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 <<<<<<< HEAD:drivers/hwmon/gl518sm.c
  48 static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  49 =======
  50 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  51 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/hwmon/gl518sm.c
  52
  53 /* Insmod parameters */
  54 I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80);
  55
  56 /* Many GL518 constants specified below */
  57
  58 /* The GL518 registers */
  59 #define GL518_REG_CHIP_ID       0x00
  60 #define GL518_REG_REVISION      0x01
  61 #define GL518_REG_VENDOR_ID     0x02
  62 #define GL518_REG_CONF          0x03
  63 #define GL518_REG_TEMP_IN       0x04
  64 #define GL518_REG_TEMP_MAX      0x05
  65 #define GL518_REG_TEMP_HYST     0x06
  66 #define GL518_REG_FAN_COUNT     0x07
  67 #define GL518_REG_FAN_LIMIT     0x08
  68 #define GL518_REG_VIN1_LIMIT    0x09
  69 #define GL518_REG_VIN2_LIMIT    0x0a
  70 #define GL518_REG_VIN3_LIMIT    0x0b
  71 #define GL518_REG_VDD_LIMIT     0x0c
  72 #define GL518_REG_VIN3          0x0d
  73 #define GL518_REG_MISC          0x0f
  74 #define GL518_REG_ALARM         0x10
  75 #define GL518_REG_MASK          0x11
  76 #define GL518_REG_INT           0x12
  77 #define GL518_REG_VIN2          0x13
  78 #define GL518_REG_VIN1          0x14
  79 #define GL518_REG_VDD           0x15
  80
  81
  82 /*
  83  * Conversions. Rounding and limit checking is only done on the TO_REG
  84  * variants. Note that you should be a bit careful with which arguments
  85  * these macros are called: arguments may be evaluated more than once.
  86  * Fixing this is just not worth it.
  87  */
  88
  89 #define RAW_FROM_REG(val)       val
  90
  91 #define BOOL_FROM_REG(val)      ((val)?0:1)
  92 #define BOOL_TO_REG(val)        ((val)?0:1)
  93
  94 #define TEMP_TO_REG(val)        (SENSORS_LIMIT(((((val)<0? \
  95                                 (val)-500:(val)+500)/1000)+119),0,255))
  96 #define TEMP_FROM_REG(val)      (((val) - 119) * 1000)
  97
  98 static inline u8 FAN_TO_REG(long rpm, int div)
  99 {
 100         long rpmdiv;
 101         if (rpm == 0)
 102                 return 0;
 103         rpmdiv = SENSORS_LIMIT(rpm, 1, 960000) * div;
 104         return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
 105 }
 106 #define FAN_FROM_REG(val,div)   ((val)==0 ? 0 : (480000/((val)*(div))))
 107
 108 #define IN_TO_REG(val)          (SENSORS_LIMIT((((val)+9)/19),0,255))
 109 #define IN_FROM_REG(val)        ((val)*19)
 110
 111 #define VDD_TO_REG(val)         (SENSORS_LIMIT((((val)*4+47)/95),0,255))
 112 #define VDD_FROM_REG(val)       (((val)*95+2)/4)
 113
 114 #define DIV_FROM_REG(val)       (1 << (val))
 115
 116 #define BEEP_MASK_TO_REG(val)   ((val) & 0x7f & data->alarm_mask)
 117 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
 118
 119 /* Each client has this additional data */
 120 struct gl518_data {
 121         struct i2c_client client;
 122         struct device *hwmon_dev;
 123         enum chips type;
 124
 125         struct mutex update_lock;
 126         char valid;             /* !=0 if following fields are valid */
 127         unsigned long last_updated;     /* In jiffies */
 128
 129         u8 voltage_in[4];       /* Register values; [0] = VDD */
 130         u8 voltage_min[4];      /* Register values; [0] = VDD */
 131         u8 voltage_max[4];      /* Register values; [0] = VDD */
 132         u8 fan_in[2];
 133         u8 fan_min[2];
 134         u8 fan_div[2];          /* Register encoding, shifted right */
 135         u8 fan_auto1;           /* Boolean */
 136         u8 temp_in;             /* Register values */
 137         u8 temp_max;            /* Register values */
 138         u8 temp_hyst;           /* Register values */
 139         u8 alarms;              /* Register value */
 140         u8 alarm_mask;
 141         u8 beep_mask;           /* Register value */
 142         u8 beep_enable;         /* Boolean */
 143 };
 144
 145 static int gl518_attach_adapter(struct i2c_adapter *adapter);
 146 static int gl518_detect(struct i2c_adapter *adapter, int address, int kind);
 147 static void gl518_init_client(struct i2c_client *client);
 148 static int gl518_detach_client(struct i2c_client *client);
 149 static int gl518_read_value(struct i2c_client *client, u8 reg);
 150 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
 151 static struct gl518_data *gl518_update_device(struct device *dev);
 152
 153 /* This is the driver that will be inserted */
 154 static struct i2c_driver gl518_driver = {
 155         .driver = {
 156                 .name   = "gl518sm",
 157         },
 158         .attach_adapter = gl518_attach_adapter,
 159         .detach_client  = gl518_detach_client,
 160 };
 161
 162 /*
 163  * Sysfs stuff
 164  */
 165
 166 #define show(type, suffix, value)                                       \
 167 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)              \
 168 {                                                                       \
