drivers/hwmon/asb100.c

   1 /*
   2     asb100.c - Part of lm_sensors, Linux kernel modules for hardware
   3                 monitoring
   4
   5     Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
   6
   7         (derived from w83781d.c)
   8
   9     Copyright (C) 1998 - 2003  Frodo Looijaard <frodol@dds.nl>,
  10     Philip Edelbrock <phil@netroedge.com>, and
  11     Mark Studebaker <mdsxyz123@yahoo.com>
  12
  13     This program is free software; you can redistribute it and/or modify
  14     it under the terms of the GNU General Public License as published by
  15     the Free Software Foundation; either version 2 of the License, or
  16     (at your option) any later version.
  17
  18     This program is distributed in the hope that it will be useful,
  19     but WITHOUT ANY WARRANTY; without even the implied warranty of
  20     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21     GNU General Public License for more details.
  22
  23     You should have received a copy of the GNU General Public License
  24     along with this program; if not, write to the Free Software
  25     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26 */
  27
  28 /*
  29     This driver supports the hardware sensor chips: Asus ASB100 and
  30     ASB100-A "BACH".
  31
  32     ASB100-A supports pwm1, while plain ASB100 does not.  There is no known
  33     way for the driver to tell which one is there.
  34
  35     Chip        #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  36     asb100      7       3       1       4       0x31    0x0694  yes     no
  37 */
  38
  39 #include <linux/module.h>
  40 #include <linux/slab.h>
  41 #include <linux/i2c.h>
  42 #include <linux/hwmon.h>
  43 #include <linux/hwmon-vid.h>
  44 #include <linux/err.h>
  45 #include <linux/init.h>
  46 #include <linux/jiffies.h>
  47 #include "lm75.h"
  48
  49 /*
  50         HISTORY:
  51         2003-12-29      1.0.0   Ported from lm_sensors project for kernel 2.6
  52 */
  53 #define ASB100_VERSION "1.0.0"
  54
  55 /* I2C addresses to scan */
  56 static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
  57
  58 /* Insmod parameters */
  59 I2C_CLIENT_INSMOD_1(asb100);
  60 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
  61         "{bus, clientaddr, subclientaddr1, subclientaddr2}");
  62
  63 /* Voltage IN registers 0-6 */
  64 #define ASB100_REG_IN(nr)       (0x20 + (nr))
  65 #define ASB100_REG_IN_MAX(nr)   (0x2b + (nr * 2))
  66 #define ASB100_REG_IN_MIN(nr)   (0x2c + (nr * 2))
  67
  68 /* FAN IN registers 1-3 */
  69 #define ASB100_REG_FAN(nr)      (0x28 + (nr))
  70 #define ASB100_REG_FAN_MIN(nr)  (0x3b + (nr))
  71
  72 /* TEMPERATURE registers 1-4 */
  73 static const u16 asb100_reg_temp[]      = {0, 0x27, 0x150, 0x250, 0x17};
  74 static const u16 asb100_reg_temp_max[]  = {0, 0x39, 0x155, 0x255, 0x18};
  75 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
  76
  77 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
  78 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
  79 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
  80
  81 #define ASB100_REG_TEMP2_CONFIG 0x0152
  82 #define ASB100_REG_TEMP3_CONFIG 0x0252
  83
  84
  85 #define ASB100_REG_CONFIG       0x40
  86 #define ASB100_REG_ALARM1       0x41
  87 #define ASB100_REG_ALARM2       0x42
  88 #define ASB100_REG_SMIM1        0x43
  89 #define ASB100_REG_SMIM2        0x44
  90 #define ASB100_REG_VID_FANDIV   0x47
  91 #define ASB100_REG_I2C_ADDR     0x48
  92 #define ASB100_REG_CHIPID       0x49
  93 #define ASB100_REG_I2C_SUBADDR  0x4a
  94 #define ASB100_REG_PIN          0x4b
  95 #define ASB100_REG_IRQ          0x4c
  96 #define ASB100_REG_BANK         0x4e
  97 #define ASB100_REG_CHIPMAN      0x4f
  98
  99 #define ASB100_REG_WCHIPID      0x58
 100
 101 /* bit 7 -> enable, bits 0-3 -> duty cycle */
 102 #define ASB100_REG_PWM1         0x59
 103
 104 /* CONVERSIONS
 105    Rounding and limit checking is only done on the TO_REG variants. */
 106
 107 /* These constants are a guess, consistent w/ w83781d */
 108 #define ASB100_IN_MIN (   0)
 109 #define ASB100_IN_MAX (4080)
 110
 111 /* IN: 1/1000 V (0V to 4.08V)
 112    REG: 16mV/bit */
 113 static u8 IN_TO_REG(unsigned val)
 114 {
 115         unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
 116         return (nval + 8) / 16;
 117 }
 118
 119 static unsigned IN_FROM_REG(u8 reg)
 120 {
 121         return reg * 16;
 122 }
 123
 124 static u8 FAN_TO_REG(long rpm, int div)
 125 {
 126         if (rpm == -1)
 127                 return 0;
 128         if (rpm == 0)
 129                 return 255;
 130         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
 131         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 132 }
 133
 134 static int FAN_FROM_REG(u8 val, int div)
 135 {
 136         return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
 137 }
 138
 139 /* These constants are a guess, consistent w/ w83781d */
 140 #define ASB100_TEMP_MIN (-128000)
 141 #define ASB100_TEMP_MAX ( 127000)
 142
 143 /* TEMP: 0.001C/bit (-128C to +127C)
 144    REG: 1C/bit, two's complement */
