drivers/hwmon/fscher.c

   1 /*
   2  * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
   3  * monitoring
   4  * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /*
  22  *  fujitsu siemens hermes chip,
  23  *  module based on fscpos.c
  24  *  Copyright (C) 2000 Hermann Jung <hej@odn.de>
  25  *  Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
  26  *  and Philip Edelbrock <phil@netroedge.com>
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/jiffies.h>
  33 #include <linux/i2c.h>
  34 #include <linux/hwmon.h>
  35 #include <linux/err.h>
  36 #include <linux/mutex.h>
  37 #include <linux/sysfs.h>
  38
  39 /*
  40  * Addresses to scan
  41  */
  42
  43 static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  44
  45 /*
  46  * Insmod parameters
  47  */
  48
  49 I2C_CLIENT_INSMOD_1(fscher);
  50
  51 /*
  52  * The FSCHER registers
  53  */
  54
  55 /* chip identification */
  56 #define FSCHER_REG_IDENT_0              0x00
  57 #define FSCHER_REG_IDENT_1              0x01
  58 #define FSCHER_REG_IDENT_2              0x02
  59 #define FSCHER_REG_REVISION             0x03
  60
  61 /* global control and status */
  62 #define FSCHER_REG_EVENT_STATE          0x04
  63 #define FSCHER_REG_CONTROL              0x05
  64
  65 /* watchdog */
  66 #define FSCHER_REG_WDOG_PRESET          0x28
  67 #define FSCHER_REG_WDOG_STATE           0x23
  68 #define FSCHER_REG_WDOG_CONTROL         0x21
  69
  70 /* fan 0 */
  71 #define FSCHER_REG_FAN0_MIN             0x55
  72 #define FSCHER_REG_FAN0_ACT             0x0e
  73 #define FSCHER_REG_FAN0_STATE           0x0d
  74 #define FSCHER_REG_FAN0_RIPPLE          0x0f
  75
  76 /* fan 1 */
  77 #define FSCHER_REG_FAN1_MIN             0x65
  78 #define FSCHER_REG_FAN1_ACT             0x6b
  79 #define FSCHER_REG_FAN1_STATE           0x62
  80 #define FSCHER_REG_FAN1_RIPPLE          0x6f
  81
  82 /* fan 2 */
  83 #define FSCHER_REG_FAN2_MIN             0xb5
  84 #define FSCHER_REG_FAN2_ACT             0xbb
  85 #define FSCHER_REG_FAN2_STATE           0xb2
  86 #define FSCHER_REG_FAN2_RIPPLE          0xbf
  87
  88 /* voltage supervision */
  89 #define FSCHER_REG_VOLT_12              0x45
  90 #define FSCHER_REG_VOLT_5               0x42
  91 #define FSCHER_REG_VOLT_BATT            0x48
  92
  93 /* temperature 0 */
  94 #define FSCHER_REG_TEMP0_ACT            0x64
  95 #define FSCHER_REG_TEMP0_STATE          0x71
  96
  97 /* temperature 1 */
  98 #define FSCHER_REG_TEMP1_ACT            0x32
  99 #define FSCHER_REG_TEMP1_STATE          0x81
 100
 101 /* temperature 2 */
 102 #define FSCHER_REG_TEMP2_ACT            0x35
 103 #define FSCHER_REG_TEMP2_STATE          0x91
 104
 105 /*
 106  * Functions declaration
 107  */
 108
 109 static int fscher_probe(struct i2c_client *client,
 110                         const struct i2c_device_id *id);
 111 static int fscher_detect(struct i2c_client *client, int kind,
 112                          struct i2c_board_info *info);
 113 static int fscher_remove(struct i2c_client *client);
 114 static struct fscher_data *fscher_update_device(struct device *dev);
 115 static void fscher_init_client(struct i2c_client *client);
 116
 117 static int fscher_read_value(struct i2c_client *client, u8 reg);
 118 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
 119
 120 /*
 121  * Driver data (common to all clients)
 122  */
 123
 124 static const struct i2c_device_id fscher_id[] = {
 125         { "fscher", fscher },
 126         { }
 127 };
 128
 129 static struct i2c_driver fscher_driver = {
 130         .class          = I2C_CLASS_HWMON,
 131         .driver = {
 132                 .name   = "fscher",
 133         },
 134         .probe          = fscher_probe,
 135         .remove         = fscher_remove,
 136         .id_table       = fscher_id,
 137         .detect         = fscher_detect,
 138         .address_data   = &addr_data,
 139 };
 140
 141 /*
 142  * Client data (each client gets its own)
 143  */
 144
 145 struct fscher_data {
 146         struct device *hwmon_dev;
 147         struct mutex update_lock;
 148         char valid; /* zero until following fields are valid */
 149         unsigned long last_updated; /* in jiffies */
 150
 151         /* register values */
 152         u8 revision;            /* revision of chip */
 153         u8 global_event;        /* global event status */
 154         u8 global_control;      /* global control register */
 155         u8 watchdog[3];         /* watchdog */
 156         u8 volt[3];             /* 12, 5, battery voltage */
 157         u8 temp_act[3];         /* temperature */
 158         u8 temp_status[3];      /* status of sensor */
 159         u8 fan_act[3];          /* fans revolutions per second */
 160         u8 fan_status[3];       /* fan status */
 161         u8 fan_min[3];          /* fan min value for rps */
 162         u8 fan_ripple[3];       /* divider for rps */
 163 };
 164
 165 /*
 166  * Sysfs stuff
