drivers/hwmon/gl520sm.c

   1 /*
   2     gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
   3                 monitoring
   4     Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>,
   5                               Kyösti Mälkki <kmalkki@cc.hut.fi>
   6     Copyright (c) 2005        Maarten Deprez <maartendeprez@users.sourceforge.net>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/i2c.h>
  29 #include <linux/hwmon.h>
  30 #include <linux/hwmon-sysfs.h>
  31 #include <linux/hwmon-vid.h>
  32 #include <linux/err.h>
  33 #include <linux/mutex.h>
  34 #include <linux/sysfs.h>
  35
  36 /* Type of the extra sensor */
  37 static unsigned short extra_sensor_type;
  38 module_param(extra_sensor_type, ushort, 0);
  39 MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  40
  41 /* Addresses to scan */
  42 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  43
  44 /* Insmod parameters */
  45 I2C_CLIENT_INSMOD_1(gl520sm);
  46
  47 /* Many GL520 constants specified below
  48 One of the inputs can be configured as either temp or voltage.
  49 That's why _TEMP2 and _IN4 access the same register
  50 */
  51
  52 /* The GL520 registers */
  53 #define GL520_REG_CHIP_ID               0x00
  54 #define GL520_REG_REVISION              0x01
  55 #define GL520_REG_CONF                  0x03
  56 #define GL520_REG_MASK                  0x11
  57
  58 #define GL520_REG_VID_INPUT             0x02
  59
  60 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
  61 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
  62 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
  63 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
  64
  65 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
  66 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
  67 static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
  68
  69 #define GL520_REG_FAN_INPUT             0x07
  70 #define GL520_REG_FAN_MIN               0x08
  71 #define GL520_REG_FAN_DIV               0x0f
  72 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  73
  74 #define GL520_REG_ALARMS                0x12
  75 #define GL520_REG_BEEP_MASK             0x10
  76 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  77
  78 /*
  79  * Function declarations
  80  */
  81
  82 static int gl520_probe(struct i2c_client *client,
  83                        const struct i2c_device_id *id);
  84 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
  85 static void gl520_init_client(struct i2c_client *client);
  86 static int gl520_remove(struct i2c_client *client);
  87 static int gl520_read_value(struct i2c_client *client, u8 reg);
  88 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
  89 static struct gl520_data *gl520_update_device(struct device *dev);
  90
  91 /* Driver data */
  92 static const struct i2c_device_id gl520_id[] = {
  93         { "gl520sm", gl520sm },
  94         { }
  95 };
  96 MODULE_DEVICE_TABLE(i2c, gl520_id);
  97
  98 static struct i2c_driver gl520_driver = {
  99         .class          = I2C_CLASS_HWMON,
 100         .driver = {
 101                 .name   = "gl520sm",
 102         },
 103         .probe          = gl520_probe,
 104         .remove         = gl520_remove,
 105         .id_table       = gl520_id,
 106         .detect         = gl520_detect,
 107         .address_list   = normal_i2c,
 108 };
 109
 110 /* Client data */
 111 struct gl520_data {
 112         struct device *hwmon_dev;
 113         struct mutex update_lock;
 114         char valid;             /* zero until the following fields are valid */
 115         unsigned long last_updated;     /* in jiffies */
 116
 117         u8 vid;
 118         u8 vrm;
 119         u8 in_input[5];         /* [0] = VVD */
 120         u8 in_min[5];           /* [0] = VDD */
 121         u8 in_max[5];           /* [0] = VDD */
 122         u8 fan_input[2];
 123         u8 fan_min[2];
 124         u8 fan_div[2];
 125         u8 fan_off;
 126         u8 temp_input[2];
 127         u8 temp_max[2];
 128         u8 temp_max_hyst[2];
 129         u8 alarms;
 130         u8 beep_enable;
 131         u8 beep_mask;
 132         u8 alarm_mask;
 133         u8 two_temps;
 134 };
 135
 136 /*
 137  * Sysfs stuff
 138  */
 139
 140 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
 141                            char *buf)
 142 {
 143         struct gl520_data *data = gl520_update_device(dev);
 144         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 145 }
 146 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
 147
 148 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 149 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 150
 151 #define IN_FROM_REG(val) ((val)*19)
 152 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 153
 154 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
 155                             char *buf)
 156 {
 157         int n = to_sensor_dev_attr(attr)->index;
 158         struct gl520_data *data = gl520_update_device(dev);
 159         u8 r = data->in_input[n];
 160
 161         if (n == 0)
 162                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 163         else
 164                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 165 }
