linux/drivers/hwmon/gl520sm.c
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   1/*
   2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
   3 *             monitoring
   4 * Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>,
   5 *                           Kyösti Mälkki <kmalkki@cc.hut.fi>
   6 * Copyright (c) 2005   Maarten Deprez <maartendeprez@users.sourceforge.net>
   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
  24#include <linux/module.h>
  25#include <linux/init.h>
  26#include <linux/slab.h>
  27#include <linux/jiffies.h>
  28#include <linux/i2c.h>
  29#include <linux/hwmon.h>
  30#include <linux/hwmon-sysfs.h>
  31#include <linux/hwmon-vid.h>
  32#include <linux/err.h>
  33#include <linux/mutex.h>
  34#include <linux/sysfs.h>
  35
  36/* Type of the extra sensor */
  37static unsigned short extra_sensor_type;
  38module_param(extra_sensor_type, ushort, 0);
  39MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
  40
  41/* Addresses to scan */
  42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
  43
  44/*
  45 * Many GL520 constants specified below
  46 * One of the inputs can be configured as either temp or voltage.
  47 * That's why _TEMP2 and _IN4 access the same register
  48 */
  49
  50/* The GL520 registers */
  51#define GL520_REG_CHIP_ID               0x00
  52#define GL520_REG_REVISION              0x01
  53#define GL520_REG_CONF                  0x03
  54#define GL520_REG_MASK                  0x11
  55
  56#define GL520_REG_VID_INPUT             0x02
  57
  58static const u8 GL520_REG_IN_INPUT[]    = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
  59static const u8 GL520_REG_IN_LIMIT[]    = { 0x0c, 0x09, 0x0a, 0x0b };
  60static const u8 GL520_REG_IN_MIN[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
  61static const u8 GL520_REG_IN_MAX[]      = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
  62
  63static const u8 GL520_REG_TEMP_INPUT[]          = { 0x04, 0x0e };
  64static const u8 GL520_REG_TEMP_MAX[]            = { 0x05, 0x17 };
  65static const u8 GL520_REG_TEMP_MAX_HYST[]       = { 0x06, 0x18 };
  66
  67#define GL520_REG_FAN_INPUT             0x07
  68#define GL520_REG_FAN_MIN               0x08
  69#define GL520_REG_FAN_DIV               0x0f
  70#define GL520_REG_FAN_OFF               GL520_REG_FAN_DIV
  71
  72#define GL520_REG_ALARMS                0x12
  73#define GL520_REG_BEEP_MASK             0x10
  74#define GL520_REG_BEEP_ENABLE           GL520_REG_CONF
  75
  76/*
  77 * Function declarations
  78 */
  79
  80static int gl520_probe(struct i2c_client *client,
  81                       const struct i2c_device_id *id);
  82static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
  83static void gl520_init_client(struct i2c_client *client);
  84static int gl520_remove(struct i2c_client *client);
  85static int gl520_read_value(struct i2c_client *client, u8 reg);
  86static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
  87static struct gl520_data *gl520_update_device(struct device *dev);
  88
  89/* Driver data */
  90static const struct i2c_device_id gl520_id[] = {
  91        { "gl520sm", 0 },
  92        { }
  93};
  94MODULE_DEVICE_TABLE(i2c, gl520_id);
  95
  96static struct i2c_driver gl520_driver = {
  97        .class          = I2C_CLASS_HWMON,
  98        .driver = {
  99                .name   = "gl520sm",
 100        },
 101        .probe          = gl520_probe,
 102        .remove         = gl520_remove,
 103        .id_table       = gl520_id,
 104        .detect         = gl520_detect,
 105        .address_list   = normal_i2c,
 106};
 107
 108/* Client data */
 109struct gl520_data {
 110        struct device *hwmon_dev;
 111        struct mutex update_lock;
 112        char valid;             /* zero until the following fields are valid */
 113        unsigned long last_updated;     /* in jiffies */
 114
 115        u8 vid;
 116        u8 vrm;
 117        u8 in_input[5];         /* [0] = VVD */
 118        u8 in_min[5];           /* [0] = VDD */
 119        u8 in_max[5];           /* [0] = VDD */
 120        u8 fan_input[2];
 121        u8 fan_min[2];
 122        u8 fan_div[2];
 123        u8 fan_off;
 124        u8 temp_input[2];
 125        u8 temp_max[2];
 126        u8 temp_max_hyst[2];
 127        u8 alarms;
 128        u8 beep_enable;
 129        u8 beep_mask;
 130        u8 alarm_mask;
 131        u8 two_temps;
 132};
 133
 134/*
 135 * Sysfs stuff
 136 */
 137
 138static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
 139                           char *buf)
 140{
 141        struct gl520_data *data = gl520_update_device(dev);
