linux/drivers/hwmon/dme1737.c
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   1/*
   2 * dme1737.c - Driver for the SMSC DME1737, Asus A8000, SMSC SCH311x, SCH5027,
   3 *             and SCH5127 Super-I/O chips integrated hardware monitoring
   4 *             features.
   5 * Copyright (c) 2007, 2008, 2009, 2010 Juerg Haefliger <juergh@gmail.com>
   6 *
   7 * This driver is an I2C/ISA hybrid, meaning that it uses the I2C bus to access
   8 * the chip registers if a DME1737, A8000, or SCH5027 is found and the ISA bus
   9 * if a SCH311x or SCH5127 chip is found. Both types of chips have very
  10 * similar hardware monitoring capabilities but differ in the way they can be
  11 * accessed.
  12 *
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation; either version 2 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program; if not, write to the Free Software
  25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26 */
  27
  28#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29
  30#include <linux/module.h>
  31#include <linux/init.h>
  32#include <linux/slab.h>
  33#include <linux/jiffies.h>
  34#include <linux/i2c.h>
  35#include <linux/platform_device.h>
  36#include <linux/hwmon.h>
  37#include <linux/hwmon-sysfs.h>
  38#include <linux/hwmon-vid.h>
  39#include <linux/err.h>
  40#include <linux/mutex.h>
  41#include <linux/acpi.h>
  42#include <linux/io.h>
  43
  44/* ISA device, if found */
  45static struct platform_device *pdev;
  46
  47/* Module load parameters */
  48static bool force_start;
  49module_param(force_start, bool, 0);
  50MODULE_PARM_DESC(force_start, "Force the chip to start monitoring inputs");
  51
  52static unsigned short force_id;
  53module_param(force_id, ushort, 0);
  54MODULE_PARM_DESC(force_id, "Override the detected device ID");
  55
  56static bool probe_all_addr;
  57module_param(probe_all_addr, bool, 0);
  58MODULE_PARM_DESC(probe_all_addr,
  59                 "Include probing of non-standard LPC addresses");
  60
  61/* Addresses to scan */
  62static const unsigned short normal_i2c[] = {0x2c, 0x2d, 0x2e, I2C_CLIENT_END};
  63
  64enum chips { dme1737, sch5027, sch311x, sch5127 };
  65
  66#define DO_REPORT "Please report to the driver maintainer."
  67
  68/* ---------------------------------------------------------------------
  69 * Registers
  70 *
  71 * The sensors are defined as follows:
  72 *
  73 * Voltages                          Temperatures
  74 * --------                          ------------
  75 * in0   +5VTR (+5V stdby)           temp1   Remote diode 1
  76 * in1   Vccp  (proc core)           temp2   Internal temp
  77 * in2   VCC   (internal +3.3V)      temp3   Remote diode 2
  78 * in3   +5V
  79 * in4   +12V
  80 * in5   VTR   (+3.3V stby)
  81 * in6   Vbat
  82 * in7   Vtrip (sch5127 only)
  83 *
  84 * --------------------------------------------------------------------- */
  85
  86/* Voltages (in) numbered 0-7 (ix) */
  87#define DME1737_REG_IN(ix)              ((ix) < 5 ? 0x20 + (ix) : \
  88                                         (ix) < 7 ? 0x94 + (ix) : \
  89                                                    0x1f)
  90#define DME1737_REG_IN_MIN(ix)          ((ix) < 5 ? 0x44 + (ix) * 2 \
  91                                                  : 0x91 + (ix) * 2)
  92#define DME1737_REG_IN_MAX(ix)          ((ix) < 5 ? 0x45 + (ix) * 2 \
  93                                                  : 0x92 + (ix) * 2)
  94
  95/* Temperatures (temp) numbered 0-2 (ix) */
  96#define DME1737_REG_TEMP(ix)            (0x25 + (ix))
  97#define DME1737_REG_TEMP_MIN(ix)        (0x4e + (ix) * 2)
  98#define DME1737_REG_TEMP_MAX(ix)        (0x4f + (ix) * 2)
  99#define DME1737_REG_TEMP_OFFSET(ix)     ((ix) == 0 ? 0x1f \
 100                                                   : 0x1c + (ix))
 101
 102/*
 103 * Voltage and temperature LSBs
 104 * The LSBs (4 bits each) are stored in 5 registers with the following layouts:
 105 *    IN_TEMP_LSB(0) = [in5, in6]
 106 *    IN_TEMP_LSB(1) = [temp3, temp1]
 107 *    IN_TEMP_LSB(2) = [in4, temp2]
 108 *    IN_TEMP_LSB(3) = [in3, in0]
 109 *    IN_TEMP_LSB(4) = [in2, in1]
 110 *    IN_TEMP_LSB(5) = [res, in7]
 111 */
 112#define DME1737_REG_IN_TEMP_LSB(ix)     (0x84 + (ix))
 113static const u8 DME1737_REG_IN_LSB[] = {3, 4, 4, 3, 2, 0, 0, 5};
 114static const u8 DME1737_REG_IN_LSB_SHL[] = {4, 4, 0, 0, 0, 0, 4, 4};
 115static const u8 DME1737_REG_TEMP_LSB[] = {1, 2, 1};
 116static const u8 DME1737_REG_TEMP_LSB_SHL[] = {4, 4, 0};
 117
 118/* Fans numbered 0-5 (ix) */
 119#define DME1737_REG_FAN(ix)             ((ix) < 4 ? 0x28 + (ix) * 2 \
 120                                                  : 0xa1 + (ix) * 2)
 121#define DME1737_REG_FAN_MIN(ix)         ((ix) < 4 ? 0x54 + (ix) * 2 \
 122                                                  : 0xa5 + (ix) * 2)
 123#define DME1737_REG_FAN_OPT(ix)         ((ix) < 4 ? 0x90 + (ix) \
 124                                                  : 0xb2 + (ix))
 125#define DME1737_REG_FAN_MAX(ix)         (0xb4 + (ix)) /* only for fan[4-5] */
 126
 127/* PWMs numbered 0-2, 4-5 (ix) */
 128#define DME1737_REG_PWM(ix)             ((ix) < 3 ? 0x30 + (ix) \
 129                                                  : 0xa1 + (ix))
 130#define DME1737_REG_PWM_CONFIG(ix)      (0x5c + (ix)) /* only for pwm[0-2] */
 131#define DME1737_REG_PWM_MIN(ix)         (0x64 + (ix)) /* only for pwm[0-2] */
 132#define DME1737_REG_PWM_FREQ(ix)        ((ix) < 3 ? 0x5f + (ix) \
 133                                                  : 0xa3 + (ix))
 134/*
 135 * The layout of the ramp rate registers is different from the other pwm
 136 * registers. The bits for the 3 PWMs are stored in 2 registers:
 137 *    PWM_RR(0) = [OFF3, OFF2,  OFF1,  RES,   RR1E, RR1-2, RR1-1, RR1-0]
 138 *    PWM_RR(1) = [RR2E, RR2-2, RR2-1, RR2-0, RR3E, RR3-2, RR3-1, RR3-0]
 139 */
 140#define DME1737_REG_PWM_RR(ix)          (0x62 + (ix)) /* only for pwm[0-2] */
 141
 142/* Thermal zones 0-2 */
 143#define DME1737_REG_ZONE_LOW(ix)        (0x67 + (ix))
 144#define DME1737_REG_ZONE_ABS(ix)        (0x6a + (ix))
 145/*
 146 * The layout of the hysteresis registers is different from the other zone
 147 * registers. The bits for the 3 zones are stored in 2 registers:
 148 *    ZONE_HYST(0) = [H1-3,  H1-2,  H1-1, H1-0, H2-3, H2-2, H2-1, H2-0]
 149 *    ZONE_HYST(1) = [H3-3,  H3-2,  H3-1, H3-0, RES,  RES,  RES,  RES]
 150 */
 151#define DME1737_REG_ZONE_HYST(ix)       (0x6d + (ix))
 152
 153/*
 154 * Alarm registers and bit mapping
 155 * The 3 8-bit alarm registers will be concatenated to a single 32-bit
 156 * alarm value [0, ALARM3, ALARM2, ALARM1].
 157 */
 158#define DME1737_REG_ALARM1              0x41
 159#define DME1737_REG_ALARM2              0x42
 160#define DME1737_REG_ALARM3              0x83
 161static const u8 DME1737_BIT_ALARM_IN[] = {0, 1, 2, 3, 8, 16, 17, 18};
 162static const u8 DME1737_BIT_ALARM_TEMP[] = {4, 5, 6};
 163static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23};
 164
 165/* Miscellaneous registers */
 166#define DME1737_REG_DEVICE              0x3d
 167#define DME1737_REG_COMPANY             0x3e
 168#define DME1737_REG_VERSTEP             0x3f
 169#define DME1737_REG_CONFIG              0x40
 170#define DME1737_REG_CONFIG2             0x7f
 171#define DME1737_REG_VID                 0x43
 172#define DME1737_REG_TACH_PWM            0x81
 173
 174/* ---------------------------------------------------------------------
 175 * Misc defines
 176 * --------------------------------------------------------------------- */
 177
 178/* Chip identification */
 179#define DME1737_COMPANY_SMSC    0x5c
 180#define DME1737_VERSTEP         0x88
 181#define DME1737_VERSTEP_MASK    0xf8
 182#define SCH311X_DEVICE          0x8c
 183#define SCH5027_VERSTEP         0x69
 184#define SCH5127_DEVICE          0x8e
 185
 186/* Device ID values (global configuration register index 0x20) */
 187#define DME1737_ID_1    0x77
 188#define DME1737_ID_2    0x78
 189#define SCH3112_ID      0x7c
 190#define SCH3114_ID      0x7d
 191#define SCH3116_ID      0x7f
 192#define SCH5027_ID      0x89
 193#define SCH5127_ID      0x86
 194
 195/* Length of ISA address segment */
 196#define DME1737_EXTENT  2
 197
 198/* chip-dependent features */
 199#define HAS_TEMP_OFFSET         (1 << 0)                /* bit 0 */
 200#define HAS_VID                 (1 << 1)                /* bit 1 */
 201#define HAS_ZONE3               (1 << 2)                /* bit 2 */
 202#define HAS_ZONE_HYST           (1 << 3)                /* bit 3 */
 203#define HAS_PWM_MIN             (1 << 4)                /* bit 4 */
 204#define HAS_FAN(ix)             (1 << ((ix) + 5))       /* bits 5-10 */
 205#define HAS_PWM(ix)             (1 << ((ix) + 11))      /* bits 11-16 */
 206#define HAS_IN7                 (1 << 17)               /* bit 17 */
 207
 208/* ---------------------------------------------------------------------
 209 * Data structures and manipulation thereof
 210 * --------------------------------------------------------------------- */
 211
 212struct dme1737_data {
 213        struct i2c_client *client;      /* for I2C devices only */
 214        struct device *hwmon_dev;
 215        const char *name;
 216        unsigned int addr;              /* for ISA devices only */
 217
 218        struct mutex update_lock;
 219        int valid;                      /* !=0 if following fields are valid */
 220        unsigned long last_update;      /* in jiffies */
 221        unsigned long last_vbat;        /* in jiffies */
 222        enum chips type;
 223        const int *in_nominal;          /* pointer to IN_NOMINAL array */
 224
 225        u8 vid;
 226        u8 pwm_rr_en;
 227        u32 has_features;
 228
 229        /* Register values */
 230        u16 in[8];
 231        u8  in_min[8];
 232        u8  in_max[8];
 233        s16 temp[3];
 234        s8  temp_min[3];
 235        s8  temp_max[3];
 236        s8  temp_offset[3];
 237        u8  config;
 238        u8  config2;
 239        u8  vrm;
 240        u16 fan[6];
 241        u16 fan_min[6];
 242        u8  fan_max[2];
 243        u8  fan_opt[6];
 244        u8  pwm[6];
 245        u8  pwm_min[3];
 246        u8  pwm_config[3];
 247        u8  pwm_acz[3];
 248        u8  pwm_freq[6];
 249        u8  pwm_rr[2];
 250        s8  zone_low[3];
 251        s8  zone_abs[3];
 252        u8  zone_hyst[2];
 253        u32 alarms;
 254};
 255
 256/* Nominal voltage values */
 257static const int IN_NOMINAL_DME1737[] = {5000, 2250, 3300, 5000, 12000, 3300,
 258                                         3300};
 259static const int IN_NOMINAL_SCH311x[] = {2500, 1500, 3300, 5000, 12000, 3300,
 260                                         3300};
 261static const int IN_NOMINAL_SCH5027[] = {5000, 2250, 3300, 1125, 1125, 3300,
 262                                         3300};
 263static const int IN_NOMINAL_SCH5127[] = {2500, 2250, 3300, 1125, 1125, 3300,
 264                                         3300, 1500};
 265#define IN_NOMINAL(type)        ((type) == sch311x ? IN_NOMINAL_SCH311x : \
 266                                 (type) == sch5027 ? IN_NOMINAL_SCH5027 : \
 267                                 (type) == sch5127 ? IN_NOMINAL_SCH5127 : \
 268                                 IN_NOMINAL_DME1737)
 269
 270/*
 271 * Voltage input
 272 * Voltage inputs have 16 bits resolution, limit values have 8 bits
 273 * resolution.
 274 */
 275static inline int IN_FROM_REG(int reg, int nominal, int res)
 276{
 277        return (reg * nominal + (3 << (res - 3))) / (3 << (res - 2));
 278}
 279
 280static inline int IN_TO_REG(long val, int nominal)
 281{
 282        val = clamp_val(val, 0, 255 * nominal / 192);
 283        return DIV_ROUND_CLOSEST(val * 192, nominal);
 284}
 285
 286/*
 287 * Temperature input
 288 * The register values represent temperatures in 2's complement notation from
 289 * -127 degrees C to +127 degrees C. Temp inputs have 16 bits resolution, limit
 290 * values have 8 bits resolution.
