Duncan Laurie | 4721f43 | 2018-05-07 15:24:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright 2018 Google LLC |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <arch/acpi_device.h> |
| 17 | #include <arch/acpi_pld.h> |
| 18 | #include <arch/acpigen.h> |
| 19 | #include <console/console.h> |
| 20 | #include <device/device.h> |
| 21 | #include <device/path.h> |
| 22 | #include <stdint.h> |
| 23 | #include <string.h> |
| 24 | #include "chip.h" |
| 25 | |
Nick Vaccaro | 0a495eb | 2018-11-12 19:43:35 -0800 | [diff] [blame^] | 26 | static bool usb_acpi_add_gpios_to_crs(struct drivers_usb_acpi_config *cfg) |
| 27 | { |
| 28 | /* |
| 29 | * Return false if reset GPIO is not provided. |
| 30 | */ |
| 31 | if (cfg->reset_gpio.pin_count == 0) |
| 32 | return false; |
| 33 | |
| 34 | return true; |
| 35 | } |
| 36 | |
Duncan Laurie | 4721f43 | 2018-05-07 15:24:10 -0700 | [diff] [blame] | 37 | static void usb_acpi_fill_ssdt_generator(struct device *dev) |
| 38 | { |
| 39 | struct drivers_usb_acpi_config *config = dev->chip_info; |
| 40 | const char *path = acpi_device_path(dev); |
| 41 | |
| 42 | if (!dev->enabled || !path || !config) |
| 43 | return; |
| 44 | |
| 45 | /* Don't generate output for hubs, only ports */ |
| 46 | if (config->type == UPC_TYPE_HUB) |
| 47 | return; |
| 48 | |
| 49 | acpigen_write_scope(path); |
| 50 | if (config->desc) |
| 51 | acpigen_write_name_string("_DDN", config->desc); |
| 52 | acpigen_write_upc(config->type); |
| 53 | |
| 54 | if (config->use_custom_pld) { |
| 55 | /* Use board defined PLD */ |
| 56 | acpigen_write_pld(&config->custom_pld); |
| 57 | } else { |
| 58 | /* Fill PLD strucutre based on port type */ |
| 59 | struct acpi_pld pld; |
| 60 | acpi_pld_fill_usb(&pld, config->type); |
| 61 | acpigen_write_pld(&pld); |
| 62 | } |
| 63 | |
Nick Vaccaro | 0a495eb | 2018-11-12 19:43:35 -0800 | [diff] [blame^] | 64 | /* Resources */ |
| 65 | if (usb_acpi_add_gpios_to_crs(config) == true) { |
| 66 | struct acpi_dp *dsd; |
| 67 | |
| 68 | acpigen_write_name("_CRS"); |
| 69 | acpigen_write_resourcetemplate_header(); |
| 70 | acpi_device_write_gpio(&config->reset_gpio); |
| 71 | acpigen_write_resourcetemplate_footer(); |
| 72 | |
| 73 | dsd = acpi_dp_new_table("_DSD"); |
| 74 | acpi_dp_add_gpio(dsd, "reset-gpio", path, 0, 0, |
| 75 | config->reset_gpio.polarity); |
| 76 | acpi_dp_write(dsd); |
| 77 | } |
| 78 | |
Duncan Laurie | 4721f43 | 2018-05-07 15:24:10 -0700 | [diff] [blame] | 79 | acpigen_pop_len(); |
| 80 | |
| 81 | printk(BIOS_INFO, "%s: %s at %s\n", path, |
| 82 | config->desc ? : dev->chip_ops->name, dev_path(dev)); |
| 83 | } |
| 84 | |
| 85 | static struct device_operations usb_acpi_ops = { |
| 86 | .read_resources = DEVICE_NOOP, |
| 87 | .set_resources = DEVICE_NOOP, |
| 88 | .enable_resources = DEVICE_NOOP, |
| 89 | .scan_bus = &scan_usb_bus, |
| 90 | .acpi_fill_ssdt_generator = &usb_acpi_fill_ssdt_generator, |
| 91 | }; |
| 92 | |
| 93 | static void usb_acpi_enable(struct device *dev) |
| 94 | { |
| 95 | dev->ops = &usb_acpi_ops; |
| 96 | } |
| 97 | |
| 98 | struct chip_operations drivers_usb_acpi_ops = { |
| 99 | CHIP_NAME("USB ACPI Device") |
| 100 | .enable_dev = &usb_acpi_enable |
| 101 | }; |