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b87fe062ec
The decision on whether to ramp (and how high) depends on the quirks of charger identification, so move the decision out of board, into the drivers that implement usb_charger. Also, rename CONFIG_CHARGE_RAMP to CONFIG_CHARGE_RAMP_SW, to better contrast with the existing CONFIG_CHARGE_RAMP_HW. BUG=None TEST=Manual on kevin, verify ramp occurs when port plugged into Z840 workstation. BRANCH=None Change-Id: I5b395274133837a18a4f4ac34b59b623287be175 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/702681 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* USB charging control module for Chrome EC */
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#ifndef __CROS_EC_USB_CHARGE_H
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#define __CROS_EC_USB_CHARGE_H
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#include "common.h"
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/* USB charger voltage */
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#define USB_CHARGER_VOLTAGE_MV 5000
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/* USB charger minimum current */
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#define USB_CHARGER_MIN_CURR_MA 500
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enum usb_charge_mode {
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/* Disable USB port. */
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USB_CHARGE_MODE_DISABLED,
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/* Set USB port to Standard Downstream Port, USB 2.0 mode. */
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USB_CHARGE_MODE_SDP2,
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/* Set USB port to Charging Downstream Port, BC 1.2. */
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USB_CHARGE_MODE_CDP,
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/* Set USB port to Dedicated Charging Port, BC 1.2. */
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USB_CHARGE_MODE_DCP_SHORT,
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/* Enable USB port (for dumb ports). */
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USB_CHARGE_MODE_ENABLED,
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USB_CHARGE_MODE_COUNT
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};
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/**
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* Set USB charge mode for the port.
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*
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* @param usb_port_id Port to set.
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* @param mode New mode for port.
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* @return EC_SUCCESS, or non-zero if error.
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*/
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int usb_charge_set_mode(int usb_port_id, enum usb_charge_mode mode);
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#ifdef HAS_TASK_USB_CHG_P0
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#define USB_CHG_EVENT_BC12 TASK_EVENT_CUSTOM(1)
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#define USB_CHG_EVENT_VBUS TASK_EVENT_CUSTOM(2)
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#define USB_CHG_EVENT_INTR TASK_EVENT_CUSTOM(4)
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#endif
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/*
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* Define USB_CHG_PORT_TO_TASK_ID() and TASK_ID_TO_USB_CHG__PORT() macros to
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* go between USB_CHG port number and task ID. Assume that TASK_ID_USB_CHG_P0,
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* is the lowest task ID and IDs are on a continuous range.
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*/
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#ifdef HAS_TASK_USB_CHG_P0
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#define USB_CHG_PORT_TO_TASK_ID(port) (TASK_ID_USB_CHG_P0 + (port))
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#define TASK_ID_TO_USB_CHG_PORT(id) ((id) - TASK_ID_USB_CHG_P0)
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#else
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#define USB_CHG_PORT_TO_TASK_ID(port) -1 /* dummy task ID */
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#define TASK_ID_TO_USB_CHG_PORT(id) 0
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#endif /* HAS_TASK_USB_CHG_P0 */
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/**
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* Returns true if the passed port is a power source.
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*
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* @param port Port number.
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* @return True if port is sourcing vbus.
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*/
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int usb_charger_port_is_sourcing_vbus(int port);
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enum usb_switch {
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USB_SWITCH_CONNECT,
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USB_SWITCH_DISCONNECT,
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USB_SWITCH_RESTORE,
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};
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/**
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* Configure USB data switches on type-C port.
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*
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* @param port port number.
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* @param setting new switch setting to configure.
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*/
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void usb_charger_set_switches(int port, enum usb_switch setting);
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/**
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* Notify USB_CHG task that VBUS level has changed.
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*
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* @param port port number.
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* @param vbus_level new VBUS level
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*/
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void usb_charger_vbus_change(int port, int vbus_level);
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/**
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* Check if ramping is allowed for given supplier
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*
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* @supplier Supplier to check
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*
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* @return Ramping is allowed for given supplier
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*/
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int usb_charger_ramp_allowed(int supplier);
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/**
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* Get the maximum current limit that we are allowed to ramp to
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*
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* @supplier Active supplier type
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* @sup_curr Input current limit based on supplier
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*
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* @return Maximum current in mA
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*/
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int usb_charger_ramp_max(int supplier, int sup_curr);
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#endif /* __CROS_EC_USB_CHARGE_H */
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