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1da177e4 LT |
1 | /* |
2 | * $Id: proc.c,v 1.1.2.1 1998/06/07 23:21:01 geert Exp $ | |
3 | * | |
4 | * Procfs interface for the Zorro bus. | |
5 | * | |
6 | * Copyright (C) 1998-2003 Geert Uytterhoeven | |
7 | * | |
8 | * Heavily based on the procfs interface for the PCI bus, which is | |
9 | * | |
10 | * Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
11 | */ | |
12 | ||
13 | #include <linux/types.h> | |
14 | #include <linux/zorro.h> | |
15 | #include <linux/proc_fs.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/smp_lock.h> | |
18 | #include <asm/uaccess.h> | |
19 | #include <asm/amigahw.h> | |
20 | #include <asm/setup.h> | |
21 | ||
22 | static loff_t | |
23 | proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) | |
24 | { | |
25 | loff_t new = -1; | |
26 | ||
27 | lock_kernel(); | |
28 | switch (whence) { | |
29 | case 0: | |
30 | new = off; | |
31 | break; | |
32 | case 1: | |
33 | new = file->f_pos + off; | |
34 | break; | |
35 | case 2: | |
36 | new = sizeof(struct ConfigDev) + off; | |
37 | break; | |
38 | } | |
39 | if (new < 0 || new > sizeof(struct ConfigDev)) { | |
40 | unlock_kernel(); | |
41 | return -EINVAL; | |
42 | } | |
43 | unlock_kernel(); | |
44 | return (file->f_pos = new); | |
45 | } | |
46 | ||
47 | static ssize_t | |
d998265f | 48 | proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) |
1da177e4 LT |
49 | { |
50 | struct inode *ino = file->f_dentry->d_inode; | |
51 | struct proc_dir_entry *dp = PDE(ino); | |
52 | struct zorro_dev *z = dp->data; | |
53 | struct ConfigDev cd; | |
54 | loff_t pos = *ppos; | |
55 | ||
56 | if (pos >= sizeof(struct ConfigDev)) | |
57 | return 0; | |
58 | if (nbytes >= sizeof(struct ConfigDev)) | |
59 | nbytes = sizeof(struct ConfigDev); | |
60 | if (pos + nbytes > sizeof(struct ConfigDev)) | |
61 | nbytes = sizeof(struct ConfigDev) - pos; | |
62 | ||
63 | /* Construct a ConfigDev */ | |
64 | memset(&cd, 0, sizeof(cd)); | |
65 | cd.cd_Rom = z->rom; | |
66 | cd.cd_SlotAddr = z->slotaddr; | |
67 | cd.cd_SlotSize = z->slotsize; | |
68 | cd.cd_BoardAddr = (void *)zorro_resource_start(z); | |
69 | cd.cd_BoardSize = zorro_resource_len(z); | |
70 | ||
71 | if (copy_to_user(buf, &cd, nbytes)) | |
72 | return -EFAULT; | |
73 | *ppos += nbytes; | |
74 | ||
75 | return nbytes; | |
76 | } | |
77 | ||
78 | static struct file_operations proc_bus_zorro_operations = { | |
79 | .llseek = proc_bus_zorro_lseek, | |
80 | .read = proc_bus_zorro_read, | |
81 | }; | |
82 | ||
83 | static int | |
84 | get_zorro_dev_info(char *buf, char **start, off_t pos, int count) | |
85 | { | |
86 | u_int slot; | |
87 | off_t at = 0; | |
88 | int len, cnt; | |
89 | ||
90 | for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) { | |
91 | struct zorro_dev *z = &zorro_autocon[slot]; | |
92 | len = sprintf(buf, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, | |
93 | z->id, zorro_resource_start(z), | |
94 | zorro_resource_len(z), z->rom.er_Type); | |
95 | at += len; | |
96 | if (at >= pos) { | |
97 | if (!*start) { | |
98 | *start = buf + (pos - (at - len)); | |
99 | cnt = at - pos; | |
100 | } else | |
101 | cnt += len; | |
102 | buf += len; | |
103 | } | |
104 | } | |
105 | return (count > cnt) ? cnt : count; | |
106 | } | |
107 | ||
108 | static struct proc_dir_entry *proc_bus_zorro_dir; | |
109 | ||
110 | static int __init zorro_proc_attach_device(u_int slot) | |
111 | { | |
112 | struct proc_dir_entry *entry; | |
113 | char name[4]; | |
114 | ||
115 | sprintf(name, "%02x", slot); | |
116 | entry = create_proc_entry(name, 0, proc_bus_zorro_dir); | |
117 | if (!entry) | |
118 | return -ENOMEM; | |
119 | entry->proc_fops = &proc_bus_zorro_operations; | |
120 | entry->data = &zorro_autocon[slot]; | |
121 | entry->size = sizeof(struct zorro_dev); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int __init zorro_proc_init(void) | |
126 | { | |
127 | u_int slot; | |
128 | ||
129 | if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) { | |
130 | proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus); | |
131 | create_proc_info_entry("devices", 0, proc_bus_zorro_dir, | |
132 | get_zorro_dev_info); | |
133 | for (slot = 0; slot < zorro_num_autocon; slot++) | |
134 | zorro_proc_attach_device(slot); | |
135 | } | |
136 | return 0; | |
137 | } | |
138 | ||
139 | __initcall(zorro_proc_init); |