136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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nubus.h: various definitions and prototypes for NuBus drivers to use.
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Originally written by Alan Cox.
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Hacked to death by C. Scott Ananian and David Huggins-Daines.
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Some of the constants in here are from the corresponding
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NetBSD/OpenBSD header file, by Allen Briggs. We figured out the
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rest of them on our own. */
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#ifndef LINUX_NUBUS_H
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#define LINUX_NUBUS_H
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#include <asm/nubus.h>
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#include <uapi/linux/nubus.h>
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struct nubus_board {
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struct nubus_board* next;
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struct nubus_dev* first_dev;
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/* Only 9-E actually exist, though 0-8 are also theoretically
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possible, and 0 is a special case which represents the
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motherboard and onboard peripherals (Ethernet, video) */
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int slot;
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/* For slot 0, this is bogus. */
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char name[64];
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/* Format block */
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unsigned char* fblock;
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/* Root directory (does *not* always equal fblock + doffset!) */
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unsigned char* directory;
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unsigned long slot_addr;
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/* Offset to root directory (sometimes) */
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unsigned long doffset;
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/* Length over which to compute the crc */
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unsigned long rom_length;
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/* Completely useless most of the time */
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unsigned long crc;
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unsigned char rev;
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unsigned char format;
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unsigned char lanes;
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};
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struct nubus_dev {
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/* Next link in device list */
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struct nubus_dev* next;
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/* Directory entry in /proc/bus/nubus */
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struct proc_dir_entry* procdir;
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/* The functional resource ID of this device */
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unsigned char resid;
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/* These are mostly here for convenience; we could always read
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them from the ROMs if we wanted to */
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unsigned short category;
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unsigned short type;
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unsigned short dr_sw;
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unsigned short dr_hw;
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/* This is the device's name rather than the board's.
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Sometimes they are different. Usually the board name is
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more correct. */
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char name[64];
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/* MacOS driver (I kid you not) */
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unsigned char* driver;
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/* Actually this is an offset */
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unsigned long iobase;
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unsigned long iosize;
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unsigned char flags, hwdevid;
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/* Functional directory */
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unsigned char* directory;
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/* Much of our info comes from here */
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struct nubus_board* board;
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};
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/* This is all NuBus devices (used to find devices later on) */
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extern struct nubus_dev* nubus_devices;
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/* This is all NuBus cards */
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extern struct nubus_board* nubus_boards;
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/* Generic NuBus interface functions, modelled after the PCI interface */
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void nubus_scan_bus(void);
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#ifdef CONFIG_PROC_FS
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extern void nubus_proc_init(void);
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#else
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static inline void nubus_proc_init(void) {}
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#endif
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int get_nubus_list(char *buf);
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int nubus_proc_attach_device(struct nubus_dev *dev);
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/* If we need more precision we can add some more of these */
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struct nubus_dev* nubus_find_device(unsigned short category,
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unsigned short type,
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unsigned short dr_hw,
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unsigned short dr_sw,
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const struct nubus_dev* from);
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struct nubus_dev* nubus_find_type(unsigned short category,
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unsigned short type,
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const struct nubus_dev* from);
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/* Might have more than one device in a slot, you know... */
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struct nubus_dev* nubus_find_slot(unsigned int slot,
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const struct nubus_dev* from);
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/* These are somewhat more NuBus-specific. They all return 0 for
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success and -1 for failure, as you'd expect. */
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/* The root directory which contains the board and functional
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directories */
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int nubus_get_root_dir(const struct nubus_board* board,
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struct nubus_dir* dir);
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/* The board directory */
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int nubus_get_board_dir(const struct nubus_board* board,
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struct nubus_dir* dir);
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/* The functional directory */
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int nubus_get_func_dir(const struct nubus_dev* dev,
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struct nubus_dir* dir);
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/* These work on any directory gotten via the above */
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int nubus_readdir(struct nubus_dir* dir,
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struct nubus_dirent* ent);
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int nubus_find_rsrc(struct nubus_dir* dir,
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unsigned char rsrc_type,
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struct nubus_dirent* ent);
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int nubus_rewinddir(struct nubus_dir* dir);
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/* Things to do with directory entries */
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int nubus_get_subdir(const struct nubus_dirent* ent,
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struct nubus_dir* dir);
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void nubus_get_rsrc_mem(void* dest,
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const struct nubus_dirent *dirent,
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int len);
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void nubus_get_rsrc_str(void* dest,
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const struct nubus_dirent *dirent,
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int maxlen);
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#endif /* LINUX_NUBUS_H */
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