drivers/hwmon/thmc50.c

   1 /*
   2     thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
   3              monitoring
   4     Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
   5     Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
   6     Philip Edelbrock <phil@netroedge.com>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include <linux/module.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/i2c.h>
  27 #include <linux/hwmon.h>
  28 #include <linux/hwmon-sysfs.h>
  29 #include <linux/err.h>
  30 #include <linux/mutex.h>
  31
  32 MODULE_LICENSE("GPL");
  33
  34 /* Addresses to scan */
  35 <<<<<<< HEAD:drivers/hwmon/thmc50.c
  36 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  37 =======
  38 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  39 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/hwmon/thmc50.c
  40
  41 /* Insmod parameters */
  42 I2C_CLIENT_INSMOD_2(thmc50, adm1022);
  43 I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
  44                         "to enable 3rd temperature (ADM1022 only)");
  45
  46 /* Many THMC50 constants specified below */
  47
  48 /* The THMC50 registers */
  49 #define THMC50_REG_CONF                         0x40
  50 #define THMC50_REG_COMPANY_ID                   0x3E
  51 #define THMC50_REG_DIE_CODE                     0x3F
  52 #define THMC50_REG_ANALOG_OUT                   0x19
  53 /*
  54  * The mirror status register cannot be used as
  55  * reading it does not clear alarms.
  56  */
  57 #define THMC50_REG_INTR                         0x41
  58
  59 <<<<<<< HEAD:drivers/hwmon/thmc50.c
  60 const static u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
  61 const static u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
  62 const static u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
  63 =======
  64 static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
  65 static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
  66 static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
  67 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/hwmon/thmc50.c
  68
  69 #define THMC50_REG_CONF_nFANOFF                 0x20
  70
  71 /* Each client has this additional data */
  72 struct thmc50_data {
  73         struct i2c_client client;
  74         struct device *hwmon_dev;
  75
  76         struct mutex update_lock;
  77         enum chips type;
  78         unsigned long last_updated;     /* In jiffies */
  79         char has_temp3;         /* !=0 if it is ADM1022 in temp3 mode */
  80         char valid;             /* !=0 if following fields are valid */
  81
  82         /* Register values */
  83         s8 temp_input[3];
  84         s8 temp_max[3];
  85         s8 temp_min[3];
  86         u8 analog_out;
  87         u8 alarms;
  88 };
  89
  90 static int thmc50_attach_adapter(struct i2c_adapter *adapter);
  91 static int thmc50_detach_client(struct i2c_client *client);
  92 static void thmc50_init_client(struct i2c_client *client);
  93 static struct thmc50_data *thmc50_update_device(struct device *dev);
  94
  95 static struct i2c_driver thmc50_driver = {
  96         .driver = {
  97                 .name = "thmc50",
  98         },
  99         .attach_adapter = thmc50_attach_adapter,
 100         .detach_client = thmc50_detach_client,
 101 };
 102
 103 static ssize_t show_analog_out(struct device *dev,
 104                                struct device_attribute *attr, char *buf)
 105 {
 106         struct thmc50_data *data = thmc50_update_device(dev);
 107         return sprintf(buf, "%d\n", data->analog_out);
 108 }
 109
 110 static ssize_t set_analog_out(struct device *dev,
 111                               struct device_attribute *attr,
 112                               const char *buf, size_t count)
 113 {
 114         struct i2c_client *client = to_i2c_client(dev);
 115         struct thmc50_data *data = i2c_get_clientdata(client);
 116         int tmp = simple_strtoul(buf, NULL, 10);
 117         int config;
 118
 119         mutex_lock(&data->update_lock);
 120         data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
 121         i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
 122                                   data->analog_out);
 123
 124         config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
 125         if (data->analog_out == 0)
 126                 config &= ~THMC50_REG_CONF_nFANOFF;
 127         else
 128                 config |= THMC50_REG_CONF_nFANOFF;
 129         i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
 130
 131         mutex_unlock(&data->update_lock);
 132         return count;
 133 }
 134
 135 /* There is only one PWM mode = DC */
 136 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
 137                              char *buf)
 138 {
 139         return sprintf(buf, "0\n");
 140 }
 141
 142 /* Temperatures */
 143 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 144                          char *buf)
 145 {
 146         int nr = to_sensor_dev_attr(attr)->index;
 147         struct thmc50_data *data = thmc50_update_device(dev);
 148         return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
 149 }
 150
 151 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 152                              char *buf)
 153 {
 154         int nr = to_sensor_dev_attr(attr)->index;
 155         struct thmc50_data *data = thmc50_update_device(dev);
 156         return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
 157 }
 158
 159 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 160                             const char *buf, size_t count)
 161 {
 162         int nr = to_sensor_dev_attr(attr)->index;
 163         struct i2c_client *client = to_i2c_client(dev);
 164         struct thmc50_data *data = i2c_get_clientdata(client);
 165         int val = simple_strtol(buf, NULL, 10);
 166
 167         mutex_lock(&data->update_lock);
 168         data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
 169         i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
 170                                   data->temp_min[nr]);
 171         mutex_unlock(&data->update_lock);
