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
  37 /*
  38  * Addresses to scan
  39  */
  40
  41 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  42
  43 /*
  44  * Insmod parameters
  45  */
  46
  47 I2C_CLIENT_INSMOD_1(fscher);
  48
  49 /*
  50  * The FSCHER registers
  51  */
  52
  53 /* chip identification */
  54 #define FSCHER_REG_IDENT_0              0x00
  55 #define FSCHER_REG_IDENT_1              0x01
  56 #define FSCHER_REG_IDENT_2              0x02
  57 #define FSCHER_REG_REVISION             0x03
  58
  59 /* global control and status */
  60 #define FSCHER_REG_EVENT_STATE          0x04
  61 #define FSCHER_REG_CONTROL              0x05
  62
  63 /* watchdog */
  64 #define FSCHER_REG_WDOG_PRESET          0x28
  65 #define FSCHER_REG_WDOG_STATE           0x23
  66 #define FSCHER_REG_WDOG_CONTROL         0x21
  67
  68 /* fan 0 */
  69 #define FSCHER_REG_FAN0_MIN             0x55
  70 #define FSCHER_REG_FAN0_ACT             0x0e
  71 #define FSCHER_REG_FAN0_STATE           0x0d
  72 #define FSCHER_REG_FAN0_RIPPLE          0x0f
  73
  74 /* fan 1 */
  75 #define FSCHER_REG_FAN1_MIN             0x65
  76 #define FSCHER_REG_FAN1_ACT             0x6b
  77 #define FSCHER_REG_FAN1_STATE           0x62
  78 #define FSCHER_REG_FAN1_RIPPLE          0x6f
  79
  80 /* fan 2 */
  81 #define FSCHER_REG_FAN2_MIN             0xb5
  82 #define FSCHER_REG_FAN2_ACT             0xbb
  83 #define FSCHER_REG_FAN2_STATE           0xb2
  84 #define FSCHER_REG_FAN2_RIPPLE          0xbf
  85
  86 /* voltage supervision */
  87 #define FSCHER_REG_VOLT_12              0x45
  88 #define FSCHER_REG_VOLT_5               0x42
  89 #define FSCHER_REG_VOLT_BATT            0x48
  90
  91 /* temperature 0 */
  92 #define FSCHER_REG_TEMP0_ACT            0x64
  93 #define FSCHER_REG_TEMP0_STATE          0x71
  94
  95 /* temperature 1 */
  96 #define FSCHER_REG_TEMP1_ACT            0x32
  97 #define FSCHER_REG_TEMP1_STATE          0x81
  98
  99 /* temperature 2 */
 100 #define FSCHER_REG_TEMP2_ACT            0x35
 101 #define FSCHER_REG_TEMP2_STATE          0x91
 102
 103 /*
 104  * Functions declaration
 105  */
 106
 107 static int fscher_attach_adapter(struct i2c_adapter *adapter);
 108 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
 109 static int fscher_detach_client(struct i2c_client *client);
 110 static struct fscher_data *fscher_update_device(struct device *dev);
 111 static void fscher_init_client(struct i2c_client *client);
 112
 113 static int fscher_read_value(struct i2c_client *client, u8 reg);
 114 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
 115
 116 /*
 117  * Driver data (common to all clients)
 118  */
 119
 120 static struct i2c_driver fscher_driver = {
 121         .owner          = THIS_MODULE,
 122         .name           = "fscher",
 123         .id             = I2C_DRIVERID_FSCHER,
 124         .flags          = I2C_DF_NOTIFY,
 125         .attach_adapter = fscher_attach_adapter,
 126         .detach_client  = fscher_detach_client,
 127 };
 128
 129 /*
 130  * Client data (each client gets its own)
 131  */
 132
 133 struct fscher_data {
 134         struct i2c_client client;
 135         struct class_device *class_dev;
 136         struct semaphore update_lock;
 137         char valid; /* zero until following fields are valid */
 138         unsigned long last_updated; /* in jiffies */
 139
 140         /* register values */
 141         u8 revision;            /* revision of chip */
 142         u8 global_event;        /* global event status */
 143         u8 global_control;      /* global control register */
 144         u8 watchdog[3];         /* watchdog */
 145         u8 volt[3];             /* 12, 5, battery voltage */
 146         u8 temp_act[3];         /* temperature */
 147         u8 temp_status[3];      /* status of sensor */
 148         u8 fan_act[3];          /* fans revolutions per second */
 149         u8 fan_status[3];       /* fan status */
 150         u8 fan_min[3];          /* fan min value for rps */
 151         u8 fan_ripple[3];       /* divider for rps */
 152 };
 153
 154 /*
 155  * Sysfs stuff
 156  */
 157
 158 #define sysfs_r(kind, sub, offset, reg) \
 159 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
 160 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
 161 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
 162 { \
 163         struct fscher_data *data = fscher_update_device(dev); \
 164         return show_##kind##sub(data, buf, (offset)); \
 165 }
 166
 167 #define sysfs_w(kind, sub, offset, reg) \
 168 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
 169 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
 170 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 171 { \
 172         struct i2c_client *client = to_i2c_client(dev); \
 173         struct fscher_data *data = i2c_get_clientdata(client); \
 174         return set_##kind##sub(client, data, buf, count, (offset), reg); \
 175 }
 176
 177 #define sysfs_rw_n(kind, sub, offset, reg) \
 178 sysfs_r(kind, sub, offset, reg) \
 179 sysfs_w(kind, sub, offset, reg) \
 180 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
 181
 182 #define sysfs_rw(kind, sub, reg) \
 183 sysfs_r(kind, sub, 0, reg) \
 184 sysfs_w(kind, sub, 0, reg) \
 185 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
 186
 187 #define sysfs_ro_n(kind, sub, offset, reg) \
 188 sysfs_r(kind, sub, offset, reg) \
