drivers/hwmon/gl520sm.c

   1 /*
   2     gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
   3                 monitoring
   4     Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>,
   5                               Kyösti Mälkki <kmalkki@cc.hut.fi>
   6     Copyright (c) 2005        Maarten Deprez <maartendeprez@users.sourceforge.net>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/i2c.h>
  29 #include <linux/hwmon.h>
  30 #include <linux/hwmon-sysfs.h>
  31 #include <linux/hwmon-vid.h>
  32 #include <linux/err.h>
  33 #include <linux/mutex.h>
  34 #include <linux/sysfs.h>
  35
  36 /* Type of the extra sensor */
  37 static unsigned short extra_sensor_type;
  38 module_param(extra_sensor_type, ushort, 0);
  39 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  40
  41 /* Addresses to scan */
  42 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  43
  44 /* Many GL520 constants specified below
  45 One of the inputs can be configured as either temp or voltage.
  46 That's why _TEMP2 and _IN4 access the same register
  47 */
  48
  49 /* The GL520 registers */
  50 #define GL520_REG_CHIP_ID               0x00
  51 #define GL520_REG_REVISION              0x01
  52 #define GL520_REG_CONF                  0x03
  53 #define GL520_REG_MASK                  0x11
  54
  55 #define GL520_REG_VID_INPUT             0x02
  56
  57 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
  58 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
  59 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
  60 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
  61
  62 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
  63 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
  64 static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
  65
  66 #define GL520_REG_FAN_INPUT             0x07
  67 #define GL520_REG_FAN_MIN               0x08
  68 #define GL520_REG_FAN_DIV               0x0f
  69 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  70
  71 #define GL520_REG_ALARMS                0x12
  72 #define GL520_REG_BEEP_MASK             0x10
  73 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  74
  75 /*
  76  * Function declarations
  77  */
  78
  79 static int gl520_probe(struct i2c_client *client,
  80                        const struct i2c_device_id *id);
  81 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
  82 static void gl520_init_client(struct i2c_client *client);
  83 static int gl520_remove(struct i2c_client *client);
  84 static int gl520_read_value(struct i2c_client *client, u8 reg);
  85 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
  86 static struct gl520_data *gl520_update_device(struct device *dev);
  87
  88 /* Driver data */
  89 static const struct i2c_device_id gl520_id[] = {
  90         { "gl520sm", 0 },
  91         { }
  92 };
  93 MODULE_DEVICE_TABLE(i2c, gl520_id);
  94
  95 static struct i2c_driver gl520_driver = {
  96         .class          = I2C_CLASS_HWMON,
  97         .driver = {
  98                 .name   = "gl520sm",
  99         },
 100         .probe          = gl520_probe,
 101         .remove         = gl520_remove,
 102         .id_table       = gl520_id,
 103         .detect         = gl520_detect,
 104         .address_list   = normal_i2c,
 105 };
 106
 107 /* Client data */
 108 struct gl520_data {
 109         struct device *hwmon_dev;
 110         struct mutex update_lock;
 111         char valid;             /* zero until the following fields are valid */
 112         unsigned long last_updated;     /* in jiffies */
 113
 114         u8 vid;
 115         u8 vrm;
 116         u8 in_input[5];         /* [0] = VVD */
 117         u8 in_min[5];           /* [0] = VDD */
 118         u8 in_max[5];           /* [0] = VDD */
 119         u8 fan_input[2];
 120         u8 fan_min[2];
 121         u8 fan_div[2];
 122         u8 fan_off;
 123         u8 temp_input[2];
 124         u8 temp_max[2];
 125         u8 temp_max_hyst[2];
 126         u8 alarms;
 127         u8 beep_enable;
 128         u8 beep_mask;
 129         u8 alarm_mask;
 130         u8 two_temps;
 131 };
 132
 133 /*
 134  * Sysfs stuff
 135  */
 136
 137 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
 138                            char *buf)
 139 {
 140         struct gl520_data *data = gl520_update_device(dev);
 141         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 142 }
 143 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
 144
 145 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 146 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 147
 148 #define IN_FROM_REG(val) ((val)*19)
 149 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 150
 151 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
 152                             char *buf)
 153 {
 154         int n = to_sensor_dev_attr(attr)->index;
 155         struct gl520_data *data = gl520_update_device(dev);
 156         u8 r = data->in_input[n];
 157
 158         if (n == 0)
 159                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 160         else
 161                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 162 }
 163
 164 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