 145 static u8 TEMP_TO_REG(int temp)
 146 {
 147         int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
 148         ntemp += (ntemp<0 ? -500 : 500);
 149         return (u8)(ntemp / 1000);
 150 }
 151
 152 static int TEMP_FROM_REG(u8 reg)
 153 {
 154         return (s8)reg * 1000;
 155 }
 156
 157 /* PWM: 0 - 255 per sensors documentation
 158    REG: (6.25% duty cycle per bit) */
 159 static u8 ASB100_PWM_TO_REG(int pwm)
 160 {
 161         pwm = SENSORS_LIMIT(pwm, 0, 255);
 162         return (u8)(pwm / 16);
 163 }
 164
 165 static int ASB100_PWM_FROM_REG(u8 reg)
 166 {
 167         return reg * 16;
 168 }
 169
 170 #define DIV_FROM_REG(val) (1 << (val))
 171
 172 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
 173    REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
 174 static u8 DIV_TO_REG(long val)
 175 {
 176         return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
 177 }
 178
 179 /* For each registered client, we need to keep some data in memory. That
 180    data is pointed to by client->data. The structure itself is
 181    dynamically allocated, at the same time the client itself is allocated. */
 182 struct asb100_data {
 183         struct i2c_client client;
 184         struct class_device *class_dev;
 185         struct semaphore lock;
 186         enum chips type;
 187
 188         struct semaphore update_lock;
 189         unsigned long last_updated;     /* In jiffies */
 190
 191         /* array of 2 pointers to subclients */
 192         struct i2c_client *lm75[2];
 193
 194         char valid;             /* !=0 if following fields are valid */
 195         u8 in[7];               /* Register value */
 196         u8 in_max[7];           /* Register value */
 197         u8 in_min[7];           /* Register value */
 198         u8 fan[3];              /* Register value */
 199         u8 fan_min[3];          /* Register value */
 200         u16 temp[4];            /* Register value (0 and 3 are u8 only) */
 201         u16 temp_max[4];        /* Register value (0 and 3 are u8 only) */
 202         u16 temp_hyst[4];       /* Register value (0 and 3 are u8 only) */
 203         u8 fan_div[3];          /* Register encoding, right justified */
 204         u8 pwm;                 /* Register encoding */
 205         u8 vid;                 /* Register encoding, combined */
 206         u32 alarms;             /* Register encoding, combined */
 207         u8 vrm;
 208 };
 209
 210 static int asb100_read_value(struct i2c_client *client, u16 reg);
 211 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
 212
 213 static int asb100_attach_adapter(struct i2c_adapter *adapter);
 214 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
 215 static int asb100_detach_client(struct i2c_client *client);
 216 static struct asb100_data *asb100_update_device(struct device *dev);
 217 static void asb100_init_client(struct i2c_client *client);
 218
 219 static struct i2c_driver asb100_driver = {
 220         .owner          = THIS_MODULE,
 221         .name           = "asb100",
 222         .id             = I2C_DRIVERID_ASB100,
 223         .flags          = I2C_DF_NOTIFY,
 224         .attach_adapter = asb100_attach_adapter,
 225         .detach_client  = asb100_detach_client,
 226 };
 227
 228 /* 7 Voltages */
 229 #define show_in_reg(reg) \
 230 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
 231 { \
 232         struct asb100_data *data = asb100_update_device(dev); \
 233         return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
 234 }
 235
 236 show_in_reg(in)
 237 show_in_reg(in_min)
 238 show_in_reg(in_max)
 239
 240 #define set_in_reg(REG, reg) \
 241 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
 242                 size_t count, int nr) \
 243 { \
 244         struct i2c_client *client = to_i2c_client(dev); \
 245         struct asb100_data *data = i2c_get_clientdata(client); \
 246         unsigned long val = simple_strtoul(buf, NULL, 10); \
 247  \
 248         down(&data->update_lock); \
 249         data->in_##reg[nr] = IN_TO_REG(val); \
 250         asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
 251                 data->in_##reg[nr]); \
 252         up(&data->update_lock); \
 253         return count; \
 254 }
 255
 256 set_in_reg(MIN, min)
 257 set_in_reg(MAX, max)
 258
 259 #define sysfs_in(offset) \
 260 static ssize_t \
 261         show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
 262 { \
 263         return show_in(dev, buf, offset); \
 264 } \
 265 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
 266                 show_in##offset, NULL); \
 267 static ssize_t \
 268         show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
 269 { \
 270         return show_in_min(dev, buf, offset); \
 271 } \
 272 static ssize_t \
 273         show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
 274 { \
 275         return show_in_max(dev, buf, offset); \
 276 } \
 277 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
 278                 const char *buf, size_t count) \
 279 { \
 280         return set_in_min(dev, buf, count, offset); \
 281 } \