 189 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
 190
 191 #define sysfs_ro(kind, sub, reg) \
 192 sysfs_r(kind, sub, 0, reg) \
 193 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
 194
 195 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
 196 sysfs_rw_n(pwm,        , offset, reg_min) \
 197 sysfs_rw_n(fan, _status, offset, reg_status) \
 198 sysfs_rw_n(fan, _div   , offset, reg_ripple) \
 199 sysfs_ro_n(fan, _input , offset, reg_act)
 200
 201 #define sysfs_temp(offset, reg_status, reg_act) \
 202 sysfs_rw_n(temp, _status, offset, reg_status) \
 203 sysfs_ro_n(temp, _input , offset, reg_act)
 204
 205 #define sysfs_in(offset, reg_act) \
 206 sysfs_ro_n(in, _input, offset, reg_act)
 207
 208 #define sysfs_revision(reg_revision) \
 209 sysfs_ro(revision, , reg_revision)
 210
 211 #define sysfs_alarms(reg_events) \
 212 sysfs_ro(alarms, , reg_events)
 213
 214 #define sysfs_control(reg_control) \
 215 sysfs_rw(control, , reg_control)
 216
 217 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
 218 sysfs_rw(watchdog, _control, reg_control) \
 219 sysfs_rw(watchdog, _status , reg_status) \
 220 sysfs_rw(watchdog, _preset , reg_preset)
 221
 222 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
 223              FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
 224 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
 225              FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
 226 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
 227              FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
 228
 229 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
 230 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
 231 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
 232
 233 sysfs_in(0, FSCHER_REG_VOLT_12)
 234 sysfs_in(1, FSCHER_REG_VOLT_5)
 235 sysfs_in(2, FSCHER_REG_VOLT_BATT)
 236
 237 sysfs_revision(FSCHER_REG_REVISION)
 238 sysfs_alarms(FSCHER_REG_EVENTS)
 239 sysfs_control(FSCHER_REG_CONTROL)
 240 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
 241
 242 #define device_create_file_fan(client, offset) \
 243 do { \
 244         device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
 245         device_create_file(&client->dev, &dev_attr_pwm##offset); \
 246         device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 247         device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 248 } while (0)
 249
 250 #define device_create_file_temp(client, offset) \
 251 do { \
 252         device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
 253         device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
 254 } while (0)
 255
 256 #define device_create_file_in(client, offset) \
 257 do { \
 258         device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 259 } while (0)
 260
 261 #define device_create_file_revision(client) \
 262 do { \
 263         device_create_file(&client->dev, &dev_attr_revision); \
 264 } while (0)
 265
 266 #define device_create_file_alarms(client) \
 267 do { \
 268         device_create_file(&client->dev, &dev_attr_alarms); \
 269 } while (0)
 270
 271 #define device_create_file_control(client) \
 272 do { \
 273         device_create_file(&client->dev, &dev_attr_control); \
 274 } while (0)
 275
 276 #define device_create_file_watchdog(client) \
 277 do { \
 278         device_create_file(&client->dev, &dev_attr_watchdog_status); \
 279         device_create_file(&client->dev, &dev_attr_watchdog_control); \
 280         device_create_file(&client->dev, &dev_attr_watchdog_preset); \
 281 } while (0)
 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         init_MUTEX(&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         data->class_dev = hwmon_device_register(&new_client->dev);
 345         if (IS_ERR(data->class_dev)) {
 346                 err = PTR_ERR(data->class_dev);
 347                 goto exit_detach;
 348         }
 349
 350         device_create_file_revision(new_client);
 351         device_create_file_alarms(new_client);
 352         device_create_file_control(new_client);
 353         device_create_file_watchdog(new_client);
 354
 355         device_create_file_in(new_client, 0);
 356         device_create_file_in(new_client, 1);
 357         device_create_file_in(new_client, 2);
 358
 359         device_create_file_fan(new_client, 1);
 360         device_create_file_fan(new_client, 2);
 361         device_create_file_fan(new_client, 3);
 362
 363         device_create_file_temp(new_client, 1);
 364         device_create_file_temp(new_client, 2);
 365         device_create_file_temp(new_client, 3);
 366
 367         return 0;
 368
 369 exit_detach:
 370         i2c_detach_client(new_client);
 371 exit_free:
 372         kfree(data);
 373 exit:
 374         return err;
 375 }
 376
 377 static int fscher_detach_client(struct i2c_client *client)
 378 {
 379         struct fscher_data *data = i2c_get_clientdata(client);
 380         int err;
 381
 382         hwmon_device_unregister(data->class_dev);
 383
 384         if ((err = i2c_detach_client(client)))
 385                 return err;
 386
 387         kfree(data);
 388         return 0;
 389 }
 390
 391 static int fscher_read_value(struct i2c_client *client, u8 reg)
 392 {
 393         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 394
 395         return i2c_smbus_read_byte_data(client, reg);
 396 }
 397
 398 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 399 {
