release/src-rt-6.x.4708/linux/linux-2.6.36/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/cs.h>
  31 #include <pcmcia/cistpl.h>
  32 #include <pcmcia/cisreg.h>
  33 #include <pcmcia/ds.h>
  34 #include "cs_internal.h"
  35
  36 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  37
  38 static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
  39                                 char *buf)
  40 {
  41         struct pcmcia_socket *s = to_socket(dev);
  42
  43         if (!(s->state & SOCKET_PRESENT))
  44                 return -ENODEV;
  45         if (s->state & SOCKET_CARDBUS)
  46                 return sprintf(buf, "32-bit\n");
  47         return sprintf(buf, "16-bit\n");
  48 }
  49 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  50
  51 static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
  52                                    char *buf)
  53 {
  54         struct pcmcia_socket *s = to_socket(dev);
  55
  56         if (!(s->state & SOCKET_PRESENT))
  57                 return -ENODEV;
  58         if (s->socket.Vcc)
  59                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  60                                s->socket.Vcc % 10);
  61         return sprintf(buf, "X.XV\n");
  62 }
  63 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  64
  65 static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
  66                                char *buf)
  67 {
  68         struct pcmcia_socket *s = to_socket(dev);
  69         if (!(s->state & SOCKET_PRESENT))
  70                 return -ENODEV;
  71         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  72 }
  73 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  74
  75 static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
  76                                char *buf)
  77 {
  78         struct pcmcia_socket *s = to_socket(dev);
  79         if (!(s->state & SOCKET_PRESENT))
  80                 return -ENODEV;
  81         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  82 }
  83 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  84
  85
  86 static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
  87                                    const char *buf, size_t count)
  88 {
  89         struct pcmcia_socket *s = to_socket(dev);
  90
  91         if (!count)
  92                 return -EINVAL;
  93
  94         pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
  95
  96         return count;
  97 }
  98 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
  99
 100
 101 static ssize_t pccard_show_card_pm_state(struct device *dev,
 102                                          struct device_attribute *attr,
 103                                          char *buf)
 104 {
 105         struct pcmcia_socket *s = to_socket(dev);
 106         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
 107 }
 108
 109 static ssize_t pccard_store_card_pm_state(struct device *dev,
 110                                           struct device_attribute *attr,
 111                                           const char *buf, size_t count)
 112 {
 113         struct pcmcia_socket *s = to_socket(dev);
 114         ssize_t ret = count;
 115
 116         if (!count)
 117                 return -EINVAL;
 118
 119         if (!strncmp(buf, "off", 3))
 120                 pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
 121         else {
 122                 if (!strncmp(buf, "on", 2))
 123                         pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
 124                 else
 125                         ret = -EINVAL;
 126         }
 127
 128         return ret;
 129 }
 130 static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
 131
 132 static ssize_t pccard_store_eject(struct device *dev,
 133                                   struct device_attribute *attr,
 134                                   const char *buf, size_t count)
 135 {
 136         struct pcmcia_socket *s = to_socket(dev);
 137
 138         if (!count)
 139                 return -EINVAL;
 140
 141         pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
 142
 143         return count;
 144 }
 145 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 146
 147
 148 static ssize_t pccard_show_irq_mask(struct device *dev,
 149                                     struct device_attribute *attr,
 150                                     char *buf)
 151 {
 152         struct pcmcia_socket *s = to_socket(dev);
 153         return sprintf(buf, "0x%04x\n", s->irq_mask);
 154 }
 155
 156 static ssize_t pccard_store_irq_mask(struct device *dev,
 157                                      struct device_attribute *attr,
 158                                      const char *buf, size_t count)
 159 {
 160         ssize_t ret;
 161         struct pcmcia_socket *s = to_socket(dev);
 162         u32 mask;
 163
 164         if (!count)
 165                 return -EINVAL;
 166
 167         ret = sscanf(buf, "0x%x\n", &mask);
 168
 169         if (ret == 1) {
 170                 mutex_lock(&s->ops_mutex);
 171                 s->irq_mask &= mask;
 172                 mutex_unlock(&s->ops_mutex);
 173                 ret = 0;
 174         }
 175
 176         return ret ? ret : count;
 177 }
 178 static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 179
 180
 181 static ssize_t pccard_show_resource(struct device *dev,
 182                                     struct device_attribute *attr, char *buf)
 183 {
 184         struct pcmcia_socket *s = to_socket(dev);
 185         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 186 }
 187
 188 static ssize_t pccard_store_resource(struct device *dev,
 189                                      struct device_attribute *attr,
 190                                      const char *buf, size_t count)
 191 {
 192         struct pcmcia_socket *s = to_socket(dev);
 193
 194         if (!count)
 195                 return -EINVAL;
 196
 197         mutex_lock(&s->ops_mutex);
 198         if (!s->resource_setup_done)
 199                 s->resource_setup_done = 1;
 200         mutex_unlock(&s->ops_mutex);
 201
 202         pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 203
 204         return count;
 205 }
 206 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 207
 208 static struct attribute *pccard_socket_attributes[] = {
 209         &dev_attr_card_type.attr,
 210         &dev_attr_card_voltage.attr,
 211         &dev_attr_card_vpp.attr,
 212         &dev_attr_card_vcc.attr,
 213         &dev_attr_card_insert.attr,
 214         &dev_attr_card_pm_state.attr,
 215         &dev_attr_card_eject.attr,
 216         &dev_attr_card_irq_mask.attr,
 217         &dev_attr_available_resources_setup_done.attr,
 218         NULL,
 219 };
 220
 221 static const struct attribute_group socket_attrs = {
 222         .attrs = pccard_socket_attributes,
 223 };
 224
 225 int pccard_sysfs_add_socket(struct device *dev)
 226 {
 227         return sysfs_create_group(&dev->kobj, &socket_attrs);
 228 }
 229
 230 void pccard_sysfs_remove_socket(struct device *dev)
 231 {
 232         sysfs_remove_group(&dev->kobj, &socket_attrs);
 233 }