| 1 | /* $NetBSD: cir.c,v 1.32 2016/07/14 10:19:06 msaitoh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2001 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Lennart Augustsson (lennart@augustsson.net). |
| 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 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: cir.c,v 1.32 2016/07/14 10:19:06 msaitoh Exp $" ); |
| 34 | |
| 35 | #include <sys/param.h> |
| 36 | #include <sys/systm.h> |
| 37 | #include <sys/ioctl.h> |
| 38 | #include <sys/kernel.h> |
| 39 | #include <sys/device.h> |
| 40 | #include <sys/conf.h> |
| 41 | #include <sys/poll.h> |
| 42 | #include <sys/select.h> |
| 43 | #include <sys/vnode.h> |
| 44 | #include <sys/module.h> |
| 45 | |
| 46 | #include <dev/ir/ir.h> |
| 47 | #include <dev/ir/cirio.h> |
| 48 | #include <dev/ir/cirvar.h> |
| 49 | |
| 50 | dev_type_open(ciropen); |
| 51 | dev_type_close(circlose); |
| 52 | dev_type_read(cirread); |
| 53 | dev_type_write(cirwrite); |
| 54 | dev_type_ioctl(cirioctl); |
| 55 | dev_type_poll(cirpoll); |
| 56 | |
| 57 | const struct cdevsw cir_cdevsw = { |
| 58 | .d_open = ciropen, |
| 59 | .d_close = circlose, |
| 60 | .d_read = cirread, |
| 61 | .d_write = cirwrite, |
| 62 | .d_ioctl = cirioctl, |
| 63 | .d_stop = nostop, |
| 64 | .d_tty = notty, |
| 65 | .d_poll = cirpoll, |
| 66 | .d_mmap = nommap, |
| 67 | .d_kqfilter = nokqfilter, |
| 68 | .d_discard = nodiscard, |
| 69 | .d_flag = D_OTHER |
| 70 | }; |
| 71 | |
| 72 | int cir_match(device_t parent, cfdata_t match, void *aux); |
| 73 | void cir_attach(device_t parent, device_t self, void *aux); |
| 74 | int cir_detach(device_t self, int flags); |
| 75 | |
| 76 | CFATTACH_DECL_NEW(cir, sizeof(struct cir_softc), |
| 77 | cir_match, cir_attach, cir_detach, NULL); |
| 78 | |
| 79 | extern struct cfdriver cir_cd; |
| 80 | |
| 81 | #define CIRUNIT(dev) (minor(dev)) |
| 82 | |
| 83 | int |
| 84 | cir_match(device_t parent, cfdata_t match, void *aux) |
| 85 | { |
| 86 | struct ir_attach_args *ia = aux; |
| 87 | |
| 88 | return (ia->ia_type == IR_TYPE_CIR); |
| 89 | } |
| 90 | |
| 91 | void |
| 92 | cir_attach(device_t parent, device_t self, void *aux) |
| 93 | { |
| 94 | struct cir_softc *sc = device_private(self); |
| 95 | struct ir_attach_args *ia = aux; |
| 96 | |
| 97 | sc->sc_dev = self; |
| 98 | |
| 99 | selinit(&sc->sc_rdsel); |
| 100 | sc->sc_methods = ia->ia_methods; |
| 101 | sc->sc_handle = ia->ia_handle; |
| 102 | |
| 103 | #ifdef DIAGNOSTIC |
| 104 | if (sc->sc_methods->im_read == NULL || |
| 105 | sc->sc_methods->im_write == NULL || |
| 106 | sc->sc_methods->im_setparams == NULL) |
| 107 | panic("%s: missing methods" , device_xname(sc->sc_dev)); |
| 108 | #endif |
| 109 | aprint_naive("\n" ); |
| 110 | aprint_normal("\n" ); |
| 111 | } |
| 112 | |
| 113 | int |
| 114 | cir_detach(device_t self, int flags) |
