SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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_probe(struct i2c_client *client,
  83                        const struct i2c_device_id *id);
  84 static int gl520_detect(struct i2c_client *client, int kind,
  85                         struct i2c_board_info *info);
  86 static void gl520_init_client(struct i2c_client *client);
  87 static int gl520_remove(struct i2c_client *client);
  88 static int gl520_read_value(struct i2c_client *client, u8 reg);
  89 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
  90 static struct gl520_data *gl520_update_device(struct device *dev);
  91
  92 /* Driver data */
  93 static const struct i2c_device_id gl520_id[] = {
  94         { "gl520sm", gl520sm },
  95         { }
  96 };
  97 MODULE_DEVICE_TABLE(i2c, gl520_id);
  98
  99 static struct i2c_driver gl520_driver = {
 100         .class          = I2C_CLASS_HWMON,
 101         .driver = {
 102                 .name   = "gl520sm",
 103         },
 104         .probe          = gl520_probe,
 105         .remove         = gl520_remove,
 106         .id_table       = gl520_id,
 107         .detect         = gl520_detect,
 108         .address_data   = &addr_data,
 109 };
 110
 111 /* Client data */
 112 struct gl520_data {
 113         struct device *hwmon_dev;
 114         struct mutex update_lock;
 115         char valid;             /* zero until the following fields are valid */
 116         unsigned long last_updated;     /* in jiffies */
 117
 118         u8 vid;
 119         u8 vrm;
 120         u8 in_input[5];         /* [0] = VVD */
 121         u8 in_min[5];           /* [0] = VDD */
 122         u8 in_max[5];           /* [0] = VDD */
 123         u8 fan_input[2];
 124         u8 fan_min[2];
 125         u8 fan_div[2];
 126         u8 fan_off;
 127         u8 temp_input[2];
 128         u8 temp_max[2];
 129         u8 temp_max_hyst[2];
 130         u8 alarms;
 131         u8 beep_enable;
 132         u8 beep_mask;
 133         u8 alarm_mask;
 134         u8 two_temps;
 135 };
 136
 137 /*
 138  * Sysfs stuff
 139  */
 140
 141 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
 142                            char *buf)
 143 {
 144         struct gl520_data *data = gl520_update_device(dev);
 145         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 146 }
 147 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
 148
 149 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 150 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 151
 152 #define IN_FROM_REG(val) ((val)*19)
 153 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 154
 155 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
 156                             char *buf)
 157 {
 158         int n = to_sensor_dev_attr(attr)->index;
 159         struct gl520_data *data = gl520_update_device(dev);
 160         u8 r = data->in_input[n];
 161
 162         if (n == 0)
 163                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 164         else
 165                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 166 }
 167
 168 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
 169                           char *buf)
 170 {
 171         int n = to_sensor_dev_attr(attr)->index;
 172         struct gl520_data *data = gl520_update_device(dev);
 173         u8 r = data->in_min[n];
 174
 175         if (n == 0)
 176                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 177         else
 178                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 179 }
 180
 181 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
 182                           char *buf)
 183 {
 184         int n = to_sensor_dev_attr(attr)->index;
 185         struct gl520_data *data = gl520_update_device(dev);
 186         u8 r = data->in_max[n];
 187
 188         if (n == 0)
 189                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 190         else
 191                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 192 }
 193
 194 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 195                           const char *buf, size_t count)
 196 {
 197         struct i2c_client *client = to_i2c_client(dev);
 198         struct gl520_data *data = i2c_get_clientdata(client);
 199         int n = to_sensor_dev_attr(attr)->index;
 200         long v = simple_strtol(buf, NULL, 10);
 201         u8 r;
 202
 203         mutex_lock(&data->update_lock);
 204
 205         if (n == 0)
 206                 r = VDD_TO_REG(v);
 207         else
 208                 r = IN_TO_REG(v);
 209
 210         data->in_min[n] = r;
 211
 212         if (n < 4)
 213                 gl520_write_value(client, GL520_REG_IN_MIN[n],
 214                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
 215                                    & ~0xff) | r);
 216         else
 217                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 218
