drivers/hwmon/gl520sm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
   4  *             monitoring
   5  * Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>,
   6  *                           Kyösti Mälkki <kmalkki@cc.hut.fi>
   7  * Copyright (c) 2005   Maarten Deprez <maartendeprez@users.sourceforge.net>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/jiffies.h>
  14 #include <linux/i2c.h>
  15 #include <linux/hwmon.h>
  16 #include <linux/hwmon-sysfs.h>
  17 #include <linux/hwmon-vid.h>
  18 #include <linux/err.h>
  19 #include <linux/mutex.h>
  20 #include <linux/sysfs.h>
  21
  22 /* Type of the extra sensor */
  23 static unsigned short extra_sensor_type;
  24 module_param(extra_sensor_type, ushort, 0);
  25 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  26
  27 /* Addresses to scan */
  28 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  29
  30 /*
  31  * Many GL520 constants specified below
  32  * One of the inputs can be configured as either temp or voltage.
  33  * That's why _TEMP2 and _IN4 access the same register
  34  */
  35
  36 /* The GL520 registers */
  37 #define GL520_REG_CHIP_ID               0x00
  38 #define GL520_REG_REVISION              0x01
  39 #define GL520_REG_CONF                  0x03
  40 #define GL520_REG_MASK                  0x11
  41
  42 #define GL520_REG_VID_INPUT             0x02
  43
  44 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
  45 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
  46 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
  47 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
  48
  49 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
  50 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
  51 static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
  52
  53 #define GL520_REG_FAN_INPUT             0x07
  54 #define GL520_REG_FAN_MIN               0x08
  55 #define GL520_REG_FAN_DIV               0x0f
  56 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  57
  58 #define GL520_REG_ALARMS                0x12
  59 #define GL520_REG_BEEP_MASK             0x10
  60 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  61
  62 /* Client data */
  63 struct gl520_data {
  64         struct i2c_client *client;
  65         const struct attribute_group *groups[3];
  66         struct mutex update_lock;
  67         char valid;             /* zero until the following fields are valid */
  68         unsigned long last_updated;     /* in jiffies */
  69
  70         u8 vid;
  71         u8 vrm;
  72         u8 in_input[5];         /* [0] = VVD */
  73         u8 in_min[5];           /* [0] = VDD */
  74         u8 in_max[5];           /* [0] = VDD */
  75         u8 fan_input[2];
  76         u8 fan_min[2];
  77         u8 fan_div[2];
  78         u8 fan_off;
  79         u8 temp_input[2];
  80         u8 temp_max[2];
  81         u8 temp_max_hyst[2];
  82         u8 alarms;
  83         u8 beep_enable;
  84         u8 beep_mask;
  85         u8 alarm_mask;
  86         u8 two_temps;
  87 };
  88
  89 /*
  90  * Registers 0x07 to 0x0c are word-sized, others are byte-sized
  91  * GL520 uses a high-byte first convention
  92  */
  93 static int gl520_read_value(struct i2c_client *client, u8 reg)
  94 {
  95         if ((reg >= 0x07) && (reg <= 0x0c))
  96                 return i2c_smbus_read_word_swapped(client, reg);
  97         else
  98                 return i2c_smbus_read_byte_data(client, reg);
  99 }
 100
 101 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 102 {
 103         if ((reg >= 0x07) && (reg <= 0x0c))
 104                 return i2c_smbus_write_word_swapped(client, reg, value);
 105         else
 106                 return i2c_smbus_write_byte_data(client, reg, value);
 107 }
 108
 109 static struct gl520_data *gl520_update_device(struct device *dev)
 110 {
 111         struct gl520_data *data = dev_get_drvdata(dev);
 112         struct i2c_client *client = data->client;
 113         int val, i;
 114
 115         mutex_lock(&data->update_lock);
 116
 117         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 118
 119                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 120
 121                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 122                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 123                 data->vid = gl520_read_value(client,
 124                                              GL520_REG_VID_INPUT) & 0x1f;
 125
 126                 for (i = 0; i < 4; i++) {
 127                         data->in_input[i] = gl520_read_value(client,
 128                                                         GL520_REG_IN_INPUT[i]);
 129                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 130                         data->in_min[i] = val & 0xff;
 131                         data->in_max[i] = (val >> 8) & 0xff;
 132                 }
 133
 134                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 135                 data->fan_input[0] = (val >> 8) & 0xff;
