1009 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * asb100.c - Part of lm_sensors, Linux kernel modules for hardware4 * monitoring5 *6 * Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>7 *8 * (derived from w83781d.c)9 *10 * Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,11 * Philip Edelbrock <phil@netroedge.com>, and12 * Mark Studebaker <mdsxyz123@yahoo.com>13 */14 15/*16 * This driver supports the hardware sensor chips: Asus ASB100 and17 * ASB100-A "BACH".18 *19 * ASB100-A supports pwm1, while plain ASB100 does not. There is no known20 * way for the driver to tell which one is there.21 *22 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA23 * asb100 7 3 1 4 0x31 0x0694 yes no24 */25 26#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt27 28#include <linux/module.h>29#include <linux/slab.h>30#include <linux/i2c.h>31#include <linux/hwmon.h>32#include <linux/hwmon-sysfs.h>33#include <linux/hwmon-vid.h>34#include <linux/err.h>35#include <linux/init.h>36#include <linux/jiffies.h>37#include <linux/mutex.h>38#include "lm75.h"39 40/* I2C addresses to scan */41static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };42 43static unsigned short force_subclients[4];44module_param_array(force_subclients, short, NULL, 0);45MODULE_PARM_DESC(force_subclients,46 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");47 48/* Voltage IN registers 0-6 */49#define ASB100_REG_IN(nr) (0x20 + (nr))50#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))51#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))52 53/* FAN IN registers 1-3 */54#define ASB100_REG_FAN(nr) (0x28 + (nr))55#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))56 57/* TEMPERATURE registers 1-4 */58static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};59static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};60static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};61 62#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])63#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])64#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])65 66#define ASB100_REG_TEMP2_CONFIG 0x015267#define ASB100_REG_TEMP3_CONFIG 0x025268 69 70#define ASB100_REG_CONFIG 0x4071#define ASB100_REG_ALARM1 0x4172#define ASB100_REG_ALARM2 0x4273#define ASB100_REG_SMIM1 0x4374#define ASB100_REG_SMIM2 0x4475#define ASB100_REG_VID_FANDIV 0x4776#define ASB100_REG_I2C_ADDR 0x4877#define ASB100_REG_CHIPID 0x4978#define ASB100_REG_I2C_SUBADDR 0x4a79#define ASB100_REG_PIN 0x4b80#define ASB100_REG_IRQ 0x4c81#define ASB100_REG_BANK 0x4e82#define ASB100_REG_CHIPMAN 0x4f83 84#define ASB100_REG_WCHIPID 0x5885 86/* bit 7 -> enable, bits 0-3 -> duty cycle */87#define ASB100_REG_PWM1 0x5988 89/*90 * CONVERSIONS91 * Rounding and limit checking is only done on the TO_REG variants.92 */93 94/* These constants are a guess, consistent w/ w83781d */95#define ASB100_IN_MIN 096#define ASB100_IN_MAX 408097 98/*99 * IN: 1/1000 V (0V to 4.08V)100 * REG: 16mV/bit101 */102static u8 IN_TO_REG(unsigned val)103{104 unsigned nval = clamp_val(val, ASB100_IN_MIN, ASB100_IN_MAX);105 return (nval + 8) / 16;106}107 108static unsigned IN_FROM_REG(u8 reg)109{110 return reg * 16;111}112 113static u8 FAN_TO_REG(long rpm, int div)114{115 if (rpm == -1)116 return 0;117 if (rpm == 0)118 return 255;119 rpm = clamp_val(rpm, 1, 1000000);120 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);121}122 123static int FAN_FROM_REG(u8 val, int div)124{125 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);126}127 128/* These constants are a guess, consistent w/ w83781d */129#define ASB100_TEMP_MIN -128000130#define ASB100_TEMP_MAX 127000131 132/*133 * TEMP: 0.001C/bit (-128C to +127C)134 * REG: 1C/bit, two's complement135 */136static u8 TEMP_TO_REG(long temp)137{138 int ntemp = clamp_val(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);139 ntemp += (ntemp < 0 ? -500 : 500);140 return (u8)(ntemp / 1000);141}142 143static int TEMP_FROM_REG(u8 reg)144{145 return (s8)reg * 1000;146}147 148/*149 * PWM: 0 - 255 per sensors documentation150 * REG: (6.25% duty cycle per bit)151 */152static u8 ASB100_PWM_TO_REG(int