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 <jdelvare@suse.de>
  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 = clamp_val(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         if (rpm > 1350000)
 145                 return 1;
 146         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 147 }
 148
 149 static inline int FAN_FROM_REG(u8 val, int div)
 150 {
 151         return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
 152 }
 153
 154 /*
 155  * TEMP: mC (-54.12C to +157.53C)
 156  * REG: 0.83C/bit + 52.12, two's complement
 157  */
 158 static inline int TEMP_FROM_REG(s8 val)
 159 {
 160         return val * 830 + 52120;
 161 }
 162 static inline s8 TEMP_TO_REG(long val)
 163 {
 164         int nval = clamp_val(val, -54120, 157530) ;
 165         return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
 166 }
 167
 168 /*
 169  * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
 170  * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
 171  */
 172 static inline u8 DIV_TO_REG(int val)
 173 {
 174         return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
 175 }
 176 #define DIV_FROM_REG(val) (1 << (val))
 177
 178 /*
 179  * For each registered chip, we need to keep some data in memory.
 180  * The structure is dynamically allocated.
 181  */
 182 struct sis5595_data {
 183         unsigned short addr;
 184         const char *name;
 185         struct device *hwmon_dev;
 186         struct mutex lock;
 187
 188         struct mutex update_lock;
 189         char valid;             /* !=0 if following fields are valid */
 190         unsigned long last_updated;     /* In jiffies */
 191         char maxins;            /* == 3 if temp enabled, otherwise == 4 */
 192         u8 revision;            /* Reg. value */
 193
 194         u8 in[5];               /* Register value */
 195         u8 in_max[5];           /* Register value */
 196         u8 in_min[5];           /* Register value */
 197         u8 fan[2];              /* Register value */
 198         u8 fan_min[2];          /* Register value */
 199         s8 temp;                /* Register value */
 200         s8 temp_over;           /* Register value */
 201         s8 temp_hyst;           /* Register value */
 202         u8 fan_div[2];          /* Register encoding, shifted right */
 203         u16 alarms;             /* Register encoding, combined */
 204 };
 205
 206 static struct pci_dev *s_bridge;        /* pointer to the (only) sis5595 */
 207
 208 static int sis5595_probe(struct platform_device *pdev);
 209 static int sis5595_remove(struct platform_device *pdev);
 210
 211 static int sis5595_read_value(struct sis5595_data *data, u8 reg);
 212 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
 213 static struct sis5595_data *sis5595_update_device(struct device *dev);
 214 static void sis5595_init_device(struct sis5595_data *data);
 215
 216 static struct platform_driver sis5595_driver = {
 217         .driver = {
 218                 .owner  = THIS_MODULE,
 219                 .name   = "sis5595",
 220         },
 221         .probe          = sis5595_probe,
 222         .remove         = sis5595_remove,
 223 };
 224
 225 /* 4 Voltages */
 226 static ssize_t show_in(struct device *dev, struct device_attribute *da,
 227                        char *buf)
 228 {
 229         struct sis5595_data *data = sis5595_update_device(dev);
 230         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 231         int nr = attr->index;
 232         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
 233 }
 234
 235 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
 236                            char *buf)
 237 {
 238         struct sis5595_data *data = sis5595_update_device(dev);
 239         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 240         int nr = attr->index;
 241         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
 242 }
 243
 244 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
 245                            char *buf)
 246 {
 247         struct sis5595_data *data = sis5595_update_device(dev);
 248         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 249         int nr = attr->index;
 250         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
 251 }
 252
 253 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
 254                           const char *buf, size_t count)
 255 {
 256         struct sis5595_data *data = dev_get_drvdata(dev);
 257         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 258         int nr = attr->index;
 259         unsigned long val;
 260         int err;
 261
 262         err = kstrtoul(buf, 10, &val);
 263         if (err)
 264                 return err;
 265
 266         mutex_lock(&data->update_lock);
 267         data->in_min[nr] = IN_TO_REG(val);
 268         sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
 269         mutex_unlock(&data->update_lock);
 270         return count;
 271 }
 272
 273 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
 274                           const char *buf, size_t count)
 275 {
 276         struct sis5595_data *data = dev_get_drvdata(dev);
 277         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 278         int nr = attr->index;
 279         unsigned long val;
 280         int err;
 281
 282         err = kstrtoul(buf, 10, &val);
