linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * f71805f.c - driver for the Fintek F71805F/FG and F71872F/FG Super-I/O

 *             chips integrated hardware monitoring features

 * Copyright (C) 2005-2006  Jean Delvare <jdelvare@suse.de>

 *

 * The F71805F/FG is a LPC Super-I/O chip made by Fintek. It integrates

 * complete hardware monitoring features: voltage, fan and temperature

 * sensors, and manual and automatic fan speed control.

 *

 * The F71872F/FG is almost the same, with two more voltages monitored,

 * and 6 VID inputs.

 *

 * The F71806F/FG is essentially the same as the F71872F/FG. It even has

 * the same chip ID, so the driver can't differentiate between.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/platform_device.h>

#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/sysfs.h>

#include <linux/ioport.h>

#include <linux/acpi.h>

#include <linux/io.h>

​

static unsigned short force_id;

module_param(force_id, ushort, 0);

MODULE_PARM_DESC(force_id, "Override the detected device ID");

​

static struct platform_device *pdev;

​

#define DRVNAME "f71805f"

enum kinds { f71805f, f71872f };

​

/*

 * Super-I/O constants and functions

 */

​

#define F71805F_LD_HWM      0x04

​

#define SIO_REG_LDSEL       0x07    /* Logical device select */

#define SIO_REG_DEVID       0x20    /* Device ID (2 bytes) */

#define SIO_REG_DEVREV      0x22    /* Device revision */

#define SIO_REG_MANID       0x23    /* Fintek ID (2 bytes) */

#define SIO_REG_FNSEL1      0x29    /* Multi Function Select 1 (F71872F) */

#define SIO_REG_ENABLE      0x30    /* Logical device enable */

#define SIO_REG_ADDR        0x60    /* Logical device address (2 bytes) */

​

#define SIO_FINTEK_ID       0x1934

#define SIO_F71805F_ID      0x0406

#define SIO_F71872F_ID      0x0341

​

static inline int

superio_inb(int base, int reg)

{

    outb(reg, base);

    return inb(base + 1);

}

​

static int

superio_inw(int base, int reg)

{

    int val;

    outb(reg++, base);

    val = inb(base + 1) << 8;

    outb(reg, base);

    val |= inb(base + 1);

    return val;

}

​

static inline void

superio_select(int base, int ld)

{

    outb(SIO_REG_LDSEL, base);

    outb(ld, base + 1);

}

​

static inline int

superio_enter(int base)

{

    if (!request_muxed_region(base, 2, DRVNAME))

        return -EBUSY;

​

    outb(0x87, base);