 136                 data->fan_input[1] = val & 0xff;
 137
 138                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 139                 data->fan_min[0] = (val >> 8) & 0xff;
 140                 data->fan_min[1] = val & 0xff;
 141
 142                 data->temp_input[0] = gl520_read_value(client,
 143                                                 GL520_REG_TEMP_INPUT[0]);
 144                 data->temp_max[0] = gl520_read_value(client,
 145                                                 GL520_REG_TEMP_MAX[0]);
 146                 data->temp_max_hyst[0] = gl520_read_value(client,
 147                                                 GL520_REG_TEMP_MAX_HYST[0]);
 148
 149                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 150                 data->fan_div[0] = (val >> 6) & 0x03;
 151                 data->fan_div[1] = (val >> 4) & 0x03;
 152                 data->fan_off = (val >> 2) & 0x01;
 153
 154                 data->alarms &= data->alarm_mask;
 155
 156                 val = gl520_read_value(client, GL520_REG_CONF);
 157                 data->beep_enable = !((val >> 2) & 1);
 158
 159                 /* Temp1 and Vin4 are the same input */
 160                 if (data->two_temps) {
 161                         data->temp_input[1] = gl520_read_value(client,
 162                                                 GL520_REG_TEMP_INPUT[1]);
 163                         data->temp_max[1] = gl520_read_value(client,
 164                                                 GL520_REG_TEMP_MAX[1]);
 165                         data->temp_max_hyst[1] = gl520_read_value(client,
 166                                                 GL520_REG_TEMP_MAX_HYST[1]);
 167                 } else {
 168                         data->in_input[4] = gl520_read_value(client,
 169                                                 GL520_REG_IN_INPUT[4]);
 170                         data->in_min[4] = gl520_read_value(client,
 171                                                 GL520_REG_IN_MIN[4]);
 172                         data->in_max[4] = gl520_read_value(client,
 173                                                 GL520_REG_IN_MAX[4]);
 174                 }
 175
 176                 data->last_updated = jiffies;
 177                 data->valid = 1;
 178         }
 179
 180         mutex_unlock(&data->update_lock);
 181
 182         return data;
 183 }
 184
 185 /*
 186  * Sysfs stuff
 187  */
 188
 189 static ssize_t cpu0_vid_show(struct device *dev,
 190                              struct device_attribute *attr, char *buf)
 191 {
 192         struct gl520_data *data = gl520_update_device(dev);
 193         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 194 }
 195 static DEVICE_ATTR_RO(cpu0_vid);
 196
 197 #define VDD_FROM_REG(val)       DIV_ROUND_CLOSEST((val) * 95, 4)
 198 #define VDD_CLAMP(val)          clamp_val(val, 0, 255 * 95 / 4)
 199 #define VDD_TO_REG(val)         DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
 200
 201 #define IN_FROM_REG(val)        ((val) * 19)
 202 #define IN_CLAMP(val)           clamp_val(val, 0, 255 * 19)
 203 #define IN_TO_REG(val)          DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
 204
 205 static ssize_t in_input_show(struct device *dev,
 206                              struct device_attribute *attr, char *buf)
 207 {
 208         int n = to_sensor_dev_attr(attr)->index;
 209         struct gl520_data *data = gl520_update_device(dev);
 210         u8 r = data->in_input[n];
 211
 212         if (n == 0)
 213                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 214         else
 215                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 216 }
 217
 218 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
 219                            char *buf)
 220 {
 221         int n = to_sensor_dev_attr(attr)->index;
 222         struct gl520_data *data = gl520_update_device(dev);
 223         u8 r = data->in_min[n];
 224
 225         if (n == 0)
 226                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 227         else
 228                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 229 }
 230
 231 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
 232                            char *buf)
 233 {
 234         int n = to_sensor_dev_attr(attr)->index;
 235         struct gl520_data *data = gl520_update_device(dev);
 236         u8 r = data->in_max[n];
 237
 238         if (n == 0)
 239                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 240         else
 241                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 242 }
 243
 244 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
 245                             const char *buf, size_t count)
 246 {
 247         struct gl520_data *data = dev_get_drvdata(dev);
 248         struct i2c_client *client = data->client;
 249         int n = to_sensor_dev_attr(attr)->index;
 250         u8 r;
 251         long v;
 252         int err;
