drivers/hwmon/i5k_amb.c

   1 /*
   2  * A hwmon driver for the Intel 5000 series chipset FB-DIMM AMB
   3  * temperature sensors
   4  * Copyright (C) 2007 IBM
   5  *
   6  * Author: Darrick J. Wong <djwong@us.ibm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/jiffies.h>
  25 #include <linux/hwmon.h>
  26 #include <linux/hwmon-sysfs.h>
  27 #include <linux/err.h>
  28 #include <linux/mutex.h>
  29 #include <linux/delay.h>
  30 #include <linux/log2.h>
  31 #include <linux/pci.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/slab.h>
  34
  35 #define DRVNAME "i5k_amb"
  36
  37 #define I5K_REG_AMB_BASE_ADDR           0x48
  38 #define I5K_REG_AMB_LEN_ADDR            0x50
  39 #define I5K_REG_CHAN0_PRESENCE_ADDR     0x64
  40 #define I5K_REG_CHAN1_PRESENCE_ADDR     0x66
  41
  42 #define AMB_REG_TEMP_MIN_ADDR           0x80
  43 #define AMB_REG_TEMP_MID_ADDR           0x81
  44 #define AMB_REG_TEMP_MAX_ADDR           0x82
  45 #define AMB_REG_TEMP_STATUS_ADDR        0x84
  46 #define AMB_REG_TEMP_ADDR               0x85
  47
  48 #define AMB_CONFIG_SIZE                 2048
  49 #define AMB_FUNC_3_OFFSET               768
  50
  51 static unsigned long amb_reg_temp_status(unsigned int amb)
  52 {
  53         return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_STATUS_ADDR +
  54                AMB_CONFIG_SIZE * amb;
  55 }
  56
  57 static unsigned long amb_reg_temp_min(unsigned int amb)
  58 {
  59         return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MIN_ADDR +
  60                AMB_CONFIG_SIZE * amb;
  61 }
  62
  63 static unsigned long amb_reg_temp_mid(unsigned int amb)
  64 {
  65         return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MID_ADDR +
  66                AMB_CONFIG_SIZE * amb;
  67 }
  68
  69 static unsigned long amb_reg_temp_max(unsigned int amb)
  70 {
  71         return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MAX_ADDR +
  72                AMB_CONFIG_SIZE * amb;
  73 }
  74
  75 static unsigned long amb_reg_temp(unsigned int amb)
  76 {
  77         return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_ADDR +
  78                AMB_CONFIG_SIZE * amb;
  79 }
  80
  81 #define MAX_MEM_CHANNELS                4
  82 #define MAX_AMBS_PER_CHANNEL            16
  83 #define MAX_AMBS                        (MAX_MEM_CHANNELS * \
  84                                          MAX_AMBS_PER_CHANNEL)
  85 #define CHANNEL_SHIFT                   4
  86 #define DIMM_MASK                       0xF
  87 /*
  88  * Ugly hack: For some reason the highest bit is set if there
  89  * are _any_ DIMMs in the channel.  Attempting to read from
  90  * this "high-order" AMB results in a memory bus error, so
  91  * for now we'll just ignore that top bit, even though that
  92  * might prevent us from seeing the 16th DIMM in the channel.
