1 /* $NetBSD: tcom.c,v 1.22 2021/08/07 16:19:12 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 * 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 1.22 2021/08/07 16:19:12 thorpej 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 device_t 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 softc pointers */ 102 bus_space_handle_t sc_slaveioh[NSLAVES]; 103 bus_space_handle_t sc_statusioh; 104 }; 105 106 int tcomprobe(device_t, cfdata_t, void *); 107 void tcomattach(device_t, device_t, void *); 108 int tcomintr(void *); 109 110 CFATTACH_DECL_NEW(tcom, sizeof(struct tcom_softc), 111 tcomprobe, tcomattach, NULL, NULL); 112 113 int 114 tcomprobe(device_t parent, cfdata_t self, void *aux) 115 { 116 struct isa_attach_args *ia = aux; 117 bus_space_tag_t iot = ia->ia_iot; 118 bus_space_handle_t ioh; 119 int i, iobase, rv = 1; 120 121 /* 122 * Do the normal com probe for the first UART and assume 123 * its presence, and the ability to map the other UARTS, 124 * means there is a multiport board there. 125 * XXX Needs more robustness. 126 */ 127 128 if (ia->ia_nio < 1) 129 return (0); 130 if (ia->ia_nirq < 1) 131 return (1); 132 133 if (ISA_DIRECT_CONFIG(ia)) 134 return (0); 135 136 /* Disallow wildcarded i/o address. */ 137 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 138 return (0); 139 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 140 return (0); 141 142 /* if the first port is in use as console, then it. */ 143 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0)) 144 goto checkmappings; 145 146 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) { 147 rv = 0; 148 goto out; 149 } 150 rv = comprobe1(iot, ioh); 151 bus_space_unmap(iot, ioh, COM_NPORTS); 152 if (rv == 0) 153 goto out; 154 155 checkmappings: 156 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) { 157 iobase += COM_NPORTS; 158 159 if (com_is_console(iot, iobase, 0)) 160 continue; 161 162 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 163 rv = 0; 164 goto out; 165 } 166 bus_space_unmap(iot, ioh, COM_NPORTS); 167 } 168 169 out: 170 if (rv) { 171 ia->ia_nio = 1; 172 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 173 174 ia->ia_nirq = 1; 175 176 ia->ia_niomem = 0; 177 ia->ia_ndrq = 0; 178 } 179 return (rv); 180 } 181 182 void 183 tcomattach(device_t parent, device_t self, void *aux) 184 { 185 struct tcom_softc *sc = device_private(self); 186 struct isa_attach_args *ia = aux; 187 struct commulti_attach_args ca; 188 bus_space_tag_t iot = ia->ia_iot; 189 int i, iobase; 190 device_t slave; 191 192 printf("\n"); 193 194 sc->sc_dev = self; 195 sc->sc_iot = ia->ia_iot; 196 sc->sc_iobase = ia->ia_io[0].ir_addr; 197 198 for (i = 0; i < NSLAVES; i++) { 199 iobase = sc->sc_iobase + i * COM_NPORTS; 200 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 201 bus_space_map(iot, iobase, COM_NPORTS, 0, 202 &sc->sc_slaveioh[i])) { 203 aprint_error_dev(sc->sc_dev, 204 "can't map i/o space for slave %d\n", i); 205 return; 206 } 207 } 208 209 if (bus_space_map(iot, sc->sc_iobase + STATUS_OFFSET, STATUS_SIZE, 0, 210 &sc->sc_statusioh)) { 211 aprint_error_dev(sc->sc_dev, "can't map status space\n"); 212 return; 213 } 214 215 for (i = 0; i < NSLAVES; i++) { 216 ca.ca_slave = i; 217 ca.ca_iot = sc->sc_iot; 218 ca.ca_ioh = sc->sc_slaveioh[i]; 219 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS; 220 ca.ca_noien = 0; 221 222 slave = config_found(self, &ca, commultiprint, CFARGS_NONE); 223 if (slave != NULL) { 224 sc->sc_alive |= 1 << i; 225 sc->sc_slaves[i] = device_private(slave); 226 } 227 } 228 229 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 230 IST_EDGE, IPL_SERIAL, tcomintr, sc); 231 } 232 233 int 234 tcomintr(void *arg) 235 { 236 struct tcom_softc *sc = arg; 237 bus_space_tag_t iot = sc->sc_iot; 238 int alive = sc->sc_alive; 239 int bits; 240 241 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 242 if (bits == 0) 243 return (0); 244 245 for (;;) { 246 #define TRY(n) \ 247 if (bits & (1 << (n))) \ 248 comintr(sc->sc_slaves[n]); 249 TRY(0); 250 TRY(1); 251 TRY(2); 252 TRY(3); 253 TRY(4); 254 TRY(5); 255 TRY(6); 256 TRY(7); 257 #undef TRY 258 bits = ~bus_space_read_1(iot, sc->sc_statusioh, 0) & alive; 259 if (bits == 0) 260 return (1); 261 } 262 } 263
Indexes created Sat Sep 20 22:09:52 GMT 2025