 142        return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 143}
 144static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
 145
 146#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
 147#define VDD_TO_REG(val) SENSORS_LIMIT((((val) * 4 + 47) / 95), 0, 255)
 148
 149#define IN_FROM_REG(val) ((val) * 19)
 150#define IN_TO_REG(val) SENSORS_LIMIT((((val) + 9) / 19), 0, 255)
 151
 152static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
 153                            char *buf)
 154{
 155        int n = to_sensor_dev_attr(attr)->index;
 156        struct gl520_data *data = gl520_update_device(dev);
 157        u8 r = data->in_input[n];
 158
 159        if (n == 0)
 160                return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 161        else
 162                return sprintf(buf, "%d\n", IN_FROM_REG(r));
 163}
 164
 165static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
 166                          char *buf)
 167{
 168        int n = to_sensor_dev_attr(attr)->index;
 169        struct gl520_data *data = gl520_update_device(dev);
 170        u8 r = data->in_min[n];
 171
 172        if (n == 0)
 173                return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 174        else
 175                return sprintf(buf, "%d\n", IN_FROM_REG(r));
 176}
 177
 178static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
 179                          char *buf)
 180{
 181        int n = to_sensor_dev_attr(attr)->index;
 182        struct gl520_data *data = gl520_update_device(dev);
 183        u8 r = data->in_max[n];
 184
 185        if (n == 0)
 186                return sprintf(buf, "%d\n", VDD_FROM_REG(r));
 187        else
 188                return sprintf(buf, "%d\n", IN_FROM_REG(r));
 189}
 190
 191static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 192                          const char *buf, size_t count)
 193{
 194        struct i2c_client *client = to_i2c_client(dev);
 195        struct gl520_data *data = i2c_get_clientdata(client);
 196        int n = to_sensor_dev_attr(attr)->index;
 197        u8 r;
 198        long v;
 199        int err;
 200
 201        err = kstrtol(buf, 10, &v);
 202        if (err)
 203                return err;
 204
 205        mutex_lock(&data->update_lock);
 206
 207        if (n == 0)
 208                r = VDD_TO_REG(v);
 209        else
 210                r = IN_TO_REG(v);
 211
 212        data->in_min[n] = r;
 213
 214        if (n < 4)
 215                gl520_write_value(client, GL520_REG_IN_MIN[n],
 216                                  (gl520_read_value(client, GL520_REG_IN_MIN[n])
 217                                   & ~0xff) | r);
 218        else
 219                gl520_write_value(client, GL520_REG_IN_MIN[n], r);
 220
 221        mutex_unlock(&data->update_lock);
 222        return count;
 223}
 224
 225static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 226                          const char *buf, size_t count)
 227{
 228        struct i2c_client *client = to_i2c_client(dev);
 229        struct gl520_data *data = i2c_get_clientdata(client);
 230        int n = to_sensor_dev_attr(attr)->index;
 231        u8 r;
 232        long v;
 233        int err;
 234
 235        err = kstrtol(buf, 10, &v);
 236        if (err)
 237                return err;
 238
 239        if (n == 0)
 240                r = VDD_TO_REG(v);
 241        else
 242                r = IN_TO_REG(v);
 243
 244        mutex_lock(&data->update_lock);
 245
 246        data->in_max[n] = r;
 247
 248        if (n < 4)
 249                gl520_write_value(client, GL520_REG_IN_MAX[n],
 250                                  (gl520_read_value(client, GL520_REG_IN_MAX[n])
 251                                   & ~0xff00) | (r << 8));
 252        else
 253                gl520_write_value(client, GL520_REG_IN_MAX[n], r);
 254
 255        mutex_unlock(&data->update_lock);
 256        return count;
 257}
 258
 259static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
 260static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
 261static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
 262static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
 263static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
 264static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
 265                get_in_min, set_in_min, 0);
 266static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
 267                get_in_min, set_in_min, 1);
 268static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
 269                get_in_min, set_in_min, 2);