 400         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 401                 reg, value);
 402
 403         return i2c_smbus_write_byte_data(client, reg, value);
 404 }
 405
 406 /* Called when we have found a new FSC Hermes. */
 407 static void fscher_init_client(struct i2c_client *client)
 408 {
 409         struct fscher_data *data = i2c_get_clientdata(client);
 410
 411         /* Read revision from chip */
 412         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 413 }
 414
 415 static struct fscher_data *fscher_update_device(struct device *dev)
 416 {
 417         struct i2c_client *client = to_i2c_client(dev);
 418         struct fscher_data *data = i2c_get_clientdata(client);
 419
 420         down(&data->update_lock);
 421
 422         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 423
 424                 dev_dbg(&client->dev, "Starting fscher update\n");
 425
 426                 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
 427                 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
 428                 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
 429                 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
 430                 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
 431                 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
 432
 433                 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
 434                 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
 435                 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
 436
 437                 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
 438                 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
 439                 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
 440                 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
 441                 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
 442                 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
 443                 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
 444                 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
 445                 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
 446                 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
 447                 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
 448                 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
 449
 450                 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
 451                 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
 452                 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
 453
 454                 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
 455
 456                 data->last_updated = jiffies;
 457                 data->valid = 1;
 458         }
 459
 460         up(&data->update_lock);
 461
 462         return data;
 463 }
 464
 465
 466
 467 #define FAN_INDEX_FROM_NUM(nr)  ((nr) - 1)
 468
 469 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
 470                               const char *buf, size_t count, int nr, int reg)
 471 {
 472         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 473         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
 474
 475         down(&data->update_lock);
 476         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 477         fscher_write_value(client, reg, v);
 478         up(&data->update_lock);
 479         return count;
 480 }
 481
 482 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
 483 {
 484         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 485         return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
 486 }
 487
 488 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
 489                        const char *buf, size_t count, int nr, int reg)
 490 {
 491         unsigned long v = simple_strtoul(buf, NULL, 10);
 492
 493         down(&data->update_lock);
 494         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
 495         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 496         up(&data->update_lock);
 497         return count;
 498 }
 499
 500 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
 501 {
 502         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 503 }
 504
 505 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 506                            const char *buf, size_t count, int nr, int reg)
 507 {
 508         /* supported values: 2, 4, 8 */
 509         unsigned long v = simple_strtoul(buf, NULL, 10);
 510
 511         switch (v) {
 512         case 2: v = 1; break;
 513         case 4: v = 2; break;
 514         case 8: v = 3; break;
 515         default:
 516                 dev_err(&client->dev, "fan_div value %ld not "
 517                          "supported. Choose one of 2, 4 or 8!\n", v);
 518                 return -EINVAL;
 519         }
 520
 521         down(&data->update_lock);
 522
 523         /* bits 2..7 reserved => mask with 0x03 */
 524         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 525         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 526
 527         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 528         up(&data->update_lock);
 529         return count;
 530 }
 531
 532 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 533 {