 219         mutex_unlock(&data->update_lock);
 220         return count;
 221 }
 222
 223 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 224                           const char *buf, size_t count)
 225 {
 226         struct i2c_client *client = to_i2c_client(dev);
 227         struct gl520_data *data = i2c_get_clientdata(client);
 228         int n = to_sensor_dev_attr(attr)->index;
 229         long v = simple_strtol(buf, NULL, 10);
 230         u8 r;
 231
 232         if (n == 0)
 233                 r = VDD_TO_REG(v);
 234         else
 235                 r = IN_TO_REG(v);
 236
 237         mutex_lock(&data->update_lock);
 238
 239         data->in_max[n] = r;
 240
 241         if (n < 4)
 242                 gl520_write_value(client, GL520_REG_IN_MAX[n],
 243                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
 244                                    & ~0xff00) | (r << 8));
 245         else
 246                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 247
 248         mutex_unlock(&data->update_lock);
 249         return count;
 250 }
 251
 252 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
 253 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
 254 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
 255 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
 256 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
 257 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
 258                 get_in_min, set_in_min, 0);
 259 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
 260                 get_in_min, set_in_min, 1);
 261 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
 262                 get_in_min, set_in_min, 2);
 263 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
 264                 get_in_min, set_in_min, 3);
 265 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
 266                 get_in_min, set_in_min, 4);
 267 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
 268                 get_in_max, set_in_max, 0);
 269 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
 270                 get_in_max, set_in_max, 1);
 271 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
 272                 get_in_max, set_in_max, 2);
 273 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
 274                 get_in_max, set_in_max, 3);
 275 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
 276                 get_in_max, set_in_max, 4);
 277
 278 #define DIV_FROM_REG(val) (1 << (val))
 279 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 280 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 281
 282 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
 283                              char *buf)
 284 {
 285         int n = to_sensor_dev_attr(attr)->index;
 286         struct gl520_data *data = gl520_update_device(dev);
 287
 288         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 289                                                  data->fan_div[n]));
 290 }
 291
 292 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
 293                            char *buf)
 294 {
 295         int n = to_sensor_dev_attr(attr)->index;
 296         struct gl520_data *data = gl520_update_device(dev);
 297
 298         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 299                                                  data->fan_div[n]));
 300 }
 301
 302 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
 303                            char *buf)
 304 {
 305         int n = to_sensor_dev_attr(attr)->index;
 306         struct gl520_data *data = gl520_update_device(dev);
 307
 308         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 309 }
 310
 311 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
 312                            char *buf)
 313 {
 314         struct gl520_data *data = gl520_update_device(dev);
 315         return sprintf(buf, "%d\n", data->fan_off);
 316 }
 317
 318 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 319                            const char *buf, size_t count)
 320 {
 321         struct i2c_client *client = to_i2c_client(dev);
 322         struct gl520_data *data = i2c_get_clientdata(client);
 323         int n = to_sensor_dev_attr(attr)->index;
 324         unsigned long v = simple_strtoul(buf, NULL, 10);
 325         u8 r;
 326
 327         mutex_lock(&data->update_lock);
 328         r = FAN_TO_REG(v, data->fan_div[n]);
 329         data->fan_min[n] = r;
 330
 331         if (n == 0)
 332                 gl520_write_value(client, GL520_REG_FAN_MIN,
 333                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 334                                    & ~0xff00) | (r << 8));
 335         else
 336                 gl520_write_value(client, GL520_REG_FAN_MIN,
 337                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 338                                    & ~0xff) | r);
