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 /* Insmod parameters */
  45 I2C_CLIENT_INSMOD_1(gl520sm);
  46
  47 /* Many GL520 constants specified below
  48 One of the inputs can be configured as either temp or voltage.
  49 That's why _TEMP2 and _IN4 access the same register
  50 */
  51
  52 /* The GL520 registers */
  53 #define GL520_REG_CHIP_ID               0x00
  54 #define GL520_REG_REVISION              0x01
  55 #define GL520_REG_CONF                  0x03
  56 #define GL520_REG_MASK                  0x11
  57
  58 #define GL520_REG_VID_INPUT             0x02
  59
  60 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
  61 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
  62 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
  63 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
  64
  65 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
  66 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
  67 static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
  68
  69 #define GL520_REG_FAN_INPUT             0x07
  70 #define GL520_REG_FAN_MIN               0x08
  71 #define GL520_REG_FAN_DIV               0x0f
  72 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  73
  74 #define GL520_REG_ALARMS                0x12
  75 #define GL520_REG_BEEP_MASK             0x10
  76 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  77
  78 /*
  79  * Function declarations
  80  */
  81
  82 static int gl520_attach_adapter(struct i2c_adapter *adapter);
  83 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
  84 static void gl520_init_client(struct i2c_client *client);
  85 static int gl520_detach_client(struct i2c_client *client);
  86 static int gl520_read_value(struct i2c_client *client, u8 reg);
  87 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
  88 static struct gl520_data *gl520_update_device(struct device *dev);
  89
  90 /* Driver data */
  91 static struct i2c_driver gl520_driver = {
  92         .driver = {
  93                 .name   = "gl520sm",
  94         },
  95         .attach_adapter = gl520_attach_adapter,
  96         .detach_client  = gl520_detach_client,
  97 };
  98
  99 /* Client data */
 100 struct gl520_data {
 101         struct i2c_client client;
 102         struct device *hwmon_dev;
 103         struct mutex update_lock;
 104         char valid;             /* zero until the following fields are valid */
 105         unsigned long last_updated;     /* in jiffies */
 106
 107         u8 vid;
 108         u8 vrm;
 109         u8 in_input[5];         /* [0] = VVD */
 110         u8 in_min[5];           /* [0] = VDD */
 111         u8 in_max[5];           /* [0] = VDD */
 112         u8 fan_input[2];
 113         u8 fan_min[2];
 114         u8 fan_div[2];
 115         u8 fan_off;
 116         u8 temp_input[2];
 117         u8 temp_max[2];
 118         u8 temp_max_hyst[2];
 119         u8 alarms;
 120         u8 beep_enable;
 121         u8 beep_mask;
 122         u8 alarm_mask;
 123         u8 two_temps;
 124 };
 125
 126 /*
 127  * Sysfs stuff
 128  */
 129
 130 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
 131                            char *buf)
 132 {
 133         struct gl520_data *data = gl520_update_device(dev);
 134         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 135 }
 136 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
 137
 138 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 139 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 140
 141 #define IN_FROM_REG(val) ((val)*19)
 142 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 143
 144 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
 145                             char *buf)
 146 {
 147         int n = to_sensor_dev_attr(attr)->index;
 148         struct gl520_data *data = gl520_update_device(dev);
 149         u8 r = data->in_input[n];
 150
 151         if (n == 0)
 152                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 153         else
 154                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 155 }
 156
 157 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
 158                           char *buf)
 159 {
 160         int n = to_sensor_dev_attr(attr)->index;
 161         struct gl520_data *data = gl520_update_device(dev);
 162         u8 r = data->in_min[n];
 163
 164         if (n == 0)
 165                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 166         else
 167                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 168 }
 169
 170 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
 171                           char *buf)
 172 {
 173         int n = to_sensor_dev_attr(attr)->index;
 174         struct gl520_data *data = gl520_update_device(dev);
 175         u8 r = data->in_max[n];
 176
 177         if (n == 0)
 178                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 179         else
 180                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 181 }
 182
 183 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 184                           const char *buf, size_t count)
 185 {
