drivers/hwmon/sis5595.c

   1 /*
   2  * sis5595.c - Part of lm_sensors, Linux kernel modules
   3  *             for hardware monitoring
   4  *
   5  * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
   6  *                           Kyösti Mälkki <kmalkki@cc.hut.fi>, and
   7  *                           Mark D. Studebaker <mdsxyz123@yahoo.com>
   8  * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
   9  * the help of Jean Delvare <khali@linux-fr.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 /*
  27  * SiS southbridge has a LM78-like chip integrated on the same IC.
  28  * This driver is a customized copy of lm78.c
  29  *
  30  * Supports following revisions:
  31  *      Version         PCI ID          PCI Revision
  32  *      1               1039/0008       AF or less
  33  *      2               1039/0008       B0 or greater
  34  *
  35  *  Note: these chips contain a 0008 device which is incompatible with the
  36  *       5595. We recognize these by the presence of the listed
  37  *       "blacklist" PCI ID and refuse to load.
  38  *
  39  * NOT SUPPORTED        PCI ID          BLACKLIST PCI ID
  40  *       540            0008            0540
  41  *       550            0008            0550
  42  *      5513            0008            5511
  43  *      5581            0008            5597
  44  *      5582            0008            5597
  45  *      5597            0008            5597
  46  *      5598            0008            5597/5598
  47  *       630            0008            0630
  48  *       645            0008            0645
  49  *       730            0008            0730
  50  *       735            0008            0735
  51  */
  52
  53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  54
  55 #include <linux/module.h>
  56 #include <linux/slab.h>
  57 #include <linux/ioport.h>
  58 #include <linux/pci.h>
  59 #include <linux/platform_device.h>
  60 #include <linux/hwmon.h>
  61 #include <linux/hwmon-sysfs.h>
  62 #include <linux/err.h>
  63 #include <linux/init.h>
  64 #include <linux/jiffies.h>
  65 #include <linux/mutex.h>
  66 #include <linux/sysfs.h>
  67 #include <linux/acpi.h>
  68 #include <linux/io.h>
  69
  70
  71 /*
  72  * If force_addr is set to anything different from 0, we forcibly enable
  73  * the device at the given address.
  74  */
  75 static u16 force_addr;
  76 module_param(force_addr, ushort, 0);
  77 MODULE_PARM_DESC(force_addr,
  78                  "Initialize the base address of the sensors");
  79
  80 static struct platform_device *pdev;
  81
  82 /* Many SIS5595 constants specified below */
  83
  84 /* Length of ISA address segment */
  85 #define SIS5595_EXTENT 8
  86 /* PCI Config Registers */
  87 #define SIS5595_BASE_REG 0x68
  88 #define SIS5595_PIN_REG 0x7A
  89 #define SIS5595_ENABLE_REG 0x7B
  90
  91 /* Where are the ISA address/data registers relative to the base address */
  92 #define SIS5595_ADDR_REG_OFFSET 5
  93 #define SIS5595_DATA_REG_OFFSET 6
  94
  95 /* The SIS5595 registers */
  96 #define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
  97 #define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
  98 #define SIS5595_REG_IN(nr) (0x20 + (nr))
  99
 100 #define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
 101 #define SIS5595_REG_FAN(nr) (0x28 + (nr))
 102
 103 /*
 104  * On the first version of the chip, the temp registers are separate.
 105  * On the second version,
 106  * TEMP pin is shared with IN4, configured in PCI register 0x7A.
 107  * The registers are the same as well.
 108  * OVER and HYST are really MAX and MIN.
 109  */
 110
 111 #define REV2MIN 0xb0
 112 #define SIS5595_REG_TEMP        (((data->revision) >= REV2MIN) ? \
 113                                         SIS5595_REG_IN(4) : 0x27)
 114 #define SIS5595_REG_TEMP_OVER   (((data->revision) >= REV2MIN) ? \
 115                                         SIS5595_REG_IN_MAX(4) : 0x39)
 116 #define SIS5595_REG_TEMP_HYST   (((data->revision) >= REV2MIN) ? \
 117                                         SIS5595_REG_IN_MIN(4) : 0x3a)
 118
 119 #define SIS5595_REG_CONFIG 0x40
 120 #define SIS5595_REG_ALARM1 0x41
 121 #define SIS5595_REG_ALARM2 0x42
 122 #define SIS5595_REG_FANDIV 0x47
 123
 124 /*
 125  * Conversions. Limit checking is only done on the TO_REG
 126  * variants.
