1/*	$NetBSD: com_ofisa.c,v 1.20 2021/01/27 03:10:21 thorpej 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 'com' serial driver
38 */
39
40#include <sys/cdefs.h>
41__KERNEL_RCSID(0, "$NetBSD: com_ofisa.c,v 1.20 2021/01/27 03:10:21 thorpej Exp $");
42
43#include <sys/param.h>
44#include <sys/device.h>
45#include <sys/systm.h>
46#include <sys/tty.h>
47
48#include <sys/intr.h>
49#include <sys/bus.h>
50
51#include <dev/ofw/openfirm.h>
52#include <dev/isa/isavar.h>
53#include <dev/ofisa/ofisavar.h>
54
55#include <dev/ic/comreg.h>
56#include <dev/ic/comvar.h>
57
58struct com_ofisa_softc {
59	struct	com_softc sc_com;	/* real "com" softc */
60
61	/* OFW ISA-specific goo. */
62	void	*sc_ih;			/* interrupt handler */
63};
64
65int com_ofisa_probe(device_t, cfdata_t , void *);
66void com_ofisa_attach(device_t, device_t, void *);
67
68CFATTACH_DECL_NEW(com_ofisa, sizeof(struct com_ofisa_softc),
69    com_ofisa_probe, com_ofisa_attach, NULL, NULL);
70
71static const struct device_compatible_entry compat_data[] = {
72	{ .compat = "pnpPNP,501" },
73	DEVICE_COMPAT_EOL
74};
75
76int
77com_ofisa_probe(device_t parent, cfdata_t cf, void *aux)
78{
79	struct ofisa_attach_args *aa = aux;
80	int rv;
81
82	rv = of_compatible_match(aa->oba.oba_phandle, compat_data) ? 5 : 0;
83#ifdef _COM_OFISA_MD_MATCH
84	if (!rv)
85		rv = com_ofisa_md_match(parent, cf, aux);
86#endif
87	return (rv);
88}
89
90void
91com_ofisa_attach(device_t parent, device_t self, void *aux)
92{
93	struct com_ofisa_softc *osc = device_private(self);
94        struct com_softc *sc = &osc->sc_com;
95	struct ofisa_attach_args *aa = aux;
96	struct ofisa_reg_desc reg;
97	struct ofisa_intr_desc intr;
98	bus_space_handle_t ioh;
99	bus_space_tag_t iot;
100	bus_addr_t iobase;
101	int freq;
102	char freqbuf[4];
103	int n;
104
105	sc->sc_dev = self;
106
107	/*
108	 * We're living on an ofw.  We have to ask the OFW what our
109	 * registers and interrupts properties look like.
110	 *
111	 * We expect exactly one register region and one interrupt.
112	 */
113
114	n = ofisa_reg_get(aa->oba.oba_phandle, &reg, 1);
115#ifdef _COM_OFISA_MD_REG_FIXUP
116	n = com_ofisa_md_reg_fixup(parent, self, aux, &reg, 1, n);
117#endif
118	if (n != 1) {
119		aprint_error(": error getting register data\n");
120		return;
121	}
122	if (reg.len != 8) {
123		aprint_error(": weird register size (%lu, expected 8)\n",
124		    (unsigned long)reg.len);
125		return;
126	}
127
128	n = ofisa_intr_get(aa->oba.oba_phandle, &intr, 1);
129#ifdef _COM_OFISA_MD_INTR_FIXUP
130	n = com_ofisa_md_intr_fixup(parent, self, aux, &intr, 1, n);
131#endif
132	if (n != 1) {
133		aprint_error(": error getting interrupt data\n");
134		return;
135	}
136
137	if (OF_getproplen(aa->oba.oba_phandle, "clock-frequency") != 4 ||
138	    OF_getprop(aa->oba.oba_phandle, "clock-frequency", freqbuf,
139	      sizeof freqbuf) != 4)
140		freq = COM_FREQ;
141	else
142		freq = of_decode_int(&freqbuf[0]);
143
144	iot = (reg.type == OFISA_REG_TYPE_IO) ? aa->iot : aa->memt;
145	iobase = reg.addr;
146	sc->sc_frequency = freq;
147
148	if (!com_is_console(iot, iobase, &ioh) &&
149	    bus_space_map(iot, iobase, reg.len, 0, &ioh)) {
150		aprint_error(": can't map register space\n");
151                return;
152        }
153	com_init_regs(&sc->sc_regs, iot, ioh, iobase);
154
155	osc->sc_ih = isa_intr_establish(aa->ic, intr.irq, intr.share,
156	    IPL_SERIAL, comintr, sc);
157
158	com_attach_subr(sc);
159
160#if 0
161	printf("%s: registers: ", device_xname(sc->sc_dev));
162	ofisa_reg_print(&reg, 1);
163	printf("\n");
164	printf("%s: interrupts: ", device_xname(sc->sc_dev));
165	ofisa_intr_print(&intr, 1);
166	printf("\n");
167#endif
168}
169