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/i2c-sensor.h>
  35 #include <linux/hwmon.h>
  36 #include <linux/err.h>
  37
  38 /*
  39  * Addresses to scan
  40  */
  41
  42 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  43
  44 /*
  45  * Insmod parameters
  46  */
  47
  48 SENSORS_INSMOD_1(fscher);
  49
  50 /*
  51  * The FSCHER registers
  52  */
  53
  54 /* chip identification */
  55 #define FSCHER_REG_IDENT_0              0x00
  56 #define FSCHER_REG_IDENT_1              0x01
  57 #define FSCHER_REG_IDENT_2              0x02
  58 #define FSCHER_REG_REVISION             0x03
  59
  60 /* global control and status */
  61 #define FSCHER_REG_EVENT_STATE          0x04
  62 #define FSCHER_REG_CONTROL              0x05
  63
  64 /* watchdog */
  65 #define FSCHER_REG_WDOG_PRESET          0x28
  66 #define FSCHER_REG_WDOG_STATE           0x23
  67 #define FSCHER_REG_WDOG_CONTROL         0x21
  68
  69 /* fan 0 */
  70 #define FSCHER_REG_FAN0_MIN             0x55
  71 #define FSCHER_REG_FAN0_ACT             0x0e
  72 #define FSCHER_REG_FAN0_STATE           0x0d
  73 #define FSCHER_REG_FAN0_RIPPLE          0x0f
  74
  75 /* fan 1 */
  76 #define FSCHER_REG_FAN1_MIN             0x65
  77 #define FSCHER_REG_FAN1_ACT             0x6b
  78 #define FSCHER_REG_FAN1_STATE           0x62
  79 #define FSCHER_REG_FAN1_RIPPLE          0x6f
  80
  81 /* fan 2 */
  82 #define FSCHER_REG_FAN2_MIN             0xb5
  83 #define FSCHER_REG_FAN2_ACT             0xbb
  84 #define FSCHER_REG_FAN2_STATE           0xb2
  85 #define FSCHER_REG_FAN2_RIPPLE          0xbf
  86
  87 /* voltage supervision */
  88 #define FSCHER_REG_VOLT_12              0x45
  89 #define FSCHER_REG_VOLT_5               0x42
  90 #define FSCHER_REG_VOLT_BATT            0x48
  91
  92 /* temperature 0 */
  93 #define FSCHER_REG_TEMP0_ACT            0x64
  94 #define FSCHER_REG_TEMP0_STATE          0x71
  95
  96 /* temperature 1 */
  97 #define FSCHER_REG_TEMP1_ACT            0x32
  98 #define FSCHER_REG_TEMP1_STATE          0x81
  99
 100 /* temperature 2 */
 101 #define FSCHER_REG_TEMP2_ACT            0x35
 102 #define FSCHER_REG_TEMP2_STATE          0x91
 103
 104 /*
 105  * Functions declaration
 106  */
 107
 108 static int fscher_attach_adapter(struct i2c_adapter *adapter);
 109 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
 110 static int fscher_detach_client(struct i2c_client *client);
 111 static struct fscher_data *fscher_update_device(struct device *dev);
 112 static void fscher_init_client(struct i2c_client *client);
 113
 114 static int fscher_read_value(struct i2c_client *client, u8 reg);
 115 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
 116
 117 /*
 118  * Driver data (common to all clients)
 119  */
 120
 121 static struct i2c_driver fscher_driver = {
 122         .owner          = THIS_MODULE,
 123         .name           = "fscher",
 124         .id             = I2C_DRIVERID_FSCHER,
 125         .flags          = I2C_DF_NOTIFY,
 126         .attach_adapter = fscher_attach_adapter,
 127         .detach_client  = fscher_detach_client,
 128 };
 129
 130 /*
 131  * Client data (each client gets its own)
 132  */
 133
 134 struct fscher_data {
 135         struct i2c_client client;
 136         struct class_device *class_dev;
 137         struct semaphore update_lock;
 138         char valid; /* zero until following fields are valid */
 139         unsigned long last_updated; /* in jiffies */
 140
 141         /* register values */
 142         u8 revision;            /* revision of chip */
 143         u8 global_event;        /* global event status */
 144         u8 global_control;      /* global control register */
 145         u8 watchdog[3];         /* watchdog */
 146         u8 volt[3];             /* 12, 5, battery voltage */
 147         u8 temp_act[3];         /* temperature */
 148         u8 temp_status[3];      /* status of sensor */
 149         u8 fan_act[3];          /* fans revolutions per second */
 150         u8 fan_status[3];       /* fan status */
 151         u8 fan_min[3];          /* fan min value for rps */
 152         u8 fan_ripple[3];       /* divider for rps */
 153 };
 154
 155 /*
 156  * Sysfs stuff
 157  */
 158
 159 #define sysfs_r(kind, sub, offset, reg) \
 160 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
 161 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
 162 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
 163 { \
 164         struct fscher_data *data = fscher_update_device(dev); \
 165         return show_##kind##sub(data, buf, (offset)); \
 166 }
 167
 168 #define sysfs_w(kind, sub, offset, reg) \
 169 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
 170 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
 171 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 172 { \
 173         struct i2c_client *client = to_i2c_client(dev); \
 174         struct fscher_data *data = i2c_get_clientdata(client); \
 175         return set_##kind##sub(client, data, buf, count, (offset), reg); \
 176 }
 177
 178 #define sysfs_rw_n(kind, sub, offset, reg) \
