2 * /proc/bus/pnp interface for Plug and Play devices
4 * Written by David Hinds, dahinds@users.sourceforge.net
5 * Modified by Thomas Hood
7 * The .../devices and .../<node> and .../boot/<node> files are
8 * utilized by the lspnp and setpnp utilities, supplied with the
10 * http://pcmcia-cs.sourceforge.net
12 * The .../escd file is utilized by the lsescd utility written by
15 * The .../legacy_device_resources file is not used yet.
17 * The other files are human-readable.
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/proc_fs.h>
25 #include <linux/pnp.h>
26 #include <linux/seq_file.h>
27 #include <linux/init.h>
29 #include <asm/uaccess.h>
33 static struct proc_dir_entry *proc_pnp = NULL;
34 static struct proc_dir_entry *proc_pnp_boot = NULL;
36 static int pnpconfig_proc_show(struct seq_file *m, void *v)
38 struct pnp_isa_config_struc pnps;
40 if (pnp_bios_isapnp_config(&pnps))
42 seq_printf(m, "structure_revision %d\n"
44 "ISA_read_data_port 0x%x\n",
45 pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
49 static int pnpconfig_proc_open(struct inode *inode, struct file *file)
51 return single_open(file, pnpconfig_proc_show, NULL);
54 static const struct file_operations pnpconfig_proc_fops = {
56 .open = pnpconfig_proc_open,
59 .release = single_release,
62 static int escd_info_proc_show(struct seq_file *m, void *v)
64 struct escd_info_struc escd;
66 if (pnp_bios_escd_info(&escd))
68 seq_printf(m, "min_ESCD_write_size %d\n"
71 escd.min_escd_write_size,
72 escd.escd_size, escd.nv_storage_base);
76 static int escd_info_proc_open(struct inode *inode, struct file *file)
78 return single_open(file, escd_info_proc_show, NULL);
81 static const struct file_operations escd_info_proc_fops = {
83 .open = escd_info_proc_open,
86 .release = single_release,
89 #define MAX_SANE_ESCD_SIZE (32*1024)
90 static int escd_proc_show(struct seq_file *m, void *v)
92 struct escd_info_struc escd;
96 if (pnp_bios_escd_info(&escd))
100 if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
102 "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__);
106 tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
110 if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
116 (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;
119 if (escd_size > MAX_SANE_ESCD_SIZE) {
120 printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by"
121 " BIOS read_escd call is too great\n", __func__);
126 seq_write(m, tmpbuf, escd_size);
131 static int escd_proc_open(struct inode *inode, struct file *file)
133 return single_open(file, escd_proc_show, NULL);
136 static const struct file_operations escd_proc_fops = {
137 .owner = THIS_MODULE,
138 .open = escd_proc_open,
141 .release = single_release,
144 static int pnp_legacyres_proc_show(struct seq_file *m, void *v)
148 buf = kmalloc(65536, GFP_KERNEL);
151 if (pnp_bios_get_stat_res(buf)) {
156 seq_write(m, buf, 65536);
161 static int pnp_legacyres_proc_open(struct inode *inode, struct file *file)
163 return single_open(file, pnp_legacyres_proc_show, NULL);
166 static const struct file_operations pnp_legacyres_proc_fops = {
167 .owner = THIS_MODULE,
168 .open = pnp_legacyres_proc_open,
171 .release = single_release,
174 static int pnp_devices_proc_show(struct seq_file *m, void *v)
176 struct pnp_bios_node *node;
179 node = kzalloc(node_info.max_node_size, GFP_KERNEL);
183 for (nodenum = 0; nodenum < 0xff;) {
184 u8 thisnodenum = nodenum;
186 if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
188 seq_printf(m, "%02x\t%08x\t%02x:%02x:%02x\t%04x\n",
189 node->handle, node->eisa_id,
190 node->type_code[0], node->type_code[1],
191 node->type_code[2], node->flags);
192 if (nodenum <= thisnodenum) {
194 "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
195 "PnPBIOS: proc_read_devices:",
196 (unsigned int)nodenum,
197 (unsigned int)thisnodenum);
205 static int pnp_devices_proc_open(struct inode *inode, struct file *file)
207 return single_open(file, pnp_devices_proc_show, NULL);
210 static const struct file_operations pnp_devices_proc_fops = {
211 .owner = THIS_MODULE,
212 .open = pnp_devices_proc_open,
215 .release = single_release,
218 static int pnpbios_proc_show(struct seq_file *m, void *v)
220 void *data = m->private;
221 struct pnp_bios_node *node;
222 int boot = (long)data >> 8;
223 u8 nodenum = (long)data;
226 node = kzalloc(node_info.max_node_size, GFP_KERNEL);
229 if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
233 len = node->size - sizeof(struct pnp_bios_node);
234 seq_write(m, node->data, len);
239 static int pnpbios_proc_open(struct inode *inode, struct file *file)
241 return single_open(file, pnpbios_proc_show, PDE(inode)->data);
244 static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
245 size_t count, loff_t *pos)
247 void *data = PDE(file->f_path.dentry->d_inode)->data;
248 struct pnp_bios_node *node;
249 int boot = (long)data >> 8;
250 u8 nodenum = (long)data;
253 node = kzalloc(node_info.max_node_size, GFP_KERNEL);
256 if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
260 if (count != node->size - sizeof(struct pnp_bios_node)) {
264 if (copy_from_user(node->data, buf, count)) {
268 if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
278 static const struct file_operations pnpbios_proc_fops = {
279 .owner = THIS_MODULE,
280 .open = pnpbios_proc_open,
283 .release = single_release,
284 .write = pnpbios_proc_write,
287 int pnpbios_interface_attach_device(struct pnp_bios_node *node)
291 sprintf(name, "%02x", node->handle);
295 if (!pnpbios_dont_use_current_config) {
296 proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_fops,
297 (void *)(long)(node->handle));
302 if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_fops,
303 (void *)(long)(node->handle + 0x100)))
309 * When this is called, pnpbios functions are assumed to
310 * work and the pnpbios_dont_use_current_config flag
311 * should already have been set to the appropriate value
313 int __init pnpbios_proc_init(void)
315 proc_pnp = proc_mkdir("bus/pnp", NULL);
318 proc_pnp_boot = proc_mkdir("boot", proc_pnp);
321 proc_create("devices", 0, proc_pnp, &pnp_devices_proc_fops);
322 proc_create("configuration_info", 0, proc_pnp, &pnpconfig_proc_fops);
323 proc_create("escd_info", 0, proc_pnp, &escd_info_proc_fops);
324 proc_create("escd", S_IRUSR, proc_pnp, &escd_proc_fops);
325 proc_create("legacy_device_resources", 0, proc_pnp, &pnp_legacyres_proc_fops);
330 void __exit pnpbios_proc_exit(void)
338 for (i = 0; i < 0xff; i++) {
339 sprintf(name, "%02x", i);
340 if (!pnpbios_dont_use_current_config)
341 remove_proc_entry(name, proc_pnp);
342 remove_proc_entry(name, proc_pnp_boot);
344 remove_proc_entry("legacy_device_resources", proc_pnp);
345 remove_proc_entry("escd", proc_pnp);
346 remove_proc_entry("escd_info", proc_pnp);
347 remove_proc_entry("configuration_info", proc_pnp);
348 remove_proc_entry("devices", proc_pnp);
349 remove_proc_entry("boot", proc_pnp);
350 remove_proc_entry("bus/pnp", NULL);