 127  */
 128
 129 /*
 130  * IN: mV, (0V to 4.08V)
 131  * REG: 16mV/bit
 132  */
 133 static inline u8 IN_TO_REG(unsigned long val)
 134 {
 135         unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
 136         return (nval + 8) / 16;
 137 }
 138 #define IN_FROM_REG(val) ((val) *  16)
 139
 140 static inline u8 FAN_TO_REG(long rpm, int div)
 141 {
 142         if (rpm <= 0)
 143                 return 255;
 144         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 145 }
 146
 147 static inline int FAN_FROM_REG(u8 val, int div)
 148 {
 149         return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
 150 }
 151
 152 /*
 153  * TEMP: mC (-54.12C to +157.53C)
 154  * REG: 0.83C/bit + 52.12, two's complement
 155  */
 156 static inline int TEMP_FROM_REG(s8 val)
 157 {
 158         return val * 830 + 52120;
 159 }
 160 static inline s8 TEMP_TO_REG(int val)
 161 {
 162         int nval = SENSORS_LIMIT(val, -54120, 157530) ;
 163         return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
 164 }
 165
 166 /*
 167  * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
 168  * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
 169  */
 170 static inline u8 DIV_TO_REG(int val)
 171 {
 172         return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
 173 }
 174 #define DIV_FROM_REG(val) (1 << (val))
 175
 176 /*
 177  * For each registered chip, we need to keep some data in memory.
 178  * The structure is dynamically allocated.
 179  */
 180 struct sis5595_data {
 181         unsigned short addr;
 182         const char *name;
 183         struct device *hwmon_dev;
 184         struct mutex lock;
 185
 186         struct mutex update_lock;
 187         char valid;             /* !=0 if following fields are valid */
 188         unsigned long last_updated;     /* In jiffies */
 189         char maxins;            /* == 3 if temp enabled, otherwise == 4 */
 190         u8 revision;            /* Reg. value */
 191
 192         u8 in[5];               /* Register value */
 193         u8 in_max[5];           /* Register value */
 194         u8 in_min[5];           /* Register value */
 195         u8 fan[2];              /* Register value */
 196         u8 fan_min[2];          /* Register value */
 197         s8 temp;                /* Register value */
 198         s8 temp_over;           /* Register value */
 199         s8 temp_hyst;           /* Register value */
 200         u8 fan_div[2];          /* Register encoding, shifted right */
 201         u16 alarms;             /* Register encoding, combined */
 202 };
 203
 204 static struct pci_dev *s_bridge;        /* pointer to the (only) sis5595 */
 205
 206 static int sis5595_probe(struct platform_device *pdev);
 207 static int __devexit sis5595_remove(struct platform_device *pdev);
 208
 209 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
 210 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
 211 static struct sis5595_data *sis5595_update_device(struct device *dev);
 212 static void sis5595_init_device(struct sis5595_data *data);
 213
 214 static struct platform_driver sis5595_driver = {
 215         .driver = {
 216                 .owner  = THIS_MODULE,
 217                 .name   = "sis5595",
 218         },
 219         .probe          = sis5595_probe,
 220         .remove         = __devexit_p(sis5595_remove),
 221 };
 222
 223 /* 4 Voltages */
 224 static ssize_t show_in(struct device *dev, struct device_attribute *da,
 225                        char *buf)
 226 {
 227         struct sis5595_data *data = sis5595_update_device(dev);
 228         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 229         int nr = attr->index;
 230         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
 231 }
 232
 233 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
 234                            char *buf)
 235 {
 236         struct sis5595_data *data = sis5595_update_device(dev);
 237         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 238         int nr = attr->index;
 239         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
 240 }
 241
 242 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
 243                            char *buf)
 244 {
 245         struct sis5595_data *data = sis5595_update_device(dev);
 246         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 247         int nr = attr->index;
 248         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
 249 }
 250
 251 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
 252                           const char *buf, size_t count)
 253 {
 254         struct sis5595_data *data = dev_get_drvdata(dev);
 255         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 256         int nr = attr->index;
 257         unsigned long val;
 258         int err;
 259
 260         err = kstrtoul(buf, 10, &val);
 261         if (err)
 262                 return err;
 263
 264         mutex_lock(&data->update_lock);
 265         data->in_min[nr] = IN_TO_REG(val);
 266         sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
 267         mutex_unlock(&data->update_lock);
 268         return count;
 269 }
 270
 271 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
 272                           const char *buf, size_t count)
 273 {
 274         struct sis5595_data *data = dev_get_drvdata(dev);
 275         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 276         int nr = attr->index;