 167  */
 168
 169 #define sysfs_r(kind, sub, offset, reg) \
 170 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
 171 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
 172 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
 173 { \
 174         struct fscher_data *data = fscher_update_device(dev); \
 175         return show_##kind##sub(data, buf, (offset)); \
 176 }
 177
 178 #define sysfs_w(kind, sub, offset, reg) \
 179 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
 180 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
 181 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 182 { \
 183         struct i2c_client *client = to_i2c_client(dev); \
 184         struct fscher_data *data = i2c_get_clientdata(client); \
 185         return set_##kind##sub(client, data, buf, count, (offset), reg); \
 186 }
 187
 188 #define sysfs_rw_n(kind, sub, offset, reg) \
 189 sysfs_r(kind, sub, offset, reg) \
 190 sysfs_w(kind, sub, offset, reg) \
 191 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
 192
 193 #define sysfs_rw(kind, sub, reg) \
 194 sysfs_r(kind, sub, 0, reg) \
 195 sysfs_w(kind, sub, 0, reg) \
 196 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
 197
 198 #define sysfs_ro_n(kind, sub, offset, reg) \
 199 sysfs_r(kind, sub, offset, reg) \
 200 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
 201
 202 #define sysfs_ro(kind, sub, reg) \
 203 sysfs_r(kind, sub, 0, reg) \
 204 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
 205
 206 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
 207 sysfs_rw_n(pwm,        , offset, reg_min) \
 208 sysfs_rw_n(fan, _status, offset, reg_status) \
 209 sysfs_rw_n(fan, _div   , offset, reg_ripple) \
 210 sysfs_ro_n(fan, _input , offset, reg_act)
 211
 212 #define sysfs_temp(offset, reg_status, reg_act) \
 213 sysfs_rw_n(temp, _status, offset, reg_status) \
 214 sysfs_ro_n(temp, _input , offset, reg_act)
 215
 216 #define sysfs_in(offset, reg_act) \
 217 sysfs_ro_n(in, _input, offset, reg_act)
 218
 219 #define sysfs_revision(reg_revision) \
 220 sysfs_ro(revision, , reg_revision)
 221
 222 #define sysfs_alarms(reg_events) \
 223 sysfs_ro(alarms, , reg_events)
 224
 225 #define sysfs_control(reg_control) \
 226 sysfs_rw(control, , reg_control)
 227
 228 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
 229 sysfs_rw(watchdog, _control, reg_control) \
 230 sysfs_rw(watchdog, _status , reg_status) \
 231 sysfs_rw(watchdog, _preset , reg_preset)
 232
 233 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
 234              FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
 235 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
 236              FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
 237 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
 238              FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
 239
 240 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
 241 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
 242 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
 243
 244 sysfs_in(0, FSCHER_REG_VOLT_12)
 245 sysfs_in(1, FSCHER_REG_VOLT_5)
 246 sysfs_in(2, FSCHER_REG_VOLT_BATT)
 247
 248 sysfs_revision(FSCHER_REG_REVISION)
 249 sysfs_alarms(FSCHER_REG_EVENTS)
 250 sysfs_control(FSCHER_REG_CONTROL)
 251 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
 252
 253 static struct attribute *fscher_attributes[] = {
 254         &dev_attr_revision.attr,
 255         &dev_attr_alarms.attr,
 256         &dev_attr_control.attr,
 257
 258         &dev_attr_watchdog_status.attr,
 259         &dev_attr_watchdog_control.attr,
 260         &dev_attr_watchdog_preset.attr,
 261
 262         &dev_attr_in0_input.attr,
 263         &dev_attr_in1_input.attr,
 264         &dev_attr_in2_input.attr,
 265
 266         &dev_attr_fan1_status.attr,
 267         &dev_attr_fan1_div.attr,
 268         &dev_attr_fan1_input.attr,
 269         &dev_attr_pwm1.attr,
 270         &dev_attr_fan2_status.attr,
 271         &dev_attr_fan2_div.attr,
 272         &dev_attr_fan2_input.attr,
 273         &dev_attr_pwm2.attr,
 274         &dev_attr_fan3_status.attr,
 275         &dev_attr_fan3_div.attr,
 276         &dev_attr_fan3_input.attr,
 277         &dev_attr_pwm3.attr,
 278
 279         &dev_attr_temp1_status.attr,
 280         &dev_attr_temp1_input.attr,
 281         &dev_attr_temp2_status.attr,
 282         &dev_attr_temp2_input.attr,
 283         &dev_attr_temp3_status.attr,
 284         &dev_attr_temp3_input.attr,
 285         NULL
 286 };
 287
 288 static const struct attribute_group fscher_group = {
 289         .attrs = fscher_attributes,
 290 };
 291
 292 /*
 293  * Real code
 294  */
 295
 296 /* Return 0 if detection is successful, -ENODEV otherwise */
 297 static int fscher_detect(struct i2c_client *new_client, int kind,
 298                          struct i2c_board_info *info)
 299 {
 300         struct i2c_adapter *adapter = new_client->adapter;
