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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 AD |
54 | static const struct file_operations nubus_devices_proc_fops = { |
55 | .owner = THIS_MODULE, | |
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 | ||
64 | static void nubus_proc_subdir(struct nubus_dev* dev, | |
65 | struct proc_dir_entry* parent, | |
66 | struct nubus_dir* dir) | |
67 | { | |
68 | struct nubus_dirent ent; | |
69 | ||
70 | /* Some of these are directories, others aren't */ | |
71 | while (nubus_readdir(dir, &ent) != -1) { | |
72 | char name[8]; | |
73 | struct proc_dir_entry* e; | |
74 | ||
75 | sprintf(name, "%x", ent.type); | |
76 | e = create_proc_entry(name, S_IFREG | S_IRUGO | | |
77 | S_IWUSR, parent); | |
78 | if (!e) return; | |
79 | } | |
80 | } | |
81 | ||
82 | /* Can't do this recursively since the root directory is structured | |
83 | somewhat differently from the subdirectories */ | |
84 | static void nubus_proc_populate(struct nubus_dev* dev, | |
85 | struct proc_dir_entry* parent, | |
86 | struct nubus_dir* root) | |
87 | { | |
88 | struct nubus_dirent ent; | |
89 | ||
90 | /* We know these are all directories (board resource + one or | |
91 | more functional resources) */ | |
92 | while (nubus_readdir(root, &ent) != -1) { | |
93 | char name[8]; | |
94 | struct proc_dir_entry* e; | |
95 | struct nubus_dir dir; | |
96 | ||
97 | sprintf(name, "%x", ent.type); | |
98 | e = proc_mkdir(name, parent); | |
99 | if (!e) return; | |
100 | ||
101 | /* And descend */ | |
102 | if (nubus_get_subdir(&ent, &dir) == -1) { | |
103 | /* This shouldn't happen */ | |
104 | printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n", | |
105 | dev->board->slot, ent.type); | |
106 | continue; | |
107 | } else { | |
108 | nubus_proc_subdir(dev, e, &dir); | |
109 | } | |
110 | } | |
111 | } | |
112 | ||
113 | int nubus_proc_attach_device(struct nubus_dev *dev) | |
114 | { | |
115 | struct proc_dir_entry *e; | |
116 | struct nubus_dir root; | |
117 | char name[8]; | |
118 | ||
119 | if (dev == NULL) { | |
120 | printk(KERN_ERR | |
121 | "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n"); | |
122 | return -1; | |
123 | } | |
124 | ||
125 | if (dev->board == NULL) { | |
126 | printk(KERN_ERR | |
127 | "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n"); | |
128 | printk("dev = %p, dev->board = %p\n", dev, dev->board); | |
129 | return -1; | |
130 | } | |
131 | ||
132 | /* Create a directory */ | |
133 | sprintf(name, "%x", dev->board->slot); | |
134 | e = dev->procdir = proc_mkdir(name, proc_bus_nubus_dir); | |
135 | if (!e) | |
136 | return -ENOMEM; | |
137 | ||
138 | /* Now recursively populate it with files */ | |
139 | nubus_get_root_dir(dev->board, &root); | |
140 | nubus_proc_populate(dev, e, &root); | |
141 | ||
142 | return 0; | |
143 | } | |
99ffab81 | 144 | EXPORT_SYMBOL(nubus_proc_attach_device); |
1da177e4 LT |
145 | |
146 | /* FIXME: this is certainly broken! */ | |
147 | int nubus_proc_detach_device(struct nubus_dev *dev) | |
148 | { | |
149 | struct proc_dir_entry *e; | |
150 | ||
151 | if ((e = dev->procdir)) { | |
152 | if (atomic_read(&e->count)) | |
153 | return -EBUSY; | |
154 | remove_proc_entry(e->name, proc_bus_nubus_dir); | |
155 | dev->procdir = NULL; | |
156 | } | |
157 | return 0; | |
158 | } | |
99ffab81 | 159 | EXPORT_SYMBOL(nubus_proc_detach_device); |
1da177e4 LT |
160 | |
161 | void __init proc_bus_nubus_add_devices(void) | |
162 | { | |
163 | struct nubus_dev *dev; | |
164 | ||
165 | for(dev = nubus_devices; dev; dev = dev->next) | |
166 | nubus_proc_attach_device(dev); | |
167 | } | |
168 | ||
169 | void __init nubus_proc_init(void) | |
170 | { | |
171 | if (!MACH_IS_MAC) | |
172 | return; | |
9c37066d | 173 | proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL); |
076ec04b | 174 | proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops); |
1da177e4 LT |
175 | proc_bus_nubus_add_devices(); |
176 | } |