 166
 167 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
 168                           char *buf)
 169 {
 170         int n = to_sensor_dev_attr(attr)->index;
 171         struct gl520_data *data = gl520_update_device(dev);
 172         u8 r = data->in_min[n];
 173
 174         if (n == 0)
 175                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 176         else
 177                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 178 }
 179
 180 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
 181                           char *buf)
 182 {
 183         int n = to_sensor_dev_attr(attr)->index;
 184         struct gl520_data *data = gl520_update_device(dev);
 185         u8 r = data->in_max[n];
 186
 187         if (n == 0)
 188                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 189         else
 190                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 191 }
 192
 193 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 194                           const char *buf, size_t count)
 195 {
 196         struct i2c_client *client = to_i2c_client(dev);
 197         struct gl520_data *data = i2c_get_clientdata(client);
 198         int n = to_sensor_dev_attr(attr)->index;
 199         long v = simple_strtol(buf, NULL, 10);
 200         u8 r;
 201
 202         mutex_lock(&data->update_lock);
 203
 204         if (n == 0)
 205                 r = VDD_TO_REG(v);
 206         else
 207                 r = IN_TO_REG(v);
 208
 209         data->in_min[n] = r;
 210
 211         if (n < 4)
 212                 gl520_write_value(client, GL520_REG_IN_MIN[n],
 213                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
 214                                    & ~0xff) | r);
 215         else
 216                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 217
 218         mutex_unlock(&data->update_lock);
 219         return count;
 220 }
 221
 222 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 223                           const char *buf, size_t count)
 224 {
 225         struct i2c_client *client = to_i2c_client(dev);
 226         struct gl520_data *data = i2c_get_clientdata(client);
 227         int n = to_sensor_dev_attr(attr)->index;
 228         long v = simple_strtol(buf, NULL, 10);
 229         u8 r;
 230
 231         if (n == 0)
 232                 r = VDD_TO_REG(v);
 233         else
 234                 r = IN_TO_REG(v);
 235
 236         mutex_lock(&data->update_lock);
 237
 238         data->in_max[n] = r;
 239
 240         if (n < 4)
 241                 gl520_write_value(client, GL520_REG_IN_MAX[n],
 242                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
 243                                    & ~0xff00) | (r << 8));
 244         else
 245                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 246
 247         mutex_unlock(&data->update_lock);
 248         return count;
 249 }
 250
 251 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
 252 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
 253 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
 254 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
 255 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
 256 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
 257                 get_in_min, set_in_min, 0);
 258 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
 259                 get_in_min, set_in_min, 1);
 260 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
 261                 get_in_min, set_in_min, 2);
 262 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
 263                 get_in_min, set_in_min, 3);
 264 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
 265                 get_in_min, set_in_min, 4);
 266 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
 267                 get_in_max, set_in_max, 0);
 268 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
 269                 get_in_max, set_in_max, 1);
 270 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
 271                 get_in_max, set_in_max, 2);
 272 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
 273                 get_in_max, set_in_max, 3);
 274 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
 275                 get_in_max, set_in_max, 4);
 276
 277 #define DIV_FROM_REG(val) (1 << (val))
 278 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 279 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 280
 281 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
 282                              char *buf)
 283 {
 284         int n = to_sensor_dev_attr(attr)->index;
 285         struct gl520_data *data = gl520_update_device(dev);
 286
 287         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 288                                                  data->fan_div[n]));
 289 }
 290
 291 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
 292                            char *buf)
 293 {
 294         int n = to_sensor_dev_attr(attr)->index;
 295         struct gl520_data *data = gl520_update_device(dev);
 296
 297         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 298                                                  data->fan_div[n]));
