drivers/hwmon/vt8231.c

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This source file includes following definitions.
FAN_TO_REG
vt8231_read_value
vt8231_write_value
in_show
in_min_show
in_max_show
in_min_store
in_max_store
in5_input_show
in5_min_show
in5_max_show
in5_min_store
in5_max_store
temp1_input_show
temp1_max_show
temp1_max_hyst_show
temp1_max_store
temp1_max_hyst_store
temp_show
temp_max_show
temp_min_show
temp_max_store
temp_min_store
fan_show
fan_min_show
fan_div_show
fan_min_store
fan_div_store
alarms_show
alarm_show
name_show
vt8231_probe
vt8231_remove
vt8231_init_device
vt8231_update_device
vt8231_device_add
vt8231_pci_probe
sm_vt8231_init
sm_vt8231_exit
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * vt8231.c - Part of lm_sensors, Linux kernel modules
   4  *            for hardware monitoring
   5  *
   6  * Copyright (c) 2005 Roger Lucas <vt8231@hiddenengine.co.uk>
   7  * Copyright (c) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
   8  *                    Aaron M. Marsh <amarsh@sdf.lonestar.org>
   9  */
  10 
  11 /*
  12  * Supports VIA VT8231 South Bridge embedded sensors
  13  */
  14 
  15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16 
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/pci.h>
  21 #include <linux/jiffies.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/hwmon.h>
  24 #include <linux/hwmon-sysfs.h>
  25 #include <linux/hwmon-vid.h>
  26 #include <linux/err.h>
  27 #include <linux/mutex.h>
  28 #include <linux/acpi.h>
  29 #include <linux/io.h>
  30 
  31 static int force_addr;
  32 module_param(force_addr, int, 0);
  33 MODULE_PARM_DESC(force_addr, "Initialize the base address of the sensors");
  34 
  35 static struct platform_device *pdev;
  36 
  37 #define VT8231_EXTENT 0x80
  38 #define VT8231_BASE_REG 0x70
  39 #define VT8231_ENABLE_REG 0x74
  40 
  41 /*
  42  * The VT8231 registers
  43  *
  44  * The reset value for the input channel configuration is used (Reg 0x4A=0x07)
  45  * which sets the selected inputs marked with '*' below if multiple options are
  46  * possible:
  47  *
  48  *                  Voltage Mode          Temperature Mode
  49  *      Sensor        Linux Id        Linux Id        VIA Id
  50  *      --------      --------        --------        ------
  51  *      CPU Diode       N/A             temp1           0
  52  *      UIC1            in0             temp2 *         1
  53  *      UIC2            in1 *           temp3           2
  54  *      UIC3            in2 *           temp4           3
  55  *      UIC4            in3 *           temp5           4
  56  *      UIC5            in4 *           temp6           5
  57  *      3.3V            in5             N/A
  58  *
  59  * Note that the BIOS may set the configuration register to a different value
  60  * to match the motherboard configuration.
  61  */
  62 
  63 /* fans numbered 0-1 */
  64 #define VT8231_REG_FAN_MIN(nr)  (0x3b + (nr))
  65 #define VT8231_REG_FAN(nr)      (0x29 + (nr))
  66 
  67 /* Voltage inputs numbered 0-5 */
  68 
  69 static const u8 regvolt[]    = { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26 };
  70 static const u8 regvoltmax[] = { 0x3d, 0x2b, 0x2d, 0x2f, 0x31, 0x33 };
  71 static const u8 regvoltmin[] = { 0x3e, 0x2c, 0x2e, 0x30, 0x32, 0x34 };
  72 
  73 /*
  74  * Temperatures are numbered 1-6 according to the Linux kernel specification.
  75  *
  76  * In the VIA datasheet, however, the temperatures are numbered from zero.
  77  * Since it is important that this driver can easily be compared to the VIA
  78  * datasheet, we will use the VIA numbering within this driver and map the
  79  * kernel sysfs device name to the VIA number in the sysfs callback.