 283         if (err)
 284                 return err;
 285
 286         mutex_lock(&data->update_lock);
 287         data->in_max[nr] = IN_TO_REG(val);
 288         sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
 289         mutex_unlock(&data->update_lock);
 290         return count;
 291 }
 292
 293 #define show_in_offset(offset)                                  \
 294 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 295                 show_in, NULL, offset);                         \
 296 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 297                 show_in_min, set_in_min, offset);               \
 298 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 299                 show_in_max, set_in_max, offset);
 300
 301 show_in_offset(0);
 302 show_in_offset(1);
 303 show_in_offset(2);
 304 show_in_offset(3);
 305 show_in_offset(4);
 306
 307 /* Temperature */
 308 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 309                          char *buf)
 310 {
 311         struct sis5595_data *data = sis5595_update_device(dev);
 312         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
 313 }
 314
 315 static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr,
 316                               char *buf)
 317 {
 318         struct sis5595_data *data = sis5595_update_device(dev);
 319         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
 320 }
 321
 322 static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr,
 323                              const char *buf, size_t count)
 324 {
 325         struct sis5595_data *data = dev_get_drvdata(dev);
 326         long val;
 327         int err;
 328
 329         err = kstrtol(buf, 10, &val);
 330         if (err)
 331                 return err;
 332
 333         mutex_lock(&data->update_lock);
 334         data->temp_over = TEMP_TO_REG(val);
 335         sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
 336         mutex_unlock(&data->update_lock);
 337         return count;
 338 }
 339
 340 static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr,
 341                               char *buf)
 342 {
 343         struct sis5595_data *data = sis5595_update_device(dev);
 344         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
 345 }
 346
 347 static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr,
 348                              const char *buf, size_t count)
 349 {
 350         struct sis5595_data *data = dev_get_drvdata(dev);
 351         long val;
 352         int err;
 353
 354         err = kstrtol(buf, 10, &val);
 355         if (err)
 356                 return err;
 357
 358         mutex_lock(&data->update_lock);
 359         data->temp_hyst = TEMP_TO_REG(val);
 360         sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
 361         mutex_unlock(&data->update_lock);
 362         return count;
 363 }
 364
 365 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
 366 static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 367                 show_temp_over, set_temp_over);
 368 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 369                 show_temp_hyst, set_temp_hyst);
 370
 371 /* 2 Fans */
 372 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
 373                         char *buf)
 374 {
 375         struct sis5595_data *data = sis5595_update_device(dev);
 376         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 377         int nr = attr->index;
 378         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 379                 DIV_FROM_REG(data->fan_div[nr])));
 380 }
 381
 382 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
 383                             char *buf)
 384 {
 385         struct sis5595_data *data = sis5595_update_device(dev);
 386         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 387         int nr = attr->index;
 388         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 389                 DIV_FROM_REG(data->fan_div[nr])));
 390 }
 391
 392 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
 393                            const char *buf, size_t count)
 394 {
 395         struct sis5595_data *data = dev_get_drvdata(dev);
 396         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 397         int nr = attr->index;
 398         unsigned long val;
 399         int err;
 400
 401         err = kstrtoul(buf, 10, &val);
 402         if (err)
 403                 return err;
 404
 405         mutex_lock(&data->update_lock);
 406         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 407         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 408         mutex_unlock(&data->update_lock);
 409         return count;
 410 }
 411
 412 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
 413                             char *buf)
 414 {
 415         struct sis5595_data *data = sis5595_update_device(dev);
 416         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 417         int nr = attr->index;
 418         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 419 }
 420
 421 /*
 422  * Note: we save and restore the fan minimum here, because its value is
 423  * determined in part by the fan divisor.  This follows the principle of
 424  * least surprise; the user doesn't expect the fan minimum to change just
 425  * because the divisor changed.
