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/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
  36 /*
  37  * Addresses to scan
  38  */
  39
  40 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  41 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  42
  43 /*
  44  * Insmod parameters
  45  */
  46
  47 SENSORS_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 semaphore update_lock;
 136         char valid; /* zero until following fields are valid */
 137         unsigned long last_updated; /* in jiffies */
 138
 139         /* register values */
 140         u8 revision;            /* revision of chip */
 141         u8 global_event;        /* global event status */
 142         u8 global_control;      /* global control register */
 143         u8 watchdog[3];         /* watchdog */
 144         u8 volt[3];             /* 12, 5, battery voltage */
 145         u8 temp_act[3];         /* temperature */
 146         u8 temp_status[3];      /* status of sensor */
 147         u8 fan_act[3];          /* fans revolutions per second */
 148         u8 fan_status[3];       /* fan status */
 149         u8 fan_min[3];          /* fan min value for rps */
 150         u8 fan_ripple[3];       /* divider for rps */
 151 };
 152
 153 /*
 154  * Sysfs stuff
 155  */
 156
 157 #define sysfs_r(kind, sub, offset, reg) \
 158 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
 159 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
 160 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
 161 { \
 162         struct fscher_data *data = fscher_update_device(dev); \
 163         return show_##kind##sub(data, buf, (offset)); \
 164 }
 165
 166 #define sysfs_w(kind, sub, offset, reg) \
 167 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
 168 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
 169 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
 170 { \
 171         struct i2c_client *client = to_i2c_client(dev); \
 172         struct fscher_data *data = i2c_get_clientdata(client); \
 173         return set_##kind##sub(client, data, buf, count, (offset), reg); \
 174 }
 175
 176 #define sysfs_rw_n(kind, sub, offset, reg) \
 177 sysfs_r(kind, sub, offset, reg) \
 178 sysfs_w(kind, sub, offset, reg) \
 179 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
 180
 181 #define sysfs_rw(kind, sub, reg) \
 182 sysfs_r(kind, sub, 0, reg) \
 183 sysfs_w(kind, sub, 0, reg) \
 184 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
 185
 186 #define sysfs_ro_n(kind, sub, offset, reg) \
 187 sysfs_r(kind, sub, offset, reg) \
 188 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
 189
 190 #define sysfs_ro(kind, sub, reg) \
 191 sysfs_r(kind, sub, 0, reg) \
 192 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
 193
 194 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
 195 sysfs_rw_n(pwm,        , offset, reg_min) \
 196 sysfs_rw_n(fan, _status, offset, reg_status) \
 197 sysfs_rw_n(fan, _div   , offset, reg_ripple) \
 198 sysfs_ro_n(fan, _input , offset, reg_act)
 199
 200 #define sysfs_temp(offset, reg_status, reg_act) \
 201 sysfs_rw_n(temp, _status, offset, reg_status) \
 202 sysfs_ro_n(temp, _input , offset, reg_act)
 203
 204 #define sysfs_in(offset, reg_act) \
 205 sysfs_ro_n(in, _input, offset, reg_act)
 206
 207 #define sysfs_revision(reg_revision) \
 208 sysfs_ro(revision, , reg_revision)
 209
 210 #define sysfs_alarms(reg_events) \
 211 sysfs_ro(alarms, , reg_events)
 212
 213 #define sysfs_control(reg_control) \
 214 sysfs_rw(control, , reg_control)
 215
 216 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
 217 sysfs_rw(watchdog, _control, reg_control) \
 218 sysfs_rw(watchdog, _status , reg_status) \
 219 sysfs_rw(watchdog, _preset , reg_preset)
 220
 221 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
 222              FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
 223 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
 224              FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
 225 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
 226              FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
 227
 228 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
 229 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
 230 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
 231
 232 sysfs_in(0, FSCHER_REG_VOLT_12)
 233 sysfs_in(1, FSCHER_REG_VOLT_5)
 234 sysfs_in(2, FSCHER_REG_VOLT_BATT)
 235
 236 sysfs_revision(FSCHER_REG_REVISION)
 237 sysfs_alarms(FSCHER_REG_EVENTS)
 238 sysfs_control(FSCHER_REG_CONTROL)
 239 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
 240
 241 #define device_create_file_fan(client, offset) \
 242 do { \
 243         device_create_file(&client->dev, &dev_attr_fan##offset##_status); \
 244         device_create_file(&client->dev, &dev_attr_pwm##offset); \
 245         device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 246         device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 247 } while (0)
 248
 249 #define device_create_file_temp(client, offset) \
 250 do { \
 251         device_create_file(&client->dev, &dev_attr_temp##offset##_status); \
 252         device_create_file(&client->dev, &dev_attr_temp##offset##_input); \
 253 } while (0)
 254
 255 #define device_create_file_in(client, offset) \
 256 do { \
 257         device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 258 } while (0)
 259
 260 #define device_create_file_revision(client) \
 261 do { \
 262         device_create_file(&client->dev, &dev_attr_revision); \
 263 } while (0)
 264
 265 #define device_create_file_alarms(client) \
 266 do { \
 267         device_create_file(&client->dev, &dev_attr_alarms); \
 268 } while (0)
 269
 270 #define device_create_file_control(client) \
 271 do { \
 272         device_create_file(&client->dev, &dev_attr_control); \
 273 } while (0)
 274
 275 #define device_create_file_watchdog(client) \
 276 do { \
 277         device_create_file(&client->dev, &dev_attr_watchdog_status); \
