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/pci.h>
  26 #include <linux/device.h>
  27 #include <linux/mutex.h>
  28 #include <asm/system.h>
  29 #include <asm/irq.h>
  30
  31 #define IN_CARD_SERVICES
  32 #include <pcmcia/cs_types.h>
  33 #include <pcmcia/ss.h>
  34 #include <pcmcia/cs.h>
  35 #include <pcmcia/bulkmem.h>
  36 #include <pcmcia/cistpl.h>
  37 #include <pcmcia/cisreg.h>
  38 #include <pcmcia/ds.h>
  39 #include "cs_internal.h"
  40
  41 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  42
  43 static ssize_t pccard_show_type(struct class_device *dev, char *buf)
  44 {
  45         struct pcmcia_socket *s = to_socket(dev);
  46
  47         if (!(s->state & SOCKET_PRESENT))
  48                 return -ENODEV;
  49         if (s->state & SOCKET_CARDBUS)
  50                 return sprintf(buf, "32-bit\n");
  51         return sprintf(buf, "16-bit\n");
  52 }
  53 static CLASS_DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  54
  55 static ssize_t pccard_show_voltage(struct class_device *dev, char *buf)
  56 {
  57         struct pcmcia_socket *s = to_socket(dev);
  58
  59         if (!(s->state & SOCKET_PRESENT))
  60                 return -ENODEV;
  61         if (s->socket.Vcc)
  62                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  63                                s->socket.Vcc % 10);
  64         return sprintf(buf, "X.XV\n");
  65 }
  66 static CLASS_DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  67
  68 static ssize_t pccard_show_vpp(struct class_device *dev, 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 CLASS_DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  76
  77 static ssize_t pccard_show_vcc(struct class_device *dev, char *buf)
  78 {
  79         struct pcmcia_socket *s = to_socket(dev);
  80         if (!(s->state & SOCKET_PRESENT))
  81                 return -ENODEV;
  82         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  83 }
  84 static CLASS_DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  85
  86
  87 static ssize_t pccard_store_insert(struct class_device *dev, const char *buf, size_t count)
  88 {
  89         ssize_t ret;
  90         struct pcmcia_socket *s = to_socket(dev);
  91
  92         if (!count)
  93                 return -EINVAL;
  94
  95         ret = pcmcia_insert_card(s);
  96
  97         return ret ? ret : count;
  98 }
  99 static CLASS_DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 100
 101
 102 static ssize_t pccard_show_card_pm_state(struct class_device *dev, 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 class_device *dev, const char *buf, size_t count)
 109 {
 110         ssize_t ret = -EINVAL;
 111         struct pcmcia_socket *s = to_socket(dev);
 112
 113         if (!count)
 114                 return -EINVAL;
 115
 116         if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
 117                 ret = pcmcia_suspend_card(s);
 118         else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
 119                 ret = pcmcia_resume_card(s);
 120
 121         return ret ? -ENODEV : count;
 122 }
 123 static CLASS_DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
 124
 125 static ssize_t pccard_store_eject(struct class_device *dev, const char *buf, size_t count)
 126 {
 127         ssize_t ret;
 128         struct pcmcia_socket *s = to_socket(dev);
 129
 130         if (!count)
 131                 return -EINVAL;
 132
 133         ret = pcmcia_eject_card(s);
 134
 135         return ret ? ret : count;
 136 }
 137 static CLASS_DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 138
 139
 140 static ssize_t pccard_show_irq_mask(struct class_device *dev, char *buf)
 141 {
 142         struct pcmcia_socket *s = to_socket(dev);
 143         return sprintf(buf, "0x%04x\n", s->irq_mask);
 144 }
 145
 146 static ssize_t pccard_store_irq_mask(struct class_device *dev, const char *buf, size_t count)
 147 {
 148         ssize_t ret;
 149         struct pcmcia_socket *s = to_socket(dev);
 150         u32 mask;
 151
 152         if (!count)
 153                 return -EINVAL;
 154
 155         ret = sscanf (buf, "0x%x\n", &mask);
 156
 157         if (ret == 1) {
 158                 s->irq_mask &= mask;
 159                 ret = 0;
 160         }
 161
 162         return ret ? ret : count;
 163 }
 164 static CLASS_DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 165
 166
 167 static ssize_t pccard_show_resource(struct class_device *dev, char *buf)
 168 {
 169         struct pcmcia_socket *s = to_socket(dev);
 170         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 171 }
 172
 173 static ssize_t pccard_store_resource(struct class_device *dev, const char *buf, size_t count)
 174 {
 175         unsigned long flags;
 176         struct pcmcia_socket *s = to_socket(dev);
 177
 178         if (!count)
 179                 return -EINVAL;
 180
 181         spin_lock_irqsave(&s->lock, flags);
 182         if (!s->resource_setup_done)
 183                 s->resource_setup_done = 1;
 184         spin_unlock_irqrestore(&s->lock, flags);
 185
 186         mutex_lock(&s->skt_mutex);
 187         if ((s->callback) &&
 188             (s->state & SOCKET_PRESENT) &&
 189             !(s->state & SOCKET_CARDBUS)) {
 190                 if (try_module_get(s->callback->owner)) {
 191                         s->callback->requery(s);
 192                         module_put(s->callback->owner);
 193                 }
 194         }
 195         mutex_unlock(&s->skt_mutex);
 196
 197         return count;
 198 }
 199 static CLASS_DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 200
 201
 202 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
 203 {
 204         tuple_t tuple;
 205         int status, i;
 206         loff_t pointer = 0;
 207         ssize_t ret = 0;
 208         u_char *tuplebuffer;
 209         u_char *tempbuffer;
 210
 211         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
 212         if (!tuplebuffer)
 213                 return -ENOMEM;
 214
 215         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
 216         if (!tempbuffer) {
 217                 ret = -ENOMEM;
