diff options
Diffstat (limited to 'drivers/ata/pata_parport/pata_parport.h')
-rw-r--r-- | drivers/ata/pata_parport/pata_parport.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/ata/pata_parport/pata_parport.h b/drivers/ata/pata_parport/pata_parport.h new file mode 100644 index 0000000000..bbfa4e63ee --- /dev/null +++ b/drivers/ata/pata_parport/pata_parport.h @@ -0,0 +1,96 @@ +/* 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 */ |