1 /* $OpenBSD: uturn.c,v 1.8 2022/03/13 08:04:38 mpi Exp $ */
2
3 /*
4 * Copyright (c) 2004 Michael Shalayeff
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26 * THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /* TODO IOA programming */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/device.h>
34 #include <sys/reboot.h>
35
36 #include <machine/iomod.h>
37 #include <machine/autoconf.h>
38
39 #include <hppa/dev/cpudevs.h>
40
41 struct uturn_regs {
42 u_int64_t resv0[2];
43 u_int64_t status; /* 0x10: */
44 u_int64_t resv1[5];
45 u_int64_t debug; /* 0x40: */
46 };
47
48 struct uturn_softc {
49 struct device sc_dv;
50
51 struct uturn_regs volatile *sc_regs;
52 };
53
54 int uturnmatch(struct device *, void *, void *);
55 void uturnattach(struct device *, struct device *, void *);
56
57 const struct cfattach uturn_ca = {
58 sizeof(struct uturn_softc), uturnmatch, uturnattach
59 };
60
61 struct cfdriver uturn_cd = {
62 NULL, "uturn", DV_DULL
63 };
64
65 int
uturnmatch(parent,cfdata,aux)66 uturnmatch(parent, cfdata, aux)
67 struct device *parent;
68 void *cfdata;
69 void *aux;
70 {
71 struct confargs *ca = aux;
72 /* struct cfdata *cf = cfdata; */
73
74 /* there will be only one */
75 if (ca->ca_type.iodc_type != HPPA_TYPE_IOA ||
76 ca->ca_type.iodc_sv_model != HPPA_IOA_UTURN)
77 return 0;
78
79 if (ca->ca_type.iodc_model == 0x58 &&
80 ca->ca_type.iodc_revision >= 0x20)
81 return 0;
82
83 return 1;
84 }
85
86 void
uturnattach(parent,self,aux)87 uturnattach(parent, self, aux)
88 struct device *parent;
89 struct device *self;
90 void *aux;
91 {
92 struct confargs *ca = aux, nca;
93 struct uturn_softc *sc = (struct uturn_softc *)self;
94 bus_space_handle_t ioh;
95 hppa_hpa_t hpa;
96
97 if (bus_space_map(ca->ca_iot, ca->ca_hpa, IOMOD_HPASIZE, 0, &ioh)) {
98 printf(": can't map IO space\n");
99 return;
100 }
101 sc->sc_regs = (struct uturn_regs *)ca->ca_hpa;
102
103 printf(": %s rev %d\n",
104 ca->ca_type.iodc_revision < 0x10? "U2" : "UTurn",
105 ca->ca_type.iodc_revision & 0xf);
106
107 /* keep it real */
108 ((struct iomod *)ioh)->io_control = 0x80;
109
110 /*
111 * U2/UTurn is actually a combination of an Upper Bus
112 * Converter (UBC) and a Lower Bus Converter (LBC). This
113 * driver attaches to the UBC; the LBC isn't very interesting,
114 * so we skip it. This is easy, since it always is module 63,
115 * hence the MAXMODBUS - 1 below.
116 */
117 nca = *ca;
118 nca.ca_hpamask = HPPA_IOBEGIN;
119 pdc_scanbus(self, &nca, MAXMODBUS - 1, 0, 0);
120
121 /* XXX On some machines, PDC doesn't tell us about all devices. */
122 switch (cpu_hvers) {
123 case HPPA_BOARD_HP809:
124 case HPPA_BOARD_HP819:
125 case HPPA_BOARD_HP829:
126 case HPPA_BOARD_HP839:
127 case HPPA_BOARD_HP849:
128 case HPPA_BOARD_HP859:
129 case HPPA_BOARD_HP869:
130 hpa = ((struct iomod *)ioh)->io_io_low << 16;
131 pdc_scanbus(self, &nca, MAXMODBUS - 1, hpa, 0);
132 break;
133 default:
134 break;
135 }
136 }
137