 165                           char *buf)
 166 {
 167         int n = to_sensor_dev_attr(attr)->index;
 168         struct gl520_data *data = gl520_update_device(dev);
 169         u8 r = data->in_min[n];
 170
 171         if (n == 0)
 172                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 173         else
 174                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 175 }
 176
 177 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
 178                           char *buf)
 179 {
 180         int n = to_sensor_dev_attr(attr)->index;
 181         struct gl520_data *data = gl520_update_device(dev);
 182         u8 r = data->in_max[n];
 183
 184         if (n == 0)
 185                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 186         else
 187                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 188 }
 189
 190 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 191                           const char *buf, size_t count)
 192 {
 193         struct i2c_client *client = to_i2c_client(dev);
 194         struct gl520_data *data = i2c_get_clientdata(client);
 195         int n = to_sensor_dev_attr(attr)->index;
 196         long v = simple_strtol(buf, NULL, 10);
 197         u8 r;
 198
 199         mutex_lock(&data->update_lock);
 200
 201         if (n == 0)
 202                 r = VDD_TO_REG(v);
 203         else
 204                 r = IN_TO_REG(v);
 205
 206         data->in_min[n] = r;
 207
 208         if (n < 4)
 209                 gl520_write_value(client, GL520_REG_IN_MIN[n],
 210                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
 211                                    & ~0xff) | r);
 212         else
 213                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 214
 215         mutex_unlock(&data->update_lock);
 216         return count;
 217 }
 218
 219 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 220                           const char *buf, size_t count)
 221 {
 222         struct i2c_client *client = to_i2c_client(dev);
 223         struct gl520_data *data = i2c_get_clientdata(client);
 224         int n = to_sensor_dev_attr(attr)->index;
 225         long v = simple_strtol(buf, NULL, 10);
 226         u8 r;
 227
 228         if (n == 0)
 229                 r = VDD_TO_REG(v);
 230         else
 231                 r = IN_TO_REG(v);
 232
 233         mutex_lock(&data->update_lock);
 234
 235         data->in_max[n] = r;
 236
 237         if (n < 4)
 238                 gl520_write_value(client, GL520_REG_IN_MAX[n],
 239                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
 240                                    & ~0xff00) | (r << 8));
 241         else
 242                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 243
 244         mutex_unlock(&data->update_lock);
 245         return count;
 246 }
 247
 248 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
 249 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
 250 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
 251 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
 252 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
 253 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
 254                 get_in_min, set_in_min, 0);
 255 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
 256                 get_in_min, set_in_min, 1);
 257 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
 258                 get_in_min, set_in_min, 2);
 259 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
 260                 get_in_min, set_in_min, 3);
 261 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
 262                 get_in_min, set_in_min, 4);
 263 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
 264                 get_in_max, set_in_max, 0);
 265 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
 266                 get_in_max, set_in_max, 1);
 267 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
 268                 get_in_max, set_in_max, 2);
 269 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
 270                 get_in_max, set_in_max, 3);
 271 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
 272                 get_in_max, set_in_max, 4);
 273
 274 #define DIV_FROM_REG(val) (1 << (val))
 275 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 276 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
 277
 278 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
 279                              char *buf)
 280 {
 281         int n = to_sensor_dev_attr(attr)->index;
 282         struct gl520_data *data = gl520_update_device(dev);
 283
 284         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 285                                                  data->fan_div[n]));
 286 }
 287
 288 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
 289                            char *buf)
 290 {
 291         int n = to_sensor_dev_attr(attr)->index;
 292         struct gl520_data *data = gl520_update_device(dev);
 293
 294         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 295                                                  data->fan_div[n]));
