155 lines
5.3 KiB
C
155 lines
5.3 KiB
C
/* $NetBSD: hd44780var.h,v 1.4 2005/12/11 12:21:26 christos Exp $ */
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/*
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* Copyright (c) 2002 Dennis I. Chernoivanov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_IC_HD44780VAR_H_
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#define _DEV_IC_HD44780VAR_H_
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/* IOCTL definitions */
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#define HLCD_DISPCTL _IOW('h', 1, struct hd44780_dispctl)
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#define HLCD_RESET _IO('h', 2)
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#define HLCD_CLEAR _IO('h', 3)
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#define HLCD_CURSOR_LEFT _IO('h', 4)
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#define HLCD_CURSOR_RIGHT _IO('h', 5)
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#define HLCD_GET_CURSOR_POS _IOR('h', 6, struct hd44780_io)
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#define HLCD_SET_CURSOR_POS _IOW('h', 7, struct hd44780_io)
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#define HLCD_GETC _IOR('h', 8, struct hd44780_io)
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#define HLCD_PUTC _IOW('h', 9, struct hd44780_io)
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#define HLCD_SHIFT_LEFT _IO('h', 10)
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#define HLCD_SHIFT_RIGHT _IO('h', 11)
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#define HLCD_HOME _IO('h', 12)
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#define HLCD_WRITE _IOWR('h', 13, struct hd44780_io)
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#define HLCD_READ _IOWR('h', 14, struct hd44780_io)
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#define HLCD_REDRAW _IOW('h', 15, struct hd44780_io)
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#define HLCD_WRITE_INST _IOW('h', 16, struct hd44780_io)
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#define HLCD_WRITE_DATA _IOW('h', 17, struct hd44780_io)
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#define HLCD_GET_INFO _IOR('h', 18, struct hd44780_info)
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#define HLCD_GET_CHIPNO _IOR('h', 19, u_int8_t)
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#define HLCD_SET_CHIPNO _IOW('h', 20, u_int8_t)
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struct hd44780_dispctl {
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u_int8_t chip;
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u_char display_on:1,
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blink_on:1,
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cursor_on:1;
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};
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struct hd44780_io {
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u_int8_t chip;
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u_int8_t dat;
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u_int8_t len;
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u_int8_t buf[HD_MAX_CHARS];
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};
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struct hd44780_info {
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u_char lines;
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u_char phys_rows;
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u_char virt_rows;
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u_char is_wide:1,
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is_bigfont:1,
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kp_present:1;
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};
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#ifdef _KERNEL
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struct hlcd_screen {
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int hlcd_curon;
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int hlcd_curx;
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int hlcd_cury;
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u_char *image; /* characters of screen */
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struct hd44780_chip *hlcd_sc;
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};
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/* HLCD driver structure */
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struct hd44780_chip {
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#define HD_8BIT 0x01 /* 8-bit if set, 4-bit otherwise */
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#define HD_MULTILINE 0x02 /* 2 lines if set, 1 otherwise */
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#define HD_BIGFONT 0x04 /* 5x10 if set, 5x8 otherwise */
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#define HD_KEYPAD 0x08 /* if set, keypad is connected */
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#define HD_UP 0x10 /* if set, lcd has been initialized */
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#define HD_TIMEDOUT 0x20 /* lcd has recently stopped talking */
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#define HD_MULTICHIP 0x40 /* two HD44780 controllers (4-line) */
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u_char sc_flags;
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u_char sc_cols; /* visible columns */
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u_char sc_vcols; /* virtual columns (normally 40) */
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u_char sc_dev_ok;
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u_char sc_curchip;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioir; /* instruction register */
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bus_space_handle_t sc_iodr; /* data register */
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struct device *sc_dev; /* Pointer to parent device */
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struct hlcd_screen sc_screen; /* currently displayed screen copy */
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struct hlcd_screen *sc_curscr; /* active screen */
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struct callout redraw; /* wsdisplay refresh/redraw timer */
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/* Generic write/read byte entries. */
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void (* sc_writereg)(struct hd44780_chip *, u_int32_t, u_int32_t,
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u_int8_t);
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u_int8_t (* sc_readreg)(struct hd44780_chip *, u_int32_t, u_int32_t);
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};
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#define hd44780_ir_write(sc, en, dat) \
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do { \
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hd44780_busy_wait(sc, (en)); \
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(sc)->sc_writereg((sc), (en), 0, (dat)); \
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} while(0)
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#define hd44780_ir_read(sc, en) \
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(sc)->sc_readreg((sc), (en), 0)
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#define hd44780_dr_write(sc, en, dat) \
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(sc)->sc_writereg((sc), (en), 1, (dat))
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#define hd44780_dr_read(sc, en) \
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(sc)->sc_readreg((sc), (en), 1)
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void hd44780_attach_subr(struct hd44780_chip *);
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void hd44780_busy_wait(struct hd44780_chip *, u_int32_t);
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int hd44780_init(struct hd44780_chip *);
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int hd44780_chipinit(struct hd44780_chip *, u_int32_t);
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int hd44780_ioctl_subr(struct hd44780_chip *, u_long, caddr_t);
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void hd44780_ddram_redraw(struct hd44780_chip *, u_int32_t, struct hd44780_io *);
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#define HD_DDRAM_READ 0x0
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#define HD_DDRAM_WRITE 0x1
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int hd44780_ddram_io(struct hd44780_chip *, u_int32_t, struct hd44780_io *, u_char);
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#if defined(HD44780_STD_WIDE) || defined(HD44780_STD_SHORT)
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void hd44780_writereg(struct hd44780_chip *, u_int32_t, u_int32_t, u_int8_t);
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u_int8_t hd44780_readreg(struct hd44780_chip *, u_int32_t, u_int32_t);
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#endif
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#endif /* _KERNEL */
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#endif /* _DEV_IC_HD44780VAR_H_ */
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