1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2016 Stefan Roese <sr@denx.de>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <nuvoton_nct6102d.h>
9*4882a593Smuzhiyun #include <asm/io.h>
10*4882a593Smuzhiyun #include <asm/pnp_def.h>
11*4882a593Smuzhiyun
superio_outb(int reg,int val)12*4882a593Smuzhiyun static void superio_outb(int reg, int val)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun outb(reg, NCT_EFER);
15*4882a593Smuzhiyun outb(val, NCT_EFDR);
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun
superio_inb(int reg)18*4882a593Smuzhiyun static inline int superio_inb(int reg)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun outb(reg, NCT_EFER);
21*4882a593Smuzhiyun return inb(NCT_EFDR);
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun
superio_enter(void)24*4882a593Smuzhiyun static int superio_enter(void)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun outb(NCT_ENTRY_KEY, NCT_EFER); /* Enter extended function mode */
27*4882a593Smuzhiyun outb(NCT_ENTRY_KEY, NCT_EFER); /* Again according to manual */
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun return 0;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
superio_select(int ld)32*4882a593Smuzhiyun static void superio_select(int ld)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun superio_outb(NCT_LD_SELECT_REG, ld);
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
superio_exit(void)37*4882a593Smuzhiyun static void superio_exit(void)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun outb(NCT_EXIT_KEY, NCT_EFER); /* Leave extended function mode */
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun /*
43*4882a593Smuzhiyun * The Nuvoton NCT6102D starts per default after reset with both,
44*4882a593Smuzhiyun * the internal watchdog and the internal legacy UART enabled. This
45*4882a593Smuzhiyun * code provides a function to disable the watchdog.
46*4882a593Smuzhiyun */
nct6102d_wdt_disable(void)47*4882a593Smuzhiyun int nct6102d_wdt_disable(void)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun superio_enter();
50*4882a593Smuzhiyun /* Select logical device for WDT */
51*4882a593Smuzhiyun superio_select(NCT6102D_LD_WDT);
52*4882a593Smuzhiyun superio_outb(NCT6102D_WDT_TIMEOUT, 0x00);
53*4882a593Smuzhiyun superio_exit();
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun return 0;
56*4882a593Smuzhiyun }
57