 299 }
 300
 301 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
 302                            char *buf)
 303 {
 304         int n = to_sensor_dev_attr(attr)->index;
 305         struct gl520_data *data = gl520_update_device(dev);
 306
 307         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 308 }
 309
 310 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
 311                            char *buf)
 312 {
 313         struct gl520_data *data = gl520_update_device(dev);
 314         return sprintf(buf, "%d\n", data->fan_off);
 315 }
 316
 317 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 318                            const char *buf, size_t count)
 319 {
 320         struct i2c_client *client = to_i2c_client(dev);
 321         struct gl520_data *data = i2c_get_clientdata(client);
 322         int n = to_sensor_dev_attr(attr)->index;
 323         unsigned long v = simple_strtoul(buf, NULL, 10);
 324         u8 r;
 325
 326         mutex_lock(&data->update_lock);
 327         r = FAN_TO_REG(v, data->fan_div[n]);
 328         data->fan_min[n] = r;
 329
 330         if (n == 0)
 331                 gl520_write_value(client, GL520_REG_FAN_MIN,
 332                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 333                                    & ~0xff00) | (r << 8));
 334         else
 335                 gl520_write_value(client, GL520_REG_FAN_MIN,
 336                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 337                                    & ~0xff) | r);
 338
 339         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 340         if (data->fan_min[n] == 0)
 341                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 342         else
 343                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 344         data->beep_mask &= data->alarm_mask;
 345         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 346
 347         mutex_unlock(&data->update_lock);
 348         return count;
 349 }
 350
 351 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 352                            const char *buf, size_t count)
 353 {
 354         struct i2c_client *client = to_i2c_client(dev);
 355         struct gl520_data *data = i2c_get_clientdata(client);
 356         int n = to_sensor_dev_attr(attr)->index;
 357         unsigned long v = simple_strtoul(buf, NULL, 10);
 358         u8 r;
 359
 360         switch (v) {
 361         case 1: r = 0; break;
 362         case 2: r = 1; break;
 363         case 4: r = 2; break;
 364         case 8: r = 3; break;
 365         default:
 366                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 367                 return -EINVAL;
 368         }
 369
 370         mutex_lock(&data->update_lock);
 371         data->fan_div[n] = r;
 372
 373         if (n == 0)
 374                 gl520_write_value(client, GL520_REG_FAN_DIV,
 375                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 376                                    & ~0xc0) | (r << 6));
 377         else
 378                 gl520_write_value(client, GL520_REG_FAN_DIV,
 379                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 380                                    & ~0x30) | (r << 4));
 381
 382         mutex_unlock(&data->update_lock);
 383         return count;
 384 }
 385
 386 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
 387                            const char *buf, size_t count)
 388 {
 389         struct i2c_client *client = to_i2c_client(dev);
 390         struct gl520_data *data = i2c_get_clientdata(client);
 391         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 392
 393         mutex_lock(&data->update_lock);
 394         data->fan_off = r;
 395         gl520_write_value(client, GL520_REG_FAN_OFF,
 396                           (gl520_read_value(client, GL520_REG_FAN_OFF)
 397                            & ~0x0c) | (r << 2));
 398         mutex_unlock(&data->update_lock);
 399         return count;
 400 }
 401
 402 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
 403 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
 404 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 405                 get_fan_min, set_fan_min, 0);
 406 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 407                 get_fan_min, set_fan_min, 1);
 408 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 409                 get_fan_div, set_fan_div, 0);
 410 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 411                 get_fan_div, set_fan_div, 1);
 412 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
 413                 get_fan_off, set_fan_off);
 414
 415 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 416 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 417
 418 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
 419                               char *buf)
 420 {
 421         int n = to_sensor_dev_attr(attr)->index;
 422         struct gl520_data *data = gl520_update_device(dev);
 423
 424         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 425 }
 426
 427 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
