1 /* $NetBSD: pcmcom.c,v 1.28 2006/10/12 01:31:50 christos 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 1.28 2006/10/12 01:31:50 christos 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 *); 115 116 int pcmcom_enable(struct pcmcom_softc *); 117 void pcmcom_disable(struct pcmcom_softc *); 118 119 int pcmcom_intr(void *); 120 121 int 122 pcmcom_match(struct device *parent __unused, struct cfdata *cf __unused, 123 void *aux) 124 { 125 struct pcmcia_attach_args *pa = aux; 126 127 if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts, 128 sizeof(pcmcom_products[0]), NULL)) 129 return (2); /* beat com_pcmcia */ 130 return (0); 131 } 132 133 int 134 pcmcom_validate_config(cfe) 135 struct pcmcia_config_entry *cfe; 136 { 137 if (cfe->iftype != PCMCIA_IFTYPE_IO || 138 cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES) 139 return (EINVAL); 140 return (0); 141 } 142 143 void 144 pcmcom_attach(struct device *parent __unused, struct device *self, void *aux) 145 { 146 struct pcmcom_softc *sc = (void *)self; 147 struct pcmcia_attach_args *pa = aux; 148 struct pcmcia_config_entry *cfe; 149 int slave; 150 int error; 151 int locs[PCMCOMCF_NLOCS]; 152 153 sc->sc_pf = pa->pf; 154 155 error = pcmcia_function_configure(pa->pf, pcmcom_validate_config); 156 if (error) { 157 aprint_error("%s: configure failed, error=%d\n", self->dv_xname, 158 error); 159 return; 160 } 161 162 cfe = pa->pf->cfe; 163 sc->sc_nslaves = cfe->num_iospace; 164 165 error = pcmcom_enable(sc); 166 if (error) 167 goto fail; 168 169 /* Attach the children. */ 170 for (slave = 0; slave < sc->sc_nslaves; slave++) { 171 struct pcmcom_attach_args pca; 172 173 printf("%s: slave %d\n", self->dv_xname, slave); 174 175 pca.pca_iot = cfe->iospace[slave].handle.iot; 176 pca.pca_ioh = cfe->iospace[slave].handle.ioh; 177 pca.pca_slave = slave; 178 179 locs[PCMCOMCF_SLAVE] = slave; 180 181 sc->sc_slaves[slave] = config_found_sm_loc(&sc->sc_dev, 182 "pcmcom", locs, 183 &pca, pcmcom_print, config_stdsubmatch); 184 } 185 186 pcmcom_disable(sc); 187 sc->sc_state = PCMCOM_ATTACHED; 188 return; 189 190 fail: 191 pcmcia_function_unconfigure(pa->pf); 192 } 193 194 int 195 pcmcom_detach(self, flags) 196 struct device *self; 197 int flags; 198 { 199 struct pcmcom_softc *sc = (void *)self; 200 int slave, error; 201 202 if (sc->sc_state != PCMCOM_ATTACHED) 203 return (0); 204 205 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 206 if (sc->sc_slaves[slave]) { 207 /* Detach the child. */ 208 error = config_detach(sc->sc_slaves[slave], flags); 209 if (error) 210 return (error); 211 sc->sc_slaves[slave] = 0; 212 } 213 } 214 215 pcmcia_function_unconfigure(sc->sc_pf); 216 217 return (0); 218 } 219 220 int 221 pcmcom_activate(self, act) 222 struct device *self; 223 enum devact act; 224 { 225 struct pcmcom_softc *sc = (void *)self; 226 int slave, error = 0, s; 227 228 s = splserial(); 229 switch (act) { 230 case DVACT_ACTIVATE: 231 error = EOPNOTSUPP; 232 break; 233 234 case DVACT_DEACTIVATE: 235 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 236 if (sc->sc_slaves[slave]) { 237 /* 238 * Deactivate the child. Doing so will cause 239 * our own enabled count to drop to 0, once all 240 * children are deactivated. 