FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/tcom.c
1 /* $NetBSD: tcom.c,v 1.7 2003/01/01 00:10:21 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 Eric S. Hvozda.
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 /*
40 * Copyright (c) 1998 Jukka Marin. All rights reserved.
41 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
42 * Copyright (c) 1995 Charles Hannum. All rights reserved.
43 *
44 * This code is derived from public-domain software written by
45 * Roland McGrath.
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 * 1. Redistributions of source code must retain the above copyright
51 * notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. All advertising materials mentioning features or use of this software
56 * must display the following acknowledgement:
57 * This product includes software developed by Charles Hannum.
58 * 4. The name of the author may not be used to endorse or promote products
59 * derived from this software without specific prior written permission.
60 *
61 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
64 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
65 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
66 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
67 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
70 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
71 */
72
73 /*
74 * NOTE: This driver has been tested in TCOM "UNIX mode" with base address
75 * set to 0x100 or 0x200 and baud rate jumpers to "normal". This code
76 * does NOT know about the 2x and 4x baud rates available on TCOM cards.
77 */
78
79 #include <sys/cdefs.h>
80 __KERNEL_RCSID(0, "$NetBSD: tcom.c,v 1.7 2003/01/01 00:10:21 thorpej Exp $");
81
82 #include <sys/param.h>
83 #include <sys/systm.h>
84 #include <sys/device.h>
85 #include <sys/termios.h>
86
87 #include <machine/bus.h>
88 #include <machine/intr.h>
89
90 #include <dev/ic/comreg.h>
91 #include <dev/ic/comvar.h>
92
93 #include <dev/isa/isavar.h>
94 #include <dev/isa/com_multi.h>
95
96 #define NSLAVES 8 /* TCOM cards have 4 or 8 UARTs */
97 #define STATUS_OFFSET 0x40 /* offset from board base address */
98 #define STATUS_SIZE 8 /* 8 bytes reserved for irq status */
99
100 struct tcom_softc {
101 struct device sc_dev;
102 void *sc_ih;
103
104 bus_space_tag_t sc_iot;
105 int sc_iobase;
106
107 int sc_alive; /* mask of slave units attached */
108 void *sc_slaves[NSLAVES]; /* com device unit numbers */
109 bus_space_handle_t sc_slaveioh[NSLAVES];
110 bus_space_handle_t sc_statusioh;
111 };
112
113 int tcomprobe __P((struct device *, struct cfdata *, void *));
114 void tcomattach __P((struct device *, struct device *, void *));
115 int tcomintr __P((void *));
116 int tcomprint __P((void *, const char *));
117
118 CFATTACH_DECL(tcom, sizeof(struct tcom_softc),
119 tcomprobe, tcomattach, NULL, NULL);
120
121 int
122 tcomprobe(parent, self, aux)
123 struct device *parent;
124 struct cfdata *self;
125 void *aux;
126 {
127 struct isa_attach_args *ia = aux;
128 bus_space_tag_t iot = ia->ia_iot;
129 bus_space_handle_t ioh;
130 int i, iobase, rv = 1;
131
132 /*
133 * Do the normal com probe for the first UART and assume
134 * its presence, and the ability to map the other UARTS,
135 * means there is a multiport board there.
136 * XXX Needs more robustness.
137 */
138
139 if (ia->ia_nio < 1)
140 return (0);
141 if (ia->ia_nirq < 1)
142 return (1);
143
144 if (ISA_DIRECT_CONFIG(ia))
145 return (0);
146
147 /* Disallow wildcarded i/o address. */
148 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
149 return (0);
150 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT)
151 return (0);
152
153 /* if the first port is in use as console, then it. */
154 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
155 goto checkmappings;
156
157 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
158 rv = 0;
159 goto out;
160 }
161 rv = comprobe1(iot, ioh);
162 bus_space_unmap(iot, ioh, COM_NPORTS);
163 if (rv == 0)
164 goto out;
165
166 checkmappings:
167 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
168 iobase += COM_NPORTS;
169
170 if (com_is_console(iot, iobase, 0))
171 continue;
172
173 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
174 rv = 0;
175 goto out;
176 }
177 bus_space_unmap(iot, ioh, COM_NPORTS);
178 }
179
180 out:
181 if (rv) {
182 ia->ia_nio = 1;
183 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
184
185 ia->ia_nirq = 1;
186
187 ia->ia_niomem = 0;
188 ia->ia_ndrq = 0;
189 }
190 return (rv);
191 }
192
193 int
194 tcomprint(aux, pnp)
195 void *aux;
196 const char *pnp;
197 {
198 struct commulti_attach_args *ca = aux;
199
200 if (pnp)
201 aprint_normal("com at %s", pnp);
202 aprint_normal(" slave %d", ca->ca_slave);
203 return (UNCONF);
204 }
205
206 void
207 tcomattach(parent, self, aux)
208 struct device *parent, *self;
209 void *aux;
210 {
211 struct tcom_softc *sc = (void *)self;
212 struct isa_attach_args *ia = aux;
213 struct commulti_attach_args ca;
214 bus_space_tag_t iot = ia->ia_iot;
215 int i, iobase;
216
217 printf("\n");
218
219 sc->sc_iot = ia->ia_iot;
220 sc->sc_iobase = ia->ia_io[0].ir_addr;
221
222 for (i = 0; i < NSLAVES; i++) {
223 iobase = sc->sc_iobase + i * COM_NPORTS;
224 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
225 bus_space_map(iot, iobase, COM_NPORTS, 0,
226 &sc->sc_slaveioh[i])) {
227 printf("%s: can't map i/o space for slave %d\n",
228 sc->sc_dev.dv_xname, i);
229 return;
230 }
231 }
232
233 if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0,
234 &sc->sc_statusioh)) {
235 printf("%s: can't map status space\n", sc->sc_dev.dv_xname);
236 return;
237 }
238
239 for (i = 0; i < NSLAVES; i++) {
240 ca.ca_slave = i;
241 ca.ca_iot = sc->sc_iot;
242 ca.ca_ioh = sc->sc_slaveioh[i];
243 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
244 ca.ca_noien = 0;
245
246 sc->sc_slaves[i] = config_found(self, &ca, tcomprint);
247 if (sc->sc_slaves[i] != NULL)
248 sc->sc_alive |= 1 << i;
249 }
250
251 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
252 IST_EDGE, IPL_SERIAL, tcomintr, sc);
253 }
254
255 int
256 tcomintr(arg)
257 void *arg;
258 {
259 struct tcom_softc *sc = arg;
260 bus_space_tag_t iot = sc->sc_iot;
261 int alive = sc->sc_alive;
262 int bits;
263
264 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
265 if (bits == 0)
266 return (0);
267
268 for (;;) {
269 #define TRY(n) \
270 if (bits & (1 << (n))) \
271 comintr(sc->sc_slaves[n]);
272 TRY(0);
273 TRY(1);
274 TRY(2);
275 TRY(3);
276 TRY(4);
277 TRY(5);
278 TRY(6);
279 TRY(7);
280 #undef TRY
281 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive;
282 if (bits == 0)
283 return (1);
284 }
285 }
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