drivers/i2c/chips/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/i2c.h>
  28 #include <linux/i2c-sensor.h>
  29 #include <linux/i2c-vid.h>
  30
  31 /* Type of the extra sensor */
  32 static unsigned short extra_sensor_type;
  33 module_param(extra_sensor_type, ushort, 0);
  34 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  35
  36 /* Addresses to scan */
  37 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  38 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  39
  40 /* Insmod parameters */
  41 SENSORS_INSMOD_1(gl520sm);
  42
  43 /* Many GL520 constants specified below
  44 One of the inputs can be configured as either temp or voltage.
  45 That's why _TEMP2 and _IN4 access the same register
  46 */
  47
  48 /* The GL520 registers */
  49 #define GL520_REG_CHIP_ID               0x00
  50 #define GL520_REG_REVISION              0x01
  51 #define GL520_REG_CONF                  0x03
  52 #define GL520_REG_MASK                  0x11
  53
  54 #define GL520_REG_VID_INPUT             0x02
  55
  56 #define GL520_REG_IN0_INPUT             0x15
  57 #define GL520_REG_IN0_LIMIT             0x0c
  58 #define GL520_REG_IN0_MIN               GL520_REG_IN0_LIMIT
  59 #define GL520_REG_IN0_MAX               GL520_REG_IN0_LIMIT
  60
  61 #define GL520_REG_IN1_INPUT             0x14
  62 #define GL520_REG_IN1_LIMIT             0x09
  63 #define GL520_REG_IN1_MIN               GL520_REG_IN1_LIMIT
  64 #define GL520_REG_IN1_MAX               GL520_REG_IN1_LIMIT
  65
  66 #define GL520_REG_IN2_INPUT             0x13
  67 #define GL520_REG_IN2_LIMIT             0x0a
  68 #define GL520_REG_IN2_MIN               GL520_REG_IN2_LIMIT
  69 #define GL520_REG_IN2_MAX               GL520_REG_IN2_LIMIT
  70
  71 #define GL520_REG_IN3_INPUT             0x0d
  72 #define GL520_REG_IN3_LIMIT             0x0b
  73 #define GL520_REG_IN3_MIN               GL520_REG_IN3_LIMIT
  74 #define GL520_REG_IN3_MAX               GL520_REG_IN3_LIMIT
  75
  76 #define GL520_REG_IN4_INPUT             0x0e
  77 #define GL520_REG_IN4_MAX               0x17
  78 #define GL520_REG_IN4_MIN               0x18
  79
  80 #define GL520_REG_TEMP1_INPUT           0x04
  81 #define GL520_REG_TEMP1_MAX             0x05
  82 #define GL520_REG_TEMP1_MAX_HYST        0x06
  83
  84 #define GL520_REG_TEMP2_INPUT           0x0e
  85 #define GL520_REG_TEMP2_MAX             0x17
  86 #define GL520_REG_TEMP2_MAX_HYST        0x18
  87
  88 #define GL520_REG_FAN_INPUT             0x07
  89 #define GL520_REG_FAN_MIN               0x08
  90 #define GL520_REG_FAN_DIV               0x0f
  91 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  92
  93 #define GL520_REG_ALARMS                0x12
  94 #define GL520_REG_BEEP_MASK             0x10
  95 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  96
  97 /*
  98  * Function declarations
  99  */
 100
 101 static int gl520_attach_adapter(struct i2c_adapter *adapter);
 102 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
 103 static void gl520_init_client(struct i2c_client *client);
 104 static int gl520_detach_client(struct i2c_client *client);
 105 static int gl520_read_value(struct i2c_client *client, u8 reg);
 106 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
 107 static struct gl520_data *gl520_update_device(struct device *dev);
 108
 109 /* Driver data */
 110 static struct i2c_driver gl520_driver = {
 111         .owner          = THIS_MODULE,
 112         .name           = "gl520sm",
 113         .id             = I2C_DRIVERID_GL520,
 114         .flags          = I2C_DF_NOTIFY,
 115         .attach_adapter = gl520_attach_adapter,
 116         .detach_client  = gl520_detach_client,
 117 };
 118
 119 /* Client data */
 120 struct gl520_data {
 121         struct i2c_client client;
 122         struct semaphore update_lock;
 123         char valid;             /* zero until the following fields are valid */
 124         unsigned long last_updated;     /* in jiffies */
 125
 126         u8 vid;
 127         u8 vrm;
 128         u8 in_input[5];         /* [0] = VVD */
 129         u8 in_min[5];           /* [0] = VDD */
 130         u8 in_max[5];           /* [0] = VDD */
 131         u8 fan_input[2];
 132         u8 fan_min[2];
 133         u8 fan_div[2];
 134         u8 fan_off;