  80  */
  81 
  82 #define VT8231_REG_TEMP_LOW01   0x49
  83 #define VT8231_REG_TEMP_LOW25   0x4d
  84 
  85 static const u8 regtemp[]    = { 0x1f, 0x21, 0x22, 0x23, 0x24, 0x25 };
  86 static const u8 regtempmax[] = { 0x39, 0x3d, 0x2b, 0x2d, 0x2f, 0x31 };
  87 static const u8 regtempmin[] = { 0x3a, 0x3e, 0x2c, 0x2e, 0x30, 0x32 };
  88 
  89 #define TEMP_FROM_REG(reg)              (((253 * 4 - (reg)) * 550 + 105) / 210)
  90 #define TEMP_MAXMIN_FROM_REG(reg)       (((253 - (reg)) * 2200 + 105) / 210)
  91 #define TEMP_MAXMIN_TO_REG(val)         (253 - ((val) * 210 + 1100) / 2200)
  92 
  93 #define VT8231_REG_CONFIG 0x40
  94 #define VT8231_REG_ALARM1 0x41
  95 #define VT8231_REG_ALARM2 0x42
  96 #define VT8231_REG_FANDIV 0x47
  97 #define VT8231_REG_UCH_CONFIG 0x4a
  98 #define VT8231_REG_TEMP1_CONFIG 0x4b
  99 #define VT8231_REG_TEMP2_CONFIG 0x4c
 100 
 101 /*
 102  * temps 0-5 as numbered in VIA datasheet - see later for mapping to Linux
 103  * numbering
 104  */
 105 #define ISTEMP(i, ch_config) ((i) == 0 ? 1 : \
 106                               ((ch_config) >> ((i)+1)) & 0x01)
 107 /* voltages 0-5 */
 108 #define ISVOLT(i, ch_config) ((i) == 5 ? 1 : \
 109                               !(((ch_config) >> ((i)+2)) & 0x01))
 110 
 111 #define DIV_FROM_REG(val) (1 << (val))
 112 
 113 /*
 114  * NB  The values returned here are NOT temperatures.  The calibration curves
 115  *     for the thermistor curves are board-specific and must go in the
 116  *     sensors.conf file.  Temperature sensors are actually ten bits, but the
 117  *     VIA datasheet only considers the 8 MSBs obtained from the regtemp[]
 118  *     register.  The temperature value returned should have a magnitude of 3,
 119  *     so we use the VIA scaling as the "true" scaling and use the remaining 2
 120  *     LSBs as fractional precision.
 121  *
 122  *     All the on-chip hardware temperature comparisons for the alarms are only
 123  *     8-bits wide, and compare against the 8 MSBs of the temperature.  The bits
 124  *     in the registers VT8231_REG_TEMP_LOW01 and VT8231_REG_TEMP_LOW25 are
 125  *     ignored.
 126  */
 127 
 128 /*
 129  ****** FAN RPM CONVERSIONS ********
 130  * This chip saturates back at 0, not at 255 like many the other chips.
 131  * So, 0 means 0 RPM
 132  */
 133 static inline u8 FAN_TO_REG(long rpm, int div)
 134 {
 135         if (rpm <= 0 || rpm > 1310720)
 136                 return 0;
 137         return clamp_val(1310720 / (rpm * div), 1, 255);
 138 }
 139 
 140 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : 1310720 / ((val) * (div)))
 141 
 142 struct vt8231_data {
 143         unsigned short addr;
 144         const char *name;
 145 
 146         struct mutex update_lock;
 147         struct device *hwmon_dev;
 148         char valid;             /* !=0 if following fields are valid */
 149         unsigned long last_updated;     /* In jiffies */
 150 
 151         u8 in[6];               /* Register value */
 152         u8 in_max[6];           /* Register value */
 153         u8 in_min[6];           /* Register value */
 154         u16 temp[6];            /* Register value 10 bit, right aligned */
 155         u8 temp_max[6];         /* Register value */
 156         u8 temp_min[6];         /* Register value */
 157         u8 fan[2];              /* Register value */
 158         u8 fan_min[2];          /* Register value */
 159         u8 fan_div[2];          /* Register encoding, shifted right */
 160         u16 alarms;             /* Register encoding */
 161         u8 uch_config;
 162 };
 163 
 164 static struct pci_dev *s_bridge;
 165 static int vt8231_probe(struct platform_device *pdev);
 166 static int vt8231_remove(struct platform_device *pdev);
 167 static struct vt8231_data *vt8231_update_device(struct device *dev);
 168 static void vt8231_init_device(struct vt8231_data *data);
 169 
 170 static inline int vt8231_read_value(struct vt8231_data *data, u8 reg)
 171 {
 172         return inb_p(data->addr + reg);
 173 }
 174 
 175 static inline void vt8231_write_value(struct vt8231_data *data, u8 reg,
 176                                         u8 value)
 177 {
 178         outb_p(value, data->addr + reg);
 179 }
 180 
 181 /* following are the sysfs callback functions */
 182 static ssize_t in_show(struct device *dev, struct device_attribute *attr,
 183                        char *buf)
 184 {
 185         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 186         int nr = sensor_attr->index;
 187         struct vt8231_data *data = vt8231_update_device(dev);
 188 
 189         return sprintf(buf, "%d\n", ((data->in[nr] - 3) * 10000) / 958);
 190 }
 191 
 192 static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
 193                            char *buf)
 194 {
 195         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 196         int nr = sensor_attr->index;
 197         struct vt8231_data *data = vt8231_update_device(dev);
 198 
 199         return sprintf(buf, "%d\n", ((data->in_min[nr] - 3) * 10000) / 958);
 200 }
 201 
 202 static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
 203                            char *buf)
 204 {
 205         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 206         int nr = sensor_attr->index;
 207         struct vt8231_data *data = vt8231_update_device(dev);
 208 
 209         return sprintf(buf, "%d\n", (((data->in_max[nr] - 3) * 10000) / 958));
 210 }
 211 
 212 static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
 213                             const char *buf, size_t count)
 214 {
 215         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 216         int nr = sensor_attr->index;
 217         struct vt8231_data *data = dev_get_drvdata(dev);
