pcppi.c revision 1.2
1 /* $NetBSD: pcppi.c,v 1.2 2000/03/06 21:40:08 thorpej 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/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/proc.h> 34 #include <sys/device.h> 35 #include <sys/errno.h> 36 37 #include <machine/bus.h> 38 39 #include <dev/isa/isareg.h> 40 #include <dev/isa/isavar.h> 41 #include <dev/isa/pcppireg.h> 42 #include <dev/isa/pcppivar.h> 43 44 #include <dev/ic/i8253reg.h> 45 46 #include "pckbd.h" 47 #if NPCKBD > 0 48 #include <dev/ic/pckbcvar.h> 49 #include <dev/pckbc/pckbdvar.h> 50 51 void pcppi_pckbd_bell __P((void *, u_int, u_int, u_int)); 52 #endif 53 54 struct pcppi_softc { 55 struct device sc_dv; 56 57 bus_space_tag_t sc_iot; 58 bus_space_handle_t sc_ppi_ioh, sc_pit1_ioh; 59 60 int sc_bellactive, sc_bellpitch; 61 int sc_slp; 62 int sc_timeout; 63 }; 64 65 int pcppi_match __P((struct device *, struct cfdata *, void *)); 66 void pcppi_attach __P((struct device *, struct device *, void *)); 67 68 struct cfattach pcppi_ca = { 69 sizeof(struct pcppi_softc), pcppi_match, pcppi_attach, 70 }; 71 72 static void pcppi_bell_stop __P((void*)); 73 74 #define PCPPIPRI (PZERO - 1) 75 76 int 77 pcppi_match(parent, match, aux) 78 struct device *parent; 79 struct cfdata *match; 80 void *aux; 81 { 82 struct isa_attach_args *ia = aux; 83 bus_space_handle_t ppi_ioh, pit1_ioh; 84 int have_pit1, have_ppi, rv; 85 u_int8_t v, nv; 86 87 /* If values are hardwired to something that they can't be, punt. */ 88 if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != IO_PPI) || 89 ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 || 90 ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) 91 return (0); 92 93 rv = 0; 94 have_pit1 = have_ppi = 0; 95 96 if (bus_space_map(ia->ia_iot, IO_TIMER1, 4, 0, &pit1_ioh)) 97 goto lose; 98 have_pit1 = 1; 99 if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh)) 100 goto lose; 101 have_ppi = 1; 102 103 /* 104 * Check for existence of PPI. Realistically, this is either going to 105 * be here or nothing is going to be here. 106 * 107 * We don't want to have any chance of changing speaker output (which 108 * this test might, if it crashes in the middle, or something; 109 * normally it's be to quick to produce anthing audible), but 110 * many "combo chip" mock-PPI's don't seem to support the top bit 111 * of Port B as a settable bit. The bottom bit has to be settable, 112 * since the speaker driver hardware still uses it. 113 */ 114 v = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 115 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */ 116 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 117 if (((nv ^ v) & 0x01) == 0x01) 118 rv = 1; 119 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */ 120 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 121 if (((nv ^ v) & 0x01) != 0x00) { 122 rv = 0; 123 goto lose; 124 } 125 126 /* 127 * We assume that the programmable interval timer is there. 128 */ 129 130 lose: 131 if (have_pit1) 132 bus_space_unmap(ia->ia_iot, pit1_ioh, 4); 133 if (have_ppi) 134 bus_space_unmap(ia->ia_iot, ppi_ioh, 1); 135 if (rv) { 136 ia->ia_iobase = IO_PPI; 137 ia->ia_iosize = 0x1; 138 ia->ia_msize = 0x0; 139 } 140 return (rv); 141 } 142 143 void 144 pcppi_attach(parent, self, aux) 145 struct device *parent, *self; 146 void *aux; 147 { 148 struct pcppi_softc *sc = (struct pcppi_softc *)self; 149 struct isa_attach_args *ia = aux; 150 bus_space_tag_t iot; 151 struct pcppi_attach_args pa; 152 153 sc->sc_iot = iot = ia->ia_iot; 154 155 if (bus_space_map(iot, IO_TIMER1, 4, 0, &sc->sc_pit1_ioh) || 156 bus_space_map(iot, IO_PPI, 1, 0, &sc->sc_ppi_ioh)) 157 panic("pcppi_attach: couldn't map"); 158 159 printf("\n"); 160 161 sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0; 162 163 #if NPCKBD > 0 164 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 165 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 166 #endif 167 168 pa.pa_cookie = sc; 169 while (config_found(self, &pa, 0)); 170 } 171 172 void 173 pcppi_bell(self, pitch, period, slp) 174 pcppi_tag_t self; 175 int pitch, period; 176 int slp; 177 { 178 struct pcppi_softc *sc = self; 179 int s1, s2; 180 181 s1 = spltty(); /* ??? */ 182 if (sc->sc_bellactive) { 183 if (sc->sc_timeout) { 184 sc->sc_timeout = 0; 185 untimeout(pcppi_bell_stop, sc); 186 } 187 if (sc->sc_slp) 188 wakeup(pcppi_bell_stop); 189 } 190 if (pitch == 0 || period == 0) { 191 pcppi_bell_stop(sc); 192 sc->sc_bellpitch = 0; 193 splx(s1); 194 return; 195 } 196 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 197 s2 = splhigh(); 198 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_MODE, 199 TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); 200 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 201 TIMER_DIV(pitch) % 256); 202 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 203 TIMER_DIV(pitch) / 256); 204 splx(s2); 205 /* enable speaker */ 206 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 207 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 208 | PIT_SPKR); 209 } 210 sc->sc_bellpitch = pitch; 211 212 sc->sc_bellactive = 1; 213 214 if (slp & PCPPI_BELL_POLL) { 215 delay((period * 1000000) / hz); 216 pcppi_bell_stop(sc); 217 } else { 218 sc->sc_timeout = 1; 219 timeout(pcppi_bell_stop, sc, period); 220 if (slp & PCPPI_BELL_SLEEP) { 221 sc->sc_slp = 1; 222 tsleep(pcppi_bell_stop, PCPPIPRI | PCATCH, "bell", 0); 223 sc->sc_slp = 0; 224 } 225 } 226 splx(s1); 227 } 228 229 static void 230 pcppi_bell_stop(arg) 231 void *arg; 232 { 233 struct pcppi_softc *sc = arg; 234 int s; 235 236 s = spltty(); /* ??? */ 237 sc->sc_timeout = 0; 238 239 /* disable bell */ 240 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 241 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 242 & ~PIT_SPKR); 243 sc->sc_bellactive = 0; 244 if (sc->sc_slp) 245 wakeup(pcppi_bell_stop); 246 splx(s); 247 } 248 249 #if NPCKBD > 0 250 void 251 pcppi_pckbd_bell(arg, pitch, period, volume) 252 void *arg; 253 u_int pitch, period, volume; 254 { 255 256 /* 257 * Comes in as ms, goes out at ticks; volume ignored. 258 */ 259 pcppi_bell(arg, pitch, (period * hz) / 1000, PCPPI_BELL_POLL); 260 } 261 #endif /* NPCKBD > 0 */ 262
Indexes created Fri Oct 03 02:09:57 GMT 2025