drivers/i2c/chips/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/config.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/i2c.h>
  34 #include <linux/i2c-sensor.h>
  35
  36 /*
  37  * Addresses to scan
  38  */
  39
  40 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  41 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
  42 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  43 static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
  44
  45 /*
  46  * Insmod parameters
  47  */
  48
  49 SENSORS_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         .owner          = THIS_MODULE,
 124         .name           = "fscher",
 125         .id             = I2C_DRIVERID_FSCHER,
 126         .flags          = I2C_DF_NOTIFY,
 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 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  * Internal variables
 157  */
 158
 159 static int fscher_id = 0;
 160
 161 /*
 162  * Sysfs stuff
 163  */
 164
 165 #define sysfs_r(kind, sub, offset, reg) \
 166 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
 167 static ssize_t show_##kind##offset##sub (struct device *, char *); \
 168 static ssize_t show_##kind##offset##sub (struct device *dev, char *buf) \
 169 { \
 170         struct fscher_data *data = fscher_update_device(dev); \
 171         return show_##kind##sub(data, buf, (offset)); \
 172 }
 173
 174 #define sysfs_w(kind, sub, offset, reg) \
 175 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
 176 static ssize_t set_##kind##offset##sub (struct device *, const char *, size_t); \
 177 static ssize_t set_##kind##offset##sub (struct device *dev, const char *buf, size_t count) \
 178 { \
 179         struct i2c_client *client = to_i2c_client(dev); \
 180         struct fscher_data *data = i2c_get_clientdata(client); \
 181         return set_##kind##sub(client, data, buf, count, (offset), reg); \
 182 }
 183
 184 #define sysfs_rw_n(kind, sub, offset, reg) \
 185 sysfs_r(kind, sub, offset, reg) \
 186 sysfs_w(kind, sub, offset, reg) \
 187 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
 188
 189 #define sysfs_rw(kind, sub, reg) \
 190 sysfs_r(kind, sub, 0, reg) \
 191 sysfs_w(kind, sub, 0, reg) \
 192 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
 193
 194 #define sysfs_ro_n(kind, sub, offset, reg) \
 195 sysfs_r(kind, sub, offset, reg) \
 196 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
 197
 198 #define sysfs_ro(kind, sub, reg) \
 199 sysfs_r(kind, sub, 0, reg) \
 200 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
 201
 202 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
 203 sysfs_rw_n(fan, _pwm   , offset, reg_min) \
 204 sysfs_rw_n(fan, _status, offset, reg_status) \
 205 sysfs_rw_n(fan, _div   , offset, reg_ripple) \
 206 sysfs_ro_n(fan, _input , offset, reg_act)
 207
 208 #define sysfs_temp(offset, reg_status, reg_act) \
 209 sysfs_rw_n(temp, _status, offset, reg_status) \
 210 sysfs_ro_n(temp, _input , offset, reg_act)
 211
 212 #define sysfs_in(offset, reg_act) \
 213 sysfs_ro_n(in, _input, offset, reg_act)
 214
 215 #define sysfs_revision(reg_revision) \
 216 sysfs_ro(revision, , reg_revision)
 217
 218 #define sysfs_alarms(reg_events) \
 219 sysfs_ro(alarms, , reg_events)
 220
 221 #define sysfs_control(reg_control) \
 222 sysfs_rw(control, , reg_control)
 223
 224 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
 225 sysfs_rw(watchdog, _control, reg_control) \
 226 sysfs_rw(watchdog, _status , reg_status) \
 227 sysfs_rw(watchdog, _preset , reg_preset)
 228
 229 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
 230              FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
 231 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
 232              FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
 233 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
 234              FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
 235
 236 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
 237 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
 238 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
 239
 240 sysfs_in(0, FSCHER_REG_VOLT_12)
 241 sysfs_in(1, FSCHER_REG_VOLT_5)
 242 sysfs_in(2, FSCHER_REG_VOLT_BATT)
 243
 244 sysfs_revision(FSCHER_REG_REVISION)
 245 sysfs_alarms(FSCHER_REG_EVENTS)
 246 sysfs_control(FSCHER_REG_CONTROL)
 247 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
 248
 249 #define device_create_file_fan(client, offset) \
 250 do { \
 251         device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
 252         device_create_file(&client->dev, &dev_attr_fan##offset##_pwm); \
 253         device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 254         device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 255 } while (0)
 256
 257 #define device_create_file_temp(client, offset) \
 258 do { \
 259         device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
 260         device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
 261 } while (0)
 262
 263 #define device_create_file_in(client, offset) \
 264 do { \
 265         device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 266 } while (0)
 267
 268 #define device_create_file_revision(client) \
 269 do { \
 270         device_create_file(&client->dev, &dev_attr_revision); \
 271 } while (0)
 272
 273 #define device_create_file_alarms(client) \
 274 do { \
 275         device_create_file(&client->dev, &dev_attr_alarms); \
 276 } while (0)
 277
 278 #define device_create_file_control(client) \
 279 do { \
 280         device_create_file(&client->dev, &dev_attr_control); \
 281 } while (0)
 282
 283 #define device_create_file_watchdog(client) \
 284 do { \
 285         device_create_file(&client->dev, &dev_attr_watchdog_status); \
 286         device_create_file(&client->dev, &dev_attr_watchdog_control); \
 287         device_create_file(&client->dev, &dev_attr_watchdog_preset); \
 288 } while (0)
 289
 290 /*
 291  * Real code
 292  */
 293
 294 static int fscher_attach_adapter(struct i2c_adapter *adapter)
 295 {
 296         if (!(adapter->class & I2C_CLASS_HWMON))
 297                 return 0;
 298         return i2c_detect(adapter, &addr_data, fscher_detect);
 299 }
 300
 301 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
 302 {
 303         struct i2c_client *new_client;
 304         struct fscher_data *data;
 305         int err = 0;
 306
 307         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 308                 goto exit;
 309
 310         /* OK. For now, we presume we have a valid client. We now create the
 311          * client structure, even though we cannot fill it completely yet.