 179 sysfs_r(kind, sub, offset, reg) \
 180 sysfs_w(kind, sub, offset, reg) \
 181 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
 182
 183 #define sysfs_rw(kind, sub, reg) \
 184 sysfs_r(kind, sub, 0, reg) \
 185 sysfs_w(kind, sub, 0, reg) \
 186 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
 187
 188 #define sysfs_ro_n(kind, sub, offset, reg) \
 189 sysfs_r(kind, sub, offset, reg) \
 190 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
 191
 192 #define sysfs_ro(kind, sub, reg) \
 193 sysfs_r(kind, sub, 0, reg) \
 194 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
 195
 196 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
 197 sysfs_rw_n(pwm,        , offset, reg_min) \
 198 sysfs_rw_n(fan, _status, offset, reg_status) \
 199 sysfs_rw_n(fan, _div   , offset, reg_ripple) \
 200 sysfs_ro_n(fan, _input , offset, reg_act)
 201
 202 #define sysfs_temp(offset, reg_status, reg_act) \
 203 sysfs_rw_n(temp, _status, offset, reg_status) \
 204 sysfs_ro_n(temp, _input , offset, reg_act)
 205
 206 #define sysfs_in(offset, reg_act) \
 207 sysfs_ro_n(in, _input, offset, reg_act)
 208
 209 #define sysfs_revision(reg_revision) \
 210 sysfs_ro(revision, , reg_revision)
 211
 212 #define sysfs_alarms(reg_events) \
 213 sysfs_ro(alarms, , reg_events)
 214
 215 #define sysfs_control(reg_control) \
 216 sysfs_rw(control, , reg_control)
 217
 218 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
 219 sysfs_rw(watchdog, _control, reg_control) \
 220 sysfs_rw(watchdog, _status , reg_status) \
 221 sysfs_rw(watchdog, _preset , reg_preset)
 222
 223 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
 224              FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
 225 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
 226              FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
 227 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
 228              FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
 229
 230 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
 231 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
 232 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
 233
 234 sysfs_in(0, FSCHER_REG_VOLT_12)
 235 sysfs_in(1, FSCHER_REG_VOLT_5)
 236 sysfs_in(2, FSCHER_REG_VOLT_BATT)
 237
 238 sysfs_revision(FSCHER_REG_REVISION)
 239 sysfs_alarms(FSCHER_REG_EVENTS)
 240 sysfs_control(FSCHER_REG_CONTROL)
 241 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
 242
 243 #define device_create_file_fan(client, offset) \
 244 do { \
 245         device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
 246         device_create_file(&client->dev, &dev_attr_pwm##offset); \
 247         device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 248         device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 249 } while (0)
 250
 251 #define device_create_file_temp(client, offset) \
 252 do { \
 253         device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
 254         device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
 255 } while (0)
 256
 257 #define device_create_file_in(client, offset) \
 258 do { \
 259         device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 260 } while (0)
 261
 262 #define device_create_file_revision(client) \
 263 do { \
 264         device_create_file(&client->dev, &dev_attr_revision); \
 265 } while (0)
 266
 267 #define device_create_file_alarms(client) \
 268 do { \
 269         device_create_file(&client->dev, &dev_attr_alarms); \
 270 } while (0)
 271
 272 #define device_create_file_control(client) \
 273 do { \
 274         device_create_file(&client->dev, &dev_attr_control); \
 275 } while (0)
 276
 277 #define device_create_file_watchdog(client) \
 278 do { \
 279         device_create_file(&client->dev, &dev_attr_watchdog_status); \
 280         device_create_file(&client->dev, &dev_attr_watchdog_control); \
 281         device_create_file(&client->dev, &dev_attr_watchdog_preset); \
 282 } while (0)
 283
 284 /*
 285  * Real code
 286  */
 287
 288 static int fscher_attach_adapter(struct i2c_adapter *adapter)
 289 {
 290         if (!(adapter->class & I2C_CLASS_HWMON))
 291                 return 0;
 292         return i2c_detect(adapter, &addr_data, fscher_detect);
 293 }
 294
 295 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
 296 {
 297         struct i2c_client *new_client;
 298         struct fscher_data *data;
 299         int err = 0;
 300
 301         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 302                 goto exit;
 303
 304         /* OK. For now, we presume we have a valid client. We now create the
 305          * client structure, even though we cannot fill it completely yet.
 306          * But it allows us to access i2c_smbus_read_byte_data. */
 307         if (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
 308                 err = -ENOMEM;
 309                 goto exit;
 310         }
 311         memset(data, 0, sizeof(struct fscher_data));
 312
 313         /* The common I2C client data is placed right before the
 314          * Hermes-specific data. */
