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 <jdelvare@suse.de>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
  24  * and advice of Greg Kroah-Hartman.
  25  *
  26  * Notes about the port:
  27  * Release 0x00 of the GL518SM chipset doesn't support reading of in0,
  28  * in1 nor in2. The original driver had an ugly workaround to get them
  29  * anyway (changing limits and watching alarms trigger and wear off).
  30  * We did not keep that part of the original driver in the Linux 2.6
  31  * version, since it was making the driver significantly more complex
  32  * with no real benefit.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/slab.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/i2c.h>
  40 #include <linux/hwmon.h>
  41 #include <linux/hwmon-sysfs.h>
  42 #include <linux/err.h>
  43 #include <linux/mutex.h>
  44 #include <linux/sysfs.h>
  45
  46 /* Addresses to scan */
  47 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  48
  49 enum chips { gl518sm_r00, gl518sm_r80 };
  50
  51 /* Many GL518 constants specified below */
  52
  53 /* The GL518 registers */
  54 #define GL518_REG_CHIP_ID       0x00
  55 #define GL518_REG_REVISION      0x01
  56 #define GL518_REG_VENDOR_ID     0x02
  57 #define GL518_REG_CONF          0x03
  58 #define GL518_REG_TEMP_IN       0x04
  59 #define GL518_REG_TEMP_MAX      0x05
  60 #define GL518_REG_TEMP_HYST     0x06
  61 #define GL518_REG_FAN_COUNT     0x07
  62 #define GL518_REG_FAN_LIMIT     0x08
  63 #define GL518_REG_VIN1_LIMIT    0x09
  64 #define GL518_REG_VIN2_LIMIT    0x0a
  65 #define GL518_REG_VIN3_LIMIT    0x0b
  66 #define GL518_REG_VDD_LIMIT     0x0c
  67 #define GL518_REG_VIN3          0x0d
  68 #define GL518_REG_MISC          0x0f
  69 #define GL518_REG_ALARM         0x10
  70 #define GL518_REG_MASK          0x11
  71 #define GL518_REG_INT           0x12
  72 #define GL518_REG_VIN2          0x13
  73 #define GL518_REG_VIN1          0x14
  74 #define GL518_REG_VDD           0x15
  75
  76
  77 /*
  78  * Conversions. Rounding and limit checking is only done on the TO_REG
  79  * variants. Note that you should be a bit careful with which arguments
  80  * these macros are called: arguments may be evaluated more than once.
  81  * Fixing this is just not worth it.
  82  */
  83
  84 #define RAW_FROM_REG(val)       val
  85
  86 #define BOOL_FROM_REG(val)      ((val) ? 0 : 1)
  87 #define BOOL_TO_REG(val)        ((val) ? 0 : 1)
  88
  89 #define TEMP_CLAMP(val)         clamp_val(val, -119000, 136000)
  90 #define TEMP_TO_REG(val)        (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 119)
  91 #define TEMP_FROM_REG(val)      (((val) - 119) * 1000)
  92
  93 static inline u8 FAN_TO_REG(long rpm, int div)
  94 {
  95         long rpmdiv;
  96         if (rpm == 0)
  97                 return 0;
  98         rpmdiv = clamp_val(rpm, 1, 960000) * div;
  99         return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
 100 }
 101 #define FAN_FROM_REG(val, div)  ((val) == 0 ? 0 : (480000 / ((val) * (div))))
 102
 103 #define IN_CLAMP(val)           clamp_val(val, 0, 255 * 19)
 104 #define IN_TO_REG(val)          DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
 105 #define IN_FROM_REG(val)        ((val) * 19)
 106
 107 #define VDD_CLAMP(val)          clamp_val(val, 0, 255 * 95 / 4)
 108 #define VDD_TO_REG(val)         DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
 109 #define VDD_FROM_REG(val)       DIV_ROUND_CLOSEST((val) * 95, 4)
 110
 111 #define DIV_FROM_REG(val)       (1 << (val))
 112
 113 #define BEEP_MASK_TO_REG(val)   ((val) & 0x7f & data->alarm_mask)
 114 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
 115
 116 /* Each client has this additional data */
 117 struct gl518_data {
 118         struct i2c_client *client;
 119         const struct attribute_group *groups[3];
 120         enum chips type;
 121
 122         struct mutex update_lock;
 123         char valid;             /* !=0 if following fields are valid */
 124         unsigned long last_updated;     /* In jiffies */
 125
 126         u8 voltage_in[4];       /* Register values; [0] = VDD */
 127         u8 voltage_min[4];      /* Register values; [0] = VDD */
 128         u8 voltage_max[4];      /* Register values; [0] = VDD */
 129         u8 fan_in[2];
 130         u8 fan_min[2];
 131         u8 fan_div[2];          /* Register encoding, shifted right */
 132         u8 fan_auto1;           /* Boolean */
 133         u8 temp_in;             /* Register values */
 134         u8 temp_max;            /* Register values */
 135         u8 temp_hyst;           /* Register values */
 136         u8 alarms;              /* Register value */
 137         u8 alarm_mask;