 135         u8 temp_input[2];
 136         u8 temp_max[2];
 137         u8 temp_max_hyst[2];
 138         u8 alarms;
 139         u8 beep_enable;
 140         u8 beep_mask;
 141         u8 alarm_mask;
 142         u8 two_temps;
 143 };
 144
 145 /*
 146  * Sysfs stuff
 147  */
 148
 149 #define sysfs_r(type, n, item, reg) \
 150 static ssize_t get_##type##item (struct gl520_data *, char *, int); \
 151 static ssize_t get_##type##n##item (struct device *, char *); \
 152 static ssize_t get_##type##n##item (struct device *dev, char *buf) \
 153 { \
 154         struct gl520_data *data = gl520_update_device(dev); \
 155         return get_##type##item(data, buf, (n)); \
 156 }
 157
 158 #define sysfs_w(type, n, item, reg) \
 159 static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
 160 static ssize_t set_##type##n##item (struct device *, const char *, size_t); \
 161 static ssize_t set_##type##n##item (struct device *dev, const char *buf, size_t count) \
 162 { \
 163         struct i2c_client *client = to_i2c_client(dev); \
 164         struct gl520_data *data = i2c_get_clientdata(client); \
 165         return set_##type##item(client, data, buf, count, (n), reg); \
 166 }
 167
 168 #define sysfs_rw_n(type, n, item, reg) \
 169 sysfs_r(type, n, item, reg) \
 170 sysfs_w(type, n, item, reg) \
 171 static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
 172
 173 #define sysfs_ro_n(type, n, item, reg) \
 174 sysfs_r(type, n, item, reg) \
 175 static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
 176
 177 #define sysfs_rw(type, item, reg) \
 178 sysfs_r(type, 0, item, reg) \
 179 sysfs_w(type, 0, item, reg) \
 180 static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
 181
 182 #define sysfs_ro(type, item, reg) \
 183 sysfs_r(type, 0, item, reg) \
 184 static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
 185
 186
 187 #define sysfs_vid(n) \
 188 sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
 189
 190 #define device_create_file_vid(client, n) \
 191 device_create_file(&client->dev, &dev_attr_cpu##n##_vid)
 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 device_create_file_in(client, n) \
 199 ({device_create_file(&client->dev, &dev_attr_in##n##_input); \
 200 device_create_file(&client->dev, &dev_attr_in##n##_min); \
 201 device_create_file(&client->dev, &dev_attr_in##n##_max);})
 202
 203 #define sysfs_fan(n) \
 204 sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
 205 sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
 206 sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
 207
 208 #define device_create_file_fan(client, n) \
 209 ({device_create_file(&client->dev, &dev_attr_fan##n##_input); \
 210 device_create_file(&client->dev, &dev_attr_fan##n##_min); \
 211 device_create_file(&client->dev, &dev_attr_fan##n##_div);})
 212
 213 #define sysfs_fan_off(n) \
 214 sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \
 215
 216 #define device_create_file_fan_off(client, n) \
 217 device_create_file(&client->dev, &dev_attr_fan##n##_off)
 218
 219 #define sysfs_temp(n) \
 220 sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
 221 sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
 222 sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
 223
 224 #define device_create_file_temp(client, n) \
 225 ({device_create_file(&client->dev, &dev_attr_temp##n##_input); \
 226 device_create_file(&client->dev, &dev_attr_temp##n##_max); \
 227 device_create_file(&client->dev, &dev_attr_temp##n##_max_hyst);})
 228
 229 #define sysfs_alarms() \
 230 sysfs_ro(alarms, , GL520_REG_ALARMS) \
 231 sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
 232 sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
 233
 234 #define device_create_file_alarms(client) \
 235 ({device_create_file(&client->dev, &dev_attr_alarms); \
 236 device_create_file(&client->dev, &dev_attr_beep_enable); \
 237 device_create_file(&client->dev, &dev_attr_beep_mask);})
 238
 239
 240 sysfs_vid(0)
 241
 242 sysfs_in(0)
 243 sysfs_in(1)
 244 sysfs_in(2)
 245 sysfs_in(3)
 246 sysfs_in(4)
 247
 248 sysfs_fan(1)
 249 sysfs_fan(2)
 250 sysfs_fan_off(1)
 251
 252 sysfs_temp(1)
 253 sysfs_temp(2)
 254
 255 sysfs_alarms()
 256
 257
 258 static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
 259 {
