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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2017 Siemens AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/*
* Helper functions for dealing with power management registers
* and the differences between PCH variants.
*/
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <console/console.h>
#include <soc/iomap.h>
#include <soc/lpc.h>
#include <soc/pci_devs.h>
/* Print status bits with descriptive names */
static void print_status_bits(u32 status, const char *const bit_names[])
{
int i;
if (!status)
return;
for (i = 31; i >= 0; i--) {
if (status & (1 << i)) {
if (bit_names[i])
printk(BIOS_DEBUG, "%s ", bit_names[i]);
else
printk(BIOS_DEBUG, "BIT%d ", i);
}
}
}
/* Enable events in PM1 control register */
void enable_pm1_control(u32 mask)
{
u32 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
pm1_cnt |= mask;
outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT);
}
/* Disable events in PM1 control register */
void disable_pm1_control(u32 mask)
{
u32 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
pm1_cnt &= ~mask;
outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT);
}
/* Clear and return PM1 status register */
static u16 reset_pm1_status(void)
{
u16 pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS);
outw(pm1_sts, ACPI_BASE_ADDRESS + PM1_STS);
return pm1_sts;
}
/* Print PM1 status bits */
static u16 print_pm1_status(u16 pm1_sts)
{
static const char *const pm1_sts_bits[] = {
[0] = "TMROF",
[4] = "BM",
[5] = "GBL",
[8] = "PWRBTN",
[10] = "RTC",
[11] = "PRBTNOR",
[14] = "PCIEXPWAK",
[15] = "WAK",
};
if (!pm1_sts)
return 0;
printk(BIOS_SPEW, "PM1_STS: ");
print_status_bits(pm1_sts, pm1_sts_bits);
printk(BIOS_SPEW, "\n");
return pm1_sts;
}
/* Print, clear, and return PM1 status */
u16 clear_pm1_status(void)
{
return print_pm1_status(reset_pm1_status());
}
/* Set the PM1 register to events */
void enable_pm1(u16 events)
{
outw(events, ACPI_BASE_ADDRESS + PM1_EN);
}
/* Clear and return SMI status register */
static u32 reset_smi_status(void)
{
u32 smi_sts = inl(ACPI_BASE_ADDRESS + SMI_STS);
outl(smi_sts, ACPI_BASE_ADDRESS + SMI_STS);
return smi_sts;
}
/* Print SMI status bits */
static u32 print_smi_status(u32 smi_sts)
{
static const char *const smi_sts_bits[] = {
[2] = "BIOS",
[3] = "LEGACY_USB",
[4] = "SLP_SMI",
[5] = "APM",
[6] = "SWSMI_TMR",
[8] = "PM1",
[9] = "GPE0",
[10] = "GPI",
[11] = "MCSMI",
[12] = "DEVMON",
[13] = "TCO",
[14] = "PERIODIC",
[15] = "SERIRQ_SMI",
[16] = "SMBUS_SMI",
[17] = "LEGACY_USB2",
[18] = "INTEL_USB2",
[20] = "PCI_EXP_SMI",
[21] = "MONITOR",
[26] = "SPI",
[27] = "GPIO_UNLOCK"
};
if (!smi_sts)
return 0;
printk(BIOS_DEBUG, "SMI_STS: ");
print_status_bits(smi_sts, smi_sts_bits);
printk(BIOS_DEBUG, "\n");
return smi_sts;
}
/* Print, clear, and return SMI status */
u32 clear_smi_status(void)
{
return print_smi_status(reset_smi_status());
}
/* Enable SMI event */
void enable_smi(u32 mask)
{
u32 smi_en = inl(ACPI_BASE_ADDRESS + SMI_EN);
smi_en |= mask;
outl(smi_en, ACPI_BASE_ADDRESS + SMI_EN);
}
/* Disable SMI event */
void disable_smi(u32 mask)
{
u32 smi_en = inl(ACPI_BASE_ADDRESS + SMI_EN);
smi_en &= ~mask;
outl(smi_en, ACPI_BASE_ADDRESS + SMI_EN);
}
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