 426  */
 427 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
 428                            const char *buf, size_t count)
 429 {
 430         struct sis5595_data *data = dev_get_drvdata(dev);
 431         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 432         int nr = attr->index;
 433         unsigned long min;
 434         int reg;
 435         unsigned long val;
 436         int err;
 437
 438         err = kstrtoul(buf, 10, &val);
 439         if (err)
 440                 return err;
 441
 442         mutex_lock(&data->update_lock);
 443         min = FAN_FROM_REG(data->fan_min[nr],
 444                         DIV_FROM_REG(data->fan_div[nr]));
 445         reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
 446
 447         switch (val) {
 448         case 1:
 449                 data->fan_div[nr] = 0;
 450                 break;
 451         case 2:
 452                 data->fan_div[nr] = 1;
 453                 break;
 454         case 4:
 455                 data->fan_div[nr] = 2;
 456                 break;
 457         case 8:
 458                 data->fan_div[nr] = 3;
 459                 break;
 460         default:
 461                 dev_err(dev,
 462                         "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
 463                         val);
 464                 mutex_unlock(&data->update_lock);
 465                 return -EINVAL;
 466         }
 467
 468         switch (nr) {
 469         case 0:
 470                 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
 471                 break;
 472         case 1:
 473                 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
 474                 break;
 475         }
 476         sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
 477         data->fan_min[nr] =
 478                 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 479         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 480         mutex_unlock(&data->update_lock);
 481         return count;
 482 }
 483
 484 #define show_fan_offset(offset)                                         \
 485 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
 486                 show_fan, NULL, offset - 1);                            \
 487 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
 488                 show_fan_min, set_fan_min, offset - 1);                 \
 489 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,         \
 490                 show_fan_div, set_fan_div, offset - 1);
 491
 492 show_fan_offset(1);
 493 show_fan_offset(2);
 494
 495 /* Alarms */
 496 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
 497                            char *buf)
 498 {
 499         struct sis5595_data *data = sis5595_update_device(dev);
 500         return sprintf(buf, "%d\n", data->alarms);
 501 }
 502 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 503
 504 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
 505                           char *buf)
 506 {
 507         struct sis5595_data *data = sis5595_update_device(dev);
 508         int nr = to_sensor_dev_attr(da)->index;
 509         return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
 510 }
 511 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 512 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 513 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 514 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 515 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
 516 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 517 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 518 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
 519
 520 static ssize_t show_name(struct device *dev, struct device_attribute *attr,
 521                          char *buf)
 522 {
 523         struct sis5595_data *data = dev_get_drvdata(dev);
 524         return sprintf(buf, "%s\n", data->name);
 525 }
 526 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 527
 528 static struct attribute *sis5595_attributes[] = {
 529         &sensor_dev_attr_in0_input.dev_attr.attr,
 530         &sensor_dev_attr_in0_min.dev_attr.attr,
 531         &sensor_dev_attr_in0_max.dev_attr.attr,
 532         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 533         &sensor_dev_attr_in1_input.dev_attr.attr,
 534         &sensor_dev_attr_in1_min.dev_attr.attr,
 535         &sensor_dev_attr_in1_max.dev_attr.attr,
 536         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 537         &sensor_dev_attr_in2_input.dev_attr.attr,
 538         &sensor_dev_attr_in2_min.dev_attr.attr,
 539         &sensor_dev_attr_in2_max.dev_attr.attr,
 540         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 541         &sensor_dev_attr_in3_input.dev_attr.attr,
 542         &sensor_dev_attr_in3_min.dev_attr.attr,
 543         &sensor_dev_attr_in3_max.dev_attr.attr,
