pcmcom.c revision 1.42
1 /* $NetBSD: pcmcom.c,v 1.42 2021/04/24 23:36:58 thorpej 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 1.42 2021/04/24 23:36:58 thorpej 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 device_t 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 device_t 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(device_t, cfdata_t, void *); 92 int pcmcom_validate_config(struct pcmcia_config_entry *); 93 void pcmcom_attach(device_t, device_t, void *); 94 int pcmcom_detach(device_t, int); 95 void pcmcom_childdet(device_t, device_t); 96 97 CFATTACH_DECL_NEW(pcmcom, sizeof(struct pcmcom_softc), 98 pcmcom_match, pcmcom_attach, pcmcom_detach, NULL); 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 = __arraycount(pcmcom_products); 109 110 int pcmcom_print(void *, const char *); 111 112 int pcmcom_enable(struct pcmcom_softc *); 113 void pcmcom_disable(struct pcmcom_softc *); 114 115 int pcmcom_intr(void *); 116 117 int 118 pcmcom_match(device_t parent, cfdata_t cf, void *aux) 119 { 120 struct pcmcia_attach_args *pa = aux; 121 122 if (pcmcia_product_lookup(pa, pcmcom_products, pcmcom_nproducts, 123 sizeof(pcmcom_products[0]), NULL)) 124 return (2); /* beat com_pcmcia */ 125 return (0); 126 } 127 128 int 129 pcmcom_validate_config(struct pcmcia_config_entry *cfe) 130 { 131 if (cfe->iftype != PCMCIA_IFTYPE_IO || 132 cfe->num_iospace < 1 || cfe->num_iospace > NSLAVES) 133 return (EINVAL); 134 return (0); 135 } 136 137 void 138 pcmcom_attach(device_t parent, device_t self, void *aux) 139 { 140 struct pcmcom_softc *sc = device_private(self); 141 struct pcmcia_attach_args *pa = aux; 142 struct pcmcia_config_entry *cfe; 143 int slave; 144 int error; 145 int locs[PCMCOMCF_NLOCS]; 146 147 sc->sc_dev = self; 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", error); 154 return; 155 } 156 157 cfe = pa->pf->cfe; 158 sc->sc_nslaves = cfe->num_iospace; 159 160 error = pcmcom_enable(sc); 161 if (error) 162 goto fail; 163 164 /* Attach the children. */ 165 for (slave = 0; slave < sc->sc_nslaves; slave++) { 166 struct pcmcom_attach_args pca; 167 168 printf("%s: slave %d\n", device_xname(self), slave); 169 170 pca.pca_iot = cfe->iospace[slave].handle.iot; 171 pca.pca_ioh = cfe->iospace[slave].handle.ioh; 172 pca.pca_slave = slave; 173 174 locs[PCMCOMCF_SLAVE] = slave; 175 176 sc->sc_slaves[slave] = 177 config_found(sc->sc_dev, &pca, pcmcom_print, 178 CFARG_SUBMATCH, config_stdsubmatch, 179 CFARG_LOCATORS, locs, 180 CFARG_EOL); 181 } 182 183 pcmcom_disable(sc); 184 sc->sc_state = PCMCOM_ATTACHED; 185 return; 186 187 fail: 188 pcmcia_function_unconfigure(pa->pf); 189 } 190 191 void 192 pcmcom_childdet(device_t self, device_t child) 193 { 194 struct pcmcom_softc *sc = device_private(self); 195 int slave; 196 197 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 198 if (sc->sc_slaves[slave] == child) 199 sc->sc_slaves[slave] = NULL; 200 } 201 } 202 203 int 204 pcmcom_detach(device_t self, int flags) 205 { 206 struct pcmcom_softc *sc = device_private(self); 207 int slave, error; 208 209 if (sc->sc_state != PCMCOM_ATTACHED) 210 return (0); 211 212 