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 = clamp_val(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 clamp_val((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 = clamp_val(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,
 460                        "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
 461                        val);
 462                mutex_unlock(&data->update_lock);
 463                return -EINVAL;
 464        }
 465
 466        switch (nr) {
 467        case 0:
 468                reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
 469                break;
 470        case 1:
 471                reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
 472                break;
 473        }
 474        sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
 475        data->fan_min[nr] =
 476                FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 477        sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
 478        mutex_unlock(&data->update_lock);
 479        return count;
 480}
 481
 482#define show_fan_offset(offset)                                         \
 483static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
 484                show_fan, NULL, offset - 1);                            \
 485static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
 486                show_fan_min, set_fan_min, offset - 1);                 \
 487static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,         \
 488                show_fan_div, set_fan_div, offset - 1);
 489
 490show_fan_offset(1);
 491show_fan_offset(2);
 492
 493/* Alarms */
 494static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
 495                           char *buf)
 496{
 497        struct sis5595_data *data = sis5595_update_device(dev);
 498        return sprintf(buf, "%d\n", data->alarms);
 499}
 500static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 501
 502static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
 503                          char *buf)
 504{
 505        struct sis5595_data *data = sis5595_update_device(dev);
 506        int nr = to_sensor_dev_attr(da)->index;
 507        return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
 508}
 509static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 510static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 511static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 512static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 513static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15);
 514static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
 515static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
 516static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15);
 517
 518static ssize_t show_name(struct device *dev, struct device_attribute *attr,
 519                         char *buf)
 520{
 521        struct sis5595_data *data = dev_get_drvdata(dev);
 522        return sprintf(buf, "%s\n", data->name);
 523}
 524static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 525
 526static struct attribute *sis5595_attributes[] = {
 527        &sensor_dev_attr_in0_input.dev_attr.attr,
 528        &sensor_dev_attr_in0_min.dev_attr.attr,
 529        &sensor_dev_attr_in0_max.dev_attr.attr,
 530        &sensor_dev_attr_in0_alarm.dev_attr.attr,
 531        &sensor_dev_attr_in1_input.dev_attr.attr,
 532        &sensor_dev_attr_in1_min.dev_attr.attr,
 533        &sensor_dev_attr_in1_max.dev_attr.attr,
 534        &sensor_dev_attr_in1_alarm.dev_attr.attr,
 535        &sensor_dev_attr_in2_input.dev_attr.attr,
 536        &sensor_dev_attr_in2_min.dev_attr.attr,
 537        &sensor_dev_attr_in2_max.dev_attr.attr,
 538        &sensor_dev_attr_in2_alarm.dev_attr.attr,
 539        &sensor_dev_attr_in3_input.dev_attr.attr,
 540        &sensor_dev_attr_in3_min.dev_attr.attr,
 541        &sensor_dev_attr_in3_max.dev_attr.attr,
 542        &sensor_dev_attr_in3_alarm.dev_attr.attr,
 543
 544        &sensor_dev_attr_fan1_input.dev_attr.attr,
 545        &sensor_dev_attr_fan1_min.dev_attr.attr,
 546        &sensor_dev_attr_fan1_div.dev_attr.attr,
 547        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 548        &sensor_dev_attr_fan2_input.dev_attr.attr,
 549        &sensor_dev_attr_fan2_min.dev_attr.attr,
 550        &sensor_dev_attr_fan2_div.dev_attr.attr,
 551        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 552
 553        &dev_attr_alarms.attr,
 554        &dev_attr_name.attr,
 555        NULL
 556};
 557
 558static const struct attribute_group sis5595_group = {