 291 */
 292static inline int TEMP_FROM_REG(int reg, int res)
 293{
 294        return (reg * 1000) >> (res - 8);
 295}
 296
 297static inline int TEMP_TO_REG(long val)
 298{
 299        val = clamp_val(val, -128000, 127000);
 300        return DIV_ROUND_CLOSEST(val, 1000);
 301}
 302
 303/* Temperature range */
 304static const int TEMP_RANGE[] = {2000, 2500, 3333, 4000, 5000, 6666, 8000,
 305                                 10000, 13333, 16000, 20000, 26666, 32000,
 306                                 40000, 53333, 80000};
 307
 308static inline int TEMP_RANGE_FROM_REG(int reg)
 309{
 310        return TEMP_RANGE[(reg >> 4) & 0x0f];
 311}
 312
 313static int TEMP_RANGE_TO_REG(long val, int reg)
 314{
 315        int i;
 316
 317        for (i = 15; i > 0; i--) {
 318                if (val > (TEMP_RANGE[i] + TEMP_RANGE[i - 1] + 1) / 2)
 319                        break;
 320        }
 321
 322        return (reg & 0x0f) | (i << 4);
 323}
 324
 325/*
 326 * Temperature hysteresis
 327 * Register layout:
 328 *    reg[0] = [H1-3, H1-2, H1-1, H1-0, H2-3, H2-2, H2-1, H2-0]
 329 *    reg[1] = [H3-3, H3-2, H3-1, H3-0, xxxx, xxxx, xxxx, xxxx]
 330 */
 331static inline int TEMP_HYST_FROM_REG(int reg, int ix)
 332{
 333        return (((ix == 1) ? reg : reg >> 4) & 0x0f) * 1000;
 334}
 335
 336static inline int TEMP_HYST_TO_REG(int temp, long hyst, int ix, int reg)
 337{
 338        hyst = clamp_val(hyst, temp - 15000, temp);
 339        hyst = DIV_ROUND_CLOSEST(temp - hyst, 1000);
 340
 341        return (ix == 1) ? (reg & 0xf0) | hyst : (reg & 0x0f) | (hyst << 4);
 342}
 343
 344/* Fan input RPM */
 345static inline int FAN_FROM_REG(int reg, int tpc)
 346{
 347        if (tpc)
 348                return tpc * reg;
 349        else
 350                return (reg == 0 || reg == 0xffff) ? 0 : 90000 * 60 / reg;
 351}
 352
 353static inline int FAN_TO_REG(long val, int tpc)
 354{
 355        if (tpc) {
 356                return clamp_val(val / tpc, 0, 0xffff);
 357        } else {
 358                return (val <= 0) ? 0xffff :
 359                        clamp_val(90000 * 60 / val, 0, 0xfffe);
 360        }
 361}
 362
 363/*
 364 * Fan TPC (tach pulse count)
 365 * Converts a register value to a TPC multiplier or returns 0 if the tachometer
 366 * is configured in legacy (non-tpc) mode
 367 */
 368static inline int FAN_TPC_FROM_REG(int reg)
 369{
 370        return (reg & 0x20) ? 0 : 60 >> (reg & 0x03);
 371}
 372
 373/*
 374 * Fan type
 375 * The type of a fan is expressed in number of pulses-per-revolution that it
 376 * emits
 377 */
 378static inline int FAN_TYPE_FROM_REG(int reg)
 379{
 380        int edge = (reg >> 1) & 0x03;
 381
 382        return (edge > 0) ? 1 << (edge - 1) : 0;
 383}
 384
 385static inline int FAN_TYPE_TO_REG(long val, int reg)
 386{
 387        int edge = (val == 4) ? 3 : val;
 388
 389        return (reg & 0xf9) | (edge << 1);
 390}
 391
 392/* Fan max RPM */
 393static const int FAN_MAX[] = {0x54, 0x38, 0x2a, 0x21, 0x1c, 0x18, 0x15, 0x12,
 394                              0x11, 0x0f, 0x0e};
 395
 396static int FAN_MAX_FROM_REG(int reg)
 397{
 398        int i;
 399
 400        for (i = 10; i > 0; i--) {
 401                if (reg == FAN_MAX[i])
 402                        break;
 403        }
 404
 405        return 1000 + i * 500;
 406}
 407
 408static int FAN_MAX_TO_REG(long val)
 409{
 410        int i;
 411
 412        for (i = 10; i > 0; i--) {
 413                if (val > (1000 + (i - 1) * 500))
 414                        break;
 415        }
 416
 417        return FAN_MAX[i];
 418}
 419
 420/*
 421 * PWM enable
 422 * Register to enable mapping:
 423 * 000:  2  fan on zone 1 auto
 424 * 001:  2  fan on zone 2 auto
 425 * 010:  2  fan on zone 3 auto
 426 * 011:  0  fan full on
 427 * 100: -1  fan disabled
 428 * 101:  2  fan on hottest of zones 2,3 auto
 429 * 110:  2  fan on hottest of zones 1,2,3 auto
 430 * 111:  1  fan in manual mode
 431 */
 432static inline int PWM_EN_FROM_REG(int reg)
 433{
 434        static const int en[] = {2, 2, 2, 0, -1, 2, 2, 1};
 435
 436        return en[(reg >> 5) & 0x07];
 437}
 438
 439static inline int PWM_EN_TO_REG(int val, int reg)
 440{
 441        int en = (val == 1) ? 7 : 3;
 442
 443        return (reg & 0x1f) | ((en & 0x07) << 5);
 444}
 445
 446/*
 447 * PWM auto channels zone
 448 * Register to auto channels zone mapping (ACZ is a bitfield with bit x
 449 * corresponding to zone x+1):
 450 * 000: 001  fan on zone 1 auto
 451 * 001: 010  fan on zone 2 auto
 452 * 010: 100  fan on zone 3 auto
 453 * 011: 000  fan full on
 454 * 100: 000  fan disabled
 455 * 101: 110  fan on hottest of zones 2,3 auto
 456 * 110: 111  fan on hottest of zones 1,2,3 auto
 457 * 111: 000  fan in manual mode
 458 */
 459static inline int PWM_ACZ_FROM_REG(int reg)
 460{
 461        static const int acz[] = {1, 2, 4, 0, 0, 6, 7, 0};
 462
 463        return acz[(reg >> 5) & 0x07];
 464}
 465
 466static inline int PWM_ACZ_TO_REG(long val, int reg)
 467{
 468        int acz = (val == 4) ? 2 : val - 1;
 469
 470        return (reg & 0x1f) | ((acz & 0x07) << 5);
 471}
 472
 473/* PWM frequency */
 474static const int PWM_FREQ[] = {11, 15, 22, 29, 35, 44, 59, 88,
 475                               15000, 20000, 30000, 25000, 0, 0, 0, 0};
 476
 477static inline int PWM_FREQ_FROM_REG(int reg)
 478{
 479        return PWM_FREQ[reg & 0x0f];
 480}
 481
 482static int PWM_FREQ_TO_REG(long val, int reg)
 483{
 484        int i;
 485
 486        /* the first two cases are special - stupid chip design! */
 487        if (val > 27500) {
 488                i = 10;
 489        } else if (val > 22500) {
 490                i = 11;
 491        } else {
 492                for (i = 9; i > 0; i--) {
 493                        if (val > (PWM_FREQ[i] + PWM_FREQ[i - 1] + 1) / 2)
 494                                break;
 495                }
 496        }
 497
 498        return (reg & 0xf0) | i;
 499}
 500
 501/*
 502 * PWM ramp rate
 503 * Register layout:
 504 *    reg[0] = [OFF3,  OFF2,  OFF1,  RES,   RR1-E, RR1-2, RR1-1, RR1-0]
 505 *    reg[1] = [RR2-E, RR2-2, RR2-1, RR2-0, RR3-E, RR3-2, RR3-1, RR3-0]
 506 */
 507static const u8 PWM_RR[] = {206, 104, 69, 41, 26, 18, 10, 5};
 508
 509static inline int PWM_RR_FROM_REG(int reg, int ix)
 510{
 511        int rr = (ix == 1) ? reg >> 4 : reg;
 512
 513        return (rr & 0x08) ? PWM_RR[rr & 0x07] : 0;
 514}
 515
 516static int PWM_RR_TO_REG(long val, int ix, int reg)
 517{
 518        int i;
 519
 520        for (i = 0; i < 7; i++) {
 521                if (val > (PWM_RR[i] + PWM_RR[i + 1] + 1) / 2)
 522                        break;
 523        }
 524
 525        return (ix == 1) ? (reg & 0x8f) | (i << 4) : (reg & 0xf8) | i;
 526}
 527
 528/* PWM ramp rate enable */
 529static inline int PWM_RR_EN_FROM_REG(int reg, int ix)
 530{
 531        return PWM_RR_FROM_REG(reg, ix) ? 1 : 0;
 532}
 533
 534static inline int PWM_RR_EN_TO_REG(long val, int ix, int reg)
 535{
 536        int en = (ix == 1) ? 0x80 : 0x08;
 537
 538        return val ? reg | en : reg & ~en;
 539}
 540
 541/*
 542 * PWM min/off
 543 * The PWM min/off bits are part of the PMW ramp rate register 0 (see above for
 544 * the register layout).
 545 */
 546static inline int PWM_OFF_FROM_REG(int reg, int ix)
 547{
 548        return (reg >> (ix + 5)) & 0x01;
 549}
 550
 551static inline int PWM_OFF_TO_REG(int val, int ix, int reg)
 552{
 553        return (reg & ~(1 << (ix + 5))) | ((val & 0x01) << (ix + 5));
 554}
 555
 556/* ---------------------------------------------------------------------
 557 * Device I/O access
 558 *
 559 * ISA access is performed through an index/data register pair and needs to
 560 * be protected by a mutex during runtime (not required for initialization).
 561 * We use data->update_lock for this and need to ensure that we acquire it
 562 * before calling dme1737_read or dme1737_write.
 563 * --------------------------------------------------------------------- */
 564
 565static u8 dme1737_read(const struct dme1737_data *data, u8 reg)
 566{
 567        struct i2c_client *client = data->client;
 568        s32 val;
 569
 570        if (client) { /* I2C device */
 571                val = i2c_smbus_read_byte_data(client, reg);
 572
 573                if (val < 0) {
 574                        dev_warn(&client->dev,
 575                                 "Read from register 0x%02x failed! %s\n",
 576                                 reg, DO_REPORT);
 577                }
 578        } else { /* ISA device */
 579                outb(reg, data->addr);
 580                val = inb(data->addr + 1);
 581        }
 582
 583        return val;
 584}
 585
 586static s32 dme1737_write(const struct dme1737_data *data, u8 reg, u8 val)
 587{
 588        struct i2c_client *client = data->client;
 589        s32 res = 0;
 590
 591        if (client) { /* I2C device */
 592                res = i2c_smbus_write_byte_data(client, reg, val);
 593
 594                if (res < 0) {
 595                        dev_warn(&client->dev,
 596                                 "Write to register 0x%02x failed! %s\n",
 597                                 reg, DO_REPORT);
 598                }
 599        } else { /* ISA device */
 600                outb(reg, data->addr);
 601                outb(val, data->addr + 1);
 602        }
 603
 604        return res;
 605}
 606
 607static struct dme1737_data *dme1737_update_device(struct device *dev)
 608{
 609        struct dme1737_data *data = dev_get_drvdata(dev);
 610        int ix;
 611        u8 lsb[6];
 612
 613        mutex_lock(&data->update_lock);
 614
 615        /* Enable a Vbat monitoring cycle every 10 mins */
 616        if (time_after(jiffies, data->last_vbat + 600 * HZ) || !data->valid) {
 617                dme1737_write(data, DME1737_REG_CONFIG, dme1737_read(data,
 618                                                DME1737_REG_CONFIG) | 0x10);
 619                data->last_vbat = jiffies;
 620        }
 621
 622        /* Sample register contents every 1 sec */
 623        if (time_after(jiffies, data->last_update + HZ) || !data->valid) {
 624                if (data->has_features & HAS_VID) {
 625                        data->vid = dme1737_read(data, DME1737_REG_VID) &
 626                                0x3f;
 627                }
 628
 629                /* In (voltage) registers */
 630                for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
 631                        /*
 632                         * Voltage inputs are stored as 16 bit values even
 633                         * though they have only 12 bits resolution. This is
 634                         * to make it consistent with the temp inputs.
 635                         */
 636                        if (ix == 7 && !(data->has_features & HAS_IN7))
 637                                continue;
 638                        data->in[ix] = dme1737_read(data,
 639                                        DME1737_REG_IN(ix)) << 8;
 640                        data->in_min[ix] = dme1737_read(data,
 641                                        DME1737_REG_IN_MIN(ix));
 642                        data->in_max[ix] = dme1737_read(data,
 643                                        DME1737_REG_IN_MAX(ix));
 644                }
 645
 646                /* Temp registers */
 647                for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
 648                        /*
 649                         * Temp inputs are stored as 16 bit values even
 650                         * though they have only 12 bits resolution. This is
 651                         * to take advantage of implicit conversions between
 652                         * register values (2's complement) and temp values
 653                         * (signed decimal).
 654                         */
 655                        data->temp[ix] = dme1737_read(data,
 656                                        DME1737_REG_TEMP(ix)) << 8;
 657                        data->temp_min[ix] = dme1737_read(data,
 658                                        DME1737_REG_TEMP_MIN(ix));
 659                        data->temp_max[ix] = dme1737_read(data,
 660                                        DME1737_REG_TEMP_MAX(ix));
 661                        if (data->has_features & HAS_TEMP_OFFSET) {
 662                                data->temp_offset[ix] = dme1737_read(data,
 663                                                DME1737_REG_TEMP_OFFSET(ix));
 664                        }
 665                }
 666
 667                /*
 668                 * In and temp LSB registers
 669                 * The LSBs are latched when the MSBs are read, so the order in
 670                 * which the registers are read (MSB first, then LSB) is
 671                 * important!
