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 <<<<<<< HEAD:drivers/hwmon/gl520sm.c
  43 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  44 =======
  45 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  46 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/hwmon/gl520sm.c
  47
  48 /* Insmod parameters */
  49 I2C_CLIENT_INSMOD_1(gl520sm);
  50
  51 /* Many GL520 constants specified below
  52 One of the inputs can be configured as either temp or voltage.
  53 That's why _TEMP2 and _IN4 access the same register
  54 */
  55
  56 /* The GL520 registers */
  57 #define GL520_REG_CHIP_ID               0x00
  58 #define GL520_REG_REVISION              0x01
  59 #define GL520_REG_CONF                  0x03
  60 #define GL520_REG_MASK                  0x11
  61
  62 #define GL520_REG_VID_INPUT             0x02
  63
  64 static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
  65 static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
  66 static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
  67 static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
  68
  69 static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
  70 static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
  71 static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
  72
  73 #define GL520_REG_FAN_INPUT             0x07
  74 #define GL520_REG_FAN_MIN               0x08
  75 #define GL520_REG_FAN_DIV               0x0f
  76 #define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  77
  78 #define GL520_REG_ALARMS                0x12
  79 #define GL520_REG_BEEP_MASK             0x10
  80 #define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  81
  82 /*
  83  * Function declarations
  84  */
  85
  86 static int gl520_attach_adapter(struct i2c_adapter *adapter);
  87 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
  88 static void gl520_init_client(struct i2c_client *client);
  89 static int gl520_detach_client(struct i2c_client *client);
  90 static int gl520_read_value(struct i2c_client *client, u8 reg);
  91 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
  92 static struct gl520_data *gl520_update_device(struct device *dev);
  93
  94 /* Driver data */
  95 static struct i2c_driver gl520_driver = {
  96         .driver = {
  97                 .name   = "gl520sm",
  98         },
  99         .attach_adapter = gl520_attach_adapter,
 100         .detach_client  = gl520_detach_client,
 101 };
 102
 103 /* Client data */
 104 struct gl520_data {
 105         struct i2c_client client;
 106         struct device *hwmon_dev;
 107         struct mutex update_lock;
 108         char valid;             /* zero until the following fields are valid */
 109         unsigned long last_updated;     /* in jiffies */
 110
 111         u8 vid;
 112         u8 vrm;
 113         u8 in_input[5];         /* [0] = VVD */
 114         u8 in_min[5];           /* [0] = VDD */
 115         u8 in_max[5];           /* [0] = VDD */
 116         u8 fan_input[2];
 117         u8 fan_min[2];
 118         u8 fan_div[2];
 119         u8 fan_off;
 120         u8 temp_input[2];
 121         u8 temp_max[2];
 122         u8 temp_max_hyst[2];
 123         u8 alarms;
 124         u8 beep_enable;
 125         u8 beep_mask;
 126         u8 alarm_mask;
 127         u8 two_temps;
 128 };
 129
 130 /*
 131  * Sysfs stuff
 132  */
 133
 134 static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
 135                            char *buf)
 136 {
 137         struct gl520_data *data = gl520_update_device(dev);
 138         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 139 }
 140 static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
 141
 142 #define VDD_FROM_REG(val) (((val)*95+2)/4)
 143 #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 144
 145 #define IN_FROM_REG(val) ((val)*19)
 146 #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
 147
 148 static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
 149                             char *buf)
 150 {
 151         int n = to_sensor_dev_attr(attr)->index;
 152         struct gl520_data *data = gl520_update_device(dev);
 153         u8 r = data->in_input[n];
 154
 155         if (n == 0)
 156                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 157         else
 158                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 159 }
 160
 161 static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
 162                           char *buf)
 163 {
 164         int n = to_sensor_dev_attr(attr)->index;
 165         struct gl520_data *data = gl520_update_device(dev);
 166         u8 r = data->in_min[n];
 167
 168         if (n == 0)
 169                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 170         else
 171                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 172 }
 173
 174 static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
 175                           char *buf)
 176 {
 177         int n = to_sensor_dev_attr(attr)->index;
 178         struct gl520_data *data = gl520_update_device(dev);
 179         u8 r = data->in_max[n];
 180
 181         if (n == 0)
 182                 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 183         else
