pmutil.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#define __SIMPLE_DEVICE__
 
#include <stdint.h>
#include <arch/io.h>
#include <console/console.h>
#include <device/pci.h>
#include <intelblocks/pmclib.h>
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include <soc/pm.h>
#include <soc/soc_util.h>
 
static void print_num_status_bits(int num_bits, uint32_t status,
                                  const char *const bit_names[])
{
        int i;
 
        if (!status)
                return;
 
        for (i = num_bits - 1; 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);
                }
        }
}
 
static uint32_t print_smi_status(uint32_t smi_sts)
{
        static const char *const smi_sts_bits[] = {
                [2] = "BIOS",
                [4] = "SLP_SMI",
                [5] = "APM",
                [6] = "SWSMI_TMR",
                [8] = "PM1",
                [9] = "GPE0",
                [10] = "GPE1",
                [11] = "MC_SMI",
                [12] = "DEVMON",
                [13] = "TCO",
                [14] = "PERIODIC",
                [15] = "SERIRQ",
                [16] = "SMBUS_SMI",
                [17] = "LEGACY_USB2",
                [18] = "INTEL_USB2",
                [19] = "PATCH",
                [20] = "PCI_EXP_SMI",
                [21] = "MONITOR",
                [26] = "SPI",
                [27] = "GPIO_UNLOCK",
                [31] = "LEGACY_USB3",
        };
 
        if (!smi_sts)
                return 0;
 
        printk(BIOS_DEBUG, "SMI_STS: ");
        print_num_status_bits(ARRAY_SIZE(smi_sts_bits), smi_sts, smi_sts_bits);
        printk(BIOS_DEBUG, "\n");
 
        return smi_sts;
}
 
static uint32_t reset_smi_status(void)
{
        uint16_t pmbase = get_pmbase();
        uint32_t smi_sts = inl((uint16_t)(pmbase + SMI_STS));
        outl(smi_sts, (uint16_t)(pmbase + SMI_STS));
        return smi_sts;
}
 
uint32_t clear_smi_status(void) { return print_smi_status(reset_smi_status()); }
 
void enable_smi(uint32_t mask)
{
        uint16_t pmbase = get_pmbase();
        uint32_t smi_en = inl((uint16_t)(pmbase + SMI_EN));
        smi_en |= mask;
        outl(smi_en, (uint16_t)(pmbase + SMI_EN));
}
 
uint8_t *pmc_mmio_regs(void)
{
        uint32_t reg32;
 
        reg32 = pci_read_config32(PCH_DEV_PMC, PMC_PWRM_BASE);
 
        /* 4KiB alignment. */
        reg32 &= ~0xfff;
 
        return (void *)(uintptr_t) reg32;
}
 
void disable_smi(uint32_t mask)
{
        uint16_t pmbase = get_pmbase();
        uint32_t smi_en = inl((uint16_t)(pmbase + SMI_EN));
        smi_en &= ~mask;
        outl(smi_en, (uint16_t)(pmbase + SMI_EN));
}
 
void enable_pm1_control(uint32_t mask)
{
        uint16_t pmbase = get_pmbase();
        uint32_t pm1_cnt = inl((uint16_t)(pmbase + PM1_CNT));
        pm1_cnt |= mask;
        outl(pm1_cnt, (uint16_t)(pmbase + PM1_CNT));
}
 
void disable_pm1_control(uint32_t mask)
{
        uint16_t pmbase = get_pmbase();
        uint32_t pm1_cnt = inl((uint16_t)(pmbase + PM1_CNT));
        pm1_cnt &= ~mask;
        outl(pm1_cnt, (uint16_t)(pmbase + PM1_CNT));
}
 
static uint16_t reset_pm1_status(void)
{
        uint16_t pmbase = get_pmbase();
        uint16_t pm1_sts = inw((uint16_t)(pmbase + PM1_STS));
        outw(pm1_sts, (uint16_t)(pmbase + PM1_STS));
        return pm1_sts;
}
 
static uint16_t print_pm1_status(uint16_t pm1_sts)
{
        static const char *const pm1_sts_bits[] = {
                [0] = "TMROF",  [4] = "BM",   [5] = "GBL",
                [8] = "PWRBTN", [10] = "RTC", [11] = "PRBTNOR",
                [15] = "WAK",
        };
 
        if (!pm1_sts)
                return 0;
 
        printk(BIOS_DEBUG, "PM1_STS: ");
        print_num_status_bits(ARRAY_SIZE(pm1_sts_bits), pm1_sts, pm1_sts_bits);
        printk(BIOS_DEBUG, "\n");
 