| 115 | { |
| 116 | struct cir_softc *sc = device_private(self); |
| 117 | int maj, mn; |
| 118 | |
| 119 | /* locate the major number */ |
| 120 | maj = cdevsw_lookup_major(&cir_cdevsw); |
| 121 | |
| 122 | /* Nuke the vnodes for any open instances (calls close). */ |
| 123 | mn = device_unit(self); |
| 124 | vdevgone(maj, mn, mn, VCHR); |
| 125 | |
| 126 | seldestroy(&sc->sc_rdsel); |
| 127 | |
| 128 | return (0); |
| 129 | } |
| 130 | |
| 131 | int |
| 132 | ciropen(dev_t dev, int flag, int mode, struct lwp *l) |
| 133 | { |
| 134 | struct cir_softc *sc; |
| 135 | int error; |
| 136 | |
| 137 | sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); |
| 138 | if (sc == NULL) |
| 139 | return (ENXIO); |
| 140 | if (!device_is_active(sc->sc_dev)) |
| 141 | return (EIO); |
| 142 | if (sc->sc_open) |
| 143 | return (EBUSY); |
| 144 | |
| 145 | sc->sc_rdframes = 0; |
| 146 | if (sc->sc_methods->im_open != NULL) { |
| 147 | error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, |
| 148 | l->l_proc); |
| 149 | if (error) |
| 150 | return (error); |
| 151 | } |
| 152 | sc->sc_open = 1; |
| 153 | return (0); |
| 154 | } |
| 155 | |
| 156 | int |
| 157 | circlose(dev_t dev, int flag, int mode, struct lwp *l) |
| 158 | { |
| 159 | struct cir_softc *sc; |
| 160 | int error; |
| 161 | |
| 162 | sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); |
| 163 | if (sc == NULL) |
| 164 | return (ENXIO); |
| 165 | if (sc->sc_methods->im_close != NULL) |
| 166 | error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, |
| 167 | l->l_proc); |
| 168 | else |
| 169 | error = 0; |
| 170 | sc->sc_open = 0; |
| 171 | return (error); |
| 172 | } |
| 173 | |
| 174 | int |
| 175 | cirread(dev_t dev, struct uio *uio, int flag) |
| 176 | { |
| 177 | struct cir_softc *sc; |
| 178 | |
| 179 | sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); |
| 180 | if (sc == NULL) |
| 181 | return (ENXIO); |
| 182 | if (!device_is_active(sc->sc_dev)) |
| 183 | return (EIO); |
| 184 | return (sc->sc_methods->im_read(sc->sc_handle, uio, flag)); |
| 185 | } |
| 186 | |
| 187 | int |
| 188 | cirwrite(dev_t dev, struct uio *uio, int flag) |
| 189 | { |
| 190 | struct cir_softc *sc; |
| 191 | |
| 192 | sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); |
| 193 | if (sc == NULL) |
| 194 | return (ENXIO); |
| 195 | if (!device_is_active(sc->sc_dev)) |
| 196 | return (EIO); |
| 197 | return (sc->sc_methods->im_write(sc->sc_handle, uio, flag)); |
| 198 | } |
| 199 | |
| 200 | int |
| 201 | cirioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) |
| 202 | { |
| 203 | struct cir_softc *sc; |
| 204 | int error; |
| 205 | |
| 206 | sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); |
| 207 | if (sc == NULL) |
| 208 | return (ENXIO); |
| 209 | if (!device_is_active(sc->sc_dev)) |
| 210 | return (EIO); |
| 211 | |