  93  */
  94 #define REAL_MAX_AMBS_PER_CHANNEL       15
  95 #define KNOBS_PER_AMB                   6
  96
  97 static unsigned long amb_num_from_reg(unsigned int byte_num, unsigned int bit)
  98 {
  99         return byte_num * MAX_AMBS_PER_CHANNEL + bit;
 100 }
 101
 102 #define AMB_SYSFS_NAME_LEN              16
 103 struct i5k_device_attribute {
 104         struct sensor_device_attribute s_attr;
 105         char name[AMB_SYSFS_NAME_LEN];
 106 };
 107
 108 struct i5k_amb_data {
 109         struct device *hwmon_dev;
 110
 111         unsigned long amb_base;
 112         unsigned long amb_len;
 113         u16 amb_present[MAX_MEM_CHANNELS];
 114         void __iomem *amb_mmio;
 115         struct i5k_device_attribute *attrs;
 116         unsigned int num_attrs;
 117 };
 118
 119 static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
 120                          char *buf)
 121 {
 122         return sprintf(buf, "%s\n", DRVNAME);
 123 }
 124
 125
 126 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 127
 128 static struct platform_device *amb_pdev;
 129
 130 static u8 amb_read_byte(struct i5k_amb_data *data, unsigned long offset)
 131 {
 132         return ioread8(data->amb_mmio + offset);
 133 }
 134
 135 static void amb_write_byte(struct i5k_amb_data *data, unsigned long offset,
 136                            u8 val)
 137 {
 138         iowrite8(val, data->amb_mmio + offset);
 139 }
 140
 141 static ssize_t show_amb_alarm(struct device *dev,
 142                              struct device_attribute *devattr,
 143                              char *buf)
 144 {
 145         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 146         struct i5k_amb_data *data = dev_get_drvdata(dev);
 147
 148         if (!(amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x20) &&
 149              (amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x8))
 150                 return sprintf(buf, "1\n");
 151         else
 152                 return sprintf(buf, "0\n");
 153 }
 154
 155 static ssize_t store_amb_min(struct device *dev,
 156                              struct device_attribute *devattr,
 157                              const char *buf,
 158                              size_t count)
 159 {
 160         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 161         struct i5k_amb_data *data = dev_get_drvdata(dev);
 162         unsigned long temp = simple_strtoul(buf, NULL, 10) / 500;
 163
 164         if (temp > 255)
 165                 temp = 255;
 166
 167         amb_write_byte(data, amb_reg_temp_min(attr->index), temp);
 168         return count;
 169 }
 170
 171 static ssize_t store_amb_mid(struct device *dev,
 172                              struct device_attribute *devattr,
 173                              const char *buf,
 174                              size_t count)
 175 {
 176         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 177         struct i5k_amb_data *data = dev_get_drvdata(dev);
 178         unsigned long temp = simple_strtoul(buf, NULL, 10) / 500;
 179
 180         if (temp > 255)
 181                 temp = 255;
 182
 183         amb_write_byte(data, amb_reg_temp_mid(attr->index), temp);
 184         return count;
 185 }
 186
 187 static ssize_t store_amb_max(struct device *dev,
 188                              struct device_attribute *devattr,
 189                              const char *buf,
 190                              size_t count)
 191 {
 192         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 193         struct i5k_amb_data *data = dev_get_drvdata(dev);
 194         unsigned long temp = simple_strtoul(buf, NULL, 10) / 500;
 195
 196         if (temp > 255)
 197                 temp = 255;
 198
 199         amb_write_byte(data, amb_reg_temp_max(attr->index), temp);
 200         return count;
 201 }
 202
 203 static ssize_t show_amb_min(struct device *dev,
 204                              struct device_attribute *devattr,
 205                              char *buf)
 206 {
 207         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 208         struct i5k_amb_data *data = dev_get_drvdata(dev);
 209         return sprintf(buf, "%d\n",
 210                 500 * amb_read_byte(data, amb_reg_temp_min(attr->index)));
 211 }
 212
 213 static ssize_t show_amb_mid(struct device *dev,
 214                              struct device_attribute *devattr,
 215                              char *buf)
 216 {
 217         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 218         struct i5k_amb_data *data = dev_get_drvdata(dev);
 219         return sprintf(buf, "%d\n",
 220                 500 * amb_read_byte(data, amb_reg_temp_mid(attr->index)));
 221 }
 222
 223 static ssize_t show_amb_max(struct device *dev,
 224                              struct device_attribute *devattr,
 225                              char *buf)
 226 {
 227         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 228         struct i5k_amb_data *data = dev_get_drvdata(dev);
 229         return sprintf(buf, "%d\n",