 138         u8 beep_mask;           /* Register value */
 139         u8 beep_enable;         /* Boolean */
 140 };
 141
 142 /*
 143  * Registers 0x07 to 0x0c are word-sized, others are byte-sized
 144  * GL518 uses a high-byte first convention, which is exactly opposite to
 145  * the SMBus standard.
 146  */
 147 static int gl518_read_value(struct i2c_client *client, u8 reg)
 148 {
 149         if ((reg >= 0x07) && (reg <= 0x0c))
 150                 return i2c_smbus_read_word_swapped(client, reg);
 151         else
 152                 return i2c_smbus_read_byte_data(client, reg);
 153 }
 154
 155 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
 156 {
 157         if ((reg >= 0x07) && (reg <= 0x0c))
 158                 return i2c_smbus_write_word_swapped(client, reg, value);
 159         else
 160                 return i2c_smbus_write_byte_data(client, reg, value);
 161 }
 162
 163 static struct gl518_data *gl518_update_device(struct device *dev)
 164 {
 165         struct gl518_data *data = dev_get_drvdata(dev);
 166         struct i2c_client *client = data->client;
 167         int val;
 168
 169         mutex_lock(&data->update_lock);
 170
 171         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 172             || !data->valid) {
 173                 dev_dbg(&client->dev, "Starting gl518 update\n");
 174
 175                 data->alarms = gl518_read_value(client, GL518_REG_INT);
 176                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 177
 178                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
 179                 data->voltage_min[0] = val & 0xff;
 180                 data->voltage_max[0] = (val >> 8) & 0xff;
 181                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
 182                 data->voltage_min[1] = val & 0xff;
 183                 data->voltage_max[1] = (val >> 8) & 0xff;
 184                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
 185                 data->voltage_min[2] = val & 0xff;
 186                 data->voltage_max[2] = (val >> 8) & 0xff;
 187                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
 188                 data->voltage_min[3] = val & 0xff;
 189                 data->voltage_max[3] = (val >> 8) & 0xff;
 190
 191                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
 192                 data->fan_in[0] = (val >> 8) & 0xff;
 193                 data->fan_in[1] = val & 0xff;
 194
 195                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 196                 data->fan_min[0] = (val >> 8) & 0xff;
 197                 data->fan_min[1] = val & 0xff;
 198
 199                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
 200                 data->temp_max =
 201                     gl518_read_value(client, GL518_REG_TEMP_MAX);
 202                 data->temp_hyst =
 203                     gl518_read_value(client, GL518_REG_TEMP_HYST);
 204
 205                 val = gl518_read_value(client, GL518_REG_MISC);
 206                 data->fan_div[0] = (val >> 6) & 0x03;
 207                 data->fan_div[1] = (val >> 4) & 0x03;
 208                 data->fan_auto1  = (val >> 3) & 0x01;
 209
 210                 data->alarms &= data->alarm_mask;
 211
 212                 val = gl518_read_value(client, GL518_REG_CONF);
 213                 data->beep_enable = (val >> 2) & 1;
 214
 215                 if (data->type != gl518sm_r00) {
 216                         data->voltage_in[0] =
 217                             gl518_read_value(client, GL518_REG_VDD);
 218                         data->voltage_in[1] =
 219                             gl518_read_value(client, GL518_REG_VIN1);
 220                         data->voltage_in[2] =
 221                             gl518_read_value(client, GL518_REG_VIN2);
 222                 }
 223                 data->voltage_in[3] =
 224                     gl518_read_value(client, GL518_REG_VIN3);
 225
 226                 data->last_updated = jiffies;
 227                 data->valid = 1;
 228         }
 229
 230         mutex_unlock(&data->update_lock);
 231
 232         return data;
 233 }
 234
 235 /*
 236  * Sysfs stuff
 237  */
 238
 239 #define show(type, suffix, value)                                       \
 240 static ssize_t show_##suffix(struct device *dev,                        \
 241                              struct device_attribute *attr, char *buf)  \
 242 {                                                                       \
 243         struct gl518_data *data = gl518_update_device(dev);             \
 244         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
 245 }
 246
 247 show(TEMP, temp_input1, temp_in);
