1 /* $NetBSD: obio_wdc.c,v 1.12 2022/09/27 06:36:41 skrll Exp $ */
2
3 /* adapted from iq31244/wdc_obio.c:
4 * NetBSD: wdc_obio.c,v 1.5 2008/04/28 20:23:16 martin Exp
5 */
6
7 /*-
8 * Copyright (c) 1998, 2003, 2005 The NetBSD Foundation, Inc.
9 * All rights reserved.
10 *
11 * This code is derived from software contributed to The NetBSD Foundation
12 * by Charles M. Hannum and by Onno van der Linden.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: obio_wdc.c,v 1.12 2022/09/27 06:36:41 skrll Exp $");
38
39 #include "locators.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/device.h>
44
45 #include <sys/bus.h>
46 #include <machine/intr.h>
47
48 #include <arm/gemini/gemini_var.h>
49 #include <arm/gemini/gemini_reg.h>
50 #include <arm/gemini/gemini_obiovar.h>
51
52 #include <dev/ic/wdcreg.h>
53 #include <dev/ata/atavar.h>
54 #include <dev/ic/wdcvar.h>
55
56 struct wdc_obio_softc {
57 struct wdc_softc sc_wdcdev;
58 struct ata_channel *wdc_chanlist[1];
59 struct ata_channel ata_channel;
60 struct wdc_regs wdc_regs;
61 void *sc_ih;
62 };
63
64 static int wdc_obio_match(device_t, cfdata_t, void *);
65 static void wdc_obio_attach(device_t, device_t, void *);
66
67 CFATTACH_DECL_NEW(wdc_obio, sizeof(struct wdc_obio_softc),
68 wdc_obio_match, wdc_obio_attach, NULL, NULL);
69
70 static int
wdc_obio_match(device_t parent,cfdata_t match,void * aux)71 wdc_obio_match(device_t parent, cfdata_t match, void *aux)
72 {
73 struct obio_attach_args * const obio = aux;
74
75 if (obio->obio_addr == GEMINI_MIDE_BASEn(0)
76 || obio->obio_addr == GEMINI_MIDE_BASEn(1))
77 return 1;
78
79 return 0;
80
81 }
82
83 static void
wdc_obio_attach(device_t parent,device_t self,void * aux)84 wdc_obio_attach(device_t parent, device_t self, void *aux)
85 {
86 struct wdc_obio_softc *sc = device_private(self);
87 struct wdc_regs *wdr;
88 struct obio_attach_args *obio = aux;
89 uint chan;
90 int i;
91
92 /*
93 * we treat the two channels of the Gemini MIDE controller
94 * as separate wdc controllers, because they have
95 * independent interrupts. 'chan' here is a MIDE channel,
96 * (not to be confused with ATA channel).
97 */
98 switch (obio->obio_addr) {
99 case GEMINI_MIDE_BASEn(0):
100 chan = 0;
101 break;
102 case GEMINI_MIDE_BASEn(1):
103 chan = 1;
104 break;
105 default:
106 panic("wdc_obio_attach: bad address");
107 }
108
109 sc->sc_wdcdev.sc_atac.atac_dev = self;
110 sc->sc_wdcdev.regs = wdr = &sc->wdc_regs;
111 wdr->cmd_iot = obio->obio_iot;
112 wdr->ctl_iot = obio->obio_iot;
113 if (bus_space_map(wdr->cmd_iot, obio->obio_addr, GEMINI_MIDE_SIZE,
114 0, &wdr->cmd_baseioh)) {
115 aprint_error(": couldn't map registers\n");
116 return;
117 }
118
119 for (i = 0; i < 8; i++) {
120 if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
121 GEMINI_MIDE_CMDBLK + i, 1, &wdr->cmd_iohs[i]) != 0) {
122 aprint_error(": couldn't subregion registers\n");
123 return;
124 }
125 }
126
127 if (bus_space_subregion(wdr->ctl_iot, wdr->cmd_baseioh,
128 GEMINI_MIDE_CTLBLK, 1, &wdr->ctl_ioh) != 0) {
129 aprint_error(": couldn't subregion registers\n");
130 return;
131 }
132
133 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16;
134
135 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
136 sc->wdc_chanlist[0] = &sc->ata_channel;
137 sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanlist;
138 sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
139 sc->sc_wdcdev.wdc_maxdrives = 2;
140 sc->ata_channel.ch_channel = 0;
141 sc->ata_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
142
143 wdc_init_shadow_regs(wdr);
144
145 aprint_normal("\n");
146
147 if (obio->obio_intr != OBIOCF_INTR_DEFAULT)
148 sc->sc_ih = intr_establish(obio->obio_intr, IPL_BIO, IST_LEVEL_HIGH,
149 wdcintr, &sc->ata_channel);
150 else {
151 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_NOIRQ;
152 aprint_normal_dev(self, "Using polled I/O\n");
153 }
154
155 wdcattach(&sc->ata_channel);
156 }
157