SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 /* 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 device *hwmon_dev;
 118         enum chips type;
 119
 120         struct mutex update_lock;
 121         char valid;             /* !=0 if following fields are valid */
 122         unsigned long last_updated;     /* In jiffies */
 123
 124         u8 voltage_in[4];       /* Register values; [0] = VDD */
 125         u8 voltage_min[4];      /* Register values; [0] = VDD */
 126         u8 voltage_max[4];      /* Register values; [0] = VDD */
 127         u8 fan_in[2];
 128         u8 fan_min[2];
 129         u8 fan_div[2];          /* Register encoding, shifted right */
 130         u8 fan_auto1;           /* Boolean */
 131         u8 temp_in;             /* Register values */
 132         u8 temp_max;            /* Register values */
 133         u8 temp_hyst;           /* Register values */
 134         u8 alarms;              /* Register value */
 135         u8 alarm_mask;
 136         u8 beep_mask;           /* Register value */
 137         u8 beep_enable;         /* Boolean */
 138 };
 139
 140 static int gl518_probe(struct i2c_client *client,
 141                        const struct i2c_device_id *id);
 142 static int gl518_detect(struct i2c_client *client, int kind,
 143                         struct i2c_board_info *info);
 144 static void gl518_init_client(struct i2c_client *client);
 145 static int gl518_remove(struct i2c_client *client);
 146 static int gl518_read_value(struct i2c_client *client, u8 reg);
 147 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
 148 static struct gl518_data *gl518_update_device(struct device *dev);
 149
 150 static const struct i2c_device_id gl518_id[] = {
 151         { "gl518sm", 0 },
 152         { }
 153 };
 154 MODULE_DEVICE_TABLE(i2c, gl518_id);
 155
 156 /* This is the driver that will be inserted */
 157 static struct i2c_driver gl518_driver = {
 158         .class          = I2C_CLASS_HWMON,
 159         .driver = {
 160                 .name   = "gl518sm",
 161         },
 162         .probe          = gl518_probe,
 163         .remove         = gl518_remove,
 164         .id_table       = gl518_id,
 165         .detect         = gl518_detect,
 166         .address_data   = &addr_data,
 167 };
 168
 169 /*
 170  * Sysfs stuff
 171  */
 172
 173 #define show(type, suffix, value)                                       \
 174 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)              \
 175 {                                                                       \
 176         struct gl518_data *data = gl518_update_device(dev);             \
 177         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
 178 }
 179
 180 show(TEMP, temp_input1, temp_in);
 181 show(TEMP, temp_max1, temp_max);
 182 show(TEMP, temp_hyst1, temp_hyst);
 183 show(BOOL, fan_auto1, fan_auto1);
 184 show(VDD, in_input0, voltage_in[0]);
 185 show(IN, in_input1, voltage_in[1]);
 186 show(IN, in_input2, voltage_in[2]);
 187 show(IN, in_input3, voltage_in[3]);
 188 show(VDD, in_min0, voltage_min[0]);
 189 show(IN, in_min1, voltage_min[1]);
 190 show(IN, in_min2, voltage_min[2]);
 191 show(IN, in_min3, voltage_min[3]);
 192 show(VDD, in_max0, voltage_max[0]);
 193 show(IN, in_max1, voltage_max[1]);
 194 show(IN, in_max2, voltage_max[2]);
 195 show(IN, in_max3, voltage_max[3]);
 196 show(RAW, alarms, alarms);
 197 show(BOOL, beep_enable, beep_enable);
 198 show(BEEP_MASK, beep_mask, beep_mask);
 199
 200 static ssize_t show_fan_input(struct device *dev,
 201                               struct device_attribute *attr, char *buf)
 202 {
 203         int nr = to_sensor_dev_attr(attr)->index;
 204         struct gl518_data *data = gl518_update_device(dev);
 205         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
 206                                         DIV_FROM_REG(data->fan_div[nr])));
 207 }
 208
 209 static ssize_t show_fan_min(struct device *dev,
 210                             struct device_attribute *attr, char *buf)
 211 {
 212         int nr = to_sensor_dev_attr(attr)->index;
 213         struct gl518_data *data = gl518_update_device(dev);
 214         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 215                                         DIV_FROM_REG(data->fan_div[nr])));
 216 }
 217
 218 static ssize_t show_fan_div(struct device *dev,
 219                             struct device_attribute *attr, char *buf)
 220 {
 221         int nr = to_sensor_dev_attr(attr)->index;
 222         struct gl518_data *data = gl518_update_device(dev);
 223         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 224 }
 225
 226 #define set(type, suffix, value, reg)                                   \
 227 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 228         size_t count)                                                   \
 229 {                                                                       \
 230         struct i2c_client *client = to_i2c_client(dev);                 \
 231         struct gl518_data *data = i2c_get_clientdata(client);           \
