pcmcom.c revision 1.23
1 /* $NetBSD: pcmcom.c,v 1.23 2005/08/25 18:35:39 drochner 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 1.23 2005/08/25 18:35:39 drochner 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(struct device *, struct cfdata *, void *); 99 int pcmcom_validate_config(struct pcmcia_config_entry *); 100 void pcmcom_attach(struct device *, struct device *, void *); 101 int pcmcom_detach(struct device *, int); 102 int pcmcom_activate(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(void *, const char *); 115 int pcmcom_submatch(struct device *, struct cfdata *, 116 const locdesc_t *, void *); 117 118 int pcmcom_enable(struct pcmcom_softc *); 119 void pcmcom_disable(struct pcmcom_softc *); 120 121 int pcmcom_intr(void *); 122 123 int 124 pcmcom_match(parent, cf, aux) 125 struct device *parent; 126 struct cfdata *cf; 127 void *aux; 128 { 129 struct pcmcia_attach_args *pa = aux; 130 131 if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts, 132 sizeof(pcmcom_products[0]), NULL)) 133 return (2); /* beat com_pcmcia */ 134 return (0); 135 } 136 137 int 138 pcmcom_validate_config(cfe) 139 struct pcmcia_config_entry *cfe; 140 { 141 if (cfe->iftype != PCMCIA_IFTYPE_IO || 142 cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES) 143 return (EINVAL); 144 return (0); 145 } 146 147 void 148 pcmcom_attach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct pcmcom_softc *sc = (void *)self; 153 struct pcmcia_attach_args *pa = aux; 154 struct pcmcia_config_entry *cfe; 155 int slave; 156 int error; 157 int locs[PCMCOMCF_NLOCS]; 158 159 sc->sc_pf = pa->pf; 160 161 error = pcmcia_function_configure(pa->pf, pcmcom_validate_config); 162 if (error) { 163 aprint_error("%s: configure failed, error=%d\n", self->dv_xname, 164 error); 165 return; 166 } 167 168 cfe = pa->pf->cfe; 169 sc->sc_nslaves = cfe->num_iospace; 170 171 error = pcmcom_enable(sc); 172 if (error) 173 goto fail; 174 175 /* Attach the children. */ 176 for (slave = 0; slave < sc->sc_nslaves; slave++) { 177 struct pcmcom_attach_args pca; 178 179 printf("%s: slave %d\n", self->dv_xname, slave); 180 181 pca.pca_iot = cfe->iospace[slave].handle.iot; 182 pca.pca_ioh = cfe->iospace[slave].handle.ioh; 183 pca.pca_slave = slave; 184 185 locs[PCMCOMCF_SLAVE] = slave; 186 187 sc->sc_slaves[slave] = config_found_sm_loc(&sc->sc_dev, 188 "pcmcom", locs, 189 &pca, pcmcom_print, pcmcom_submatch); 190 } 191 192 pcmcom_disable(sc); 193 sc->sc_state = PCMCOM_ATTACHED; 194 return; 195 196 fail: 197 pcmcia_function_unconfigure(pa->pf); 198 } 199 200 int 201 pcmcom_detach(self, flags) 202 struct device *self; 203 int flags; 204 { 205 struct pcmcom_softc *sc = (void *)self; 206 int slave, error; 207 208 if (sc->sc_state != PCMCOM_ATTACHED) 209 return (0); 210 211 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 212 if (sc->sc_slaves[slave]) { 213 /* Detach the child. */ 214 error = config_detach(sc->sc_slaves[slave], flags); 215 if (error) 216 return (error); 217 sc->sc_slaves[slave] = 0; 218 } 219 } 220 221 pcmcia_function_unconfigure(sc->sc_pf); 222 223 return (0); 224 } 225 226 int 227 pcmcom_activate(self, act) 228 struct device *self; 229 enum devact act; 230 { 231 struct pcmcom_softc *sc = (void *)self; 232 int slave, error = 0, s; 233 234 s = splserial(); 235 switch (act) { 236 case DVACT_ACTIVATE: 237 error = EOPNOTSUPP; 238 break; 239 240 case DVACT_DEACTIVATE: 241 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 242 if (sc->sc_slaves[slave]) { 243 /* 244 * Deactivate the child. Doing so will cause 245 * our own enabled count to drop to 0, once all 246 * children are deactivated. 