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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* pata_parport.h (c) 1997-8 Grant R. Guenther <grant@torque.net>
* Under the terms of the GPL.
*
* This file defines the interface for parallel port IDE adapter chip drivers.
*/
#ifndef LINUX_PATA_PARPORT_H
#define LINUX_PATA_PARPORT_H
#include <linux/libata.h>
#define PI_PCD 1 /* dummy for paride protocol modules */
struct pi_adapter {
struct device dev;
struct pi_protocol *proto; /* adapter protocol */
int port; /* base address of parallel port */
int mode; /* transfer mode in use */
int delay; /* adapter delay setting */
int devtype; /* dummy for paride protocol modules */
char *device; /* dummy for paride protocol modules */
int unit; /* unit number for chained adapters */
int saved_r0; /* saved port state */
int saved_r2; /* saved port state */
unsigned long private; /* for protocol module */
struct pardevice *pardev; /* pointer to pardevice */
};
typedef struct pi_adapter PIA; /* for paride protocol modules */
/* registers are addressed as (cont,regr)
* cont: 0 for command register file, 1 for control register(s)
* regr: 0-7 for register number.
*/
/* macros and functions exported to the protocol modules */
#define delay_p (pi->delay ? udelay(pi->delay) : (void)0)
#define out_p(offs, byte) do { outb(byte, pi->port + offs); delay_p; } while (0)
#define in_p(offs) (delay_p, inb(pi->port + offs))
#define w0(byte) out_p(0, byte)
#define r0() in_p(0)
#define w1(byte) out_p(1, byte)
#define r1() in_p(1)
#define w2(byte) out_p(2, byte)
#define r2() in_p(2)
#define w3(byte) out_p(3, byte)
#define w4(byte) out_p(4, byte)
#define r4() in_p(4)
#define w4w(data) do { outw(data, pi->port + 4); delay_p; } while (0)
#define w4l(data) do { outl(data, pi->port + 4); delay_p; } while (0)
#define r4w() (delay_p, inw(pi->port + 4))
#define r4l() (delay_p, inl(pi->port + 4))
static inline u16 pi_swab16(char *b, int k)
{
union { u16 u; char t[2]; } r;
r.t[0] = b[2 * k + 1]; r.t[1] = b[2 * k];
return r.u;
}
static inline u32 pi_swab32(char *b, int k)
{
union { u32 u; char f[4]; } r;
r.f[0] = b[4 * k + 1]; r.f[1] = b[4 * k];
r.f[2] = b[4 * k + 3]; r.f[3] = b[4 * k + 2];
return r.u;
}
struct pi_protocol {
char name[8];
int max_mode;
int epp_first; /* modes >= this use 8 ports */
int default_delay;
int max_units; /* max chained units probed for */
void (*write_regr)(struct pi_adapter *pi, int cont, int regr, int val);
int (*read_regr)(struct pi_adapter *pi, int cont, int regr);
void (*write_block)(struct pi_adapter *pi, char *buf, int count);
void (*read_block)(struct pi_adapter *pi, char *buf, int count);
void (*connect)(struct pi_adapter *pi);
void (*disconnect)(struct pi_adapter *pi);
int (*test_port)(struct pi_adapter *pi);
int (*probe_unit)(struct pi_adapter *pi);
int (*test_proto)(struct pi_adapter *pi, char *scratch, int verbose);
void (*log_adapter)(struct pi_adapter *pi, char *scratch, int verbose);
int (*init_proto)(struct pi_adapter *pi);
void (*release_proto)(struct pi_adapter *pi);
struct module *owner;
struct device_driver driver;
struct scsi_host_template sht;
};
#define PATA_PARPORT_SHT ATA_PIO_SHT
int pata_parport_register_driver(struct pi_protocol *pr);
void pata_parport_unregister_driver(struct pi_protocol *pr);
/* defines for old paride protocol modules */
#define paride_register pata_parport_register_driver
#define paride_unregister pata_parport_unregister_driver
#endif /* LINUX_PATA_PARPORT_H */
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