| /* |
| * This file is part of the coreboot project. |
| * |
| * |
| * SPDX-License-Identifier: GPL-2.0-or-later |
| */ |
| |
| #include <arch/acpi.h> |
| #include <arch/acpi_device.h> |
| #include <arch/acpigen.h> |
| #include <console/console.h> |
| #include <drivers/usb/acpi/chip.h> |
| #include <stdlib.h> |
| |
| #include "chip.h" |
| #include "ec.h" |
| #include "ec_commands.h" |
| |
| #define GOOGLE_CHROMEEC_USBC_DEVICE_PARENT "CREC" |
| #define GOOGLE_CHROMEEC_USBC_DEVICE_HID "GOOG0014" |
| #define GOOGLE_CHROMEEC_USBC_DEVICE_NAME "USBC" |
| |
| const char *google_chromeec_acpi_name(const struct device *dev) |
| { |
| return "EC0"; |
| } |
| |
| static const char *power_role_to_str(enum ec_pd_power_role_caps power_role) |
| { |
| switch (power_role) { |
| case EC_PD_POWER_ROLE_SOURCE: |
| return "source"; |
| case EC_PD_POWER_ROLE_SINK: |
| return "sink"; |
| case EC_PD_POWER_ROLE_DUAL: |
| return "dual"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| static const char *try_power_role_to_str(enum ec_pd_try_power_role_caps try_power_role) |
| { |
| switch (try_power_role) { |
| case EC_PD_TRY_POWER_ROLE_NONE: |
| /* |
| * This should never get returned; if there is no try-power role for a device, |
| * then the try-power-role field is not added to the DSD. Thus, this is just |
| * for completeness. |
| */ |
| return "none"; |
| case EC_PD_TRY_POWER_ROLE_SINK: |
| return "sink"; |
| case EC_PD_TRY_POWER_ROLE_SOURCE: |
| return "source"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| static const char *data_role_to_str(enum ec_pd_data_role_caps data_role) |
| { |
| switch (data_role) { |
| case EC_PD_DATA_ROLE_DFP: |
| return "host"; |
| case EC_PD_DATA_ROLE_UFP: |
| return "device"; |
| case EC_PD_DATA_ROLE_DUAL: |
| return "dual"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| /* |
| * Apparently these are supposed to be uppercase, in contrast to the other |
| * lowercase fields. |
| */ |
| static const char *port_location_to_str(enum ec_pd_port_location port_location) |
| { |
| switch (port_location) { |
| case EC_PD_PORT_LOCATION_LEFT: |
| return "LEFT"; |
| case EC_PD_PORT_LOCATION_RIGHT: |
| return "RIGHT"; |
| case EC_PD_PORT_LOCATION_BACK: |
| return "BACK"; |
| case EC_PD_PORT_LOCATION_FRONT: |
| return "FRONT"; |
| case EC_PD_PORT_LOCATION_LEFT_FRONT: |
| return "LEFT_FRONT"; |
| case EC_PD_PORT_LOCATION_LEFT_BACK: |
| return "LEFT_BACK"; |
| case EC_PD_PORT_LOCATION_RIGHT_FRONT: |
| return "RIGHT_FRONT"; |
| case EC_PD_PORT_LOCATION_RIGHT_BACK: |
| return "RIGHT_BACK"; |
| case EC_PD_PORT_LOCATION_BACK_LEFT: |
| return "BACK_LEFT"; |
| case EC_PD_PORT_LOCATION_BACK_RIGHT: |
| return "BACK_RIGHT"; |
| case EC_PD_PORT_LOCATION_UNKNOWN: /* intentional fallthrough */ |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| |
| /* Add port capabilities as DP properties */ |
| static void add_port_caps(struct acpi_dp *dsd, const struct usb_pd_port_caps *port_caps) |
| { |
| acpi_dp_add_string(dsd, "power-role", power_role_to_str(port_caps->power_role_cap)); |
| |
| if (port_caps->try_power_role_cap != EC_PD_TRY_POWER_ROLE_NONE) |
| acpi_dp_add_string(dsd, "try-power-role", |
| try_power_role_to_str(port_caps->try_power_role_cap)); |
| |
| acpi_dp_add_string(dsd, "data-role", data_role_to_str(port_caps->data_role_cap)); |
| acpi_dp_add_string(dsd, "port-location", port_location_to_str( |
