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         .attach_adapter = gl520_attach_adapter,
 118         .detach_client  = gl520_detach_client,
 119 };
 120
 121 /* Client data */
 122 struct gl520_data {
 123         struct i2c_client client;
 124         struct device *hwmon_dev;
 125         struct mutex update_lock;
 126         char valid;             /* zero until the following fields are valid */
 127         unsigned long last_updated;     /* in jiffies */
 128
 129         u8 vid;
 130         u8 vrm;
 131         u8 in_input[5];         /* [0] = VVD */
 132         u8 in_min[5];           /* [0] = VDD */
 133         u8 in_max[5];           /* [0] = VDD */
 134         u8 fan_input[2];
 135         u8 fan_min[2];
 136         u8 fan_div[2];
 137         u8 fan_off;
 138         u8 temp_input[2];
 139         u8 temp_max[2];
 140         u8 temp_max_hyst[2];
 141         u8 alarms;
 142         u8 beep_enable;
 143         u8 beep_mask;
 144         u8 alarm_mask;
 145         u8 two_temps;
 146 };
 147
 148 /*
 149  * Sysfs stuff
 150  */
 151
 152 #define sysfs_r(type, n, item, reg) \
 153 static ssize_t get_##type##item (struct gl520_data *, char *, int); \
 154 static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \
 155 static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \
 156 { \
 157         struct gl520_data *data = gl520_update_device(dev); \
 158         return get_##type##item(data, buf, (n)); \
 159 }
 160
 161 #define sysfs_w(type, n, item, reg) \
 162 static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
 163 static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \
 164 static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 165 { \
 166         struct i2c_client *client = to_i2c_client(dev); \
 167         struct gl520_data *data = i2c_get_clientdata(client); \
 168         return set_##type##item(client, data, buf, count, (n), reg); \
 169 }
 170
 171 #define sysfs_rw_n(type, n, item, reg) \
 172 sysfs_r(type, n, item, reg) \
 173 sysfs_w(type, n, item, reg) \
 174 static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
 175
 176 #define sysfs_ro_n(type, n, item, reg) \
 177 sysfs_r(type, n, item, reg) \
 178 static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
 179
 180 #define sysfs_rw(type, item, reg) \
 181 sysfs_r(type, 0, item, reg) \
 182 sysfs_w(type, 0, item, reg) \
 183 static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
 184
 185 #define sysfs_ro(type, item, reg) \
 186 sysfs_r(type, 0, item, reg) \
 187 static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
 188
 189
 190 #define sysfs_vid(n) \
 191 sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
 192
 193 #define sysfs_in(n) \
 194 sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \
 195 sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \
 196 sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX)
 197
 198 #define sysfs_fan(n) \
 199 sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
 200 sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
 201 sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
 202
 203 #define sysfs_fan_off(n) \
 204 sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF)
 205
 206 #define sysfs_temp(n) \
 207 sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
 208 sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
 209 sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
 210
 211 #define sysfs_alarms() \
 212 sysfs_ro(alarms, , GL520_REG_ALARMS) \
 213 sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
 214 sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
 215
 216
 217 sysfs_vid(0)
 218
 219 sysfs_in(0)
 220 sysfs_in(1)
 221 sysfs_in(2)
 222 sysfs_in(3)
 223 sysfs_in(4)
 224
 225 sysfs_fan(1)
 226 sysfs_fan(2)
 227 sysfs_fan_off(1)
 228
 229 sysfs_temp(1)
 230 sysfs_temp(2)
 231
 232 sysfs_alarms()
 233
 234
 235 static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
 236 {
 237         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 238 }
 239
 240 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 241 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 242
 243 #define IN_FROM_REG(val) ((val)*19)
 244 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 245
 246 static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
 247 {
 248         u8 r = data->in_input[n];
 249
 250         if (n == 0)
 251                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 252         else
 253                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 254 }
 255
 256 static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
 257 {
 258         u8 r = data->in_min[n];
 259
 260         if (n == 0)
 261                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 262         else
 263                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 264 }
 265
 266 static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
 267 {
 268         u8 r = data->in_max[n];
 269
 270         if (n == 0)
 271                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 272         else
 273                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 274 }
 275
 276 static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 277 {
 278         long v = simple_strtol(buf, NULL, 10);
 279         u8 r;
 280
 281         mutex_lock(&data->update_lock);
 282
 283         if (n == 0)
 284                 r = VDD_TO_REG(v);
 285         else
 286                 r = IN_TO_REG(v);
 287
 288         data->in_min[n] = r;
 289
 290         if (n < 4)
 291                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 292         else
 293                 gl520_write_value(client, reg, r);
 294
 295         mutex_unlock(&data->update_lock);
 296         return count;
 297 }
 298
 299 static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 300 {
 301         long v = simple_strtol(buf, NULL, 10);
 302         u8 r;
 303
 304         if (n == 0)
 305                 r = VDD_TO_REG(v);
 306         else