 230                 500 * amb_read_byte(data, amb_reg_temp_max(attr->index)));
 231 }
 232
 233 static ssize_t show_amb_temp(struct device *dev,
 234                              struct device_attribute *devattr,
 235                              char *buf)
 236 {
 237         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 238         struct i5k_amb_data *data = dev_get_drvdata(dev);
 239         return sprintf(buf, "%d\n",
 240                 500 * amb_read_byte(data, amb_reg_temp(attr->index)));
 241 }
 242
 243 static ssize_t show_label(struct device *dev,
 244                           struct device_attribute *devattr,
 245                           char *buf)
 246 {
 247         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 248
 249         return sprintf(buf, "Ch. %d DIMM %d\n", attr->index >> CHANNEL_SHIFT,
 250                        attr->index & DIMM_MASK);
 251 }
 252
 253 static int __devinit i5k_amb_hwmon_init(struct platform_device *pdev)
 254 {
 255         int i, j, k, d = 0;
 256         u16 c;
 257         int res = 0;
 258         int num_ambs = 0;
 259         struct i5k_amb_data *data = platform_get_drvdata(pdev);
 260
 261         /* Count the number of AMBs found */
 262         /* ignore the high-order bit, see "Ugly hack" comment above */
 263         for (i = 0; i < MAX_MEM_CHANNELS; i++)
 264                 num_ambs += hweight16(data->amb_present[i] & 0x7fff);
 265
 266         /* Set up sysfs stuff */
 267         data->attrs = kzalloc(sizeof(*data->attrs) * num_ambs * KNOBS_PER_AMB,
 268                                 GFP_KERNEL);
 269         if (!data->attrs)
 270                 return -ENOMEM;
 271         data->num_attrs = 0;
 272
 273         for (i = 0; i < MAX_MEM_CHANNELS; i++) {
 274                 c = data->amb_present[i];
 275                 for (j = 0; j < REAL_MAX_AMBS_PER_CHANNEL; j++, c >>= 1) {
 276                         struct i5k_device_attribute *iattr;
 277
 278                         k = amb_num_from_reg(i, j);
 279                         if (!(c & 0x1))
 280                                 continue;
 281                         d++;
 282
 283                         /* sysfs label */
 284                         iattr = data->attrs + data->num_attrs;
 285                         snprintf(iattr->name, AMB_SYSFS_NAME_LEN,
 286                                  "temp%d_label", d);
 287                         iattr->s_attr.dev_attr.attr.name = iattr->name;
 288                         iattr->s_attr.dev_attr.attr.mode = S_IRUGO;
 289                         iattr->s_attr.dev_attr.show = show_label;
 290                         iattr->s_attr.index = k;
 291                         sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
 292                         res = device_create_file(&pdev->dev,
 293                                                  &iattr->s_attr.dev_attr);
 294                         if (res)
 295                                 goto exit_remove;
 296                         data->num_attrs++;
 297
 298                         /* Temperature sysfs knob */
 299                         iattr = data->attrs + data->num_attrs;
 300                         snprintf(iattr->name, AMB_SYSFS_NAME_LEN,
 301                                  "temp%d_input", d);
 302                         iattr->s_attr.dev_attr.attr.name = iattr->name;
 303                         iattr->s_attr.dev_attr.attr.mode = S_IRUGO;
 304                         iattr->s_attr.dev_attr.show = show_amb_temp;
 305                         iattr->s_attr.index = k;
 306                         sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
 307                         res = device_create_file(&pdev->dev,
 308                                                  &iattr->s_attr.dev_attr);
 309                         if (res)
 310                                 goto exit_remove;
 311                         data->num_attrs++;
 312
 313                         /* Temperature min sysfs knob */
 314                         iattr = data->attrs + data->num_attrs;
 315                         snprintf(iattr->name, AMB_SYSFS_NAME_LEN,
 316                                  "temp%d_min", d);
 317                         iattr->s_attr.dev_attr.attr.name = iattr->name;
 318                         iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
 319                         iattr->s_attr.dev_attr.show = show_amb_min;
 320                         iattr->s_attr.dev_attr.store = store_amb_min;
 321                         iattr->s_attr.index = k;
 322                         sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
 323                         res = device_create_file(&pdev->dev,
 324                                                  &iattr->s_attr.dev_attr);
 325                         if (res)
 326                                 goto exit_remove;
 327                         data->num_attrs++;
 328
 329                         /* Temperature mid sysfs knob */
 330                         iattr = data->attrs + data->num_attrs;
 331                         snprintf(iattr->name, AMB_SYSFS_NAME_LEN,