 282 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
 283                 const char *buf, size_t count) \
 284 { \
 285         return set_in_max(dev, buf, count, offset); \
 286 } \
 287 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
 288                 show_in##offset##_min, set_in##offset##_min); \
 289 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
 290                 show_in##offset##_max, set_in##offset##_max);
 291
 292 sysfs_in(0);
 293 sysfs_in(1);
 294 sysfs_in(2);
 295 sysfs_in(3);
 296 sysfs_in(4);
 297 sysfs_in(5);
 298 sysfs_in(6);
 299
 300 #define device_create_file_in(client, offset) do { \
 301         device_create_file(&client->dev, &dev_attr_in##offset##_input); \
 302         device_create_file(&client->dev, &dev_attr_in##offset##_min); \
 303         device_create_file(&client->dev, &dev_attr_in##offset##_max); \
 304 } while (0)
 305
 306 /* 3 Fans */
 307 static ssize_t show_fan(struct device *dev, char *buf, int nr)
 308 {
 309         struct asb100_data *data = asb100_update_device(dev);
 310         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 311                 DIV_FROM_REG(data->fan_div[nr])));
 312 }
 313
 314 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
 315 {
 316         struct asb100_data *data = asb100_update_device(dev);
 317         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
 318                 DIV_FROM_REG(data->fan_div[nr])));
 319 }
 320
 321 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
 322 {
 323         struct asb100_data *data = asb100_update_device(dev);
 324         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 325 }
 326
 327 static ssize_t set_fan_min(struct device *dev, const char *buf,
 328                                 size_t count, int nr)
 329 {
 330         struct i2c_client *client = to_i2c_client(dev);
 331         struct asb100_data *data = i2c_get_clientdata(client);
 332         u32 val = simple_strtoul(buf, NULL, 10);
 333
 334         down(&data->update_lock);
 335         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 336         asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
 337         up(&data->update_lock);
 338         return count;
 339 }
 340
 341 /* Note: we save and restore the fan minimum here, because its value is
 342    determined in part by the fan divisor.  This follows the principle of
 343    least suprise; the user doesn't expect the fan minimum to change just
 344    because the divisor changed. */
 345 static ssize_t set_fan_div(struct device *dev, const char *buf,
 346                                 size_t count, int nr)
 347 {
 348         struct i2c_client *client = to_i2c_client(dev);
 349         struct asb100_data *data = i2c_get_clientdata(client);
 350         unsigned long min;
 351         unsigned long val = simple_strtoul(buf, NULL, 10);
 352         int reg;
 353
 354         down(&data->update_lock);
 355
 356         min = FAN_FROM_REG(data->fan_min[nr],
 357                         DIV_FROM_REG(data->fan_div[nr]));
 358         data->fan_div[nr] = DIV_TO_REG(val);
 359
 360         switch(nr) {
 361         case 0: /* fan 1 */
 362                 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
 363                 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
 364                 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
 365                 break;
 366
 367         case 1: /* fan 2 */
 368                 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
 369                 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
 370                 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
 371                 break;
 372
 373         case 2: /* fan 3 */
 374                 reg = asb100_read_value(client, ASB100_REG_PIN);
 375                 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
 376                 asb100_write_value(client, ASB100_REG_PIN, reg);
 377                 break;
 378         }
 379
 380         data->fan_min[nr] =
 381                 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 382         asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
 383
 384         up(&data->update_lock);
 385
 386         return count;
 387 }
 388
 389 #define sysfs_fan(offset) \
 390 static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
 391 { \
 392         return show_fan(dev, buf, offset - 1); \
 393 } \
 394 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
 395 { \
 396         return show_fan_min(dev, buf, offset - 1); \
 397 } \
 398 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
 399 { \
 400         return show_fan_div(dev, buf, offset - 1); \
 401 } \
 402 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
 403                                         size_t count) \
 404 { \
 405         return set_fan_min(dev, buf, count, offset - 1); \
 406 } \
 407 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
 408                                         size_t count) \
 409 { \
 410         return set_fan_div(dev, buf, count, offset - 1); \
 411 } \
 412 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
