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bfin_sport.h

/*
 * bfin_sport.h - userspace header for bfin sport driver
 *
 * Copyright 2004-2008 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef __BFIN_SPORT_H__
#define __BFIN_SPORT_H__

#ifdef __KERNEL__
#include <linux/cdev.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/wait.h>
#endif

#define SPORT_MAJOR     237
#define SPORT_NR_DEVS   2

/* Sport mode: it can be set to TDM, i2s or others */
#define NORM_MODE 0x0
#define TDM_MODE  0x1
#define I2S_MODE  0x2

/* Data format, normal, a-law or u-law */
#define NORM_FORMAT     0x0
#define ALAW_FORMAT     0x2
#define ULAW_FORMAT     0x3

/* Function driver which use sport must initialize the structure */
00033 struct sport_config {
      /* TDM (multichannels), I2S or other mode */
      unsigned int mode:3;

      /* if TDM mode is selected, channels must be set */
      int channels;           /* Must be in 8 units */
      unsigned int frame_delay:4;   /* Delay between frame sync pulse and first bit */

      /* I2S mode */
      unsigned int right_first:1;   /* Right stereo channel first */

      /* In mormal mode, the following item need to be set */
      unsigned int lsb_first:1;     /* order of transmit or receive data */
      unsigned int fsync:1;   /* Frame sync required */
      unsigned int data_indep:1;    /* data independent frame sync generated */
      unsigned int act_low:1; /* Active low TFS */
      unsigned int late_fsync:1;    /* Late frame sync */
      unsigned int tckfe:1;
      unsigned int sec_en:1;  /* Secondary side enabled */

      /* Choose clock source */
      unsigned int int_clk:1; /* Internal or external clock */

      /* If external clock is used, the following fields are ignored */
      int serial_clk;
      int fsync_clk;

      unsigned int data_format:2;   /* Normal, u-law or a-law */

      int word_len;           /* How length of the word in bits, 3-32 bits */
      int dma_enabled;
};

/* Userspace interface */
#define SPORT_IOC_MAGIC       'P'
#define SPORT_IOC_CONFIG      _IOWR('P', 0x01, struct sport_config)

#ifdef __KERNEL__

struct sport_register {
      unsigned short tcr1;
      unsigned short reserved0;
      unsigned short tcr2;
      unsigned short reserved1;
      unsigned short tclkdiv;
      unsigned short reserved2;
      unsigned short tfsdiv;
      unsigned short reserved3;
      unsigned long tx;
      unsigned long reserved_l0;
      unsigned long rx;
      unsigned long reserved_l1;
      unsigned short rcr1;
      unsigned short reserved4;
      unsigned short rcr2;
      unsigned short reserved5;
      unsigned short rclkdiv;
      unsigned short reserved6;
      unsigned short rfsdiv;
      unsigned short reserved7;
      unsigned short stat;
      unsigned short reserved8;
      unsigned short chnl;
      unsigned short reserved9;
      unsigned short mcmc1;
      unsigned short reserved10;
      unsigned short mcmc2;
      unsigned short reserved11;
      unsigned long mtcs0;
      unsigned long mtcs1;
      unsigned long mtcs2;
      unsigned long mtcs3;
      unsigned long mrcs0;
      unsigned long mrcs1;
      unsigned long mrcs2;
      unsigned long mrcs3;
};

struct sport_dev {
      struct cdev cdev; /* Char device structure */

      int sport_num;

      int dma_rx_chan;
      int dma_tx_chan;

      int rx_irq;
      unsigned char *rx_buf;  /* Buffer store the received data */
      int rx_len;       /* How many bytes will be received */
      int rx_received;  /* How many bytes has been received */

      int tx_irq;
      const unsigned char *tx_buf;
      int tx_len;
      int tx_sent;

      int err_irq;

      struct mutex mutex;     /* mutual exclusion semaphore */
      struct task_struct *task;

      wait_queue_head_t waitq;
      int   wait_con;
      struct sport_register *regs;
      struct sport_config config;
};

#endif

#define SPORT_TCR1      0
#define     SPORT_TCR2  1
#define     SPORT_TCLKDIV     2
#define     SPORT_TFSDIV      3
#define     SPORT_RCR1  8
#define     SPORT_RCR2  9
#define SPORT_RCLKDIV   10
#define     SPORT_RFSDIV      11
#define SPORT_CHANNEL   13
#define SPORT_MCMC1     14
#define SPORT_MCMC2     15
#define SPORT_MTCS0     16
#define SPORT_MTCS1     17
#define SPORT_MTCS2     18
#define SPORT_MTCS3     19
#define SPORT_MRCS0     20
#define SPORT_MRCS1     21
#define SPORT_MRCS2     22
#define SPORT_MRCS3     23

#endif

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