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/config.h>
  16 #include <linux/string.h>
  17 #include <linux/major.h>
  18 #include <linux/errno.h>
  19 #include <linux/slab.h>
  20 #include <linux/mm.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/timer.h>
  23 #include <linux/ioport.h>
  24 #include <linux/delay.h>
  25 #include <linux/pm.h>
  26 #include <linux/pci.h>
  27 #include <linux/device.h>
  28 #include <asm/system.h>
  29 #include <asm/irq.h>
  30
  31 #define IN_CARD_SERVICES
  32 #include <pcmcia/version.h>
  33 #include <pcmcia/cs_types.h>
  34 #include <pcmcia/ss.h>
  35 #include <pcmcia/cs.h>
  36 #include <pcmcia/bulkmem.h>
  37 #include <pcmcia/cistpl.h>
  38 #include <pcmcia/cisreg.h>
  39 #include <pcmcia/ds.h>
  40 #include "cs_internal.h"
  41
  42 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  43
  44 static ssize_t pccard_show_type(struct class_device *dev, char *buf)
  45 {
  46         int val;
  47         struct pcmcia_socket *s = to_socket(dev);
  48
  49         if (!(s->state & SOCKET_PRESENT))
  50                 return -ENODEV;
  51         s->ops->get_status(s, &val);
  52         if (val & SS_CARDBUS)
  53                 return sprintf(buf, "32-bit\n");
  54         if (val & SS_DETECT)
  55                 return sprintf(buf, "16-bit\n");
  56         return sprintf(buf, "invalid\n");
  57 }
  58 static CLASS_DEVICE_ATTR(card_type, 0400, pccard_show_type, NULL);
  59
  60 static ssize_t pccard_show_voltage(struct class_device *dev, char *buf)
  61 {
  62         int val;
  63         struct pcmcia_socket *s = to_socket(dev);
  64
  65         if (!(s->state & SOCKET_PRESENT))
  66                 return -ENODEV;
  67         s->ops->get_status(s, &val);
  68         if (val & SS_3VCARD)
  69                 return sprintf(buf, "3.3V\n");
  70         if (val & SS_XVCARD)
  71                 return sprintf(buf, "X.XV\n");
  72         return sprintf(buf, "5.0V\n");
  73 }
  74 static CLASS_DEVICE_ATTR(card_voltage, 0400, pccard_show_voltage, NULL);
  75
  76 static ssize_t pccard_show_vpp(struct class_device *dev, 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.Vpp / 10, s->socket.Vpp % 10);
  82 }
  83 static CLASS_DEVICE_ATTR(card_vpp, 0400, pccard_show_vpp, NULL);
  84
  85 static ssize_t pccard_show_vcc(struct class_device *dev, char *buf)
  86 {
  87         struct pcmcia_socket *s = to_socket(dev);
  88         if (!(s->state & SOCKET_PRESENT))
  89                 return -ENODEV;
  90         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  91 }
  92 static CLASS_DEVICE_ATTR(card_vcc, 0400, pccard_show_vcc, NULL);
  93
  94
  95 static ssize_t pccard_store_insert(struct class_device *dev, const char *buf, size_t count)
  96 {
  97         ssize_t ret;
  98         struct pcmcia_socket *s = to_socket(dev);
  99
 100         if (!count)
 101                 return -EINVAL;
 102
 103         ret = pcmcia_insert_card(s);
 104
 105         return ret ? ret : count;
 106 }
 107 static CLASS_DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 108
 109 static ssize_t pccard_store_eject(struct class_device *dev, const char *buf, size_t count)
 110 {
 111         ssize_t ret;
 112         struct pcmcia_socket *s = to_socket(dev);
 113
 114         if (!count)
 115                 return -EINVAL;
 116
 117         ret = pcmcia_eject_card(s);
 118
 119         return ret ? ret : count;
 120 }
 121 static CLASS_DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 122
 123
 124 static ssize_t pccard_show_irq_mask(struct class_device *dev, char *buf)
 125 {
 126         struct pcmcia_socket *s = to_socket(dev);
 127         return sprintf(buf, "0x%04x\n", s->irq_mask);
 128 }
 129
 130 static ssize_t pccard_store_irq_mask(struct class_device *dev, const char *buf, size_t count)
 131 {
 132         ssize_t ret;
 133         struct pcmcia_socket *s = to_socket(dev);
 134         u32 mask;
 135
 136         if (!count)
 137                 return -EINVAL;
 138
 139         ret = sscanf (buf, "0x%x\n", &mask);
 140
 141         if (ret == 1) {
 142                 s->irq_mask &= mask;