 559        .attrs = sis5595_attributes,
 560};
 561
 562static struct attribute *sis5595_attributes_in4[] = {
 563        &sensor_dev_attr_in4_input.dev_attr.attr,
 564        &sensor_dev_attr_in4_min.dev_attr.attr,
 565        &sensor_dev_attr_in4_max.dev_attr.attr,
 566        &sensor_dev_attr_in4_alarm.dev_attr.attr,
 567        NULL
 568};
 569
 570static const struct attribute_group sis5595_group_in4 = {
 571        .attrs = sis5595_attributes_in4,
 572};
 573
 574static struct attribute *sis5595_attributes_temp1[] = {
 575        &dev_attr_temp1_input.attr,
 576        &dev_attr_temp1_max.attr,
 577        &dev_attr_temp1_max_hyst.attr,
 578        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 579        NULL
 580};
 581
 582static const struct attribute_group sis5595_group_temp1 = {
 583        .attrs = sis5595_attributes_temp1,
 584};
 585
 586/* This is called when the module is loaded */
 587static int sis5595_probe(struct platform_device *pdev)
 588{
 589        int err = 0;
 590        int i;
 591        struct sis5595_data *data;
 592        struct resource *res;
 593        char val;
 594
 595        /* Reserve the ISA region */
 596        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 597        if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
 598                                 sis5595_driver.driver.name))
 599                return -EBUSY;
 600
 601        data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
 602                            GFP_KERNEL);
 603        if (!data)
 604                return -ENOMEM;
 605
 606        mutex_init(&data->lock);
 607        mutex_init(&data->update_lock);
 608        data->addr = res->start;
 609        data->name = "sis5595";
 610        platform_set_drvdata(pdev, data);
 611
 612        /*
 613         * Check revision and pin registers to determine whether 4 or 5 voltages
 614         */
 615        data->revision = s_bridge->revision;
 616        /* 4 voltages, 1 temp */
 617        data->maxins = 3;
 618        if (data->revision >= REV2MIN) {
 619                pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
 620                if (!(val & 0x80))
 621                        /* 5 voltages, no temps */
 622                        data->maxins = 4;
 623        }
 624
 625        /* Initialize the SIS5595 chip */
 626        sis5595_init_device(data);
 627
 628        /* A few vars need to be filled upon startup */
 629        for (i = 0; i < 2; i++) {
 630                data->fan_min[i] = sis5595_read_value(data,
 631                                        SIS5595_REG_FAN_MIN(i));
 632        }
 633
 634        /* Register sysfs hooks */
 635        err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
 636        if (err)
 637                return err;
 638        if (data->maxins == 4) {
 639                err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
 640                if (err)
 641                        goto exit_remove_files;
 642        } else {
 643                err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
 644                if (err)
 645                        goto exit_remove_files;
 646        }
 647
 648        data->hwmon_dev = hwmon_device_register(&pdev->dev);
 649        if (IS_ERR(data->hwmon_dev)) {
 650                err = PTR_ERR(data->hwmon_dev);
 651                goto exit_remove_files;
 652        }
 653
 654        return 0;
 655
 656exit_remove_files:
 657        sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 658        sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 659        sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 660        return err;
 661}
 662
 663static int sis5595_remove(struct platform_device *pdev)
 664{
 665        struct sis5595_data *data = platform_get_drvdata(pdev);
 666
 667        hwmon_device_unregister(data->hwmon_dev);
 668        sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
 669        sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
 670        sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
 671
 672        return 0;
 673}
 674
 675
 676/* ISA access must be locked explicitly. */
 677static int sis5595_read_value(struct sis5595_data *data, u8 reg)
 678{
 679        int res;
 680
 681        mutex_lock(&data->lock);
 682        outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 683        res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
 684        mutex_unlock(&data->lock);
 685        return res;
 686}
 687
 688static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
