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-vid.h>
  31 #include <linux/err.h>
  32 #include <linux/mutex.h>
  33 #include <linux/sysfs.h>
  34
  35 /* Type of the extra sensor */
  36 static unsigned short extra_sensor_type;
  37 module_param(extra_sensor_type, ushort, 0);
  38 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  39
  40 /* Addresses to scan */
  41 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  42
  43 /* Insmod parameters */
  44 I2C_CLIENT_INSMOD_1(gl520sm);
  45
  46 /* Many GL520 constants specified below
  47 One of the inputs can be configured as either temp or voltage.
  48 That's why _TEMP2 and _IN4 access the same register
  49 */
  50
  51 /* The GL520 registers */
  52 #define GL520_REG_CHIP_ID               0x00
  53 #define GL520_REG_REVISION              0x01
  54 #define GL520_REG_CONF                  0x03
  55 #define GL520_REG_MASK                  0x11
  56
  57 #define GL520_REG_VID_INPUT             0x02
  58
  59 #define GL520_REG_IN0_INPUT             0x15
  60 #define GL520_REG_IN0_LIMIT             0x0c
  61 #define GL520_REG_IN0_MIN               GL520_REG_IN0_LIMIT
  62 #define GL520_REG_IN0_MAX               GL520_REG_IN0_LIMIT
  63
  64 #define GL520_REG_IN1_INPUT             0x14
  65 #define GL520_REG_IN1_LIMIT             0x09
  66 #define GL520_REG_IN1_MIN               GL520_REG_IN1_LIMIT
  67 #define GL520_REG_IN1_MAX               GL520_REG_IN1_LIMIT
  68
  69 #define GL520_REG_IN2_INPUT             0x13
  70 #define GL520_REG_IN2_LIMIT             0x0a
  71 #define GL520_REG_IN2_MIN               GL520_REG_IN2_LIMIT
  72 #define GL520_REG_IN2_MAX               GL520_REG_IN2_LIMIT
  73
  74 #define GL520_REG_IN3_INPUT             0x0d
  75 #define GL520_REG_IN3_LIMIT             0x0b
  76 #define GL520_REG_IN3_MIN               GL520_REG_IN3_LIMIT
  77 #define GL520_REG_IN3_MAX               GL520_REG_IN3_LIMIT
  78
  79 #define GL520_REG_IN4_INPUT             0x0e
  80 #define GL520_REG_IN4_MAX               0x17
  81 #define GL520_REG_IN4_MIN               0x18
  82
  83 #define GL520_REG_TEMP1_INPUT           0x04
  84 #define GL520_REG_TEMP1_MAX             0x05
  85 #define GL520_REG_TEMP1_MAX_HYST        0x06
  86
  87 #define GL520_REG_TEMP2_INPUT           0x0e
  88 #define GL520_REG_TEMP2_MAX             0x17
  89 #define GL520_REG_TEMP2_MAX_HYST        0x18
  90
  91 #define GL520_REG_FAN_INPUT             0x07
  92 #define GL520_REG_FAN_MIN               0x08
  93 #define GL520_REG_FAN_DIV               0x0f
  94 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  95
  96 #define GL520_REG_ALARMS                0x12
  97 #define GL520_REG_BEEP_MASK             0x10
  98 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  99
 100 /*
 101  * Function declarations
 102  */
 103
 104 static int gl520_attach_adapter(struct i2c_adapter *adapter);
 105 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
 106 static void gl520_init_client(struct i2c_client *client);
 107 static int gl520_detach_client(struct i2c_client *client);
 108 static int gl520_read_value(struct i2c_client *client, u8 reg);
 109 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
 110 static struct gl520_data *gl520_update_device(struct device *dev);
 111
 112 /* Driver data */
 113 static struct i2c_driver gl520_driver = {
 114         .driver = {
 115                 .name   = "gl520sm",
 116         },
 117         .id             = I2C_DRIVERID_GL520,
 118         .attach_adapter = gl520_attach_adapter,
 119         .detach_client  = gl520_detach_client,
 120 };
 121
 122 /* Client data */
 123 struct gl520_data {
 124         struct i2c_client client;
 125         struct device *hwmon_dev;
 126         struct mutex update_lock;
 127         char valid;             /* zero until the following fields are valid */
 128         unsigned long last_updated;     /* in jiffies */
 129
 130         u8 vid;
 131         u8 vrm;
 132         u8 in_input[5];         /* [0] = VVD */
 133         u8 in_min[5];           /* [0] = VDD */
 134         u8 in_max[5];           /* [0] = VDD */
 135         u8 fan_input[2];
 136         u8 fan_min[2];
 137         u8 fan_div[2];
 138         u8 fan_off;
 139         u8 temp_input[2];
 140         u8 temp_max[2];
 141         u8 temp_max_hyst[2];
 142         u8 alarms;
 143         u8 beep_enable;
 144         u8 beep_mask;
