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