 689{
 690        mutex_lock(&data->lock);
 691        outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
 692        outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
 693        mutex_unlock(&data->lock);
 694}
 695
 696/* Called when we have found a new SIS5595. */
 697static void sis5595_init_device(struct sis5595_data *data)
 698{
 699        u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
 700        if (!(config & 0x01))
 701                sis5595_write_value(data, SIS5595_REG_CONFIG,
 702                                (config & 0xf7) | 0x01);
 703}
 704
 705static struct sis5595_data *sis5595_update_device(struct device *dev)
 706{
 707        struct sis5595_data *data = dev_get_drvdata(dev);
 708        int i;
 709
 710        mutex_lock(&data->update_lock);
 711
 712        if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 713            || !data->valid) {
 714
 715                for (i = 0; i <= data->maxins; i++) {
 716                        data->in[i] =
 717                            sis5595_read_value(data, SIS5595_REG_IN(i));
 718                        data->in_min[i] =
 719                            sis5595_read_value(data,
 720                                               SIS5595_REG_IN_MIN(i));
 721                        data->in_max[i] =
 722                            sis5595_read_value(data,
 723                                               SIS5595_REG_IN_MAX(i));
 724                }
 725                for (i = 0; i < 2; i++) {
 726                        data->fan[i] =
 727                            sis5595_read_value(data, SIS5595_REG_FAN(i));
 728                        data->fan_min[i] =
 729                            sis5595_read_value(data,
 730                                               SIS5595_REG_FAN_MIN(i));
 731                }
 732                if (data->maxins == 3) {
 733                        data->temp =
 734                            sis5595_read_value(data, SIS5595_REG_TEMP);
 735                        data->temp_over =
 736                            sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
 737                        data->temp_hyst =
 738                            sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
 739                }
 740                i = sis5595_read_value(data, SIS5595_REG_FANDIV);
 741                data->fan_div[0] = (i >> 4) & 0x03;
 742                data->fan_div[1] = i >> 6;
 743                data->alarms =
 744                    sis5595_read_value(data, SIS5595_REG_ALARM1) |
 745                    (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
 746                data->last_updated = jiffies;
 747                data->valid = 1;
 748        }
 749
 750        mutex_unlock(&data->update_lock);
 751
 752        return data;
 753}
 754
 755static DEFINE_PCI_DEVICE_TABLE(sis5595_pci_ids) = {
 756        { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
 757        { 0, }
 758};
 759
 760MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
 761
 762static int blacklist[] = {
 763        PCI_DEVICE_ID_SI_540,
 764        PCI_DEVICE_ID_SI_550,
 765        PCI_DEVICE_ID_SI_630,
 766        PCI_DEVICE_ID_SI_645,
 767        PCI_DEVICE_ID_SI_730,
 768        PCI_DEVICE_ID_SI_735,
 769        PCI_DEVICE_ID_SI_5511, /*
 770                                * 5513 chip has the 0008 device but
 771                                * that ID shows up in other chips so we
 772                                * use the 5511 ID for recognition
 773                                */
 774        PCI_DEVICE_ID_SI_5597,
 775        PCI_DEVICE_ID_SI_5598,
 776        0 };
 777
 778static int sis5595_device_add(unsigned short address)
 779{
 780        struct resource res = {
 781                .start  = address,
 782                .end    = address + SIS5595_EXTENT - 1,
 783                .name   = "sis5595",
 784                .flags  = IORESOURCE_IO,
 785        };
 786        int err;
 787
 788        err = acpi_check_resource_conflict(&res);
 789        if (err)
 790                goto exit;
 791
 792        pdev = platform_device_alloc("sis5595", address);
 793        if (!pdev) {
 794                err = -ENOMEM;
 795                pr_err("Device allocation failed\n");
 796                goto exit;
 797        }
 798
 799        err = platform_device_add_resources(pdev, &res, 1);
 800        if (err) {
 801                pr_err("Device resource addition failed (%d)\n", err);
 802                goto exit_device_put;
 803        }
 804
 805        err = platform_device_add(pdev);
