drivers/hwmon/gl518sm.c

   1 /*
   2  * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *             monitoring
   4  * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
   5  * Kyosti Malkki <kmalkki@cc.hut.fi>
   6  * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and
   7  * Jean Delvare <khali@linux-fr.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
  24  * and advice of Greg Kroah-Hartman.
  25  *
  26  * Notes about the port:
  27  * Release 0x00 of the GL518SM chipset doesn't support reading of in0,
  28  * in1 nor in2. The original driver had an ugly workaround to get them
  29  * anyway (changing limits and watching alarms trigger and wear off).
  30  * We did not keep that part of the original driver in the Linux 2.6
  31  * version, since it was making the driver significantly more complex
  32  * with no real benefit.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/slab.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/i2c.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/hwmon-sysfs.h>
  42 #include <linux/err.h>
  43 #include <linux/mutex.h>
  44 #include <linux/sysfs.h>
  45
  46 /* Addresses to scan */
  47 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  48
  49 enum chips { gl518sm_r00, gl518sm_r80 };
  50
  51 /* Many GL518 constants specified below */
  52
  53 /* The GL518 registers */
  54 #define GL518_REG_CHIP_ID       0x00
  55 #define GL518_REG_REVISION      0x01
  56 #define GL518_REG_VENDOR_ID     0x02
  57 #define GL518_REG_CONF          0x03
  58 #define GL518_REG_TEMP_IN       0x04
  59 #define GL518_REG_TEMP_MAX      0x05
  60 #define GL518_REG_TEMP_HYST     0x06
  61 #define GL518_REG_FAN_COUNT     0x07
  62 #define GL518_REG_FAN_LIMIT     0x08
  63 #define GL518_REG_VIN1_LIMIT    0x09
  64 #define GL518_REG_VIN2_LIMIT    0x0a
  65 #define GL518_REG_VIN3_LIMIT    0x0b
  66 #define GL518_REG_VDD_LIMIT     0x0c
  67 #define GL518_REG_VIN3          0x0d
  68 #define GL518_REG_MISC          0x0f
  69 #define GL518_REG_ALARM         0x10
  70 #define GL518_REG_MASK          0x11
  71 #define GL518_REG_INT           0x12
  72 #define GL518_REG_VIN2          0x13
  73 #define GL518_REG_VIN1          0x14
  74 #define GL518_REG_VDD           0x15
  75
  76
  77 /*
  78  * Conversions. Rounding and limit checking is only done on the TO_REG
  79  * variants. Note that you should be a bit careful with which arguments
  80  * these macros are called: arguments may be evaluated more than once.
  81  * Fixing this is just not worth it.
  82  */
  83
  84 #define RAW_FROM_REG(val)       val
  85
  86 #define BOOL_FROM_REG(val)      ((val)?0:1)
  87 #define BOOL_TO_REG(val)        ((val)?0:1)
  88
  89 #define TEMP_TO_REG(val)        (SENSORS_LIMIT(((((val)<0? \
  90                                 (val)-500:(val)+500)/1000)+119),0,255))
  91 #define TEMP_FROM_REG(val)      (((val) - 119) * 1000)
  92
  93 static inline u8 FAN_TO_REG(long rpm, int div)
  94 {
  95         long rpmdiv;
  96         if (rpm == 0)
  97                 return 0;
  98         rpmdiv = SENSORS_LIMIT(rpm, 1, 960000) * div;
  99         return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
 100 }
 101 #define FAN_FROM_REG(val,div)   ((val)==0 ? 0 : (480000/((val)*(div))))
 102
 103 #define IN_TO_REG(val)          (SENSORS_LIMIT((((val)+9)/19),0,255))
 104 #define IN_FROM_REG(val)        ((val)*19)
 105
 106 #define VDD_TO_REG(val)         (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 107 #define VDD_FROM_REG(val)       (((val)*95+2)/4)
 108
 109 #define DIV_FROM_REG(val)       (1 << (val))
 110
 111 #define BEEP_MASK_TO_REG(val)   ((val) & 0x7f & data->alarm_mask)
 112 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
 113
 114 /* Each client has this additional data */
 115 struct gl518_data {
 116         struct device *hwmon_dev;
 117         enum chips type;
 118
 119         struct mutex update_lock;
 120         char valid;             /* !=0 if following fields are valid */
 121         unsigned long last_updated;     /* In jiffies */
 122
 123         u8 voltage_in[4];       /* Register values; [0] = VDD */
 124         u8 voltage_min[4];      /* Register values; [0] = VDD */
 125         u8 voltage_max[4];      /* Register values; [0] = VDD */
 126         u8 fan_in[2];
 127         u8 fan_min[2];
 128         u8 fan_div[2];          /* Register encoding, shifted right */
 129         u8 fan_auto1;           /* Boolean */
 130         u8 temp_in;             /* Register values */
 131         u8 temp_max;            /* Register values */
 132         u8 temp_hyst;           /* Register values */