 277         unsigned long val;
 278         int err;
 279
 280         err = kstrtoul(buf, 10, &val);
 281         if (err)
 282                 return err;
 283
 284         mutex_lock(&data->update_lock);
 285         data->in_max[nr] = IN_TO_REG(val);
 286         sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
 287         mutex_unlock(&data->update_lock);
 288         return count;
 289 }
 290
 291 #define show_in_offset(offset)                                  \
 292 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 293                 show_in, NULL, offset);                         \
 294 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 295                 show_in_min, set_in_min, offset);               \
 296 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 297                 show_in_max, set_in_max, offset);
 298
 299 show_in_offset(0);
 300 show_in_offset(1);
 301 show_in_offset(2);
 302 show_in_offset(3);
 303 show_in_offset(4);
 304
 305 /* Temperature */
 306 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 307                          char *buf)
 308 {
 309         struct sis5595_data *data = sis5595_update_device(dev);
 310         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
 311 }
 312
 313 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
 314                               char *buf)
 315 {
 316         struct sis5595_data *data = sis5595_update_device(dev);
 317         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
 318 }
 319
 320 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
 321                              const char *buf, size_t count)
 322 {
 323         struct sis5595_data *data = dev_get_drvdata(dev);
 324         long val;
 325         int err;
 326
 327         err = kstrtol(buf, 10, &val);
 328         if (err)
 329                 return err;
 330
 331         mutex_lock(&data->update_lock);
 332         data->temp_over = TEMP_TO_REG(val);
 333         sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
 334         mutex_unlock(&data->update_lock);
 335         return count;
 336 }
 337
 338 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
 339                               char *buf)
 340 {
 341         struct sis5595_data *data = sis5595_update_device(dev);
 342         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
 343 }
 344
 345 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
 346                              const char *buf, size_t count)
 347 {
 348         struct sis5595_data *data = dev_get_drvdata(dev);
 349         long val;
 350         int err;
 351
 352         err = kstrtol(buf, 10, &val);
 353         if (err)
 354                 return err;
 355
 356         mutex_lock(&data->update_lock);
 357         data->temp_hyst = TEMP_TO_REG(val);
 358         sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
 359         mutex_unlock(&data->update_lock);
 360         return count;
 361 }
 362
 363 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
 364 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 365                 show_temp_over, set_temp_over);
 366 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 367                 show_temp_hyst, set_temp_hyst);
 368
 369 /* 2 Fans */
 370 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
 371                         char *buf)
 372 {
 373         struct sis5595_data *data = sis5595_update_device(dev);
 374         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 375         int nr = attr->index;
 376         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 377                 DIV_FROM_REG(data->fan_div[nr])));
 378 }
 379
 380 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
 381                             char *buf)
 382 {
 383         struct sis5595_data *data = sis5595_update_device(dev);
 384         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 385         int nr = attr->index;
 386         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 387                 DIV_FROM_REG(data->fan_div[nr])));
 388 }
 389
 390 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
 391                            const char *buf, size_t count)
 392 {
 393         struct sis5595_data *data = dev_get_drvdata(dev);
 394         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 395         int nr = attr->index;
 396         unsigned long val;
 397         int err;
 398
 399         err = kstrtoul(buf, 10, &val);
 400         if (err)
 401                 return err;
 402
 403         mutex_lock(&data->update_lock);
 404         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 405         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 406         mutex_unlock(&data->update_lock);
 407         return count;
 408 }
 409
 410 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
 411                             char *buf)
 412 {
 413         struct sis5595_data *data = sis5595_update_device(dev);
 414         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 415         int nr = attr->index;
 416         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 417 }
 418
 419 /*
 420  * Note: we save and restore the fan minimum here, because its value is
 421  * determined in part by the fan divisor.  This follows the principle of
 422  * least surprise; the user doesn't expect the fan minimum to change just
 423  * because the divisor changed.