pwm)153{154 pwm = clamp_val(pwm, 0, 255);155 return (u8)(pwm / 16);156}157 158static int ASB100_PWM_FROM_REG(u8 reg)159{160 return reg * 16;161}162 163#define DIV_FROM_REG(val) (1 << (val))164 165/*166 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)167 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)168 */169static u8 DIV_TO_REG(long val)170{171 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;172}173 174/*175 * For each registered client, we need to keep some data in memory. That176 * data is pointed to by client->data. The structure itself is177 * dynamically allocated, at the same time the client itself is allocated.178 */179struct asb100_data {180 struct device *hwmon_dev;181 struct mutex lock;182 183 struct mutex update_lock;184 unsigned long last_updated; /* In jiffies */185 186 /* array of 2 pointers to subclients */187 struct i2c_client *lm75[2];188 189 bool valid; /* true if following fields are valid */190 u8 in[7]; /* Register value */191 u8 in_max[7]; /* Register value */192 u8 in_min[7]; /* Register value */193 u8 fan[3]; /* Register value */194 u8 fan_min[3]; /* Register value */195 u16 temp[4]; /* Register value (0 and 3 are u8 only) */196 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */197 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */198 u8 fan_div[3]; /* Register encoding, right justified */199 u8 pwm; /* Register encoding */200 u8 vid; /* Register encoding, combined */201 u32 alarms; /* Register encoding, combined */202 u8 vrm;203};204 205static int asb100_read_value(struct i2c_client *client, u16 reg);206static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);207 208static int asb100_probe(struct i2c_client *client);209static int asb100_detect(struct i2c_client *client,210 struct i2c_board_info *info);211static void asb100_remove(struct i2c_client *client);212static struct asb100_data *asb100_update_device(struct device *dev);213static void asb100_init_client(struct i2c_client *client);214 215static const struct i2c_device_id asb100_id[] = {216 { "asb100" },217 { }218};219MODULE_DEVICE_TABLE(i2c, asb100_id);220 221static struct i2c_driver asb100_driver = {222 .class = I2C_CLASS_HWMON,223 .driver = {224 .name = "asb100",225 },226 .probe = asb100_probe,227 .remove = asb100_remove,228 .id_table = asb100_id,229 .detect = asb100_detect,230 .address_list = normal_i2c,231};232 233/* 7 Voltages */234#define show_in_reg(reg) \235static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \236 char *buf) \237{ \238 int nr = to_sensor_dev_attr(attr)->index; \239 struct asb100_data *data = asb100_update_device(dev); \240 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \241}242 243show_in_reg(in)244show_in_reg(in_min)245show_in_reg(in_max)246 247#define set_in_reg(REG, reg) \248static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \249 const char *buf, size_t count) \250{ \251 int nr = to_sensor_dev_attr(attr)->index; \252 struct i2c_client *client = to_i2c_client(dev); \253 struct asb100_data *data = i2c_get_clientdata(client); \254 unsigned long val; \255 int err = kstrtoul(buf, 10, &val); \256 if (err) \257 return err; \258 mutex_lock(&data->update_lock); \259 data->in_##reg[nr] = IN_TO_REG(val); \260 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \261 data->in_##reg[nr]); \262 mutex_unlock(&data->update_lock); \263 return count; \264}265 266set_in_reg(MIN, min)267set_in_reg(MAX, max)268 269#define sysfs_in(offset) \270static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \271 show_in, NULL, offset); \272static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \273 show_in_min, set_in_min, offset); \274static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \275 show_in_max, set_in_max, offset)276 277sysfs_in(0);278sysfs_in(1);279sysfs_in(2);280sysfs_in(3);281sysfs_in(4);282sysfs_in(5);283sysfs_in(6);284 285/* 3 Fans */286static ssize_t show_fan(struct device *dev, struct device_attribute *attr,287 char *buf)288{289 int nr = to_sensor_dev_attr(attr)->index;290 struct asb100_data *data = asb100_update_device(dev);291 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],292 