 184                 return sprintf(buf, "%d\n", IN_FROM_REG(r));
 185 }
 186
 187 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 188                           const char *buf, size_t count)
 189 {
 190         struct i2c_client *client = to_i2c_client(dev);
 191         struct gl520_data *data = i2c_get_clientdata(client);
 192         int n = to_sensor_dev_attr(attr)->index;
 193         long v = simple_strtol(buf, NULL, 10);
 194         u8 r;
 195
 196         mutex_lock(&data->update_lock);
 197
 198         if (n == 0)
 199                 r = VDD_TO_REG(v);
 200         else
 201                 r = IN_TO_REG(v);
 202
 203         data->in_min[n] = r;
 204
 205         if (n < 4)
 206                 gl520_write_value(client, GL520_REG_IN_MIN[n],
 207                                   (gl520_read_value(client, GL520_REG_IN_MIN[n])
 208                                    & ~0xff) | r);
 209         else
 210                 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 211
 212         mutex_unlock(&data->update_lock);
 213         return count;
 214 }
 215
 216 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 217                           const char *buf, size_t count)
 218 {
 219         struct i2c_client *client = to_i2c_client(dev);
 220         struct gl520_data *data = i2c_get_clientdata(client);
 221         int n = to_sensor_dev_attr(attr)->index;
 222         long v = simple_strtol(buf, NULL, 10);
 223         u8 r;
 224
 225         if (n == 0)
 226                 r = VDD_TO_REG(v);
 227         else
 228                 r = IN_TO_REG(v);
 229
 230         mutex_lock(&data->update_lock);
 231
 232         data->in_max[n] = r;
 233
 234         if (n < 4)
 235                 gl520_write_value(client, GL520_REG_IN_MAX[n],
 236                                   (gl520_read_value(client, GL520_REG_IN_MAX[n])
 237                                    & ~0xff00) | (r << 8));
 238         else
 239                 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 240
 241         mutex_unlock(&data->update_lock);
 242         return count;
 243 }
 244
 245 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
 246 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
 247 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
 248 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
 249 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
 250 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
 251                 get_in_min, set_in_min, 0);
 252 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
 253                 get_in_min, set_in_min, 1);
 254 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
 255                 get_in_min, set_in_min, 2);
 256 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
 257                 get_in_min, set_in_min, 3);
 258 static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
 259                 get_in_min, set_in_min, 4);
 260 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
 261                 get_in_max, set_in_max, 0);
 262 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
 263                 get_in_max, set_in_max, 1);
 264 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
 265                 get_in_max, set_in_max, 2);
 266 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
 267                 get_in_max, set_in_max, 3);
 268 static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
 269                 get_in_max, set_in_max, 4);
 270
 271 #define DIV_FROM_REG(val) (1 << (val))
 272 #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
 273 #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
 274
 275 static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
 276                              char *buf)
 277 {
 278         int n = to_sensor_dev_attr(attr)->index;
 279         struct gl520_data *data = gl520_update_device(dev);
 280
 281         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 282                                                  data->fan_div[n]));
 283 }
 284
 285 static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
 286                            char *buf)
 287 {
 288         int n = to_sensor_dev_attr(attr)->index;
 289         struct gl520_data *data = gl520_update_device(dev);
 290
 291         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 292                                                  data->fan_div[n]));
 293 }
 294
 295 static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
 296                            char *buf)
 297 {
 298         int n = to_sensor_dev_attr(attr)->index;
 299         struct gl520_data *data = gl520_update_device(dev);
 300
 301         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 302 }
 303
 304 static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
 305                            char *buf)
 306 {
 307         struct gl520_data *data = gl520_update_device(dev);
 308         return sprintf(buf, "%d\n", data->fan_off);
 309 }
 310
 311 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 312                            const char *buf, size_t count)
 313 {
 314         struct i2c_client *client = to_i2c_client(dev);
 315         struct gl520_data *data = i2c_get_clientdata(client);