 413                 show_fan##offset, NULL); \
 414 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
 415                 show_fan##offset##_min, set_fan##offset##_min); \
 416 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
 417                 show_fan##offset##_div, set_fan##offset##_div);
 418
 419 sysfs_fan(1);
 420 sysfs_fan(2);
 421 sysfs_fan(3);
 422
 423 #define device_create_file_fan(client, offset) do { \
 424         device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
 425         device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
 426         device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
 427 } while (0)
 428
 429 /* 4 Temp. Sensors */
 430 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
 431 {
 432         int ret = 0;
 433
 434         switch (nr) {
 435         case 1: case 2:
 436                 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
 437                 break;
 438         case 0: case 3: default:
 439                 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
 440                 break;
 441         }
 442         return ret;
 443 }
 444
 445 #define show_temp_reg(reg) \
 446 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
 447 { \
 448         struct asb100_data *data = asb100_update_device(dev); \
 449         return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
 450 }
 451
 452 show_temp_reg(temp);
 453 show_temp_reg(temp_max);
 454 show_temp_reg(temp_hyst);
 455
 456 #define set_temp_reg(REG, reg) \
 457 static ssize_t set_##reg(struct device *dev, const char *buf, \
 458                         size_t count, int nr) \
 459 { \
 460         struct i2c_client *client = to_i2c_client(dev); \
 461         struct asb100_data *data = i2c_get_clientdata(client); \
 462         unsigned long val = simple_strtoul(buf, NULL, 10); \
 463  \
 464         down(&data->update_lock); \
 465         switch (nr) { \
 466         case 1: case 2: \
 467                 data->reg[nr] = LM75_TEMP_TO_REG(val); \
 468                 break; \
 469         case 0: case 3: default: \
 470                 data->reg[nr] = TEMP_TO_REG(val); \
 471                 break; \
 472         } \
 473         asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
 474                         data->reg[nr]); \
 475         up(&data->update_lock); \
 476         return count; \
 477 }
 478
 479 set_temp_reg(MAX, temp_max);
 480 set_temp_reg(HYST, temp_hyst);
 481
 482 #define sysfs_temp(num) \
 483 static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
 484 { \
 485         return show_temp(dev, buf, num-1); \
 486 } \
 487 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
 488 static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
 489 { \
 490         return show_temp_max(dev, buf, num-1); \
 491 } \
 492 static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
 493                                         size_t count) \
 494 { \
 495         return set_temp_max(dev, buf, count, num-1); \
 496 } \
 497 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
 498                 show_temp_max##num, set_temp_max##num); \
 499 static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
 500 { \
 501         return show_temp_hyst(dev, buf, num-1); \
 502 } \
 503 static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
 504                                         size_t count) \
 505 { \
 506         return set_temp_hyst(dev, buf, count, num-1); \
 507 } \
 508 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
 509                 show_temp_hyst##num, set_temp_hyst##num);
 510
 511 sysfs_temp(1);
 512 sysfs_temp(2);
 513 sysfs_temp(3);
 514 sysfs_temp(4);
 515
 516 /* VID */
 517 #define device_create_file_temp(client, num) do { \
 518         device_create_file(&client->dev, &dev_attr_temp##num##_input); \
 519         device_create_file(&client->dev, &dev_attr_temp##num##_max); \
 520         device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
 521 } while (0)
 522
 523 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 524 {
 525         struct asb100_data *data = asb100_update_device(dev);
 526         return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 527 }
 528
 529 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 530 #define device_create_file_vid(client) \
 531 device_create_file(&client->dev, &dev_attr_cpu0_vid)
 532
 533 /* VRM */
 534 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 535 {
 536         struct asb100_data *data = asb100_update_device(dev);
 537         return sprintf(buf, "%d\n", data->vrm);
 538 }
 539
 540 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 541 {
 542         struct i2c_client *client = to_i2c_client(dev);
 543         struct asb100_data *data = i2c_get_clientdata(client);
 544         unsigned long val = simple_strtoul(buf, NULL, 10);
 545         data->vrm = val;
 546         return count;
 547 }
 548
 549 /* Alarms */
 550 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
 551 #define device_create_file_vrm(client) \
 552 device_create_file(&client->dev, &dev_attr_vrm);