 260         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 261 }
 262
 263 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 264 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 265
 266 #define IN_FROM_REG(val) ((val)*19)
 267 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 268
 269 static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
 270 {
 271         u8 r = data->in_input[n];
 272
 273         if (n == 0)
 274                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 275         else
 276                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 277 }
 278
 279 static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
 280 {
 281         u8 r = data->in_min[n];
 282
 283         if (n == 0)
 284                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 285         else
 286                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 287 }
 288
 289 static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
 290 {
 291         u8 r = data->in_max[n];
 292
 293         if (n == 0)
 294                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 295         else
 296                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 297 }
 298
 299 static ssize_t set_in_min(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         down(&data->update_lock);
 305
 306         if (n == 0)
 307                 r = VDD_TO_REG(v);
 308         else
 309                 r = IN_TO_REG(v);
 310
 311         data->in_min[n] = r;
 312
 313         if (n < 4)
 314                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 315         else
 316                 gl520_write_value(client, reg, r);
 317
 318         up(&data->update_lock);
 319         return count;
 320 }
 321
 322 static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 323 {
 324         long v = simple_strtol(buf, NULL, 10);
 325         u8 r;
 326
 327         if (n == 0)
 328                 r = VDD_TO_REG(v);
 329         else
 330                 r = IN_TO_REG(v);
 331
 332         down(&data->update_lock);
 333
 334         data->in_max[n] = r;
 335
 336         if (n < 4)
 337                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 338         else
 339                 gl520_write_value(client, reg, r);
 340
 341         up(&data->update_lock);
 342         return count;
 343 }
 344
 345 #define DIV_FROM_REG(val) (1 << (val))
 346 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 347 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 348
 349 static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
 350 {
 351         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
 352 }
 353
 354 static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
 355 {
 356         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
 357 }
 358
 359 static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
 360 {
 361         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
 362 }
 363
 364 static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
 365 {
 366         return sprintf(buf, "%d\n", data->fan_off);
 367 }
 368
 369 static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 370 {
 371         unsigned long v = simple_strtoul(buf, NULL, 10);
 372         u8 r;
 373
 374         down(&data->update_lock);
 375         r = FAN_TO_REG(v, data->fan_div[n - 1]);
 376         data->fan_min[n - 1] = r;
 377
 378         if (n == 1)
 379                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
 380         else
 381                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
 382
 383         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 384         if (data->fan_min[n - 1] == 0)
 385                 data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
 386         else
 387                 data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
 388         data->beep_mask &= data->alarm_mask;
 389         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 390
 391         up(&data->update_lock);
 392         return count;
 393 }
 394
 395 static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 396 {
 397         unsigned long v = simple_strtoul(buf, NULL, 10);
 398         u8 r;
 399