 186         struct i2c_client *client = to_i2c_client(dev);
 187         struct gl520_data *data = i2c_get_clientdata(client);
 188         int n = to_sensor_dev_attr(attr)->index;
 189         long v = simple_strtol(buf, NULL, 10);
 190         u8 r;
 191
 192         mutex_lock(&data->update_lock);
 193
 194         if (n == 0)
 195                 r = VDD_TO_REG(v);
 196         else
 197                 r = IN_TO_REG(v);
 198
 199         data->in_min[n] = r;
 200
 201         if (n < 4)
 202                 gl520_write_value(client, GL520_REG_IN_MIN[n],
 203                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
 204                                    & ~0xff) | r);
 205         else
 206                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 207
 208         mutex_unlock(&data->update_lock);
 209         return count;
 210 }
 211
 212 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 213                           const char *buf, size_t count)
 214 {
 215         struct i2c_client *client = to_i2c_client(dev);
 216         struct gl520_data *data = i2c_get_clientdata(client);
 217         int n = to_sensor_dev_attr(attr)->index;
 218         long v = simple_strtol(buf, NULL, 10);
 219         u8 r;
 220
 221         if (n == 0)
 222                 r = VDD_TO_REG(v);
 223         else
 224                 r = IN_TO_REG(v);
 225
 226         mutex_lock(&data->update_lock);
 227
 228         data->in_max[n] = r;
 229
 230         if (n < 4)
 231                 gl520_write_value(client, GL520_REG_IN_MAX[n],
 232                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
 233                                    & ~0xff00) | (r << 8));
 234         else
 235                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 236
 237         mutex_unlock(&data->update_lock);
 238         return count;
 239 }
 240
 241 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
 242 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
 243 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
 244 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
 245 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
 246 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
 247                 get_in_min, set_in_min, 0);
 248 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
 249                 get_in_min, set_in_min, 1);
 250 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
 251                 get_in_min, set_in_min, 2);
 252 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
 253                 get_in_min, set_in_min, 3);
 254 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
 255                 get_in_min, set_in_min, 4);
 256 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
 257                 get_in_max, set_in_max, 0);
 258 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
 259                 get_in_max, set_in_max, 1);
 260 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
 261                 get_in_max, set_in_max, 2);
 262 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
 263                 get_in_max, set_in_max, 3);
 264 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
 265                 get_in_max, set_in_max, 4);
 266
 267 #define DIV_FROM_REG(val) (1 << (val))
 268 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 269 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 270
 271 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
 272                              char *buf)
 273 {
 274         int n = to_sensor_dev_attr(attr)->index;
 275         struct gl520_data *data = gl520_update_device(dev);
 276
 277         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 278                                                  data->fan_div[n]));
 279 }
 280
 281 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
 282                            char *buf)
 283 {
 284         int n = to_sensor_dev_attr(attr)->index;
 285         struct gl520_data *data = gl520_update_device(dev);
 286
 287         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 288                                                  data->fan_div[n]));
 289 }
 290
 291 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
 292                            char *buf)
 293 {
 294         int n = to_sensor_dev_attr(attr)->index;
 295         struct gl520_data *data = gl520_update_device(dev);
 296
 297         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 298 }
 299
 300 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
 301                            char *buf)
 302 {
 303         struct gl520_data *data = gl520_update_device(dev);
 304         return sprintf(buf, "%d\n", data->fan_off);
 305 }
 306
 307 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 308                            const char *buf, size_t count)
 309 {
 310         struct i2c_client *client = to_i2c_client(dev);
 311         struct gl520_data *data = i2c_get_clientdata(client);
 312         int n = to_sensor_dev_attr(attr)->index;
 313         unsigned long v = simple_strtoul(buf, NULL, 10);
 314         u8 r;
 315
 316         mutex_lock(&data->update_lock);