 218         unsigned long val;
 219         int err;
 220 
 221         err = kstrtoul(buf, 10, &val);
 222         if (err)
 223                 return err;
 224 
 225         mutex_lock(&data->update_lock);
 226         data->in_min[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
 227         vt8231_write_value(data, regvoltmin[nr], data->in_min[nr]);
 228         mutex_unlock(&data->update_lock);
 229         return count;
 230 }
 231 
 232 static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
 233                             const char *buf, size_t count)
 234 {
 235         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 236         int nr = sensor_attr->index;
 237         struct vt8231_data *data = dev_get_drvdata(dev);
 238         unsigned long val;
 239         int err;
 240 
 241         err = kstrtoul(buf, 10, &val);
 242         if (err)
 243                 return err;
 244 
 245         mutex_lock(&data->update_lock);
 246         data->in_max[nr] = clamp_val(((val * 958) / 10000) + 3, 0, 255);
 247         vt8231_write_value(data, regvoltmax[nr], data->in_max[nr]);
 248         mutex_unlock(&data->update_lock);
 249         return count;
 250 }
 251 
 252 /* Special case for input 5 as this has 3.3V scaling built into the chip */
 253 static ssize_t in5_input_show(struct device *dev,
 254                               struct device_attribute *attr, char *buf)
 255 {
 256         struct vt8231_data *data = vt8231_update_device(dev);
 257 
 258         return sprintf(buf, "%d\n",
 259                 (((data->in[5] - 3) * 10000 * 54) / (958 * 34)));
 260 }
 261 
 262 static ssize_t in5_min_show(struct device *dev, struct device_attribute *attr,
 263                 char *buf)
 264 {
 265         struct vt8231_data *data = vt8231_update_device(dev);
 266 
 267         return sprintf(buf, "%d\n",
 268                 (((data->in_min[5] - 3) * 10000 * 54) / (958 * 34)));
 269 }
 270 
 271 static ssize_t in5_max_show(struct device *dev, struct device_attribute *attr,
 272                 char *buf)
 273 {
 274         struct vt8231_data *data = vt8231_update_device(dev);
 275 
 276         return sprintf(buf, "%d\n",
 277                 (((data->in_max[5] - 3) * 10000 * 54) / (958 * 34)));
 278 }
 279 
 280 static ssize_t in5_min_store(struct device *dev,
 281                              struct device_attribute *attr, const char *buf,
 282                              size_t count)
 283 {
 284         struct vt8231_data *data = dev_get_drvdata(dev);
 285         unsigned long val;
 286         int err;
 287 
 288         err = kstrtoul(buf, 10, &val);
 289         if (err)
 290                 return err;
 291 
 292         mutex_lock(&data->update_lock);
 293         data->in_min[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
 294                                     0, 255);
 295         vt8231_write_value(data, regvoltmin[5], data->in_min[5]);
 296         mutex_unlock(&data->update_lock);
 297         return count;
 298 }
 299 
 300 static ssize_t in5_max_store(struct device *dev,
 301                              struct device_attribute *attr, const char *buf,
 302                              size_t count)
 303 {
 304         struct vt8231_data *data = dev_get_drvdata(dev);
 305         unsigned long val;
 306         int err;
 307 
 308         err = kstrtoul(buf, 10, &val);
 309         if (err)
 310                 return err;
 311 
 312         mutex_lock(&data->update_lock);
 313         data->in_max[5] = clamp_val(((val * 958 * 34) / (10000 * 54)) + 3,
 314                                     0, 255);
 315         vt8231_write_value(data, regvoltmax[5], data->in_max[5]);
 316         mutex_unlock(&data->update_lock);
 317         return count;
 318 }
 319 
 320 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
 321 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
 322 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
 323 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
 324 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
 325 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
 326 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
 327 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
 328 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
 329 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
 330 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
 331 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
 332 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
 333 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
 334 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
 335 
 336 static DEVICE_ATTR_RO(in5_input);
 337 static DEVICE_ATTR_RW(in5_min);
 338 static DEVICE_ATTR_RW(in5_max);
 339 
 340 /* Temperatures */
 341 static ssize_t temp1_input_show(struct device *dev,
 342                                 struct device_attribute *attr, char *buf)
 343 {
 344         struct vt8231_data *data = vt8231_update_device(dev);
 345         return sprintf(buf, "%d\n", data->temp[0] * 250);
 346 }
 347 
 348 static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
 349                 char *buf)
 350 {
 351         struct vt8231_data *data = vt8231_update_device(dev);
 352         return sprintf(buf, "%d\n", data->temp_max[0] * 1000);
 353 }
 354 
 355 static ssize_t temp1_max_hyst_show(struct device *dev,
 356                                    struct device_attribute *attr, char *buf)
 357 {
 358         struct vt8231_data *data = vt8231_update_device(dev);
 359         return sprintf(buf, "%d\n", data->temp_min[0] * 1000);
 360 }
 361 
 362 static ssize_t temp1_max_store(struct device *dev,
 363                                struct device_attribute *attr, const char *buf,
