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/i2c-sensor.h>
  30 #include <linux/i2c-vid.h>
  31
  32 /* Type of the extra sensor */
  33 static unsigned short extra_sensor_type;
  34 module_param(extra_sensor_type, ushort, 0);
  35 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  36
  37 /* Addresses to scan */
  38 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  39 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  40
  41 /* Insmod parameters */
  42 SENSORS_INSMOD_1(gl520sm);
  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 #define GL520_REG_IN0_INPUT             0x15
  58 #define GL520_REG_IN0_LIMIT             0x0c
  59 #define GL520_REG_IN0_MIN               GL520_REG_IN0_LIMIT
  60 #define GL520_REG_IN0_MAX               GL520_REG_IN0_LIMIT
  61
  62 #define GL520_REG_IN1_INPUT             0x14
  63 #define GL520_REG_IN1_LIMIT             0x09
  64 #define GL520_REG_IN1_MIN               GL520_REG_IN1_LIMIT
  65 #define GL520_REG_IN1_MAX               GL520_REG_IN1_LIMIT
  66
  67 #define GL520_REG_IN2_INPUT             0x13
  68 #define GL520_REG_IN2_LIMIT             0x0a
  69 #define GL520_REG_IN2_MIN               GL520_REG_IN2_LIMIT
  70 #define GL520_REG_IN2_MAX               GL520_REG_IN2_LIMIT
  71
  72 #define GL520_REG_IN3_INPUT             0x0d
  73 #define GL520_REG_IN3_LIMIT             0x0b
  74 #define GL520_REG_IN3_MIN               GL520_REG_IN3_LIMIT
  75 #define GL520_REG_IN3_MAX               GL520_REG_IN3_LIMIT
  76
  77 #define GL520_REG_IN4_INPUT             0x0e
  78 #define GL520_REG_IN4_MAX               0x17
  79 #define GL520_REG_IN4_MIN               0x18
  80
  81 #define GL520_REG_TEMP1_INPUT           0x04
  82 #define GL520_REG_TEMP1_MAX             0x05
  83 #define GL520_REG_TEMP1_MAX_HYST        0x06
  84
  85 #define GL520_REG_TEMP2_INPUT           0x0e
  86 #define GL520_REG_TEMP2_MAX             0x17
  87 #define GL520_REG_TEMP2_MAX_HYST        0x18
  88
  89 #define GL520_REG_FAN_INPUT             0x07
  90 #define GL520_REG_FAN_MIN               0x08
  91 #define GL520_REG_FAN_DIV               0x0f
  92 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  93
  94 #define GL520_REG_ALARMS                0x12
  95 #define GL520_REG_BEEP_MASK             0x10
  96 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  97
  98 /*
  99  * Function declarations
 100  */
 101
 102 static int gl520_attach_adapter(struct i2c_adapter *adapter);
 103 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
 104 static void gl520_init_client(struct i2c_client *client);
 105 static int gl520_detach_client(struct i2c_client *client);
 106 static int gl520_read_value(struct i2c_client *client, u8 reg);
 107 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
 108 static struct gl520_data *gl520_update_device(struct device *dev);
 109
 110 /* Driver data */
 111 static struct i2c_driver gl520_driver = {
 112         .owner          = THIS_MODULE,
 113         .name           = "gl520sm",
 114         .id             = I2C_DRIVERID_GL520,
 115         .flags          = I2C_DF_NOTIFY,
 116         .attach_adapter = gl520_attach_adapter,
 117         .detach_client  = gl520_detach_client,
 118 };
 119
 120 /* Client data */
 121 struct gl520_data {
 122         struct i2c_client client;
 123         struct semaphore update_lock;
 124         char valid;             /* zero until the following fields are valid */
 125         unsigned long last_updated;     /* in jiffies */
 126
 127         u8 vid;
 128         u8 vrm;
 129         u8 in_input[5];         /* [0] = VVD */
 130         u8 in_min[5];           /* [0] = VDD */
 131         u8 in_max[5];           /* [0] = VDD */
 132         u8 fan_input[2];
 133         u8 fan_min[2];
 134         u8 fan_div[2];
 135         u8 fan_off;
 136         u8 temp_input[2];
 137         u8 temp_max[2];
 138         u8 temp_max_hyst[2];
 139         u8 alarms;
 140         u8 beep_enable;
 141         u8 beep_mask;
 142         u8 alarm_mask;
 143         u8 two_temps;
 144 };
 145
 146 /*
 147  * Sysfs stuff
 148  */
 149
 150 #define sysfs_r(type, n, item, reg) \
 151 static ssize_t get_##type##item (struct gl520_data *, char *, int); \
 152 static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \
 153 static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \
 154 { \
 155         struct gl520_data *data = gl520_update_device(dev); \
 156         return get_##type##item(data, buf, (n)); \
 157 }
 158
 159 #define sysfs_w(type, n, item, reg) \
 160 static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
 161 static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \
 162 static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 163 { \
 164         struct i2c_client *client = to_i2c_client(dev); \
 165         struct gl520_data *data = i2c_get_clientdata(client); \
 166         return set_##type##item(client, data, buf, count, (n), reg); \
 167 }
 168
 169 #define sysfs_rw_n(type, n, item, reg) \
 170 sysfs_r(type, n, item, reg) \
 171 sysfs_w(type, n, item, reg) \
 172 static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
 173
 174 #define sysfs_ro_n(type, n, item, reg) \