 296 }
 297
 298 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
 299                            char *buf)
 300 {
 301         int n = to_sensor_dev_attr(attr)->index;
 302         struct gl520_data *data = gl520_update_device(dev);
 303
 304         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 305 }
 306
 307 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
 308                            char *buf)
 309 {
 310         struct gl520_data *data = gl520_update_device(dev);
 311         return sprintf(buf, "%d\n", data->fan_off);
 312 }
 313
 314 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 315                            const char *buf, size_t count)
 316 {
 317         struct i2c_client *client = to_i2c_client(dev);
 318         struct gl520_data *data = i2c_get_clientdata(client);
 319         int n = to_sensor_dev_attr(attr)->index;
 320         unsigned long v = simple_strtoul(buf, NULL, 10);
 321         u8 r;
 322
 323         mutex_lock(&data->update_lock);
 324         r = FAN_TO_REG(v, data->fan_div[n]);
 325         data->fan_min[n] = r;
 326
 327         if (n == 0)
 328                 gl520_write_value(client, GL520_REG_FAN_MIN,
 329                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 330                                    & ~0xff00) | (r << 8));
 331         else
 332                 gl520_write_value(client, GL520_REG_FAN_MIN,
 333                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 334                                    & ~0xff) | r);
 335
 336         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 337         if (data->fan_min[n] == 0)
 338                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 339         else
 340                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 341         data->beep_mask &= data->alarm_mask;
 342         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 343
 344         mutex_unlock(&data->update_lock);
 345         return count;
 346 }
 347
 348 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 349                            const char *buf, size_t count)
 350 {
 351         struct i2c_client *client = to_i2c_client(dev);
 352         struct gl520_data *data = i2c_get_clientdata(client);
 353         int n = to_sensor_dev_attr(attr)->index;
 354         unsigned long v = simple_strtoul(buf, NULL, 10);
 355         u8 r;
 356
 357         switch (v) {
 358         case 1: r = 0; break;
 359         case 2: r = 1; break;
 360         case 4: r = 2; break;
 361         case 8: r = 3; break;
 362         default:
 363                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 364                 return -EINVAL;
 365         }
 366
 367         mutex_lock(&data->update_lock);
 368         data->fan_div[n] = r;
 369
 370         if (n == 0)
 371                 gl520_write_value(client, GL520_REG_FAN_DIV,
 372                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 373                                    & ~0xc0) | (r << 6));
 374         else
 375                 gl520_write_value(client, GL520_REG_FAN_DIV,
 376                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 377                                    & ~0x30) | (r << 4));
 378
 379         mutex_unlock(&data->update_lock);
 380         return count;
 381 }
 382
 383 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
 384                            const char *buf, size_t count)
 385 {
 386         struct i2c_client *client = to_i2c_client(dev);
 387         struct gl520_data *data = i2c_get_clientdata(client);
 388         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 389
 390         mutex_lock(&data->update_lock);
 391         data->fan_off = r;
 392         gl520_write_value(client, GL520_REG_FAN_OFF,
 393                           (gl520_read_value(client, GL520_REG_FAN_OFF)
 394                            & ~0x0c) | (r << 2));
 395         mutex_unlock(&data->update_lock);
 396         return count;
 397 }
 398
 399 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
 400 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
 401 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 402                 get_fan_min, set_fan_min, 0);
 403 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 404                 get_fan_min, set_fan_min, 1);
 405 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 406                 get_fan_div, set_fan_div, 0);
 407 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 408                 get_fan_div, set_fan_div, 1);
 409 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
 410                 get_fan_off, set_fan_off);
 411
 412 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 413 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 414
 415 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
 416                               char *buf)
 417 {
 418         int n = to_sensor_dev_attr(attr)->index;
 419         struct gl520_data *data = gl520_update_device(dev);
 420
 421         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 422 }
 423
 424 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
 425                             char *buf)