DIV_FROM_REG(data->fan_div[nr])));293}294 295static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,296 char *buf)297{298 int nr = to_sensor_dev_attr(attr)->index;299 struct asb100_data *data = asb100_update_device(dev);300 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],301 DIV_FROM_REG(data->fan_div[nr])));302}303 304static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,305 char *buf)306{307 int nr = to_sensor_dev_attr(attr)->index;308 struct asb100_data *data = asb100_update_device(dev);309 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));310}311 312static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,313 const char *buf, size_t count)314{315 int nr = to_sensor_dev_attr(attr)->index;316 struct i2c_client *client = to_i2c_client(dev);317 struct asb100_data *data = i2c_get_clientdata(client);318 unsigned long val;319 int err;320 321 err = kstrtoul(buf, 10, &val);322 if (err)323 return err;324 325 mutex_lock(&data->update_lock);326 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));327 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);328 mutex_unlock(&data->update_lock);329 return count;330}331 332/*333 * Note: we save and restore the fan minimum here, because its value is334 * determined in part by the fan divisor. This follows the principle of335 * least surprise; the user doesn't expect the fan minimum to change just336 * because the divisor changed.337 */338static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,339 const char *buf, size_t count)340{341 int nr = to_sensor_dev_attr(attr)->index;342 struct i2c_client *client = to_i2c_client(dev);343 struct asb100_data *data = i2c_get_clientdata(client);344 unsigned long min;345 int reg;346 unsigned long val;347 int err;348 349 err = kstrtoul(buf, 10, &val);350 if (err)351 return err;352 353 mutex_lock(&data->update_lock);354 355 min = FAN_FROM_REG(data->fan_min[nr],356 DIV_FROM_REG(data->fan_div[nr]));357 data->fan_div[nr] = DIV_TO_REG(val);358 359 switch (nr) {360 case 0: /* fan 1 */361 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);362 reg = (reg & 0xcf) | (data->fan_div[0] << 4);363 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);364 break;365 366 case 1: /* fan 2 */367 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);368 reg = (reg & 0x3f) | (data->fan_div[1] << 6);369 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);370 break;371 372 case 2: /* fan 3 */373 reg = asb100_read_value(client, ASB100_REG_PIN);374 reg = (reg & 0x3f) | (data->fan_div[2] << 6);375 asb100_write_value(client, ASB100_REG_PIN, reg);376 break;377 }378 379 data->fan_min[nr] =380 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));381 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);382 383 mutex_unlock(&data->update_lock);384 385 return count;386}387 388#define sysfs_fan(offset) \389static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \390 show_fan, NULL, offset - 1); \391static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \392 show_fan_min, set_fan_min, offset - 1); \393static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \394 show_fan_div, set_fan_div, offset - 1)395 396sysfs_fan(1);397sysfs_fan(2);398sysfs_fan(3);399 400/* 4 Temp. Sensors */401static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)402{403 int ret = 0;404 405 switch (nr) {406 case 1: case 2:407 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));408 break;409 case 0: case 3: default:410 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));411 break;412 }413 return ret;414}415 416#define show_temp_reg(reg) \417static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \418 char *buf) \419{ \420 int nr = to_sensor_dev_attr(attr)->index; \421 struct asb100_data *data = asb100_update_device(dev); \422 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \423}424 425show_temp_reg(temp);426show_temp_reg(temp_max);427show_temp_reg(temp_hyst);428 429#define set_temp_reg(REG, reg) \430static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \431 const char *buf, size_t count) \432{ \433 int nr = to_sensor_dev_attr(attr)->index; \434 