 315         new_client = &data->client;
 316         i2c_set_clientdata(new_client, data);
 317         new_client->addr = address;
 318         new_client->adapter = adapter;
 319         new_client->driver = &fscher_driver;
 320         new_client->flags = 0;
 321
 322         /* Do the remaining detection unless force or force_fscher parameter */
 323         if (kind < 0) {
 324                 if ((i2c_smbus_read_byte_data(new_client,
 325                      FSCHER_REG_IDENT_0) != 0x48)       /* 'H' */
 326                  || (i2c_smbus_read_byte_data(new_client,
 327                      FSCHER_REG_IDENT_1) != 0x45)       /* 'E' */
 328                  || (i2c_smbus_read_byte_data(new_client,
 329                      FSCHER_REG_IDENT_2) != 0x52))      /* 'R' */
 330                         goto exit_free;
 331         }
 332
 333         /* Fill in the remaining client fields and put it into the
 334          * global list */
 335         strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
 336         data->valid = 0;
 337         init_MUTEX(&data->update_lock);
 338
 339         /* Tell the I2C layer a new client has arrived */
 340         if ((err = i2c_attach_client(new_client)))
 341                 goto exit_free;
 342
 343         fscher_init_client(new_client);
 344
 345         /* Register sysfs hooks */
 346         data->class_dev = hwmon_device_register(&new_client->dev);
 347         if (IS_ERR(data->class_dev)) {
 348                 err = PTR_ERR(data->class_dev);
 349                 goto exit_detach;
 350         }
 351
 352         device_create_file_revision(new_client);
 353         device_create_file_alarms(new_client);
 354         device_create_file_control(new_client);
 355         device_create_file_watchdog(new_client);
 356
 357         device_create_file_in(new_client, 0);
 358         device_create_file_in(new_client, 1);
 359         device_create_file_in(new_client, 2);
 360
 361         device_create_file_fan(new_client, 1);
 362         device_create_file_fan(new_client, 2);
 363         device_create_file_fan(new_client, 3);
 364
 365         device_create_file_temp(new_client, 1);
 366         device_create_file_temp(new_client, 2);
 367         device_create_file_temp(new_client, 3);
 368
 369         return 0;
 370
 371 exit_detach:
 372         i2c_detach_client(new_client);
 373 exit_free:
 374         kfree(data);
 375 exit:
 376         return err;
 377 }
 378
 379 static int fscher_detach_client(struct i2c_client *client)
 380 {
 381         struct fscher_data *data = i2c_get_clientdata(client);
 382         int err;
 383
 384         hwmon_device_unregister(data->class_dev);
 385
 386         if ((err = i2c_detach_client(client)))
 387                 return err;
 388
 389         kfree(data);
 390         return 0;
 391 }
 392
 393 static int fscher_read_value(struct i2c_client *client, u8 reg)
 394 {
 395         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 396
 397         return i2c_smbus_read_byte_data(client, reg);
 398 }
 399
 400 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 401 {
 402         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 403                 reg, value);
 404
 405         return i2c_smbus_write_byte_data(client, reg, value);
 406 }
 407
 408 /* Called when we have found a new FSC Hermes. */
 409 static void fscher_init_client(struct i2c_client *client)
 410 {
 411         struct fscher_data *data = i2c_get_clientdata(client);
 412
 413         /* Read revision from chip */
 414         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 415 }
 416
 417 static struct fscher_data *fscher_update_device(struct device *dev)
 418 {
 419         struct i2c_client *client = to_i2c_client(dev);
 420         struct fscher_data *data = i2c_get_clientdata(client);
 421
 422         down(&data->update_lock);
 423
 424         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 425
 426                 dev_dbg(&client->dev, "Starting fscher update\n");
 427
 428                 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
 429                 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
 430                 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
 431                 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
 432                 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
 433                 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
 434
 435                 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
 436                 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
 437                 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
 438
 439                 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
 440                 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
 441                 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
 442                 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
 443                 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