 672                 */
 673                for (ix = 0; ix < ARRAY_SIZE(lsb); ix++) {
 674                        if (ix == 5 && !(data->has_features & HAS_IN7))
 675                                continue;
 676                        lsb[ix] = dme1737_read(data,
 677                                        DME1737_REG_IN_TEMP_LSB(ix));
 678                }
 679                for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
 680                        if (ix == 7 && !(data->has_features & HAS_IN7))
 681                                continue;
 682                        data->in[ix] |= (lsb[DME1737_REG_IN_LSB[ix]] <<
 683                                        DME1737_REG_IN_LSB_SHL[ix]) & 0xf0;
 684                }
 685                for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
 686                        data->temp[ix] |= (lsb[DME1737_REG_TEMP_LSB[ix]] <<
 687                                        DME1737_REG_TEMP_LSB_SHL[ix]) & 0xf0;
 688                }
 689
 690                /* Fan registers */
 691                for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
 692                        /*
 693                         * Skip reading registers if optional fans are not
 694                         * present
 695                         */
 696                        if (!(data->has_features & HAS_FAN(ix)))
 697                                continue;
 698                        data->fan[ix] = dme1737_read(data,
 699                                        DME1737_REG_FAN(ix));
 700                        data->fan[ix] |= dme1737_read(data,
 701                                        DME1737_REG_FAN(ix) + 1) << 8;
 702                        data->fan_min[ix] = dme1737_read(data,
 703                                        DME1737_REG_FAN_MIN(ix));
 704                        data->fan_min[ix] |= dme1737_read(data,
 705                                        DME1737_REG_FAN_MIN(ix) + 1) << 8;
 706                        data->fan_opt[ix] = dme1737_read(data,
 707                                        DME1737_REG_FAN_OPT(ix));
 708                        /* fan_max exists only for fan[5-6] */
 709                        if (ix > 3) {
 710                                data->fan_max[ix - 4] = dme1737_read(data,
 711                                        DME1737_REG_FAN_MAX(ix));
 712                        }
 713                }
 714
 715                /* PWM registers */
 716                for (ix = 0; ix < ARRAY_SIZE(data->pwm); ix++) {
 717                        /*
 718                         * Skip reading registers if optional PWMs are not
 719                         * present
 720                         */
 721                        if (!(data->has_features & HAS_PWM(ix)))
 722                                continue;
 723                        data->pwm[ix] = dme1737_read(data,
 724                                        DME1737_REG_PWM(ix));
 725                        data->pwm_freq[ix] = dme1737_read(data,
 726                                        DME1737_REG_PWM_FREQ(ix));
 727                        /* pwm_config and pwm_min exist only for pwm[1-3] */
 728                        if (ix < 3) {
 729                                data->pwm_config[ix] = dme1737_read(data,
 730                                                DME1737_REG_PWM_CONFIG(ix));
 731                                data->pwm_min[ix] = dme1737_read(data,
 732                                                DME1737_REG_PWM_MIN(ix));
 733                        }
 734                }
 735                for (ix = 0; ix < ARRAY_SIZE(data->pwm_rr); ix++) {
 736                        data->pwm_rr[ix] = dme1737_read(data,
 737                                                DME1737_REG_PWM_RR(ix));
 738                }
 739
 740                /* Thermal zone registers */
 741                for (ix = 0; ix < ARRAY_SIZE(data->zone_low); ix++) {
 742                        /* Skip reading registers if zone3 is not present */
 743                        if ((ix == 2) && !(data->has_features & HAS_ZONE3))
 744                                continue;
 745                        /* sch5127 zone2 registers are special */
 746                        if ((ix == 1) && (data->type == sch5127)) {
 747                                data->zone_low[1] = dme1737_read(data,
 748                                                DME1737_REG_ZONE_LOW(2));
 749                                data->zone_abs[1] = dme1737_read(data,
 750                                                DME1737_REG_ZONE_ABS(2));
 751                        } else {
 752                                data->zone_low[ix] = dme1737_read(data,
 753                                                DME1737_REG_ZONE_LOW(ix));
 754                                data->zone_abs[ix] = dme1737_read(data,
 755                                                DME1737_REG_ZONE_ABS(ix));
 756                        }
 757                }
 758                if (data->has_features & HAS_ZONE_HYST) {
 759                        for (ix = 0; ix < ARRAY_SIZE(data->zone_hyst); ix++) {
 760                                data->zone_hyst[ix] = dme1737_read(data,
 761                                                DME1737_REG_ZONE_HYST(ix));
 762                        }
 763                }
 764
 765                /* Alarm registers */
 766                data->alarms = dme1737_read(data,
 767                                                DME1737_REG_ALARM1);
 768                /*
 769                 * Bit 7 tells us if the other alarm registers are non-zero and
 770                 * therefore also need to be read
 771                 */
 772                if (data->alarms & 0x80) {
 773                        data->alarms |= dme1737_read(data,
 774                                                DME1737_REG_ALARM2) << 8;
 775                        data->alarms |= dme1737_read(data,
 776                                                DME1737_REG_ALARM3) << 16;
 777                }
 778
 779                /*
 780                 * The ISA chips require explicit clearing of alarm bits.
 781                 * Don't worry, an alarm will come back if the condition
 782                 * that causes it still exists
 783                 */
 784                if (!data->client) {
 785                        if (data->alarms & 0xff0000)
 786                                dme1737_write(data, DME1737_REG_ALARM3, 0xff);
 787                        if (data->alarms & 0xff00)
 788                                dme1737_write(data, DME1737_REG_ALARM2, 0xff);
 789                        if (data->alarms & 0xff)
 790                                dme1737_write(data, DME1737_REG_ALARM1, 0xff);
 791                }
 792
 793                data->last_update = jiffies;
 794                data->valid = 1;
 795        }
 796
 797        mutex_unlock(&data->update_lock);
 798
 799        return data;
 800}
 801
 802/* ---------------------------------------------------------------------
 803 * Voltage sysfs attributes
 804 * ix = [0-7]
 805 * --------------------------------------------------------------------- */
 806
 807#define SYS_IN_INPUT    0
 808#define SYS_IN_MIN      1
 809#define SYS_IN_MAX      2
 810#define SYS_IN_ALARM    3
 811
 812static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 813                       char *buf)
 814{
 815        struct dme1737_data *data = dme1737_update_device(dev);
 816        struct sensor_device_attribute_2
 817                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
 818        int ix = sensor_attr_2->index;
 819        int fn = sensor_attr_2->nr;
 820        int res;
 821
 822        switch (fn) {
 823        case SYS_IN_INPUT:
 824                res = IN_FROM_REG(data->in[ix], data->in_nominal[ix], 16);
 825                break;
 826        case SYS_IN_MIN:
 827                res = IN_FROM_REG(data->in_min[ix], data->in_nominal[ix], 8);
 828                break;
 829        case SYS_IN_MAX:
 830                res = IN_FROM_REG(data->in_max[ix], data->in_nominal[ix], 8);
 831                break;
 832        case SYS_IN_ALARM:
 833                res = (data->alarms >> DME1737_BIT_ALARM_IN[ix]) & 0x01;
 834                break;
 835        default:
 836                res = 0;
 837                dev_dbg(dev, "Unknown function %d.\n", fn);
 838        }
 839
 840        return sprintf(buf, "%d\n", res);
 841}
 842
 843static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 844                      const char *buf, size_t count)
 845{
 846        struct dme1737_data *data = dev_get_drvdata(dev);
 847        struct sensor_device_attribute_2
 848                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
 849        int ix = sensor_attr_2->index;
 850        int fn = sensor_attr_2->nr;
 851        long val;
 852        int err;
 853
 854        err = kstrtol(buf, 10, &val);
 855        if (err)
 856                return err;
 857
 858        mutex_lock(&data->update_lock);
 859        switch (fn) {
 860        case SYS_IN_MIN:
 861                data->in_min[ix] = IN_TO_REG(val, data->in_nominal[ix]);
 862                dme1737_write(data, DME1737_REG_IN_MIN(ix),
 863                              data->in_min[ix]);
 864                break;
 865        case SYS_IN_MAX:
 866                data->in_max[ix] = IN_TO_REG(val, data->in_nominal[ix]);
 867                dme1737_write(data, DME1737_REG_IN_MAX(ix),
 868                              data->in_max[ix]);
 869                break;
 870        default:
 871                dev_dbg(dev, "Unknown function %d.\n", fn);
 872        }
 873        mutex_unlock(&data->update_lock);
 874
 875        return count;
 876}
 877
 878/* ---------------------------------------------------------------------
 879 * Temperature sysfs attributes
 880 * ix = [0-2]
 881 * --------------------------------------------------------------------- */
 882
 883#define SYS_TEMP_INPUT                  0
 884#define SYS_TEMP_MIN                    1
 885#define SYS_TEMP_MAX                    2
 886#define SYS_TEMP_OFFSET                 3
 887#define SYS_TEMP_ALARM                  4
 888#define SYS_TEMP_FAULT                  5
 889
 890static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 891                         char *buf)
 892{
 893        struct dme1737_data *data = dme1737_update_device(dev);
 894        struct sensor_device_attribute_2
 895                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
 896        int ix = sensor_attr_2->index;
 897        int fn = sensor_attr_2->nr;
 898        int res;
 899
 900        switch (fn) {
 901        case SYS_TEMP_INPUT:
 902                res = TEMP_FROM_REG(data->temp[ix], 16);
 903                break;
 904        case SYS_TEMP_MIN:
 905                res = TEMP_FROM_REG(data->temp_min[ix], 8);
 906                break;
 907        case SYS_TEMP_MAX:
 908                res = TEMP_FROM_REG(data->temp_max[ix], 8);
 909                break;
 910        case SYS_TEMP_OFFSET:
 911                res = TEMP_FROM_REG(data->temp_offset[ix], 8);
 912                break;
 913        case SYS_TEMP_ALARM:
 914                res = (data->alarms >> DME1737_BIT_ALARM_TEMP[ix]) & 0x01;
 915                break;
 916        case SYS_TEMP_FAULT:
 917                res = (((u16)data->temp[ix] & 0xff00) == 0x8000);
 918                break;
 919        default:
 920                res = 0;
 921                dev_dbg(dev, "Unknown function %d.\n", fn);
 922        }
 923
 924        return sprintf(buf, "%d\n", res);
 925}
 926
 927static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 928                        const char *buf, size_t count)
 929{
 930        struct dme1737_data *data = dev_get_drvdata(dev);
 931        struct sensor_device_attribute_2
 932                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
 933        int ix = sensor_attr_2->index;
 934        int fn = sensor_attr_2->nr;
 935        long val;
 936        int err;
 937
 938        err = kstrtol(buf, 10, &val);
 939        if (err)
 940                return err;
 941
 942        mutex_lock(&data->update_lock);
 943        switch (fn) {
 944        case SYS_TEMP_MIN:
 945                data->temp_min[ix] = TEMP_TO_REG(val);
 946                dme1737_write(data, DME1737_REG_TEMP_MIN(ix),
 947                              data->temp_min[ix]);
 948                break;
 949        case SYS_TEMP_MAX:
 950                data->temp_max[ix] = TEMP_TO_REG(val);
 951                dme1737_write(data, DME1737_REG_TEMP_MAX(ix),
 952                              data->temp_max[ix]);
 953                break;
 954        case SYS_TEMP_OFFSET:
 955                data->temp_offset[ix] = TEMP_TO_REG(val);
 956                dme1737_write(data, DME1737_REG_TEMP_OFFSET(ix),
 957                              data->temp_offset[ix]);
 958                break;
 959        default:
 960                dev_dbg(dev, "Unknown function %d.\n", fn);
 961        }
 962        mutex_unlock(&data->update_lock);
 963
 964        return count;
 965}
 966
 967/* ---------------------------------------------------------------------
 968 * Zone sysfs attributes
 969 * ix = [0-2]
 970 * --------------------------------------------------------------------- */
 971
 972#define SYS_ZONE_AUTO_CHANNELS_TEMP     0
 973#define SYS_ZONE_AUTO_POINT1_TEMP_HYST  1
 974#define SYS_ZONE_AUTO_POINT1_TEMP       2
 975#define SYS_ZONE_AUTO_POINT2_TEMP       3
 976#define SYS_ZONE_AUTO_POINT3_TEMP       4
 977
 978static ssize_t show_zone(struct device *dev, struct device_attribute *attr,
 979                         char *buf)
 980{
 981        struct dme1737_data *data = dme1737_update_device(dev);
 982        struct sensor_device_attribute_2
 983                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
 984        int ix = sensor_attr_2->index;
 985        int fn = sensor_attr_2->nr;
 986        int res;
 987
 988        switch (fn) {
 989        case SYS_ZONE_AUTO_CHANNELS_TEMP:
 990                /* check config2 for non-standard temp-to-zone mapping */
 991                if ((ix == 1) && (data->config2 & 0x02))
 992                        res = 4;
 993                else
 994                        res = 1 << ix;
 995                break;
 996        case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
 997                res = TEMP_FROM_REG(data->zone_low[ix], 8) -
 998                      TEMP_HYST_FROM_REG(data->zone_hyst[ix == 2], ix);
 999                break;
1000        case SYS_ZONE_AUTO_POINT1_TEMP:
1001                res = TEMP_FROM_REG(data->zone_low[ix], 8);
1002                break;
1003        case SYS_ZONE_AUTO_POINT2_TEMP:
1004                /* pwm_freq holds the temp range bits in the upper nibble */
1005                res = TEMP_FROM_REG(data->zone_low[ix], 8) +
1006                      TEMP_RANGE_FROM_REG(data->pwm_freq[ix]);
1007                break;
1008        case SYS_ZONE_AUTO_POINT3_TEMP:
1009                res = TEMP_FROM_REG(data->zone_abs[ix], 8);
1010                break;
1011        default:
1012                res = 0;
1013                dev_dbg(dev, "Unknown function %d.\n", fn);
1014        }
1015
1016        return sprintf(buf, "%d\n", res);
1017}
1018
1019static ssize_t set_zone(struct device *dev, struct device_attribute *attr,
1020                        const char *buf, size_t count)
1021{
1022        struct dme1737_data *data = dev_get_drvdata(dev);
1023        struct sensor_device_attribute_2
1024                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
1025        int ix = sensor_attr_2->index;
1026        int fn = sensor_attr_2->nr;
1027        long val;
1028        int temp;
1029        int err;
1030        u8 reg;
1031
1032        err = kstrtol(buf, 10, &val);
1033        if (err)
1034                return err;
1035
1036        mutex_lock(&data->update_lock);
1037        switch (fn) {
1038        case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
1039                /* Refresh the cache */
1040                data->zone_low[ix] = dme1737_read(data,
1041                                                  DME1737_REG_ZONE_LOW(ix));
1042                /* Modify the temp hyst value */
1043                temp = TEMP_FROM_REG(data->zone_low[ix], 8);
1044                reg = dme1737_read(data, DME1737_REG_ZONE_HYST(ix == 2));