 270static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
 271                get_in_min, set_in_min, 3);
 272static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
 273                get_in_min, set_in_min, 4);
 274static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
 275                get_in_max, set_in_max, 0);
 276static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
 277                get_in_max, set_in_max, 1);
 278static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
 279                get_in_max, set_in_max, 2);
 280static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
 281                get_in_max, set_in_max, 3);
 282static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
 283                get_in_max, set_in_max, 4);
 284
 285#define DIV_FROM_REG(val) (1 << (val))
 286#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
 287#define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
 288        SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, \
 289                      255))
 290
 291static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
 292                             char *buf)
 293{
 294        int n = to_sensor_dev_attr(attr)->index;
 295        struct gl520_data *data = gl520_update_device(dev);
 296
 297        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
 298                                                 data->fan_div[n]));
 299}
 300
 301static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
 302                           char *buf)
 303{
 304        int n = to_sensor_dev_attr(attr)->index;
 305        struct gl520_data *data = gl520_update_device(dev);
 306
 307        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
 308                                                 data->fan_div[n]));
 309}
 310
 311static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
 312                           char *buf)
 313{
 314        int n = to_sensor_dev_attr(attr)->index;
 315        struct gl520_data *data = gl520_update_device(dev);
 316
 317        return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
 318}
 319
 320static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
 321                           char *buf)
 322{
 323        struct gl520_data *data = gl520_update_device(dev);
 324        return sprintf(buf, "%d\n", data->fan_off);
 325}
 326
 327static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 328                           const char *buf, size_t count)
 329{
 330        struct i2c_client *client = to_i2c_client(dev);
 331        struct gl520_data *data = i2c_get_clientdata(client);
 332        int n = to_sensor_dev_attr(attr)->index;
 333        u8 r;
 334        unsigned long v;
 335        int err;
 336
 337        err = kstrtoul(buf, 10, &v);
 338        if (err)
 339                return err;
 340
 341        mutex_lock(&data->update_lock);
 342        r = FAN_TO_REG(v, data->fan_div[n]);
 343        data->fan_min[n] = r;
 344
 345        if (n == 0)
 346                gl520_write_value(client, GL520_REG_FAN_MIN,
 347                                  (gl520_read_value(client, GL520_REG_FAN_MIN)
 348                                   & ~0xff00) | (r << 8));
 349        else
 350                gl520_write_value(client, GL520_REG_FAN_MIN,
 351                                  (gl520_read_value(client, GL520_REG_FAN_MIN)
 352                                   & ~0xff) | r);
 353
 354        data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 355        if (data->fan_min[n] == 0)
 356                data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
 357        else
 358                data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
 359        data->beep_mask &= data->alarm_mask;
 360        gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 361
 362        mutex_unlock(&data->update_lock);
 363        return count;
 364}
 365
 366static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 367                           const char *buf, size_t count)
 368{
 369        struct i2c_client *client = to_i2c_client(dev);
 370        struct gl520_data *data = i2c_get_clientdata(client);
 371        int n = to_sensor_dev_attr(attr)->index;
 372        u8 r;
 373        unsigned long v;
 374        int err;
 375
 376        err = kstrtoul(buf, 10, &v);
 377        if (err)
 378                return err;
 379
 380        switch (v) {
 381        case 1:
 382                r = 0;
 383                break;
 384        case 2:
 385                r = 1;
 386                break;
 387        case 4:
