isa.c revision 1.28.2.22
1 1.1 cgd /*- 2 1.28.2.7 mycroft * Copyright (c) 1993 Charles Hannum. 3 1.1 cgd * Copyright (c) 1991 The Regents of the University of California. 4 1.1 cgd * All rights reserved. 5 1.1 cgd * 6 1.1 cgd * This code is derived from software contributed to Berkeley by 7 1.1 cgd * William Jolitz. 8 1.1 cgd * 9 1.1 cgd * Redistribution and use in source and binary forms, with or without 10 1.1 cgd * modification, are permitted provided that the following conditions 11 1.1 cgd * are met: 12 1.1 cgd * 1. Redistributions of source code must retain the above copyright 13 1.1 cgd * notice, this list of conditions and the following disclaimer. 14 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 15 1.1 cgd * notice, this list of conditions and the following disclaimer in the 16 1.1 cgd * documentation and/or other materials provided with the distribution. 17 1.1 cgd * 3. All advertising materials mentioning features or use of this software 18 1.1 cgd * must display the following acknowledgement: 19 1.1 cgd * This product includes software developed by the University of 20 1.1 cgd * California, Berkeley and its contributors. 21 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 22 1.1 cgd * may be used to endorse or promote products derived from this software 23 1.1 cgd * without specific prior written permission. 24 1.1 cgd * 25 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 1.1 cgd * SUCH DAMAGE. 36 1.1 cgd * 37 1.13 cgd * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 38 1.28.2.22 mycroft * $Id: isa.c,v 1.28.2.22 1993/12/01 00:55:47 mycroft Exp $ 39 1.1 cgd */ 40 1.1 cgd 41 1.1 cgd /* 42 1.1 cgd * code to manage AT bus 43 1.1 cgd */ 44 1.1 cgd 45 1.28.2.15 mycroft #include <sys/param.h> 46 1.28.2.15 mycroft #include <sys/systm.h> 47 1.28.2.15 mycroft #include <sys/conf.h> 48 1.28.2.15 mycroft #include <sys/file.h> 49 1.28.2.15 mycroft #include <sys/device.h> 50 1.28.2.15 mycroft 51 1.28.2.15 mycroft #include <machine/cpu.h> 52 1.28.2.15 mycroft #include <machine/pio.h> 53 1.28.2.15 mycroft 54 1.28.2.15 mycroft #include <i386/isa/isa.h> 55 1.28.2.15 mycroft #include <i386/isa/isavar.h> 56 1.28.2.15 mycroft #include <i386/isa/icu.h> 57 1.28.2.15 mycroft #include <i386/isa/timerreg.h> 58 1.28.2.15 mycroft #include <i386/isa/spkr_reg.h> 59 1.14 deraadt 60 1.28.2.1 mycroft isa_type isa_bustype; /* type of bus */ 61 1.1 cgd 62 1.28.2.1 mycroft static int isaprobe __P((struct device *, struct cfdata *, void *)); 63 1.28.2.2 mycroft static void isaattach __P((struct device *, struct device *, void *)); 64 1.28.2.2 mycroft static int isasubmatch __P((struct device *, struct cfdata *, void *)); 65 1.28.2.1 mycroft 66 1.28.2.1 mycroft struct cfdriver isacd = 67 1.28.2.2 mycroft { NULL, "isa", isaprobe, isaattach, DV_DULL, sizeof(struct isa_softc) }; 68 1.28.2.1 mycroft 69 1.28.2.2 mycroft