1 /* $NetBSD: com_opb.c,v 1.25 2021/02/27 20:43:58 rin Exp $ */
2
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Copyright (c) 1998
40 * Matthias Drochner. All rights reserved.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
54 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
60 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: com_opb.c,v 1.25 2021/02/27 20:43:58 rin Exp $");
65
66 #include "com.h"
67
68 #include <sys/param.h>
69 #include <sys/device.h>
70 #include <sys/tty.h>
71 #include <sys/systm.h>
72 #include <sys/cpu.h>
73
74 #include <lib/libkern/libkern.h>
75
76 #include <powerpc/ibm4xx/cpu.h>
77
78 #include <powerpc/ibm4xx/dev/opbvar.h>
79 #include <powerpc/ibm4xx/dev/comopbvar.h>
80
81 #if (NCOM > 0)
82 #include <dev/ic/comreg.h>
83 #include <dev/ic/comvar.h>
84 #endif
85
86 struct com_opb_softc {
87 struct com_softc sc_com;
88 void *sc_ih;
89 };
90
91 static int com_opb_probe(device_t, cfdata_t , void *);
92 static void com_opb_attach(device_t, device_t, void *);
93
94 CFATTACH_DECL_NEW(com_opb, sizeof(struct com_opb_softc),
95 com_opb_probe, com_opb_attach, NULL, NULL);
96
97 int
com_opb_probe(device_t parent,cfdata_t cf,void * aux)98 com_opb_probe(device_t parent, cfdata_t cf, void *aux)
99 {
100 struct opb_attach_args *oaa = aux;
101
102 /* match only com devices */
103 if (strcmp(oaa->opb_name, cf->cf_name) != 0)
104 return 0;
105
106 return (1);
107 }
108
109 void
com_opb_attach(device_t parent,device_t self,void * aux)110 com_opb_attach(device_t parent, device_t self, void *aux)
111 {
112 struct com_opb_softc *msc = device_private(self);
113 struct com_softc *sc = &msc->sc_com;
114 struct opb_attach_args *oaa = aux;
115 prop_number_t freq;
116 bus_space_handle_t ioh;
117
118 sc->sc_dev = self;
119
120 /* XXX console check */
121
122 bus_space_map(oaa->opb_bt, oaa->opb_addr, COM_NPORTS, 0, &ioh);
123 com_init_regs(&sc->sc_regs, oaa->opb_bt, ioh, oaa->opb_addr);
124
125 freq = prop_dictionary_get(device_properties(sc->sc_dev),
126 "clock-frequency");
127 if (freq == NULL) {
128 aprint_error(": unable to get clock-frequency property\n");
129 return;
130 }
131 KASSERT(prop_object_type(freq) == PROP_TYPE_NUMBER);
132 sc->sc_frequency = (int) prop_number_integer_value(freq);
133
134 com_attach_subr(sc);
135
136 intr_establish_xname(oaa->opb_irq, IST_LEVEL, IPL_SERIAL, comintr, sc,
137 device_xname(self));
138 }
139
140 /*
141 * com_opb_cnattach:
142 * Initialize the system console.
143 */
144 void
com_opb_cnattach(int com_freq,int conaddr,int conspeed,int conmode)145 com_opb_cnattach(int com_freq, int conaddr, int conspeed, int conmode)
146 {
147 static int attached = 0;
148
149 if (attached)
150 return;
151 attached = 1;
152
153 #if (NCOM > 0)
154 /* We *know* the com-console attaches to opb */
155 if (comcnattach(opb_get_bus_space_tag(), conaddr, conspeed, com_freq,
156 COM_TYPE_NORMAL, conmode))
157 panic("can't init serial console @%x", conaddr);
158 else
159 return;
160 #endif
161 panic("console device missing -- serial console not in kernel");
162 /* Of course, this is moot if there is no console... */
163 }
164
165 /*
166 * com_opb_device_register:
167 */
168 void
com_opb_device_register(device_t dev,int frequency)169 com_opb_device_register(device_t dev, int frequency)
170 {
171 /* Set the frequency of the on-chip UART. */
172 prop_number_t pn = prop_number_create_integer(frequency);
173 KASSERT(pn != NULL);
174
175 if (prop_dictionary_set(device_properties(dev),
176 "clock-frequency", pn) == false) {
177 printf("WARNING: unable to set clock-frequency "
178 "property for %s\n", device_xname(dev));
179 }
180 prop_object_release(pn);
181 }
182