 317         r = FAN_TO_REG(v, data->fan_div[n]);
 318         data->fan_min[n] = r;
 319
 320         if (n == 0)
 321                 gl520_write_value(client, GL520_REG_FAN_MIN,
 322                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 323                                    & ~0xff00) | (r << 8));
 324         else
 325                 gl520_write_value(client, GL520_REG_FAN_MIN,
 326                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 327                                    & ~0xff) | r);
 328
 329         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 330         if (data->fan_min[n] == 0)
 331                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 332         else
 333                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 334         data->beep_mask &= data->alarm_mask;
 335         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 336
 337         mutex_unlock(&data->update_lock);
 338         return count;
 339 }
 340
 341 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 342                            const char *buf, size_t count)
 343 {
 344         struct i2c_client *client = to_i2c_client(dev);
 345         struct gl520_data *data = i2c_get_clientdata(client);
 346         int n = to_sensor_dev_attr(attr)->index;
 347         unsigned long v = simple_strtoul(buf, NULL, 10);
 348         u8 r;
 349
 350         switch (v) {
 351         case 1: r = 0; break;
 352         case 2: r = 1; break;
 353         case 4: r = 2; break;
 354         case 8: r = 3; break;
 355         default:
 356                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 357                 return -EINVAL;
 358         }
 359
 360         mutex_lock(&data->update_lock);
 361         data->fan_div[n] = r;
 362
 363         if (n == 0)
 364                 gl520_write_value(client, GL520_REG_FAN_DIV,
 365                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 366                                    & ~0xc0) | (r << 6));
 367         else
 368                 gl520_write_value(client, GL520_REG_FAN_DIV,
 369                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 370                                    & ~0x30) | (r << 4));
 371
 372         mutex_unlock(&data->update_lock);
 373         return count;
 374 }
 375
 376 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
 377                            const char *buf, size_t count)
 378 {
 379         struct i2c_client *client = to_i2c_client(dev);
 380         struct gl520_data *data = i2c_get_clientdata(client);
 381         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 382
 383         mutex_lock(&data->update_lock);
 384         data->fan_off = r;
 385         gl520_write_value(client, GL520_REG_FAN_OFF,
 386                           (gl520_read_value(client, GL520_REG_FAN_OFF)
 387                            & ~0x0c) | (r << 2));
 388         mutex_unlock(&data->update_lock);
 389         return count;
 390 }
 391
 392 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
 393 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
 394 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 395                 get_fan_min, set_fan_min, 0);
 396 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 397                 get_fan_min, set_fan_min, 1);
 398 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 399                 get_fan_div, set_fan_div, 0);
 400 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 401                 get_fan_div, set_fan_div, 1);
 402 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
 403                 get_fan_off, set_fan_off);
 404
 405 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 406 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 407
 408 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
 409                               char *buf)
 410 {
 411         int n = to_sensor_dev_attr(attr)->index;
 412         struct gl520_data *data = gl520_update_device(dev);
 413
 414         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 415 }
 416
 417 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
 418                             char *buf)
 419 {
 420         int n = to_sensor_dev_attr(attr)->index;
 421         struct gl520_data *data = gl520_update_device(dev);
 422
 423         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 424 }
 425
 426 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
 427                                  *attr, char *buf)
 428 {
 429         int n = to_sensor_dev_attr(attr)->index;
 430         struct gl520_data *data = gl520_update_device(dev);
 431
 432         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 433 }
 434
 435 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 436                             const char *buf, size_t count)
 437 {
 438         struct i2c_client *client = to_i2c_client(dev);
 439         struct gl520_data *data = i2c_get_clientdata(client);
 440         int n = to_sensor_dev_attr(attr)->index;
 441         long v = simple_strtol(buf, NULL, 10);
 442
 443         mutex_lock(&data->update_lock);
