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If override charge is selected on a port currently acting as a charge source, but the attached device is also capable of acting as a source, request a charge role swap and initiate a pending delayed port override. If the role swap completes successfully and a charge source is found, the selected port will become the override port. If the role swap fails or no charge source is found within 2 seconds, the delayed port override will be lost. BUG=chrome-os-partner:28343,chrome-os-partner:31195 TEST=Manual on Samus. Connect two Samus units together through charge ports. "pd 1 swap power" - put port on test device into source role "chgoverride 1" - set charge override, verify that role swap takes effect and charge manager selects PD charge source, 900mA @ 5V Disconnect charge cable, verify that charge manager goes back to not charging. BRANCH=Samus Change-Id: Iadcc4dc98631661f254245eeff18973df517f652 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/231900 Reviewed-by: Alec Berg <alecaberg@chromium.org>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/* Copyright (c) 2014 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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#ifndef __CHARGE_MANAGER_H
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#define __CHARGE_MANAGER_H
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/* Charge port that indicates no active port */
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#define CHARGE_SUPPLIER_NONE -1
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#define CHARGE_PORT_NONE -1
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#define CHARGE_CEIL_NONE -1
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/* Initial charge state */
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#define CHARGE_CURRENT_UNINITIALIZED -1
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#define CHARGE_VOLTAGE_UNINITIALIZED -1
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/* Charge tasks report available current and voltage */
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struct charge_port_info {
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int current;
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int voltage;
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};
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/* Called by charging tasks to update their available charge */
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void charge_manager_update(int supplier,
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int charge_port,
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struct charge_port_info *charge);
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/* Update charge ceiling for a given port */
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void charge_manager_set_ceil(int port, int ceil);
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/* Select an 'override port', which is always the preferred charge port */
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int charge_manager_set_override(int port);
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/* Returns the current active charge port, as determined by charge manager */
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int charge_manager_get_active_charge_port(void);
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/* Board-level callback, called on delayed override timeout */
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void board_charge_manager_override_timeout(void);
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#endif /* __CHARGE_MANAGER_H */
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