pcppi.c revision 1.16
1 /* $NetBSD: pcppi.c,v 1.16 2005/03/25 23:09:00 cube 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 1.16 2005/03/25 23:09:00 cube 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 43 #include <machine/bus.h> 44 45 #include <dev/ic/attimervar.h> 46 47 #include <dev/isa/isareg.h> 48 #include <dev/isa/isavar.h> 49 #include <dev/isa/pcppireg.h> 50 #include <dev/isa/pcppivar.h> 51 52 #include "pckbd.h" 53 #if NPCKBD > 0 54 #include <dev/pckbport/pckbdvar.h> 55 56 void pcppi_pckbd_bell(void *, u_int, u_int, u_int, int); 57 #endif 58 59 int pcppi_match(struct device *, struct cfdata *, void *); 60 void pcppi_isa_attach(struct device *, struct device *, void *); 61 62 CFATTACH_DECL(pcppi, sizeof(struct pcppi_softc), 63 pcppi_match, pcppi_isa_attach, NULL, NULL); 64 65 static void pcppi_bell_stop(void*); 66 67 #if NATTIMER > 0 68 static void pcppi_attach_speaker(struct device *); 69 #endif 70 71 #define PCPPIPRI (PZERO - 1) 72 73 int 74 pcppi_match(struct device *parent, struct cfdata *match, void *aux) 75 { 76 struct isa_attach_args *ia = aux; 77 bus_space_handle_t ppi_ioh; 78 int have_ppi, rv; 79 u_int8_t v, nv; 80 81 if (ISA_DIRECT_CONFIG(ia)) 82 return (0); 83 84 /* If values are hardwired to something that they can't be, punt. */ 85 if (ia->ia_nio < 1 || 86 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 87 ia->ia_io[0].ir_addr != IO_PPI)) 88 return (0); 89 90 if (ia->ia_niomem > 0 && 91 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 92 return (0); 93 94 if (ia->ia_nirq > 0 && 95 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 96 return (0); 97 98 if (ia->ia_ndrq > 0 && 99 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 100 return (0); 101 102 rv = 0; 103 have_ppi = 0; 104 105 if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh)) 106 goto lose; 107 have_ppi = 1; 108 109 /* 110 * Check for existence of PPI. Realistically, this is either going to 111 * be here or nothing is going to be here. 112 * 113 * We don't want to have any chance of changing speaker output (which 114 * this test might, if it crashes in the middle, or something; 115 * normally it's be to quick to produce anthing audible), but 116 * many "combo chip" mock-PPI's don't seem to support the top bit 117 * of Port B as a settable bit. The bottom bit has to be settable, 118 * since the speaker driver hardware still uses it. 119 */ 120 v = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 121 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */ 122 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 123 if (((nv ^ v) & 0x01) == 0x01) 124 rv = 1; 125 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */ 126 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 127 if (((nv ^ v) & 0x01) != 0x00) { 128 rv = 0; 129 goto lose; 130 } 131 132 /* 133 * We assume that the programmable interval timer is there. 