 388                r = 2;
 389                break;
 390        case 8:
 391                r = 3;
 392                break;
 393        default:
 394                dev_err(&client->dev,
 395        "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
 396                return -EINVAL;
 397        }
 398
 399        mutex_lock(&data->update_lock);
 400        data->fan_div[n] = r;
 401
 402        if (n == 0)
 403                gl520_write_value(client, GL520_REG_FAN_DIV,
 404                                  (gl520_read_value(client, GL520_REG_FAN_DIV)
 405                                   & ~0xc0) | (r << 6));
 406        else
 407                gl520_write_value(client, GL520_REG_FAN_DIV,
 408                                  (gl520_read_value(client, GL520_REG_FAN_DIV)
 409                                   & ~0x30) | (r << 4));
 410
 411        mutex_unlock(&data->update_lock);
 412        return count;
 413}
 414
 415static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
 416                           const char *buf, size_t count)
 417{
 418        struct i2c_client *client = to_i2c_client(dev);
 419        struct gl520_data *data = i2c_get_clientdata(client);
 420        u8 r;
 421        unsigned long v;
 422        int err;
 423
 424        err = kstrtoul(buf, 10, &v);
 425        if (err)
 426                return err;
 427
 428        r = (v ? 1 : 0);
 429
 430        mutex_lock(&data->update_lock);
 431        data->fan_off = r;
 432        gl520_write_value(client, GL520_REG_FAN_OFF,
 433                          (gl520_read_value(client, GL520_REG_FAN_OFF)
 434                           & ~0x0c) | (r << 2));
 435        mutex_unlock(&data->update_lock);
 436        return count;
 437}
 438
 439static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
 440static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
 441static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
 442                get_fan_min, set_fan_min, 0);
 443static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
 444                get_fan_min, set_fan_min, 1);
 445static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
 446                get_fan_div, set_fan_div, 0);
 447static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
 448                get_fan_div, set_fan_div, 1);
 449static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
 450                get_fan_off, set_fan_off);
 451
 452#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
 453#define TEMP_TO_REG(val) SENSORS_LIMIT(((((val) < 0 ? \
 454                        (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
 455
 456static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
 457                              char *buf)
 458{
 459        int n = to_sensor_dev_attr(attr)->index;
 460        struct gl520_data *data = gl520_update_device(dev);
 461
 462        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
 463}
 464
 465static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
 466                            char *buf)
 467{
 468        int n = to_sensor_dev_attr(attr)->index;
 469        struct gl520_data *data = gl520_update_device(dev);
 470
 471        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
 472}
 473
 474static ssize_t get_temp_max_hyst(struct device *dev,
 475                                 struct device_attribute *attr, char *buf)
 476{
 477        int n = to_sensor_dev_attr(attr)->index;
 478        struct gl520_data *data = gl520_update_device(dev);
 479
 480        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
 481}
 482
 483static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 484                            const char *buf, size_t count)
 485{
 486        struct i2c_client *client = to_i2c_client(dev);
 487        struct gl520_data *data = i2c_get_clientdata(client);
 488        int n = to_sensor_dev_attr(attr)->index;
 489        long v;
 490        int err;
 491
 492        err = kstrtol(buf, 10, &v);
 493        if (err)
 494                return err;
 495
 496        mutex_lock(&data->update_lock);
 497        data->temp_max[n] = TEMP_TO_REG(v);
 498        gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
 499        mutex_unlock(&data->update_lock);
 500        return count;
 501}
 502
 503static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
 504                                 *attr, const char *buf, size_t count)
 505{
 506        struct i2c_client *client = to_i2c_client(dev);
 507        struct gl520_data *data = i2c_get_clientdata(client);
 508        int n = to_sensor_dev_attr(attr)->index;