1045                data->zone_hyst[ix == 2] = TEMP_HYST_TO_REG(temp, val, ix, reg);
1046                dme1737_write(data, DME1737_REG_ZONE_HYST(ix == 2),
1047                              data->zone_hyst[ix == 2]);
1048                break;
1049        case SYS_ZONE_AUTO_POINT1_TEMP:
1050                data->zone_low[ix] = TEMP_TO_REG(val);
1051                dme1737_write(data, DME1737_REG_ZONE_LOW(ix),
1052                              data->zone_low[ix]);
1053                break;
1054        case SYS_ZONE_AUTO_POINT2_TEMP:
1055                /* Refresh the cache */
1056                data->zone_low[ix] = dme1737_read(data,
1057                                                  DME1737_REG_ZONE_LOW(ix));
1058                /*
1059                 * Modify the temp range value (which is stored in the upper
1060                 * nibble of the pwm_freq register)
1061                 */
1062                temp = TEMP_FROM_REG(data->zone_low[ix], 8);
1063                val = clamp_val(val, temp, temp + 80000);
1064                reg = dme1737_read(data, DME1737_REG_PWM_FREQ(ix));
1065                data->pwm_freq[ix] = TEMP_RANGE_TO_REG(val - temp, reg);
1066                dme1737_write(data, DME1737_REG_PWM_FREQ(ix),
1067                              data->pwm_freq[ix]);
1068                break;
1069        case SYS_ZONE_AUTO_POINT3_TEMP:
1070                data->zone_abs[ix] = TEMP_TO_REG(val);
1071                dme1737_write(data, DME1737_REG_ZONE_ABS(ix),
1072                              data->zone_abs[ix]);
1073                break;
1074        default:
1075                dev_dbg(dev, "Unknown function %d.\n", fn);
1076        }
1077        mutex_unlock(&data->update_lock);
1078
1079        return count;
1080}
1081
1082/* ---------------------------------------------------------------------
1083 * Fan sysfs attributes
1084 * ix = [0-5]
1085 * --------------------------------------------------------------------- */
1086
1087#define SYS_FAN_INPUT   0
1088#define SYS_FAN_MIN     1
1089#define SYS_FAN_MAX     2
1090#define SYS_FAN_ALARM   3
1091#define SYS_FAN_TYPE    4
1092
1093static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
1094                        char *buf)
1095{
1096        struct dme1737_data *data = dme1737_update_device(dev);
1097        struct sensor_device_attribute_2
1098                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
1099        int ix = sensor_attr_2->index;
1100        int fn = sensor_attr_2->nr;
1101        int res;
1102
1103        switch (fn) {
1104        case SYS_FAN_INPUT:
1105                res = FAN_FROM_REG(data->fan[ix],
1106                                   ix < 4 ? 0 :
1107                                   FAN_TPC_FROM_REG(data->fan_opt[ix]));
1108                break;
1109        case SYS_FAN_MIN:
1110                res = FAN_FROM_REG(data->fan_min[ix],
1111                                   ix < 4 ? 0 :
1112                                   FAN_TPC_FROM_REG(data->fan_opt[ix]));
1113                break;
1114        case SYS_FAN_MAX:
1115                /* only valid for fan[5-6] */
1116                res = FAN_MAX_FROM_REG(data->fan_max[ix - 4]);
1117                break;
1118        case SYS_FAN_ALARM:
1119                res = (data->alarms >> DME1737_BIT_ALARM_FAN[ix]) & 0x01;
1120                break;
1121        case SYS_FAN_TYPE:
1122                /* only valid for fan[1-4] */
1123                res = FAN_TYPE_FROM_REG(data->fan_opt[ix]);
1124                break;
1125        default:
1126                res = 0;
1127                dev_dbg(dev, "Unknown function %d.\n", fn);
1128        }
1129
1130        return sprintf(buf, "%d\n", res);
1131}
1132
1133static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
1134                       const char *buf, size_t count)
1135{
1136        struct dme1737_data *data = dev_get_drvdata(dev);
1137        struct sensor_device_attribute_2
1138                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
1139        int ix = sensor_attr_2->index;
1140        int fn = sensor_attr_2->nr;
1141        long val;
1142        int err;
1143
1144        err = kstrtol(buf, 10, &val);
1145        if (err)
1146                return err;
1147
1148        mutex_lock(&data->update_lock);
1149        switch (fn) {
1150        case SYS_FAN_MIN:
1151                if (ix < 4) {
1152                        data->fan_min[ix] = FAN_TO_REG(val, 0);
1153                } else {
1154                        /* Refresh the cache */
1155                        data->fan_opt[ix] = dme1737_read(data,
1156                                                DME1737_REG_FAN_OPT(ix));
1157                        /* Modify the fan min value */
1158                        data->fan_min[ix] = FAN_TO_REG(val,
1159                                        FAN_TPC_FROM_REG(data->fan_opt[ix]));
1160                }
1161                dme1737_write(data, DME1737_REG_FAN_MIN(ix),
1162                              data->fan_min[ix] & 0xff);
1163                dme1737_write(data, DME1737_REG_FAN_MIN(ix) + 1,
1164                              data->fan_min[ix] >> 8);
1165                break;
1166        case SYS_FAN_MAX:
1167                /* Only valid for fan[5-6] */
1168                data->fan_max[ix - 4] = FAN_MAX_TO_REG(val);
1169                dme1737_write(data, DME1737_REG_FAN_MAX(ix),
1170                              data->fan_max[ix - 4]);
1171                break;
1172        case SYS_FAN_TYPE:
1173                /* Only valid for fan[1-4] */
1174                if (!(val == 1 || val == 2 || val == 4)) {
1175                        count = -EINVAL;
1176                        dev_warn(dev,
1177                                 "Fan type value %ld not supported. Choose one of 1, 2, or 4.\n",
1178                                 val);
1179                        goto exit;
1180                }
1181                data->fan_opt[ix] = FAN_TYPE_TO_REG(val, dme1737_read(data,
1182                                        DME1737_REG_FAN_OPT(ix)));
1183                dme1737_write(data, DME1737_REG_FAN_OPT(ix),
1184                              data->fan_opt[ix]);
1185                break;
1186        default:
1187                dev_dbg(dev, "Unknown function %d.\n", fn);
1188        }
1189exit:
1190        mutex_unlock(&data->update_lock);
1191
1192        return count;
1193}
1194
1195/* ---------------------------------------------------------------------
1196 * PWM sysfs attributes
1197 * ix = [0-4]
1198 * --------------------------------------------------------------------- */
1199
1200#define SYS_PWM                         0
1201#define SYS_PWM_FREQ                    1
1202#define SYS_PWM_ENABLE                  2
1203#define SYS_PWM_RAMP_RATE               3
1204#define SYS_PWM_AUTO_CHANNELS_ZONE      4
1205#define SYS_PWM_AUTO_PWM_MIN            5
1206#define SYS_PWM_AUTO_POINT1_PWM         6
1207#define SYS_PWM_AUTO_POINT2_PWM         7
1208
1209static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
1210                        char *buf)
1211{
1212        struct dme1737_data *data = dme1737_update_device(dev);
1213        struct sensor_device_attribute_2
1214                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
1215        int ix = sensor_attr_2->index;
1216        int fn = sensor_attr_2->nr;
1217        int res;
1218
1219        switch (fn) {
1220        case SYS_PWM:
1221                if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 0)
1222                        res = 255;
1223                else
1224                        res = data->pwm[ix];
1225                break;
1226        case SYS_PWM_FREQ:
1227                res = PWM_FREQ_FROM_REG(data->pwm_freq[ix]);
1228                break;
1229        case SYS_PWM_ENABLE:
1230                if (ix >= 3)
1231                        res = 1; /* pwm[5-6] hard-wired to manual mode */
1232                else
1233                        res = PWM_EN_FROM_REG(data->pwm_config[ix]);
1234                break;
1235        case SYS_PWM_RAMP_RATE:
1236                /* Only valid for pwm[1-3] */
1237                res = PWM_RR_FROM_REG(data->pwm_rr[ix > 0], ix);
1238                break;
1239        case SYS_PWM_AUTO_CHANNELS_ZONE:
1240                /* Only valid for pwm[1-3] */
1241                if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2)
1242                        res = PWM_ACZ_FROM_REG(data->pwm_config[ix]);
1243                else
1244                        res = data->pwm_acz[ix];
1245                break;
1246        case SYS_PWM_AUTO_PWM_MIN:
1247                /* Only valid for pwm[1-3] */
1248                if (PWM_OFF_FROM_REG(data->pwm_rr[0], ix))
1249                        res = data->pwm_min[ix];
1250                else
1251                        res = 0;
1252                break;
1253        case SYS_PWM_AUTO_POINT1_PWM:
1254                /* Only valid for pwm[1-3] */
1255                res = data->pwm_min[ix];
1256                break;
1257        case SYS_PWM_AUTO_POINT2_PWM:
1258                /* Only valid for pwm[1-3] */
1259                res = 255; /* hard-wired */
1260                break;
1261        default:
1262                res = 0;
1263                dev_dbg(dev, "Unknown function %d.\n", fn);
1264        }
1265
1266        return sprintf(buf, "%d\n", res);
1267}
1268
1269static struct attribute *dme1737_pwm_chmod_attr[];
1270static void dme1737_chmod_file(struct device*, struct attribute*, umode_t);
1271
1272static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1273                       const char *buf, size_t count)
1274{
1275        struct dme1737_data *data = dev_get_drvdata(dev);
1276        struct sensor_device_attribute_2
1277                *sensor_attr_2 = to_sensor_dev_attr_2(attr);
1278        int ix = sensor_attr_2->index;
1279        int fn = sensor_attr_2->nr;
1280        long val;
1281        int err;
1282
1283        err = kstrtol(buf, 10, &val);
1284        if (err)
1285                return err;
1286
1287        mutex_lock(&data->update_lock);
1288        switch (fn) {
1289        case SYS_PWM:
1290                data->pwm[ix] = clamp_val(val, 0, 255);
1291                dme1737_write(data, DME1737_REG_PWM(ix), data->pwm[ix]);
1292                break;
1293        case SYS_PWM_FREQ:
1294                data->pwm_freq[ix] = PWM_FREQ_TO_REG(val, dme1737_read(data,
1295                                                DME1737_REG_PWM_FREQ(ix)));
1296                dme1737_write(data, DME1737_REG_PWM_FREQ(ix),
1297                              data->pwm_freq[ix]);
1298                break;
1299        case SYS_PWM_ENABLE:
1300                /* Only valid for pwm[1-3] */
1301                if (val < 0 || val > 2) {
1302                        count = -EINVAL;
1303                        dev_warn(dev,
1304                                 "PWM enable %ld not supported. Choose one of 0, 1, or 2.\n",
1305                                 val);
1306                        goto exit;
1307                }
1308                /* Refresh the cache */
1309                data->pwm_config[ix] = dme1737_read(data,
1310                                                DME1737_REG_PWM_CONFIG(ix));
1311                if (val == PWM_EN_FROM_REG(data->pwm_config[ix])) {
1312                        /* Bail out if no change */
1313                        goto exit;
1314                }
1315                /* Do some housekeeping if we are currently in auto mode */
1316                if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
1317                        /* Save the current zone channel assignment */
1318                        data->pwm_acz[ix] = PWM_ACZ_FROM_REG(
1319                                                        data->pwm_config[ix]);
1320                        /* Save the current ramp rate state and disable it */
1321                        data->pwm_rr[ix > 0] = dme1737_read(data,
1322                                                DME1737_REG_PWM_RR(ix > 0));
1323                        data->pwm_rr_en &= ~(1 << ix);
1324                        if (PWM_RR_EN_FROM_REG(data->pwm_rr[ix > 0], ix)) {
1325                                data->pwm_rr_en |= (1 << ix);
1326                                data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(0, ix,
1327                                                        data->pwm_rr[ix > 0]);
1328                                dme1737_write(data,
1329                                              DME1737_REG_PWM_RR(ix > 0),
1330                                              data->pwm_rr[ix > 0]);
1331                        }
1332                }
1333                /* Set the new PWM mode */
1334                switch (val) {
1335                case 0:
1336                        /* Change permissions of pwm[ix] to read-only */
1337                        dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
1338                                           S_IRUGO);
1339                        /* Turn fan fully on */
1340                        data->pwm_config[ix] = PWM_EN_TO_REG(0,
1341                                                        data->pwm_config[ix]);
1342                        dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1343                                      data->pwm_config[ix]);
1344                        break;
1345                case 1:
1346                        /* Turn on manual mode */
1347                        data->pwm_config[ix] = PWM_EN_TO_REG(1,
1348                                                        data->pwm_config[ix]);
1349                        dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1350                                      data->pwm_config[ix]);
1351                        /* Change permissions of pwm[ix] to read-writeable */
1352                        dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
1353                                           S_IRUGO | S_IWUSR);
1354                        break;
1355                case 2:
1356                        /* Change permissions of pwm[ix] to read-only */
1357                        dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
1358                                           S_IRUGO);
1359                        /*
1360                         * Turn on auto mode using the saved zone channel
1361                         * assignment
1362                         */
1363                        data->pwm_config[ix] = PWM_ACZ_TO_REG(
1364                                                        data->pwm_acz[ix],
1365                                                        data->pwm_config[ix]);
1366                        dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1367                                      data->pwm_config[ix]);
1368                        /* Enable PWM ramp rate if previously enabled */
1369                        if (data->pwm_rr_en & (1 << ix)) {
1370                                data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(1, ix,
1371                                                dme1737_read(data,
1372                                                DME1737_REG_PWM_RR(ix > 0)));
1373                                dme1737_write(data,
1374                                              DME1737_REG_PWM_RR(ix > 0),
1375                                              data->pwm_rr[ix > 0]);
1376                        }
1377                        break;
1378                }
1379                break;
1380        case SYS_PWM_RAMP_RATE:
1381                /* Only valid for pwm[1-3] */
1382                /* Refresh the cache */
1383                data->pwm_config[ix] = dme1737_read(data,
1384                                                DME1737_REG_PWM_CONFIG(ix));
1385                data->pwm_rr[ix > 0] = dme1737_read(data,
1386                                                DME1737_REG_PWM_RR(ix > 0));
1387                /* Set the ramp rate value */
1388                if (val > 0) {
1389                        data->pwm_rr[ix > 0] = PWM_RR_TO_REG(val, ix,
1390                                                        data->pwm_rr[ix > 0]);
1391                }
1392                /*
1393                 * Enable/disable the feature only if the associated PWM
1394                 * output is in automatic mode.