 133         u8 alarms;              /* Register value */
 134         u8 alarm_mask;
 135         u8 beep_mask;           /* Register value */
 136         u8 beep_enable;         /* Boolean */
 137 };
 138
 139 static int gl518_probe(struct i2c_client *client,
 140                        const struct i2c_device_id *id);
 141 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info);
 142 static void gl518_init_client(struct i2c_client *client);
 143 static int gl518_remove(struct i2c_client *client);
 144 static int gl518_read_value(struct i2c_client *client, u8 reg);
 145 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
 146 static struct gl518_data *gl518_update_device(struct device *dev);
 147
 148 static const struct i2c_device_id gl518_id[] = {
 149         { "gl518sm", 0 },
 150         { }
 151 };
 152 MODULE_DEVICE_TABLE(i2c, gl518_id);
 153
 154 /* This is the driver that will be inserted */
 155 static struct i2c_driver gl518_driver = {
 156         .class          = I2C_CLASS_HWMON,
 157         .driver = {
 158                 .name   = "gl518sm",
 159         },
 160         .probe          = gl518_probe,
 161         .remove         = gl518_remove,
 162         .id_table       = gl518_id,
 163         .detect         = gl518_detect,
 164         .address_list   = normal_i2c,
 165 };
 166
 167 /*
 168  * Sysfs stuff
 169  */
 170
 171 #define show(type, suffix, value)                                       \
 172 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)              \
 173 {                                                                       \
 174         struct gl518_data *data = gl518_update_device(dev);             \
 175         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
 176 }
 177
 178 show(TEMP, temp_input1, temp_in);
 179 show(TEMP, temp_max1, temp_max);
 180 show(TEMP, temp_hyst1, temp_hyst);
 181 show(BOOL, fan_auto1, fan_auto1);
 182 show(VDD, in_input0, voltage_in[0]);
 183 show(IN, in_input1, voltage_in[1]);
 184 show(IN, in_input2, voltage_in[2]);
 185 show(IN, in_input3, voltage_in[3]);
 186 show(VDD, in_min0, voltage_min[0]);
 187 show(IN, in_min1, voltage_min[1]);
 188 show(IN, in_min2, voltage_min[2]);
 189 show(IN, in_min3, voltage_min[3]);
 190 show(VDD, in_max0, voltage_max[0]);
 191 show(IN, in_max1, voltage_max[1]);
 192 show(IN, in_max2, voltage_max[2]);
 193 show(IN, in_max3, voltage_max[3]);
 194 show(RAW, alarms, alarms);
 195 show(BOOL, beep_enable, beep_enable);
 196 show(BEEP_MASK, beep_mask, beep_mask);
 197
 198 static ssize_t show_fan_input(struct device *dev,
 199                               struct device_attribute *attr, char *buf)
 200 {
 201         int nr = to_sensor_dev_attr(attr)->index;
 202         struct gl518_data *data = gl518_update_device(dev);
 203         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
 204                                         DIV_FROM_REG(data->fan_div[nr])));
 205 }
 206
 207 static ssize_t show_fan_min(struct device *dev,
 208                             struct device_attribute *attr, char *buf)
 209 {
 210         int nr = to_sensor_dev_attr(attr)->index;
 211         struct gl518_data *data = gl518_update_device(dev);
 212         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 213                                         DIV_FROM_REG(data->fan_div[nr])));
 214 }
 215
 216 static ssize_t show_fan_div(struct device *dev,
 217                             struct device_attribute *attr, char *buf)
 218 {
 219         int nr = to_sensor_dev_attr(attr)->index;
 220         struct gl518_data *data = gl518_update_device(dev);
 221         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 222 }
 223
 224 #define set(type, suffix, value, reg)                                   \
 225 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 226         size_t count)                                                   \
 227 {                                                                       \
 228         struct i2c_client *client = to_i2c_client(dev);                 \
 229         struct gl518_data *data = i2c_get_clientdata(client);           \
 230         long val = simple_strtol(buf, NULL, 10);                        \
 231                                                                         \
 232         mutex_lock(&data->update_lock);                                 \
 233         data->value = type##_TO_REG(val);                               \
 234         gl518_write_value(client, reg, data->value);                    \
 235         mutex_unlock(&data->update_lock);                               \
 236         return count;                                                   \
