arch/blackfin/include/asm/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 */
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