 312          * But it allows us to access i2c_smbus_read_byte_data. */
 313         if (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
 314                 err = -ENOMEM;
 315                 goto exit;
 316         }
 317         memset(data, 0, sizeof(struct fscher_data));
 318
 319         /* The common I2C client data is placed right before the
 320          * Hermes-specific data. */
 321         new_client = &data->client;
 322         i2c_set_clientdata(new_client, data);
 323         new_client->addr = address;
 324         new_client->adapter = adapter;
 325         new_client->driver = &fscher_driver;
 326         new_client->flags = 0;
 327
 328         /* Do the remaining detection unless force or force_fscher parameter */
 329         if (kind < 0) {
 330                 if ((i2c_smbus_read_byte_data(new_client,
 331                      FSCHER_REG_IDENT_0) != 0x48)       /* 'H' */
 332                  || (i2c_smbus_read_byte_data(new_client,
 333                      FSCHER_REG_IDENT_1) != 0x45)       /* 'E' */
 334                  || (i2c_smbus_read_byte_data(new_client,
 335                      FSCHER_REG_IDENT_2) != 0x52))      /* 'R' */
 336                         goto exit_free;
 337         }
 338
 339         /* Fill in the remaining client fields and put it into the
 340          * global list */
 341         strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
 342         new_client->id = fscher_id++;
 343         data->valid = 0;
 344         init_MUTEX(&data->update_lock);
 345
 346         /* Tell the I2C layer a new client has arrived */
 347         if ((err = i2c_attach_client(new_client)))
 348                 goto exit_free;
 349
 350         fscher_init_client(new_client);
 351
 352         /* Register sysfs hooks */
 353         device_create_file_revision(new_client);
 354         device_create_file_alarms(new_client);
 355         device_create_file_control(new_client);
 356         device_create_file_watchdog(new_client);
 357
 358         device_create_file_in(new_client, 0);
 359         device_create_file_in(new_client, 1);
 360         device_create_file_in(new_client, 2);
 361
 362         device_create_file_fan(new_client, 1);
 363         device_create_file_fan(new_client, 2);
 364         device_create_file_fan(new_client, 3);
 365
 366         device_create_file_temp(new_client, 1);
 367         device_create_file_temp(new_client, 2);
 368         device_create_file_temp(new_client, 3);
 369
 370         return 0;
 371
 372 exit_free:
 373         kfree(data);
 374 exit:
 375         return err;
 376 }
 377
 378 static int fscher_detach_client(struct i2c_client *client)
 379 {
 380         int err;
 381
 382         if ((err = i2c_detach_client(client))) {
 383                 dev_err(&client->dev, "Client deregistration failed, "
 384                         "client not detached.\n");
 385                 return err;
 386         }
 387
 388         kfree(i2c_get_clientdata(client));
 389         return 0;
 390 }
 391
 392 static int fscher_read_value(struct i2c_client *client, u8 reg)
 393 {
 394         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 395
 396         return i2c_smbus_read_byte_data(client, reg);
 397 }
 398
 399 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 400 {
 401         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 402                 reg, value);
 403
 404         return i2c_smbus_write_byte_data(client, reg, value);
 405 }
 406
 407 /* Called when we have found a new FSC Hermes. */
 408 static void fscher_init_client(struct i2c_client *client)
 409 {
 410         struct fscher_data *data = i2c_get_clientdata(client);
 411
 412         /* Read revision from chip */
 413         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 414 }
 415
 416 static struct fscher_data *fscher_update_device(struct device *dev)
 417 {
 418         struct i2c_client *client = to_i2c_client(dev);
 419         struct fscher_data *data = i2c_get_clientdata(client);
 420
 421         down(&data->update_lock);
 422
 423         if ((jiffies - data->last_updated > 2 * HZ) ||
 424             (jiffies < data->last_updated) || !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         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 477
 478         fscher_write_value(client, reg, v);
 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_fan_pwm(struct i2c_client *client, struct fscher_data *data,
 489                        const char *buf, size_t count, int nr, int reg)
 490 {
 491         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = simple_strtoul(buf, NULL, 10) & 0xff;
 492
 493         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 494         return count;
 495 }
 496
 497 static ssize_t show_fan_pwm (struct fscher_data *data, char *buf, int nr)
 498 {
 499         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 500 }
 501
 502 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 503                            const char *buf, size_t count, int nr, int reg)
 504 {
 505         /* supported values: 2, 4, 8 */
 506         unsigned long v = simple_strtoul(buf, NULL, 10);
 507
 508         switch (v) {
 509         case 2: v = 1; break;
 510         case 4: v = 2; break;
 511         case 8: v = 3; break;
 512         default:
 513                 dev_err(&client->dev, "fan_div value %ld not "
 514                          "supported. Choose one of 2, 4 or 8!\n", v);