 424  */
 425 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
 426                            const char *buf, size_t count)
 427 {
 428         struct sis5595_data *data = dev_get_drvdata(dev);
 429         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 430         int nr = attr->index;
 431         unsigned long min;
 432         int reg;
 433         unsigned long val;
 434         int err;
 435
 436         err = kstrtoul(buf, 10, &val);
 437         if (err)
 438                 return err;
 439
 440         mutex_lock(&data->update_lock);
 441         min = FAN_FROM_REG(data->fan_min[nr],
 442                         DIV_FROM_REG(data->fan_div[nr]));
 443         reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
 444
 445         switch (val) {
 446         case 1:
 447                 data->fan_div[nr] = 0;
 448                 break;
 449         case 2:
 450                 data->fan_div[nr] = 1;
 451                 break;
 452         case 4:
 453                 data->fan_div[nr] = 2;
 454                 break;
 455         case 8:
 456                 data->fan_div[nr] = 3;
 457                 break;
 458         default:
 459                 dev_err(dev, "fan_div value %ld not "
 460                         "supported. Choose one of 1, 2, 4 or 8!\n", val);
 461                 mutex_unlock(&data->update_lock);
 462                 return -EINVAL;
 463         }
 464
 465         switch (nr) {
 466         case 0:
 467                 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
 468                 break;
 469         case 1:
 470                 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
 471                 break;
 472         }
 473         sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
 474         data->fan_min[nr] =
 475                 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 476         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 477         mutex_unlock(&data->update_lock);
 478         return count;
 479 }
 480
 481 #define show_fan_offset(offset)                                         \
 482 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
 483                 show_fan, NULL, offset - 1);                            \
 484 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
 485                 show_fan_min, set_fan_min, offset - 1);                 \
 486 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,         \
 487                 show_fan_div, set_fan_div, offset - 1);
 488
 489 show_fan_offset(1);
 490 show_fan_offset(2);
 491
 492 /* Alarms */
 493 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
 494                            char *buf)
 495 {
 496         struct sis5595_data *data = sis5595_update_device(dev);
 497         return sprintf(buf, "%d\n", data->alarms);
 498 }
 499 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 500
 501 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
 502                           char *buf)
 503 {
 504         struct sis5595_data *data = sis5595_update_device(dev);
 505         int nr = to_sensor_dev_attr(da)->index;
 506         return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
 507 }
 508 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 509 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 510 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 511 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 512 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
 513 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 514 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 515 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
 516
 517 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
 518                          char *buf)
 519 {
 520         struct sis5595_data *data = dev_get_drvdata(dev);
 521         return sprintf(buf, "%s\n", data->name);
 522 }
 523 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 524
 525 static struct attribute *sis5595_attributes[] = {
 526         &sensor_dev_attr_in0_input.dev_attr.attr,
 527         &sensor_dev_attr_in0_min.dev_attr.attr,
 528         &sensor_dev_attr_in0_max.dev_attr.attr,
 529         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 530         &sensor_dev_attr_in1_input.dev_attr.attr,
 531         &sensor_dev_attr_in1_min.dev_attr.attr,
 532         &sensor_dev_attr_in1_max.dev_attr.attr,
 533         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 534         &sensor_dev_attr_in2_input.dev_attr.attr,
 535         &sensor_dev_attr_in2_min.dev_attr.attr,
 536         &sensor_dev_attr_in2_max.dev_attr.attr,
 537         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 538         &sensor_dev_attr_in3_input.dev_attr.attr,
 539         &sensor_dev_attr_in3_min.dev_attr.attr,
 540         &sensor_dev_attr_in3_max.dev_attr.attr,
 541         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 542