 364                                size_t count)
 365 {
 366         struct vt8231_data *data = dev_get_drvdata(dev);
 367         long val;
 368         int err;
 369 
 370         err = kstrtol(buf, 10, &val);
 371         if (err)
 372                 return err;
 373 
 374         mutex_lock(&data->update_lock);
 375         data->temp_max[0] = clamp_val((val + 500) / 1000, 0, 255);
 376         vt8231_write_value(data, regtempmax[0], data->temp_max[0]);
 377         mutex_unlock(&data->update_lock);
 378         return count;
 379 }
 380 static ssize_t temp1_max_hyst_store(struct device *dev,
 381                                     struct device_attribute *attr,
 382                                     const char *buf, size_t count)
 383 {
 384         struct vt8231_data *data = dev_get_drvdata(dev);
 385         long val;
 386         int err;
 387 
 388         err = kstrtol(buf, 10, &val);
 389         if (err)
 390                 return err;
 391 
 392         mutex_lock(&data->update_lock);
 393         data->temp_min[0] = clamp_val((val + 500) / 1000, 0, 255);
 394         vt8231_write_value(data, regtempmin[0], data->temp_min[0]);
 395         mutex_unlock(&data->update_lock);
 396         return count;
 397 }
 398 
 399 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
 400                          char *buf)
 401 {
 402         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 403         int nr = sensor_attr->index;
 404         struct vt8231_data *data = vt8231_update_device(dev);
 405         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
 406 }
 407 
 408 static ssize_t temp_max_show(struct device *dev,
 409                              struct device_attribute *attr, char *buf)
 410 {
 411         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 412         int nr = sensor_attr->index;
 413         struct vt8231_data *data = vt8231_update_device(dev);
 414         return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_max[nr]));
 415 }
 416 
 417 static ssize_t temp_min_show(struct device *dev,
 418                              struct device_attribute *attr, char *buf)
 419 {
 420         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 421         int nr = sensor_attr->index;
 422         struct vt8231_data *data = vt8231_update_device(dev);
 423         return sprintf(buf, "%d\n", TEMP_MAXMIN_FROM_REG(data->temp_min[nr]));
 424 }
 425 
 426 static ssize_t temp_max_store(struct device *dev,
 427                               struct device_attribute *attr, const char *buf,
 428                               size_t count)
 429 {
 430         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 431         int nr = sensor_attr->index;
 432         struct vt8231_data *data = dev_get_drvdata(dev);
 433         long val;
 434         int err;
 435 
 436         err = kstrtol(buf, 10, &val);
 437         if (err)
 438                 return err;
 439 
 440         mutex_lock(&data->update_lock);
 441         data->temp_max[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
 442         vt8231_write_value(data, regtempmax[nr], data->temp_max[nr]);
 443         mutex_unlock(&data->update_lock);
 444         return count;
 445 }
 446 static ssize_t temp_min_store(struct device *dev,
 447                               struct device_attribute *attr, const char *buf,
 448                               size_t count)
 449 {
 450         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 451         int nr = sensor_attr->index;
 452         struct vt8231_data *data = dev_get_drvdata(dev);
 453         long val;
 454         int err;
 455 
 456         err = kstrtol(buf, 10, &val);
 457         if (err)
 458                 return err;
 459 
 460         mutex_lock(&data->update_lock);
 461         data->temp_min[nr] = clamp_val(TEMP_MAXMIN_TO_REG(val), 0, 255);
 462         vt8231_write_value(data, regtempmin[nr], data->temp_min[nr]);
 463         mutex_unlock(&data->update_lock);
 464         return count;
 465 }
 466 
 467 /*
 468  * Note that these map the Linux temperature sensor numbering (1-6) to the VIA
 469  * temperature sensor numbering (0-5)
 470  */
 471 
 472 static DEVICE_ATTR_RO(temp1_input);
 473 static DEVICE_ATTR_RW(temp1_max);
 474 static DEVICE_ATTR_RW(temp1_max_hyst);
 475 
 476 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
 477 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
 478 static SENSOR_DEVICE_ATTR_RW(temp2_max_hyst, temp_min, 1);
 479 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
 480 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
 481 static SENSOR_DEVICE_ATTR_RW(temp3_max_hyst, temp_min, 2);
 482 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
 483 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
 484 static SENSOR_DEVICE_ATTR_RW(temp4_max_hyst, temp_min, 3);
 485 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
 486 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
 487 static SENSOR_DEVICE_ATTR_RW(temp5_max_hyst, temp_min, 4);
 488 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
 489 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
 490 static SENSOR_DEVICE_ATTR_RW(temp6_max_hyst, temp_min, 5);
 491 
 492 /* Fans */
 493 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
 494                         char *buf)
 495 {
 496         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 497         int nr = sensor_attr->index;
 498         struct vt8231_data *data = vt8231_update_device(dev);
 499         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 500                                 DIV_FROM_REG(data->fan_div[nr])));
 501 }
 502 
 503 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
 504                             char *buf)