 428                             char *buf)
 429 {
 430         int n = to_sensor_dev_attr(attr)->index;
 431         struct gl520_data *data = gl520_update_device(dev);
 432
 433         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 434 }
 435
 436 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
 437                                  *attr, char *buf)
 438 {
 439         int n = to_sensor_dev_attr(attr)->index;
 440         struct gl520_data *data = gl520_update_device(dev);
 441
 442         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 443 }
 444
 445 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 446                             const char *buf, size_t count)
 447 {
 448         struct i2c_client *client = to_i2c_client(dev);
 449         struct gl520_data *data = i2c_get_clientdata(client);
 450         int n = to_sensor_dev_attr(attr)->index;
 451         long v = simple_strtol(buf, NULL, 10);
 452
 453         mutex_lock(&data->update_lock);
 454         data->temp_max[n] = TEMP_TO_REG(v);
 455         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 456         mutex_unlock(&data->update_lock);
 457         return count;
 458 }
 459
 460 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
 461                                  *attr, const char *buf, size_t count)
 462 {
 463         struct i2c_client *client = to_i2c_client(dev);
 464         struct gl520_data *data = i2c_get_clientdata(client);
 465         int n = to_sensor_dev_attr(attr)->index;
 466         long v = simple_strtol(buf, NULL, 10);
 467
 468         mutex_lock(&data->update_lock);
 469         data->temp_max_hyst[n] = TEMP_TO_REG(v);
 470         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 471                           data->temp_max_hyst[n]);
 472         mutex_unlock(&data->update_lock);
 473         return count;
 474 }
 475
 476 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
 477 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
 478 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 479                 get_temp_max, set_temp_max, 0);
 480 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
 481                 get_temp_max, set_temp_max, 1);
 482 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 483                 get_temp_max_hyst, set_temp_max_hyst, 0);
 484 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
 485                 get_temp_max_hyst, set_temp_max_hyst, 1);
 486
 487 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
 488                           char *buf)
 489 {
 490         struct gl520_data *data = gl520_update_device(dev);
 491         return sprintf(buf, "%d\n", data->alarms);
 492 }
 493
 494 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
 495                                *attr, char *buf)
 496 {
 497         struct gl520_data *data = gl520_update_device(dev);
 498         return sprintf(buf, "%d\n", data->beep_enable);
 499 }
 500
 501 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
 502                              char *buf)
 503 {
 504         struct gl520_data *data = gl520_update_device(dev);
 505         return sprintf(buf, "%d\n", data->beep_mask);
 506 }
 507
 508 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
 509                                *attr, const char *buf, size_t count)
 510 {
 511         struct i2c_client *client = to_i2c_client(dev);
 512         struct gl520_data *data = i2c_get_clientdata(client);
 513         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 514
 515         mutex_lock(&data->update_lock);
 516         data->beep_enable = !r;
 517         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 518                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 519                            & ~0x04) | (r << 2));
 520         mutex_unlock(&data->update_lock);
 521         return count;
 522 }
 523
 524 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
 525                              const char *buf, size_t count)
 526 {
 527         struct i2c_client *client = to_i2c_client(dev);
 528         struct gl520_data *data = i2c_get_clientdata(client);
 529         u8 r = simple_strtoul(buf, NULL, 10);
 530
 531         mutex_lock(&data->update_lock);
 532         r &= data->alarm_mask;
 533         data->beep_mask = r;
 534         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 535         mutex_unlock(&data->update_lock);
 536         return count;
 537 }
 538
 539 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 540 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 541                 get_beep_enable, set_beep_enable);
 542 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 543                 get_beep_mask, set_beep_mask);
 544
 545 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
 546                          char *buf)
 547 {
 548         int bit_nr = to_sensor_dev_attr(attr)->index;
 549         struct gl520_data *data = gl520_update_device(dev);
 550
 551         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 552 }
 553
 554 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
 555 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
