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
pccard_show_type(struct device * dev,struct device_attribute * attr,char * buf)34 static 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 }
45 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
46
pccard_show_voltage(struct device * dev,struct device_attribute * attr,char * buf)47 static 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 }
59 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
60
pccard_show_vpp(struct device * dev,struct device_attribute * attr,char * buf)61 static 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 }
69 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
70
pccard_show_vcc(struct device * dev,struct device_attribute * attr,char * buf)71 static 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 }
79 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
80
81
pccard_store_insert(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)82 static 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 }
94 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
95
96
pccard_show_card_pm_state(struct device * dev,struct device_attribute * attr,char * buf)97 static 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
pccard_store_card_pm_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)105 static 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 }
126 static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
127
pccard_store_eject(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)128 static 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 }
141 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
142
143
pccard_show_irq_mask(struct device * dev,struct device_attribute * attr,char * buf)144 static 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
pccard_store_irq_mask(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)152 static 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 }
174 static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
175
176
pccard_show_resource(struct device * dev,struct device_attribute * attr,char * buf)177 static 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
pccard_store_resource(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)184 static 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 }
202 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
203
204 static 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
217 static const struct attribute_group socket_attrs = {
218 .attrs = pccard_socket_attributes,
219 };
220
pccard_sysfs_add_socket(struct device * dev)221 int pccard_sysfs_add_socket(struct device *dev)
222 {
223 return sysfs_create_group(&dev->kobj, &socket_attrs);
224 }
225
pccard_sysfs_remove_socket(struct device * dev)226 void pccard_sysfs_remove_socket(struct device *dev)
227 {
228 sysfs_remove_group(&dev->kobj, &socket_attrs);
229 }
230