 169         struct gl518_data *data = gl518_update_device(dev);             \
 170         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
 171 }
 172
 173 show(TEMP, temp_input1, temp_in);
 174 show(TEMP, temp_max1, temp_max);
 175 show(TEMP, temp_hyst1, temp_hyst);
 176 show(BOOL, fan_auto1, fan_auto1);
 177 show(VDD, in_input0, voltage_in[0]);
 178 show(IN, in_input1, voltage_in[1]);
 179 show(IN, in_input2, voltage_in[2]);
 180 show(IN, in_input3, voltage_in[3]);
 181 show(VDD, in_min0, voltage_min[0]);
 182 show(IN, in_min1, voltage_min[1]);
 183 show(IN, in_min2, voltage_min[2]);
 184 show(IN, in_min3, voltage_min[3]);
 185 show(VDD, in_max0, voltage_max[0]);
 186 show(IN, in_max1, voltage_max[1]);
 187 show(IN, in_max2, voltage_max[2]);
 188 show(IN, in_max3, voltage_max[3]);
 189 show(RAW, alarms, alarms);
 190 show(BOOL, beep_enable, beep_enable);
 191 show(BEEP_MASK, beep_mask, beep_mask);
 192
 193 static ssize_t show_fan_input(struct device *dev,
 194                               struct device_attribute *attr, char *buf)
 195 {
 196         int nr = to_sensor_dev_attr(attr)->index;
 197         struct gl518_data *data = gl518_update_device(dev);
 198         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
 199                                         DIV_FROM_REG(data->fan_div[nr])));
 200 }
 201
 202 static ssize_t show_fan_min(struct device *dev,
 203                             struct device_attribute *attr, char *buf)
 204 {
 205         int nr = to_sensor_dev_attr(attr)->index;
 206         struct gl518_data *data = gl518_update_device(dev);
 207         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 208                                         DIV_FROM_REG(data->fan_div[nr])));
 209 }
 210
 211 static ssize_t show_fan_div(struct device *dev,
 212                             struct device_attribute *attr, char *buf)
 213 {
 214         int nr = to_sensor_dev_attr(attr)->index;
 215         struct gl518_data *data = gl518_update_device(dev);
 216         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 217 }
 218
 219 #define set(type, suffix, value, reg)                                   \
 220 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 221         size_t count)                                                   \
 222 {                                                                       \
 223         struct i2c_client *client = to_i2c_client(dev);                 \
 224         struct gl518_data *data = i2c_get_clientdata(client);           \
 225         long val = simple_strtol(buf, NULL, 10);                        \
 226                                                                         \
 227         mutex_lock(&data->update_lock);                                 \
 228         data->value = type##_TO_REG(val);                               \
 229         gl518_write_value(client, reg, data->value);                    \
 230         mutex_unlock(&data->update_lock);                               \
 231         return count;                                                   \
 232 }
 233
 234 #define set_bits(type, suffix, value, reg, mask, shift)                 \
 235 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 236         size_t count)                                                   \
 237 {                                                                       \
 238         struct i2c_client *client = to_i2c_client(dev);                 \
 239         struct gl518_data *data = i2c_get_clientdata(client);           \
 240         int regvalue;                                                   \
 241         unsigned long val = simple_strtoul(buf, NULL, 10);              \
 242                                                                         \
 243         mutex_lock(&data->update_lock);                                 \
 244         regvalue = gl518_read_value(client, reg);                       \
 245         data->value = type##_TO_REG(val);                               \
 246         regvalue = (regvalue & ~mask) | (data->value << shift);         \
 247         gl518_write_value(client, reg, regvalue);                       \
 248         mutex_unlock(&data->update_lock);                               \
 249         return count;                                                   \
 250 }
 251
 252 #define set_low(type, suffix, value, reg)                               \
 253         set_bits(type, suffix, value, reg, 0x00ff, 0)
 254 #define set_high(type, suffix, value, reg)                              \
 255         set_bits(type, suffix, value, reg, 0xff00, 8)
 256
 257 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
 258 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
 259 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
 260 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
 261 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
 262 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
 263 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
