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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 Volteer boards */
#include "charge_manager.h"
#include "chipset.h"
#include "compile_time_macros.h"
#include "console.h"
#include "gpio.h"
#include "usb_common.h"
#include "usb_mux.h"
#include "usbc_ppc.h"
#include "usb_pd.h"
#include "system.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)
{
/* Only allow vconn swap if pp5000_A rail is enabled */
return gpio_get_level(GPIO_EN_PP5000_A);
}
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);
/* 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;
/* Notify host of power info change. */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
return EC_SUCCESS;
}
#ifdef CONFIG_USB_PD_VBUS_DETECT_PPC
int pd_snk_is_vbus_provided(int port)
{
return ppc_is_vbus_present(port);
}
#endif /* defined(CONFIG_USB_PD_VBUS_DETECT_PPC) */
int board_vbus_source_enabled(int port)
{
return ppc_is_sourcing_vbus(port);
}
/* ----------------- Vendor Defined Messages ------------------ */
/* Responses specifically for the enablement of TBT mode in the role of UFP */
#define OPOS_TBT 1
static const union tbt_mode_resp_device vdo_tbt_modes[1] = {
{
.tbt_alt_mode = 0x0001,
.tbt_adapter = TBT_ADAPTER_TBT3,
.intel_spec_b0 = 0,
.vendor_spec_b0 = 0,
.vendor_spec_b1 = 0,
}
};
static const uint32_t vdo_idh = VDO_IDH(
1, /* Data caps as USB host */
0, /* Not a USB device */
IDH_PTYPE_PERIPH,
1, /* Supports alt modes */
USB_VID_GOOGLE);
static const uint32_t vdo_idh_rev30 = VDO_IDH_REV30(
1, /* Data caps as USB host */
0, /* Not a USB device */
IDH_PTYPE_PERIPH,
1, /* Supports alt modes */
IDH_PTYPE_DFP_HOST,
USB_TYPEC_RECEPTACLE,
USB_VID_GOOGLE);
static const uint32_t vdo_product = VDO_PRODUCT(
CONFIG_USB_PID, CONFIG_USB_BCD_DEV);
/* TODO(b/168890624): add USB4 to capability once USB4 response implemented */
static const uint32_t vdo_ufp1 = VDO_UFP1(
(VDO_UFP1_CAPABILITY_USB20
| VDO_UFP1_CAPABILITY_USB32),
USB_TYPEC_RECEPTACLE,
VDO_UFP1_ALT_MODE_TBT3,
USB_R30_SS_U40_GEN3);
static const uint32_t vdo_dfp = VDO_DFP(
(VDO_DFP_HOST_CAPABILITY_USB20
| VDO_DFP_HOST_CAPABILITY_USB32
| VDO_DFP_HOST_CAPABILITY_USB4),
USB_TYPEC_RECEPTACLE,
1 /* Port 1 */);
static int svdm_tbt_compat_response_identity(int port, uint32_t *payload)
{
/* TODO(b/154962766): Get an XID */
payload[VDO_I(CSTAT)] = VDO_CSTAT(0);
payload[VDO_I(PRODUCT)] = vdo_product;
if (pd_get_rev(port, TCPCI_MSG_SOP) == PD_REV30) {
/* PD Revision 3.0 */
payload[VDO_I(IDH)] = vdo_idh_rev30;
payload[VDO_I(PTYPE_UFP1_VDO)] = vdo_ufp1;
/* TODO(b/156749387): Find power number for USB3/4 */
payload[VDO_I(PTYPE_UFP2_VDO)] = 0;
payload[VDO_I(PTYPE_DFP_VDO)] = vdo_dfp;
return VDO_I(PTYPE_DFP_VDO) + 1;
}
/* PD Revision 2.0 */
payload[VDO_I(IDH)] = vdo_idh;
return VDO_I(PRODUCT) + 1;
}
static int svdm_tbt_compat_response_svids(int port, uint32_t *payload)
{
payload[1] = VDO_SVID(USB_VID_INTEL, 0);
return 2;
}
static int svdm_tbt_compat_response_modes(int port, uint32_t *payload)
{
if (PD_VDO_VID(payload[0]) == USB_VID_INTEL) {
memcpy(payload + 1, vdo_tbt_modes, sizeof(vdo_tbt_modes));
return ARRAY_SIZE(vdo_tbt_modes) + 1;
} else {
return 0; /* NAK */
}
}
static int svdm_tbt_compat_response_enter_mode(
int port, uint32_t *payload)
{
mux_state_t mux_state = 0;
/* Do not enter mode while CPU is off. */
if (chipset_in_or_transitioning_to_state(CHIPSET_STATE_ANY_OFF))
return 0; /* NAK */
if ((PD_VDO_VID(payload[0]) != USB_VID_INTEL) ||
(PD_VDO_OPOS(payload[0]) != OPOS_TBT))
return 0; /* NAK */
mux_state = usb_mux_get(port);
/*
* Ref: USB PD 3.0 Spec figure 6-21 Successful Enter Mode sequence
* UFP (responder) should be in USB mode or safe mode before sending
* Enter Mode Command response.
*/
if ((mux_state & USB_PD_MUX_USB_ENABLED) ||
(mux_state & USB_PD_MUX_SAFE_MODE)) {
pd_ufp_set_enter_mode(port, payload);
set_tbt_compat_mode_ready(port);
CPRINTS("UFP Enter TBT mode");
return 1; /* ACK */
}
CPRINTS("UFP failed to enter TBT mode(mux=0x%x)", mux_state);
return 0;
}
const struct svdm_response svdm_rsp = {
.identity = &svdm_tbt_compat_response_identity,
.svids = &svdm_tbt_compat_response_svids,
.modes = &svdm_tbt_compat_response_modes,
.enter_mode = &svdm_tbt_compat_response_enter_mode,
.amode = NULL,
.exit_mode = NULL,
};
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