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/* 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;
};
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