 316         int n = to_sensor_dev_attr(attr)->index;
 317         unsigned long v = simple_strtoul(buf, NULL, 10);
 318         u8 r;
 319
 320         mutex_lock(&data->update_lock);
 321         r = FAN_TO_REG(v, data->fan_div[n]);
 322         data->fan_min[n] = r;
 323
 324         if (n == 0)
 325                 gl520_write_value(client, GL520_REG_FAN_MIN,
 326                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 327                                    & ~0xff00) | (r << 8));
 328         else
 329                 gl520_write_value(client, GL520_REG_FAN_MIN,
 330                                   (gl520_read_value(client, GL520_REG_FAN_MIN)
 331                                    & ~0xff) | r);
 332
 333         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 334         if (data->fan_min[n] == 0)
 335                 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 336         else
 337                 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 338         data->beep_mask &= data->alarm_mask;
 339         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 340
 341         mutex_unlock(&data->update_lock);
 342         return count;
 343 }
 344
 345 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 346                            const char *buf, size_t count)
 347 {
 348         struct i2c_client *client = to_i2c_client(dev);
 349         struct gl520_data *data = i2c_get_clientdata(client);
 350         int n = to_sensor_dev_attr(attr)->index;
 351         unsigned long v = simple_strtoul(buf, NULL, 10);
 352         u8 r;
 353
 354         switch (v) {
 355         case 1: r = 0; break;
 356         case 2: r = 1; break;
 357         case 4: r = 2; break;
 358         case 8: r = 3; break;
 359         default:
 360                 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 361                 return -EINVAL;
 362         }
 363
 364         mutex_lock(&data->update_lock);
 365         data->fan_div[n] = r;
 366
 367         if (n == 0)
 368                 gl520_write_value(client, GL520_REG_FAN_DIV,
 369                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 370                                    & ~0xc0) | (r << 6));
 371         else
 372                 gl520_write_value(client, GL520_REG_FAN_DIV,
 373                                   (gl520_read_value(client, GL520_REG_FAN_DIV)
 374                                    & ~0x30) | (r << 4));
 375
 376         mutex_unlock(&data->update_lock);
 377         return count;
 378 }
 379
 380 static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
 381                            const char *buf, size_t count)
 382 {
 383         struct i2c_client *client = to_i2c_client(dev);
 384         struct gl520_data *data = i2c_get_clientdata(client);
 385         u8 r = simple_strtoul(buf, NULL, 10)?1:0;
 386
 387         mutex_lock(&data->update_lock);
 388         data->fan_off = r;
 389         gl520_write_value(client, GL520_REG_FAN_OFF,
 390                           (gl520_read_value(client, GL520_REG_FAN_OFF)
 391                            & ~0x0c) | (r << 2));
 392         mutex_unlock(&data->update_lock);
 393         return count;
 394 }
 395
 396 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
 397 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
 398 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 399                 get_fan_min, set_fan_min, 0);
 400 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 401                 get_fan_min, set_fan_min, 1);
 402 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 403                 get_fan_div, set_fan_div, 0);
 404 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 405                 get_fan_div, set_fan_div, 1);
 406 static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
 407                 get_fan_off, set_fan_off);
 408
 409 #define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 410 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
 411
 412 static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
 413                               char *buf)
 414 {
 415         int n = to_sensor_dev_attr(attr)->index;
 416         struct gl520_data *data = gl520_update_device(dev);
 417
 418         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 419 }
 420
 421 static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
 422                             char *buf)
 423 {
 424         int n = to_sensor_dev_attr(attr)->index;
 425         struct gl520_data *data = gl520_update_device(dev);
 426
 427         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 428 }
 429
 430 static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
 431                                  *attr, char *buf)
 432 {
 433         int n = to_sensor_dev_attr(attr)->index;
 434         struct gl520_data *data = gl520_update_device(dev);
 435
 436         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 437 }
 438
 439 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 440                             const char *buf, size_t count)
 441 {
 442         struct i2c_client *client = to_i2c_client(dev);
 443         struct gl520_data *data = i2c_get_clientdata(client);
 444         int n = to_sensor_dev_attr(attr)->index;
