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https://github.com/Telecominfraproject/OpenCellular.git
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a4ef740391
Previously usb_charger.c supported only pi3usb9281, but now support for additional parts is required. Move pericom-specific code (including the usb_charger tasks that handles various quirks of that part) to the pi3usb9281 usb_switch driver. Going forward, usb_switch drivers must implement usb_charger_set_switches() and must have some method (such as a task or interrupt handler) to update charge_manager with information about attached chargers. BUG=chrome-os-partner:53363 BRANCH=None TEST=`make buildall -j` Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Change-Id: I4df74e043d8cf2e532d48c39c73b7dc2930f7d3b Reviewed-on: https://chromium-review.googlesource.com/344289 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/* Copyright 2015 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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/*
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* USB charger interface routines. This code assumes that CONFIG_CHARGE_MANAGER
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* is defined and implemented.
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* usb_charger_set_switches() must be implemented by a companion
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* usb_switch driver.
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* In addition, USB switch-specific usb_charger task or interrupt routine
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* is necessary to update charge_manager with detected charger attributes.
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*/
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#include "charge_manager.h"
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#include "common.h"
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "task.h"
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#include "usb_charge.h"
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#include "usb_pd.h"
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static void update_vbus_supplier(int port, int vbus_level)
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{
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struct charge_port_info charge;
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/*
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* If VBUS is low, or VBUS is high and we are not outputting VBUS
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* ourselves, then update the VBUS supplier.
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*/
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if (!vbus_level || !usb_charger_port_is_sourcing_vbus(port)) {
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charge.voltage = USB_CHARGER_VOLTAGE_MV;
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charge.current = vbus_level ? USB_CHARGER_MIN_CURR_MA : 0;
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charge_manager_update_charge(CHARGE_SUPPLIER_VBUS,
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port,
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&charge);
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}
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}
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int usb_charger_port_is_sourcing_vbus(int port)
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{
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if (port == 0)
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return gpio_get_level(GPIO_USB_C0_5V_EN);
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#if CONFIG_USB_PD_PORT_COUNT >= 2
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else if (port == 1)
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return gpio_get_level(GPIO_USB_C1_5V_EN);
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#endif
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/* Not a valid port */
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return 0;
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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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/* If VBUS has transitioned low, notify PD module directly */
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pd_vbus_low(port);
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/* Update VBUS supplier and signal VBUS change to USB_CHG task */
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update_vbus_supplier(port, vbus_level);
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#if CONFIG_USB_PD_PORT_COUNT == 2
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task_set_event(port ? TASK_ID_USB_CHG_P1 : TASK_ID_USB_CHG_P0,
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USB_CHG_EVENT_VBUS, 0);
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#else
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task_set_event(TASK_ID_USB_CHG_P0, USB_CHG_EVENT_VBUS, 0);
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#endif
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}
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static void usb_charger_init(void)
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{
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int i;
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struct charge_port_info charge_none;
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/* Initialize all pericom charge suppliers to 0 */
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charge_none.voltage = USB_CHARGER_VOLTAGE_MV;
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charge_none.current = 0;
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for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
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charge_manager_update_charge(CHARGE_SUPPLIER_PROPRIETARY,
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i,
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&charge_none);
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charge_manager_update_charge(CHARGE_SUPPLIER_BC12_CDP,
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i,
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&charge_none);
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charge_manager_update_charge(CHARGE_SUPPLIER_BC12_DCP,
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i,
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&charge_none);
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charge_manager_update_charge(CHARGE_SUPPLIER_BC12_SDP,
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i,
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&charge_none);
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charge_manager_update_charge(CHARGE_SUPPLIER_OTHER,
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i,
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&charge_none);
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#ifndef CONFIG_USB_PD_TCPM_VBUS
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/* Initialize VBUS supplier based on whether VBUS is present */
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update_vbus_supplier(i, pd_snk_is_vbus_provided(i));
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#endif
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}
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}
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DECLARE_HOOK(HOOK_INIT, usb_charger_init, HOOK_PRIO_DEFAULT);
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