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-ctrls.h>
  34
  35 #define FM_DRV_VERSION            "0.1.1"
  36 #define FM_DRV_NAME               "ti_fmdrv"
  37 #define FM_DRV_CARD_SHORT_NAME    "TI FM Radio"
  38 #define FM_DRV_CARD_LONG_NAME     "Texas Instruments FM Radio"
  39
  40 /* Flag info */
  41 #define FM_INTTASK_RUNNING            0
  42 #define FM_INTTASK_SCHEDULE_PENDING   1
  43 #define FM_FW_DW_INPROGRESS     2
  44 #define FM_CORE_READY                 3
  45 #define FM_CORE_TRANSPORT_READY       4
  46 #define FM_AF_SWITCH_INPROGRESS       5
  47 #define FM_CORE_TX_XMITING            6
  48
  49 #define FM_TUNE_COMPLETE              0x1
  50 #define FM_BAND_LIMIT                 0x2
  51
  52 #define FM_DRV_TX_TIMEOUT      (5*HZ)   /* 5 seconds */
  53 #define FM_DRV_RX_SEEK_TIMEOUT (20*HZ)  /* 20 seconds */
  54
  55 #define fmerr(format, ...) \
  56         printk(KERN_ERR "fmdrv: " format, ## __VA_ARGS__)
  57 #define fmwarn(format, ...) \
  58         printk(KERN_WARNING "fmdrv: " format, ##__VA_ARGS__)
  59 #ifdef DEBUG
  60 #define fmdbg(format, ...) \
  61         printk(KERN_DEBUG "fmdrv: " format, ## __VA_ARGS__)
  62 #else /* DEBUG */
  63 #define fmdbg(format, ...)
  64 #endif
  65 enum {
  66         FM_MODE_OFF,
  67         FM_MODE_TX,
  68         FM_MODE_RX,
  69         FM_MODE_ENTRY_MAX
  70 };
  71
  72 #define FM_RX_RDS_INFO_FIELD_MAX        8       /* 4 Group * 2 Bytes */
  73
  74 /* RX RDS data format */
  75 struct fm_rdsdata_format {
  76         union {
  77                 struct {
  78                         u8 buff[FM_RX_RDS_INFO_FIELD_MAX];
  79                 } groupdatabuff;
  80                 struct {
  81                         u16 pidata;
  82                         u8 blk_b[2];
  83                         u8 blk_c[2];
  84                         u8 blk_d[2];
  85                 } groupgeneral;
  86                 struct {
  87                         u16 pidata;
  88                         u8 blk_b[2];
  89                         u8 af[2];
  90                         u8 ps[2];
  91                 } group0A;
  92                 struct {
  93                         u16 pi[2];
  94                         u8 blk_b[2];
  95                         u8 ps[2];
  96                 } group0B;
  97         } data;
  98 };
  99
 100 /* FM region (Europe/US, Japan) info */
 101 struct region_info {
 102         u32 chanl_space;
 103         u32 bot_freq;
 104         u32 top_freq;
 105         u8 fm_band;
 106 };
 107 struct fmdev;
 108 typedef void (*int_handler_prototype) (struct fmdev *);
 109
 110 /* FM Interrupt processing related info */
 111 struct fm_irq {
 112         u8 stage;
 113         u16 flag;       /* FM interrupt flag */
 114         u16 mask;       /* FM interrupt mask */
 115         /* Interrupt process timeout handler */
 116         struct timer_list timer;
 117         u8 retry;
 118         int_handler_prototype *handlers;
 119 };
 120
 121 /* RDS info */
 122 struct fm_rds {
 123         u8 flag;        /* RX RDS on/off status */
 124         u8 last_blk_idx;        /* Last received RDS block */
 125
 126         /* RDS buffer */
 127         wait_queue_head_t read_queue;
 128         u32 buf_size;   /* Size is always multiple of 3 */
 129         u32 wr_idx;
 130         u32 rd_idx;
 131         u8 *buff;
 132 };
 133
 134 #define FM_RDS_MAX_AF_LIST              25
 135
 136 /*
 137  * Current RX channel Alternate Frequency cache.
