pcmcom.c revision 1.19
1 /* $NetBSD: pcmcom.c,v 1.19 2004/08/10 21:14:50 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2000, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by RedBack Networks, Inc. 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 * Device driver for multi-port PCMCIA serial cards, written by 41 * Jason R. Thorpe for RedBack Networks, Inc. 42 * 43 * Most of these cards are simply multiple UARTs sharing a single interrupt 44 * line, and rely on the fact that PCMCIA level-triggered interrupts can 45 * be shared. There are no special interrupt registers on them, as there 46 * are on most ISA multi-port serial cards. 47 * 48 * If there are other cards that have interrupt registers, they should not 49 * be glued into this driver. Rather, separate drivers should be written 50 * for those devices, as we have in the ISA multi-port serial card case. 51 */ 52 53 #include <sys/cdefs.h> 54 __KERNEL_RCSID(0, "$NetBSD: pcmcom.c,v 1.19 2004/08/10 21:14:50 mycroft Exp $"); 55 56 #include <sys/param.h> 57 #include <sys/systm.h> 58 #include <sys/device.h> 59 #include <sys/termios.h> 60 #include <sys/malloc.h> 61 62 #include <machine/bus.h> 63 #include <machine/intr.h> 64 65 #include <dev/ic/comreg.h> 66 #include <dev/ic/comvar.h> 67 68 #include <dev/pcmcia/pcmciavar.h> 69 #include <dev/pcmcia/pcmciareg.h> 70 #include <dev/pcmcia/pcmciadevs.h> 71 72 #include "com.h" 73 #include "pcmcom.h" 74 75 #include "locators.h" 76 77 struct pcmcom_softc { 78 struct device sc_dev; /* generic device glue */ 79 80 struct pcmcia_function *sc_pf; /* our PCMCIA function */ 81 void *sc_ih; /* interrupt handle */ 82 int sc_enabled_count; /* enabled count */ 83 84 #define NSLAVES 8 85 struct device *sc_slaves[NSLAVES]; /* slave info */ 86 int sc_nslaves; /* slave count */ 87 88 int sc_state; 89 #define PCMCOM_ATTACHED 3 90 }; 91 92 struct pcmcom_attach_args { 93 bus_space_tag_t pca_iot; /* I/O tag */ 94 bus_space_handle_t pca_ioh; /* I/O handle */ 95 int pca_slave; /* slave # */ 96 }; 97 98 int pcmcom_match __P((struct device *, struct cfdata *, void *)); 99 int pcmcom_validate_config __P((struct pcmcia_config_entry *)); 100 void pcmcom_attach __P((struct device *, struct device *, void *)); 101 int pcmcom_detach __P((struct device *, int)); 102 int pcmcom_activate __P((struct device *, enum devact)); 103 104 CFATTACH_DECL(pcmcom, sizeof(struct pcmcom_softc), 105 pcmcom_match, pcmcom_attach, pcmcom_detach, pcmcom_activate); 106 107 const struct pcmcia_product pcmcom_products[] = { 108 { PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232, 109 PCMCIA_CIS_INVALID }, 110 }; 111 const size_t pcmcom_nproducts = 112 sizeof(pcmcom_products) / sizeof(pcmcom_products[0]); 113 114 int pcmcom_print __P((void *, const char *)); 115 int pcmcom_submatch __P((struct device *, struct cfdata *, void *)); 116 117 int pcmcom_enable __P((struct pcmcom_softc *)); 118 void pcmcom_disable __P((struct pcmcom_softc *)); 119 120 int pcmcom_intr __P((void *)); 121 122 int 123 pcmcom_match(parent, cf, aux) 124 struct device *parent; 125 struct cfdata *cf; 126 void *aux; 127 { 128 