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 | |
24 | static loff_t |
25 | proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) |
26 | { |
27 | return fixed_size_llseek(file, offset: off, whence, size: sizeof(struct ConfigDev)); |
28 | } |
29 | |
30 | static ssize_t |
31 | proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) |
32 | { |
33 | struct zorro_dev *z = pde_data(inode: file_inode(f: 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(to: buf, from: (void *)&cd + pos, n: nbytes)) |
53 | return -EFAULT; |
54 | *ppos += nbytes; |
55 | |
56 | return nbytes; |
57 | } |
58 | |
59 | static const struct proc_ops bus_zorro_proc_ops = { |
60 | .proc_lseek = proc_bus_zorro_lseek, |
61 | .proc_read = proc_bus_zorro_read, |
62 | }; |
63 | |
64 | static void * zorro_seq_start(struct seq_file *m, loff_t *pos) |
65 | { |
66 | return (*pos < zorro_num_autocon) ? pos : NULL; |
67 | } |
68 | |
69 | static 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 | |
75 | static void zorro_seq_stop(struct seq_file *m, void *v) |
76 | { |
77 | } |
78 | |
79 | static 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, fmt: "%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 | |
91 | static 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 | |
98 | static struct proc_dir_entry *proc_bus_zorro_dir; |
99 | |
100 | static int __init zorro_proc_attach_device(unsigned int slot) |
101 | { |
102 | struct proc_dir_entry *entry; |
103 | char name[4]; |
104 | |
105 | sprintf(buf: name, fmt: "%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 | |
115 | static 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 | |
129 | device_initcall(zorro_proc_init); |
130 | |