wdc_ofisa.c revision 1.35 
1/*	$NetBSD: wdc_ofisa.c,v 1.35 2017/10/10 05:35:15 jdolecek Exp $	*/
2
3/*
4 * Copyright 1997, 1998
5 * Digital Equipment Corporation. All rights reserved.
6 *
7 * This software is furnished under license and may be used and
8 * copied only in accordance with the following terms and conditions.
9 * Subject to these conditions, you may download, copy, install,
10 * use, modify and distribute this software in source and/or binary
11 * form. No title or ownership is transferred hereby.
12 *
13 * 1) Any source code used, modified or distributed must reproduce
14 *    and retain this copyright notice and list of conditions as
15 *    they appear in the source file.
16 *
17 * 2) No right is granted to use any trade name, trademark, or logo of
18 *    Digital Equipment Corporation. Neither the "Digital Equipment
19 *    Corporation" name nor any trademark or logo of Digital Equipment
20 *    Corporation may be used to endorse or promote products derived
21 *    from this software without the prior written permission of
22 *    Digital Equipment Corporation.
23 *
24 * 3) This software is provided "AS-IS" and any express or implied
25 *    warranties, including but not limited to, any implied warranties
26 *    of merchantability, fitness for a particular purpose, or
27 *    non-infringement are disclaimed. In no event shall DIGITAL be
28 *    liable for any damages whatsoever, and in particular, DIGITAL
29 *    shall not be liable for special, indirect, consequential, or
30 *    incidental damages or damages for lost profits, loss of
31 *    revenue or loss of use, whether such damages arise in contract,
32 *    negligence, tort, under statute, in equity, at law or otherwise,
33 *    even if advised of the possibility of such damage.
34 */
35
36/*
37 * OFW Attachment for 'wdc' disk controller driver
38 */
39
40#include <sys/cdefs.h>
41__KERNEL_RCSID(0, "$NetBSD: wdc_ofisa.c,v 1.35 2017/10/10 05:35:15 jdolecek Exp $");
42
43#include <sys/param.h>
44#include <sys/device.h>
45#include <sys/systm.h>
46#include <sys/tty.h>
47#include <sys/malloc.h>
48
49#include <sys/intr.h>
50#include <sys/bus.h>
51
52#include <dev/ofw/openfirm.h>
53#include <dev/isa/isavar.h>
54#include <dev/ofisa/ofisavar.h>
55
56#include <dev/ic/wdcreg.h>		/* ??? */
57#include <dev/ata/atavar.h>
58#include <dev/ic/wdcvar.h>
59
60struct wdc_ofisa_softc {
61	struct wdc_softc sc_wdcdev;
62	struct ata_channel *sc_chanlist[1];
63	struct ata_channel sc_channel;
64	struct wdc_regs wdc_regs;
65	void	*sc_ih;
66};
67
68static int wdc_ofisa_probe(device_t, cfdata_t, void *);
69static void wdc_ofisa_attach(device_t, device_t, void *);
70
71CFATTACH_DECL_NEW(wdc_ofisa, sizeof(struct wdc_ofisa_softc),
72    wdc_ofisa_probe, wdc_ofisa_attach, NULL, NULL);
73
74static int
75wdc_ofisa_probe(device_t parent, cfdata_t cf, void *aux)
76{
77	struct ofisa_attach_args *aa = aux;
78	static const char *const compatible_strings[] = { "pnpPNP,600", NULL };
79	int rv = 0;
80
81	if (of_compatible(aa->oba.oba_phandle, compatible_strings) != -1)
82		rv = 5;
83#ifdef _WDC_OFISA_MD_MATCH
84	if (!rv)
85		rv = wdc_ofisa_md_match(parent, cf, aux);
86#endif
87	return (rv);
88}
89
90static void
91wdc_ofisa_attach(device_t parent, device_t self, void *aux)
92{
93	struct wdc_ofisa_softc *sc = device_private(self);
94	struct wdc_regs *wdr;
95	struct ofisa_attach_args *aa = aux;
96	struct ofisa_reg_desc reg[2];
97	struct ofisa_intr_desc intr;
98	int n;
99	bus_space_handle_t ioh;
100
101	/*
102	 * We're living on an ofw.  We have to ask the OFW what our
103	 * registers and interrupts properties look like.
104	 *
105	 * We expect exactly two register regions and one interrupt.
106	 */
107
108	sc->sc_wdcdev.sc_atac.atac_dev = self;
109	sc->sc_wdcdev.regs = wdr = &sc->wdc_regs;
110
111	n = ofisa_reg_get(aa->oba.oba_phandle, reg, 2);
112#ifdef _WDC_OFISA_MD_REG_FIXUP
113	n = wdc_ofisa_md_reg_fixup(parent, self, aux, reg, 2, n);
114#endif
115	if (n != 2) {
116		aprint_error(": error getting register data\n");
117		return;
118	}
119	if (reg[0].len != 8 || reg[1].len != 2) {
120		aprint_error(": weird register size (%lu/%lu, expected 8/2)\n",
121		    (unsigned long)reg[0].len, (unsigned long)reg[1].len);
122		return;
123	}
124
125	n = ofisa_intr_get(aa->oba.oba_phandle, &intr, 1);
126#ifdef _WDC_OFISA_MD_INTR_FIXUP
127	n = wdc_ofisa_md_intr_fixup(parent, self, aux, &intr, 1, n);
128#endif
129	if (n != 1) {
130		aprint_error(": error getting interrupt data\n");
131		return;
132	}
133
134	wdr->cmd_iot = (reg[0].type == OFISA_REG_TYPE_IO) ? aa->iot : aa->memt;
135	wdr->ctl_iot = (reg[1].type == OFISA_REG_TYPE_IO) ? aa->iot : aa->memt;
136        if (bus_space_map(wdr->cmd_iot, reg[0].addr, 8, 0, &ioh) ||
137            bus_space_map(wdr->ctl_iot, reg[1].addr, 1, 0,
138	      &wdr->ctl_ioh)) {
139                aprint_error(": can't map register spaces\n");
140		return;
141        }
142	wdr->cmd_baseioh = ioh;
143
144	for (n = 0; n < WDC_NREG; n++) {
145		if (bus_space_subregion(wdr->cmd_iot, ioh, n,
146		    n == 0 ? 4 : 1, &wdr->cmd_iohs[n]) != 0) {
147                	aprint_error(": can't subregion register space\n");
148			return;
149		}
150	}
151
152	sc->sc_ih = isa_intr_establish(aa->ic, intr.irq, intr.share,
153	    IPL_BIO, wdcintr, &sc->sc_channel);
154
155	aprint_normal("\n");
156	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16;
157	sc->sc_chanlist[0] = &sc->sc_channel;
158	sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
159	sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
160	sc->sc_wdcdev.wdc_maxdrives = 2;
161	sc->sc_channel.ch_channel = 0;
162	sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
163	sc->sc_channel.ch_queue = ata_queue_alloc(1);
164	wdc_init_shadow_regs(wdr);
165
166	wdcattach(&sc->sc_channel);
167
168#if 0
169	aprint_verbose_dev(self, "registers: ");
170	ofisa_reg_print(reg, 2);
171	aprint_verbose("\n");
172	aprint_verbose_dev(self, "interrupts: ");
173	ofisa_intr_print(&intr, 1);
174	aprint_verbose("\n");
175#endif
176}
177