1 /* $NetBSD: com_obio.c,v 1.25 2018/12/08 17:46:13 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*-
33 * Copyright (c) 1991 The Regents of the University of California.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)com.c 7.5 (Berkeley) 5/16/91
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: com_obio.c,v 1.25 2018/12/08 17:46:13 thorpej Exp $");
65
66 #include <sys/param.h>
67 #include <sys/systm.h>
68 #include <sys/ioctl.h>
69 #include <sys/select.h>
70 #include <sys/tty.h>
71 #include <sys/proc.h>
72 #include <sys/conf.h>
73 #include <sys/file.h>
74 #include <sys/uio.h>
75 #include <sys/kernel.h>
76 #include <sys/syslog.h>
77 #include <sys/types.h>
78 #include <sys/device.h>
79 #include <sys/termios.h>
80
81 #include <sys/bus.h>
82 #include <machine/autoconf.h>
83 #include <machine/intr.h>
84
85 #include <dev/ic/comreg.h>
86 #include <dev/ic/comvar.h>
87
88 #include <sparc/sparc/auxreg.h>
89
90 struct com_obio_softc {
91 struct com_softc osc_com; /* real "com" softc */
92
93 int osc_tadpole; /* is this on a tadpole */
94 /* OBIO-specific goo. */
95 struct evcnt osc_intrcnt; /* interrupt counting */
96 };
97
98 static int com_obio_match(device_t, cfdata_t , void *);
99 static void com_obio_attach(device_t, device_t, void *);
100
101 CFATTACH_DECL_NEW(com_obio, sizeof(struct com_obio_softc),
102 com_obio_match, com_obio_attach, NULL, NULL);
103
104 static int
com_obio_match(device_t parent,cfdata_t cf,void * aux)105 com_obio_match(device_t parent, cfdata_t cf, void *aux)
106 {
107 union obio_attach_args *uoba = aux;
108 struct sbus_attach_args *sa = &uoba->uoba_sbus;
109 int tadpole = 0;
110 int need_probe = 0;
111 int rv = 0;
112 uint8_t auxregval = 0;
113
114 if (uoba->uoba_isobio4 != 0) {
115 return (0);
116 }
117
118 /*
119 * Tadpole 3GX/3GS uses "modem" for a 16450 port
120 * (We need to enable it before probing)
121 */
122 if (strcmp("modem", sa->sa_name) == 0) {
123 auxregval = *AUXIO4M_REG;
124 *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE);
125 DELAY(100);
126 tadpole = 1;
127 need_probe = 1;
128 }
129
130 /*
131 * Sun JavaStation 1 uses "su" for a 16550 port
132 */
133 if (strcmp("su", sa->sa_name) == 0) {
134 need_probe = 1;
135 }
136
137 if (need_probe) {
138 bus_space_handle_t ioh;
139
140 if (sbus_bus_map(sa->sa_bustag,
141 sa->sa_slot, sa->sa_offset, sa->sa_size,
142 BUS_SPACE_MAP_LINEAR, &ioh) == 0) {
143 rv = comprobe1(sa->sa_bustag, ioh);
144 #if 0
145 printf("modem: probe: lcr=0x%02x iir=0x%02x\n",
146 bus_space_read_1(sa->sa_bustag, ioh, 3),
147 bus_space_read_1(sa->sa_bustag, ioh, 2));
148 #endif
149 bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size);
150 }
151 }
152
153 /* Disable the com port if tadpole */
154 if (tadpole)
155 *AUXIO4M_REG = auxregval;
156
157 return (rv);
158 }
159
160 static void
com_obio_attach(device_t parent,device_t self,void * aux)161 com_obio_attach(device_t parent, device_t self, void *aux)
162 {
163 struct com_obio_softc *osc = device_private(self);
164 struct com_softc *sc = &osc->osc_com;
165 union obio_attach_args *uoba = aux;
166 struct sbus_attach_args *sa = &uoba->uoba_sbus;
167 bus_space_handle_t ioh;
168 bus_space_tag_t iot;
169 bus_addr_t iobase;
170
171 sc->sc_dev = self;
172
173 if (strcmp("modem", sa->sa_name) == 0) {
174 osc->osc_tadpole = 1;
175 }
176
177 /*
178 * We're living on an obio that looks like an sbus slot.
179 */
180 iot = sa->sa_bustag;
181 iobase = sa->sa_offset;
182 sc->sc_frequency = COM_FREQ;
183
184 /*
185 * XXX: It would be nice to be able to split console input and
186 * output to different devices. For now switch to serial
187 * console if PROM stdin is on serial (so that we can use DDB).
188 */
189 if (prom_instance_to_package(prom_stdin()) == sa->sa_node)
190 comcnattach(iot, iobase, B9600, sc->sc_frequency,
191 COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8));
192
193 if (!com_is_console(iot, iobase, &ioh) &&
194 sbus_bus_map(iot, sa->sa_slot, iobase, sa->sa_size,
195 BUS_SPACE_MAP_LINEAR, &ioh) != 0) {
196 aprint_error(": can't map registers\n");
197 return;
198 }
199
200 com_init_regs(&sc->sc_regs, iot, ioh, iobase);
201
202 if (osc->osc_tadpole) {
203 *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE);
204 do {
205 DELAY(100);
206 } while (!com_probe_subr(&sc->sc_regs));
207 #if 0
208 printf("modem: attach: lcr=0x%02x iir=0x%02x\n",
209 bus_space_read_1(sc->sc_regs.iot, sc->sc_regs.ioh, 3),
210 bus_space_read_1(sc->sc_regs.iot, sc->sc_regs.ioh, 2));
211 #endif
212 }
213
214 com_attach_subr(sc);
215
216 if (sa->sa_nintr != 0) {
217 (void)bus_intr_establish(sc->sc_regs.cr_iot, sa->sa_pri,
218 IPL_SERIAL, comintr, sc);
219 evcnt_attach_dynamic(&osc->osc_intrcnt, EVCNT_TYPE_INTR, NULL,
220 device_xname(self), "intr");
221 }
222
223 if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
224 aprint_error_dev(self, "could not establish shutdown hook");
225 }
226 }
227