 145         u8 alarm_mask;
 146         u8 two_temps;
 147 };
 148
 149 /*
 150  * Sysfs stuff
 151  */
 152
 153 #define sysfs_r(type, n, item, reg) \
 154 static ssize_t get_##type##item (struct gl520_data *, char *, int); \
 155 static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \
 156 static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \
 157 { \
 158         struct gl520_data *data = gl520_update_device(dev); \
 159         return get_##type##item(data, buf, (n)); \
 160 }
 161
 162 #define sysfs_w(type, n, item, reg) \
 163 static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
 164 static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \
 165 static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 166 { \
 167         struct i2c_client *client = to_i2c_client(dev); \
 168         struct gl520_data *data = i2c_get_clientdata(client); \
 169         return set_##type##item(client, data, buf, count, (n), reg); \
 170 }
 171
 172 #define sysfs_rw_n(type, n, item, reg) \
 173 sysfs_r(type, n, item, reg) \
 174 sysfs_w(type, n, item, reg) \
 175 static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
 176
 177 #define sysfs_ro_n(type, n, item, reg) \
 178 sysfs_r(type, n, item, reg) \
 179 static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
 180
 181 #define sysfs_rw(type, item, reg) \
 182 sysfs_r(type, 0, item, reg) \
 183 sysfs_w(type, 0, item, reg) \
 184 static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
 185
 186 #define sysfs_ro(type, item, reg) \
 187 sysfs_r(type, 0, item, reg) \
 188 static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
 189
 190
 191 #define sysfs_vid(n) \
 192 sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
 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 sysfs_fan(n) \
 200 sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
 201 sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
 202 sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
 203
 204 #define sysfs_fan_off(n) \
 205 sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \
 206
 207 #define sysfs_temp(n) \
 208 sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
 209 sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
 210 sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
 211
 212 #define sysfs_alarms() \
 213 sysfs_ro(alarms, , GL520_REG_ALARMS) \
 214 sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
 215 sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
 216
 217
 218 sysfs_vid(0)
 219
 220 sysfs_in(0)
 221 sysfs_in(1)
 222 sysfs_in(2)
 223 sysfs_in(3)
 224 sysfs_in(4)
 225
 226 sysfs_fan(1)
 227 sysfs_fan(2)
 228 sysfs_fan_off(1)
 229
 230 sysfs_temp(1)
 231 sysfs_temp(2)
 232
 233 sysfs_alarms()
 234
 235
 236 static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
 237 {
 238         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 239 }
 240
 241 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 242 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 243
 244 #define IN_FROM_REG(val) ((val)*19)
 245 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 246
 247 static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
 248 {
 249         u8 r = data->in_input[n];
 250
 251         if (n == 0)
 252                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 253         else
 254                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 255 }
 256
 257 static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
 258 {
 259         u8 r = data->in_min[n];
 260
 261         if (n == 0)
 262                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 263         else
 264                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 265 }
 266
 267 static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
 268 {
 269         u8 r = data->in_max[n];
 270
 271         if (n == 0)
 272                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 273         else
 274                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 275 }
 276
 277 static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 278 {
 279         long v = simple_strtol(buf, NULL, 10);
 280         u8 r;
 281
 282         mutex_lock(&data->update_lock);
 283
 284         if (n == 0)
 285                 r = VDD_TO_REG(v);
 286         else
 287                 r = IN_TO_REG(v);
 288
