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 242