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 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_attach_adapter(struct i2c_adapter *adapter);
 110 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
 111 static int fscher_detach_client(struct i2c_client *client);
 112 static struct fscher_data *fscher_update_device(struct device *dev);
 113 static void fscher_init_client(struct i2c_client *client);
 114
 115 static int fscher_read_value(struct i2c_client *client, u8 reg);
 116 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
 117
 118 /*
 119  * Driver data (common to all clients)
 120  */
 121
 122 static struct i2c_driver fscher_driver = {
 123         .driver = {
 124                 .name   = "fscher",
 125         },
 126         .id             = I2C_DRIVERID_FSCHER,
 127         .attach_adapter = fscher_attach_adapter,
 128         .detach_client  = fscher_detach_client,
 129 };
 130
 131 /*
 132  * Client data (each client gets its own)
 133  */
 134
 135 struct fscher_data {
 136         struct i2c_client client;
 137         struct device *hwmon_dev;
 138         struct mutex update_lock;
 139         char valid; /* zero until following fields are valid */
 140         unsigned long last_updated; /* in jiffies */
 141
 142         /* register values */
 143         u8 revision;            /* revision of chip */
 144         u8 global_event;        /* global event status */
 145         u8 global_control;      /* global control register */
 146         u8 watchdog[3];         /* watchdog */
 147         u8 volt[3];             /* 12, 5, battery voltage */
 148         u8 temp_act[3];         /* temperature */
 149         u8 temp_status[3];      /* status of sensor */
 150         u8 fan_act[3];          /* fans revolutions per second */
 151         u8 fan_status[3];       /* fan status */
 152         u8 fan_min[3];          /* fan min value for rps */
 153         u8 fan_ripple[3];       /* divider for rps */
 154 };
 155
 156 /*
 157  * Sysfs stuff
 158  */
 159
 160 #define sysfs_r(kind, sub, offset, reg) \
 161 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
 162 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
 163 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
 164 { \
 165         struct fscher_data *data = fscher_update_device(dev); \
 166         return show_##kind##sub(data, buf, (offset)); \
 167 }
 168
 169 #define sysfs_w(kind, sub, offset, reg) \
 170 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
 171 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
 172 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 173 { \
 174         struct i2c_client *client = to_i2c_client(dev); \
 175         struct fscher_data *data = i2c_get_clientdata(client); \
 176         return set_##kind##sub(client, data, buf, count, (offset), reg); \
 177 }
 178
 179 #define sysfs_rw_n(kind, sub, offset, reg) \
 180 sysfs_r(kind, sub, offset, reg) \
 181 sysfs_w(kind, sub, offset, reg) \
 182 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
 183
 184 #define sysfs_rw(kind, sub, reg) \
 185 sysfs_r(kind, sub, 0, reg) \
 186 sysfs_w(kind, sub, 0, reg) \
 187 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
 188
 189 #define sysfs_ro_n(kind, sub, offset, reg) \
 190 sysfs_r(kind, sub, offset, reg) \
 191 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
 192
 193 #define sysfs_ro(kind, sub, reg) \
 194 sysfs_r(kind, sub, 0, reg) \
 195 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
 196
 197 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
 198 sysfs_rw_n(pwm,        , offset, reg_min) \
 199 sysfs_rw_n(fan, _status, offset, reg_status) \
 200 sysfs_rw_n(fan, _div   , offset, reg_ripple) \
 201 sysfs_ro_n(fan, _input , offset, reg_act)
 202
 203 #define sysfs_temp(offset, reg_status, reg_act) \
 204 sysfs_rw_n(temp, _status, offset, reg_status) \
 205 sysfs_ro_n(temp, _input , offset, reg_act)
 206
 207 #define sysfs_in(offset, reg_act) \
 208 sysfs_ro_n(in, _input, offset, reg_act)
 209
 210 #define sysfs_revision(reg_revision) \
 211 sysfs_ro(revision, , reg_revision)
 212
 213 #define sysfs_alarms(reg_events) \
 214 sysfs_ro(alarms, , reg_events)
 215
 216 #define sysfs_control(reg_control) \
 217 sysfs_rw(control, , reg_control)
 218
 219 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
 220 sysfs_rw(watchdog, _control, reg_control) \
 221 sysfs_rw(watchdog, _status , reg_status) \
 222 sysfs_rw(watchdog, _preset , reg_preset)
 223
 224 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
 225              FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
 226 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
 227              FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
 228 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
 229              FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
 230
 231 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
 232 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
 233 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
 234
 235 sysfs_in(0, FSCHER_REG_VOLT_12)
 236 sysfs_in(1, FSCHER_REG_VOLT_5)
 237 sysfs_in(2, FSCHER_REG_VOLT_BATT)
 238
 239 sysfs_revision(FSCHER_REG_REVISION)
 240 sysfs_alarms(FSCHER_REG_EVENTS)
 241 sysfs_control(FSCHER_REG_CONTROL)
 242 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
 243
 244 static struct attribute *fscher_attributes[] = {
 245         &dev_attr_revision.attr,
 246         &dev_attr_alarms.attr,
 247         &dev_attr_control.attr,
 248
 249         &dev_attr_watchdog_status.attr,
 250         &dev_attr_watchdog_control.attr,
 251         &dev_attr_watchdog_preset.attr,
 252
 253         &dev_attr_in0_input.attr,
 254         &dev_attr_in1_input.attr,
 255         &dev_attr_in2_input.attr,
 256
 257         &dev_attr_fan1_status.attr,
 258         &dev_attr_fan1_div.attr,
 259         &dev_attr_fan1_input.attr,