struct pcmcia_attach_args *pa = aux; 129 130 if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts, 131 sizeof(pcmcom_products[0]), NULL)) 132 return (2); /* beat com_pcmcia */ 133 return (0); 134 } 135 136 int 137 pcmcom_validate_config(cfe) 138 struct pcmcia_config_entry *cfe; 139 { 140 if (cfe->iftype != PCMCIA_IFTYPE_IO || 141 cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES) 142 return (EINVAL); 143 return (0); 144 } 145 146 void 147 pcmcom_attach(parent, self, aux) 148 struct device *parent, *self; 149 void *aux; 150 { 151 struct pcmcom_softc *sc = (void *)self; 152 struct pcmcia_attach_args *pa = aux; 153 struct pcmcia_config_entry *cfe; 154 int slave; 155 int error; 156 157 sc->sc_pf = pa->pf; 158 159 error = pcmcia_function_configure(pa->pf, pcmcom_validate_config); 160 if (error) { 161 aprint_error("%s: configure failed, error=%d\n", self->dv_xname, 162 error); 163 return; 164 } 165 166 cfe = pa->pf->cfe; 167 sc->sc_nslaves = cfe->num_iospace; 168 169 error = pcmcom_enable(sc); 170 if (error) 171 goto fail; 172 173 /* Attach the children. */ 174 for (slave = 0; slave < sc->sc_nslaves; slave++) { 175 struct pcmcom_attach_args pca; 176 177 printf("%s: slave %d\n", self->dv_xname, slave); 178 179 pca.pca_iot = cfe->iospace[slave].handle.iot; 180 pca.pca_ioh = cfe->iospace[slave].handle.ioh; 181 pca.pca_slave = slave; 182 183 sc->sc_slaves[slave] = config_found_sm(&sc->sc_dev, &pca, 184 pcmcom_print, pcmcom_submatch); 185 } 186 187 pcmcom_disable(sc); 188 sc->sc_state = PCMCOM_ATTACHED; 189 return; 190 191 fail: 192 pcmcia_function_unconfigure(pa->pf); 193 } 194 195 int 196 pcmcom_detach(self, flags) 197 struct device *self; 198 int flags; 199 { 200 struct pcmcom_softc *sc = (void *)self; 201 int slave, error; 202 203 if (sc->sc_state != PCMCOM_ATTACHED) 204 return (0); 205 206 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 207 if (sc->sc_slaves[slave]) { 208 /* Detach the child. */ 209 error = config_detach(sc->sc_slaves[slave], flags); 210 if (error) 211 return (error); 212 sc->sc_slaves[slave] = 0; 213 } 214 } 215 216 pcmcia_function_unconfigure(sc->sc_pf); 217 218 return (0); 219 } 220 221 int 222 pcmcom_activate(self, act) 223 struct device *self; 224 enum devact act; 225 { 226 struct pcmcom_softc *sc = (void *)self; 227 int slave, error = 0, s; 228 229 s = splserial(); 230 switch (act) { 231 case DVACT_ACTIVATE: 232 error = EOPNOTSUPP; 233 break; 234 235 case DVACT_DEACTIVATE: 236 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 237 if (sc->sc_slaves[slave]) { 238 /* 239 * Deactivate the child. Doing so will cause 240 * our own enabled count to drop to 0, once all 241 * children are deactivated. 