 264 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
 265 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
 266 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
 267 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
 268 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
 269 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
 270
 271 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 272                            const char *buf, size_t count)
 273 {
 274         struct i2c_client *client = to_i2c_client(dev);
 275         struct gl518_data *data = i2c_get_clientdata(client);
 276         int nr = to_sensor_dev_attr(attr)->index;
 277         int regvalue;
 278         unsigned long val = simple_strtoul(buf, NULL, 10);
 279
 280         mutex_lock(&data->update_lock);
 281         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 282         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 283         regvalue = (regvalue & (0xff << (8 * nr)))
 284                  | (data->fan_min[nr] << (8 * (1 - nr)));
 285         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
 286
 287         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 288         if (data->fan_min[nr] == 0)
 289                 data->alarm_mask &= ~(0x20 << nr);
 290         else
 291                 data->alarm_mask |= (0x20 << nr);
 292         data->beep_mask &= data->alarm_mask;
 293         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 294
 295         mutex_unlock(&data->update_lock);
 296         return count;
 297 }
 298
 299 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 300                            const char *buf, size_t count)
 301 {
 302         struct i2c_client *client = to_i2c_client(dev);
 303         struct gl518_data *data = i2c_get_clientdata(client);
 304         int nr = to_sensor_dev_attr(attr)->index;
 305         int regvalue;
 306         unsigned long val = simple_strtoul(buf, NULL, 10);
 307
 308         switch (val) {
 309         case 1: val = 0; break;
 310         case 2: val = 1; break;
 311         case 4: val = 2; break;
 312         case 8: val = 3; break;
 313         default:
 314                 dev_err(dev, "Invalid fan clock divider %lu, choose one "
 315                         "of 1, 2, 4 or 8\n", val);
 316                 return -EINVAL;
 317         }
 318
 319         mutex_lock(&data->update_lock);
 320         regvalue = gl518_read_value(client, GL518_REG_MISC);
 321         data->fan_div[nr] = val;
 322         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
 323                  | (data->fan_div[nr] << (6 - 2 * nr));
 324         gl518_write_value(client, GL518_REG_MISC, regvalue);
 325         mutex_unlock(&data->update_lock);
 326         return count;
 327 }
 328
 329 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
 330 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
 331 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
 332         show_temp_hyst1, set_temp_hyst1);
 333 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
 334 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
 335 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
 336 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
 337         show_fan_min, set_fan_min, 0);
 338 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
 339         show_fan_min, set_fan_min, 1);
 340 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
 341         show_fan_div, set_fan_div, 0);
 342 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
 343         show_fan_div, set_fan_div, 1);
 344 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
 345 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
 346 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
 347 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
 348 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
 349 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
 350 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
 351 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
 352 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
 353 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
 354 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
 355 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
 356 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 357 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
 358         show_beep_enable, set_beep_enable);
 359 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
 360         show_beep_mask, set_beep_mask);
 361
 362 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 363                           char *buf)
 364 {
 365         int bitnr = to_sensor_dev_attr(attr)->index;
 366         struct gl518_data *data = gl518_update_device(dev);
 367         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 368 }
 369
