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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Corsola daughter board detection */
#include "baseboard_usbc_config.h"
#include "console.h"
#include "cros_cbi.h"
#include "gpio/gpio_int.h"
#include "hooks.h"
#include "usb_mux.h"
#include "variant_db_detection.h"
#include <zephyr/drivers/gpio.h>
#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ##args)
#define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ##args)
#ifdef TEST_BUILD
uint32_t dp_status[CONFIG_USB_PD_PORT_MAX_COUNT];
#endif
static void corsola_db_config(enum corsola_db_type type)
{
switch (type) {
case CORSOLA_DB_HDMI:
/* EC_X_GPIO1 */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_hdmi_pwr),
GPIO_OUTPUT_HIGH);
/* X_EC_GPIO2 */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_ps185_ec_dp_hpd),
GPIO_INPUT);
gpio_enable_dt_interrupt(
GPIO_INT_FROM_NODELABEL(int_x_ec_gpio2));
/* EC_X_GPIO3 */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_ps185_pwrdn_odl),
GPIO_OUTPUT_HIGH | GPIO_OPEN_DRAIN);
return;
case CORSOLA_DB_TYPEC:
/* EC_X_GPIO1 */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_frs_en),
GPIO_OUTPUT_LOW);
/* X_EC_GPIO2 */
gpio_pin_configure_dt(
GPIO_DT_FROM_ALIAS(gpio_usb_c1_ppc_int_odl),
GPIO_INPUT | GPIO_PULL_UP);
gpio_enable_dt_interrupt(
GPIO_INT_FROM_NODELABEL(int_x_ec_gpio2));
/* EC_X_GPIO3 */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_dp_in_hpd),
GPIO_OUTPUT_LOW);
return;
case CORSOLA_DB_NONE:
/* Set floating pins as input with PU to prevent leakage */
gpio_pin_configure_dt(GPIO_DT_FROM_NODELABEL(gpio_ec_x_gpio1),
GPIO_INPUT | GPIO_PULL_UP);
gpio_pin_configure_dt(GPIO_DT_FROM_NODELABEL(gpio_x_ec_gpio2),
GPIO_INPUT | GPIO_PULL_UP);
gpio_pin_configure_dt(GPIO_DT_FROM_NODELABEL(gpio_ec_x_gpio3),
GPIO_INPUT | GPIO_PULL_UP);
return;
default:
break;
}
}
enum corsola_db_type corsola_get_db_type(void)
{
#if DT_NODE_EXISTS(DT_NODELABEL(db_config))
int ret;
uint32_t val;
#endif
static enum corsola_db_type db = CORSOLA_DB_UNINIT;
if (db != CORSOLA_DB_UNINIT) {
return db;
}
if (!gpio_pin_get_dt(GPIO_DT_FROM_NODELABEL(gpio_hdmi_prsnt_odl))) {
db = CORSOLA_DB_HDMI;
} else {
db = CORSOLA_DB_TYPEC;
}
/* Detect for no sub board case by FW_CONFIG */
#if DT_NODE_EXISTS(DT_NODELABEL(db_config))
ret = cros_cbi_get_fw_config(DB, &val);
if (ret != 0) {
CPRINTS("Error retrieving CBI FW_CONFIG field %d", DB);
} else if (val == DB_NONE) {
db = CORSOLA_DB_NONE;
}
#endif
corsola_db_config(db);
switch (db) {
case CORSOLA_DB_NONE:
CPRINTS("Detect %s DB", "NONE");
break;
case CORSOLA_DB_TYPEC:
CPRINTS("Detect %s DB", "TYPEC");
break;
case CORSOLA_DB_HDMI:
CPRINTS("Detect %s DB", "HDMI");
break;
default:
CPRINTS("DB UNINIT");
break;
}
return db;
}
static void corsola_db_init(void)
{
corsola_get_db_type();
}
DECLARE_HOOK(HOOK_INIT, corsola_db_init, HOOK_PRIO_PRE_I2C);
/**
* Handle PS185 HPD changing state.
*/
void ps185_hdmi_hpd_mux_set(void)
{
const int hpd =
gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_ps185_ec_dp_hpd));
if (!corsola_is_dp_muxable(USBC_PORT_C1)) {
return;
}
if (hpd && !(usb_mux_get(USBC_PORT_C1) & USB_PD_MUX_DP_ENABLED)) {
dp_status[USBC_PORT_C1] =
VDO_DP_STATUS(0, /* HPD IRQ ... not applicable */
0, /* HPD level ... not applicable */
0, /* exit DP? ... no */
0, /* usb mode? ... no */
0, /* multi-function ... no */
1, /* DP enabled ... yes */
0, /* power low? ... no */
(!!DP_FLAGS_DP_ON));
/* update C1 virtual mux */
usb_mux_set(USBC_PORT_C1, USB_PD_MUX_DP_ENABLED,
USB_SWITCH_DISCONNECT,
0 /* polarity, don't care */);
CPRINTS("HDMI plug");
}
}
static void ps185_hdmi_hpd_deferred(void)
{
const int hpd =
gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_ps185_ec_dp_hpd));
if (!hpd && (usb_mux_get(USBC_PORT_C1) & USB_PD_MUX_DP_ENABLED)) {
dp_status[USBC_PORT_C1] =
VDO_DP_STATUS(0, /* HPD IRQ ... not applicable */
0, /* HPD level ... not applicable */
0, /* exit DP? ... no */
0, /* usb mode? ... no */
0, /* multi-function ... no */
0, /* DP enabled ... no */
0, /* power low? ... no */
(!DP_FLAGS_DP_ON));
usb_mux_set(USBC_PORT_C1, USB_PD_MUX_NONE,
USB_SWITCH_DISCONNECT,
0 /* polarity, don't care */);
CPRINTS("HDMI unplug");
return;
}
ps185_hdmi_hpd_mux_set();
}
DECLARE_DEFERRED(ps185_hdmi_hpd_deferred);
#define HPD_SINK_ABSENCE_DEBOUNCE (2 * MSEC)
void hdmi_hpd_interrupt(enum gpio_signal signal)
{
const int hpd =
gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_ps185_ec_dp_hpd));
if (!hpd) {
hook_call_deferred(&ps185_hdmi_hpd_deferred_data,
HPD_SINK_ABSENCE_DEBOUNCE);
} else {
hook_call_deferred(&ps185_hdmi_hpd_deferred_data, -1);
}
/* C0 DP is muxed, we should not send HPD to the AP */
if (!corsola_is_dp_muxable(USBC_PORT_C1)) {
if (hpd) {
CPRINTS("C0 port is already muxed.");
}
return;
}
if (hpd && !(usb_mux_get(USBC_PORT_C1) & USB_PD_MUX_DP_ENABLED)) {
/* set dp_aux_path_sel first, and configure the usb_mux in the
* deferred hook to prevent from dead locking.
*/
gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(dp_aux_path_sel), hpd);
hook_call_deferred(&ps185_hdmi_hpd_deferred_data, 0);
}
svdm_set_hpd_gpio(USBC_PORT_C1, hpd);
}
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