 248 show(TEMP, temp_max1, temp_max);
 249 show(TEMP, temp_hyst1, temp_hyst);
 250 show(BOOL, fan_auto1, fan_auto1);
 251 show(VDD, in_input0, voltage_in[0]);
 252 show(IN, in_input1, voltage_in[1]);
 253 show(IN, in_input2, voltage_in[2]);
 254 show(IN, in_input3, voltage_in[3]);
 255 show(VDD, in_min0, voltage_min[0]);
 256 show(IN, in_min1, voltage_min[1]);
 257 show(IN, in_min2, voltage_min[2]);
 258 show(IN, in_min3, voltage_min[3]);
 259 show(VDD, in_max0, voltage_max[0]);
 260 show(IN, in_max1, voltage_max[1]);
 261 show(IN, in_max2, voltage_max[2]);
 262 show(IN, in_max3, voltage_max[3]);
 263 show(RAW, alarms, alarms);
 264 show(BOOL, beep_enable, beep_enable);
 265 show(BEEP_MASK, beep_mask, beep_mask);
 266
 267 static ssize_t show_fan_input(struct device *dev,
 268                               struct device_attribute *attr, char *buf)
 269 {
 270         int nr = to_sensor_dev_attr(attr)->index;
 271         struct gl518_data *data = gl518_update_device(dev);
 272         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
 273                                         DIV_FROM_REG(data->fan_div[nr])));
 274 }
 275
 276 static ssize_t show_fan_min(struct device *dev,
 277                             struct device_attribute *attr, char *buf)
 278 {
 279         int nr = to_sensor_dev_attr(attr)->index;
 280         struct gl518_data *data = gl518_update_device(dev);
 281         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 282                                         DIV_FROM_REG(data->fan_div[nr])));
 283 }
 284
 285 static ssize_t show_fan_div(struct device *dev,
 286                             struct device_attribute *attr, char *buf)
 287 {
 288         int nr = to_sensor_dev_attr(attr)->index;
 289         struct gl518_data *data = gl518_update_device(dev);
 290         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 291 }
 292
 293 #define set(type, suffix, value, reg)                                   \
 294 static ssize_t set_##suffix(struct device *dev,                         \
 295                             struct device_attribute *attr,              \
 296                             const char *buf, size_t count)              \
 297 {                                                                       \
 298         struct gl518_data *data = dev_get_drvdata(dev);                 \
 299         struct i2c_client *client = data->client;                       \
 300         long val;                                                       \
 301         int err = kstrtol(buf, 10, &val);                               \
 302         if (err)                                                        \
 303                 return err;                                             \
 304                                                                         \
 305         mutex_lock(&data->update_lock);                                 \
 306         data->value = type##_TO_REG(val);                               \
 307         gl518_write_value(client, reg, data->value);                    \
 308         mutex_unlock(&data->update_lock);                               \
 309         return count;                                                   \
 310 }
 311
 312 #define set_bits(type, suffix, value, reg, mask, shift)                 \
 313 static ssize_t set_##suffix(struct device *dev,                         \
 314                             struct device_attribute *attr,              \
 315                             const char *buf, size_t count)              \
 316 {                                                                       \
 317         struct gl518_data *data = dev_get_drvdata(dev);                 \
 318         struct i2c_client *client = data->client;                       \
 319         int regvalue;                                                   \
 320         unsigned long val;                                              \
 321         int err = kstrtoul(buf, 10, &val);                              \
 322         if (err)                                                        \
 323                 return err;                                             \
 324                                                                         \
 325         mutex_lock(&data->update_lock);                                 \
 326         regvalue = gl518_read_value(client, reg);                       \
 327         data->value = type##_TO_REG(val);                               \
 328         regvalue = (regvalue & ~mask) | (data->value << shift);         \
 329         gl518_write_value(client, reg, regvalue);                       \
 330         mutex_unlock(&data->update_lock);                               \