 400         switch (v) {
 401         case 1: r = 0; break;
 402         case 2: r = 1; break;
 403         case 4: r = 2; break;
 404         case 8: r = 3; break;
 405         default:
 406                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 407                 return -EINVAL;
 408         }
 409
 410         down(&data->update_lock);
 411         data->fan_div[n - 1] = r;
 412
 413         if (n == 1)
 414                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
 415         else
 416                 gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
 417
 418         up(&data->update_lock);
 419         return count;
 420 }
 421
 422 static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 423 {
 424         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 425
 426         down(&data->update_lock);
 427         data->fan_off = r;
 428         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
 429         up(&data->update_lock);
 430         return count;
 431 }
 432
 433 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 434 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 435
 436 static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
 437 {
 438         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
 439 }
 440
 441 static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
 442 {
 443         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
 444 }
 445
 446 static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
 447 {
 448         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
 449 }
 450
 451 static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 452 {
 453         long v = simple_strtol(buf, NULL, 10);
 454
 455         down(&data->update_lock);
 456         data->temp_max[n - 1] = TEMP_TO_REG(v);;
 457         gl520_write_value(client, reg, data->temp_max[n - 1]);
 458         up(&data->update_lock);
 459         return count;
 460 }
 461
 462 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)
 463 {
 464         long v = simple_strtol(buf, NULL, 10);
 465
 466         down(&data->update_lock);
 467         data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
 468         gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
 469         up(&data->update_lock);
 470         return count;
 471 }
 472
 473 static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
 474 {
 475         return sprintf(buf, "%d\n", data->alarms);
 476 }
 477
 478 static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
 479 {
 480         return sprintf(buf, "%d\n", data->beep_enable);
 481 }
 482
 483 static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
 484 {
 485         return sprintf(buf, "%d\n", data->beep_mask);
 486 }
 487
 488 static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 489 {
 490         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 491
 492         down(&data->update_lock);
 493         data->beep_enable = !r;
 494         gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
 495         up(&data->update_lock);
 496         return count;
 497 }
 498
 499 static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
 500 {
 501         u8 r = simple_strtoul(buf, NULL, 10);
 502
 503         down(&data->update_lock);
 504         r &= data->alarm_mask;
 505         data->beep_mask = r;
 506         gl520_write_value(client, reg, r);
 507         up(&data->update_lock);
 508         return count;
 509 }
 510
 511
 512 /*
 513  * Real code
 514  */
 515
 516 static int gl520_attach_adapter(struct i2c_adapter *adapter)
 517 {
 518         if (!(adapter->class & I2C_CLASS_HWMON))
 519                 return 0;
 520         return i2c_detect(adapter, &addr_data, gl520_detect);
 521 }
 522
 523 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
 524 {
 525         struct i2c_client *new_client;
 526         struct gl520_data *data;
 527         int err = 0;
 528
 529         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 530                                      I2C_FUNC_SMBUS_WORD_DATA))
 531                 goto exit;
 532
 533         /* OK. For now, we presume we have a valid client. We now create the
 534            client structure, even though we cannot fill it completely yet.