 445         long v = simple_strtol(buf, NULL, 10);
 446
 447         mutex_lock(&data->update_lock);
 448         data->temp_max[n] = TEMP_TO_REG(v);
 449         gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 450         mutex_unlock(&data->update_lock);
 451         return count;
 452 }
 453
 454 static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
 455                                  *attr, const char *buf, size_t count)
 456 {
 457         struct i2c_client *client = to_i2c_client(dev);
 458         struct gl520_data *data = i2c_get_clientdata(client);
 459         int n = to_sensor_dev_attr(attr)->index;
 460         long v = simple_strtol(buf, NULL, 10);
 461
 462         mutex_lock(&data->update_lock);
 463         data->temp_max_hyst[n] = TEMP_TO_REG(v);
 464         gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 465                           data->temp_max_hyst[n]);
 466         mutex_unlock(&data->update_lock);
 467         return count;
 468 }
 469
 470 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
 471 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
 472 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 473                 get_temp_max, set_temp_max, 0);
 474 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
 475                 get_temp_max, set_temp_max, 1);
 476 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 477                 get_temp_max_hyst, set_temp_max_hyst, 0);
 478 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
 479                 get_temp_max_hyst, set_temp_max_hyst, 1);
 480
 481 static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
 482                           char *buf)
 483 {
 484         struct gl520_data *data = gl520_update_device(dev);
 485         return sprintf(buf, "%d\n", data->alarms);
 486 }
 487
 488 static ssize_t get_beep_enable(struct device *dev, struct device_attribute
 489                                *attr, char *buf)
 490 {
 491         struct gl520_data *data = gl520_update_device(dev);
 492         return sprintf(buf, "%d\n", data->beep_enable);
 493 }
 494
 495 static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
 496                              char *buf)
 497 {
 498         struct gl520_data *data = gl520_update_device(dev);
 499         return sprintf(buf, "%d\n", data->beep_mask);
 500 }
 501
 502 static ssize_t set_beep_enable(struct device *dev, struct device_attribute
 503                                *attr, const char *buf, size_t count)
 504 {
 505         struct i2c_client *client = to_i2c_client(dev);
 506         struct gl520_data *data = i2c_get_clientdata(client);
 507         u8 r = simple_strtoul(buf, NULL, 10)?0:1;
 508
 509         mutex_lock(&data->update_lock);
 510         data->beep_enable = !r;
 511         gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 512                           (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 513                            & ~0x04) | (r << 2));
 514         mutex_unlock(&data->update_lock);
 515         return count;
 516 }
 517
 518 static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
 519                              const char *buf, size_t count)
 520 {
 521         struct i2c_client *client = to_i2c_client(dev);
 522         struct gl520_data *data = i2c_get_clientdata(client);
 523         u8 r = simple_strtoul(buf, NULL, 10);
 524
 525         mutex_lock(&data->update_lock);
 526         r &= data->alarm_mask;
 527         data->beep_mask = r;
 528         gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 529         mutex_unlock(&data->update_lock);
 530         return count;
 531 }
 532
 533 static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 534 static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 535                 get_beep_enable, set_beep_enable);
 536 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 537                 get_beep_mask, set_beep_mask);
 538
 539 static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
 540                          char *buf)
 541 {
 542         int bit_nr = to_sensor_dev_attr(attr)->index;
 543         struct gl520_data *data = gl520_update_device(dev);
 544
 545         return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 546 }
 547
 548 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
 549 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
 550 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
 551 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
 552 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
 553 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
 554 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
 555 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
 556 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
 557
 558 static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
 559                         char *buf)
 560 {
 561         int bitnr = to_sensor_dev_attr(attr)->index;
 562         struct gl520_data *data = gl520_update_device(dev);
 563
 564         return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 565 }
 566
 567 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 568                         const char *buf, size_t count)
 569 {
