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/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         int val;
  46         struct pcmcia_socket *s = to_socket(dev);
  47
  48         if (!(s->state & SOCKET_PRESENT))
  49                 return -ENODEV;
  50         s->ops->get_status(s, &val);
  51         if (val & SS_CARDBUS)
  52                 return sprintf(buf, "32-bit\n");
  53         if (val & SS_DETECT)
  54                 return sprintf(buf, "16-bit\n");
  55         return sprintf(buf, "invalid\n");
  56 }
  57 static CLASS_DEVICE_ATTR(card_type, 0400, pccard_show_type, NULL);
  58
  59 static ssize_t pccard_show_voltage(struct class_device *dev, char *buf)
  60 {
  61         int val;
  62         struct pcmcia_socket *s = to_socket(dev);
  63
  64         if (!(s->state & SOCKET_PRESENT))
  65                 return -ENODEV;
  66         s->ops->get_status(s, &val);
  67         if (val & SS_3VCARD)
  68                 return sprintf(buf, "3.3V\n");
  69         if (val & SS_XVCARD)
  70                 return sprintf(buf, "X.XV\n");
  71         return sprintf(buf, "5.0V\n");
  72 }
  73 static CLASS_DEVICE_ATTR(card_voltage, 0400, pccard_show_voltage, NULL);
  74
  75 static ssize_t pccard_show_vpp(struct class_device *dev, char *buf)
  76 {
  77         struct pcmcia_socket *s = to_socket(dev);
  78         if (!(s->state & SOCKET_PRESENT))
  79                 return -ENODEV;
  80         return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  81 }
  82 static CLASS_DEVICE_ATTR(card_vpp, 0400, pccard_show_vpp, NULL);
  83
  84 static ssize_t pccard_show_vcc(struct class_device *dev, char *buf)
  85 {
  86         struct pcmcia_socket *s = to_socket(dev);
  87         if (!(s->state & SOCKET_PRESENT))
  88                 return -ENODEV;
  89         return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  90 }
  91 static CLASS_DEVICE_ATTR(card_vcc, 0400, pccard_show_vcc, NULL);
  92
  93
  94 static ssize_t pccard_store_insert(struct class_device *dev, const char *buf, size_t count)
  95 {
  96         ssize_t ret;
  97         struct pcmcia_socket *s = to_socket(dev);
  98
  99         if (!count)
 100                 return -EINVAL;
 101
 102         ret = pcmcia_insert_card(s);
 103
 104         return ret ? ret : count;
 105 }
 106 static CLASS_DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 107
 108 static ssize_t pccard_store_eject(struct class_device *dev, const char *buf, size_t count)
 109 {
 110         ssize_t ret;
 111         struct pcmcia_socket *s = to_socket(dev);
 112
 113         if (!count)
 114                 return -EINVAL;
 115
 116         ret = pcmcia_eject_card(s);
 117
 118         return ret ? ret : count;
 119 }
 120 static CLASS_DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
 121
 122
 123 static ssize_t pccard_show_irq_mask(struct class_device *dev, char *buf)
 124 {
 125         struct pcmcia_socket *s = to_socket(dev);
 126         return sprintf(buf, "0x%04x\n", s->irq_mask);
 127 }
 128
 129 static ssize_t pccard_store_irq_mask(struct class_device *dev, const char *buf, size_t count)
 130 {
 131         ssize_t ret;
 132         struct pcmcia_socket *s = to_socket(dev);
 133         u32 mask;
 134
 135         if (!count)
 136                 return -EINVAL;
 137
 138         ret = sscanf (buf, "0x%x\n", &mask);
 139
 140         if (ret == 1) {
 141                 s->irq_mask &= mask;
 142                 ret = 0;
 143         }
 144
 145         return ret ? ret : count;
 146 }
 147 static CLASS_DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
 148
 149
 150 static ssize_t pccard_show_resource(struct class_device *dev, char *buf)
 151 {
 152         struct pcmcia_socket *s = to_socket(dev);
 153         return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
 154 }
 155
 156 static ssize_t pccard_store_resource(struct class_device *dev, const char *buf, size_t count)
 157 {
 158         unsigned long flags;
 159         struct pcmcia_socket *s = to_socket(dev);
 160
 161         if (!count)
 162                 return -EINVAL;
 163
 164         spin_lock_irqsave(&s->lock, flags);
 165         if (!s->resource_setup_done)
 166                 s->resource_setup_done = 1;
 167         spin_unlock_irqrestore(&s->lock, flags);
 168
 169         down(&s->skt_sem);
 170         if ((s->callback) &&
 171             (s->state & SOCKET_PRESENT) &&
 172             !(s->state & SOCKET_CARDBUS)) {
 173                 if (try_module_get(s->callback->owner)) {
 174                         s->callback->requery(s);
 175                         module_put(s->callback->owner);
 176                 }
 177         }
 178         up(&s->skt_sem);
 179
 180         return count;
 181 }
 182 static CLASS_DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
 183
 184
 185 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf, loff_t off, size_t count)
 186 {
 187         tuple_t tuple;
 188         int status, i;
 189         loff_t pointer = 0;
 190         ssize_t ret = 0;
 191         u_char *tuplebuffer;
 192         u_char *tempbuffer;
 193
 194         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
 195         if (!tuplebuffer)
 196                 return -ENOMEM;
 197
 198         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
 199         if (!tempbuffer) {
 200                 ret = -ENOMEM;
 201                 goto free_tuple;
 202         }
 203
 204         memset(&tuple, 0, sizeof(tuple_t));
 205
 206         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
 207         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
 208         tuple.TupleOffset = 0;
 209
 210         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
 211         while (!status) {