 237 }
 238
 239 #define set_bits(type, suffix, value, reg, mask, shift)                 \
 240 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 241         size_t count)                                                   \
 242 {                                                                       \
 243         struct i2c_client *client = to_i2c_client(dev);                 \
 244         struct gl518_data *data = i2c_get_clientdata(client);           \
 245         int regvalue;                                                   \
 246         unsigned long val = simple_strtoul(buf, NULL, 10);              \
 247                                                                         \
 248         mutex_lock(&data->update_lock);                                 \
 249         regvalue = gl518_read_value(client, reg);                       \
 250         data->value = type##_TO_REG(val);                               \
 251         regvalue = (regvalue & ~mask) | (data->value << shift);         \
 252         gl518_write_value(client, reg, regvalue);                       \
 253         mutex_unlock(&data->update_lock);                               \
 254         return count;                                                   \
 255 }
 256
 257 #define set_low(type, suffix, value, reg)                               \
 258         set_bits(type, suffix, value, reg, 0x00ff, 0)
 259 #define set_high(type, suffix, value, reg)                              \
 260         set_bits(type, suffix, value, reg, 0xff00, 8)
 261
 262 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
 263 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
 264 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
 265 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
 266 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
 267 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
 268 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
 269 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
 270 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
 271 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
 272 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
 273 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
 274 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
 275
 276 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 277                            const char *buf, size_t count)
 278 {
 279         struct i2c_client *client = to_i2c_client(dev);
 280         struct gl518_data *data = i2c_get_clientdata(client);
 281         int nr = to_sensor_dev_attr(attr)->index;
 282         int regvalue;
 283         unsigned long val = simple_strtoul(buf, NULL, 10);
 284
 285         mutex_lock(&data->update_lock);
 286         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 287         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 288         regvalue = (regvalue & (0xff << (8 * nr)))
 289                  | (data->fan_min[nr] << (8 * (1 - nr)));
 290         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
 291
 292         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 293         if (data->fan_min[nr] == 0)
 294                 data->alarm_mask &= ~(0x20 << nr);
 295         else
 296                 data->alarm_mask |= (0x20 << nr);
 297         data->beep_mask &= data->alarm_mask;
 298         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 299
 300         mutex_unlock(&data->update_lock);
 301         return count;
 302 }
 303
 304 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 305                            const char *buf, size_t count)
 306 {
 307         struct i2c_client *client = to_i2c_client(dev);
 308         struct gl518_data *data = i2c_get_clientdata(client);
 309         int nr = to_sensor_dev_attr(attr)->index;
 310         int regvalue;
 311         unsigned long val = simple_strtoul(buf, NULL, 10);
 312
 313         switch (val) {
 314         case 1: val = 0; break;
 315         case 2: val = 1; break;
 316         case 4: val = 2; break;
 317         case 8: val = 3; break;
 318         default:
 319                 dev_err(dev, "Invalid fan clock divider %lu, choose one "
 320                         "of 1, 2, 4 or 8\n", val);
 321                 return -EINVAL;
 322         }
 323
 324         mutex_lock(&data->update_lock);
 325         regvalue = gl518_read_value(client, GL518_REG_MISC);
 326         data->fan_div[nr] = val;
 327         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
 328                  | (data->fan_div[nr] << (6 - 2 * nr));