 509        long v;
 510        int err;
 511
 512        err = kstrtol(buf, 10, &v);
 513        if (err)
 514                return err;
 515
 516        mutex_lock(&data->update_lock);
 517        data->temp_max_hyst[n] = TEMP_TO_REG(v);
 518        gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
 519                          data->temp_max_hyst[n]);
 520        mutex_unlock(&data->update_lock);
 521        return count;
 522}
 523
 524static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
 525static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
 526static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
 527                get_temp_max, set_temp_max, 0);
 528static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
 529                get_temp_max, set_temp_max, 1);
 530static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 531                get_temp_max_hyst, set_temp_max_hyst, 0);
 532static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
 533                get_temp_max_hyst, set_temp_max_hyst, 1);
 534
 535static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
 536                          char *buf)
 537{
 538        struct gl520_data *data = gl520_update_device(dev);
 539        return sprintf(buf, "%d\n", data->alarms);
 540}
 541
 542static ssize_t get_beep_enable(struct device *dev, struct device_attribute
 543                               *attr, char *buf)
 544{
 545        struct gl520_data *data = gl520_update_device(dev);
 546        return sprintf(buf, "%d\n", data->beep_enable);
 547}
 548
 549static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
 550                             char *buf)
 551{
 552        struct gl520_data *data = gl520_update_device(dev);
 553        return sprintf(buf, "%d\n", data->beep_mask);
 554}
 555
 556static ssize_t set_beep_enable(struct device *dev, struct device_attribute
 557                               *attr, const char *buf, size_t count)
 558{
 559        struct i2c_client *client = to_i2c_client(dev);
 560        struct gl520_data *data = i2c_get_clientdata(client);
 561        u8 r;
 562        unsigned long v;
 563        int err;
 564
 565        err = kstrtoul(buf, 10, &v);
 566        if (err)
 567                return err;
 568
 569        r = (v ? 0 : 1);
 570
 571        mutex_lock(&data->update_lock);
 572        data->beep_enable = !r;
 573        gl520_write_value(client, GL520_REG_BEEP_ENABLE,
 574                          (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
 575                           & ~0x04) | (r << 2));
 576        mutex_unlock(&data->update_lock);
 577        return count;
 578}
 579
 580static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
 581                             const char *buf, size_t count)
 582{
 583        struct i2c_client *client = to_i2c_client(dev);
 584        struct gl520_data *data = i2c_get_clientdata(client);
 585        unsigned long r;
 586        int err;
 587
 588        err = kstrtoul(buf, 10, &r);
 589        if (err)
 590                return err;
 591
 592        mutex_lock(&data->update_lock);
 593        r &= data->alarm_mask;
 594        data->beep_mask = r;
 595        gl520_write_value(client, GL520_REG_BEEP_MASK, r);
 596        mutex_unlock(&data->update_lock);
 597        return count;
 598}
 599
 600static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
 601static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
 602                get_beep_enable, set_beep_enable);
 603static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
 604                get_beep_mask, set_beep_mask);
 605
 606static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
 607                         char *buf)
 608{
 609        int bit_nr = to_sensor_dev_attr(attr)->index;
 610        struct gl520_data *data = gl520_update_device(dev);
 611
 612        return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
 613}
 614
 615static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
 616static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
 617static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
 618static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
 619static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
 620static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
 621static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
 622static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
 623static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
 624
 625static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
