xref: /netbsd-src/sys/arch/powerpc/ibm4xx/dev/com_opb.c (revision 8b0f9554ff8762542c4defc4f70e1eb76fb508fa)
1 /* $NetBSD: com_opb.c,v 1.19 2007/02/22 16:57:57 thorpej 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 1.19 2007/02/22 16:57:57 thorpej Exp $");
65 
66 #include <sys/param.h>
67 #include <sys/device.h>
68 #include <sys/tty.h>
69 #include <sys/systm.h>
70 
71 #include <lib/libkern/libkern.h>
72 
73 #include <machine/cpu.h>
74 
75 #include <powerpc/ibm4xx/dev/opbvar.h>
76 #include <powerpc/ibm4xx/dev/comopbvar.h>
77 
78 #include "com.h"
79 #if (NCOM > 0)
80 #include <dev/ic/comreg.h>
81 #include <dev/ic/comvar.h>
82 #endif
83 
84 struct com_opb_softc {
85 	struct com_softc sc_com;
86 	void *sc_ih;
87 };
88 
89 static int	com_opb_probe(struct device *, struct cfdata *, void *);
90 static void	com_opb_attach(struct device *, struct device *, void *);
91 
92 CFATTACH_DECL(com_opb, sizeof(struct com_opb_softc),
93     com_opb_probe, com_opb_attach, NULL, NULL);
94 
95 int
96 com_opb_probe(struct device *parent, struct cfdata *cf, void *aux)
97 {
98 	struct opb_attach_args *oaa = aux;
99 
100 	/* match only com devices */
101 	if (strcmp(oaa->opb_name, cf->cf_name) != 0)
102 		return 0;
103 
104 	return (1);
105 }
106 
107 void
108 com_opb_attach(struct device *parent, struct device *self, void *aux)
109 {
110 	struct com_opb_softc *msc = (void *)self;
111 	struct com_softc *sc = &msc->sc_com;
112 	struct opb_attach_args *oaa = aux;
113 	prop_number_t freq;
114 	bus_space_handle_t ioh;
115 
116 	/* XXX console check */
117 
118 	bus_space_map(oaa->opb_bt, oaa->opb_addr, COM_NPORTS, 0, &ioh);
119 	COM_INIT_REGS(sc->sc_regs, oaa->opb_bt, ioh, oaa->opb_addr);
120 
121 	freq = prop_dictionary_get(device_properties(&sc->sc_dev),
122 	    "clock-frequency");
123 	if (freq == NULL) {
124 		printf(": unable to get clock-frequency property\n");
125 		return;
126 	}
127 	KASSERT(prop_object_type(freq) == PROP_TYPE_NUMBER);
128 	sc->sc_frequency = (int) prop_number_integer_value(freq);
129 
130 	com_attach_subr(sc);
131 
132 	intr_establish(oaa->opb_irq, IST_LEVEL, IPL_SERIAL, comintr, sc);
133 }
134 
135 /*
136  * com_opb_cnattach:
137  * Initialize the system console.
138  */
139 void
140 com_opb_cnattach(int com_freq, int conaddr, int conspeed, int conmode)
141 {
142 	static int attached = 0;
143 #if (NCOM > 0)
144 	struct com_regs	regs;
145 #endif
146 
147 	if (attached)
148 		return;
149 	attached = 1;
150 
151 #if (NCOM > 0)
152 	/* We *know* the com-console attaches to opb */
153 	regs.cr_iot = opb_get_bus_space_tag();
154 	regs.cr_iobase = conaddr;
155 	regs.cr_nports = COM_NPORTS;
156 	/* regs.ioh is initialized by comcnattach */
157 
158 	if (comcnattach1(&regs, conspeed, com_freq, COM_TYPE_NORMAL, conmode))
159 		panic("can't init serial console @%x", conaddr);
160 	else
161 		return;
162 #endif
163 	panic("console device missing -- serial console not in kernel");
164 	/* Of course, this is moot if there is no console... */
165 }
166 
167 /*
168  * com_opb_device_register:
169  */
170 void
171 com_opb_device_register(struct device *dev, int frequency)
172 {
173 	/* Set the frequency of the on-chip UART. */
174 	prop_number_t pn = prop_number_create_integer(frequency);
175 	KASSERT(pn != NULL);
176 
177 	if (prop_dictionary_set(device_properties(dev),
178 				"clock-frequency", pn) == false) {
179 		printf("WARNING: unable to set clock-frequency "
180 			"property for %s\n", dev->dv_xname);
181 	}
182 	prop_object_release(pn);
183 }
184