xref: /netbsd-src/sys/arch/powerpc/ibm4xx/dev/com_opb.c (revision 0ece553e21bb21e22506ec4b07fc6913593f1fa5)
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