 232         long val = simple_strtol(buf, NULL, 10);                        \
 233                                                                         \
 234         mutex_lock(&data->update_lock);                                 \
 235         data->value = type##_TO_REG(val);                               \
 236         gl518_write_value(client, reg, data->value);                    \
 237         mutex_unlock(&data->update_lock);                               \
 238         return count;                                                   \
 239 }
 240
 241 #define set_bits(type, suffix, value, reg, mask, shift)                 \
 242 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
 243         size_t count)                                                   \
 244 {                                                                       \
 245         struct i2c_client *client = to_i2c_client(dev);                 \
 246         struct gl518_data *data = i2c_get_clientdata(client);           \
 247         int regvalue;                                                   \
 248         unsigned long val = simple_strtoul(buf, NULL, 10);              \
 249                                                                         \
 250         mutex_lock(&data->update_lock);                                 \
 251         regvalue = gl518_read_value(client, reg);                       \
 252         data->value = type##_TO_REG(val);                               \
 253         regvalue = (regvalue & ~mask) | (data->value << shift);         \
 254         gl518_write_value(client, reg, regvalue);                       \
 255         mutex_unlock(&data->update_lock);                               \
 256         return count;                                                   \
 257 }
 258
 259 #define set_low(type, suffix, value, reg)                               \
 260         set_bits(type, suffix, value, reg, 0x00ff, 0)
 261 #define set_high(type, suffix, value, reg)                              \
 262         set_bits(type, suffix, value, reg, 0xff00, 8)
 263
 264 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
 265 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
 266 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
 267 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
 268 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
 269 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
 270 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
 271 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
 272 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
 273 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
 274 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
 275 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
 276 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
 277
 278 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 279                            const char *buf, size_t count)
 280 {
 281         struct i2c_client *client = to_i2c_client(dev);
 282         struct gl518_data *data = i2c_get_clientdata(client);
 283         int nr = to_sensor_dev_attr(attr)->index;
 284         int regvalue;
 285         unsigned long val = simple_strtoul(buf, NULL, 10);
 286
 287         mutex_lock(&data->update_lock);
 288         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 289         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 290         regvalue = (regvalue & (0xff << (8 * nr)))
 291                  | (data->fan_min[nr] << (8 * (1 - nr)));
 292         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
 293
 294         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 295         if (data->fan_min[nr] == 0)
 296                 data->alarm_mask &= ~(0x20 << nr);
 297         else
 298                 data->alarm_mask |= (0x20 << nr);
 299         data->beep_mask &= data->alarm_mask;
 300         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 301
 302         mutex_unlock(&data->update_lock);
 303         return count;
 304 }
 305
 306 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 307                            const char *buf, size_t count)
 308 {
 309         struct i2c_client *client = to_i2c_client(dev);
 310         struct gl518_data *data = i2c_get_clientdata(client);
 311         int nr = to_sensor_dev_attr(attr)->index;
 312         int regvalue;
 313         unsigned long val = simple_strtoul(buf, NULL, 10);
 314
 315         switch (val) {
 316         case 1: val = 0; break;
 317         case 2: val = 1; break;
 318         case 4: val = 2; break;
 319         case 8: val = 3; break;
 320         default:
 321                 dev_err(dev, "Invalid fan clock divider %lu, choose one "
 322                         "of 1, 2, 4 or 8\n", val);
 323                 return -EINVAL;
 324         }
 325
 326         mutex_lock(&data->update_lock);
 327         regvalue = gl518_read_value(client, GL518_REG_MISC);
 328         data->fan_div[nr] = val;
