drivers/hwmon/gl518sm.c

   1 /*
   2  * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *             monitoring
   4  * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
   5  * Kyosti Malkki <kmalkki@cc.hut.fi>
   6  * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and
   7  * Jean Delvare <jdelvare@suse.de>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
  24  * and advice of Greg Kroah-Hartman.
  25  *
  26  * Notes about the port:
  27  * Release 0x00 of the GL518SM chipset doesn't support reading of in0,
  28  * in1 nor in2. The original driver had an ugly workaround to get them
  29  * anyway (changing limits and watching alarms trigger and wear off).
  30  * We did not keep that part of the original driver in the Linux 2.6
  31  * version, since it was making the driver significantly more complex
  32  * with no real benefit.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/slab.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/i2c.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/hwmon-sysfs.h>
  42 #include <linux/err.h>
  43 #include <linux/mutex.h>
  44 #include <linux/sysfs.h>
  45
  46 /* Addresses to scan */
  47 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  48
  49 enum chips { gl518sm_r00, gl518sm_r80 };
  50
  51 /* Many GL518 constants specified below */
  52
  53 /* The GL518 registers */
  54 #define GL518_REG_CHIP_ID       0x00
  55 #define GL518_REG_REVISION      0x01
  56 #define GL518_REG_VENDOR_ID     0x02
  57 #define GL518_REG_CONF          0x03
  58 #define GL518_REG_TEMP_IN       0x04
  59 #define GL518_REG_TEMP_MAX      0x05
  60 #define GL518_REG_TEMP_HYST     0x06
  61 #define GL518_REG_FAN_COUNT     0x07
  62 #define GL518_REG_FAN_LIMIT     0x08
  63 #define GL518_REG_VIN1_LIMIT    0x09
  64 #define GL518_REG_VIN2_LIMIT    0x0a
  65 #define GL518_REG_VIN3_LIMIT    0x0b
  66 #define GL518_REG_VDD_LIMIT     0x0c
  67 #define GL518_REG_VIN3          0x0d
  68 #define GL518_REG_MISC          0x0f
  69 #define GL518_REG_ALARM         0x10
  70 #define GL518_REG_MASK          0x11
  71 #define GL518_REG_INT           0x12
  72 #define GL518_REG_VIN2          0x13
  73 #define GL518_REG_VIN1          0x14
  74 #define GL518_REG_VDD           0x15
  75
  76
  77 /*
  78  * Conversions. Rounding and limit checking is only done on the TO_REG
  79  * variants. Note that you should be a bit careful with which arguments
  80  * these macros are called: arguments may be evaluated more than once.
  81  * Fixing this is just not worth it.
  82  */
  83
  84 #define RAW_FROM_REG(val)       val
  85
  86 #define BOOL_FROM_REG(val)      ((val) ? 0 : 1)
  87 #define BOOL_TO_REG(val)        ((val) ? 0 : 1)
  88
  89 #define TEMP_CLAMP(val)         clamp_val(val, -119000, 136000)
  90 #define TEMP_TO_REG(val)        (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 119)
  91 #define TEMP_FROM_REG(val)      (((val) - 119) * 1000)
  92
  93 static inline u8 FAN_TO_REG(long rpm, int div)
  94 {
  95         long rpmdiv;
  96         if (rpm == 0)
  97                 return 0;
  98         rpmdiv = clamp_val(rpm, 1, 960000) * div;
  99         return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
 100 }
 101 #define FAN_FROM_REG(val, div)  ((val) == 0 ? 0 : (480000 / ((val) * (div))))
 102
 103 #define IN_CLAMP(val)           clamp_val(val, 0, 255 * 19)
 104 #define IN_TO_REG(val)          DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
 105 #define IN_FROM_REG(val)        ((val) * 19)
 106
 107 #define VDD_CLAMP(val)          clamp_val(val, 0, 255 * 95 / 4)
 108 #define VDD_TO_REG(val)         DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
 109 #define VDD_FROM_REG(val)       DIV_ROUND_CLOSEST((val) * 95, 4)
 110
 111 #define DIV_FROM_REG(val)       (1 << (val))
 112
 113 #define BEEP_MASK_TO_REG(val)   ((val) & 0x7f & data->alarm_mask)
 114 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
 115
 116 /* Each client has this additional data */
 117 struct gl518_data {
 118         struct i2c_client *client;
 119         const struct attribute_group *groups[3];
 120         enum chips type;
 121
 122         struct mutex update_lock;
 123         char valid;             /* !=0 if following fields are valid */
 124         unsigned long last_updated;     /* In jiffies */
 125
 126         u8 voltage_in[4];       /* Register values; [0] = VDD */
 127         u8 voltage_min[4];      /* Register values; [0] = VDD */
 128         u8 voltage_max[4];      /* Register values; [0] = VDD */
 129         u8 fan_in[2];
 130         u8 fan_min[2];
 131         u8 fan_div[2];          /* Register encoding, shifted right */
 132         u8 fan_auto1;           /* Boolean */
 133         u8 temp_in;             /* Register values */
