97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/* 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>
|
|
|
|
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 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 */
|
|
};
|
|
|
|
/* 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))
|
|
|
|
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);
|
|
void (*log_adapter)(struct pi_adapter *pi);
|
|
|
|
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);
|
|
|
|
/**
|
|
* module_pata_parport_driver() - Helper macro for registering a pata_parport driver
|
|
* @__pi_protocol: pi_protocol struct
|
|
*
|
|
* Helper macro for pata_parport drivers which do not do anything special in module
|
|
* init/exit. This eliminates a lot of boilerplate. Each module may only
|
|
* use this macro once, and calling it replaces module_init() and module_exit()
|
|
*/
|
|
#define module_pata_parport_driver(__pi_protocol) \
|
|
module_driver(__pi_protocol, pata_parport_register_driver, pata_parport_unregister_driver)
|
|
|
|
#endif /* LINUX_PATA_PARPORT_H */
|