 556 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
 557 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
 558 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
 559 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
 560 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
 561 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
 562 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
 563
 564 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
 565                         char *buf)
 566 {
 567         int bitnr = to_sensor_dev_attr(attr)->index;
 568         struct gl520_data *data = gl520_update_device(dev);
 569
 570         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 571 }
 572
 573 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 574                         const char *buf, size_t count)
 575 {
 576         struct i2c_client *client = to_i2c_client(dev);
 577         struct gl520_data *data = i2c_get_clientdata(client);
 578         int bitnr = to_sensor_dev_attr(attr)->index;
 579         unsigned long bit;
 580
 581         bit = simple_strtoul(buf, NULL, 10);
 582         if (bit & ~1)
 583                 return -EINVAL;
 584
 585         mutex_lock(&data->update_lock);
 586         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 587         if (bit)
 588                 data->beep_mask |= (1 << bitnr);
 589         else
 590                 data->beep_mask &= ~(1 << bitnr);
 591         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 592         mutex_unlock(&data->update_lock);
 593         return count;
 594 }
 595
 596 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
 597 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
 598 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
 599 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
 600 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
 601 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
 602 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
 603 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 604 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 605
 606 static struct attribute *gl520_attributes[] = {
 607         &dev_attr_cpu0_vid.attr,
 608
 609         &sensor_dev_attr_in0_input.dev_attr.attr,
 610         &sensor_dev_attr_in0_min.dev_attr.attr,
 611         &sensor_dev_attr_in0_max.dev_attr.attr,
 612         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 613         &sensor_dev_attr_in0_beep.dev_attr.attr,
 614         &sensor_dev_attr_in1_input.dev_attr.attr,
 615         &sensor_dev_attr_in1_min.dev_attr.attr,
 616         &sensor_dev_attr_in1_max.dev_attr.attr,
 617         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 618         &sensor_dev_attr_in1_beep.dev_attr.attr,
 619         &sensor_dev_attr_in2_input.dev_attr.attr,
 620         &sensor_dev_attr_in2_min.dev_attr.attr,
 621         &sensor_dev_attr_in2_max.dev_attr.attr,
 622         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 623         &sensor_dev_attr_in2_beep.dev_attr.attr,
 624         &sensor_dev_attr_in3_input.dev_attr.attr,
 625         &sensor_dev_attr_in3_min.dev_attr.attr,
 626         &sensor_dev_attr_in3_max.dev_attr.attr,
 627         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 628         &sensor_dev_attr_in3_beep.dev_attr.attr,
 629
 630         &sensor_dev_attr_fan1_input.dev_attr.attr,
 631         &sensor_dev_attr_fan1_min.dev_attr.attr,
 632         &sensor_dev_attr_fan1_div.dev_attr.attr,
 633         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 634         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 635         &dev_attr_fan1_off.attr,
 636         &sensor_dev_attr_fan2_input.dev_attr.attr,
 637         &sensor_dev_attr_fan2_min.dev_attr.attr,
 638         &sensor_dev_attr_fan2_div.dev_attr.attr,
 639         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 640         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 641
 642         &sensor_dev_attr_temp1_input.dev_attr.attr,
 643         &sensor_dev_attr_temp1_max.dev_attr.attr,
 644         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 645         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 646         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 647
 648         &dev_attr_alarms.attr,
 649         &dev_attr_beep_enable.attr,
 650         &dev_attr_beep_mask.attr,
 651         NULL
 652 };
 653
 654 static const struct attribute_group gl520_group = {
 655         .attrs = gl520_attributes,
 656 };
 657
 658 static struct attribute *gl520_attributes_opt[] = {
 659         &sensor_dev_attr_in4_input.dev_attr.attr,
 660         &sensor_dev_attr_in4_min.dev_attr.attr,
 661         &sensor_dev_attr_in4_max.dev_attr.attr,
 662         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 663         &sensor_dev_attr_in4_beep.dev_attr.attr,
 664
 665         &sensor_dev_attr_temp2_input.dev_attr.attr,
 666         &sensor_dev_attr_temp2_max.dev_attr.attr,
 667         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 668         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 669         &sensor_dev_attr_temp2_beep.dev_attr.attr,
 670         NULL
