#ifndef __LINUX_PARPORT_PC_H
#define __LINUX_PARPORT_PC_H

#include <asm/io.h>

/* --- register definitions ------------------------------- */

#define ECONTROL(p) ((p)->base_hi + 0x2)
#define CONFIGB(p)  ((p)->base_hi + 0x1)
#define CONFIGA(p)  ((p)->base_hi + 0x0)
#define FIFO(p)     ((p)->base_hi + 0x0)
#define EPPDATA(p)  ((p)->base    + 0x4)
#define EPPADDR(p)  ((p)->base    + 0x3)
#define CONTROL(p)  ((p)->base    + 0x2)
#define STATUS(p)   ((p)->base    + 0x1)
#define DATA(p)     ((p)->base    + 0x0)

/* Private data for PC low-level driver. */
struct parport_pc_private {
	/* Contents of CTR. */
	unsigned char ctr;
};

extern int parport_pc_epp_clear_timeout(struct parport *pb);

extern volatile unsigned char parport_pc_ctr;

static __inline__ void parport_pc_write_epp(struct parport *p, unsigned char d)
{
	outb(d, EPPDATA(p));
}

static __inline__ unsigned char parport_pc_read_epp(struct parport *p)
{
	return inb(EPPDATA(p));
}

static __inline__ void parport_pc_write_epp_addr(struct parport *p, unsigned char d)
{
	outb(d, EPPADDR(p));
}

static __inline__ unsigned char parport_pc_read_epp_addr(struct parport *p)
{
	return inb(EPPADDR(p));
}

static __inline__ int parport_pc_check_epp_timeout(struct parport *p)
{
	if (!(inb(STATUS(p)) & 1))
		return 0;
	parport_pc_epp_clear_timeout(p);
	return 1;
}

static __inline__ unsigned char parport_pc_read_configb(struct parport *p)
{
	return inb(CONFIGB(p));
}

static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
{
	outb(d, DATA(p));
}

static __inline__ unsigned char parport_pc_read_data(struct parport *p)
{
	return inb(DATA(p));
}

static __inline__ void parport_pc_write_control(struct parport *p, unsigned char d)
{
	struct parport_pc_private *priv = p->private_data;
	priv->ctr = d;/* update soft copy */
	outb(d, CONTROL(p));
}

static __inline__ unsigned char parport_pc_read_control(struct parport *p)
{
	struct parport_pc_private *priv = p->private_data;
	return priv->ctr;
}

static __inline__ unsigned char parport_pc_frob_control(struct parport *p, unsigned char mask,  unsigned char val)
{
	struct parport_pc_private *priv = p->private_data;
	unsigned char ctr = priv->ctr;
	ctr = (ctr & ~mask) ^ val;
	outb (ctr, CONTROL(p));
	return priv->ctr = ctr; /* update soft copy */
}

static __inline__ void parport_pc_write_status(struct parport *p, unsigned char d)
{
	outb(d, STATUS(p));
}

static __inline__ unsigned char parport_pc_read_status(struct parport *p)
{
	return inb(STATUS(p));
}

static __inline__ void parport_pc_write_econtrol(struct parport *p, unsigned char d)
{
	outb(d, ECONTROL(p));
}

static __inline__ unsigned char parport_pc_read_econtrol(struct parport *p)
{
	return inb(ECONTROL(p));
}

static __inline__ unsigned char parport_pc_frob_econtrol(struct parport *p, unsigned char mask,  unsigned char val)
{
	unsigned char old = inb(ECONTROL(p));
	outb(((old & ~mask) ^ val), ECONTROL(p));
	return old;
}

extern void parport_pc_change_mode(struct parport *p, int m);

extern void parport_pc_write_fifo(struct parport *p, unsigned char v);

extern unsigned char parport_pc_read_fifo(struct parport *p);

extern void parport_pc_disable_irq(struct parport *p);

extern void parport_pc_enable_irq(struct parport *p);

extern void parport_pc_release_resources(struct parport *p);

extern int parport_pc_claim_resources(struct parport *p);

extern void parport_pc_init_state(struct parport_state *s);

extern void parport_pc_save_state(struct parport *p, struct parport_state *s);

extern void parport_pc_restore_state(struct parport *p, struct parport_state *s);

extern size_t parport_pc_epp_read_block(struct parport *p, void *buf, size_t length);

extern size_t parport_pc_epp_write_block(struct parport *p, void *buf, size_t length);

extern int parport_pc_ecp_read_block(struct parport *p, void *buf, size_t length, void (*fn)(struct parport *, void *, size_t), void *handle);

extern int parport_pc_ecp_write_block(struct parport *p, void *buf, size_t length, void (*fn)(struct parport *, void *, size_t), void *handle);

extern void parport_pc_inc_use_count(void);

extern void parport_pc_dec_use_count(void);

#endif