 307                 r = IN_TO_REG(v);
 308
 309         mutex_lock(&data->update_lock);
 310
 311         data->in_max[n] = r;
 312
 313         if (n < 4)
 314                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 315         else
 316                 gl520_write_value(client, reg, r);
 317
 318         mutex_unlock(&data->update_lock);
 319         return count;
 320 }
 321
 322 #define DIV_FROM_REG(val) (1 << (val))
 323 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 324 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 325
 326 static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
 327 {
 328         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
 329 }
 330
 331 static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
 332 {
 333         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
 334 }
 335
 336 static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
 337 {
 338         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
 339 }
 340
 341 static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
 342 {
 343         return sprintf(buf, "%d\n", data->fan_off);
 344 }
 345
 346 static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 347 {
 348         unsigned long v = simple_strtoul(buf, NULL, 10);
 349         u8 r;
 350
 351         mutex_lock(&data->update_lock);
 352         r = FAN_TO_REG(v, data->fan_div[n - 1]);
 353         data->fan_min[n - 1] = r;
 354
 355         if (n == 1)
 356                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 357         else
 358                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 359
 360         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 361         if (data->fan_min[n - 1] == 0)
 362                 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
 363         else
 364                 data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
 365         data->beep_mask &= data->alarm_mask;
 366         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 367
 368         mutex_unlock(&data->update_lock);
 369         return count;
 370 }
 371
 372 static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 373 {
 374         unsigned long v = simple_strtoul(buf, NULL, 10);
 375         u8 r;
 376
 377         switch (v) {
 378         case 1: r = 0; break;
 379         case 2: r = 1; break;
 380         case 4: r = 2; break;
 381         case 8: r = 3; break;
 382         default:
 383                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 384                 return -EINVAL;
 385         }
 386
 387         mutex_lock(&data->update_lock);
 388         data->fan_div[n - 1] = r;
 389
 390         if (n == 1)
 391                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
 392         else
 393                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
 394
 395         mutex_unlock(&data->update_lock);
 396         return count;
 397 }
 398
 399 static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 400 {
 401         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 402
 403         mutex_lock(&data->update_lock);
 404         data->fan_off = r;
 405         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
 406         mutex_unlock(&data->update_lock);
 407         return count;
 408 }
 409
 410 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 411 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 412
 413 static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
 414 {
 415         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
 416 }
 417
 418 static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
 419 {
 420         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
 421 }
 422
 423 static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
 424 {
 425         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
 426 }
 427
 428 static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 429 {
 430         long v = simple_strtol(buf, NULL, 10);
 431
 432         mutex_lock(&data->update_lock);
 433         data->temp_max[n - 1] = TEMP_TO_REG(v);
 434         gl520_write_value(client, reg, data->temp_max[n - 1]);
 435         mutex_unlock(&data->update_lock);
 436         return count;
 437 }
 438
 439 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)
 440 {
 441         long v = simple_strtol(buf, NULL, 10);
 442
 443         mutex_lock(&data->update_lock);
 444         data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
 445         gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
 446         mutex_unlock(&data->update_lock);
 447         return count;
 448 }
 449
 450 static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
 451 {
 452         return sprintf(buf, "%d\n", data->alarms);
 453 }
 454
 455 static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
 456 {
 457         return sprintf(buf, "%d\n", data->beep_enable);
 458 }
 459
 460 static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
 461 {
 462         return sprintf(buf, "%d\n", data->beep_mask);
 463 }
 464
 465 static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 466 {
 467         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 468
 469         mutex_lock(&data->update_lock);
 470         data->beep_enable = !r;
 471         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
 472         mutex_unlock(&data->update_lock);
 473         return count;
 474 }
 475
 476 static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 477 {
 478         u8 r = simple_strtoul(buf, NULL, 10);
 479
 480         mutex_lock(&data->update_lock);
 481         r &= data->alarm_mask;
 482         data->beep_mask = r;
 483         gl520_write_value(client, reg, r);
 484         mutex_unlock(&data->update_lock);
 485         return count;
 486 }
 487
 488 static struct attribute *gl520_attributes[] = {
 489         &dev_attr_cpu0_vid.attr,
 490
 491         &dev_attr_in0_input.attr,
 492         &dev_attr_in0_min.attr,
