1 /* $OpenBSD: asio.c,v 1.12 2022/03/13 13:34:54 mpi Exp $ */
2
3 /*
4 * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Effort sponsored in part by the Defense Advanced Research Projects
29 * Agency (DARPA) and Air Force Research Laboratory, Air Force
30 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
31 *
32 */
33
34 /*
35 * Driver for Aurora 210SJ serial ports.
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/device.h>
42 #include <sys/conf.h>
43 #include <sys/timeout.h>
44 #include <sys/tty.h>
45
46 #include <machine/bus.h>
47 #include <machine/autoconf.h>
48 #include <machine/openfirm.h>
49
50 #include <dev/sbus/sbusvar.h>
51 #include <dev/sbus/asioreg.h>
52 #include <dev/ic/comvar.h>
53
54 #include "asio.h"
55
56 #define BAUD_BASE (1843200)
57
58 struct asio_port {
59 u_int8_t ap_inten;
60 bus_space_handle_t ap_bh;
61 struct device *ap_dev;
62 };
63
64 struct asio_softc {
65 struct device sc_dev;
66 bus_space_tag_t sc_bt;
67 bus_space_handle_t sc_csr_h;
68 void *sc_ih;
69 struct asio_port sc_ports[2];
70 int sc_nports;
71 };
72
73 struct asio_attach_args {
74 char *aaa_name;
75 int aaa_port;
76 bus_space_tag_t aaa_iot;
77 bus_space_handle_t aaa_ioh;
78 u_int32_t aaa_pri;
79 u_int8_t aaa_inten;
80 };
81
82 int asio_match(struct device *, void *, void *);
83 void asio_attach(struct device *, struct device *, void *);
84 int asio_print(void *, const char *);
85 void asio_intr_enable(struct device *, u_int8_t);
86
87 const struct cfattach asio_ca = {
88 sizeof(struct asio_softc), asio_match, asio_attach
89 };
90
91 struct cfdriver asio_cd = {
92 NULL, "asio", DV_DULL
93 };
94
95 int
asio_match(struct device * parent,void * match,void * aux)96 asio_match(struct device *parent, void *match, void *aux)
97 {
98 struct sbus_attach_args *sa = aux;
99
100 if (strcmp(sa->sa_name, "sio2") == 0)
101 return (1);
102 return (0);
103 }
104
105 void
asio_attach(struct device * parent,struct device * self,void * aux)106 asio_attach(struct device *parent, struct device *self, void *aux)
107 {
108 struct asio_softc *sc = (void *)self;
109 struct sbus_attach_args *sa = aux;
110 struct asio_attach_args aaa;
111 int i;
112 char *model;
113
114 sc->sc_bt = sa->sa_bustag;
115 sc->sc_nports = 2;
116
117 model = getpropstring(sa->sa_node, "model");
118 if (model == NULL) {
119 printf(": empty model, unsupported\n");
120 return;
121 }
122 if (strcmp(model, "210sj") != 0) {
123 printf(": unsupported model %s\n", model);
124 return;
125 }
126
127 if (sa->sa_nreg < 3) {
128 printf(": %d registers expected, got %d\n",
129 3, sa->sa_nreg);
130 return;
131 }
132
133 if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[0].sbr_slot,
134 sa->sa_reg[0].sbr_offset, sa->sa_reg[0].sbr_size,
135 0, 0, &sc->sc_csr_h)) {
136 printf(": couldn't map csr\n");
137 return;
138 }
139
140 for (i = 0; i < sc->sc_nports; i++) {
141 if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[i + 1].sbr_slot,
142 sa->sa_reg[i + 1].sbr_offset, sa->sa_reg[i + 1].sbr_size,
143 0, 0, &sc->sc_ports[i].ap_bh)) {
144 printf(": couldn't map uart%d\n", i);
145 return;
146 }
147 }
148
149 sc->sc_ports[0].ap_inten = ASIO_CSR_SJ_UART0_INTEN;
150 sc->sc_ports[1].ap_inten = ASIO_CSR_UART1_INTEN;
151
152 printf(": %s\n", model);
153
154 for (i = 0; i < sc->sc_nports; i++) {
155 aaa.aaa_name = "com";
156 aaa.aaa_port = i;
157 aaa.aaa_iot = sc->sc_bt;
158 aaa.aaa_ioh = sc->sc_ports[i].ap_bh;
159 aaa.aaa_inten = sc->sc_ports[i].ap_inten;
160 aaa.aaa_pri = sa->sa_intr[0].sbi_pri;
161 sc->sc_ports[i].ap_dev = config_found(self, &aaa, asio_print);
162 }
163 }
164
165 int
asio_print(void * aux,const char * name)166 asio_print(void *aux, const char *name)
167 {
168 struct asio_attach_args *aaa = aux;
169
170 if (name != NULL)
171 printf("%s at %s", aaa->aaa_name, name);
172 printf(" port %d", aaa->aaa_port);
173 return (UNCONF);
174 }
175
176 #if NCOM_ASIO > 0
177 int com_asio_match(struct device *, void *, void *);
178 void com_asio_attach(struct device *, struct device *, void *);
179
180 const struct cfattach com_asio_ca = {
181 sizeof(struct com_softc), com_asio_match, com_asio_attach
182 };
183
184 void
asio_intr_enable(struct device * dv,u_int8_t en)185 asio_intr_enable(struct device *dv, u_int8_t en)
186 {
187 struct asio_softc *sc = (struct asio_softc *)dv;
188 u_int8_t csr;
189
190 csr = bus_space_read_1(sc->sc_bt, sc->sc_csr_h, 0);
191 csr &= ~(ASIO_CSR_SBUS_INT7 | ASIO_CSR_SBUS_INT6);
192 csr |= ASIO_CSR_SBUS_INT5 | en;
193 bus_space_write_1(sc->sc_bt, sc->sc_csr_h, 0, csr);
194 }
195
196 int
com_asio_match(struct device * parent,void * match,void * aux)197 com_asio_match(struct device *parent, void *match, void *aux)
198 {
199 return (1);
200 }
201
202 void
com_asio_attach(struct device * parent,struct device * self,void * aux)203 com_asio_attach(struct device *parent, struct device *self, void *aux)
204 {
205 struct com_softc *sc = (struct com_softc *)self;
206 struct asio_attach_args *aaa = aux;
207
208 sc->sc_iot = aaa->aaa_iot;
209 sc->sc_ioh = aaa->aaa_ioh;
210 sc->sc_iobase = 0; /* XXX WTF is iobase for? It used to be the lower 32 bits of ioh's vaddr... */
211 sc->sc_hwflags = 0;
212 sc->sc_swflags = 0;
213 sc->sc_frequency = BAUD_BASE;
214
215 sc->sc_ih = bus_intr_establish(aaa->aaa_iot, aaa->aaa_pri,
216 IPL_TTY, 0, comintr, sc, self->dv_xname);
217 if (sc->sc_ih == NULL) {
218 printf(": cannot allocate intr\n");
219 return;
220 }
221 asio_intr_enable(parent, aaa->aaa_inten);
222
223 com_attach_subr(sc);
224 }
225 #endif
226