Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* drivers/nubus/proc.c: Proc FS interface for NuBus. |
3 | ||
4 | By David Huggins-Daines <dhd@debian.org> | |
5 | ||
6 | Much code and many ideas from drivers/pci/proc.c: | |
7 | Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
8 | ||
9 | This is initially based on the Zorro and PCI interfaces. However, | |
10 | it works somewhat differently. The intent is to provide a | |
11 | structure in /proc analogous to the structure of the NuBus ROM | |
12 | resources. | |
13 | ||
14 | Therefore each NuBus device is in fact a directory, which may in | |
15 | turn contain subdirectories. The "files" correspond to NuBus | |
16 | resource records. For those types of records which we know how to | |
17 | convert to formats that are meaningful to userspace (mostly just | |
18 | icons) these files will provide "cooked" data. Otherwise they will | |
19 | simply provide raw access (read-only of course) to the ROM. */ | |
20 | ||
21 | #include <linux/types.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/nubus.h> | |
24 | #include <linux/proc_fs.h> | |
076ec04b | 25 | #include <linux/seq_file.h> |
1da177e4 | 26 | #include <linux/init.h> |
99ffab81 AB |
27 | #include <linux/module.h> |
28 | ||
7c0f6ba6 | 29 | #include <linux/uaccess.h> |
1da177e4 LT |
30 | #include <asm/byteorder.h> |
31 | ||
32 | static int | |
076ec04b | 33 | nubus_devices_proc_show(struct seq_file *m, void *v) |
1da177e4 LT |
34 | { |
35 | struct nubus_dev *dev = nubus_devices; | |
1da177e4 | 36 | |
076ec04b AD |
37 | while (dev) { |
38 | seq_printf(m, "%x\t%04x %04x %04x %04x", | |
1da177e4 LT |
39 | dev->board->slot, |
40 | dev->category, | |
41 | dev->type, | |
42 | dev->dr_sw, | |
43 | dev->dr_hw); | |
076ec04b | 44 | seq_printf(m, "\t%08lx\n", dev->board->slot_addr); |
1da177e4 LT |
45 | dev = dev->next; |
46 | } | |
076ec04b AD |
47 | return 0; |
48 | } | |
49 | ||
50 | static int nubus_devices_proc_open(struct inode *inode, struct file *file) | |
51 | { | |
52 | return single_open(file, nubus_devices_proc_show, NULL); | |
1da177e4 LT |
53 | } |
54 | ||
076ec04b | 55 | static const struct file_operations nubus_devices_proc_fops = { |
076ec04b AD |
56 | .open = nubus_devices_proc_open, |
57 | .read = seq_read, | |
58 | .llseek = seq_lseek, | |
59 | .release = single_release, | |
60 | }; | |
61 | ||
1da177e4 LT |
62 | static struct proc_dir_entry *proc_bus_nubus_dir; |
63 | ||
11db656a DH |
64 | static const struct file_operations nubus_proc_subdir_fops = { |
65 | #warning Need to set some I/O handlers here | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | static void nubus_proc_subdir(struct nubus_dev* dev, |
69 | struct proc_dir_entry* parent, | |
70 | struct nubus_dir* dir) | |
71 | { | |
72 | struct nubus_dirent ent; | |
73 | ||
74 | /* Some of these are directories, others aren't */ | |
75 | while (nubus_readdir(dir, &ent) != -1) { | |
76 | char name[8]; | |
77 | struct proc_dir_entry* e; | |
78 | ||
79 | sprintf(name, "%x", ent.type); | |
11db656a DH |
80 | e = proc_create(name, S_IFREG | S_IRUGO | S_IWUSR, parent, |
81 | &nubus_proc_subdir_fops); | |
82 | if (!e) | |
83 | return; | |
1da177e4 LT |
84 | } |
85 | } | |
86 | ||
87 | /* Can't do this recursively since the root directory is structured | |
88 | somewhat differently from the subdirectories */ | |
89 | static void nubus_proc_populate(struct nubus_dev* dev, | |
90 | struct proc_dir_entry* parent, | |
91 | struct nubus_dir* root) | |
92 | { | |
93 | struct nubus_dirent ent; | |
94 | ||
95 | /* We know these are all directories (board resource + one or | |
96 | more functional resources) */ | |
97 | while (nubus_readdir(root, &ent) != -1) { | |
98 | char name[8]; | |
99 | struct proc_dir_entry* e; | |
100 | struct nubus_dir dir; | |
101 | ||
102 | sprintf(name, "%x", ent.type); | |
103 | e = proc_mkdir(name, parent); | |
104 | if (!e) return; | |
105 | ||
106 | /* And descend */ | |
107 | if (nubus_get_subdir(&ent, &dir) == -1) { | |