 172         return count;
 173 }
 174
 175 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 176                              char *buf)
 177 {
 178         int nr = to_sensor_dev_attr(attr)->index;
 179         struct thmc50_data *data = thmc50_update_device(dev);
 180         return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
 181 }
 182
 183 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 184                             const char *buf, size_t count)
 185 {
 186         int nr = to_sensor_dev_attr(attr)->index;
 187         struct i2c_client *client = to_i2c_client(dev);
 188         struct thmc50_data *data = i2c_get_clientdata(client);
 189         int val = simple_strtol(buf, NULL, 10);
 190
 191         mutex_lock(&data->update_lock);
 192         data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
 193         i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
 194                                   data->temp_max[nr]);
 195         mutex_unlock(&data->update_lock);
 196         return count;
 197 }
 198
 199 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 200                           char *buf)
 201 {
 202         int index = to_sensor_dev_attr(attr)->index;
 203         struct thmc50_data *data = thmc50_update_device(dev);
 204
 205         return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
 206 }
 207
 208 #define temp_reg(offset)                                                \
 209 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,     \
 210                         NULL, offset - 1);                              \
 211 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
 212                         show_temp_min, set_temp_min, offset - 1);       \
 213 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
 214                         show_temp_max, set_temp_max, offset - 1);
 215
 216 temp_reg(1);
 217 temp_reg(2);
 218 temp_reg(3);
 219
 220 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
 221 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
 222 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
 223 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
 224 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
 225
 226 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
 227                           set_analog_out, 0);
 228 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
 229
 230 static struct attribute *thmc50_attributes[] = {
 231         &sensor_dev_attr_temp1_max.dev_attr.attr,
 232         &sensor_dev_attr_temp1_min.dev_attr.attr,
 233         &sensor_dev_attr_temp1_input.dev_attr.attr,
 234         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 235         &sensor_dev_attr_temp2_max.dev_attr.attr,
 236         &sensor_dev_attr_temp2_min.dev_attr.attr,
 237         &sensor_dev_attr_temp2_input.dev_attr.attr,
 238         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 239         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 240         &sensor_dev_attr_pwm1.dev_attr.attr,
 241         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 242         NULL
 243 };
 244
 245 static const struct attribute_group thmc50_group = {
 246         .attrs = thmc50_attributes,
 247 };
 248
 249 /* for ADM1022 3rd temperature mode */
 250 static struct attribute *temp3_attributes[] = {
 251         &sensor_dev_attr_temp3_max.dev_attr.attr,
 252         &sensor_dev_attr_temp3_min.dev_attr.attr,
 253         &sensor_dev_attr_temp3_input.dev_attr.attr,
 254         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
 255         &sensor_dev_attr_temp3_fault.dev_attr.attr,
 256         NULL
 257 };
 258
 259 static const struct attribute_group temp3_group = {
 260         .attrs = temp3_attributes,
 261 };
 262
 263 static int thmc50_detect(struct i2c_adapter *adapter, int address, int kind)
 264 {
 265         unsigned company;
 266         unsigned revision;
 267         unsigned config;
 268         struct i2c_client *client;
 269         struct thmc50_data *data;
 270         struct device *dev;
 271         int err = 0;
 272         const char *type_name;
 273
 274         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 275                 pr_debug("thmc50: detect failed, "
 276                          "smbus byte data not supported!\n");
 277                 goto exit;
 278         }
 279
 280         /* OK. For now, we presume we have a valid client. We now create the
 281            client structure, even though we cannot fill it completely yet.
 282            But it allows us to access thmc50 registers. */
 283         if (!(data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL))) {
 284                 pr_debug("thmc50: detect failed, kzalloc failed!\n");
 285                 err = -ENOMEM;
 286                 goto exit;
 287         }
 288
 289         client = &data->client;
 290         i2c_set_clientdata(client, data);
 291         client->addr = address;
 292         client->adapter = adapter;
 293         client->driver = &thmc50_driver;
 294         dev = &client->dev;
 295
 296         pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
 297                  client->addr, i2c_adapter_id(client->adapter));
 298
 299         /* Now, we do the remaining detection. */
 300         company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
 301         revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
 302         config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
 303
 304         if (kind == 0)
 305                 kind = thmc50;
 306         else if (kind < 0) {
 307                 err = -ENODEV;
 308                 if (revision >= 0xc0 && ((config & 0x10) == 0)) {
 309                         if (company == 0x49) {
 310                                 kind = thmc50;
 311                                 err = 0;
 312                         } else if (company == 0x41) {
 313                                 kind = adm1022;
 314                                 err = 0;
 315                         }
 316                 }
 317         }
 318         if (err == -ENODEV) {