 138  * This info is used to switch to other freq (AF)
 139  * when current channel signal strengh is below RSSI threshold.
 140  */
 141 struct tuned_station_info {
 142         u16 picode;
 143         u32 af_cache[FM_RDS_MAX_AF_LIST];
 144         u8 afcache_size;
 145         u8 af_list_max;
 146 };
 147
 148 /* FM RX mode info */
 149 struct fm_rx {
 150         struct region_info region;      /* Current selected band */
 151         u32 freq;       /* Current RX frquency */
 152         u8 mute_mode;   /* Current mute mode */
 153         u8 deemphasis_mode; /* Current deemphasis mode */
 154         /* RF dependent soft mute mode */
 155         u8 rf_depend_mute;
 156         u16 volume;     /* Current volume level */
 157         u16 rssi_threshold;     /* Current RSSI threshold level */
 158         /* Holds the index of the current AF jump */
 159         u8 afjump_idx;
 160         /* Will hold the frequency before the jump */
 161         u32 freq_before_jump;
 162         u8 rds_mode;    /* RDS operation mode (RDS/RDBS) */
 163         u8 af_mode;     /* Alternate frequency on/off */
 164         struct tuned_station_info stat_info;
 165         struct fm_rds rds;
 166 };
 167
 168 #define FMTX_RDS_TXT_STR_SIZE   25
 169 /*
 170  * FM TX RDS data
 171  *
 172  * @ text_type: is the text following PS or RT
 173  * @ text: radio text string which could either be PS or RT
 174  * @ af_freq: alternate frequency for Tx
 175  * TODO: to be declared in application
 176  */
 177 struct tx_rds {
 178         u8 text_type;
 179         u8 text[FMTX_RDS_TXT_STR_SIZE];
 180         u8 flag;
 181         u32 af_freq;
 182 };
 183 /*
 184  * FM TX global data
 185  *
 186  * @ pwr_lvl: Power Level of the Transmission from mixer control
 187  * @ xmit_state: Transmission state = Updated locally upon Start/Stop
 188  * @ audio_io: i2S/Analog
 189  * @ tx_frq: Transmission frequency
 190  */
 191 struct fmtx_data {
 192         u8 pwr_lvl;
 193         u8 xmit_state;
 194         u8 audio_io;
 195         u8 region;
 196         u16 aud_mode;
 197         u32 preemph;
 198         u32 tx_frq;
 199         struct tx_rds rds;
 200 };
 201
 202 /* FM driver operation structure */
 203 struct fmdev {
 204         struct video_device *radio_dev; /* V4L2 video device pointer */
 205         struct snd_card *card;  /* Card which holds FM mixer controls */
 206         u16 asci_id;
 207         spinlock_t rds_buff_lock; /* To protect access to RDS buffer */
 208         spinlock_t resp_skb_lock; /* To protect access to received SKB */
 209
 210         long flag;              /*  FM driver state machine info */
 211         u8 streg_cbdata; /* status of ST registration */
 212
 213         struct sk_buff_head rx_q;       /* RX queue */
 214         struct tasklet_struct rx_task;  /* RX Tasklet */
 215
 216         struct sk_buff_head tx_q;       /* TX queue */
 217         struct tasklet_struct tx_task;  /* TX Tasklet */
 218         unsigned long last_tx_jiffies;  /* Timestamp of last pkt sent */
 219         atomic_t tx_cnt;        /* Number of packets can send at a time */
 220
 221         struct sk_buff *resp_skb;       /* Response from the chip */
 222         /* Main task completion handler */
 223         struct completion maintask_comp;
 224         /* Opcode of last command sent to the chip */
 225         u8 pre_op;
 226         /* Handler used for wakeup when response packet is received */
 227         struct completion *resp_comp;
 228         struct fm_irq irq_info;
 229         u8 curr_fmmode; /* Current FM chip mode (TX, RX, OFF) */
 230         struct fm_rx rx;        /* FM receiver info */
 231         struct fmtx_data tx_data;
 232
 233         /* V4L2 ctrl framwork handler*/
 234         struct v4l2_ctrl_handler ctrl_handler;
 235
 236         /* For core assisted locking */
 237         struct mutex mutex;
 238 };
 239 #endif