 260         &dev_attr_pwm1.attr,
 261         &dev_attr_fan2_status.attr,
 262         &dev_attr_fan2_div.attr,
 263         &dev_attr_fan2_input.attr,
 264         &dev_attr_pwm2.attr,
 265         &dev_attr_fan3_status.attr,
 266         &dev_attr_fan3_div.attr,
 267         &dev_attr_fan3_input.attr,
 268         &dev_attr_pwm3.attr,
 269
 270         &dev_attr_temp1_status.attr,
 271         &dev_attr_temp1_input.attr,
 272         &dev_attr_temp2_status.attr,
 273         &dev_attr_temp2_input.attr,
 274         &dev_attr_temp3_status.attr,
 275         &dev_attr_temp3_input.attr,
 276         NULL
 277 };
 278
 279 static const struct attribute_group fscher_group = {
 280         .attrs = fscher_attributes,
 281 };
 282
 283 /*
 284  * Real code
 285  */
 286
 287 static int fscher_attach_adapter(struct i2c_adapter *adapter)
 288 {
 289         if (!(adapter->class & I2C_CLASS_HWMON))
 290                 return 0;
 291         return i2c_probe(adapter, &addr_data, fscher_detect);
 292 }
 293
 294 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
 295 {
 296         struct i2c_client *new_client;
 297         struct fscher_data *data;
 298         int err = 0;
 299
 300         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 301                 goto exit;
 302
 303         /* OK. For now, we presume we have a valid client. We now create the
 304          * client structure, even though we cannot fill it completely yet.
 305          * But it allows us to access i2c_smbus_read_byte_data. */
 306         if (!(data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
 307                 err = -ENOMEM;
 308                 goto exit;
 309         }
 310
 311         /* The common I2C client data is placed right before the
 312          * Hermes-specific data. */
 313         new_client = &data->client;
 314         i2c_set_clientdata(new_client, data);
 315         new_client->addr = address;
 316         new_client->adapter = adapter;
 317         new_client->driver = &fscher_driver;
 318         new_client->flags = 0;
 319
 320         /* Do the remaining detection unless force or force_fscher parameter */
 321         if (kind < 0) {
 322                 if ((i2c_smbus_read_byte_data(new_client,
 323                      FSCHER_REG_IDENT_0) != 0x48)       /* 'H' */
 324                  || (i2c_smbus_read_byte_data(new_client,
 325                      FSCHER_REG_IDENT_1) != 0x45)       /* 'E' */
 326                  || (i2c_smbus_read_byte_data(new_client,
 327                      FSCHER_REG_IDENT_2) != 0x52))      /* 'R' */
 328                         goto exit_free;
 329         }
 330
 331         /* Fill in the remaining client fields and put it into the
 332          * global list */
 333         strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
 334         data->valid = 0;
 335         mutex_init(&data->update_lock);
 336
 337         /* Tell the I2C layer a new client has arrived */
 338         if ((err = i2c_attach_client(new_client)))
 339                 goto exit_free;
 340
 341         fscher_init_client(new_client);
 342
 343         /* Register sysfs hooks */
 344         if ((err = sysfs_create_group(&new_client->dev.kobj, &fscher_group)))
 345                 goto exit_detach;
 346
 347         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 348         if (IS_ERR(data->hwmon_dev)) {
 349                 err = PTR_ERR(data->hwmon_dev);
 350                 goto exit_remove_files;
 351         }
 352
 353         return 0;
 354
 355 exit_remove_files:
 356         sysfs_remove_group(&new_client->dev.kobj, &fscher_group);
 357 exit_detach:
 358         i2c_detach_client(new_client);
 359 exit_free:
 360         kfree(data);
 361 exit:
 362         return err;
 363 }
 364
 365 static int fscher_detach_client(struct i2c_client *client)
 366 {
 367         struct fscher_data *data = i2c_get_clientdata(client);
 368         int err;
 369
 370         hwmon_device_unregister(data->hwmon_dev);
 371         sysfs_remove_group(&client->dev.kobj, &fscher_group);
 372
 373         if ((err = i2c_detach_client(client)))
 374                 return err;
 375
 376         kfree(data);
 377         return 0;
 378 }
 379
 380 static int fscher_read_value(struct i2c_client *client, u8 reg)
 381 {
 382         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 383
 384         return i2c_smbus_read_byte_data(client, reg);
 385 }
 386
 387 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 388 {
 389         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 390                 reg, value);
 391
 392         return i2c_smbus_write_byte_data(client, reg, value);
 393 }
 394
 395 /* Called when we have found a new FSC Hermes. */
 396 static void fscher_init_client(struct i2c_client *client)
 397 {
 398         struct fscher_data *data = i2c_get_clientdata(client);
 399
 400         /* Read revision from chip */
 401         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 402 }
 403
 404 static struct fscher_data *fscher_update_device(struct device *dev)
 405 {
 406         struct i2c_client *client = to_i2c_client(dev);
 407         struct fscher_data *data = i2c_get_clientdata(client);
 408
 409         mutex_lock(&data->update_lock);
 410
 411         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 412
 413                 dev_dbg(&client->dev, "Starting fscher update\n");
 414
 415                 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
 416                 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
 417                 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
 418                 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
 419                 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
 420                 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
 421
 422                 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
