pcppi.c revision 1.32.14.3
1 /* $NetBSD: pcppi.c,v 1.32.14.3 2011/06/18 22:47:20 bouyer 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 1.32.14.3 2011/06/18 22:47:20 bouyer 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_DECL2_NEW(pcppi, sizeof(struct pcppi_softc), 65 pcppi_match, pcppi_isa_attach, pcppi_detach, NULL, NULL, pcppi_childdet); 66 67 static int pcppisearch(device_t, cfdata_t, const int *, void *); 68 static void pcppi_bell_stop_unlocked(void*); 69 static void pcppi_bell_stop(void*); 70 71 #if NATTIMER > 0 72 static void pcppi_attach_speaker(device_t); 73 #endif 74 75 #define PCPPIPRI (PZERO - 1) 76 77 int 78 pcppi_match(device_t parent, cfdata_t match, void *aux) 79 { 80 struct isa_attach_args *ia = aux; 81 bus_space_handle_t ppi_ioh; 82 int have_ppi, rv; 83 u_int8_t v, nv; 84 85 if (ISA_DIRECT_CONFIG(ia)) 86 return (0); 87 88 /* If values are hardwired to something that they can't be, punt. */ 89 if (ia->ia_nio < 1 || 90 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 91 ia->ia_io[0].ir_addr != IO_PPI)) 92 return (0); 93 94 if (ia->ia_niomem > 0 && 95 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 96 return (0); 97 98 if (ia->ia_nirq > 0 && 99 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 100 return (0); 101 102 if (ia->ia_ndrq > 0 && 103 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 104 return (0); 105 106 rv = 0; 107 have_ppi = 0; 108 109 if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh)) 110 goto lose; 111 have_ppi = 1; 112 113 /* 114 * Check for existence of PPI. Realistically, this is either going to 115 * be here or nothing is going to be here. 116 * 117 * We don't want to have any chance of changing speaker output (which 118 * this test might, if it crashes in the middle, or something; 119 * normally it's be to quick to produce anthing audible), but 120 * many "combo chip" mock-PPI's don't seem to support the top bit 121 * of Port B as a settable bit. The bottom bit has to be settable, 122 * since the speaker driver hardware still uses it. 123 */ 124 v = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 125 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */ 126 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 127 if (((nv ^ v) & 0x01) == 0x01) 128 rv = 1; 129 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */ 130 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 131 if (((nv ^ v) & 0x01) != 0x00) { 132 rv = 0; 133 goto lose; 134 } 135 136 /* 137 * We assume that the programmable interval timer is there. 138 */ 139 140 lose: 141 if (have_ppi) 142 bus_space_unmap(ia->ia_iot, ppi_ioh, 1); 143 if (rv) { 144 ia->ia_io[0].ir_addr = IO_PPI; 145 ia->ia_io[0].ir_size = 1; 146 ia->ia_nio = 1; 147 148 ia->ia_niomem = 0; 149 ia->ia_nirq = 0; 150 ia->ia_ndrq = 0; 151 } 152 return (rv); 153 } 154 155 void 156 pcppi_isa_attach(device_t parent, device_t self, void *aux) 157 { 158 struct pcppi_softc *sc = device_private(self); 159 struct isa_attach_args *ia = aux; 160 bus_space_tag_t iot; 161 162 sc->sc_dv = self; 163 sc->sc_iot = iot = ia->ia_iot; 164 165 sc->sc_size = 1; 166 if (bus_space_map(iot, IO_PPI, sc->sc_size, 0, &sc->sc_ppi_ioh)) 167 panic("pcppi_attach: couldn't map"); 168 169 aprint_normal("\n"); 170 pcppi_attach(sc); 171 } 172 173 void 174 pcppi_childdet(device_t self, device_t child) 175 { 176 /* we hold no child references, so do nothing */ 177 } 178 179 int 180 pcppi_detach(device_t self, int flags) 181 { 182 int rc; 183 struct pcppi_softc *sc = device_private(self); 184 185 if ((rc = config_detach_children(sc->sc_dv, flags)) != 0) 186 return rc; 187 188 pmf_device_deregister(self); 189 190 #if NPCKBD > 0 191 pckbd_unhook_bell(pcppi_pckbd_bell, sc); 192 #endif 193 pcppi_bell_stop(sc); 194 195 callout_stop(&sc->sc_bell_ch); 196 