| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <acpi/acpigen.h> |
| #include <boot/coreboot_tables.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <intelblocks/acpi.h> |
| |
| #include "chip.h" |
| |
| /* Number of registered connectors */ |
| static size_t total_conn_count; |
| |
| static void conn_init(struct device *dev) |
| { |
| total_conn_count++; |
| } |
| |
| static unsigned int get_usb_port_number(const struct device *usb_port) |
| { |
| return usb_port->path.usb.port_id + 1; |
| } |
| |
| static struct type_c_info *conn_get_cbmem_buffer(void) |
| { |
| struct type_c_info *info; |
| size_t size; |
| |
| info = cbmem_find(CBMEM_ID_TYPE_C_INFO); |
| if (info) |
| return info; |
| |
| size = sizeof(struct type_c_info) + total_conn_count * sizeof(struct type_c_port_info); |
| info = cbmem_add(CBMEM_ID_TYPE_C_INFO, size); |
| |
| if (!info) |
| return NULL; |
| |
| memset(info, 0, size); |
| return info; |
| } |
| |
| static void conn_write_cbmem_entry(struct device *dev) |
| { |
| const struct drivers_intel_pmc_mux_conn_config *config = dev->chip_info; |
| struct type_c_port_info *port_info; |
| struct type_c_info *info; |
| size_t count; |
| |
| /* |
| * Do not re-run this code on resume as the cbmem data is populated on boot-up |
| * (non-S3 path) and stays intact across S3 suspend/resume. |
| */ |
| if (acpi_is_wakeup_s3()) |
| return; |
| |
| info = conn_get_cbmem_buffer(); |
| if (!info || (info->port_count >= total_conn_count)) { |
| printk(BIOS_ERR, "No space for Type-C port info!\n"); |
| return; |
| } |
| |
| count = info->port_count; |
| port_info = &info->port_info[count]; |
| port_info->usb2_port_number = get_usb_port_number(config->usb2_port); |
| port_info->usb3_port_number = get_usb_port_number(config->usb3_port); |
| port_info->sbu_orientation = config->sbu_orientation; |
| port_info->data_orientation = config->hsl_orientation; |
| |
| printk(BIOS_INFO, "added type-c port%zu info to cbmem: usb2:%d usb3:%d sbu:%d data:%d\n", |
| count, port_info->usb2_port_number, port_info->usb3_port_number, |
| port_info->sbu_orientation, port_info->data_orientation); |
| |
| info->port_count++; |
| } |
| |
| static const char *conn_acpi_name(const struct device *dev) |
| { |
| static char name[5]; |
| snprintf(name, sizeof(name), "CON%1X", dev->path.generic.id); |
| return name; |
| } |
| |
| static const char *orientation_to_str(enum type_c_orientation ori) |
| { |
| switch (ori) { |
| case TYPEC_ORIENTATION_NORMAL: |
| return "normal"; |
| case TYPEC_ORIENTATION_REVERSE: |
| return "reverse"; |
| case TYPEC_ORIENTATION_NONE: /* Intentional fallthrough */ |
| default: |
| return ""; |
| } |
| } |
| |
| static void conn_fill_ssdt(const struct device *dev) |
| { |
| struct drivers_intel_pmc_mux_conn_config *config = dev->chip_info; |
| struct acpi_dp *dsd; |
| const char *scope; |
| const char *name; |
| |
| /* Reference the existing scope and write CONx device */ |
| scope = acpi_device_scope(dev); |
| name = acpi_device_name(dev); |
| if (!scope || !name) |
| return; |
| |
| acpigen_write_scope(scope); |
| acpigen_write_device(name); |
| |
| acpigen_write_name_integer("_ADR", dev->path.generic.id); |
| |
| /* _DSD, Device-Specific Data */ |
| dsd = acpi_dp_new_table("_DSD"); |
| acpi_dp_add_integer(dsd, "usb2-port-number", get_usb_port_number(config->usb2_port)); |
| acpi_dp_add_integer(dsd, "usb3-port-number", get_usb_port_number(config->usb3_port)); |
| |
| /* |
| * The kernel assumes that these Type-C signals (SBUs and HSLs) follow the CC lines, |
| * unless they are explicitly called out otherwise. |
| */ |
| if (config->sbu_orientation != TYPEC_ORIENTATION_NONE) |
| acpi_dp_add_string(dsd, "sbu-orientation", |
| orientation_to_str(config->sbu_orientation)); |
| |
| if (config->hsl_orientation != TYPEC_ORIENTATION_NONE) |
| acpi_dp_add_string(dsd, "hsl-orientation", |
| orientation_to_str(config->hsl_orientation)); |
| |
| acpi_dp_write(dsd); |
| |
| acpigen_pop_len(); /* CONx Device */ |
| acpigen_pop_len(); /* Scope */ |
| |
| printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), dev->chip_ops->name, |
| dev_path(dev)); |
| } |
| |
| static struct device_operations conn_dev_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .acpi_name = conn_acpi_name, |
| .acpi_fill_ssdt = conn_fill_ssdt, |
| .init = conn_init, |
| .final = conn_write_cbmem_entry, |
| }; |
| |
| static void conn_enable(struct device *dev) |
| { |
| dev->ops = &conn_dev_ops; |
| } |
| |
| struct chip_operations drivers_intel_pmc_mux_conn_ops = { |
| .name = "Intel PMC MUX CONN Driver", |
| .enable_dev = conn_enable, |
| }; |
| |
| bool intel_pmc_mux_conn_get_ports(const struct device *conn, unsigned int *usb2_port, |
| unsigned int *usb3_port) |
| { |
| const struct drivers_intel_pmc_mux_conn_config *mux_config; |
| |
| if (!conn->chip_info || conn->chip_ops != &drivers_intel_pmc_mux_conn_ops) |
| return false; |
| |
| mux_config = conn->chip_info; |
| *usb2_port = get_usb_port_number(mux_config->usb2_port); |
| *usb3_port = get_usb_port_number(mux_config->usb3_port); |
| |
| return true; |
| }; |