 301
 302         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 303                 return -ENODEV;
 304
 305         /* Do the remaining detection unless force or force_fscher parameter */
 306         if (kind < 0) {
 307                 if ((i2c_smbus_read_byte_data(new_client,
 308                      FSCHER_REG_IDENT_0) != 0x48)       /* 'H' */
 309                  || (i2c_smbus_read_byte_data(new_client,
 310                      FSCHER_REG_IDENT_1) != 0x45)       /* 'E' */
 311                  || (i2c_smbus_read_byte_data(new_client,
 312                      FSCHER_REG_IDENT_2) != 0x52))      /* 'R' */
 313                         return -ENODEV;
 314         }
 315
 316         strlcpy(info->type, "fscher", I2C_NAME_SIZE);
 317
 318         return 0;
 319 }
 320
 321 static int fscher_probe(struct i2c_client *new_client,
 322                         const struct i2c_device_id *id)
 323 {
 324         struct fscher_data *data;
 325         int err;
 326
 327         data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL);
 328         if (!data) {
 329                 err = -ENOMEM;
 330                 goto exit;
 331         }
 332
 333         i2c_set_clientdata(new_client, data);
 334         data->valid = 0;
 335         mutex_init(&data->update_lock);
 336
 337         fscher_init_client(new_client);
 338
 339         /* Register sysfs hooks */
 340         if ((err = sysfs_create_group(&new_client->dev.kobj, &fscher_group)))
 341                 goto exit_free;
 342
 343         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 344         if (IS_ERR(data->hwmon_dev)) {
 345                 err = PTR_ERR(data->hwmon_dev);
 346                 goto exit_remove_files;
 347         }
 348
 349         return 0;
 350
 351 exit_remove_files:
 352         sysfs_remove_group(&new_client->dev.kobj, &fscher_group);
 353 exit_free:
 354         kfree(data);
 355 exit:
 356         return err;
 357 }
 358
 359 static int fscher_remove(struct i2c_client *client)
 360 {
 361         struct fscher_data *data = i2c_get_clientdata(client);
 362
 363         hwmon_device_unregister(data->hwmon_dev);
 364         sysfs_remove_group(&client->dev.kobj, &fscher_group);
 365
 366         kfree(data);
 367         return 0;
 368 }
 369
 370 static int fscher_read_value(struct i2c_client *client, u8 reg)
 371 {
 372         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 373
 374         return i2c_smbus_read_byte_data(client, reg);
 375 }
 376
 377 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 378 {
 379         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 380                 reg, value);
 381
 382         return i2c_smbus_write_byte_data(client, reg, value);
 383 }
 384
 385 /* Called when we have found a new FSC Hermes. */
 386 static void fscher_init_client(struct i2c_client *client)
 387 {
 388         struct fscher_data *data = i2c_get_clientdata(client);
 389
 390         /* Read revision from chip */
 391         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 392 }
 393
 394 static struct fscher_data *fscher_update_device(struct device *dev)
 395 {
 396         struct i2c_client *client = to_i2c_client(dev);
 397         struct fscher_data *data = i2c_get_clientdata(client);
 398
 399         mutex_lock(&data->update_lock);
 400
 401         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 402
 403                 dev_dbg(&client->dev, "Starting fscher update\n");
 404
 405                 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
 406                 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
 407                 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
 408                 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
 409                 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
 410                 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
 411
 412                 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
 413                 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
 414                 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
 415
 416                 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
 417                 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
 418                 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
 419                 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
 420                 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
 421                 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
 422                 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
 423                 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
 424                 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
 425                 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
