pcppi.c revision 1.42.16.2
1 /* $NetBSD: pcppi.c,v 1.42.16.2 2015/06/06 14:40:08 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: pcppi.c,v 1.42.16.2 2015/06/06 14:40:08 skrll Exp $"); 32 33 #include "attimer.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/callout.h> 38 #include <sys/kernel.h> 39 #include <sys/proc.h> 40 #include <sys/device.h> 41 #include <sys/errno.h> 42 #include <sys/bus.h> 43 #include <sys/mutex.h> 44 #include <sys/condvar.h> 45 #include <sys/tty.h> 46 47 #include <dev/ic/attimervar.h> 48 49 #include <dev/isa/isareg.h> 50 #include <dev/isa/isavar.h> 51 #include <dev/isa/pcppireg.h> 52 #include <dev/isa/pcppivar.h> 53 54 #include "pckbd.h" 55 #if NPCKBD > 0 56 #include <dev/pckbport/pckbdvar.h> 57 58 void pcppi_pckbd_bell(void *, u_int, u_int, u_int, int); 59 #endif 60 61 int pcppi_match(device_t, cfdata_t, void *); 62 void pcppi_isa_attach(device_t, device_t, void *); 63 void pcppi_childdet(device_t, device_t); 64 int pcppi_rescan(device_t, const char *, const int *); 65 66 CFATTACH_DECL3_NEW(pcppi, sizeof(struct pcppi_softc), 67 pcppi_match, pcppi_isa_attach, pcppi_detach, NULL, pcppi_rescan, 68 pcppi_childdet, DVF_DETACH_SHUTDOWN); 69 70 static int pcppisearch(device_t, cfdata_t, const int *, void *); 71 static void pcppi_bell_stop(struct pcppi_softc *); 72 static void pcppi_bell_callout(void *); 73 74 #if NATTIMER > 0 75 static void pcppi_attach_speaker(device_t); 76 static void pcppi_detach_speaker(struct pcppi_softc *); 77 #endif 78 79 int 80 pcppi_match(device_t parent, cfdata_t match, void *aux) 81 { 82 struct isa_attach_args *ia = aux; 83 bus_space_handle_t ppi_ioh; 84 int have_ppi, rv; 85 u_int8_t v, nv; 86 87 if (ISA_DIRECT_CONFIG(ia)) 88 return (0); 89 90 /* If values are hardwired to something that they can't be, punt. */ 91 if (ia->ia_nio < 1 || 92 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 93 ia->ia_io[0].ir_addr != IO_PPI)) 94 return (0); 95 96 if (ia->ia_niomem > 0 && 97 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 98 return (0); 99 100 if (ia->ia_nirq > 0 && 101 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 102 return (0); 103 104 if (ia->ia_ndrq > 0 && 105 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 106 return (0); 107 108 rv = 0; 109 have_ppi = 0; 110 111 if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh)) 112 goto lose; 113 have_ppi = 1; 114 115 /* 116 * Check for existence of PPI. Realistically, this is either going to 117 * be here or nothing is going to be here. 118 * 119 * We don't want to have any chance of changing speaker output (which 120 * this test might, if it crashes in the middle, or something; 121 * normally it's be to quick to produce anthing audible), but 122 * many "combo chip" mock-PPI's don't seem to support the top bit 123 * of Port B as a settable bit. The bottom bit has to be settable, 124 * since the speaker driver hardware still uses it. 125 */ 126 v = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 127 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */ 128 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 129 if (((nv ^ v) & 0x01) == 0x01) 130 rv = 1; 131 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */ 132 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 133 if (((nv ^ v) & 0x01) != 0x00) { 134 rv = 0; 135 goto lose; 136 } 137 138 /* 139 * We assume that the programmable interval timer is there. 140 */ 141 142 lose: 143 if (have_ppi) 144 bus_space_unmap(ia->ia_iot, ppi_ioh, 1); 145 if (rv) { 146 ia->ia_io[0].ir_addr = IO_PPI; 147 ia->ia_io[0].ir_size = 1; 148 ia->ia_nio = 1; 149 150 ia->ia_niomem = 0; 151 ia->ia_nirq = 0; 152 ia->ia_ndrq = 0; 153 } 154 return (rv); 155 } 156 157 void 158 pcppi_isa_attach(device_t parent, device_t self, void *aux) 159 { 160 struct pcppi_softc *sc = device_private(self); 161 struct isa_attach_args *ia = aux; 162 bus_space_tag_t iot; 163 164 sc->sc_dv = self; 165 sc->sc_iot = iot = ia->ia_iot; 166 167 sc->sc_size = 1; 168 if (bus_space_map(iot, IO_PPI, sc->sc_size, 0, &sc->sc_ppi_ioh)) 169 panic("pcppi_attach: couldn't map"); 170 171 aprint_naive("\n"); 172 aprint_normal("\n"); 173 pcppi_attach(sc); 174 } 175 176 void 177 pcppi_childdet(device_t self, device_t child) 178 { 179 180 /* we hold no child references, so do nothing */ 181 } 182 183 int 184 pcppi_detach(device_t self, int flags) 185 { 186 int rc; 187 struct pcppi_softc *sc = device_private(self); 188 189 #if NATTIMER > 0 190 pcppi_detach_speaker(sc); 191 #endif 192 193 if ((rc = config_detach_children(sc->sc_dv, flags)) != 0) 194 return rc; 195 196 pmf_device_deregister(self); 197 198 #if NPCKBD > 0 199 pckbd_unhook_bell(pcppi_pckbd_bell, sc); 200 #endif 201 mutex_spin_enter(&tty_lock); 202 pcppi_bell_stop(sc); 203 mutex_spin_exit(&tty_lock); 204 205 callout_halt(&sc->sc_bell_ch, NULL); 206 callout_destroy(&sc->sc_bell_ch); 207 208 cv_destroy(&sc->sc_slp); 209 210 bus_space_unmap(sc->sc_iot, sc->sc_ppi_ioh, sc->sc_size); 211 212 return 0; 213 } 214 215 void 216 pcppi_attach(struct pcppi_softc *sc) 217 { 218 device_t self = sc->sc_dv; 219 220 callout_init(&sc->sc_bell_ch, CALLOUT_MPSAFE); 221 callout_setfunc(&sc->sc_bell_ch, pcppi_bell_callout, sc); 222 cv_init(&sc->sc_slp, "bell"); 223 224 sc->sc_bellactive = sc->sc_bellpitch = 0; 225 226 #if NPCKBD > 0 227 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 228 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 229 #endif 230 #if NATTIMER > 0 231 config_defer(sc->sc_dv, pcppi_attach_speaker); 232 #endif 233 if (!pmf_device_register(self, NULL, NULL)) 234 aprint_error_dev(self, "couldn't establish power handler\n"); 235 236 pcppi_rescan(self, "pcppi", NULL); 237 } 238 239 int 240 pcppi_rescan(device_t self, const char *ifattr, const int *flags) 241 { 242 struct pcppi_softc *sc = device_private(self); 243 struct pcppi_attach_args pa; 244 245 if (!ifattr_match(ifattr, "pcppi")) 246 return 0; 247 248 pa.pa_cookie = sc; 249 config_search_loc(pcppisearch, sc->sc_dv, "pcppi", NULL, &pa); 250 251 return 0; 252 } 253 254 static int 255 pcppisearch(device_t parent, cfdata_t cf, const int *locs, void *aux) 256 { 257 258 if (config_match(parent, cf, aux)) 259 config_attach_loc(parent, cf, locs, aux, NULL); 260 261 return 0; 262 } 263 264 #if NATTIMER > 0 265 static void 266 pcppi_detach_speaker(struct pcppi_softc *sc) 267 { 268 if (sc->sc_timer != NULL) { 269 attimer_detach_speaker(sc->sc_timer); 270 sc->sc_timer = NULL; 271 } 272 } 273 274 static void 275 pcppi_attach_speaker(device_t self) 276 { 277 struct pcppi_softc *sc = device_private(self); 278 279 if ((sc->sc_timer = attimer_attach_speaker()) == NULL) 280 aprint_error_dev(self, "could not find any available timer\n"); 281 else { 282 aprint_normal_dev(sc->sc_timer, "attached to %s\n", 283 device_xname(self)); 284 } 285 } 286 #endif 287 288 void 289 pcppi_bell(pcppi_tag_t self, int pitch, int period, int slp) 290 { 291 292 mutex_spin_enter(&tty_lock); 293 pcppi_bell_locked(self, pitch, period, slp); 294 mutex_spin_exit(&tty_lock); 295 } 296 297 void 298 pcppi_bell_locked(pcppi_tag_t self, int pitch, int period, int slp) 299 { 300 struct pcppi_softc *sc = self; 301 302 if (sc->sc_bellactive) { 303 if (sc->sc_timeout) { 304 sc->sc_timeout = 0; 305 callout_stop(&sc->sc_bell_ch); 306 } 307 cv_broadcast(&sc->sc_slp); 308 } 309 if (pitch == 0 || period == 0) { 310 pcppi_bell_stop(sc); 311 sc->sc_bellpitch = 0; 312 return; 313 } 314 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 315 #if NATTIMER > 0 316 if (sc->sc_timer != NULL) 317 attimer_set_pitch(sc->sc_timer, pitch); 318 #endif 319 /* enable speaker */ 320 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 321 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 322 | PIT_SPKR); 323 } 324 sc->sc_bellpitch = pitch; 325 326 sc->sc_bellactive = 1; 327 if (slp & PCPPI_BELL_POLL) { 328 delay((period * 1000000) / hz); 329 pcppi_bell_stop(sc); 330 } else { 331 sc->sc_timeout = 1; 332 callout_schedule(&sc->sc_bell_ch, period); 333 if (slp & PCPPI_BELL_SLEEP) { 334 cv_wait_sig(&sc->sc_slp, &tty_lock); 335 } 336 } 337 } 338 339 static void 340 pcppi_bell_callout(void *arg) 341 { 342 struct pcppi_softc *sc = arg; 343 344 mutex_spin_enter(&tty_lock); 345 if (sc->sc_timeout != 0) { 346 pcppi_bell_stop(sc); 347 } 348 mutex_spin_exit(&tty_lock); 349 } 350 351 static void 352 pcppi_bell_stop(struct pcppi_softc *sc) 353 { 354 355 sc->sc_timeout = 0; 356 357 /* disable bell */ 358 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 359 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 360 & ~PIT_SPKR); 361 sc->sc_bellactive = 0; 362 cv_broadcast(&sc->sc_slp); 363 } 364 365 #if NPCKBD > 0 366 void 367 pcppi_pckbd_bell(void *arg, u_int pitch, u_int period, u_int volume, 368 int poll) 369 { 370 371 /* 372 * Comes in as ms, goes out at ticks; volume ignored. 373 */ 374 pcppi_bell_locked(arg, pitch, (period * hz) / 1000, 375 poll ? PCPPI_BELL_POLL : 0); 376 } 377 #endif /* NPCKBD > 0 */ 378
Indexes created Thu Oct 02 14:10:14 GMT 2025