 505 {
 506         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 507         int nr = sensor_attr->index;
 508         struct vt8231_data *data = vt8231_update_device(dev);
 509         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 510                         DIV_FROM_REG(data->fan_div[nr])));
 511 }
 512 
 513 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
 514                             char *buf)
 515 {
 516         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 517         int nr = sensor_attr->index;
 518         struct vt8231_data *data = vt8231_update_device(dev);
 519         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 520 }
 521 
 522 static ssize_t fan_min_store(struct device *dev,
 523                              struct device_attribute *attr, const char *buf,
 524                              size_t count)
 525 {
 526         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 527         int nr = sensor_attr->index;
 528         struct vt8231_data *data = dev_get_drvdata(dev);
 529         unsigned long val;
 530         int err;
 531 
 532         err = kstrtoul(buf, 10, &val);
 533         if (err)
 534                 return err;
 535 
 536         mutex_lock(&data->update_lock);
 537         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 538         vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
 539         mutex_unlock(&data->update_lock);
 540         return count;
 541 }
 542 
 543 static ssize_t fan_div_store(struct device *dev,
 544                              struct device_attribute *attr, const char *buf,
 545                              size_t count)
 546 {
 547         struct vt8231_data *data = dev_get_drvdata(dev);
 548         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 549         unsigned long val;
 550         int nr = sensor_attr->index;
 551         int old = vt8231_read_value(data, VT8231_REG_FANDIV);
 552         long min = FAN_FROM_REG(data->fan_min[nr],
 553                                  DIV_FROM_REG(data->fan_div[nr]));
 554         int err;
 555 
 556         err = kstrtoul(buf, 10, &val);
 557         if (err)
 558                 return err;
 559 
 560         mutex_lock(&data->update_lock);
 561         switch (val) {
 562         case 1:
 563                 data->fan_div[nr] = 0;
 564                 break;
 565         case 2:
 566                 data->fan_div[nr] = 1;
 567                 break;
 568         case 4:
 569                 data->fan_div[nr] = 2;
 570                 break;
 571         case 8:
 572                 data->fan_div[nr] = 3;
 573                 break;
 574         default:
 575                 dev_err(dev,
 576                         "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
 577                         val);
 578                 mutex_unlock(&data->update_lock);
 579                 return -EINVAL;
 580         }
 581 
 582         /* Correct the fan minimum speed */
 583         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 584         vt8231_write_value(data, VT8231_REG_FAN_MIN(nr), data->fan_min[nr]);
 585 
 586         old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
 587         vt8231_write_value(data, VT8231_REG_FANDIV, old);
 588         mutex_unlock(&data->update_lock);
 589         return count;
 590 }
 591 
 592 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
 593 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
 594 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
 595 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
 596 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
 597 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
 598 
 599 /* Alarms */
 600 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
 601                            char *buf)
 602 {
 603         struct vt8231_data *data = vt8231_update_device(dev);
 604         return sprintf(buf, "%d\n", data->alarms);
 605 }
 606 static DEVICE_ATTR_RO(alarms);
 607 
 608 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
 609                           char *buf)
 610 {
 611         int bitnr = to_sensor_dev_attr(attr)->index;
 612         struct vt8231_data *data = vt8231_update_device(dev);
 613         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 614 }
 615 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
 616 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 11);
 617 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0);
 618 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, 1);
 619 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, 3);
 620 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, 8);
 621 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 11);
 622 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0);
 623 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 1);
 624 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
 625 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
 626 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 2);
 627 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
 628 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
 629 
 630 static ssize_t name_show(struct device *dev, struct device_attribute
 631                          *devattr, char *buf)
 632 {
 633         struct vt8231_data *data = dev_get_drvdata(dev);
 634         return sprintf(buf, "%s\n", data->name);
 635 }
 636 static DEVICE_ATTR_RO(name);
 637 
 638 static struct attribute *vt8231_attributes_temps[6][5] = {
 639         {
 640                 &dev_attr_temp1_input.attr,
 641                 &dev_attr_temp1_max_hyst.attr,
 642                 &dev_attr_temp1_max.attr,
 643                 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 644                 NULL