1395                 */
1396                if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
1397                        data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(val > 0, ix,
1398                                                        data->pwm_rr[ix > 0]);
1399                }
1400                dme1737_write(data, DME1737_REG_PWM_RR(ix > 0),
1401                              data->pwm_rr[ix > 0]);
1402                break;
1403        case SYS_PWM_AUTO_CHANNELS_ZONE:
1404                /* Only valid for pwm[1-3] */
1405                if (!(val == 1 || val == 2 || val == 4 ||
1406                      val == 6 || val == 7)) {
1407                        count = -EINVAL;
1408                        dev_warn(dev,
1409                                 "PWM auto channels zone %ld not supported. Choose one of 1, 2, 4, 6, "
1410                                 "or 7.\n", val);
1411                        goto exit;
1412                }
1413                /* Refresh the cache */
1414                data->pwm_config[ix] = dme1737_read(data,
1415                                                DME1737_REG_PWM_CONFIG(ix));
1416                if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
1417                        /*
1418                         * PWM is already in auto mode so update the temp
1419                         * channel assignment
1420                         */
1421                        data->pwm_config[ix] = PWM_ACZ_TO_REG(val,
1422                                                data->pwm_config[ix]);
1423                        dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
1424                                      data->pwm_config[ix]);
1425                } else {
1426                        /*
1427                         * PWM is not in auto mode so we save the temp
1428                         * channel assignment for later use
1429                         */
1430                        data->pwm_acz[ix] = val;
1431                }
1432                break;
1433        case SYS_PWM_AUTO_PWM_MIN:
1434                /* Only valid for pwm[1-3] */
1435                /* Refresh the cache */
1436                data->pwm_min[ix] = dme1737_read(data,
1437                                                DME1737_REG_PWM_MIN(ix));
1438                /*
1439                 * There are only 2 values supported for the auto_pwm_min
1440                 * value: 0 or auto_point1_pwm. So if the temperature drops
1441                 * below the auto_point1_temp_hyst value, the fan either turns
1442                 * off or runs at auto_point1_pwm duty-cycle.
1443                 */
1444                if (val > ((data->pwm_min[ix] + 1) / 2)) {
1445                        data->pwm_rr[0] = PWM_OFF_TO_REG(1, ix,
1446                                                dme1737_read(data,
1447                                                DME1737_REG_PWM_RR(0)));
1448                } else {
1449                        data->pwm_rr[0] = PWM_OFF_TO_REG(0, ix,
1450                                                dme1737_read(data,
1451                                                DME1737_REG_PWM_RR(0)));
1452                }
1453                dme1737_write(data, DME1737_REG_PWM_RR(0),
1454                              data->pwm_rr[0]);
1455                break;
1456        case SYS_PWM_AUTO_POINT1_PWM:
1457                /* Only valid for pwm[1-3] */
1458                data->pwm_min[ix] = clamp_val(val, 0, 255);
1459                dme1737_write(data, DME1737_REG_PWM_MIN(ix),
1460                              data->pwm_min[ix]);
1461                break;
1462        default:
1463                dev_dbg(dev, "Unknown function %d.\n", fn);
1464        }
1465exit:
1466        mutex_unlock(&data->update_lock);
1467
1468        return count;
1469}
1470
1471/* ---------------------------------------------------------------------
1472 * Miscellaneous sysfs attributes
1473 * --------------------------------------------------------------------- */
1474
1475static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
1476                        char *buf)
1477{
1478        struct i2c_client *client = to_i2c_client(dev);
1479        struct dme1737_data *data = i2c_get_clientdata(client);
1480
1481        return sprintf(buf, "%d\n", data->vrm);
1482}
1483
1484static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
1485                         const char *buf, size_t count)
1486{
1487        struct dme1737_data *data = dev_get_drvdata(dev);
1488        unsigned long val;
1489        int err;
1490
1491        err = kstrtoul(buf, 10, &val);
1492        if (err)
1493                return err;
1494
1495        if (val > 255)
1496                return -EINVAL;
1497
1498        data->vrm = val;
1499        return count;
1500}
1501
1502static ssize_t cpu0_vid_show(struct device *dev,
1503                             struct device_attribute *attr, char *buf)
1504{
1505        struct dme1737_data *data = dme1737_update_device(dev);
1506
1507        return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
1508}
1509
1510static ssize_t name_show(struct device *dev, struct device_attribute *attr,
1511                         char *buf)
1512{
1513        struct dme1737_data *data = dev_get_drvdata(dev);
1514
1515        return sprintf(buf, "%s\n", data->name);
1516}
1517
1518/* ---------------------------------------------------------------------
1519 * Sysfs device attribute defines and structs
1520 * --------------------------------------------------------------------- */
1521
1522/* Voltages 0-7 */
1523
1524#define SENSOR_DEVICE_ATTR_IN(ix) \
1525static SENSOR_DEVICE_ATTR_2(in##ix##_input, S_IRUGO, \
1526        show_in, NULL, SYS_IN_INPUT, ix); \
1527static SENSOR_DEVICE_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
1528        show_in, set_in, SYS_IN_MIN, ix); \
1529static SENSOR_DEVICE_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
1530        show_in, set_in, SYS_IN_MAX, ix); \
1531static SENSOR_DEVICE_ATTR_2(in##ix##_alarm, S_IRUGO, \
1532        show_in, NULL, SYS_IN_ALARM, ix)
1533
1534SENSOR_DEVICE_ATTR_IN(0);
1535SENSOR_DEVICE_ATTR_IN(1);
1536SENSOR_DEVICE_ATTR_IN(2);
1537SENSOR_DEVICE_ATTR_IN(3);
1538SENSOR_DEVICE_ATTR_IN(4);
1539SENSOR_DEVICE_ATTR_IN(5);
1540SENSOR_DEVICE_ATTR_IN(6);
1541SENSOR_DEVICE_ATTR_IN(7);
1542
1543/* Temperatures 1-3 */
1544
1545#define SENSOR_DEVICE_ATTR_TEMP(ix) \
1546static SENSOR_DEVICE_ATTR_2(temp##ix##_input, S_IRUGO, \
1547        show_temp, NULL, SYS_TEMP_INPUT, ix-1); \
1548static SENSOR_DEVICE_ATTR_2(temp##ix##_min, S_IRUGO | S_IWUSR, \
1549        show_temp, set_temp, SYS_TEMP_MIN, ix-1); \
1550static SENSOR_DEVICE_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
1551        show_temp, set_temp, SYS_TEMP_MAX, ix-1); \
1552static SENSOR_DEVICE_ATTR_2(temp##ix##_offset, S_IRUGO, \
1553        show_temp, set_temp, SYS_TEMP_OFFSET, ix-1); \
1554static SENSOR_DEVICE_ATTR_2(temp##ix##_alarm, S_IRUGO, \
1555        show_temp, NULL, SYS_TEMP_ALARM, ix-1); \
1556static SENSOR_DEVICE_ATTR_2(temp##ix##_fault, S_IRUGO, \
1557        show_temp, NULL, SYS_TEMP_FAULT, ix-1)
1558
1559SENSOR_DEVICE_ATTR_TEMP(1);
1560SENSOR_DEVICE_ATTR_TEMP(2);
1561SENSOR_DEVICE_ATTR_TEMP(3);
1562
1563/* Zones 1-3 */
1564
1565#define SENSOR_DEVICE_ATTR_ZONE(ix) \
1566static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_channels_temp, S_IRUGO, \
1567        show_zone, NULL, SYS_ZONE_AUTO_CHANNELS_TEMP, ix-1); \
1568static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point1_temp_hyst, S_IRUGO, \
1569        show_zone, set_zone, SYS_ZONE_AUTO_POINT1_TEMP_HYST, ix-1); \
1570static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point1_temp, S_IRUGO, \
1571        show_zone, set_zone, SYS_ZONE_AUTO_POINT1_TEMP, ix-1); \
1572static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point2_temp, S_IRUGO, \
1573        show_zone, set_zone, SYS_ZONE_AUTO_POINT2_TEMP, ix-1); \
1574static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point3_temp, S_IRUGO, \
1575        show_zone, set_zone, SYS_ZONE_AUTO_POINT3_TEMP, ix-1)
1576
1577SENSOR_DEVICE_ATTR_ZONE(1);
1578SENSOR_DEVICE_ATTR_ZONE(2);
1579SENSOR_DEVICE_ATTR_ZONE(3);
1580
1581/* Fans 1-4 */
1582
1583#define SENSOR_DEVICE_ATTR_FAN_1TO4(ix) \
1584static SENSOR_DEVICE_ATTR_2(fan##ix##_input, S_IRUGO, \
1585        show_fan, NULL, SYS_FAN_INPUT, ix-1); \
1586static SENSOR_DEVICE_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1587        show_fan, set_fan, SYS_FAN_MIN, ix-1); \
1588static SENSOR_DEVICE_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1589        show_fan, NULL, SYS_FAN_ALARM, ix-1); \
1590static SENSOR_DEVICE_ATTR_2(fan##ix##_type, S_IRUGO | S_IWUSR, \
1591        show_fan, set_fan, SYS_FAN_TYPE, ix-1)
1592
1593SENSOR_DEVICE_ATTR_FAN_1TO4(1);
1594SENSOR_DEVICE_ATTR_FAN_1TO4(2);
1595SENSOR_DEVICE_ATTR_FAN_1TO4(3);
1596SENSOR_DEVICE_ATTR_FAN_1TO4(4);
1597
1598/* Fans 5-6 */
1599
1600#define SENSOR_DEVICE_ATTR_FAN_5TO6(ix) \
1601static SENSOR_DEVICE_ATTR_2(fan##ix##_input, S_IRUGO, \
1602        show_fan, NULL, SYS_FAN_INPUT, ix-1); \
1603static SENSOR_DEVICE_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
1604        show_fan, set_fan, SYS_FAN_MIN, ix-1); \
1605static SENSOR_DEVICE_ATTR_2(fan##ix##_alarm, S_IRUGO, \
1606        show_fan, NULL, SYS_FAN_ALARM, ix-1); \
1607static SENSOR_DEVICE_ATTR_2(fan##ix##_max, S_IRUGO | S_IWUSR, \
1608        show_fan, set_fan, SYS_FAN_MAX, ix-1)
1609
1610SENSOR_DEVICE_ATTR_FAN_5TO6(5);
1611SENSOR_DEVICE_ATTR_FAN_5TO6(6);
1612
1613/* PWMs 1-3 */
1614
1615#define SENSOR_DEVICE_ATTR_PWM_1TO3(ix) \
1616static SENSOR_DEVICE_ATTR_2(pwm##ix, S_IRUGO, \
1617        show_pwm, set_pwm, SYS_PWM, ix-1); \
1618static SENSOR_DEVICE_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1619        show_pwm, set_pwm, SYS_PWM_FREQ, ix-1); \
1620static SENSOR_DEVICE_ATTR_2(pwm##ix##_enable, S_IRUGO, \
1621        show_pwm, set_pwm, SYS_PWM_ENABLE, ix-1); \
1622static SENSOR_DEVICE_ATTR_2(pwm##ix##_ramp_rate, S_IRUGO, \
1623        show_pwm, set_pwm, SYS_PWM_RAMP_RATE, ix-1); \
1624static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_channels_zone, S_IRUGO, \
1625        show_pwm, set_pwm, SYS_PWM_AUTO_CHANNELS_ZONE, ix-1); \
1626static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_pwm_min, S_IRUGO, \
1627        show_pwm, set_pwm, SYS_PWM_AUTO_PWM_MIN, ix-1); \
1628static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_point1_pwm, S_IRUGO, \
1629        show_pwm, set_pwm, SYS_PWM_AUTO_POINT1_PWM, ix-1); \
1630static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_point2_pwm, S_IRUGO, \
1631        show_pwm, NULL, SYS_PWM_AUTO_POINT2_PWM, ix-1)
1632
1633SENSOR_DEVICE_ATTR_PWM_1TO3(1);
1634SENSOR_DEVICE_ATTR_PWM_1TO3(2);
1635SENSOR_DEVICE_ATTR_PWM_1TO3(3);
1636
1637/* PWMs 5-6 */
1638
1639#define SENSOR_DEVICE_ATTR_PWM_5TO6(ix) \
1640static SENSOR_DEVICE_ATTR_2(pwm##ix, S_IRUGO, \
1641        show_pwm, set_pwm, SYS_PWM, ix-1); \
1642static SENSOR_DEVICE_ATTR_2(pwm##ix##_freq, S_IRUGO, \
1643        show_pwm, set_pwm, SYS_PWM_FREQ, ix-1); \
1644static SENSOR_DEVICE_ATTR_2(pwm##ix##_enable, S_IRUGO, \
1645        show_pwm, NULL, SYS_PWM_ENABLE, ix-1)
1646
1647SENSOR_DEVICE_ATTR_PWM_5TO6(5);
1648SENSOR_DEVICE_ATTR_PWM_5TO6(6);
1649
1650/* Misc */
1651
1652static DEVICE_ATTR_RW(vrm);
1653static DEVICE_ATTR_RO(cpu0_vid);
1654static DEVICE_ATTR_RO(name);   /* for ISA devices */
1655
1656/*
1657 * This struct holds all the attributes that are always present and need to be
1658 * created unconditionally. The attributes that need modification of their
1659 * permissions are created read-only and write permissions are added or removed
1660 * on the fly when required
1661 */
1662static struct attribute *dme1737_attr[] = {
1663        /* Voltages */
1664        &sensor_dev_attr_in0_input.dev_attr.attr,
1665        &sensor_dev_attr_in0_min.dev_attr.attr,
1666        &sensor_dev_attr_in0_max.dev_attr.attr,
1667        &sensor_dev_attr_in0_alarm.dev_attr.attr,
1668        &sensor_dev_attr_in1_input.dev_attr.attr,
1669        &sensor_dev_attr_in1_min.dev_attr.attr,
1670        &sensor_dev_attr_in1_max.dev_attr.attr,
1671        &sensor_dev_attr_in1_alarm.dev_attr.attr,
1672        &sensor_dev_attr_in2_input.dev_attr.attr,
1673        &sensor_dev_attr_in2_min.dev_attr.attr,
1674        &sensor_dev_attr_in2_max.dev_attr.attr,
1675        &sensor_dev_attr_in2_alarm.dev_attr.attr,
1676        &sensor_dev_attr_in3_input.dev_attr.attr,
1677        &sensor_dev_attr_in3_min.dev_attr.attr,
1678        &sensor_dev_attr_in3_max.dev_attr.attr,
1679        &sensor_dev_attr_in3_alarm.dev_attr.attr,
1680        &sensor_dev_attr_in4_input.dev_attr.attr,
1681        &sensor_dev_attr_in4_min.dev_attr.attr,
1682        &sensor_dev_attr_in4_max.dev_attr.attr,
1683        &sensor_dev_attr_in4_alarm.dev_attr.attr,
1684        &sensor_dev_attr_in5_input.dev_attr.attr,
1685        &sensor_dev_attr_in5_min.dev_attr.attr,
1686        &sensor_dev_attr_in5_max.dev_attr.attr,
1687        &sensor_dev_attr_in5_alarm.dev_attr.attr,
1688        &sensor_dev_attr_in6_input.dev_attr.attr,
1689        &sensor_dev_attr_in6_min.dev_attr.attr,
1690        &sensor_dev_attr_in6_max.dev_attr.attr,
1691        &sensor_dev_attr_in6_alarm.dev_attr.attr,
1692        /* Temperatures */
1693        &sensor_dev_attr_temp1_input.dev_attr.attr,
