1 /* $NetBSD: pcmcom.c,v 1.31 2007/10/19 12:01:06 ad 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 1.31 2007/10/19 12:01:06 ad 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 <sys/bus.h> 63 #include <sys/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 #if 0 /* does not work */ 111 { PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232_A, 112 PCMCIA_CIS_INVALID }, 113 #endif 114 }; 115 const size_t pcmcom_nproducts = 116 sizeof(pcmcom_products) / sizeof(pcmcom_products[0]); 117 118 int pcmcom_print(void *, const char *); 119 120 int pcmcom_enable(struct pcmcom_softc *); 121 void pcmcom_disable(struct pcmcom_softc *); 122 123 int pcmcom_intr(void *); 124 125 int 126 pcmcom_match(struct device *parent, 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(struct device *parent, struct device *self, void *aux) 149 { 150 struct pcmcom_softc *sc = (void *)self; 151 struct pcmcia_attach_args *pa = aux; 152 struct pcmcia_config_entry *cfe; 153 int slave; 154 int error; 155 int locs[PCMCOMCF_NLOCS]; 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 locs[PCMCOMCF_SLAVE] = slave; 184 185 sc->sc_slaves[slave] = config_found_sm_loc(&sc->sc_dev, 186 "pcmcom", locs, 187 &pca, pcmcom_print, config_stdsubmatch); 188 } 189 190 pcmcom_disable(sc); 191 sc->sc_state = PCMCOM_ATTACHED; 192 return; 193 194 fail: 195 pcmcia_function_unconfigure(pa->pf); 196 } 197 198 int 199 pcmcom_detach(self, flags) 200 struct device *self; 201 int flags; 202 { 203 struct pcmcom_softc *sc = (void *)self; 204 int slave, error; 205 206 if (sc->sc_state != PCMCOM_ATTACHED) 207 return (0); 208 209 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 210 if (sc->sc_slaves[slave]) { 211 /* Detach the child. */ 212 error = config_detach(sc->sc_slaves[slave], flags); 213 if (error) 214 return (error); 215 sc->sc_slaves[slave] = 0; 216 } 217 } 218 219 pcmcia_function_unconfigure(sc->sc_pf); 220 221 return (0); 222 } 223 224 int 225 pcmcom_activate(self, act) 226 struct device *self; 227 enum devact act; 228 { 229 struct pcmcom_softc *sc = (void *)self; 230 int slave, error = 0, s; 231 232 s = splserial(); 233 switch (act) { 234 case DVACT_ACTIVATE: 235 error = EOPNOTSUPP; 236 break; 237 238 case DVACT_DEACTIVATE: 239 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 240 if (sc->sc_slaves[slave]) { 241 /* 242 * Deactivate the child. Doing so will cause 243 * our own enabled count to drop to 0, once all 244 * children are deactivated. 245 */ 246 error = config_deactivate(sc->sc_slaves[slave]); 247 if (error) 248 break; 249 } 250 } 251 break; 252 } 253 splx(s); 254 return (error); 255 } 256 257 int 258 pcmcom_print(aux, pnp) 259 void *aux; 260 const char *pnp; 261 { 262 struct pcmcom_attach_args *pca = aux; 263 264 /* only com's can attach to pcmcom's; easy... */ 265 if (pnp) 266 aprint_normal("com at %s", pnp); 267 268 aprint_normal(" slave %d", pca->pca_slave); 269 270 return (UNCONF); 271 } 272 273 int 274 pcmcom_intr(arg) 275 void *arg; 276 { 277 #if NCOM > 0 278 struct pcmcom_softc *sc = arg; 279 int i, rval = 0; 280 281 if (sc->sc_enabled_count == 0) 282 return (0); 283 284 for (i = 0; i < sc->sc_nslaves; i++) { 285 if (sc->sc_slaves[i]) 286 rval |= comintr(sc->sc_slaves[i]); 287 } 288 289 return (rval); 290 #else 291 return (0); 292 #endif /* NCOM > 0 */ 293 } 294 295 int 296 pcmcom_enable(sc) 297 struct pcmcom_softc *sc; 298 { 299 int error; 300 301 if (sc->sc_enabled_count++ != 0) 302 return (0); 303 304 /* Establish the interrupt. */ 305 sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, 306 pcmcom_intr, sc); 307 if (!sc->sc_ih) 308 return (EIO); 309 310 error = pcmcia_function_enable(sc->sc_pf); 311 if (error) { 312 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 313 sc->sc_ih = 0; 314 } 315 316 return (error); 317 } 318 319 void 320 pcmcom_disable(sc) 321 struct pcmcom_softc *sc; 322 { 323 324 if (--sc->sc_enabled_count != 0) 325 return; 326 327 pcmcia_function_disable(sc->sc_pf); 328 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 329 sc->sc_ih = 0; 330 } 331 332 /****** Here begins the com attachment code. ******/ 333 334 #if NCOM_PCMCOM > 0 335 int com_pcmcom_match(struct device *, struct cfdata *, void *); 336 void com_pcmcom_attach(struct device *, struct device *, void *); 337 338 /* No pcmcom-specific goo in the softc; it's all in the parent. */ 339 CFATTACH_DECL(com_pcmcom, sizeof(struct com_softc), 340 com_pcmcom_match, com_pcmcom_attach, com_detach, com_activate); 341 342 int com_pcmcom_enable(struct com_softc *); 343 void com_pcmcom_disable(struct com_softc *); 344 345 int 346 com_pcmcom_match(struct device *parent, struct cfdata *cf, 347 void *aux) 348 { 349 350 /* Device is always present. */ 351 return (1); 352 } 353 354 void 355 com_pcmcom_attach(struct device *parent, struct device *self, 356 void *aux) 357 { 358 struct com_softc *sc = (struct com_softc *)self; 359 struct pcmcom_attach_args *pca = aux; 360 361 COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1); 362 sc->enabled = 1; 363 364 sc->sc_frequency = COM_FREQ; 365 366 sc->enable = com_pcmcom_enable; 367 sc->disable = com_pcmcom_disable; 368 369 com_attach_subr(sc); 370 371 sc->enabled = 0; 372 } 373 374 int 375 com_pcmcom_enable(sc) 376 struct com_softc *sc; 377 { 378 379 return (pcmcom_enable((struct pcmcom_softc *)device_parent(&sc->sc_dev))); 380 } 381 382 void 383 com_pcmcom_disable(sc) 384 struct com_softc *sc; 385 { 386 387 pcmcom_disable((struct pcmcom_softc *)device_parent(&sc->sc_dev)); 388 } 389 #endif /* NCOM_PCMCOM > 0 */ 390