struct i2c_client *client = to_i2c_client(dev); \435 struct asb100_data *data = i2c_get_clientdata(client); \436 long val; \437 int err = kstrtol(buf, 10, &val); \438 if (err) \439 return err; \440 mutex_lock(&data->update_lock); \441 switch (nr) { \442 case 1: case 2: \443 data->reg[nr] = LM75_TEMP_TO_REG(val); \444 break; \445 case 0: case 3: default: \446 data->reg[nr] = TEMP_TO_REG(val); \447 break; \448 } \449 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \450 data->reg[nr]); \451 mutex_unlock(&data->update_lock); \452 return count; \453}454 455set_temp_reg(MAX, temp_max);456set_temp_reg(HYST, temp_hyst);457 458#define sysfs_temp(num) \459static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \460 show_temp, NULL, num - 1); \461static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \462 show_temp_max, set_temp_max, num - 1); \463static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \464 show_temp_hyst, set_temp_hyst, num - 1)465 466sysfs_temp(1);467sysfs_temp(2);468sysfs_temp(3);469sysfs_temp(4);470 471/* VID */472static ssize_t cpu0_vid_show(struct device *dev,473 struct device_attribute *attr, char *buf)474{475 struct asb100_data *data = asb100_update_device(dev);476 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));477}478 479static DEVICE_ATTR_RO(cpu0_vid);480 481/* VRM */482static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,483 char *buf)484{485 struct asb100_data *data = dev_get_drvdata(dev);486 return sprintf(buf, "%d\n", data->vrm);487}488 489static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,490 const char *buf, size_t count)491{492 struct asb100_data *data = dev_get_drvdata(dev);493 unsigned long val;494 int err;495 496 err = kstrtoul(buf, 10, &val);497 if (err)498 return err;499 500 if (val > 255)501 return -EINVAL;502 503 data->vrm = val;504 return count;505}506 507/* Alarms */508static DEVICE_ATTR_RW(vrm);509 510static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,511 char *buf)512{513 struct asb100_data *data = asb100_update_device(dev);514 return sprintf(buf, "%u\n", data->alarms);515}516 517static DEVICE_ATTR_RO(alarms);518 519static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,520 char *buf)521{522 int bitnr = to_sensor_dev_attr(attr)->index;523 struct asb100_data *data = asb100_update_device(dev);524 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);525}526static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);527static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);528static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);529static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);530static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);531static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);532static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);533static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);534static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);535static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);536static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);537 538/* 1 PWM */539static ssize_t pwm1_show(struct device *dev, struct device_attribute *attr,540 char *buf)541{542 struct asb100_data *data = asb100_update_device(dev);543 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));544}545 546static ssize_t pwm1_store(struct device *dev, struct device_attribute *attr,547 const char *buf, size_t count)548{549 struct i2c_client *client = to_i2c_client(dev);550 struct asb100_data *data = i2c_get_clientdata(client);551 unsigned long val;552 int err;553 554 err = kstrtoul(buf, 10, &val);555 if (err)556 return err;557 558 mutex_lock(&data->update_lock);559 data->pwm &= 0x80; /* keep the enable bit */560 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));561 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);562 mutex_unlock(&data->update_lock);563 return count;564}565 566static ssize_t pwm1_enable_show(struct device *dev,567 struct device_attribute *attr, char *buf)568{569 struct asb100_data *data = asb100_update_device(dev);570 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);571}572 573static ssize_t pwm1_enable_store(struct device *dev,574 struct device_attribute *attr,575 const char *buf, size_t count)576{577 struct i2c_client *client = to_i2c_client(dev);578 struct asb100_data *data = i2c_get_clientdata(client);579 unsigned long val;580 int err;581 582 err = kstrtoul(buf, 10, &val);583 if (err)584 return err;585 586 mutex_lock(&data->update_lock);587 data->pwm &= 0x0f; /* keep the duty cycle bits */588 data->pwm |= (val ? 