247 */ 248 error = config_deactivate(sc->sc_slaves[slave]); 249 if (error) 250 break; 251 } 252 } 253 break; 254 } 255 splx(s); 256 return (error); 257 } 258 259 int 260 pcmcom_print(aux, pnp) 261 void *aux; 262 const char *pnp; 263 { 264 struct pcmcom_attach_args *pca = aux; 265 266 /* only com's can attach to pcmcom's; easy... */ 267 if (pnp) 268 aprint_normal("com at %s", pnp); 269 270 aprint_normal(" slave %d", pca->pca_slave); 271 272 return (UNCONF); 273 } 274 275 int 276 pcmcom_submatch(parent, cf, locs, aux) 277 struct device *parent; 278 struct cfdata *cf; 279 const locdesc_t *locs; 280 void *aux; 281 { 282 283 if (cf->cf_loc[PCMCOMCF_SLAVE] != PCMCOMCF_SLAVE_DEFAULT && 284 cf->cf_loc[PCMCOMCF_SLAVE] != locs[PCMCOMCF_SLAVE]); 285 return (0); 286 287 return (config_match(parent, cf, aux)); 288 } 289 290 int 291 pcmcom_intr(arg) 292 void *arg; 293 { 294 #if NCOM > 0 295 struct pcmcom_softc *sc = arg; 296 int i, rval = 0; 297 298 if (sc->sc_enabled_count == 0) 299 return (0); 300 301 for (i = 0; i < sc->sc_nslaves; i++) { 302 if (sc->sc_slaves[i]) 303 rval |= comintr(sc->sc_slaves[i]); 304 } 305 306 return (rval); 307 #else 308 return (0); 309 #endif /* NCOM > 0 */ 310 } 311 312 int 313 pcmcom_enable(sc) 314 struct pcmcom_softc *sc; 315 { 316 int error; 317 318 if (sc->sc_enabled_count++ != 0) 319 return (0); 320 321 /* Establish the interrupt. */ 322 sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, 323 pcmcom_intr, sc); 324 if (!sc->sc_ih) 325 return (EIO); 326 327 error = pcmcia_function_enable(sc->sc_pf); 328 if (error) { 329 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 330 sc->sc_ih = 0; 331 } 332 333 return (error); 334 } 335 336 void 337 pcmcom_disable(sc) 338 struct pcmcom_softc *sc; 339 { 340 341 if (--sc->sc_enabled_count != 0) 342 return; 343 344 pcmcia_function_disable(sc->sc_pf); 345 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 346 sc->sc_ih = 0; 347 } 348 349 /****** Here begins the com attachment code. ******/ 350 351 #if NCOM_PCMCOM > 0 352 int com_pcmcom_match(struct device *, struct cfdata *, void *); 353 void com_pcmcom_attach(struct device *, struct device *, void *); 354 355 /* No pcmcom-specific goo in the softc; it's all in the parent. */ 356 CFATTACH_DECL(com_pcmcom, sizeof(struct com_softc), 357 com_pcmcom_match, com_pcmcom_attach, com_detach, com_activate); 358 359 int com_pcmcom_enable(struct com_softc *); 360 void com_pcmcom_disable(struct com_softc *); 361 362 int 363 com_pcmcom_match(parent, cf, aux) 364 struct device *parent; 365 struct cfdata *cf; 366 void *aux; 367 { 368 369 /* Device is always present. */ 370 return (1); 371 } 372 373 void 374 com_pcmcom_attach(parent, self, aux) 375 struct device *parent, *self; 376 void *aux; 377 { 378 struct com_softc *sc = (struct com_softc *)self; 379 struct pcmcom_attach_args *pca = aux; 380 381 sc->sc_iot = pca->pca_iot; 382 sc->sc_ioh = pca->pca_ioh; 383 384 sc->enabled = 1; 385 386 sc->sc_iobase = -1; 387 sc->sc_frequency = COM_FREQ; 388 389 sc->enable = com_pcmcom_enable; 390 sc->disable = com_pcmcom_disable; 391 392 com_attach_subr(sc); 393 394 sc->enabled = 0; 395 } 396 397 int 398 com_pcmcom_enable(sc) 399 struct com_softc *sc; 400 { 401 402 return (pcmcom_enable((struct pcmcom_softc *)sc->sc_dev.dv_parent)); 403 } 404 405 void 406 com_pcmcom_disable(sc) 407 struct com_softc *sc; 408 { 409 410 pcmcom_disable((struct pcmcom_softc *)sc->sc_dev.dv_parent); 411 } 412 #endif /* NCOM_PCMCOM > 0 */ 413
Indexes created Thu Sep 25 06:09:39 GMT 2025