 493         &dev_attr_in0_max.attr,
 494         &dev_attr_in1_input.attr,
 495         &dev_attr_in1_min.attr,
 496         &dev_attr_in1_max.attr,
 497         &dev_attr_in2_input.attr,
 498         &dev_attr_in2_min.attr,
 499         &dev_attr_in2_max.attr,
 500         &dev_attr_in3_input.attr,
 501         &dev_attr_in3_min.attr,
 502         &dev_attr_in3_max.attr,
 503
 504         &dev_attr_fan1_input.attr,
 505         &dev_attr_fan1_min.attr,
 506         &dev_attr_fan1_div.attr,
 507         &dev_attr_fan1_off.attr,
 508         &dev_attr_fan2_input.attr,
 509         &dev_attr_fan2_min.attr,
 510         &dev_attr_fan2_div.attr,
 511
 512         &dev_attr_temp1_input.attr,
 513         &dev_attr_temp1_max.attr,
 514         &dev_attr_temp1_max_hyst.attr,
 515
 516         &dev_attr_alarms.attr,
 517         &dev_attr_beep_enable.attr,
 518         &dev_attr_beep_mask.attr,
 519         NULL
 520 };
 521
 522 static const struct attribute_group gl520_group = {
 523         .attrs = gl520_attributes,
 524 };
 525
 526 static struct attribute *gl520_attributes_opt[] = {
 527         &dev_attr_in4_input.attr,
 528         &dev_attr_in4_min.attr,
 529         &dev_attr_in4_max.attr,
 530
 531         &dev_attr_temp2_input.attr,
 532         &dev_attr_temp2_max.attr,
 533         &dev_attr_temp2_max_hyst.attr,
 534         NULL
 535 };
 536
 537 static const struct attribute_group gl520_group_opt = {
 538         .attrs = gl520_attributes_opt,
 539 };
 540
 541
 542 /*
 543  * Real code
 544  */
 545
 546 static int gl520_attach_adapter(struct i2c_adapter *adapter)
 547 {
 548         if (!(adapter->class & I2C_CLASS_HWMON))
 549                 return 0;
 550         return i2c_probe(adapter, &addr_data, gl520_detect);
 551 }
 552
 553 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
 554 {
 555         struct i2c_client *client;
 556         struct gl520_data *data;
 557         int err = 0;
 558
 559         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 560                                      I2C_FUNC_SMBUS_WORD_DATA))
 561                 goto exit;
 562
 563         /* OK. For now, we presume we have a valid client. We now create the
 564            client structure, even though we cannot fill it completely yet.
 565            But it allows us to access gl520_{read,write}_value. */
 566
 567         if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
 568                 err = -ENOMEM;
 569                 goto exit;
 570         }
 571
 572         client = &data->client;
 573         i2c_set_clientdata(client, data);
 574         client->addr = address;
 575         client->adapter = adapter;
 576         client->driver = &gl520_driver;
 577
 578         /* Determine the chip type. */
 579         if (kind < 0) {
 580                 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 581                     ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 582                     ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 583                         dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 584                         goto exit_free;
 585                 }
 586         }
 587
 588         /* Fill in the remaining client fields */
 589         strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
 590         mutex_init(&data->update_lock);
 591
 592         /* Tell the I2C layer a new client has arrived */
 593         if ((err = i2c_attach_client(client)))
 594                 goto exit_free;
 595
 596         /* Initialize the GL520SM chip */
 597         gl520_init_client(client);
 598
 599         /* Register sysfs hooks */
 600         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
 601                 goto exit_detach;
 602
 603         if (data->two_temps) {
 604                 if ((err = device_create_file(&client->dev,
 605                                               &dev_attr_temp2_input))
 606                  || (err = device_create_file(&client->dev,
 607                                               &dev_attr_temp2_max))
 608                  || (err = device_create_file(&client->dev,
 609                                               &dev_attr_temp2_max_hyst)))
 610                         goto exit_remove_files;
 611         } else {
 612                 if ((err = device_create_file(&client->dev,
 613                                               &dev_attr_in4_input))
 614                  || (err = device_create_file(&client->dev,
 615                                               &dev_attr_in4_min))
 616                  || (err = device_create_file(&client->dev,
 617                                               &dev_attr_in4_max)))
 618                         goto exit_remove_files;
 619         }
 620
 621
 622         data->hwmon_dev = hwmon_device_register(&client->dev);
 623         if (IS_ERR(data->hwmon_dev)) {
 624                 err = PTR_ERR(data->hwmon_dev);
 625                 goto exit_remove_files;
 626         }
 627
 628         return 0;
 629
 630 exit_remove_files:
 631         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 632         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 633 exit_detach:
 634         i2c_detach_client(client);
 635 exit_free:
 636         kfree(data);
 637 exit:
 638         return err;
 639 }
 640
 641
 642 /* Called when we have found a new GL520SM. */
 643 static void gl520_init_client(struct i2c_client *client)
 644 {
 645         struct gl520_data *data = i2c_get_clientdata(client);
 646         u8 oldconf, conf;
 647
 648         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 649
 650         data->alarm_mask = 0xff;
 651         data->vrm = vid_which_vrm();
 652
 653         if (extra_sensor_type == 1)
 654                 conf &= ~0x10;
 655         else if (extra_sensor_type == 2)
 656                 conf |= 0x10;
 657         data->two_temps = !(conf & 0x10);
 658
 659         /* If IRQ# is disabled, we can safely force comparator mode */
 660         if (!(conf & 0x20))
