76cedd2c29
This change moves all ACPI table support in coreboot currently living under arch/x86 into common code to make it architecture independent. ACPI table generation is not really tied to any architecture and hence it makes sense to move this to its own directory. In order to make it easier to review, this change is being split into multiple CLs. This is change 3/5 which basically is generated by running the following command: $ git grep -iIl "arch/acpi" | xargs sed -i 's/arch\/acpi/acpi\/acpi/g' BUG=b:155428745 Change-Id: I16b1c45d954d6440fb9db1d3710063a47b582eae Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40938 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* This file is part of the coreboot project. */
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#include <acpi/acpi_device.h>
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#include <acpi/acpigen.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/path.h>
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#include <gpio.h>
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#include <stdint.h>
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#include "chip.h"
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#if CONFIG(HAVE_ACPI_TABLES)
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#define MAX98357A_ACPI_NAME "MAXM"
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static void max98357a_fill_ssdt(const struct device *dev)
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{
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struct drivers_generic_max98357a_config *config = dev->chip_info;
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const char *path;
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struct acpi_dp *dp;
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if (!dev->enabled || !config)
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return;
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const char *scope = acpi_device_scope(dev);
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const char *name = acpi_device_name(dev);
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if (!scope || !name)
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return;
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/* Device */
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acpigen_write_scope(scope);
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acpigen_write_device(name);
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if (!config->hid) {
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printk(BIOS_ERR, "%s: ERROR: _HID required\n", dev_path(dev));
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return;
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}
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acpigen_write_name_string("_HID", config->hid);
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acpigen_write_name_integer("_UID", 0);
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acpigen_write_name_string("_DDN", dev->chip_ops->name);
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acpigen_write_STA(acpi_device_status(dev));
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/* Resources */
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acpigen_write_name("_CRS");
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acpigen_write_resourcetemplate_header();
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acpi_device_write_gpio(&config->sdmode_gpio);
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acpigen_write_resourcetemplate_footer();
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/* _DSD for devicetree properties */
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/* This points to the first pin in the first gpio entry in _CRS */
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path = acpi_device_path(dev);
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dp = acpi_dp_new_table("_DSD");
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acpi_dp_add_gpio(dp, "sdmode-gpio", path, 0, 0,
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config->sdmode_gpio.polarity);
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acpi_dp_add_integer(dp, "sdmode-delay", config->sdmode_delay);
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acpi_dp_write(dp);
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acpigen_pop_len(); /* Device */
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acpigen_pop_len(); /* Scope */
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printk(BIOS_INFO, "%s: %s\n", path, dev->chip_ops->name);
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}
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static const char *max98357a_acpi_name(const struct device *dev)
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{
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return MAX98357A_ACPI_NAME;
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}
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#endif
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static struct device_operations max98357a_ops = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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#if CONFIG(HAVE_ACPI_TABLES)
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.acpi_name = max98357a_acpi_name,
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.acpi_fill_ssdt = max98357a_fill_ssdt,
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#endif
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};
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static void max98357a_enable(struct device *dev)
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{
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struct drivers_generic_max98357a_config *config = dev->chip_info;
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/* Check if device is present by reading GPIO */
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if (config->device_present_gpio) {
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int present = gpio_get(config->device_present_gpio);
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present ^= config->device_present_gpio_invert;
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printk(BIOS_INFO, "%s is %spresent\n",
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dev->chip_ops->name, present ? "" : "not ");
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if (!present) {
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dev->enabled = 0;
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return;
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}
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}
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dev->ops = &max98357a_ops;
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}
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struct chip_operations drivers_generic_max98357a_ops = {
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CHIP_NAME("Maxim Integrated 98357A Amplifier")
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.enable_dev = max98357a_enable
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};
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