 426                 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
 427                 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
 428
 429                 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
 430                 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
 431                 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
 432
 433                 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
 434                 data->global_control = fscher_read_value(client,
 435                                                         FSCHER_REG_CONTROL);
 436
 437                 data->last_updated = jiffies;
 438                 data->valid = 1;
 439         }
 440
 441         mutex_unlock(&data->update_lock);
 442
 443         return data;
 444 }
 445
 446
 447
 448 #define FAN_INDEX_FROM_NUM(nr)  ((nr) - 1)
 449
 450 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
 451                               const char *buf, size_t count, int nr, int reg)
 452 {
 453         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 454         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
 455
 456         mutex_lock(&data->update_lock);
 457         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 458         fscher_write_value(client, reg, v);
 459         mutex_unlock(&data->update_lock);
 460         return count;
 461 }
 462
 463 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
 464 {
 465         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 466         return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
 467 }
 468
 469 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
 470                        const char *buf, size_t count, int nr, int reg)
 471 {
 472         unsigned long v = simple_strtoul(buf, NULL, 10);
 473
 474         mutex_lock(&data->update_lock);
 475         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
 476         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 477         mutex_unlock(&data->update_lock);
 478         return count;
 479 }
 480
 481 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
 482 {
 483         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 484 }
 485
 486 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 487                            const char *buf, size_t count, int nr, int reg)
 488 {
 489         /* supported values: 2, 4, 8 */
 490         unsigned long v = simple_strtoul(buf, NULL, 10);
 491
 492         switch (v) {
 493         case 2: v = 1; break;
 494         case 4: v = 2; break;
 495         case 8: v = 3; break;
 496         default:
 497                 dev_err(&client->dev, "fan_div value %ld not "
 498                          "supported. Choose one of 2, 4 or 8!\n", v);
 499                 return -EINVAL;
 500         }
 501
 502         mutex_lock(&data->update_lock);
 503
 504         /* bits 2..7 reserved => mask with 0x03 */
 505         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 506         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 507
 508         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 509         mutex_unlock(&data->update_lock);
 510         return count;
 511 }
 512
 513 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 514 {
 515         /* bits 2..7 reserved => mask with 0x03 */
 516         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 517 }
 518
 519 #define RPM_FROM_REG(val)       (val*60)
 520
 521 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 522 {
 523         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 524 }
 525
 526
 527
 528 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 529
 530 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 531                                const char *buf, size_t count, int nr, int reg)
 532 {
 533         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 534         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 535
 536         mutex_lock(&data->update_lock);
 537         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 538         fscher_write_value(client, reg, v);
 539         mutex_unlock(&data->update_lock);
 540         return count;
 541 }
 542
 543 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
 544 {
 545         /* bits 2..7 reserved => mask with 0x03 */
 546         return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
 547 }
 548
 549 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
 550
 551 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
 552 {
 553         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
 554 }
 555
 556 /*
 557  * The final conversion is specified in sensors.conf, as it depends on
 558  * mainboard specific values. We export the registers contents as
 559  * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 560  * sense per se, but it minimizes the conversions count and keeps the
 561  * values within a usual range.
