pcppi.c revision 1.14
1 /* $NetBSD: pcppi.c,v 1.14 2005/03/21 10:51:52 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 1.14 2005/03/21 10:51:52 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 struct pcppi_softc { 58 struct device sc_dv; 59 60 bus_space_tag_t sc_iot; 61 bus_space_handle_t sc_ppi_ioh, sc_pit1_ioh; 62 63 struct callout sc_bell_ch; 64 65 int sc_bellactive, sc_bellpitch; 66 int sc_slp; 67 int sc_timeout; 68 }; 69 70 int pcppi_match(struct device *, struct cfdata *, void *); 71 void pcppi_attach(struct device *, struct device *, void *); 72 73 CFATTACH_DECL(pcppi, sizeof(struct pcppi_softc), 74 pcppi_match, pcppi_attach, NULL, NULL); 75 76 static void pcppi_bell_stop(void*); 77 78 #define PCPPIPRI (PZERO - 1) 79 80 int 81 pcppi_match(struct device *parent, struct cfdata *match, void *aux) 82 { 83 struct isa_attach_args *ia = aux; 84 bus_space_handle_t ppi_ioh, pit1_ioh; 85 int have_pit1, have_ppi, rv; 86 u_int8_t v, nv; 87 88 if (ISA_DIRECT_CONFIG(ia)) 89 return (0); 90 91 /* If values are hardwired to something that they can't be, punt. */ 92 if (ia->ia_nio < 1 || 93 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 94 ia->ia_io[0].ir_addr != IO_PPI)) 95 return (0); 96 97 if (ia->ia_niomem > 0 && 98 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 99 return (0); 100 101 if (ia->ia_nirq > 0 && 102 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 103 return (0); 104 105 if (ia->ia_ndrq > 0 && 106 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 107 return (0); 108 109 rv = 0; 110 have_pit1 = have_ppi = 0; 111 112 if (bus_space_map(ia->ia_iot, IO_TIMER1, 4, 0, &pit1_ioh)) 113 goto lose; 114 have_pit1 = 1; 115 if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh)) 116 goto lose; 117 have_ppi = 1; 118 119 /* 120 * Check for existence of PPI. Realistically, this is either going to 121 * be here or nothing is going to be here. 122 * 123 * We don't want to have any chance of changing speaker output (which 124 * this test might, if it crashes in the middle, or something; 125 * normally it's be to quick to produce anthing audible), but 126 * many "combo chip" mock-PPI's don't seem to support the top bit 127 * of Port B as a settable bit. The bottom bit has to be settable, 128 * since the speaker driver hardware still uses it. 129 */ 130 v = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 131 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */ 132 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 133 if (((nv ^ v) & 0x01) == 0x01) 134 rv = 1; 135 bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */ 136 nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */ 137 if (((nv ^ v) & 0x01) != 0x00) { 138 rv = 0; 139 goto lose; 140 } 141 142 /* 143 * We assume that the programmable interval timer is there. 144 */ 145 146 lose: 147 if (have_pit1) 148 bus_space_unmap(ia->ia_iot, pit1_ioh, 4); 149 if (have_ppi) 150 bus_space_unmap(ia->ia_iot, ppi_ioh, 1); 151 if (rv) { 152 ia->ia_io[0].ir_addr = IO_PPI; 153 ia->ia_io[0].ir_size = 1; 154 ia->ia_nio = 1; 155 156 ia->ia_niomem = 0; 157 ia->ia_nirq = 0; 158 ia->ia_ndrq = 0; 159 } 160 return (rv); 161 } 162 163 void 164 pcppi_attach(struct device *parent, struct device *self, void *aux) 165 { 166 struct pcppi_softc *sc = (struct pcppi_softc *)self; 167 struct isa_attach_args *ia = aux; 168 bus_space_tag_t iot; 169 struct pcppi_attach_args pa; 170 171 callout_init(&sc->sc_bell_ch); 172 173 sc->sc_iot = iot = ia->ia_iot; 174 175 if (bus_space_map(iot, IO_TIMER1, 4, 0, &sc->sc_pit1_ioh) || 176 bus_space_map(iot, IO_PPI, 1, 0, &sc->sc_ppi_ioh)) 177 panic("pcppi_attach: couldn't map"); 178 179 printf("\n"); 180 181 sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0; 182 183 #if NPCKBD > 0 184 /* Provide a beeper for the PC Keyboard, if there isn't one already. */ 185 pckbd_hookup_bell(pcppi_pckbd_bell, sc); 186 #endif 187 188 pa.pa_cookie = sc; 189 while (config_found(self, &pa, 0)); 190 } 191 192 void 193 pcppi_bell(pcppi_tag_t self, int pitch, int period, int slp) 194 { 195 struct pcppi_softc *sc = self; 196 int s1, s2; 197 198 s1 = spltty(); /* ??? */ 199 if (sc->sc_bellactive) { 200 if (sc->sc_timeout) { 201 sc->sc_timeout = 0; 202 callout_stop(&sc->sc_bell_ch); 203 } 204 if (sc->sc_slp) 205 wakeup(pcppi_bell_stop); 206 } 207 if (pitch == 0 || period == 0) { 208 pcppi_bell_stop(sc); 209 sc->sc_bellpitch = 0; 210 splx(s1); 211 return; 212 } 213 if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) { 214 s2 = splhigh(); 215 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_MODE, 216 TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); 217 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 218 TIMER_DIV(pitch) % 256); 219 bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2, 220 TIMER_DIV(pitch) / 256); 221 splx(s2); 222 /* enable speaker */ 223 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 224 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 225 | PIT_SPKR); 226 } 227 sc->sc_bellpitch = pitch; 228 229 sc->sc_bellactive = 1; 230 if (slp & PCPPI_BELL_POLL) { 231 delay((period * 1000000) / hz); 232 pcppi_bell_stop(sc); 233 } else { 234 sc->sc_timeout = 1; 235 callout_reset(&sc->sc_bell_ch, period, pcppi_bell_stop, sc); 236 if (slp & PCPPI_BELL_SLEEP) { 237 sc->sc_slp = 1; 238 tsleep(pcppi_bell_stop, PCPPIPRI | PCATCH, "bell", 0); 239 sc->sc_slp = 0; 240 } 241 } 242 splx(s1); 243 } 244 245 static void 246 pcppi_bell_stop(void *arg) 247 { 248 struct pcppi_softc *sc = arg; 249 int s; 250 251 s = spltty(); /* ??? */ 252 sc->sc_timeout = 0; 253 254 /* disable bell */ 255 bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0, 256 bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0) 257 & ~PIT_SPKR); 258 sc->sc_bellactive = 0; 259 if (sc->sc_slp) 260 wakeup(pcppi_bell_stop); 261 splx(s); 262 } 263 264 #if NPCKBD > 0 265 void 266 pcppi_pckbd_bell(void *arg, u_int pitch, u_int period, u_int volume, int poll) 267 { 268 269 /* 270 * Comes in as ms, goes out at ticks; volume ignored. 271 */ 272 pcppi_bell(arg, pitch, (period * hz) / 1000, 273 poll ? PCPPI_BELL_POLL : 0); 274 } 275 #endif /* NPCKBD > 0 */ 276
Indexes created Fri Oct 03 02:09:57 GMT 2025