 134         u8 temp_max;            /* Register values */
 135         u8 temp_hyst;           /* Register values */
 136         u8 alarms;              /* Register value */
 137         u8 alarm_mask;
 138         u8 beep_mask;           /* Register value */
 139         u8 beep_enable;         /* Boolean */
 140 };
 141
 142 /*
 143  * Registers 0x07 to 0x0c are word-sized, others are byte-sized
 144  * GL518 uses a high-byte first convention, which is exactly opposite to
 145  * the SMBus standard.
 146  */
 147 static int gl518_read_value(struct i2c_client *client, u8 reg)
 148 {
 149         if ((reg >= 0x07) && (reg <= 0x0c))
 150                 return i2c_smbus_read_word_swapped(client, reg);
 151         else
 152                 return i2c_smbus_read_byte_data(client, reg);
 153 }
 154
 155 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
 156 {
 157         if ((reg >= 0x07) && (reg <= 0x0c))
 158                 return i2c_smbus_write_word_swapped(client, reg, value);
 159         else
 160                 return i2c_smbus_write_byte_data(client, reg, value);
 161 }
 162
 163 static struct gl518_data *gl518_update_device(struct device *dev)
 164 {
 165         struct gl518_data *data = dev_get_drvdata(dev);
 166         struct i2c_client *client = data->client;
 167         int val;
 168
 169         mutex_lock(&data->update_lock);
 170
 171         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 172             || !data->valid) {
 173                 dev_dbg(&client->dev, "Starting gl518 update\n");
 174
 175                 data->alarms = gl518_read_value(client, GL518_REG_INT);
 176                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 177
 178                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
 179                 data->voltage_min[0] = val & 0xff;
 180                 data->voltage_max[0] = (val >> 8) & 0xff;
 181                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
 182                 data->voltage_min[1] = val & 0xff;
 183                 data->voltage_max[1] = (val >> 8) & 0xff;
 184                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
 185                 data->voltage_min[2] = val & 0xff;
 186                 data->voltage_max[2] = (val >> 8) & 0xff;
 187                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
 188                 data->voltage_min[3] = val & 0xff;
 189                 data->voltage_max[3] = (val >> 8) & 0xff;
 190
 191                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
 192                 data->fan_in[0] = (val >> 8) & 0xff;
 193                 data->fan_in[1] = val & 0xff;
 194
 195                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 196                 data->fan_min[0] = (val >> 8) & 0xff;
 197                 data->fan_min[1] = val & 0xff;
 198
 199                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
 200                 data->temp_max =
 201                     gl518_read_value(client, GL518_REG_TEMP_MAX);
 202                 data->temp_hyst =
 203                     gl518_read_value(client, GL518_REG_TEMP_HYST);
 204
 205                 val = gl518_read_value(client, GL518_REG_MISC);
 206                 data->fan_div[0] = (val >> 6) & 0x03;
 207                 data->fan_div[1] = (val >> 4) & 0x03;
 208                 data->fan_auto1  = (val >> 3) & 0x01;
 209
 210                 data->alarms &= data->alarm_mask;
 211
 212                 val = gl518_read_value(client, GL518_REG_CONF);
 213                 data->beep_enable = (val >> 2) & 1;
 214
 215                 if (data->type != gl518sm_r00) {
 216                         data->voltage_in[0] =
 217                             gl518_read_value(client, GL518_REG_VDD);
 218                         data->voltage_in[1] =
 219                             gl518_read_value(client, GL518_REG_VIN1);
 220                         data->voltage_in[2] =
 221                             gl518_read_value(client, GL518_REG_VIN2);
 222                 }
 223                 data->voltage_in[3] =
 224                     gl518_read_value(client, GL518_REG_VIN3);
 225
 226                 data->last_updated = jiffies;
 227                 data->valid = 1;
 228         }
 229
 230         mutex_unlock(&data->update_lock);
 231
 232         return data;
 233 }
 234
 235 /*
 236  * Sysfs stuff
 237  */
 238
 239 #define show(type, suffix, value)                                       \
 240 static ssize_t show_##suffix(struct device *dev,                        \
 241                              struct device_attribute *attr, char *buf)  \
 242 {                                                                       \
 243         struct gl518_data *data = gl518_update_device(dev);             \