| port_caps->port_location)); |
| } |
| |
| /* |
| * Helper for fill_ssdt_generator. This adds references to the USB |
| * port objects so that the consumer of this information can know |
| * whether the port supports USB2 and/or USB3. |
| */ |
| static void add_usb_port_references(struct acpi_dp *dsd, int port_number) |
| { |
| static const char usb2_port[] = "usb2-port"; |
| static const char usb3_port[] = "usb3-port"; |
| struct device *port = NULL; |
| const char *path; |
| const char *usb_port_type; |
| struct drivers_usb_acpi_config *config; |
| |
| /* |
| * Unfortunately, the acpi_dp_* API doesn't write out the data immediately, thus we need |
| * different storage areas for all of the strings, so strdup() is used for that. It is |
| * safe to use strdup() here, because the strings are generated at build-time and are |
| * guaranteed to be NUL-terminated (they come from the devicetree). |
| */ |
| while ((port = dev_find_path(port, DEVICE_PATH_USB)) != NULL) { |
| if (!port->enabled || port->path.type != DEVICE_PATH_USB) |
| continue; |
| |
| /* Looking for USB 2 & 3 port devices only */ |
| if (port->path.usb.port_type == 2) |
| usb_port_type = usb2_port; |
| else if (port->path.usb.port_type == 3) |
| usb_port_type = usb3_port; |
| else |
| continue; |
| |
| config = port->chip_info; |
| |
| /* |
| * Look at only USB Type-C ports, making sure they match the |
| * port number we're looking for (the 'token' field in 'group'). |
| * Also note that 'port_number' is 0-based, whereas the 'token' |
| * field is 1-based. |
| */ |
| if ((config->type != UPC_TYPE_C_USB2_ONLY) && |
| (config->type != UPC_TYPE_C_USB2_SS_SWITCH) && |
| (config->type != UPC_TYPE_C_USB2_SS)) |
| continue; |
| |
| if (config->group.token != (port_number + 1)) |
| continue; |
| |
| path = acpi_device_path(port); |
| if (path) { |
| path = strdup(path); |
| if (!path) |
| continue; |
| |
| acpi_dp_add_reference(dsd, usb_port_type, path); |
| } |
| } |
| } |
| |
| static void fill_ssdt_typec_device(int num_ports) |
| { |
| struct usb_pd_port_caps port_caps; |
| char con_name[] = "CONx"; |
| struct acpi_dp *dsd; |
| int rv; |
| int i; |
| |
| acpigen_write_device(GOOGLE_CHROMEEC_USBC_DEVICE_NAME); |
| acpigen_write_name_string("_HID", GOOGLE_CHROMEEC_USBC_DEVICE_HID); |
| acpigen_write_name_string("_DDN", "ChromeOS EC Embedded Controller " |
| "USB Type-C Control"); |
| |
| for (i = 0; i < num_ports; ++i) { |
| rv = google_chromeec_get_pd_port_caps(i, &port_caps); |
| if (rv) |
| continue; |
| |
| con_name[3] = (char)i + '0'; |
| acpigen_write_device(con_name); |
| acpigen_write_name_integer("_ADR", i); |
| |
| /* _DSD, Device-Specific Data */ |
| dsd = acpi_dp_new_table("_DSD"); |
| |
| acpi_dp_add_integer(dsd, "port-number", i); |
| add_port_caps(dsd, &port_caps); |
| add_usb_port_references(dsd, i); |
| |
| acpi_dp_write(dsd); |
| acpigen_pop_len(); /* Device CONx */ |
| } |
| |
| acpigen_pop_len(); /* Device GOOGLE_CHROMEEC_USBC_DEVICE_NAME */ |
| } |
| |
| void google_chromeec_fill_ssdt_generator(struct device *dev) |
| { |
| int num_ports; |
| if (google_chromeec_get_num_pd_ports(&num_ports)) |
| return; |
| |
| /* Add TypeC device under the existing device + ".CREC" scope */ |
| acpigen_write_scope(acpi_device_path_join(dev, GOOGLE_CHROMEEC_USBC_DEVICE_PARENT)); |
| fill_ssdt_typec_device(num_ports); |
| acpigen_pop_len(); /* Scope */ |
| } |