108 | /* This shouldn't happen */ | |
109 | printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n", | |
110 | dev->board->slot, ent.type); | |
111 | continue; | |
112 | } else { | |
113 | nubus_proc_subdir(dev, e, &dir); | |
114 | } | |
115 | } | |
116 | } | |
117 | ||
118 | int nubus_proc_attach_device(struct nubus_dev *dev) | |
119 | { | |
120 | struct proc_dir_entry *e; | |
121 | struct nubus_dir root; | |
122 | char name[8]; | |
123 | ||
124 | if (dev == NULL) { | |
125 | printk(KERN_ERR | |
126 | "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n"); | |
127 | return -1; | |
128 | } | |
129 | ||
130 | if (dev->board == NULL) { | |
131 | printk(KERN_ERR | |
132 | "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n"); | |
133 | printk("dev = %p, dev->board = %p\n", dev, dev->board); | |
134 | return -1; | |
135 | } | |
136 | ||
137 | /* Create a directory */ | |
138 | sprintf(name, "%x", dev->board->slot); | |
139 | e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir); | |
140 | if (!e) | |
141 | return -ENOMEM; | |
142 | ||
143 | /* Now recursively populate it with files */ | |
144 | nubus_get_root_dir(dev->board, &root); | |
145 | nubus_proc_populate(dev, e, &root); | |
146 | ||
147 | return 0; | |
148 | } | |
99ffab81 | 149 | EXPORT_SYMBOL(nubus_proc_attach_device); |
1da177e4 | 150 | |
11db656a DH |
151 | /* |
152 | * /proc/nubus stuff | |
153 | */ | |
154 | static int nubus_proc_show(struct seq_file *m, void *v) | |
155 | { | |
156 | const struct nubus_board *board = v; | |
157 | ||
158 | /* Display header on line 1 */ | |
159 | if (v == SEQ_START_TOKEN) | |
160 | seq_puts(m, "Nubus devices found:\n"); | |
161 | else | |
162 | seq_printf(m, "Slot %X: %s\n", board->slot, board->name); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static void *nubus_proc_start(struct seq_file *m, loff_t *_pos) | |
167 | { | |
168 | struct nubus_board *board; | |
169 | unsigned pos; | |
170 | ||
171 | if (*_pos > LONG_MAX) | |
172 | return NULL; | |
173 | pos = *_pos; | |
174 | if (pos == 0) | |
175 | return SEQ_START_TOKEN; | |
176 | for (board = nubus_boards; board; board = board->next) | |
177 | if (--pos == 0) | |
178 | break; | |
179 | return board; | |
180 | } | |
181 | ||
182 | static void *nubus_proc_next(struct seq_file *p, void *v, loff_t *_pos) | |
183 | { | |
184 | /* Walk the list of NuBus boards */ | |
185 | struct nubus_board *board = v; | |
186 | ||
187 | ++*_pos; | |
188 | if (v == SEQ_START_TOKEN) | |
189 | board = nubus_boards; | |
190 | else if (board) | |
191 | board = board->next; | |
192 | return board; | |
193 | } | |
194 | ||
195 | static void nubus_proc_stop(struct seq_file *p, void *v) | |
196 | { | |
197 | } | |
198 | ||
199 | static const struct seq_operations nubus_proc_seqops = { | |
200 | .start = nubus_proc_start, | |
201 | .next = nubus_proc_next, | |
202 | .stop = nubus_proc_stop, | |
203 | .show = nubus_proc_show, | |
204 | }; | |
205 | ||
206 | static int nubus_proc_open(struct inode *inode, struct file *file) | |
207 | { | |
208 | return seq_open(file, &nubus_proc_seqops); | |
209 | } | |
210 | ||
211 | static const struct file_operations nubus_proc_fops = { | |
212 | .open = nubus_proc_open, | |
213 | .read = seq_read, | |
214 | .llseek = seq_lseek, | |
215 | .release = seq_release, | |
216 | }; | |
217 | ||
1da177e4 LT |
218 | void __init proc_bus_nubus_add_devices(void) |
219 | { | |
220 | struct nubus_dev *dev; | |
221 | ||
222 | for(dev = nubus_devices; dev; dev = dev->next) | |
223 | nubus_proc_attach_device(dev); | |
224 | } | |
225 | ||
226 | void __init nubus_proc_init(void) | |
227 | { | |
11db656a | 228 | proc_create("nubus", 0, NULL, &nubus_proc_fops); |
1da177e4 LT |
229 | if (!MACH_IS_MAC) |
230 | return; | |
9c37066d | 231 | proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL); |
076ec04b | 232 | proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops); |
1da177e4 LT |
233 | proc_bus_nubus_add_devices(); |
234 | } |