 244         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
 245 }
 246
 247 show(TEMP, temp_input1, temp_in);
 248 show(TEMP, temp_max1, temp_max);
 249 show(TEMP, temp_hyst1, temp_hyst);
 250 show(BOOL, fan_auto1, fan_auto1);
 251 show(VDD, in_input0, voltage_in[0]);
 252 show(IN, in_input1, voltage_in[1]);
 253 show(IN, in_input2, voltage_in[2]);
 254 show(IN, in_input3, voltage_in[3]);
 255 show(VDD, in_min0, voltage_min[0]);
 256 show(IN, in_min1, voltage_min[1]);
 257 show(IN, in_min2, voltage_min[2]);
 258 show(IN, in_min3, voltage_min[3]);
 259 show(VDD, in_max0, voltage_max[0]);
 260 show(IN, in_max1, voltage_max[1]);
 261 show(IN, in_max2, voltage_max[2]);
 262 show(IN, in_max3, voltage_max[3]);
 263 show(RAW, alarms, alarms);
 264 show(BOOL, beep_enable, beep_enable);
 265 show(BEEP_MASK, beep_mask, beep_mask);
 266
 267 static ssize_t fan_input_show(struct device *dev,
 268                               struct device_attribute *attr, char *buf)
 269 {
 270         int nr = to_sensor_dev_attr(attr)->index;
 271         struct gl518_data *data = gl518_update_device(dev);
 272         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
 273                                         DIV_FROM_REG(data->fan_div[nr])));
 274 }
 275
 276 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
 277                             char *buf)
 278 {
 279         int nr = to_sensor_dev_attr(attr)->index;
 280         struct gl518_data *data = gl518_update_device(dev);
 281         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 282                                         DIV_FROM_REG(data->fan_div[nr])));
 283 }
 284
 285 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
 286                             char *buf)
 287 {
 288         int nr = to_sensor_dev_attr(attr)->index;
 289         struct gl518_data *data = gl518_update_device(dev);
 290         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 291 }
 292
 293 #define set(type, suffix, value, reg)                                   \
 294 static ssize_t set_##suffix(struct device *dev,                         \
 295                             struct device_attribute *attr,              \
 296                             const char *buf, size_t count)              \
 297 {                                                                       \
 298         struct gl518_data *data = dev_get_drvdata(dev);                 \
 299         struct i2c_client *client = data->client;                       \
 300         long val;                                                       \
 301         int err = kstrtol(buf, 10, &val);                               \
 302         if (err)                                                        \
 303                 return err;                                             \
 304                                                                         \
 305         mutex_lock(&data->update_lock);                                 \
 306         data->value = type##_TO_REG(val);                               \
 307         gl518_write_value(client, reg, data->value);                    \
 308         mutex_unlock(&data->update_lock);                               \
 309         return count;                                                   \
 310 }
 311
 312 #define set_bits(type, suffix, value, reg, mask, shift)                 \
 313 static ssize_t set_##suffix(struct device *dev,                         \
 314                             struct device_attribute *attr,              \
 315                             const char *buf, size_t count)              \
 316 {                                                                       \
 317         struct gl518_data *data = dev_get_drvdata(dev);                 \
 318         struct i2c_client *client = data->client;                       \
 319         int regvalue;                                                   \
 320         unsigned long val;                                              \
 321         int err = kstrtoul(buf, 10, &val);                              \
 322         if (err)                                                        \
 323                 return err;                                             \
 324                                                                         \
 325         mutex_lock(&data->update_lock);                                 \
 326         regvalue = gl518_read_value(client, reg);                       \
 327         data->value = type##_TO_REG(val);                               \
 328         regvalue = (regvalue & ~mask) | (data->value << shift);         \
 329         gl518_write_value(client, reg, regvalue);                       \
 330         mutex_unlock(&data->update_lock);                               \