 426 {
 427         int n = to_sensor_dev_attr(attr)->index;
 428         struct gl520_data *data = gl520_update_device(dev);
 429
 430         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 431 }
 432
 433 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
 434                                  *attr, char *buf)
 435 {
 436         int n = to_sensor_dev_attr(attr)->index;
 437         struct gl520_data *data = gl520_update_device(dev);
 438
 439         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 440 }
 441
 442 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 443                             const char *buf, size_t count)
 444 {
 445         struct i2c_client *client = to_i2c_client(dev);
 446         struct gl520_data *data = i2c_get_clientdata(client);
 447         int n = to_sensor_dev_attr(attr)->index;
 448         long v = simple_strtol(buf, NULL, 10);
 449
 450         mutex_lock(&data->update_lock);
 451         data->temp_max[n] = TEMP_TO_REG(v);
 452         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 453         mutex_unlock(&data->update_lock);
 454         return count;
 455 }
 456
 457 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
 458                                  *attr, const char *buf, size_t count)
 459 {
 460         struct i2c_client *client = to_i2c_client(dev);
 461         struct gl520_data *data = i2c_get_clientdata(client);
 462         int n = to_sensor_dev_attr(attr)->index;
 463         long v = simple_strtol(buf, NULL, 10);
 464
 465         mutex_lock(&data->update_lock);
 466         data->temp_max_hyst[n] = TEMP_TO_REG(v);
 467         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 468                           data->temp_max_hyst[n]);
 469         mutex_unlock(&data->update_lock);
 470         return count;
 471 }
 472
 473 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
 474 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
 475 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 476                 get_temp_max, set_temp_max, 0);
 477 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
 478                 get_temp_max, set_temp_max, 1);
 479 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 480                 get_temp_max_hyst, set_temp_max_hyst, 0);
 481 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
 482                 get_temp_max_hyst, set_temp_max_hyst, 1);
 483
 484 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
 485                           char *buf)
 486 {
 487         struct gl520_data *data = gl520_update_device(dev);
 488         return sprintf(buf, "%d\n", data->alarms);
 489 }
 490
 491 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
 492                                *attr, char *buf)
 493 {
 494         struct gl520_data *data = gl520_update_device(dev);
 495         return sprintf(buf, "%d\n", data->beep_enable);
 496 }
 497
 498 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
 499                              char *buf)
 500 {
 501         struct gl520_data *data = gl520_update_device(dev);
 502         return sprintf(buf, "%d\n", data->beep_mask);
 503 }
 504
 505 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
 506                                *attr, const char *buf, size_t count)
 507 {
 508         struct i2c_client *client = to_i2c_client(dev);
 509         struct gl520_data *data = i2c_get_clientdata(client);
 510         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 511
 512         mutex_lock(&data->update_lock);
 513         data->beep_enable = !r;
 514         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 515                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 516                            & ~0x04) | (r << 2));
 517         mutex_unlock(&data->update_lock);
 518         return count;
 519 }
 520
 521 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
 522                              const char *buf, size_t count)
 523 {
 524         struct i2c_client *client = to_i2c_client(dev);
 525         struct gl520_data *data = i2c_get_clientdata(client);
 526         u8 r = simple_strtoul(buf, NULL, 10);
 527
 528         mutex_lock(&data->update_lock);
 529         r &= data->alarm_mask;
 530         data->beep_mask = r;
 531         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 532         mutex_unlock(&data->update_lock);
 533         return count;
 534 }
 535
 536 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 537 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 538                 get_beep_enable, set_beep_enable);
 539 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 540                 get_beep_mask, set_beep_mask);
 541
 542 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
 543                          char *buf)
 544 {
 545         int bit_nr = to_sensor_dev_attr(attr)->index;
 546         struct gl520_data *data = gl520_update_device(dev);
 547
 548         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 549 }
 550
 551 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
 552 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
 553 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
