pcppi.c revision 1.15
1 /* $NetBSD: pcppi.c,v 1.15 2005/03/21 14:05:18 xtraeme 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 1.15 2005/03/21 14:05:18 xtraeme Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/callout.h> 36 #include <sys/kernel.h> 37 #include <sys/proc.h> 38 #include <sys/device.h> 39 #include <sys/errno.h> 40 41 #include <machine/bus.h> 42 43 #include <dev/isa/isareg.h> 44 #include <dev/isa/isavar.h> 45 #include <dev/isa/pcppireg.h> 46 #include <dev/isa/pcppivar.h> 47 48 #include <dev/ic/i8253reg.h> 49 50 #include "pckbd.h" 51 #if NPCKBD > 0 52 #include <dev/pckbport/pckbdvar.h> 53 54 void pcppi_pckbd_bell(void *, u_int, u_int, u_int, int); 55 #endif 56 57 int pcppi_match(struct device *, struct cfdata *, void *); 58 void pcppi_isa_attach(struct device *, struct device *, void *); 59 60 CFATTACH_DECL(pcppi, sizeof(struct pcppi_softc), 61 pcppi_match, pcppi_isa_attach, NULL, NULL); 62 63 static void pcppi_bell_stop(void*); 64 65 #define PCPPIPRI (PZERO - 1) 66 67 int 68 pcppi_match(struct device *parent, struct cfdata *match, void *aux) 69 { 70 struct isa_attach_args *ia = aux; 71 bus_space_handle_t ppi_ioh, pit1_ioh; 72 int have_pit1, have_ppi, rv; 73 u_int8_t v, nv; 74 75 if (ISA_DIRECT_CONFIG(ia)) 76 return (0); 77 78 /* If values are hardwired to something that they can't be, punt. */ 79 if (ia->ia_nio < 1 || 80 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 81 ia->ia_io[0].ir_addr != IO_PPI)) 82 return (0); 83 84 if (ia->ia_niomem > 0 && 85 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 86 return (0); 87 88 if (ia->ia_nirq > 0 && 89 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 90 return (0); 91 92 if (ia->ia_ndrq > 0 && 93 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 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_io[0].ir_addr = IO_PPI; 140 ia->ia_io[0].ir_size = 1; 141 ia->ia_nio = 1; 142 143 ia->ia_niomem = 0; 144 ia->ia_nirq = 0; 145 ia->ia_ndrq = 0; 146 } 147 return (rv); 148 } 149 150 void 151 pcppi_isa_attach(struct device *parent, struct device *self, void *aux) 152 { 153 struct pcppi_softc *sc = (struct pcppi_softc *)self; 154 struct isa_attach_args *ia = aux; 155 bus_space_tag_t iot; 156 157 sc->sc_iot = iot = ia->ia_iot; 158 159 if (bus_space_map(iot, IO_TIMER1, 4, 0, &sc->sc_pit1_ioh) || 160 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 181 182 pa.pa_cookie = sc; 183 while (config_found((struct device *)sc, &pa, 0)); 184 } 185 186 void 187 pcppi_bell(pcppi_tag_t self, int pitch, int period, int slp) 188 { 189 struct pcppi_softc *sc = self; 190 int s1, s2; 191 192 s1 = spltty(); /* ??? */ 193 if (sc->sc_bellactive) { 194 if (sc->sc_timeout) { 195 sc->sc_timeout = 0; 196 callout_stop(&sc->sc_bell_ch); 197 } 198 if (sc->sc_slp) 199 wakeup(pcppi_bell_stop); 200 } 201 if (pitch == 0 || period == 0) { 202 pcppi_bell_stop(sc); 203 sc->sc_bellpitch = 0; 204 splx(s1); 205 return; 206 } 207 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 208 s2 = splhigh(); 209 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_MODE, 210 TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); 211 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 212 TIMER_DIV(pitch) % 256); 213 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 214 TIMER_DIV(pitch) / 256); 215 splx(s2); 216 /* enable speaker */ 217 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 218 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 219 | PIT_SPKR); 220 } 221 sc->sc_bellpitch = pitch; 222 223 sc->sc_bellactive = 1; 224 if (slp & PCPPI_BELL_POLL) { 225 delay((period * 1000000) / hz); 226 pcppi_bell_stop(sc); 227 } else { 228 sc->sc_timeout = 1; 229 callout_reset(&sc->sc_bell_ch, period, pcppi_bell_stop, sc); 230 if (slp & PCPPI_BELL_SLEEP) { 231 sc->sc_slp = 1; 232 tsleep(pcppi_bell_stop, PCPPIPRI | PCATCH, "bell", 0); 233 sc->sc_slp = 0; 234 } 235 } 236 splx(s1); 237 } 238 239 static void 240 pcppi_bell_stop(void *arg) 241 { 242 struct pcppi_softc *sc = arg; 243 int s; 244 245 s = spltty(); /* ??? */ 246 sc->sc_timeout = 0; 247 248 /* disable bell */ 249 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 250 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 251 & ~PIT_SPKR); 252 sc->sc_bellactive = 0; 253 if (sc->sc_slp) 254 wakeup(pcppi_bell_stop); 255 splx(s); 256 } 257 258 #if NPCKBD > 0 259 void 260 pcppi_pckbd_bell(void *arg, u_int pitch, u_int period, u_int volume, int poll) 261 { 262 263 /* 264 * Comes in as ms, goes out at ticks; volume ignored. 265 */ 266 pcppi_bell(arg, pitch, (period * hz) / 1000, 267 poll ? PCPPI_BELL_POLL : 0); 268 } 269 #endif /* NPCKBD > 0 */ 270
Indexes created Thu Oct 02 14:10:14 GMT 2025