 370 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 371 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 372 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 373 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 374 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 375 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
 376 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
 377
 378 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 379                           char *buf)
 380 {
 381         int bitnr = to_sensor_dev_attr(attr)->index;
 382         struct gl518_data *data = gl518_update_device(dev);
 383         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 384 }
 385
 386 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 387                         const char *buf, size_t count)
 388 {
 389         struct i2c_client *client = to_i2c_client(dev);
 390         struct gl518_data *data = i2c_get_clientdata(client);
 391         int bitnr = to_sensor_dev_attr(attr)->index;
 392         unsigned long bit;
 393
 394         bit = simple_strtoul(buf, NULL, 10);
 395         if (bit & ~1)
 396                 return -EINVAL;
 397
 398         mutex_lock(&data->update_lock);
 399         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 400         if (bit)
 401                 data->beep_mask |= (1 << bitnr);
 402         else
 403                 data->beep_mask &= ~(1 << bitnr);
 404         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 405         mutex_unlock(&data->update_lock);
 406         return count;
 407 }
 408
 409 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
 410 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
 411 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
 412 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
 413 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
 414 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
 415 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
 416
 417 static struct attribute *gl518_attributes[] = {
 418         &dev_attr_in3_input.attr,
 419         &dev_attr_in0_min.attr,
 420         &dev_attr_in1_min.attr,
 421         &dev_attr_in2_min.attr,
 422         &dev_attr_in3_min.attr,
 423         &dev_attr_in0_max.attr,
 424         &dev_attr_in1_max.attr,
 425         &dev_attr_in2_max.attr,
 426         &dev_attr_in3_max.attr,
 427         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 428         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 429         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 430         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 431         &sensor_dev_attr_in0_beep.dev_attr.attr,
 432         &sensor_dev_attr_in1_beep.dev_attr.attr,
 433         &sensor_dev_attr_in2_beep.dev_attr.attr,
 434         &sensor_dev_attr_in3_beep.dev_attr.attr,
 435
 436         &dev_attr_fan1_auto.attr,
 437         &sensor_dev_attr_fan1_input.dev_attr.attr,
 438         &sensor_dev_attr_fan2_input.dev_attr.attr,
 439         &sensor_dev_attr_fan1_min.dev_attr.attr,
 440         &sensor_dev_attr_fan2_min.dev_attr.attr,
 441         &sensor_dev_attr_fan1_div.dev_attr.attr,
 442         &sensor_dev_attr_fan2_div.dev_attr.attr,
 443         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 444         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 445         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 446         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 447
 448         &dev_attr_temp1_input.attr,
 449         &dev_attr_temp1_max.attr,
 450         &dev_attr_temp1_max_hyst.attr,
 451         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 452         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 453
 454         &dev_attr_alarms.attr,
 455         &dev_attr_beep_enable.attr,
 456         &dev_attr_beep_mask.attr,
 457         NULL
 458 };
 459
 460 static const struct attribute_group gl518_group = {
 461         .attrs = gl518_attributes,
 462 };
 463
 464 static struct attribute *gl518_attributes_r80[] = {
 465         &dev_attr_in0_input.attr,
 466         &dev_attr_in1_input.attr,
 467         &dev_attr_in2_input.attr,
 468         NULL
 469 };
 470
 471 static const struct attribute_group gl518_group_r80 = {
 472         .attrs = gl518_attributes_r80,
 473 };
 474
 475 /*
 476  * Real code
 477  */
 478
 479 static int gl518_attach_adapter(struct i2c_adapter *adapter)
 480 {
 481         if (!(adapter->class & I2C_CLASS_HWMON))
 482                 return 0;
 483         return i2c_probe(adapter, &addr_data, gl518_detect);
 484 }
 485
 486 static int gl518_detect(struct i2c_adapter *adapter, int address, int kind)
 487 {
 488         int i;
 489         struct i2c_client *client;
 490         struct gl518_data *data;
 491         int err = 0;
 492
 493         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 494                                      I2C_FUNC_SMBUS_WORD_DATA))
 495                 goto exit;
 496
 497         /* OK. For now, we presume we have a valid client. We now create the
 498            client structure, even though we cannot fill it completely yet.