 339
 340         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 341         if (data->fan_min[n] == 0)
 342                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 343         else
 344                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 345         data->beep_mask &= data->alarm_mask;
 346         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 347
 348         mutex_unlock(&data->update_lock);
 349         return count;
 350 }
 351
 352 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 353                            const char *buf, size_t count)
 354 {
 355         struct i2c_client *client = to_i2c_client(dev);
 356         struct gl520_data *data = i2c_get_clientdata(client);
 357         int n = to_sensor_dev_attr(attr)->index;
 358         unsigned long v = simple_strtoul(buf, NULL, 10);
 359         u8 r;
 360
 361         switch (v) {
 362         case 1: r = 0; break;
 363         case 2: r = 1; break;
 364         case 4: r = 2; break;
 365         case 8: r = 3; break;
 366         default:
 367                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 368                 return -EINVAL;
 369         }
 370
 371         mutex_lock(&data->update_lock);
 372         data->fan_div[n] = r;
 373
 374         if (n == 0)
 375                 gl520_write_value(client, GL520_REG_FAN_DIV,
 376                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 377                                    & ~0xc0) | (r << 6));
 378         else
 379                 gl520_write_value(client, GL520_REG_FAN_DIV,
 380                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 381                                    & ~0x30) | (r << 4));
 382
 383         mutex_unlock(&data->update_lock);
 384         return count;
 385 }
 386
 387 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
 388                            const char *buf, size_t count)
 389 {
 390         struct i2c_client *client = to_i2c_client(dev);
 391         struct gl520_data *data = i2c_get_clientdata(client);
 392         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 393
 394         mutex_lock(&data->update_lock);
 395         data->fan_off = r;
 396         gl520_write_value(client, GL520_REG_FAN_OFF,
 397                           (gl520_read_value(client, GL520_REG_FAN_OFF)
 398                            & ~0x0c) | (r << 2));
 399         mutex_unlock(&data->update_lock);
 400         return count;
 401 }
 402
 403 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
 404 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
 405 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 406                 get_fan_min, set_fan_min, 0);
 407 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 408                 get_fan_min, set_fan_min, 1);
 409 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 410                 get_fan_div, set_fan_div, 0);
 411 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 412                 get_fan_div, set_fan_div, 1);
 413 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
 414                 get_fan_off, set_fan_off);
 415
 416 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 417 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 418
 419 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
 420                               char *buf)
 421 {
 422         int n = to_sensor_dev_attr(attr)->index;
 423         struct gl520_data *data = gl520_update_device(dev);
 424
 425         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 426 }
 427
 428 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
 429                             char *buf)
 430 {
 431         int n = to_sensor_dev_attr(attr)->index;
 432         struct gl520_data *data = gl520_update_device(dev);
 433
 434         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 435 }
 436
 437 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
 438                                  *attr, char *buf)
 439 {
 440         int n = to_sensor_dev_attr(attr)->index;
 441         struct gl520_data *data = gl520_update_device(dev);
 442
 443         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 444 }
 445
 446 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 447                             const char *buf, size_t count)
 448 {
 449         struct i2c_client *client = to_i2c_client(dev);
 450         struct gl520_data *data = i2c_get_clientdata(client);
 451         int n = to_sensor_dev_attr(attr)->index;
 452         long v = simple_strtol(buf, NULL, 10);
 453
 454         mutex_lock(&data->update_lock);
 455         data->temp_max[n] = TEMP_TO_REG(v);
 456         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 457         mutex_unlock(&data->update_lock);
 458         return count;
 459 }
 460
 461 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
