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 unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  48
  49 /* Insmod parameters */
  50 I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80);
  51
  52 /* Many GL518 constants specified below */
  53
  54 /* The GL518 registers */
  55 #define GL518_REG_CHIP_ID       0x00
  56 #define GL518_REG_REVISION      0x01
  57 #define GL518_REG_VENDOR_ID     0x02
  58 #define GL518_REG_CONF          0x03
  59 #define GL518_REG_TEMP_IN       0x04
  60 #define GL518_REG_TEMP_MAX      0x05
  61 #define GL518_REG_TEMP_HYST     0x06
  62 #define GL518_REG_FAN_COUNT     0x07
  63 #define GL518_REG_FAN_LIMIT     0x08
  64 #define GL518_REG_VIN1_LIMIT    0x09
  65 #define GL518_REG_VIN2_LIMIT    0x0a
  66 #define GL518_REG_VIN3_LIMIT    0x0b
  67 #define GL518_REG_VDD_LIMIT     0x0c
  68 #define GL518_REG_VIN3          0x0d
  69 #define GL518_REG_MISC          0x0f
  70 #define GL518_REG_ALARM         0x10
  71 #define GL518_REG_MASK          0x11
  72 #define GL518_REG_INT           0x12
  73 #define GL518_REG_VIN2          0x13
  74 #define GL518_REG_VIN1          0x14
  75 #define GL518_REG_VDD           0x15
  76
  77
  78 /*
  79  * Conversions. Rounding and limit checking is only done on the TO_REG
  80  * variants. Note that you should be a bit careful with which arguments
  81  * these macros are called: arguments may be evaluated more than once.
  82  * Fixing this is just not worth it.
  83  */
  84
  85 #define RAW_FROM_REG(val)       val
  86
  87 #define BOOL_FROM_REG(val)      ((val)?0:1)
  88 #define BOOL_TO_REG(val)        ((val)?0:1)
  89
  90 #define TEMP_TO_REG(val)        (SENSORS_LIMIT(((((val)<0? \
  91                                 (val)-500:(val)+500)/1000)+119),0,255))
  92 #define TEMP_FROM_REG(val)      (((val) - 119) * 1000)
  93
  94 static inline u8 FAN_TO_REG(long rpm, int div)
  95 {
  96         long rpmdiv;
  97         if (rpm == 0)
  98                 return 0;
  99         rpmdiv = SENSORS_LIMIT(rpm, 1, 960000) * div;
 100         return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
 101 }
 102 #define FAN_FROM_REG(val,div)   ((val)==0 ? 0 : (480000/((val)*(div))))
 103
 104 #define IN_TO_REG(val)          (SENSORS_LIMIT((((val)+9)/19),0,255))
 105 #define IN_FROM_REG(val)        ((val)*19)
 106
 107 #define VDD_TO_REG(val)         (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 108 #define VDD_FROM_REG(val)       (((val)*95+2)/4)
 109
 110 #define DIV_FROM_REG(val)       (1 << (val))
 111
 112 #define BEEP_MASK_TO_REG(val)   ((val) & 0x7f & data->alarm_mask)
 113 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
 114
 115 /* Each client has this additional data */
 116 struct gl518_data {
 117         struct i2c_client client;
 118         struct device *hwmon_dev;
 119         enum chips type;
 120
 121         struct mutex update_lock;
 122         char valid;             /* !=0 if following fields are valid */
 123         unsigned long last_updated;     /* In jiffies */
 124
 125         u8 voltage_in[4];       /* Register values; [0] = VDD */
 126         u8 voltage_min[4];      /* Register values; [0] = VDD */
 127         u8 voltage_max[4];      /* Register values; [0] = VDD */
 128         u8 fan_in[2];
 129         u8 fan_min[2];
 130         u8 fan_div[2];          /* Register encoding, shifted right */
 131         u8 fan_auto1;           /* Boolean */
 132         u8 temp_in;             /* Register values */
 133         u8 temp_max;            /* Register values */
 134         u8 temp_hyst;           /* Register values */
 135         u8 alarms;              /* Register value */
 136         u8 alarm_mask;
 137         u8 beep_mask;           /* Register value */
 138         u8 beep_enable;         /* Boolean */
 139 };
 140
 141 static int gl518_attach_adapter(struct i2c_adapter *adapter);
 142 static int gl518_detect(struct i2c_adapter *adapter, int address, int kind);
 143 static void gl518_init_client(struct i2c_client *client);
 144 static int gl518_detach_client(struct i2c_client *client);
 145 static int gl518_read_value(struct i2c_client *client, u8 reg);
 146 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
 147 static struct gl518_data *gl518_update_device(struct device *dev);
 148
 149 /* This is the driver that will be inserted */
 150 static struct i2c_driver gl518_driver = {
 151         .driver = {
 152                 .name   = "gl518sm",
 153         },
 154         .attach_adapter = gl518_attach_adapter,
 155         .detach_client  = gl518_detach_client,
 156 };
 157
 158 /*
 159  * Sysfs stuff
 160  */
 161
 162 #define show(type, suffix, value)                                       \
 163 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)              \
 164 {                                                                       \
