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nubus.h
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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 
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 extern void nubus_proc_init(void);
84 int get_nubus_list(char *buf);
85 int nubus_proc_attach_device(struct nubus_dev *dev);
86 int nubus_proc_detach_device(struct nubus_dev *dev);
87 /* If we need more precision we can add some more of these */
88 struct 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);
93 struct 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... */
97 struct 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 */
105 int nubus_get_root_dir(const struct nubus_board* board,
106  struct nubus_dir* dir);
107 /* The board directory */
108 int nubus_get_board_dir(const struct nubus_board* board,
109  struct nubus_dir* dir);
110 /* The functional directory */
111 int 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 */
115 int nubus_readdir(struct nubus_dir* dir,
116  struct nubus_dirent* ent);
117 int nubus_find_rsrc(struct nubus_dir* dir,
118  unsigned char rsrc_type,
119  struct nubus_dirent* ent);
120 int nubus_rewinddir(struct nubus_dir* dir);
121 
122 /* Things to do with directory entries */
123 int nubus_get_subdir(const struct nubus_dirent* ent,
124  struct nubus_dir* dir);
125 void nubus_get_rsrc_mem(void* dest,
126  const struct nubus_dirent *dirent,
127  int len);
128 void nubus_get_rsrc_str(void* dest,
129  const struct nubus_dirent *dirent,
130  int maxlen);
131 #endif /* LINUX_NUBUS_H */
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