soc: x86: add gpio acpi resource enumeration (b5917146) · Commits · Wenxi XU / zephyr

soc/intel/alder_lake/CMakeLists.txt

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		@@ -8,5 +8,6 @@ zephyr_library_include_directories(${ZEPHYR_BASE}/drivers)
		zephyr_cc_option(-march=goldmont)

		zephyr_library_sources(cpu.c)
		zephyr_library_sources(../common/soc_gpio.c)

		set(SOC_LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld CACHE INTERNAL "")

soc/intel/alder_lake/soc.h

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		@@ -23,6 +23,10 @@
		#include <zephyr/random/random.h>
		#endif

		#if DT_ANY_INST_HAS_PROP_STATUS_OKAY(acpi_hid)
		#include "../common/soc_gpio.h"
		#endif

		#ifdef CONFIG_GPIO_INTEL
		#include "soc_gpio.h"
		#endif

soc/intel/common/soc_gpio.c

0 → 100644

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		/*
		* Copyright (c) 2023 Intel Corporation.
		*
		* SPDX-License-Identifier: Apache-2.0
		*/

		#include <errno.h>
		#include <zephyr/acpi/acpi.h>
		#include "soc.h"
		#include "soc_gpio.h"

		#define GET_GPIO_BASE_NUM ("\\_SB.GINF")

		static int gpio_info_acpi_get(uint32_t bank_idx, uint32_t field_idx, uint32_t *ret_val)
		{
		int status;
		ACPI_OBJECT args[2];
		ACPI_OBJECT_LIST arg_list;
		ACPI_OBJECT gpio_obj;

		arg_list.Count = ARRAY_SIZE(args);
		arg_list.Pointer = args;

		args[0].Type = ACPI_TYPE_INTEGER;
		args[0].Integer.Value = bank_idx;

		args[1].Type = ACPI_TYPE_INTEGER;
		args[1].Integer.Value = field_idx;

		status = acpi_invoke_method(GET_GPIO_BASE_NUM, &arg_list, &gpio_obj);
		if (status) {
		return status;
		}

		if (gpio_obj.Type == ACPI_TYPE_INTEGER) {
		*ret_val = gpio_obj.Integer.Value;
		}

		return status;
		}

		int soc_acpi_gpio_resource_get(int bank_idx, char hid, char uid, struct gpio_acpi_res *res)
		{
		int ret;
		struct acpi_dev *acpi_child;
		struct acpi_irq_resource irq_res;
		struct acpi_mmio_resource mmio_res;
		uint32_t field_val[7];
		uint16_t irqs[CONFIG_ACPI_IRQ_VECTOR_MAX];
		struct acpi_reg_base reg_base[CONFIG_ACPI_MMIO_ENTRIES_MAX];

		acpi_child = acpi_device_get(hid, uid);
		if (!acpi_child) {
		printk("acpi_device_get failed\n");
		return -EIO;
		}

		mmio_res.mmio_max = ARRAY_SIZE(reg_base);
		mmio_res.reg_base = reg_base;
		ret = acpi_device_mmio_get(acpi_child, &mmio_res);
		if (ret) {
		printk("acpi_device_mmio_get failed\n");
		return ret;
		}

		irq_res.irq_vector_max = ARRAY_SIZE(irqs);
		irq_res.irqs = irqs;
		ret = acpi_device_irq_get(acpi_child, &irq_res);
		if (ret) {
		printk("acpi_device_irq_get failed\n");
		return ret;
		}

		res->irq = irq_res.irqs[0];
		res->irq_flags = irq_res.flags;

		if (ACPI_RESOURCE_TYPE_GET(&mmio_res) == ACPI_RES_TYPE_MEM) {
		for (int i = 0; i < ARRAY_SIZE(field_val); i++) {
		ret = gpio_info_acpi_get(bank_idx, i, &field_val[i]);
		if (ret) {
		printk("gpio_info_acpi_get failed\n");
		return ret;
		}
		}

		res->reg_base = ACPI_MMIO_GET(&mmio_res) & (~0x0FFFFFF);
		res->reg_base += field_val[0];
		res->len = ACPI_RESOURCE_SIZE_GET(&mmio_res);
		res->num_pins = field_val[1];
		res->pad_base = field_val[2];
		res->host_owner_reg = field_val[3];
		res->pad_owner_reg = field_val[4];
		res->intr_stat_reg = field_val[5] - 0x40;
		res->base_num = field_val[6];
		} else {
		printk("ACPI_RES_TYPE_MEM failed\n");
		return -ENODEV;
		}

		return 0;
		}

soc/intel/common/soc_gpio.h

0 → 100644

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		/*
		* Copyright (c) 2023 Intel Corporation.
		*
		* SPDX-License-Identifier: Apache-2.0
		*/

		struct gpio_acpi_res {
		uintptr_t reg_base;
		uint32_t len;
		uint32_t pad_base;
		uint8_t num_pins;
		uint32_t host_owner_reg;
		uint32_t pad_owner_reg;
		uint32_t intr_stat_reg;
		uint16_t base_num;
		uint16_t irq;
		uint32_t irq_flags;
		};

		/**
		* @brief Retrieve current resource settings of a gpio device from acpi.
		*
		* @param bank_idx band index of the gpio group (eg: gpp_a, gpp_b etc.)
		* @param hid the hardware id of the acpi device
		* @param uid the unique id of the acpi device
		* @param res the pointer to resource struct on which data return
		* @return return 0 on success or error code
		*/
		int soc_acpi_gpio_resource_get(int bank_idx, char hid, char uid, struct gpio_acpi_res *res);

soc/intel/raptor_lake/CMakeLists.txt

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		@@ -3,5 +3,6 @@
		zephyr_include_directories(.)

		zephyr_cc_option(-march=goldmont)
		zephyr_library_sources(../common/soc_gpio.c)

		set(SOC_LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld CACHE INTERNAL "")

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