1694        &sensor_dev_attr_temp1_min.dev_attr.attr,
1695        &sensor_dev_attr_temp1_max.dev_attr.attr,
1696        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1697        &sensor_dev_attr_temp1_fault.dev_attr.attr,
1698        &sensor_dev_attr_temp2_input.dev_attr.attr,
1699        &sensor_dev_attr_temp2_min.dev_attr.attr,
1700        &sensor_dev_attr_temp2_max.dev_attr.attr,
1701        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1702        &sensor_dev_attr_temp2_fault.dev_attr.attr,
1703        &sensor_dev_attr_temp3_input.dev_attr.attr,
1704        &sensor_dev_attr_temp3_min.dev_attr.attr,
1705        &sensor_dev_attr_temp3_max.dev_attr.attr,
1706        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1707        &sensor_dev_attr_temp3_fault.dev_attr.attr,
1708        /* Zones */
1709        &sensor_dev_attr_zone1_auto_point1_temp.dev_attr.attr,
1710        &sensor_dev_attr_zone1_auto_point2_temp.dev_attr.attr,
1711        &sensor_dev_attr_zone1_auto_point3_temp.dev_attr.attr,
1712        &sensor_dev_attr_zone1_auto_channels_temp.dev_attr.attr,
1713        &sensor_dev_attr_zone2_auto_point1_temp.dev_attr.attr,
1714        &sensor_dev_attr_zone2_auto_point2_temp.dev_attr.attr,
1715        &sensor_dev_attr_zone2_auto_point3_temp.dev_attr.attr,
1716        &sensor_dev_attr_zone2_auto_channels_temp.dev_attr.attr,
1717        NULL
1718};
1719
1720static const struct attribute_group dme1737_group = {
1721        .attrs = dme1737_attr,
1722};
1723
1724/*
1725 * The following struct holds temp offset attributes, which are not available
1726 * in all chips. The following chips support them:
1727 * DME1737, SCH311x
1728 */
1729static struct attribute *dme1737_temp_offset_attr[] = {
1730        &sensor_dev_attr_temp1_offset.dev_attr.attr,
1731        &sensor_dev_attr_temp2_offset.dev_attr.attr,
1732        &sensor_dev_attr_temp3_offset.dev_attr.attr,
1733        NULL
1734};
1735
1736static const struct attribute_group dme1737_temp_offset_group = {
1737        .attrs = dme1737_temp_offset_attr,
1738};
1739
1740/*
1741 * The following struct holds VID related attributes, which are not available
1742 * in all chips. The following chips support them:
1743 * DME1737
1744 */
1745static struct attribute *dme1737_vid_attr[] = {
1746        &dev_attr_vrm.attr,
1747        &dev_attr_cpu0_vid.attr,
1748        NULL
1749};
1750
1751static const struct attribute_group dme1737_vid_group = {
1752        .attrs = dme1737_vid_attr,
1753};
1754
1755/*
1756 * The following struct holds temp zone 3 related attributes, which are not
1757 * available in all chips. The following chips support them:
1758 * DME1737, SCH311x, SCH5027
1759 */
1760static struct attribute *dme1737_zone3_attr[] = {
1761        &sensor_dev_attr_zone3_auto_point1_temp.dev_attr.attr,
1762        &sensor_dev_attr_zone3_auto_point2_temp.dev_attr.attr,
1763        &sensor_dev_attr_zone3_auto_point3_temp.dev_attr.attr,
1764        &sensor_dev_attr_zone3_auto_channels_temp.dev_attr.attr,
1765        NULL
1766};
1767
1768static const struct attribute_group dme1737_zone3_group = {
1769        .attrs = dme1737_zone3_attr,
1770};
1771
1772
1773/*
1774 * The following struct holds temp zone hysteresis related attributes, which
1775 * are not available in all chips. The following chips support them:
1776 * DME1737, SCH311x
1777 */
1778static struct attribute *dme1737_zone_hyst_attr[] = {
1779        &sensor_dev_attr_zone1_auto_point1_temp_hyst.dev_attr.attr,
1780        &sensor_dev_attr_zone2_auto_point1_temp_hyst.dev_attr.attr,
1781        &sensor_dev_attr_zone3_auto_point1_temp_hyst.dev_attr.attr,
1782        NULL
1783};
1784
1785static const struct attribute_group dme1737_zone_hyst_group = {
1786        .attrs = dme1737_zone_hyst_attr,
1787};
1788
1789/*
1790 * The following struct holds voltage in7 related attributes, which
1791 * are not available in all chips. The following chips support them:
1792 * SCH5127
1793 */
1794static struct attribute *dme1737_in7_attr[] = {
1795        &sensor_dev_attr_in7_input.dev_attr.attr,
1796        &sensor_dev_attr_in7_min.dev_attr.attr,
1797        &sensor_dev_attr_in7_max.dev_attr.attr,
1798        &sensor_dev_attr_in7_alarm.dev_attr.attr,
1799        NULL
1800};
1801
1802static const struct attribute_group dme1737_in7_group = {
1803        .attrs = dme1737_in7_attr,
1804};
1805
1806/*
1807 * The following structs hold the PWM attributes, some of which are optional.
1808 * Their creation depends on the chip configuration which is determined during
1809 * module load.
1810 */
1811static struct attribute *dme1737_pwm1_attr[] = {
1812        &sensor_dev_attr_pwm1.dev_attr.attr,
1813        &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1814        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1815        &sensor_dev_attr_pwm1_ramp_rate.dev_attr.attr,
1816        &sensor_dev_attr_pwm1_auto_channels_zone.dev_attr.attr,
1817        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1818        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1819        NULL
1820};
1821static struct attribute *dme1737_pwm2_attr[] = {
1822        &sensor_dev_attr_pwm2.dev_attr.attr,
1823        &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1824        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1825        &sensor_dev_attr_pwm2_ramp_rate.dev_attr.attr,
1826        &sensor_dev_attr_pwm2_auto_channels_zone.dev_attr.attr,
1827        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1828        &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1829        NULL
1830};
1831static struct attribute *dme1737_pwm3_attr[] = {
1832        &sensor_dev_attr_pwm3.dev_attr.attr,
1833        &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1834        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1835        &sensor_dev_attr_pwm3_ramp_rate.dev_attr.attr,
1836        &sensor_dev_attr_pwm3_auto_channels_zone.dev_attr.attr,
1837        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1838        &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1839        NULL
1840};
1841static struct attribute *dme1737_pwm5_attr[] = {
1842        &sensor_dev_attr_pwm5.dev_attr.attr,
1843        &sensor_dev_attr_pwm5_freq.dev_attr.attr,
1844        &sensor_dev_attr_pwm5_enable.dev_attr.attr,
1845        NULL
1846};
1847static struct attribute *dme1737_pwm6_attr[] = {
1848        &sensor_dev_attr_pwm6.dev_attr.attr,
1849        &sensor_dev_attr_pwm6_freq.dev_attr.attr,
1850        &sensor_dev_attr_pwm6_enable.dev_attr.attr,
1851        NULL
1852};
1853
1854static const struct attribute_group dme1737_pwm_group[] = {
1855        { .attrs = dme1737_pwm1_attr },
1856        { .attrs = dme1737_pwm2_attr },
1857        { .attrs = dme1737_pwm3_attr },
1858        { .attrs = NULL },
1859        { .attrs = dme1737_pwm5_attr },
1860        { .attrs = dme1737_pwm6_attr },
1861};
1862
1863/*
1864 * The following struct holds auto PWM min attributes, which are not available
1865 * in all chips. Their creation depends on the chip type which is determined
1866 * during module load.
1867 */
1868static struct attribute *dme1737_auto_pwm_min_attr[] = {
1869        &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1870        &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1871        &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1872};
1873
1874/*
1875 * The following structs hold the fan attributes, some of which are optional.
1876 * Their creation depends on the chip configuration which is determined during
1877 * module load.
1878 */
1879static struct attribute *dme1737_fan1_attr[] = {
1880        &sensor_dev_attr_fan1_input.dev_attr.attr,
1881        &sensor_dev_attr_fan1_min.dev_attr.attr,
1882        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1883        &sensor_dev_attr_fan1_type.dev_attr.attr,
1884        NULL
1885};
1886static struct attribute *dme1737_fan2_attr[] = {
1887        &sensor_dev_attr_fan2_input.dev_attr.attr,
1888        &sensor_dev_attr_fan2_min.dev_attr.attr,
1889        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1890        &sensor_dev_attr_fan2_type.dev_attr.attr,
1891        NULL
1892};
1893static struct attribute *dme1737_fan3_attr[] = {
1894        &sensor_dev_attr_fan3_input.dev_attr.attr,
1895        &sensor_dev_attr_fan3_min.dev_attr.attr,
1896        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1897        &sensor_dev_attr_fan3_type.dev_attr.attr,
1898        NULL
1899};
1900static struct attribute *dme1737_fan4_attr[] = {
1901        &sensor_dev_attr_fan4_input.dev_attr.attr,
1902        &sensor_dev_attr_fan4_min.dev_attr.attr,
1903        &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1904        &sensor_dev_attr_fan4_type.dev_attr.attr,
1905        NULL
1906};
1907static struct attribute *dme1737_fan5_attr[] = {
1908        &sensor_dev_attr_fan5_input.dev_attr.attr,
1909        &sensor_dev_attr_fan5_min.dev_attr.attr,
1910        &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1911        &sensor_dev_attr_fan5_max.dev_attr.attr,
1912        NULL
1913};
1914static struct attribute *dme1737_fan6_attr[] = {
1915        &sensor_dev_attr_fan6_input.dev_attr.attr,
1916        &sensor_dev_attr_fan6_min.dev_attr.attr,
1917        &sensor_dev_attr_fan6_alarm.dev_attr.attr,
1918        &sensor_dev_attr_fan6_max.dev_attr.attr,
1919        NULL
1920};
1921
1922static const struct attribute_group dme1737_fan_group[] = {
1923        { .attrs = dme1737_fan1_attr },
1924        { .attrs = dme1737_fan2_attr },
1925        { .attrs = dme1737_fan3_attr },
1926        { .attrs = dme1737_fan4_attr },
1927        { .attrs = dme1737_fan5_attr },
1928        { .attrs = dme1737_fan6_attr },
1929};
1930
1931/*
1932 * The permissions of the following zone attributes are changed to read-
1933 * writeable if the chip is *not* locked. Otherwise they stay read-only.
1934 */
1935static struct attribute *dme1737_zone_chmod_attr[] = {
1936        &sensor_dev_attr_zone1_auto_point1_temp.dev_attr.attr,
1937        &sensor_dev_attr_zone1_auto_point2_temp.dev_attr.attr,
1938        &sensor_dev_attr_zone1_auto_point3_temp.dev_attr.attr,
1939        &sensor_dev_attr_zone2_auto_point1_temp.dev_attr.attr,
1940        &sensor_dev_attr_zone2_auto_point2_temp.dev_attr.attr,
1941        &sensor_dev_attr_zone2_auto_point3_temp.dev_attr.attr,
1942        NULL
1943};
1944
1945static const struct attribute_group dme1737_zone_chmod_group = {
1946        .attrs = dme1737_zone_chmod_attr,
1947};
1948
1949
1950/*
1951 * The permissions of the following zone 3 attributes are changed to read-
1952 * writeable if the chip is *not* locked. Otherwise they stay read-only.
1953 */
1954static struct attribute *dme1737_zone3_chmod_attr[] = {
1955        &sensor_dev_attr_zone3_auto_point1_temp.dev_attr.attr,
1956        &sensor_dev_attr_zone3_auto_point2_temp.dev_attr.attr,
1957        &sensor_dev_attr_zone3_auto_point3_temp.dev_attr.attr,
1958        NULL
1959};
1960
1961static const struct attribute_group dme1737_zone3_chmod_group = {
1962        .attrs = dme1737_zone3_chmod_attr,
1963};
1964
1965/*
1966 * The permissions of the following PWM attributes are changed to read-
1967 * writeable if the chip is *not* locked and the respective PWM is available.
1968 * Otherwise they stay read-only.
1969 */
1970static struct attribute *dme1737_pwm1_chmod_attr[] = {
1971        &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1972        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1973        &sensor_dev_attr_pwm1_ramp_rate.dev_attr.attr,
1974        &sensor_dev_attr_pwm1_auto_channels_zone.dev_attr.attr,
1975        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1976        NULL
1977};
1978static struct attribute *dme1737_pwm2_chmod_attr[] = {
1979        &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1980        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1981        &sensor_dev_attr_pwm2_ramp_rate.dev_attr.attr,
1982        &sensor_dev_attr_pwm2_auto_channels_zone.dev_attr.attr,
1983        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1984        NULL
1985};
1986static struct attribute *dme1737_pwm3_chmod_attr[] = {
1987        &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1988        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1989        &sensor_dev_attr_pwm3_ramp_rate.dev_attr.attr,
1990        &sensor_dev_attr_pwm3_auto_channels_zone.dev_attr.attr,
1991        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1992        NULL
1993};
1994static struct attribute *dme1737_pwm5_chmod_attr[] = {
1995        &sensor_dev_attr_pwm5.dev_attr.attr,
1996        &sensor_dev_attr_pwm5_freq.dev_attr.attr,
1997        NULL
1998};
1999static struct attribute *dme1737_pwm6_chmod_attr[] = {
2000        &sensor_dev_attr_pwm6.dev_attr.attr,
2001        &sensor_dev_attr_pwm6_freq.dev_attr.attr,
2002        NULL
2003};
2004
2005static const struct attribute_group dme1737_pwm_chmod_group[] = {
2006        { .attrs = dme1737_pwm1_chmod_attr },
2007        { .attrs = dme1737_pwm2_chmod_attr },
2008        { .attrs = dme1737_pwm3_chmod_attr },
2009        { .attrs = NULL },
2010        { .attrs = dme1737_pwm5_chmod_attr },
2011        { .attrs = dme1737_pwm6_chmod_attr },
2012};
2013
2014/*
2015 * Pwm[1-3] are read-writeable if the associated pwm is in manual mode and the
2016 * chip is not locked. Otherwise they are read-only.