 462                                  *attr, const char *buf, size_t count)
 463 {
 464         struct i2c_client *client = to_i2c_client(dev);
 465         struct gl520_data *data = i2c_get_clientdata(client);
 466         int n = to_sensor_dev_attr(attr)->index;
 467         long v = simple_strtol(buf, NULL, 10);
 468
 469         mutex_lock(&data->update_lock);
 470         data->temp_max_hyst[n] = TEMP_TO_REG(v);
 471         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 472                           data->temp_max_hyst[n]);
 473         mutex_unlock(&data->update_lock);
 474         return count;
 475 }
 476
 477 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
 478 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
 479 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 480                 get_temp_max, set_temp_max, 0);
 481 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
 482                 get_temp_max, set_temp_max, 1);
 483 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 484                 get_temp_max_hyst, set_temp_max_hyst, 0);
 485 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
 486                 get_temp_max_hyst, set_temp_max_hyst, 1);
 487
 488 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
 489                           char *buf)
 490 {
 491         struct gl520_data *data = gl520_update_device(dev);
 492         return sprintf(buf, "%d\n", data->alarms);
 493 }
 494
 495 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
 496                                *attr, char *buf)
 497 {
 498         struct gl520_data *data = gl520_update_device(dev);
 499         return sprintf(buf, "%d\n", data->beep_enable);
 500 }
 501
 502 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
 503                              char *buf)
 504 {
 505         struct gl520_data *data = gl520_update_device(dev);
 506         return sprintf(buf, "%d\n", data->beep_mask);
 507 }
 508
 509 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
 510                                *attr, const char *buf, size_t count)
 511 {
 512         struct i2c_client *client = to_i2c_client(dev);
 513         struct gl520_data *data = i2c_get_clientdata(client);
 514         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 515
 516         mutex_lock(&data->update_lock);
 517         data->beep_enable = !r;
 518         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 519                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 520                            & ~0x04) | (r << 2));
 521         mutex_unlock(&data->update_lock);
 522         return count;
 523 }
 524
 525 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
 526                              const char *buf, size_t count)
 527 {
 528         struct i2c_client *client = to_i2c_client(dev);
 529         struct gl520_data *data = i2c_get_clientdata(client);
 530         u8 r = simple_strtoul(buf, NULL, 10);
 531
 532         mutex_lock(&data->update_lock);
 533         r &= data->alarm_mask;
 534         data->beep_mask = r;
 535         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 536         mutex_unlock(&data->update_lock);
 537         return count;
 538 }
 539
 540 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 541 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 542                 get_beep_enable, set_beep_enable);
 543 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 544                 get_beep_mask, set_beep_mask);
 545
 546 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
 547                          char *buf)
 548 {
 549         int bit_nr = to_sensor_dev_attr(attr)->index;
 550         struct gl520_data *data = gl520_update_device(dev);
 551
 552         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 553 }
 554
 555 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
 556 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
 557 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
 558 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
 559 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
 560 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
 561 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
 562 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
 563 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
 564
 565 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
 566                         char *buf)
 567 {
 568         int bitnr = to_sensor_dev_attr(attr)->index;
 569         struct gl520_data *data = gl520_update_device(dev);
 570
 571         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 572 }
 573
 574 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 575                         const char *buf, size_t count)
 576 {
 577         struct i2c_client *client = to_i2c_client(dev);
 578         struct gl520_data *data = i2c_get_clientdata(client);