 329         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
 330                  | (data->fan_div[nr] << (6 - 2 * nr));
 331         gl518_write_value(client, GL518_REG_MISC, regvalue);
 332         mutex_unlock(&data->update_lock);
 333         return count;
 334 }
 335
 336 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
 337 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
 338 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
 339         show_temp_hyst1, set_temp_hyst1);
 340 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
 341 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
 342 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
 343 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
 344         show_fan_min, set_fan_min, 0);
 345 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
 346         show_fan_min, set_fan_min, 1);
 347 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
 348         show_fan_div, set_fan_div, 0);
 349 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
 350         show_fan_div, set_fan_div, 1);
 351 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
 352 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
 353 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
 354 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
 355 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
 356 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
 357 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
 358 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
 359 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
 360 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
 361 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
 362 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
 363 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 364 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
 365         show_beep_enable, set_beep_enable);
 366 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
 367         show_beep_mask, set_beep_mask);
 368
 369 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 370                           char *buf)
 371 {
 372         int bitnr = to_sensor_dev_attr(attr)->index;
 373         struct gl518_data *data = gl518_update_device(dev);
 374         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 375 }
 376
 377 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 378 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 379 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 380 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 381 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 382 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
 383 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
 384
 385 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 386                           char *buf)
 387 {
 388         int bitnr = to_sensor_dev_attr(attr)->index;
 389         struct gl518_data *data = gl518_update_device(dev);
 390         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 391 }
 392
 393 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 394                         const char *buf, size_t count)
 395 {
 396         struct i2c_client *client = to_i2c_client(dev);
 397         struct gl518_data *data = i2c_get_clientdata(client);
 398         int bitnr = to_sensor_dev_attr(attr)->index;
 399         unsigned long bit;
 400
 401         bit = simple_strtoul(buf, NULL, 10);
 402         if (bit & ~1)
 403                 return -EINVAL;
 404
 405         mutex_lock(&data->update_lock);
 406         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 407         if (bit)
 408                 data->beep_mask |= (1 << bitnr);
 409         else
 410                 data->beep_mask &= ~(1 << bitnr);
 411         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 412         mutex_unlock(&data->update_lock);
 413         return count;
 414 }
 415
 416 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
 417 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
 418 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
 419 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
 420 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
 421 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
 422 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
 423
 424 static struct attribute *gl518_attributes[] = {
 425         &dev_attr_in3_input.attr,
 426         &dev_attr_in0_min.attr,
 427         &dev_attr_in1_min.attr,
 428         &dev_attr_in2_min.attr,
 429         &dev_attr_in3_min.attr,
 430         &dev_attr_in0_max.attr,
 431         &dev_attr_in1_max.attr,
 432         &dev_attr_in2_max.attr,
 433         &dev_attr_in3_max.attr,
 434         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 435         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 436         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 437         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 438         &sensor_dev_attr_in0_beep.dev_attr.attr,