static int isaprint __P((void *, char *)); 70 1.28.2.17 mycroft void isa_defaultirq __P((void)); 71 1.28.2.17 mycroft void isa_flushintrs __P((void)); 72 1.28.2.17 mycroft void isa_intrmaskwickedness __P((void)); 73 1.28.2.2 mycroft 74 1.28.2.2 mycroft /* 75 1.28.2.2 mycroft * We think there might be an ISA bus here. Check it out. 76 1.28.2.2 mycroft */ 77 1.28.2.2 mycroft static int 78 1.28.2.1 mycroft isaprobe(parent, cf, aux) 79 1.28.2.1 mycroft struct device *parent; 80 1.28.2.1 mycroft struct cfdata *cf; 81 1.28.2.1 mycroft void *aux; 82 1.28.2.1 mycroft { 83 1.28.2.1 mycroft 84 1.28.2.1 mycroft /* XXX should do a real probe */ 85 1.28.2.1 mycroft isa_bustype = BUS_ISA; 86 1.28.2.1 mycroft return 1; 87 1.28.2.1 mycroft } 88 1.28.2.1 mycroft 89 1.28.2.2 mycroft /* 90 1.28.2.2 mycroft * Probe succeeded, someone called config_attach. Now we have to 91 1.28.2.2 mycroft * probe the ISA bus itself in our turn. 92 1.28.2.2 mycroft */ 93 1.28.2.2 mycroft static void 94 1.28.2.2 mycroft isaattach(parent, self, aux) 95 1.28.2.2 mycroft struct device *parent, *self; 96 1.28.2.2 mycroft void *aux; 97 1.28.2.2 mycroft { 98 1.28.2.2 mycroft 99 1.28.2.7 mycroft /* XXX should print ISA/EISA & bus clock frequency and anything else 100 1.28.2.2 mycroft we can figure out? */ 101 1.28.2.2 mycroft printf("\n"); 102 1.28.2.2 mycroft 103 1.28.2.2 mycroft isa_defaultirq(); 104 1.28.2.2 mycroft 105 1.28.2.2 mycroft /* Iterate ``isasubmatch'' over all devices configured here. */ 106 1.28.2.2 mycroft (void)config_search(isasubmatch, self, (void *)NULL); 107 1.28.2.2 mycroft 108 1.28.2.12 mycroft isa_intrmaskwickedness(); 109 1.28.2.9 mycroft isa_flushintrs(); 110 1.28.2.2 mycroft } 111 1.28.2.2 mycroft 112 1.28.2.2 mycroft /* 113 1.28.2.2 mycroft * isaattach (above) iterates this function over all the sub-devices that 114 1.28.2.2 mycroft * were configured at the ``isa'' device. Our job is to provide defaults 115 1.28.2.2 mycroft * and do some internal/external representation conversion (some of which 116 1.28.2.2 mycroft * is scheduled to get cleaned up later), then call the device's probe 117 1.28.2.2 mycroft * function. If this says the device is there, we try to reserve ISA 118 1.28.2.2 mycroft * bus memory and ports for the device, and attach it. 119 1.28.2.2 mycroft * 120 1.28.2.2 mycroft * Note that we always return 0, but our ultimate caller (isaattach) 121 1.28.2.2 mycroft * does not care that we never `match' anything. (In fact, our return 122 1.28.2.2 mycroft * value is entirely irrelevant; this function is run entirely for its 123 1.28.2.2 mycroft * side effects.) 