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d54387c18e
If an HPD IRQ event is seen, make note of it and keep the status set until informing the host. BUG=chrome-os-partner:55925 BRANCH=None TEST=Manual on kevin, trigger HPD event, verify that event bit is set in reply to first host command and not subsequent host commands. Change-Id: I0900a683dcb344d5d4d03a1fa6e3d8de913597b2 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/366990 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Chris Zhong <zyw@rock-chips.com> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* Copyright 2016 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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* Virtual USB mux driver for host-controlled USB muxes.
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*/
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#include "common.h"
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#include "console.h"
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#include "host_command.h"
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#include "usb_mux.h"
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#include "util.h"
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static mux_state_t virtual_mux_state[CONFIG_USB_PD_PORT_COUNT];
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static int hpd_irq_state[CONFIG_USB_PD_PORT_COUNT];
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static int virtual_init(int port)
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{
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return EC_SUCCESS;
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}
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/*
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* Set the state of our 'virtual' mux. The EC does not actually control this
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* mux, so update the desired state, then notify the host of the update.
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*/
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static int virtual_set_mux(int port, mux_state_t mux_state)
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{
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if (virtual_mux_state[port] != mux_state) {
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virtual_mux_state[port] = mux_state;
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host_set_single_event(EC_HOST_EVENT_USB_MUX);
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}
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return EC_SUCCESS;
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}
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/*
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* Get the state of our 'virtual' mux. Since we the EC does not actually
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* control this mux, and the EC has no way of knowing its actual status,
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* we return the desired state here.
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*/
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static int virtual_get_mux(int port, mux_state_t *mux_state)
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{
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*mux_state = virtual_mux_state[port];
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*mux_state |= hpd_irq_state[port] ? USB_PD_MUX_HPD_IRQ : 0;
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return EC_SUCCESS;
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}
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void virtual_hpd_update(int port, int hpd_lvl, int hpd_irq)
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{
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hpd_irq_state[port] = hpd_irq;
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if (hpd_irq)
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host_set_single_event(EC_HOST_EVENT_USB_MUX);
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}
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const struct usb_mux_driver virtual_usb_mux_driver = {
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.init = virtual_init,
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.set = virtual_set_mux,
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.get = virtual_get_mux,
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};
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