// SPDX-License-Identifier: GPL-2.0-or-later
/*
* abituguru.c Copyright (c) 2005-2006 Hans de Goede <hdegoede@redhat.com>
*/
/*
* This driver supports the sensor part of the first and second revision of
* the custom Abit uGuru chip found on Abit uGuru motherboards. Note: because
* of lack of specs the CPU/RAM voltage & frequency control is not supported!
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/dmi.h>
#include <linux/io.h>
/* Banks */
#define ABIT_UGURU_ALARM_BANK 0x20 /* 1x 3 bytes */
#define ABIT_UGURU_SENSOR_BANK1 0x21 /* 16x volt and temp */
#define ABIT_UGURU_FAN_PWM 0x24 /* 3x 5 bytes */
#define ABIT_UGURU_SENSOR_BANK2 0x26 /* fans */
/* max nr of sensors in bank1, a bank1 sensor can be in, temp or nc */
#define ABIT_UGURU_MAX_BANK1_SENSORS 16
/*
* Warning if you increase one of the 2 MAX defines below to 10 or higher you
* should adjust the belonging _NAMES_LENGTH macro for the 2 digit number!
*/
/* max nr of sensors in bank2, currently mb's with max 6 fans are known */
#define ABIT_UGURU_MAX_BANK2_SENSORS 6
/* max nr of pwm outputs, currently mb's with max 5 pwm outputs are known */
#define ABIT_UGURU_MAX_PWMS 5
/* uGuru sensor bank 1 flags */ /* Alarm if: */
#define ABIT_UGURU_TEMP_HIGH_ALARM_ENABLE 0x01 /* temp over warn */
#define ABIT_UGURU_VOLT_HIGH_ALARM_ENABLE 0x02 /* volt over max */
#define ABIT_UGURU_VOLT_LOW_ALARM_ENABLE 0x04 /* volt under min */
#define ABIT_UGURU_TEMP_HIGH_ALARM_FLAG 0x10 /* temp is over warn */
#define ABIT_UGURU_VOLT_HIGH_ALARM_FLAG 0x20 /* volt is over max */
#define ABIT_UGURU_VOLT_LOW_ALARM_FLAG 0x40 /* volt is under min */
/* uGuru sensor bank 2 flags */ /* Alarm if: */
#define ABIT_UGURU_FAN_LOW_ALARM_ENABLE 0x01 /* fan under min */
/* uGuru sensor bank common flags */
#define ABIT_UGURU_BEEP_ENABLE 0x08 /* beep if alarm */
#define ABIT_UGURU_SHUTDOWN_ENABLE 0x80 /* shutdown if alarm */
/* uGuru fan PWM (speed control) flags */
#define ABIT_UGURU_FAN_PWM_ENABLE 0x80 /* enable speed control */
/* Values used for conversion */
#define ABIT_UGURU_FAN_MAX 15300 /* RPM */
/* Bank1 sensor types */
#define ABIT_UGURU_IN_SENSOR 0
#define ABIT_UGURU_TEMP_SENSOR 1
#define ABIT_UGURU_NC 2
/*
* In many cases we need to wait for the uGuru to reach a certain status, most
* of the time it will reach this status within 30 - 90 ISA reads, and thus we
* can best busy wait. This define gives the total amount of reads to try.
*/
#define ABIT_UGURU_WAIT_TIMEOUT 125
/*
* However sometimes older versions of the uGuru seem to be distracted and they
* do not respond for a long time. To handle this we sleep before each of the
* last ABIT_UGURU_WAIT_TIMEOUT_SLEEP tries.
*/
#define ABIT_UGURU_WAIT_TIMEOUT_SLEEP 5
/*
* Normally all expected status in abituguru_ready, are reported after the
* first read, but sometimes not and we need to poll.
*/
#define ABIT_UGURU_READY_TIMEOUT 5
/* Maximum 3 retries on timedout reads/writes, delay 200 ms before retrying */
#define ABIT_UGURU_MAX_RETRIES 3
#define ABIT_UGURU_RETRY_DELAY (HZ/5)
/* Maximum 2 timeouts in abituguru_update_device, iow 3 in a row is an error */
#define ABIT_UGURU_MAX_TIMEOUTS 2
/* utility macros */
#define ABIT_UGURU_NAME "abitu
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