1 /* $NetBSD: wdc_amiga.c,v 1.41 2023/12/20 00:40:42 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Michael L. Hitch.
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 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: wdc_amiga.c,v 1.41 2023/12/20 00:40:42 thorpej Exp $");
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39 #include <sys/bus.h>
40
41 #include <machine/cpu.h>
42 #include <machine/intr.h>
43 #include <sys/bswap.h>
44
45 #include <amiga/amiga/cia.h>
46 #include <amiga/amiga/custom.h>
47 #include <amiga/amiga/device.h>
48 #include <amiga/amiga/gayle.h>
49 #include <amiga/dev/zbusvar.h>
50
51 #include <dev/ata/atavar.h>
52 #include <dev/ic/wdcvar.h>
53
54 struct wdc_amiga_softc {
55 struct wdc_softc sc_wdcdev;
56 struct ata_channel *sc_chanlist[1];
57 struct ata_channel sc_channel;
58 struct wdc_regs sc_wdc_regs;
59 struct isr sc_isr;
60 struct bus_space_tag cmd_iot;
61 struct bus_space_tag ctl_iot;
62 bool gayle_intr;
63 };
64
65 int wdc_amiga_probe(device_t, cfdata_t, void *);
66 void wdc_amiga_attach(device_t, device_t, void *);
67 int wdc_amiga_intr(void *);
68
69 CFATTACH_DECL_NEW(wdc_amiga, sizeof(struct wdc_amiga_softc),
70 wdc_amiga_probe, wdc_amiga_attach, NULL, NULL);
71
72 int
wdc_amiga_probe(device_t parent,cfdata_t cfp,void * aux)73 wdc_amiga_probe(device_t parent, cfdata_t cfp, void *aux)
74 {
75 if ((!is_a4000() && !is_a1200() && !is_a600()) ||
76 !matchname(aux, "wdc"))
77 return(0);
78 return 1;
79 }
80
81 void
wdc_amiga_attach(device_t parent,device_t self,void * aux)82 wdc_amiga_attach(device_t parent, device_t self, void *aux)
83 {
84 struct wdc_amiga_softc *sc = device_private(self);
85 struct wdc_regs *wdr;
86 int i;
87
88 aprint_normal("\n");
89
90 sc->sc_wdcdev.sc_atac.atac_dev = self;
91 sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;
92
93 gayle_init();
94
95 if (is_a4000()) {
96 sc->cmd_iot.base = (bus_addr_t) ztwomap(GAYLE_IDE_BASE_A4000 + 2);
97 sc->gayle_intr = false;
98 } else {
99 sc->cmd_iot.base = (bus_addr_t) ztwomap(GAYLE_IDE_BASE + 2);
100 sc->gayle_intr = true;
101 }
102
103 sc->cmd_iot.absm = sc->ctl_iot.absm = &amiga_bus_stride_4swap;
104 wdr->cmd_iot = &sc->cmd_iot;
105 wdr->ctl_iot = &sc->ctl_iot;
106
107 if (bus_space_map(wdr->cmd_iot, 0, 0x40, 0,
108 &wdr->cmd_baseioh)) {
109 aprint_error_dev(self, "couldn't map registers\n");
110 return;
111 }
112
113 for (i = 0; i < WDC_NREG; i++) {
114 if (bus_space_subregion(wdr->cmd_iot,
115 wdr->cmd_baseioh, i, i == 0 ? 4 : 1,
116 &wdr->cmd_iohs[i]) != 0) {
117
118 bus_space_unmap(wdr->cmd_iot,
119 wdr->cmd_baseioh, 0x40);
120 aprint_error_dev(self, "couldn't map registers\n");
121 return;
122 }
123 }
124
125 if (bus_space_subregion(wdr->cmd_iot,
126 wdr->cmd_baseioh, 0x406, 1, &wdr->ctl_ioh))
127 return;
128
129 sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA16;
130 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
131 sc->sc_chanlist[0] = &sc->sc_channel;
132 sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
133 sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
134 sc->sc_wdcdev.wdc_maxdrives = 2;
135 sc->sc_channel.ch_channel = 0;
136 sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
137
138 wdc_init_shadow_regs(wdr);
139
140 sc->sc_isr.isr_intr = wdc_amiga_intr;
141 sc->sc_isr.isr_arg = sc;
142 sc->sc_isr.isr_ipl = 2;
143 add_isr (&sc->sc_isr);
144
145 if (sc->gayle_intr)
146 gayle_intr_enable_set(GAYLE_INT_IDE);
147
148 wdcattach(&sc->sc_channel);
149 }
150
151 int
wdc_amiga_intr(void * arg)152 wdc_amiga_intr(void *arg)
153 {
154 struct wdc_amiga_softc *sc;
155 uint8_t intreq;
156 int ret;
157
158 sc = (struct wdc_amiga_softc *)arg;
159 ret = 0;
160 intreq = gayle_intr_status();
161
162 if (intreq & GAYLE_INT_IDE) {
163 if (sc->gayle_intr)
164 gayle_intr_ack(0x7C | (intreq & GAYLE_INT_IDEACK));
165 ret = wdcintr(&sc->sc_channel);
166 }
167
168 return ret;
169 }
170
171