 645         }, {
 646                 &sensor_dev_attr_temp2_input.dev_attr.attr,
 647                 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 648                 &sensor_dev_attr_temp2_max.dev_attr.attr,
 649                 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 650                 NULL
 651         }, {
 652                 &sensor_dev_attr_temp3_input.dev_attr.attr,
 653                 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
 654                 &sensor_dev_attr_temp3_max.dev_attr.attr,
 655                 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
 656                 NULL
 657         }, {
 658                 &sensor_dev_attr_temp4_input.dev_attr.attr,
 659                 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
 660                 &sensor_dev_attr_temp4_max.dev_attr.attr,
 661                 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
 662                 NULL
 663         }, {
 664                 &sensor_dev_attr_temp5_input.dev_attr.attr,
 665                 &sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
 666                 &sensor_dev_attr_temp5_max.dev_attr.attr,
 667                 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
 668                 NULL
 669         }, {
 670                 &sensor_dev_attr_temp6_input.dev_attr.attr,
 671                 &sensor_dev_attr_temp6_max_hyst.dev_attr.attr,
 672                 &sensor_dev_attr_temp6_max.dev_attr.attr,
 673                 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
 674                 NULL
 675         }
 676 };
 677 
 678 static const struct attribute_group vt8231_group_temps[6] = {
 679         { .attrs = vt8231_attributes_temps[0] },
 680         { .attrs = vt8231_attributes_temps[1] },
 681         { .attrs = vt8231_attributes_temps[2] },
 682         { .attrs = vt8231_attributes_temps[3] },
 683         { .attrs = vt8231_attributes_temps[4] },
 684         { .attrs = vt8231_attributes_temps[5] },
 685 };
 686 
 687 static struct attribute *vt8231_attributes_volts[6][5] = {
 688         {
 689                 &sensor_dev_attr_in0_input.dev_attr.attr,
 690                 &sensor_dev_attr_in0_min.dev_attr.attr,
 691                 &sensor_dev_attr_in0_max.dev_attr.attr,
 692                 &sensor_dev_attr_in0_alarm.dev_attr.attr,
 693                 NULL
 694         }, {
 695                 &sensor_dev_attr_in1_input.dev_attr.attr,
 696                 &sensor_dev_attr_in1_min.dev_attr.attr,
 697                 &sensor_dev_attr_in1_max.dev_attr.attr,
 698                 &sensor_dev_attr_in1_alarm.dev_attr.attr,
 699                 NULL
 700         }, {
 701                 &sensor_dev_attr_in2_input.dev_attr.attr,
 702                 &sensor_dev_attr_in2_min.dev_attr.attr,
 703                 &sensor_dev_attr_in2_max.dev_attr.attr,
 704                 &sensor_dev_attr_in2_alarm.dev_attr.attr,
 705                 NULL
 706         }, {
 707                 &sensor_dev_attr_in3_input.dev_attr.attr,
 708                 &sensor_dev_attr_in3_min.dev_attr.attr,
 709                 &sensor_dev_attr_in3_max.dev_attr.attr,
 710                 &sensor_dev_attr_in3_alarm.dev_attr.attr,
 711                 NULL
 712         }, {
 713                 &sensor_dev_attr_in4_input.dev_attr.attr,
 714                 &sensor_dev_attr_in4_min.dev_attr.attr,
 715                 &sensor_dev_attr_in4_max.dev_attr.attr,
 716                 &sensor_dev_attr_in4_alarm.dev_attr.attr,
 717                 NULL
 718         }, {
 719                 &dev_attr_in5_input.attr,
 720                 &dev_attr_in5_min.attr,
 721                 &dev_attr_in5_max.attr,
 722                 &sensor_dev_attr_in5_alarm.dev_attr.attr,
 723                 NULL
 724         }
 725 };
 726 
 727 static const struct attribute_group vt8231_group_volts[6] = {
 728         { .attrs = vt8231_attributes_volts[0] },
 729         { .attrs = vt8231_attributes_volts[1] },
 730         { .attrs = vt8231_attributes_volts[2] },
 731         { .attrs = vt8231_attributes_volts[3] },
 732         { .attrs = vt8231_attributes_volts[4] },
 733         { .attrs = vt8231_attributes_volts[5] },
 734 };
 735 
 736 static struct attribute *vt8231_attributes[] = {
 737         &sensor_dev_attr_fan1_input.dev_attr.attr,
 738         &sensor_dev_attr_fan2_input.dev_attr.attr,
 739         &sensor_dev_attr_fan1_min.dev_attr.attr,
 740         &sensor_dev_attr_fan2_min.dev_attr.attr,
 741         &sensor_dev_attr_fan1_div.dev_attr.attr,
 742         &sensor_dev_attr_fan2_div.dev_attr.attr,
 743         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 744         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 745         &dev_attr_alarms.attr,
 746         &dev_attr_name.attr,
 747         NULL
 748 };
 749 
 750 static const struct attribute_group vt8231_group = {
 751         .attrs = vt8231_attributes,
 752 };
 753 
 754 static struct platform_driver vt8231_driver = {
 755         .driver = {
 756                 .name   = "vt8231",
 757         },
 758         .probe  = vt8231_probe,
 759         .remove = vt8231_remove,
 760 };
 761 
 762 static const struct pci_device_id vt8231_pci_ids[] = {
 763         { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4) },
 764         { 0, }
 765 };
 766 
 767 MODULE_DEVICE_TABLE(pci, vt8231_pci_ids);
 768 
 769 static int vt8231_pci_probe(struct pci_dev *dev,
 770                                       const struct pci_device_id *id);
 771 
 772 static struct pci_driver vt8231_pci_driver = {
 773         .name           = "vt8231",
 774         .id_table       = vt8231_pci_ids,
 775         .probe          = vt8231_pci_probe,
