1 /* $NetBSD: tcom.c,v 1.15 2008/04/08 20:08:50 cegger 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 1.15 2008/04/08 20:08:50 cegger 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 <sys/bus.h> 88 #include <sys/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(struct device *, struct cfdata *, void *); 114 void tcomattach(struct device *, struct device *, void *); 115 int tcomintr(void *); 116 117 CFATTACH_DECL(tcom, sizeof(struct tcom_softc), 118 tcomprobe, tcomattach, NULL, NULL); 119 120 int 121 tcomprobe(struct device *parent, struct cfdata *self, 122 void *aux) 123 { 124 struct isa_attach_args *ia = aux; 125 bus_space_tag_t iot = ia->ia_iot; 126 bus_space_handle_t ioh; 127 int i, iobase, rv = 1; 128 129 /* 130 * Do the normal com probe for the first UART and assume 131 * its presence, and the ability to map the other UARTS, 132 * means there is a multiport board there. 133 * XXX Needs more robustness. 134 */ 135 136 if (ia->ia_nio < 1) 137 return (0); 138 if (ia->ia_nirq < 1) 139 return (1); 140 141 if (ISA_DIRECT_CONFIG(ia)) 142 return (0); 143 144 /* Disallow wildcarded i/o address. */ 145 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 146 return (0); 147 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 148 return (0); 149 150 /* if the first port is in use as console, then it. */ 151 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 152 goto checkmappings; 153 154 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 155 rv = 0; 156 goto out; 157 } 158 rv = comprobe1(iot, ioh); 159 bus_space_unmap(iot, ioh, COM_NPORTS); 160 if (rv == 0) 161 goto out; 162 163 checkmappings: 164 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 165 iobase += COM_NPORTS; 166 167 if (com_is_console(iot, iobase, 0)) 168 continue; 169 170 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 171 rv = 0; 172 goto out; 173 } 174 bus_space_unmap(iot, ioh, COM_NPORTS); 175 } 176 177 out: 178 if (rv) { 179 ia->ia_nio = 1; 180 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 181 182 ia->ia_nirq = 1; 183 184 ia->ia_niomem = 0; 185 ia->ia_ndrq = 0; 186 } 187 return (rv); 188 } 189 190 void 191 tcomattach(struct device *parent, struct device *self, void *aux) 192 { 193 struct tcom_softc *sc = (void *)self; 194 struct isa_attach_args *ia = aux; 195 struct commulti_attach_args ca; 196 bus_space_tag_t iot = ia->ia_iot; 197 int i, iobase; 198 199 printf("\n"); 200 201 sc->sc_iot = ia->ia_iot; 202 sc->sc_iobase = ia->ia_io[0].ir_addr; 203 204 for (i = 0; i < NSLAVES; i++) { 205 iobase = sc->sc_iobase + i * COM_NPORTS; 206 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 207 bus_space_map(iot, iobase, COM_NPORTS, 0, 208 &sc->sc_slaveioh[i])) { 209 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 210 return; 211 } 212 } 213 214 if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0, 215 &sc->sc_statusioh)) { 216 aprint_error_dev(&sc->sc_dev, "can't map status space\n"); 217 return; 218 } 219 220 for (i = 0; i < NSLAVES; i++) { 221 ca.ca_slave = i; 222 ca.ca_iot = sc->sc_iot; 223 ca.ca_ioh = sc->sc_slaveioh[i]; 224 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 225 ca.ca_noien = 0; 226 227 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 228 if (sc->sc_slaves[i] != NULL) 229 sc->sc_alive |= 1 << i; 230 } 231 232 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 233 IST_EDGE, IPL_SERIAL, tcomintr, sc); 234 } 235 236 int 237 tcomintr(arg) 238 void *arg; 239 { 240 struct tcom_softc *sc = arg; 241 bus_space_tag_t iot = sc->sc_iot; 242 int alive = sc->sc_alive; 243 int bits; 244 245 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 246 if (bits == 0) 247 return (0); 248 249 for (;;) { 250 #define TRY(n) \ 251 if (bits & (1 << (n))) \ 252 comintr(sc->sc_slaves[n]); 253 TRY(0); 254 TRY(1); 255 TRY(2); 256 TRY(3); 257 TRY(4); 258 TRY(5); 259 TRY(6); 260 TRY(7); 261 #undef TRY 262 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 263 if (bits == 0) 264 return (1); 265 } 266 } 267