 553
 554 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 555 {
 556         struct asb100_data *data = asb100_update_device(dev);
 557         return sprintf(buf, "%u\n", data->alarms);
 558 }
 559
 560 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 561 #define device_create_file_alarms(client) \
 562 device_create_file(&client->dev, &dev_attr_alarms)
 563
 564 /* 1 PWM */
 565 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
 566 {
 567         struct asb100_data *data = asb100_update_device(dev);
 568         return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
 569 }
 570
 571 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 572 {
 573         struct i2c_client *client = to_i2c_client(dev);
 574         struct asb100_data *data = i2c_get_clientdata(client);
 575         unsigned long val = simple_strtoul(buf, NULL, 10);
 576
 577         down(&data->update_lock);
 578         data->pwm &= 0x80; /* keep the enable bit */
 579         data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
 580         asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
 581         up(&data->update_lock);
 582         return count;
 583 }
 584
 585 static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
 586 {
 587         struct asb100_data *data = asb100_update_device(dev);
 588         return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
 589 }
 590
 591 static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
 592                                 size_t count)
 593 {
 594         struct i2c_client *client = to_i2c_client(dev);
 595         struct asb100_data *data = i2c_get_clientdata(client);
 596         unsigned long val = simple_strtoul(buf, NULL, 10);
 597
 598         down(&data->update_lock);
 599         data->pwm &= 0x0f; /* keep the duty cycle bits */
 600         data->pwm |= (val ? 0x80 : 0x00);
 601         asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
 602         up(&data->update_lock);
 603         return count;
 604 }
 605
 606 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
 607 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 608                 show_pwm_enable1, set_pwm_enable1);
 609 #define device_create_file_pwm1(client) do { \
 610         device_create_file(&new_client->dev, &dev_attr_pwm1); \
 611         device_create_file(&new_client->dev, &dev_attr_pwm1_enable); \
 612 } while (0)
 613
 614 /* This function is called when:
 615         asb100_driver is inserted (when this module is loaded), for each
 616                 available adapter
 617         when a new adapter is inserted (and asb100_driver is still present)
 618  */
 619 static int asb100_attach_adapter(struct i2c_adapter *adapter)
 620 {
 621         if (!(adapter->class & I2C_CLASS_HWMON))
 622                 return 0;
 623         return i2c_probe(adapter, &addr_data, asb100_detect);
 624 }
 625
 626 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
 627                 int kind, struct i2c_client *new_client)
 628 {
 629         int i, id, err;
 630         struct asb100_data *data = i2c_get_clientdata(new_client);
 631
 632         data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 633         if (!(data->lm75[0])) {
 634                 err = -ENOMEM;
 635                 goto ERROR_SC_0;
 636         }
 637         memset(data->lm75[0], 0x00, sizeof(struct i2c_client));
 638
 639         data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 640         if (!(data->lm75[1])) {
 641                 err = -ENOMEM;
 642                 goto ERROR_SC_1;
 643         }
 644         memset(data->lm75[1], 0x00, sizeof(struct i2c_client));
 645
 646         id = i2c_adapter_id(adapter);
 647
 648         if (force_subclients[0] == id && force_subclients[1] == address) {
 649                 for (i = 2; i <= 3; i++) {
 650                         if (force_subclients[i] < 0x48 ||
 651                             force_subclients[i] > 0x4f) {
 652                                 dev_err(&new_client->dev, "invalid subclient "
 653                                         "address %d; must be 0x48-0x4f\n",
 654                                         force_subclients[i]);
 655                                 err = -ENODEV;
 656                                 goto ERROR_SC_2;
 657                         }
 658                 }
 659                 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
 660                                         (force_subclients[2] & 0x07) |
 661                                         ((force_subclients[3] & 0x07) <<4));
 662                 data->lm75[0]->addr = force_subclients[2];
 663                 data->lm75[1]->addr = force_subclients[3];
 664         } else {
 665                 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
 666                 data->lm75[0]->addr = 0x48 + (val & 0x07);
 667                 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
 668         }
 669
 670         if(data->lm75[0]->addr == data->lm75[1]->addr) {
 671                 dev_err(&new_client->dev, "duplicate addresses 0x%x "
