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                 .name   = "sis5595",
 219         },
 220         .probe          = sis5595_probe,
 221         .remove         = sis5595_remove,
 222 };
 223
 224 /* 4 Voltages */
 225 static ssize_t show_in(struct device *dev, struct device_attribute *da,
 226                        char *buf)
 227 {
 228         struct sis5595_data *data = sis5595_update_device(dev);
 229         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 230         int nr = attr->index;
 231         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
 232 }
 233
 234 static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
 235                            char *buf)
 236 {
 237         struct sis5595_data *data = sis5595_update_device(dev);
 238         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 239         int nr = attr->index;
 240         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
 241 }
 242
 243 static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
 244                            char *buf)
 245 {
 246         struct sis5595_data *data = sis5595_update_device(dev);
 247         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 248         int nr = attr->index;
 249         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
 250 }
 251
 252 static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
 253                           const char *buf, size_t count)
 254 {
 255         struct sis5595_data *data = dev_get_drvdata(dev);
 256         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 257         int nr = attr->index;
 258         unsigned long val;
 259         int err;
 260
 261         err = kstrtoul(buf, 10, &val);
 262         if (err)
 263                 return err;
 264
 265         mutex_lock(&data->update_lock);
 266         data->in_min[nr] = IN_TO_REG(val);
 267         sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
 268         mutex_unlock(&data->update_lock);
 269         return count;
 270 }
 271
 272 static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
 273                           const char *buf, size_t count)
 274 {
 275         struct sis5595_data *data = dev_get_drvdata(dev);
 276         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 277         int nr = attr->index;
 278         unsigned long val;
 279         int err;
 280
 281         err = kstrtoul(buf, 10, &val);
 282         if (err)
 283                 return err;
 284
 285         mutex_lock(&data->update_lock);
 286         data->in_max[nr] = IN_TO_REG(val);
 287         sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
 288         mutex_unlock(&data->update_lock);
 289         return count;
 290 }
 291
 292 #define show_in_offset(offset)                                  \
 293 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 294                 show_in, NULL, offset);                         \
 295 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 296                 show_in_min, set_in_min, offset);               \
 297 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 298                 show_in_max, set_in_max, offset);
 299
 300 show_in_offset(0);
 301 show_in_offset(1);
 302 show_in_offset(2);
 303 show_in_offset(3);
 304 show_in_offset(4);
 305
 306 /* Temperature */
 307 static ssize_t temp1_input_show(struct device *dev,
 308                                 struct device_attribute *attr, char *buf)
 309 {
 310         struct sis5595_data *data = sis5595_update_device(dev);
 311         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
 312 }
 313
 314 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
 315                               char *buf)
 316 {
 317         struct sis5595_data *data = sis5595_update_device(dev);
 318         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
 319 }
 320
 321 static ssize_t temp1_max_store(struct device *dev,
 322                                struct device_attribute *attr, const char *buf,
 323                                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 temp1_max_hyst_show(struct device *dev,
 341                                    struct device_attribute *attr, 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 temp1_max_hyst_store(struct device *dev,
 348                                     struct device_attribute *attr,
 349                                     const char *buf, size_t count)
 350 {
 351         struct sis5595_data *data = dev_get_drvdata(dev);
 352         long val;
 353         int err;
 354
 355         err = kstrtol(buf, 10, &val);
 356         if (err)
 357                 return err;
 358
 359         mutex_lock(&data->update_lock);
 360         data->temp_hyst = TEMP_TO_REG(val);
 361         sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
 362         mutex_unlock(&data->update_lock);
 363         return count;
 364 }
 365
 366 static DEVICE_ATTR_RO(temp1_input);
 367 static DEVICE_ATTR_RW(temp1_max);
 368 static DEVICE_ATTR_RW(temp1_max_hyst);
 369
 370 /* 2 Fans */
 371 static ssize_t show_fan(struct device *dev, struct device_attribute *da,
 372                         char *buf)
 373 {
 374         struct sis5595_data *data = sis5595_update_device(dev);
 375         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 376         int nr = attr->index;
 377         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 378                 DIV_FROM_REG(data->fan_div[nr])));
 379 }
 380
 381 static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
 382                             char *buf)
 383 {
 384         struct sis5595_data *data = sis5595_update_device(dev);
 385         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 386         int nr = attr->index;
 387         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 388                 DIV_FROM_REG(data->fan_div[nr])));
 389 }
 390
 391 static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
 392                            const char *buf, size_t count)
 393 {
 394         struct sis5595_data *data = dev_get_drvdata(dev);
 395         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 396         int nr = attr->index;
 397         unsigned long val;
 398         int err;
 399
 400         err = kstrtoul(buf, 10, &val);
 401         if (err)
 402                 return err;
 403
 404         mutex_lock(&data->update_lock);
 405         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 406         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 407         mutex_unlock(&data->update_lock);
 408         return count;
 409 }
 410
 411 static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
 412                             char *buf)
 413 {
 414         struct sis5595_data *data = sis5595_update_device(dev);
 415         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 416         int nr = attr->index;
 417         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 418 }
 419
 420 /*
 421  * Note: we save and restore the fan minimum here, because its value is
 422  * determined in part by the fan divisor.  This follows the principle of
 423  * least surprise; the user doesn't expect the fan minimum to change just
 424  * because the divisor changed.
