socket_sysfs.c revision c5081d5f4775b2a3f858f91151bbf9163e473075 
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#define IN_CARD_SERVICES
31#include <pcmcia/cs_types.h>
32#include <pcmcia/ss.h>
33#include <pcmcia/cs.h>
34#include <pcmcia/bulkmem.h>
35#include <pcmcia/cistpl.h>
36#include <pcmcia/cisreg.h>
37#include <pcmcia/ds.h>
38#include "cs_internal.h"
39
40#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
41
42static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
43				char *buf)
44{
45	struct pcmcia_socket *s = to_socket(dev);
46
47	if (!(s->state & SOCKET_PRESENT))
48		return -ENODEV;
49	if (s->state & SOCKET_CARDBUS)
50		return sprintf(buf, "32-bit\n");
51	return sprintf(buf, "16-bit\n");
52}
53static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
54
55static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
56				   char *buf)
57{
58	struct pcmcia_socket *s = to_socket(dev);
59
60	if (!(s->state & SOCKET_PRESENT))
61		return -ENODEV;
62	if (s->socket.Vcc)
63		return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
64			       s->socket.Vcc % 10);
65	return sprintf(buf, "X.XV\n");
66}
67static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
68
69static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
70			       char *buf)
71{
72	struct pcmcia_socket *s = to_socket(dev);
73	if (!(s->state & SOCKET_PRESENT))
74		return -ENODEV;
75	return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
76}
77static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
78
79static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
80			       char *buf)
81{
82	struct pcmcia_socket *s = to_socket(dev);
83	if (!(s->state & SOCKET_PRESENT))
84		return -ENODEV;
85	return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
86}
87static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
88
89
90static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
91				   const char *buf, size_t count)
92{
93	ssize_t ret;
94	struct pcmcia_socket *s = to_socket(dev);
95
96	if (!count)
97		return -EINVAL;
98
99	ret = pcmcia_insert_card(s);
100
101	return ret ? ret : count;
102}
103static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
104
105
106static ssize_t pccard_show_card_pm_state(struct device *dev,
107					 struct device_attribute *attr,
108					 char *buf)
109{
110	struct pcmcia_socket *s = to_socket(dev);
111	return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
112}
113
114static ssize_t pccard_store_card_pm_state(struct device *dev,
115					  struct device_attribute *attr,
116					  const char *buf, size_t count)
117{
118	ssize_t ret = -EINVAL;
119	struct pcmcia_socket *s = to_socket(dev);
120
121	if (!count)
122		return -EINVAL;
123
124	if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
125		ret = pcmcia_suspend_card(s);
126	else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
127		ret = pcmcia_resume_card(s);
128
129	return ret ? -ENODEV : count;
130}
131static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
132
133static ssize_t pccard_store_eject(struct device *dev,
134				  struct device_attribute *attr,
135				  const char *buf, size_t count)
136{
137	ssize_t ret;
138	struct pcmcia_socket *s = to_socket(dev);
139
140	if (!count)
141		return -EINVAL;
142
143	ret = pcmcia_eject_card(s);
144
145	return ret ? ret : count;
146}
147static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
148
149
150static ssize_t pccard_show_irq_mask(struct device *dev,
151				    struct device_attribute *attr,
152				    char *buf)
153{
154	struct pcmcia_socket *s = to_socket(dev);
155	return sprintf(buf, "0x%04x\n", s->irq_mask);
156}
157
158static ssize_t pccard_store_irq_mask(struct device *dev,
159				     struct device_attribute *attr,
160				     const char *buf, size_t count)
161{
162	ssize_t ret;
163	struct pcmcia_socket *s = to_socket(dev);
164	u32 mask;
165
166	if (!count)
167		return -EINVAL;
168
169	ret = sscanf (buf, "0x%x\n", &mask);
170
171	if (ret == 1) {
172		s->irq_mask &= mask;
173		ret = 0;
174	}
175
176	return ret ? ret : count;
177}
178static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
179
180
181static ssize_t pccard_show_resource(struct device *dev,
182				    struct device_attribute *attr, char *buf)
183{
184	struct pcmcia_socket *s = to_socket(dev);
185	return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
186}
187
188static ssize_t pccard_store_resource(struct device *dev,
189				     struct device_attribute *attr,
190				     const char *buf, size_t count)
191{
192	unsigned long flags;
193	struct pcmcia_socket *s = to_socket(dev);
194
195	if (!count)
196		return -EINVAL;
197
198	spin_lock_irqsave(&s->lock, flags);
199	if (!s->resource_setup_done)
200		s->resource_setup_done = 1;
201	spin_unlock_irqrestore(&s->lock, flags);
202
203	mutex_lock(&s->skt_mutex);
204	if ((s->callback) &&
205	    (s->state & SOCKET_PRESENT) &&
