atppc_isa.c revision 1.4
1 /* $NetBSD: atppc_isa.c,v 1.4 2004/01/25 11:35:46 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 Alcove - Nicolas Souchu 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp 29 * 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: atppc_isa.c,v 1.4 2004/01/25 11:35:46 jdolecek Exp $"); 34 35 #include "opt_atppc.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/device.h> 42 43 #include <machine/intr.h> 44 #include <machine/bus.h> 45 46 #include <dev/isa/isareg.h> 47 #include <dev/isa/isavar.h> 48 #include <dev/isa/isadmavar.h> 49 50 #include <dev/ic/atppcreg.h> 51 #include <dev/ic/atppcvar.h> 52 #include <dev/isa/atppc_isadma.h> 53 54 /* 55 * ISA bus attach code for atppc driver. 56 * Note on capabilities: capabilites may exist in the chipset but may not 57 * necessarily be useable. I.e. you may specify an IRQ in the autoconfig, but 58 * will the port actually have an IRQ assigned to it at the hardware level? 59 * How can you test if the capabilites can be used? For interrupts, see if a 60 * handler exists (sc_intr != NULL). For DMA, see if the sc_dma_start() and 61 * sc_dma_finish() function pointers are not NULL. 62 */ 63 64 /* Configuration data for atppc on isa bus. */ 65 struct atppc_isa_softc { 66 /* Machine independent device data */ 67 struct atppc_softc sc_atppc; 68 69 /* IRQ/DRQ/IO Port assignments on ISA bus */ 70 int sc_irq; 71 int sc_drq; 72 int sc_iobase; 73 74 /* ISA chipset tag */ 75 isa_chipset_tag_t sc_ic; 76 }; 77 78 /* Probe and attach functions for a atppc device on the ISA bus. */ 79 static int atppc_isa_probe __P((struct device *, struct cfdata *, void *)); 80 static void atppc_isa_attach __P((struct device *, struct device *, void *)); 81 82 static int atppc_isa_dma_start(struct atppc_softc *, void *, u_int, 83 u_int8_t); 84 static int atppc_isa_dma_finish(struct atppc_softc *); 85 static int atppc_isa_dma_abort(struct atppc_softc *); 86 static int atppc_isa_dma_malloc(struct device *, caddr_t *, bus_addr_t *, 87 bus_size_t); 88 static void atppc_isa_dma_free(struct device *, caddr_t *, bus_addr_t *, 89 bus_size_t); 90 91 CFATTACH_DECL(atppc_isa, sizeof(struct atppc_isa_softc), atppc_isa_probe, 92 atppc_isa_attach, NULL, NULL); 93 94 /* 95 * Probe function: find parallel port controller on isa bus. Combined from 96 * lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c. 97 */ 98 static int 99 atppc_isa_probe(struct device * parent, struct cfdata * cf, void * aux) 100 { 101 bus_space_handle_t ioh; 102 struct isa_attach_args * ia = aux; 103 bus_space_tag_t iot = ia->ia_iot; 104 105 if (ia->ia_nio < 1) 106 return (0); 107 108 /* Disallow wildcarded i/o address */ 109 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 110 return (0); 111 112 if (bus_space_map(iot, ia->ia_io[0].ir_addr, IO_LPTSIZE, 0, &ioh)) 113 return (0); 114 115 if (atppc_detect_port(iot, ioh) != 0) 116 return (0); 117 118 ia->ia_nio = 1; 119 ia->ia_io[0].ir_size = IO_LPTSIZE; 120 ia->ia_nirq = 1; 121 ia->ia_ndrq = 1; 122 ia->ia_niomem = 0; 123 124 return (1); 125 } 126 127 /* Attach function: attach and configure parallel port controller on isa bus. */ 128 static void 129 atppc_isa_attach(struct device *parent, struct device *self, void *aux) 130 { 131 struct atppc_isa_softc * sc = (struct atppc_isa_softc *)self; 132 struct atppc_softc * lsc = (struct atppc_softc *)self; 133 struct isa_attach_args * ia = aux; 134 135 printf(": AT Parallel Port\n"); 136 137 lsc->sc_iot = ia->ia_iot; 138 lsc->sc_dmat = ia->ia_dmat; 139 lsc->sc_has = 0; 140 sc->sc_ic = ia->ia_ic; 141 sc->sc_iobase = ia->ia_io->ir_addr; 142 143 if (bus_space_map(lsc->sc_iot, sc->sc_iobase, IO_LPTSIZE, 0, 144 &lsc->sc_ioh) != 0) { 145 printf("%s: attempt to map bus space failed, device not " 146 "properly attached.