parport_pc.h | Explore in Territory

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_PARPORT_PC_H
#define __LINUX_PARPORT_PC_H

#include <asm/io.h>

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

#define ECONTROL(p) …
#define CONFIGB(p) …
#define CONFIGA(p) …
#define FIFO(p) …
#define EPPDATA(p) …
#define EPPADDR(p) …
#define CONTROL(p) …
#define STATUS(p) …
#define DATA(p) …

struct parport_pc_private { … };

struct parport_pc_via_data
{ … };

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

static __inline__ unsigned char parport_pc_read_data(struct parport *p)
{ … }

#ifdef DEBUG_PARPORT
static inline void dump_parport_state (char *str, struct parport *p)
{
	/* here's hoping that reading these ports won't side-effect anything underneath */
	unsigned char ecr = inb (ECONTROL (p));
	unsigned char dcr = inb (CONTROL (p));
	unsigned char dsr = inb (STATUS (p));
	static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
	const struct parport_pc_private *priv = p->physport->private_data;
	int i;

	printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
	if (ecr & 0x10) printk (",nErrIntrEn");
	if (ecr & 0x08) printk (",dmaEn");
	if (ecr & 0x04) printk (",serviceIntr");
	if (ecr & 0x02) printk (",f_full");
	if (ecr & 0x01) printk (",f_empty");
	for (i=0; i<2; i++) {
		printk ("]  dcr(%s)=[", i ? "soft" : "hard");
		dcr = i ? priv->ctr : inb (CONTROL (p));
	
		if (dcr & 0x20) {
			printk ("rev");
		} else {
			printk ("fwd");
		}
		if (dcr & 0x10) printk (",ackIntEn");
		if (!(dcr & 0x08)) printk (",N-SELECT-IN");
		if (dcr & 0x04) printk (",N-INIT");
		if (!(dcr & 0x02)) printk (",N-AUTOFD");
		if (!(dcr & 0x01)) printk (",N-STROBE");
	}
	printk ("]  dsr=[");
	if (!(dsr & 0x80)) printk ("BUSY");
	if (dsr & 0x40) printk (",N-ACK");
	if (dsr & 0x20) printk (",PERROR");
	if (dsr & 0x10) printk (",SELECT");
	if (dsr & 0x08) printk (",N-FAULT");
	printk ("]\n");
	return;
}
#else	/* !DEBUG_PARPORT */
#define dump_parport_state(args...) …
#endif	/* !DEBUG_PARPORT */

/* __parport_pc_frob_control differs from parport_pc_frob_control in that
 * it doesn't do any extra masking. */
static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
							   unsigned char mask,
							   unsigned char val)
{ … }

static __inline__ void parport_pc_data_reverse (struct parport *p)
{ … }

static __inline__ void parport_pc_data_forward (struct parport *p)
{ … }

static __inline__ void parport_pc_write_control (struct parport *p,
						 unsigned char d)
{ … }

static __inline__ unsigned char parport_pc_read_control(struct parport *p)
{ … }

static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
							 unsigned char mask,
							 unsigned char val)
{ … }

static __inline__ unsigned char parport_pc_read_status(struct parport *p)
{ … }


static __inline__ void parport_pc_disable_irq(struct parport *p)
{ … }

static __inline__ 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);

/* PCMCIA code will want to get us to look at a port.  Provide a mechanism. */
extern struct parport *parport_pc_probe_port(unsigned long base,
					     unsigned long base_hi,
					     int irq, int dma,
					     struct device *dev,
					     int irqflags);
extern void parport_pc_unregister_port(struct parport *p);

#endif
linux/include/linux/parport_pc.h