 331         return count;                                                   \
 332 }
 333
 334 #define set_low(type, suffix, value, reg)                               \
 335         set_bits(type, suffix, value, reg, 0x00ff, 0)
 336 #define set_high(type, suffix, value, reg)                              \
 337         set_bits(type, suffix, value, reg, 0xff00, 8)
 338
 339 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
 340 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
 341 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
 342 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
 343 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
 344 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
 345 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
 346 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
 347 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
 348 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
 349 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
 350 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
 351 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
 352
 353 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 354                            const char *buf, size_t count)
 355 {
 356         struct gl518_data *data = dev_get_drvdata(dev);
 357         struct i2c_client *client = data->client;
 358         int nr = to_sensor_dev_attr(attr)->index;
 359         int regvalue;
 360         unsigned long val;
 361         int err;
 362
 363         err = kstrtoul(buf, 10, &val);
 364         if (err)
 365                 return err;
 366
 367         mutex_lock(&data->update_lock);
 368         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
 369         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 370         regvalue = (regvalue & (0xff << (8 * nr)))
 371                  | (data->fan_min[nr] << (8 * (1 - nr)));
 372         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
 373
 374         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 375         if (data->fan_min[nr] == 0)
 376                 data->alarm_mask &= ~(0x20 << nr);
 377         else
 378                 data->alarm_mask |= (0x20 << nr);
 379         data->beep_mask &= data->alarm_mask;
 380         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 381
 382         mutex_unlock(&data->update_lock);
 383         return count;
 384 }
 385
 386 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 387                            const char *buf, size_t count)
 388 {
 389         struct gl518_data *data = dev_get_drvdata(dev);
 390         struct i2c_client *client = data->client;
 391         int nr = to_sensor_dev_attr(attr)->index;
 392         int regvalue;
 393         unsigned long val;
 394         int err;
 395
 396         err = kstrtoul(buf, 10, &val);
 397         if (err)
 398                 return err;
 399
 400         switch (val) {
 401         case 1:
 402                 val = 0;
 403                 break;
 404         case 2:
 405                 val = 1;
 406                 break;
 407         case 4:
 408                 val = 2;
 409                 break;
 410         case 8:
 411                 val = 3;
 412                 break;
 413         default:
 414                 dev_err(dev,
 415                         "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n",
 416                         val);
 417                 return -EINVAL;
 418         }
 419
 420         mutex_lock(&data->update_lock);
 421         regvalue = gl518_read_value(client, GL518_REG_MISC);
 422         data->fan_div[nr] = val;
 423         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
 424                  | (data->fan_div[nr] << (6 - 2 * nr));
 425         gl518_write_value(client, GL518_REG_MISC, regvalue);
 426         mutex_unlock(&data->update_lock);
 427         return count;
 428 }
 429
 430 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
 431 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
 432 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
 433         show_temp_hyst1, set_temp_hyst1);
 434 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
 435 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
 436 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
 437 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
 438         show_fan_min, set_fan_min, 0);
 439 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
 440         show_fan_min, set_fan_min, 1);
 441 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
 442         show_fan_div, set_fan_div, 0);
 443 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