 253
 254         err = kstrtol(buf, 10, &v);
 255         if (err)
 256                 return err;
 257
 258         mutex_lock(&data->update_lock);
 259
 260         if (n == 0)
 261                 r = VDD_TO_REG(v);
 262         else
 263                 r = IN_TO_REG(v);
 264
 265         data->in_min[n] = r;
 266
 267         if (n < 4)
 268                 gl520_write_value(client, GL520_REG_IN_MIN[n],
 269                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
 270                                    & ~0xff) | r);
 271         else
 272                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 273
 274         mutex_unlock(&data->update_lock);
 275         return count;
 276 }
 277
 278 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
 279                             const char *buf, size_t count)
 280 {
 281         struct gl520_data *data = dev_get_drvdata(dev);
 282         struct i2c_client *client = data->client;
 283         int n = to_sensor_dev_attr(attr)->index;
 284         u8 r;
 285         long v;
 286         int err;
 287
 288         err = kstrtol(buf, 10, &v);
 289         if (err)
 290                 return err;
 291
 292         if (n == 0)
 293                 r = VDD_TO_REG(v);
 294         else
 295                 r = IN_TO_REG(v);
 296
 297         mutex_lock(&data->update_lock);
 298
 299         data->in_max[n] = r;
 300
 301         if (n < 4)
 302                 gl520_write_value(client, GL520_REG_IN_MAX[n],
 303                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
 304                                    & ~0xff00) | (r << 8));
 305         else
 306                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 307
 308         mutex_unlock(&data->update_lock);
 309         return count;
 310 }
 311
 312 static SENSOR_DEVICE_ATTR_RO(in0_input, in_input, 0);
 313 static SENSOR_DEVICE_ATTR_RO(in1_input, in_input, 1);
 314 static SENSOR_DEVICE_ATTR_RO(in2_input, in_input, 2);
 315 static SENSOR_DEVICE_ATTR_RO(in3_input, in_input, 3);
 316 static SENSOR_DEVICE_ATTR_RO(in4_input, in_input, 4);
 317 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
 318 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
 319 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
 320 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
 321 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
 322 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
 323 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
 324 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
 325 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
 326 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
 327
 328 #define DIV_FROM_REG(val) (1 << (val))
 329 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
 330
 331 #define FAN_BASE(div)           (480000 >> (div))
 332 #define FAN_CLAMP(val, div)     clamp_val(val, FAN_BASE(div) / 255, \
 333                                           FAN_BASE(div))
 334 #define FAN_TO_REG(val, div)    ((val) == 0 ? 0 : \
 335                                  DIV_ROUND_CLOSEST(480000, \
 336                                                 FAN_CLAMP(val, div) << (div)))
 337
 338 static ssize_t fan_input_show(struct device *dev,
 339                               struct device_attribute *attr, char *buf)
 340 {
 341         int n = to_sensor_dev_attr(attr)->index;
 342         struct gl520_data *data = gl520_update_device(dev);
 343
 344         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 345                                                  data->fan_div[n]));
 346 }
 347
 348 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
 349                             char *buf)
 350 {
 351         int n = to_sensor_dev_attr(attr)->index;
 352         struct gl520_data *data = gl520_update_device(dev);
 353
 354         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 355                                                  data->fan_div[n]));
 356 }
 357
 358 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
 359                             char *buf)
 360 {
 361         int n = to_sensor_dev_attr(attr)->index;
 362         struct gl520_data *data = gl520_update_device(dev);
 363
 364         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 365 }
 366
 367 static ssize_t fan1_off_show(struct device *dev,
 368                              struct device_attribute *attr, char *buf)
 369 {
 370         struct gl520_data *data = gl520_update_device(dev);
 371         return sprintf(buf, "%d\n", data->fan_off);
 372 }
 373
 374 static ssize_t fan_min_store(struct device *dev,
 375                              struct device_attribute *attr, const char *buf,
 376                              size_t count)
 377 {
 378         struct gl520_data *data = dev_get_drvdata(dev);
 379         struct i2c_client *client = data->client;
 380         int n = to_sensor_dev_attr(attr)->index;
 381         u8 r;
 382         unsigned long v;
 383         int err;
 384
