1 /* $NetBSD: lcd.c,v 1.2 2018/09/03 16:29:24 riastradh Exp $ */
2 /* OpenBSD: lcd.c,v 1.2 2007/07/20 22:13:45 kettenis Exp */
3
4 /*
5 * Copyright (c) 2007 Mark Kettenis
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/param.h>
21 #include <sys/device.h>
22 #include <sys/kernel.h>
23 #include <sys/systm.h>
24 #include <sys/callout.h>
25
26 #include <machine/autoconf.h>
27 #include <sys/bus.h>
28 #include <machine/cpu.h>
29 #include <machine/pdc.h>
30
31 #define LCD_CLS 0x01
32 #define LCD_HOME 0x02
33 #define LCD_LOCATE(X, Y) (((Y) & 1 ? 0xc0 : 0x80) | ((X) & 0x0f))
34
35 struct lcd_softc {
36 device_t sc_dv;
37
38 bus_space_tag_t sc_iot;
39 bus_space_handle_t sc_cmdh, sc_datah;
40
41 u_int sc_delay;
42 uint8_t sc_heartbeat[3];
43
44 struct callout sc_to;
45 int sc_on;
46 struct blink_lcd sc_blink;
47 };
48
49 int lcd_match(device_t, cfdata_t, void *);
50 void lcd_attach(device_t, device_t, void *);
51
52 CFATTACH_DECL_NEW(lcd, sizeof(struct lcd_softc), lcd_match,
53 lcd_attach, NULL, NULL);
54
55 void lcd_write(struct lcd_softc *, const char *);
56 void lcd_blink(void *, int);
57 void lcd_blink_finish(void *);
58
59 int
lcd_match(device_t parent,cfdata_t match,void * aux)60 lcd_match(device_t parent, cfdata_t match, void *aux)
61 {
62 struct confargs *ca = aux;
63
64 if (strcmp(ca->ca_name, "lcd") == 0)
65 return 1;
66
67 return 0;
68 }
69
70 void
lcd_attach(device_t parent,device_t self,void * aux)71 lcd_attach(device_t parent, device_t self, void *aux)
72 {
73 struct lcd_softc *sc = device_private(self);
74 struct confargs *ca = aux;
75 struct pdc_chassis_lcd *pdc_lcd = &ca->ca_pcl;
76 int i;
77
78 sc->sc_dv = self;
79 sc->sc_iot = ca->ca_iot;
80
81 if (bus_space_map(sc->sc_iot, pdc_lcd->cmd_addr, 1, 0, &sc->sc_cmdh)) {
82 aprint_error(": can't map cmd register\n");
83 return;
84 }
85
86 if (bus_space_map(sc->sc_iot, pdc_lcd->data_addr, 1, 0,
87 &sc->sc_datah)) {
88 aprint_error(": can't map data register\n");
89 bus_space_unmap(sc->sc_iot, sc->sc_cmdh, 1);
90 return;
91 }
92
93 aprint_normal(": model %d\n", pdc_lcd->model);
94
95 sc->sc_delay = pdc_lcd->delay;
96 for (i = 0; i < 3; i++)
97 sc->sc_heartbeat[i] = pdc_lcd->heartbeat[i];
98
99 bus_space_write_1(sc->sc_iot, sc->sc_cmdh, 0, LCD_CLS);
100 delay(100 * sc->sc_delay);
101
102 bus_space_write_1(sc->sc_iot, sc->sc_cmdh, 0, LCD_LOCATE(0, 0));
103 delay(sc->sc_delay);
104 lcd_write(sc, "NetBSD/" MACHINE);
105
106 callout_init(&sc->sc_to, 0);
107 callout_setfunc(&sc->sc_to, lcd_blink_finish, sc);
108
109 sc->sc_blink.bl_func = lcd_blink;
110 sc->sc_blink.bl_arg = sc;
111 blink_lcd_register(&sc->sc_blink);
112 }
113
114 void
lcd_write(struct lcd_softc * sc,const char * str)115 lcd_write(struct lcd_softc *sc, const char *str)
116 {
117 while (*str) {
118 bus_space_write_1(sc->sc_iot, sc->sc_datah, 0, *str++);
119 delay(sc->sc_delay);
120 }
121 }
122
123 void
lcd_blink(void * v,int on)124 lcd_blink(void *v, int on)
125 {
126 struct lcd_softc *sc = v;
127
128 sc->sc_on = on;
129 bus_space_write_1(sc->sc_iot, sc->sc_cmdh, 0, sc->sc_heartbeat[0]);
130 callout_schedule(&sc->sc_to, uimax(1, (sc->sc_delay * hz) / 1000000));
131 }
132
133 void
lcd_blink_finish(void * v)134 lcd_blink_finish(void *v)
135 {
136 struct lcd_softc *sc = v;
137 uint8_t data;
138
139 if (sc->sc_on)
140 data = sc->sc_heartbeat[1];
141 else
142 data = sc->sc_heartbeat[2];
143
144 bus_space_write_1(sc->sc_iot, sc->sc_datah, 0, data);
145 }
146