 672                                 "for subclients\n", data->lm75[0]->addr);
 673                 err = -ENODEV;
 674                 goto ERROR_SC_2;
 675         }
 676
 677         for (i = 0; i <= 1; i++) {
 678                 i2c_set_clientdata(data->lm75[i], NULL);
 679                 data->lm75[i]->adapter = adapter;
 680                 data->lm75[i]->driver = &asb100_driver;
 681                 data->lm75[i]->flags = 0;
 682                 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
 683         }
 684
 685         if ((err = i2c_attach_client(data->lm75[0]))) {
 686                 dev_err(&new_client->dev, "subclient %d registration "
 687                         "at address 0x%x failed.\n", i, data->lm75[0]->addr);
 688                 goto ERROR_SC_2;
 689         }
 690
 691         if ((err = i2c_attach_client(data->lm75[1]))) {
 692                 dev_err(&new_client->dev, "subclient %d registration "
 693                         "at address 0x%x failed.\n", i, data->lm75[1]->addr);
 694                 goto ERROR_SC_3;
 695         }
 696
 697         return 0;
 698
 699 /* Undo inits in case of errors */
 700 ERROR_SC_3:
 701         i2c_detach_client(data->lm75[0]);
 702 ERROR_SC_2:
 703         kfree(data->lm75[1]);
 704 ERROR_SC_1:
 705         kfree(data->lm75[0]);
 706 ERROR_SC_0:
 707         return err;
 708 }
 709
 710 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
 711 {
 712         int err;
 713         struct i2c_client *new_client;
 714         struct asb100_data *data;
 715
 716         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 717                 pr_debug("asb100.o: detect failed, "
 718                                 "smbus byte data not supported!\n");
 719                 err = -ENODEV;
 720                 goto ERROR0;
 721         }
 722
 723         /* OK. For now, we presume we have a valid client. We now create the
 724            client structure, even though we cannot fill it completely yet.
 725            But it allows us to access asb100_{read,write}_value. */
 726
 727         if (!(data = kmalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
 728                 pr_debug("asb100.o: detect failed, kmalloc failed!\n");
 729                 err = -ENOMEM;
 730                 goto ERROR0;
 731         }
 732         memset(data, 0, sizeof(struct asb100_data));
 733
 734         new_client = &data->client;
 735         init_MUTEX(&data->lock);
 736         i2c_set_clientdata(new_client, data);
 737         new_client->addr = address;
 738         new_client->adapter = adapter;
 739         new_client->driver = &asb100_driver;
 740         new_client->flags = 0;
 741
 742         /* Now, we do the remaining detection. */
 743
 744         /* The chip may be stuck in some other bank than bank 0. This may
 745            make reading other information impossible. Specify a force=... or
 746            force_*=... parameter, and the chip will be reset to the right
 747            bank. */
 748         if (kind < 0) {
 749
 750                 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
 751                 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
 752
 753                 /* If we're in bank 0 */
 754                 if ( (!(val1 & 0x07)) &&
 755                                 /* Check for ASB100 ID (low byte) */
 756                                 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
 757                                 /* Check for ASB100 ID (high byte ) */
 758                                 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
 759                         pr_debug("asb100.o: detect failed, "
 760                                         "bad chip id 0x%02x!\n", val2);
 761                         err = -ENODEV;
 762                         goto ERROR1;
 763                 }
 764
 765         } /* kind < 0 */
 766
 767         /* We have either had a force parameter, or we have already detected
 768            Winbond. Put it now into bank 0 and Vendor ID High Byte */
 769         asb100_write_value(new_client, ASB100_REG_BANK,
 770                 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
 771
 772         /* Determine the chip type. */
 773         if (kind <= 0) {
 774                 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
 775                 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
 776
 777                 if ((val1 == 0x31) && (val2 == 0x06))
 778                         kind = asb100;
 779                 else {
 780                         if (kind == 0)
 781                                 dev_warn(&new_client->dev, "ignoring "
 782                                         "'force' parameter for unknown chip "
 783                                         "at adapter %d, address 0x%02x.\n",
 784                                         i2c_adapter_id(adapter), address);
 785                         err = -ENODEV;
 786                         goto ERROR1;
 787                 }
 788         }
 789
 790         /* Fill in remaining client fields and put it into the global list */