 544         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 545
 546         &sensor_dev_attr_fan1_input.dev_attr.attr,
 547         &sensor_dev_attr_fan1_min.dev_attr.attr,
 548         &sensor_dev_attr_fan1_div.dev_attr.attr,
 549         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 550         &sensor_dev_attr_fan2_input.dev_attr.attr,
 551         &sensor_dev_attr_fan2_min.dev_attr.attr,
 552         &sensor_dev_attr_fan2_div.dev_attr.attr,
 553         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 554
 555         &dev_attr_alarms.attr,
 556         &dev_attr_name.attr,
 557         NULL
 558 };
 559
 560 static const struct attribute_group sis5595_group = {
 561         .attrs = sis5595_attributes,
 562 };
 563
 564 static struct attribute *sis5595_attributes_in4[] = {
 565         &sensor_dev_attr_in4_input.dev_attr.attr,
 566         &sensor_dev_attr_in4_min.dev_attr.attr,
 567         &sensor_dev_attr_in4_max.dev_attr.attr,
 568         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 569         NULL
 570 };
 571
 572 static const struct attribute_group sis5595_group_in4 = {
 573         .attrs = sis5595_attributes_in4,
 574 };
 575
 576 static struct attribute *sis5595_attributes_temp1[] = {
 577         &dev_attr_temp1_input.attr,
 578         &dev_attr_temp1_max.attr,
 579         &dev_attr_temp1_max_hyst.attr,
 580         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 581         NULL
 582 };
 583
 584 static const struct attribute_group sis5595_group_temp1 = {
 585         .attrs = sis5595_attributes_temp1,
 586 };
 587
 588 /* This is called when the module is loaded */
 589 static int sis5595_probe(struct platform_device *pdev)
 590 {
 591         int err = 0;
 592         int i;
 593         struct sis5595_data *data;
 594         struct resource *res;
 595         char val;
 596
 597         /* Reserve the ISA region */
 598         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 599         if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
 600                                  sis5595_driver.driver.name))
 601                 return -EBUSY;
 602
 603         data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
 604                             GFP_KERNEL);
 605         if (!data)
 606                 return -ENOMEM;
 607
 608         mutex_init(&data->lock);
 609         mutex_init(&data->update_lock);
 610         data->addr = res->start;
 611         data->name = "sis5595";
 612         platform_set_drvdata(pdev, data);
 613
 614         /*
 615          * Check revision and pin registers to determine whether 4 or 5 voltages
 616          */
 617         data->revision = s_bridge->revision;
 618         /* 4 voltages, 1 temp */
 619         data->maxins = 3;
 620         if (data->revision >= REV2MIN) {
 621                 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
 622                 if (!(val & 0x80))
 623                         /* 5 voltages, no temps */
 624                         data->maxins = 4;
 625         }
 626
 627         /* Initialize the SIS5595 chip */
 628         sis5595_init_device(data);
 629
 630         /* A few vars need to be filled upon startup */
 631         for (i = 0; i < 2; i++) {
 632                 data->fan_min[i] = sis5595_read_value(data,
 633                                         SIS5595_REG_FAN_MIN(i));
 634         }
 635
 636         /* Register sysfs hooks */
 637         err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
 638         if (err)
 639                 return err;
 640         if (data->maxins == 4) {
 641                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
 642                 if (err)
 643                         goto exit_remove_files;
 644         } else {
 645                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
 646                 if (err)
 647                         goto exit_remove_files;
 648         }
 649
 650         data->hwmon_dev = hwmon_device_register(&pdev->dev);
 651         if (IS_ERR(data->hwmon_dev)) {
 652                 err = PTR_ERR(data->hwmon_dev);
 653                 goto exit_remove_files;
 654         }
 655
 656         return 0;
 657
 658 exit_remove_files:
 659         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 660         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 661         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 662         return err;
 663 }
 664
 665 static int sis5595_remove(struct platform_device *pdev)
 666 {
 667         struct sis5595_data *data = platform_get_drvdata(pdev);
 668
 669         hwmon_device_unregister(data->hwmon_dev);
 670         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 671         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 672         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 673
 674         return 0;
 675 }