 175 sysfs_r(type, n, item, reg) \
 176 static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
 177
 178 #define sysfs_rw(type, item, reg) \
 179 sysfs_r(type, 0, item, reg) \
 180 sysfs_w(type, 0, item, reg) \
 181 static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
 182
 183 #define sysfs_ro(type, item, reg) \
 184 sysfs_r(type, 0, item, reg) \
 185 static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
 186
 187
 188 #define sysfs_vid(n) \
 189 sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
 190
 191 #define device_create_file_vid(client, n) \
 192 device_create_file(&client->dev, &dev_attr_cpu##n##_vid)
 193
 194 #define sysfs_in(n) \
 195 sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \
 196 sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \
 197 sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX) \
 198
 199 #define device_create_file_in(client, n) \
 200 ({device_create_file(&client->dev, &dev_attr_in##n##_input); \
 201 device_create_file(&client->dev, &dev_attr_in##n##_min); \
 202 device_create_file(&client->dev, &dev_attr_in##n##_max);})
 203
 204 #define sysfs_fan(n) \
 205 sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
 206 sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
 207 sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
 208
 209 #define device_create_file_fan(client, n) \
 210 ({device_create_file(&client->dev, &dev_attr_fan##n##_input); \
 211 device_create_file(&client->dev, &dev_attr_fan##n##_min); \
 212 device_create_file(&client->dev, &dev_attr_fan##n##_div);})
 213
 214 #define sysfs_fan_off(n) \
 215 sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \
 216
 217 #define device_create_file_fan_off(client, n) \
 218 device_create_file(&client->dev, &dev_attr_fan##n##_off)
 219
 220 #define sysfs_temp(n) \
 221 sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
 222 sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
 223 sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
 224
 225 #define device_create_file_temp(client, n) \
 226 ({device_create_file(&client->dev, &dev_attr_temp##n##_input); \
 227 device_create_file(&client->dev, &dev_attr_temp##n##_max); \
 228 device_create_file(&client->dev, &dev_attr_temp##n##_max_hyst);})
 229
 230 #define sysfs_alarms() \
 231 sysfs_ro(alarms, , GL520_REG_ALARMS) \
 232 sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
 233 sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
 234
 235 #define device_create_file_alarms(client) \
 236 ({device_create_file(&client->dev, &dev_attr_alarms); \
 237 device_create_file(&client->dev, &dev_attr_beep_enable); \
 238 device_create_file(&client->dev, &dev_attr_beep_mask);})
 239
 240
 241 sysfs_vid(0)
 242
 243 sysfs_in(0)
 244 sysfs_in(1)
 245 sysfs_in(2)
 246 sysfs_in(3)
 247 sysfs_in(4)
 248
 249 sysfs_fan(1)
 250 sysfs_fan(2)
 251 sysfs_fan_off(1)
 252
 253 sysfs_temp(1)
 254 sysfs_temp(2)
 255
 256 sysfs_alarms()
 257
 258
 259 static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
 260 {
 261         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 262 }
 263
 264 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 265 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 266
 267 #define IN_FROM_REG(val) ((val)*19)
 268 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 269
 270 static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
 271 {
 272         u8 r = data->in_input[n];
 273
 274         if (n == 0)
 275                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 276         else
 277                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 278 }
 279
 280 static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
 281 {
 282         u8 r = data->in_min[n];
 283
 284         if (n == 0)
 285                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 286         else
 287                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 288 }
 289
 290 static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
 291 {
 292         u8 r = data->in_max[n];
 293
 294         if (n == 0)
 295                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 296         else
 297                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 298 }
 299
 300 static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 301 {
 302         long v = simple_strtol(buf, NULL, 10);
 303         u8 r;
 304
 305         down(&data->update_lock);
 306
 307         if (n == 0)
 308                 r = VDD_TO_REG(v);
 309         else
 310                 r = IN_TO_REG(v);
 311
 312         data->in_min[n] = r;
 313
 314         if (n < 4)
 315                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 316         else
 317                 gl520_write_value(client, reg, r);
 318
 319         up(&data->update_lock);
 320         return count;
 321 }
 322
 323 static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 324 {
 325         long v = simple_strtol(buf, NULL, 10);
 326         u8 r;
 327
 328         if (n == 0)
 329                 r = VDD_TO_REG(v);
 330         else
 331                 r = IN_TO_REG(v);
 332
 333         down(&data->update_lock);