 425  */
 426 static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
 427                            const char *buf, size_t count)
 428 {
 429         struct sis5595_data *data = dev_get_drvdata(dev);
 430         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 431         int nr = attr->index;
 432         unsigned long min;
 433         int reg;
 434         unsigned long val;
 435         int err;
 436
 437         err = kstrtoul(buf, 10, &val);
 438         if (err)
 439                 return err;
 440
 441         mutex_lock(&data->update_lock);
 442         min = FAN_FROM_REG(data->fan_min[nr],
 443                         DIV_FROM_REG(data->fan_div[nr]));
 444         reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
 445
 446         switch (val) {
 447         case 1:
 448                 data->fan_div[nr] = 0;
 449                 break;
 450         case 2:
 451                 data->fan_div[nr] = 1;
 452                 break;
 453         case 4:
 454                 data->fan_div[nr] = 2;
 455                 break;
 456         case 8:
 457                 data->fan_div[nr] = 3;
 458                 break;
 459         default:
 460                 dev_err(dev,
 461                         "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
 462                         val);
 463                 mutex_unlock(&data->update_lock);
 464                 return -EINVAL;
 465         }
 466
 467         switch (nr) {
 468         case 0:
 469                 reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
 470                 break;
 471         case 1:
 472                 reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
 473                 break;
 474         }
 475         sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
 476         data->fan_min[nr] =
 477                 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 478         sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 479         mutex_unlock(&data->update_lock);
 480         return count;
 481 }
 482
 483 #define show_fan_offset(offset)                                         \
 484 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
 485                 show_fan, NULL, offset - 1);                            \
 486 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
 487                 show_fan_min, set_fan_min, offset - 1);                 \
 488 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,         \
 489                 show_fan_div, set_fan_div, offset - 1);
 490
 491 show_fan_offset(1);
 492 show_fan_offset(2);
 493
 494 /* Alarms */
 495 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
 496                            char *buf)
 497 {
 498         struct sis5595_data *data = sis5595_update_device(dev);
 499         return sprintf(buf, "%d\n", data->alarms);
 500 }
 501 static DEVICE_ATTR_RO(alarms);
 502
 503 static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
 504                           char *buf)
 505 {
 506         struct sis5595_data *data = sis5595_update_device(dev);
 507         int nr = to_sensor_dev_attr(da)->index;
 508         return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
 509 }
 510 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 511 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 512 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 513 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 514 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
 515 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 516 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 517 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
 518
 519 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
 520                          char *buf)
 521 {
 522         struct sis5595_data *data = dev_get_drvdata(dev);
 523         return sprintf(buf, "%s\n", data->name);
 524 }
 525 static DEVICE_ATTR_RO(name);
 526
 527 static struct attribute *sis5595_attributes[] = {
 528         &sensor_dev_attr_in0_input.dev_attr.attr,
 529         &sensor_dev_attr_in0_min.dev_attr.attr,
 530         &sensor_dev_attr_in0_max.dev_attr.attr,
 531         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 532         &sensor_dev_attr_in1_input.dev_attr.attr,
 533         &sensor_dev_attr_in1_min.dev_attr.attr,
 534         &sensor_dev_attr_in1_max.dev_attr.attr,
 535         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 536         &sensor_dev_attr_in2_input.dev_attr.attr,
 537         &sensor_dev_attr_in2_min.dev_attr.attr,
 538         &sensor_dev_attr_in2_max.dev_attr.attr,
 539         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 540         &sensor_dev_attr_in3_input.dev_attr.attr,
 541         &sensor_dev_attr_in3_min.dev_attr.attr,
 542         &sensor_dev_attr_in3_max.dev_attr.attr,
 543         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 544
