mirror of
https://github.com/AsahiLinux/m1n1
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50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: MIT */
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#ifndef IODEV_H
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#define IODEV_H
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#include "types.h"
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#include "utils.h"
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typedef enum _iodev_id_t { IODEV_UART, IODEV_FB, IODEV_USB0, IODEV_USB1, IODEV_MAX } iodev_id_t;
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typedef enum _iodev_usage_t {
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USAGE_CONSOLE = BIT(0),
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USAGE_UARTPROXY = BIT(1),
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} iodev_usage_t;
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struct iodev_ops {
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bool (*can_read)(void *opaque);
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bool (*can_write)(void *opaque);
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ssize_t (*read)(void *opaque, void *buf, size_t length);
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ssize_t (*write)(void *opaque, const void *buf, size_t length);
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void (*handle_events)(void *opaque);
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};
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struct iodev {
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const struct iodev_ops *ops;
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iodev_usage_t usage;
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void *opaque;
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};
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extern struct iodev *iodevs[IODEV_MAX];
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bool iodev_can_read(iodev_id_t id);
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bool iodev_can_write(iodev_id_t id);
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ssize_t iodev_read(iodev_id_t id, void *buf, size_t length);
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ssize_t iodev_write(iodev_id_t id, const void *buf, size_t length);
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void iodev_handle_events(iodev_id_t id);
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void iodev_console_write(const void *buf, size_t length);
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static inline void iodev_console_flush(void)
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{
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iodev_console_write(NULL, 0);
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}
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static inline void iodev_set_usage(iodev_id_t id, iodev_usage_t usage)
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{
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iodevs[id]->usage = usage;
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}
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#endif
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