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 <mj@atrey.karlin.mff.cuni.cz>
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);
130