| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <arch/acpi_device.h> |
| #include <arch/acpi_pld.h> |
| #include <arch/acpigen.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <stdint.h> |
| #include "chip.h" |
| |
| static bool usb_acpi_add_gpios_to_crs(struct drivers_usb_acpi_config *cfg) |
| { |
| /* |
| * Return false if reset GPIO is not provided. |
| */ |
| if (cfg->reset_gpio.pin_count == 0) |
| return false; |
| |
| return true; |
| } |
| |
| static void usb_acpi_fill_ssdt_generator(struct device *dev) |
| { |
| struct drivers_usb_acpi_config *config = dev->chip_info; |
| const char *path = acpi_device_path(dev); |
| |
| if (!dev->enabled || !path || !config) |
| return; |
| |
| /* Don't generate output for hubs, only ports */ |
| if (config->type == UPC_TYPE_HUB) |
| return; |
| |
| acpigen_write_scope(path); |
| if (config->desc) |
| acpigen_write_name_string("_DDN", config->desc); |
| acpigen_write_upc(config->type); |
| |
| if (config->use_custom_pld) { |
| /* Use board defined PLD */ |
| acpigen_write_pld(&config->custom_pld); |
| } else { |
| /* Fill PLD strucutre based on port type */ |
| struct acpi_pld pld; |
| acpi_pld_fill_usb(&pld, config->type, &config->group); |
| acpigen_write_pld(&pld); |
| } |
| |
| /* Resources */ |
| if (usb_acpi_add_gpios_to_crs(config) == true) { |
| struct acpi_dp *dsd; |
| |
| acpigen_write_name("_CRS"); |
| acpigen_write_resourcetemplate_header(); |
| acpi_device_write_gpio(&config->reset_gpio); |
| acpigen_write_resourcetemplate_footer(); |
| |
| dsd = acpi_dp_new_table("_DSD"); |
| acpi_dp_add_gpio(dsd, "reset-gpio", path, 0, 0, |
| config->reset_gpio.polarity); |
| acpi_dp_write(dsd); |
| } |
| |
| acpigen_pop_len(); |
| |
| printk(BIOS_INFO, "%s: %s at %s\n", path, |
| config->desc ? : dev->chip_ops->name, dev_path(dev)); |
| } |
| |
| static struct device_operations usb_acpi_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .scan_bus = scan_static_bus, |
| .acpi_fill_ssdt = usb_acpi_fill_ssdt_generator, |
| }; |
| |
| static void usb_acpi_enable(struct device *dev) |
| { |
| dev->ops = &usb_acpi_ops; |
| } |
| |
| struct chip_operations drivers_usb_acpi_ops = { |
| CHIP_NAME("USB ACPI Device") |
| .enable_dev = usb_acpi_enable |
| }; |