 143                 ret = 0;
 144         }
 145
 146         return ret ? ret : count;
 147 }
 148 static CLASS_DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 149
 150
 151 static ssize_t pccard_show_resource(struct class_device *dev, char *buf)
 152 {
 153         struct pcmcia_socket *s = to_socket(dev);
 154         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 155 }
 156
 157 static ssize_t pccard_store_resource(struct class_device *dev, const char *buf, size_t count)
 158 {
 159         unsigned long flags;
 160         struct pcmcia_socket *s = to_socket(dev);
 161
 162         if (!count)
 163                 return -EINVAL;
 164
 165         spin_lock_irqsave(&s->lock, flags);
 166         if (!s->resource_setup_done) {
 167                 s->resource_setup_done = 1;
 168                 spin_unlock_irqrestore(&s->lock, flags);
 169
 170                 down(&s->skt_sem);
 171                 if ((s->callback) &&
 172                     (s->state & SOCKET_PRESENT) &&
 173                     !(s->state & SOCKET_CARDBUS)) {
 174                         if (try_module_get(s->callback->owner)) {
 175                                 s->callback->resources_done(s);
 176                                 module_put(s->callback->owner);
 177                         }
 178                 }
 179                 up(&s->skt_sem);
 180
 181                 return count;
 182         }
 183         spin_unlock_irqrestore(&s->lock, flags);
 184
 185         return count;
 186 }
 187 static CLASS_DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 188
 189
 190 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
 191 {
 192         tuple_t tuple;
 193         int status, i;
 194         loff_t pointer = 0;
 195         ssize_t ret = 0;
 196         u_char *tuplebuffer;
 197         u_char *tempbuffer;
 198
 199         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
 200         if (!tuplebuffer)
 201                 return -ENOMEM;
 202
 203         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
 204         if (!tempbuffer) {
 205                 ret = -ENOMEM;
 206                 goto free_tuple;
 207         }
 208
 209         memset(&tuple, 0, sizeof(tuple_t));
 210
 211         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
 212         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
 213         tuple.TupleOffset = 0;
 214
 215         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
 216         while (!status) {
 217                 tuple.TupleData = tuplebuffer;
 218                 tuple.TupleDataMax = 255;
 219                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
 220
 221                 status = pccard_get_tuple_data(s, &tuple);
 222                 if (status)
 223                         break;
 224
 225                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
 226                         tempbuffer[0] = tuple.TupleCode & 0xff;
 227                         tempbuffer[1] = tuple.TupleLink & 0xff;
 228                         for (i = 0; i < tuple.TupleDataLen; i++)
 229                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
 230
 231                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
 232                                 if (((i + pointer) >= off) &&
 233                                     (i + pointer) < (off + count)) {
 234                                         buf[ret] = tempbuffer[i];
 235                                         ret++;
 236                                 }
 237                         }
 238                 }
 239
 240                 pointer += 2 + tuple.TupleDataLen;
 241
 242                 if (pointer >= (off + count))
 243                         break;
 244
 245                 if (tuple.TupleCode == CISTPL_END)
 246                         break;
 247                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
 248         }
 249
 250         kfree(tempbuffer);
 251  free_tuple:
 252         kfree(tuplebuffer);
 253
 254         return (ret);
 255 }
 256
 257 static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 258 {