 543         &sensor_dev_attr_fan1_input.dev_attr.attr,
 544         &sensor_dev_attr_fan1_min.dev_attr.attr,
 545         &sensor_dev_attr_fan1_div.dev_attr.attr,
 546         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 547         &sensor_dev_attr_fan2_input.dev_attr.attr,
 548         &sensor_dev_attr_fan2_min.dev_attr.attr,
 549         &sensor_dev_attr_fan2_div.dev_attr.attr,
 550         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 551
 552         &dev_attr_alarms.attr,
 553         &dev_attr_name.attr,
 554         NULL
 555 };
 556
 557 static const struct attribute_group sis5595_group = {
 558         .attrs = sis5595_attributes,
 559 };
 560
 561 static struct attribute *sis5595_attributes_in4[] = {
 562         &sensor_dev_attr_in4_input.dev_attr.attr,
 563         &sensor_dev_attr_in4_min.dev_attr.attr,
 564         &sensor_dev_attr_in4_max.dev_attr.attr,
 565         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 566         NULL
 567 };
 568
 569 static const struct attribute_group sis5595_group_in4 = {
 570         .attrs = sis5595_attributes_in4,
 571 };
 572
 573 static struct attribute *sis5595_attributes_temp1[] = {
 574         &dev_attr_temp1_input.attr,
 575         &dev_attr_temp1_max.attr,
 576         &dev_attr_temp1_max_hyst.attr,
 577         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 578         NULL
 579 };
 580
 581 static const struct attribute_group sis5595_group_temp1 = {
 582         .attrs = sis5595_attributes_temp1,
 583 };
 584
 585 /* This is called when the module is loaded */
 586 static int __devinit sis5595_probe(struct platform_device *pdev)
 587 {
 588         int err = 0;
 589         int i;
 590         struct sis5595_data *data;
 591         struct resource *res;
 592         char val;
 593
 594         /* Reserve the ISA region */
 595         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 596         if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
 597                                  sis5595_driver.driver.name))
 598                 return -EBUSY;
 599
 600         data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
 601                             GFP_KERNEL);
 602         if (!data)
 603                 return -ENOMEM;
 604
 605         mutex_init(&data->lock);
 606         mutex_init(&data->update_lock);
 607         data->addr = res->start;
 608         data->name = "sis5595";
 609         platform_set_drvdata(pdev, data);
 610
 611         /*
 612          * Check revision and pin registers to determine whether 4 or 5 voltages
 613          */
 614         data->revision = s_bridge->revision;
 615         /* 4 voltages, 1 temp */
 616         data->maxins = 3;
 617         if (data->revision >= REV2MIN) {
 618                 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
 619                 if (!(val & 0x80))
 620                         /* 5 voltages, no temps */
 621                         data->maxins = 4;
 622         }
 623
 624         /* Initialize the SIS5595 chip */
 625         sis5595_init_device(data);
 626
 627         /* A few vars need to be filled upon startup */
 628         for (i = 0; i < 2; i++) {
 629                 data->fan_min[i] = sis5595_read_value(data,
 630                                         SIS5595_REG_FAN_MIN(i));
 631         }
 632
 633         /* Register sysfs hooks */
 634         err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
 635         if (err)
 636                 return err;
 637         if (data->maxins == 4) {
 638                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
 639                 if (err)
 640                         goto exit_remove_files;
 641         } else {
 642                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
 643                 if (err)
 644                         goto exit_remove_files;
 645         }
 646
 647         data->hwmon_dev = hwmon_device_register(&pdev->dev);
 648         if (IS_ERR(data->hwmon_dev)) {
 649                 err = PTR_ERR(data->hwmon_dev);
 650                 goto exit_remove_files;
 651         }
 652
 653         return 0;
 654
 655 exit_remove_files:
 656         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 657         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 658         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 659         return err;
 660 }
 661
 662 static int __devexit sis5595_remove(struct platform_device *pdev)
 663 {
 664         struct sis5595_data *data = platform_get_drvdata(pdev);
 665
 666         hwmon_device_unregister(data->hwmon_dev);
 667         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 668         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 669         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 670
 671         return 0;
 672 }
 673
 674