 212                 tuple.TupleData = tuplebuffer;
 213                 tuple.TupleDataMax = 255;
 214                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
 215
 216                 status = pccard_get_tuple_data(s, &tuple);
 217                 if (status)
 218                         break;
 219
 220                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
 221                         tempbuffer[0] = tuple.TupleCode & 0xff;
 222                         tempbuffer[1] = tuple.TupleLink & 0xff;
 223                         for (i = 0; i < tuple.TupleDataLen; i++)
 224                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
 225
 226                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
 227                                 if (((i + pointer) >= off) &&
 228                                     (i + pointer) < (off + count)) {
 229                                         buf[ret] = tempbuffer[i];
 230                                         ret++;
 231                                 }
 232                         }
 233                 }
 234
 235                 pointer += 2 + tuple.TupleDataLen;
 236
 237                 if (pointer >= (off + count))
 238                         break;
 239
 240                 if (tuple.TupleCode == CISTPL_END)
 241                         break;
 242                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
 243         }
 244
 245         kfree(tempbuffer);
 246  free_tuple:
 247         kfree(tuplebuffer);
 248
 249         return (ret);
 250 }
 251
 252 static ssize_t pccard_show_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 253 {
 254         unsigned int size = 0x200;
 255
 256         if (off >= size)
 257                 count = 0;
 258         else {
 259                 struct pcmcia_socket *s;
 260                 cisinfo_t cisinfo;
 261
 262                 if (off + count > size)
 263                         count = size - off;
 264
 265                 s = to_socket(container_of(kobj, struct class_device, kobj));
 266
 267                 if (!(s->state & SOCKET_PRESENT))
 268                         return -ENODEV;
 269                 if (pccard_validate_cis(s, BIND_FN_ALL, &cisinfo))
 270                         return -EIO;
 271                 if (!cisinfo.Chains)
 272                         return -ENODATA;
 273
 274                 count = pccard_extract_cis(s, buf, off, count);
 275         }
 276
 277         return (count);
 278 }
 279
 280 static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, size_t count)
 281 {
 282         struct pcmcia_socket *s = to_socket(container_of(kobj, struct class_device, kobj));
 283         cisdump_t *cis;
 284         ssize_t ret = count;
 285
 286         if (off)
 287                 return -EINVAL;
 288
 289         if (count >= 0x200)
 290                 return -EINVAL;
 291
 292         if (!(s->state & SOCKET_PRESENT))
 293                 return -ENODEV;
 294
 295         cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 296         if (!cis)
 297                 return -ENOMEM;
 298         memset(cis, 0, sizeof(cisdump_t));
 299
 300         cis->Length = count + 1;
 301         memcpy(cis->Data, buf, count);
 302
 303         if (pcmcia_replace_cis(s, cis))
 304                 ret  = -EIO;
 305
 306         kfree(cis);
 307
 308         if (!ret) {
 309                 down(&s->skt_sem);
 310                 if ((s->callback) && (s->state & SOCKET_PRESENT) &&
 311                     !(s->state & SOCKET_CARDBUS)) {
 312                         if (try_module_get(s->callback->owner)) {
 313                                 s->callback->requery(s);
 314                                 module_put(s->callback->owner);
 315                         }
 316                 }
 317                 up(&s->skt_sem);
 318         }
 319
 320
 321         return (ret);
 322 }
 323
 324
 325 static struct class_device_attribute *pccard_socket_attributes[] = {
 326         &class_device_attr_card_type,
 327         &class_device_attr_card_voltage,
 328         &class_device_attr_card_vpp,
 329         &class_device_attr_card_vcc,
 330         &class_device_attr_card_insert,
 331         &class_device_attr_card_eject,
 332         &class_device_attr_card_irq_mask,
 333         &class_device_attr_available_resources_setup_done,
 334         NULL,
 335 };
 336
 337 static struct bin_attribute pccard_cis_attr = {
 338         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR, .owner = THIS_MODULE},
 339         .size = 0x200,
 340         .read = pccard_show_cis,
 341         .write = pccard_store_cis,
 342 };
 343
 344 static int __devinit pccard_sysfs_add_socket(struct class_device *class_dev)
 345 {
 346         struct class_device_attribute **attr;
 347         int ret = 0;
 348
 349         for (attr = pccard_socket_attributes; *attr; attr++) {
 350                 ret = class_device_create_file(class_dev, *attr);
 351                 if (ret)
 352                         break;
 353         }
 354         if (!ret)
 355                 ret = sysfs_create_bin_file(&class_dev->kobj, &pccard_cis_attr);
 356
 357         return ret;
 358 }
 359
 360 static void __devexit pccard_sysfs_remove_socket(struct class_device *class_dev)
 361 {
 362         struct class_device_attribute **attr;
 363
 364         sysfs_remove_bin_file(&class_dev->kobj, &pccard_cis_attr);
 365         for (attr = pccard_socket_attributes; *attr; attr++)
 366                 class_device_remove_file(class_dev, *attr);
 367 }
 368
 369 struct class_interface pccard_sysfs_interface = {
 370         .class = &pcmcia_socket_class,
 371         .add = &pccard_sysfs_add_socket,
 372         .remove = __devexit_p(&pccard_sysfs_remove_socket),
 373 };