 545         &sensor_dev_attr_fan1_input.dev_attr.attr,
 546         &sensor_dev_attr_fan1_min.dev_attr.attr,
 547         &sensor_dev_attr_fan1_div.dev_attr.attr,
 548         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 549         &sensor_dev_attr_fan2_input.dev_attr.attr,
 550         &sensor_dev_attr_fan2_min.dev_attr.attr,
 551         &sensor_dev_attr_fan2_div.dev_attr.attr,
 552         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 553
 554         &dev_attr_alarms.attr,
 555         &dev_attr_name.attr,
 556         NULL
 557 };
 558
 559 static const struct attribute_group sis5595_group = {
 560         .attrs = sis5595_attributes,
 561 };
 562
 563 static struct attribute *sis5595_attributes_in4[] = {
 564         &sensor_dev_attr_in4_input.dev_attr.attr,
 565         &sensor_dev_attr_in4_min.dev_attr.attr,
 566         &sensor_dev_attr_in4_max.dev_attr.attr,
 567         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 568         NULL
 569 };
 570
 571 static const struct attribute_group sis5595_group_in4 = {
 572         .attrs = sis5595_attributes_in4,
 573 };
 574
 575 static struct attribute *sis5595_attributes_temp1[] = {
 576         &dev_attr_temp1_input.attr,
 577         &dev_attr_temp1_max.attr,
 578         &dev_attr_temp1_max_hyst.attr,
 579         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 580         NULL
 581 };
 582
 583 static const struct attribute_group sis5595_group_temp1 = {
 584         .attrs = sis5595_attributes_temp1,
 585 };
 586
 587 /* This is called when the module is loaded */
 588 static int sis5595_probe(struct platform_device *pdev)
 589 {
 590         int err = 0;
 591         int i;
 592         struct sis5595_data *data;
 593         struct resource *res;
 594         char val;
 595
 596         /* Reserve the ISA region */
 597         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 598         if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
 599                                  sis5595_driver.driver.name))
 600                 return -EBUSY;
 601
 602         data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
 603                             GFP_KERNEL);
 604         if (!data)
 605                 return -ENOMEM;
 606
 607         mutex_init(&data->lock);
 608         mutex_init(&data->update_lock);
 609         data->addr = res->start;
 610         data->name = "sis5595";
 611         platform_set_drvdata(pdev, data);
 612
 613         /*
 614          * Check revision and pin registers to determine whether 4 or 5 voltages
 615          */
 616         data->revision = s_bridge->revision;
 617         /* 4 voltages, 1 temp */
 618         data->maxins = 3;
 619         if (data->revision >= REV2MIN) {
 620                 pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
 621                 if (!(val & 0x80))
 622                         /* 5 voltages, no temps */
 623                         data->maxins = 4;
 624         }
 625
 626         /* Initialize the SIS5595 chip */
 627         sis5595_init_device(data);
 628
 629         /* A few vars need to be filled upon startup */
 630         for (i = 0; i < 2; i++) {
 631                 data->fan_min[i] = sis5595_read_value(data,
 632                                         SIS5595_REG_FAN_MIN(i));
 633         }
 634
 635         /* Register sysfs hooks */
 636         err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
 637         if (err)
 638                 return err;
 639         if (data->maxins == 4) {
 640                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
 641                 if (err)
 642                         goto exit_remove_files;
 643         } else {
 644                 err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
 645                 if (err)
 646                         goto exit_remove_files;
 647         }
 648
 649         data->hwmon_dev = hwmon_device_register(&pdev->dev);
 650         if (IS_ERR(data->hwmon_dev)) {
 651                 err = PTR_ERR(data->hwmon_dev);
 652                 goto exit_remove_files;
 653         }
 654
 655         return 0;
 656
 657 exit_remove_files:
 658         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 659         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 660         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 661         return err;
 662 }
 663
 664 static int sis5595_remove(struct platform_device *pdev)
 665 {
 666         struct sis5595_data *data = platform_get_drvdata(pdev);
 667
 668         hwmon_device_unregister(data->hwmon_dev);
 669         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 670         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 671         sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 672
 673         return 0;
 674 }
 675
 676
