linux/drivers/hwmon/sis5595.c
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   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 */
  75static u16 force_addr;
  76module_param(force_addr, ushort, 0);
  77MODULE_PARM_DESC(force_addr,
  78                 "Initialize the base address of the sensors");
  79
  80static 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 */
 133static 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
 140static 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
 147static 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 */
 156static inline int TEMP_FROM_REG(s8 val)
 157{
 158        return val * 830 + 52120;
 159}
 160static 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 */
 170static 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 */
 180struct 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
 204static struct pci_dev *s_bridge;        /* pointer to the (only) sis5595 */
 205
 206static int sis5595_probe(struct platform_device *pdev);
 207static int sis5595_remove(struct platform_device *pdev);
 208
 209static int sis5595_read_value(struct sis5595_data *data, u8 reg);
 210static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value);
 211static struct sis5595_data *sis5595_update_device(struct device *dev);
 212static void sis5595_init_device(struct sis5595_data *data);
 213
 214static struct platform_driver sis5595_driver = {
 215        .driver = {
 216                .owner  = THIS_MODULE,
 217                .name   = "sis5595",
 218        },
 219        .probe          = sis5595_probe,
 220        .remove         = sis5595_remove,
 221};
 222
 223/* 4 Voltages */
 224static 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
 233static 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
 242static 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
 251static 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
 271static 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)                                  \
 292static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
 293                show_in, NULL, offset);                         \
 294static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
 295                show_in_min, set_in_min, offset);               \
 296static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
 297                show_in_max, set_in_max, offset);
 298
 299show_in_offset(0);
 300show_in_offset(1);
 301show_in_offset(2);
 302show_in_offset(3);
 303show_in_offset(4);
 304
 305/* Temperature */
 306static 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
 313static 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
 320static 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
 338static 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
 345static 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
 363static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
 364static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 365                show_temp_over, set_temp_over);
 366static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 367                show_temp_hyst, set_temp_hyst);
 368
 369/* 2 Fans */
 370static 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
 380static 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
 390static 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
 410static 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 */
 425static 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)                                         \
 482static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
 483                show_fan, NULL, offset - 1);                            \
 484static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
 485                show_fan_min, set_fan_min, offset - 1);                 \
 486static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,         \
 487                show_fan_div, set_fan_div, offset - 1);
 488
 489show_fan_offset(1);
 490show_fan_offset(2);
 491
 492/* Alarms */
 493static 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}
 499static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 500
 501static 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}
 508static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 509static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 510static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 511static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 512static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
 513static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 514static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 515static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
 516
 517static 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}
 523static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 524
 525static 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
 557static const struct attribute_group sis5595_group = {
 558        .attrs = sis5595_attributes,
 559};
 560
 561static 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
 569static const struct attribute_group sis5595_group_in4 = {
 570        .attrs = sis5595_attributes_in4,
 571};
 572
 573static 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
 581static const struct attribute_group sis5595_group_temp1 = {
 582        .attrs = sis5595_attributes_temp1,
 583};
 584
 585/* This is called when the module is loaded */
 586static int 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
 655exit_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
 662static int 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. */
 676static 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
 687static 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. */
 696static void 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
 704static 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
 754static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = {
 755        { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
 756        { 0, }
 757};
 758
 759MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
 760
 761static int blacklist[] = {
 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
 777static int 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
 812exit_device_put:
 813        platform_device_put(pdev);
 814exit:
 815        return err;
 816}
 817
 818static int 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
 896exit_unregister:
 897        pci_dev_put(dev);
 898        platform_driver_unregister(&sis5595_driver);
 899exit:
 900        return -ENODEV;
 901}
 902
 903static struct pci_driver sis5595_pci_driver = {
 904        .name            = "sis5595",
 905        .id_table        = sis5595_pci_ids,
 906        .probe           = sis5595_pci_probe,
 907};
 908
 909static int __init sm_sis5595_init(void)
 910{
 911        return pci_register_driver(&sis5595_pci_driver);
 912}
 913
 914static 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
 925MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
 926MODULE_DESCRIPTION("SiS 5595 Sensor device");
 927MODULE_LICENSE("GPL");
 928
 929module_init(sm_sis5595_init);
 930module_exit(sm_sis5595_exit);
 931
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