 334
 335         data->in_max[n] = r;
 336
 337         if (n < 4)
 338                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 339         else
 340                 gl520_write_value(client, reg, r);
 341
 342         up(&data->update_lock);
 343         return count;
 344 }
 345
 346 #define DIV_FROM_REG(val) (1 << (val))
 347 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 348 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 349
 350 static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
 351 {
 352         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
 353 }
 354
 355 static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
 356 {
 357         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
 358 }
 359
 360 static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
 361 {
 362         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
 363 }
 364
 365 static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
 366 {
 367         return sprintf(buf, "%d\n", data->fan_off);
 368 }
 369
 370 static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 371 {
 372         unsigned long v = simple_strtoul(buf, NULL, 10);
 373         u8 r;
 374
 375         down(&data->update_lock);
 376         r = FAN_TO_REG(v, data->fan_div[n - 1]);
 377         data->fan_min[n - 1] = r;
 378
 379         if (n == 1)
 380                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 381         else
 382                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 383
 384         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 385         if (data->fan_min[n - 1] == 0)
 386                 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
 387         else
 388                 data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
 389         data->beep_mask &= data->alarm_mask;
 390         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 391
 392         up(&data->update_lock);
 393         return count;
 394 }
 395
 396 static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 397 {
 398         unsigned long v = simple_strtoul(buf, NULL, 10);
 399         u8 r;
 400
 401         switch (v) {
 402         case 1: r = 0; break;
 403         case 2: r = 1; break;
 404         case 4: r = 2; break;
 405         case 8: r = 3; break;
 406         default:
 407                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 408                 return -EINVAL;
 409         }
 410
 411         down(&data->update_lock);
 412         data->fan_div[n - 1] = r;
 413
 414         if (n == 1)
 415                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
 416         else
 417                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
 418
 419         up(&data->update_lock);
 420         return count;
 421 }
 422
 423 static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 424 {
 425         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 426
 427         down(&data->update_lock);
 428         data->fan_off = r;
 429         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
 430         up(&data->update_lock);
 431         return count;
 432 }
 433
 434 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 435 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 436
 437 static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
 438 {
 439         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
 440 }
 441
 442 static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
 443 {
 444         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
 445 }
 446
 447 static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
 448 {
 449         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
 450 }
 451
 452 static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 453 {
 454         long v = simple_strtol(buf, NULL, 10);
 455
 456         down(&data->update_lock);
 457         data->temp_max[n - 1] = TEMP_TO_REG(v);;
 458         gl520_write_value(client, reg, data->temp_max[n - 1]);
 459         up(&data->update_lock);
 460         return count;
 461 }
 462
 463 static ssize_t set_temp_max_hyst(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 464 {
 465         long v = simple_strtol(buf, NULL, 10);
 466
 467         down(&data->update_lock);
 468         data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
 469         gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
 470         up(&data->update_lock);
 471         return count;
 472 }
 473
 474 static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
 475 {
 476         return sprintf(buf, "%d\n", data->alarms);
 477 }
 478
 479 static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
 480 {
 481         return sprintf(buf, "%d\n", data->beep_enable);
 482 }
 483
 484 static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
 485 {
 486         return sprintf(buf, "%d\n", data->beep_mask);
 487 }
 488
 489 static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 490 {
 491         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 492
 493         down(&data->update_lock);