 579         int bitnr = to_sensor_dev_attr(attr)->index;
 580         unsigned long bit;
 581
 582         bit = simple_strtoul(buf, NULL, 10);
 583         if (bit & ~1)
 584                 return -EINVAL;
 585
 586         mutex_lock(&data->update_lock);
 587         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 588         if (bit)
 589                 data->beep_mask |= (1 << bitnr);
 590         else
 591                 data->beep_mask &= ~(1 << bitnr);
 592         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 593         mutex_unlock(&data->update_lock);
 594         return count;
 595 }
 596
 597 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
 598 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
 599 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
 600 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
 601 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
 602 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
 603 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
 604 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 605 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 606
 607 static struct attribute *gl520_attributes[] = {
 608         &dev_attr_cpu0_vid.attr,
 609
 610         &sensor_dev_attr_in0_input.dev_attr.attr,
 611         &sensor_dev_attr_in0_min.dev_attr.attr,
 612         &sensor_dev_attr_in0_max.dev_attr.attr,
 613         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 614         &sensor_dev_attr_in0_beep.dev_attr.attr,
 615         &sensor_dev_attr_in1_input.dev_attr.attr,
 616         &sensor_dev_attr_in1_min.dev_attr.attr,
 617         &sensor_dev_attr_in1_max.dev_attr.attr,
 618         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 619         &sensor_dev_attr_in1_beep.dev_attr.attr,
 620         &sensor_dev_attr_in2_input.dev_attr.attr,
 621         &sensor_dev_attr_in2_min.dev_attr.attr,
 622         &sensor_dev_attr_in2_max.dev_attr.attr,
 623         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 624         &sensor_dev_attr_in2_beep.dev_attr.attr,
 625         &sensor_dev_attr_in3_input.dev_attr.attr,
 626         &sensor_dev_attr_in3_min.dev_attr.attr,
 627         &sensor_dev_attr_in3_max.dev_attr.attr,
 628         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 629         &sensor_dev_attr_in3_beep.dev_attr.attr,
 630
 631         &sensor_dev_attr_fan1_input.dev_attr.attr,
 632         &sensor_dev_attr_fan1_min.dev_attr.attr,
 633         &sensor_dev_attr_fan1_div.dev_attr.attr,
 634         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 635         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 636         &dev_attr_fan1_off.attr,
 637         &sensor_dev_attr_fan2_input.dev_attr.attr,
 638         &sensor_dev_attr_fan2_min.dev_attr.attr,
 639         &sensor_dev_attr_fan2_div.dev_attr.attr,
 640         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 641         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 642
 643         &sensor_dev_attr_temp1_input.dev_attr.attr,
 644         &sensor_dev_attr_temp1_max.dev_attr.attr,
 645         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 646         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 647         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 648
 649         &dev_attr_alarms.attr,
 650         &dev_attr_beep_enable.attr,
 651         &dev_attr_beep_mask.attr,
 652         NULL
 653 };
 654
 655 static const struct attribute_group gl520_group = {
 656         .attrs = gl520_attributes,
 657 };
 658
 659 static struct attribute *gl520_attributes_opt[] = {
 660         &sensor_dev_attr_in4_input.dev_attr.attr,
 661         &sensor_dev_attr_in4_min.dev_attr.attr,
 662         &sensor_dev_attr_in4_max.dev_attr.attr,
 663         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 664         &sensor_dev_attr_in4_beep.dev_attr.attr,
 665
 666         &sensor_dev_attr_temp2_input.dev_attr.attr,
 667         &sensor_dev_attr_temp2_max.dev_attr.attr,
 668         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 669         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 670         &sensor_dev_attr_temp2_beep.dev_attr.attr,
 671         NULL
 672 };
 673
 674 static const struct attribute_group gl520_group_opt = {
 675         .attrs = gl520_attributes_opt,
 676 };
 677
 678
 679 /*
 680  * Real code
 681  */
 682
 683 /* Return 0 if detection is successful, -ENODEV otherwise */
 684 static int gl520_detect(struct i2c_client *client, int kind,
 685                         struct i2c_board_info *info)
 686 {
 687         struct i2c_adapter *adapter = client->adapter;
 688
 689         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 690                                      I2C_FUNC_SMBUS_WORD_DATA))
 691                 return -ENODEV;
 692
 693         /* Determine the chip type. */
 694         if (kind < 0) {
