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