 289         data->in_min[n] = r;
 290
 291         if (n < 4)
 292                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 293         else
 294                 gl520_write_value(client, reg, r);
 295
 296         mutex_unlock(&data->update_lock);
 297         return count;
 298 }
 299
 300 static ssize_t set_in_max(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         if (n == 0)
 306                 r = VDD_TO_REG(v);
 307         else
 308                 r = IN_TO_REG(v);
 309
 310         mutex_lock(&data->update_lock);
 311
 312         data->in_max[n] = r;
 313
 314         if (n < 4)
 315                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 316         else
 317                 gl520_write_value(client, reg, r);
 318
 319         mutex_unlock(&data->update_lock);
 320         return count;
 321 }
 322
 323 #define DIV_FROM_REG(val) (1 << (val))
 324 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 325 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 326
 327 static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
 328 {
 329         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
 330 }
 331
 332 static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
 333 {
 334         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
 335 }
 336
 337 static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
 338 {
 339         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
 340 }
 341
 342 static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
 343 {
 344         return sprintf(buf, "%d\n", data->fan_off);
 345 }
 346
 347 static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 348 {
 349         unsigned long v = simple_strtoul(buf, NULL, 10);
 350         u8 r;
 351
 352         mutex_lock(&data->update_lock);
 353         r = FAN_TO_REG(v, data->fan_div[n - 1]);
 354         data->fan_min[n - 1] = r;
 355
 356         if (n == 1)
 357                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 358         else
 359                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 360
 361         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 362         if (data->fan_min[n - 1] == 0)
 363                 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
 364         else
 365                 data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
 366         data->beep_mask &= data->alarm_mask;
 367         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 368
 369         mutex_unlock(&data->update_lock);
 370         return count;
 371 }
 372
 373 static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 374 {
 375         unsigned long v = simple_strtoul(buf, NULL, 10);
 376         u8 r;
 377
 378         switch (v) {
 379         case 1: r = 0; break;
 380         case 2: r = 1; break;
 381         case 4: r = 2; break;
 382         case 8: r = 3; break;
 383         default:
 384                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 385                 return -EINVAL;
 386         }
 387
 388         mutex_lock(&data->update_lock);
 389         data->fan_div[n - 1] = r;
 390
 391         if (n == 1)
 392                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
 393         else
 394                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
 395
 396         mutex_unlock(&data->update_lock);
 397         return count;
 398 }
 399
 400 static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 401 {
 402         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 403
 404         mutex_lock(&data->update_lock);
 405         data->fan_off = r;
 406         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
 407         mutex_unlock(&data->update_lock);
 408         return count;
 409 }
 410
 411 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 412 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 413
 414 static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
 415 {
 416         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
 417 }
 418
 419 static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
 420 {
 421         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
 422 }
 423
 424 static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
 425 {
 426         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
 427 }
 428
