arch/blackfin/include/asm/bfin_sport.h

   1 /*
   2  * bfin_sport.h - userspace header for bfin sport driver
   3  *
   4  * Copyright 2004-2008 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef __BFIN_SPORT_H__
  10 #define __BFIN_SPORT_H__
  11
  12 #ifdef __KERNEL__
  13 #include <linux/cdev.h>
  14 #include <linux/mutex.h>
  15 #include <linux/sched.h>
  16 #include <linux/wait.h>
  17 #endif
  18
  19 #define SPORT_MAJOR     237
  20 #define SPORT_NR_DEVS   2
  21
  22 /* Sport mode: it can be set to TDM, i2s or others */
  23 #define NORM_MODE       0x0
  24 #define TDM_MODE        0x1
  25 #define I2S_MODE        0x2
  26
  27 /* Data format, normal, a-law or u-law */
  28 #define NORM_FORMAT     0x0
  29 #define ALAW_FORMAT     0x2
  30 #define ULAW_FORMAT     0x3
  31
  32 /* Function driver which use sport must initialize the structure */
  33 struct sport_config {
  34         /* TDM (multichannels), I2S or other mode */
  35         unsigned int mode:3;
  36
  37         /* if TDM mode is selected, channels must be set */
  38         int channels;           /* Must be in 8 units */
  39         unsigned int frame_delay:4;     /* Delay between frame sync pulse and first bit */
  40
  41         /* I2S mode */
  42         unsigned int right_first:1;     /* Right stereo channel first */
  43
  44         /* In mormal mode, the following item need to be set */
  45         unsigned int lsb_first:1;       /* order of transmit or receive data */
  46         unsigned int fsync:1;   /* Frame sync required */
  47         unsigned int data_indep:1;      /* data independent frame sync generated */
  48         unsigned int act_low:1; /* Active low TFS */
  49         unsigned int late_fsync:1;      /* Late frame sync */
  50         unsigned int tckfe:1;
  51         unsigned int sec_en:1;  /* Secondary side enabled */
  52
  53         /* Choose clock source */
  54         unsigned int int_clk:1; /* Internal or external clock */
  55
  56         /* If external clock is used, the following fields are ignored */
  57         int serial_clk;
  58         int fsync_clk;
  59
  60         unsigned int data_format:2;     /* Normal, u-law or a-law */
  61
  62         int word_len;           /* How length of the word in bits, 3-32 bits */
  63         int dma_enabled;
  64 };
  65
  66 /* Userspace interface */
  67 #define SPORT_IOC_MAGIC         'P'
  68 #define SPORT_IOC_CONFIG        _IOWR('P', 0x01, struct sport_config)
  69
  70 #ifdef __KERNEL__
  71
  72 struct sport_register {
  73         unsigned short tcr1;
  74         unsigned short reserved0;
  75         unsigned short tcr2;
  76         unsigned short reserved1;
  77         unsigned short tclkdiv;
  78         unsigned short reserved2;
  79         unsigned short tfsdiv;
  80         unsigned short reserved3;
  81         unsigned long tx;
  82         unsigned long reserved_l0;
  83         unsigned long rx;
  84         unsigned long reserved_l1;
  85         unsigned short rcr1;
  86         unsigned short reserved4;
  87         unsigned short rcr2;
  88         unsigned short reserved5;
  89         unsigned short rclkdiv;
  90         unsigned short reserved6;
  91         unsigned short rfsdiv;
  92         unsigned short reserved7;
  93         unsigned short stat;
  94         unsigned short reserved8;
  95         unsigned short chnl;
  96         unsigned short reserved9;
  97         unsigned short mcmc1;
  98         unsigned short reserved10;
  99         unsigned short mcmc2;
 100         unsigned short reserved11;
 101         unsigned long mtcs0;
 102         unsigned long mtcs1;
 103         unsigned long mtcs2;
 104         unsigned long mtcs3;
 105         unsigned long mrcs0;
 106         unsigned long mrcs1;
 107         unsigned long mrcs2;
 108         unsigned long mrcs3;
 109 };
 110
 111 struct sport_dev {
 112         struct cdev cdev;       /* Char device structure */
 113
 114         int sport_num;
 115
 116         int dma_rx_chan;
 117         int dma_tx_chan;
 118
 119         int rx_irq;
 120         unsigned char *rx_buf;  /* Buffer store the received data */
 121         int rx_len;             /* How many bytes will be received */
 122         int rx_received;        /* How many bytes has been received */
 123
 124         int tx_irq;
 125         const unsigned char *tx_buf;
 126         int tx_len;
 127         int tx_sent;
 128
 129         int err_irq;
 130
 131         struct mutex mutex;     /* mutual exclusion semaphore */
 132         struct task_struct *task;
 133
 134         wait_queue_head_t waitq;
 135         int     wait_con;
 136         struct sport_register *regs;
 137         struct sport_config config;
 138 };
 139
 140 #endif
 141
 142 #define SPORT_TCR1      0
 143 #define SPORT_TCR2      1
 144 #define SPORT_TCLKDIV   2
 145 #define SPORT_TFSDIV    3
 146 #define SPORT_RCR1      8
 147 #define SPORT_RCR2      9
 148 #define SPORT_RCLKDIV   10
 149 #define SPORT_RFSDIV    11
 150 #define SPORT_CHANNEL   13
 151 #define SPORT_MCMC1     14
 152 #define SPORT_MCMC2     15
 153 #define SPORT_MTCS0     16
 154 #define SPORT_MTCS1     17
 155 #define SPORT_MTCS2     18
 156 #define SPORT_MTCS3     19
 157 #define SPORT_MRCS0     20
 158 #define SPORT_MRCS1     21
 159 #define SPORT_MRCS2     22
 160 #define SPORT_MRCS3     23
 161
 162 #endif