 439         &sensor_dev_attr_in1_beep.dev_attr.attr,
 440         &sensor_dev_attr_in2_beep.dev_attr.attr,
 441         &sensor_dev_attr_in3_beep.dev_attr.attr,
 442
 443         &dev_attr_fan1_auto.attr,
 444         &sensor_dev_attr_fan1_input.dev_attr.attr,
 445         &sensor_dev_attr_fan2_input.dev_attr.attr,
 446         &sensor_dev_attr_fan1_min.dev_attr.attr,
 447         &sensor_dev_attr_fan2_min.dev_attr.attr,
 448         &sensor_dev_attr_fan1_div.dev_attr.attr,
 449         &sensor_dev_attr_fan2_div.dev_attr.attr,
 450         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 451         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 452         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 453         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 454
 455         &dev_attr_temp1_input.attr,
 456         &dev_attr_temp1_max.attr,
 457         &dev_attr_temp1_max_hyst.attr,
 458         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 459         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 460
 461         &dev_attr_alarms.attr,
 462         &dev_attr_beep_enable.attr,
 463         &dev_attr_beep_mask.attr,
 464         NULL
 465 };
 466
 467 static const struct attribute_group gl518_group = {
 468         .attrs = gl518_attributes,
 469 };
 470
 471 static struct attribute *gl518_attributes_r80[] = {
 472         &dev_attr_in0_input.attr,
 473         &dev_attr_in1_input.attr,
 474         &dev_attr_in2_input.attr,
 475         NULL
 476 };
 477
 478 static const struct attribute_group gl518_group_r80 = {
 479         .attrs = gl518_attributes_r80,
 480 };
 481
 482 /*
 483  * Real code
 484  */
 485
 486 /* Return 0 if detection is successful, -ENODEV otherwise */
 487 static int gl518_detect(struct i2c_client *client, int kind,
 488                         struct i2c_board_info *info)
 489 {
 490         struct i2c_adapter *adapter = client->adapter;
 491         int i;
 492
 493         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 494                                      I2C_FUNC_SMBUS_WORD_DATA))
 495                 return -ENODEV;
 496
 497         /* Now, we do the remaining detection. */
 498
 499         if (kind < 0) {
 500                 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
 501                  || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
 502                         return -ENODEV;
 503         }
 504
 505         /* Determine the chip type. */
 506         if (kind <= 0) {
 507                 i = gl518_read_value(client, GL518_REG_REVISION);
 508                 if (i == 0x00) {
 509                         kind = gl518sm_r00;
 510                 } else if (i == 0x80) {
 511                         kind = gl518sm_r80;
 512                 } else {
 513                         if (kind <= 0)
 514                                 dev_info(&adapter->dev,
 515                                     "Ignoring 'force' parameter for unknown "
 516                                     "chip at adapter %d, address 0x%02x\n",
 517                                     i2c_adapter_id(adapter), client->addr);
 518                         return -ENODEV;
 519                 }
 520         }
 521
 522         strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
 523
 524         return 0;
 525 }
 526
 527 static int gl518_probe(struct i2c_client *client,
 528                        const struct i2c_device_id *id)
 529 {
 530         struct gl518_data *data;
 531         int err, revision;
 532
 533         data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL);
 534         if (!data) {
 535                 err = -ENOMEM;
 536                 goto exit;
 537         }
 538
 539         i2c_set_clientdata(client, data);
 540         revision = gl518_read_value(client, GL518_REG_REVISION);
 541         data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
 542         mutex_init(&data->update_lock);
 543
 544         /* Initialize the GL518SM chip */
 545         data->alarm_mask = 0xff;
 546         gl518_init_client(client);
 547
 548         /* Register sysfs hooks */
 549         if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
 550                 goto exit_free;
 551         if (data->type == gl518sm_r80)
 552                 if ((err = sysfs_create_group(&client->dev.kobj,
 553                                               &gl518_group_r80)))
 554                         goto exit_remove_files;
 555
 556         data->hwmon_dev = hwmon_device_register(&client->dev);
 557         if (IS_ERR(data->hwmon_dev)) {
 558                 err = PTR_ERR(data->hwmon_dev);
 559                 goto exit_remove_files;
 560         }
 561
 562         return 0;
 563
 564 exit_remove_files:
 565         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 566         if (data->type == gl518sm_r80)
 567                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 568 exit_free:
 569         kfree(data);
 570 exit:
 571         return err;
 572 }
 573
 574
 575 /* Called when we have found a new GL518SM.