206	    !(s->state & SOCKET_CARDBUS)) {
207		if (try_module_get(s->callback->owner)) {
208			s->callback->requery(s, 0);
209			module_put(s->callback->owner);
210		}
211	}
212	mutex_unlock(&s->skt_mutex);
213
214	return count;
215}
216static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
217
218
219static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
220{
221	tuple_t tuple;
222	int status, i;
223	loff_t pointer = 0;
224	ssize_t ret = 0;
225	u_char *tuplebuffer;
226	u_char *tempbuffer;
227
228	tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
229	if (!tuplebuffer)
230		return -ENOMEM;
231
232	tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
233	if (!tempbuffer) {
234		ret = -ENOMEM;
235		goto free_tuple;
236	}
237
238	memset(&tuple, 0, sizeof(tuple_t));
239
240	tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
241	tuple.DesiredTuple = RETURN_FIRST_TUPLE;
242	tuple.TupleOffset = 0;
243
244	status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
245	while (!status) {
246		tuple.TupleData = tuplebuffer;
247		tuple.TupleDataMax = 255;
248		memset(tuplebuffer, 0, sizeof(u_char) * 255);
249
250		status = pccard_get_tuple_data(s, &tuple);
251		if (status)
252			break;
253
254		if (off < (pointer + 2 + tuple.TupleDataLen)) {
255			tempbuffer[0] = tuple.TupleCode & 0xff;
256			tempbuffer[1] = tuple.TupleLink & 0xff;
257			for (i = 0; i < tuple.TupleDataLen; i++)
258				tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
259
260			for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
261				if (((i + pointer) >= off) &&
262				    (i + pointer) < (off + count)) {
263					buf[ret] = tempbuffer[i];
264					ret++;
265				}
266			}
267		}
268
269		pointer += 2 + tuple.TupleDataLen;
270
271		if (pointer >= (off + count))
272			break;
273
274		if (tuple.TupleCode == CISTPL_END)
275			break;
276		status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
277	}
278
279	kfree(tempbuffer);
280 free_tuple:
281	kfree(tuplebuffer);
282
283	return (ret);
284}
285
286static ssize_t pccard_show_cis(struct kobject *kobj,
287			       struct bin_attribute *bin_attr,
288			       char *buf, loff_t off, size_t count)
289{
290	unsigned int size = 0x200;
291
292	if (off >= size)
293		count = 0;
294	else {
295		struct pcmcia_socket *s;
296		unsigned int chains;
297
298		if (off + count > size)
299			count = size - off;
300
301		s = to_socket(container_of(kobj, struct device, kobj));
302
303		if (!(s->state & SOCKET_PRESENT))
304			return -ENODEV;
305		if (pccard_validate_cis(s, BIND_FN_ALL, &chains))
306			return -EIO;
307		if (!chains)
308			return -ENODATA;
309
310		count = pccard_extract_cis(s, buf, off, count);
311	}
312
313	return (count);
314}
315
316static ssize_t pccard_store_cis(struct kobject *kobj,
317				struct bin_attribute *bin_attr,
318				char *buf, loff_t off, size_t count)
319{
320	struct pcmcia_socket *s = to_socket(container_of(kobj, struct device, kobj));
321	cisdump_t *cis;
322	int error;
323
324	if (off)
325		return -EINVAL;
326
327	if (count >= 0x200)
328		return -EINVAL;
329
330	if (!(s->state & SOCKET_PRESENT))
331		return -ENODEV;
332
333	cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
334	if (!cis)
335		return -ENOMEM;
336
337	cis->Length = count + 1;
338	memcpy(cis->Data, buf, count);
339
340	error = pcmcia_replace_cis(s, cis);
341	kfree(cis);
342	if (error)
343		return -EIO;
344
345	mutex_lock(&s->skt_mutex);
346	if ((s->callback) && (s->state & SOCKET_PRESENT) &&
347	    !(s->state & SOCKET_CARDBUS)) {
348		if (try_module_get(s->callback->owner)) {
349			s->callback->requery(s, 1);
350			module_put(s->callback->owner);
351		}
352	}
353	mutex_unlock(&s->skt_mutex);
354
355	return count;
356}
357
358
359static struct attribute *pccard_socket_attributes[] = {
360	&dev_attr_card_type.attr,
361	&dev_attr_card_voltage.attr,
362	&dev_attr_card_vpp.attr,
363	&dev_attr_card_vcc.attr,
364	&dev_attr_card_insert.attr,
365	&dev_attr_card_pm_state.attr,
366	&dev_attr_card_eject.attr,
367	&dev_attr_card_irq_mask.attr,
368	&dev_attr_available_resources_setup_done.attr,
369	NULL,
370};
371
372static const struct attribute_group socket_attrs = {
373	.attrs = pccard_socket_attributes,
374};
375
376static struct bin_attribute pccard_cis_attr = {
377	.attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
378	.size = 0x200,
379	.read = pccard_show_cis,
380	.write = pccard_store_cis,
381};
382
383int pccard_sysfs_add_socket(struct device *dev)
384{
385	int ret = 0;
386
387	ret = sysfs_create_group(&dev->kobj, &socket_attrs);
388	if (!ret) {
389		ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
390		if (ret)
391			sysfs_remove_group(&dev->kobj, &socket_attrs);
392	}
393	return ret;
394}
395
396void pccard_sysfs_remove_socket(struct device *dev)
397{
398	sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
399	sysfs_remove_group(&dev->kobj, &socket_attrs);
400}
401