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
17 struct 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
45 struct 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) */
77 extern struct nubus_dev* nubus_devices;
78 /* This is all NuBus cards */
79 extern struct nubus_board* nubus_boards;
80
81 /* Generic NuBus interface functions, modelled after the PCI interface */
82 void nubus_scan_bus(void);
83 #ifdef CONFIG_PROC_FS
84 extern void nubus_proc_init(void);
85 #else
nubus_proc_init(void)86 static inline void nubus_proc_init(void) {}
87 #endif
88 int get_nubus_list(char *buf);
89 int nubus_proc_attach_device(struct nubus_dev *dev);
90 /* If we need more precision we can add some more of these */
91 struct nubus_dev* nubus_find_device(unsigned short category,
92 unsigned short type,
93 unsigned short dr_hw,
94 unsigned short dr_sw,
95 const struct nubus_dev* from);
96 struct nubus_dev* nubus_find_type(unsigned short category,
97 unsigned short type,
98 const struct nubus_dev* from);
99 /* Might have more than one device in a slot, you know... */
100 struct nubus_dev* nubus_find_slot(unsigned int slot,
101 const struct nubus_dev* from);
102
103 /* These are somewhat more NuBus-specific. They all return 0 for
104 success and -1 for failure, as you'd expect. */
105
106 /* The root directory which contains the board and functional
107 directories */
108 int nubus_get_root_dir(const struct nubus_board* board,
109 struct nubus_dir* dir);
110 /* The board directory */
111 int nubus_get_board_dir(const struct nubus_board* board,
112 struct nubus_dir* dir);
113 /* The functional directory */
114 int nubus_get_func_dir(const struct nubus_dev* dev,
115 struct nubus_dir* dir);
116
117 /* These work on any directory gotten via the above */
118 int nubus_readdir(struct nubus_dir* dir,
119 struct nubus_dirent* ent);
120 int nubus_find_rsrc(struct nubus_dir* dir,
121 unsigned char rsrc_type,
122 struct nubus_dirent* ent);
123 int nubus_rewinddir(struct nubus_dir* dir);
124
125 /* Things to do with directory entries */
126 int nubus_get_subdir(const struct nubus_dirent* ent,
127 struct nubus_dir* dir);
128 void nubus_get_rsrc_mem(void* dest,
129 const struct nubus_dirent *dirent,
130 int len);
131 void nubus_get_rsrc_str(void* dest,
132 const struct nubus_dirent *dirent,
133 int maxlen);
134 #endif /* LINUX_NUBUS_H */
135