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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "charge_manager.h"
#include "chipset.h"
#include "console.h"
#include "gpio.h"
#include "system.h"
#include "usb_mux.h"
#include "usbc_ppc.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
int pd_check_vconn_swap(int port)
{
/* In G3, do not allow vconn swap since PP5000 rail is off */
return gpio_get_level(GPIO_EN_PP5000);
}
static uint8_t vbus_en[CONFIG_USB_PD_PORT_MAX_COUNT];
#if CONFIG_USB_PD_PORT_MAX_COUNT == 1
static uint8_t vbus_rp[CONFIG_USB_PD_PORT_MAX_COUNT] = {TYPEC_RP_1A5};
#else
static uint8_t vbus_rp[CONFIG_USB_PD_PORT_MAX_COUNT] = {TYPEC_RP_1A5,
TYPEC_RP_1A5};
#endif
static void board_vbus_update_source_current(int port)
{
/* Both port are controlled by PPC SN5S330. */
ppc_set_vbus_source_current_limit(port, vbus_rp[port]);
ppc_vbus_source_enable(port, vbus_en[port]);
}
void pd_power_supply_reset(int port)
{
int prev_en;
prev_en = vbus_en[port];
/* Disable VBUS */
vbus_en[port] = 0;
board_vbus_update_source_current(port);
/* Enable discharge if we were previously sourcing 5V */
if (prev_en)
pd_set_vbus_discharge(port, 1);
/* notify host of power info change */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
}
int pd_set_power_supply_ready(int port)
{
/* Disable charging */
board_vbus_sink_enable(port, 0);
pd_set_vbus_discharge(port, 0);
/* Provide VBUS */
vbus_en[port] = 1;
board_vbus_update_source_current(port);
/* notify host of power info change */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
return EC_SUCCESS; /* we are ready */
}
int board_vbus_source_enabled(int port)
{
return vbus_en[port];
}
__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp)
{
vbus_rp[port] = rp;
board_vbus_update_source_current(port);
}
int pd_snk_is_vbus_provided(int port)
{
return tcpm_check_vbus_level(port, VBUS_PRESENT);
}
/* ----------------- Vendor Defined Messages ------------------ */
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
__override int svdm_dp_config(int port, uint32_t *payload)
{
int opos = pd_alt_mode(port, TCPCI_MSG_SOP, USB_SID_DISPLAYPORT);
uint8_t pin_mode = get_dp_pin_mode(port);
if (!pin_mode)
return 0;
/*
* Defer setting the usb_mux until HPD goes high, svdm_dp_attention().
* The AP only supports one DP phy. An external DP mux switches between
* the two ports. Should switch those muxes when it is really used,
* i.e. HPD high; otherwise, the real use case is preempted, like:
* (1) plug a dongle without monitor connected to port-0,
* (2) plug a dongle without monitor connected to port-1,
* (3) plug a monitor to the port-1 dongle.
*/
payload[0] = VDO(USB_SID_DISPLAYPORT, 1,
CMD_DP_CONFIG | VDO_OPOS(opos));
payload[1] = VDO_DP_CFG(pin_mode, /* pin mode */
1, /* DPv1.3 signaling */
2); /* UFP connected */
return 2;
};
__override void svdm_dp_post_config(int port)
{
dp_flags[port] |= DP_FLAGS_DP_ON;
}
/**
* Is the port fine to be muxed its DisplayPort lines?
*
* Only one port can be muxed to DisplayPort at a time.
*
* @param port Port number of TCPC.
* @return 1 is fine; 0 is bad as other port is already muxed;
*/
static int is_dp_muxable(int port)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++)
if (i != port) {
if (usb_mux_get(i) & USB_PD_MUX_DP_ENABLED)
return 0;
}
return 1;
}
__override int svdm_dp_attention(int port, uint32_t *payload)
{
enum gpio_signal hpd = GPIO_DP_HOT_PLUG_DET;
int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
int cur_lvl = gpio_get_level(hpd);
mux_state_t mux_state;
dp_status[port] = payload[1];
if (!is_dp_muxable(port)) {
/* TODO(waihong): Info user? */
CPRINTS("p%d: The other port is already muxed.", port);
return 0;
}
/*
* Initial implementation to handle HPD. Only the first-plugged port
* works, i.e. sending HPD signal to AP. The second-plugged port
* will be ignored.