0x80 : 0x00);589 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);590 mutex_unlock(&data->update_lock);591 return count;592}593 594static DEVICE_ATTR_RW(pwm1);595static DEVICE_ATTR_RW(pwm1_enable);596 597static struct attribute *asb100_attributes[] = {598 &sensor_dev_attr_in0_input.dev_attr.attr,599 &sensor_dev_attr_in0_min.dev_attr.attr,600 &sensor_dev_attr_in0_max.dev_attr.attr,601 &sensor_dev_attr_in1_input.dev_attr.attr,602 &sensor_dev_attr_in1_min.dev_attr.attr,603 &sensor_dev_attr_in1_max.dev_attr.attr,604 &sensor_dev_attr_in2_input.dev_attr.attr,605 &sensor_dev_attr_in2_min.dev_attr.attr,606 &sensor_dev_attr_in2_max.dev_attr.attr,607 &sensor_dev_attr_in3_input.dev_attr.attr,608 &sensor_dev_attr_in3_min.dev_attr.attr,609 &sensor_dev_attr_in3_max.dev_attr.attr,610 &sensor_dev_attr_in4_input.dev_attr.attr,611 &sensor_dev_attr_in4_min.dev_attr.attr,612 &sensor_dev_attr_in4_max.dev_attr.attr,613 &sensor_dev_attr_in5_input.dev_attr.attr,614 &sensor_dev_attr_in5_min.dev_attr.attr,615 &sensor_dev_attr_in5_max.dev_attr.attr,616 &sensor_dev_attr_in6_input.dev_attr.attr,617 &sensor_dev_attr_in6_min.dev_attr.attr,618 &sensor_dev_attr_in6_max.dev_attr.attr,619 620 &sensor_dev_attr_fan1_input.dev_attr.attr,621 &sensor_dev_attr_fan1_min.dev_attr.attr,622 &sensor_dev_attr_fan1_div.dev_attr.attr,623 &sensor_dev_attr_fan2_input.dev_attr.attr,624 &sensor_dev_attr_fan2_min.dev_attr.attr,625 &sensor_dev_attr_fan2_div.dev_attr.attr,626 &sensor_dev_attr_fan3_input.dev_attr.attr,627 &sensor_dev_attr_fan3_min.dev_attr.attr,628 &sensor_dev_attr_fan3_div.dev_attr.attr,629 630 &sensor_dev_attr_temp1_input.dev_attr.attr,631 &sensor_dev_attr_temp1_max.dev_attr.attr,632 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,633 &sensor_dev_attr_temp2_input.dev_attr.attr,634 &sensor_dev_attr_temp2_max.dev_attr.attr,635 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,636 &sensor_dev_attr_temp3_input.dev_attr.attr,637 &sensor_dev_attr_temp3_max.dev_attr.attr,638 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,639 &sensor_dev_attr_temp4_input.dev_attr.attr,640 &sensor_dev_attr_temp4_max.dev_attr.attr,641 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,642 643 &sensor_dev_attr_in0_alarm.dev_attr.attr,644 &sensor_dev_attr_in1_alarm.dev_attr.attr,645 &sensor_dev_attr_in2_alarm.dev_attr.attr,646 &sensor_dev_attr_in3_alarm.dev_attr.attr,647 &sensor_dev_attr_in4_alarm.dev_attr.attr,648 &sensor_dev_attr_fan1_alarm.dev_attr.attr,649 &sensor_dev_attr_fan2_alarm.dev_attr.attr,650 &sensor_dev_attr_fan3_alarm.dev_attr.attr,651 &sensor_dev_attr_temp1_alarm.dev_attr.attr,652 &sensor_dev_attr_temp2_alarm.dev_attr.attr,653 &sensor_dev_attr_temp3_alarm.dev_attr.attr,654 655 &dev_attr_cpu0_vid.attr,656 &dev_attr_vrm.attr,657 &dev_attr_alarms.attr,658 &dev_attr_pwm1.attr,659 &dev_attr_pwm1_enable.attr,660 661 NULL662};663 664static const struct attribute_group asb100_group = {665 .attrs = asb100_attributes,666};667 668static int asb100_detect_subclients(struct i2c_client *client)669{670 int i, id, err;671 int address = client->addr;672 unsigned short sc_addr[2];673 struct asb100_data *data = i2c_get_clientdata(client);674 struct i2c_adapter *adapter = client->adapter;675 676 id = i2c_adapter_id(adapter);677 678 if (force_subclients[0] == id && force_subclients[1] == address) {679 for (i = 2; i <= 3; i++) {680 if (force_subclients[i] < 0x48 ||681 force_subclients[i] > 0x4f) {682 dev_err(&client->dev,683 "invalid subclient address %d; must be 0x48-0x4f\n",684 force_subclients[i]);685 err = -ENODEV;686 goto ERROR_SC_2;687 }688 }689 asb100_write_value(client, ASB100_REG_I2C_SUBADDR,690 (force_subclients[2] & 