arch/x86/cpu/baytrail/acpi.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
 */

#include <cpu.h>
#include <dm.h>
#include <log.h>
#include <mapmem.h>
#include <acpi/acpi_s3.h>
#include <acpi/acpi_table.h>
#include <asm/io.h>
#include <asm/tables.h>
#include <asm/arch/global_nvs.h>
#include <asm/arch/iomap.h>
#include <dm/uclass-internal.h>

static int baytrail_write_fadt(struct acpi_ctx *ctx,
			       const struct acpi_writer *entry)
{
	struct acpi_table_header *header;
	struct acpi_fadt *fadt;

	fadt = ctx->current;
	header = &fadt->header;
	u16 pmbase = ACPI_BASE_ADDRESS;

	memset(fadt, '\0', sizeof(struct acpi_fadt));

	acpi_fill_header(header, "FACP");
	header->length = sizeof(struct acpi_fadt);
	header->revision = 4;

	fadt->preferred_pm_profile = ACPI_PM_MOBILE;
	fadt->sci_int = 9;
	fadt->smi_cmd = 0;
	fadt->acpi_enable = 0;
	fadt->acpi_disable = 0;
	fadt->s4bios_req = 0;
	fadt->pstate_cnt = 0;
	fadt->pm1a_evt_blk = pmbase;
	fadt->pm1b_evt_blk = 0x0;
	fadt->pm1a_cnt_blk = pmbase + 0x4;
	fadt->pm1b_cnt_blk = 0x0;
	fadt->pm2_cnt_blk = pmbase + 0x50;
	fadt->pm_tmr_blk = pmbase + 0x8;
	fadt->gpe0_blk = pmbase + 0x20;
	fadt->gpe1_blk = 0;
	fadt->pm1_evt_len = 4;
	fadt->pm1_cnt_len = 2;
	fadt->pm2_cnt_len = 1;
	fadt->pm_tmr_len = 4;
	fadt->gpe0_blk_len = 8;
	fadt->gpe1_blk_len = 0;
	fadt->gpe1_base = 0;
	fadt->cst_cnt = 0;
	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
	fadt->flush_size = 0;
	fadt->flush_stride = 0;
	fadt->duty_offset = 1;
	fadt->duty_width = 0;
	fadt->day_alrm = 0x0d;
	fadt->mon_alrm = 0x00;
	fadt->century = 0x00;
	fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042;
	fadt->flags = ACPI_FADT_WBINVD | ACPI_FADT_C1_SUPPORTED |
		ACPI_FADT_C2_MP_SUPPORTED | ACPI_FADT_SLEEP_BUTTON |
		ACPI_FADT_S4_RTC_WAKE | ACPI_FADT_RESET_REGISTER |
		ACPI_FADT_PLATFORM_CLOCK;

	fadt->reset_reg.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->reset_reg.bit_width = 8;
	fadt->reset_reg.bit_offset = 0;
	fadt->reset_reg.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
	fadt->reset_reg.addrl = IO_PORT_RESET;
	fadt->reset_reg.addrh = 0;
	fadt->reset_value = SYS_RST | RST_CPU | FULL_RST;

	fadt->x_firmware_ctrl = map_to_sysmem(ctx->facs);
	fadt->x_dsdt = map_to_sysmem(ctx->dsdt);

	fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm1a_evt_blk.bit_width = fadt->pm1_evt_len * 8;
	fadt->x_pm1a_evt_blk.bit_offset = 0;
	fadt->x_pm1a_evt_blk.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
	fadt->x_pm1a_evt_blk.addrl = fadt->pm1a_evt_blk;
	fadt->x_pm1a_evt_blk.addrh = 0x0;

	fadt->x_pm1b_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm1b_evt_blk.bit_width = 0;
	fadt->x_pm1b_evt_blk.bit_offset = 0;
	fadt->x_pm1b_evt_blk.access_size = 0;
	fadt->x_pm1b_evt_blk.addrl = 0x0;
	fadt->x_pm1b_evt_blk.addrh = 0x0;

	fadt->x_pm1a_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm1a_cnt_blk.bit_width = fadt->pm1_cnt_len * 8;
	fadt->x_pm1a_cnt_blk.bit_offset = 0;
	fadt->x_pm1a_cnt_blk.access_size = ACPI_ACCESS_SIZE_WORD_ACCESS;
	fadt->x_pm1a_cnt_blk.addrl = fadt->pm1a_cnt_blk;
	fadt->x_pm1a_cnt_blk.addrh = 0x0;