*
* TODO(waihong): Continue the above case, if the first-plugged port
* is then unplugged, switch to the second-plugged port and signal AP?
*/
if (lvl) {
/*
* Enable and switch the DP port selection mux to the
* correct port.
*
* TODO(waihong): Better to move switching DP mux to
* the usb_mux abstraction.
*/
gpio_set_level(GPIO_DP_MUX_SEL, port == 1);
gpio_set_level(GPIO_DP_MUX_OE_L, 0);
/* Connect the SBU lines in PPC chip. */
if (IS_ENABLED(CONFIG_USBC_PPC_SBU))
ppc_set_sbu(port, 1);
/*
* Connect the USB SS/DP lines in TCPC chip.
*
* When mf_pref not true, still use the dock muxing
* because of the board USB-C topology (limited to 2
* lanes DP).
*/
usb_mux_set(port, USB_PD_MUX_DOCK,
USB_SWITCH_CONNECT,
polarity_rm_dts(pd_get_polarity(port)));
} else {
/* Disconnect the DP port selection mux. */
gpio_set_level(GPIO_DP_MUX_OE_L, 1);
gpio_set_level(GPIO_DP_MUX_SEL, 0);
/* Disconnect the SBU lines in PPC chip. */
if (IS_ENABLED(CONFIG_USBC_PPC_SBU))
ppc_set_sbu(port, 0);
/* Disconnect the DP but keep the USB SS lines in TCPC chip. */
usb_mux_set(port, USB_PD_MUX_USB_ENABLED,
USB_SWITCH_CONNECT,
polarity_rm_dts(pd_get_polarity(port)));
}
if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) &&
(irq || lvl))
/*
* Wake up the AP. IRQ or level high indicates a DP sink is now
* present.
*/
pd_notify_dp_alt_mode_entry(port);
/* Configure TCPC for the HPD event, for proper muxing */
mux_state = (lvl ? USB_PD_MUX_HPD_LVL : USB_PD_MUX_HPD_LVL_DEASSERTED) |
(irq ? USB_PD_MUX_HPD_IRQ : USB_PD_MUX_HPD_IRQ_DEASSERTED);
usb_mux_hpd_update(port, mux_state);
/* Signal AP for the HPD event, through GPIO to AP */
if (irq & cur_lvl) {
uint64_t now = get_time().val;
/* Wait for the minimum spacing between IRQ_HPD if needed */
if (now < svdm_hpd_deadline[port])
usleep(svdm_hpd_deadline[port] - now);
/* Generate IRQ_HPD pulse */
gpio_set_level(hpd, 0);
usleep(HPD_DSTREAM_DEBOUNCE_IRQ);
gpio_set_level(hpd, 1);
/* Set the minimum time delay (2ms) for the next HPD IRQ */
svdm_hpd_deadline[port] = get_time().val +
HPD_USTREAM_DEBOUNCE_LVL;
} else if (irq & !lvl) {
CPRINTF("ERR:HPD:IRQ&LOW\n");
return 0;
} else {
gpio_set_level(hpd, lvl);
/* Set the minimum time delay (2ms) for the next HPD IRQ */
svdm_hpd_deadline[port] = get_time().val +
HPD_USTREAM_DEBOUNCE_LVL;
}
return 1;
}
__override void svdm_exit_dp_mode(int port)
{
if (is_dp_muxable(port)) {
/* Disconnect the DP port selection mux. */
gpio_set_level(GPIO_DP_MUX_OE_L, 1);
gpio_set_level(GPIO_DP_MUX_SEL, 0);
/* Signal AP for the HPD low event */
usb_mux_hpd_update(port, USB_PD_MUX_HPD_LVL_DEASSERTED |
USB_PD_MUX_HPD_IRQ_DEASSERTED);
gpio_set_level(GPIO_DP_HOT_PLUG_DET, 0);
}
}
#endif /* CONFIG_USB_PD_ALT_MODE_DFP */
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