| 1 | /* $NetBSD: pcmcom.c,v 1.40 2012/10/27 17:18:37 chs 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 1.40 2012/10/27 17:18:37 chs 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] = config_found_sm_loc(sc->sc_dev, |
| 177 | "pcmcom" , locs, |
| 178 | &pca, pcmcom_print, config_stdsubmatch); |
| 179 | } |
| 180 | |
| 181 | pcmcom_disable(sc); |
| 182 | sc->sc_state = PCMCOM_ATTACHED; |
| 183 | return; |
| 184 | |
| 185 | fail: |
| 186 | pcmcia_function_unconfigure(pa->pf); |
| 187 | } |
| 188 | |
| 189 | void |
| 190 | pcmcom_childdet(device_t self, device_t child) |
| 191 | { |
| 192 | struct pcmcom_softc *sc = device_private(self); |
| 193 | int slave; |
| 194 | |
| 195 | for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { |
| 196 | if (sc->sc_slaves[slave] == child) |
| 197 | sc->sc_slaves[slave] = NULL; |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | int |
| 202 | pcmcom_detach(device_t self, int flags) |
| 203 | { |
| 204 | struct pcmcom_softc *sc = device_private(self); |
| 205 | int slave, error; |
| 206 | |
| 207 | if (sc->sc_state != PCMCOM_ATTACHED) |
| 208 | return (0); |
| 209 | |
| 210 | for (slave = sc->sc_nslaves - 1; slave >= 0; slave--) { |
| 211 | if (sc->sc_slaves[slave]) { |
| 212 | /* Detach the child. */ |
| 213 | error = config_detach(sc->sc_slaves[slave], flags); |
| 214 | if (error) |
| 215 | return (error); |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | pcmcia_function_unconfigure(sc->sc_pf); |
| 220 | |
| 221 | return (0); |
| 222 | } |
| 223 | |
| 224 | int |
| 225 | pcmcom_print(void *aux, const char *pnp) |
| 226 | { |
| 227 | struct pcmcom_attach_args *pca = aux; |
| 228 | |
| 229 | /* only com's can attach to pcmcom's; easy... */ |
| 230 | if (pnp) |
| 231 | aprint_normal("com at %s" , pnp); |
| 232 | |
| 233 | aprint_normal(" slave %d" , pca->pca_slave); |
| 234 | |
| 235 | return (UNCONF); |
| 236 | } |
| 237 | |
| 238 | int |
| 239 | pcmcom_intr(void *arg) |
| 240 | { |
| 241 | #if NCOM > 0 |
| 242 | struct pcmcom_softc *sc = arg; |
| 243 | int i, rval = 0; |
| 244 | |
| 245 | if (sc->sc_enabled_count == 0) |
| 246 | return (0); |
| 247 | |
| 248 | for (i = 0; i < sc->sc_nslaves; i++) { |
| 249 | if (sc->sc_slaves[i]) |
| 250 | rval |= comintr(sc->sc_slaves[i]); |
| 251 | } |
| 252 | |
| 253 | return (rval); |
| 254 | #else |
| 255 | return (0); |
| 256 | #endif /* NCOM > 0 */ |
| 257 | } |
| 258 | |
| 259 | int |
| 260 | pcmcom_enable(struct pcmcom_softc *sc) |
| 261 | { |
| 262 | int error; |
| 263 | |
| 264 | if (sc->sc_enabled_count++ != 0) |
| 265 | return (0); |
| 266 | |
| 267 | /* Establish the interrupt. */ |
| 268 | sc->sc_ih = pcmcia_intr_establish(sc->sc_pf, IPL_SERIAL, |
| 269 | pcmcom_intr, sc); |
| 270 | if (!sc->sc_ih) |
| 271 | return (EIO); |
| 272 | |
| 273 | error = pcmcia_function_enable(sc->sc_pf); |
| 274 | if (error) { |
| 275 | pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); |
| 276 | sc->sc_ih = 0; |
| 277 | } |
| 278 | |
| 279 | return (error); |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | pcmcom_disable(struct pcmcom_softc *sc) |
| 284 | { |
| 285 | |
| 286 | if (--sc->sc_enabled_count != 0) |
| 287 | return; |
| 288 | |
| 289 | pcmcia_function_disable(sc->sc_pf); |
| 290 | pcmcia_intr_disestablish(sc->sc_pf, sc->sc_ih); |
| 291 | sc->sc_ih = 0; |
| 292 | } |
| 293 | |
| 294 | /****** Here begins the com attachment code. ******/ |
| 295 | |
| 296 | #if NCOM_PCMCOM > 0 |
| 297 | int com_pcmcom_match(device_t, cfdata_t , void *); |
| 298 | void com_pcmcom_attach(device_t, device_t, void *); |
| 299 | |
| 300 | /* No pcmcom-specific goo in the softc; it's all in the parent. */ |
| 301 | CFATTACH_DECL_NEW(com_pcmcom, sizeof(struct com_softc), |
| 302 | com_pcmcom_match, com_pcmcom_attach, com_detach, NULL); |
| 303 | |
| 304 | int com_pcmcom_enable(struct com_softc *); |
| 305 | void com_pcmcom_disable(struct com_softc *); |
| 306 | |
| 307 | int |
| 308 | com_pcmcom_match(device_t parent, cfdata_t cf, void *aux) |
| 309 | { |
| 310 | |
| 311 | /* Device is always present. */ |
| 312 | return (1); |
| 313 | } |
| 314 | |
| 315 | void |
| 316 | com_pcmcom_attach(device_t parent, device_t self, void *aux) |
| 317 | { |
| 318 | struct com_softc *sc = device_private(self); |
| 319 | struct pcmcom_attach_args *pca = aux; |
| 320 | |
| 321 | sc->sc_dev = self; |
| 322 | COM_INIT_REGS(sc->sc_regs, pca->pca_iot, pca->pca_ioh, -1); |
| 323 | sc->enabled = 1; |
| 324 | |
| 325 | sc->sc_frequency = COM_FREQ; |
| 326 | |
| 327 | sc->enable = com_pcmcom_enable; |
| 328 | sc->disable = com_pcmcom_disable; |
| 329 | |
| 330 | com_attach_subr(sc); |
| 331 | |
| 332 | sc->enabled = 0; |
| 333 | } |
| 334 | |
| 335 | int |
| 336 | com_pcmcom_enable(struct com_softc *sc) |
| 337 | { |
| 338 | return pcmcom_enable(device_private(device_parent(sc->sc_dev))); |
| 339 | } |
| 340 | |
| 341 | void |
| 342 | com_pcmcom_disable(struct com_softc *sc) |
| 343 | { |
| 344 | |
| 345 | pcmcom_disable(device_private(device_parent(sc->sc_dev))); |
| 346 | } |
| 347 | #endif /* NCOM_PCMCOM > 0 */ |
| 348 | |