projects/linux·blob master · refs

129 lines · 3.1 KiB

1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Procfs interface for the Zorro bus.
4 *
5 * Copyright (C) 1998-2003 Geert Uytterhoeven
6 *
7 * Heavily based on the procfs interface for the PCI bus, which is
8 *
9 * Copyright (C) 1997, 1998 Martin Mares <[email protected]>
10 */
11
12#include <linux/types.h>
13#include <linux/zorro.h>
14#include <linux/proc_fs.h>
15#include <linux/seq_file.h>
16#include <linux/init.h>
17#include <linux/export.h>
18
19#include <asm/byteorder.h>
20#include <linux/uaccess.h>
21#include <asm/amigahw.h>
22#include <asm/setup.h>
23
24static loff_t
25proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
26{
27 return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));
28}
29
30static ssize_t
31proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
32{
33 struct zorro_dev *z = pde_data(file_inode(file));
34 struct ConfigDev cd;
35 loff_t pos = *ppos;
36
37 if (pos >= sizeof(struct ConfigDev))
38 return 0;
39 if (nbytes >= sizeof(struct ConfigDev))
40 nbytes = sizeof(struct ConfigDev);
41 if (pos + nbytes > sizeof(struct ConfigDev))
42 nbytes = sizeof(struct ConfigDev) - pos;
43
44 /* Construct a ConfigDev */
45 memset(&cd, 0, sizeof(cd));
46 cd.cd_Rom = z->rom;
47 cd.cd_SlotAddr = cpu_to_be16(z->slotaddr);
48 cd.cd_SlotSize = cpu_to_be16(z->slotsize);
49 cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));
50 cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));
51
52 if (copy_to_user(buf, (void *)&cd + pos, nbytes))
53 return -EFAULT;
54 *ppos += nbytes;
55
56 return nbytes;
57}
58
59static const struct proc_ops bus_zorro_proc_ops = {
60 .proc_lseek = proc_bus_zorro_lseek,
61 .proc_read = proc_bus_zorro_read,
62};
63
64static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
65{
66 return (*pos < zorro_num_autocon) ? pos : NULL;
67}
68
69static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
70{
71 (*pos)++;
72 return (*pos < zorro_num_autocon) ? pos : NULL;
73}
74
75static void zorro_seq_stop(struct seq_file *m, void *v)
76{
77}
78
79static int zorro_seq_show(struct seq_file *m, void *v)
80{
81 unsigned int slot = *(loff_t *)v;
82 struct zorro_dev *z = &zorro_autocon[slot];
83
84 seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
85 (unsigned long)zorro_resource_start(z),
86 (unsigned long)zorro_resource_len(z),
87 z->rom.er_Type);
88 return 0;
89}
90
91static const struct seq_operations zorro_devices_seq_ops = {
92 .start = zorro_seq_start,
93 .next = zorro_seq_next,
94 .stop = zorro_seq_stop,
95 .show = zorro_seq_show,
96};
97
98static struct proc_dir_entry *proc_bus_zorro_dir;
99
100static int __init zorro_proc_attach_device(unsigned int slot)
101{
102 struct proc_dir_entry *entry;
103 char name[4];
104
105 sprintf(name, "%02x", slot);
106 entry = proc_create_data(name, 0, proc_bus_zorro_dir,
107 &bus_zorro_proc_ops,
108 &zorro_autocon[slot]);
109 if (!entry)
110 return -ENOMEM;
111 proc_set_size(entry, sizeof(struct zorro_dev));
112 return 0;
113}
114
115static int __init zorro_proc_init(void)
116{
117 unsigned int slot;
118
119 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
120 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
121 proc_create_seq("devices", 0, proc_bus_zorro_dir,
122 &zorro_devices_seq_ops);
123 for (slot = 0; slot < zorro_num_autocon; slot++)
124 zorro_proc_attach_device(slot);
125 }
126 return 0;
127}
128
129device_initcall(zorro_proc_init);