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/jiffies.h>
  34 #include <linux/i2c.h>
  35 #include <linux/i2c-sensor.h>
  36
  37 /*
  38  * Addresses to scan
  39  */
  40
  41 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  42 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_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 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 *, char *); \
 161 static ssize_t show_##kind##offset##sub (struct device *dev, 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 *, const char *, size_t); \
 170 static ssize_t set_##kind##offset##sub (struct device *dev, 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_detect(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 = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
 307                 err = -ENOMEM;
 308                 goto exit;
 309         }
 310         memset(data, 0, sizeof(struct fscher_data));
 311
 312         /* The common I2C client data is placed right before the
 313          * Hermes-specific data. */
 314         new_client = &data->client;
 315         i2c_set_clientdata(new_client, data);
 316         new_client->addr = address;
 317         new_client->adapter = adapter;
 318         new_client->driver = &fscher_driver;
 319         new_client->flags = 0;
 320
 321         /* Do the remaining detection unless force or force_fscher parameter */
 322         if (kind < 0) {
 323                 if ((i2c_smbus_read_byte_data(new_client,
 324                      FSCHER_REG_IDENT_0) != 0x48)       /* 'H' */
 325                  || (i2c_smbus_read_byte_data(new_client,
 326                      FSCHER_REG_IDENT_1) != 0x45)       /* 'E' */
 327                  || (i2c_smbus_read_byte_data(new_client,
 328                      FSCHER_REG_IDENT_2) != 0x52))      /* 'R' */
 329                         goto exit_free;
 330         }
 331
 332         /* Fill in the remaining client fields and put it into the
 333          * global list */
 334         strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
 335         data->valid = 0;
 336         init_MUTEX(&data->update_lock);
 337
 338         /* Tell the I2C layer a new client has arrived */
 339         if ((err = i2c_attach_client(new_client)))
 340                 goto exit_free;
 341
 342         fscher_init_client(new_client);
 343
 344         /* Register sysfs hooks */
 345         device_create_file_revision(new_client);
 346         device_create_file_alarms(new_client);
 347         device_create_file_control(new_client);
 348         device_create_file_watchdog(new_client);
 349
 350         device_create_file_in(new_client, 0);
 351         device_create_file_in(new_client, 1);
 352         device_create_file_in(new_client, 2);
 353
 354         device_create_file_fan(new_client, 1);
 355         device_create_file_fan(new_client, 2);
 356         device_create_file_fan(new_client, 3);
 357
 358         device_create_file_temp(new_client, 1);
 359         device_create_file_temp(new_client, 2);
 360         device_create_file_temp(new_client, 3);
 361
 362         return 0;
 363
 364 exit_free:
 365         kfree(data);
 366 exit:
 367         return err;
 368 }
 369
 370 static int fscher_detach_client(struct i2c_client *client)
 371 {
 372         int err;
 373
 374         if ((err = i2c_detach_client(client))) {
 375                 dev_err(&client->dev, "Client deregistration failed, "
 376                         "client not detached.\n");
 377                 return err;
 378         }
 379
 380         kfree(i2c_get_clientdata(client));
 381         return 0;
 382 }
 383
 384 static int fscher_read_value(struct i2c_client *client, u8 reg)
 385 {
 386         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 387
 388         return i2c_smbus_read_byte_data(client, reg);
 389 }
 390
 391 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 392 {
 393         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 394                 reg, value);
 395
 396         return i2c_smbus_write_byte_data(client, reg, value);
 397 }
 398
 399 /* Called when we have found a new FSC Hermes. */
 400 static void fscher_init_client(struct i2c_client *client)
 401 {
 402         struct fscher_data *data = i2c_get_clientdata(client);
 403
 404         /* Read revision from chip */
 405         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 406 }
 407
 408 static struct fscher_data *fscher_update_device(struct device *dev)
 409 {
 410         struct i2c_client *client = to_i2c_client(dev);
 411         struct fscher_data *data = i2c_get_clientdata(client);
 412
 413         down(&data->update_lock);
 414
 415         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 416
 417                 dev_dbg(&client->dev, "Starting fscher update\n");
 418
 419                 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
 420                 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
 421                 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
 422                 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
 423                 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
 424                 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
 425
 426                 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
 427                 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
 428                 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
 429
 430                 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
 431                 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
 432                 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
 433                 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
 434                 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
 435                 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
 436                 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
 437                 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
 438                 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
 439                 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
 440                 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
 441                 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
 442
 443                 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
 444                 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
 445                 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
 446
 447                 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
 448
 449                 data->last_updated = jiffies;
 450                 data->valid = 1;
 451         }
 452
 453         up(&data->update_lock);
 454
 455         return data;
 456 }
 457
 458
 459
 460 #define FAN_INDEX_FROM_NUM(nr)  ((nr) - 1)
 461
 462 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
 463                               const char *buf, size_t count, int nr, int reg)
 464 {
 465         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 466         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
 467
 468         down(&data->update_lock);
 469         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 470         fscher_write_value(client, reg, v);