 329         gl518_write_value(client, GL518_REG_MISC, regvalue);
 330         mutex_unlock(&data->update_lock);
 331         return count;
 332 }
 333
 334 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
 335 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
 336 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
 337         show_temp_hyst1, set_temp_hyst1);
 338 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
 339 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
 340 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
 341 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
 342         show_fan_min, set_fan_min, 0);
 343 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
 344         show_fan_min, set_fan_min, 1);
 345 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
 346         show_fan_div, set_fan_div, 0);
 347 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
 348         show_fan_div, set_fan_div, 1);
 349 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
 350 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
 351 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
 352 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
 353 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
 354 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
 355 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
 356 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
 357 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
 358 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
 359 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
 360 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
 361 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 362 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
 363         show_beep_enable, set_beep_enable);
 364 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
 365         show_beep_mask, set_beep_mask);
 366
 367 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 368                           char *buf)
 369 {
 370         int bitnr = to_sensor_dev_attr(attr)->index;
 371         struct gl518_data *data = gl518_update_device(dev);
 372         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 373 }
 374
 375 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 376 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 377 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 378 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 379 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 380 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
 381 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
 382
 383 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 384                           char *buf)
 385 {
 386         int bitnr = to_sensor_dev_attr(attr)->index;
 387         struct gl518_data *data = gl518_update_device(dev);
 388         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 389 }
 390
 391 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 392                         const char *buf, size_t count)
 393 {
 394         struct i2c_client *client = to_i2c_client(dev);
 395         struct gl518_data *data = i2c_get_clientdata(client);
 396         int bitnr = to_sensor_dev_attr(attr)->index;
 397         unsigned long bit;
 398
 399         bit = simple_strtoul(buf, NULL, 10);
 400         if (bit & ~1)
 401                 return -EINVAL;
 402
 403         mutex_lock(&data->update_lock);
 404         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 405         if (bit)
 406                 data->beep_mask |= (1 << bitnr);
 407         else
 408                 data->beep_mask &= ~(1 << bitnr);
 409         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 410         mutex_unlock(&data->update_lock);
 411         return count;
 412 }
 413
 414 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
 415 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
 416 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
 417 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
 418 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
 419 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
 420 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
 421
 422 static struct attribute *gl518_attributes[] = {
 423         &dev_attr_in3_input.attr,
 424         &dev_attr_in0_min.attr,
 425         &dev_attr_in1_min.attr,
 426         &dev_attr_in2_min.attr,
 427         &dev_attr_in3_min.attr,
 428         &dev_attr_in0_max.attr,
 429         &dev_attr_in1_max.attr,
 430         &dev_attr_in2_max.attr,
 431         &dev_attr_in3_max.attr,