 444         show_fan_div, set_fan_div, 1);
 445 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
 446 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
 447 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
 448 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
 449 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
 450 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
 451 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
 452 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
 453 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
 454 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
 455 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
 456 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
 457 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 458 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
 459         show_beep_enable, set_beep_enable);
 460 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
 461         show_beep_mask, set_beep_mask);
 462
 463 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 464                           char *buf)
 465 {
 466         int bitnr = to_sensor_dev_attr(attr)->index;
 467         struct gl518_data *data = gl518_update_device(dev);
 468         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 469 }
 470
 471 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 472 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 473 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 474 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 475 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 476 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
 477 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
 478
 479 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
 480                           char *buf)
 481 {
 482         int bitnr = to_sensor_dev_attr(attr)->index;
 483         struct gl518_data *data = gl518_update_device(dev);
 484         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
 485 }
 486
 487 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 488                         const char *buf, size_t count)
 489 {
 490         struct gl518_data *data = dev_get_drvdata(dev);
 491         struct i2c_client *client = data->client;
 492         int bitnr = to_sensor_dev_attr(attr)->index;
 493         unsigned long bit;
 494         int err;
 495
 496         err = kstrtoul(buf, 10, &bit);
 497         if (err)
 498                 return err;
 499
 500         if (bit & ~1)
 501                 return -EINVAL;
 502
 503         mutex_lock(&data->update_lock);
 504         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
 505         if (bit)
 506                 data->beep_mask |= (1 << bitnr);
 507         else
 508                 data->beep_mask &= ~(1 << bitnr);
 509         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
 510         mutex_unlock(&data->update_lock);
 511         return count;
 512 }
 513
 514 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
 515 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
 516 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
 517 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
 518 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
 519 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
 520 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
 521
 522 static struct attribute *gl518_attributes[] = {
 523         &dev_attr_in3_input.attr,
 524         &dev_attr_in0_min.attr,
 525         &dev_attr_in1_min.attr,
 526         &dev_attr_in2_min.attr,
 527         &dev_attr_in3_min.attr,
 528         &dev_attr_in0_max.attr,
 529         &dev_attr_in1_max.attr,
 530         &dev_attr_in2_max.attr,
 531         &dev_attr_in3_max.attr,
 532         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 533         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 534         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 535         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 536         &sensor_dev_attr_in0_beep.dev_attr.attr,
 537         &sensor_dev_attr_in1_beep.dev_attr.attr,
 538         &sensor_dev_attr_in2_beep.dev_attr.attr,
 539         &sensor_dev_attr_in3_beep.dev_attr.attr,
 540
 541         &dev_attr_fan1_auto.attr,
 542         &sensor_dev_attr_fan1_input.dev_attr.attr,
 543         &sensor_dev_attr_fan2_input.dev_attr.attr,
 544         &sensor_dev_attr_fan1_min.dev_attr.attr,
 545         &sensor_dev_attr_fan2_min.dev_attr.attr,
 546         &sensor_dev_attr_fan1_div.dev_attr.attr,
 547         &sensor_dev_attr_fan2_div.dev_attr.attr,