 165         struct gl518_data *data = gl518_update_device(dev);             \
 166         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
 167 }
 168
 169 show(TEMP, temp_input1, temp_in);
 170 show(TEMP, temp_max1, temp_max);
 171 show(TEMP, temp_hyst1, temp_hyst);
 172 show(BOOL, fan_auto1, fan_auto1);
 173 show(VDD, in_input0, voltage_in[0]);
 174 show(IN, in_input1, voltage_in[1]);
 175 show(IN, in_input2, voltage_in[2]);
 176 show(IN, in_input3, voltage_in[3]);
 177 show(VDD, in_min0, voltage_min[0]);
 178 show(IN, in_min1, voltage_min[1]);
 179 show(IN, in_min2, voltage_min[2]);
 180 show(IN, in_min3, voltage_min[3]);
 181 show(VDD, in_max0, voltage_max[0]);
 182 show(IN, in_max1, voltage_max[1]);
 183 show(IN, in_max2, voltage_max[2]);
 184 show(IN, in_max3, voltage_max[3]);
 185 show(RAW, alarms, alarms);
 186 show(BOOL, beep_enable, beep_enable);
 187 show(BEEP_MASK, beep_mask, beep_mask);
 188
 189 static ssize_t show_fan_input(struct device *dev,
 190                               struct device_attribute *attr, char *buf)
 191 {
 192         int nr = to_sensor_dev_attr(attr)->index;
 193         struct gl518_data *data = gl518_update_device(dev);
 194         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
 195                                         DIV_FROM_REG(data->fan_div[nr])));
 196 }
 197
 198 static ssize_t show_fan_min(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_min[nr],
 204                                         DIV_FROM_REG(data->fan_div[nr])));
 205 }
 206
 207 static ssize_t show_fan_div(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", DIV_FROM_REG(data->fan_div[nr]));
 213 }
 214
 215 #define set(type, suffix, value, reg)                                   \
 216 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 217         size_t count)                                                   \
 218 {                                                                       \
 219         struct i2c_client *client = to_i2c_client(dev);                 \
 220         struct gl518_data *data = i2c_get_clientdata(client);           \
 221         long val = simple_strtol(buf, NULL, 10);                        \
 222                                                                         \
 223         mutex_lock(&data->update_lock);                                 \
 224         data->value = type##_TO_REG(val);                               \
 225         gl518_write_value(client, reg, data->value);                    \
 226         mutex_unlock(&data->update_lock);                               \
 227         return count;                                                   \
 228 }
 229
 230 #define set_bits(type, suffix, value, reg, mask, shift)                 \
 231 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 232         size_t count)                                                   \
 233 {                                                                       \
 234         struct i2c_client *client = to_i2c_client(dev);                 \
 235         struct gl518_data *data = i2c_get_clientdata(client);           \
 236         int regvalue;                                                   \
 237         unsigned long val = simple_strtoul(buf, NULL, 10);              \
 238                                                                         \
 239         mutex_lock(&data->update_lock);                                 \
 240         regvalue = gl518_read_value(client, reg);                       \
 241         data->value = type##_TO_REG(val);                               \
 242         regvalue = (regvalue & ~mask) | (data->value << shift);         \
 243         gl518_write_value(client, reg, regvalue);                       \
 244         mutex_unlock(&data->update_lock);                               \
 245         return count;                                                   \
 246 }
 247
 248 #define set_low(type, suffix, value, reg)                               \
 249         set_bits(type, suffix, value, reg, 0x00ff, 0)
 250 #define set_high(type, suffix, value, reg)                              \
 251         set_bits(type, suffix, value, reg, 0xff00, 8)
 252
 253 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
 254 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
 255 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
 256 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
 257 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
 258 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
 259 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
 260 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
 261 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
 262 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
 263 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
 264 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