 562  */
 563 #define VOLT_FROM_REG(val)      ((val) * 10)
 564
 565 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
 566 {
 567         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
 568 }
 569
 570
 571
 572 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
 573 {
 574         return sprintf(buf, "%u\n", data->revision);
 575 }
 576
 577
 578
 579 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
 580 {
 581         /* bits 2, 5..6 reserved => mask with 0x9b */
 582         return sprintf(buf, "%u\n", data->global_event & 0x9b);
 583 }
 584
 585
 586
 587 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
 588                            const char *buf, size_t count, int nr, int reg)
 589 {
 590         /* bits 1..7 reserved => mask with 0x01 */
 591         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
 592
 593         mutex_lock(&data->update_lock);
 594         data->global_control = v;
 595         fscher_write_value(client, reg, v);
 596         mutex_unlock(&data->update_lock);
 597         return count;
 598 }
 599
 600 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 601 {
 602         /* bits 1..7 reserved => mask with 0x01 */
 603         return sprintf(buf, "%u\n", data->global_control & 0x01);
 604 }
 605
 606
 607
 608 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 609                                     fscher_data *data, const char *buf, size_t count,
 610                                     int nr, int reg)
 611 {
 612         /* bits 0..3 reserved => mask with 0xf0 */
 613         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 614
 615         mutex_lock(&data->update_lock);
 616         data->watchdog[2] &= ~0xf0;
 617         data->watchdog[2] |= v;
 618         fscher_write_value(client, reg, data->watchdog[2]);
 619         mutex_unlock(&data->update_lock);
 620         return count;
 621 }
 622
 623 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 624 {
 625         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 626         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 627 }
 628
 629 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 630                                    const char *buf, size_t count, int nr, int reg)
 631 {
 632         /* bits 0, 2..7 reserved => mask with 0x02 */
 633         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 634
 635         mutex_lock(&data->update_lock);
 636         data->watchdog[1] &= ~v;
 637         fscher_write_value(client, reg, v);
 638         mutex_unlock(&data->update_lock);
 639         return count;
 640 }
 641
 642 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 643 {
 644         /* bits 0, 2..7 reserved => mask with 0x02 */
 645         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 646 }
 647
 648 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 649                                    const char *buf, size_t count, int nr, int reg)
 650 {
 651         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
 652
 653         mutex_lock(&data->update_lock);
 654         data->watchdog[0] = v;
 655         fscher_write_value(client, reg, data->watchdog[0]);
 656         mutex_unlock(&data->update_lock);
 657         return count;
 658 }
 659
 660 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 661 {
 662         return sprintf(buf, "%u\n", data->watchdog[0]);
 663 }
 664
 665 static int __init sensors_fscher_init(void)
 666 {
 667         return i2c_add_driver(&fscher_driver);
 668 }
 669
 670 static void __exit sensors_fscher_exit(void)
 671 {
 672         i2c_del_driver(&fscher_driver);
 673 }
 674
 675 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 676 MODULE_DESCRIPTION("FSC Hermes driver");
 677 MODULE_LICENSE("GPL");
 678
 679 module_init(sensors_fscher_init);
 680 module_exit(sensors_fscher_exit);