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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Nissa sub-board hardware configuration */
#include "cros_board_info.h"
#include "driver/tcpm/tcpci.h"
#include "gpio/gpio_int.h"
#include "hooks.h"
#include "nissa_common.h"
#include "nissa_hdmi.h"
#include "task.h"
#include "usb_charge.h"
#include "usb_pd.h"
#include "usbc/usb_muxes.h"
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
#include <ap_power/ap_power.h>
LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
#if NISSA_BOARD_HAS_HDMI_SUPPORT
static void hdmi_power_handler(struct ap_power_ev_callback *cb,
struct ap_power_ev_data data)
{
/* Enable VCC on the HDMI port. */
const struct gpio_dt_spec *s3_rail =
GPIO_DT_FROM_ALIAS(gpio_hdmi_en_odl);
/* Connect AP's DDC to sub-board (default is USB-C aux) */
const struct gpio_dt_spec *ddc_select =
GPIO_DT_FROM_NODELABEL(gpio_hdmi_sel);
switch (data.event) {
case AP_POWER_PRE_INIT:
LOG_DBG("Connecting HDMI DDC to sub-board");
gpio_pin_set_dt(ddc_select, 1);
break;
case AP_POWER_STARTUP:
LOG_DBG("Enabling HDMI VCC");
gpio_pin_set_dt(s3_rail, 1);
break;
case AP_POWER_SHUTDOWN:
LOG_DBG("Disabling HDMI VCC");
gpio_pin_set_dt(s3_rail, 0);
break;
case AP_POWER_HARD_OFF:
LOG_DBG("Disconnecting HDMI sub-board DDC");
gpio_pin_set_dt(ddc_select, 0);
break;
default:
LOG_ERR("Unhandled HDMI power event %d", data.event);
break;
}
}
static void hdmi_hpd_interrupt(const struct device *device,
struct gpio_callback *callback,
gpio_port_pins_t pins)
{
int state = gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_hpd_odl));
gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_ec_soc_hdmi_hpd), state);
LOG_DBG("HDMI HPD changed state to %d", state);
}
void nissa_configure_hdmi_rails(void)
{
#if DT_NODE_EXISTS(GPIO_DT_FROM_ALIAS(gpio_en_rails_odl))
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_rails_odl),
GPIO_OUTPUT_INACTIVE | GPIO_OPEN_DRAIN |
GPIO_PULL_UP | GPIO_ACTIVE_LOW);
#endif
}
void nissa_configure_hdmi_vcc(void)
{
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_hdmi_en_odl),
GPIO_OUTPUT_INACTIVE | GPIO_OPEN_DRAIN |
GPIO_ACTIVE_LOW);
}
__overridable void nissa_configure_hdmi_power_gpios(void)
{
nissa_configure_hdmi_rails();
}
#ifdef CONFIG_SOC_IT8XXX2
/*
* On it8xxx2, the below condition will break the EC to enter deep doze mode
* (b:237717730):
* Enhance i2c (GPE0/E7, GPH1/GPH2 or GPA4/GPA5) is enabled and its clock and
* data pins aren't both at high level.
*
* Since HDMI+type A SKU doesn't use i2c4, disable it for better power number.
*/
#define I2C4_NODE DT_NODELABEL(i2c4)
#if DT_NODE_EXISTS(I2C4_NODE)
PINCTRL_DT_DEFINE(I2C4_NODE);
/* disable i2c4 alternate function */
static void soc_it8xxx2_disable_i2c4_alt(void)
{
const struct pinctrl_dev_config *pcfg =
PINCTRL_DT_DEV_CONFIG_GET(I2C4_NODE);
pinctrl_apply_state(pcfg, PINCTRL_STATE_SLEEP);
}
#endif /* DT_NODE_EXISTS(I2C4_NODE) */
#endif /* CONFIG_SOC_IT8XXX2 */
#endif /* NISSA_BOARD_HAS_HDMI_SUPPORT */
static void lte_power_handler(struct ap_power_ev_callback *cb,
struct ap_power_ev_data data)
{
/* Enable rails for S5 */
const struct gpio_dt_spec *s5_rail =
GPIO_DT_FROM_ALIAS(gpio_en_sub_s5_rails);
switch (data.event) {
case AP_POWER_PRE_INIT:
LOG_DBG("Enabling LTE sub-board power rails");
gpio_pin_set_dt(s5_rail, 1);
break;
case AP_POWER_HARD_OFF:
LOG_DBG("Disabling LTE sub-board power rails");
gpio_pin_set_dt(s5_rail, 0);
break;
default:
LOG_ERR("Unhandled LTE power event %d", data.event);
break;
}
}
/**
* Configure GPIOs (and other pin functions) that vary with present sub-board.
*
* The functions of some pins vary according to which sub-board is present
* (indicated by CBI fw_config); this function configures them according to the
* needs of the present sub-board.