 499            But it allows us to access gl518_{read,write}_value. */
 500
 501         if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) {
 502                 err = -ENOMEM;
 503                 goto exit;
 504         }
 505
 506         client = &data->client;
 507         i2c_set_clientdata(client, data);
 508
 509         client->addr = address;
 510         client->adapter = adapter;
 511         client->driver = &gl518_driver;
 512
 513         /* Now, we do the remaining detection. */
 514
 515         if (kind < 0) {
 516                 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
 517                  || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
 518                         goto exit_free;
 519         }
 520
 521         /* Determine the chip type. */
 522         if (kind <= 0) {
 523                 i = gl518_read_value(client, GL518_REG_REVISION);
 524                 if (i == 0x00) {
 525                         kind = gl518sm_r00;
 526                 } else if (i == 0x80) {
 527                         kind = gl518sm_r80;
 528                 } else {
 529                         if (kind <= 0)
 530                                 dev_info(&adapter->dev,
 531                                     "Ignoring 'force' parameter for unknown "
 532                                     "chip at adapter %d, address 0x%02x\n",
 533                                     i2c_adapter_id(adapter), address);
 534                         goto exit_free;
 535                 }
 536         }
 537
 538         /* Fill in the remaining client fields */
 539         strlcpy(client->name, "gl518sm", I2C_NAME_SIZE);
 540         data->type = kind;
 541         mutex_init(&data->update_lock);
 542
 543         /* Tell the I2C layer a new client has arrived */
 544         if ((err = i2c_attach_client(client)))
 545                 goto exit_free;
 546
 547         /* Initialize the GL518SM chip */
 548         data->alarm_mask = 0xff;
 549         gl518_init_client(client);
 550
 551         /* Register sysfs hooks */
 552         if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
 553                 goto exit_detach;
 554         if (data->type == gl518sm_r80)
 555                 if ((err = sysfs_create_group(&client->dev.kobj,
 556                                               &gl518_group_r80)))
 557                         goto exit_remove_files;
 558
 559         data->hwmon_dev = hwmon_device_register(&client->dev);
 560         if (IS_ERR(data->hwmon_dev)) {
 561                 err = PTR_ERR(data->hwmon_dev);
 562                 goto exit_remove_files;
 563         }
 564
 565         return 0;
 566
 567 exit_remove_files:
 568         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 569         if (data->type == gl518sm_r80)
 570                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 571 exit_detach:
 572         i2c_detach_client(client);
 573 exit_free:
 574         kfree(data);
 575 exit:
 576         return err;
 577 }
 578
 579
 580 /* Called when we have found a new GL518SM.
