1 /* $NetBSD: osiop_pcctwo.c,v 1.14 2009/03/23 18:59:57 scw Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 * Front-end attachment code for the ncr53c710 SCSI controller
34 * on mvme68k/mvme88k boards.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: osiop_pcctwo.c,v 1.14 2009/03/23 18:59:57 scw Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/device.h>
44
45 #include <dev/scsipi/scsi_all.h>
46 #include <dev/scsipi/scsipi_all.h>
47 #include <dev/scsipi/scsiconf.h>
48
49 #include <sys/cpu.h>
50 #include <sys/bus.h>
51 #include <machine/autoconf.h>
52
53 #include <dev/ic/osiopreg.h>
54 #include <dev/ic/osiopvar.h>
55
56 #include <dev/mvme/pcctworeg.h>
57 #include <dev/mvme/pcctwovar.h>
58
59 #include "ioconf.h"
60
61 int osiop_pcctwo_match(device_t, cfdata_t, void *);
62 void osiop_pcctwo_attach(device_t, device_t, void *);
63
64 struct osiop_pcctwo_softc {
65 struct osiop_softc sc_osiop;
66 struct evcnt sc_evcnt;
67 };
68
69 CFATTACH_DECL_NEW(osiop_pcctwo, sizeof(struct osiop_pcctwo_softc),
70 osiop_pcctwo_match, osiop_pcctwo_attach, NULL, NULL);
71
72 static int osiop_pcctwo_intr(void *);
73
74 /* ARGSUSED */
75 int
osiop_pcctwo_match(device_t parent,cfdata_t cf,void * args)76 osiop_pcctwo_match(device_t parent, cfdata_t cf, void *args)
77 {
78 struct pcctwo_attach_args *pa;
79 bus_space_handle_t bsh;
80 int rv;
81
82 pa = args;
83
84 if (strcmp(pa->pa_name, osiop_cd.cd_name))
85 return (0);
86
87 /*
88 * See if the SCSI controller is responding.
89 */
90 if (bus_space_map(pa->pa_bust, pa->pa_offset, OSIOP_NREGS, 0, &bsh))
91 return (0);
92 rv = bus_space_peek_1(pa->pa_bust, bsh, OSIOP_CTEST8, NULL);
93 bus_space_unmap(pa->pa_bust, bsh, OSIOP_NREGS);
94 if (rv)
95 return (0);
96
97 pa->pa_ipl = cf->pcctwocf_ipl;
98
99 return (1);
100 }
101
102 /* ARGSUSED */
103 void
osiop_pcctwo_attach(device_t parent,device_t self,void * aux)104 osiop_pcctwo_attach(device_t parent, device_t self, void *aux)
105 {
106 struct pcctwo_attach_args *pa;
107 struct osiop_pcctwo_softc *sc;
108 int clk, ctest7;
109
110 sc = device_private(self);
111 pa = aux;
112
113 /*
114 * On the '17x the siop's clock is the same as the CPU clock.
115 * On the other boards, the siop runs at twice the CPU clock.
116 * Also, the 17x cannot do proper bus-snooping (the 68060 is
117 * lame in this repspect) so don't enable it on that board.
118 */
119 #ifdef MVME68K
120 if (machineid == MVME_172 || machineid == MVME_177) {
121 clk = cpuspeed;
122 ctest7 = 0;
123 } else {
124 clk = cpuspeed * 2;
125 ctest7 = OSIOP_CTEST7_SC0;
126 }
127 #else
128 #error Set up siop clock speed for mvme187
129 #endif
130
131 sc->sc_osiop.sc_dev = self;
132 sc->sc_osiop.sc_bst = pa->pa_bust;
133 sc->sc_osiop.sc_dmat = pa->pa_dmat;
134 (void) bus_space_map(sc->sc_osiop.sc_bst, pa->pa_offset, OSIOP_NREGS,
135 0, &sc->sc_osiop.sc_reg);
136
137 sc->sc_osiop.sc_clock_freq = clk;
138 sc->sc_osiop.sc_ctest7 = ctest7 | OSIOP_CTEST7_TT1;
139 sc->sc_osiop.sc_dcntl = OSIOP_DCNTL_EA;
140 sc->sc_osiop.sc_id = 7; /* XXX: Could use NVRAM setting */
141
142 /* Attach main MI driver */
143 osiop_attach(&sc->sc_osiop);
144
145 /* Register the event counter */
146 evcnt_attach_dynamic(&sc->sc_evcnt, EVCNT_TYPE_INTR,
147 pcctwointr_evcnt(pa->pa_ipl), "disk",
148 device_xname(sc->sc_osiop.sc_dev));
149
150 /* Hook the chip's interrupt */
151 pcctwointr_establish(PCCTWOV_SCSI, osiop_pcctwo_intr, pa->pa_ipl, sc,
152 &sc->sc_evcnt);
153 }
154
155 static int
osiop_pcctwo_intr(void * arg)156 osiop_pcctwo_intr(void *arg)
157 {
158 struct osiop_pcctwo_softc *sc = arg;
159 u_char istat;
160
161 /*
162 * Catch any errors which can happen when the SIOP is
163 * local bus master...
164 */
165 istat = pcc2_reg_read(sys_pcctwo, PCC2REG_SCSI_ERR_STATUS);
166 if ((istat & PCCTWO_ERR_SR_MASK) != 0) {
167 printf("%s: Local bus error: 0x%02x\n",
168 device_xname(sc->sc_osiop.sc_dev), istat);
169 istat |= PCCTWO_ERR_SR_SCLR;
170 pcc2_reg_write(sys_pcctwo, PCC2REG_SCSI_ERR_STATUS, istat);
171 }
172
173 /* This is potentially nasty, since the IRQ is level triggered... */
174 if (sc->sc_osiop.sc_flags & OSIOP_INTSOFF)
175 return (0);
176
177 istat = osiop_read_1(&sc->sc_osiop, OSIOP_ISTAT);
178
179 if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
180 return (0);
181
182 /* Save interrupt details for the back-end interrupt handler */
183 sc->sc_osiop.sc_sstat0 = osiop_read_1(&sc->sc_osiop, OSIOP_SSTAT0);
184 sc->sc_osiop.sc_istat = istat;
185 sc->sc_osiop.sc_dstat = osiop_read_1(&sc->sc_osiop, OSIOP_DSTAT);
186
187 /* Deal with the interrupt */
188 osiop_intr(&sc->sc_osiop);
189
190 return (1);
191 }
192