76e40714f4
Bug: 139103008 Change-Id: Ie476dfdf90e18771f86050f331bfa147339d229a Signed-off-by: Super Liu <supercjliu@google.com>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* include/linux/input/touch_bus_negotiator.h
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*
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* Touch Bus Negotiator for Google Pixel devices.
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*
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* Copyright (C) 2019 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef TOUCHSCREEN_BUS_NEGOTIATOR_H
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#define TOUCHSCREEN_BUS_NEGOTIATOR_H
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#include <linux/workqueue.h>
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#include <linux/notifier.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include "qmi_tbn_v01.h"
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#define TBN_REQUEST_BUS_TIMEOUT_MS 500
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#define TBN_RELEASE_BUS_TIMEOUT_MS 500
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enum tbn_mode {
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TBN_MODE_QMI,
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TBN_MODE_GPIO,
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};
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enum tbn_bus_owner {
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TBN_BUS_OWNER_AP = 0,
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TBN_BUS_OWNER_LPI = 1,
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};
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struct tbn_context {
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struct device *dev;
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struct qmi_handle qmi_handle;
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struct mutex service_lock;
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struct work_struct request_work;
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struct work_struct release_work;
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struct workqueue_struct *qmi_wq;
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struct completion bus_requested;
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struct completion bus_released;
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bool connected;
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u8 mode;
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int lpi2ap_gpio;
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int ap2lpi_gpio;
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int lpi2ap_irq;
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};
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struct tbn_context *tbn_init(struct device *dev);
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void tbn_cleanup(struct tbn_context *tbn);
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int tbn_request_bus(struct tbn_context *tbn);
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int tbn_release_bus(struct tbn_context *tbn);
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#endif /* TOUCHSCREEN_BUS_NEGOTIATOR_H */
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