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1/*
2 nubus.h: various definitions and prototypes for NuBus drivers to use.
3
4 Originally written by Alan Cox.
5
6 Hacked to death by C. Scott Ananian and David Huggins-Daines.
7
8 Some of the constants in here are from the corresponding
9 NetBSD/OpenBSD header file, by Allen Briggs. We figured out the
10 rest of them on our own. */
11#ifndef LINUX_NUBUS_H
12#define LINUX_NUBUS_H
13
14#include <asm/nubus.h>
15#include <uapi/linux/nubus.h>
16
17struct nubus_board {
18 struct nubus_board* next;
19 struct nubus_dev* first_dev;
20
21 /* Only 9-E actually exist, though 0-8 are also theoretically
22 possible, and 0 is a special case which represents the
23 motherboard and onboard peripherals (Ethernet, video) */
24 int slot;
25 /* For slot 0, this is bogus. */
26 char name[64];
27
28 /* Format block */
29 unsigned char* fblock;
30 /* Root directory (does *not* always equal fblock + doffset!) */
31 unsigned char* directory;
32
33 unsigned long slot_addr;
34 /* Offset to root directory (sometimes) */
35 unsigned long doffset;
36 /* Length over which to compute the crc */
37 unsigned long rom_length;
38 /* Completely useless most of the time */
39 unsigned long crc;
40 unsigned char rev;
41 unsigned char format;
42 unsigned char lanes;
43};
44
45struct nubus_dev {
46 /* Next link in device list */
47 struct nubus_dev* next;
48 /* Directory entry in /proc/bus/nubus */
49 struct proc_dir_entry* procdir;
50
51 /* The functional resource ID of this device */
52 unsigned char resid;
53 /* These are mostly here for convenience; we could always read
54 them from the ROMs if we wanted to */
55 unsigned short category;
56 unsigned short type;
57 unsigned short dr_sw;
58 unsigned short dr_hw;
59 /* This is the device's name rather than the board's.
60 Sometimes they are different. Usually the board name is
61 more correct. */
62 char name[64];
63 /* MacOS driver (I kid you not) */
64 unsigned char* driver;
65 /* Actually this is an offset */
66 unsigned long iobase;
67 unsigned long iosize;
68 unsigned char flags, hwdevid;
69
70 /* Functional directory */
71 unsigned char* directory;
72 /* Much of our info comes from here */
73 struct nubus_board* board;
74};
75
76/* This is all NuBus devices (used to find devices later on) */
77extern struct nubus_dev* nubus_devices;
78/* This is all NuBus cards */
79extern struct nubus_board* nubus_boards;
80
81/* Generic NuBus interface functions, modelled after the PCI interface */
82void nubus_scan_bus(void);
83extern void nubus_proc_init(void);
84int get_nubus_list(char *buf);
85int nubus_proc_attach_device(struct nubus_dev *dev);
86int nubus_proc_detach_device(struct nubus_dev *dev);
87/* If we need more precision we can add some more of these */
88struct nubus_dev* nubus_find_device(unsigned short category,
89 unsigned short type,
90 unsigned short dr_hw,
91 unsigned short dr_sw,
92 const struct nubus_dev* from);
93struct nubus_dev* nubus_find_type(unsigned short category,
94 unsigned short type,
95 const struct nubus_dev* from);
96/* Might have more than one device in a slot, you know... */
97struct nubus_dev* nubus_find_slot(unsigned int slot,
98 const struct nubus_dev* from);
99
100/* These are somewhat more NuBus-specific. They all return 0 for
101 success and -1 for failure, as you'd expect. */
102
103/* The root directory which contains the board and functional
104 directories */
105int nubus_get_root_dir(const struct nubus_board* board,
106 struct nubus_dir* dir);
107/* The board directory */
108int nubus_get_board_dir(const struct nubus_board* board,
109 struct nubus_dir* dir);
110/* The functional directory */
111int nubus_get_func_dir(const struct nubus_dev* dev,
112 struct nubus_dir* dir);
113
114/* These work on any directory gotten via the above */
115int nubus_readdir(struct nubus_dir* dir,
116 struct nubus_dirent* ent);
117int nubus_find_rsrc(struct nubus_dir* dir,
118 unsigned char rsrc_type,
119 struct nubus_dirent* ent);
120int nubus_rewinddir(struct nubus_dir* dir);
121
122/* Things to do with directory entries */
123int nubus_get_subdir(const struct nubus_dirent* ent,
124 struct nubus_dir* dir);
125void nubus_get_rsrc_mem(void* dest,
126 const struct nubus_dirent *dirent,
127 int len);
128void nubus_get_rsrc_str(void* dest,
129 const struct nubus_dirent *dirent,
130 int maxlen);
131#endif /* LINUX_NUBUS_H */