 432         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 433         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 434         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 435         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 436         &sensor_dev_attr_in0_beep.dev_attr.attr,
 437         &sensor_dev_attr_in1_beep.dev_attr.attr,
 438         &sensor_dev_attr_in2_beep.dev_attr.attr,
 439         &sensor_dev_attr_in3_beep.dev_attr.attr,
 440
 441         &dev_attr_fan1_auto.attr,
 442         &sensor_dev_attr_fan1_input.dev_attr.attr,
 443         &sensor_dev_attr_fan2_input.dev_attr.attr,
 444         &sensor_dev_attr_fan1_min.dev_attr.attr,
 445         &sensor_dev_attr_fan2_min.dev_attr.attr,
 446         &sensor_dev_attr_fan1_div.dev_attr.attr,
 447         &sensor_dev_attr_fan2_div.dev_attr.attr,
 448         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 449         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 450         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 451         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 452
 453         &dev_attr_temp1_input.attr,
 454         &dev_attr_temp1_max.attr,
 455         &dev_attr_temp1_max_hyst.attr,
 456         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 457         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 458
 459         &dev_attr_alarms.attr,
 460         &dev_attr_beep_enable.attr,
 461         &dev_attr_beep_mask.attr,
 462         NULL
 463 };
 464
 465 static const struct attribute_group gl518_group = {
 466         .attrs = gl518_attributes,
 467 };
 468
 469 static struct attribute *gl518_attributes_r80[] = {
 470         &dev_attr_in0_input.attr,
 471         &dev_attr_in1_input.attr,
 472         &dev_attr_in2_input.attr,
 473         NULL
 474 };
 475
 476 static const struct attribute_group gl518_group_r80 = {
 477         .attrs = gl518_attributes_r80,
 478 };
 479
 480 /*
 481  * Real code
 482  */
 483
 484 /* Return 0 if detection is successful, -ENODEV otherwise */
 485 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
 486 {
 487         struct i2c_adapter *adapter = client->adapter;
 488         int rev;
 489
 490         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 491                                      I2C_FUNC_SMBUS_WORD_DATA))
 492                 return -ENODEV;
 493
 494         /* Now, we do the remaining detection. */
 495         if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
 496          || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
 497                 return -ENODEV;
 498
 499         /* Determine the chip type. */
 500         rev = gl518_read_value(client, GL518_REG_REVISION);
 501         if (rev != 0x00 && rev != 0x80)
 502                 return -ENODEV;
 503
 504         strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
 505
 506         return 0;
 507 }
 508
 509 static int gl518_probe(struct i2c_client *client,
 510                        const struct i2c_device_id *id)
 511 {
 512         struct gl518_data *data;
 513         int err, revision;
 514
 515         data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL);
 516         if (!data) {
 517                 err = -ENOMEM;
 518                 goto exit;
 519         }
 520
 521         i2c_set_clientdata(client, data);
 522         revision = gl518_read_value(client, GL518_REG_REVISION);
 523         data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
 524         mutex_init(&data->update_lock);
 525
 526         /* Initialize the GL518SM chip */
 527         data->alarm_mask = 0xff;
 528         gl518_init_client(client);
 529
 530         /* Register sysfs hooks */
 531         if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
 532                 goto exit_free;
 533         if (data->type == gl518sm_r80)
 534                 if ((err = sysfs_create_group(&client->dev.kobj,
 535                                               &gl518_group_r80)))
 536                         goto exit_remove_files;
 537
 538         data->hwmon_dev = hwmon_device_register(&client->dev);
 539         if (IS_ERR(data->hwmon_dev)) {
 540                 err = PTR_ERR(data->hwmon_dev);
 541                 goto exit_remove_files;
 542         }
 543
 544         return 0;
 545
 546 exit_remove_files:
 547         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 548         if (data->type == gl518sm_r80)
 549                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 550 exit_free:
 551         kfree(data);
 552 exit:
 553         return err;
 554 }
 555
 556
 557 /* Called when we have found a new GL518SM.
