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/slab.h>
  19 #include <linux/mm.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/timer.h>
  22 #include <linux/ioport.h>
  23 #include <linux/delay.h>
  24 #include <linux/pm.h>
  25 #include <linux/device.h>
  26 #include <linux/mutex.h>
  27 #include <asm/system.h>
  28 #include <asm/irq.h>
  29
  30 #include <pcmcia/cs_types.h>
  31 #include <pcmcia/ss.h>
  32 #include <pcmcia/cs.h>
  33 #include <pcmcia/cistpl.h>
  34 #include <pcmcia/cisreg.h>
  35 #include <pcmcia/ds.h>
  36 #include "cs_internal.h"
  37
  38 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  39
  40 static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
  41                                 char *buf)
  42 {
  43         struct pcmcia_socket *s = to_socket(dev);
  44
  45         if (!(s->state & SOCKET_PRESENT))
  46                 return -ENODEV;
  47         if (s->state & SOCKET_CARDBUS)
  48                 return sprintf(buf, "32-bit\n");
  49         return sprintf(buf, "16-bit\n");
  50 }
  51 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  52
  53 static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
  54                                    char *buf)
  55 {
  56         struct pcmcia_socket *s = to_socket(dev);
  57
  58         if (!(s->state & SOCKET_PRESENT))
  59                 return -ENODEV;
  60         if (s->socket.Vcc)
  61                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  62                                s->socket.Vcc % 10);
  63         return sprintf(buf, "X.XV\n");
  64 }
  65 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  66
  67 static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
  68                                char *buf)
  69 {
  70         struct pcmcia_socket *s = to_socket(dev);
  71         if (!(s->state & SOCKET_PRESENT))
  72                 return -ENODEV;
  73         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  74 }
  75 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  76
  77 static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
  78                                char *buf)
  79 {
  80         struct pcmcia_socket *s = to_socket(dev);
  81         if (!(s->state & SOCKET_PRESENT))
  82                 return -ENODEV;
  83         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  84 }
  85 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  86
  87
  88 static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
  89                                    const char *buf, size_t count)
  90 {
  91         struct pcmcia_socket *s = to_socket(dev);
  92
  93         if (!count)
  94                 return -EINVAL;
  95
  96         pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
  97
  98         return count;
  99 }
 100 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 101
 102
 103 static ssize_t pccard_show_card_pm_state(struct device *dev,
 104                                          struct device_attribute *attr,
 105                                          char *buf)
 106 {
 107         struct pcmcia_socket *s = to_socket(dev);
 108         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
 109 }
 110
 111 static ssize_t pccard_store_card_pm_state(struct device *dev,
 112                                           struct device_attribute *attr,
 113                                           const char *buf, size_t count)
 114 {
 115         struct pcmcia_socket *s = to_socket(dev);
 116         ssize_t ret = count;
 117
 118         if (!count)
 119                 return -EINVAL;
 120
 121         if (!strncmp(buf, "off", 3))
 122                 pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
 123         else {
 124                 if (!strncmp(buf, "on", 2))
 125                         pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
 126                 else
 127                         ret = -EINVAL;
 128         }
 129
 130         return ret;
 131 }
 132 static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
 133
 134 static ssize_t pccard_store_eject(struct device *dev,
 135                                   struct device_attribute *attr,
 136                                   const char *buf, size_t count)
 137 {
 138         struct pcmcia_socket *s = to_socket(dev);
 139
 140         if (!count)
 141                 return -EINVAL;
 142
 143         pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
 144
 145         return count;
 146 }
 147 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 148
 149
 150 static ssize_t pccard_show_irq_mask(struct device *dev,
 151                                     struct device_attribute *attr,
 152                                     char *buf)
 153 {
 154         struct pcmcia_socket *s = to_socket(dev);
 155         return sprintf(buf, "0x%04x\n", s->irq_mask);
 156 }
 157
 158 static ssize_t pccard_store_irq_mask(struct device *dev,
 159                                      struct device_attribute *attr,
 160                                      const char *buf, size_t count)
 161 {
 162         ssize_t ret;
 163         struct pcmcia_socket *s = to_socket(dev);
 164         u32 mask;
 165
 166         if (!count)
 167                 return -EINVAL;
 168
 169         ret = sscanf(buf, "0x%x\n", &mask);
 170
 171         if (ret == 1) {
 172                 mutex_lock(&s->ops_mutex);
 173                 s->irq_mask &= mask;
 174                 mutex_unlock(&s->ops_mutex);
 175                 ret = 0;
 176         }
 177
 178         return ret ? ret : count;
 179 }
 180 static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 181
 182
 183 static ssize_t pccard_show_resource(struct device *dev,
 184                                     struct device_attribute *attr, char *buf)
 185 {
 186         struct pcmcia_socket *s = to_socket(dev);
 187         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 188 }
 189
 190 static ssize_t pccard_store_resource(struct device *dev,
 191                                      struct device_attribute *attr,
 192                                      const char *buf, size_t count)
 193 {
 194         struct pcmcia_socket *s = to_socket(dev);
 195
 196         if (!count)
 197                 return -EINVAL;
 198
 199         mutex_lock(&s->ops_mutex);
 200         if (!s->resource_setup_done)
 201                 s->resource_setup_done = 1;
 202         mutex_unlock(&s->ops_mutex);
 203
 204         pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
 205
 206         return count;
 207 }
 208 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 209
 210 static struct attribute *pccard_socket_attributes[] = {
 211         &dev_attr_card_type.attr,
 212         &dev_attr_card_voltage.attr,
 213         &dev_attr_card_vpp.attr,
 214         &dev_attr_card_vcc.attr,
 215         &dev_attr_card_insert.attr,
 216         &dev_attr_card_pm_state.attr,
 217         &dev_attr_card_eject.attr,
 218         &dev_attr_card_irq_mask.attr,
 219         &dev_attr_available_resources_setup_done.attr,
 220         NULL,
 221 };
 222
 223 static const struct attribute_group socket_attrs = {
 224         .attrs = pccard_socket_attributes,
 225 };
 226
 227 int pccard_sysfs_add_socket(struct device *dev)
 228 {
 229         return sysfs_create_group(&dev->kobj, &socket_attrs);
 230 }
 231
 232 void pccard_sysfs_remove_socket(struct device *dev)
 233 {
 234         sysfs_remove_group(&dev->kobj, &socket_attrs);
 235 }