50 строки
1.2 KiB
C
50 строки
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Character LCD driver for Linux
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*
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* Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
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* Copyright (C) 2016-2017 Glider bvba
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*/
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#ifndef _CHARLCD_H
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#define _CHARLCD_H
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enum charlcd_onoff {
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CHARLCD_OFF = 0,
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CHARLCD_ON,
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};
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struct charlcd {
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const struct charlcd_ops *ops;
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const unsigned char *char_conv; /* Optional */
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int ifwidth; /* 4-bit or 8-bit (default) */
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int height;
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int width;
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int bwidth; /* Default set by charlcd_alloc() */
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int hwidth; /* Default set by charlcd_alloc() */
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void *drvdata; /* Set by charlcd_alloc() */
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};
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struct charlcd_ops {
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/* Required */
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void (*write_cmd)(struct charlcd *lcd, int cmd);
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void (*write_data)(struct charlcd *lcd, int data);
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/* Optional */
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void (*write_cmd_raw4)(struct charlcd *lcd, int cmd); /* 4-bit only */
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void (*clear_fast)(struct charlcd *lcd);
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void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on);
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};
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struct charlcd *charlcd_alloc(unsigned int drvdata_size);
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void charlcd_free(struct charlcd *lcd);
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int charlcd_register(struct charlcd *lcd);
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int charlcd_unregister(struct charlcd *lcd);
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void charlcd_poke(struct charlcd *lcd);
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#endif /* CHARLCD_H */
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