 677 /* ISA access must be locked explicitly. */
 678 static int sis5595_read_value(struct sis5595_data *data, u8 reg)
 679 {
 680         int res;
 681
 682         mutex_lock(&data->lock);
 683         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 684         res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
 685         mutex_unlock(&data->lock);
 686         return res;
 687 }
 688
 689 static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
 690 {
 691         mutex_lock(&data->lock);
 692         outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 693         outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
 694         mutex_unlock(&data->lock);
 695 }
 696
 697 /* Called when we have found a new SIS5595. */
 698 static void sis5595_init_device(struct sis5595_data *data)
 699 {
 700         u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
 701         if (!(config & 0x01))
 702                 sis5595_write_value(data, SIS5595_REG_CONFIG,
 703                                 (config & 0xf7) | 0x01);
 704 }
 705
 706 static struct sis5595_data *sis5595_update_device(struct device *dev)
 707 {
 708         struct sis5595_data *data = dev_get_drvdata(dev);
 709         int i;
 710
 711         mutex_lock(&data->update_lock);
 712
 713         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 714             || !data->valid) {
 715
 716                 for (i = 0; i <= data->maxins; i++) {
 717                         data->in[i] =
 718                             sis5595_read_value(data, SIS5595_REG_IN(i));
 719                         data->in_min[i] =
 720                             sis5595_read_value(data,
 721                                                SIS5595_REG_IN_MIN(i));
 722                         data->in_max[i] =
 723                             sis5595_read_value(data,
 724                                                SIS5595_REG_IN_MAX(i));
 725                 }
 726                 for (i = 0; i < 2; i++) {
 727                         data->fan[i] =
 728                             sis5595_read_value(data, SIS5595_REG_FAN(i));
 729                         data->fan_min[i] =
 730                             sis5595_read_value(data,
 731                                                SIS5595_REG_FAN_MIN(i));
 732                 }
 733                 if (data->maxins == 3) {
 734                         data->temp =
 735                             sis5595_read_value(data, SIS5595_REG_TEMP);
 736                         data->temp_over =
 737                             sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
 738                         data->temp_hyst =
 739                             sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
 740                 }
 741                 i = sis5595_read_value(data, SIS5595_REG_FANDIV);
 742                 data->fan_div[0] = (i >> 4) & 0x03;
 743                 data->fan_div[1] = i >> 6;
 744                 data->alarms =
 745                     sis5595_read_value(data, SIS5595_REG_ALARM1) |
 746                     (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
 747                 data->last_updated = jiffies;
 748                 data->valid = 1;
 749         }
 750
 751         mutex_unlock(&data->update_lock);
 752
 753         return data;
 754 }
 755
 756 static const struct pci_device_id sis5595_pci_ids[] = {
 757         { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
 758         { 0, }
 759 };
 760
 761 MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
 762
 763 static int blacklist[] = {
 764         PCI_DEVICE_ID_SI_540,
 765         PCI_DEVICE_ID_SI_550,
 766         PCI_DEVICE_ID_SI_630,
 767         PCI_DEVICE_ID_SI_645,
 768         PCI_DEVICE_ID_SI_730,
 769         PCI_DEVICE_ID_SI_735,
 770         PCI_DEVICE_ID_SI_5511, /*
 771                                 * 5513 chip has the 0008 device but
 772                                 * that ID shows up in other chips so we
 773                                 * use the 5511 ID for recognition
 774                                 */
 775         PCI_DEVICE_ID_SI_5597,
 776         PCI_DEVICE_ID_SI_5598,
 777         0 };
 778
 779 static int sis5595_device_add(unsigned short address)
 780 {
 781         struct resource res = {
 782                 .start  = address,
 783                 .end    = address + SIS5595_EXTENT - 1,
 784                 .name   = "sis5595",
 785                 .flags  = IORESOURCE_IO,
 786         };
 787         int err;
 788
 789         err = acpi_check_resource_conflict(&res);
 790         if (err)
 791                 goto exit;
 792
 793         pdev = platform_device_alloc("sis5595", address);
 794         if (!pdev) {
 795                 err = -ENOMEM;
 796                 pr_err("Device allocation failed\n");
 797                 goto exit;
 798         }
 799