 471         up(&data->update_lock);
 472         return count;
 473 }
 474
 475 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
 476 {
 477         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 478         return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
 479 }
 480
 481 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
 482                        const char *buf, size_t count, int nr, int reg)
 483 {
 484         unsigned long v = simple_strtoul(buf, NULL, 10);
 485
 486         down(&data->update_lock);
 487         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
 488         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 489         up(&data->update_lock);
 490         return count;
 491 }
 492
 493 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
 494 {
 495         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 496 }
 497
 498 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 499                            const char *buf, size_t count, int nr, int reg)
 500 {
 501         /* supported values: 2, 4, 8 */
 502         unsigned long v = simple_strtoul(buf, NULL, 10);
 503
 504         switch (v) {
 505         case 2: v = 1; break;
 506         case 4: v = 2; break;
 507         case 8: v = 3; break;
 508         default:
 509                 dev_err(&client->dev, "fan_div value %ld not "
 510                          "supported. Choose one of 2, 4 or 8!\n", v);
 511                 return -EINVAL;
 512         }
 513
 514         down(&data->update_lock);
 515
 516         /* bits 2..7 reserved => mask with 0x03 */
 517         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 518         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 519
 520         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 521         up(&data->update_lock);
 522         return count;
 523 }
 524
 525 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 526 {
 527         /* bits 2..7 reserved => mask with 0x03 */
 528         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 529 }
 530
 531 #define RPM_FROM_REG(val)       (val*60)
 532
 533 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 534 {
 535         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 536 }
 537
 538
 539
 540 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 541
 542 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 543                                const char *buf, size_t count, int nr, int reg)
 544 {
 545         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 546         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 547
 548         down(&data->update_lock);
 549         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 550         fscher_write_value(client, reg, v);
 551         up(&data->update_lock);
 552         return count;
 553 }
 554
 555 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
 556 {
 557         /* bits 2..7 reserved => mask with 0x03 */
 558         return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
 559 }
 560
 561 #define TEMP_FROM_REG(val)      (((val) - 128) * 1000)
 562
 563 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
 564 {
 565         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
 566 }
 567
 568 /*
 569  * The final conversion is specified in sensors.conf, as it depends on
 570  * mainboard specific values. We export the registers contents as
 571  * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
 572  * sense per se, but it minimizes the conversions count and keeps the
 573  * values within a usual range.
 574  */
 575 #define VOLT_FROM_REG(val)      ((val) * 10)
 576
 577 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
 578 {
 579         return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
 580 }
 581
 582
 583
 584 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
 585 {
 586         return sprintf(buf, "%u\n", data->revision);
 587 }
 588
 589
 590
 591 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
 592 {
 593         /* bits 2, 5..6 reserved => mask with 0x9b */
 594         return sprintf(buf, "%u\n", data->global_event & 0x9b);
 595 }
 596
 597
 598
 599 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
 600                            const char *buf, size_t count, int nr, int reg)
 601 {
 602         /* bits 1..7 reserved => mask with 0x01 */
 603         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
 604
 605         down(&data->update_lock);
 606         data->global_control &= ~v;
 607         fscher_write_value(client, reg, v);
 608         up(&data->update_lock);
 609         return count;
 610 }
 611
 612 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 613 {
 614         /* bits 1..7 reserved => mask with 0x01 */
 615         return sprintf(buf, "%u\n", data->global_control & 0x01);
 616 }
 617
 618
 619
 620 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 621                                     fscher_data *data, const char *buf, size_t count,
 622                                     int nr, int reg)
 623 {
 624         /* bits 0..3 reserved => mask with 0xf0 */
 625         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 626
 627         down(&data->update_lock);
 628         data->watchdog[2] &= ~0xf0;
 629         data->watchdog[2] |= v;
 630         fscher_write_value(client, reg, data->watchdog[2]);
 631         up(&data->update_lock);
 632         return count;
 633 }
 634
 635 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 636 {
 637         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 638         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 639 }
 640
 641 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 642                                    const char *buf, size_t count, int nr, int reg)
 643 {
 644         /* bits 0, 2..7 reserved => mask with 0x02 */
 645         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 646
 647         down(&data->update_lock);
 648         data->watchdog[1] &= ~v;
 649         fscher_write_value(client, reg, v);
 650         up(&data->update_lock);
 651         return count;
 652 }
 653
 654 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 655 {
 656         /* bits 0, 2..7 reserved => mask with 0x02 */
 657         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 658 }
 659
 660 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 661                                    const char *buf, size_t count, int nr, int reg)
 662 {
 663         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
 664
 665         down(&data->update_lock);
 666         data->watchdog[0] = v;
 667         fscher_write_value(client, reg, data->watchdog[0]);
 668         up(&data->update_lock);
 669         return count;
 670 }
 671
 672 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 673 {
 674         return sprintf(buf, "%u\n", data->watchdog[0]);
 675 }
 676
 677 static int __init sensors_fscher_init(void)
 678 {
 679         return i2c_add_driver(&fscher_driver);
 680 }
 681
 682 static void __exit sensors_fscher_exit(void)
 683 {
 684         i2c_del_driver(&fscher_driver);
 685 }
 686
 687 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 688 MODULE_DESCRIPTION("FSC Hermes driver");
 689 MODULE_LICENSE("GPL");
 690
 691 module_init(sensors_fscher_init);
 692 module_exit(sensors_fscher_exit);