134 */ 135 136 lose: 137 if (have_ppi) 138 bus_space_unmap(ia->ia_iot, ppi_ioh, 1); 139 if (rv) { 140 ia->ia_io[0].ir_addr = IO_PPI; 141 ia->ia_io[0].ir_size = 1; 142 ia->ia_nio = 1; 143 144 ia->ia_niomem = 0; 145 ia->ia_nirq = 0; 146 ia->ia_ndrq = 0; 147 } 148 return (rv); 149 } 150 151 void 152 pcppi_isa_attach(struct device *parent, struct device *self, void *aux) 153 { 154 struct pcppi_softc *sc = (struct pcppi_softc *)self; 155 struct isa_attach_args *ia = aux; 156 bus_space_tag_t iot; 157 158 sc->sc_iot = iot = ia->ia_iot; 159 160 if (bus_space_map(iot, IO_PPI, 1, 0, &sc->sc_ppi_ioh)) 161 panic("pcppi_attach: couldn't map"); 162 163 printf("\n"); 164 165 pcppi_attach(sc); 166 } 167 168 void 169 pcppi_attach(struct pcppi_softc *sc) 170 { 171 struct pcppi_attach_args pa; 172 173 callout_init(&sc->sc_bell_ch); 174 175 sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0; 176 177 #if NPCKBD > 0 178 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 179 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 180 #endif 181 #if NATTIMER > 0 182 config_defer((struct device *)sc, pcppi_attach_speaker); 183 #endif 184 185 pa.pa_cookie = sc; 186 while (config_found((struct device *)sc, &pa, 0)); 187 } 188 189 #if NATTIMER > 0 190 static void 191 pcppi_attach_speaker(struct device *self) 192 { 193 struct pcppi_softc *sc = (struct pcppi_softc *)self; 194 195 if ((sc->sc_timer = attimer_attach_speaker()) == NULL) 196 aprint_error("%s: could not find any available timer\n", 197 sc->sc_dv.dv_xname); 198 else 199 aprint_normal("%s: attached to %s\n", sc->sc_dv.dv_xname, 200 sc->sc_timer->sc_dev.dv_xname); 201 } 202 #endif 203 204 void 205 pcppi_bell(pcppi_tag_t self, int pitch, int period, int slp) 206 { 207 struct pcppi_softc *sc = self; 208 int s; 209 210 s = spltty(); /* ??? */ 211 if (sc->sc_bellactive) { 212 if (sc->sc_timeout) { 213 sc->sc_timeout = 0; 214 callout_stop(&sc->sc_bell_ch); 215 } 216 if (sc->sc_slp) 217 wakeup(pcppi_bell_stop); 218 } 219 if (pitch == 0 || period == 0) { 220 pcppi_bell_stop(sc); 221 sc->sc_bellpitch = 0; 222 splx(s); 223 return; 224 } 225 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 226 #if NATTIMER > 0 227 if (sc->sc_timer != NULL) 228 attimer_set_pitch(sc->sc_timer, pitch); 229 #endif 230 /* enable speaker */ 231 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 232 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 233 | PIT_SPKR); 234 } 235 sc->sc_bellpitch = pitch; 236 237 sc->sc_bellactive = 1; 238 if (slp & PCPPI_BELL_POLL) { 239 delay((period * 1000000) / hz); 240 pcppi_bell_stop(sc); 241 } else { 242 sc->sc_timeout = 1; 243 callout_reset(&sc->sc_bell_ch, period, pcppi_bell_stop, sc); 244 if (slp & PCPPI_BELL_SLEEP) { 245 sc->sc_slp = 1; 246 tsleep(pcppi_bell_stop, PCPPIPRI | PCATCH, "bell", 0); 247 sc->sc_slp = 0; 248 } 249 } 250 splx(s); 251 } 252 253 static void 254 pcppi_bell_stop(void *arg) 255 { 256 struct pcppi_softc *sc = arg; 257 int s; 258 259 s = spltty(); /* ??? */ 260 sc->sc_timeout = 0; 261 262 /* disable bell */ 263 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 264 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 265 & ~PIT_SPKR); 266 sc->sc_bellactive = 0; 267 if (sc->sc_slp) 268 wakeup(pcppi_bell_stop); 269 splx(s); 270 } 271 272 #if NPCKBD > 0 273 void 274 pcppi_pckbd_bell(void *arg, u_int pitch, u_int period, u_int volume, int poll) 275 { 276 277 /* 278 * Comes in as ms, goes out at ticks; volume ignored. 279 */ 280 pcppi_bell(arg, pitch, (period * hz) / 1000, 281 poll ? PCPPI_BELL_POLL : 0); 282 } 283 #endif /* NPCKBD > 0 */ 284
Indexes created Fri Oct 03 02:09:57 GMT 2025