 676
 677
 678 /* ISA access must be locked explicitly. */
 679 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
 680 {
 681         int res;
 682
 683         mutex_lock(&data->lock);
 684         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 685         res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
 686         mutex_unlock(&data->lock);
 687         return res;
 688 }
 689
 690 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
 691 {
 692         mutex_lock(&data->lock);
 693         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 694         outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
 695         mutex_unlock(&data->lock);
 696 }
 697
 698 /* Called when we have found a new SIS5595. */
 699 static void sis5595_init_device(struct sis5595_data *data)
 700 {
 701         u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
 702         if (!(config & 0x01))
 703                 sis5595_write_value(data, SIS5595_REG_CONFIG,
 704                                 (config & 0xf7) | 0x01);
 705 }
 706
 707 static struct sis5595_data *sis5595_update_device(struct device *dev)
 708 {
 709         struct sis5595_data *data = dev_get_drvdata(dev);
 710         int i;
 711
 712         mutex_lock(&data->update_lock);
 713
 714         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 715             || !data->valid) {
 716
 717                 for (i = 0; i <= data->maxins; i++) {
 718                         data->in[i] =
 719                             sis5595_read_value(data, SIS5595_REG_IN(i));
 720                         data->in_min[i] =
 721                             sis5595_read_value(data,
 722                                                SIS5595_REG_IN_MIN(i));
 723                         data->in_max[i] =
 724                             sis5595_read_value(data,
 725                                                SIS5595_REG_IN_MAX(i));
 726                 }
 727                 for (i = 0; i < 2; i++) {
 728                         data->fan[i] =
 729                             sis5595_read_value(data, SIS5595_REG_FAN(i));
 730                         data->fan_min[i] =
 731                             sis5595_read_value(data,
 732                                                SIS5595_REG_FAN_MIN(i));
 733                 }
 734                 if (data->maxins == 3) {
 735                         data->temp =
 736                             sis5595_read_value(data, SIS5595_REG_TEMP);
 737                         data->temp_over =
 738                             sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
 739                         data->temp_hyst =
 740                             sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
 741                 }
 742                 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
 743                 data->fan_div[0] = (i >> 4) & 0x03;
 744                 data->fan_div[1] = i >> 6;
 745                 data->alarms =
 746                     sis5595_read_value(data, SIS5595_REG_ALARM1) |
 747                     (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
 748                 data->last_updated = jiffies;
 749                 data->valid = 1;
 750         }
 751
 752         mutex_unlock(&data->update_lock);
 753
 754         return data;
 755 }
 756
 757 static const struct pci_device_id sis5595_pci_ids[] = {
 758         { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
 759         { 0, }
 760 };
 761
 762 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
 763
 764 static int blacklist[] = {
 765         PCI_DEVICE_ID_SI_540,
 766         PCI_DEVICE_ID_SI_550,
 767         PCI_DEVICE_ID_SI_630,
 768         PCI_DEVICE_ID_SI_645,
 769         PCI_DEVICE_ID_SI_730,
 770         PCI_DEVICE_ID_SI_735,
 771         PCI_DEVICE_ID_SI_5511, /*
 772                                 * 5513 chip has the 0008 device but
 773                                 * that ID shows up in other chips so we
 774                                 * use the 5511 ID for recognition
 775                                 */
 776         PCI_DEVICE_ID_SI_5597,
 777         PCI_DEVICE_ID_SI_5598,
 778         0 };
 779
 780 static int sis5595_device_add(unsigned short address)
 781 {
 782         struct resource res = {
 783                 .start  = address,
 784                 .end    = address + SIS5595_EXTENT - 1,
 785                 .name   = "sis5595",
 786                 .flags  = IORESOURCE_IO,
 787         };
 788         int err;
 789
 790         err = acpi_check_resource_conflict(&res);
 791         if (err)
 792                 goto exit;
 793
 794         pdev = platform_device_alloc("sis5595", address);
 795         if (!pdev) {
 796                 err = -ENOMEM;
 797                 pr_err("Device allocation failed\n");
 798                 goto exit;
 799         }
 800