 218                 goto free_tuple;
 219         }
 220
 221         memset(&tuple, 0, sizeof(tuple_t));
 222
 223         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
 224         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
 225         tuple.TupleOffset = 0;
 226
 227         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
 228         while (!status) {
 229                 tuple.TupleData = tuplebuffer;
 230                 tuple.TupleDataMax = 255;
 231                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
 232
 233                 status = pccard_get_tuple_data(s, &tuple);
 234                 if (status)
 235                         break;
 236
 237                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
 238                         tempbuffer[0] = tuple.TupleCode & 0xff;
 239                         tempbuffer[1] = tuple.TupleLink & 0xff;
 240                         for (i = 0; i < tuple.TupleDataLen; i++)
 241                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
 242
 243                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
 244                                 if (((i + pointer) >= off) &&
 245                                     (i + pointer) < (off + count)) {
 246                                         buf[ret] = tempbuffer[i];
 247                                         ret++;
 248                                 }
 249                         }
 250                 }
 251
 252                 pointer += 2 + tuple.TupleDataLen;
 253
 254                 if (pointer >= (off + count))
 255                         break;
 256
 257                 if (tuple.TupleCode == CISTPL_END)
 258                         break;
 259                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
 260         }
 261
 262         kfree(tempbuffer);
 263  free_tuple:
 264         kfree(tuplebuffer);
 265
 266         return (ret);
 267 }
 268
 269 static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 270 {
 271         unsigned int size = 0x200;
 272
 273         if (off >= size)
 274                 count = 0;
 275         else {
 276                 struct pcmcia_socket *s;
 277                 cisinfo_t cisinfo;
 278
 279                 if (off + count > size)
 280                         count = size - off;
 281
 282                 s = to_socket(container_of(kobj, struct class_device, kobj));
 283
 284                 if (!(s->state & SOCKET_PRESENT))
 285                         return -ENODEV;
 286                 if (pccard_validate_cis(s, BIND_FN_ALL, &cisinfo))
 287                         return -EIO;
 288                 if (!cisinfo.Chains)
 289                         return -ENODATA;
 290
 291                 count = pccard_extract_cis(s, buf, off, count);
 292         }
 293
 294         return (count);
 295 }
 296
 297 static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 298 {
 299         struct pcmcia_socket *s = to_socket(container_of(kobj, struct class_device, kobj));
 300         cisdump_t *cis;
 301         int error;
 302
 303         if (off)
 304                 return -EINVAL;
 305
 306         if (count >= 0x200)
 307                 return -EINVAL;
 308
 309         if (!(s->state & SOCKET_PRESENT))
 310                 return -ENODEV;
 311
 312         cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
 313         if (!cis)
 314                 return -ENOMEM;
 315
 316         cis->Length = count + 1;
 317         memcpy(cis->Data, buf, count);
 318
 319         error = pcmcia_replace_cis(s, cis);
 320         kfree(cis);
 321         if (error)
 322                 return -EIO;
 323
 324         mutex_lock(&s->skt_mutex);
 325         if ((s->callback) && (s->state & SOCKET_PRESENT) &&
 326             !(s->state & SOCKET_CARDBUS)) {
 327                 if (try_module_get(s->callback->owner)) {
 328                         s->callback->requery(s);
 329                         module_put(s->callback->owner);
 330                 }
 331         }
 332         mutex_unlock(&s->skt_mutex);
 333
 334         return count;
 335 }
 336
 337
 338 static struct class_device_attribute *pccard_socket_attributes[] = {
 339         &class_device_attr_card_type,
 340         &class_device_attr_card_voltage,
 341         &class_device_attr_card_vpp,
 342         &class_device_attr_card_vcc,
 343         &class_device_attr_card_insert,
 344         &class_device_attr_card_pm_state,
 345         &class_device_attr_card_eject,
 346         &class_device_attr_card_irq_mask,
 347         &class_device_attr_available_resources_setup_done,
 348         NULL,
 349 };
 350
 351 static struct bin_attribute pccard_cis_attr = {
 352         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR, .owner = THIS_MODULE},
 353         .size = 0x200,
 354         .read = pccard_show_cis,
 355         .write = pccard_store_cis,
 356 };
 357
 358 static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev,
 359                                              struct class_interface *class_intf)
 360 {
 361         struct class_device_attribute **attr;
 362         int ret = 0;
 363
 364         for (attr = pccard_socket_attributes; *attr; attr++) {
 365                 ret = class_device_create_file(class_dev, *attr);
 366                 if (ret)
 367                         break;
 368         }
 369         if (!ret)
 370                 ret = sysfs_create_bin_file(&class_dev->kobj, &pccard_cis_attr);
 371
 372         return ret;
 373 }
 374
 375 static void __devexit pccard_sysfs_remove_socket(struct class_device *class_dev,
 376                                                  struct class_interface *class_intf)
 377 {
 378         struct class_device_attribute **attr;
 379
 380         sysfs_remove_bin_file(&class_dev->kobj, &pccard_cis_attr);
 381         for (attr = pccard_socket_attributes; *attr; attr++)
 382                 class_device_remove_file(class_dev, *attr);
 383 }
 384
 385 struct class_interface pccard_sysfs_interface = {
 386         .class = &pcmcia_socket_class,
 387         .add = &pccard_sysfs_add_socket,
 388         .remove = __devexit_p(&pccard_sysfs_remove_socket),
 389 };