 385         err = kstrtoul(buf, 10, &v);
 386         if (err)
 387                 return err;
 388
 389         mutex_lock(&data->update_lock);
 390         r = FAN_TO_REG(v, data->fan_div[n]);
 391         data->fan_min[n] = r;
 392
 393         if (n == 0)
 394                 gl520_write_value(client, GL520_REG_FAN_MIN,
 395                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 396                                    & ~0xff00) | (r << 8));
 397         else
 398                 gl520_write_value(client, GL520_REG_FAN_MIN,
 399                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 400                                    & ~0xff) | r);
 401
 402         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 403         if (data->fan_min[n] == 0)
 404                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 405         else
 406                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 407         data->beep_mask &= data->alarm_mask;
 408         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 409
 410         mutex_unlock(&data->update_lock);
 411         return count;
 412 }
 413
 414 static ssize_t fan_div_store(struct device *dev,
 415                              struct device_attribute *attr, const char *buf,
 416                              size_t count)
 417 {
 418         struct gl520_data *data = dev_get_drvdata(dev);
 419         struct i2c_client *client = data->client;
 420         int n = to_sensor_dev_attr(attr)->index;
 421         u8 r;
 422         unsigned long v;
 423         int err;
 424
 425         err = kstrtoul(buf, 10, &v);
 426         if (err)
 427                 return err;
 428
 429         switch (v) {
 430         case 1:
 431                 r = 0;
 432                 break;
 433         case 2:
 434                 r = 1;
 435                 break;
 436         case 4:
 437                 r = 2;
 438                 break;
 439         case 8:
 440                 r = 3;
 441                 break;
 442         default:
 443                 dev_err(&client->dev,
 444         "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 445                 return -EINVAL;
 446         }
 447
 448         mutex_lock(&data->update_lock);
 449         data->fan_div[n] = r;
 450
 451         if (n == 0)
 452                 gl520_write_value(client, GL520_REG_FAN_DIV,
 453                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 454                                    & ~0xc0) | (r << 6));
 455         else
 456                 gl520_write_value(client, GL520_REG_FAN_DIV,
 457                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 458                                    & ~0x30) | (r << 4));
 459
 460         mutex_unlock(&data->update_lock);
 461         return count;
 462 }
 463
 464 static ssize_t fan1_off_store(struct device *dev,
 465                               struct device_attribute *attr, const char *buf,
 466                               size_t count)
 467 {
 468         struct gl520_data *data = dev_get_drvdata(dev);
 469         struct i2c_client *client = data->client;
 470         u8 r;
 471         unsigned long v;
 472         int err;
 473
 474         err = kstrtoul(buf, 10, &v);
 475         if (err)
 476                 return err;
 477
 478         r = (v ? 1 : 0);
 479
 480         mutex_lock(&data->update_lock);
 481         data->fan_off = r;
 482         gl520_write_value(client, GL520_REG_FAN_OFF,
 483                           (gl520_read_value(client, GL520_REG_FAN_OFF)
 484                            & ~0x0c) | (r << 2));
 485         mutex_unlock(&data->update_lock);
 486         return count;
 487 }
 488
 489 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
 490 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
 491 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
 492 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
 493 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
 494 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
 495 static DEVICE_ATTR_RW(fan1_off);
 496
 497 #define TEMP_FROM_REG(val)      (((val) - 130) * 1000)
 498 #define TEMP_CLAMP(val)         clamp_val(val, -130000, 125000)
 499 #define TEMP_TO_REG(val)        (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130)
 500
 501 static ssize_t temp_input_show(struct device *dev,
 502                                struct device_attribute *attr, char *buf)
 503 {
 504         int n = to_sensor_dev_attr(attr)->index;
 505         struct gl520_data *data = gl520_update_device(dev);
 506
 507         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 508 }
 509
 510 static ssize_t temp_max_show(struct device *dev,
 511                              struct device_attribute *attr, char *buf)
 512 {
 513         int n = to_sensor_dev_attr(attr)->index;
 514         struct gl520_data *data = gl520_update_device(dev);
 515
 516         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 517 }
 518
 519 static ssize_t temp_max_hyst_show(struct device *dev,