 626                        char *buf)
 627{
 628        int bitnr = to_sensor_dev_attr(attr)->index;
 629        struct gl520_data *data = gl520_update_device(dev);
 630
 631        return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
 632}
 633
 634static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
 635                        const char *buf, size_t count)
 636{
 637        struct i2c_client *client = to_i2c_client(dev);
 638        struct gl520_data *data = i2c_get_clientdata(client);
 639        int bitnr = to_sensor_dev_attr(attr)->index;
 640        unsigned long bit;
 641
 642        int err;
 643
 644        err = kstrtoul(buf, 10, &bit);
 645        if (err)
 646                return err;
 647        if (bit & ~1)
 648                return -EINVAL;
 649
 650        mutex_lock(&data->update_lock);
 651        data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 652        if (bit)
 653                data->beep_mask |= (1 << bitnr);
 654        else
 655                data->beep_mask &= ~(1 << bitnr);
 656        gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 657        mutex_unlock(&data->update_lock);
 658        return count;
 659}
 660
 661static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
 662static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
 663static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
 664static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
 665static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
 666static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
 667static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
 668static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 669static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
 670
 671static struct attribute *gl520_attributes[] = {
 672        &dev_attr_cpu0_vid.attr,
 673
 674        &sensor_dev_attr_in0_input.dev_attr.attr,
 675        &sensor_dev_attr_in0_min.dev_attr.attr,
 676        &sensor_dev_attr_in0_max.dev_attr.attr,
 677        &sensor_dev_attr_in0_alarm.dev_attr.attr,
 678        &sensor_dev_attr_in0_beep.dev_attr.attr,
 679        &sensor_dev_attr_in1_input.dev_attr.attr,
 680        &sensor_dev_attr_in1_min.dev_attr.attr,
 681        &sensor_dev_attr_in1_max.dev_attr.attr,
 682        &sensor_dev_attr_in1_alarm.dev_attr.attr,
 683        &sensor_dev_attr_in1_beep.dev_attr.attr,
 684        &sensor_dev_attr_in2_input.dev_attr.attr,
 685        &sensor_dev_attr_in2_min.dev_attr.attr,
 686        &sensor_dev_attr_in2_max.dev_attr.attr,
 687        &sensor_dev_attr_in2_alarm.dev_attr.attr,
 688        &sensor_dev_attr_in2_beep.dev_attr.attr,
 689        &sensor_dev_attr_in3_input.dev_attr.attr,
 690        &sensor_dev_attr_in3_min.dev_attr.attr,
 691        &sensor_dev_attr_in3_max.dev_attr.attr,
 692        &sensor_dev_attr_in3_alarm.dev_attr.attr,
 693        &sensor_dev_attr_in3_beep.dev_attr.attr,
 694
 695        &sensor_dev_attr_fan1_input.dev_attr.attr,
 696        &sensor_dev_attr_fan1_min.dev_attr.attr,
 697        &sensor_dev_attr_fan1_div.dev_attr.attr,
 698        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 699        &sensor_dev_attr_fan1_beep.dev_attr.attr,
 700        &dev_attr_fan1_off.attr,
 701        &sensor_dev_attr_fan2_input.dev_attr.attr,
 702        &sensor_dev_attr_fan2_min.dev_attr.attr,
 703        &sensor_dev_attr_fan2_div.dev_attr.attr,
 704        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 705        &sensor_dev_attr_fan2_beep.dev_attr.attr,
 706
 707        &sensor_dev_attr_temp1_input.dev_attr.attr,
 708        &sensor_dev_attr_temp1_max.dev_attr.attr,
 709        &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 710        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 711        &sensor_dev_attr_temp1_beep.dev_attr.attr,
 712
 713        &dev_attr_alarms.attr,
 714        &dev_attr_beep_enable.attr,
 715        &dev_attr_beep_mask.attr,
 716        NULL
 717};
 718
 719static const struct attribute_group gl520_group = {
 720        .attrs = gl520_attributes,
 721};
 722
 723static struct attribute *gl520_attributes_in4[] = {
 724        &sensor_dev_attr_in4_input.dev_attr.attr,
 725        &sensor_dev_attr_in4_min.dev_attr.attr,
 726        &sensor_dev_attr_in4_max.dev_attr.attr,
 727        &sensor_dev_attr_in4_alarm.dev_attr.attr,
 728        &sensor_dev_attr_in4_beep.dev_attr.attr,
 729        NULL
 730};
 731
 732static struct attribute *gl520_attributes_temp2[] = {
 733        &sensor_dev_attr_temp2_input.dev_attr.attr,
 734        &sensor_dev_attr_temp2_max.dev_attr.attr,
