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         ssize_t ret;
  92         struct pcmcia_socket *s = to_socket(dev);
  93
  94         if (!count)
  95                 return -EINVAL;
  96
  97         ret = pcmcia_insert_card(s);
  98
  99         return ret ? ret : count;
 100 }
 101 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 102
 103
 104 static ssize_t pccard_show_card_pm_state(struct device *dev,
 105                                          struct device_attribute *attr,
 106                                          char *buf)
 107 {
 108         struct pcmcia_socket *s = to_socket(dev);
 109         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
 110 }
 111
 112 static ssize_t pccard_store_card_pm_state(struct device *dev,
 113                                           struct device_attribute *attr,
 114                                           const char *buf, size_t count)
 115 {
 116         ssize_t ret = -EINVAL;
 117         struct pcmcia_socket *s = to_socket(dev);
 118
 119         if (!count)
 120                 return -EINVAL;
 121
 122         if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
 123                 ret = pcmcia_suspend_card(s);
 124         else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
 125                 ret = pcmcia_resume_card(s);
 126
 127         return ret ? -ENODEV : count;
 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         ssize_t ret;
 136         struct pcmcia_socket *s = to_socket(dev);
 137
 138         if (!count)
 139                 return -EINVAL;
 140
 141         ret = pcmcia_eject_card(s);
 142
 143         return ret ? ret : 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                 s->irq_mask &= mask;
 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         unsigned long flags;
 191         struct pcmcia_socket *s = to_socket(dev);
 192
 193         if (!count)
 194                 return -EINVAL;
 195
 196         spin_lock_irqsave(&s->lock, flags);
 197         if (!s->resource_setup_done)
 198                 s->resource_setup_done = 1;
 199         spin_unlock_irqrestore(&s->lock, flags);
 200
 201         mutex_lock(&s->skt_mutex);
 202         if ((s->callback) &&
 203             (s->state & SOCKET_PRESENT) &&
 204             !(s->state & SOCKET_CARDBUS)) {
 205                 if (try_module_get(s->callback->owner)) {
 206                         s->callback->requery(s, 0);
 207                         module_put(s->callback->owner);
 208                 }
 209         }
 210         mutex_unlock(&s->skt_mutex);
 211
 212         return count;
 213 }
 214 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 215
 216
 217 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
 218 {
 219         tuple_t tuple;
 220         int status, i;
 221         loff_t pointer = 0;
 222         ssize_t ret = 0;
 223         u_char *tuplebuffer;
 224         u_char *tempbuffer;
 225
 226         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
 227         if (!tuplebuffer)
 228                 return -ENOMEM;
 229
 230         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
 231         if (!tempbuffer) {
 232                 ret = -ENOMEM;
 233                 goto free_tuple;
 234         }
 235
 236         memset(&tuple, 0, sizeof(tuple_t));
 237
 238         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
 239         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
 240         tuple.TupleOffset = 0;
 241
 242         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
 243         while (!status) {
 244                 tuple.TupleData = tuplebuffer;
 245                 tuple.TupleDataMax = 255;
 246                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
 247
 248                 status = pccard_get_tuple_data(s, &tuple);
 249                 if (status)
 250                         break;
 251
 252                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
 253                         tempbuffer[0] = tuple.TupleCode & 0xff;
 254                         tempbuffer[1] = tuple.TupleLink & 0xff;
 255                         for (i = 0; i < tuple.TupleDataLen; i++)
 256                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
 257
 258                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
 259                                 if (((i + pointer) >= off) &&
 260                                     (i + pointer) < (off + count)) {
 261                                         buf[ret] = tempbuffer[i];
 262                                         ret++;
 263                                 }
 264                         }
 265                 }
 266
 267                 pointer += 2 + tuple.TupleDataLen;
 268
 269                 if (pointer >= (off + count))
 270                         break;
 271
 272                 if (tuple.TupleCode == CISTPL_END)
 273                         break;
 274                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
 275         }
 276
 277         kfree(tempbuffer);
 278  free_tuple:
 279         kfree(tuplebuffer);
 280
 281         return ret;
 282 }
 283
 284 static ssize_t pccard_show_cis(struct kobject *kobj,
 285                                struct bin_attribute *bin_attr,
 286                                char *buf, loff_t off, size_t count)
 287 {
 288         unsigned int size = 0x200;
 289
 290         if (off >= size)
 291                 count = 0;
 292         else {
 293                 struct pcmcia_socket *s;
 294                 unsigned int chains;
 295
 296                 if (off + count > size)
 297                         count = size - off;
 298
 299                 s = to_socket(container_of(kobj, struct device, kobj));
 300
 301                 if (!(s->state & SOCKET_PRESENT))
 302                         return -ENODEV;
 303                 if (pccard_validate_cis(s, &chains))
 304                         return -EIO;
 305                 if (!chains)
 306                         return -ENODATA;
 307
 308                 count = pccard_extract_cis(s, buf, off, count);
 309         }
 310
 311         return count;
 312 }
 313
 314 static ssize_t pccard_store_cis(struct kobject *kobj,
 315                                 struct bin_attribute *bin_attr,
 316                                 char *buf, loff_t off, size_t count)
 317 {
 318         struct pcmcia_socket *s = to_socket(container_of(kobj, struct device, kobj));
 319         int error;
 320
 321         if (off)
 322                 return -EINVAL;
 323
 324         if (count >= CISTPL_MAX_CIS_SIZE)
 325                 return -EINVAL;
 326
 327         if (!(s->state & SOCKET_PRESENT))
 328                 return -ENODEV;
 329
 330         error = pcmcia_replace_cis(s, buf, count);
 331         if (error)
 332                 return -EIO;
 333
 334         mutex_lock(&s->skt_mutex);
 335         if ((s->callback) && (s->state & SOCKET_PRESENT) &&
 336             !(s->state & SOCKET_CARDBUS)) {
 337                 if (try_module_get(s->callback->owner)) {
 338                         s->callback->requery(s, 1);
 339                         module_put(s->callback->owner);
 340                 }
 341         }
 342         mutex_unlock(&s->skt_mutex);
 343
 344         return count;
 345 }
 346
 347
 348 static struct attribute *pccard_socket_attributes[] = {
 349         &dev_attr_card_type.attr,
 350         &dev_attr_card_voltage.attr,
 351         &dev_attr_card_vpp.attr,
 352         &dev_attr_card_vcc.attr,
 353         &dev_attr_card_insert.attr,
 354         &dev_attr_card_pm_state.attr,
 355         &dev_attr_card_eject.attr,
 356         &dev_attr_card_irq_mask.attr,
 357         &dev_attr_available_resources_setup_done.attr,
 358         NULL,
 359 };
 360
 361 static const struct attribute_group socket_attrs = {
 362         .attrs = pccard_socket_attributes,
 363 };
 364
 365 static struct bin_attribute pccard_cis_attr = {
 366         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
 367         .size = 0x200,
 368         .read = pccard_show_cis,
 369         .write = pccard_store_cis,
 370 };
 371
 372 int pccard_sysfs_add_socket(struct device *dev)
 373 {
 374         int ret = 0;
 375
 376         ret = sysfs_create_group(&dev->kobj, &socket_attrs);
 377         if (!ret) {
 378                 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
 379                 if (ret)
 380                         sysfs_remove_group(&dev->kobj, &socket_attrs);
 381         }
 382         return ret;
 383 }
 384
 385 void pccard_sysfs_remove_socket(struct device *dev)
 386 {
 387         sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
 388         sysfs_remove_group(&dev->kobj, &socket_attrs);
 389 }