 776 };
 777 
 778 static int vt8231_probe(struct platform_device *pdev)
 779 {
 780         struct resource *res;
 781         struct vt8231_data *data;
 782         int err = 0, i;
 783 
 784         /* Reserve the ISA region */
 785         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 786         if (!devm_request_region(&pdev->dev, res->start, VT8231_EXTENT,
 787                                  vt8231_driver.driver.name)) {
 788                 dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
 789                         (unsigned long)res->start, (unsigned long)res->end);
 790                 return -ENODEV;
 791         }
 792 
 793         data = devm_kzalloc(&pdev->dev, sizeof(struct vt8231_data), GFP_KERNEL);
 794         if (!data)
 795                 return -ENOMEM;
 796 
 797         platform_set_drvdata(pdev, data);
 798         data->addr = res->start;
 799         data->name = "vt8231";
 800 
 801         mutex_init(&data->update_lock);
 802         vt8231_init_device(data);
 803 
 804         /* Register sysfs hooks */
 805         err = sysfs_create_group(&pdev->dev.kobj, &vt8231_group);
 806         if (err)
 807                 return err;
 808 
 809         /* Must update device information to find out the config field */
 810         data->uch_config = vt8231_read_value(data, VT8231_REG_UCH_CONFIG);
 811 
 812         for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++) {
 813                 if (ISTEMP(i, data->uch_config)) {
 814                         err = sysfs_create_group(&pdev->dev.kobj,
 815                                                  &vt8231_group_temps[i]);
 816                         if (err)
 817                                 goto exit_remove_files;
 818                 }
 819         }
 820 
 821         for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++) {
 822                 if (ISVOLT(i, data->uch_config)) {
 823                         err = sysfs_create_group(&pdev->dev.kobj,
 824                                                  &vt8231_group_volts[i]);
 825                         if (err)
 826                                 goto exit_remove_files;
 827                 }
 828         }
 829 
 830         data->hwmon_dev = hwmon_device_register(&pdev->dev);
 831         if (IS_ERR(data->hwmon_dev)) {
 832                 err = PTR_ERR(data->hwmon_dev);
 833                 goto exit_remove_files;
 834         }
 835         return 0;
 836 
 837 exit_remove_files:
 838         for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
 839                 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
 840 
 841         for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
 842                 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
 843 
 844         sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
 845         return err;
 846 }
 847 
 848 static int vt8231_remove(struct platform_device *pdev)
 849 {
 850         struct vt8231_data *data = platform_get_drvdata(pdev);
 851         int i;
 852 
 853         hwmon_device_unregister(data->hwmon_dev);
 854 
 855         for (i = 0; i < ARRAY_SIZE(vt8231_group_volts); i++)
 856                 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_volts[i]);
 857 
 858         for (i = 0; i < ARRAY_SIZE(vt8231_group_temps); i++)
 859                 sysfs_remove_group(&pdev->dev.kobj, &vt8231_group_temps[i]);
 860 
 861         sysfs_remove_group(&pdev->dev.kobj, &vt8231_group);
 862 
 863         return 0;
 864 }
 865 
 866 static void vt8231_init_device(struct vt8231_data *data)
 867 {
 868         vt8231_write_value(data, VT8231_REG_TEMP1_CONFIG, 0);
 869         vt8231_write_value(data, VT8231_REG_TEMP2_CONFIG, 0);
 870 }
 871 
 872 static struct vt8231_data *vt8231_update_device(struct device *dev)
 873 {
 874         struct vt8231_data *data = dev_get_drvdata(dev);
 875         int i;
 876         u16 low;
 877 
 878         mutex_lock(&data->update_lock);
 879 
 880         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 881             || !data->valid) {
 882                 for (i = 0; i < 6; i++) {
 883                         if (ISVOLT(i, data->uch_config)) {
 884                                 data->in[i] = vt8231_read_value(data,
 885                                                 regvolt[i]);
 886                                 data->in_min[i] = vt8231_read_value(data,
 887                                                 regvoltmin[i]);
 888                                 data->in_max[i] = vt8231_read_value(data,
 889                                                 regvoltmax[i]);
 890                         }
 891                 }
 892                 for (i = 0; i < 2; i++) {
 893                         data->fan[i] = vt8231_read_value(data,
 894                                                 VT8231_REG_FAN(i));
 895                         data->fan_min[i] = vt8231_read_value(data,
 896                                                 VT8231_REG_FAN_MIN(i));
 897                 }
 898 
 899                 low = vt8231_read_value(data, VT8231_REG_TEMP_LOW01);
 900                 low = (low >> 6) | ((low & 0x30) >> 2)
 901                     | (vt8231_read_value(data, VT8231_REG_TEMP_LOW25) << 4);
 902                 for (i = 0; i < 6; i++) {
 903                         if (ISTEMP(i, data->uch_config)) {
 904                                 data->temp[i] = (vt8231_read_value(data,
 905                                                        regtemp[i]) << 2)
 906                                                 | ((low >> (2 * i)) & 0x03);
 907                                 data->temp_max[i] = vt8231_read_value(data,
 908                                                       regtempmax[i]);