 259         unsigned int size = 0x200;
 260
 261         if (off >= size)
 262                 count = 0;
 263         else {
 264                 struct pcmcia_socket *s;
 265                 cisinfo_t cisinfo;
 266
 267                 if (off + count > size)
 268                         count = size - off;
 269
 270                 s = to_socket(container_of(kobj, struct class_device, kobj));
 271
 272                 if (!(s->state & SOCKET_PRESENT))
 273                         return -ENODEV;
 274                 if (pccard_validate_cis(s, BIND_FN_ALL, &cisinfo))
 275                         return -EIO;
 276                 if (!cisinfo.Chains)
 277                         return -ENODATA;
 278
 279                 count = pccard_extract_cis(s, buf, off, count);
 280         }
 281
 282         return (count);
 283 }
 284
 285 static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 286 {
 287         struct pcmcia_socket *s = to_socket(container_of(kobj, struct class_device, kobj));
 288         cisdump_t *cis;
 289         ssize_t ret = count;
 290
 291         if (off)
 292                 return -EINVAL;
 293
 294         if (count >= 0x200)
 295                 return -EINVAL;
 296
 297         if (!(s->state & SOCKET_PRESENT))
 298                 return -ENODEV;
 299
 300         cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 301         if (!cis)
 302                 return -ENOMEM;
 303         memset(cis, 0, sizeof(cisdump_t));
 304
 305         cis->Length = count + 1;
 306         memcpy(cis->Data, buf, count);
 307
 308         if (pcmcia_replace_cis(s, cis))
 309                 ret  = -EIO;
 310
 311         kfree(cis);
 312
 313         if (!ret) {
 314                 down(&s->skt_sem);
 315                 if ((s->callback) && (s->state & SOCKET_PRESENT) &&
 316                     !(s->state & SOCKET_CARDBUS)) {
 317                         if (try_module_get(s->callback->owner)) {
 318                                 s->callback->replace_cis();
 319                                 module_put(s->callback->owner);
 320                         }
 321                 }
 322                 up(&s->skt_sem);
 323         }
 324
 325
 326         return (ret);
 327 }
 328
 329
 330 static struct class_device_attribute *pccard_socket_attributes[] = {
 331         &class_device_attr_card_type,
 332         &class_device_attr_card_voltage,
 333         &class_device_attr_card_vpp,
 334         &class_device_attr_card_vcc,
 335         &class_device_attr_card_insert,
 336         &class_device_attr_card_eject,
 337         &class_device_attr_card_irq_mask,
 338         &class_device_attr_available_resources_setup_done,
 339         NULL,
 340 };
 341
 342 static struct bin_attribute pccard_cis_attr = {
 343         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR, .owner = THIS_MODULE},
 344         .size = 0x200,
 345         .read = pccard_show_cis,
 346         .write = pccard_store_cis,
 347 };
 348
 349 static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev)
 350 {
 351         struct class_device_attribute **attr;
 352         int ret = 0;
 353
 354         for (attr = pccard_socket_attributes; *attr; attr++) {
 355                 ret = class_device_create_file(class_dev, *attr);
 356                 if (ret)
 357                         break;
 358         }
 359         if (!ret)
 360                 ret = sysfs_create_bin_file(&class_dev->kobj, &pccard_cis_attr);
 361
 362         return ret;
 363 }
 364
 365 static void __devexit pccard_sysfs_remove_socket(struct class_device *class_dev)
 366 {
 367         struct class_device_attribute **attr;
 368
 369         sysfs_remove_bin_file(&class_dev->kobj, &pccard_cis_attr);
 370         for (attr = pccard_socket_attributes; *attr; attr++)
 371                 class_device_remove_file(class_dev, *attr);
 372 }
 373
 374 struct class_interface pccard_sysfs_interface = {
 375         .class = &pcmcia_socket_class,
 376         .add = &pccard_sysfs_add_socket,
 377         .remove = __devexit_p(&pccard_sysfs_remove_socket),
 378 };