pcmcom.c revision 1.35
1 /* $NetBSD: pcmcom.c,v 1.35 2009/03/14 15:36:20 dsl 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Device driver for multi-port PCMCIA serial cards, written by 34 * Jason R. Thorpe for RedBack Networks, Inc. 35 * 36 * Most of these cards are simply multiple UARTs sharing a single interrupt 37 * line, and rely on the fact that PCMCIA level-triggered interrupts can 38 * be shared. There are no special interrupt registers on them, as there 39 * are on most ISA multi-port serial cards. 40 * 41 * If there are other cards that have interrupt registers, they should not 42 * be glued into this driver. Rather, separate drivers should be written 43 * for those devices, as we have in the ISA multi-port serial card case. 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: pcmcom.c,v 1.35 2009/03/14 15:36:20 dsl Exp $"); 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/device.h> 52 #include <sys/termios.h> 53 #include <sys/malloc.h> 54 55 #include <sys/bus.h> 56 #include <sys/intr.h> 57 58 #include <dev/ic/comreg.h> 59 #include <dev/ic/comvar.h> 60 61 #include <dev/pcmcia/pcmciavar.h> 62 #include <dev/pcmcia/pcmciareg.h> 63 #include <dev/pcmcia/pcmciadevs.h> 64 65 #include "com.h" 66 #include "pcmcom.h" 67 68 #include "locators.h" 69 70 struct pcmcom_softc { 71 struct device sc_dev; /* generic device glue */ 72 73 struct pcmcia_function *sc_pf; /* our PCMCIA function */ 74 void *sc_ih; /* interrupt handle */ 75 int sc_enabled_count; /* enabled count */ 76 77 #define NSLAVES 8 78 struct device *sc_slaves[NSLAVES]; /* slave info */ 79 int sc_nslaves; /* slave count */ 80 81 int sc_state; 82 #define PCMCOM_ATTACHED 3 83 }; 84 85 struct pcmcom_attach_args { 86 bus_space_tag_t pca_iot; /* I/O tag */ 87 bus_space_handle_t pca_ioh; /* I/O handle */ 88 int pca_slave; /* slave # */ 89 }; 90 91 int pcmcom_match(struct device *, struct cfdata *, void *); 92 int pcmcom_validate_config(struct pcmcia_config_entry *); 93 void pcmcom_attach(struct device *, struct device *, void *); 94 int pcmcom_detach(struct device *, int); 95 int pcmcom_activate(struct device *, enum devact); 96 97 CFATTACH_DECL(pcmcom, sizeof(struct pcmcom_softc), 98 pcmcom_match, pcmcom_attach, pcmcom_detach, pcmcom_activate); 99 100 const struct pcmcia_product pcmcom_products[] = { 101 { PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232, 102 PCMCIA_CIS_INVALID }, 103 #if 0 /* does not work */ 104 { PCMCIA_VENDOR_SOCKET, PCMCIA_PRODUCT_SOCKET_DUAL_RS232_A, 105 PCMCIA_CIS_INVALID }, 106 #endif 107 }; 108 const size_t pcmcom_nproducts = 109 sizeof(pcmcom_products) / sizeof(pcmcom_products[0]); 110 111 int pcmcom_print(void *, const char *); 112 113 int pcmcom_enable(struct pcmcom_softc *); 114 void pcmcom_disable(struct pcmcom_softc *); 115 116 int pcmcom_intr(void *); 117 118 int 119 pcmcom_match(struct device *parent, struct cfdata *cf, 120 void *aux) 121 { 122 struct pcmcia_attach_args *pa = aux; 123 124 if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts, 125 sizeof(pcmcom_products[0]), NULL)) 126 return (2); /* beat com_pcmcia */ 127 return (0); 128 } 129 130 int 131 pcmcom_validate_config(struct pcmcia_config_entry *cfe) 132 { 133 if (cfe->iftype != PCMCIA_IFTYPE_IO || 134 cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES) 135 return (EINVAL); 136 return (0); 137 } 138 139 void 140 pcmcom_attach(struct device *parent, struct device *self, void *aux) 141 { 142 struct pcmcom_softc *sc = (void *)self; 143 struct pcmcia_attach_args *pa = aux; 144 struct pcmcia_config_entry *cfe; 145 int slave; 146 int error; 147 int locs[PCMCOMCF_NLOCS]; 148 149 sc->sc_pf = pa->pf; 150 151 error = pcmcia_function_configure(pa->pf, pcmcom_validate_config); 152 if (error) { 153 aprint_error_dev(self, "configure failed, error=%d\n", 154 error); 155 return; 156 } 157 158 cfe = pa->pf->cfe; 159 sc->sc_nslaves = cfe->num_iospace; 160 161 error = pcmcom_enable(sc); 162 if (error) 163 goto fail; 164 165 /* Attach the children. */ 166 for (slave = 0; slave < sc->sc_nslaves; slave++) { 167 struct pcmcom_attach_args pca; 168 169 printf("%s: slave %d\n", device_xname(self), slave); 170 171 pca.pca_iot = cfe->iospace[slave].handle.iot; 172 pca.pca_ioh = cfe->iospace[slave].handle.ioh; 173 pca.pca_slave = slave; 174 175 locs[PCMCOMCF_SLAVE] = slave; 176 