
 153         u8 mute_mode;   /* Current mute mode */
 154         u8 deemphasis_mode; /* Current deemphasis mode */
 155         /* RF dependent soft mute mode */
 156         u8 rf_depend_mute;
 157         u16 volume;     /* Current volume level */
 158         u16 rssi_threshold;     /* Current RSSI threshold level */
 159         /* Holds the index of the current AF jump */
 160         u8 afjump_idx;
 161         /* Will hold the frequency before the jump */
 162         u32 freq_before_jump;
 163         u8 rds_mode;    /* RDS operation mode (RDS/RDBS) */
 164         u8 af_mode;     /* Alternate frequency on/off */
 165         struct tuned_station_info stat_info;
 166         struct fm_rds rds;
 167 };
 168
 169 #define FMTX_RDS_TXT_STR_SIZE   25
 170 /*
 171  * FM TX RDS data
 172  *
 173  * @ text_type: is the text following PS or RT
 174  * @ text: radio text string which could either be PS or RT
 175  * @ af_freq: alternate frequency for Tx
 176  * TODO: to be declared in application
 177  */
 178 struct tx_rds {
 179         u8 text_type;
 180         u8 text[FMTX_RDS_TXT_STR_SIZE];
 181         u8 flag;
 182         u32 af_freq;
 183 };
 184 /*
 185  * FM TX global data
 186  *
 187  * @ pwr_lvl: Power Level of the Transmission from mixer control
 188  * @ xmit_state: Transmission state = Updated locally upon Start/Stop
 189  * @ audio_io: i2S/Analog
 190  * @ tx_frq: Transmission frequency
 191  */
 192 struct fmtx_data {
 193         u8 pwr_lvl;
 194         u8 xmit_state;
 195         u8 audio_io;
 196         u8 region;
 197         u16 aud_mode;
 198         u32 preemph;
 199         u32 tx_frq;
 200         struct tx_rds rds;
 201 };
 202
 203 /* FM driver operation structure */
 204 struct fmdev {
 205         struct video_device *radio_dev; /* V4L2 video device pointer */
 206         struct v4l2_device v4l2_dev;    /* V4L2 top level struct */
 207         struct snd_card *card;  /* Card which holds FM mixer controls */
 208         u16 asci_id;
 209         spinlock_t rds_buff_lock; /* To protect access to RDS buffer */
 210         spinlock_t resp_skb_lock; /* To protect access to received SKB */
 211
 212         long flag;              /*  FM driver state machine info */
 213         int streg_cbdata; /* status of ST registration */
 214
 215         struct sk_buff_head rx_q;       /* RX queue */
 216         struct tasklet_struct rx_task;  /* RX Tasklet */
 217
 218         struct sk_buff_head tx_q;       /* TX queue */
 219         struct tasklet_struct tx_task;  /* TX Tasklet */
 220         unsigned long last_tx_jiffies;  /* Timestamp of last pkt sent */
 221         atomic_t tx_cnt;        /* Number of packets can send at a time */
 222
 223         struct sk_buff *resp_skb;       /* Response from the chip */
 224         /* Main task completion handler */
 225         struct completion maintask_comp;
 226         /* Opcode of last command sent to the chip */
 227         u8 pre_op;
 228         /* Handler used for wakeup when response packet is received */
 229         struct completion *resp_comp;
 230         struct fm_irq irq_info;
 231         u8 curr_fmmode; /* Current FM chip mode (TX, RX, OFF) */
 232         struct fm_rx rx;        /* FM receiver info */
 233         struct fmtx_data tx_data;
 234
 235         /* V4L2 ctrl framwork handler*/
 236         struct v4l2_ctrl_handler ctrl_handler;
 237
 238         /* For core assisted locking */
 239         struct mutex mutex;
 240 };
 241 #endif