for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { 213 if (sc->sc_slaves[slave]) { 214 /* Detach the child. */ 215 error = config_detach(sc->sc_slaves[slave], flags); 216 if (error) 217 return (error); 218 } 219 } 220 221 pcmcia_function_unconfigure(sc->sc_pf); 222 223 return (0); 224 } 225 226 int 227 pcmcom_print(void *aux, const char *pnp) 228 { 229 struct pcmcom_attach_args *pca = aux; 230 231 /* only com's can attach to pcmcom's; easy... */ 232 if (pnp) 233 aprint_normal("com at %s", pnp); 234 235 aprint_normal(" slave %d", pca->pca_slave); 236 237 return (UNCONF); 238 } 239 240 int 241 pcmcom_intr(void *arg) 242 { 243 #if NCOM > 0 244 struct pcmcom_softc *sc = arg; 245 int i, rval = 0; 246 247 if (sc->sc_enabled_count == 0) 248 return (0); 249 250 for (i = 0; i < sc->sc_nslaves; i++) { 251 if (sc->sc_slaves[i]) 252 rval |= comintr(sc->sc_slaves[i]); 253 } 254 255 return (rval); 256 #else 257 return (0); 258 #endif /* NCOM > 0 */ 259 } 260 261 int 262 pcmcom_enable(struct pcmcom_softc *sc) 263 { 264 int error; 265 266 if (sc->sc_enabled_count++ != 0) 267 return (0); 268 269 /* Establish the interrupt. */ 270 sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, 271 pcmcom_intr, sc); 272 if (!sc->sc_ih) 273 return (EIO); 274 275 error = pcmcia_function_enable(sc->sc_pf); 276 if (error) { 277 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 278 sc->sc_ih = 0; 279 } 280 281 return (error); 282 } 283 284 void 285 pcmcom_disable(struct pcmcom_softc *sc) 286 { 287 288 if (--sc->sc_enabled_count != 0) 289 return; 290 291 pcmcia_function_disable(sc->sc_pf); 292 pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); 293 sc->sc_ih = 0; 294 } 295 296 /****** Here begins the com attachment code. ******/ 297 298 #if NCOM_PCMCOM > 0 299 int com_pcmcom_match(device_t, cfdata_t , void *); 300 void com_pcmcom_attach(device_t, device_t, void *); 301 302 /* No pcmcom-specific goo in the softc; it's all in the parent. */ 303 CFATTACH_DECL_NEW(com_pcmcom, sizeof(struct com_softc), 304 com_pcmcom_match, com_pcmcom_attach, com_detach, NULL); 305 306 int com_pcmcom_enable(struct com_softc *); 307 void com_pcmcom_disable(struct com_softc *); 308 309 int 310 com_pcmcom_match(device_t parent, cfdata_t cf, void *aux) 311 { 312 313 /* Device is always present. */ 314 return (1); 315 } 316 317 void 318 com_pcmcom_attach(device_t parent, device_t self, void *aux) 319 { 320 struct com_softc *sc = device_private(self); 321 struct pcmcom_attach_args *pca = aux; 322 323 sc->sc_dev = self; 324 com_init_regs(&sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1); 325 sc->enabled = 1; 326 327 sc->sc_frequency = COM_FREQ; 328 329 sc->enable = com_pcmcom_enable; 330 sc->disable = com_pcmcom_disable; 331 332 com_attach_subr(sc); 333 334 sc->enabled = 0; 335 } 336 337 int 338 com_pcmcom_enable(struct com_softc *sc) 339 { 340 return pcmcom_enable(device_private(device_parent(sc->sc_dev))); 341 } 342 343 void 344 com_pcmcom_disable(struct com_softc *sc) 345 { 346 347 pcmcom_disable(device_private(device_parent(sc->sc_dev))); 348 } 349 #endif /* NCOM_PCMCOM > 0 */ 350
Indexes created Fri Sep 26 20:09:58 GMT 2025