124 1.28.2.2 mycroft */ 125 1.28.2.1 mycroft static int 126 1.28.2.2 mycroft isasubmatch(isa, cf, aux) 127 1.28.2.2 mycroft struct device *isa; 128 1.28.2.1 mycroft struct cfdata *cf; 129 1.28.2.1 mycroft void *aux; 130 1.28.2.1 mycroft { 131 1.28.2.2 mycroft struct isa_attach_args ia; 132 1.28.2.1 mycroft 133 1.28.2.1 mycroft #ifdef DIAGNOSTIC 134 1.28.2.2 mycroft if (cf->cf_driver->cd_match == NULL) { 135 1.28.2.21 mycroft panic("isasubmatch: no match function for `%s' device\n", 136 1.28.2.21 mycroft cf->cf_driver->cd_name); 137 1.28.2.1 mycroft } 138 1.28.2.1 mycroft #endif 139 1.28.2.1 mycroft 140 1.28.2.12 mycroft /* Init the info needed in the device probe and attach routines. */ 141 1.28.2.2 mycroft ia.ia_iobase = cf->cf_iobase; 142 1.28.2.2 mycroft ia.ia_iosize = cf->cf_iosize; 143 1.28.2.2 mycroft if (cf->cf_irq == -1) 144 1.28.2.2 mycroft ia.ia_irq = IRQUNK; 145 1.28.2.2 mycroft else 146 1.28.2.2 mycroft ia.ia_irq = 1 << cf->cf_irq; 147 1.28.2.2 mycroft ia.ia_drq = cf->cf_drq; 148 1.28.2.2 mycroft ia.ia_maddr = (caddr_t)cf->cf_maddr; 149 1.28.2.2 mycroft ia.ia_msize = cf->cf_msize; 150 1.28.2.1 mycroft 151 1.28.2.2 mycroft /* If driver says it's not there, believe it. */ 152 1.28.2.2 mycroft if (!cf->cf_driver->cd_match(isa, cf, &ia)) 153 1.28.2.1 mycroft return 0; 154 1.28.2.1 mycroft 155 1.28.2.12 mycroft /* Check for port or shared memory conflicts. */ 156 1.28.2.12 mycroft if (ia.ia_iosize && !isa_portcheck(ia.ia_iobase, ia.ia_iosize)) 157 1.28.2.12 mycroft return 0; 158 1.28.2.12 mycroft if (ia.ia_msize && !isa_memcheck(ia.ia_maddr, ia.ia_msize)) 159 1.28.2.12 mycroft return 0; 160 1.28.2.12 mycroft 161 1.28.2.12 mycroft /* Reserve I/O ports and/or shared memory. */ 162 1.28.2.12 mycroft if (ia.ia_iosize) 163 1.28.2.11 mycroft isa_portalloc(ia.ia_iobase, ia.ia_iosize); 164 1.28.2.12 mycroft if (ia.ia_msize) 165 1.28.2.12 mycroft isa_memalloc(ia.ia_maddr, ia.ia_msize); 166 1.28.2.12 mycroft 167 1.28.2.12 mycroft /* Configure device. */ 168 1.28.2.12 mycroft config_attach(isa, cf, &ia, isaprint); 169 1.28.2.1 mycroft 170 1.28.2.2 mycroft return 0; 171 1.28.2.14 mycroft } 172 1.28.2.14 mycroft 173 1.28.2.14 mycroft /* 174 1.28.2.14 mycroft * XXX It's not clear to me why this is useful. 175 1.28.2.14 mycroft */ 176 1.28.2.14 mycroft void 177 1.28.2.14 mycroft isa_establish(id, dv) 178 1.28.2.14 mycroft struct isadev *id; 179 1.28.2.14 mycroft struct device *dv; 180 1.28.2.14 mycroft { 181 1.28.2.14 mycroft struct isa_softc *idv = (struct isa_softc *)dv->dv_parent; 182 1.28.2.14 mycroft id->id_dev = dv; 183 1.28.2.14 mycroft id->id_bchain = idv->sc_isadev; 184 1.28.2.14 mycroft idv->sc_isadev = id; 185 1.28.2.1 mycroft } 186 1.28.2.1 mycroft 187 1.28.2.2 mycroft /* 188 1.28.2.2 mycroft * Called indirectly via config_attach (see above). Config has already 189 1.28.2.2 mycroft * printed, e.g., "wdc0 at isa0". We can ignore our ``isaname'' arg 190 1.28.2.2 mycroft * (it is always NULL, by definition) and just extend the line with 191 1.28.2.2 mycroft * the standard info (port(s), irq, drq, and iomem). 