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