 806        if (err) {
 807                pr_err("Device addition failed (%d)\n", err);
 808                goto exit_device_put;
 809        }
 810
 811        return 0;
 812
 813exit_device_put:
 814        platform_device_put(pdev);
 815exit:
 816        return err;
 817}
 818
 819static int sis5595_pci_probe(struct pci_dev *dev,
 820                                       const struct pci_device_id *id)
 821{
 822        u16 address;
 823        u8 enable;
 824        int *i;
 825
 826        for (i = blacklist; *i != 0; i++) {
 827                struct pci_dev *d;
 828                d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
 829                if (d) {
 830                        dev_err(&d->dev,
 831                                "Looked for SIS5595 but found unsupported device %.4x\n",
 832                                *i);
 833                        pci_dev_put(d);
 834                        return -ENODEV;
 835                }
 836        }
 837
 838        force_addr &= ~(SIS5595_EXTENT - 1);
 839        if (force_addr) {
 840                dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
 841                pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
 842        }
 843
 844        if (PCIBIOS_SUCCESSFUL !=
 845            pci_read_config_word(dev, SIS5595_BASE_REG, &address)) {
 846                dev_err(&dev->dev, "Failed to read ISA address\n");
 847                return -ENODEV;
 848        }
 849
 850        address &= ~(SIS5595_EXTENT - 1);
 851        if (!address) {
 852                dev_err(&dev->dev,
 853                        "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
 854                return -ENODEV;
 855        }
 856        if (force_addr && address != force_addr) {
 857                /* doesn't work for some chips? */
 858                dev_err(&dev->dev, "Failed to force ISA address\n");
 859                return -ENODEV;
 860        }
 861
 862        if (PCIBIOS_SUCCESSFUL !=
 863            pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) {
 864                dev_err(&dev->dev, "Failed to read enable register\n");
 865                return -ENODEV;
 866        }
 867        if (!(enable & 0x80)) {
 868                if ((PCIBIOS_SUCCESSFUL !=
 869                     pci_write_config_byte(dev, SIS5595_ENABLE_REG,
 870                                           enable | 0x80))
 871                 || (PCIBIOS_SUCCESSFUL !=
 872                     pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable))
 873                 || (!(enable & 0x80))) {
 874                        /* doesn't work for some chips! */
 875                        dev_err(&dev->dev, "Failed to enable HWM device\n");
 876                        return -ENODEV;
 877                }
 878        }
 879
 880        if (platform_driver_register(&sis5595_driver)) {
 881                dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
 882                goto exit;
 883        }
 884
 885        s_bridge = pci_dev_get(dev);
 886        /* Sets global pdev as a side effect */
 887        if (sis5595_device_add(address))
 888                goto exit_unregister;
 889
 890        /*
 891         * Always return failure here.  This is to allow other drivers to bind
 892         * to this pci device.  We don't really want to have control over the
 893         * pci device, we only wanted to read as few register values from it.
 894         */
 895        return -ENODEV;
 896
 897exit_unregister:
 898        pci_dev_put(dev);
 899        platform_driver_unregister(&sis5595_driver);
 900exit:
 901        return -ENODEV;
 902}
 903
 904static struct pci_driver sis5595_pci_driver = {
 905        .name            = "sis5595",
 906        .id_table        = sis5595_pci_ids,
 907        .probe           = sis5595_pci_probe,
 908};
 909
 910static int __init sm_sis5595_init(void)
 911{
 912        return pci_register_driver(&sis5595_pci_driver);
 913}
 914
 915static void __exit sm_sis5595_exit(void)
 916{
 917        pci_unregister_driver(&sis5595_pci_driver);
 918        if (s_bridge != NULL) {
 919                platform_device_unregister(pdev);
 920                platform_driver_unregister(&sis5595_driver);
 921                pci_dev_put(s_bridge);
 922                s_bridge = NULL;
 923        }
 924}
 925
 926MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
 927MODULE_DESCRIPTION("SiS 5595 Sensor device");
 928MODULE_LICENSE("GPL");
 929
 930module_init(sm_sis5595_init);
 931module_exit(sm_sis5595_exit);
 932
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