 735        &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 736        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 737        &sensor_dev_attr_temp2_beep.dev_attr.attr,
 738        NULL
 739};
 740
 741static const struct attribute_group gl520_group_in4 = {
 742        .attrs = gl520_attributes_in4,
 743};
 744
 745static const struct attribute_group gl520_group_temp2 = {
 746        .attrs = gl520_attributes_temp2,
 747};
 748
 749
 750/*
 751 * Real code
 752 */
 753
 754/* Return 0 if detection is successful, -ENODEV otherwise */
 755static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
 756{
 757        struct i2c_adapter *adapter = client->adapter;
 758
 759        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 760                                     I2C_FUNC_SMBUS_WORD_DATA))
 761                return -ENODEV;
 762
 763        /* Determine the chip type. */
 764        if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
 765            ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
 766            ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
 767                dev_dbg(&client->dev, "Unknown chip type, skipping\n");
 768                return -ENODEV;
 769        }
 770
 771        strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
 772
 773        return 0;
 774}
 775
 776static int gl520_probe(struct i2c_client *client,
 777                       const struct i2c_device_id *id)
 778{
 779        struct gl520_data *data;
 780        int err;
 781
 782        data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
 783                            GFP_KERNEL);
 784        if (!data)
 785                return -ENOMEM;
 786
 787        i2c_set_clientdata(client, data);
 788        mutex_init(&data->update_lock);
 789
 790        /* Initialize the GL520SM chip */
 791        gl520_init_client(client);
 792
 793        /* Register sysfs hooks */
 794        err = sysfs_create_group(&client->dev.kobj, &gl520_group);
 795        if (err)
 796                return err;
 797
 798        if (data->two_temps)
 799                err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
 800        else
 801                err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
 802
 803        if (err)
 804                goto exit_remove_files;
 805
 806        data->hwmon_dev = hwmon_device_register(&client->dev);
 807        if (IS_ERR(data->hwmon_dev)) {
 808                err = PTR_ERR(data->hwmon_dev);
 809                goto exit_remove_files;
 810        }
 811
 812        return 0;
 813
 814exit_remove_files:
 815        sysfs_remove_group(&client->dev.kobj, &gl520_group);
 816        sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
 817        sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
 818        return err;
 819}
 820
 821
 822/* Called when we have found a new GL520SM. */
 823static void gl520_init_client(struct i2c_client *client)
 824{
 825        struct gl520_data *data = i2c_get_clientdata(client);
 826        u8 oldconf, conf;
 827
 828        conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
 829
 830        data->alarm_mask = 0xff;
 831        data->vrm = vid_which_vrm();
 832
 833        if (extra_sensor_type == 1)
 834                conf &= ~0x10;
 835        else if (extra_sensor_type == 2)
 836                conf |= 0x10;
 837        data->two_temps = !(conf & 0x10);
 838
 839        /* If IRQ# is disabled, we can safely force comparator mode */
 840        if (!(conf & 0x20))
 841                conf &= 0xf7;
 842
 843        /* Enable monitoring if needed */
 844        conf |= 0x40;
 845
 846        if (conf != oldconf)
 847                gl520_write_value(client, GL520_REG_CONF, conf);
 848
 849        gl520_update_device(&(client->dev));
 850
 851        if (data->fan_min[0] == 0)
 852                data->alarm_mask &= ~0x20;
 853        if (data->fan_min[1] == 0)
 854                data->alarm_mask &= ~0x40;
 855
 856        data->beep_mask &= data->alarm_mask;
 857        gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
 858}
 859
 860static int gl520_remove(struct i2c_client *client)
 861{
 862        struct gl520_data *data = i2c_get_clientdata(client);
 863
 864        hwmon_device_unregister(data->hwmon_dev);
 865        sysfs_remove_group(&client->dev.kobj, &gl520_group);
 866        sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
 867        sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
 868
 869        return 0;
 870}
 871
 872
 873/*
 874 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
 875 * GL520 uses a high-byte first convention