 319                 pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
 320                 goto exit_free;
 321         }
 322         data->type = kind;
 323
 324         if (kind == adm1022) {
 325                 int id = i2c_adapter_id(client->adapter);
 326                 int i;
 327
 328                 type_name = "adm1022";
 329                 data->has_temp3 = (config >> 7) & 1;    /* config MSB */
 330                 for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
 331                         if (adm1022_temp3[i] == id &&
 332                             adm1022_temp3[i + 1] == address) {
 333                                 /* enable 2nd remote temp */
 334                                 data->has_temp3 = 1;
 335                                 break;
 336                         }
 337         } else {
 338                 type_name = "thmc50";
 339         }
 340         pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
 341                  type_name, (revision >> 4) - 0xc, revision & 0xf);
 342
 343         /* Fill in the remaining client fields & put it into the global list */
 344         strlcpy(client->name, type_name, I2C_NAME_SIZE);
 345         mutex_init(&data->update_lock);
 346
 347         /* Tell the I2C layer a new client has arrived */
 348         if ((err = i2c_attach_client(client)))
 349                 goto exit_free;
 350
 351         thmc50_init_client(client);
 352
 353         /* Register sysfs hooks */
 354         if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
 355                 goto exit_detach;
 356
 357         /* Register ADM1022 sysfs hooks */
 358         if (data->has_temp3)
 359                 if ((err = sysfs_create_group(&client->dev.kobj,
 360                                               &temp3_group)))
 361                         goto exit_remove_sysfs_thmc50;
 362
 363         /* Register a new directory entry with module sensors */
 364         data->hwmon_dev = hwmon_device_register(&client->dev);
 365         if (IS_ERR(data->hwmon_dev)) {
 366                 err = PTR_ERR(data->hwmon_dev);
 367                 goto exit_remove_sysfs;
 368         }
 369
 370         return 0;
 371
 372 exit_remove_sysfs:
 373         if (data->has_temp3)
 374                 sysfs_remove_group(&client->dev.kobj, &temp3_group);
 375 exit_remove_sysfs_thmc50:
 376         sysfs_remove_group(&client->dev.kobj, &thmc50_group);
 377 exit_detach:
 378         i2c_detach_client(client);
 379 exit_free:
 380         kfree(data);
 381 exit:
 382         return err;
 383 }
 384
 385 static int thmc50_attach_adapter(struct i2c_adapter *adapter)
 386 {
 387         if (!(adapter->class & I2C_CLASS_HWMON))
 388                 return 0;
 389         return i2c_probe(adapter, &addr_data, thmc50_detect);
 390 }
 391
 392 static int thmc50_detach_client(struct i2c_client *client)
 393 {
 394         struct thmc50_data *data = i2c_get_clientdata(client);
 395         int err;
 396
 397         hwmon_device_unregister(data->hwmon_dev);
 398         sysfs_remove_group(&client->dev.kobj, &thmc50_group);
 399         if (data->has_temp3)
 400                 sysfs_remove_group(&client->dev.kobj, &temp3_group);
 401
 402         if ((err = i2c_detach_client(client)))
 403                 return err;
 404
 405         kfree(data);
 406
 407         return 0;
 408 }
 409
 410 static void thmc50_init_client(struct i2c_client *client)
 411 {
 412         struct thmc50_data *data = i2c_get_clientdata(client);
 413         int config;
 414
 415         data->analog_out = i2c_smbus_read_byte_data(client,
 416                                                     THMC50_REG_ANALOG_OUT);
 417         /* set up to at least 1 */
 418         if (data->analog_out == 0) {
 419                 data->analog_out = 1;
 420                 i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
 421                                           data->analog_out);
 422         }
 423         config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
 424         config |= 0x1;  /* start the chip if it is in standby mode */
 425         if (data->has_temp3)
 426                 config |= 0x80;         /* enable 2nd remote temp */
 427         i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
 428 }
 429
 430 static struct thmc50_data *thmc50_update_device(struct device *dev)
 431 {
 432         struct i2c_client *client = to_i2c_client(dev);
 433         struct thmc50_data *data = i2c_get_clientdata(client);
 434         int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
 435
 436         mutex_lock(&data->update_lock);
 437
 438         if (time_after(jiffies, data->last_updated + timeout)
 439             || !data->valid) {
 440
 441                 int temps = data->has_temp3 ? 3 : 2;
 442                 int i;
 443                 for (i = 0; i < temps; i++) {
 444                         data->temp_input[i] = i2c_smbus_read_byte_data(client,
 445                                                 THMC50_REG_TEMP[i]);
 446                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 447                                                 THMC50_REG_TEMP_MAX[i]);
 448                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 449                                                 THMC50_REG_TEMP_MIN[i]);
 450                 }
 451                 data->analog_out =
 452                     i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
 453                 data->alarms =
 454                     i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
 455                 data->last_updated = jiffies;
 456                 data->valid = 1;
 457         }
 458
 459         mutex_unlock(&data->update_lock);
 460
 461         return data;
 462 }
 463
 464 static int __init sm_thmc50_init(void)
 465 {
 466         return i2c_add_driver(&thmc50_driver);
 467 }
 468
 469 static void __exit sm_thmc50_exit(void)
 470 {
 471         i2c_del_driver(&thmc50_driver);
 472 }
 473
 474 MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
 475 MODULE_DESCRIPTION("THMC50 driver");
 476
 477 module_init(sm_thmc50_init);
 478 module_exit(sm_thmc50_exit);