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 device *dev, struct device_attribute *attr,
  44                                 char *buf)
  45 {
  46         struct pcmcia_socket *s = to_socket(dev);
  47
  48         if (!(s->state & SOCKET_PRESENT))
  49                 return -ENODEV;
  50         if (s->state & SOCKET_CARDBUS)
  51                 return sprintf(buf, "32-bit\n");
  52         return sprintf(buf, "16-bit\n");
  53 }
  54 static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  55
  56 static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
  57                                    char *buf)
  58 {
  59         struct pcmcia_socket *s = to_socket(dev);
  60
  61         if (!(s->state & SOCKET_PRESENT))
  62                 return -ENODEV;
  63         if (s->socket.Vcc)
  64                 return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  65                                s->socket.Vcc % 10);
  66         return sprintf(buf, "X.XV\n");
  67 }
  68 static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  69
  70 static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
  71                                char *buf)
  72 {
  73         struct pcmcia_socket *s = to_socket(dev);
  74         if (!(s->state & SOCKET_PRESENT))
  75                 return -ENODEV;
  76         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  77 }
  78 static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  79
  80 static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
  81                                char *buf)
  82 {
  83         struct pcmcia_socket *s = to_socket(dev);
  84         if (!(s->state & SOCKET_PRESENT))
  85                 return -ENODEV;
  86         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  87 }
  88 static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  89
  90
  91 static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
  92                                    const char *buf, size_t count)
  93 {
  94         ssize_t ret;
  95         struct pcmcia_socket *s = to_socket(dev);
  96
  97         if (!count)
  98                 return -EINVAL;
  99
 100         ret = pcmcia_insert_card(s);
 101
 102         return ret ? ret : count;
 103 }
 104 static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 105
 106
 107 static ssize_t pccard_show_card_pm_state(struct device *dev,
 108                                          struct device_attribute *attr,
 109                                          char *buf)
 110 {
 111         struct pcmcia_socket *s = to_socket(dev);
 112         return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
 113 }
 114
 115 static ssize_t pccard_store_card_pm_state(struct device *dev,
 116                                           struct device_attribute *attr,
 117                                           const char *buf, size_t count)
 118 {
 119         ssize_t ret = -EINVAL;
 120         struct pcmcia_socket *s = to_socket(dev);
 121
 122         if (!count)
 123                 return -EINVAL;
 124
 125         if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
 126                 ret = pcmcia_suspend_card(s);
 127         else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
 128                 ret = pcmcia_resume_card(s);
 129
 130         return ret ? -ENODEV : count;
 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         ssize_t ret;
 139         struct pcmcia_socket *s = to_socket(dev);
 140
 141         if (!count)
 142                 return -EINVAL;
 143
 144         ret = pcmcia_eject_card(s);
 145
 146         return ret ? ret : count;
 147 }
 148 static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 149
 150
 151 static ssize_t pccard_show_irq_mask(struct device *dev,
 152                                     struct device_attribute *attr,
 153                                     char *buf)
 154 {
 155         struct pcmcia_socket *s = to_socket(dev);
 156         return sprintf(buf, "0x%04x\n", s->irq_mask);
 157 }
 158
 159 static ssize_t pccard_store_irq_mask(struct device *dev,
 160                                      struct device_attribute *attr,
 161                                      const char *buf, size_t count)
 162 {
 163         ssize_t ret;
 164         struct pcmcia_socket *s = to_socket(dev);
 165         u32 mask;
 166
 167         if (!count)
 168                 return -EINVAL;
 169
 170         ret = sscanf (buf, "0x%x\n", &mask);
 171
 172         if (ret == 1) {
 173                 s->irq_mask &= mask;
 174                 ret = 0;
 175         }
 176
 177         return ret ? ret : count;
 178 }
 179 static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 180
 181
 182 static ssize_t pccard_show_resource(struct device *dev,
 183                                     struct device_attribute *attr, char *buf)
 184 {
 185         struct pcmcia_socket *s = to_socket(dev);
 186         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 187 }
 188
 189 static ssize_t pccard_store_resource(struct device *dev,
 190                                      struct device_attribute *attr,
 191                                      const char *buf, size_t count)
 192 {
 193         unsigned long flags;
 194         struct pcmcia_socket *s = to_socket(dev);
 195
 196         if (!count)
 197                 return -EINVAL;
 198
 199         spin_lock_irqsave(&s->lock, flags);
 200         if (!s->resource_setup_done)
 201                 s->resource_setup_done = 1;
 202         spin_unlock_irqrestore(&s->lock, flags);
 203
 204         mutex_lock(&s->skt_mutex);
 205         if ((s->callback) &&
 206             (s->state & SOCKET_PRESENT) &&
 207             !(s->state & SOCKET_CARDBUS)) {
 208                 if (try_module_get(s->callback->owner)) {
 209                         s->callback->requery(s, 0);
 210                         module_put(s->callback->owner);
 211                 }
 212         }
 213         mutex_unlock(&s->skt_mutex);
 214
 215         return count;
 216 }
 217 static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 218
 219
 220 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
 221 {
 222         tuple_t tuple;
 223         int status, i;
 224         loff_t pointer = 0;
 225         ssize_t ret = 0;
 226         u_char *tuplebuffer;
