1 /* $NetBSD: wdc_obio.c,v 1.11 2023/12/20 15:00:08 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum and by Onno van der Linden.
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_obio.c,v 1.11 2023/12/20 15:00:08 thorpej Exp $");
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39
40 #include <sys/bus.h>
41 #include <machine/intr.h>
42
43 #include <dev/ata/atavar.h>
44 #include <dev/ic/wdcvar.h>
45
46 #include <landisk/dev/obiovar.h>
47
48 struct wdc_obio_softc {
49 struct wdc_softc sc_wdcdev;
50 struct ata_channel *sc_chanlist[1];
51 struct ata_channel sc_channel;
52 struct wdc_regs sc_wdc_regs;
53 void *sc_ih;
54 };
55
56 static int wdc_obio_probe(device_t, cfdata_t, void *);
57 static void wdc_obio_attach(device_t, device_t, void *);
58
59 CFATTACH_DECL_NEW(wdc_obio, sizeof(struct wdc_obio_softc),
60 wdc_obio_probe, wdc_obio_attach, NULL, NULL);
61
62 #define WDC_OBIO_REG_NPORTS WDC_NREG
63 #define WDC_OBIO_REG_SIZE (WDC_OBIO_REG_NPORTS * 2)
64 #define WDC_OBIO_AUXREG_NPORTS 1
65 #define WDC_OBIO_AUXREG_SIZE (WDC_OBIO_AUXREG_NPORTS * 2)
66 #define WDC_OBIO_AUXREG_OFFSET 0x2c
67
68 static int
wdc_obio_probe(device_t parent,cfdata_t cfp,void * aux)69 wdc_obio_probe(device_t parent, cfdata_t cfp, void *aux)
70 {
71 struct obio_attach_args *oa = aux;
72 struct wdc_regs wdr;
73 int result = 0;
74 int i;
75
76 if (oa->oa_nio < 1)
77 return (0);
78 if (oa->oa_nirq < 1)
79 return (0);
80
81 if (oa->oa_io[0].or_addr == IOBASEUNK)
82 return (0);
83 if (oa->oa_irq[0].or_irq == IRQUNK)
84 return (0);
85
86 wdr.cmd_iot = oa->oa_iot;
87 if (bus_space_map(wdr.cmd_iot, oa->oa_io[0].or_addr,
88 WDC_OBIO_REG_SIZE, 0, &wdr.cmd_baseioh)) {
89 goto out;
90 }
91 for (i = 0; i < WDC_OBIO_REG_NPORTS; i++) {
92 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh,
93 i * 2, (i == 0) ? 2 : 1, &wdr.cmd_iohs[i])) {
94 goto outunmap;
95 }
96 }
97 wdc_init_shadow_regs(&wdr);
98
99 wdr.ctl_iot = oa->oa_iot;
100 if (bus_space_map(wdr.ctl_iot,
101 oa->oa_io[0].or_addr + WDC_OBIO_AUXREG_OFFSET,
102 WDC_OBIO_AUXREG_SIZE, 0, &wdr.ctl_ioh)) {
103 goto outunmap;
104 }
105
106 result = wdcprobe(&wdr);
107 if (result) {
108 oa->oa_nio = 1;
109 oa->oa_io[0].or_size = WDC_OBIO_REG_SIZE;
110 oa->oa_nirq = 1;
111 oa->oa_niomem = 0;
112 }
113
114 bus_space_unmap(wdr.ctl_iot, wdr.ctl_ioh, WDC_OBIO_AUXREG_SIZE);
115 outunmap:
116 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, WDC_OBIO_REG_SIZE);
117 out:
118 return (result);
119 }
120
121 static void
wdc_obio_attach(device_t parent,device_t self,void * aux)122 wdc_obio_attach(device_t parent, device_t self, void *aux)
123 {
124 struct wdc_obio_softc *sc = device_private(self);
125 struct obio_attach_args *oa = aux;
126 struct wdc_regs *wdr;
127 int i;
128
129 aprint_naive("\n");
130 aprint_normal("\n");
131
132 sc->sc_wdcdev.sc_atac.atac_dev = self;
133 sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;
134
135 wdr->cmd_iot = oa->oa_iot;
136 wdr->ctl_iot = oa->oa_iot;
137 if (bus_space_map(wdr->cmd_iot, oa->oa_io[0].or_addr,
138 WDC_OBIO_REG_SIZE, 0, &wdr->cmd_baseioh)
139 || bus_space_map(wdr->ctl_iot,
140 oa->oa_io[0].or_addr + WDC_OBIO_AUXREG_OFFSET,
141 WDC_OBIO_AUXREG_SIZE, 0, &wdr->ctl_ioh)) {
142 aprint_error_dev(self, "couldn't map registers\n");
143 return;
144 }
145
146 for (i = 0; i < WDC_OBIO_REG_NPORTS; i++) {
147 if (bus_space_subregion(wdr->cmd_iot,
148 wdr->cmd_baseioh, i * 2, (i == 0) ? 2 : 1,
149 &wdr->cmd_iohs[i]) != 0) {
150 aprint_error_dev(self,
151 "couldn't subregion registers\n");
152 return;
153 }
154 }
155
156 sc->sc_ih = obio_intr_establish(oa->oa_irq[0].or_irq, IPL_BIO, wdcintr,
157 &sc->sc_channel);
158
159 sc->sc_wdcdev.cap |= WDC_CAPABILITY_PREATA;
160 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16;
161 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
162 sc->sc_chanlist[0] = &sc->sc_channel;
163 sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
164 sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
165 sc->sc_wdcdev.wdc_maxdrives = 2;
166 sc->sc_channel.ch_channel = 0;
167 sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
168
169 wdc_init_shadow_regs(wdr);
170
171 wdcattach(&sc->sc_channel);
172 }
173