1 /* $NetBSD: tcom.c,v 1.16 2008/04/28 20:23:52 martin 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 * 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) 1998 Jukka Marin. All rights reserved. 34 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 35 * Copyright (c) 1995 Charles Hannum. All rights reserved. 36 * 37 * This code is derived from public-domain software written by 38 * Roland McGrath. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by Charles Hannum. 51 * 4. The name of the author may not be used to endorse or promote products 52 * derived from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 56 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 57 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 58 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 59 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 63 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 /* 67 * NOTE: This driver has been tested in TCOM "UNIX mode" with base address 68 * set to 0x100 or 0x200 and baud rate jumpers to "normal". This code 69 * does NOT know about the 2x and 4x baud rates available on TCOM cards. 70 */ 71 72 #include <sys/cdefs.h> 73 __KERNEL_RCSID(0, "$NetBSD: tcom.c,v 1.16 2008/04/28 20:23:52 martin Exp $"); 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/device.h> 78 #include <sys/termios.h> 79 80 #include <sys/bus.h> 81 #include <sys/intr.h> 82 83 #include <dev/ic/comreg.h> 84 #include <dev/ic/comvar.h> 85 86 #include <dev/isa/isavar.h> 87 #include <dev/isa/com_multi.h> 88 89 #define NSLAVES 8 /* TCOM cards have 4 or 8 UARTs */ 90 #define STATUS_OFFSET 0x40 /* offset from board base address */ 91 #define STATUS_SIZE 8 /* 8 bytes reserved for irq status */ 92 93 struct tcom_softc { 94 struct device sc_dev; 95 void *sc_ih; 96 97 bus_space_tag_t sc_iot; 98 int sc_iobase; 99 100 int sc_alive; /* mask of slave units attached */ 101 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 102 bus_space_handle_t sc_slaveioh[NSLAVES]; 103 bus_space_handle_t sc_statusioh; 104 }; 105 106 int tcomprobe(struct device *, struct cfdata *, void *); 107 void tcomattach(struct device *, struct device *, void *); 108 int tcomintr(void *); 109 110 CFATTACH_DECL(tcom, sizeof(struct tcom_softc), 111 tcomprobe, tcomattach, NULL, NULL); 112 113 int 114 tcomprobe(struct device *parent, struct cfdata *self, 115 void *aux) 116 { 117 struct isa_attach_args *ia = aux; 118 bus_space_tag_t iot = ia->ia_iot; 119 bus_space_handle_t ioh; 120 int i, iobase, rv = 1; 121 122 /* 123 * Do the normal com probe for the first UART and assume 124 * its presence, and the ability to map the other UARTS, 125 * means there is a multiport board there. 126 * XXX Needs more robustness. 127 */ 128 129 if (ia->ia_nio < 1) 130 return (0); 131 if (ia->ia_nirq < 1) 132 return (1); 133 134 if (ISA_DIRECT_CONFIG(ia)) 135 return (0); 136 137 /* Disallow wildcarded i/o address. */ 138 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 139 return (0); 140 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 141 return (0); 142 143 /* if the first port is in use as console, then it. */ 144 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 145 goto checkmappings; 146 147 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 148 rv = 0; 149 goto out; 150 } 151 rv = comprobe1(iot, ioh); 152 bus_space_unmap(iot, ioh, COM_NPORTS); 153 if (rv == 0) 154 goto out; 155 156 checkmappings: 157 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 158 iobase += COM_NPORTS; 159 160 if (com_is_console(iot, iobase, 0)) 161 continue; 162 163 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 164 rv = 0; 165 goto out; 166 } 167 bus_space_unmap(iot, ioh, COM_NPORTS); 168 } 169 170 out: 171 if (rv) { 172 ia->ia_nio = 1; 173 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 174 175 ia->ia_nirq = 1; 176 177 ia->ia_niomem = 0; 178 ia->ia_ndrq = 0; 179 } 180 return (rv); 181 } 182 183 void 184 tcomattach(struct device *parent, struct device *self, void *aux) 185 { 186 struct tcom_softc *sc = (void *)self; 187 struct isa_attach_args *ia = aux; 188 struct commulti_attach_args ca; 189 bus_space_tag_t iot = ia->ia_iot; 190 int i, iobase; 191 192 printf("\n"); 193 194 sc->sc_iot = ia->ia_iot; 195 sc->sc_iobase = ia->ia_io[0].ir_addr; 196 197 for (i = 0; i < NSLAVES; i++) { 198 iobase = sc->sc_iobase + i * COM_NPORTS; 199 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 200 bus_space_map(iot, iobase, COM_NPORTS, 0, 201 &sc->sc_slaveioh[i])) { 202 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 203 return; 204 } 205 } 206 207 if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0, 208 &sc->sc_statusioh)) { 209 aprint_error_dev(&sc->sc_dev, "can't map status space\n"); 210 return; 211 } 212 213 for (i = 0; i < NSLAVES; i++) { 214 ca.ca_slave = i; 215 ca.ca_iot = sc->sc_iot; 216 ca.ca_ioh = sc->sc_slaveioh[i]; 217 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 218 ca.ca_noien = 0; 219 220 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 221 if (sc->sc_slaves[i] != NULL) 222 sc->sc_alive |= 1 << i; 223 } 224 225 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 226 IST_EDGE, IPL_SERIAL, tcomintr, sc); 227 } 228 229 int 230 tcomintr(arg) 231 void *arg; 232 { 233 struct tcom_softc *sc = arg; 234 bus_space_tag_t iot = sc->sc_iot; 235 int alive = sc->sc_alive; 236 int bits; 237 238 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 239 if (bits == 0) 240 return (0); 241 242 for (;;) { 243 #define TRY(n) \ 244 if (bits & (1 << (n))) \ 245 comintr(sc->sc_slaves[n]); 246 TRY(0); 247 TRY(1); 248 TRY(2); 249 TRY(3); 250 TRY(4); 251 TRY(5); 252 TRY(6); 253 TRY(7); 254 #undef TRY 255 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 256 if (bits == 0) 257 return (1); 258 } 259 } 260