 227         u_char *tempbuffer;
 228
 229         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
 230         if (!tuplebuffer)
 231                 return -ENOMEM;
 232
 233         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
 234         if (!tempbuffer) {
 235                 ret = -ENOMEM;
 236                 goto free_tuple;
 237         }
 238
 239         memset(&tuple, 0, sizeof(tuple_t));
 240
 241         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
 242         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
 243         tuple.TupleOffset = 0;
 244
 245         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
 246         while (!status) {
 247                 tuple.TupleData = tuplebuffer;
 248                 tuple.TupleDataMax = 255;
 249                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
 250
 251                 status = pccard_get_tuple_data(s, &tuple);
 252                 if (status)
 253                         break;
 254
 255                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
 256                         tempbuffer[0] = tuple.TupleCode & 0xff;
 257                         tempbuffer[1] = tuple.TupleLink & 0xff;
 258                         for (i = 0; i < tuple.TupleDataLen; i++)
 259                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
 260
 261                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
 262                                 if (((i + pointer) >= off) &&
 263                                     (i + pointer) < (off + count)) {
 264                                         buf[ret] = tempbuffer[i];
 265                                         ret++;
 266                                 }
 267                         }
 268                 }
 269
 270                 pointer += 2 + tuple.TupleDataLen;
 271
 272                 if (pointer >= (off + count))
 273                         break;
 274
 275                 if (tuple.TupleCode == CISTPL_END)
 276                         break;
 277                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
 278         }
 279
 280         kfree(tempbuffer);
 281  free_tuple:
 282         kfree(tuplebuffer);
 283
 284         return (ret);
 285 }
 286
 287 static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 288 {
 289         unsigned int size = 0x200;
 290
 291         if (off >= size)
 292                 count = 0;
 293         else {
 294                 struct pcmcia_socket *s;
 295                 cisinfo_t cisinfo;
 296
 297                 if (off + count > size)
 298                         count = size - off;
 299
 300                 s = to_socket(container_of(kobj, struct device, kobj));
 301
 302                 if (!(s->state & SOCKET_PRESENT))
 303                         return -ENODEV;
 304                 if (pccard_validate_cis(s, BIND_FN_ALL, &cisinfo))
 305                         return -EIO;
 306                 if (!cisinfo.Chains)
 307                         return -ENODATA;
 308
 309                 count = pccard_extract_cis(s, buf, off, count);
 310         }
 311
 312         return (count);
 313 }
 314
 315 static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 316 {
 317         struct pcmcia_socket *s = to_socket(container_of(kobj, struct device, kobj));
 318         cisdump_t *cis;
 319         int error;
 320
 321         if (off)
 322                 return -EINVAL;
 323
 324         if (count >= 0x200)
 325                 return -EINVAL;
 326
 327         if (!(s->state & SOCKET_PRESENT))
 328                 return -ENODEV;
 329
 330         cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
 331         if (!cis)
 332                 return -ENOMEM;
 333
 334         cis->Length = count + 1;
 335         memcpy(cis->Data, buf, count);
 336
 337         error = pcmcia_replace_cis(s, cis);
 338         kfree(cis);
 339         if (error)
 340                 return -EIO;
 341
 342         mutex_lock(&s->skt_mutex);
 343         if ((s->callback) && (s->state & SOCKET_PRESENT) &&
 344             !(s->state & SOCKET_CARDBUS)) {
 345                 if (try_module_get(s->callback->owner)) {
 346                         s->callback->requery(s, 1);
 347                         module_put(s->callback->owner);
 348                 }
 349         }
 350         mutex_unlock(&s->skt_mutex);
 351
 352         return count;
 353 }
 354
 355
 356 static struct device_attribute *pccard_socket_attributes[] = {
 357         &dev_attr_card_type,
 358         &dev_attr_card_voltage,
 359         &dev_attr_card_vpp,
 360         &dev_attr_card_vcc,
 361         &dev_attr_card_insert,
 362         &dev_attr_card_pm_state,
 363         &dev_attr_card_eject,
 364         &dev_attr_card_irq_mask,
 365         &dev_attr_available_resources_setup_done,
 366         NULL,
 367 };
 368
 369 static struct bin_attribute pccard_cis_attr = {
 370         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR, .owner = THIS_MODULE},
 371         .size = 0x200,
 372         .read = pccard_show_cis,
 373         .write = pccard_store_cis,
 374 };
 375
 376 static int __devinit pccard_sysfs_add_socket(struct device *dev,
 377                                              struct class_interface *class_intf)
 378 {
 379         struct device_attribute **attr;
 380         int ret = 0;
 381
 382         for (attr = pccard_socket_attributes; *attr; attr++) {
 383                 ret = device_create_file(dev, *attr);
 384                 if (ret)
 385                         break;
 386         }
 387         if (!ret)
 388                 ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
 389
 390         return ret;
 391 }
 392
 393 static void __devexit pccard_sysfs_remove_socket(struct device *dev,
 394                                                  struct class_interface *class_intf)
 395 {
 396         struct device_attribute **attr;
 397
 398         sysfs_remove_bin_file(&dev->kobj, &pccard_cis_attr);
 399         for (attr = pccard_socket_attributes; *attr; attr++)
 400                 device_remove_file(dev, *attr);
 401 }
 402
 403 struct class_interface pccard_sysfs_interface = {
 404         .class = &pcmcia_socket_class,
 405         .add_dev = &pccard_sysfs_add_socket,
 406         .remove_dev = __devexit_p(&pccard_sysfs_remove_socket),
 407 };