/* *****************************************************************
 * (C) Copyright 2007 Benjamin Krill <ben@codiert.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
 * MA 02110-1301 USA
 * *****************************************************************/
#ifndef FPGAFS_H
#define FPGAFS_H

#include <linux/kref.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/fs.h>

/* magic number the file system */
enum {
  FPGAFS_MAGIC = 0x4255AA42,
};

struct fpga_context {
	char *load_buf;
	unsigned int lldrv;
	int bla;
};

struct fpgafs_inode_info {
	struct fpga_context *i_ctx;
	struct inode vfs_inode;
};

extern struct tree_descr fpgafs_dir_contents[];

#define FPGAFS_I(inode) \
		container_of(inode, struct fpgafs_inode_info, vfs_inode)


/* command definitions */
#define BLA 0

/* low level driver */
struct fpgafs_lldrv {
	char name[5];

	int (*init) (void);
	int (*exit) (void);

	int (*send) (struct fpga_context *ctx, const char __user *buf, int len);
	int (*recv) (struct fpga_context *ctx, unsigned char *buf, int len);

	int (*cmd) (struct fpga_context *ctx, const char __user *buf, int len);
	int (*stat) (struct fpga_context *ctx, unsigned char *buf, int len);

	int (*read_load) (struct fpga_context *ctx, unsigned  char *buf, int len);
	int (*write_load) (struct fpga_context *ctx, const char __user *buf, int len);
};

int fpgafs_register_lldrv(struct fpgafs_lldrv *drv);
int fpgafs_unregister_lldrv(struct fpgafs_lldrv *drv);

ssize_t fpgafs_send_data(struct file *file, const char __user *buf,
                                size_t len, loff_t *pos);
ssize_t fpgafs_recv_data(struct file *file, char __user *buf,
                                size_t len, loff_t *pos);

ssize_t fpgafs_write_load(struct file *file, const char __user *buf,
                                size_t len, loff_t *pos);
ssize_t fpgafs_read_load(struct file *file, char __user *buf,
                                size_t len, loff_t *pos);

ssize_t fpgafs_write_lldrv(struct file *file, const char __user *buf,
                                size_t len, loff_t *pos);
ssize_t fpgafs_read_lldrv(struct file *file, char __user *buf,
                                size_t len, loff_t *pos);

ssize_t fpgafs_read_stat(struct file *file, char __user *buf,
                         size_t len, loff_t *pos);
ssize_t fpgafs_write_cmd(struct file *file, const char __user *buf,
                         size_t len, loff_t *pos);

struct fpga_context* alloc_fpga_context(void);
void free_fpga_context(struct fpga_context *ctx);
#endif /* FPGAFS_H */