241 */ 242 error = config_deactivate(sc->sc_slaves[slave]); 243 if (error) 244 break; 245 } 246 } 247 break; 248 } 249 splx(s); 250 return (error); 251 } 252 253 int 254 pcmcom_print(aux, pnp) 255 void *aux; 256 const char *pnp; 257 { 258 struct pcmcom_attach_args *pca = aux; 259 260 /* only com's can attach to pcmcom's; easy... */ 261 if (pnp) 262 aprint_normal("com at %s", pnp); 263 264 aprint_normal(" slave %d", pca->pca_slave); 265 266 return (UNCONF); 267 } 268 269 int 270 pcmcom_intr(arg) 271 void *arg; 272 { 273 #if NCOM > 0 274 struct pcmcom_softc *sc = arg; 275 int i, rval = 0; 276 277 if (sc->sc_enabled_count == 0) 278 return (0); 279 280 for (i = 0; i < sc->sc_nslaves; i++) { 281 if (sc->sc_slaves[i]) 282 rval |= comintr(sc->sc_slaves[i]); 283 } 284 285 return (rval); 286 #else 287 return (0); 288 #endif /* NCOM > 0 */ 289 } 290 291 int 292 pcmcom_enable(sc) 293 struct pcmcom_softc *sc; 294 { 295 int error; 296 297 if (sc->sc_enabled_count++ != 0) 298 return (0); 299 300 /* Establish the interrupt. */ 301 sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, 302 pcmcom_intr, sc); 303 if (!sc->sc_ih) 304 return (EIO); 305 306 error = pcmcia_function_enable(sc->sc_pf); 307 if (error) { 308 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 309 sc->sc_ih = 0; 310 } 311 312 return (error); 313 } 314 315 void 316 pcmcom_disable(sc) 317 struct pcmcom_softc *sc; 318 { 319 320 if (--sc->sc_enabled_count != 0) 321 return; 322 323 pcmcia_function_disable(sc->sc_pf); 324 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 325 sc->sc_ih = 0; 326 } 327 328 /****** Here begins the com attachment code. ******/ 329 330 #if NCOM_PCMCOM > 0 331 int com_pcmcom_match(struct device *, struct cfdata *, void *); 332 void com_pcmcom_attach(struct device *, struct device *, void *); 333 334 /* No pcmcom-specific goo in the softc; it's all in the parent. */ 335 CFATTACH_DECL(com_pcmcom, sizeof(struct com_softc), 336 com_pcmcom_match, com_pcmcom_attach, com_detach, com_activate); 337 338 int com_pcmcom_enable(struct com_softc *); 339 void com_pcmcom_disable(struct com_softc *); 340 341 int 342 com_pcmcom_match(struct device *parent __unused, struct cfdata *cf __unused, 343 void *aux __unused) 344 { 345 346 /* Device is always present. */ 347 return (1); 348 } 349 350 void 351 com_pcmcom_attach(struct device *parent __unused, struct device *self, 352 void *aux) 353 { 354 struct com_softc *sc = (struct com_softc *)self; 355 struct pcmcom_attach_args *pca = aux; 356 357 COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1); 358 sc->enabled = 1; 359 360 sc->sc_frequency = COM_FREQ; 361 362 sc->enable = com_pcmcom_enable; 363 sc->disable = com_pcmcom_disable; 364 365 com_attach_subr(sc); 366 367 sc->enabled = 0; 368 } 369 370 int 371 com_pcmcom_enable(sc) 372 struct com_softc *sc; 373 { 374 375 return (pcmcom_enable((struct pcmcom_softc *)device_parent(&sc->sc_dev))); 376 } 377 378 void 379 com_pcmcom_disable(sc) 380 struct com_softc *sc; 381 { 382 383 pcmcom_disable((struct pcmcom_softc *)device_parent(&sc->sc_dev)); 384 } 385 #endif /* NCOM_PCMCOM > 0 */ 386