 265 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
 266
 267 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 268                            const char *buf, size_t count)
 269 {
 270         struct i2c_client *client = to_i2c_client(dev);
 271         struct gl518_data *data = i2c_get_clientdata(client);
 272         int nr = to_sensor_dev_attr(attr)->index;
 273         int regvalue;
 274         unsigned long val = simple_strtoul(buf, NULL, 10);
 275
 276         mutex_lock(&data->update_lock);
 277         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 278         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 279         regvalue = (regvalue & (0xff << (8 * nr)))
 280                  | (data->fan_min[nr] << (8 * (1 - nr)));
 281         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
 282
 283         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 284         if (data->fan_min[nr] == 0)
 285                 data->alarm_mask &= ~(0x20 << nr);
 286         else
 287                 data->alarm_mask |= (0x20 << nr);
 288         data->beep_mask &= data->alarm_mask;
 289         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 290
 291         mutex_unlock(&data->update_lock);
 292         return count;
 293 }
 294
 295 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 296                            const char *buf, size_t count)
 297 {
 298         struct i2c_client *client = to_i2c_client(dev);
 299         struct gl518_data *data = i2c_get_clientdata(client);
 300         int nr = to_sensor_dev_attr(attr)->index;
 301         int regvalue;
 302         unsigned long val = simple_strtoul(buf, NULL, 10);
 303
 304         switch (val) {
 305         case 1: val = 0; break;
 306         case 2: val = 1; break;
 307         case 4: val = 2; break;
 308         case 8: val = 3; break;
 309         default:
 310                 dev_err(dev, "Invalid fan clock divider %lu, choose one "
 311                         "of 1, 2, 4 or 8\n", val);
 312                 return -EINVAL;
 313         }
 314
 315         mutex_lock(&data->update_lock);
 316         regvalue = gl518_read_value(client, GL518_REG_MISC);
 317         data->fan_div[nr] = val;
 318         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
 319                  | (data->fan_div[nr] << (6 - 2 * nr));
 320         gl518_write_value(client, GL518_REG_MISC, regvalue);
 321         mutex_unlock(&data->update_lock);
 322         return count;
 323 }
 324
 325 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
 326 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
 327 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
 328         show_temp_hyst1, set_temp_hyst1);
 329 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
 330 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
 331 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
 332 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
 333         show_fan_min, set_fan_min, 0);
 334 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
 335         show_fan_min, set_fan_min, 1);
 336 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
 337         show_fan_div, set_fan_div, 0);
 338 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
 339         show_fan_div, set_fan_div, 1);
 340 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
 341 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
 342 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
 343 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
 344 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
 345 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
 346 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
 347 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
 348 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
 349 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
 350 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
 351 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
 352 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 353 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
 354         show_beep_enable, set_beep_enable);
 355 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
 356         show_beep_mask, set_beep_mask);
 357
 358 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 359                           char *buf)
 360 {
 361         int bitnr = to_sensor_dev_attr(attr)->index;
 362         struct gl518_data *data = gl518_update_device(dev);
 363         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 364 }
 365
 366 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 367 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 368 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 369 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 370 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 371 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