 429 static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 430 {
 431         long v = simple_strtol(buf, NULL, 10);
 432
 433         mutex_lock(&data->update_lock);
 434         data->temp_max[n - 1] = TEMP_TO_REG(v);
 435         gl520_write_value(client, reg, data->temp_max[n - 1]);
 436         mutex_unlock(&data->update_lock);
 437         return count;
 438 }
 439
 440 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)
 441 {
 442         long v = simple_strtol(buf, NULL, 10);
 443
 444         mutex_lock(&data->update_lock);
 445         data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
 446         gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
 447         mutex_unlock(&data->update_lock);
 448         return count;
 449 }
 450
 451 static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
 452 {
 453         return sprintf(buf, "%d\n", data->alarms);
 454 }
 455
 456 static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
 457 {
 458         return sprintf(buf, "%d\n", data->beep_enable);
 459 }
 460
 461 static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
 462 {
 463         return sprintf(buf, "%d\n", data->beep_mask);
 464 }
 465
 466 static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 467 {
 468         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 469
 470         mutex_lock(&data->update_lock);
 471         data->beep_enable = !r;
 472         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
 473         mutex_unlock(&data->update_lock);
 474         return count;
 475 }
 476
 477 static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 478 {
 479         u8 r = simple_strtoul(buf, NULL, 10);
 480
 481         mutex_lock(&data->update_lock);
 482         r &= data->alarm_mask;
 483         data->beep_mask = r;
 484         gl520_write_value(client, reg, r);
 485         mutex_unlock(&data->update_lock);
 486         return count;
 487 }
 488
 489 static struct attribute *gl520_attributes[] = {
 490         &dev_attr_cpu0_vid.attr,
 491
 492         &dev_attr_in0_input.attr,
 493         &dev_attr_in0_min.attr,
 494         &dev_attr_in0_max.attr,
 495         &dev_attr_in1_input.attr,
 496         &dev_attr_in1_min.attr,
 497         &dev_attr_in1_max.attr,
 498         &dev_attr_in2_input.attr,
 499         &dev_attr_in2_min.attr,
 500         &dev_attr_in2_max.attr,
 501         &dev_attr_in3_input.attr,
 502         &dev_attr_in3_min.attr,
 503         &dev_attr_in3_max.attr,
 504
 505         &dev_attr_fan1_input.attr,
 506         &dev_attr_fan1_min.attr,
 507         &dev_attr_fan1_div.attr,
 508         &dev_attr_fan1_off.attr,
 509         &dev_attr_fan2_input.attr,
 510         &dev_attr_fan2_min.attr,
 511         &dev_attr_fan2_div.attr,
 512
 513         &dev_attr_temp1_input.attr,
 514         &dev_attr_temp1_max.attr,
 515         &dev_attr_temp1_max_hyst.attr,
 516
 517         &dev_attr_alarms.attr,
 518         &dev_attr_beep_enable.attr,
 519         &dev_attr_beep_mask.attr,
 520         NULL
 521 };
 522
 523 static const struct attribute_group gl520_group = {
 524         .attrs = gl520_attributes,
 525 };
 526
 527 static struct attribute *gl520_attributes_opt[] = {
 528         &dev_attr_in4_input.attr,
 529         &dev_attr_in4_min.attr,
 530         &dev_attr_in4_max.attr,
 531
 532         &dev_attr_temp2_input.attr,
 533         &dev_attr_temp2_max.attr,
 534         &dev_attr_temp2_max_hyst.attr,
 535         NULL
 536 };
 537
 538 static const struct attribute_group gl520_group_opt = {
 539         .attrs = gl520_attributes_opt,
 540 };
 541
 542
 543 /*
 544  * Real code
 545  */
 546
 547 static int gl520_attach_adapter(struct i2c_adapter *adapter)
 548 {
 549         if (!(adapter->class & I2C_CLASS_HWMON))
 550                 return 0;
 551         return i2c_probe(adapter, &addr_data, gl520_detect);
 552 }
 553
 554 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
 555 {
 556         struct i2c_client *new_client;
 557         struct gl520_data *data;
 558         int err = 0;
 559
 560         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 561                                      I2C_FUNC_SMBUS_WORD_DATA))
 562                 goto exit;
 563
 564         /* OK. For now, we presume we have a valid client. We now create the
 565            client structure, even though we cannot fill it completely yet.