192 1.28.2.2 mycroft */ 193 1.28.2.2 mycroft static int 194 1.28.2.1 mycroft isaprint(aux, isaname) 195 1.28.2.1 mycroft void *aux; 196 1.28.2.1 mycroft char *isaname; 197 1.28.2.1 mycroft { 198 1.28.2.1 mycroft struct isa_attach_args *ia = aux; 199 1.28.2.1 mycroft 200 1.28.2.1 mycroft if (ia->ia_iosize) 201 1.28.2.1 mycroft printf(" port 0x%x", ia->ia_iobase); 202 1.28.2.1 mycroft if (ia->ia_iosize > 1) 203 1.28.2.1 mycroft printf("-0x%x", ia->ia_iobase + ia->ia_iosize - 1); 204 1.28.2.12 mycroft if (ia->ia_msize) 205 1.28.2.12 mycroft printf(" iomem 0x%x", ia->ia_maddr); 206 1.28.2.12 mycroft if (ia->ia_msize > 1) 207 1.28.2.12 mycroft printf("-0x%x", ia->ia_maddr + ia->ia_msize - 1); 208 1.28.2.3 mycroft #ifdef DIAGNOSTIC 209 1.28.2.3 mycroft if (ia->ia_irq == IRQUNK) 210 1.28.2.4 mycroft printf(" THIS IS A BUG ->"); 211 1.28.2.3 mycroft #endif 212 1.28.2.3 mycroft if (ia->ia_irq != IRQNONE) 213 1.28.2.1 mycroft printf(" irq %d", ffs(ia->ia_irq) - 1); 214 1.28.2.1 mycroft if (ia->ia_drq != DRQUNK) 215 1.28.2.1 mycroft printf(" drq %d", ia->ia_drq); 216 1.28.2.7 mycroft /* XXXX print flags */ 217 1.28.2.2 mycroft return QUIET; /* actually, our return value is irrelevant. */ 218 1.1 cgd } 219 1.1 cgd 220 1.28.2.13 mycroft /* 221 1.28.2.12 mycroft int isa_portcheck __P((u_int, u_int)); 222 1.28.2.12 mycroft int isa_memcheck __P((u_int, u_int)); 223 1.28.2.12 mycroft void isa_portalloc __P((u_int, u_int)); 224 1.28.2.12 mycroft void isa_memalloc __P((u_int, u_int)); 225 1.28.2.13 mycroft */ 226 1.1 cgd 227 1.28.2.7 mycroft static int beeping; 228 1.28.2.7 mycroft 229 1.21 andrew static void 230 1.28.2.22 mycroft sysbeepstop(arg) 231 1.28.2.22 mycroft caddr_t arg; 232 1.1 cgd { 233 1.16 mycroft 234 1.1 cgd /* disable counter 2 */ 235 1.16 mycroft disable_intr(); 236 1.28 brezak outb(PITAUX_PORT, inb(PITAUX_PORT) & ~PIT_SPKR); 237 1.16 mycroft enable_intr(); 238 1.28.2.22 mycroft beeping = 0; 239 1.1 cgd } 240 1.1 cgd 241 1.21 andrew void 242 1.21 andrew sysbeep(int pitch, int period) 243 1.1 cgd { 244 1.16 mycroft static int last_pitch, last_period; 245 1.1 cgd 246 1.28.2.22 mycroft if (beeping) 247 1.28.2.22 mycroft untimeout(sysbeepstop, (caddr_t)0); 248 1.16 mycroft if (!beeping || last_pitch != pitch) { 249 1.16 mycroft /* 250 1.28.2.7 mycroft * XXX - move timer stuff to clock.c. 251 1.28.2.7 mycroft */ 252 1.16 mycroft disable_intr(); 253 1.16 mycroft outb(TIMER_MODE, TIMER_SEL2|TIMER_16BIT|TIMER_SQWAVE); 254 1.28.2.7 mycroft outb(TIMER_CNTR2, TIMER_DIV(pitch)); 255 1.28.2.7 mycroft outb(TIMER_CNTR2, TIMER_DIV(pitch)>>8); 256 1.28 brezak outb(PITAUX_PORT, inb(PITAUX_PORT) | PIT_SPKR); /* enable counter 2 */ 257 1.16 mycroft enable_intr(); 258 1.16 mycroft } 259 1.16 mycroft last_pitch = pitch; 260 1.16 mycroft beeping = last_period = period; 261 1.28.2.22 mycroft timeout(sysbeepstop, (caddr_t)0, period); 262 1.1 cgd } 263
Indexes created Thu Oct 02 01:09:59 GMT 2025