	fadt->x_pm1b_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm1b_cnt_blk.bit_width = 0;
	fadt->x_pm1b_cnt_blk.bit_offset = 0;
	fadt->x_pm1b_cnt_blk.access_size = 0;
	fadt->x_pm1b_cnt_blk.addrl = 0x0;
	fadt->x_pm1b_cnt_blk.addrh = 0x0;

	fadt->x_pm2_cnt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm2_cnt_blk.bit_width = fadt->pm2_cnt_len * 8;
	fadt->x_pm2_cnt_blk.bit_offset = 0;
	fadt->x_pm2_cnt_blk.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
	fadt->x_pm2_cnt_blk.addrl = fadt->pm2_cnt_blk;
	fadt->x_pm2_cnt_blk.addrh = 0x0;

	fadt->x_pm_tmr_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
	fadt->x_pm_tmr_blk.bit_offset = 0;
	fadt->x_pm_tmr_blk.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
	fadt->x_pm_tmr_blk.addrl = fadt->pm_tmr_blk;
	fadt->x_pm_tmr_blk.addrh = 0x0;

	fadt->x_gpe0_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_gpe0_blk.bit_width = fadt->gpe0_blk_len * 8;
	fadt->x_gpe0_blk.bit_offset = 0;
	fadt->x_gpe0_blk.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
	fadt->x_gpe0_blk.addrl = fadt->gpe0_blk;
	fadt->x_gpe0_blk.addrh = 0x0;

	fadt->x_gpe1_blk.space_id = ACPI_ADDRESS_SPACE_IO;
	fadt->x_gpe1_blk.bit_width = 0;
	fadt->x_gpe1_blk.bit_offset = 0;
	fadt->x_gpe1_blk.access_size = 0;
	fadt->x_gpe1_blk.addrl = 0x0;
	fadt->x_gpe1_blk.addrh = 0x0;

	header->checksum = table_compute_checksum(fadt, header->length);

	return acpi_add_fadt(ctx, fadt);
}
ACPI_WRITER(5fadt, "FADT", baytrail_write_fadt, 0);

int acpi_create_gnvs(struct acpi_global_nvs *gnvs)
{
	struct udevice *dev;
	int ret;

	/* at least we have one processor */
	gnvs->pcnt = 1;
	/* override the processor count with actual number */
	ret = uclass_find_first_device(UCLASS_CPU, &dev);
	if (ret == 0 && dev != NULL) {
		ret = cpu_get_count(dev);
		if (ret > 0)
			gnvs->pcnt = ret;
	}

	/* determine whether internal uart is on */
	if (IS_ENABLED(CONFIG_INTERNAL_UART))
		gnvs->iuart_en = 1;
	else
		gnvs->iuart_en = 0;

	return 0;
}

/*
 * The following two routines are called at a very early stage, even before
 * FSP 2nd phase API fsp_init() is called. Registers off ACPI_BASE_ADDRESS
 * and PMC_BASE_ADDRESS are accessed, so we need make sure the base addresses
 * of these two blocks are programmed by either U-Boot or FSP.
 *
 * It has been verified that 1st phase API (see arch/x86/lib/fsp1/fsp_car.S)
 * on Intel BayTrail SoC already initializes these two base addresses so
 * we are safe to access these registers here.
 */

enum acpi_sleep_state chipset_prev_sleep_state(void)
{
	u32 pm1_sts;
	u32 pm1_cnt;
	u32 gen_pmcon1;
	enum acpi_sleep_state prev_sleep_state = ACPI_S0;

	/* Read Power State */
	pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS);
	pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
	gen_pmcon1 = readl(PMC_BASE_ADDRESS + GEN_PMCON1);

	debug("PM1_STS = 0x%x PM1_CNT = 0x%x GEN_PMCON1 = 0x%x\n",
	      pm1_sts, pm1_cnt, gen_pmcon1);

	if (pm1_sts & WAK_STS)
		prev_sleep_state = acpi_sleep_from_pm1(pm1_cnt);

	if (gen_pmcon1 & (PWR_FLR | SUS_PWR_FLR))
		prev_sleep_state = ACPI_S5;

	return prev_sleep_state;
}

void chipset_clear_sleep_state(void)
{
	u32 pm1_cnt;

	pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
	outl(pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT);
}