 331         return count;                                                   \
 332 }
 333
 334 #define set_low(type, suffix, value, reg)                               \
 335         set_bits(type, suffix, value, reg, 0x00ff, 0)
 336 #define set_high(type, suffix, value, reg)                              \
 337         set_bits(type, suffix, value, reg, 0xff00, 8)
 338
 339 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
 340 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
 341 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
 342 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
 343 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
 344 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
 345 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
 346 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
 347 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
 348 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
 349 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
 350 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
 351 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
 352
 353 static ssize_t fan_min_store(struct device *dev,
 354                              struct device_attribute *attr, const char *buf,
 355                              size_t count)
 356 {
 357         struct gl518_data *data = dev_get_drvdata(dev);
 358         struct i2c_client *client = data->client;
 359         int nr = to_sensor_dev_attr(attr)->index;
 360         int regvalue;
 361         unsigned long val;
 362         int err;
 363
 364         err = kstrtoul(buf, 10, &val);
 365         if (err)
 366                 return err;
 367
 368         mutex_lock(&data->update_lock);
 369         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 370         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 371         regvalue = (regvalue & (0xff << (8 * nr)))
 372                  | (data->fan_min[nr] << (8 * (1 - nr)));
 373         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
 374
 375         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 376         if (data->fan_min[nr] == 0)
 377                 data->alarm_mask &= ~(0x20 << nr);
 378         else
 379                 data->alarm_mask |= (0x20 << nr);
 380         data->beep_mask &= data->alarm_mask;
 381         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 382
 383         mutex_unlock(&data->update_lock);
 384         return count;
 385 }
 386
 387 static ssize_t fan_div_store(struct device *dev,
 388                              struct device_attribute *attr, const char *buf,
 389                              size_t count)
 390 {
 391         struct gl518_data *data = dev_get_drvdata(dev);
 392         struct i2c_client *client = data->client;
 393         int nr = to_sensor_dev_attr(attr)->index;
 394         int regvalue;
 395         unsigned long val;
 396         int err;
 397
 398         err = kstrtoul(buf, 10, &val);
 399         if (err)
 400                 return err;
 401
 402         switch (val) {
 403         case 1:
 404                 val = 0;
 405                 break;
 406         case 2:
 407                 val = 1;
 408                 break;
 409         case 4:
 410                 val = 2;
 411                 break;
 412         case 8:
 413                 val = 3;
 414                 break;
 415         default:
 416                 dev_err(dev,
 417                         "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n",
 418                         val);
 419                 return -EINVAL;
 420         }
 421
 422         mutex_lock(&data->update_lock);
 423         regvalue = gl518_read_value(client, GL518_REG_MISC);
 424         data->fan_div[nr] = val;
 425         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
 426                  | (data->fan_div[nr] << (6 - 2 * nr));
 427         gl518_write_value(client, GL518_REG_MISC, regvalue);
 428         mutex_unlock(&data->update_lock);
 429         return count;
 430 }
 431
 432 static DEVICE_ATTR(temp1_input, 0444, show_temp_input1, NULL);
 433 static DEVICE_ATTR(temp1_max, 0644, show_temp_max1, set_temp_max1);
 434 static DEVICE_ATTR(temp1_max_hyst, 0644,
 435                    show_temp_hyst1, set_temp_hyst1);
 436 static DEVICE_ATTR(fan1_auto, 0644, show_fan_auto1, set_fan_auto1);
 437 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
 438 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
 439 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
 440 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
 441 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
 442 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
 443 static DEVICE_ATTR(in0_input, 0444, show_in_input0, NULL);