 554 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
 555 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
 556 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
 557 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
 558 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
 559 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
 560
 561 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
 562                         char *buf)
 563 {
 564         int bitnr = to_sensor_dev_attr(attr)->index;
 565         struct gl520_data *data = gl520_update_device(dev);
 566
 567         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 568 }
 569
 570 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 571                         const char *buf, size_t count)
 572 {
 573         struct i2c_client *client = to_i2c_client(dev);
 574         struct gl520_data *data = i2c_get_clientdata(client);
 575         int bitnr = to_sensor_dev_attr(attr)->index;
 576         unsigned long bit;
 577
 578         bit = simple_strtoul(buf, NULL, 10);
 579         if (bit & ~1)
 580                 return -EINVAL;
 581
 582         mutex_lock(&data->update_lock);
 583         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 584         if (bit)
 585                 data->beep_mask |= (1 << bitnr);
 586         else
 587                 data->beep_mask &= ~(1 << bitnr);
 588         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 589         mutex_unlock(&data->update_lock);
 590         return count;
 591 }
 592
 593 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
 594 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
 595 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
 596 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
 597 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
 598 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
 599 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
 600 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 601 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 602
 603 static struct attribute *gl520_attributes[] = {
 604         &dev_attr_cpu0_vid.attr,
 605
 606         &sensor_dev_attr_in0_input.dev_attr.attr,
 607         &sensor_dev_attr_in0_min.dev_attr.attr,
 608         &sensor_dev_attr_in0_max.dev_attr.attr,
 609         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 610         &sensor_dev_attr_in0_beep.dev_attr.attr,
 611         &sensor_dev_attr_in1_input.dev_attr.attr,
 612         &sensor_dev_attr_in1_min.dev_attr.attr,
 613         &sensor_dev_attr_in1_max.dev_attr.attr,
 614         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 615         &sensor_dev_attr_in1_beep.dev_attr.attr,
 616         &sensor_dev_attr_in2_input.dev_attr.attr,
 617         &sensor_dev_attr_in2_min.dev_attr.attr,
 618         &sensor_dev_attr_in2_max.dev_attr.attr,
 619         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 620         &sensor_dev_attr_in2_beep.dev_attr.attr,
 621         &sensor_dev_attr_in3_input.dev_attr.attr,
 622         &sensor_dev_attr_in3_min.dev_attr.attr,
 623         &sensor_dev_attr_in3_max.dev_attr.attr,
 624         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 625         &sensor_dev_attr_in3_beep.dev_attr.attr,
 626
 627         &sensor_dev_attr_fan1_input.dev_attr.attr,
 628         &sensor_dev_attr_fan1_min.dev_attr.attr,
 629         &sensor_dev_attr_fan1_div.dev_attr.attr,
 630         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 631         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 632         &dev_attr_fan1_off.attr,
 633         &sensor_dev_attr_fan2_input.dev_attr.attr,
 634         &sensor_dev_attr_fan2_min.dev_attr.attr,
 635         &sensor_dev_attr_fan2_div.dev_attr.attr,
 636         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 637         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 638
 639         &sensor_dev_attr_temp1_input.dev_attr.attr,
 640         &sensor_dev_attr_temp1_max.dev_attr.attr,
 641         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 642         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 643         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 644
 645         &dev_attr_alarms.attr,
 646         &dev_attr_beep_enable.attr,
 647         &dev_attr_beep_mask.attr,
 648         NULL
 649 };
 650
 651 static const struct attribute_group gl520_group = {
 652         .attrs = gl520_attributes,
 653 };
 654
 655 static struct attribute *gl520_attributes_opt[] = {
 656         &sensor_dev_attr_in4_input.dev_attr.attr,
 657         &sensor_dev_attr_in4_min.dev_attr.attr,
 658         &sensor_dev_attr_in4_max.dev_attr.attr,
 659         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 660         &sensor_dev_attr_in4_beep.dev_attr.attr,
 661
 662         &sensor_dev_attr_temp2_input.dev_attr.attr,
 663         &sensor_dev_attr_temp2_max.dev_attr.attr,
 664         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 665         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 666         &sensor_dev_attr_temp2_beep.dev_attr.attr,
 667         NULL
 668 };
 669