 444         data->temp_max[n] = TEMP_TO_REG(v);
 445         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 446         mutex_unlock(&data->update_lock);
 447         return count;
 448 }
 449
 450 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
 451                                  *attr, const char *buf, size_t count)
 452 {
 453         struct i2c_client *client = to_i2c_client(dev);
 454         struct gl520_data *data = i2c_get_clientdata(client);
 455         int n = to_sensor_dev_attr(attr)->index;
 456         long v = simple_strtol(buf, NULL, 10);
 457
 458         mutex_lock(&data->update_lock);
 459         data->temp_max_hyst[n] = TEMP_TO_REG(v);
 460         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 461                           data->temp_max_hyst[n]);
 462         mutex_unlock(&data->update_lock);
 463         return count;
 464 }
 465
 466 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
 467 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
 468 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 469                 get_temp_max, set_temp_max, 0);
 470 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
 471                 get_temp_max, set_temp_max, 1);
 472 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 473                 get_temp_max_hyst, set_temp_max_hyst, 0);
 474 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
 475                 get_temp_max_hyst, set_temp_max_hyst, 1);
 476
 477 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
 478                           char *buf)
 479 {
 480         struct gl520_data *data = gl520_update_device(dev);
 481         return sprintf(buf, "%d\n", data->alarms);
 482 }
 483
 484 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
 485                                *attr, char *buf)
 486 {
 487         struct gl520_data *data = gl520_update_device(dev);
 488         return sprintf(buf, "%d\n", data->beep_enable);
 489 }
 490
 491 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
 492                              char *buf)
 493 {
 494         struct gl520_data *data = gl520_update_device(dev);
 495         return sprintf(buf, "%d\n", data->beep_mask);
 496 }
 497
 498 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
 499                                *attr, const char *buf, size_t count)
 500 {
 501         struct i2c_client *client = to_i2c_client(dev);
 502         struct gl520_data *data = i2c_get_clientdata(client);
 503         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 504
 505         mutex_lock(&data->update_lock);
 506         data->beep_enable = !r;
 507         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 508                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 509                            & ~0x04) | (r << 2));
 510         mutex_unlock(&data->update_lock);
 511         return count;
 512 }
 513
 514 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
 515                              const char *buf, size_t count)
 516 {
 517         struct i2c_client *client = to_i2c_client(dev);
 518         struct gl520_data *data = i2c_get_clientdata(client);
 519         u8 r = simple_strtoul(buf, NULL, 10);
 520
 521         mutex_lock(&data->update_lock);
 522         r &= data->alarm_mask;
 523         data->beep_mask = r;
 524         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 525         mutex_unlock(&data->update_lock);
 526         return count;
 527 }
 528
 529 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 530 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 531                 get_beep_enable, set_beep_enable);
 532 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 533                 get_beep_mask, set_beep_mask);
 534
 535 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
 536                          char *buf)
 537 {
 538         int bit_nr = to_sensor_dev_attr(attr)->index;
 539         struct gl520_data *data = gl520_update_device(dev);
 540
 541         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 542 }
 543
 544 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
 545 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
 546 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
 547 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
 548 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
 549 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
 550 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
 551 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
 552 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
 553
 554 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
 555                         char *buf)
 556 {
 557         int bitnr = to_sensor_dev_attr(attr)->index;
 558         struct gl520_data *data = gl520_update_device(dev);
 559
 560         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 561 }
 562
 563 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 564                         const char *buf, size_t count)
 565 {
 566         struct i2c_client *client = to_i2c_client(dev);
 567         struct gl520_data *data = i2c_get_clientdata(client);