 332                                  "temp%d_mid", d);
 333                         iattr->s_attr.dev_attr.attr.name = iattr->name;
 334                         iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
 335                         iattr->s_attr.dev_attr.show = show_amb_mid;
 336                         iattr->s_attr.dev_attr.store = store_amb_mid;
 337                         iattr->s_attr.index = k;
 338                         sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
 339                         res = device_create_file(&pdev->dev,
 340                                                  &iattr->s_attr.dev_attr);
 341                         if (res)
 342                                 goto exit_remove;
 343                         data->num_attrs++;
 344
 345                         /* Temperature max sysfs knob */
 346                         iattr = data->attrs + data->num_attrs;
 347                         snprintf(iattr->name, AMB_SYSFS_NAME_LEN,
 348                                  "temp%d_max", d);
 349                         iattr->s_attr.dev_attr.attr.name = iattr->name;
 350                         iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO;
 351                         iattr->s_attr.dev_attr.show = show_amb_max;
 352                         iattr->s_attr.dev_attr.store = store_amb_max;
 353                         iattr->s_attr.index = k;
 354                         sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
 355                         res = device_create_file(&pdev->dev,
 356                                                  &iattr->s_attr.dev_attr);
 357                         if (res)
 358                                 goto exit_remove;
 359                         data->num_attrs++;
 360
 361                         /* Temperature alarm sysfs knob */
 362                         iattr = data->attrs + data->num_attrs;
 363                         snprintf(iattr->name, AMB_SYSFS_NAME_LEN,
 364                                  "temp%d_alarm", d);
 365                         iattr->s_attr.dev_attr.attr.name = iattr->name;
 366                         iattr->s_attr.dev_attr.attr.mode = S_IRUGO;
 367                         iattr->s_attr.dev_attr.show = show_amb_alarm;
 368                         iattr->s_attr.index = k;
 369                         sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
 370                         res = device_create_file(&pdev->dev,
 371                                                  &iattr->s_attr.dev_attr);
 372                         if (res)
 373                                 goto exit_remove;
 374                         data->num_attrs++;
 375                 }
 376         }
 377
 378         res = device_create_file(&pdev->dev, &dev_attr_name);
 379         if (res)
 380                 goto exit_remove;
 381
 382         data->hwmon_dev = hwmon_device_register(&pdev->dev);
 383         if (IS_ERR(data->hwmon_dev)) {
 384                 res = PTR_ERR(data->hwmon_dev);
 385                 goto exit_remove;
 386         }
 387
 388         return res;
 389
 390 exit_remove:
 391         device_remove_file(&pdev->dev, &dev_attr_name);
 392         for (i = 0; i < data->num_attrs; i++)
 393                 device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr);
 394         kfree(data->attrs);
 395
 396         return res;
 397 }
 398
 399 static int __devinit i5k_amb_add(void)
 400 {
 401         int res = -ENODEV;
 402
 403         /* only ever going to be one of these */
 404         amb_pdev = platform_device_alloc(DRVNAME, 0);
 405         if (!amb_pdev)
 406                 return -ENOMEM;
 407
 408         res = platform_device_add(amb_pdev);
 409         if (res)
 410                 goto err;
 411         return 0;
 412
 413 err:
 414         platform_device_put(amb_pdev);
 415         return res;
 416 }
 417
 418 static int __devinit i5k_find_amb_registers(struct i5k_amb_data *data,
 419                                             unsigned long devid)
 420 {
 421         struct pci_dev *pcidev;
 422         u32 val32;
 423         int res = -ENODEV;
 424
 425         /* Find AMB register memory space */
 426         pcidev = pci_get_device(PCI_VENDOR_ID_INTEL,
 427                                 devid,
 428                                 NULL);
 429         if (!pcidev)
 430                 return -ENODEV;
 431
 432         if (pci_read_config_dword(pcidev, I5K_REG_AMB_BASE_ADDR, &val32))
 433                 goto out;
 434         data->amb_base = val32;
 435
 436         if (pci_read_config_dword(pcidev, I5K_REG_AMB_LEN_ADDR, &val32))
 437                 goto out;
 438         data->amb_len = val32;
 439
 440         /* Is it big enough? */
 441         if (data->amb_len < AMB_CONFIG_SIZE * MAX_AMBS) {
 442                 dev_err(&pcidev->dev, "AMB region too small!\n");
 443                 goto out;
 444         }
 445
 446         res = 0;
 447 out:
 448         pci_dev_put(pcidev);
 449         return res;
 450 }
 451
