1 /* $NetBSD: lcd.c,v 1.3 2018/09/04 15:08:30 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2008 Izumi Tsutsui. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <lib/libsa/stand.h>
28 #include <lib/libkern/libkern.h>
29
30 #include <dev/ic/hd44780reg.h>
31
32 #include <machine/cpu.h>
33
34 #include "boot.h"
35
36 #define IREG 0x00
37 #define DREG 0x10
38
39 #if 0
40 #define CSR_READ(base, reg) \
41 (((*(volatile uint32_t *)((base) + (reg))) >> 24), delay(10))
42 #endif
43
44 #define CSR_WRITE(base, reg, val) \
45 do { \
46 *(volatile uint32_t *)((base) + (reg)) = ((val) << 24); \
47 delay(10); \
48 } while (/* CONSTCOND */ 0)
49
50 #define NCOLS 16
51
52 struct lcd_message {
53 char row1[NCOLS];
54 char row2[NCOLS];
55 };
56
57 static uint32_t lcd_base;
58 static const struct lcd_message banner_message = {
59 "NetBSD/cobalt ",
60 "Bootloader "
61 };
62 static const struct lcd_message failed_message = {
63 "Boot failed! ",
64 "Rebooting... "
65 };
66 static struct lcd_message loadfile_message = {
67 "Loading: ",
68 " "
69 };
70
71 static void lcd_puts(const struct lcd_message *);
72
73 void
lcd_init(void)74 lcd_init(void)
75 {
76
77 lcd_base = MIPS_PHYS_TO_KSEG1(LCD_BASE);
78 }
79
80 void
lcd_banner(void)81 lcd_banner(void)
82 {
83
84 lcd_puts(&banner_message);
85 }
86
87 void
lcd_loadfile(const char * file)88 lcd_loadfile(const char *file)
89 {
90
91 memcpy(loadfile_message.row2, file, uimin(NCOLS, strlen(file)));
92
93 lcd_puts(&loadfile_message);
94 }
95
96 void
lcd_failed(void)97 lcd_failed(void)
98 {
99
100 lcd_puts(&failed_message);
101 }
102
103 static void
lcd_puts(const struct lcd_message * message)104 lcd_puts(const struct lcd_message *message)
105 {
106 int i;
107
108 for (i = 0; i < NCOLS; i++) {
109 CSR_WRITE(lcd_base, IREG, cmd_ddramset(HD_ROW1_ADDR + i));
110 CSR_WRITE(lcd_base, DREG, message->row1[i]);
111 }
112 for (i = 0; i < NCOLS; i++) {
113 CSR_WRITE(lcd_base, IREG, cmd_ddramset(HD_ROW2_ADDR + i));
114 CSR_WRITE(lcd_base, DREG, message->row2[i]);
115 }
116 }
117