 675 /* ISA access must be locked explicitly. */
 676 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
 677 {
 678         int res;
 679
 680         mutex_lock(&data->lock);
 681         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 682         res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
 683         mutex_unlock(&data->lock);
 684         return res;
 685 }
 686
 687 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
 688 {
 689         mutex_lock(&data->lock);
 690         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 691         outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
 692         mutex_unlock(&data->lock);
 693 }
 694
 695 /* Called when we have found a new SIS5595. */
 696 static void __devinit sis5595_init_device(struct sis5595_data *data)
 697 {
 698         u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
 699         if (!(config & 0x01))
 700                 sis5595_write_value(data, SIS5595_REG_CONFIG,
 701                                 (config & 0xf7) | 0x01);
 702 }
 703
 704 static struct sis5595_data *sis5595_update_device(struct device *dev)
 705 {
 706         struct sis5595_data *data = dev_get_drvdata(dev);
 707         int i;
 708
 709         mutex_lock(&data->update_lock);
 710
 711         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 712             || !data->valid) {
 713
 714                 for (i = 0; i <= data->maxins; i++) {
 715                         data->in[i] =
 716                             sis5595_read_value(data, SIS5595_REG_IN(i));
 717                         data->in_min[i] =
 718                             sis5595_read_value(data,
 719                                                SIS5595_REG_IN_MIN(i));
 720                         data->in_max[i] =
 721                             sis5595_read_value(data,
 722                                                SIS5595_REG_IN_MAX(i));
 723                 }
 724                 for (i = 0; i < 2; i++) {
 725                         data->fan[i] =
 726                             sis5595_read_value(data, SIS5595_REG_FAN(i));
 727                         data->fan_min[i] =
 728                             sis5595_read_value(data,
 729                                                SIS5595_REG_FAN_MIN(i));
 730                 }
 731                 if (data->maxins == 3) {
 732                         data->temp =
 733                             sis5595_read_value(data, SIS5595_REG_TEMP);
 734                         data->temp_over =
 735                             sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
 736                         data->temp_hyst =
 737                             sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
 738                 }
 739                 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
 740                 data->fan_div[0] = (i >> 4) & 0x03;
 741                 data->fan_div[1] = i >> 6;
 742                 data->alarms =
 743                     sis5595_read_value(data, SIS5595_REG_ALARM1) |
 744                     (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
 745                 data->last_updated = jiffies;
 746                 data->valid = 1;
 747         }
 748
 749         mutex_unlock(&data->update_lock);
 750
 751         return data;
 752 }
 753
 754 static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = {
 755         { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
 756         { 0, }
 757 };
 758
 759 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
 760
 761 static int blacklist[] __devinitdata = {
 762         PCI_DEVICE_ID_SI_540,
 763         PCI_DEVICE_ID_SI_550,
 764         PCI_DEVICE_ID_SI_630,
 765         PCI_DEVICE_ID_SI_645,
 766         PCI_DEVICE_ID_SI_730,
 767         PCI_DEVICE_ID_SI_735,
 768         PCI_DEVICE_ID_SI_5511, /*
 769                                 * 5513 chip has the 0008 device but
 770                                 * that ID shows up in other chips so we
 771                                 * use the 5511 ID for recognition
 772                                 */
 773         PCI_DEVICE_ID_SI_5597,
 774         PCI_DEVICE_ID_SI_5598,
 775         0 };
 776
 777 static int __devinit sis5595_device_add(unsigned short address)
 778 {
 779         struct resource res = {
 780                 .start  = address,
 781                 .end    = address + SIS5595_EXTENT - 1,
 782                 .name   = "sis5595",
 783                 .flags  = IORESOURCE_IO,
 784         };
 785         int err;
 786
 787         err = acpi_check_resource_conflict(&res);
 788         if (err)
 789                 goto exit;
 790
 791         pdev = platform_device_alloc("sis5595", address);
 792         if (!pdev) {
 793                 err = -ENOMEM;
 794                 pr_err("Device allocation failed\n");
 795                 goto exit;
 796         }
 797