 372 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
 373
 374 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 375                           char *buf)
 376 {
 377         int bitnr = to_sensor_dev_attr(attr)->index;
 378         struct gl518_data *data = gl518_update_device(dev);
 379         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 380 }
 381
 382 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 383                         const char *buf, size_t count)
 384 {
 385         struct i2c_client *client = to_i2c_client(dev);
 386         struct gl518_data *data = i2c_get_clientdata(client);
 387         int bitnr = to_sensor_dev_attr(attr)->index;
 388         unsigned long bit;
 389
 390         bit = simple_strtoul(buf, NULL, 10);
 391         if (bit & ~1)
 392                 return -EINVAL;
 393
 394         mutex_lock(&data->update_lock);
 395         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 396         if (bit)
 397                 data->beep_mask |= (1 << bitnr);
 398         else
 399                 data->beep_mask &= ~(1 << bitnr);
 400         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 401         mutex_unlock(&data->update_lock);
 402         return count;
 403 }
 404
 405 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
 406 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
 407 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
 408 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
 409 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
 410 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
 411 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
 412
 413 static struct attribute *gl518_attributes[] = {
 414         &dev_attr_in3_input.attr,
 415         &dev_attr_in0_min.attr,
 416         &dev_attr_in1_min.attr,
 417         &dev_attr_in2_min.attr,
 418         &dev_attr_in3_min.attr,
 419         &dev_attr_in0_max.attr,
 420         &dev_attr_in1_max.attr,
 421         &dev_attr_in2_max.attr,
 422         &dev_attr_in3_max.attr,
 423         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 424         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 425         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 426         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 427         &sensor_dev_attr_in0_beep.dev_attr.attr,
 428         &sensor_dev_attr_in1_beep.dev_attr.attr,
 429         &sensor_dev_attr_in2_beep.dev_attr.attr,
 430         &sensor_dev_attr_in3_beep.dev_attr.attr,
 431
 432         &dev_attr_fan1_auto.attr,
 433         &sensor_dev_attr_fan1_input.dev_attr.attr,
 434         &sensor_dev_attr_fan2_input.dev_attr.attr,
 435         &sensor_dev_attr_fan1_min.dev_attr.attr,
 436         &sensor_dev_attr_fan2_min.dev_attr.attr,
 437         &sensor_dev_attr_fan1_div.dev_attr.attr,
 438         &sensor_dev_attr_fan2_div.dev_attr.attr,
 439         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 440         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 441         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 442         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 443
 444         &dev_attr_temp1_input.attr,
 445         &dev_attr_temp1_max.attr,
 446         &dev_attr_temp1_max_hyst.attr,
 447         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 448         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 449
 450         &dev_attr_alarms.attr,
 451         &dev_attr_beep_enable.attr,
 452         &dev_attr_beep_mask.attr,
 453         NULL
 454 };
 455
 456 static const struct attribute_group gl518_group = {
 457         .attrs = gl518_attributes,
 458 };
 459
 460 static struct attribute *gl518_attributes_r80[] = {
 461         &dev_attr_in0_input.attr,
 462         &dev_attr_in1_input.attr,
 463         &dev_attr_in2_input.attr,
 464         NULL
 465 };
 466
 467 static const struct attribute_group gl518_group_r80 = {
 468         .attrs = gl518_attributes_r80,
 469 };
 470
 471 /*
 472  * Real code
 473  */
 474
 475 static int gl518_attach_adapter(struct i2c_adapter *adapter)
 476 {
 477         if (!(adapter->class & I2C_CLASS_HWMON))
 478                 return 0;
 479         return i2c_probe(adapter, &addr_data, gl518_detect);
 480 }
 481
 482 static int gl518_detect(struct i2c_adapter *adapter, int address, int kind)
 483 {
 484         int i;
 485         struct i2c_client *client;
 486         struct gl518_data *data;
 487         int err = 0;
 488
 489         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 490                                      I2C_FUNC_SMBUS_WORD_DATA))
 491                 goto exit;
 492
 493         /* OK. For now, we presume we have a valid client. We now create the
 494            client structure, even though we cannot fill it completely yet.