 801         err = platform_device_add_resources(pdev, &res, 1);
 802         if (err) {
 803                 pr_err("Device resource addition failed (%d)\n", err);
 804                 goto exit_device_put;
 805         }
 806
 807         err = platform_device_add(pdev);
 808         if (err) {
 809                 pr_err("Device addition failed (%d)\n", err);
 810                 goto exit_device_put;
 811         }
 812
 813         return 0;
 814
 815 exit_device_put:
 816         platform_device_put(pdev);
 817 exit:
 818         return err;
 819 }
 820
 821 static int sis5595_pci_probe(struct pci_dev *dev,
 822                                        const struct pci_device_id *id)
 823 {
 824         u16 address;
 825         u8 enable;
 826         int *i;
 827
 828         for (i = blacklist; *i != 0; i++) {
 829                 struct pci_dev *d;
 830                 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
 831                 if (d) {
 832                         dev_err(&d->dev,
 833                                 "Looked for SIS5595 but found unsupported device %.4x\n",
 834                                 *i);
 835                         pci_dev_put(d);
 836                         return -ENODEV;
 837                 }
 838         }
 839
 840         force_addr &= ~(SIS5595_EXTENT - 1);
 841         if (force_addr) {
 842                 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
 843                 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
 844         }
 845
 846         if (PCIBIOS_SUCCESSFUL !=
 847             pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
 848                 dev_err(&dev->dev, "Failed to read ISA address\n");
 849                 return -ENODEV;
 850         }
 851
 852         address &= ~(SIS5595_EXTENT - 1);
 853         if (!address) {
 854                 dev_err(&dev->dev,
 855                         "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
 856                 return -ENODEV;
 857         }
 858         if (force_addr && address != force_addr) {
 859                 /* doesn't work for some chips? */
 860                 dev_err(&dev->dev, "Failed to force ISA address\n");
 861                 return -ENODEV;
 862         }
 863
 864         if (PCIBIOS_SUCCESSFUL !=
 865             pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
 866                 dev_err(&dev->dev, "Failed to read enable register\n");
 867                 return -ENODEV;
 868         }
 869         if (!(enable & 0x80)) {
 870                 if ((PCIBIOS_SUCCESSFUL !=
 871                      pci_write_config_byte(dev, SIS5595_ENABLE_REG,
 872                                            enable | 0x80))
 873                  || (PCIBIOS_SUCCESSFUL !=
 874                      pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
 875                  || (!(enable & 0x80))) {
 876                         /* doesn't work for some chips! */
 877                         dev_err(&dev->dev, "Failed to enable HWM device\n");
 878                         return -ENODEV;
 879                 }
 880         }
 881
 882         if (platform_driver_register(&sis5595_driver)) {
 883                 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
 884                 goto exit;
 885         }
 886
 887         s_bridge = pci_dev_get(dev);
 888         /* Sets global pdev as a side effect */
 889         if (sis5595_device_add(address))
 890                 goto exit_unregister;
 891
 892         /*
 893          * Always return failure here.  This is to allow other drivers to bind
 894          * to this pci device.  We don't really want to have control over the
 895          * pci device, we only wanted to read as few register values from it.
 896          */
 897         return -ENODEV;
 898
 899 exit_unregister:
 900         pci_dev_put(dev);
 901         platform_driver_unregister(&sis5595_driver);
 902 exit:
 903         return -ENODEV;
 904 }
 905
 906 static struct pci_driver sis5595_pci_driver = {
 907         .name            = "sis5595",
 908         .id_table        = sis5595_pci_ids,
 909         .probe           = sis5595_pci_probe,
 910 };
 911
 912 static int __init sm_sis5595_init(void)
 913 {
 914         return pci_register_driver(&sis5595_pci_driver);
 915 }
 916
 917 static void __exit sm_sis5595_exit(void)
 918 {
 919         pci_unregister_driver(&sis5595_pci_driver);
 920         if (s_bridge != NULL) {
 921                 platform_device_unregister(pdev);
 922                 platform_driver_unregister(&sis5595_driver);
 923                 pci_dev_put(s_bridge);
 924                 s_bridge = NULL;
 925         }
 926 }
 927
 928 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
 929 MODULE_DESCRIPTION("SiS 5595 Sensor device");
 930 MODULE_LICENSE("GPL");
 931
 932 module_init(sm_sis5595_init);
 933 module_exit(sm_sis5595_exit);