 568         int bitnr = to_sensor_dev_attr(attr)->index;
 569         unsigned long bit;
 570
 571         bit = simple_strtoul(buf, NULL, 10);
 572         if (bit & ~1)
 573                 return -EINVAL;
 574
 575         mutex_lock(&data->update_lock);
 576         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 577         if (bit)
 578                 data->beep_mask |= (1 << bitnr);
 579         else
 580                 data->beep_mask &= ~(1 << bitnr);
 581         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 582         mutex_unlock(&data->update_lock);
 583         return count;
 584 }
 585
 586 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
 587 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
 588 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
 589 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
 590 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
 591 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
 592 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
 593 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 594 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 595
 596 static struct attribute *gl520_attributes[] = {
 597         &dev_attr_cpu0_vid.attr,
 598
 599         &sensor_dev_attr_in0_input.dev_attr.attr,
 600         &sensor_dev_attr_in0_min.dev_attr.attr,
 601         &sensor_dev_attr_in0_max.dev_attr.attr,
 602         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 603         &sensor_dev_attr_in0_beep.dev_attr.attr,
 604         &sensor_dev_attr_in1_input.dev_attr.attr,
 605         &sensor_dev_attr_in1_min.dev_attr.attr,
 606         &sensor_dev_attr_in1_max.dev_attr.attr,
 607         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 608         &sensor_dev_attr_in1_beep.dev_attr.attr,
 609         &sensor_dev_attr_in2_input.dev_attr.attr,
 610         &sensor_dev_attr_in2_min.dev_attr.attr,
 611         &sensor_dev_attr_in2_max.dev_attr.attr,
 612         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 613         &sensor_dev_attr_in2_beep.dev_attr.attr,
 614         &sensor_dev_attr_in3_input.dev_attr.attr,
 615         &sensor_dev_attr_in3_min.dev_attr.attr,
 616         &sensor_dev_attr_in3_max.dev_attr.attr,
 617         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 618         &sensor_dev_attr_in3_beep.dev_attr.attr,
 619
 620         &sensor_dev_attr_fan1_input.dev_attr.attr,
 621         &sensor_dev_attr_fan1_min.dev_attr.attr,
 622         &sensor_dev_attr_fan1_div.dev_attr.attr,
 623         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 624         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 625         &dev_attr_fan1_off.attr,
 626         &sensor_dev_attr_fan2_input.dev_attr.attr,
 627         &sensor_dev_attr_fan2_min.dev_attr.attr,
 628         &sensor_dev_attr_fan2_div.dev_attr.attr,
 629         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 630         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 631
 632         &sensor_dev_attr_temp1_input.dev_attr.attr,
 633         &sensor_dev_attr_temp1_max.dev_attr.attr,
 634         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 635         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 636         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 637
 638         &dev_attr_alarms.attr,
 639         &dev_attr_beep_enable.attr,
 640         &dev_attr_beep_mask.attr,
 641         NULL
 642 };
 643
 644 static const struct attribute_group gl520_group = {
 645         .attrs = gl520_attributes,
 646 };
 647
 648 static struct attribute *gl520_attributes_opt[] = {
 649         &sensor_dev_attr_in4_input.dev_attr.attr,
 650         &sensor_dev_attr_in4_min.dev_attr.attr,
 651         &sensor_dev_attr_in4_max.dev_attr.attr,
 652         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 653         &sensor_dev_attr_in4_beep.dev_attr.attr,
 654
 655         &sensor_dev_attr_temp2_input.dev_attr.attr,
 656         &sensor_dev_attr_temp2_max.dev_attr.attr,
 657         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 658         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 659         &sensor_dev_attr_temp2_beep.dev_attr.attr,
 660         NULL
 661 };
 662
 663 static const struct attribute_group gl520_group_opt = {
 664         .attrs = gl520_attributes_opt,
 665 };
 666
 667
 668 /*
 669  * Real code
 670  */
 671
 672 static int gl520_attach_adapter(struct i2c_adapter *adapter)
 673 {
 674         if (!(adapter->class & I2C_CLASS_HWMON))
 675                 return 0;
 676         return i2c_probe(adapter, &addr_data, gl520_detect);
 677 }
 678
 679 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
 680 {
 681         struct i2c_client *client;
 682         struct gl520_data *data;
 683         int err = 0;
 684
 685         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 686                                      I2C_FUNC_SMBUS_WORD_DATA))
 687                 goto exit;
 688
 689         /* OK. For now, we presume we have a valid client. We now create the
 690            client structure, even though we cannot fill it completely yet.
