File: /usr/src/linux/drivers/zorro/proc.c
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) 1998-2000 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 <asm/uaccess.h>
18 #include <asm/amigahw.h>
19 #include <asm/setup.h>
20
21 static loff_t
22 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
23 {
24 loff_t new;
25
26 switch (whence) {
27 case 0:
28 new = off;
29 break;
30 case 1:
31 new = file->f_pos + off;
32 break;
33 case 2:
34 new = sizeof(struct ConfigDev) + off;
35 break;
36 default:
37 return -EINVAL;
38 }
39 if (new < 0 || new > sizeof(struct ConfigDev))
40 return -EINVAL;
41 return (file->f_pos = new);
42 }
43
44 static ssize_t
45 proc_bus_zorro_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
46 {
47 struct inode *ino = file->f_dentry->d_inode;
48 struct proc_dir_entry *dp = ino->u.generic_ip;
49 struct zorro_dev *dev = dp->data;
50 struct ConfigDev cd;
51 int pos = *ppos;
52
53 if (pos >= sizeof(struct ConfigDev))
54 return 0;
55 if (nbytes >= sizeof(struct ConfigDev))
56 nbytes = sizeof(struct ConfigDev);
57 if (pos + nbytes > sizeof(struct ConfigDev))
58 nbytes = sizeof(struct ConfigDev) - pos;
59
60 /* Construct a ConfigDev */
61 memset(&cd, 0, sizeof(cd));
62 cd.cd_Rom = dev->rom;
63 cd.cd_SlotAddr = dev->slotaddr;
64 cd.cd_SlotSize = dev->slotsize;
65 cd.cd_BoardAddr = (void *)dev->resource.start;
66 cd.cd_BoardSize = dev->resource.end-dev->resource.start+1;
67
68 if (copy_to_user(buf, &cd, nbytes))
69 return -EFAULT;
70 *ppos += nbytes;
71
72 return nbytes;
73 }
74
75 static struct file_operations proc_bus_zorro_operations = {
76 llseek: proc_bus_zorro_lseek,
77 read: proc_bus_zorro_read,
78 };
79
80 static int
81 get_zorro_dev_info(char *buf, char **start, off_t pos, int count)
82 {
83 u_int slot;
84 off_t at = 0;
85 int len, cnt;
86
87 for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) {
88 struct zorro_dev *dev = &zorro_autocon[slot];
89 len = sprintf(buf, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot,
90 dev->id, dev->resource.start,
91 dev->resource.end-dev->resource.start+1,
92 dev->rom.er_Type);
93 at += len;
94 if (at >= pos) {
95 if (!*start) {
96 *start = buf + (pos - (at - len));
97 cnt = at - pos;
98 } else
99 cnt += len;
100 buf += len;
101 }
102 }
103 return (count > cnt) ? cnt : count;
104 }
105
106 static struct proc_dir_entry *proc_bus_zorro_dir;
107
108 static int __init zorro_proc_attach_device(u_int slot)
109 {
110 struct proc_dir_entry *entry;
111 char name[4];
112
113 sprintf(name, "%02x", slot);
114 entry = create_proc_entry(name, 0, proc_bus_zorro_dir);
115 if (!entry)
116 return -ENOMEM;
117 entry->proc_fops = &proc_bus_zorro_operations;
118 entry->data = &zorro_autocon[slot];
119 entry->size = sizeof(struct zorro_dev);
120 return 0;
121 }
122
123 static int __init zorro_proc_init(void)
124 {
125 u_int slot;
126
127 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
128 proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus);
129 create_proc_info_entry("devices", 0, proc_bus_zorro_dir,
130 get_zorro_dev_info);
131 for (slot = 0; slot < zorro_num_autocon; slot++)
132 zorro_proc_attach_device(slot);
133 }
134 return 0;
135 }
136
137 __initcall(zorro_proc_init);
138