 548         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 549         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 550         &sensor_dev_attr_fan1_beep.dev_attr.attr,
 551         &sensor_dev_attr_fan2_beep.dev_attr.attr,
 552
 553         &dev_attr_temp1_input.attr,
 554         &dev_attr_temp1_max.attr,
 555         &dev_attr_temp1_max_hyst.attr,
 556         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 557         &sensor_dev_attr_temp1_beep.dev_attr.attr,
 558
 559         &dev_attr_alarms.attr,
 560         &dev_attr_beep_enable.attr,
 561         &dev_attr_beep_mask.attr,
 562         NULL
 563 };
 564
 565 static const struct attribute_group gl518_group = {
 566         .attrs = gl518_attributes,
 567 };
 568
 569 static struct attribute *gl518_attributes_r80[] = {
 570         &dev_attr_in0_input.attr,
 571         &dev_attr_in1_input.attr,
 572         &dev_attr_in2_input.attr,
 573         NULL
 574 };
 575
 576 static const struct attribute_group gl518_group_r80 = {
 577         .attrs = gl518_attributes_r80,
 578 };
 579
 580 /*
 581  * Real code
 582  */
 583
 584 /* Return 0 if detection is successful, -ENODEV otherwise */
 585 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
 586 {
 587         struct i2c_adapter *adapter = client->adapter;
 588         int rev;
 589
 590         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 591                                      I2C_FUNC_SMBUS_WORD_DATA))
 592                 return -ENODEV;
 593
 594         /* Now, we do the remaining detection. */
 595         if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
 596          || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
 597                 return -ENODEV;
 598
 599         /* Determine the chip type. */
 600         rev = gl518_read_value(client, GL518_REG_REVISION);
 601         if (rev != 0x00 && rev != 0x80)
 602                 return -ENODEV;
 603
 604         strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
 605
 606         return 0;
 607 }
 608
 609 /*
 610  * Called when we have found a new GL518SM.
 611  * Note that we preserve D4:NoFan2 and D2:beep_enable.
 612  */
 613 static void gl518_init_client(struct i2c_client *client)
 614 {
 615         /* Make sure we leave D7:Reset untouched */
 616         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
 617
 618         /* Comparator mode (D3=0), standby mode (D6=0) */
 619         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
 620
 621         /* Never interrupts */
 622         gl518_write_value(client, GL518_REG_MASK, 0x00);
 623
 624         /* Clear status register (D5=1), start (D6=1) */
 625         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
 626         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
 627 }
 628
 629 static int gl518_probe(struct i2c_client *client,
 630                        const struct i2c_device_id *id)
 631 {
 632         struct device *dev = &client->dev;
 633         struct device *hwmon_dev;
 634         struct gl518_data *data;
 635         int revision;
 636
 637         data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL);
 638         if (!data)
 639                 return -ENOMEM;
 640
 641         data->client = client;
 642         revision = gl518_read_value(client, GL518_REG_REVISION);
 643         data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
 644         mutex_init(&data->update_lock);
 645
 646         /* Initialize the GL518SM chip */
 647         data->alarm_mask = 0xff;
 648         gl518_init_client(client);
 649
 650         /* sysfs hooks */
 651         data->groups[0] = &gl518_group;
 652         if (data->type == gl518sm_r80)
 653                 data->groups[1] = &gl518_group_r80;
 654
 655         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 656                                                            data, data->groups);
 657         return PTR_ERR_OR_ZERO(hwmon_dev);
 658 }
 659
 660 static const struct i2c_device_id gl518_id[] = {
 661         { "gl518sm", 0 },
 662         { }
 663 };
 664 MODULE_DEVICE_TABLE(i2c, gl518_id);
 665
 666 static struct i2c_driver gl518_driver = {
 667         .class          = I2C_CLASS_HWMON,
 668         .driver = {
 669                 .name   = "gl518sm",
 670         },
 671         .probe          = gl518_probe,
 672         .id_table       = gl518_id,
 673         .detect         = gl518_detect,
 674         .address_list   = normal_i2c,
 675 };
 676
 677 module_i2c_driver(gl518_driver);
 678
 679 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 680         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
 681         "Hong-Gunn Chew <hglinux@gunnet.org>");
 682 MODULE_DESCRIPTION("GL518SM driver");
 683 MODULE_LICENSE("GPL");