\n", self->dv_xname); 147 lsc->sc_dev_ok = ATPPC_NOATTACH; 148 return; 149 } 150 151 lsc->sc_dev_ok = ATPPC_ATTACHED; 152 153 /* Assign interrupt handler */ 154 if (!(self->dv_cfdata->cf_flags & ATPPC_FLAG_DISABLE_INTR) 155 && ia->ia_irq->ir_irq != ISACF_IRQ_DEFAULT 156 && ia->ia_nirq >= 1) { 157 sc->sc_irq = ia->ia_irq[0].ir_irq; 158 } else 159 sc->sc_irq = -1; 160 161 if (sc->sc_irq > 0) { 162 /* Establish interrupt handler. */ 163 lsc->sc_ieh = isa_intr_establish(sc->sc_ic, sc->sc_irq, 164 IST_EDGE, IPL_ATPPC, atppcintr, &lsc->sc_dev); 165 166 lsc->sc_has |= ATPPC_HAS_INTR; 167 } 168 169 /* Configure DMA */ 170 if (!(self->dv_cfdata->cf_flags & ATPPC_FLAG_DISABLE_DMA) 171 && ia->ia_drq->ir_drq != ISACF_DRQ_DEFAULT 172 && ia->ia_ndrq >= 1) 173 sc->sc_drq = ia->ia_drq[0].ir_drq; 174 else 175 sc->sc_drq = -1; 176 177 if (sc->sc_drq != -1 178 && atppc_isadma_setup(lsc, sc->sc_ic, sc->sc_drq) == 0) { 179 lsc->sc_has |= ATPPC_HAS_DMA; 180 181 /* setup DMA hooks */ 182 lsc->sc_dma_start = atppc_isa_dma_start; 183 lsc->sc_dma_finish = atppc_isa_dma_finish; 184 lsc->sc_dma_abort = atppc_isa_dma_abort; 185 lsc->sc_dma_malloc = atppc_isa_dma_malloc; 186 lsc->sc_dma_free = atppc_isa_dma_free; 187 } 188 189 /* Run soft configuration attach */ 190 atppc_sc_attach(lsc); 191 192 return; 193 } 194 195 /* Start DMA operation over ISA bus */ 196 static int 197 atppc_isa_dma_start(struct atppc_softc *lsc, void *buf, u_int nbytes, 198 u_int8_t mode) 199 { 200 struct atppc_isa_softc * sc = (struct atppc_isa_softc *) lsc; 201 202 return atppc_isadma_start(sc->sc_ic, sc->sc_drq, buf, nbytes, mode); 203 } 204 205 /* Stop DMA operation over ISA bus */ 206 static int 207 atppc_isa_dma_finish(struct atppc_softc * lsc) 208 { 209 struct atppc_isa_softc * sc = (struct atppc_isa_softc *) lsc; 210 211 return atppc_isadma_finish(sc->sc_ic, sc->sc_drq); 212 } 213 214 /* Abort DMA operation over ISA bus */ 215 static int 216 atppc_isa_dma_abort(struct atppc_softc * lsc) 217 { 218 struct atppc_isa_softc * sc = (struct atppc_isa_softc *) lsc; 219 220 return atppc_isadma_abort(sc->sc_ic, sc->sc_drq); 221 } 222 223 /* Allocate memory for DMA over ISA bus */ 224 static int 225 atppc_isa_dma_malloc(struct device * dev, caddr_t * buf, bus_addr_t * bus_addr, 226 bus_size_t size) 227 { 228 struct atppc_isa_softc * sc = (struct atppc_isa_softc *) dev; 229 230 return atppc_isadma_malloc(sc->sc_ic, sc->sc_drq, buf, bus_addr, size); 231 } 232 233 /* Free memory allocated by atppc_isa_dma_malloc() */ 234 static void 235 atppc_isa_dma_free(struct device * dev, caddr_t * buf, bus_addr_t * bus_addr, 236 bus_size_t size) 237 { 238 struct atppc_isa_softc * sc = (struct atppc_isa_softc *) dev; 239 240 return atppc_isadma_free(sc->sc_ic, sc->sc_drq, buf, bus_addr, size); 241 } 242
Indexes created Fri Oct 03 02:09:57 GMT 2025