[PATCH] pcmcia: export CIS in sysfs
[linux-3.10.git] / drivers / pcmcia / socket_sysfs.c
1 /*
2  * socket_sysfs.c -- most of socket-related sysfs output
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * (C) 2003 - 2004              Dominik Brodowski
9  */
10
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/config.h>
16 #include <linux/string.h>
17 #include <linux/major.h>
18 #include <linux/errno.h>
19 #include <linux/slab.h>
20 #include <linux/mm.h>
21 #include <linux/interrupt.h>
22 #include <linux/timer.h>
23 #include <linux/ioport.h>
24 #include <linux/delay.h>
25 #include <linux/pm.h>
26 #include <linux/pci.h>
27 #include <linux/device.h>
28 #include <asm/system.h>
29 #include <asm/irq.h>
30
31 #define IN_CARD_SERVICES
32 #include <pcmcia/version.h>
33 #include <pcmcia/cs_types.h>
34 #include <pcmcia/ss.h>
35 #include <pcmcia/cs.h>
36 #include <pcmcia/bulkmem.h>
37 #include <pcmcia/cistpl.h>
38 #include <pcmcia/cisreg.h>
39 #include <pcmcia/ds.h>
40 #include "cs_internal.h"
41
42 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
43
44 static ssize_t pccard_show_type(struct class_device *dev, char *buf)
45 {
46         int val;
47         struct pcmcia_socket *s = to_socket(dev);
48
49         if (!(s->state & SOCKET_PRESENT))
50                 return -ENODEV;
51         s->ops->get_status(s, &val);
52         if (val & SS_CARDBUS)
53                 return sprintf(buf, "32-bit\n");
54         if (val & SS_DETECT)
55                 return sprintf(buf, "16-bit\n");
56         return sprintf(buf, "invalid\n");
57 }
58 static CLASS_DEVICE_ATTR(card_type, 0400, pccard_show_type, NULL);
59
60 static ssize_t pccard_show_voltage(struct class_device *dev, char *buf)
61 {
62         int val;
63         struct pcmcia_socket *s = to_socket(dev);
64
65         if (!(s->state & SOCKET_PRESENT))
66                 return -ENODEV;
67         s->ops->get_status(s, &val);
68         if (val & SS_3VCARD)
69                 return sprintf(buf, "3.3V\n");
70         if (val & SS_XVCARD)
71                 return sprintf(buf, "X.XV\n");
72         return sprintf(buf, "5.0V\n");
73 }
74 static CLASS_DEVICE_ATTR(card_voltage, 0400, pccard_show_voltage, NULL);
75
76 static ssize_t pccard_show_vpp(struct class_device *dev, char *buf)
77 {
78         struct pcmcia_socket *s = to_socket(dev);
79         if (!(s->state & SOCKET_PRESENT))
80                 return -ENODEV;
81         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
82 }
83 static CLASS_DEVICE_ATTR(card_vpp, 0400, pccard_show_vpp, NULL);
84
85 static ssize_t pccard_show_vcc(struct class_device *dev, char *buf)
86 {
87         struct pcmcia_socket *s = to_socket(dev);
88         if (!(s->state & SOCKET_PRESENT))
89                 return -ENODEV;
90         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
91 }
92 static CLASS_DEVICE_ATTR(card_vcc, 0400, pccard_show_vcc, NULL);
93
94
95 static ssize_t pccard_store_insert(struct class_device *dev, const char *buf, size_t count)
96 {
97         ssize_t ret;
98         struct pcmcia_socket *s = to_socket(dev);
99
100         if (!count)
101                 return -EINVAL;
102
103         ret = pcmcia_insert_card(s);
104
105         return ret ? ret : count;
106 }
107 static CLASS_DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
108
109 static ssize_t pccard_store_eject(struct class_device *dev, const char *buf, size_t count)
110 {
111         ssize_t ret;
112         struct pcmcia_socket *s = to_socket(dev);
113
114         if (!count)
115                 return -EINVAL;
116
117         ret = pcmcia_eject_card(s);
118
119         return ret ? ret : count;
120 }
121 static CLASS_DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
122
123
124 static ssize_t pccard_show_irq_mask(struct class_device *dev, char *buf)
125 {
126         struct pcmcia_socket *s = to_socket(dev);
127         return sprintf(buf, "0x%04x\n", s->irq_mask);
128 }
129
130 static ssize_t pccard_store_irq_mask(struct class_device *dev, const char *buf, size_t count)
131 {
132         ssize_t ret;
133         struct pcmcia_socket *s = to_socket(dev);
134         u32 mask;
135
136         if (!count)
137                 return -EINVAL;
138
139         ret = sscanf (buf, "0x%x\n", &mask);
140
141         if (ret == 1) {
142                 s->irq_mask &= mask;
143                 ret = 0;
144         }
145
146         return ret ? ret : count;
147 }
148 static CLASS_DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
149
150
151 static ssize_t pccard_show_resource(struct class_device *dev, char *buf)
152 {
153         struct pcmcia_socket *s = to_socket(dev);
154         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
155 }
156
157 static ssize_t pccard_store_resource(struct class_device *dev, const char *buf, size_t count)
158 {
159         unsigned long flags;
160         struct pcmcia_socket *s = to_socket(dev);
161
162         if (!count)
163                 return -EINVAL;
164
165         spin_lock_irqsave(&s->lock, flags);
166         if (!s->resource_setup_done) {
167                 s->resource_setup_done = 1;
168                 spin_unlock_irqrestore(&s->lock, flags);
169
170                 down(&s->skt_sem);
171                 if ((s->callback) &&
172                     (s->state & SOCKET_PRESENT) &&
173                     !(s->state & SOCKET_CARDBUS)) {
174                         if (try_module_get(s->callback->owner)) {
175                                 s->callback->resources_done(s);
