sableio.c revision 1.2
1 /* $NetBSD: sableio.c,v 1.2 2002/09/27 02:24:09 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Driver glue for the Sable STDIO module. 41 * 42 * This is kind of a hack. The STDIO is really a junk I/O module with 43 * your regular ISA junk peripherals and their regular ISA I/O addresses. 44 * However, the main issue we have here is *interrupts*. Not only are 45 * devices IRQs strange (i.e. not what you would expect to find if they 46 * were attached to a real ISA) IRQs, the keyboard controller isn't even 47 * connected to the (E)ISA IRQ space at all! 48 * 49 * In short, we're gluing together the following things: 50 * 51 * - Standard ISA junk I/O chip 52 * - ISA DMA 53 * - Pre-mapped "PCI" interrupts that are *edge triggered* 54 */ 55 56 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 57 58 __KERNEL_RCSID(0, "$NetBSD: sableio.c,v 1.2 2002/09/27 02:24:09 thorpej Exp $"); 59 60 #include "isadma.h" 61 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/device.h> 65 66 #include <dev/isa/isareg.h> 67 #include <dev/isa/isavar.h> 68 #include <dev/isa/isadmavar.h> 69 70 #include <dev/pci/pcivar.h> 71 72 #include <alpha/sableio/sableiovar.h> 73 74 /* 75 * The devices built-in to the Sable STDIO module. 76 */ 77 const struct sableio_dev { 78 const char *sd_name; /* device name */ 79 bus_addr_t sd_ioaddr; /* I/O space address */ 80 int sd_sableirq[2]; /* Sable IRQs */ 81 int sd_drq; /* ISA DRQ */ 82 } sableio_devs[] = { 83 /* 84 * See alpha/pci/pci_2100_a500.c for interrupt information. 85 */ 86 { "pckbc", IO_KBD, { 6, 3 }, -1 }, 87 { "fdc", IO_FD1, { 7, -1 }, 2 }, 88 { "com", IO_COM1, { 15, -1 }, -1 }, 89 { "com", IO_COM2, { 8, -1 }, -1 }, 90 { "lpt", IO_LPT3, { 9, -1 }, -1 }, 91 { NULL, 0, { -1, -1 }, -1 }, 92 }; 93 94 struct sableio_softc { 95 struct device sc_dev; /* base device */ 96 97 /* 98 * We have to deal with ISA DMA, so that means we have to 99 * hold the ISA chipset, since we attach STDIO devices 100 * before we attach the PCI (and thus EISA) bus. 101 */ 102 struct alpha_isa_chipset sc_isa_chipset; 103 }; 104 105 int sableio_match(struct device *, struct cfdata *, void *); 106 void sableio_attach(struct device *, struct device *, void *); 107 108 struct cfattach sableio_ca = { 109 sizeof(struct sableio_softc), sableio_match, sableio_attach 110 }; 111 112 int sableio_print(void *, const char *); 113 int sableio_submatch(struct device *, struct cfdata *, void *); 114 115 struct sableio_softc *sableio_attached; 116 117 int 118 sableio_match(struct device *parent, struct cfdata *cf, void *aux) 119 { 120 struct pcibus_attach_args *pba = aux; 121 122 if (strcmp(pba->pba_busname, cf->cf_name) != 0) 123 return (0); 124 125 /* 126 * These are really ISA devices, and thus must be on 127 * PCI bus 0. 128 */ 129 if (cf->pcibuscf_bus != PCIBUS_UNK_BUS && 130 cf->pcibuscf_bus != pba->pba_bus) 131 return (0); 132 133 /* sanity */ 134 if (pba->pba_bus != 0) 135 return (0); 136 137 /* There can be only one. */ 138 if (sableio_attached != NULL) 139 return (0); 140 141 return (1); 142 } 143 144 void 145 sableio_attach(struct device *parent, struct device *self, void *aux) 146 { 147 struct sableio_softc *sc = (void *) self; 148 struct pcibus_attach_args *pba = aux; 149 struct sableio_attach_args sa; 150 bus_dma_tag_t dmat; 151 int i; 152 153 printf(": Sable STDIO module\n"); 154 155 sableio_attached = sc; 156 157 dmat = alphabus_dma_get_tag(pba->pba_dmat, ALPHA_BUS_ISA); 158 159 #if NISADMA > 0 160 /* 161 * Initialize our DMA state. 162 */ 163 isa_dmainit(&sc->sc_isa_chipset, pba->pba_iot, dmat, self); 164 #endif 165 166 for (i = 0; sableio_devs[i].sd_name != NULL; i++) { 167 sa.sa_name = sableio_devs[i].sd_name; 168 sa.sa_ioaddr = sableio_devs[i].sd_ioaddr; 169 sa.sa_sableirq[0] = sableio_devs[i].sd_sableirq[0]; 170 sa.sa_sableirq[1] = sableio_devs[i].sd_sableirq[1]; 171 sa.sa_drq = sableio_devs[i].sd_drq; 172 173 sa.sa_iot = pba->pba_iot; 174 sa.sa_dmat = dmat; 175 sa.sa_ic = &sc->sc_isa_chipset; 176 sa.sa_pc = pba->pba_pc; 177 178 (void) config_found_sm(self, &sa, sableio_print, 179 sableio_submatch); 180 } 181 } 182 183 int 184 sableio_submatch(struct device *parent, struct cfdata *cf, void *aux) 185 { 186 struct sableio_attach_args *sa = aux; 187 188 if (cf->cf_loc[SABLEIOCF_PORT] != SABLEIOCF_PORT_DEFAULT && 189 cf->cf_loc[SABLEIOCF_PORT] != sa->sa_ioaddr) 190 return (0); 191 192 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 193 } 194 195 int 196 sableio_print(void *aux, const char *pnp) 197 { 198 struct sableio_attach_args *sa = aux; 199 200 if (pnp != NULL) 201 printf("%s at %s", sa->sa_name, pnp); 202 203 printf(" port 0x%lx", sa->sa_ioaddr); 204 return (UNCONF); 205 } 206 207 isa_chipset_tag_t 208 sableio_pickisa(void) 209 { 210 211 if (sableio_attached == NULL) 212 panic("sableio_pickisa"); 213 214 return (&sableio_attached->sc_isa_chipset); 215 } 216
Indexes created Mon Sep 29 18:09:42 GMT 2025