 691            But it allows us to access gl520_{read,write}_value. */
 692
 693         if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
 694                 err = -ENOMEM;
 695                 goto exit;
 696         }
 697
 698         client = &data->client;
 699         i2c_set_clientdata(client, data);
 700         client->addr = address;
 701         client->adapter = adapter;
 702         client->driver = &gl520_driver;
 703
 704         /* Determine the chip type. */
 705         if (kind < 0) {
 706                 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 707                     ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 708                     ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 709                         dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 710                         goto exit_free;
 711                 }
 712         }
 713
 714         /* Fill in the remaining client fields */
 715         strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
 716         mutex_init(&data->update_lock);
 717
 718         /* Tell the I2C layer a new client has arrived */
 719         if ((err = i2c_attach_client(client)))
 720                 goto exit_free;
 721
 722         /* Initialize the GL520SM chip */
 723         gl520_init_client(client);
 724
 725         /* Register sysfs hooks */
 726         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
 727                 goto exit_detach;
 728
 729         if (data->two_temps) {
 730                 if ((err = device_create_file(&client->dev,
 731                                 &sensor_dev_attr_temp2_input.dev_attr))
 732                  || (err = device_create_file(&client->dev,
 733                                 &sensor_dev_attr_temp2_max.dev_attr))
 734                  || (err = device_create_file(&client->dev,
 735                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
 736                  || (err = device_create_file(&client->dev,
 737                                 &sensor_dev_attr_temp2_alarm.dev_attr))
 738                  || (err = device_create_file(&client->dev,
 739                                 &sensor_dev_attr_temp2_beep.dev_attr)))
 740                         goto exit_remove_files;
 741         } else {
 742                 if ((err = device_create_file(&client->dev,
 743                                 &sensor_dev_attr_in4_input.dev_attr))
 744                  || (err = device_create_file(&client->dev,
 745                                 &sensor_dev_attr_in4_min.dev_attr))
 746                  || (err = device_create_file(&client->dev,
 747                                 &sensor_dev_attr_in4_max.dev_attr))
 748                  || (err = device_create_file(&client->dev,
 749                                 &sensor_dev_attr_in4_alarm.dev_attr))
 750                  || (err = device_create_file(&client->dev,
 751                                 &sensor_dev_attr_in4_beep.dev_attr)))
 752                         goto exit_remove_files;
 753         }
 754
 755
 756         data->hwmon_dev = hwmon_device_register(&client->dev);
 757         if (IS_ERR(data->hwmon_dev)) {
 758                 err = PTR_ERR(data->hwmon_dev);
 759                 goto exit_remove_files;
 760         }
 761
 762         return 0;
 763
 764 exit_remove_files:
 765         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 766         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 767 exit_detach:
 768         i2c_detach_client(client);
 769 exit_free:
 770         kfree(data);
 771 exit:
 772         return err;
 773 }
 774
 775
 776 /* Called when we have found a new GL520SM. */
 777 static void gl520_init_client(struct i2c_client *client)
 778 {
 779         struct gl520_data *data = i2c_get_clientdata(client);
 780         u8 oldconf, conf;
 781
 782         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 783
 784         data->alarm_mask = 0xff;
 785         data->vrm = vid_which_vrm();
 786
 787         if (extra_sensor_type == 1)
 788                 conf &= ~0x10;
 789         else if (extra_sensor_type == 2)
 790                 conf |= 0x10;
 791         data->two_temps = !(conf & 0x10);
 792
 793         /* If IRQ# is disabled, we can safely force comparator mode */
 794         if (!(conf & 0x20))
 795                 conf &= 0xf7;
 796
 797         /* Enable monitoring if needed */
 798         conf |= 0x40;
 799
 800         if (conf != oldconf)
 801                 gl520_write_value(client, GL520_REG_CONF, conf);
 802
 803         gl520_update_device(&(client->dev));
 804
 805         if (data->fan_min[0] == 0)
 806                 data->alarm_mask &= ~0x20;
 807         if (data->fan_min[1] == 0)
 808                 data->alarm_mask &= ~0x40;
 809
 810         data->beep_mask &= data->alarm_mask;
 811         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 812 }
 813
 814 static int gl520_detach_client(struct i2c_client *client)
 815 {
 816         struct gl520_data *data = i2c_get_clientdata(client);
 817         int err;
 818
 819         hwmon_device_unregister(data->hwmon_dev);