177 sc->sc_slaves[slave] = config_found_sm_loc(&sc->sc_dev, 178 "pcmcom", locs, 179 &pca, pcmcom_print, config_stdsubmatch); 180 } 181 182 pcmcom_disable(sc); 183 sc->sc_state = PCMCOM_ATTACHED; 184 return; 185 186 fail: 187 pcmcia_function_unconfigure(pa->pf); 188 } 189 190 int 191 pcmcom_detach(struct device *self, int flags) 192 { 193 struct pcmcom_softc *sc = (void *)self; 194 int slave, error; 195 196 if (sc->sc_state != PCMCOM_ATTACHED) 197 return (0); 198 199 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 200 if (sc->sc_slaves[slave]) { 201 /* Detach the child. */ 202 error = config_detach(sc->sc_slaves[slave], flags); 203 if (error) 204 return (error); 205 sc->sc_slaves[slave] = 0; 206 } 207 } 208 209 pcmcia_function_unconfigure(sc->sc_pf); 210 211 return (0); 212 } 213 214 int 215 pcmcom_activate(struct device *self, enum devact act) 216 { 217 struct pcmcom_softc *sc = (void *)self; 218 int slave, error = 0, s; 219 220 s = splserial(); 221 switch (act) { 222 case DVACT_ACTIVATE: 223 error = EOPNOTSUPP; 224 break; 225 226 case DVACT_DEACTIVATE: 227 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 228 if (sc->sc_slaves[slave]) { 229 /* 230 * Deactivate the child. Doing so will cause 231 * our own enabled count to drop to 0, once all 232 * children are deactivated. 233 */ 234 error = config_deactivate(sc->sc_slaves[slave]); 235 if (error) 236 break; 237 } 238 } 239 break; 240 } 241 splx(s); 242 return (error); 243 } 244 245 int 246 pcmcom_print(void *aux, const char *pnp) 247 { 248 struct pcmcom_attach_args *pca = aux; 249 250 /* only com's can attach to pcmcom's; easy... */ 251 if (pnp) 252 aprint_normal("com at %s", pnp); 253 254 aprint_normal(" slave %d", pca->pca_slave); 255 256 return (UNCONF); 257 } 258 259 int 260 pcmcom_intr(void *arg) 261 { 262 #if NCOM > 0 263 struct pcmcom_softc *sc = arg; 264 int i, rval = 0; 265 266 if (sc->sc_enabled_count == 0) 267 return (0); 268 269 for (i = 0; i < sc->sc_nslaves; i++) { 270 if (sc->sc_slaves[i]) 271 rval |= comintr(sc->sc_slaves[i]); 272 } 273 274 return (rval); 275 #else 276 return (0); 277 #endif /* NCOM > 0 */ 278 } 279 280 int 281 pcmcom_enable(struct pcmcom_softc *sc) 282 { 283 int error; 284 285 if (sc->sc_enabled_count++ != 0) 286 return (0); 287 288 /* Establish the interrupt. */ 289 sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, 290 pcmcom_intr, sc); 291 if (!sc->sc_ih) 292 return (EIO); 293 294 error = pcmcia_function_enable(sc->sc_pf); 295 if (error) { 296 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 297 sc->sc_ih = 0; 298 } 299 300 return (error); 301 } 302 303 void 304 pcmcom_disable(struct pcmcom_softc *sc) 305 { 306 307 if (--sc->sc_enabled_count != 0) 308 return; 309 310 pcmcia_function_disable(sc->sc_pf); 311 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 312 sc->sc_ih = 0; 313 } 314 315 /****** Here begins the com attachment code. ******/ 316 317 #if NCOM_PCMCOM > 0 318 int com_pcmcom_match(device_t, cfdata_t , void *); 319 void com_pcmcom_attach(device_t, device_t, void *); 320 321 /* No pcmcom-specific goo in the softc; it's all in the parent. */ 322 CFATTACH_DECL(com_pcmcom, sizeof(struct com_softc), 323 com_pcmcom_match, com_pcmcom_attach, com_detach, com_activate); 324 325 int com_pcmcom_enable(struct com_softc *); 326 void com_pcmcom_disable(struct com_softc *); 327 328 int 329 com_pcmcom_match(device_t parent, cfdata_t cf, void *aux) 330 { 331 332 /* Device is always present. */ 333 return (1); 334 } 335 336 void 337 com_pcmcom_attach(device_t parent, device_t self, void *aux) 338 { 339 struct com_softc *sc = device_private(self); 340 struct pcmcom_attach_args *pca = aux; 341 342 sc->sc_dev = self; 343 COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1); 344 sc->enabled = 1; 345 346 sc->sc_frequency = COM_FREQ; 347 348 sc->enable = com_pcmcom_enable; 349 sc->disable = com_pcmcom_disable; 350 351 com_attach_subr(sc); 352 353 sc->enabled = 0; 354 } 355 356 int 357 com_pcmcom_enable(struct com_softc *sc) 358 { 359 360 return (pcmcom_enable(device_private(device_parent(sc->sc_dev)))); 361 } 362 363 void 364 com_pcmcom_disable(struct com_softc *sc) 365 { 366 367 pcmcom_disable(device_private(device_parent(sc->sc_dev))); 368 } 369 #endif /* NCOM_PCMCOM > 0 */ 370
Indexes created Thu Sep 25 02:09:54 GMT 2025