pcmcia: CodingStyle fixes
[linux-2.6.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/string.h>
16 #include <linux/major.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/mm.h>
20 #include <linux/interrupt.h>
21 #include <linux/timer.h>
22 #include <linux/ioport.h>
23 #include <linux/delay.h>
24 #include <linux/pm.h>
25 #include <linux/device.h>
26 #include <linux/mutex.h>
27 #include <asm/system.h>
28 #include <asm/irq.h>
29
30 #include <pcmcia/cs_types.h>
31 #include <pcmcia/ss.h>
32 #include <pcmcia/cs.h>
33 #include <pcmcia/cistpl.h>
34 #include <pcmcia/cisreg.h>
35 #include <pcmcia/ds.h>
36 #include "cs_internal.h"
37
38 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
39
40 static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
41                                 char *buf)
42 {
43         struct pcmcia_socket *s = to_socket(dev);
44
45         if (!(s->state & SOCKET_PRESENT))
46                 return -ENODEV;
47         if (s->state & SOCKET_CARDBUS)
48                 return sprintf(buf, "32-bit\n");
49         return sprintf(buf, "16-bit\n");
50 }
51 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
52
53 static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
54                                    char *buf)
55 {
56         struct pcmcia_socket *s = to_socket(dev);
57
58         if (!(s->state & SOCKET_PRESENT))
59                 return -ENODEV;
60         if (s->socket.Vcc)
61                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
62                                s->socket.Vcc % 10);
63         return sprintf(buf, "X.XV\n");
64 }
65 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
66
67 static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
68                                char *buf)
69 {
70         struct pcmcia_socket *s = to_socket(dev);
71         if (!(s->state & SOCKET_PRESENT))
72                 return -ENODEV;
73         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
74 }
75 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
76
77 static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
78                                char *buf)
79 {
80         struct pcmcia_socket *s = to_socket(dev);
81         if (!(s->state & SOCKET_PRESENT))
82                 return -ENODEV;
83         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
84 }
85 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
86
87
88 static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
89                                    const char *buf, size_t count)
90 {
91         ssize_t ret;
92         struct pcmcia_socket *s = to_socket(dev);
93
94         if (!count)
95                 return -EINVAL;
96
97         ret = pcmcia_insert_card(s);
98
99         return ret ? ret : count;
100 }
101 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
102
103
104 static ssize_t pccard_show_card_pm_state(struct device *dev,
105                                          struct device_attribute *attr,
106                                          char *buf)
107 {
108         struct pcmcia_socket *s = to_socket(dev);
109         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
110 }
111
112 static ssize_t pccard_store_card_pm_state(struct device *dev,
113                                           struct device_attribute *attr,
114                                           const char *buf, size_t count)
115 {
116         ssize_t ret = -EINVAL;
117         struct pcmcia_socket *s = to_socket(dev);
118
119         if (!count)
120                 return -EINVAL;
121
122         if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
123                 ret = pcmcia_suspend_card(s);
124         else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
125                 ret = pcmcia_resume_card(s);
126
127         return ret ? -ENODEV : count;
128 }
129 static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
130
131 static ssize_t pccard_store_eject(struct device *dev,
132                                   struct device_attribute *attr,
133                                   const char *buf, size_t count)
134 {
135         ssize_t ret;
136         struct pcmcia_socket *s = to_socket(dev);
137
138         if (!count)
139                 return -EINVAL;
140
141         ret = pcmcia_eject_card(s);
142
143         return ret ? ret : count;
144 }
145 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
146
147
148 static ssize_t pccard_show_irq_mask(struct device *dev,
149                                     struct device_attribute *attr,
150                                     char *buf)
151 {
152         struct pcmcia_socket *s = to_socket(dev);
153         return sprintf(buf, "0x%04x\n", s->irq_mask);
154 }
155
156 static ssize_t pccard_store_irq_mask(struct device *dev,
157                                      struct device_attribute *attr,
158                                      const char *buf, size_t count)
159 {
160         ssize_t ret;
161         struct pcmcia_socket *s = to_socket(dev);
162         u32 mask;
163
164         if (!count)
165                 return -EINVAL;
166
167         ret = sscanf(buf, "0x%x\n", &mask);
168
169         if (ret == 1) {
170                 s->irq_mask &= mask;
171                 ret = 0;
172         }
173
174         return ret ? ret : count;
175 }
176 static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
177
178
179 static ssize_t pccard_show_resource(struct device *dev,
180                                     struct device_attribute *attr, char *buf)
181 {
182         struct pcmcia_socket *s = to_socket(dev);
183         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
184 }
185
186 static ssize_t pccard_store_resource(struct device *dev,
187                                      struct device_attribute *attr,
188                                      const char *buf, size_t count)
189 {
190         unsigned long flags;
191         struct pcmcia_socket *s = to_socket(dev);
192
193         if (!count)
194                 return -EINVAL;
195
196         spin_lock_irqsave(&s->lock, flags);
197         if (!s->resource_setup_done)
198                 s->resource_setup_done = 1;
199         spin_unlock_irqrestore(&s->lock, flags);
200
201         mutex_lock(&s->skt_mutex);
202         if ((s->callback) &&
203             (s->state & SOCKET_PRESENT) &&