 558    Note that we preserve D4:NoFan2 and D2:beep_enable. */
 559 static void gl518_init_client(struct i2c_client *client)
 560 {
 561         /* Make sure we leave D7:Reset untouched */
 562         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
 563
 564         /* Comparator mode (D3=0), standby mode (D6=0) */
 565         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
 566
 567         /* Never interrupts */
 568         gl518_write_value(client, GL518_REG_MASK, 0x00);
 569
 570         /* Clear status register (D5=1), start (D6=1) */
 571         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
 572         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
 573 }
 574
 575 static int gl518_remove(struct i2c_client *client)
 576 {
 577         struct gl518_data *data = i2c_get_clientdata(client);
 578
 579         hwmon_device_unregister(data->hwmon_dev);
 580         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 581         if (data->type == gl518sm_r80)
 582                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 583
 584         kfree(data);
 585         return 0;
 586 }
 587
 588 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 589    GL518 uses a high-byte first convention, which is exactly opposite to
 590    the SMBus standard. */
 591 static int gl518_read_value(struct i2c_client *client, u8 reg)
 592 {
 593         if ((reg >= 0x07) && (reg <= 0x0c))
 594                 return swab16(i2c_smbus_read_word_data(client, reg));
 595         else
 596                 return i2c_smbus_read_byte_data(client, reg);
 597 }
 598
 599 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
 600 {
 601         if ((reg >= 0x07) && (reg <= 0x0c))
 602                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 603         else
 604                 return i2c_smbus_write_byte_data(client, reg, value);
 605 }
 606
 607 static struct gl518_data *gl518_update_device(struct device *dev)
 608 {
 609         struct i2c_client *client = to_i2c_client(dev);
 610         struct gl518_data *data = i2c_get_clientdata(client);
 611         int val;
 612
 613         mutex_lock(&data->update_lock);
 614
 615         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 616             || !data->valid) {
 617                 dev_dbg(&client->dev, "Starting gl518 update\n");
 618
 619                 data->alarms = gl518_read_value(client, GL518_REG_INT);
 620                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 621
 622                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
 623                 data->voltage_min[0] = val & 0xff;
 624                 data->voltage_max[0] = (val >> 8) & 0xff;
 625                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
 626                 data->voltage_min[1] = val & 0xff;
 627                 data->voltage_max[1] = (val >> 8) & 0xff;
 628                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
 629                 data->voltage_min[2] = val & 0xff;
 630                 data->voltage_max[2] = (val >> 8) & 0xff;
 631                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
 632                 data->voltage_min[3] = val & 0xff;
 633                 data->voltage_max[3] = (val >> 8) & 0xff;
 634
 635                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
 636                 data->fan_in[0] = (val >> 8) & 0xff;
 637                 data->fan_in[1] = val & 0xff;
 638
 639                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 640                 data->fan_min[0] = (val >> 8) & 0xff;
 641                 data->fan_min[1] = val & 0xff;
 642
 643                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
 644                 data->temp_max =
 645                     gl518_read_value(client, GL518_REG_TEMP_MAX);
 646                 data->temp_hyst =
 647                     gl518_read_value(client, GL518_REG_TEMP_HYST);
 648
 649                 val = gl518_read_value(client, GL518_REG_MISC);
 650                 data->fan_div[0] = (val >> 6) & 0x03;
 651                 data->fan_div[1] = (val >> 4) & 0x03;
 652                 data->fan_auto1  = (val >> 3) & 0x01;
 653
 654                 data->alarms &= data->alarm_mask;
 655
 656                 val = gl518_read_value(client, GL518_REG_CONF);
 657                 data->beep_enable = (val >> 2) & 1;
 658
 659                 if (data->type != gl518sm_r00) {
 660                         data->voltage_in[0] =
 661                             gl518_read_value(client, GL518_REG_VDD);
 662                         data->voltage_in[1] =
 663                             gl518_read_value(client, GL518_REG_VIN1);
 664                         data->voltage_in[2] =
 665                             gl518_read_value(client, GL518_REG_VIN2);
 666                 }
 667                 data->voltage_in[3] =
 668                     gl518_read_value(client, GL518_REG_VIN3);
 669
 670                 data->last_updated = jiffies;
 671                 data->valid = 1;
 672         }
 673
 674         mutex_unlock(&data->update_lock);
 675
 676         return data;
 677 }
 678
 679 static int __init sensors_gl518sm_init(void)
 680 {
 681         return i2c_add_driver(&gl518_driver);
 682 }
 683
 684 static void __exit sensors_gl518sm_exit(void)
 685 {
 686         i2c_del_driver(&gl518_driver);
 687 }
 688
 689 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 690         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
 691         "Hong-Gunn Chew <hglinux@gunnet.org>");
 692 MODULE_DESCRIPTION("GL518SM driver");
 693 MODULE_LICENSE("GPL");
 694
 695 module_init(sensors_gl518sm_init);
 696 module_exit(sensors_gl518sm_exit);