1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 nubus.h: various definitions and prototypes for NuBus drivers to use.
4
5 Originally written by Alan Cox.
6
7 Hacked to death by C. Scott Ananian and David Huggins-Daines.
8 */
9
10 #ifndef LINUX_NUBUS_H
11 #define LINUX_NUBUS_H
12
13 #include <linux/device.h>
14 #include <asm/nubus.h>
15 #include <uapi/linux/nubus.h>
16
17 struct proc_dir_entry;
18 struct seq_file;
19
20 struct nubus_dir {
21 unsigned char *base;
22 unsigned char *ptr;
23 int done;
24 int mask;
25 struct proc_dir_entry *procdir;
26 };
27
28 struct nubus_dirent {
29 unsigned char *base;
30 unsigned char type;
31 __u32 data; /* Actually 24 bits used */
32 int mask;
33 };
34
35 struct nubus_board {
36 struct device dev;
37
38 /* Only 9-E actually exist, though 0-8 are also theoretically
39 possible, and 0 is a special case which represents the
40 motherboard and onboard peripherals (Ethernet, video) */
41 int slot;
42 /* For slot 0, this is bogus. */
43 char name[64];
44
45 /* Format block */
46 unsigned char *fblock;
47 /* Root directory (does *not* always equal fblock + doffset!) */
48 unsigned char *directory;
49
50 unsigned long slot_addr;
51 /* Offset to root directory (sometimes) */
52 unsigned long doffset;
53 /* Length over which to compute the crc */
54 unsigned long rom_length;
55 /* Completely useless most of the time */
56 unsigned long crc;
57 unsigned char rev;
58 unsigned char format;
59 unsigned char lanes;
60
61 /* Directory entry in /proc/bus/nubus */
62 struct proc_dir_entry *procdir;
63 };
64
65 struct nubus_rsrc {
66 struct list_head list;
67
68 /* The functional resource ID */
69 unsigned char resid;
70 /* These are mostly here for convenience; we could always read
71 them from the ROMs if we wanted to */
72 unsigned short category;
73 unsigned short type;
74 unsigned short dr_sw;
75 unsigned short dr_hw;
76
77 /* Functional directory */
78 unsigned char *directory;
79 /* Much of our info comes from here */
80 struct nubus_board *board;
81 };
82
83 /* This is all NuBus functional resources (used to find devices later on) */
84 extern struct list_head nubus_func_rsrcs;
85
86 struct nubus_driver {
87 struct device_driver driver;
88 int (*probe)(struct nubus_board *board);
89 void (*remove)(struct nubus_board *board);
90 };
91
92 extern struct bus_type nubus_bus_type;
93
94 /* Generic NuBus interface functions, modelled after the PCI interface */
95 #ifdef CONFIG_PROC_FS
96 extern bool nubus_populate_procfs;
97 void nubus_proc_init(void);
98 struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board);
99 struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
100 const struct nubus_dirent *ent,
101 struct nubus_board *board);
102 void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
103 const struct nubus_dirent *ent,
104 unsigned int size);
105 void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
106 const struct nubus_dirent *ent);
107 #else
nubus_proc_init(void)108 static inline void nubus_proc_init(void) {}
109 static inline
nubus_proc_add_board(struct nubus_board * board)110 struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
111 { return NULL; }
112 static inline
nubus_proc_add_rsrc_dir(struct proc_dir_entry * procdir,const struct nubus_dirent * ent,struct nubus_board * board)113 struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
114 const struct nubus_dirent *ent,
115 struct nubus_board *board)
116 { return NULL; }
nubus_proc_add_rsrc_mem(struct proc_dir_entry * procdir,const struct nubus_dirent * ent,unsigned int size)117 static inline void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
118 const struct nubus_dirent *ent,
119 unsigned int size) {}
nubus_proc_add_rsrc(struct proc_dir_entry * procdir,const struct nubus_dirent * ent)120 static inline void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
121 const struct nubus_dirent *ent) {}
122 #endif
123
124 struct nubus_rsrc *nubus_first_rsrc_or_null(void);
125 struct nubus_rsrc *nubus_next_rsrc_or_null(struct nubus_rsrc *from);
126
127 #define for_each_func_rsrc(f) \
128 for (f = nubus_first_rsrc_or_null(); f; f = nubus_next_rsrc_or_null(f))
129
130 #define for_each_board_func_rsrc(b, f) \
131 for_each_func_rsrc(f) if (f->board != b) {} else
132
133 /* These are somewhat more NuBus-specific. They all return 0 for
134 success and -1 for failure, as you'd expect. */
135
136 /* The root directory which contains the board and functional
137 directories */
138 int nubus_get_root_dir(const struct nubus_board *board,
139 struct nubus_dir *dir);
140 /* The board directory */
141 int nubus_get_board_dir(const struct nubus_board *board,
142 struct nubus_dir *dir);
143 /* The functional directory */
144 int nubus_get_func_dir(const struct nubus_rsrc *fres, struct nubus_dir *dir);
145
146 /* These work on any directory gotten via the above */
147 int nubus_readdir(struct nubus_dir *dir,
148 struct nubus_dirent *ent);
149 int nubus_find_rsrc(struct nubus_dir *dir,
150 unsigned char rsrc_type,
151 struct nubus_dirent *ent);
152 int nubus_rewinddir(struct nubus_dir *dir);
153
154 /* Things to do with directory entries */
155 int nubus_get_subdir(const struct nubus_dirent *ent,
156 struct nubus_dir *dir);
157 void nubus_get_rsrc_mem(void *dest, const struct nubus_dirent *dirent,
158 unsigned int len);
159 unsigned int nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
160 unsigned int len);
161 void nubus_seq_write_rsrc_mem(struct seq_file *m,
162 const struct nubus_dirent *dirent,
163 unsigned int len);
164 unsigned char *nubus_dirptr(const struct nubus_dirent *nd);
165
166 /* Declarations relating to driver model objects */
167 int nubus_parent_device_register(void);
168 int nubus_device_register(struct nubus_board *board);
169 int nubus_driver_register(struct nubus_driver *ndrv);
170 void nubus_driver_unregister(struct nubus_driver *ndrv);
171 int nubus_proc_show(struct seq_file *m, void *data);
172
nubus_set_drvdata(struct nubus_board * board,void * data)173 static inline void nubus_set_drvdata(struct nubus_board *board, void *data)
174 {
175 dev_set_drvdata(&board->dev, data);
176 }
177
nubus_get_drvdata(struct nubus_board * board)178 static inline void *nubus_get_drvdata(struct nubus_board *board)
179 {
180 return dev_get_drvdata(&board->dev);
181 }
182
183 /* Returns a pointer to the "standard" slot space. */
nubus_slot_addr(int slot)184 static inline void *nubus_slot_addr(int slot)
185 {
186 return (void *)(0xF0000000 | (slot << 24));
187 }
188
189 #endif /* LINUX_NUBUS_H */
190
