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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.
*/
/* Shared USB-C policy for Zork boards */
#include "charge_manager.h"
#include "chipset.h"
#include "common.h"
#include "compile_time_macros.h"
#include "console.h"
#include "ec_commands.h"
#include "gpio.h"
#include "system.h"
#include "usb_mux.h"
#include "usb_pd.h"
#include "usbc_ppc.h"
#include "util.h"
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
int pd_check_vconn_swap(int port)
{
/* in G3, do not allow vconn swap since 5V rail is off */
return gpio_get_level(GPIO_S5_PGOOD);
}
void pd_power_supply_reset(int port)
{
int prev_en;
prev_en = ppc_is_sourcing_vbus(port);
/* Disable VBUS. */
ppc_vbus_source_enable(port, 0);
/* Enable discharge if we were previously sourcing 5V */
if (prev_en)
pd_set_vbus_discharge(port, 1);
#ifdef CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT
/* Give back the current quota we are no longer using */
charge_manager_source_port(port, 0);
#endif /* defined(CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT) */
/* Notify host of power info change. */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
}
int pd_set_power_supply_ready(int port)
{
int rv;
/* Disable charging. */
rv = ppc_vbus_sink_enable(port, 0);
if (rv)
return rv;
pd_set_vbus_discharge(port, 0);
/* Provide Vbus. */
rv = ppc_vbus_source_enable(port, 1);
if (rv)
return rv;
#ifdef CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT
/* Ensure we advertise the proper available current quota */
charge_manager_source_port(port, 1);
#endif /* defined(CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT) */
/* Notify host of power info change. */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
return EC_SUCCESS;
}
int pd_snk_is_vbus_provided(int port)
{
return ppc_is_vbus_present(port);
}
int board_vbus_source_enabled(int port)
{
return ppc_is_sourcing_vbus(port);
}
/* ----------------- Vendor Defined Messages ------------------ */
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
mux_state_t svdm_dp_mux_mode(int port)
{
int mf_pref = PD_VDO_DPSTS_MF_PREF(dp_status[port]);
int pin_mode = pd_dfp_dp_get_pin_mode(port, dp_status[port]);
/*
* Multi-function operation is only allowed if that pin config is
* supported.
*/
if ((pin_mode & MODE_DP_PIN_MF_MASK) && mf_pref)
return USB_PD_MUX_DOCK;
else
return USB_PD_MUX_DP_ENABLED;
}
__override int svdm_dp_config(int port, uint32_t *payload)
{
int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT);
int mf_pref = PD_VDO_DPSTS_MF_PREF(dp_status[port]);
int pin_mode = pd_dfp_dp_get_pin_mode(port, dp_status[port]);
mux_state_t mux_mode = svdm_dp_mux_mode(port);
if (!pin_mode)
return 0;
CPRINTS("pin_mode: %x, mf: %d, mux: %d", pin_mode, mf_pref, mux_mode);
/*
* Place the USB Type-C pins that are to be re-configured to DisplayPort
* Configuration into the Safe state. For USB_PD_MUX_DOCK, the
* superspeed signals can remain connected. For USB_PD_MUX_DP_ENABLED,
* disconnect the superspeed signals here, before the pins are
* re-configured to DisplayPort (in svdm_dp_post_config, when we receive
* the config ack).
*/
if (mux_mode == USB_PD_MUX_DP_ENABLED)
usb_mux_set(port, USB_PD_MUX_NONE, USB_SWITCH_CONNECT,
pd_get_polarity(port));
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)
{
/* Connect the SBU and USB lines to the connector. */
ppc_set_sbu(port, 1);
usb_mux_set(port, svdm_dp_mux_mode(port), USB_SWITCH_CONNECT,
pd_get_polarity(port));
dp_flags[port] |= DP_FLAGS_DP_ON;
if (!(dp_flags[port] & DP_FLAGS_HPD_HI_PENDING))
return;
gpio_set_level(PORT_TO_HPD(port), 1);
/* set the minimum time delay (2ms) for the next HPD IRQ */
svdm_hpd_deadline[port] = get_time().val + HPD_USTREAM_DEBOUNCE_LVL;
usb_mux_hpd_update(port, 1, 0);
}
__override void svdm_exit_dp_mode(int port)
{
dp_flags[port] = 0;
dp_status[port] = 0;
usb_mux_set(port, USB_PD_MUX_NONE, USB_SWITCH_CONNECT,
pd_get_polarity(port));
gpio_set_level(PORT_TO_HPD(port), 0);
usb_mux_hpd_update(port, 0, 0);
}
#endif /* CONFIG_USB_PD_ALT_MODE_DFP */
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