2017 */
2018static struct attribute *dme1737_pwm_chmod_attr[] = {
2019        &sensor_dev_attr_pwm1.dev_attr.attr,
2020        &sensor_dev_attr_pwm2.dev_attr.attr,
2021        &sensor_dev_attr_pwm3.dev_attr.attr,
2022};
2023
2024/* ---------------------------------------------------------------------
2025 * Super-IO functions
2026 * --------------------------------------------------------------------- */
2027
2028static inline void dme1737_sio_enter(int sio_cip)
2029{
2030        outb(0x55, sio_cip);
2031}
2032
2033static inline void dme1737_sio_exit(int sio_cip)
2034{
2035        outb(0xaa, sio_cip);
2036}
2037
2038static inline int dme1737_sio_inb(int sio_cip, int reg)
2039{
2040        outb(reg, sio_cip);
2041        return inb(sio_cip + 1);
2042}
2043
2044static inline void dme1737_sio_outb(int sio_cip, int reg, int val)
2045{
2046        outb(reg, sio_cip);
2047        outb(val, sio_cip + 1);
2048}
2049
2050/* ---------------------------------------------------------------------
2051 * Device initialization
2052 * --------------------------------------------------------------------- */
2053
2054static int dme1737_i2c_get_features(int, struct dme1737_data*);
2055
2056static void dme1737_chmod_file(struct device *dev,
2057                               struct attribute *attr, umode_t mode)
2058{
2059        if (sysfs_chmod_file(&dev->kobj, attr, mode)) {
2060                dev_warn(dev, "Failed to change permissions of %s.\n",
2061                         attr->name);
2062        }
2063}
2064
2065static void dme1737_chmod_group(struct device *dev,
2066                                const struct attribute_group *group,
2067                                umode_t mode)
2068{
2069        struct attribute **attr;
2070
2071        for (attr = group->attrs; *attr; attr++)
2072                dme1737_chmod_file(dev, *attr, mode);
2073}
2074
2075static void dme1737_remove_files(struct device *dev)
2076{
2077        struct dme1737_data *data = dev_get_drvdata(dev);
2078        int ix;
2079
2080        for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
2081                if (data->has_features & HAS_FAN(ix)) {
2082                        sysfs_remove_group(&dev->kobj,
2083                                           &dme1737_fan_group[ix]);
2084                }
2085        }
2086
2087        for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_group); ix++) {
2088                if (data->has_features & HAS_PWM(ix)) {
2089                        sysfs_remove_group(&dev->kobj,
2090                                           &dme1737_pwm_group[ix]);
2091                        if ((data->has_features & HAS_PWM_MIN) && ix < 3) {
2092                                sysfs_remove_file(&dev->kobj,
2093                                                dme1737_auto_pwm_min_attr[ix]);
2094                        }
2095                }
2096        }
2097
2098        if (data->has_features & HAS_TEMP_OFFSET)
2099                sysfs_remove_group(&dev->kobj, &dme1737_temp_offset_group);
2100        if (data->has_features & HAS_VID)
2101                sysfs_remove_group(&dev->kobj, &dme1737_vid_group);
2102        if (data->has_features & HAS_ZONE3)
2103                sysfs_remove_group(&dev->kobj, &dme1737_zone3_group);
2104        if (data->has_features & HAS_ZONE_HYST)
2105                sysfs_remove_group(&dev->kobj, &dme1737_zone_hyst_group);
2106        if (data->has_features & HAS_IN7)
2107                sysfs_remove_group(&dev->kobj, &dme1737_in7_group);
2108        sysfs_remove_group(&dev->kobj, &dme1737_group);
2109
2110        if (!data->client)
2111                sysfs_remove_file(&dev->kobj, &dev_attr_name.attr);
2112}
2113
2114static int dme1737_create_files(struct device *dev)
2115{
2116        struct dme1737_data *data = dev_get_drvdata(dev);
2117        int err, ix;
2118
2119        /* Create a name attribute for ISA devices */
2120        if (!data->client) {
2121                err = sysfs_create_file(&dev->kobj, &dev_attr_name.attr);
2122                if (err)
2123                        goto exit;
2124        }
2125
2126        /* Create standard sysfs attributes */
2127        err = sysfs_create_group(&dev->kobj, &dme1737_group);
2128        if (err)
2129                goto exit_remove;
2130
2131        /* Create chip-dependent sysfs attributes */
2132        if (data->has_features & HAS_TEMP_OFFSET) {
2133                err = sysfs_create_group(&dev->kobj,
2134                                         &dme1737_temp_offset_group);
2135                if (err)
2136                        goto exit_remove;
2137        }
2138        if (data->has_features & HAS_VID) {
2139                err = sysfs_create_group(&dev->kobj, &dme1737_vid_group);
2140                if (err)
2141                        goto exit_remove;
2142        }
2143        if (data->has_features & HAS_ZONE3) {
2144                err = sysfs_create_group(&dev->kobj, &dme1737_zone3_group);
2145                if (err)
2146                        goto exit_remove;
2147        }
2148        if (data->has_features & HAS_ZONE_HYST) {
2149                err = sysfs_create_group(&dev->kobj, &dme1737_zone_hyst_group);
2150                if (err)
2151                        goto exit_remove;
2152        }
2153        if (data->has_features & HAS_IN7) {
2154                err = sysfs_create_group(&dev->kobj, &dme1737_in7_group);
2155                if (err)
2156                        goto exit_remove;
2157        }
2158
2159        /* Create fan sysfs attributes */
2160        for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
2161                if (data->has_features & HAS_FAN(ix)) {
2162                        err = sysfs_create_group(&dev->kobj,
2163                                                 &dme1737_fan_group[ix]);
2164                        if (err)
2165                                goto exit_remove;
2166                }
2167        }
2168
2169        /* Create PWM sysfs attributes */
2170        for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_group); ix++) {
2171                if (data->has_features & HAS_PWM(ix)) {
2172                        err = sysfs_create_group(&dev->kobj,
2173                                                 &dme1737_pwm_group[ix]);
2174                        if (err)
2175                                goto exit_remove;
2176                        if ((data->has_features & HAS_PWM_MIN) && (ix < 3)) {
2177                                err = sysfs_create_file(&dev->kobj,
2178                                                dme1737_auto_pwm_min_attr[ix]);
2179                                if (err)
2180                                        goto exit_remove;
2181                        }
2182                }
2183        }
2184
2185        /*
2186         * Inform if the device is locked. Otherwise change the permissions of
2187         * selected attributes from read-only to read-writeable.
2188         */
2189        if (data->config & 0x02) {
2190                dev_info(dev,
2191                         "Device is locked. Some attributes will be read-only.\n");
2192        } else {
2193                /* Change permissions of zone sysfs attributes */
2194                dme1737_chmod_group(dev, &dme1737_zone_chmod_group,
2195                                    S_IRUGO | S_IWUSR);
2196
2197                /* Change permissions of chip-dependent sysfs attributes */
2198                if (data->has_features & HAS_TEMP_OFFSET) {
2199                        dme1737_chmod_group(dev, &dme1737_temp_offset_group,
2200                                            S_IRUGO | S_IWUSR);
2201                }
2202                if (data->has_features & HAS_ZONE3) {
2203                        dme1737_chmod_group(dev, &dme1737_zone3_chmod_group,
2204                                            S_IRUGO | S_IWUSR);
2205                }
2206                if (data->has_features & HAS_ZONE_HYST) {
2207                        dme1737_chmod_group(dev, &dme1737_zone_hyst_group,
2208                                            S_IRUGO | S_IWUSR);
2209                }
2210
2211                /* Change permissions of PWM sysfs attributes */
2212                for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_chmod_group); ix++) {
2213                        if (data->has_features & HAS_PWM(ix)) {
2214                                dme1737_chmod_group(dev,
2215                                                &dme1737_pwm_chmod_group[ix],
2216                                                S_IRUGO | S_IWUSR);
2217                                if ((data->has_features & HAS_PWM_MIN) &&
2218                                    ix < 3) {
2219                                        dme1737_chmod_file(dev,
2220                                                dme1737_auto_pwm_min_attr[ix],
2221                                                S_IRUGO | S_IWUSR);
2222                                }
2223                        }
2224                }
2225
2226                /* Change permissions of pwm[1-3] if in manual mode */
2227                for (ix = 0; ix < 3; ix++) {
2228                        if ((data->has_features & HAS_PWM(ix)) &&
2229                            (PWM_EN_FROM_REG(data->pwm_config[ix]) == 1)) {
2230                                dme1737_chmod_file(dev,
2231                                                dme1737_pwm_chmod_attr[ix],
2232                                                S_IRUGO | S_IWUSR);
2233                        }
2234                }
2235        }
2236
2237        return 0;
2238
2239exit_remove:
2240        dme1737_remove_files(dev);
2241exit:
2242        return err;
2243}
2244
2245static int dme1737_init_device(struct device *dev)
2246{
2247        struct dme1737_data *data = dev_get_drvdata(dev);
2248        struct i2c_client *client = data->client;
2249        int ix;
2250        u8 reg;
2251
2252        /* Point to the right nominal voltages array */
2253        data->in_nominal = IN_NOMINAL(data->type);
2254
2255        data->config = dme1737_read(data, DME1737_REG_CONFIG);
2256        /* Inform if part is not monitoring/started */
2257        if (!(data->config & 0x01)) {
2258                if (!force_start) {
2259                        dev_err(dev,
2260                                "Device is not monitoring. Use the force_start load parameter to override.\n");
2261                        return -EFAULT;
2262                }
2263
2264                /* Force monitoring */
2265                data->config |= 0x01;
2266                dme1737_write(data, DME1737_REG_CONFIG, data->config);
2267        }
2268        /* Inform if part is not ready */
2269        if (!(data->config & 0x04)) {
2270                dev_err(dev, "Device is not ready.\n");
2271                return -EFAULT;
2272        }
2273
2274        /*
2275         * Determine which optional fan and pwm features are enabled (only
2276         * valid for I2C devices)
2277         */
2278        if (client) {   /* I2C chip */
2279                data->config2 = dme1737_read(data, DME1737_REG_CONFIG2);
2280                /* Check if optional fan3 input is enabled */
2281                if (data->config2 & 0x04)
2282                        data->has_features |= HAS_FAN(2);
2283
2284                /*
2285                 * Fan4 and pwm3 are only available if the client's I2C address
2286                 * is the default 0x2e. Otherwise the I/Os associated with
2287                 * these functions are used for addr enable/select.
2288                 */
2289                if (client->addr == 0x2e)
2290                        data->has_features |= HAS_FAN(3) | HAS_PWM(2);
2291
2292                /*
2293                 * Determine which of the optional fan[5-6] and pwm[5-6]
2294                 * features are enabled. For this, we need to query the runtime
2295                 * registers through the Super-IO LPC interface. Try both
2296                 * config ports 0x2e and 0x4e.
2297                 */
2298                if (dme1737_i2c_get_features(0x2e, data) &&
2299                    dme1737_i2c_get_features(0x4e, data)) {
2300                        dev_warn(dev,
2301                                 "Failed to query Super-IO for optional features.\n");
2302                }
2303        }
2304
2305        /* Fan[1-2] and pwm[1-2] are present in all chips */
2306        data->has_features |= HAS_FAN(0) | HAS_FAN(1) | HAS_PWM(0) | HAS_PWM(1);
2307
2308        /* Chip-dependent features */
2309        switch (data->type) {
2310        case dme1737:
2311                data->has_features |= HAS_TEMP_OFFSET | HAS_VID | HAS_ZONE3 |
2312                        HAS_ZONE_HYST | HAS_PWM_MIN;
2313                break;
2314        case sch311x:
2315                data->has_features |= HAS_TEMP_OFFSET | HAS_ZONE3 |
2316                        HAS_ZONE_HYST | HAS_PWM_MIN | HAS_FAN(2) | HAS_PWM(2);
2317                break;
2318        case sch5027:
2319                data->has_features |= HAS_ZONE3;
2320                break;
2321        case sch5127:
2322                data->has_features |= HAS_FAN(2) | HAS_PWM(2) | HAS_IN7;
2323                break;
2324        default:
2325                break;
2326        }
2327
2328        dev_info(dev,
2329                 "Optional features: pwm3=%s, pwm5=%s, pwm6=%s, fan3=%s, fan4=%s, fan5=%s, fan6=%s.\n",
2330                 (data->has_features & HAS_PWM(2)) ? "yes" : "no",
2331                 (data->has_features & HAS_PWM(4)) ? "yes" : "no",
2332                 (data->has_features & HAS_PWM(5)) ? "yes" : "no",
2333                 (data->has_features & HAS_FAN(2)) ? "yes" : "no",
2334                 (data->has_features & HAS_FAN(3)) ? "yes" : "no",
2335                 (data->has_features & HAS_FAN(4)) ? "yes" : "no",
2336                 (data->has_features & HAS_FAN(5)) ? "yes" : "no");
2337
2338        reg = dme1737_read(data, DME1737_REG_TACH_PWM);
2339        /* Inform if fan-to-pwm mapping differs from the default */
2340        if (client && reg != 0xa4) {   /* I2C chip */
2341                dev_warn(dev,
2342                         "Non-standard fan to pwm mapping: fan1->pwm%d, fan2->pwm%d, fan3->pwm%d, fan4->pwm%d. %s\n",
2343                         (reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
2344                         ((reg >> 4) & 0x03) + 1, ((reg >> 6) & 0x03) + 1,
2345                         DO_REPORT);
2346        } else if (!client && reg != 0x24) {   /* ISA chip */
2347                dev_warn(dev,
2348                         "Non-standard fan to pwm mapping: fan1->pwm%d, fan2->pwm%d, fan3->pwm%d. %s\n",
2349                         (reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
2350                         ((reg >> 4) & 0x03) + 1, DO_REPORT);
2351        }
2352
2353        /*
2354         * Switch pwm[1-3] to manual mode if they are currently disabled and
2355         * set the duty-cycles to 0% (which is identical to the PWMs being
2356         * disabled).