 820         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 821         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 822
 823         if ((err = i2c_detach_client(client)))
 824                 return err;
 825
 826         kfree(data);
 827         return 0;
 828 }
 829
 830
 831 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 832    GL520 uses a high-byte first convention */
 833 static int gl520_read_value(struct i2c_client *client, u8 reg)
 834 {
 835         if ((reg >= 0x07) && (reg <= 0x0c))
 836                 return swab16(i2c_smbus_read_word_data(client, reg));
 837         else
 838                 return i2c_smbus_read_byte_data(client, reg);
 839 }
 840
 841 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 842 {
 843         if ((reg >= 0x07) && (reg <= 0x0c))
 844                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 845         else
 846                 return i2c_smbus_write_byte_data(client, reg, value);
 847 }
 848
 849
 850 static struct gl520_data *gl520_update_device(struct device *dev)
 851 {
 852         struct i2c_client *client = to_i2c_client(dev);
 853         struct gl520_data *data = i2c_get_clientdata(client);
 854         int val, i;
 855
 856         mutex_lock(&data->update_lock);
 857
 858         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 859
 860                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 861
 862                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 863                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 864                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 865
 866                 for (i = 0; i < 4; i++) {
 867                         data->in_input[i] = gl520_read_value(client,
 868                                                         GL520_REG_IN_INPUT[i]);
 869                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 870                         data->in_min[i] = val & 0xff;
 871                         data->in_max[i] = (val >> 8) & 0xff;
 872                 }
 873
 874                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 875                 data->fan_input[0] = (val >> 8) & 0xff;
 876                 data->fan_input[1] = val & 0xff;
 877
 878                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 879                 data->fan_min[0] = (val >> 8) & 0xff;
 880                 data->fan_min[1] = val & 0xff;
 881
 882                 data->temp_input[0] = gl520_read_value(client,
 883                                                 GL520_REG_TEMP_INPUT[0]);
 884                 data->temp_max[0] = gl520_read_value(client,
 885                                                 GL520_REG_TEMP_MAX[0]);
 886                 data->temp_max_hyst[0] = gl520_read_value(client,
 887                                                 GL520_REG_TEMP_MAX_HYST[0]);
 888
 889                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 890                 data->fan_div[0] = (val >> 6) & 0x03;
 891                 data->fan_div[1] = (val >> 4) & 0x03;
 892                 data->fan_off = (val >> 2) & 0x01;
 893
 894                 data->alarms &= data->alarm_mask;
 895
 896                 val = gl520_read_value(client, GL520_REG_CONF);
 897                 data->beep_enable = !((val >> 2) & 1);
 898
 899                 /* Temp1 and Vin4 are the same input */
 900                 if (data->two_temps) {
 901                         data->temp_input[1] = gl520_read_value(client,
 902                                                 GL520_REG_TEMP_INPUT[1]);
 903                         data->temp_max[1] = gl520_read_value(client,
 904                                                 GL520_REG_TEMP_MAX[1]);
 905                         data->temp_max_hyst[1] = gl520_read_value(client,
 906                                                 GL520_REG_TEMP_MAX_HYST[1]);
 907                 } else {
 908                         data->in_input[4] = gl520_read_value(client,
 909                                                 GL520_REG_IN_INPUT[4]);
 910                         data->in_min[4] = gl520_read_value(client,
 911                                                 GL520_REG_IN_MIN[4]);
 912                         data->in_max[4] = gl520_read_value(client,
 913                                                 GL520_REG_IN_MAX[4]);
 914                 }
 915
 916                 data->last_updated = jiffies;
 917                 data->valid = 1;
 918         }
 919
 920         mutex_unlock(&data->update_lock);
 921
 922         return data;
 923 }
 924
 925
 926 static int __init sensors_gl520sm_init(void)
 927 {
 928         return i2c_add_driver(&gl520_driver);
 929 }
 930
 931 static void __exit sensors_gl520sm_exit(void)
 932 {
 933         i2c_del_driver(&gl520_driver);
 934 }
 935
 936
 937 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 938         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 939         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 940 MODULE_DESCRIPTION("GL520SM driver");
 941 MODULE_LICENSE("GPL");
 942
 943 module_init(sensors_gl520sm_init);
 944 module_exit(sensors_gl520sm_exit);