 423                 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
 424                 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
 425
 426                 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
 427                 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
 428                 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
 429                 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
 430                 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
 431                 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
 432                 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
 433                 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
 434                 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
 435                 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
 436                 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
 437                 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
 438
 439                 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
 440                 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
 441                 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
 442
 443                 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
 444                 data->global_control = fscher_read_value(client,
 445                                                         FSCHER_REG_CONTROL);
 446
 447                 data->last_updated = jiffies;
 448                 data->valid = 1;
 449         }
 450
 451         mutex_unlock(&data->update_lock);
 452
 453         return data;
 454 }
 455
 456
 457
 458 #define FAN_INDEX_FROM_NUM(nr)  ((nr) - 1)
 459
 460 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
 461                               const char *buf, size_t count, int nr, int reg)
 462 {
 463         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 464         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
 465
 466         mutex_lock(&data->update_lock);
 467         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 468         fscher_write_value(client, reg, v);
 469         mutex_unlock(&data->update_lock);
 470         return count;
 471 }
 472
 473 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
 474 {
 475         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 476         return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
 477 }
 478
 479 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
 480                        const char *buf, size_t count, int nr, int reg)
 481 {
 482         unsigned long v = simple_strtoul(buf, NULL, 10);
 483
 484         mutex_lock(&data->update_lock);
 485         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
 486         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 487         mutex_unlock(&data->update_lock);
 488         return count;
 489 }
 490
 491 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
 492 {
 493         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 494 }
 495
 496 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 497                            const char *buf, size_t count, int nr, int reg)
 498 {
 499         /* supported values: 2, 4, 8 */
 500         unsigned long v = simple_strtoul(buf, NULL, 10);
 501
 502         switch (v) {
 503         case 2: v = 1; break;
 504         case 4: v = 2; break;
 505         case 8: v = 3; break;
 506         default:
 507                 dev_err(&client->dev, "fan_div value %ld not "
 508                          "supported. Choose one of 2, 4 or 8!\n", v);
 509                 return -EINVAL;
 510         }
 511
 512         mutex_lock(&data->update_lock);
 513
 514         /* bits 2..7 reserved => mask with 0x03 */
 515         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 516         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 517
 518         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 519         mutex_unlock(&data->update_lock);
 520         return count;
 521 }
 522
 523 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 524 {
 525         /* bits 2..7 reserved => mask with 0x03 */
 526         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 527 }
 528
 529 #define RPM_FROM_REG(val)       (val*60)
 530
 531 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 532 {
 533         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 534 }
 535
 536
 537
 538 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 539
 540 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 541                                const char *buf, size_t count, int nr, int reg)
 542 {
 543         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 544         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 545
 546         mutex_lock(&data->update_lock);
 547         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 548         fscher_write_value(client, reg, v);
 549         mutex_unlock(&data->update_lock);
 550         return count;
 551 }
 552
 553 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
 554 {
 555         /* bits 2..7 reserved => mask with 0x03 */
 556         return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
 557 }
 558
 559 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
 560
 561 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
 562 {
 563         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
 564 }
 565
 566 /*
 567  * The final conversion is specified in sensors.conf, as it depends on
 568  * mainboard specific values. We export the registers contents as
 569  * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 570  * sense per se, but it minimizes the conversions count and keeps the
 571  * values within a usual range.