 909                                 data->temp_min[i] = vt8231_read_value(data,
 910                                                       regtempmin[i]);
 911                         }
 912                 }
 913 
 914                 i = vt8231_read_value(data, VT8231_REG_FANDIV);
 915                 data->fan_div[0] = (i >> 4) & 0x03;
 916                 data->fan_div[1] = i >> 6;
 917                 data->alarms = vt8231_read_value(data, VT8231_REG_ALARM1) |
 918                         (vt8231_read_value(data, VT8231_REG_ALARM2) << 8);
 919 
 920                 /* Set alarm flags correctly */
 921                 if (!data->fan[0] && data->fan_min[0])
 922                         data->alarms |= 0x40;
 923                 else if (data->fan[0] && !data->fan_min[0])
 924                         data->alarms &= ~0x40;
 925 
 926                 if (!data->fan[1] && data->fan_min[1])
 927                         data->alarms |= 0x80;
 928                 else if (data->fan[1] && !data->fan_min[1])
 929                         data->alarms &= ~0x80;
 930 
 931                 data->last_updated = jiffies;
 932                 data->valid = 1;
 933         }
 934 
 935         mutex_unlock(&data->update_lock);
 936 
 937         return data;
 938 }
 939 
 940 static int vt8231_device_add(unsigned short address)
 941 {
 942         struct resource res = {
 943                 .start  = address,
 944                 .end    = address + VT8231_EXTENT - 1,
 945                 .name   = "vt8231",
 946                 .flags  = IORESOURCE_IO,
 947         };
 948         int err;
 949 
 950         err = acpi_check_resource_conflict(&res);
 951         if (err)
 952                 goto exit;
 953 
 954         pdev = platform_device_alloc("vt8231", address);
 955         if (!pdev) {
 956                 err = -ENOMEM;
 957                 pr_err("Device allocation failed\n");
 958                 goto exit;
 959         }
 960 
 961         err = platform_device_add_resources(pdev, &res, 1);
 962         if (err) {
 963                 pr_err("Device resource addition failed (%d)\n", err);
 964                 goto exit_device_put;
 965         }
 966 
 967         err = platform_device_add(pdev);
 968         if (err) {
 969                 pr_err("Device addition failed (%d)\n", err);
 970                 goto exit_device_put;
 971         }
 972 
 973         return 0;
 974 
 975 exit_device_put:
 976         platform_device_put(pdev);
 977 exit:
 978         return err;
 979 }
 980 
 981 static int vt8231_pci_probe(struct pci_dev *dev,
 982                                 const struct pci_device_id *id)
 983 {
 984         u16 address, val;
 985         if (force_addr) {
 986                 address = force_addr & 0xff00;
 987                 dev_warn(&dev->dev, "Forcing ISA address 0x%x\n",
 988                          address);
 989 
 990                 if (PCIBIOS_SUCCESSFUL !=
 991                     pci_write_config_word(dev, VT8231_BASE_REG, address | 1))
 992                         return -ENODEV;
 993         }
 994 
 995         if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_BASE_REG,
 996                                                         &val))
 997                 return -ENODEV;
 998 
 999         address = val & ~(VT8231_EXTENT - 1);
1000         if (address == 0) {
1001                 dev_err(&dev->dev, "base address not set - upgrade BIOS or use force_addr=0xaddr\n");
1002                 return -ENODEV;
1003         }
1004 
1005         if (PCIBIOS_SUCCESSFUL != pci_read_config_word(dev, VT8231_ENABLE_REG,
1006                                                         &val))
1007                 return -ENODEV;
1008 
1009         if (!(val & 0x0001)) {
1010                 dev_warn(&dev->dev, "enabling sensors\n");
1011                 if (PCIBIOS_SUCCESSFUL !=
1012                         pci_write_config_word(dev, VT8231_ENABLE_REG,
1013                                                         val | 0x0001))
1014                         return -ENODEV;
1015         }
1016 
1017         if (platform_driver_register(&vt8231_driver))
1018                 goto exit;
1019 
1020         /* Sets global pdev as a side effect */
1021         if (vt8231_device_add(address))
1022                 goto exit_unregister;
1023 
1024         /*
1025          * Always return failure here.  This is to allow other drivers to bind
1026          * to this pci device.  We don't really want to have control over the
1027          * pci device, we only wanted to read as few register values from it.
1028          */
1029 
1030         /*
1031          * We do, however, mark ourselves as using the PCI device to stop it
1032          * getting unloaded.
1033          */
1034         s_bridge = pci_dev_get(dev);
1035         return -ENODEV;
1036 
1037 exit_unregister:
1038         platform_driver_unregister(&vt8231_driver);
1039 exit:
1040         return -ENODEV;
1041 }
1042 
1043 static int __init sm_vt8231_init(void)
1044 {
1045         return pci_register_driver(&vt8231_pci_driver);
1046 }
1047 
1048 static void __exit sm_vt8231_exit(void)
1049 {
1050         pci_unregister_driver(&vt8231_pci_driver);
1051         if (s_bridge != NULL) {
1052                 platform_device_unregister(pdev);
1053                 platform_driver_unregister(&vt8231_driver);
1054                 pci_dev_put(s_bridge);
1055                 s_bridge = NULL;
1056         }
1057 }
1058 
1059 MODULE_AUTHOR("Roger Lucas <vt8231@hiddenengine.co.uk>");
1060 MODULE_DESCRIPTION("VT8231 sensors");
1061 MODULE_LICENSE("GPL");
1062 
1063 module_init(sm_vt8231_init);
1064 module_exit(sm_vt8231_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hwmon/vt8231.c

DEFINITIONS