 800         err = platform_device_add_resources(pdev, &res, 1);
 801         if (err) {
 802                 pr_err("Device resource addition failed (%d)\n", err);
 803                 goto exit_device_put;
 804         }
 805
 806         err = platform_device_add(pdev);
 807         if (err) {
 808                 pr_err("Device addition failed (%d)\n", err);
 809                 goto exit_device_put;
 810         }
 811
 812         return 0;
 813
 814 exit_device_put:
 815         platform_device_put(pdev);
 816 exit:
 817         return err;
 818 }
 819
 820 static int sis5595_pci_probe(struct pci_dev *dev,
 821                                        const struct pci_device_id *id)
 822 {
 823         u16 address;
 824         u8 enable;
 825         int *i;
 826
 827         for (i = blacklist; *i != 0; i++) {
 828                 struct pci_dev *d;
 829                 d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
 830                 if (d) {
 831                         dev_err(&d->dev,
 832                                 "Looked for SIS5595 but found unsupported device %.4x\n",
 833                                 *i);
 834                         pci_dev_put(d);
 835                         return -ENODEV;
 836                 }
 837         }
 838
 839         force_addr &= ~(SIS5595_EXTENT - 1);
 840         if (force_addr) {
 841                 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
 842                 pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
 843         }
 844
 845         if (PCIBIOS_SUCCESSFUL !=
 846             pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
 847                 dev_err(&dev->dev, "Failed to read ISA address\n");
 848                 return -ENODEV;
 849         }
 850
 851         address &= ~(SIS5595_EXTENT - 1);
 852         if (!address) {
 853                 dev_err(&dev->dev,
 854                         "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
 855                 return -ENODEV;
 856         }
 857         if (force_addr && address != force_addr) {
 858                 /* doesn't work for some chips? */
 859                 dev_err(&dev->dev, "Failed to force ISA address\n");
 860                 return -ENODEV;
 861         }
 862
 863         if (PCIBIOS_SUCCESSFUL !=
 864             pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
 865                 dev_err(&dev->dev, "Failed to read enable register\n");
 866                 return -ENODEV;
 867         }
 868         if (!(enable & 0x80)) {
 869                 if ((PCIBIOS_SUCCESSFUL !=
 870                      pci_write_config_byte(dev, SIS5595_ENABLE_REG,
 871                                            enable | 0x80))
 872                  || (PCIBIOS_SUCCESSFUL !=
 873                      pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
 874                  || (!(enable & 0x80))) {
 875                         /* doesn't work for some chips! */
 876                         dev_err(&dev->dev, "Failed to enable HWM device\n");
 877                         return -ENODEV;
 878                 }
 879         }
 880
 881         if (platform_driver_register(&sis5595_driver)) {
 882                 dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
 883                 goto exit;
 884         }
 885
 886         s_bridge = pci_dev_get(dev);
 887         /* Sets global pdev as a side effect */
 888         if (sis5595_device_add(address))
 889                 goto exit_unregister;
 890
 891         /*
 892          * Always return failure here.  This is to allow other drivers to bind
 893          * to this pci device.  We don't really want to have control over the
 894          * pci device, we only wanted to read as few register values from it.
 895          */
 896         return -ENODEV;
 897
 898 exit_unregister:
 899         pci_dev_put(dev);
 900         platform_driver_unregister(&sis5595_driver);
 901 exit:
 902         return -ENODEV;
 903 }
 904
 905 static struct pci_driver sis5595_pci_driver = {
 906         .name            = "sis5595",
 907         .id_table        = sis5595_pci_ids,
 908         .probe           = sis5595_pci_probe,
 909 };
 910
 911 static int __init sm_sis5595_init(void)
 912 {
 913         return pci_register_driver(&sis5595_pci_driver);
 914 }
 915
 916 static void __exit sm_sis5595_exit(void)
 917 {
 918         pci_unregister_driver(&sis5595_pci_driver);
 919         if (s_bridge != NULL) {
 920                 platform_device_unregister(pdev);
 921                 platform_driver_unregister(&sis5595_driver);
 922                 pci_dev_put(s_bridge);
 923                 s_bridge = NULL;
 924         }
 925 }
 926
 927 MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
 928 MODULE_DESCRIPTION("SiS 5595 Sensor device");
 929 MODULE_LICENSE("GPL");
 930
 931 module_init(sm_sis5595_init);
 932 module_exit(sm_sis5595_exit);