 494         data->beep_enable = !r;
 495         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
 496         up(&data->update_lock);
 497         return count;
 498 }
 499
 500 static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 501 {
 502         u8 r = simple_strtoul(buf, NULL, 10);
 503
 504         down(&data->update_lock);
 505         r &= data->alarm_mask;
 506         data->beep_mask = r;
 507         gl520_write_value(client, reg, r);
 508         up(&data->update_lock);
 509         return count;
 510 }
 511
 512
 513 /*
 514  * Real code
 515  */
 516
 517 static int gl520_attach_adapter(struct i2c_adapter *adapter)
 518 {
 519         if (!(adapter->class & I2C_CLASS_HWMON))
 520                 return 0;
 521         return i2c_detect(adapter, &addr_data, gl520_detect);
 522 }
 523
 524 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
 525 {
 526         struct i2c_client *new_client;
 527         struct gl520_data *data;
 528         int err = 0;
 529
 530         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 531                                      I2C_FUNC_SMBUS_WORD_DATA))
 532                 goto exit;
 533
 534         /* OK. For now, we presume we have a valid client. We now create the
 535            client structure, even though we cannot fill it completely yet.
 536            But it allows us to access gl520_{read,write}_value. */
 537
 538         if (!(data = kmalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
 539                 err = -ENOMEM;
 540                 goto exit;
 541         }
 542         memset(data, 0, sizeof(struct gl520_data));
 543
 544         new_client = &data->client;
 545         i2c_set_clientdata(new_client, data);
 546         new_client->addr = address;
 547         new_client->adapter = adapter;
 548         new_client->driver = &gl520_driver;
 549         new_client->flags = 0;
 550
 551         /* Determine the chip type. */
 552         if (kind < 0) {
 553                 if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) ||
 554                     ((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 555                     ((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) {
 556                         dev_dbg(&new_client->dev, "Unknown chip type, skipping\n");
 557                         goto exit_free;
 558                 }
 559         }
 560
 561         /* Fill in the remaining client fields */
 562         strlcpy(new_client->name, "gl520sm", I2C_NAME_SIZE);
 563         data->valid = 0;
 564         init_MUTEX(&data->update_lock);
 565
 566         /* Tell the I2C layer a new client has arrived */
 567         if ((err = i2c_attach_client(new_client)))
 568                 goto exit_free;
 569
 570         /* Initialize the GL520SM chip */
 571         gl520_init_client(new_client);
 572
 573         /* Register sysfs hooks */
 574         device_create_file_vid(new_client, 0);
 575
 576         device_create_file_in(new_client, 0);
 577         device_create_file_in(new_client, 1);
 578         device_create_file_in(new_client, 2);
 579         device_create_file_in(new_client, 3);
 580         if (!data->two_temps)
 581                 device_create_file_in(new_client, 4);
 582
 583         device_create_file_fan(new_client, 1);
 584         device_create_file_fan(new_client, 2);
 585         device_create_file_fan_off(new_client, 1);
 586
 587         device_create_file_temp(new_client, 1);
 588         if (data->two_temps)
 589                 device_create_file_temp(new_client, 2);
 590
 591         device_create_file_alarms(new_client);
 592
 593         return 0;
 594
 595 exit_free:
 596         kfree(data);
 597 exit:
 598         return err;
 599 }
 600
 601
 602 /* Called when we have found a new GL520SM. */
 603 static void gl520_init_client(struct i2c_client *client)
 604 {
 605         struct gl520_data *data = i2c_get_clientdata(client);
 606         u8 oldconf, conf;
 607
 608         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 609
 610         data->alarm_mask = 0xff;
 611         data->vrm = i2c_which_vrm();
 612
 613         if (extra_sensor_type == 1)
 614                 conf &= ~0x10;
 615         else if (extra_sensor_type == 2)
 616                 conf |= 0x10;
 617         data->two_temps = !(conf & 0x10);
 618
 619         /* If IRQ# is disabled, we can safely force comparator mode */
 620         if (!(conf & 0x20))
 621                 conf &= 0xf7;
 622
 623         /* Enable monitoring if needed */
 624         conf |= 0x40;
 625
 626         if (conf != oldconf)
 627                 gl520_write_value(client, GL520_REG_CONF, conf);
 628
 629         gl520_update_device(&(client->dev));
 630
 631         if (data->fan_min[0] == 0)
 632                 data->alarm_mask &= ~0x20;
 633         if (data->fan_min[1] == 0)
 634                 data->alarm_mask &= ~0x40;
 635
 636         data->beep_mask &= data->alarm_mask;
 637         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 638 }
 639
 640 static int gl520_detach_client(struct i2c_client *client)
 641 {
 642         int err;
 643
 644         if ((err = i2c_detach_client(client))) {