| 212 | switch (cmd) { |
| 213 | case FIONBIO: |
| 214 | /* All handled in the upper FS layer. */ |
| 215 | error = 0; |
| 216 | break; |
| 217 | case CIR_GET_PARAMS: |
| 218 | *(struct cir_params *)addr = sc->sc_params; |
| 219 | error = 0; |
| 220 | break; |
| 221 | case CIR_SET_PARAMS: |
| 222 | error = sc->sc_methods->im_setparams(sc->sc_handle, |
| 223 | (struct cir_params *)addr); |
| 224 | if (!error) |
| 225 | sc->sc_params = *(struct cir_params *)addr; |
| 226 | break; |
| 227 | default: |
| 228 | error = EINVAL; |
| 229 | break; |
| 230 | } |
| 231 | return (error); |
| 232 | } |
| 233 | |
| 234 | int |
| 235 | cirpoll(dev_t dev, int events, struct lwp *l) |
| 236 | { |
| 237 | struct cir_softc *sc; |
| 238 | int revents; |
| 239 | int s; |
| 240 | |
| 241 | sc = device_lookup_private(&cir_cd, CIRUNIT(dev)); |
| 242 | if (sc == NULL) |
| 243 | return (POLLERR); |
| 244 | if (!device_is_active(sc->sc_dev)) |
| 245 | return (POLLERR); |
| 246 | |
| 247 | revents = 0; |
| 248 | s = splir(); |
| 249 | if (events & (POLLIN | POLLRDNORM)) |
| 250 | if (sc->sc_rdframes > 0) |
| 251 | revents |= events & (POLLIN | POLLRDNORM); |
| 252 | |
| 253 | #if 0 |
| 254 | /* How about write? */ |
| 255 | if (events & (POLLOUT | POLLWRNORM)) |
| 256 | if (/* ??? */) |
| 257 | revents |= events & (POLLOUT | POLLWRNORM); |
| 258 | #endif |
| 259 | |
| 260 | if (revents == 0) { |
| 261 | if (events & (POLLIN | POLLRDNORM)) |
| 262 | selrecord(l, &sc->sc_rdsel); |
| 263 | |
| 264 | #if 0 |
| 265 | if (events & (POLLOUT | POLLWRNORM)) |
| 266 | selrecord(p, &sc->sc_wrsel); |
| 267 | #endif |
| 268 | } |
| 269 | |
| 270 | splx(s); |
| 271 | return (revents); |
| 272 | } |
| 273 | |
| 274 | MODULE(MODULE_CLASS_DRIVER, cir, "ir" ); |
| 275 | |
| 276 | #ifdef _MODULE |
| 277 | #include "ioconf.c" |
| 278 | #endif |
| 279 | |
| 280 | static int |
| 281 | cir_modcmd(modcmd_t cmd, void *opaque) |
| 282 | { |
| 283 | int error = 0; |
| 284 | #ifdef _MODULE |
| 285 | int bmaj = -1, cmaj = -1; |
| 286 | #endif |
| 287 | |
| 288 | switch (cmd) { |
| 289 | case MODULE_CMD_INIT: |
| 290 | #ifdef _MODULE |
| 291 | error = config_init_component(cfdriver_ioconf_cir, |
| 292 | cfattach_ioconf_cir, cfdata_ioconf_cir); |
| 293 | if (error) |
| 294 | return error; |
| 295 | error = devsw_attach("cir" , NULL, &bmaj, &cir_cdevsw, &cmaj); |
| 296 | if (error) |
| 297 | config_fini_component(cfdriver_ioconf_cir, |
| 298 | cfattach_ioconf_cir, cfdata_ioconf_cir); |
| 299 | #endif |
| 300 | return error; |
| 301 | case MODULE_CMD_FINI: |
| 302 | #ifdef _MODULE |
| 303 | devsw_detach(NULL, &cir_cdevsw); |
| 304 | return config_fini_component(cfdriver_ioconf_cir, |
| 305 | cfattach_ioconf_cir, cfdata_ioconf_cir); |
| 306 | #endif |
| 307 | return error; |
| 308 | default: |
| 309 | return ENOTTY; |
| 310 | } |
| 311 | } |
| 312 | |