 671 };
 672
 673 static const struct attribute_group gl520_group_opt = {
 674         .attrs = gl520_attributes_opt,
 675 };
 676
 677
 678 /*
 679  * Real code
 680  */
 681
 682 /* Return 0 if detection is successful, -ENODEV otherwise */
 683 static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
 684 {
 685         struct i2c_adapter *adapter = client->adapter;
 686
 687         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 688                                      I2C_FUNC_SMBUS_WORD_DATA))
 689                 return -ENODEV;
 690
 691         /* Determine the chip type. */
 692         if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 693             ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 694             ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 695                 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 696                 return -ENODEV;
 697         }
 698
 699         strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
 700
 701         return 0;
 702 }
 703
 704 static int gl520_probe(struct i2c_client *client,
 705                        const struct i2c_device_id *id)
 706 {
 707         struct gl520_data *data;
 708         int err;
 709
 710         data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
 711         if (!data) {
 712                 err = -ENOMEM;
 713                 goto exit;
 714         }
 715
 716         i2c_set_clientdata(client, data);
 717         mutex_init(&data->update_lock);
 718
 719         /* Initialize the GL520SM chip */
 720         gl520_init_client(client);
 721
 722         /* Register sysfs hooks */
 723         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
 724                 goto exit_free;
 725
 726         if (data->two_temps) {
 727                 if ((err = device_create_file(&client->dev,
 728                                 &sensor_dev_attr_temp2_input.dev_attr))
 729                  || (err = device_create_file(&client->dev,
 730                                 &sensor_dev_attr_temp2_max.dev_attr))
 731                  || (err = device_create_file(&client->dev,
 732                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
 733                  || (err = device_create_file(&client->dev,
 734                                 &sensor_dev_attr_temp2_alarm.dev_attr))
 735                  || (err = device_create_file(&client->dev,
 736                                 &sensor_dev_attr_temp2_beep.dev_attr)))
 737                         goto exit_remove_files;
 738         } else {
 739                 if ((err = device_create_file(&client->dev,
 740                                 &sensor_dev_attr_in4_input.dev_attr))
 741                  || (err = device_create_file(&client->dev,
 742                                 &sensor_dev_attr_in4_min.dev_attr))
 743                  || (err = device_create_file(&client->dev,
 744                                 &sensor_dev_attr_in4_max.dev_attr))
 745                  || (err = device_create_file(&client->dev,
 746                                 &sensor_dev_attr_in4_alarm.dev_attr))
 747                  || (err = device_create_file(&client->dev,
 748                                 &sensor_dev_attr_in4_beep.dev_attr)))
 749                         goto exit_remove_files;
 750         }
 751
 752
 753         data->hwmon_dev = hwmon_device_register(&client->dev);
 754         if (IS_ERR(data->hwmon_dev)) {
 755                 err = PTR_ERR(data->hwmon_dev);
 756                 goto exit_remove_files;
 757         }
 758
 759         return 0;
 760
 761 exit_remove_files:
 762         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 763         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 764 exit_free:
 765         kfree(data);
 766 exit:
 767         return err;
 768 }
 769
 770
 771 /* Called when we have found a new GL520SM. */
 772 static void gl520_init_client(struct i2c_client *client)
 773 {
 774         struct gl520_data *data = i2c_get_clientdata(client);
 775         u8 oldconf, conf;
 776
 777         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 778
 779         data->alarm_mask = 0xff;
 780         data->vrm = vid_which_vrm();
 781
 782         if (extra_sensor_type == 1)
 783                 conf &= ~0x10;
 784         else if (extra_sensor_type == 2)
 785                 conf |= 0x10;
 786         data->two_temps = !(conf & 0x10);
 787
 788         /* If IRQ# is disabled, we can safely force comparator mode */
 789         if (!(conf & 0x20))
 790                 conf &= 0xf7;
 791
 792         /* Enable monitoring if needed */
 793         conf |= 0x40;
 794
 795         if (conf != oldconf)
 796                 gl520_write_value(client, GL520_REG_CONF, conf);
 797
 798         gl520_update_device(&(client->dev));
 799
 800         if (data->fan_min[0] == 0)
 801                 data->alarm_mask &= ~0x20;
 802         if (data->fan_min[1] == 0)
 803                 data->alarm_mask &= ~0x40;
 804
 805         data->beep_mask &= data->alarm_mask;
 806         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 807 }
 808
 809 static int gl520_remove(struct i2c_client *client)
 810 {