2357         */
2358        if (!(data->config & 0x02)) {
2359                for (ix = 0; ix < 3; ix++) {
2360                        data->pwm_config[ix] = dme1737_read(data,
2361                                                DME1737_REG_PWM_CONFIG(ix));
2362                        if ((data->has_features & HAS_PWM(ix)) &&
2363                            (PWM_EN_FROM_REG(data->pwm_config[ix]) == -1)) {
2364                                dev_info(dev,
2365                                         "Switching pwm%d to manual mode.\n",
2366                                         ix + 1);
2367                                data->pwm_config[ix] = PWM_EN_TO_REG(1,
2368                                                        data->pwm_config[ix]);
2369                                dme1737_write(data, DME1737_REG_PWM(ix), 0);
2370                                dme1737_write(data,
2371                                              DME1737_REG_PWM_CONFIG(ix),
2372                                              data->pwm_config[ix]);
2373                        }
2374                }
2375        }
2376
2377        /* Initialize the default PWM auto channels zone (acz) assignments */
2378        data->pwm_acz[0] = 1;   /* pwm1 -> zone1 */
2379        data->pwm_acz[1] = 2;   /* pwm2 -> zone2 */
2380        data->pwm_acz[2] = 4;   /* pwm3 -> zone3 */
2381
2382        /* Set VRM */
2383        if (data->has_features & HAS_VID)
2384                data->vrm = vid_which_vrm();
2385
2386        return 0;
2387}
2388
2389/* ---------------------------------------------------------------------
2390 * I2C device detection and registration
2391 * --------------------------------------------------------------------- */
2392
2393static struct i2c_driver dme1737_i2c_driver;
2394
2395static int dme1737_i2c_get_features(int sio_cip, struct dme1737_data *data)
2396{
2397        int err = 0, reg;
2398        u16 addr;
2399
2400        dme1737_sio_enter(sio_cip);
2401
2402        /*
2403         * Check device ID
2404         * We currently know about two kinds of DME1737 and SCH5027.
2405         */
2406        reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
2407        if (!(reg == DME1737_ID_1 || reg == DME1737_ID_2 ||
2408              reg == SCH5027_ID)) {
2409                err = -ENODEV;
2410                goto exit;
2411        }
2412
2413        /* Select logical device A (runtime registers) */
2414        dme1737_sio_outb(sio_cip, 0x07, 0x0a);
2415
2416        /* Get the base address of the runtime registers */
2417        addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
2418                dme1737_sio_inb(sio_cip, 0x61);
2419        if (!addr) {
2420                err = -ENODEV;
2421                goto exit;
2422        }
2423
2424        /*
2425         * Read the runtime registers to determine which optional features
2426         * are enabled and available. Bits [3:2] of registers 0x43-0x46 are set
2427         * to '10' if the respective feature is enabled.
2428         */
2429        if ((inb(addr + 0x43) & 0x0c) == 0x08) /* fan6 */
2430                data->has_features |= HAS_FAN(5);
2431        if ((inb(addr + 0x44) & 0x0c) == 0x08) /* pwm6 */
2432                data->has_features |= HAS_PWM(5);
2433        if ((inb(addr + 0x45) & 0x0c) == 0x08) /* fan5 */
2434                data->has_features |= HAS_FAN(4);
2435        if ((inb(addr + 0x46) & 0x0c) == 0x08) /* pwm5 */
2436                data->has_features |= HAS_PWM(4);
2437
2438exit:
2439        dme1737_sio_exit(sio_cip);
2440
2441        return err;
2442}
2443
2444/* Return 0 if detection is successful, -ENODEV otherwise */
2445static int dme1737_i2c_detect(struct i2c_client *client,
2446                              struct i2c_board_info *info)
2447{
2448        struct i2c_adapter *adapter = client->adapter;
2449        struct device *dev = &adapter->dev;
2450        u8 company, verstep = 0;
2451        const char *name;
2452
2453        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
2454                return -ENODEV;
2455
2456        company = i2c_smbus_read_byte_data(client, DME1737_REG_COMPANY);
2457        verstep = i2c_smbus_read_byte_data(client, DME1737_REG_VERSTEP);
2458
2459        if (company == DME1737_COMPANY_SMSC &&
2460            verstep == SCH5027_VERSTEP) {
2461                name = "sch5027";
2462        } else if (company == DME1737_COMPANY_SMSC &&
2463                   (verstep & DME1737_VERSTEP_MASK) == DME1737_VERSTEP) {
2464                name = "dme1737";
2465        } else {
2466                return -ENODEV;
2467        }
2468
2469        dev_info(dev, "Found a %s chip at 0x%02x (rev 0x%02x).\n",
2470                 verstep == SCH5027_VERSTEP ? "SCH5027" : "DME1737",
2471                 client->addr, verstep);
2472        strlcpy(info->type, name, I2C_NAME_SIZE);
2473
2474        return 0;
2475}
2476
2477static int dme1737_i2c_probe(struct i2c_client *client,
2478                             const struct i2c_device_id *id)
2479{
2480        struct dme1737_data *data;
2481        struct device *dev = &client->dev;
2482        int err;
2483
2484        data = devm_kzalloc(dev, sizeof(struct dme1737_data), GFP_KERNEL);
2485        if (!data)
2486                return -ENOMEM;
2487
2488        i2c_set_clientdata(client, data);
2489        data->type = id->driver_data;
2490        data->client = client;
2491        data->name = client->name;
2492        mutex_init(&data->update_lock);
2493
2494        /* Initialize the DME1737 chip */
2495        err = dme1737_init_device(dev);
2496        if (err) {
2497                dev_err(dev, "Failed to initialize device.\n");
2498                return err;
2499        }
2500
2501        /* Create sysfs files */
2502        err = dme1737_create_files(dev);
2503        if (err) {
2504                dev_err(dev, "Failed to create sysfs files.\n");
2505                return err;
2506        }
2507
2508        /* Register device */
2509        data->hwmon_dev = hwmon_device_register(dev);
2510        if (IS_ERR(data->hwmon_dev)) {
2511                dev_err(dev, "Failed to register device.\n");
2512                err = PTR_ERR(data->hwmon_dev);
2513                goto exit_remove;
2514        }
2515
2516        return 0;
2517
2518exit_remove:
2519        dme1737_remove_files(dev);
2520        return err;
2521}
2522
2523static int dme1737_i2c_remove(struct i2c_client *client)
2524{
2525        struct dme1737_data *data = i2c_get_clientdata(client);
2526
2527        hwmon_device_unregister(data->hwmon_dev);
2528        dme1737_remove_files(&client->dev);
2529
2530        return 0;
2531}
2532
2533static const struct i2c_device_id dme1737_id[] = {
2534        { "dme1737", dme1737 },
2535        { "sch5027", sch5027 },
2536        { }
2537};
2538MODULE_DEVICE_TABLE(i2c, dme1737_id);
2539
2540static struct i2c_driver dme1737_i2c_driver = {
2541        .class = I2C_CLASS_HWMON,
2542        .driver = {
2543                .name = "dme1737",
2544        },
2545        .probe = dme1737_i2c_probe,
2546        .remove = dme1737_i2c_remove,
2547        .id_table = dme1737_id,
2548        .detect = dme1737_i2c_detect,
2549        .address_list = normal_i2c,
2550};
2551
2552/* ---------------------------------------------------------------------
2553 * ISA device detection and registration
2554 * --------------------------------------------------------------------- */
2555
2556static int __init dme1737_isa_detect(int sio_cip, unsigned short *addr)
2557{
2558        int err = 0, reg;
2559        unsigned short base_addr;
2560
2561        dme1737_sio_enter(sio_cip);
2562
2563        /*
2564         * Check device ID
2565         * We currently know about SCH3112, SCH3114, SCH3116, and SCH5127
2566         */
2567        reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
2568        if (!(reg == SCH3112_ID || reg == SCH3114_ID || reg == SCH3116_ID ||
2569              reg == SCH5127_ID)) {
2570                err = -ENODEV;
2571                goto exit;
2572        }
2573
2574        /* Select logical device A (runtime registers) */
2575        dme1737_sio_outb(sio_cip, 0x07, 0x0a);
2576
2577        /* Get the base address of the runtime registers */
2578        base_addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
2579                     dme1737_sio_inb(sio_cip, 0x61);
2580        if (!base_addr) {
2581                pr_err("Base address not set\n");
2582                err = -ENODEV;
2583                goto exit;
2584        }
2585
2586        /*
2587         * Access to the hwmon registers is through an index/data register
2588         * pair located at offset 0x70/0x71.
2589         */
2590        *addr = base_addr + 0x70;
2591
2592exit:
2593        dme1737_sio_exit(sio_cip);
2594        return err;
2595}
2596
2597static int __init dme1737_isa_device_add(unsigned short addr)
2598{
2599        struct resource res = {
2600                .start  = addr,
2601                .end    = addr + DME1737_EXTENT - 1,
2602                .name   = "dme1737",
2603                .flags  = IORESOURCE_IO,
2604        };
2605        int err;
2606
2607        err = acpi_check_resource_conflict(&res);
2608        if (err)
2609                goto exit;
2610
2611        pdev = platform_device_alloc("dme1737", addr);
2612        if (!pdev) {
2613                pr_err("Failed to allocate device\n");
2614                err = -ENOMEM;
2615                goto exit;
2616        }
2617
2618        err = platform_device_add_resources(pdev, &res, 1);
2619        if (err) {
2620                pr_err("Failed to add device resource (err = %d)\n", err);
2621                goto exit_device_put;
2622        }
2623
2624        err = platform_device_add(pdev);
2625        if (err) {
2626                pr_err("Failed to add device (err = %d)\n", err);
2627                goto exit_device_put;
2628        }
2629
2630        return 0;
2631
2632exit_device_put:
2633        platform_device_put(pdev);
2634        pdev = NULL;
2635exit:
2636        return err;
2637}
2638
2639static int dme1737_isa_probe(struct platform_device *pdev)
2640{
2641        u8 company, device;
2642        struct resource *res;
2643        struct dme1737_data *data;
2644        struct device *dev = &pdev->dev;
2645        int err;
2646
2647        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2648        if (!devm_request_region(dev, res->start, DME1737_EXTENT, "dme1737")) {
2649                dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
2650                        (unsigned short)res->start,
2651                        (unsigned short)res->start + DME1737_EXTENT - 1);
2652                return -EBUSY;
2653        }
2654
2655        data = devm_kzalloc(dev, sizeof(struct dme1737_data), GFP_KERNEL);
2656        if (!data)
2657                return -ENOMEM;
2658
2659        data->addr = res->start;
2660        platform_set_drvdata(pdev, data);
2661
2662        /* Skip chip detection if module is loaded with force_id parameter */
2663        switch (force_id) {
2664        case SCH3112_ID:
2665        case SCH3114_ID:
2666        case SCH3116_ID:
2667                data->type = sch311x;
2668                break;
2669        case SCH5127_ID:
2670                data->type = sch5127;
2671                break;
2672        default:
2673                company = dme1737_read(data, DME1737_REG_COMPANY);
2674                device = dme1737_read(data, DME1737_REG_DEVICE);
2675
2676                if ((company == DME1737_COMPANY_SMSC) &&
2677                    (device == SCH311X_DEVICE)) {
2678                        data->type = sch311x;
2679                } else if ((company == DME1737_COMPANY_SMSC) &&
2680                           (device == SCH5127_DEVICE)) {
2681                        data->type = sch5127;
2682                } else {
2683                        return -ENODEV;
2684                }
2685        }
2686
2687        if (data->type == sch5127)
2688                data->name = "sch5127";
2689        else
2690                data->name = "sch311x";
2691
2692        /* Initialize the mutex */
2693        mutex_init(&data->update_lock);
2694
2695        dev_info(dev, "Found a %s chip at 0x%04x\n",
2696                 data->type == sch5127 ? "SCH5127" : "SCH311x", data->addr);
2697
2698        /* Initialize the chip */
2699        err = dme1737_init_device(dev);
2700        if (err) {
2701                dev_err(dev, "Failed to initialize device.\n");
2702                return err;
2703        }
2704
2705        /* Create sysfs files */
2706        err = dme1737_create_files(dev);
2707        if (err) {
2708                dev_err(dev, "Failed to create sysfs files.\n");
2709                return err;
2710        }
2711
2712        /* Register device */
2713        data->hwmon_dev = hwmon_device_register(dev);
2714        if (IS_ERR(data->hwmon_dev)) {
2715                dev_err(dev, "Failed to register device.\n");
2716                err = PTR_ERR(data->hwmon_dev);
2717                goto exit_remove_files;
2718        }
2719
2720        return 0;
2721
2722exit_remove_files:
2723        dme1737_remove_files(dev);
2724        return err;
2725}
2726
2727static int dme1737_isa_remove(struct platform_device *pdev)
2728{
2729        struct dme1737_data *data = platform_get_drvdata(pdev);
2730
2731        hwmon_device_unregister(data->hwmon_dev);
2732        dme1737_remove_files(&pdev->dev);
2733
2734        return 0;
2735}
2736
2737static struct platform_driver dme1737_isa_driver = {
2738        .driver = {
2739                .name = "dme1737",
2740        },
2741        .probe = dme1737_isa_probe,
2742        .remove = dme1737_isa_remove,
2743};
2744
2745/* ---------------------------------------------------------------------
2746 * Module initialization and cleanup
2747 * --------------------------------------------------------------------- */
2748
2749static int __init dme1737_init(void)
2750{
2751        int err;
2752        unsigned short addr;
2753
2754        err = i2c_add_driver(&dme1737_i2c_driver);
2755        if (err)
2756                goto exit;
2757
2758        if (dme1737_isa_detect(0x2e, &addr) &&
2759            dme1737_isa_detect(0x4e, &addr) &&
2760            (!probe_all_addr ||
2761             (dme1737_isa_detect(0x162e, &addr) &&
2762              dme1737_isa_detect(0x164e, &addr)))) {
2763                /* Return 0 if we didn't find an ISA device */
2764                return 0;
2765        }
2766
2767        err = platform_driver_register(&dme1737_isa_driver);
2768        if (err)
2769                goto exit_del_i2c_driver;
2770
2771        /* Sets global pdev as a side effect */
2772        err = dme1737_isa_device_add(addr);
2773        if (err)
2774                goto exit_del_isa_driver;
2775
2776        return 0;
2777
2778exit_del_isa_driver:
2779        platform_driver_unregister(&dme1737_isa_driver);
2780exit_del_i2c_driver:
2781        i2c_del_driver(&dme1737_i2c_driver);
2782exit:
2783        return err;
2784}
2785
2786static void __exit dme1737_exit(void)
2787{
2788        if (pdev) {
2789                platform_device_unregister(pdev);
2790                platform_driver_unregister(&dme1737_isa_driver);
2791        }
2792
2793        i2c_del_driver(&dme1737_i2c_driver);
2794}
2795
2796MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
2797MODULE_DESCRIPTION("DME1737 sensors");
2798MODULE_LICENSE("GPL");
2799
2800module_init(dme1737_init);
2801module_exit(dme1737_exit);
2802