 695                 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 696                     ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 697                     ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 698                         dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 699                         return -ENODEV;
 700                 }
 701         }
 702
 703         strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
 704
 705         return 0;
 706 }
 707
 708 static int gl520_probe(struct i2c_client *client,
 709                        const struct i2c_device_id *id)
 710 {
 711         struct gl520_data *data;
 712         int err;
 713
 714         data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
 715         if (!data) {
 716                 err = -ENOMEM;
 717                 goto exit;
 718         }
 719
 720         i2c_set_clientdata(client, data);
 721         mutex_init(&data->update_lock);
 722
 723         /* Initialize the GL520SM chip */
 724         gl520_init_client(client);
 725
 726         /* Register sysfs hooks */
 727         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
 728                 goto exit_free;
 729
 730         if (data->two_temps) {
 731                 if ((err = device_create_file(&client->dev,
 732                                 &sensor_dev_attr_temp2_input.dev_attr))
 733                  || (err = device_create_file(&client->dev,
 734                                 &sensor_dev_attr_temp2_max.dev_attr))
 735                  || (err = device_create_file(&client->dev,
 736                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
 737                  || (err = device_create_file(&client->dev,
 738                                 &sensor_dev_attr_temp2_alarm.dev_attr))
 739                  || (err = device_create_file(&client->dev,
 740                                 &sensor_dev_attr_temp2_beep.dev_attr)))
 741                         goto exit_remove_files;
 742         } else {
 743                 if ((err = device_create_file(&client->dev,
 744                                 &sensor_dev_attr_in4_input.dev_attr))
 745                  || (err = device_create_file(&client->dev,
 746                                 &sensor_dev_attr_in4_min.dev_attr))
 747                  || (err = device_create_file(&client->dev,
 748                                 &sensor_dev_attr_in4_max.dev_attr))
 749                  || (err = device_create_file(&client->dev,
 750                                 &sensor_dev_attr_in4_alarm.dev_attr))
 751                  || (err = device_create_file(&client->dev,
 752                                 &sensor_dev_attr_in4_beep.dev_attr)))
 753                         goto exit_remove_files;
 754         }
 755
 756
 757         data->hwmon_dev = hwmon_device_register(&client->dev);
 758         if (IS_ERR(data->hwmon_dev)) {
 759                 err = PTR_ERR(data->hwmon_dev);
 760                 goto exit_remove_files;
 761         }
 762
 763         return 0;
 764
 765 exit_remove_files:
 766         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 767         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 768 exit_free:
 769         kfree(data);
 770 exit:
 771         return err;
 772 }
 773
 774
 775 /* Called when we have found a new GL520SM. */
 776 static void gl520_init_client(struct i2c_client *client)
 777 {
 778         struct gl520_data *data = i2c_get_clientdata(client);
 779         u8 oldconf, conf;
 780
 781         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 782
 783         data->alarm_mask = 0xff;
 784         data->vrm = vid_which_vrm();
 785
 786         if (extra_sensor_type == 1)
 787                 conf &= ~0x10;
 788         else if (extra_sensor_type == 2)
 789                 conf |= 0x10;
 790         data->two_temps = !(conf & 0x10);
 791
 792         /* If IRQ# is disabled, we can safely force comparator mode */
 793         if (!(conf & 0x20))
 794                 conf &= 0xf7;
 795
 796         /* Enable monitoring if needed */
 797         conf |= 0x40;
 798
 799         if (conf != oldconf)
 800                 gl520_write_value(client, GL520_REG_CONF, conf);
 801
 802         gl520_update_device(&(client->dev));
 803
 804         if (data->fan_min[0] == 0)
 805                 data->alarm_mask &= ~0x20;
 806         if (data->fan_min[1] == 0)
 807                 data->alarm_mask &= ~0x40;
 808
 809         data->beep_mask &= data->alarm_mask;
 810         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 811 }
 812
 813 static int gl520_remove(struct i2c_client *client)
 814 {
 815         struct gl520_data *data = i2c_get_clientdata(client);
 816
 817         hwmon_device_unregister(data->hwmon_dev);
 818         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 819         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 820
 821         kfree(data);
 822         return 0;