 520                                   struct device_attribute *attr, char *buf)
 521 {
 522         int n = to_sensor_dev_attr(attr)->index;
 523         struct gl520_data *data = gl520_update_device(dev);
 524
 525         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 526 }
 527
 528 static ssize_t temp_max_store(struct device *dev,
 529                               struct device_attribute *attr, const char *buf,
 530                               size_t count)
 531 {
 532         struct gl520_data *data = dev_get_drvdata(dev);
 533         struct i2c_client *client = data->client;
 534         int n = to_sensor_dev_attr(attr)->index;
 535         long v;
 536         int err;
 537
 538         err = kstrtol(buf, 10, &v);
 539         if (err)
 540                 return err;
 541
 542         mutex_lock(&data->update_lock);
 543         data->temp_max[n] = TEMP_TO_REG(v);
 544         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 545         mutex_unlock(&data->update_lock);
 546         return count;
 547 }
 548
 549 static ssize_t temp_max_hyst_store(struct device *dev,
 550                                    struct device_attribute *attr,
 551                                    const char *buf, size_t count)
 552 {
 553         struct gl520_data *data = dev_get_drvdata(dev);
 554         struct i2c_client *client = data->client;
 555         int n = to_sensor_dev_attr(attr)->index;
 556         long v;
 557         int err;
 558
 559         err = kstrtol(buf, 10, &v);
 560         if (err)
 561                 return err;
 562
 563         mutex_lock(&data->update_lock);
 564         data->temp_max_hyst[n] = TEMP_TO_REG(v);
 565         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 566                           data->temp_max_hyst[n]);
 567         mutex_unlock(&data->update_lock);
 568         return count;
 569 }
 570
 571 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
 572 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
 573 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
 574 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
 575 static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp_max_hyst, 0);
 576 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_max_hyst, 1);
 577
 578 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
 579                            char *buf)
 580 {
 581         struct gl520_data *data = gl520_update_device(dev);
 582         return sprintf(buf, "%d\n", data->alarms);
 583 }
 584
 585 static ssize_t beep_enable_show(struct device *dev,
 586                                 struct device_attribute *attr, char *buf)
 587 {
 588         struct gl520_data *data = gl520_update_device(dev);
 589         return sprintf(buf, "%d\n", data->beep_enable);
 590 }
 591
 592 static ssize_t beep_mask_show(struct device *dev,
 593                               struct device_attribute *attr, char *buf)
 594 {
 595         struct gl520_data *data = gl520_update_device(dev);
 596         return sprintf(buf, "%d\n", data->beep_mask);
 597 }
 598
 599 static ssize_t beep_enable_store(struct device *dev,
 600                                  struct device_attribute *attr,
 601                                  const char *buf, size_t count)
 602 {
 603         struct gl520_data *data = dev_get_drvdata(dev);
 604         struct i2c_client *client = data->client;
 605         u8 r;
 606         unsigned long v;
 607         int err;
 608
 609         err = kstrtoul(buf, 10, &v);
 610         if (err)
 611                 return err;
 612
 613         r = (v ? 0 : 1);
 614
 615         mutex_lock(&data->update_lock);
 616         data->beep_enable = !r;
 617         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 618                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 619                            & ~0x04) | (r << 2));
 620         mutex_unlock(&data->update_lock);
 621         return count;
 622 }
 623
 624 static ssize_t beep_mask_store(struct device *dev,
 625                                struct device_attribute *attr, const char *buf,
 626                                size_t count)
 627 {
 628         struct gl520_data *data = dev_get_drvdata(dev);
 629         struct i2c_client *client = data->client;
 630         unsigned long r;
 631         int err;
 632
 633         err = kstrtoul(buf, 10, &r);
 634         if (err)
 635                 return err;
 636
 637         mutex_lock(&data->update_lock);
 638         r &= data->alarm_mask;
 639         data->beep_mask = r;
 640         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 641         mutex_unlock(&data->update_lock);
 642         return count;
 643 }
 644
 645 static DEVICE_ATTR_RO(alarms);
 646 static DEVICE_ATTR_RW(beep_enable);
 647 static DEVICE_ATTR_RW(beep_mask);
 648
 649 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
 650                           char *buf)
 651 {
 652         int bit_nr = to_sensor_dev_attr(attr)->index;