 535            But it allows us to access gl520_{read,write}_value. */
 536
 537         if (!(data = kmalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
 538                 err = -ENOMEM;
 539                 goto exit;
 540         }
 541         memset(data, 0, sizeof(struct gl520_data));
 542
 543         new_client = &data->client;
 544         i2c_set_clientdata(new_client, data);
 545         new_client->addr = address;
 546         new_client->adapter = adapter;
 547         new_client->driver = &gl520_driver;
 548         new_client->flags = 0;
 549
 550         /* Determine the chip type. */
 551         if (kind < 0) {
 552                 if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) ||
 553                     ((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 554                     ((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) {
 555                         dev_dbg(&new_client->dev, "Unknown chip type, skipping\n");
 556                         goto exit_free;
 557                 }
 558         }
 559
 560         /* Fill in the remaining client fields */
 561         strlcpy(new_client->name, "gl520sm", I2C_NAME_SIZE);
 562         data->valid = 0;
 563         init_MUTEX(&data->update_lock);
 564
 565         /* Tell the I2C layer a new client has arrived */
 566         if ((err = i2c_attach_client(new_client)))
 567                 goto exit_free;
 568
 569         /* Initialize the GL520SM chip */
 570         gl520_init_client(new_client);
 571
 572         /* Register sysfs hooks */
 573         device_create_file_vid(new_client, 0);
 574
 575         device_create_file_in(new_client, 0);
 576         device_create_file_in(new_client, 1);
 577         device_create_file_in(new_client, 2);
 578         device_create_file_in(new_client, 3);
 579         if (!data->two_temps)
 580                 device_create_file_in(new_client, 4);
 581
 582         device_create_file_fan(new_client, 1);
 583         device_create_file_fan(new_client, 2);
 584         device_create_file_fan_off(new_client, 1);
 585
 586         device_create_file_temp(new_client, 1);
 587         if (data->two_temps)
 588                 device_create_file_temp(new_client, 2);
 589
 590         device_create_file_alarms(new_client);
 591
 592         return 0;
 593
 594 exit_free:
 595         kfree(data);
 596 exit:
 597         return err;
 598 }
 599
 600
 601 /* Called when we have found a new GL520SM. */
 602 static void gl520_init_client(struct i2c_client *client)
 603 {
 604         struct gl520_data *data = i2c_get_clientdata(client);
 605         u8 oldconf, conf;
 606
 607         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 608
 609         data->alarm_mask = 0xff;
 610         data->vrm = i2c_which_vrm();
 611
 612         if (extra_sensor_type == 1)
 613                 conf &= ~0x10;
 614         else if (extra_sensor_type == 2)
 615                 conf |= 0x10;
 616         data->two_temps = !(conf & 0x10);
 617
 618         /* If IRQ# is disabled, we can safely force comparator mode */
 619         if (!(conf & 0x20))
 620                 conf &= 0xf7;
 621
 622         /* Enable monitoring if needed */
 623         conf |= 0x40;
 624
 625         if (conf != oldconf)
 626                 gl520_write_value(client, GL520_REG_CONF, conf);
 627
 628         gl520_update_device(&(client->dev));
 629
 630         if (data->fan_min[0] == 0)
 631                 data->alarm_mask &= ~0x20;
 632         if (data->fan_min[1] == 0)
 633                 data->alarm_mask &= ~0x40;
 634
 635         data->beep_mask &= data->alarm_mask;
 636         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 637 }
 638
 639 static int gl520_detach_client(struct i2c_client *client)
 640 {
 641         int err;
 642
 643         if ((err = i2c_detach_client(client))) {
 644                 dev_err(&client->dev, "Client deregistration failed, "
 645                         "client not detached.\n");
 646                 return err;
 647         }
 648
 649         kfree(i2c_get_clientdata(client));
 650         return 0;
 651 }
 652
 653
 654 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 655    GL520 uses a high-byte first convention */
 656 static int gl520_read_value(struct i2c_client *client, u8 reg)
 657 {
 658         if ((reg >= 0x07) && (reg <= 0x0c))
 659                 return swab16(i2c_smbus_read_word_data(client, reg));
 660         else
 661                 return i2c_smbus_read_byte_data(client, reg);
 662 }
 663
 664 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 665 {
 666         if ((reg >= 0x07) && (reg <= 0x0c))
 667                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 668         else
 669                 return i2c_smbus_write_byte_data(client, reg, value);
 670 }
 671
 672
 673 static struct gl520_data *gl520_update_device(struct device *dev)
 674 {
 675         struct i2c_client *client = to_i2c_client(dev);
 676         struct gl520_data *data = i2c_get_clientdata(client);
 677         int val;
 678
 679         down(&data->update_lock);
 680
 681         if ((jiffies - data->last_updated > 2 * HZ) ||
 682             (jiffies < data->last_updated) || !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);