NetBSD/sys/dev/ic/hd44780_subr.h

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/* $NetBSD: hd44780_subr.h,v 1.1 2003/01/20 01:20:51 soren Exp $ */
/*
* Copyright (c) 2002 Dennis I. Chernoivanov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _DEV_IC_HD44780_SUBR_H_
#define _DEV_IC_HD44780_SUBR_H_
/* IOCTL definitions */
#define HLCD_DISPCTL _IOW('h', 1, struct hd44780_dispctl)
#define HLCD_RESET _IO('h', 2)
#define HLCD_CLEAR _IO('h', 3)
#define HLCD_CURSOR_LEFT _IO('h', 4)
#define HLCD_CURSOR_RIGHT _IO('h', 5)
#define HLCD_GET_CURSOR_POS _IOR('h', 6, struct hd44780_io)
#define HLCD_SET_CURSOR_POS _IOW('h', 7, struct hd44780_io)
#define HLCD_GETC _IOR('h', 8, struct hd44780_io)
#define HLCD_PUTC _IOW('h', 9, struct hd44780_io)
#define HLCD_SHIFT_LEFT _IO('h', 10)
#define HLCD_SHIFT_RIGHT _IO('h', 11)
#define HLCD_HOME _IO('h', 12)
#define HLCD_WRITE _IOWR('h', 13, struct hd44780_io)
#define HLCD_READ _IOWR('h', 14, struct hd44780_io)
#define HLCD_REDRAW _IOW('h', 15, struct hd44780_io)
#define HLCD_WRITE_INST _IOW('h', 16, struct hd44780_io)
#define HLCD_WRITE_DATA _IOW('h', 17, struct hd44780_io)
#define HLCD_GET_INFO _IOR('h', 18, struct hd44780_info)
struct hd44780_dispctl {
u_char display_on:1,
blink_on:1,
cursor_on:1;
};
struct hd44780_io {
u_int8_t dat;
u_int8_t len;
u_int8_t buf[HD_MAX_CHARS];
};
struct hd44780_info {
u_char lines;
u_char phys_rows;
u_char virt_rows;
u_char is_wide:1,
is_bigfont:1,
kp_present:1;
};
#ifdef _KERNEL
/* HLCD driver structure */
struct hd44780_chip {
#define HD_8BIT 0x01 /* 8-bit if set, 4-bit otherwise */
#define HD_MULTILINE 0x02 /* 2 lines if set, 1 otherwise */
#define HD_BIGFONT 0x04 /* 5x10 if set, 5x8 otherwise */
#define HD_KEYPAD 0x08 /* if set, keypad is connected */
u_char sc_flags;
u_char sc_rows; /* visible rows */
u_char sc_vrows; /* virtual rows (normally 40) */
u_char sc_dev_ok;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioir; /* instruction register */
bus_space_handle_t sc_iodr; /* data register */
/*
* This one is here to make initialization generic. If 4-bit
* connection is used, the device still starts as if it was
* 8-bit connected, so a special care is needed for such case.
* If set to NULL, normal 'sc_rwrite()' function will be used
* during initialization.
*/
void (* sc_irwrite)(bus_space_tag_t, bus_space_handle_t, u_int8_t);
/* Generic write/read byte entries. */
void (* sc_rwrite)(bus_space_tag_t, bus_space_handle_t, u_int8_t);
u_int8_t (* sc_rread)(bus_space_tag_t, bus_space_handle_t);
};
#define hd44780_busy_wait(sc) \
while((hd44780_ir_read(sc) & BUSY_FLAG) == BUSY_FLAG)
#define hd44780_ir_write(sc, dat) \
do { \
hd44780_busy_wait(sc); \
(sc)->sc_rwrite((sc)->sc_iot, (sc)->sc_ioir, (dat)); \
} while(0)
#define hd44780_ir_read(sc) \
(sc)->sc_rread((sc)->sc_iot, (sc)->sc_ioir)
#define hd44780_dr_write(sc, dat) \
(sc)->sc_rwrite((sc)->sc_iot, (sc)->sc_iodr, (dat))
#define hd44780_dr_read(sc) \
(sc)->sc_rread((sc)->sc_iot, (sc)->sc_iodr)
void hd44780_attach_subr(struct hd44780_chip *);
int hd44780_ioctl_subr(struct hd44780_chip *, u_long, caddr_t);
void hd44780_ddram_redraw(struct hd44780_chip *, struct hd44780_io *);
#define HD_DDRAM_READ 0x0
#define HD_DDRAM_WRITE 0x1
int hd44780_ddram_io(struct hd44780_chip *, struct hd44780_io *, u_char);
#if defined(HD44780_STD_SHORT)
void hd44780_irwrite(bus_space_tag_t, bus_space_handle_t, u_int8_t);
#endif
#if defined(HD44780_STD_WIDE) || defined(HD44780_STD_SHORT)
void hd44780_rwrite(bus_space_tag_t, bus_space_handle_t, u_int8_t);
u_int8_t hd44780_rread(bus_space_tag_t, bus_space_handle_t);
#endif
#endif /* _KERNEL */
#endif /* _DEV_IC_HD44780_SUBR_H_ */