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/irq.h>
  27
  28 #include <pcmcia/ss.h>
  29 #include <pcmcia/cistpl.h>
  30 #include <pcmcia/cisreg.h>
  31 #include <pcmcia/ds.h>
  32 #include "cs_internal.h"
  33
  34 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  35
  36 static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
  37                                 char *buf)
  38 {
  39         struct pcmcia_socket *s = to_socket(dev);
  40
  41         if (!(s->state & SOCKET_PRESENT))
  42                 return -ENODEV;
  43         if (s->state & SOCKET_CARDBUS)
  44                 return sprintf(buf, "32-bit\n");
  45         return sprintf(buf, "16-bit\n");
  46 }
  47 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  48
  49 static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
  50                                    char *buf)
  51 {
  52         struct pcmcia_socket *s = to_socket(dev);
  53
  54         if (!(s->state & SOCKET_PRESENT))
  55                 return -ENODEV;
  56         if (s->socket.Vcc)
  57                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  58                                s->socket.Vcc % 10);
  59         return sprintf(buf, "X.XV\n");
  60 }
  61 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  62
  63 static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
  64                                char *buf)
  65 {
  66         struct pcmcia_socket *s = to_socket(dev);
  67         if (!(s->state & SOCKET_PRESENT))
  68                 return -ENODEV;
  69         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  70 }
  71 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  72
  73 static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
  74                                char *buf)
  75 {
  76         struct pcmcia_socket *s = to_socket(dev);
  77         if (!(s->state & SOCKET_PRESENT))
  78                 return -ENODEV;
  79         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  80 }
  81 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  82
  83
  84 static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
  85                                    const char *buf, size_t count)
  86 {
  87         struct pcmcia_socket *s = to_socket(dev);
  88
  89         if (!count)
  90                 return -EINVAL;
  91
  92         pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
  93
  94         return count;
  95 }
  96 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
  97
  98
  99 static ssize_t pccard_show_card_pm_state(struct device *dev,
 100                                          struct device_attribute *attr,
 101                                          char *buf)
 102 {
 103         struct pcmcia_socket *s = to_socket(dev);
 104         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
 105 }
 106
 107 static ssize_t pccard_store_card_pm_state(struct device *dev,
 108                                           struct device_attribute *attr,
 109                                           const char *buf, size_t count)
 110 {
 111         struct pcmcia_socket *s = to_socket(dev);
 112         ssize_t ret = count;
 113
 114         if (!count)
 115                 return -EINVAL;
 116
 117         if (!strncmp(buf, "off", 3))
 118                 pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
 119         else {
 120                 if (!strncmp(buf, "on", 2))
 121                         pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
 122                 else
 123                         ret = -EINVAL;
 124         }
 125
 126         return ret;
 127 }
 128 static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
 129
 130 static ssize_t pccard_store_eject(struct device *dev,
 131                                   struct device_attribute *attr,
 132                                   const char *buf, size_t count)
 133 {
 134         struct pcmcia_socket *s = to_socket(dev);
 135
 136         if (!count)
 137                 return -EINVAL;
 138
 139         pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
 140
 141         return count;
 142 }
 143 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 144
 145
 146 static ssize_t pccard_show_irq_mask(struct device *dev,
 147                                     struct device_attribute *attr,
 148                                     char *buf)
 149 {
 150         struct pcmcia_socket *s = to_socket(dev);
 151         return sprintf(buf, "0x%04x\n", s->irq_mask);
 152 }
 153
 154 static ssize_t pccard_store_irq_mask(struct device *dev,
 155                                      struct device_attribute *attr,
 156                                      const char *buf, size_t count)
 157 {
 158         ssize_t ret;
 159         struct pcmcia_socket *s = to_socket(dev);
 160         u32 mask;
 161
 162         if (!count)
 163                 return -EINVAL;
 164
 165         ret = sscanf(buf, "0x%x\n", &mask);
 166
 167         if (ret == 1) {
 168                 mutex_lock(&s->ops_mutex);
 169                 s->irq_mask &= mask;
 170                 mutex_unlock(&s->ops_mutex);
 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         struct pcmcia_socket *s = to_socket(dev);
 191
 192         if (!count)
 193                 return -EINVAL;
 194
 195         mutex_lock(&s->ops_mutex);
 196         if (!s->resource_setup_done)
 197                 s->resource_setup_done = 1;
 198         mutex_unlock(&s->ops_mutex);
 199
 200         pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 201
 202         return count;
 203 }
 204 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 205
 206 static struct attribute *pccard_socket_attributes[] = {
 207         &dev_attr_card_type.attr,
 208         &dev_attr_card_voltage.attr,
 209         &dev_attr_card_vpp.attr,
 210         &dev_attr_card_vcc.attr,
 211         &dev_attr_card_insert.attr,
 212         &dev_attr_card_pm_state.attr,
 213         &dev_attr_card_eject.attr,
 214         &dev_attr_card_irq_mask.attr,
 215         &dev_attr_available_resources_setup_done.attr,
 216         NULL,
 217 };
 218
 219 static const struct attribute_group socket_attrs = {
 220         .attrs = pccard_socket_attributes,
 221 };
 222
 223 int pccard_sysfs_add_socket(struct device *dev)
 224 {
 225         return sysfs_create_group(&dev->kobj, &socket_attrs);
 226 }
 227
 228 void pccard_sysfs_remove_socket(struct device *dev)
 229 {
 230         sysfs_remove_group(&dev->kobj, &socket_attrs);
 231 }