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Added a generalised ISA device-probing mechanism.

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This commit is contained in:
Michael Brown
2005-04-14 18:46:43 +00:00
parent e5b537fed0
commit 9eac705dd2
2 changed files with 190 additions and 16 deletions
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83
src/include/isa.h
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@@ -2,27 +2,78 @@
#define ISA_H
#include "isa_ids.h"
#include "dev.h"
struct dev;
struct isa_driver
{
int type;
const char *name;
int (*probe)(struct dev *, unsigned short *);
unsigned short *ioaddrs;
/*
* A physical ISA device
*
*/
struct isa_device {
char *magic; /* must be first */
unsigned int probe_idx;
uint16_t ioaddr;
int already_tried;
};
#ifndef __HYPERSTONE__
#define __isa_driver __attribute__ ((used,__section__(".drivers.isa")))
#else
#define __isa_driver __attribute__ ((used,__section__(".drivisa")))
#endif
/*
* An individual ISA device, identified by probe address
*
*/
struct isa_probe_addr {
uint16_t addr;
} __attribute__ (( packed ));
extern const struct isa_driver isa_drivers[];
extern const struct isa_driver isa_drivers_end[];
/*
* An ISA driver, with a probe address list and a probe_addr method.
* probe_addr() should return 1 if a card is physically present,
* leaving the other operations (read MAC address etc.) down to the
* main probe() routine.
*
*/
struct isa_driver {
const char *name;
struct isa_probe_addr *probe_addrs;
unsigned int addr_count;
int ( * probe_addr ) ( uint16_t addr );
uint16_t mfg_id;
uint16_t prod_id;
};
#define ISA_ROM(IMAGE, DESCRIPTION)
/*
* Define an ISA driver
*
*/
#define ISA_DRIVER( _name, _probe_addrs, _probe_addr, _mfg_id, _prod_id ) { \
.name = _name, \
.probe_addrs = _probe_addrs, \
.addr_count = sizeof ( _probe_addrs ) / sizeof ( probe_addrs[0] ), \
.probe_addr = _probe_addr, \
.mfg_id = _mfg_id, \
.prod_id = _prod_id, \
}
/*
* ISA_ROM is parsed by parserom.pl to generate Makefile rules and
* files for rom-o-matic.
*
*/
#define ISA_ROM( IMAGE, DESCRIPTION )
/*
* Functions in isa.c
*
*/
extern int find_isa_device ( struct isa_device *eisa,
struct isa_driver *driver );
extern int find_isa_boot_device ( struct dev *dev,
struct isa_driver *driver );
/*
* config.c defines isa_extra_probe_addrs and isa_extra_probe_addr_count.
*
*/
extern struct isa_probe_addr isa_extra_probe_addrs[];
extern unsigned int isa_extra_probe_addr_count;
#endif /* ISA_H */