1 /* $NetBSD: auxreg.c,v 1.40 2012/07/29 00:04:05 matt Exp $ */
2
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)auxreg.c 8.1 (Berkeley) 6/11/93
41 */
42
43 #include <sys/cdefs.h>
44 __KERNEL_RCSID(0, "$NetBSD: auxreg.c,v 1.40 2012/07/29 00:04:05 matt Exp $");
45
46 #include "opt_blink.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/callout.h>
51 #include <sys/device.h>
52 #include <sys/kernel.h>
53
54 #include <machine/autoconf.h>
55
56 #include <sparc/sparc/vaddrs.h>
57 #include <sparc/sparc/auxreg.h>
58
59 volatile u_char *auxio_reg;
60 u_char auxio_regval;
61
62 static int auxregmatch_mainbus(device_t, cfdata_t, void *);
63 static int auxregmatch_obio(device_t, cfdata_t, void *);
64 static void auxregattach_mainbus(device_t, device_t, void *);
65 static void auxregattach_obio(device_t, device_t, void *);
66
67 static void auxregattach(void);
68
69 CFATTACH_DECL_NEW(auxreg_mainbus, 0,
70 auxregmatch_mainbus, auxregattach_mainbus, NULL, NULL);
71
72 CFATTACH_DECL_NEW(auxreg_obio, 0,
73 auxregmatch_obio, auxregattach_obio, NULL, NULL);
74
75 #ifdef BLINK
76 static callout_t blink_ch;
77
78 static void blink(void *);
79
80 static void
blink(void * zero)81 blink(void *zero)
82 {
83 register int s;
84
85 s = splhigh();
86 LED_FLIP;
87 splx(s);
88 /*
89 * Blink rate is:
90 * full cycle every second if completely idle (loadav = 0)
91 * full cycle every 2 seconds if loadav = 1
92 * full cycle every 3 seconds if loadav = 2
93 * etc.
94 */
95 s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1));
96 callout_reset(&blink_ch, s, blink, NULL);
97 }
98 #endif
99
100 /*
101 * The OPENPROM calls this "auxiliary-io" (sun4c) or "auxio" (sun4m).
102 */
103 static int
auxregmatch_mainbus(device_t parent,cfdata_t cf,void * aux)104 auxregmatch_mainbus(device_t parent, cfdata_t cf, void *aux)
105 {
106 struct mainbus_attach_args *ma = aux;
107
108 return (strcmp("auxiliary-io", ma->ma_name) == 0);
109 }
110
111 static int
auxregmatch_obio(device_t parent,cfdata_t cf,void * aux)112 auxregmatch_obio(device_t parent, cfdata_t cf, void *aux)
113 {
114 union obio_attach_args *uoba = aux;
115
116 if (uoba->uoba_isobio4 != 0)
117 return (0);
118
119 return (strcmp("auxio", uoba->uoba_sbus.sa_name) == 0);
120 }
121
122 /* ARGSUSED */
123 static void
auxregattach_mainbus(device_t parent,device_t self,void * aux)124 auxregattach_mainbus(device_t parent, device_t self, void *aux)
125 {
126 struct mainbus_attach_args *ma = aux;
127 bus_space_handle_t bh;
128
129 if (bus_space_map2(ma->ma_bustag,
130 (bus_addr_t)ma->ma_paddr,
131 sizeof(long),
132 BUS_SPACE_MAP_LINEAR,
133 AUXREG_VA,
134 &bh) != 0) {
135 printf("auxregattach_mainbus: can't map register\n");
136 return;
137 }
138
139 auxio_reg = AUXIO4C_REG;
140 auxio_regval = *AUXIO4C_REG | AUXIO4C_FEJ | AUXIO4C_MB1;
141 auxregattach();
142 }
143
144 static void
auxregattach_obio(device_t parent,device_t self,void * aux)145 auxregattach_obio(device_t parent, device_t self, void *aux)
146 {
147 union obio_attach_args *uoba = aux;
148 struct sbus_attach_args *sa = &uoba->uoba_sbus;
149 bus_space_handle_t bh;
150
151 if (bus_space_map2(sa->sa_bustag,
152 BUS_ADDR(sa->sa_slot, sa->sa_offset),
153 sizeof(long),
154 BUS_SPACE_MAP_LINEAR,
155 AUXREG_VA, &bh) != 0) {
156 printf("auxregattach_obio: can't map register\n");
157 return;
158 }
159
160 auxio_reg = AUXIO4M_REG;
161 auxio_regval = *AUXIO4M_REG | AUXIO4M_MB1;
162 auxregattach();
163 }
164
165 static void
auxregattach(void)166 auxregattach(void)
167 {
168
169 printf("\n");
170 #ifdef BLINK
171 callout_init(&blink_ch, 0);
172 blink((void *)0);
173 #else
174 LED_ON;
175 #endif
176 }
177
178 unsigned int
auxregbisc(int bis,int bic)179 auxregbisc(int bis, int bic)
180 {
181 register int s;
182
183 if (auxio_reg == 0)
184 /*
185 * Not all machines have an `aux' register; devices that
186 * depend on it should not get configured if it's absent.
187 */
188 panic("no aux register");
189
190 s = splhigh();
191 auxio_regval = (auxio_regval | bis) & ~bic;
192 *auxio_reg = auxio_regval;
193 splx(s);
194 return (auxio_regval);
195 }
196