        return pm1_sts;
}
 
uint16_t clear_pm1_status(void) { return print_pm1_status(reset_pm1_status()); }
 
void enable_pm1(uint16_t events)
{
        uint16_t pmbase = get_pmbase();
        outw(events, (uint16_t)(pmbase + PM1_EN));
}
 
static uint32_t print_tco_status(uint32_t tco_sts)
{
        static const char *const tco_sts_bits[] = {
                [0] = "NMI2SMI",     [1] = "OS_TCO_SMI",
                [2] = "TCO_INIT",    [3] = "TIMEOUT",
                [7] = "NEWCENTURY ", [8] = "BIOSWR ",
                [9] = "CPUSCI ",     [10] = "CPUSMI ",
                [12] = "CPUSERR ",   [16] = "INTRD_DET ",
                [17] = "SECOND_TO",  [20] = "SMLINK_SLV_SMI",
        };
 
        if (!tco_sts)
                return 0;
 
        printk(BIOS_DEBUG, "TCO_STS: ");
        print_num_status_bits(ARRAY_SIZE(tco_sts_bits), tco_sts, tco_sts_bits);
        printk(BIOS_DEBUG, "\n");
 
        return tco_sts;
}
 
static uint32_t reset_tco_status(void)
{
        uint16_t tcobase = get_tcobase();
        uint32_t tco_sts = inl((uint16_t)(tcobase + TCO1_STS));
        uint32_t tco_en = inl((uint16_t)(tcobase + TCO1_CNT));
 
        outl(tco_sts, (uint16_t)(tcobase + TCO1_STS));
        return tco_sts & tco_en;
}
 
uint32_t clear_tco_status(void) { return print_tco_status(reset_tco_status()); }
 
void enable_gpe(uint32_t mask)
{
        uint16_t pmbase = get_pmbase();
        uint32_t gpe0_en = inl((uint16_t)(pmbase + GPE0_EN(GPE_STD)));
        gpe0_en |= mask;
        outl(gpe0_en, (uint16_t)(pmbase + GPE0_EN(GPE_STD)));
}
 
void disable_gpe(uint32_t mask)
{
        uint16_t pmbase = get_pmbase();
        uint32_t gpe0_en = inl((uint16_t)(pmbase + GPE0_EN(GPE_STD)));
        gpe0_en &= ~mask;
        outl(gpe0_en, (uint16_t)(pmbase + GPE0_EN(GPE_STD)));
}
 
void disable_all_gpe(void) { disable_gpe(~0); }
 
static uint32_t reset_gpe_status(void)
{
        uint16_t pmbase = get_pmbase();
        uint32_t gpe_sts = inl((uint16_t)(pmbase + GPE0_STS(GPE_STD)));
        outl(gpe_sts, (uint16_t)(pmbase + GPE0_STS(GPE_STD)));
        return gpe_sts;
}
 
static uint32_t print_gpe_sts(uint32_t gpe_sts)
{
        static const char *const gpe_sts_bits[] = {
                [0] = "GPIO_0", [1] = "GPIO_1",
                [2] = "GPIO_2", [3] = "GPIO_3",
                [4] = "GPIO_4", [5] = "GPIO_5",
                [6] = "GPIO_6", [7] = "GPIO_7",
                [8] = "GPIO_8", [9] = "GPIO_9",
                [10] = "GPIO_10", [11] = "GPIO_11",
                [12] = "GPIO_12", [13] = "GPIO_13",
                [14] = "GPIO_14", [15] = "GPIO_15",
                [16] = "GPIO_16", [17] = "GPIO_17",
                [18] = "GPIO_18", [19] = "GPIO_19",
                [20] = "GPIO_20", [21] = "GPIO_21",
                [22] = "GPIO_22", [23] = "GPIO_23",
                [24] = "GPIO_24", [25] = "GPIO_25",
                [26] = "GPIO_26", [27] = "GPIO_27",
                [28] = "GPIO_28", [29] = "GPIO_29",
                [30] = "GPIO_30", [31] = "GPIO_31",
        };
 
        if (!gpe_sts)
                return gpe_sts;
 
        printk(BIOS_DEBUG, "GPE0a_STS: ");
        print_num_status_bits(ARRAY_SIZE(gpe_sts_bits), gpe_sts, gpe_sts_bits);
        printk(BIOS_DEBUG, "\n");
 
        return gpe_sts;
}
 
uint32_t clear_gpe_status(void) { return print_gpe_sts(reset_gpe_status()); }
 
void clear_pmc_status(void) { /* TODO */ }