 791         strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
 792         data->type = kind;
 793
 794         data->valid = 0;
 795         init_MUTEX(&data->update_lock);
 796
 797         /* Tell the I2C layer a new client has arrived */
 798         if ((err = i2c_attach_client(new_client)))
 799                 goto ERROR1;
 800
 801         /* Attach secondary lm75 clients */
 802         if ((err = asb100_detect_subclients(adapter, address, kind,
 803                         new_client)))
 804                 goto ERROR2;
 805
 806         /* Initialize the chip */
 807         asb100_init_client(new_client);
 808
 809         /* A few vars need to be filled upon startup */
 810         data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
 811         data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
 812         data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
 813
 814         /* Register sysfs hooks */
 815         data->class_dev = hwmon_device_register(&new_client->dev);
 816         if (IS_ERR(data->class_dev)) {
 817                 err = PTR_ERR(data->class_dev);
 818                 goto ERROR3;
 819         }
 820
 821         device_create_file_in(new_client, 0);
 822         device_create_file_in(new_client, 1);
 823         device_create_file_in(new_client, 2);
 824         device_create_file_in(new_client, 3);
 825         device_create_file_in(new_client, 4);
 826         device_create_file_in(new_client, 5);
 827         device_create_file_in(new_client, 6);
 828
 829         device_create_file_fan(new_client, 1);
 830         device_create_file_fan(new_client, 2);
 831         device_create_file_fan(new_client, 3);
 832
 833         device_create_file_temp(new_client, 1);
 834         device_create_file_temp(new_client, 2);
 835         device_create_file_temp(new_client, 3);
 836         device_create_file_temp(new_client, 4);
 837
 838         device_create_file_vid(new_client);
 839         device_create_file_vrm(new_client);
 840
 841         device_create_file_alarms(new_client);
 842
 843         device_create_file_pwm1(new_client);
 844
 845         return 0;
 846
 847 ERROR3:
 848         i2c_detach_client(data->lm75[1]);
 849         i2c_detach_client(data->lm75[0]);
 850         kfree(data->lm75[1]);
 851         kfree(data->lm75[0]);
 852 ERROR2:
 853         i2c_detach_client(new_client);
 854 ERROR1:
 855         kfree(data);
 856 ERROR0:
 857         return err;
 858 }
 859
 860 static int asb100_detach_client(struct i2c_client *client)
 861 {
 862         struct asb100_data *data = i2c_get_clientdata(client);
 863         int err;
 864
 865         /* main client */
 866         if (data)
 867                 hwmon_device_unregister(data->class_dev);
 868
 869         if ((err = i2c_detach_client(client)))
 870                 return err;
 871
 872         /* main client */
 873         if (data)
 874                 kfree(data);
 875
 876         /* subclient */
 877         else
 878                 kfree(client);
 879
 880         return 0;
 881 }
 882
 883 /* The SMBus locks itself, usually, but nothing may access the chip between
 884    bank switches. */
 885 static int asb100_read_value(struct i2c_client *client, u16 reg)
 886 {
 887         struct asb100_data *data = i2c_get_clientdata(client);
 888         struct i2c_client *cl;
 889         int res, bank;
 890
 891         down(&data->lock);
 892
 893         bank = (reg >> 8) & 0x0f;
 894         if (bank > 2)
 895                 /* switch banks */
 896                 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
 897
 898         if (bank == 0 || bank > 2) {
 899                 res = i2c_smbus_read_byte_data(client, reg & 0xff);
 900         } else {
 901                 /* switch to subclient */
 902                 cl = data->lm75[bank - 1];
 903
 904                 /* convert from ISA to LM75 I2C addresses */
 905                 switch (reg & 0xff) {
 906                 case 0x50: /* TEMP */
 907                         res = swab16(i2c_smbus_read_word_data (cl, 0));
 908                         break;
 909                 case 0x52: /* CONFIG */
 910                         res = i2c_smbus_read_byte_data(cl, 1);
 911                         break;
 912                 case 0x53: /* HYST */
 913                         res = swab16(i2c_smbus_read_word_data (cl, 2));
 914                         break;
 915                 case 0x55: /* MAX */
 916                 default:
 917                         res = swab16(i2c_smbus_read_word_data (cl, 3));
 918                         break;
 919                 }
 920         }
 921
 922         if (bank > 2)
 923                 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
 924
 925         up(&data->lock);
 926
 927         return res;
 928 }
 929
 930 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
 931 {
 932         struct asb100_data *data = i2c_get_clientdata(client);
 933         struct i2c_client *cl;
 934         int bank;
 935
 936         down(&data->lock);
 937
 938         bank = (reg >> 8) & 0x0f;
 939         if (bank > 2)
 940                 /* switch banks */
