/*
* Silicon Labs C2 port Linux support
*
* Copyright (c) 2007 Rodolfo Giometti <[email protected]>
* Copyright (c) 2007 Eurotech S.p.A. <[email protected]>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation
*/

#include <linux/kmemcheck.h>

#define C2PORT_NAME_LEN 32

struct device;

/*
* C2 port basic structs
*/

/* Main struct */
struct c2port_ops;
struct c2port_device {
kmemcheck_bitfield_begin(flags);
unsigned int access:1;
unsigned int flash_access:1;
kmemcheck_bitfield_end(flags);

int id;
char name[C2PORT_NAME_LEN];
struct c2port_ops *ops;
struct mutex mutex; /* prevent races during read/write */

struct device *dev;

void *private_data;
};

/* Basic operations */
struct c2port_ops {
/* Flash layout */
unsigned short block_size; /* flash block size in bytes */
unsigned short blocks_num; /* flash blocks number */

/* Enable or disable the access to C2 port */
void (*access)(struct c2port_device *dev, int status);

/* Set C2D data line as input/output */
void (*c2d_dir)(struct c2port_device *dev, int dir);

/* Read/write C2D data line */
int (*c2d_get)(struct c2port_device *dev);
void (*c2d_set)(struct c2port_device *dev, int status);

/* Write C2CK clock line */
void (*c2ck_set)(struct c2port_device *dev, int status);
};

/*
* Exported functions
*/

extern struct c2port_device *c2port_device_register(char *name,
struct c2port_ops *ops, void *devdata);
extern void c2port_device_unregister(struct c2port_device *dev);