ASoC: pcm512x: Scrub my work address from the driver
[sfrench/cifs-2.6.git] / drivers / pnp / pnpbios / proc.c
1 /*
2  * /proc/bus/pnp interface for Plug and Play devices
3  *
4  * Written by David Hinds, dahinds@users.sourceforge.net
5  * Modified by Thomas Hood
6  *
7  * The .../devices and .../<node> and .../boot/<node> files are
8  * utilized by the lspnp and setpnp utilities, supplied with the
9  * pcmcia-cs package.
10  *     http://pcmcia-cs.sourceforge.net
11  *
12  * The .../escd file is utilized by the lsescd utility written by
13  * Gunther Mayer.
14  *
15  * The .../legacy_device_resources file is not used yet.
16  *
17  * The other files are human-readable.
18  */
19
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>
28
29 #include <linux/uaccess.h>
30
31 #include "pnpbios.h"
32
33 static struct proc_dir_entry *proc_pnp = NULL;
34 static struct proc_dir_entry *proc_pnp_boot = NULL;
35
36 static int pnpconfig_proc_show(struct seq_file *m, void *v)
37 {
38         struct pnp_isa_config_struc pnps;
39
40         if (pnp_bios_isapnp_config(&pnps))
41                 return -EIO;
42         seq_printf(m, "structure_revision %d\n"
43                       "number_of_CSNs %d\n"
44                       "ISA_read_data_port 0x%x\n",
45                    pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
46         return 0;
47 }
48
49 static int pnpconfig_proc_open(struct inode *inode, struct file *file)
50 {
51         return single_open(file, pnpconfig_proc_show, NULL);
52 }
53
54 static const struct file_operations pnpconfig_proc_fops = {
55         .owner          = THIS_MODULE,
56         .open           = pnpconfig_proc_open,
57         .read           = seq_read,
58         .llseek         = seq_lseek,
59         .release        = single_release,
60 };
61
62 static int escd_info_proc_show(struct seq_file *m, void *v)
63 {
64         struct escd_info_struc escd;
65
66         if (pnp_bios_escd_info(&escd))
67                 return -EIO;
68         seq_printf(m, "min_ESCD_write_size %d\n"
69                         "ESCD_size %d\n"
70                         "NVRAM_base 0x%x\n",
71                         escd.min_escd_write_size,
72                         escd.escd_size, escd.nv_storage_base);
73         return 0;
74 }
75
76 static int escd_info_proc_open(struct inode *inode, struct file *file)
77 {
78         return single_open(file, escd_info_proc_show, NULL);
79 }
80
81 static const struct file_operations escd_info_proc_fops = {
82         .owner          = THIS_MODULE,
83         .open           = escd_info_proc_open,
84         .read           = seq_read,
85         .llseek         = seq_lseek,
86         .release        = single_release,
87 };
88
89 #define MAX_SANE_ESCD_SIZE (32*1024)
90 static int escd_proc_show(struct seq_file *m, void *v)
91 {
92         struct escd_info_struc escd;
93         char *tmpbuf;
94         int escd_size;
95
96         if (pnp_bios_escd_info(&escd))
97                 return -EIO;
98
99         /* sanity check */
100         if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
101                 printk(KERN_ERR
102                        "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__);
103                 return -EFBIG;
104         }
105
106         tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
107         if (!tmpbuf)
108                 return -ENOMEM;
109
110         if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
111                 kfree(tmpbuf);
112                 return -EIO;
113         }
114
115         escd_size =
116             (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;
117
118         /* sanity check */
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__);
122                 kfree(tmpbuf);
123                 return -EFBIG;
124         }
125
126         seq_write(m, tmpbuf, escd_size);
127         kfree(tmpbuf);
128         return 0;
129 }
130
131 static int escd_proc_open(struct inode *inode, struct file *file)
132 {
133         return single_open(file, escd_proc_show, NULL);
134 }
135
136 static const struct file_operations escd_proc_fops = {
137         .owner          = THIS_MODULE,
138         .open           = escd_proc_open,
139         .read           = seq_read,
140         .llseek         = seq_lseek,
141         .release        = single_release,
142 };
143
144 static int pnp_legacyres_proc_show(struct seq_file *m, void *v)
145 {
146         void *buf;
147
148         buf = kmalloc(65536, GFP_KERNEL);
149         if (!buf)
150                 return -ENOMEM;
151         if (pnp_bios_get_stat_res(buf)) {
152                 kfree(buf);
153                 return -EIO;
154         }
155
156         seq_write(m, buf, 65536);
157         kfree(buf);
158         return 0;
159 }
160
161 static int pnp_legacyres_proc_open(struct inode *inode, struct file *file)
162 {
163         return single_open(file, pnp_legacyres_proc_show, NULL);
164 }
165
166 static const struct file_operations pnp_legacyres_proc_fops = {
167         .owner          = THIS_MODULE,
168         .open           = pnp_legacyres_proc_open,
169         .read           = seq_read,
170         .llseek         = seq_lseek,
171         .release        = single_release,
172 };
173
174 static int pnp_devices_proc_show(struct seq_file *m, void *v)
175 {
176         struct pnp_bios_node *node;
177         u8 nodenum;
178
179         node = kzalloc(node_info.max_node_size, GFP_KERNEL);
180         if (!node)
181                 return -ENOMEM;
182
183         for (nodenum = 0; nodenum < 0xff;) {
184                 u8 thisnodenum = nodenum;
185
186                 if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
187                         break;
188                 seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n",