 572  */
 573 #define VOLT_FROM_REG(val)      ((val) * 10)
 574
 575 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
 576 {
 577         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
 578 }
 579
 580
 581
 582 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
 583 {
 584         return sprintf(buf, "%u\n", data->revision);
 585 }
 586
 587
 588
 589 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
 590 {
 591         /* bits 2, 5..6 reserved => mask with 0x9b */
 592         return sprintf(buf, "%u\n", data->global_event & 0x9b);
 593 }
 594
 595
 596
 597 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
 598                            const char *buf, size_t count, int nr, int reg)
 599 {
 600         /* bits 1..7 reserved => mask with 0x01 */
 601         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
 602
 603         mutex_lock(&data->update_lock);
 604         data->global_control = v;
 605         fscher_write_value(client, reg, v);
 606         mutex_unlock(&data->update_lock);
 607         return count;
 608 }
 609
 610 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 611 {
 612         /* bits 1..7 reserved => mask with 0x01 */
 613         return sprintf(buf, "%u\n", data->global_control & 0x01);
 614 }
 615
 616
 617
 618 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 619                                     fscher_data *data, const char *buf, size_t count,
 620                                     int nr, int reg)
 621 {
 622         /* bits 0..3 reserved => mask with 0xf0 */
 623         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 624
 625         mutex_lock(&data->update_lock);
 626         data->watchdog[2] &= ~0xf0;
 627         data->watchdog[2] |= v;
 628         fscher_write_value(client, reg, data->watchdog[2]);
 629         mutex_unlock(&data->update_lock);
 630         return count;
 631 }
 632
 633 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 634 {
 635         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 636         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 637 }
 638
 639 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 640                                    const char *buf, size_t count, int nr, int reg)
 641 {
 642         /* bits 0, 2..7 reserved => mask with 0x02 */
 643         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 644
 645         mutex_lock(&data->update_lock);
 646         data->watchdog[1] &= ~v;
 647         fscher_write_value(client, reg, v);
 648         mutex_unlock(&data->update_lock);
 649         return count;
 650 }
 651
 652 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 653 {
 654         /* bits 0, 2..7 reserved => mask with 0x02 */
 655         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 656 }
 657
 658 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 659                                    const char *buf, size_t count, int nr, int reg)
 660 {
 661         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
 662
 663         mutex_lock(&data->update_lock);
 664         data->watchdog[0] = v;
 665         fscher_write_value(client, reg, data->watchdog[0]);
 666         mutex_unlock(&data->update_lock);
 667         return count;
 668 }
 669
 670 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 671 {
 672         return sprintf(buf, "%u\n", data->watchdog[0]);
 673 }
 674
 675 static int __init sensors_fscher_init(void)
 676 {
 677         return i2c_add_driver(&fscher_driver);
 678 }
 679
 680 static void __exit sensors_fscher_exit(void)
 681 {
 682         i2c_del_driver(&fscher_driver);
 683 }
 684
 685 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 686 MODULE_DESCRIPTION("FSC Hermes driver");
 687 MODULE_LICENSE("GPL");
 688
 689 module_init(sensors_fscher_init);
 690 module_exit(sensors_fscher_exit);