 941                 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
 942
 943         if (bank == 0 || bank > 2) {
 944                 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
 945         } else {
 946                 /* switch to subclient */
 947                 cl = data->lm75[bank - 1];
 948
 949                 /* convert from ISA to LM75 I2C addresses */
 950                 switch (reg & 0xff) {
 951                 case 0x52: /* CONFIG */
 952                         i2c_smbus_write_byte_data(cl, 1, value & 0xff);
 953                         break;
 954                 case 0x53: /* HYST */
 955                         i2c_smbus_write_word_data(cl, 2, swab16(value));
 956                         break;
 957                 case 0x55: /* MAX */
 958                         i2c_smbus_write_word_data(cl, 3, swab16(value));
 959                         break;
 960                 }
 961         }
 962
 963         if (bank > 2)
 964                 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
 965
 966         up(&data->lock);
 967 }
 968
 969 static void asb100_init_client(struct i2c_client *client)
 970 {
 971         struct asb100_data *data = i2c_get_clientdata(client);
 972         int vid = 0;
 973
 974         vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
 975         vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
 976         data->vrm = vid_which_vrm();
 977         vid = vid_from_reg(vid, data->vrm);
 978
 979         /* Start monitoring */
 980         asb100_write_value(client, ASB100_REG_CONFIG,
 981                 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
 982 }
 983
 984 static struct asb100_data *asb100_update_device(struct device *dev)
 985 {
 986         struct i2c_client *client = to_i2c_client(dev);
 987         struct asb100_data *data = i2c_get_clientdata(client);
 988         int i;
 989
 990         down(&data->update_lock);
 991
 992         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 993                 || !data->valid) {
 994
 995                 dev_dbg(&client->dev, "starting device update...\n");
 996
 997                 /* 7 voltage inputs */
 998                 for (i = 0; i < 7; i++) {
 999                         data->in[i] = asb100_read_value(client,
1000                                 ASB100_REG_IN(i));
1001                         data->in_min[i] = asb100_read_value(client,
1002                                 ASB100_REG_IN_MIN(i));
1003                         data->in_max[i] = asb100_read_value(client,
1004                                 ASB100_REG_IN_MAX(i));
1005                 }
1006
1007                 /* 3 fan inputs */
1008                 for (i = 0; i < 3; i++) {
1009                         data->fan[i] = asb100_read_value(client,
1010                                         ASB100_REG_FAN(i));
1011                         data->fan_min[i] = asb100_read_value(client,
1012                                         ASB100_REG_FAN_MIN(i));
1013                 }
1014
1015                 /* 4 temperature inputs */
1016                 for (i = 1; i <= 4; i++) {
1017                         data->temp[i-1] = asb100_read_value(client,
1018                                         ASB100_REG_TEMP(i));
1019                         data->temp_max[i-1] = asb100_read_value(client,
1020                                         ASB100_REG_TEMP_MAX(i));
1021                         data->temp_hyst[i-1] = asb100_read_value(client,
1022                                         ASB100_REG_TEMP_HYST(i));
1023                 }
1024
1025                 /* VID and fan divisors */
1026                 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1027                 data->vid = i & 0x0f;
1028                 data->vid |= (asb100_read_value(client,
1029                                 ASB100_REG_CHIPID) & 0x01) << 4;
1030                 data->fan_div[0] = (i >> 4) & 0x03;
1031                 data->fan_div[1] = (i >> 6) & 0x03;
1032                 data->fan_div[2] = (asb100_read_value(client,
1033                                 ASB100_REG_PIN) >> 6) & 0x03;
1034
1035                 /* PWM */
1036                 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1037
1038                 /* alarms */
1039                 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1040                         (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1041
1042                 data->last_updated = jiffies;
1043                 data->valid = 1;
1044
1045                 dev_dbg(&client->dev, "... device update complete\n");
1046         }
1047
1048         up(&data->update_lock);
1049
1050         return data;
1051 }
1052
1053 static int __init asb100_init(void)
1054 {
1055         return i2c_add_driver(&asb100_driver);
1056 }
1057
1058 static void __exit asb100_exit(void)
1059 {
1060         i2c_del_driver(&asb100_driver);
1061 }
1062
1063 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1064 MODULE_DESCRIPTION("ASB100 Bach driver");
1065 MODULE_LICENSE("GPL");
1066
1067 module_init(asb100_init);
1068 module_exit(asb100_exit);
1069