master
1/* $NetBSD: hd44780var.h,v 1.8 2015/09/06 06:01:00 dholland Exp $ */
2
3/*
4 * Copyright (c) 2002 Dennis I. Chernoivanov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef _DEV_IC_HD44780VAR_H_
31#define _DEV_IC_HD44780VAR_H_
32
33#include <sys/ioccom.h>
34
35/* IOCTL definitions */
36#define HLCD_DISPCTL _IOW('h', 1, struct hd44780_dispctl)
37#define HLCD_RESET _IO('h', 2)
38#define HLCD_CLEAR _IO('h', 3)
39#define HLCD_CURSOR_LEFT _IO('h', 4)
40#define HLCD_CURSOR_RIGHT _IO('h', 5)
41#define HLCD_GET_CURSOR_POS _IOR('h', 6, struct hd44780_io)
42#define HLCD_SET_CURSOR_POS _IOW('h', 7, struct hd44780_io)
43#define HLCD_GETC _IOR('h', 8, struct hd44780_io)
44#define HLCD_PUTC _IOW('h', 9, struct hd44780_io)
45#define HLCD_SHIFT_LEFT _IO('h', 10)
46#define HLCD_SHIFT_RIGHT _IO('h', 11)
47#define HLCD_HOME _IO('h', 12)
48#define HLCD_WRITE _IOWR('h', 13, struct hd44780_io)
49#define HLCD_READ _IOWR('h', 14, struct hd44780_io)
50#define HLCD_REDRAW _IOW('h', 15, struct hd44780_io)
51#define HLCD_WRITE_INST _IOW('h', 16, struct hd44780_io)
52#define HLCD_WRITE_DATA _IOW('h', 17, struct hd44780_io)
53#define HLCD_GET_INFO _IOR('h', 18, struct hd44780_info)
54#define HLCD_GET_CHIPNO _IOR('h', 19, uint8_t)
55#define HLCD_SET_CHIPNO _IOW('h', 20, uint8_t)
56
57struct hd44780_dispctl {
58 uint8_t chip;
59 uint8_t display_on:1,
60 blink_on:1,
61 cursor_on:1;
62};
63
64struct hd44780_io {
65 uint8_t chip;
66 uint8_t dat;
67 uint8_t len;
68 uint8_t buf[HD_MAX_CHARS];
69};
70
71struct hd44780_info {
72 uint8_t lines;
73 uint8_t phys_rows;
74 uint8_t virt_rows;
75
76 uint8_t is_wide:1,
77 is_bigfont:1,
78 kp_present:1;
79};
80
81#ifdef _KERNEL
82
83struct hlcd_screen {
84 int hlcd_curon;
85 int hlcd_curx;
86 int hlcd_cury;
87 uint8_t *image; /* characters of screen */
88 struct hd44780_chip *hlcd_sc;
89};
90
91/* HLCD driver structure */
92struct hd44780_chip {
93#define HD_8BIT 0x01 /* 8-bit if set, 4-bit otherwise */
94#define HD_MULTILINE 0x02 /* 2 lines if set, 1 otherwise */
95#define HD_BIGFONT 0x04 /* 5x10 if set, 5x8 otherwise */
96#define HD_KEYPAD 0x08 /* if set, keypad is connected */
97#define HD_UP 0x10 /* if set, lcd has been initialized */
98#define HD_TIMEDOUT 0x20 /* lcd has recently stopped talking */
99#define HD_MULTICHIP 0x40 /* two HD44780 controllers (4-line) */
100 uint8_t sc_flags;
101
102 uint8_t sc_cols; /* visible columns */
103 uint8_t sc_vcols; /* virtual columns (normally 40) */
104 uint8_t sc_dev_ok;
105 uint8_t sc_curchip;
106
107 bus_space_tag_t sc_iot;
108
109 bus_space_handle_t sc_ioir; /* instruction register */
110 bus_space_handle_t sc_iodr; /* data register */
111
112 device_t sc_dev; /* Pointer to parent device */
113 struct hlcd_screen sc_screen; /* currently displayed screen copy */
114 struct hlcd_screen *sc_curscr; /* active screen */
115 struct callout redraw; /* wsdisplay refresh/redraw timer */
116
117 /* Generic write/read byte entries. */
118 void (* sc_writereg)(struct hd44780_chip *, uint32_t, uint32_t,
119 uint8_t);
120 uint8_t (* sc_readreg)(struct hd44780_chip *, uint32_t, uint32_t);
121};
122
123#define hd44780_ir_write(sc, en, dat) \
124 do { \
125 hd44780_busy_wait(sc, (en)); \
126 (sc)->sc_writereg((sc), (en), 0, (dat)); \
127 } while(0)
128
129#define hd44780_ir_read(sc, en) \
130 (sc)->sc_readreg((sc), (en), 0)
131
132#define hd44780_dr_write(sc, en, dat) \
133 (sc)->sc_writereg((sc), (en), 1, (dat))
134
135#define hd44780_dr_read(sc, en) \
136 (sc)->sc_readreg((sc), (en), 1)
137
138void hd44780_attach_subr(struct hd44780_chip *);
139void hd44780_busy_wait(struct hd44780_chip *, uint32_t);
140int hd44780_init(struct hd44780_chip *);
141int hd44780_chipinit(struct hd44780_chip *, uint32_t);
142int hd44780_ioctl_subr(struct hd44780_chip *, u_long, void *);
143void hd44780_ddram_redraw(struct hd44780_chip *, uint32_t, struct hd44780_io *);
144
145#define HD_DDRAM_READ 0x0
146#define HD_DDRAM_WRITE 0x1
147int hd44780_ddram_io(struct hd44780_chip *, uint32_t, struct hd44780_io *,
148 uint8_t);
149
150#if defined(HD44780_STD_WIDE) || defined(HD44780_STD_SHORT)
151void hd44780_writereg(struct hd44780_chip *, uint32_t, uint32_t, uint8_t);
152uint8_t hd44780_readreg(struct hd44780_chip *, uint32_t, uint32_t);
153#endif
154
155#endif /* _KERNEL */
156
157#endif /* _DEV_IC_HD44780VAR_H_ */