1 /* $NetBSD: osiop_jazzio.c,v 1.11 2023/12/20 06:36:02 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Izumi Tsutsui. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: osiop_jazzio.c,v 1.11 2023/12/20 06:36:02 thorpej Exp $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/device.h>
33 #include <sys/buf.h>
34
35 #include <dev/scsipi/scsi_all.h>
36 #include <dev/scsipi/scsipi_all.h>
37 #include <dev/scsipi/scsiconf.h>
38
39 #include <machine/cpu.h>
40 #include <machine/autoconf.h>
41 #include <sys/bus.h>
42
43 #include <dev/ic/osiopreg.h>
44 #include <dev/ic/osiopvar.h>
45
46 #include <arc/jazz/jazziovar.h>
47
48 int osiop_jazzio_match(device_t, cfdata_t, void *);
49 void osiop_jazzio_attach(device_t, device_t, void *);
50 int osiop_jazzio_intr(void *);
51
52 CFATTACH_DECL_NEW(osiop_jazzio, sizeof(struct osiop_softc),
53 osiop_jazzio_match, osiop_jazzio_attach, NULL, NULL);
54
55 int
osiop_jazzio_match(device_t parent,cfdata_t cf,void * aux)56 osiop_jazzio_match(device_t parent, cfdata_t cf, void *aux)
57 {
58 struct jazzio_attach_args *ja = aux;
59
60 if (strcmp(ja->ja_name, "NCRC710") != 0)
61 return 0;
62
63 return 1;
64 }
65
66 void
osiop_jazzio_attach(device_t parent,device_t self,void * aux)67 osiop_jazzio_attach(device_t parent, device_t self, void *aux)
68 {
69 struct osiop_softc *sc = device_private(self);
70 struct jazzio_attach_args *ja = aux;
71 int err, scid;
72
73 sc->sc_dev = self;
74 sc->sc_bst = ja->ja_bust;
75 sc->sc_dmat = ja->ja_dmat;
76
77 /*
78 * Map registers
79 */
80 err = bus_space_map(sc->sc_bst, ja->ja_addr,
81 OSIOP_NREGS, 0, &sc->sc_reg);
82 if (err) {
83 aprint_error(": failed to map registers, err=%d\n", err);
84 return;
85 }
86
87 sc->sc_clock_freq = 50; /* MHz */
88 sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
89 sc->sc_dcntl = OSIOP_DCNTL_EA;
90
91 /* XXX should check ID in BIOS variables? */
92 scid = ffs(osiop_read_1(sc, OSIOP_SCID));
93
94 if (scid == 0)
95 scid = 7;
96 else
97 scid--;
98
99 sc->sc_id = scid;
100
101 /*
102 * Call common attachment
103 */
104 osiop_attach(sc);
105
106 /*
107 * Set up interrupt handler.
108 */
109 jazzio_intr_establish(ja->ja_intr,
110 (intr_handler_t)osiop_jazzio_intr, sc);
111 }
112
113 /*
114 * interrupt handler
115 */
116 int
osiop_jazzio_intr(void * arg)117 osiop_jazzio_intr(void *arg)
118 {
119 struct osiop_softc *sc = arg;
120 uint8_t istat;
121
122 /* This is potentially nasty, since the IRQ is level triggered... */
123 if (sc->sc_flags & OSIOP_INTSOFF)
124 return 0;
125
126 istat = osiop_read_1(sc, OSIOP_ISTAT);
127
128 if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
129 return 0;
130
131 /* Save interrupt details for the back-end interrupt handler */
132 sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
133 sc->sc_istat = istat;
134 sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
135
136 /* Deal with the interrupt */
137 osiop_intr(sc);
138
139 return 1;
140 }
141