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27 lines
756 B
C
27 lines
756 B
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef OHCI_H
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#define OHCI_H
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/*
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* Provides support for USB keyboards connected via an OHCI controller.
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*
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* Copyright (C) 2021 Martin Whitaker.
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*/
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#include <stdint.h>
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/*
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* Initialises the OHCI device found at base_addr, scans all the attached USB
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* devices, and configures any HID USB keyboard devices it finds to generate
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* periodic interrupt transfers that report key presses.
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*/
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void *ohci_init(uintptr_t base_addr);
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/*
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* Polls the completed periodic interrupt transfers, stores the keycodes from
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* any new key press events in an internal queue, and if the keycode queue is
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* not empty, pops and returns the keycode from the front of the queue.
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*/
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uint8_t ohci_get_keycode(void *ws);
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#endif // OHCI_H
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