 566            But it allows us to access gl520_{read,write}_value. */
 567
 568         if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
 569                 err = -ENOMEM;
 570                 goto exit;
 571         }
 572
 573         new_client = &data->client;
 574         i2c_set_clientdata(new_client, data);
 575         new_client->addr = address;
 576         new_client->adapter = adapter;
 577         new_client->driver = &gl520_driver;
 578         new_client->flags = 0;
 579
 580         /* Determine the chip type. */
 581         if (kind < 0) {
 582                 if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) ||
 583                     ((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 584                     ((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) {
 585                         dev_dbg(&new_client->dev, "Unknown chip type, skipping\n");
 586                         goto exit_free;
 587                 }
 588         }
 589
 590         /* Fill in the remaining client fields */
 591         strlcpy(new_client->name, "gl520sm", I2C_NAME_SIZE);
 592         data->valid = 0;
 593         mutex_init(&data->update_lock);
 594
 595         /* Tell the I2C layer a new client has arrived */
 596         if ((err = i2c_attach_client(new_client)))
 597                 goto exit_free;
 598
 599         /* Initialize the GL520SM chip */
 600         gl520_init_client(new_client);
 601
 602         /* Register sysfs hooks */
 603         if ((err = sysfs_create_group(&new_client->dev.kobj, &gl520_group)))
 604                 goto exit_detach;
 605
 606         if (data->two_temps) {
 607                 if ((err = device_create_file(&new_client->dev,
 608                                               &dev_attr_temp2_input))
 609                  || (err = device_create_file(&new_client->dev,
 610                                               &dev_attr_temp2_max))
 611                  || (err = device_create_file(&new_client->dev,
 612                                               &dev_attr_temp2_max_hyst)))
 613                         goto exit_remove_files;
 614         } else {
 615                 if ((err = device_create_file(&new_client->dev,
 616                                               &dev_attr_in4_input))
 617                  || (err = device_create_file(&new_client->dev,
 618                                               &dev_attr_in4_min))
 619                  || (err = device_create_file(&new_client->dev,
 620                                               &dev_attr_in4_max)))
 621                         goto exit_remove_files;
 622         }
 623
 624
 625         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 626         if (IS_ERR(data->hwmon_dev)) {
 627                 err = PTR_ERR(data->hwmon_dev);
 628                 goto exit_remove_files;
 629         }
 630
 631         return 0;
 632
 633 exit_remove_files:
 634         sysfs_remove_group(&new_client->dev.kobj, &gl520_group);
 635         sysfs_remove_group(&new_client->dev.kobj, &gl520_group_opt);
 636 exit_detach:
 637         i2c_detach_client(new_client);
 638 exit_free:
 639         kfree(data);
 640 exit:
 641         return err;
 642 }
 643
 644
 645 /* Called when we have found a new GL520SM. */
 646 static void gl520_init_client(struct i2c_client *client)
 647 {
 648         struct gl520_data *data = i2c_get_clientdata(client);
 649         u8 oldconf, conf;
 650
 651         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 652
 653         data->alarm_mask = 0xff;
 654         data->vrm = vid_which_vrm();
 655
 656         if (extra_sensor_type == 1)
 657                 conf &= ~0x10;
 658         else if (extra_sensor_type == 2)
 659                 conf |= 0x10;
 660         data->two_temps = !(conf & 0x10);
 661
 662         /* If IRQ# is disabled, we can safely force comparator mode */
 663         if (!(conf & 0x20))
 664                 conf &= 0xf7;
 665
 666         /* Enable monitoring if needed */
 667         conf |= 0x40;
 668
 669         if (conf != oldconf)
 670                 gl520_write_value(client, GL520_REG_CONF, conf);
 671
 672         gl520_update_device(&(client->dev));
 673
 674         if (data->fan_min[0] == 0)
 675                 data->alarm_mask &= ~0x20;
 676         if (data->fan_min[1] == 0)
 677                 data->alarm_mask &= ~0x40;
 678
 679         data->beep_mask &= data->alarm_mask;
 680         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 681 }
 682
 683 static int gl520_detach_client(struct i2c_client *client)
 684 {
 685         struct gl520_data *data = i2c_get_clientdata(client);
 686         int err;
 687
 688         hwmon_device_unregister(data->hwmon_dev);
 689         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 690         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 691
 692         if ((err = i2c_detach_client(client)))
 693                 return err;
 694
 695         kfree(data);
