1 /* $NetBSD: bwtwo_sbus.c,v 1.30 2022/09/25 18:03:04 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1992, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * This software was developed by the Computer Systems Engineering group
37 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
38 * contributed to Berkeley.
39 *
40 * All advertising materials mentioning features or use of this software
41 * must display the following acknowledgement:
42 * This product includes software developed by the University of
43 * California, Lawrence Berkeley Laboratory.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. Neither the name of the University nor the names of its contributors
54 * may be used to endorse or promote products derived from this software
55 * without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 * @(#)bwtwo.c 8.1 (Berkeley) 6/11/93
70 */
71
72 /*
73 * black&white display (bwtwo) driver.
74 *
75 * Does not handle interrupts, even though they can occur.
76 *
77 * P4 and overlay plane support by Jason R. Thorpe <thorpej@NetBSD.org>.
78 * Overlay plane handling hints and ideas provided by Brad Spencer.
79 */
80
81 #include <sys/cdefs.h>
82 __KERNEL_RCSID(0, "$NetBSD: bwtwo_sbus.c,v 1.30 2022/09/25 18:03:04 thorpej Exp $");
83
84 #include <sys/param.h>
85 #include <sys/systm.h>
86 #include <sys/device.h>
87 #include <sys/ioctl.h>
88 #include <sys/mman.h>
89 #include <sys/tty.h>
90 #include <sys/conf.h>
91
92 #include <machine/autoconf.h>
93 #include <machine/eeprom.h>
94
95 #include <dev/sbus/sbusvar.h>
96
97 #include <dev/sun/fbio.h>
98 #include <dev/sun/fbvar.h>
99 #include <dev/sun/btreg.h>
100 #include <dev/sun/bwtworeg.h>
101 #include <dev/sun/bwtwovar.h>
102 #include <dev/sun/pfourreg.h>
103
104 /* autoconfiguration driver */
105 static void bwtwoattach_sbus (device_t, device_t, void *);
106 static int bwtwomatch_sbus (device_t, cfdata_t, void *);
107
108 CFATTACH_DECL_NEW(bwtwo_sbus, sizeof(struct bwtwo_softc),
109 bwtwomatch_sbus, bwtwoattach_sbus, NULL, NULL);
110
111 static int bwtwo_get_video (struct bwtwo_softc *);
112 static void bwtwo_set_video (struct bwtwo_softc *, int);
113
114 /*
115 * Match a bwtwo.
116 */
117 static int
bwtwomatch_sbus(device_t parent,cfdata_t cf,void * aux)118 bwtwomatch_sbus(device_t parent, cfdata_t cf, void *aux)
119 {
120 struct sbus_attach_args *sa = aux;
121
122 if (strcmp(cf->cf_name, sa->sa_name) == 0)
123 return 100; /* beat genfb(4) */
124
125 return 0;
126 }
127
128
129 /*
130 * Attach a display. We need to notice if it is the console, too.
131 */
132 void
bwtwoattach_sbus(device_t parent,device_t self,void * args)133 bwtwoattach_sbus(device_t parent, device_t self, void *args)
134 {
135 struct bwtwo_softc *sc = device_private(self);
136 struct sbus_attach_args *sa = args;
137 struct fbdevice *fb = &sc->sc_fb;
138 bus_space_handle_t bh;
139 int isconsole, node;
140 const char *name;
141
142 sc->sc_dev = self;
143 node = sa->sa_node;
144
145 /* Remember cookies for bwtwo_mmap() */
146 sc->sc_bustag = sa->sa_bustag;
147 sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset);
148
149 fb->fb_flags = device_cfdata(self)->cf_flags;
150 fb->fb_type.fb_depth = 1;
151 fb_setsize_obp(fb, fb->fb_type.fb_depth, 1152, 900, node);
152
153 /*
154 * When the ROM has mapped in a bwtwo display, the address
155 * maps only the video RAM, hence we always map the control
156 * registers ourselves. We only need the video RAM if we are
157 * going to print characters via rconsole.
158 */
159 if (sbus_bus_map(sa->sa_bustag,
160 sa->sa_slot,
161 sa->sa_offset + BWREG_REG,
162 sizeof(struct fbcontrol),
163 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
164 aprint_error_dev(self, "cannot map control registers\n");
165 return;
166 }
167 sc->sc_reg = (struct fbcontrol *)bus_space_vaddr(sa->sa_bustag, bh);
168 fb->fb_pfour = NULL;
169
170 sc->sc_pixeloffset = BWREG_MEM;
171
172 isconsole = fb_is_console(node);
173 name = prom_getpropstring(node, "model");
174
175 /* Assume `bwtwo at sbus' only happens at sun4c's */
176 sc->sc_get_video = bwtwo_get_video;
177 sc->sc_set_video = bwtwo_set_video;
178
179 if (sa->sa_npromvaddrs != 0)
180 sc->sc_fb.fb_pixels = (void *)(u_long)sa->sa_promvaddrs[0];
181 if (isconsole && sc->sc_fb.fb_pixels == NULL) {
182 int ramsize = fb->fb_type.fb_height * fb->fb_linebytes;
183 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot,
184 sa->sa_offset + sc->sc_pixeloffset,
185 ramsize,
186 BUS_SPACE_MAP_LINEAR, &bh) != 0) {
187 aprint_error_dev(self, "cannot map pixels\n");
188 return;
189 }
190 sc->sc_fb.fb_pixels = (char *)bus_space_vaddr(sa->sa_bustag, bh);
191 }
192
193 bwtwoattach(sc, name, isconsole);
194 }
195
196 static void
bwtwo_set_video(struct bwtwo_softc * sc,int enable)197 bwtwo_set_video(struct bwtwo_softc *sc, int enable)
198 {
199
200 if (enable)
201 /*
202 * If the we're the console the PROM will have taken care
203 * of the FBC_TIMING bit and video control parameters. We
204 * simply turn on FBC_TIMING; in case other video parameters
205 * are necessary, here is a set read from an ELC:
206 * [0xbb,0x2b,0x4,0x14,0xae,0x3,0xa8,0x24,0x1,0x5,0xff,0x1]
207 */
208 sc->sc_reg->fbc_ctrl |= FBC_VENAB | FBC_TIMING;
209 else
210 sc->sc_reg->fbc_ctrl &= ~FBC_VENAB;
211 }
212
213 static int
bwtwo_get_video(struct bwtwo_softc * sc)214 bwtwo_get_video(struct bwtwo_softc *sc)
215 {
216
217 return ((sc->sc_reg->fbc_ctrl & FBC_VENAB) != 0);
218 }
219