 798         err = platform_device_add_resources(pdev, &res, 1);
 799         if (err) {
 800                 pr_err("Device resource addition failed (%d)\n", err);
 801                 goto exit_device_put;
 802         }
 803
 804         err = platform_device_add(pdev);
 805         if (err) {
 806                 pr_err("Device addition failed (%d)\n", err);
 807                 goto exit_device_put;
 808         }
 809
 810         return 0;
 811
 812 exit_device_put:
 813         platform_device_put(pdev);
 814 exit:
 815         return err;
 816 }
 817
 818 static int __devinit sis5595_pci_probe(struct pci_dev *dev,
 819                                        const struct pci_device_id *id)
 820 {
 821         u16 address;
 822         u8 enable;
 823         int *i;
 824
 825         for (i = blacklist; *i != 0; i++) {
 826                 struct pci_dev *d;
 827                 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
 828                 if (d) {
 829                         dev_err(&d->dev,
 830                                 "Looked for SIS5595 but found unsupported device %.4x\n",
 831                                 *i);
 832                         pci_dev_put(d);
 833                         return -ENODEV;
 834                 }
 835         }
 836
 837         force_addr &= ~(SIS5595_EXTENT - 1);
 838         if (force_addr) {
 839                 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
 840                 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
 841         }
 842
 843         if (PCIBIOS_SUCCESSFUL !=
 844             pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
 845                 dev_err(&dev->dev, "Failed to read ISA address\n");
 846                 return -ENODEV;
 847         }
 848
 849         address &= ~(SIS5595_EXTENT - 1);
 850         if (!address) {
 851                 dev_err(&dev->dev,
 852                         "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
 853                 return -ENODEV;
 854         }
 855         if (force_addr && address != force_addr) {
 856                 /* doesn't work for some chips? */
 857                 dev_err(&dev->dev, "Failed to force ISA address\n");
 858                 return -ENODEV;
 859         }
 860
 861         if (PCIBIOS_SUCCESSFUL !=
 862             pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
 863                 dev_err(&dev->dev, "Failed to read enable register\n");
 864                 return -ENODEV;
 865         }
 866         if (!(enable & 0x80)) {
 867                 if ((PCIBIOS_SUCCESSFUL !=
 868                      pci_write_config_byte(dev, SIS5595_ENABLE_REG,
 869                                            enable | 0x80))
 870                  || (PCIBIOS_SUCCESSFUL !=
 871                      pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
 872                  || (!(enable & 0x80))) {
 873                         /* doesn't work for some chips! */
 874                         dev_err(&dev->dev, "Failed to enable HWM device\n");
 875                         return -ENODEV;
 876                 }
 877         }
 878
 879         if (platform_driver_register(&sis5595_driver)) {
 880                 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
 881                 goto exit;
 882         }
 883
 884         s_bridge = pci_dev_get(dev);
 885         /* Sets global pdev as a side effect */
 886         if (sis5595_device_add(address))
 887                 goto exit_unregister;
 888
 889         /*
 890          * Always return failure here.  This is to allow other drivers to bind
 891          * to this pci device.  We don't really want to have control over the
 892          * pci device, we only wanted to read as few register values from it.
 893          */
 894         return -ENODEV;
 895
 896 exit_unregister:
 897         pci_dev_put(dev);
 898         platform_driver_unregister(&sis5595_driver);
 899 exit:
 900         return -ENODEV;
 901 }
 902
 903 static struct pci_driver sis5595_pci_driver = {
 904         .name            = "sis5595",
 905         .id_table        = sis5595_pci_ids,
 906         .probe           = sis5595_pci_probe,
 907 };
 908
 909 static int __init sm_sis5595_init(void)
 910 {
 911         return pci_register_driver(&sis5595_pci_driver);
 912 }
 913
 914 static void __exit sm_sis5595_exit(void)
 915 {
 916         pci_unregister_driver(&sis5595_pci_driver);
 917         if (s_bridge != NULL) {
 918                 platform_device_unregister(pdev);
 919                 platform_driver_unregister(&sis5595_driver);
 920                 pci_dev_put(s_bridge);
 921                 s_bridge = NULL;
 922         }
 923 }
 924
 925 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
 926 MODULE_DESCRIPTION("SiS 5595 Sensor device");
 927 MODULE_LICENSE("GPL");
 928
 929 module_init(sm_sis5595_init);
 930 module_exit(sm_sis5595_exit);