 696         return 0;
 697 }
 698
 699
 700 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 701    GL520 uses a high-byte first convention */
 702 static int gl520_read_value(struct i2c_client *client, u8 reg)
 703 {
 704         if ((reg >= 0x07) && (reg <= 0x0c))
 705                 return swab16(i2c_smbus_read_word_data(client, reg));
 706         else
 707                 return i2c_smbus_read_byte_data(client, reg);
 708 }
 709
 710 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 711 {
 712         if ((reg >= 0x07) && (reg <= 0x0c))
 713                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 714         else
 715                 return i2c_smbus_write_byte_data(client, reg, value);
 716 }
 717
 718
 719 static struct gl520_data *gl520_update_device(struct device *dev)
 720 {
 721         struct i2c_client *client = to_i2c_client(dev);
 722         struct gl520_data *data = i2c_get_clientdata(client);
 723         int val;
 724
 725         mutex_lock(&data->update_lock);
 726
 727         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 728
 729                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 730
 731                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 732                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 733                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 734
 735                 val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
 736                 data->in_min[0] = val & 0xff;
 737                 data->in_max[0] = (val >> 8) & 0xff;
 738                 val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
 739                 data->in_min[1] = val & 0xff;
 740                 data->in_max[1] = (val >> 8) & 0xff;
 741                 val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
 742                 data->in_min[2] = val & 0xff;
 743                 data->in_max[2] = (val >> 8) & 0xff;
 744                 val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
 745                 data->in_min[3] = val & 0xff;
 746                 data->in_max[3] = (val >> 8) & 0xff;
 747
 748                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 749                 data->fan_input[0] = (val >> 8) & 0xff;
 750                 data->fan_input[1] = val & 0xff;
 751
 752                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 753                 data->fan_min[0] = (val >> 8) & 0xff;
 754                 data->fan_min[1] = val & 0xff;
 755
 756                 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
 757                 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
 758                 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
 759
 760                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 761                 data->fan_div[0] = (val >> 6) & 0x03;
 762                 data->fan_div[1] = (val >> 4) & 0x03;
 763                 data->fan_off = (val >> 2) & 0x01;
 764
 765                 data->alarms &= data->alarm_mask;
 766
 767                 val = gl520_read_value(client, GL520_REG_CONF);
 768                 data->beep_enable = !((val >> 2) & 1);
 769
 770                 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
 771                 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
 772                 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
 773                 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
 774
 775                 /* Temp1 and Vin4 are the same input */
 776                 if (data->two_temps) {
 777                         data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
 778                         data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
 779                         data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
 780                 } else {
 781                         data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
 782                         data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
 783                         data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
 784                 }
 785
 786                 data->last_updated = jiffies;
 787                 data->valid = 1;
 788         }
 789
 790         mutex_unlock(&data->update_lock);
 791
 792         return data;
 793 }
 794
 795
 796 static int __init sensors_gl520sm_init(void)
 797 {
 798         return i2c_add_driver(&gl520_driver);
 799 }
 800
 801 static void __exit sensors_gl520sm_exit(void)
 802 {
 803         i2c_del_driver(&gl520_driver);
 804 }
 805
 806
 807 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 808         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 809         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 810 MODULE_DESCRIPTION("GL520SM driver");
 811 MODULE_LICENSE("GPL");
 812
 813 module_init(sensors_gl520sm_init);
 814 module_exit(sensors_gl520sm_exit);