soc: x86: add gpio acpi resource enumeration

add support for enumerate gpio resource using acpi

Signed-off-by: Najumon B.A <najumon.ba@intel.com>

soc/intel/alder_lake/CMakeLists.txt

@@ -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

@@ -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

@@ -0,0 +1,101 @@
+/*
+ * 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

@@ -0,0 +1,29 @@
+/*
+ * 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

@@ -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 "")

soc/intel/raptor_lake/soc.h

@@ -21,6 +21,10 @@
 #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