0x07) |691 ((force_subclients[3] & 0x07) << 4));692 sc_addr[0] = force_subclients[2];693 sc_addr[1] = force_subclients[3];694 } else {695 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);696 sc_addr[0] = 0x48 + (val & 0x07);697 sc_addr[1] = 0x48 + ((val >> 4) & 0x07);698 }699 700 if (sc_addr[0] == sc_addr[1]) {701 dev_err(&client->dev,702 "duplicate addresses 0x%x for subclients\n",703 sc_addr[0]);704 err = -ENODEV;705 goto ERROR_SC_2;706 }707 708 data->lm75[0] = i2c_new_dummy_device(adapter, sc_addr[0]);709 if (IS_ERR(data->lm75[0])) {710 dev_err(&client->dev,711 "subclient %d registration at address 0x%x failed.\n",712 1, sc_addr[0]);713 err = PTR_ERR(data->lm75[0]);714 goto ERROR_SC_2;715 }716 717 data->lm75[1] = i2c_new_dummy_device(adapter, sc_addr[1]);718 if (IS_ERR(data->lm75[1])) {719 dev_err(&client->dev,720 "subclient %d registration at address 0x%x failed.\n",721 2, sc_addr[1]);722 err = PTR_ERR(data->lm75[1]);723 goto ERROR_SC_3;724 }725 726 return 0;727 728/* Undo inits in case of errors */729ERROR_SC_3:730 i2c_unregister_device(data->lm75[0]);731ERROR_SC_2:732 return err;733}734 735/* Return 0 if detection is successful, -ENODEV otherwise */736static int asb100_detect(struct i2c_client *client,737 struct i2c_board_info *info)738{739 struct i2c_adapter *adapter = client->adapter;740 int val1, val2;741 742 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {743 pr_debug("detect failed, smbus byte data not supported!\n");744 return -ENODEV;745 }746 747 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK);748 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);749 750 /* If we're in bank 0 */751 if ((!(val1 & 0x07)) &&752 /* Check for ASB100 ID (low byte) */753 (((!(val1 & 0x80)) && (val2 != 0x94)) ||754 /* Check for ASB100 ID (high byte ) */755 ((val1 & 0x80) && (val2 != 0x06)))) {756 pr_debug("detect failed, bad chip id 0x%02x!\n", val2);757 return -ENODEV;758 }759 760 /* Put it now into bank 0 and Vendor ID High Byte */761 i2c_smbus_write_byte_data(client, ASB100_REG_BANK,762 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78)763 | 0x80);764 765 /* Determine the chip type. */766 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID);767 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);768 769 if (val1 != 0x31 || val2 != 0x06)770 return -ENODEV;771 772 strscpy(info->type, "asb100", I2C_NAME_SIZE);773 774 return 0;775}776 777static int asb100_probe(struct i2c_client *client)778{779 int err;780 struct asb100_data *data;781 782 data = devm_kzalloc(&client->dev, sizeof(struct asb100_data),783 GFP_KERNEL);784 if (!data)785 return -ENOMEM;786 787 i2c_set_clientdata(client, data);788 mutex_init(&data->lock);789 mutex_init(&data->update_lock);790 791 /* Attach secondary lm75 clients */792 err = asb100_detect_subclients(client);793 if (err)794 return err;795 796 /* Initialize the chip */797 asb100_init_client(client);798 799 /* A few vars need to be filled upon startup */800 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0));801 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1));802 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2));803 804 /* Register sysfs hooks */805 err = sysfs_create_group(&client->dev.kobj, &asb100_group);806 if (err)807 goto ERROR3;808 809 data->hwmon_dev = hwmon_device_register(&client->dev);810 if (IS_ERR(data->hwmon_dev)) {811 err = PTR_ERR(data->hwmon_dev);812 goto ERROR4;813 }814 815 return 0;816 817ERROR4:818 sysfs_remove_group(&client->dev.kobj, &asb100_group);819ERROR3:820 i2c_unregister_device(data->lm75[1]);821 i2c_unregister_device(data->lm75[0]);822 return err;823}824 825static void asb100_remove(struct i2c_client *client)826{827 struct asb100_data *data = i2c_get_clientdata(client);828 829 hwmon_device_unregister(data->hwmon_dev);830 sysfs_remove_group(&client->dev.kobj, &asb100_group);831 832 i2c_unregister_device(data->lm75[1]);833 i2c_unregister_device(data->lm75[0]);834}835 836/*837 * The SMBus locks itself, usually, but nothing may access the chip between838 * bank switches.839 */840static int asb100_read_value(struct i2c_client *client, u16 