pcppi.c revision 1.4
1 /* $NetBSD: pcppi.c,v 1.4 2000/03/23 07:01:35 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/callout.h> 33 #include <sys/kernel.h> 34 #include <sys/proc.h> 35 #include <sys/device.h> 36 #include <sys/errno.h> 37 38 #include <machine/bus.h> 39 40 #include <dev/isa/isareg.h> 41 #include <dev/isa/isavar.h> 42 #include <dev/isa/pcppireg.h> 43 #include <dev/isa/pcppivar.h> 44 45 #include <dev/ic/i8253reg.h> 46 47 #include "pckbd.h" 48 #if NPCKBD > 0 49 #include <dev/ic/pckbcvar.h> 50 #include <dev/pckbc/pckbdvar.h> 51 52 void pcppi_pckbd_bell __P((void *, u_int, u_int, u_int, int)); 53 #endif 54 55 struct pcppi_softc { 56 struct device sc_dv; 57 58 bus_space_tag_t sc_iot; 59 bus_space_handle_t sc_ppi_ioh, sc_pit1_ioh; 60 61 struct callout sc_bell_ch; 62 63 int sc_bellactive, sc_bellpitch; 64 int sc_slp; 65 int sc_timeout; 66 }; 67 68 int pcppi_match __P((struct device *, struct cfdata *, void *)); 69 void pcppi_attach __P((struct device *, struct device *, void *)); 70 71 struct cfattach pcppi_ca = { 72 sizeof(struct pcppi_softc), pcppi_match, pcppi_attach, 73 }; 74 75 static void pcppi_bell_stop __P((void*)); 76 77 #define PCPPIPRI (PZERO - 1) 78 79 int 80 pcppi_match(parent, match, aux) 81 struct device *parent; 82 struct cfdata *match; 83 void *aux; 84 { 85 struct isa_attach_args *ia = aux; 86 bus_space_handle_t ppi_ioh, pit1_ioh; 87 int have_pit1, have_ppi, rv; 88 u_int8_t v, nv; 89 90 /* If values are hardwired to something that they can't be, punt. */ 91 if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != IO_PPI) || 92 ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 || 93 ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) 94 return (0); 95 96 rv = 0; 97 have_pit1 = have_ppi = 0; 98 99 if (bus_space_map(ia->ia_iot, IO_TIMER1, 4, 0, &pit1_ioh)) 100 goto lose; 101 have_pit1 = 1; 102 if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh)) 103 goto lose; 104 have_ppi = 1; 105 106 /* 107 * Check for existence of PPI. Realistically, this is either going to 108 * be here or nothing is going to be here. 109 * 110 * We don't want to have any chance of changing speaker output (which 111 * this test might, if it crashes in the middle, or something; 112 * normally it's be to quick to produce anthing audible), but 113 * many "combo chip" mock-PPI's don't seem to support the top bit 114 * of Port B as a settable bit. The bottom bit has to be settable, 115 * since the speaker driver hardware still uses it. 116 */ 117 v = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 118 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */ 119 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 120 if (((nv ^ v) & 0x01) == 0x01) 121 rv = 1; 122 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */ 123 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 124 if (((nv ^ v) & 0x01) != 0x00) { 125 rv = 0; 126 goto lose; 127 } 128 129 /* 130 * We assume that the programmable interval timer is there. 131 */ 132 133 lose: 134 if (have_pit1) 135 bus_space_unmap(ia->ia_iot, pit1_ioh, 4); 136 if (have_ppi) 137 bus_space_unmap(ia->ia_iot, ppi_ioh, 1); 138 if (rv) { 139 ia->ia_iobase = IO_PPI; 140 ia->ia_iosize = 0x1; 141 ia->ia_msize = 0x0; 142 } 143 return (rv); 144 } 145 146 void 147 pcppi_attach(parent, self, aux) 148 struct device *parent, *self; 149 void *aux; 150 { 151 struct pcppi_softc *sc = (struct pcppi_softc *)self; 152 struct isa_attach_args *ia = aux; 153 bus_space_tag_t iot; 154 struct pcppi_attach_args pa; 155 156 callout_init(&sc->sc_bell_ch); 157 158 sc->sc_iot = iot = ia->ia_iot; 159 160 if (bus_space_map(iot, IO_TIMER1, 4, 0, &sc->sc_pit1_ioh) || 161 bus_space_map(iot, IO_PPI, 1, 0, &sc->sc_ppi_ioh)) 162 panic("pcppi_attach: couldn't map"); 163 164 printf("\n"); 165 166 sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0; 167 168 #if NPCKBD > 0 169 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 170 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 171 #endif 172 173 pa.pa_cookie = sc; 174 while (config_found(self, &pa, 0)); 175 } 176 177 void 178 pcppi_bell(self, pitch, period, slp) 179 pcppi_tag_t self; 180 int pitch, period; 181 int slp; 182 { 183 struct pcppi_softc *sc = self; 184 int s1, s2; 185 186 s1 = spltty(); /* ??? */ 187 if (sc->sc_bellactive) { 188 if (sc->sc_timeout) { 189 sc->sc_timeout = 0; 190 callout_stop(&sc->sc_bell_ch); 191 } 192 if (sc->sc_slp) 193 wakeup(pcppi_bell_stop); 194 } 195 if (pitch == 0 || period == 0) { 196 pcppi_bell_stop(sc); 197 sc->sc_bellpitch = 0; 198 splx(s1); 199 return; 200 } 201 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 202 s2 = splhigh(); 203 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_MODE, 204 TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); 205 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 206 TIMER_DIV(pitch) % 256); 207 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 208 TIMER_DIV(pitch) / 256); 209 splx(s2); 210 /* enable speaker */ 211 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 212 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 213 | PIT_SPKR); 214 } 215 sc->sc_bellpitch = pitch; 216 217 sc->sc_bellactive = 1; 218 if (slp & PCPPI_BELL_POLL) { 219 delay((period * 1000000) / hz); 220 pcppi_bell_stop(sc); 221 } else { 222 sc->sc_timeout = 1; 223 callout_reset(&sc->sc_bell_ch, period, pcppi_bell_stop, sc); 224 if (slp & PCPPI_BELL_SLEEP) { 225 sc->sc_slp = 1; 226 tsleep(pcppi_bell_stop, PCPPIPRI | PCATCH, "bell", 0); 227 sc->sc_slp = 0; 228 } 229 } 230 splx(s1); 231 } 232 233 static void 234 pcppi_bell_stop(arg) 235 void *arg; 236 { 237 struct pcppi_softc *sc = arg; 238 int s; 239 240 s = spltty(); /* ??? */ 241 sc->sc_timeout = 0; 242 243 /* disable bell */ 244 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 245 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 246 & ~PIT_SPKR); 247 sc->sc_bellactive = 0; 248 if (sc->sc_slp) 249 wakeup(pcppi_bell_stop); 250 splx(s); 251 } 252 253 #if NPCKBD > 0 254 void 255 pcppi_pckbd_bell(arg, pitch, period, volume, poll) 256 void *arg; 257 u_int pitch, period, volume; 258 int poll; 259 { 260 261 /* 262 * Comes in as ms, goes out at ticks; volume ignored. 263 */ 264 pcppi_bell(arg, pitch, (period * hz) / 1000, 265 poll ? PCPPI_BELL_POLL : 0); 266 } 267 #endif /* NPCKBD > 0 */ 268
Indexes created Fri Oct 03 02:09:57 GMT 2025