 661                 conf &= 0xf7;
 662
 663         /* Enable monitoring if needed */
 664         conf |= 0x40;
 665
 666         if (conf != oldconf)
 667                 gl520_write_value(client, GL520_REG_CONF, conf);
 668
 669         gl520_update_device(&(client->dev));
 670
 671         if (data->fan_min[0] == 0)
 672                 data->alarm_mask &= ~0x20;
 673         if (data->fan_min[1] == 0)
 674                 data->alarm_mask &= ~0x40;
 675
 676         data->beep_mask &= data->alarm_mask;
 677         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 678 }
 679
 680 static int gl520_detach_client(struct i2c_client *client)
 681 {
 682         struct gl520_data *data = i2c_get_clientdata(client);
 683         int err;
 684
 685         hwmon_device_unregister(data->hwmon_dev);
 686         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 687         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 688
 689         if ((err = i2c_detach_client(client)))
 690                 return err;
 691
 692         kfree(data);
 693         return 0;
 694 }
 695
 696
 697 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 698    GL520 uses a high-byte first convention */
 699 static int gl520_read_value(struct i2c_client *client, u8 reg)
 700 {
 701         if ((reg >= 0x07) && (reg <= 0x0c))
 702                 return swab16(i2c_smbus_read_word_data(client, reg));
 703         else
 704                 return i2c_smbus_read_byte_data(client, reg);
 705 }
 706
 707 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 708 {
 709         if ((reg >= 0x07) && (reg <= 0x0c))
 710                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 711         else
 712                 return i2c_smbus_write_byte_data(client, reg, value);
 713 }
 714
 715
 716 static struct gl520_data *gl520_update_device(struct device *dev)
 717 {
 718         struct i2c_client *client = to_i2c_client(dev);
 719         struct gl520_data *data = i2c_get_clientdata(client);
 720         int val;
 721
 722         mutex_lock(&data->update_lock);
 723
 724         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 725
 726                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 727
 728                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 729                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 730                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 731
 732                 val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
 733                 data->in_min[0] = val & 0xff;
 734                 data->in_max[0] = (val >> 8) & 0xff;
 735                 val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
 736                 data->in_min[1] = val & 0xff;
 737                 data->in_max[1] = (val >> 8) & 0xff;
 738                 val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
 739                 data->in_min[2] = val & 0xff;
 740                 data->in_max[2] = (val >> 8) & 0xff;
 741                 val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
 742                 data->in_min[3] = val & 0xff;
 743                 data->in_max[3] = (val >> 8) & 0xff;
 744
 745                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 746                 data->fan_input[0] = (val >> 8) & 0xff;
 747                 data->fan_input[1] = val & 0xff;
 748
 749                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 750                 data->fan_min[0] = (val >> 8) & 0xff;
 751                 data->fan_min[1] = val & 0xff;
 752
 753                 data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
 754                 data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
 755                 data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
 756
 757                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 758                 data->fan_div[0] = (val >> 6) & 0x03;
 759                 data->fan_div[1] = (val >> 4) & 0x03;
 760                 data->fan_off = (val >> 2) & 0x01;
 761
 762                 data->alarms &= data->alarm_mask;
 763
 764                 val = gl520_read_value(client, GL520_REG_CONF);
 765                 data->beep_enable = !((val >> 2) & 1);
 766
 767                 data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
 768                 data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
 769                 data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
 770                 data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
 771
 772                 /* Temp1 and Vin4 are the same input */
 773                 if (data->two_temps) {
 774                         data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
 775                         data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
 776                         data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
 777                 } else {
 778                         data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
 779                         data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
 780                         data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
 781                 }
 782
 783                 data->last_updated = jiffies;
 784                 data->valid = 1;
 785         }
 786
 787         mutex_unlock(&data->update_lock);
 788
 789         return data;
 790 }
 791
 792
 793 static int __init sensors_gl520sm_init(void)
 794 {
 795         return i2c_add_driver(&gl520_driver);
 796 }
 797
 798 static void __exit sensors_gl520sm_exit(void)
 799 {
 800         i2c_del_driver(&gl520_driver);
 801 }
 802
 803
 804 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 805         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 806         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 807 MODULE_DESCRIPTION("GL520SM driver");
 808 MODULE_LICENSE("GPL");
 809
 810 module_init(sensors_gl520sm_init);
 811 module_exit(sensors_gl520sm_exit);