 670 static const struct attribute_group gl520_group_opt = {
 671         .attrs = gl520_attributes_opt,
 672 };
 673
 674
 675 /*
 676  * Real code
 677  */
 678
 679 /* Return 0 if detection is successful, -ENODEV otherwise */
 680 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
 681 {
 682         struct i2c_adapter *adapter = client->adapter;
 683
 684         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 685                                      I2C_FUNC_SMBUS_WORD_DATA))
 686                 return -ENODEV;
 687
 688         /* Determine the chip type. */
 689         if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 690             ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 691             ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 692                 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 693                 return -ENODEV;
 694         }
 695
 696         strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
 697
 698         return 0;
 699 }
 700
 701 static int gl520_probe(struct i2c_client *client,
 702                        const struct i2c_device_id *id)
 703 {
 704         struct gl520_data *data;
 705         int err;
 706
 707         data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
 708         if (!data) {
 709                 err = -ENOMEM;
 710                 goto exit;
 711         }
 712
 713         i2c_set_clientdata(client, data);
 714         mutex_init(&data->update_lock);
 715
 716         /* Initialize the GL520SM chip */
 717         gl520_init_client(client);
 718
 719         /* Register sysfs hooks */
 720         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
 721                 goto exit_free;
 722
 723         if (data->two_temps) {
 724                 if ((err = device_create_file(&client->dev,
 725                                 &sensor_dev_attr_temp2_input.dev_attr))
 726                  || (err = device_create_file(&client->dev,
 727                                 &sensor_dev_attr_temp2_max.dev_attr))
 728                  || (err = device_create_file(&client->dev,
 729                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
 730                  || (err = device_create_file(&client->dev,
 731                                 &sensor_dev_attr_temp2_alarm.dev_attr))
 732                  || (err = device_create_file(&client->dev,
 733                                 &sensor_dev_attr_temp2_beep.dev_attr)))
 734                         goto exit_remove_files;
 735         } else {
 736                 if ((err = device_create_file(&client->dev,
 737                                 &sensor_dev_attr_in4_input.dev_attr))
 738                  || (err = device_create_file(&client->dev,
 739                                 &sensor_dev_attr_in4_min.dev_attr))
 740                  || (err = device_create_file(&client->dev,
 741                                 &sensor_dev_attr_in4_max.dev_attr))
 742                  || (err = device_create_file(&client->dev,
 743                                 &sensor_dev_attr_in4_alarm.dev_attr))
 744                  || (err = device_create_file(&client->dev,
 745                                 &sensor_dev_attr_in4_beep.dev_attr)))
 746                         goto exit_remove_files;
 747         }
 748
 749
 750         data->hwmon_dev = hwmon_device_register(&client->dev);
 751         if (IS_ERR(data->hwmon_dev)) {
 752                 err = PTR_ERR(data->hwmon_dev);
 753                 goto exit_remove_files;
 754         }
 755
 756         return 0;
 757
 758 exit_remove_files:
 759         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 760         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 761 exit_free:
 762         kfree(data);
 763 exit:
 764         return err;
 765 }
 766
 767
 768 /* Called when we have found a new GL520SM. */
 769 static void gl520_init_client(struct i2c_client *client)
 770 {
 771         struct gl520_data *data = i2c_get_clientdata(client);
 772         u8 oldconf, conf;
 773
 774         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 775
 776         data->alarm_mask = 0xff;
 777         data->vrm = vid_which_vrm();
 778
 779         if (extra_sensor_type == 1)
 780                 conf &= ~0x10;
 781         else if (extra_sensor_type == 2)
 782                 conf |= 0x10;
 783         data->two_temps = !(conf & 0x10);
 784
 785         /* If IRQ# is disabled, we can safely force comparator mode */
 786         if (!(conf & 0x20))
 787                 conf &= 0xf7;
 788
 789         /* Enable monitoring if needed */
 790         conf |= 0x40;
 791
 792         if (conf != oldconf)
 793                 gl520_write_value(client, GL520_REG_CONF, conf);
 794
 795         gl520_update_device(&(client->dev));
 796
 797         if (data->fan_min[0] == 0)
 798                 data->alarm_mask &= ~0x20;
 799         if (data->fan_min[1] == 0)
 800                 data->alarm_mask &= ~0x40;
 801
 802         data->beep_mask &= data->alarm_mask;
 803         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 804 }
 805
 806 static int gl520_remove(struct i2c_client *client)
 807 {
 808         struct gl520_data *data = i2c_get_clientdata(client);
