pcppi.c revision 1.37
1 /* $NetBSD: pcppi.c,v 1.37 2011/05/24 09:28:03 mrg 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 1.37 2011/05/24 09:28:03 mrg 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 46 #include <dev/ic/attimervar.h> 47 48 #include <dev/isa/isareg.h> 49 #include <dev/isa/isavar.h> 50 #include <dev/isa/pcppireg.h> 51 #include <dev/isa/pcppivar.h> 52 53 #include "pckbd.h" 54 #if NPCKBD > 0 55 #include <dev/pckbport/pckbdvar.h> 56 57 void pcppi_pckbd_bell(void *, u_int, u_int, u_int, int); 58 #endif 59 60 int pcppi_match(device_t, cfdata_t, void *); 61 void pcppi_isa_attach(device_t, device_t, void *); 62 void pcppi_childdet(device_t, device_t); 63 64 CFATTACH_DECL3_NEW(pcppi, sizeof(struct pcppi_softc), 65 pcppi_match, pcppi_isa_attach, pcppi_detach, NULL, NULL, pcppi_childdet, 66 DVF_DETACH_SHUTDOWN); 67 68 static int pcppisearch(device_t, cfdata_t, const int *, void *); 69 static void pcppi_bell_stop_unlocked(void*); 70 static void pcppi_bell_stop(void*); 71 72 #if NATTIMER > 0 73 static void pcppi_attach_speaker(device_t); 74 static void pcppi_detach_speaker(struct pcppi_softc *); 75 #endif 76 77 #define PCPPIPRI (PZERO - 1) 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_normal("\n"); 172 pcppi_attach(sc); 173 } 174 175 void 176 pcppi_childdet(device_t self, device_t child) 177 { 178 /* we hold no child references, so do nothing */ 179 } 180 181 int 182 pcppi_detach(device_t self, int flags) 183 { 184 int rc; 185 struct pcppi_softc *sc = device_private(self); 186 187 #if NATTIMER > 0 188 pcppi_detach_speaker(sc); 189 #endif 190 191 if ((rc = config_detach_children(sc->sc_dv, flags)) != 0) 192 return rc; 193 194 pmf_device_deregister(self); 195 196 #if NPCKBD > 0 197 pckbd_unhook_bell(pcppi_pckbd_bell, sc); 198 #endif 199 pcppi_bell_stop(sc); 200 201 callout_stop(&sc->sc_bell_ch); 202 callout_destroy(&sc->sc_bell_ch); 203 bus_space_unmap(sc->sc_iot, sc->sc_ppi_ioh, sc->sc_size); 204 205 mutex_destroy(&sc->sc_lock); 206 cv_destroy(&sc->sc_stop_cv); 207 208 return 0; 209 } 210 211 void 212 pcppi_attach(struct pcppi_softc *sc) 213 { 214 struct pcppi_attach_args pa; 215 device_t self = sc->sc_dv; 216 217 callout_init(&sc->sc_bell_ch, 0); 218 219 sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0; 220 221 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM); 222 cv_init(&sc->sc_stop_cv, "bell"); 223 224 #if NPCKBD > 0 225 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 226 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 227 #endif 228 #if NATTIMER > 0 229 config_defer(sc->sc_dv, pcppi_attach_speaker); 230 #endif 231 if (!device_pmf_is_registered(self)) 232 if (!pmf_device_register(self, NULL, NULL)) 233 aprint_error_dev(self, 234 "couldn't establish power handler\n"); 235 236 pa.pa_cookie = sc; 237 config_search_loc(pcppisearch, sc->sc_dv, "pcppi", NULL, &pa); 238 } 239 240 static int 241 pcppisearch(device_t parent, cfdata_t cf, const int *locs, void *aux) 242 { 243 244 if (config_match(parent, cf, aux)) 245 config_attach_loc(parent, cf, locs, aux, NULL); 246 247 return 0; 248 } 249 250 #if NATTIMER > 0 251 static void 252 pcppi_detach_speaker(struct pcppi_softc *sc) 253 { 254 if (sc->sc_timer != NULL) { 255 attimer_detach_speaker(sc->sc_timer); 256 sc->sc_timer = NULL; 257 } 258 } 259 260 static void 261 pcppi_attach_speaker(device_t self) 262 { 263 struct pcppi_softc *sc = device_private(self); 264 265 if ((sc->sc_timer = attimer_attach_speaker()) == NULL) 266 aprint_error_dev(self, "could not find any available timer\n"); 267 else { 268 aprint_normal_dev(sc->sc_timer, "attached to %s\n", 269 device_xname(self)); 270 } 271 } 272 #endif 273 274 void 275 pcppi_bell(pcppi_tag_t self, int pitch, int period, int slp) 276 { 277 struct pcppi_softc *sc = self; 278 279 mutex_enter(&sc->sc_lock); 280 if (sc->sc_bellactive) { 281 if (sc->sc_timeout) { 282 sc->sc_timeout = 0; 283 callout_stop(&sc->sc_bell_ch); 284 } 285 if (sc->sc_slp) 286 cv_broadcast(&sc->sc_stop_cv); 287 } 288 if (pitch == 0 || period == 0) { 289 pcppi_bell_stop_unlocked(sc); 290 sc->sc_bellpitch = 0; 291 mutex_exit(&sc->sc_lock); 292 return; 293 } 294 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 295 #if NATTIMER > 0 296 if (sc->sc_timer != NULL) 297 attimer_set_pitch(sc->sc_timer, pitch); 298 #endif 299 /* enable speaker */ 300 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 301 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 302 | PIT_SPKR); 303 } 304 sc->sc_bellpitch = pitch; 305 306 sc->sc_bellactive = 1; 307 if (slp & PCPPI_BELL_POLL) { 308 delay((period * 1000000) / hz); 309 pcppi_bell_stop_unlocked(sc); 310 } else { 311 sc->sc_timeout = 1; 312 callout_reset(&sc->sc_bell_ch, period, pcppi_bell_stop, sc); 313 if (slp & PCPPI_BELL_SLEEP) { 314 sc->sc_slp = 1; 315 cv_wait_sig(&sc->sc_stop_cv, &sc->sc_lock); 316 sc->sc_slp = 0; 317 } 318 } 319 mutex_exit(&sc->sc_lock); 320 } 321 322 static void 323 pcppi_bell_stop_unlocked(void *arg) 324 { 325 struct pcppi_softc *sc = arg; 326 327 sc->sc_timeout = 0; 328 329 /* disable bell */ 330 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 331 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 332 & ~PIT_SPKR); 333 sc->sc_bellactive = 0; 334 if (sc->sc_slp) 335 cv_broadcast(&sc->sc_stop_cv); 336 } 337 338 static void 339 pcppi_bell_stop(void *arg) 340 { 341 struct pcppi_softc *sc = arg; 342 343 mutex_enter(&sc->sc_lock); 344 pcppi_bell_stop_unlocked(arg); 345 mutex_exit(&sc->sc_lock); 346 } 347 348 #if NPCKBD > 0 349 void 350 pcppi_pckbd_bell(void *arg, u_int pitch, u_int period, u_int volume, 351 int poll) 352 { 353 354 /* 355 * Comes in as ms, goes out at ticks; volume ignored. 356 */ 357 pcppi_bell(arg, pitch, (period * hz) / 1000, 358 poll ? PCPPI_BELL_POLL : 0); 359 } 360 #endif /* NPCKBD > 0 */ 361
Indexes created Fri Oct 03 02:09:57 GMT 2025