189                              node->handle, node->eisa_id,
190                              node->type_code, node->flags);
191                 if (nodenum <= thisnodenum) {
192                         printk(KERN_ERR
193                                "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
194                                "PnPBIOS: proc_read_devices:",
195                                (unsigned int)nodenum,
196                                (unsigned int)thisnodenum);
197                         break;
198                 }
199         }
200         kfree(node);
201         return 0;
202 }
203
204 static int pnp_devices_proc_open(struct inode *inode, struct file *file)
205 {
206         return single_open(file, pnp_devices_proc_show, NULL);
207 }
208
209 static const struct file_operations pnp_devices_proc_fops = {
210         .owner          = THIS_MODULE,
211         .open           = pnp_devices_proc_open,
212         .read           = seq_read,
213         .llseek         = seq_lseek,
214         .release        = single_release,
215 };
216
217 static int pnpbios_proc_show(struct seq_file *m, void *v)
218 {
219         void *data = m->private;
220         struct pnp_bios_node *node;
221         int boot = (long)data >> 8;
222         u8 nodenum = (long)data;
223         int len;
224
225         node = kzalloc(node_info.max_node_size, GFP_KERNEL);
226         if (!node)
227                 return -ENOMEM;
228         if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
229                 kfree(node);
230                 return -EIO;
231         }
232         len = node->size - sizeof(struct pnp_bios_node);
233         seq_write(m, node->data, len);
234         kfree(node);
235         return 0;
236 }
237
238 static int pnpbios_proc_open(struct inode *inode, struct file *file)
239 {
240         return single_open(file, pnpbios_proc_show, PDE_DATA(inode));
241 }
242
243 static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
244                                   size_t count, loff_t *pos)
245 {
246         void *data = PDE_DATA(file_inode(file));
247         struct pnp_bios_node *node;
248         int boot = (long)data >> 8;
249         u8 nodenum = (long)data;
250         int ret = count;
251
252         node = kzalloc(node_info.max_node_size, GFP_KERNEL);
253         if (!node)
254                 return -ENOMEM;
255         if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
256                 ret = -EIO;
257                 goto out;
258         }
259         if (count != node->size - sizeof(struct pnp_bios_node)) {
260                 ret = -EINVAL;
261                 goto out;
262         }
263         if (copy_from_user(node->data, buf, count)) {
264                 ret = -EFAULT;
265                 goto out;
266         }
267         if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
268                 ret = -EINVAL;
269                 goto out;
270         }
271         ret = count;
272 out:
273         kfree(node);
274         return ret;
275 }
276
277 static const struct file_operations pnpbios_proc_fops = {
278         .owner          = THIS_MODULE,
279         .open           = pnpbios_proc_open,
280         .read           = seq_read,
281         .llseek         = seq_lseek,
282         .release        = single_release,
283         .write          = pnpbios_proc_write,
284 };
285
286 int pnpbios_interface_attach_device(struct pnp_bios_node *node)
287 {
288         char name[3];
289
290         sprintf(name, "%02x", node->handle);
291
292         if (!proc_pnp)
293                 return -EIO;
294         if (!pnpbios_dont_use_current_config) {
295                 proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_fops,
296                                  (void *)(long)(node->handle));
297         }
298
299         if (!proc_pnp_boot)
300                 return -EIO;
301         if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_fops,
302                              (void *)(long)(node->handle + 0x100)))
303                 return 0;
304         return -EIO;
305 }
306
307 /*
308  * When this is called, pnpbios functions are assumed to
309  * work and the pnpbios_dont_use_current_config flag
310  * should already have been set to the appropriate value
311  */
312 int __init pnpbios_proc_init(void)
313 {
314         proc_pnp = proc_mkdir("bus/pnp", NULL);
315         if (!proc_pnp)
316                 return -EIO;
317         proc_pnp_boot = proc_mkdir("boot", proc_pnp);
318         if (!proc_pnp_boot)
319                 return -EIO;
320         proc_create("devices", 0, proc_pnp, &pnp_devices_proc_fops);
321         proc_create("configuration_info", 0, proc_pnp, &pnpconfig_proc_fops);
322         proc_create("escd_info", 0, proc_pnp, &escd_info_proc_fops);
323         proc_create("escd", S_IRUSR, proc_pnp, &escd_proc_fops);
324         proc_create("legacy_device_resources", 0, proc_pnp, &pnp_legacyres_proc_fops);
325
326         return 0;
327 }
328
329 void __exit pnpbios_proc_exit(void)
330 {
331         int i;
332         char name[3];
333
334         if (!proc_pnp)
335                 return;
336
337         for (i = 0; i < 0xff; i++) {
338                 sprintf(name, "%02x", i);
339                 if (!pnpbios_dont_use_current_config)
340                         remove_proc_entry(name, proc_pnp);
341                 remove_proc_entry(name, proc_pnp_boot);
342         }
343         remove_proc_entry("legacy_device_resources", proc_pnp);
344         remove_proc_entry("escd", proc_pnp);
345         remove_proc_entry("escd_info", proc_pnp);
346         remove_proc_entry("configuration_info", proc_pnp);
347         remove_proc_entry("devices", proc_pnp);
348         remove_proc_entry("boot", proc_pnp);
349         remove_proc_entry("bus/pnp", NULL);
350 }