tcom.c revision 1.3
1 /* $NetBSD: tcom.c,v 1.3 2002/01/07 21:47:13 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 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 1.3 2002/01/07 21:47:13 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 struct cfattach tcom_ca = { 119 sizeof(struct tcom_softc), tcomprobe, tcomattach 120 }; 121 122 int 123 tcomprobe(parent, self, aux) 124 struct device *parent; 125 struct cfdata *self; 126 void *aux; 127 { 128 struct isa_attach_args *ia = aux; 129 bus_space_tag_t iot = ia->ia_iot; 130 bus_space_handle_t ioh; 131 int i, iobase, rv = 1; 132 133 /* 134 * Do the normal com probe for the first UART and assume 135 * its presence, and the ability to map the other UARTS, 136 * means there is a multiport board there. 137 * XXX Needs more robustness. 138 */ 139 140 if (ia->ia_nio < 1) 141 return (0); 142 if (ia->ia_nirq < 1) 143 return (1); 144 145 if (ISA_DIRECT_CONFIG(ia)) 146 return (0); 147 148 /* Disallow wildcarded i/o address. */ 149 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 150 return (0); 151 if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT) 152 return (0); 153 154 /* if the first port is in use as console, then it. */ 155 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 156 goto checkmappings; 157 158 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 159 rv = 0; 160 goto out; 161 } 162 rv = comprobe1(iot, ioh); 163 bus_space_unmap(iot, ioh, COM_NPORTS); 164 if (rv == 0) 165 goto out; 166 167 checkmappings: 168 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 169 iobase += COM_NPORTS; 170 171 if (com_is_console(iot, iobase, 0)) 172 continue; 173 174 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 175 rv = 0; 176 goto out; 177 } 178 bus_space_unmap(iot, ioh, COM_NPORTS); 179 } 180 181 out: 182 if (rv) { 183 ia->ia_nio = 1; 184 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 185 186 ia->ia_nirq = 1; 187 188 ia->ia_niomem = 0; 189 ia->ia_ndrq = 0; 190 } 191 return (rv); 192 } 193 194 int 195 tcomprint(aux, pnp) 196 void *aux; 197 const char *pnp; 198 { 199 struct commulti_attach_args *ca = aux; 200 201 if (pnp) 202 printf("com at %s", pnp); 203 printf(" slave %d", ca->ca_slave); 204 return (UNCONF); 205 } 206 207 void 208 tcomattach(parent, self, aux) 209 struct device *parent, *self; 210 void *aux; 211 { 212 struct tcom_softc *sc = (void *)self; 213 struct isa_attach_args *ia = aux; 214 struct commulti_attach_args ca; 215 bus_space_tag_t iot = ia->ia_iot; 216 int i, iobase; 217 218 printf("\n"); 219 220 sc->sc_iot = ia->ia_iot; 221 sc->sc_iobase = ia->ia_io[0].ir_addr; 222 223 for (i = 0; i < NSLAVES; i++) { 224 iobase = sc->sc_iobase + i * COM_NPORTS; 225 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 226 bus_space_map(iot, iobase, COM_NPORTS, 0, 227 &sc->sc_slaveioh[i])) { 228 printf("%s: can't map i/o space for slave %d\n", 229 sc->sc_dev.dv_xname, i); 230 return; 231 } 232 } 233 234 if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0, 235 &sc->sc_statusioh)) { 236 printf("%s: can't map status space\n", sc->sc_dev.dv_xname); 237 return; 238 } 239 240 for (i = 0; i < NSLAVES; i++) { 241 ca.ca_slave = i; 242 ca.ca_iot = sc->sc_iot; 243 ca.ca_ioh = sc->sc_slaveioh[i]; 244 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 245 ca.ca_noien = 0; 246 247 sc->sc_slaves[i] = config_found(self, &ca, tcomprint); 248 if (sc->sc_slaves[i] != NULL) 249 sc->sc_alive |= 1 << i; 250 } 251 252 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 253 IST_EDGE, IPL_SERIAL, tcomintr, sc); 254 } 255 256 int 257 tcomintr(arg) 258 void *arg; 259 { 260 struct tcom_softc *sc = arg; 261 bus_space_tag_t iot = sc->sc_iot; 262 int alive = sc->sc_alive; 263 int bits; 264 265 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 266 if (bits == 0) 267 return (0); 268 269 for (;;) { 270 #define TRY(n) \ 271 if (bits & (1 << (n))) \ 272 comintr(sc->sc_slaves[n]); 273 TRY(0); 274 TRY(1); 275 TRY(2); 276 TRY(3); 277 TRY(4); 278 TRY(5); 279 TRY(6); 280 TRY(7); 281 #undef TRY 282 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 283 if (bits == 0) 284 return (1); 285 } 286 } 287
Indexes created Thu Sep 25 06:09:39 GMT 2025