1 /* $NetBSD: addcom_isa.c,v 1.17 2008/04/08 20:08:49 cegger Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Michael Graff. All rights reserved. 5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 7 * 8 * This code is derived from public-domain software written by 9 * Roland McGrath, and information provided by David Muir Sharnoff. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Charles M. Hannum. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * This code was written and tested with the Addonics FlexPort 8S. 39 * It has 8 ports, using 16650-compatible chips, sharing a single 40 * interrupt. 41 * 42 * An interrupt status register exists at 0x240, according to the 43 * skimpy documentation supplied. It doesn't change depending on 44 * io base address, so only one of these cards can ever be used at 45 * a time. 46 * 47 * This card is different from the boca or other cards in that ports 48 * 0..5 are from addresses 0x108..0x137, and 6..7 are from 0x200..0x20f, 49 * making a gap that the other cards do not have. 50 * 51 * The addresses which are documented are 0x108, 0x1108, 0x1d08, and 52 * 0x8508, for the base (port 0) address. 53 * 54 * --Michael <explorer@NetBSD.org> -- April 21, 2000 55 */ 56 57 #include <sys/cdefs.h> 58 __KERNEL_RCSID(0, "$NetBSD: addcom_isa.c,v 1.17 2008/04/08 20:08:49 cegger Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/device.h> 63 #include <sys/termios.h> 64 65 #include <sys/bus.h> 66 #include <sys/intr.h> 67 68 #include <dev/ic/comreg.h> 69 #include <dev/ic/comvar.h> 70 71 #include <dev/isa/isavar.h> 72 #include <dev/isa/com_multi.h> 73 74 #define NSLAVES 8 75 76 /* 77 * Grr. This card always uses 0x420 for the status register, regardless 78 * of io base address. 79 */ 80 #define STATUS_IOADDR 0x420 81 #define STATUS_SIZE 8 /* May be bogus... */ 82 83 struct addcom_softc { 84 struct device sc_dev; 85 void *sc_ih; 86 87 bus_space_tag_t sc_iot; 88 int sc_iobase; 89 90 int sc_alive; /* mask of slave units attached */ 91 void *sc_slaves[NSLAVES]; /* com device unit numbers */ 92 bus_space_handle_t sc_slaveioh[NSLAVES]; 93 bus_space_handle_t sc_statusioh; 94 }; 95 96 #define SLAVE_IOBASE_OFFSET 0x108 97 static int slave_iobases[8] = { 98 0x108, /* port 0, base port */ 99 0x110, 100 0x118, 101 0x120, 102 0x128, 103 0x130, 104 0x200, /* port 7, note address skip... */ 105 0x208 106 }; 107 108 int addcomprobe(struct device *, struct cfdata *, void *); 109 void addcomattach(struct device *, struct device *, void *); 110 int addcomintr(void *); 111 112 CFATTACH_DECL(addcom_isa, sizeof(struct addcom_softc), 113 addcomprobe, addcomattach, NULL, NULL); 114 115 int 116 addcomprobe(struct device *parent, struct cfdata *self, 117 void *aux) 118 { 119 struct isa_attach_args *ia = aux; 120 bus_space_tag_t iot = ia->ia_iot; 121 bus_space_handle_t ioh; 122 int i, iobase, rv = 1; 123 124 /* 125 * Do the normal com probe for the first UART and assume 126 * its presence, and the ability to map the other UARTS, 127 * means there is a multiport board there. 128 * XXX Needs more robustness. 129 */ 130 131 if (ia->ia_nio < 1) 132 return (0); 133 if (ia->ia_nirq < 1) 134 return (0); 135 136 if (ISA_DIRECT_CONFIG(ia)) 137 return (0); 138 139 /* Disallow wildcarded i/o address. */ 140 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 141 return (0); 142 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 143 return (0); 144 145 iobase = ia->ia_io[0].ir_addr; 146 147 /* if the first port is in use as console, then it. */ 148 if (com_is_console(iot, iobase, 0)) 149 goto checkmappings; 150 151 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 152 rv = 0; 153 goto out; 154 } 155 rv = comprobe1(iot, ioh); 156 bus_space_unmap(iot, ioh, COM_NPORTS); 157 if (rv == 0) 158 goto out; 159 160 checkmappings: 161 for (i = 1; i < NSLAVES; i++) { 162 iobase += slave_iobases[i] - slave_iobases[i - 1]; 163 164 if (com_is_console(iot, iobase, 0)) 165 continue; 166 167 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) { 168 rv = 0; 169 goto out; 170 } 171 bus_space_unmap(iot, ioh, COM_NPORTS); 172 } 173 174 out: 175 if (rv) { 176 ia->ia_nio = 1; 177 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS; 178 179 ia->ia_nirq = 1; 180 181 ia->ia_niomem = 0; 182 ia->ia_ndrq = 0; 183 } 184 return (rv); 185 } 186 187 void 188 addcomattach(struct device *parent, struct device *self, void *aux) 189 { 190 struct addcom_softc *sc = (void *)self; 191 struct isa_attach_args *ia = aux; 192 struct commulti_attach_args ca; 193 bus_space_tag_t iot = ia->ia_iot; 194 int i, iobase; 195 196 printf("\n"); 197 198 sc->sc_iot = ia->ia_iot; 199 sc->sc_iobase = ia->ia_io[0].ir_addr; 200 201 if (bus_space_map(iot, STATUS_IOADDR, STATUS_SIZE, 202 0, &sc->sc_statusioh)) { 203 aprint_error_dev(&sc->sc_dev, "can't map status space\n"); 204 return; 205 } 206 207 for (i = 0; i < NSLAVES; i++) { 208 iobase = sc->sc_iobase 209 + slave_iobases[i] 210 - SLAVE_IOBASE_OFFSET; 211 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) && 212 bus_space_map(iot, iobase, COM_NPORTS, 0, 213 &sc->sc_slaveioh[i])) { 214 aprint_error_dev(&sc->sc_dev, "can't map i/o space for slave %d\n", i); 215 return; 216 } 217 } 218 219 for (i = 0; i < NSLAVES; i++) { 220 ca.ca_slave = i; 221 ca.ca_iot = sc->sc_iot; 222 ca.ca_ioh = sc->sc_slaveioh[i]; 223 ca.ca_iobase = sc->sc_iobase 224 + slave_iobases[i] 225 - SLAVE_IOBASE_OFFSET; 226 ca.ca_noien = 0; 227 228 sc->sc_slaves[i] = config_found(self, &ca, commultiprint); 229 if (sc->sc_slaves[i] != NULL) 230 sc->sc_alive |= 1 << i; 231 } 232 233 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 234 IST_EDGE, IPL_SERIAL, addcomintr, sc); 235 } 236 237 int 238 addcomintr(void *arg) 239 { 240 struct addcom_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