/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include "chip.h" static bool usb_acpi_add_gpios_to_crs(struct drivers_usb_acpi_config *cfg) { if (cfg->privacy_gpio.pin_count) return true; if (cfg->reset_gpio.pin_count && !cfg->has_power_resource) return true; return false; } static int usb_acpi_write_gpio(struct acpi_gpio *gpio, int *curr_index) { int ret = -1; if (gpio->pin_count == 0) return ret; acpi_device_write_gpio(gpio); ret = *curr_index; (*curr_index)++; return ret; } static void usb_acpi_fill_ssdt_generator(const struct device *dev) { struct drivers_usb_acpi_config *config = dev->chip_info; const char *path = acpi_device_path(dev); struct acpi_pld pld; if (!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 (usb_acpi_get_pld(dev, &pld)) acpigen_write_pld(&pld); else printk(BIOS_ERR, "Error retrieving PLD for %s\n", path); /* Resources */ if (usb_acpi_add_gpios_to_crs(config) == true) { struct acpi_dp *dsd; int idx = 0; int reset_gpio_index = -1; int privacy_gpio_index; acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); if (!config->has_power_resource) { reset_gpio_index = usb_acpi_write_gpio( &config->reset_gpio, &idx); } privacy_gpio_index = usb_acpi_write_gpio(&config->privacy_gpio, &idx); acpigen_write_resourcetemplate_footer(); dsd = acpi_dp_new_table("_DSD"); if (reset_gpio_index >= 0) acpi_dp_add_gpio(dsd, "reset-gpio", path, reset_gpio_index, 0, config->reset_gpio.active_low); if (privacy_gpio_index >= 0) acpi_dp_add_gpio(dsd, "privacy-gpio", path, privacy_gpio_index, 0, config->privacy_gpio.active_low); acpi_dp_write(dsd); } if (config->has_power_resource) { const struct acpi_power_res_params power_res_params = { &config->reset_gpio, config->reset_delay_ms, config->reset_off_delay_ms, &config->enable_gpio, config->enable_delay_ms, config->enable_off_delay_ms, NULL, 0, 0, config->use_gpio_for_status }; acpi_device_add_power_res(&power_res_params); } 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 }; bool usb_acpi_get_pld(const struct device *usb_device, struct acpi_pld *pld) { struct drivers_usb_acpi_config *config; if (!usb_device || !usb_device->chip_info || usb_device->chip_ops != &drivers_usb_acpi_ops) return false; config = usb_device->chip_info; if (config->use_custom_pld) *pld = config->custom_pld; else acpi_pld_fill_usb(pld, config->type, &config->group); return true; }