 570         struct i2c_client *client = to_i2c_client(dev);
 571         struct gl520_data *data = i2c_get_clientdata(client);
 572         int bitnr = to_sensor_dev_attr(attr)->index;
 573         unsigned long bit;
 574
 575         bit = simple_strtoul(buf, NULL, 10);
 576         if (bit & ~1)
 577                 return -EINVAL;
 578
 579         mutex_lock(&data->update_lock);
 580         data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 581         if (bit)
 582                 data->beep_mask |= (1 << bitnr);
 583         else
 584                 data->beep_mask &= ~(1 << bitnr);
 585         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 586         mutex_unlock(&data->update_lock);
 587         return count;
 588 }
 589
 590 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
 591 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
 592 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
 593 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
 594 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
 595 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
 596 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
 597 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 598 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 599
 600 static struct attribute *gl520_attributes[] = {
 601         &dev_attr_cpu0_vid.attr,
 602
 603         &sensor_dev_attr_in0_input.dev_attr.attr,
 604         &sensor_dev_attr_in0_min.dev_attr.attr,
 605         &sensor_dev_attr_in0_max.dev_attr.attr,
 606         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 607         &sensor_dev_attr_in0_beep.dev_attr.attr,
 608         &sensor_dev_attr_in1_input.dev_attr.attr,
 609         &sensor_dev_attr_in1_min.dev_attr.attr,
 610         &sensor_dev_attr_in1_max.dev_attr.attr,
 611         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 612         &sensor_dev_attr_in1_beep.dev_attr.attr,
 613         &sensor_dev_attr_in2_input.dev_attr.attr,
 614         &sensor_dev_attr_in2_min.dev_attr.attr,
 615         &sensor_dev_attr_in2_max.dev_attr.attr,
 616         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 617         &sensor_dev_attr_in2_beep.dev_attr.attr,
 618         &sensor_dev_attr_in3_input.dev_attr.attr,
 619         &sensor_dev_attr_in3_min.dev_attr.attr,
 620         &sensor_dev_attr_in3_max.dev_attr.attr,
 621         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 622         &sensor_dev_attr_in3_beep.dev_attr.attr,
 623
 624         &sensor_dev_attr_fan1_input.dev_attr.attr,
 625         &sensor_dev_attr_fan1_min.dev_attr.attr,
 626         &sensor_dev_attr_fan1_div.dev_attr.attr,
 627         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 628         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 629         &dev_attr_fan1_off.attr,
 630         &sensor_dev_attr_fan2_input.dev_attr.attr,
 631         &sensor_dev_attr_fan2_min.dev_attr.attr,
 632         &sensor_dev_attr_fan2_div.dev_attr.attr,
 633         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 634         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 635
 636         &sensor_dev_attr_temp1_input.dev_attr.attr,
 637         &sensor_dev_attr_temp1_max.dev_attr.attr,
 638         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 639         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 640         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 641
 642         &dev_attr_alarms.attr,
 643         &dev_attr_beep_enable.attr,
 644         &dev_attr_beep_mask.attr,
 645         NULL
 646 };
 647
 648 static const struct attribute_group gl520_group = {
 649         .attrs = gl520_attributes,
 650 };
 651
 652 static struct attribute *gl520_attributes_opt[] = {
 653         &sensor_dev_attr_in4_input.dev_attr.attr,
 654         &sensor_dev_attr_in4_min.dev_attr.attr,
 655         &sensor_dev_attr_in4_max.dev_attr.attr,
 656         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 657         &sensor_dev_attr_in4_beep.dev_attr.attr,
 658
 659         &sensor_dev_attr_temp2_input.dev_attr.attr,
 660         &sensor_dev_attr_temp2_max.dev_attr.attr,
 661         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 662         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 663         &sensor_dev_attr_temp2_beep.dev_attr.attr,
 664         NULL
 665 };
 666
 667 static const struct attribute_group gl520_group_opt = {
 668         .attrs = gl520_attributes_opt,
 669 };
 670
 671
 672 /*
 673  * Real code
 674  */
 675
 676 static int gl520_attach_adapter(struct i2c_adapter *adapter)
 677 {
 678         if (!(adapter->class & I2C_CLASS_HWMON))
 679                 return 0;
 680         return i2c_probe(adapter, &addr_data, gl520_detect);
 681 }
 682
 683 static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
 684 {
 685         struct i2c_client *client;
 686         struct gl520_data *data;
 687         int err = 0;
 688
 689         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 690                                      I2C_FUNC_SMBUS_WORD_DATA))
 691                 goto exit;
 692
 693         /* OK. For now, we presume we have a valid client. We now create the
 694            client structure, even though we cannot fill it completely yet.