 823 }
 824
 825
 826 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 827    GL520 uses a high-byte first convention */
 828 static int gl520_read_value(struct i2c_client *client, u8 reg)
 829 {
 830         if ((reg >= 0x07) && (reg <= 0x0c))
 831                 return swab16(i2c_smbus_read_word_data(client, reg));
 832         else
 833                 return i2c_smbus_read_byte_data(client, reg);
 834 }
 835
 836 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 837 {
 838         if ((reg >= 0x07) && (reg <= 0x0c))
 839                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 840         else
 841                 return i2c_smbus_write_byte_data(client, reg, value);
 842 }
 843
 844
 845 static struct gl520_data *gl520_update_device(struct device *dev)
 846 {
 847         struct i2c_client *client = to_i2c_client(dev);
 848         struct gl520_data *data = i2c_get_clientdata(client);
 849         int val, i;
 850
 851         mutex_lock(&data->update_lock);
 852
 853         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 854
 855                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 856
 857                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 858                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 859                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 860
 861                 for (i = 0; i < 4; i++) {
 862                         data->in_input[i] = gl520_read_value(client,
 863                                                         GL520_REG_IN_INPUT[i]);
 864                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 865                         data->in_min[i] = val & 0xff;
 866                         data->in_max[i] = (val >> 8) & 0xff;
 867                 }
 868
 869                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 870                 data->fan_input[0] = (val >> 8) & 0xff;
 871                 data->fan_input[1] = val & 0xff;
 872
 873                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 874                 data->fan_min[0] = (val >> 8) & 0xff;
 875                 data->fan_min[1] = val & 0xff;
 876
 877                 data->temp_input[0] = gl520_read_value(client,
 878                                                 GL520_REG_TEMP_INPUT[0]);
 879                 data->temp_max[0] = gl520_read_value(client,
 880                                                 GL520_REG_TEMP_MAX[0]);
 881                 data->temp_max_hyst[0] = gl520_read_value(client,
 882                                                 GL520_REG_TEMP_MAX_HYST[0]);
 883
 884                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 885                 data->fan_div[0] = (val >> 6) & 0x03;
 886                 data->fan_div[1] = (val >> 4) & 0x03;
 887                 data->fan_off = (val >> 2) & 0x01;
 888
 889                 data->alarms &= data->alarm_mask;
 890
 891                 val = gl520_read_value(client, GL520_REG_CONF);
 892                 data->beep_enable = !((val >> 2) & 1);
 893
 894                 /* Temp1 and Vin4 are the same input */
 895                 if (data->two_temps) {
 896                         data->temp_input[1] = gl520_read_value(client,
 897                                                 GL520_REG_TEMP_INPUT[1]);
 898                         data->temp_max[1] = gl520_read_value(client,
 899                                                 GL520_REG_TEMP_MAX[1]);
 900                         data->temp_max_hyst[1] = gl520_read_value(client,
 901                                                 GL520_REG_TEMP_MAX_HYST[1]);
 902                 } else {
 903                         data->in_input[4] = gl520_read_value(client,
 904                                                 GL520_REG_IN_INPUT[4]);
 905                         data->in_min[4] = gl520_read_value(client,
 906                                                 GL520_REG_IN_MIN[4]);
 907                         data->in_max[4] = gl520_read_value(client,
 908                                                 GL520_REG_IN_MAX[4]);
 909                 }
 910
 911                 data->last_updated = jiffies;
 912                 data->valid = 1;
 913         }
 914
 915         mutex_unlock(&data->update_lock);
 916
 917         return data;
 918 }
 919
 920
 921 static int __init sensors_gl520sm_init(void)
 922 {
 923         return i2c_add_driver(&gl520_driver);
 924 }
 925
 926 static void __exit sensors_gl520sm_exit(void)
 927 {
 928         i2c_del_driver(&gl520_driver);
 929 }
 930
 931
 932 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 933         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 934         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 935 MODULE_DESCRIPTION("GL520SM driver");
 936 MODULE_LICENSE("GPL");
 937
 938 module_init(sensors_gl520sm_init);
 939 module_exit(sensors_gl520sm_exit);