 534         /* bits 2..7 reserved => mask with 0x03 */
 535         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 536 }
 537
 538 #define RPM_FROM_REG(val)       (val*60)
 539
 540 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 541 {
 542         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 543 }
 544
 545
 546
 547 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 548
 549 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 550                                const char *buf, size_t count, int nr, int reg)
 551 {
 552         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 553         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 554
 555         down(&data->update_lock);
 556         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 557         fscher_write_value(client, reg, v);
 558         up(&data->update_lock);
 559         return count;
 560 }
 561
 562 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
 563 {
 564         /* bits 2..7 reserved => mask with 0x03 */
 565         return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
 566 }
 567
 568 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
 569
 570 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
 571 {
 572         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
 573 }
 574
 575 /*
 576  * The final conversion is specified in sensors.conf, as it depends on
 577  * mainboard specific values. We export the registers contents as
 578  * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 579  * sense per se, but it minimizes the conversions count and keeps the
 580  * values within a usual range.
 581  */
 582 #define VOLT_FROM_REG(val)      ((val) * 10)
 583
 584 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
 585 {
 586         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
 587 }
 588
 589
 590
 591 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
 592 {
 593         return sprintf(buf, "%u\n", data->revision);
 594 }
 595
 596
 597
 598 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
 599 {
 600         /* bits 2, 5..6 reserved => mask with 0x9b */
 601         return sprintf(buf, "%u\n", data->global_event & 0x9b);
 602 }
 603
 604
 605
 606 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
 607                            const char *buf, size_t count, int nr, int reg)
 608 {
 609         /* bits 1..7 reserved => mask with 0x01 */
 610         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
 611
 612         down(&data->update_lock);
 613         data->global_control &= ~v;
 614         fscher_write_value(client, reg, v);
 615         up(&data->update_lock);
 616         return count;
 617 }
 618
 619 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 620 {
 621         /* bits 1..7 reserved => mask with 0x01 */
 622         return sprintf(buf, "%u\n", data->global_control & 0x01);
 623 }
 624
 625
 626
 627 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 628                                     fscher_data *data, const char *buf, size_t count,
 629                                     int nr, int reg)
 630 {
 631         /* bits 0..3 reserved => mask with 0xf0 */
 632         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 633
 634         down(&data->update_lock);
 635         data->watchdog[2] &= ~0xf0;
 636         data->watchdog[2] |= v;
 637         fscher_write_value(client, reg, data->watchdog[2]);
 638         up(&data->update_lock);
 639         return count;
 640 }
 641
 642 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 643 {
 644         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 645         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 646 }
 647
 648 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 649                                    const char *buf, size_t count, int nr, int reg)
 650 {
 651         /* bits 0, 2..7 reserved => mask with 0x02 */
 652         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 653
 654         down(&data->update_lock);
 655         data->watchdog[1] &= ~v;
 656         fscher_write_value(client, reg, v);
 657         up(&data->update_lock);
 658         return count;
 659 }
 660
 661 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 662 {
 663         /* bits 0, 2..7 reserved => mask with 0x02 */
 664         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 665 }
 666
 667 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 668                                    const char *buf, size_t count, int nr, int reg)
 669 {
 670         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
 671
 672         down(&data->update_lock);
 673         data->watchdog[0] = v;
 674         fscher_write_value(client, reg, data->watchdog[0]);
 675         up(&data->update_lock);
 676         return count;
 677 }
 678
 679 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 680 {
 681         return sprintf(buf, "%u\n", data->watchdog[0]);
 682 }
 683
 684 static int __init sensors_fscher_init(void)
 685 {
 686         return i2c_add_driver(&fscher_driver);
 687 }
 688
 689 static void __exit sensors_fscher_exit(void)
 690 {
 691         i2c_del_driver(&fscher_driver);
 692 }
 693
 694 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 695 MODULE_DESCRIPTION("FSC Hermes driver");
 696 MODULE_LICENSE("GPL");
 697
 698 module_init(sensors_fscher_init);
 699 module_exit(sensors_fscher_exit);