callout_destroy(&sc->sc_bell_ch); 197 bus_space_unmap(sc->sc_iot, sc->sc_ppi_ioh, sc->sc_size); 198 199 mutex_destroy(&sc->sc_lock); 200 cv_destroy(&sc->sc_stop_cv); 201 202 return 0; 203 } 204 205 void 206 pcppi_attach(struct pcppi_softc *sc) 207 { 208 struct pcppi_attach_args pa; 209 device_t self = sc->sc_dv; 210 211 callout_init(&sc->sc_bell_ch, 0); 212 213 sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0; 214 215 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM); 216 cv_init(&sc->sc_stop_cv, "bell"); 217 218 #if NPCKBD > 0 219 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 220 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 221 #endif 222 #if NATTIMER > 0 223 config_defer(sc->sc_dv, pcppi_attach_speaker); 224 #endif 225 if (!device_pmf_is_registered(self)) 226 if (!pmf_device_register(self, NULL, NULL)) 227 aprint_error_dev(self, 228 "couldn't establish power handler\n"); 229 230 pa.pa_cookie = sc; 231 config_search_loc(pcppisearch, sc->sc_dv, "pcppi", NULL, &pa); 232 } 233 234 static int 235 pcppisearch(device_t parent, cfdata_t cf, const int *locs, void *aux) 236 { 237 238 if (config_match(parent, cf, aux)) 239 config_attach_loc(parent, cf, locs, aux, NULL); 240 241 return 0; 242 } 243 244 #if NATTIMER > 0 245 static void 246 pcppi_attach_speaker(device_t self) 247 { 248 struct pcppi_softc *sc = device_private(self); 249 250 if ((sc->sc_timer = attimer_attach_speaker()) == NULL) 251 aprint_error_dev(self, "could not find any available timer\n"); 252 else { 253 aprint_normal_dev(sc->sc_timer, "attached to %s\n", 254 device_xname(self)); 255 } 256 } 257 #endif 258 259 void 260 pcppi_bell(pcppi_tag_t self, int pitch, int period, int slp) 261 { 262 struct pcppi_softc *sc = self; 263 264 mutex_enter(&sc->sc_lock); 265 if (sc->sc_bellactive) { 266 if (sc->sc_timeout) { 267 sc->sc_timeout = 0; 268 callout_stop(&sc->sc_bell_ch); 269 } 270 if (sc->sc_slp) 271 cv_broadcast(&sc->sc_stop_cv); 272 } 273 if (pitch == 0 || period == 0) { 274 pcppi_bell_stop_unlocked(sc); 275 sc->sc_bellpitch = 0; 276 mutex_exit(&sc->sc_lock); 277 return; 278 } 279 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 280 #if NATTIMER > 0 281 if (sc->sc_timer != NULL) 282 attimer_set_pitch(sc->sc_timer, pitch); 283 #endif 284 /* enable speaker */ 285 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 286 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 287 | PIT_SPKR); 288 } 289 sc->sc_bellpitch = pitch; 290 291 sc->sc_bellactive = 1; 292 if (slp & PCPPI_BELL_POLL) { 293 delay((period * 1000000) / hz); 294 pcppi_bell_stop_unlocked(sc); 295 } else { 296 sc->sc_timeout = 1; 297 callout_reset(&sc->sc_bell_ch, period, pcppi_bell_stop, sc); 298 if (slp & PCPPI_BELL_SLEEP) { 299 sc->sc_slp = 1; 300 cv_wait_sig(&sc->sc_stop_cv, &sc->sc_lock); 301 sc->sc_slp = 0; 302 } 303 } 304 mutex_exit(&sc->sc_lock); 305 } 306 307 static void 308 pcppi_bell_stop_unlocked(void *arg) 309 { 310 struct pcppi_softc *sc = arg; 311 312 sc->sc_timeout = 0; 313 314 /* disable bell */ 315 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 316 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 317 & ~PIT_SPKR); 318 sc->sc_bellactive = 0; 319 if (sc->sc_slp) 320 cv_broadcast(&sc->sc_stop_cv); 321 } 322 323 static void 324 pcppi_bell_stop(void *arg) 325 { 326 struct pcppi_softc *sc = arg; 327 328 mutex_enter(&sc->sc_lock); 329 pcppi_bell_stop_unlocked(arg); 330 mutex_exit(&sc->sc_lock); 331 } 332 333 #if NPCKBD > 0 334 void 335 pcppi_pckbd_bell(void *arg, u_int pitch, u_int period, u_int volume, 336 int poll) 337 { 338 339 /* 340 * Comes in as ms, goes out at ticks; volume ignored. 341 */ 342 pcppi_bell(arg, pitch, (period * hz) / 1000, 343 poll ? PCPPI_BELL_POLL : 0); 344 } 345 #endif /* NPCKBD > 0 */ 346
Indexes created Fri Oct 03 02:09:57 GMT 2025