reg)841{842 struct asb100_data *data = i2c_get_clientdata(client);843 struct i2c_client *cl;844 int res, bank;845 846 mutex_lock(&data->lock);847 848 bank = (reg >> 8) & 0x0f;849 if (bank > 2)850 /* switch banks */851 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);852 853 if (bank == 0 || bank > 2) {854 res = i2c_smbus_read_byte_data(client, reg & 0xff);855 } else {856 /* switch to subclient */857 cl = data->lm75[bank - 1];858 859 /* convert from ISA to LM75 I2C addresses */860 switch (reg & 0xff) {861 case 0x50: /* TEMP */862 res = i2c_smbus_read_word_swapped(cl, 0);863 break;864 case 0x52: /* CONFIG */865 res = i2c_smbus_read_byte_data(cl, 1);866 break;867 case 0x53: /* HYST */868 res = i2c_smbus_read_word_swapped(cl, 2);869 break;870 case 0x55: /* MAX */871 default:872 res = i2c_smbus_read_word_swapped(cl, 3);873 break;874 }875 }876 877 if (bank > 2)878 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);879 880 mutex_unlock(&data->lock);881 882 return res;883}884 885static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)886{887 struct asb100_data *data = i2c_get_clientdata(client);888 struct i2c_client *cl;889 int bank;890 891 mutex_lock(&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 i2c_smbus_write_byte_data(client, reg & 0xff, value & 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 0x52: /* CONFIG */907 i2c_smbus_write_byte_data(cl, 1, value & 0xff);908 break;909 case 0x53: /* HYST */910 i2c_smbus_write_word_swapped(cl, 2, value);911 break;912 case 0x55: /* MAX */913 i2c_smbus_write_word_swapped(cl, 3, value);914 break;915 }916 }917 918 if (bank > 2)919 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);920 921 mutex_unlock(&data->lock);922}923 924static void asb100_init_client(struct i2c_client *client)925{926 struct asb100_data *data = i2c_get_clientdata(client);927 928 data->vrm = vid_which_vrm();929 930 /* Start monitoring */931 asb100_write_value(client, ASB100_REG_CONFIG,932 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);933}934 935static struct asb100_data *asb100_update_device(struct device *dev)936{937 struct i2c_client *client = to_i2c_client(dev);938 struct asb100_data *data = i2c_get_clientdata(client);939 int i;940 941 mutex_lock(&data->update_lock);942 943 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)944 || !data->valid) {945 946 dev_dbg(&client->dev, "starting device update...\n");947 948 /* 7 voltage inputs */949 for (i = 0; i < 7; i++) {950 data->in[i] = asb100_read_value(client,951 ASB100_REG_IN(i));952 data->in_min[i] = asb100_read_value(client,953 ASB100_REG_IN_MIN(i));954 data->in_max[i] = asb100_read_value(client,955 ASB100_REG_IN_MAX(i));956 }957 958 /* 3 fan inputs */959 for (i = 0; i < 3; i++) {960 data->fan[i] = asb100_read_value(client,961 ASB100_REG_FAN(i));962 data->fan_min[i] = asb100_read_value(client,963 ASB100_REG_FAN_MIN(i));964 }965 966 /* 4 temperature inputs */967 for (i = 1; i <= 4; i++) {968 data->temp[i-1] = asb100_read_value(client,969 ASB100_REG_TEMP(i));970 data->temp_max[i-1] = asb100_read_value(client,971 ASB100_REG_TEMP_MAX(i));972 data->temp_hyst[i-1] = asb100_read_value(client,973 ASB100_REG_TEMP_HYST(i));974 }975 976 /* VID and fan divisors */977 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);978 data->vid = i & 0x0f;979 data->vid |= (asb100_read_value(client,980 ASB100_REG_CHIPID) & 0x01) << 4;981 data->fan_div[0] = (i >> 4) & 0x03;982 data->fan_div[1] = (i >> 6) & 0x03;983 data->fan_div[2] = (asb100_read_value(client,984 ASB100_REG_PIN) >> 6) & 0x03;985 986 /* PWM */987 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);988 989 /* alarms */990 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +991 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);992 993 data->last_updated = jiffies;994 data->valid = true;995 996 dev_dbg(&client->dev, "... device update complete\n");997 }998 999 mutex_unlock(&data->update_lock);1000 1001 return data;1002}1003 1004module_i2c_driver(asb100_driver);1005 1006MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");1007MODULE_DESCRIPTION("ASB100 Bach driver");1008MODULE_LICENSE("GPL");1009