/* SPDX-License-Identifier: GPL-2.0 */
/*
nubus.h: various definitions and prototypes for NuBus drivers to use.
Originally written by Alan Cox.
Hacked to death by C. Scott Ananian and David Huggins-Daines.
*/
#ifndef LINUX_NUBUS_H
#define LINUX_NUBUS_H
#include <asm/nubus.h>
#include <uapi/linux/nubus.h>
struct proc_dir_entry;
struct seq_file;
struct nubus_dir {
unsigned char *base;
unsigned char *ptr;
int done;
int mask;
struct proc_dir_entry *procdir;
};
struct nubus_dirent {
unsigned char *base;
unsigned char type;
__u32 data; /* Actually 24 bits used */
int mask;
};
struct nubus_board {
struct nubus_board *next;
struct nubus_dev *first_dev;
/* Only 9-E actually exist, though 0-8 are also theoretically
possible, and 0 is a special case which represents the
motherboard and onboard peripherals (Ethernet, video) */
int slot;
/* For slot 0, this is bogus. */
char name[64];
/* Format block */
unsigned char *fblock;
/* Root directory (does *not* always equal fblock + doffset!) */
unsigned char *directory;
unsigned long slot_addr;
/* Offset to root directory (sometimes) */
unsigned long doffset;
/* Length over which to compute the crc */
unsigned long rom_length;
/* Completely useless most of the time */
unsigned long crc;
unsigned char rev;
unsigned char format;
unsigned char lanes;
/* Directory entry in /proc/bus/nubus */
struct proc_dir_entry *procdir;
};
struct nubus_dev {
/* Next link in device list */
struct nubus_dev *next;
/* The functional resource ID of this device */
unsigned char resid;
/* These are mostly here for convenience; we could always read
them from the ROMs if we wanted to */
unsigned short category;
unsigned short type;
unsigned short dr_sw;
unsigned short dr_hw;
/* Functional directory */
unsigned char *directory;
/* Much of our info comes from here */
struct nubus_board *board;
};
/* This is all NuBus devices (used to find devices later on) */
extern struct nubus_dev *nubus_devices;
/* This is all NuBus cards */
extern struct nubus_board *nubus_boards;
/* Generic NuBus interface functions, modelled after the PCI interface */
#ifdef CONFIG_PROC_FS
void nubus_proc_init(void);
struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board);
struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent,
struct nubus_board *board);
void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent,
unsigned int size);
void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent);
#else
static inline void nubus_proc_init(void) {}
static inline
struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
{ return NULL; }
static inline
struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent,
struct nubus_board *board)
{ return NULL; }
static inline void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent,
unsigned int size) {}
static inline void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
const struct nubus_dirent *ent) {}
#endif
/* If we need more precision we can add some more of these */
struct nubus_dev *nubus_find_type(unsigned short category,
unsigned short type,
const struct nubus_dev *from);
/* Might have more than one device in a slot, you know... */
struct nubus_dev *nubus_find_slot(unsigned int slot,
const struct nubus_dev *from);
/* These are somewhat more NuBus-specific. They all return 0 for
success and -1 for failure, as you'd expect. */
/* The root directory which contains the board and functional
directories */
int nubus_get_root_dir(const struct nubus_board *board,
struct nubus_dir *dir);
/* The board directory */
int nubus_get_board_dir(const struct nubus_board *board,
struct nubus_dir *dir);
/* The functional directory */
int nubus_get_func_dir(const struct nubus_dev *dev,
struct nubus_dir *dir);
/* These work on any directory gotten via the above */
int nubus_readdir(struct nubus_dir *dir,
struct nubus_dirent *ent);
int nubus_find_rsrc(struct nubus_dir *dir,
unsigned char rsrc_type,
struct nubus_dirent *ent);
int nubus_rewinddir(struct nubus_dir *dir);
/* Things to do with directory entries */
int nubus_get_subdir(const struct nubus_dirent *ent,
struct nubus_dir *dir);
void nubus_get_rsrc_mem(void *dest, const struct nubus_dirent *dirent,
unsigned int len);
unsigned int nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
unsigned int len);
void nubus_seq_write_rsrc_mem(struct seq_file *m,
const struct nubus_dirent *dirent,
unsigned int len);
unsigned char *nubus_dirptr(const struct nubus_dirent *nd);
/* Returns a pointer to the "standard" slot space. */
static inline void *nubus_slot_addr(int slot)
{
return (void *)(0xF0000000 | (slot << 24));
}
#endif /* LINUX_NUBUS_H */