 876 */
 877static int gl520_read_value(struct i2c_client *client, u8 reg)
 878{
 879        if ((reg >= 0x07) && (reg <= 0x0c))
 880                return i2c_smbus_read_word_swapped(client, reg);
 881        else
 882                return i2c_smbus_read_byte_data(client, reg);
 883}
 884
 885static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
 886{
 887        if ((reg >= 0x07) && (reg <= 0x0c))
 888                return i2c_smbus_write_word_swapped(client, reg, value);
 889        else
 890                return i2c_smbus_write_byte_data(client, reg, value);
 891}
 892
 893
 894static struct gl520_data *gl520_update_device(struct device *dev)
 895{
 896        struct i2c_client *client = to_i2c_client(dev);
 897        struct gl520_data *data = i2c_get_clientdata(client);
 898        int val, i;
 899
 900        mutex_lock(&data->update_lock);
 901
 902        if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
 903
 904                dev_dbg(&client->dev, "Starting gl520sm update\n");
 905
 906                data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
 907                data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
 908                data->vid = gl520_read_value(client,
 909                                             GL520_REG_VID_INPUT) & 0x1f;
 910
 911                for (i = 0; i < 4; i++) {
 912                        data->in_input[i] = gl520_read_value(client,
 913                                                        GL520_REG_IN_INPUT[i]);
 914                        val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
 915                        data->in_min[i] = val & 0xff;
 916                        data->in_max[i] = (val >> 8) & 0xff;
 917                }
 918
 919                val = gl520_read_value(client, GL520_REG_FAN_INPUT);
 920                data->fan_input[0] = (val >> 8) & 0xff;
 921                data->fan_input[1] = val & 0xff;
 922
 923                val = gl520_read_value(client, GL520_REG_FAN_MIN);
 924                data->fan_min[0] = (val >> 8) & 0xff;
 925                data->fan_min[1] = val & 0xff;
 926
 927                data->temp_input[0] = gl520_read_value(client,
 928                                                GL520_REG_TEMP_INPUT[0]);
 929                data->temp_max[0] = gl520_read_value(client,
 930                                                GL520_REG_TEMP_MAX[0]);
 931                data->temp_max_hyst[0] = gl520_read_value(client,
 932                                                GL520_REG_TEMP_MAX_HYST[0]);
 933
 934                val = gl520_read_value(client, GL520_REG_FAN_DIV);
 935                data->fan_div[0] = (val >> 6) & 0x03;
 936                data->fan_div[1] = (val >> 4) & 0x03;
 937                data->fan_off = (val >> 2) & 0x01;
 938
 939                data->alarms &= data->alarm_mask;
 940
 941                val = gl520_read_value(client, GL520_REG_CONF);
 942                data->beep_enable = !((val >> 2) & 1);
 943
 944                /* Temp1 and Vin4 are the same input */
 945                if (data->two_temps) {
 946                        data->temp_input[1] = gl520_read_value(client,
 947                                                GL520_REG_TEMP_INPUT[1]);
 948                        data->temp_max[1] = gl520_read_value(client,
 949                                                GL520_REG_TEMP_MAX[1]);
 950                        data->temp_max_hyst[1] = gl520_read_value(client,
 951                                                GL520_REG_TEMP_MAX_HYST[1]);
 952                } else {
 953                        data->in_input[4] = gl520_read_value(client,
 954                                                GL520_REG_IN_INPUT[4]);
 955                        data->in_min[4] = gl520_read_value(client,
 956                                                GL520_REG_IN_MIN[4]);
 957                        data->in_max[4] = gl520_read_value(client,
 958                                                GL520_REG_IN_MAX[4]);
 959                }
 960
 961                data->last_updated = jiffies;
 962                data->valid = 1;
 963        }
 964
 965        mutex_unlock(&data->update_lock);
 966
 967        return data;
 968}
 969
 970module_i2c_driver(gl520_driver);
 971
 972MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
 973        "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
 974        "Maarten Deprez <maartendeprez@users.sourceforge.net>");
 975MODULE_DESCRIPTION("GL520SM driver");
 976MODULE_LICENSE("GPL");
 977
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