204             !(s->state & SOCKET_CARDBUS)) {
205                 if (try_module_get(s->callback->owner)) {
206                         s->callback->requery(s, 0);
207                         module_put(s->callback->owner);
208                 }
209         }
210         mutex_unlock(&s->skt_mutex);
211
212         return count;
213 }
214 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
215
216
217 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
218 {
219         tuple_t tuple;
220         int status, i;
221         loff_t pointer = 0;
222         ssize_t ret = 0;
223         u_char *tuplebuffer;
224         u_char *tempbuffer;
225
226         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
227         if (!tuplebuffer)
228                 return -ENOMEM;
229
230         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
231         if (!tempbuffer) {
232                 ret = -ENOMEM;
233                 goto free_tuple;
234         }
235
236         memset(&tuple, 0, sizeof(tuple_t));
237
238         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
239         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
240         tuple.TupleOffset = 0;
241
242         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
243         while (!status) {
244                 tuple.TupleData = tuplebuffer;
245                 tuple.TupleDataMax = 255;
246                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
247
248                 status = pccard_get_tuple_data(s, &tuple);
249                 if (status)
250                         break;
251
252                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
253                         tempbuffer[0] = tuple.TupleCode & 0xff;
254                         tempbuffer[1] = tuple.TupleLink & 0xff;
255                         for (i = 0; i < tuple.TupleDataLen; i++)
256                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
257
258                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
259                                 if (((i + pointer) >= off) &&
260                                     (i + pointer) < (off + count)) {
261                                         buf[ret] = tempbuffer[i];
262                                         ret++;
263                                 }
264                         }
265                 }
266
267                 pointer += 2 + tuple.TupleDataLen;
268
269                 if (pointer >= (off + count))
270                         break;
271
272                 if (tuple.TupleCode == CISTPL_END)
273                         break;
274                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
275         }
276
277         kfree(tempbuffer);
278  free_tuple:
279         kfree(tuplebuffer);
280
281         return ret;
282 }
283
284 static ssize_t pccard_show_cis(struct kobject *kobj,
285                                struct bin_attribute *bin_attr,
286                                char *buf, loff_t off, size_t count)
287 {
288         unsigned int size = 0x200;
289
290         if (off >= size)
291                 count = 0;
292         else {
293                 struct pcmcia_socket *s;
294                 unsigned int chains;
295
296                 if (off + count > size)
297                         count = size - off;
298
299                 s = to_socket(container_of(kobj, struct device, kobj));
300
301                 if (!(s->state & SOCKET_PRESENT))
302                         return -ENODEV;
303                 if (pccard_validate_cis(s, &chains))
304                         return -EIO;
305                 if (!chains)
306                         return -ENODATA;
307
308                 count = pccard_extract_cis(s, buf, off, count);
309         }
310
311         return count;
312 }
313
314 static ssize_t pccard_store_cis(struct kobject *kobj,
315                                 struct bin_attribute *bin_attr,
316                                 char *buf, loff_t off, size_t count)
317 {
318         struct pcmcia_socket *s = to_socket(container_of(kobj, struct device, kobj));
319         int error;
320
321         if (off)
322                 return -EINVAL;
323
324         if (count >= CISTPL_MAX_CIS_SIZE)
325                 return -EINVAL;
326
327         if (!(s->state & SOCKET_PRESENT))
328                 return -ENODEV;
329
330         error = pcmcia_replace_cis(s, buf, count);
331         if (error)
332                 return -EIO;
333
334         mutex_lock(&s->skt_mutex);
335         if ((s->callback) && (s->state & SOCKET_PRESENT) &&
336             !(s->state & SOCKET_CARDBUS)) {
337                 if (try_module_get(s->callback->owner)) {
338                         s->callback->requery(s, 1);
339                         module_put(s->callback->owner);
340                 }
341         }
342         mutex_unlock(&s->skt_mutex);
343
344         return count;
345 }
346
347
348 static struct attribute *pccard_socket_attributes[] = {
349         &dev_attr_card_type.attr,
350         &dev_attr_card_voltage.attr,
351         &dev_attr_card_vpp.attr,
352         &dev_attr_card_vcc.attr,
353         &dev_attr_card_insert.attr,
354         &dev_attr_card_pm_state.attr,
355         &dev_attr_card_eject.attr,
356         &dev_attr_card_irq_mask.attr,
357         &dev_attr_available_resources_setup_done.attr,
358         NULL,
359 };
360
361 static const struct attribute_group socket_attrs = {
362         .attrs = pccard_socket_attributes,
363 };
364
365 static struct bin_attribute pccard_cis_attr = {
366         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
367         .size = 0x200,
368         .read = pccard_show_cis,
369         .write = pccard_store_cis,
370 };
371
372 int pccard_sysfs_add_socket(struct device *dev)
373 {
374         int ret = 0;
375
376         ret = sysfs_create_group(&dev->kobj, &socket_attrs);
377         if (!ret) {
378                 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
379                 if (ret)
380                         sysfs_remove_group(&dev->kobj, &socket_attrs);
381         }
382         return ret;
383 }
384
385 void pccard_sysfs_remove_socket(struct device *dev)
386 {
387         sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
388         sysfs_remove_group(&dev->kobj, &socket_attrs);
389 }