 653         struct gl520_data *data = gl520_update_device(dev);
 654
 655         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 656 }
 657
 658 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
 659 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
 660 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
 661 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
 662 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
 663 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5);
 664 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6);
 665 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 7);
 666 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 7);
 667
 668 static ssize_t beep_show(struct device *dev, struct device_attribute *attr,
 669                          char *buf)
 670 {
 671         int bitnr = to_sensor_dev_attr(attr)->index;
 672         struct gl520_data *data = gl520_update_device(dev);
 673
 674         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 675 }
 676
 677 static ssize_t beep_store(struct device *dev, struct device_attribute *attr,
 678                           const char *buf, size_t count)
 679 {
 680         struct gl520_data *data = dev_get_drvdata(dev);
 681         struct i2c_client *client = data->client;
 682         int bitnr = to_sensor_dev_attr(attr)->index;
 683         unsigned long bit;
 684
 685         int err;
 686
 687         err = kstrtoul(buf, 10, &bit);
 688         if (err)
 689                 return err;
 690         if (bit & ~1)
 691                 return -EINVAL;
 692
 693         mutex_lock(&data->update_lock);
 694         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 695         if (bit)
 696                 data->beep_mask |= (1 << bitnr);
 697         else
 698                 data->beep_mask &= ~(1 << bitnr);
 699         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 700         mutex_unlock(&data->update_lock);
 701         return count;
 702 }
 703
 704 static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0);
 705 static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1);
 706 static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2);
 707 static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3);
 708 static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4);
 709 static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5);
 710 static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6);
 711 static SENSOR_DEVICE_ATTR_RW(temp2_beep, beep, 7);
 712 static SENSOR_DEVICE_ATTR_RW(in4_beep, beep, 7);
 713
 714 static struct attribute *gl520_attributes[] = {
 715         &dev_attr_cpu0_vid.attr,
 716
 717         &sensor_dev_attr_in0_input.dev_attr.attr,
 718         &sensor_dev_attr_in0_min.dev_attr.attr,
 719         &sensor_dev_attr_in0_max.dev_attr.attr,
 720         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 721         &sensor_dev_attr_in0_beep.dev_attr.attr,
 722         &sensor_dev_attr_in1_input.dev_attr.attr,
 723         &sensor_dev_attr_in1_min.dev_attr.attr,
 724         &sensor_dev_attr_in1_max.dev_attr.attr,
 725         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 726         &sensor_dev_attr_in1_beep.dev_attr.attr,
 727         &sensor_dev_attr_in2_input.dev_attr.attr,
 728         &sensor_dev_attr_in2_min.dev_attr.attr,
 729         &sensor_dev_attr_in2_max.dev_attr.attr,
 730         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 731         &sensor_dev_attr_in2_beep.dev_attr.attr,
 732         &sensor_dev_attr_in3_input.dev_attr.attr,
 733         &sensor_dev_attr_in3_min.dev_attr.attr,
 734         &sensor_dev_attr_in3_max.dev_attr.attr,
 735         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 736         &sensor_dev_attr_in3_beep.dev_attr.attr,
 737
 738         &sensor_dev_attr_fan1_input.dev_attr.attr,
 739         &sensor_dev_attr_fan1_min.dev_attr.attr,
 740         &sensor_dev_attr_fan1_div.dev_attr.attr,
 741         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 742         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 743         &dev_attr_fan1_off.attr,
 744         &sensor_dev_attr_fan2_input.dev_attr.attr,
 745         &sensor_dev_attr_fan2_min.dev_attr.attr,
 746         &sensor_dev_attr_fan2_div.dev_attr.attr,
 747         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 748         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 749
 750         &sensor_dev_attr_temp1_input.dev_attr.attr,
 751         &sensor_dev_attr_temp1_max.dev_attr.attr,
 752         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 753         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 754         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 755
 756         &dev_attr_alarms.attr,
 757         &dev_attr_beep_enable.attr,
 758         &dev_attr_beep_mask.attr,
 759         NULL
 760 };
 761
 762 static const struct attribute_group gl520_group = {
 763         .attrs = gl520_attributes,
 764 };
 765
 766 static struct attribute *gl520_attributes_in4[] = {