 444                 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
 445                 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
 446                 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
 447                 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
 448                 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
 449                 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
 450                 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
 451
 452                 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
 453                 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
 454                 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
 455
 456                 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
 457
 458                 data->last_updated = jiffies;
 459                 data->valid = 1;
 460         }
 461
 462         up(&data->update_lock);
 463
 464         return data;
 465 }
 466
 467
 468
 469 #define FAN_INDEX_FROM_NUM(nr)  ((nr) - 1)
 470
 471 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
 472                               const char *buf, size_t count, int nr, int reg)
 473 {
 474         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 475         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
 476
 477         down(&data->update_lock);
 478         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 479         fscher_write_value(client, reg, v);
 480         up(&data->update_lock);
 481         return count;
 482 }
 483
 484 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
 485 {
 486         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 487         return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
 488 }
 489
 490 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
 491                        const char *buf, size_t count, int nr, int reg)
 492 {
 493         unsigned long v = simple_strtoul(buf, NULL, 10);
 494
 495         down(&data->update_lock);
 496         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
 497         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 498         up(&data->update_lock);
 499         return count;
 500 }
 501
 502 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
 503 {
 504         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 505 }
 506
 507 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 508                            const char *buf, size_t count, int nr, int reg)
 509 {
 510         /* supported values: 2, 4, 8 */
 511         unsigned long v = simple_strtoul(buf, NULL, 10);
 512
 513         switch (v) {
 514         case 2: v = 1; break;
 515         case 4: v = 2; break;
 516         case 8: v = 3; break;
 517         default:
 518                 dev_err(&client->dev, "fan_div value %ld not "
 519                          "supported. Choose one of 2, 4 or 8!\n", v);
 520                 return -EINVAL;
 521         }
 522
 523         down(&data->update_lock);
 524
 525         /* bits 2..7 reserved => mask with 0x03 */
 526         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 527         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 528
 529         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 530         up(&data->update_lock);
 531         return count;
 532 }
 533
 534 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 535 {
 536         /* bits 2..7 reserved => mask with 0x03 */
 537         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 538 }
 539
 540 #define RPM_FROM_REG(val)       (val*60)
 541
 542 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 543 {
 544         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 545 }
 546
 547
 548
 549 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 550
 551 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 552                                const char *buf, size_t count, int nr, int reg)
 553 {
 554         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 555         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 556
 557         down(&data->update_lock);
 558         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 559         fscher_write_value(client, reg, v);
 560         up(&data->update_lock);
 561         return count;
 562 }
 563
 564 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
 565 {
 566         /* bits 2..7 reserved => mask with 0x03 */
 567         return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
 568 }
 569
 570 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
 571
 572 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
 573 {
 574         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
 575 }
 576
 577 /*
 578  * The final conversion is specified in sensors.conf, as it depends on
 579  * mainboard specific values. We export the registers contents as
 580  * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 581  * sense per se, but it minimizes the conversions count and keeps the
 582  * values within a usual range.