 495            But it allows us to access gl518_{read,write}_value. */
 496
 497         if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) {
 498                 err = -ENOMEM;
 499                 goto exit;
 500         }
 501
 502         client = &data->client;
 503         i2c_set_clientdata(client, data);
 504
 505         client->addr = address;
 506         client->adapter = adapter;
 507         client->driver = &gl518_driver;
 508
 509         /* Now, we do the remaining detection. */
 510
 511         if (kind < 0) {
 512                 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
 513                  || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
 514                         goto exit_free;
 515         }
 516
 517         /* Determine the chip type. */
 518         if (kind <= 0) {
 519                 i = gl518_read_value(client, GL518_REG_REVISION);
 520                 if (i == 0x00) {
 521                         kind = gl518sm_r00;
 522                 } else if (i == 0x80) {
 523                         kind = gl518sm_r80;
 524                 } else {
 525                         if (kind <= 0)
 526                                 dev_info(&adapter->dev,
 527                                     "Ignoring 'force' parameter for unknown "
 528                                     "chip at adapter %d, address 0x%02x\n",
 529                                     i2c_adapter_id(adapter), address);
 530                         goto exit_free;
 531                 }
 532         }
 533
 534         /* Fill in the remaining client fields */
 535         strlcpy(client->name, "gl518sm", I2C_NAME_SIZE);
 536         data->type = kind;
 537         mutex_init(&data->update_lock);
 538
 539         /* Tell the I2C layer a new client has arrived */
 540         if ((err = i2c_attach_client(client)))
 541                 goto exit_free;
 542
 543         /* Initialize the GL518SM chip */
 544         data->alarm_mask = 0xff;
 545         gl518_init_client(client);
 546
 547         /* Register sysfs hooks */
 548         if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
 549                 goto exit_detach;
 550         if (data->type == gl518sm_r80)
 551                 if ((err = sysfs_create_group(&client->dev.kobj,
 552                                               &gl518_group_r80)))
 553                         goto exit_remove_files;
 554
 555         data->hwmon_dev = hwmon_device_register(&client->dev);
 556         if (IS_ERR(data->hwmon_dev)) {
 557                 err = PTR_ERR(data->hwmon_dev);
 558                 goto exit_remove_files;
 559         }
 560
 561         return 0;
 562
 563 exit_remove_files:
 564         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 565         if (data->type == gl518sm_r80)
 566                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 567 exit_detach:
 568         i2c_detach_client(client);
 569 exit_free:
 570         kfree(data);
 571 exit:
 572         return err;
 573 }
 574
 575
 576 /* Called when we have found a new GL518SM.