 452 static int __devinit i5k_channel_probe(u16 *amb_present, unsigned long dev_id)
 453 {
 454         struct pci_dev *pcidev;
 455         u16 val16;
 456         int res = -ENODEV;
 457
 458         /* Copy the DIMM presence map for these two channels */
 459         pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL);
 460         if (!pcidev)
 461                 return -ENODEV;
 462
 463         if (pci_read_config_word(pcidev, I5K_REG_CHAN0_PRESENCE_ADDR, &val16))
 464                 goto out;
 465         amb_present[0] = val16;
 466
 467         if (pci_read_config_word(pcidev, I5K_REG_CHAN1_PRESENCE_ADDR, &val16))
 468                 goto out;
 469         amb_present[1] = val16;
 470
 471         res = 0;
 472
 473 out:
 474         pci_dev_put(pcidev);
 475         return res;
 476 }
 477
 478 static struct {
 479         unsigned long err;
 480         unsigned long fbd0;
 481 } chipset_ids[] __devinitdata  = {
 482         { PCI_DEVICE_ID_INTEL_5000_ERR, PCI_DEVICE_ID_INTEL_5000_FBD0 },
 483         { PCI_DEVICE_ID_INTEL_5400_ERR, PCI_DEVICE_ID_INTEL_5400_FBD0 },
 484         { 0, 0 }
 485 };
 486
 487 #ifdef MODULE
 488 static struct pci_device_id i5k_amb_ids[] __devinitdata = {
 489         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) },
 490         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR) },
 491         { 0, }
 492 };
 493 MODULE_DEVICE_TABLE(pci, i5k_amb_ids);
 494 #endif
 495
 496 static int __devinit i5k_amb_probe(struct platform_device *pdev)
 497 {
 498         struct i5k_amb_data *data;
 499         struct resource *reso;
 500         int i, res;
 501
 502         data = kzalloc(sizeof(*data), GFP_KERNEL);
 503         if (!data)
 504                 return -ENOMEM;
 505
 506         /* Figure out where the AMB registers live */
 507         i = 0;
 508         do {
 509                 res = i5k_find_amb_registers(data, chipset_ids[i].err);
 510                 if (res == 0)
 511                         break;
 512                 i++;
 513         } while (chipset_ids[i].err);
 514
 515         if (res)
 516                 goto err;
 517
 518         /* Copy the DIMM presence map for the first two channels */
 519         res = i5k_channel_probe(&data->amb_present[0], chipset_ids[i].fbd0);
 520         if (res)
 521                 goto err;
 522
 523         /* Copy the DIMM presence map for the optional second two channels */
 524         i5k_channel_probe(&data->amb_present[2], chipset_ids[i].fbd0 + 1);
 525
 526         /* Set up resource regions */
 527         reso = request_mem_region(data->amb_base, data->amb_len, DRVNAME);
 528         if (!reso) {
 529                 res = -EBUSY;
 530                 goto err;
 531         }
 532
 533         data->amb_mmio = ioremap_nocache(data->amb_base, data->amb_len);
 534         if (!data->amb_mmio) {
 535                 res = -EBUSY;
 536                 goto err_map_failed;
 537         }
 538
 539         platform_set_drvdata(pdev, data);
 540
 541         res = i5k_amb_hwmon_init(pdev);
 542         if (res)
 543                 goto err_init_failed;
 544
 545         return res;
 546
 547 err_init_failed:
 548         iounmap(data->amb_mmio);
 549         platform_set_drvdata(pdev, NULL);
 550 err_map_failed:
 551         release_mem_region(data->amb_base, data->amb_len);
 552 err:
 553         kfree(data);
 554         return res;
 555 }
 556
 557 static int __devexit i5k_amb_remove(struct platform_device *pdev)
 558 {
 559         int i;
 560         struct i5k_amb_data *data = platform_get_drvdata(pdev);
 561
 562         hwmon_device_unregister(data->hwmon_dev);
 563         device_remove_file(&pdev->dev, &dev_attr_name);
 564         for (i = 0; i < data->num_attrs; i++)
 565                 device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr);
 566         kfree(data->attrs);
 567         iounmap(data->amb_mmio);
 568         release_mem_region(data->amb_base, data->amb_len);
 569         platform_set_drvdata(pdev, NULL);
 570         kfree(data);
 571         return 0;
 572 }
 573
 574 static struct platform_driver i5k_amb_driver = {
 575         .driver = {
 576                 .owner = THIS_MODULE,
 577                 .name = DRVNAME,
 578         },
 579         .probe = i5k_amb_probe,
 580         .remove = __devexit_p(i5k_amb_remove),
 581 };
 582
 583 static int __init i5k_amb_init(void)
 584 {
 585         int res;
 586
 587         res = platform_driver_register(&i5k_amb_driver);
 588         if (res)
 589                 return res;
 590
 591         res = i5k_amb_add();
 592         if (res)
 593                 platform_driver_unregister(&i5k_amb_driver);
 594
 595         return res;
 596 }
 597
 598 static void __exit i5k_amb_exit(void)
 599 {
 600         platform_device_unregister(amb_pdev);
 601         platform_driver_unregister(&i5k_amb_driver);
 602 }
 603
 604 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
 605 MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor");
 606 MODULE_LICENSE("GPL");
 607
 608 module_init(i5k_amb_init);
 609 module_exit(i5k_amb_exit);