 444 static DEVICE_ATTR(in1_input, 0444, show_in_input1, NULL);
 445 static DEVICE_ATTR(in2_input, 0444, show_in_input2, NULL);
 446 static DEVICE_ATTR(in3_input, 0444, show_in_input3, NULL);
 447 static DEVICE_ATTR(in0_min, 0644, show_in_min0, set_in_min0);
 448 static DEVICE_ATTR(in1_min, 0644, show_in_min1, set_in_min1);
 449 static DEVICE_ATTR(in2_min, 0644, show_in_min2, set_in_min2);
 450 static DEVICE_ATTR(in3_min, 0644, show_in_min3, set_in_min3);
 451 static DEVICE_ATTR(in0_max, 0644, show_in_max0, set_in_max0);
 452 static DEVICE_ATTR(in1_max, 0644, show_in_max1, set_in_max1);
 453 static DEVICE_ATTR(in2_max, 0644, show_in_max2, set_in_max2);
 454 static DEVICE_ATTR(in3_max, 0644, show_in_max3, set_in_max3);
 455 static DEVICE_ATTR(alarms, 0444, show_alarms, NULL);
 456 static DEVICE_ATTR(beep_enable, 0644,
 457                    show_beep_enable, set_beep_enable);
 458 static DEVICE_ATTR(beep_mask, 0644,
 459                    show_beep_mask, set_beep_mask);
 460
 461 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
 462                           char *buf)
 463 {
 464         int bitnr = to_sensor_dev_attr(attr)->index;
 465         struct gl518_data *data = gl518_update_device(dev);
 466         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 467 }
 468
 469 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
 470 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
 471 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
 472 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
 473 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
 474 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5);
 475 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6);
 476
 477 static ssize_t beep_show(struct device *dev, struct device_attribute *attr,
 478                          char *buf)
 479 {
 480         int bitnr = to_sensor_dev_attr(attr)->index;
 481         struct gl518_data *data = gl518_update_device(dev);
 482         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 483 }
 484
 485 static ssize_t beep_store(struct device *dev, struct device_attribute *attr,
 486                           const char *buf, size_t count)
 487 {
 488         struct gl518_data *data = dev_get_drvdata(dev);
 489         struct i2c_client *client = data->client;
 490         int bitnr = to_sensor_dev_attr(attr)->index;
 491         unsigned long bit;
 492         int err;
 493
 494         err = kstrtoul(buf, 10, &bit);
 495         if (err)
 496                 return err;
 497
 498         if (bit & ~1)
 499                 return -EINVAL;
 500
 501         mutex_lock(&data->update_lock);
 502         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 503         if (bit)
 504                 data->beep_mask |= (1 << bitnr);
 505         else
 506                 data->beep_mask &= ~(1 << bitnr);
 507         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 508         mutex_unlock(&data->update_lock);
 509         return count;
 510 }
 511
 512 static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0);
 513 static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1);
 514 static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2);
 515 static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3);
 516 static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4);
 517 static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5);
 518 static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6);
 519
 520 static struct attribute *gl518_attributes[] = {
 521         &dev_attr_in3_input.attr,
 522         &dev_attr_in0_min.attr,
 523         &dev_attr_in1_min.attr,
 524         &dev_attr_in2_min.attr,
 525         &dev_attr_in3_min.attr,
 526         &dev_attr_in0_max.attr,
 527         &dev_attr_in1_max.attr,
 528         &dev_attr_in2_max.attr,
 529         &dev_attr_in3_max.attr,
 530         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 531         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 532         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 533         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 534         &sensor_dev_attr_in0_beep.dev_attr.attr,
 535         &sensor_dev_attr_in1_beep.dev_attr.attr,
 536         &sensor_dev_attr_in2_beep.dev_attr.attr,
 537         &sensor_dev_attr_in3_beep.dev_attr.attr,
 538
 539         &dev_attr_fan1_auto.attr,
 540         &sensor_dev_attr_fan1_input.dev_attr.attr,
 541         &sensor_dev_attr_fan2_input.dev_attr.attr,
 542         &sensor_dev_attr_fan1_min.dev_attr.attr,
 543         &sensor_dev_attr_fan2_min.dev_attr.attr,
 544         &sensor_dev_attr_fan1_div.dev_attr.attr,
 545         &sensor_dev_attr_fan2_div.dev_attr.attr,