 576    Note that we preserve D4:NoFan2 and D2:beep_enable. */
 577 static void gl518_init_client(struct i2c_client *client)
 578 {
 579         /* Make sure we leave D7:Reset untouched */
 580         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
 581
 582         /* Comparator mode (D3=0), standby mode (D6=0) */
 583         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
 584
 585         /* Never interrupts */
 586         gl518_write_value(client, GL518_REG_MASK, 0x00);
 587
 588         /* Clear status register (D5=1), start (D6=1) */
 589         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
 590         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
 591 }
 592
 593 static int gl518_remove(struct i2c_client *client)
 594 {
 595         struct gl518_data *data = i2c_get_clientdata(client);
 596
 597         hwmon_device_unregister(data->hwmon_dev);
 598         sysfs_remove_group(&client->dev.kobj, &gl518_group);
 599         if (data->type == gl518sm_r80)
 600                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
 601
 602         kfree(data);
 603         return 0;
 604 }
 605
 606 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
 607    GL518 uses a high-byte first convention, which is exactly opposite to
 608    the SMBus standard. */
 609 static int gl518_read_value(struct i2c_client *client, u8 reg)
 610 {
 611         if ((reg >= 0x07) && (reg <= 0x0c))
 612                 return swab16(i2c_smbus_read_word_data(client, reg));
 613         else
 614                 return i2c_smbus_read_byte_data(client, reg);
 615 }
 616
 617 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
 618 {
 619         if ((reg >= 0x07) && (reg <= 0x0c))
 620                 return i2c_smbus_write_word_data(client, reg, swab16(value));
 621         else
 622                 return i2c_smbus_write_byte_data(client, reg, value);
 623 }
 624
 625 static struct gl518_data *gl518_update_device(struct device *dev)
 626 {
 627         struct i2c_client *client = to_i2c_client(dev);
 628         struct gl518_data *data = i2c_get_clientdata(client);
 629         int val;
 630
 631         mutex_lock(&data->update_lock);
 632
 633         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 634             || !data->valid) {
 635                 dev_dbg(&client->dev, "Starting gl518 update\n");
 636
 637                 data->alarms = gl518_read_value(client, GL518_REG_INT);
 638                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 639
 640                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
 641                 data->voltage_min[0] = val & 0xff;
 642                 data->voltage_max[0] = (val >> 8) & 0xff;
 643                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
 644                 data->voltage_min[1] = val & 0xff;
 645                 data->voltage_max[1] = (val >> 8) & 0xff;
 646                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
 647                 data->voltage_min[2] = val & 0xff;
 648                 data->voltage_max[2] = (val >> 8) & 0xff;
 649                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
 650                 data->voltage_min[3] = val & 0xff;
 651                 data->voltage_max[3] = (val >> 8) & 0xff;
 652
 653                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
 654                 data->fan_in[0] = (val >> 8) & 0xff;
 655                 data->fan_in[1] = val & 0xff;
 656
 657                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 658                 data->fan_min[0] = (val >> 8) & 0xff;
 659                 data->fan_min[1] = val & 0xff;
 660
 661                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
 662                 data->temp_max =
 663                     gl518_read_value(client, GL518_REG_TEMP_MAX);
 664                 data->temp_hyst =
 665                     gl518_read_value(client, GL518_REG_TEMP_HYST);
 666
 667                 val = gl518_read_value(client, GL518_REG_MISC);
 668                 data->fan_div[0] = (val >> 6) & 0x03;
 669                 data->fan_div[1] = (val >> 4) & 0x03;
 670                 data->fan_auto1  = (val >> 3) & 0x01;
 671
 672                 data->alarms &= data->alarm_mask;
 673
 674                 val = gl518_read_value(client, GL518_REG_CONF);
 675                 data->beep_enable = (val >> 2) & 1;
 676
 677                 if (data->type != gl518sm_r00) {
 678                         data->voltage_in[0] =
 679                             gl518_read_value(client, GL518_REG_VDD);
 680                         data->voltage_in[1] =
 681                             gl518_read_value(client, GL518_REG_VIN1);
 682                         data->voltage_in[2] =
 683                             gl518_read_value(client, GL518_REG_VIN2);
 684                 }
 685                 data->voltage_in[3] =
 686                     gl518_read_value(client, GL518_REG_VIN3);
 687
 688                 data->last_updated = jiffies;
 689                 data->valid = 1;
 690         }
 691
 692         mutex_unlock(&data->update_lock);
 693
 694         return data;
 695 }
 696
 697 static int __init sensors_gl518sm_init(void)
 698 {
 699         return i2c_add_driver(&gl518_driver);
 700 }
 701
 702 static void __exit sensors_gl518sm_exit(void)
 703 {
 704         i2c_del_driver(&gl518_driver);
 705 }
 706
 707 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 708         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
 709         "Hong-Gunn Chew <hglinux@gunnet.org>");
 710 MODULE_DESCRIPTION("GL518SM driver");
 711 MODULE_LICENSE("GPL");
 712
 713 module_init(sensors_gl518sm_init);
 714 module_exit(sensors_gl518sm_exit);