 809
 810         hwmon_device_unregister(data->hwmon_dev);
 811         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 812         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 813
 814         kfree(data);
 815         return 0;
 816 }
 817
 818
 819 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 820    GL520 uses a high-byte first convention */
 821 static int gl520_read_value(struct i2c_client *client, u8 reg)
 822 {
 823         if ((reg >= 0x07) && (reg <= 0x0c))
 824                 return i2c_smbus_read_word_swapped(client, reg);
 825         else
 826                 return i2c_smbus_read_byte_data(client, reg);
 827 }
 828
 829 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 830 {
 831         if ((reg >= 0x07) && (reg <= 0x0c))
 832                 return i2c_smbus_write_word_swapped(client, reg, value);
 833         else
 834                 return i2c_smbus_write_byte_data(client, reg, value);
 835 }
 836
 837
 838 static struct gl520_data *gl520_update_device(struct device *dev)
 839 {
 840         struct i2c_client *client = to_i2c_client(dev);
 841         struct gl520_data *data = i2c_get_clientdata(client);
 842         int val, i;
 843
 844         mutex_lock(&data->update_lock);
 845
 846         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 847
 848                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 849
 850                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 851                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 852                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 853
 854                 for (i = 0; i < 4; i++) {
 855                         data->in_input[i] = gl520_read_value(client,
 856                                                         GL520_REG_IN_INPUT[i]);
 857                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 858                         data->in_min[i] = val & 0xff;
 859                         data->in_max[i] = (val >> 8) & 0xff;
 860                 }
 861
 862                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 863                 data->fan_input[0] = (val >> 8) & 0xff;
 864                 data->fan_input[1] = val & 0xff;
 865
 866                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 867                 data->fan_min[0] = (val >> 8) & 0xff;
 868                 data->fan_min[1] = val & 0xff;
 869
 870                 data->temp_input[0] = gl520_read_value(client,
 871                                                 GL520_REG_TEMP_INPUT[0]);
 872                 data->temp_max[0] = gl520_read_value(client,
 873                                                 GL520_REG_TEMP_MAX[0]);
 874                 data->temp_max_hyst[0] = gl520_read_value(client,
 875                                                 GL520_REG_TEMP_MAX_HYST[0]);
 876
 877                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 878                 data->fan_div[0] = (val >> 6) & 0x03;
 879                 data->fan_div[1] = (val >> 4) & 0x03;
 880                 data->fan_off = (val >> 2) & 0x01;
 881
 882                 data->alarms &= data->alarm_mask;
 883
 884                 val = gl520_read_value(client, GL520_REG_CONF);
 885                 data->beep_enable = !((val >> 2) & 1);
 886
 887                 /* Temp1 and Vin4 are the same input */
 888                 if (data->two_temps) {
 889                         data->temp_input[1] = gl520_read_value(client,
 890                                                 GL520_REG_TEMP_INPUT[1]);
 891                         data->temp_max[1] = gl520_read_value(client,
 892                                                 GL520_REG_TEMP_MAX[1]);
 893                         data->temp_max_hyst[1] = gl520_read_value(client,
 894                                                 GL520_REG_TEMP_MAX_HYST[1]);
 895                 } else {
 896                         data->in_input[4] = gl520_read_value(client,
 897                                                 GL520_REG_IN_INPUT[4]);
 898                         data->in_min[4] = gl520_read_value(client,
 899                                                 GL520_REG_IN_MIN[4]);
 900                         data->in_max[4] = gl520_read_value(client,
 901                                                 GL520_REG_IN_MAX[4]);
 902                 }
 903
 904                 data->last_updated = jiffies;
 905                 data->valid = 1;
 906         }
 907
 908         mutex_unlock(&data->update_lock);
 909
 910         return data;
 911 }
 912
 913
 914 static int __init sensors_gl520sm_init(void)
 915 {
 916         return i2c_add_driver(&gl520_driver);
 917 }
 918
 919 static void __exit sensors_gl520sm_exit(void)
 920 {
 921         i2c_del_driver(&gl520_driver);
 922 }
 923
 924
 925 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 926         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 927         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 928 MODULE_DESCRIPTION("GL520SM driver");
 929 MODULE_LICENSE("GPL");
 930
 931 module_init(sensors_gl520sm_init);
 932 module_exit(sensors_gl520sm_exit);