 278         device_create_file(&client->dev, &dev_attr_watchdog_control); \
 279         device_create_file(&client->dev, &dev_attr_watchdog_preset); \
 280 } while (0)
 281
 282 /*
 283  * Real code
 284  */
 285
 286 static int fscher_attach_adapter(struct i2c_adapter *adapter)
 287 {
 288         if (!(adapter->class & I2C_CLASS_HWMON))
 289                 return 0;
 290         return i2c_detect(adapter, &addr_data, fscher_detect);
 291 }
 292
 293 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
 294 {
 295         struct i2c_client *new_client;
 296         struct fscher_data *data;
 297         int err = 0;
 298
 299         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 300                 goto exit;
 301
 302         /* OK. For now, we presume we have a valid client. We now create the
 303          * client structure, even though we cannot fill it completely yet.
 304          * But it allows us to access i2c_smbus_read_byte_data. */
 305         if (!(data = kmalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
 306                 err = -ENOMEM;
 307                 goto exit;
 308         }
 309         memset(data, 0, sizeof(struct fscher_data));
 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         device_create_file_revision(new_client);
 345         device_create_file_alarms(new_client);
 346         device_create_file_control(new_client);
 347         device_create_file_watchdog(new_client);
 348
 349         device_create_file_in(new_client, 0);
 350         device_create_file_in(new_client, 1);
 351         device_create_file_in(new_client, 2);
 352
 353         device_create_file_fan(new_client, 1);
 354         device_create_file_fan(new_client, 2);
 355         device_create_file_fan(new_client, 3);
 356
 357         device_create_file_temp(new_client, 1);
 358         device_create_file_temp(new_client, 2);
 359         device_create_file_temp(new_client, 3);
 360
 361         return 0;
 362
 363 exit_free:
 364         kfree(data);
 365 exit:
 366         return err;
 367 }
 368
 369 static int fscher_detach_client(struct i2c_client *client)
 370 {
 371         int err;
 372
 373         if ((err = i2c_detach_client(client))) {
 374                 dev_err(&client->dev, "Client deregistration failed, "
 375                         "client not detached.\n");
 376                 return err;
 377         }
 378
 379         kfree(i2c_get_clientdata(client));
 380         return 0;
 381 }
 382
 383 static int fscher_read_value(struct i2c_client *client, u8 reg)
 384 {
 385         dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
 386
 387         return i2c_smbus_read_byte_data(client, reg);
 388 }
 389
 390 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
 391 {
 392         dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
 393                 reg, value);
 394
 395         return i2c_smbus_write_byte_data(client, reg, value);
 396 }
 397
 398 /* Called when we have found a new FSC Hermes. */
 399 static void fscher_init_client(struct i2c_client *client)
 400 {
 401         struct fscher_data *data = i2c_get_clientdata(client);
 402
 403         /* Read revision from chip */
 404         data->revision =  fscher_read_value(client, FSCHER_REG_REVISION);
 405 }
 406
 407 static struct fscher_data *fscher_update_device(struct device *dev)
 408 {
 409         struct i2c_client *client = to_i2c_client(dev);
 410         struct fscher_data *data = i2c_get_clientdata(client);
 411
 412         down(&data->update_lock);
 413
 414         if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 415
 416                 dev_dbg(&client->dev, "Starting fscher update\n");
 417
 418                 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
 419                 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
 420                 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
 421                 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
 422                 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
 423                 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
 424
 425                 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
 426                 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
 427                 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
 428
 429                 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
 430                 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
 431                 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
 432                 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
 433                 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
 434                 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
 435                 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
 436                 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
 437                 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
 438                 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
 439                 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
 440                 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
 441
 442                 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
 443                 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
 444                 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
 445
 446                 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
 447
 448                 data->last_updated = jiffies;
 449                 data->valid = 1;
 450         }
 451
 452         up(&data->update_lock);
 453
 454         return data;
 455 }
 456
 457
 458
 459 #define FAN_INDEX_FROM_NUM(nr)  ((nr) - 1)
 460
 461 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
 462                               const char *buf, size_t count, int nr, int reg)
 463 {
 464         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 465         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