 767         &sensor_dev_attr_in4_input.dev_attr.attr,
 768         &sensor_dev_attr_in4_min.dev_attr.attr,
 769         &sensor_dev_attr_in4_max.dev_attr.attr,
 770         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 771         &sensor_dev_attr_in4_beep.dev_attr.attr,
 772         NULL
 773 };
 774
 775 static struct attribute *gl520_attributes_temp2[] = {
 776         &sensor_dev_attr_temp2_input.dev_attr.attr,
 777         &sensor_dev_attr_temp2_max.dev_attr.attr,
 778         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 779         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 780         &sensor_dev_attr_temp2_beep.dev_attr.attr,
 781         NULL
 782 };
 783
 784 static const struct attribute_group gl520_group_in4 = {
 785         .attrs = gl520_attributes_in4,
 786 };
 787
 788 static const struct attribute_group gl520_group_temp2 = {
 789         .attrs = gl520_attributes_temp2,
 790 };
 791
 792
 793 /*
 794  * Real code
 795  */
 796
 797 /* Return 0 if detection is successful, -ENODEV otherwise */
 798 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
 799 {
 800         struct i2c_adapter *adapter = client->adapter;
 801
 802         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 803                                      I2C_FUNC_SMBUS_WORD_DATA))
 804                 return -ENODEV;
 805
 806         /* Determine the chip type. */
 807         if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 808             ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 809             ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 810                 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 811                 return -ENODEV;
 812         }
 813
 814         strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
 815
 816         return 0;
 817 }
 818
 819 /* Called when we have found a new GL520SM. */
 820 static void gl520_init_client(struct i2c_client *client)
 821 {
 822         struct gl520_data *data = i2c_get_clientdata(client);
 823         u8 oldconf, conf;
 824
 825         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 826
 827         data->alarm_mask = 0xff;
 828         data->vrm = vid_which_vrm();
 829
 830         if (extra_sensor_type == 1)
 831                 conf &= ~0x10;
 832         else if (extra_sensor_type == 2)
 833                 conf |= 0x10;
 834         data->two_temps = !(conf & 0x10);
 835
 836         /* If IRQ# is disabled, we can safely force comparator mode */
 837         if (!(conf & 0x20))
 838                 conf &= 0xf7;
 839
 840         /* Enable monitoring if needed */
 841         conf |= 0x40;
 842
 843         if (conf != oldconf)
 844                 gl520_write_value(client, GL520_REG_CONF, conf);
 845
 846         gl520_update_device(&(client->dev));
 847
 848         if (data->fan_min[0] == 0)
 849                 data->alarm_mask &= ~0x20;
 850         if (data->fan_min[1] == 0)
 851                 data->alarm_mask &= ~0x40;
 852
 853         data->beep_mask &= data->alarm_mask;
 854         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 855 }
 856
 857 static int gl520_probe(struct i2c_client *client,
 858                        const struct i2c_device_id *id)
 859 {
 860         struct device *dev = &client->dev;
 861         struct device *hwmon_dev;
 862         struct gl520_data *data;
 863
 864         data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
 865         if (!data)
 866                 return -ENOMEM;
 867
 868         i2c_set_clientdata(client, data);
 869         mutex_init(&data->update_lock);
 870         data->client = client;
 871
 872         /* Initialize the GL520SM chip */
 873         gl520_init_client(client);
 874
 875         /* sysfs hooks */
 876         data->groups[0] = &gl520_group;
 877
 878         if (data->two_temps)
 879                 data->groups[1] = &gl520_group_temp2;
 880         else
 881                 data->groups[1] = &gl520_group_in4;
 882
 883         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 884                                                            data, data->groups);
 885         return PTR_ERR_OR_ZERO(hwmon_dev);
 886 }
 887
 888 static const struct i2c_device_id gl520_id[] = {
 889         { "gl520sm", 0 },
 890         { }
 891 };
 892 MODULE_DEVICE_TABLE(i2c, gl520_id);
 893
 894 static struct i2c_driver gl520_driver = {
 895         .class          = I2C_CLASS_HWMON,
 896         .driver = {
 897                 .name   = "gl520sm",
 898         },
 899         .probe          = gl520_probe,
 900         .id_table       = gl520_id,
 901         .detect         = gl520_detect,
 902         .address_list   = normal_i2c,
 903 };
 904
 905 module_i2c_driver(gl520_driver);
 906
 907 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 908         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 909         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 910 MODULE_DESCRIPTION("GL520SM driver");
 911 MODULE_LICENSE("GPL");