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
41struct 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
48struct uturn_softc {
49	struct device sc_dv;
50
51	struct uturn_regs volatile *sc_regs;
52};
53
54int	uturnmatch(struct device *, void *, void *);
55void	uturnattach(struct device *, struct device *, void *);
56
57const struct cfattach uturn_ca = {
58	sizeof(struct uturn_softc), uturnmatch, uturnattach
59};
60
61struct cfdriver uturn_cd = {
62	NULL, "uturn", DV_DULL
63};
64
65int
66uturnmatch(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
86void
87uturnattach(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