 515                 return -EINVAL;
 516         }
 517
 518         /* bits 2..7 reserved => mask with 0x03 */
 519         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 520         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 521
 522         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 523         return count;
 524 }
 525
 526 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 527 {
 528         /* bits 2..7 reserved => mask with 0x03 */
 529         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 530 }
 531
 532 #define RPM_FROM_REG(val)       (val*60)
 533
 534 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 535 {
 536         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 537 }
 538
 539
 540
 541 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 542
 543 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 544                                const char *buf, size_t count, int nr, int reg)
 545 {
 546         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 547         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 548         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 549
 550         fscher_write_value(client, reg, v);
 551         return count;
 552 }
 553
 554 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
 555 {
 556         /* bits 2..7 reserved => mask with 0x03 */
 557         return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
 558 }
 559
 560 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
 561
 562 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
 563 {
 564         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
 565 }
 566
 567 /*
 568  * The final conversion is specified in sensors.conf, as it depends on
 569  * mainboard specific values. We export the registers contents as
 570  * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 571  * sense per se, but it minimizes the conversions count and keeps the
 572  * values within a usual range.
 573  */
 574 #define VOLT_FROM_REG(val)      ((val) * 10)
 575
 576 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
 577 {
 578         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
 579 }
 580
 581
 582
 583 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
 584 {
 585         return sprintf(buf, "%u\n", data->revision);
 586 }
 587
 588
 589
 590 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
 591 {
 592         /* bits 2, 5..6 reserved => mask with 0x9b */
 593         return sprintf(buf, "%u\n", data->global_event & 0x9b);
 594 }
 595
 596
 597
 598 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
 599                            const char *buf, size_t count, int nr, int reg)
 600 {
 601         /* bits 1..7 reserved => mask with 0x01 */
 602         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
 603         data->global_control &= ~v;
 604
 605         fscher_write_value(client, reg, v);
 606         return count;
 607 }
 608
 609 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 610 {
 611         /* bits 1..7 reserved => mask with 0x01 */
 612         return sprintf(buf, "%u\n", data->global_control & 0x01);
 613 }
 614
 615
 616
 617 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 618                                     fscher_data *data, const char *buf, size_t count,
 619                                     int nr, int reg)
 620 {
 621         /* bits 0..3 reserved => mask with 0xf0 */
 622         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 623         data->watchdog[2] &= ~0xf0;
 624         data->watchdog[2] |= v;
 625
 626         fscher_write_value(client, reg, data->watchdog[2]);
 627         return count;
 628 }
 629
 630 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 631 {
 632         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 633         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 634 }
 635
 636 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 637                                    const char *buf, size_t count, int nr, int reg)
 638 {
 639         /* bits 0, 2..7 reserved => mask with 0x02 */
 640         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 641         data->watchdog[1] &= ~v;
 642
 643         fscher_write_value(client, reg, v);
 644         return count;
 645 }
 646
 647 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 648 {
 649         /* bits 0, 2..7 reserved => mask with 0x02 */
 650         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 651 }
 652
 653 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 654                                    const char *buf, size_t count, int nr, int reg)
 655 {
 656         data->watchdog[0] = simple_strtoul(buf, NULL, 10) & 0xff;
 657
 658         fscher_write_value(client, reg, data->watchdog[0]);
 659         return count;
 660 }
 661
 662 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 663 {
 664         return sprintf(buf, "%u\n", data->watchdog[0]);
 665 }
 666
 667 static int __init sensors_fscher_init(void)
 668 {
 669         return i2c_add_driver(&fscher_driver);
 670 }
 671
 672 static void __exit sensors_fscher_exit(void)
 673 {
 674         i2c_del_driver(&fscher_driver);
 675 }
 676
 677 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 678 MODULE_DESCRIPTION("FSC Hermes driver");
 679 MODULE_LICENSE("GPL");
 680
 681 module_init(sensors_fscher_init);
 682 module_exit(sensors_fscher_exit);