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/mm.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/timer.h>
  21 #include <linux/ioport.h>
  22 #include <linux/delay.h>
  23 #include <linux/pm.h>
  24 #include <linux/device.h>
  25 #include <linux/mutex.h>
  26 #include <asm/system.h>
  27 #include <asm/irq.h>
  28
  29 #include <pcmcia/cs_types.h>
  30 #include <pcmcia/ss.h>
  31 #include <pcmcia/cs.h>
  32 #include <pcmcia/cistpl.h>
  33 #include <pcmcia/cisreg.h>
  34 #include <pcmcia/ds.h>
  35 #include "cs_internal.h"
  36
  37 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  38
  39 static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
  40                                 char *buf)
  41 {
  42         struct pcmcia_socket *s = to_socket(dev);
  43
  44         if (!(s->state & SOCKET_PRESENT))
  45                 return -ENODEV;
  46         if (s->state & SOCKET_CARDBUS)
  47                 return sprintf(buf, "32-bit\n");
  48         return sprintf(buf, "16-bit\n");
  49 }
  50 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  51
  52 static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
  53                                    char *buf)
  54 {
  55         struct pcmcia_socket *s = to_socket(dev);
  56
  57         if (!(s->state & SOCKET_PRESENT))
  58                 return -ENODEV;
  59         if (s->socket.Vcc)
  60                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  61                                s->socket.Vcc % 10);
  62         return sprintf(buf, "X.XV\n");
  63 }
  64 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  65
  66 static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
  67                                char *buf)
  68 {
  69         struct pcmcia_socket *s = to_socket(dev);
  70         if (!(s->state & SOCKET_PRESENT))
  71                 return -ENODEV;
  72         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  73 }
  74 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  75
  76 static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
  77                                char *buf)
  78 {
  79         struct pcmcia_socket *s = to_socket(dev);
  80         if (!(s->state & SOCKET_PRESENT))
  81                 return -ENODEV;
  82         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  83 }
  84 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  85
  86
  87 static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
  88                                    const char *buf, size_t count)
  89 {
  90         struct pcmcia_socket *s = to_socket(dev);
  91
  92         if (!count)
  93                 return -EINVAL;
  94
  95         pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
  96
  97         return count;
  98 }
  99 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 100
 101
 102 static ssize_t pccard_show_card_pm_state(struct device *dev,
 103                                          struct device_attribute *attr,
 104                                          char *buf)
 105 {
 106         struct pcmcia_socket *s = to_socket(dev);
 107         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
 108 }
 109
 110 static ssize_t pccard_store_card_pm_state(struct device *dev,
 111                                           struct device_attribute *attr,
 112                                           const char *buf, size_t count)
 113 {
 114         struct pcmcia_socket *s = to_socket(dev);
 115         ssize_t ret = count;
 116
 117         if (!count)
 118                 return -EINVAL;
 119
 120         if (!strncmp(buf, "off", 3))
 121                 pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
 122         else {
 123                 if (!strncmp(buf, "on", 2))
 124                         pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
 125                 else
 126                         ret = -EINVAL;
 127         }
 128
 129         return ret;
 130 }
 131 static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
 132
 133 static ssize_t pccard_store_eject(struct device *dev,
 134                                   struct device_attribute *attr,
 135                                   const char *buf, size_t count)
 136 {
 137         struct pcmcia_socket *s = to_socket(dev);
 138
 139         if (!count)
 140                 return -EINVAL;
 141
 142         pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
 143
 144         return count;
 145 }
 146 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 147
 148
 149 static ssize_t pccard_show_irq_mask(struct device *dev,
 150                                     struct device_attribute *attr,
 151                                     char *buf)
 152 {
 153         struct pcmcia_socket *s = to_socket(dev);
 154         return sprintf(buf, "0x%04x\n", s->irq_mask);
 155 }
 156
 157 static ssize_t pccard_store_irq_mask(struct device *dev,
 158                                      struct device_attribute *attr,
 159                                      const char *buf, size_t count)
 160 {
 161         ssize_t ret;
 162         struct pcmcia_socket *s = to_socket(dev);
 163         u32 mask;
 164
 165         if (!count)
 166                 return -EINVAL;
 167
 168         ret = sscanf(buf, "0x%x\n", &mask);
 169
 170         if (ret == 1) {
 171                 mutex_lock(&s->ops_mutex);
 172                 s->irq_mask &= mask;
 173                 mutex_unlock(&s->ops_mutex);
 174                 ret = 0;
 175         }
 176
 177         return ret ? ret : count;
 178 }
 179 static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 180
 181
 182 static ssize_t pccard_show_resource(struct device *dev,
 183                                     struct device_attribute *attr, char *buf)
 184 {
 185         struct pcmcia_socket *s = to_socket(dev);
 186         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 187 }
 188
 189 static ssize_t pccard_store_resource(struct device *dev,
 190                                      struct device_attribute *attr,
 191                                      const char *buf, size_t count)
 192 {
 193         struct pcmcia_socket *s = to_socket(dev);
 194
 195         if (!count)
 196                 return -EINVAL;
 197
 198         mutex_lock(&s->ops_mutex);
 199         if (!s->resource_setup_done)
 200                 s->resource_setup_done = 1;
 201         mutex_unlock(&s->ops_mutex);
 202
 203         pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 204
 205         return count;
 206 }
 207 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 208
 209 static struct attribute *pccard_socket_attributes[] = {
 210         &dev_attr_card_type.attr,
 211         &dev_attr_card_voltage.attr,
 212         &dev_attr_card_vpp.attr,
 213         &dev_attr_card_vcc.attr,
 214         &dev_attr_card_insert.attr,
 215         &dev_attr_card_pm_state.attr,
 216         &dev_attr_card_eject.attr,
 217         &dev_attr_card_irq_mask.attr,
 218         &dev_attr_available_resources_setup_done.attr,
 219         NULL,
 220 };
 221
 222 static const struct attribute_group socket_attrs = {
 223         .attrs = pccard_socket_attributes,
 224 };
 225
 226 int pccard_sysfs_add_socket(struct device *dev)
 227 {
 228         return sysfs_create_group(&dev->kobj, &socket_attrs);
 229 }
 230
 231 void pccard_sysfs_remove_socket(struct device *dev)
 232 {
 233         sysfs_remove_group(&dev->kobj, &socket_attrs);
 234 }