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
58 struct 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
65 int com_ofisa_probe(device_t, cfdata_t , void *);
66 void com_ofisa_attach(device_t, device_t, void *);
67
68 CFATTACH_DECL_NEW(com_ofisa, sizeof(struct com_ofisa_softc),
69 com_ofisa_probe, com_ofisa_attach, NULL, NULL);
70
71 static const struct device_compatible_entry compat_data[] = {
72 { .compat = "pnpPNP,501" },
73 DEVICE_COMPAT_EOL
74 };
75
76 int
com_ofisa_probe(device_t parent,cfdata_t cf,void * aux)77 com_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
90 void
com_ofisa_attach(device_t parent,device_t self,void * aux)91 com_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, ®, 1);
115 #ifdef _COM_OFISA_MD_REG_FIXUP
116 n = com_ofisa_md_reg_fixup(parent, self, aux, ®, 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(®, 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