242 */ 243 error = config_deactivate(sc->sc_slaves[slave]); 244 if (error) 245 break; 246 } 247 } 248 break; 249 } 250 splx(s); 251 return (error); 252 } 253 254 int 255 pcmcom_print(aux, pnp) 256 void *aux; 257 const char *pnp; 258 { 259 struct pcmcom_attach_args *pca = aux; 260 261 /* only com's can attach to pcmcom's; easy... */ 262 if (pnp) 263 aprint_normal("com at %s", pnp); 264 265 aprint_normal(" slave %d", pca->pca_slave); 266 267 return (UNCONF); 268 } 269 270 int 271 pcmcom_submatch(parent, cf, aux) 272 struct device *parent; 273 struct cfdata *cf; 274 void *aux; 275 { 276 struct pcmcom_attach_args *pca = aux; 277 278 if (cf->cf_loc[PCMCOMCF_SLAVE] != pca->pca_slave && 279 cf->cf_loc[PCMCOMCF_SLAVE] != PCMCOMCF_SLAVE_DEFAULT) 280 return (0); 281 282 return (config_match(parent, cf, aux)); 283 } 284 285 int 286 pcmcom_intr(arg) 287 void *arg; 288 { 289 #if NCOM > 0 290 struct pcmcom_softc *sc = arg; 291 int i, rval = 0; 292 293 if (sc->sc_enabled_count == 0) 294 return (0); 295 296 for (i = 0; i < sc->sc_nslaves; i++) { 297 if (sc->sc_slaves[i]) 298 rval |= comintr(sc->sc_slaves[i]); 299 } 300 301 return (rval); 302 #else 303 return (0); 304 #endif /* NCOM > 0 */ 305 } 306 307 int 308 pcmcom_enable(sc) 309 struct pcmcom_softc *sc; 310 { 311 int error; 312 313 if (sc->sc_enabled_count++ != 0) 314 return (0); 315 316 /* Establish the interrupt. */ 317 sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, 318 pcmcom_intr, sc); 319 if (!sc->sc_ih) 320 return (EIO); 321 322 error = pcmcia_function_enable(sc->sc_pf); 323 if (error) { 324 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 325 sc->sc_ih = 0; 326 } 327 328 return (error); 329 } 330 331 void 332 pcmcom_disable(sc) 333 struct pcmcom_softc *sc; 334 { 335 336 if (--sc->sc_enabled_count != 0) 337 return; 338 339 pcmcia_function_disable(sc->sc_pf); 340 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 341 sc->sc_ih = 0; 342 } 343 344 /****** Here begins the com attachment code. ******/ 345 346 #if NCOM_PCMCOM > 0 347 int com_pcmcom_match __P((struct device *, struct cfdata *, void *)); 348 void com_pcmcom_attach __P((struct device *, struct device *, void *)); 349 350 /* No pcmcom-specific goo in the softc; it's all in the parent. */ 351 CFATTACH_DECL(com_pcmcom, sizeof(struct com_softc), 352 com_pcmcom_match, com_pcmcom_attach, com_detach, com_activate); 353 354 int com_pcmcom_enable __P((struct com_softc *)); 355 void com_pcmcom_disable __P((struct com_softc *)); 356 357 int 358 com_pcmcom_match(parent, cf, aux) 359 struct device *parent; 360 struct cfdata *cf; 361 void *aux; 362 { 363 364 /* Device is always present. */ 365 return (1); 366 } 367 368 void 369 com_pcmcom_attach(parent, self, aux) 370 struct device *parent, *self; 371 void *aux; 372 { 373 struct com_softc *sc = (struct com_softc *)self; 374 struct pcmcom_attach_args *pca = aux; 375 376 sc->sc_iot = pca->pca_iot; 377 sc->sc_ioh = pca->pca_ioh; 378 379 sc->enabled = 1; 380 381 sc->sc_iobase = -1; 382 sc->sc_frequency = COM_FREQ; 383 384 sc->enable = com_pcmcom_enable; 385 sc->disable = com_pcmcom_disable; 386 387 com_attach_subr(sc); 388 389 sc->enabled = 0; 390 } 391 392 int 393 com_pcmcom_enable(sc) 394 struct com_softc *sc; 395 { 396 397 return (pcmcom_enable((struct pcmcom_softc *)sc->sc_dev.dv_parent)); 398 } 399 400 void 401 com_pcmcom_disable(sc) 402 struct com_softc *sc; 403 { 404 405 pcmcom_disable((struct pcmcom_softc *)sc->sc_dev.dv_parent); 406 } 407 #endif /* NCOM_PCMCOM > 0 */ 408
Indexes created Thu Sep 25 16:09:42 GMT 2025