176                                 module_put(s->callback->owner);
177                         }
178                 }
179                 up(&s->skt_sem);
180
181                 return count;
182         }
183         spin_unlock_irqrestore(&s->lock, flags);
184
185         return count;
186 }
187 static CLASS_DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
188
189
190 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
191 {
192         tuple_t tuple;
193         int status, i;
194         loff_t pointer = 0;
195         ssize_t ret = 0;
196         u_char *tuplebuffer;
197         u_char *tempbuffer;
198
199         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
200         if (!tuplebuffer)
201                 return -ENOMEM;
202
203         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
204         if (!tempbuffer) {
205                 ret = -ENOMEM;
206                 goto free_tuple;
207         }
208
209         memset(&tuple, 0, sizeof(tuple_t));
210
211         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
212         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
213         tuple.TupleOffset = 0;
214
215         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
216         while (!status) {
217                 tuple.TupleData = tuplebuffer;
218                 tuple.TupleDataMax = 255;
219                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
220
221                 status = pccard_get_tuple_data(s, &tuple);
222                 if (status)
223                         break;
224
225                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
226                         tempbuffer[0] = tuple.TupleCode & 0xff;
227                         tempbuffer[1] = tuple.TupleLink & 0xff;
228                         for (i = 0; i < tuple.TupleDataLen; i++)
229                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
230
231                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
232                                 if (((i + pointer) >= off) &&
233                                     (i + pointer) < (off + count)) {
234                                         buf[ret] = tempbuffer[i];
235                                         ret++;
236                                 }
237                         }
238                 }
239
240                 pointer += 2 + tuple.TupleDataLen;
241
242                 if (pointer >= (off + count))
243                         break;
244
245                 if (tuple.TupleCode == CISTPL_END)
246                         break;
247                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
248         }
249
250         kfree(tempbuffer);
251  free_tuple:
252         kfree(tuplebuffer);
253
254         return (ret);
255 }
256
257 static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
258 {
259         unsigned int size = 0x200;
260
261         if (off >= size)
262                 count = 0;
263         else {
264                 struct pcmcia_socket *s;
265                 cisinfo_t cisinfo;
266
267                 if (off + count > size)
268                         count = size - off;
269
270                 s = to_socket(container_of(kobj, struct class_device, kobj));
271
272                 if (!(s->state & SOCKET_PRESENT))
273                         return -ENODEV;
274                 if (pccard_validate_cis(s, BIND_FN_ALL, &cisinfo))
275                         return -EIO;
276                 if (!cisinfo.Chains)
277                         return -ENODATA;
278
279                 count = pccard_extract_cis(s, buf, off, count);
280         }
281
282         return (count);
283 }
284
285
286 static struct class_device_attribute *pccard_socket_attributes[] = {
287         &class_device_attr_card_type,
288         &class_device_attr_card_voltage,
289         &class_device_attr_card_vpp,
290         &class_device_attr_card_vcc,
291         &class_device_attr_card_insert,
292         &class_device_attr_card_eject,
293         &class_device_attr_card_irq_mask,
294         &class_device_attr_available_resources_setup_done,
295         NULL,
296 };
297
298 static struct bin_attribute pccard_cis_attr = {
299         .attr = { .name = "cis", .mode = S_IRUGO, .owner = THIS_MODULE},
300         .size = 0x200,
301         .read = pccard_show_cis,
302 };
303
304 static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev)
305 {
306         struct class_device_attribute **attr;
307         int ret = 0;
308
309         for (attr = pccard_socket_attributes; *attr; attr++) {
310                 ret = class_device_create_file(class_dev, *attr);
311                 if (ret)
312                         break;
313         }
314         if (!ret)
315                 ret = sysfs_create_bin_file(&class_dev->kobj, &pccard_cis_attr);
316
317         return ret;
318 }
319
320 static void __devexit pccard_sysfs_remove_socket(struct class_device *class_dev)
321 {
322         struct class_device_attribute **attr;
323
324         sysfs_remove_bin_file(&class_dev->kobj, &pccard_cis_attr);
325         for (attr = pccard_socket_attributes; *attr; attr++)
326                 class_device_remove_file(class_dev, *attr);
327 }
328
329 struct class_interface pccard_sysfs_interface = {
330         .class = &pcmcia_socket_class,
331         .add = &pccard_sysfs_add_socket,
332         .remove = __devexit_p(&pccard_sysfs_remove_socket),
333 };