 583  */
 584 #define VOLT_FROM_REG(val)      ((val) * 10)
 585
 586 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
 587 {
 588         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
 589 }
 590
 591
 592
 593 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
 594 {
 595         return sprintf(buf, "%u\n", data->revision);
 596 }
 597
 598
 599
 600 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
 601 {
 602         /* bits 2, 5..6 reserved => mask with 0x9b */
 603         return sprintf(buf, "%u\n", data->global_event & 0x9b);
 604 }
 605
 606
 607
 608 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
 609                            const char *buf, size_t count, int nr, int reg)
 610 {
 611         /* bits 1..7 reserved => mask with 0x01 */
 612         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
 613
 614         down(&data->update_lock);
 615         data->global_control &= ~v;
 616         fscher_write_value(client, reg, v);
 617         up(&data->update_lock);
 618         return count;
 619 }
 620
 621 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 622 {
 623         /* bits 1..7 reserved => mask with 0x01 */
 624         return sprintf(buf, "%u\n", data->global_control & 0x01);
 625 }
 626
 627
 628
 629 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 630                                     fscher_data *data, const char *buf, size_t count,
 631                                     int nr, int reg)
 632 {
 633         /* bits 0..3 reserved => mask with 0xf0 */
 634         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 635
 636         down(&data->update_lock);
 637         data->watchdog[2] &= ~0xf0;
 638         data->watchdog[2] |= v;
 639         fscher_write_value(client, reg, data->watchdog[2]);
 640         up(&data->update_lock);
 641         return count;
 642 }
 643
 644 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 645 {
 646         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 647         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 648 }
 649
 650 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 651                                    const char *buf, size_t count, int nr, int reg)
 652 {
 653         /* bits 0, 2..7 reserved => mask with 0x02 */
 654         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 655
 656         down(&data->update_lock);
 657         data->watchdog[1] &= ~v;
 658         fscher_write_value(client, reg, v);
 659         up(&data->update_lock);
 660         return count;
 661 }
 662
 663 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 664 {
 665         /* bits 0, 2..7 reserved => mask with 0x02 */
 666         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 667 }
 668
 669 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 670                                    const char *buf, size_t count, int nr, int reg)
 671 {
 672         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
 673
 674         down(&data->update_lock);
 675         data->watchdog[0] = v;
 676         fscher_write_value(client, reg, data->watchdog[0]);
 677         up(&data->update_lock);
 678         return count;
 679 }
 680
 681 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 682 {
 683         return sprintf(buf, "%u\n", data->watchdog[0]);
 684 }
 685
 686 static int __init sensors_fscher_init(void)
 687 {
 688         return i2c_add_driver(&fscher_driver);
 689 }
 690
 691 static void __exit sensors_fscher_exit(void)
 692 {
 693         i2c_del_driver(&fscher_driver);
 694 }
 695
 696 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 697 MODULE_DESCRIPTION("FSC Hermes driver");
 698 MODULE_LICENSE("GPL");
 699
 700 module_init(sensors_fscher_init);
 701 module_exit(sensors_fscher_exit);