 695            But it allows us to access gl520_{read,write}_value. */
 696
 697         if (!(data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL))) {
 698                 err = -ENOMEM;
 699                 goto exit;
 700         }
 701
 702         client = &data->client;
 703         i2c_set_clientdata(client, data);
 704         client->addr = address;
 705         client->adapter = adapter;
 706         client->driver = &gl520_driver;
 707
 708         /* Determine the chip type. */
 709         if (kind < 0) {
 710                 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 711                     ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 712                     ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 713                         dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 714                         goto exit_free;
 715                 }
 716         }
 717
 718         /* Fill in the remaining client fields */
 719         strlcpy(client->name, "gl520sm", I2C_NAME_SIZE);
 720         mutex_init(&data->update_lock);
 721
 722         /* Tell the I2C layer a new client has arrived */
 723         if ((err = i2c_attach_client(client)))
 724                 goto exit_free;
 725
 726         /* Initialize the GL520SM chip */
 727         gl520_init_client(client);
 728
 729         /* Register sysfs hooks */
 730         if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
 731                 goto exit_detach;
 732
 733         if (data->two_temps) {
 734                 if ((err = device_create_file(&client->dev,
 735                                 &sensor_dev_attr_temp2_input.dev_attr))
 736                  || (err = device_create_file(&client->dev,
 737                                 &sensor_dev_attr_temp2_max.dev_attr))
 738                  || (err = device_create_file(&client->dev,
 739                                 &sensor_dev_attr_temp2_max_hyst.dev_attr))
 740                  || (err = device_create_file(&client->dev,
 741                                 &sensor_dev_attr_temp2_alarm.dev_attr))
 742                  || (err = device_create_file(&client->dev,
 743                                 &sensor_dev_attr_temp2_beep.dev_attr)))
 744                         goto exit_remove_files;
 745         } else {
 746                 if ((err = device_create_file(&client->dev,
 747                                 &sensor_dev_attr_in4_input.dev_attr))
 748                  || (err = device_create_file(&client->dev,
 749                                 &sensor_dev_attr_in4_min.dev_attr))
 750                  || (err = device_create_file(&client->dev,
 751                                 &sensor_dev_attr_in4_max.dev_attr))
 752                  || (err = device_create_file(&client->dev,
 753                                 &sensor_dev_attr_in4_alarm.dev_attr))
 754                  || (err = device_create_file(&client->dev,
 755                                 &sensor_dev_attr_in4_beep.dev_attr)))
 756                         goto exit_remove_files;
 757         }
 758
 759
 760         data->hwmon_dev = hwmon_device_register(&client->dev);
 761         if (IS_ERR(data->hwmon_dev)) {
 762                 err = PTR_ERR(data->hwmon_dev);
 763                 goto exit_remove_files;
 764         }
 765
 766         return 0;
 767
 768 exit_remove_files:
 769         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 770         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 771 exit_detach:
 772         i2c_detach_client(client);
 773 exit_free:
 774         kfree(data);
 775 exit:
 776         return err;
 777 }
 778
 779
 780 /* Called when we have found a new GL520SM. */
 781 static void gl520_init_client(struct i2c_client *client)
 782 {
 783         struct gl520_data *data = i2c_get_clientdata(client);
 784         u8 oldconf, conf;
 785
 786         conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 787
 788         data->alarm_mask = 0xff;
 789         data->vrm = vid_which_vrm();
 790
 791         if (extra_sensor_type == 1)
 792                 conf &= ~0x10;
 793         else if (extra_sensor_type == 2)
 794                 conf |= 0x10;
 795         data->two_temps = !(conf & 0x10);
 796
 797         /* If IRQ# is disabled, we can safely force comparator mode */
 798         if (!(conf & 0x20))
 799                 conf &= 0xf7;
 800
 801         /* Enable monitoring if needed */
 802         conf |= 0x40;
 803
 804         if (conf != oldconf)
 805                 gl520_write_value(client, GL520_REG_CONF, conf);
 806
 807         gl520_update_device(&(client->dev));
 808
 809         if (data->fan_min[0] == 0)
 810                 data->alarm_mask &= ~0x20;
 811         if (data->fan_min[1] == 0)
 812                 data->alarm_mask &= ~0x40;
 813
 814         data->beep_mask &= data->alarm_mask;
 815         gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 816 }
 817
 818 static int gl520_detach_client(struct i2c_client *client)
 819 {
 820         struct gl520_data *data = i2c_get_clientdata(client);
 821         int err;
 822
 823         hwmon_device_unregister(data->hwmon_dev);
 824         sysfs_remove_group(&client->dev.kobj, &gl520_group);