 577    Note that we preserve D4:NoFan2 and D2:beep_enable. */
 578 static void gl518_init_client(struct i2c_client *client)
 579 {
 580         /* Make sure we leave D7:Reset untouched */
 581         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
 582
 583         /* Comparator mode (D3=0), standby mode (D6=0) */
 584         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
 585
 586         /* Never interrupts */
 587         gl518_write_value(client, GL518_REG_MASK, 0x00);
 588
 589         /* Clear status register (D5=1), start (D6=1) */
 590         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
 591         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
 592 }
 593
 594 static int gl518_detach_client(struct i2c_client *client)
 595 {
 596         struct gl518_data *data = i2c_get_clientdata(client);
 597         int err;
 598
 599         hwmon_device_unregister(data->hwmon_dev);
 600         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 601         if (data->type == gl518sm_r80)
 602                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 603
 604         if ((err = i2c_detach_client(client)))
 605                 return err;
 606
 607         kfree(data);
 608         return 0;
 609 }
 610
 611 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 612    GL518 uses a high-byte first convention, which is exactly opposite to
 613    the SMBus standard. */
 614 static int gl518_read_value(struct i2c_client *client, u8 reg)
 615 {
 616         if ((reg >= 0x07) && (reg <= 0x0c))
 617                 return swab16(i2c_smbus_read_word_data(client, reg));
 618         else
 619                 return i2c_smbus_read_byte_data(client, reg);
 620 }
 621
 622 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
 623 {
 624         if ((reg >= 0x07) && (reg <= 0x0c))
 625                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 626         else
 627                 return i2c_smbus_write_byte_data(client, reg, value);
 628 }
 629
 630 static struct gl518_data *gl518_update_device(struct device *dev)
 631 {
 632         struct i2c_client *client = to_i2c_client(dev);
 633         struct gl518_data *data = i2c_get_clientdata(client);
 634         int val;
 635
 636         mutex_lock(&data->update_lock);
 637
 638         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 639             || !data->valid) {
 640                 dev_dbg(&client->dev, "Starting gl518 update\n");
 641
 642                 data->alarms = gl518_read_value(client, GL518_REG_INT);
 643                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 644
 645                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
 646                 data->voltage_min[0] = val & 0xff;
 647                 data->voltage_max[0] = (val >> 8) & 0xff;
 648                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
 649                 data->voltage_min[1] = val & 0xff;
 650                 data->voltage_max[1] = (val >> 8) & 0xff;
 651                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
 652                 data->voltage_min[2] = val & 0xff;
 653                 data->voltage_max[2] = (val >> 8) & 0xff;
 654                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
 655                 data->voltage_min[3] = val & 0xff;
 656                 data->voltage_max[3] = (val >> 8) & 0xff;
 657
 658                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
 659                 data->fan_in[0] = (val >> 8) & 0xff;
 660                 data->fan_in[1] = val & 0xff;
 661
 662                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 663                 data->fan_min[0] = (val >> 8) & 0xff;
 664                 data->fan_min[1] = val & 0xff;
 665
 666                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
 667                 data->temp_max =
 668                     gl518_read_value(client, GL518_REG_TEMP_MAX);
 669                 data->temp_hyst =
 670                     gl518_read_value(client, GL518_REG_TEMP_HYST);
 671
 672                 val = gl518_read_value(client, GL518_REG_MISC);
 673                 data->fan_div[0] = (val >> 6) & 0x03;
 674                 data->fan_div[1] = (val >> 4) & 0x03;
 675                 data->fan_auto1  = (val >> 3) & 0x01;
 676
 677                 data->alarms &= data->alarm_mask;
 678
 679                 val = gl518_read_value(client, GL518_REG_CONF);
 680                 data->beep_enable = (val >> 2) & 1;
 681
 682                 if (data->type != gl518sm_r00) {
 683                         data->voltage_in[0] =
 684                             gl518_read_value(client, GL518_REG_VDD);
 685                         data->voltage_in[1] =
 686                             gl518_read_value(client, GL518_REG_VIN1);
 687                         data->voltage_in[2] =
 688                             gl518_read_value(client, GL518_REG_VIN2);
 689                 }
 690                 data->voltage_in[3] =
 691                     gl518_read_value(client, GL518_REG_VIN3);
 692
 693                 data->last_updated = jiffies;
 694                 data->valid = 1;
 695         }
 696
 697         mutex_unlock(&data->update_lock);
 698
 699         return data;
 700 }
 701
 702 static int __init sensors_gl518sm_init(void)
 703 {
 704         return i2c_add_driver(&gl518_driver);
 705 }
 706
 707 static void __exit sensors_gl518sm_exit(void)
 708 {
 709         i2c_del_driver(&gl518_driver);
 710 }
 711
 712 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 713         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
 714         "Hong-Gunn Chew <hglinux@gunnet.org>");
 715 MODULE_DESCRIPTION("GL518SM driver");
 716 MODULE_LICENSE("GPL");
 717
 718 module_init(sensors_gl518sm_init);
 719 module_exit(sensors_gl518sm_exit);