aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/zorro/proc.c
blob: 2ce4cebc31d9d47e6465783a0fd11b06082ee7e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
 *	$Id: proc.c,v 1.1.2.1 1998/06/07 23:21:01 geert Exp $
 *
 *	Procfs interface for the Zorro bus.
 *
 *	Copyright (C) 1998-2003 Geert Uytterhoeven
 *
 *	Heavily based on the procfs interface for the PCI bus, which is
 *
 *	Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
 */

#include <linux/types.h>
#include <linux/zorro.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <asm/amigahw.h>
#include <asm/setup.h>

static loff_t
proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
{
	loff_t new = -1;

	lock_kernel();
	switch (whence) {
	case 0:
		new = off;
		break;
	case 1:
		new = file->f_pos + off;
		break;
	case 2:
		new = sizeof(struct ConfigDev) + off;
		break;
	}
	if (new < 0 || new > sizeof(struct ConfigDev)) {
		unlock_kernel();
		return -EINVAL;
	}
	unlock_kernel();
	return (file->f_pos = new);
}

static ssize_t
proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
{
	struct inode *ino = file->f_path.dentry->d_inode;
	struct proc_dir_entry *dp = PDE(ino);
	struct zorro_dev *z = dp->data;
	struct ConfigDev cd;
	loff_t pos = *ppos;

	if (pos >= sizeof(struct ConfigDev))
		return 0;
	if (nbytes >= sizeof(struct ConfigDev))
		nbytes = sizeof(struct ConfigDev);
	if (pos + nbytes > sizeof(struct ConfigDev))
		nbytes = sizeof(struct ConfigDev) - pos;

	/* Construct a ConfigDev */
	memset(&cd, 0, sizeof(cd));
	cd.cd_Rom = z->rom;
	cd.cd_SlotAddr = z->slotaddr;
	cd.cd_SlotSize = z->slotsize;
	cd.cd_BoardAddr = (void *)zorro_resource_start(z);
	cd.cd_BoardSize = zorro_resource_len(z);

	if (copy_to_user(buf, &cd, nbytes))
		return -EFAULT;
	*ppos += nbytes;

	return nbytes;
}

static const struct file_operations proc_bus_zorro_operations = {
	.llseek		= proc_bus_zorro_lseek,
	.read		= proc_bus_zorro_read,
};

static int
get_zorro_dev_info(char *buf, char **start, off_t pos, int count)
{
	u_int slot;
	off_t at = 0;
	int len, cnt;

	for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) {
		struct zorro_dev *z = &zorro_autocon[slot];
		len = sprintf(buf, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot,
			      z->id, (unsigned long)zorro_resource_start(z),
			      (unsigned long)zorro_resource_len(z),
			      z->rom.er_Type);
		at += len;
		if (at >= pos) {
			if (!*start) {
				*start = buf + (pos - (at - len));
				cnt = at - pos;
			} else
				cnt += len;
			buf += len;
		}
	}
	return (count > cnt) ? cnt : count;
}

static struct proc_dir_entry *proc_bus_zorro_dir;

static int __init zorro_proc_attach_device(u_int slot)
{
	struct proc_dir_entry *entry;
	char name[4];

	sprintf(name, "%02x", slot);
	entry = create_proc_entry(name, 0, proc_bus_zorro_dir);
	if (!entry)
		return -ENOMEM;
	entry->proc_fops = &proc_bus_zorro_operations;
	entry->data = &zorro_autocon[slot];
	entry->size = sizeof(struct zorro_dev);
	return 0;
}

static int __init zorro_proc_init(void)
{
	u_int slot;

	if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
		proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus);
		create_proc_info_entry("devices", 0, proc_bus_zorro_dir,
				       get_zorro_dev_info);
		for (slot = 0; slot < zorro_num_autocon; slot++)
			zorro_proc_attach_device(slot);
	}
	return 0;
}

__initcall(zorro_proc_init);