 825         sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
 826
 827         if ((err = i2c_detach_client(client)))
 828                 return err;
 829
 830         kfree(data);
 831         return 0;
 832 }
 833
 834
 835 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 836    GL520 uses a high-byte first convention */
 837 static int gl520_read_value(struct i2c_client *client, u8 reg)
 838 {
 839         if ((reg >= 0x07) && (reg <= 0x0c))
 840                 return swab16(i2c_smbus_read_word_data(client, reg));
 841         else
 842                 return i2c_smbus_read_byte_data(client, reg);
 843 }
 844
 845 static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 846 {
 847         if ((reg >= 0x07) && (reg <= 0x0c))
 848                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 849         else
 850                 return i2c_smbus_write_byte_data(client, reg, value);
 851 }
 852
 853
 854 static struct gl520_data *gl520_update_device(struct device *dev)
 855 {
 856         struct i2c_client *client = to_i2c_client(dev);
 857         struct gl520_data *data = i2c_get_clientdata(client);
 858         int val, i;
 859
 860         mutex_lock(&data->update_lock);
 861
 862         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 863
 864                 dev_dbg(&client->dev, "Starting gl520sm update\n");
 865
 866                 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 867                 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 868                 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
 869
 870                 for (i = 0; i < 4; i++) {
 871                         data->in_input[i] = gl520_read_value(client,
 872                                                         GL520_REG_IN_INPUT[i]);
 873                         val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 874                         data->in_min[i] = val & 0xff;
 875                         data->in_max[i] = (val >> 8) & 0xff;
 876                 }
 877
 878                 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 879                 data->fan_input[0] = (val >> 8) & 0xff;
 880                 data->fan_input[1] = val & 0xff;
 881
 882                 val = gl520_read_value(client, GL520_REG_FAN_MIN);
 883                 data->fan_min[0] = (val >> 8) & 0xff;
 884                 data->fan_min[1] = val & 0xff;
 885
 886                 data->temp_input[0] = gl520_read_value(client,
 887                                                 GL520_REG_TEMP_INPUT[0]);
 888                 data->temp_max[0] = gl520_read_value(client,
 889                                                 GL520_REG_TEMP_MAX[0]);
 890                 data->temp_max_hyst[0] = gl520_read_value(client,
 891                                                 GL520_REG_TEMP_MAX_HYST[0]);
 892
 893                 val = gl520_read_value(client, GL520_REG_FAN_DIV);
 894                 data->fan_div[0] = (val >> 6) & 0x03;
 895                 data->fan_div[1] = (val >> 4) & 0x03;
 896                 data->fan_off = (val >> 2) & 0x01;
 897
 898                 data->alarms &= data->alarm_mask;
 899
 900                 val = gl520_read_value(client, GL520_REG_CONF);
 901                 data->beep_enable = !((val >> 2) & 1);
 902
 903                 /* Temp1 and Vin4 are the same input */
 904                 if (data->two_temps) {
 905                         data->temp_input[1] = gl520_read_value(client,
 906                                                 GL520_REG_TEMP_INPUT[1]);
 907                         data->temp_max[1] = gl520_read_value(client,
 908                                                 GL520_REG_TEMP_MAX[1]);
 909                         data->temp_max_hyst[1] = gl520_read_value(client,
 910                                                 GL520_REG_TEMP_MAX_HYST[1]);
 911                 } else {
 912                         data->in_input[4] = gl520_read_value(client,
 913                                                 GL520_REG_IN_INPUT[4]);
 914                         data->in_min[4] = gl520_read_value(client,
 915                                                 GL520_REG_IN_MIN[4]);
 916                         data->in_max[4] = gl520_read_value(client,
 917                                                 GL520_REG_IN_MAX[4]);
 918                 }
 919
 920                 data->last_updated = jiffies;
 921                 data->valid = 1;
 922         }
 923
 924         mutex_unlock(&data->update_lock);
 925
 926         return data;
 927 }
 928
 929
 930 static int __init sensors_gl520sm_init(void)
 931 {
 932         return i2c_add_driver(&gl520_driver);
 933 }
 934
 935 static void __exit sensors_gl520sm_exit(void)
 936 {
 937         i2c_del_driver(&gl520_driver);
 938 }
 939
 940
 941 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 942         "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 943         "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 944 MODULE_DESCRIPTION("GL520SM driver");
 945 MODULE_LICENSE("GPL");
 946
 947 module_init(sensors_gl520sm_init);
 948 module_exit(sensors_gl520sm_exit);