socket_sysfs.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * socket_sysfs.c -- most of socket-related sysfs output
  4 *
  5 * (C) 2003 - 2004		Dominik Brodowski
  6 */
  7
  8#include <linux/module.h>
  9#include <linux/moduleparam.h>
 10#include <linux/init.h>
 11#include <linux/kernel.h>
 12#include <linux/string.h>
 13#include <linux/string_choices.h>
 14#include <linux/major.h>
 15#include <linux/errno.h>
 16#include <linux/mm.h>
 17#include <linux/interrupt.h>
 18#include <linux/timer.h>
 19#include <linux/ioport.h>
 20#include <linux/delay.h>
 21#include <linux/pm.h>
 22#include <linux/device.h>
 23#include <linux/mutex.h>
 24#include <asm/irq.h>
 25
 26#include <pcmcia/ss.h>
 27#include <pcmcia/cistpl.h>
 28#include <pcmcia/cisreg.h>
 29#include <pcmcia/ds.h>
 30#include "cs_internal.h"
 31
 32#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
 33
 34static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
 35				char *buf)
 36{
 37	struct pcmcia_socket *s = to_socket(dev);
 38
 39	if (!(s->state & SOCKET_PRESENT))
 40		return -ENODEV;
 41	if (s->state & SOCKET_CARDBUS)
 42		return sysfs_emit(buf, "32-bit\n");
 43	return sysfs_emit(buf, "16-bit\n");
 44}
 45static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
 46
 47static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
 48				   char *buf)
 49{
 50	struct pcmcia_socket *s = to_socket(dev);
 51
 52	if (!(s->state & SOCKET_PRESENT))
 53		return -ENODEV;
 54	if (s->socket.Vcc)
 55		return sysfs_emit(buf, "%d.%dV\n", s->socket.Vcc / 10,
 56			       s->socket.Vcc % 10);
 57	return sysfs_emit(buf, "X.XV\n");
 58}
 59static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
 60
 61static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
 62			       char *buf)
 63{
 64	struct pcmcia_socket *s = to_socket(dev);
 65	if (!(s->state & SOCKET_PRESENT))
 66		return -ENODEV;
 67	return sysfs_emit(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
 68}
 69static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
 70
 71static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
 72			       char *buf)
 73{
 74	struct pcmcia_socket *s = to_socket(dev);
 75	if (!(s->state & SOCKET_PRESENT))
 76		return -ENODEV;
 77	return sysfs_emit(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
 78}
 79static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
 80
 81
 82static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
 83				   const char *buf, size_t count)
 84{
 85	struct pcmcia_socket *s = to_socket(dev);
 86
 87	if (!count)
 88		return -EINVAL;
 89
 90	pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
 91
 92	return count;
 93}
 94static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 95
 96
 97static ssize_t pccard_show_card_pm_state(struct device *dev,
 98					 struct device_attribute *attr,
 99					 char *buf)
100{
101	struct pcmcia_socket *s = to_socket(dev);
102	return sysfs_emit(buf, "%s\n", str_off_on(s->state & SOCKET_SUSPEND));
103}
104
105static ssize_t pccard_store_card_pm_state(struct device *dev,
106					  struct device_attribute *attr,
107					  const char *buf, size_t count)
108{
109	struct pcmcia_socket *s = to_socket(dev);
110	ssize_t ret = count;
111
112	if (!count)
113		return -EINVAL;
114
115	if (!strncmp(buf, "off", 3))
116		pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
117	else {
118		if (!strncmp(buf, "on", 2))
119			pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
120		else
121			ret = -EINVAL;
122	}
123
124	return ret;
125}
126static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
127
128static ssize_t pccard_store_eject(struct device *dev,
129				  struct device_attribute *attr,
130				  const char *buf, size_t count)
131{
132	struct pcmcia_socket *s = to_socket(dev);
133
134	if (!count)
135		return -EINVAL;
136
137	pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
138
139	return count;
140}
141static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
142
143
144static ssize_t pccard_show_irq_mask(struct device *dev,
145				    struct device_attribute *attr,
146				    char *buf)
147{
148	struct pcmcia_socket *s = to_socket(dev);
149	return sysfs_emit(buf, "0x%04x\n", s->irq_mask);
150}
151
152static ssize_t pccard_store_irq_mask(struct device *dev,
153				     struct device_attribute *attr,
154				     const char *buf, size_t count)
155{
156	ssize_t ret;
157	struct pcmcia_socket *s = to_socket(dev);
158	u32 mask;
159
160	if (!count)
161		return -EINVAL;
162
163	ret = sscanf(buf, "0x%x\n", &mask);
164
165	if (ret == 1) {
166		mutex_lock(&s->ops_mutex);
167		s->irq_mask &= mask;
168		mutex_unlock(&s->ops_mutex);
169		ret = 0;
170	}
171
172	return ret ? ret : count;
173}
174static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
175
176
177static ssize_t pccard_show_resource(struct device *dev,
178				    struct device_attribute *attr, char *buf)
179{
180	struct pcmcia_socket *s = to_socket(dev);
181	return sysfs_emit(buf, "%s\n", str_yes_no(s->resource_setup_done));
182}
183
184static ssize_t pccard_store_resource(struct device *dev,
185				     struct device_attribute *attr,
186				     const char *buf, size_t count)
187{
188	struct pcmcia_socket *s = to_socket(dev);
189
190	if (!count)
191		return -EINVAL;
192
193	mutex_lock(&s->ops_mutex);
194	if (!s->resource_setup_done)
195		s->resource_setup_done = 1;
196	mutex_unlock(&s->ops_mutex);
197
198	pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
199
200	return count;
201}
202static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
203
204static struct attribute *pccard_socket_attributes[] = {
205	&dev_attr_card_type.attr,
206	&dev_attr_card_voltage.attr,
207	&dev_attr_card_vpp.attr,
208	&dev_attr_card_vcc.attr,
209	&dev_attr_card_insert.attr,
210	&dev_attr_card_pm_state.attr,
211	&dev_attr_card_eject.attr,
212	&dev_attr_card_irq_mask.attr,
213	&dev_attr_available_resources_setup_done.attr,
214	NULL,
215};
216
217static const struct attribute_group socket_attrs = {
218	.attrs = pccard_socket_attributes,
219};
220
221int pccard_sysfs_add_socket(struct device *dev)
222{
223	return sysfs_create_group(&dev->kobj, &socket_attrs);
224}
225
226void pccard_sysfs_remove_socket(struct device *dev)
227{
228	sysfs_remove_group(&dev->kobj, &socket_attrs);
229}