 645                 dev_err(&client->dev, "Client deregistration failed, "
 646                         "client not detached.\n");
 647                 return err;
 648         }
 649
 650         kfree(i2c_get_clientdata(client));
 651         return 0;
 652 }
 653
 654
 655 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 656    GL520 uses a high-byte first convention */
 657 static int gl520_read_value(struct i2c_client *client, u8 reg)
 658 {
 659         if ((reg >= 0x07) && (reg <= 0x0c))
 660                 return swab16(i2c_smbus_read_word_data(client, reg));
 661         else
 662                 return i2c_smbus_read_byte_data(client, reg);
 663 }
 664
 665 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 666 {
 667         if ((reg >= 0x07) && (reg <= 0x0c))
 668                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 669         else
 670                 return i2c_smbus_write_byte_data(client, reg, value);
 671 }
 672
 673
 674 static struct gl520_data *gl520_update_device(struct device *dev)
 675 {
 676         struct i2c_client *client = to_i2c_client(dev);
 677         struct gl520_data *data = i2c_get_clientdata(client);
 678         int val;
 679
 680         down(&data->update_lock);
 681
 682         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 683
 684                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 685
 686                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 687                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 688                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 689
 690                 val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
 691                 data->in_min[0] = val & 0xff;
 692                 data->in_max[0] = (val >> 8) & 0xff;
 693                 val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
 694                 data->in_min[1] = val & 0xff;
 695                 data->in_max[1] = (val >> 8) & 0xff;
 696                 val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
 697                 data->in_min[2] = val & 0xff;
 698                 data->in_max[2] = (val >> 8) & 0xff;
 699                 val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
 700                 data->in_min[3] = val & 0xff;
 701                 data->in_max[3] = (val >> 8) & 0xff;
 702
 703                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 704                 data->fan_input[0] = (val >> 8) & 0xff;
 705                 data->fan_input[1] = val & 0xff;
 706
 707                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 708                 data->fan_min[0] = (val >> 8) & 0xff;
 709                 data->fan_min[1] = val & 0xff;
 710
 711                 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
 712                 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
 713                 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
 714
 715                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 716                 data->fan_div[0] = (val >> 6) & 0x03;
 717                 data->fan_div[1] = (val >> 4) & 0x03;
 718                 data->fan_off = (val >> 2) & 0x01;
 719
 720                 data->alarms &= data->alarm_mask;
 721
 722                 val = gl520_read_value(client, GL520_REG_CONF);
 723                 data->beep_enable = !((val >> 2) & 1);
 724
 725                 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
 726                 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
 727                 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
 728                 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
 729
 730                 /* Temp1 and Vin4 are the same input */
 731                 if (data->two_temps) {
 732                         data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
 733                         data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
 734                         data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
 735                 } else {
 736                         data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
 737                         data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
 738                         data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
 739                 }
 740
 741                 data->last_updated = jiffies;
 742                 data->valid = 1;
 743         }
 744
 745         up(&data->update_lock);
 746
 747         return data;
 748 }
 749
 750
 751 static int __init sensors_gl520sm_init(void)
 752 {
 753         return i2c_add_driver(&gl520_driver);
 754 }
 755
 756 static void __exit sensors_gl520sm_exit(void)
 757 {
 758         i2c_del_driver(&gl520_driver);
 759 }
 760
 761
 762 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 763         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 764         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 765 MODULE_DESCRIPTION("GL520SM driver");
 766 MODULE_LICENSE("GPL");
 767
 768 module_init(sensors_gl520sm_init);
 769 module_exit(sensors_gl520sm_exit);