*/
static void nereid_subboard_config(void)
{
enum nissa_sub_board_type sb = nissa_get_sb_type();
static struct ap_power_ev_callback power_cb;
/*
* USB-A port: current limit output is configured by default and unused
* if this port is not present. VBUS enable must be configured if
* needed and is controlled by the usba-port-enable-pins driver.
*/
if (sb == NISSA_SB_C_A || sb == NISSA_SB_HDMI_A ||
sb == NISSA_SB_NONE) {
/*
* Configure VBUS enable, retaining current value.
* SB_NONE indicates missing fw_config; it's safe to enable VBUS
* control in this case since all that will happen is we turn
* off power to LTE, and it's useful to allow USB-A to work in
* such a configuration.
*/
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_usb_a1_vbus),
GPIO_OUTPUT);
} else {
/* Turn off unused pins */
gpio_pin_configure_dt(
GPIO_DT_FROM_NODELABEL(gpio_sub_usb_a1_ilimit_sdp),
GPIO_DISCONNECTED);
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_usb_a1_vbus),
GPIO_DISCONNECTED);
/* Disable second USB-A port enable GPIO */
__ASSERT(USB_PORT_ENABLE_COUNT == 2,
"USB A port count != 2 (%d)", USB_PORT_ENABLE_COUNT);
usb_port_enable[1] = -1;
}
/*
* USB-C port: the default configuration has I2C on the I2C pins,
* but the interrupt line needs to be configured.
*/
#if CONFIG_USB_PD_PORT_MAX_COUNT > 1
if (sb == NISSA_SB_C_A || sb == NISSA_SB_C_LTE) {
/* Configure interrupt input */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl),
GPIO_INPUT | GPIO_PULL_UP);
} else {
/* Port doesn't exist, doesn't need muxing */
USB_MUX_ENABLE_ALTERNATIVE(usb_mux_chain_1_no_mux);
}
#endif
switch (sb) {
#if NISSA_BOARD_HAS_HDMI_SUPPORT
case NISSA_SB_HDMI_A: {
/*
* HDMI: two outputs control power which must be configured to
* non-default settings, and HPD must be forwarded to the AP
* on another output pin.
*/
const struct gpio_dt_spec *hpd_gpio =
GPIO_DT_FROM_ALIAS(gpio_hpd_odl);
static struct gpio_callback hdmi_hpd_cb;
int rv, irq_key;
nissa_configure_hdmi_power_gpios();
#if CONFIG_SOC_IT8XXX2 && DT_NODE_EXISTS(I2C4_NODE)
/* disable i2c4 alternate function for better power number */
soc_it8xxx2_disable_i2c4_alt();
#endif
/*
* Control HDMI power according to AP power state. Some events
* won't do anything if the corresponding pin isn't configured,
* but that's okay.
*/
ap_power_ev_init_callback(
&power_cb, hdmi_power_handler,
AP_POWER_PRE_INIT | AP_POWER_HARD_OFF |
AP_POWER_STARTUP | AP_POWER_SHUTDOWN);
ap_power_ev_add_callback(&power_cb);
/*
* Configure HPD input from sub-board; it's inverted by a buffer
* on the sub-board.
*/
gpio_pin_configure_dt(hpd_gpio, GPIO_INPUT | GPIO_ACTIVE_LOW);
/* Register interrupt handler for HPD changes */
gpio_init_callback(&hdmi_hpd_cb, hdmi_hpd_interrupt,
BIT(hpd_gpio->pin));
gpio_add_callback(hpd_gpio->port, &hdmi_hpd_cb);
rv = gpio_pin_interrupt_configure_dt(hpd_gpio,
GPIO_INT_EDGE_BOTH);
__ASSERT(rv == 0,
"HPD interrupt configuration returned error %d", rv);
/*
* Run the HPD handler once to ensure output is in sync.
* Lock interrupts to ensure that we don't cause desync if an
* HPD interrupt comes in between the internal read of the input
* and write to the output.
*/
irq_key = irq_lock();
hdmi_hpd_interrupt(hpd_gpio->port, &hdmi_hpd_cb,
BIT(hpd_gpio->pin));
irq_unlock(irq_key);
break;
}
#endif
case NISSA_SB_C_LTE:
/*
* LTE: Set up callbacks for enabling/disabling
* sub-board power on S5 state.
*/
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_sub_s5_rails),
GPIO_OUTPUT_INACTIVE);
/* Control LTE power when CPU entering or
* exiting S5 state.
*/
ap_power_ev_init_callback(&power_cb, lte_power_handler,
AP_POWER_HARD_OFF |
AP_POWER_PRE_INIT);
ap_power_ev_add_callback(&power_cb);
break;
default:
break;
}
}
DECLARE_HOOK(HOOK_INIT, nereid_subboard_config, HOOK_PRIO_POST_FIRST);
/*
* Enable interrupts
*/
static void board_init(void)
{
/*
* Enable USB-C interrupts.
*/
gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c0));
#if CONFIG_USB_PD_PORT_MAX_COUNT > 1
if (board_get_usb_pd_port_count() == 2)
gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c1));
#endif
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
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