 811         struct gl520_data *data = i2c_get_clientdata(client);
 812
 813         hwmon_device_unregister(data->hwmon_dev);
 814         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 815         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 816
 817         kfree(data);
 818         return 0;
 819 }
 820
 821
 822 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 823    GL520 uses a high-byte first convention */
 824 static int gl520_read_value(struct i2c_client *client, u8 reg)
 825 {
 826         if ((reg >= 0x07) && (reg <= 0x0c))
 827                 return swab16(i2c_smbus_read_word_data(client, reg));
 828         else
 829                 return i2c_smbus_read_byte_data(client, reg);
 830 }
 831
 832 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 833 {
 834         if ((reg >= 0x07) && (reg <= 0x0c))
 835                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 836         else
 837                 return i2c_smbus_write_byte_data(client, reg, value);
 838 }
 839
 840
 841 static struct gl520_data *gl520_update_device(struct device *dev)
 842 {
 843         struct i2c_client *client = to_i2c_client(dev);
 844         struct gl520_data *data = i2c_get_clientdata(client);
 845         int val, i;
 846
 847         mutex_lock(&data->update_lock);
 848
 849         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 850
 851                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 852
 853                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 854                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 855                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 856
 857                 for (i = 0; i < 4; i++) {
 858                         data->in_input[i] = gl520_read_value(client,
 859                                                         GL520_REG_IN_INPUT[i]);
 860                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 861                         data->in_min[i] = val & 0xff;
 862                         data->in_max[i] = (val >> 8) & 0xff;
 863                 }
 864
 865                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 866                 data->fan_input[0] = (val >> 8) & 0xff;
 867                 data->fan_input[1] = val & 0xff;
 868
 869                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 870                 data->fan_min[0] = (val >> 8) & 0xff;
 871                 data->fan_min[1] = val & 0xff;
 872
 873                 data->temp_input[0] = gl520_read_value(client,
 874                                                 GL520_REG_TEMP_INPUT[0]);
 875                 data->temp_max[0] = gl520_read_value(client,
 876                                                 GL520_REG_TEMP_MAX[0]);
 877                 data->temp_max_hyst[0] = gl520_read_value(client,
 878                                                 GL520_REG_TEMP_MAX_HYST[0]);
 879
 880                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 881                 data->fan_div[0] = (val >> 6) & 0x03;
 882                 data->fan_div[1] = (val >> 4) & 0x03;
 883                 data->fan_off = (val >> 2) & 0x01;
 884
 885                 data->alarms &= data->alarm_mask;
 886
 887                 val = gl520_read_value(client, GL520_REG_CONF);
 888                 data->beep_enable = !((val >> 2) & 1);
 889
 890                 /* Temp1 and Vin4 are the same input */
 891                 if (data->two_temps) {
 892                         data->temp_input[1] = gl520_read_value(client,
 893                                                 GL520_REG_TEMP_INPUT[1]);
 894                         data->temp_max[1] = gl520_read_value(client,
 895                                                 GL520_REG_TEMP_MAX[1]);
 896                         data->temp_max_hyst[1] = gl520_read_value(client,
 897                                                 GL520_REG_TEMP_MAX_HYST[1]);
 898                 } else {
 899                         data->in_input[4] = gl520_read_value(client,
 900                                                 GL520_REG_IN_INPUT[4]);
 901                         data->in_min[4] = gl520_read_value(client,
 902                                                 GL520_REG_IN_MIN[4]);
 903                         data->in_max[4] = gl520_read_value(client,
 904                                                 GL520_REG_IN_MAX[4]);
 905                 }
 906
 907                 data->last_updated = jiffies;
 908                 data->valid = 1;
 909         }
 910
 911         mutex_unlock(&data->update_lock);
 912
 913         return data;
 914 }
 915
 916
 917 static int __init sensors_gl520sm_init(void)
 918 {
 919         return i2c_add_driver(&gl520_driver);
 920 }
 921
 922 static void __exit sensors_gl520sm_exit(void)
 923 {
 924         i2c_del_driver(&gl520_driver);
 925 }
 926
 927
 928 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 929         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 930         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 931 MODULE_DESCRIPTION("GL520SM driver");
 932 MODULE_LICENSE("GPL");
 933
 934 module_init(sensors_gl520sm_init);
 935 module_exit(sensors_gl520sm_exit);