 546         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 547         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 548         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 549         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 550
 551         &dev_attr_temp1_input.attr,
 552         &dev_attr_temp1_max.attr,
 553         &dev_attr_temp1_max_hyst.attr,
 554         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 555         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 556
 557         &dev_attr_alarms.attr,
 558         &dev_attr_beep_enable.attr,
 559         &dev_attr_beep_mask.attr,
 560         NULL
 561 };
 562
 563 static const struct attribute_group gl518_group = {
 564         .attrs = gl518_attributes,
 565 };
 566
 567 static struct attribute *gl518_attributes_r80[] = {
 568         &dev_attr_in0_input.attr,
 569         &dev_attr_in1_input.attr,
 570         &dev_attr_in2_input.attr,
 571         NULL
 572 };
 573
 574 static const struct attribute_group gl518_group_r80 = {
 575         .attrs = gl518_attributes_r80,
 576 };
 577
 578 /*
 579  * Real code
 580  */
 581
 582 /* Return 0 if detection is successful, -ENODEV otherwise */
 583 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
 584 {
 585         struct i2c_adapter *adapter = client->adapter;
 586         int rev;
 587
 588         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 589                                      I2C_FUNC_SMBUS_WORD_DATA))
 590                 return -ENODEV;
 591
 592         /* Now, we do the remaining detection. */
 593         if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
 594          || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
 595                 return -ENODEV;
 596
 597         /* Determine the chip type. */
 598         rev = gl518_read_value(client, GL518_REG_REVISION);
 599         if (rev != 0x00 && rev != 0x80)
 600                 return -ENODEV;
 601
 602         strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
 603
 604         return 0;
 605 }
 606
 607 /*
 608  * Called when we have found a new GL518SM.
 609  * Note that we preserve D4:NoFan2 and D2:beep_enable.
 610  */
 611 static void gl518_init_client(struct i2c_client *client)
 612 {
 613         /* Make sure we leave D7:Reset untouched */
 614         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
 615
 616         /* Comparator mode (D3=0), standby mode (D6=0) */
 617         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
 618
 619         /* Never interrupts */
 620         gl518_write_value(client, GL518_REG_MASK, 0x00);
 621
 622         /* Clear status register (D5=1), start (D6=1) */
 623         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
 624         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
 625 }
 626
 627 static int gl518_probe(struct i2c_client *client,
 628                        const struct i2c_device_id *id)
 629 {
 630         struct device *dev = &client->dev;
 631         struct device *hwmon_dev;
 632         struct gl518_data *data;
 633         int revision;
 634
 635         data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL);
 636         if (!data)
 637                 return -ENOMEM;
 638
 639         data->client = client;
 640         revision = gl518_read_value(client, GL518_REG_REVISION);
 641         data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
 642         mutex_init(&data->update_lock);
 643
 644         /* Initialize the GL518SM chip */
 645         data->alarm_mask = 0xff;
 646         gl518_init_client(client);
 647
 648         /* sysfs hooks */
 649         data->groups[0] = &gl518_group;
 650         if (data->type == gl518sm_r80)
 651                 data->groups[1] = &gl518_group_r80;
 652
 653         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 654                                                            data, data->groups);
 655         return PTR_ERR_OR_ZERO(hwmon_dev);
 656 }
 657
 658 static const struct i2c_device_id gl518_id[] = {
 659         { "gl518sm", 0 },
 660         { }
 661 };
 662 MODULE_DEVICE_TABLE(i2c, gl518_id);
 663
 664 static struct i2c_driver gl518_driver = {
 665         .class          = I2C_CLASS_HWMON,
 666         .driver = {
 667                 .name   = "gl518sm",
 668         },
 669         .probe          = gl518_probe,
 670         .id_table       = gl518_id,
 671         .detect         = gl518_detect,
 672         .address_list   = normal_i2c,
 673 };
 674
 675 module_i2c_driver(gl518_driver);
 676
 677 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 678         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
 679         "Hong-Gunn Chew <hglinux@gunnet.org>");
 680 MODULE_DESCRIPTION("GL518SM driver");
 681 MODULE_LICENSE("GPL");