 581    Note that we preserve D4:NoFan2 and D2:beep_enable. */
 582 static void gl518_init_client(struct i2c_client *client)
 583 {
 584         /* Make sure we leave D7:Reset untouched */
 585         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
 586
 587         /* Comparator mode (D3=0), standby mode (D6=0) */
 588         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
 589
 590         /* Never interrupts */
 591         gl518_write_value(client, GL518_REG_MASK, 0x00);
 592
 593         /* Clear status register (D5=1), start (D6=1) */
 594         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
 595         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
 596 }
 597
 598 static int gl518_detach_client(struct i2c_client *client)
 599 {
 600         struct gl518_data *data = i2c_get_clientdata(client);
 601         int err;
 602
 603         hwmon_device_unregister(data->hwmon_dev);
 604         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 605         if (data->type == gl518sm_r80)
 606                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 607
 608         if ((err = i2c_detach_client(client)))
 609                 return err;
 610
 611         kfree(data);
 612         return 0;
 613 }
 614
 615 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 616    GL518 uses a high-byte first convention, which is exactly opposite to
 617    the SMBus standard. */
 618 static int gl518_read_value(struct i2c_client *client, u8 reg)
 619 {
 620         if ((reg >= 0x07) && (reg <= 0x0c))
 621                 return swab16(i2c_smbus_read_word_data(client, reg));
 622         else
 623                 return i2c_smbus_read_byte_data(client, reg);
 624 }
 625
 626 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
 627 {
 628         if ((reg >= 0x07) && (reg <= 0x0c))
 629                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 630         else
 631                 return i2c_smbus_write_byte_data(client, reg, value);
 632 }
 633
 634 static struct gl518_data *gl518_update_device(struct device *dev)
 635 {
 636         struct i2c_client *client = to_i2c_client(dev);
 637         struct gl518_data *data = i2c_get_clientdata(client);
 638         int val;
 639
 640         mutex_lock(&data->update_lock);
 641
 642         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 643             || !data->valid) {
 644                 dev_dbg(&client->dev, "Starting gl518 update\n");
 645
 646                 data->alarms = gl518_read_value(client, GL518_REG_INT);
 647                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 648
 649                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
 650                 data->voltage_min[0] = val & 0xff;
 651                 data->voltage_max[0] = (val >> 8) & 0xff;
 652                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
 653                 data->voltage_min[1] = val & 0xff;
 654                 data->voltage_max[1] = (val >> 8) & 0xff;
 655                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
 656                 data->voltage_min[2] = val & 0xff;
 657                 data->voltage_max[2] = (val >> 8) & 0xff;
 658                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
 659                 data->voltage_min[3] = val & 0xff;
 660                 data->voltage_max[3] = (val >> 8) & 0xff;
 661
 662                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
 663                 data->fan_in[0] = (val >> 8) & 0xff;
 664                 data->fan_in[1] = val & 0xff;
 665
 666                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 667                 data->fan_min[0] = (val >> 8) & 0xff;
 668                 data->fan_min[1] = val & 0xff;
 669
 670                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
 671                 data->temp_max =
 672                     gl518_read_value(client, GL518_REG_TEMP_MAX);
 673                 data->temp_hyst =
 674                     gl518_read_value(client, GL518_REG_TEMP_HYST);
 675
 676                 val = gl518_read_value(client, GL518_REG_MISC);
 677                 data->fan_div[0] = (val >> 6) & 0x03;
 678                 data->fan_div[1] = (val >> 4) & 0x03;
 679                 data->fan_auto1  = (val >> 3) & 0x01;
 680
 681                 data->alarms &= data->alarm_mask;
 682
 683                 val = gl518_read_value(client, GL518_REG_CONF);
 684                 data->beep_enable = (val >> 2) & 1;
 685
 686                 if (data->type != gl518sm_r00) {
 687                         data->voltage_in[0] =
 688                             gl518_read_value(client, GL518_REG_VDD);
 689                         data->voltage_in[1] =
 690                             gl518_read_value(client, GL518_REG_VIN1);
 691                         data->voltage_in[2] =
 692                             gl518_read_value(client, GL518_REG_VIN2);
 693                 }
 694                 data->voltage_in[3] =
 695                     gl518_read_value(client, GL518_REG_VIN3);
 696
 697                 data->last_updated = jiffies;
 698                 data->valid = 1;
 699         }
 700
 701         mutex_unlock(&data->update_lock);
 702
 703         return data;
 704 }
 705
 706 static int __init sensors_gl518sm_init(void)
 707 {
 708         return i2c_add_driver(&gl518_driver);
 709 }
 710
 711 static void __exit sensors_gl518sm_exit(void)
 712 {
 713         i2c_del_driver(&gl518_driver);
 714 }
 715
 716 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 717         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
 718         "Hong-Gunn Chew <hglinux@gunnet.org>");
 719 MODULE_DESCRIPTION("GL518SM driver");
 720 MODULE_LICENSE("GPL");
 721
 722 module_init(sensors_gl518sm_init);
 723 module_exit(sensors_gl518sm_exit);