 466
 467         down(&data->update_lock);
 468         data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
 469         fscher_write_value(client, reg, v);
 470         up(&data->update_lock);
 471         return count;
 472 }
 473
 474 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
 475 {
 476         /* bits 0..1, 3..7 reserved => mask with 0x04 */
 477         return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
 478 }
 479
 480 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
 481                        const char *buf, size_t count, int nr, int reg)
 482 {
 483         unsigned long v = simple_strtoul(buf, NULL, 10);
 484
 485         down(&data->update_lock);
 486         data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
 487         fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 488         up(&data->update_lock);
 489         return count;
 490 }
 491
 492 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
 493 {
 494         return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
 495 }
 496
 497 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
 498                            const char *buf, size_t count, int nr, int reg)
 499 {
 500         /* supported values: 2, 4, 8 */
 501         unsigned long v = simple_strtoul(buf, NULL, 10);
 502
 503         switch (v) {
 504         case 2: v = 1; break;
 505         case 4: v = 2; break;
 506         case 8: v = 3; break;
 507         default:
 508                 dev_err(&client->dev, "fan_div value %ld not "
 509                          "supported. Choose one of 2, 4 or 8!\n", v);
 510                 return -EINVAL;
 511         }
 512
 513         down(&data->update_lock);
 514
 515         /* bits 2..7 reserved => mask with 0x03 */
 516         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
 517         data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
 518
 519         fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
 520         up(&data->update_lock);
 521         return count;
 522 }
 523
 524 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
 525 {
 526         /* bits 2..7 reserved => mask with 0x03 */
 527         return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
 528 }
 529
 530 #define RPM_FROM_REG(val)       (val*60)
 531
 532 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
 533 {
 534         return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
 535 }
 536
 537
 538
 539 #define TEMP_INDEX_FROM_NUM(nr)         ((nr) - 1)
 540
 541 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
 542                                const char *buf, size_t count, int nr, int reg)
 543 {
 544         /* bits 2..7 reserved, 0 read only => mask with 0x02 */
 545         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 546
 547         down(&data->update_lock);
 548         data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
 549         fscher_write_value(client, reg, v);
 550         up(&data->update_lock);
 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
 604         down(&data->update_lock);
 605         data->global_control &= ~v;
 606         fscher_write_value(client, reg, v);
 607         up(&data->update_lock);
 608         return count;
 609 }
 610
 611 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
 612 {
 613         /* bits 1..7 reserved => mask with 0x01 */
 614         return sprintf(buf, "%u\n", data->global_control & 0x01);
 615 }
 616
 617
 618
 619 static ssize_t set_watchdog_control(struct i2c_client *client, struct
 620                                     fscher_data *data, const char *buf, size_t count,
 621                                     int nr, int reg)
 622 {
 623         /* bits 0..3 reserved => mask with 0xf0 */
 624         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
 625
 626         down(&data->update_lock);
 627         data->watchdog[2] &= ~0xf0;
 628         data->watchdog[2] |= v;
 629         fscher_write_value(client, reg, data->watchdog[2]);
 630         up(&data->update_lock);
 631         return count;
 632 }
 633
 634 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
 635 {
 636         /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
 637         return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
 638 }
 639
 640 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
 641                                    const char *buf, size_t count, int nr, int reg)
 642 {
 643         /* bits 0, 2..7 reserved => mask with 0x02 */
 644         unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
 645
 646         down(&data->update_lock);
 647         data->watchdog[1] &= ~v;
 648         fscher_write_value(client, reg, v);
 649         up(&data->update_lock);
 650         return count;
 651 }
 652
 653 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
 654 {
 655         /* bits 0, 2..7 reserved => mask with 0x02 */
 656         return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
 657 }
 658
 659 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
 660                                    const char *buf, size_t count, int nr, int reg)
 661 {
 662         unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
 663
 664         down(&data->update_lock);
 665         data->watchdog[0] = v;
 666         fscher_write_value(client, reg, data->watchdog[0]);
 667         up(&data->update_lock);
 668         return count;
 669 }
 670
 671 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
 672 {
 673         return sprintf(buf, "%u\n", data->watchdog[0]);
 674 }
 675
 676 static int __init sensors_fscher_init(void)
 677 {
 678         return i2c_add_driver(&fscher_driver);
 679 }
 680
 681 static void __exit sensors_fscher_exit(void)
 682 {
 683         i2c_del_driver(&fscher_driver);
 684 }
 685
 686 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
 687 MODULE_DESCRIPTION("FSC Hermes driver");
 688 MODULE_LICENSE("GPL");
 689
 690 module_init(sensors_fscher_init);
 691 module_exit(sensors_fscher_exit);