atppc_puc.c revision 1.11
1 /* $NetBSD: atppc_puc.c,v 1.11 2009/11/26 15:17:08 njoly Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jaromir Dolecek. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "opt_atppc.h" 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: atppc_puc.c,v 1.11 2009/11/26 15:17:08 njoly Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/errno.h> 40 #include <sys/ioctl.h> 41 #include <sys/syslog.h> 42 #include <sys/device.h> 43 #include <sys/proc.h> 44 #include <sys/termios.h> 45 46 #include <sys/bus.h> 47 #include <uvm/uvm_extern.h> 48 49 #include <dev/pci/pcivar.h> 50 #include <dev/pci/pucvar.h> 51 52 #include <dev/ic/atppcvar.h> 53 54 static int atppc_puc_match(device_t, cfdata_t, void *); 55 static void atppc_puc_attach(device_t, device_t, void *); 56 57 struct atppc_puc_softc { 58 /* Machine independent device data */ 59 struct atppc_softc sc_atppc; 60 61 bus_dmamap_t sc_dmamap; 62 }; 63 64 CFATTACH_DECL_NEW(atppc_puc, sizeof(struct atppc_puc_softc), atppc_puc_match, 65 atppc_puc_attach, NULL, NULL); 66 67 static int atppc_puc_dma_setup(struct atppc_puc_softc *); 68 static int atppc_puc_dma_start(struct atppc_softc *, void *, u_int, 69 u_int8_t); 70 static int atppc_puc_dma_finish(struct atppc_softc *); 71 static int atppc_puc_dma_abort(struct atppc_softc *); 72 static int atppc_puc_dma_malloc(device_t, void **, bus_addr_t *, 73 bus_size_t); 74 static void atppc_puc_dma_free(device_t, void **, bus_addr_t *, 75 bus_size_t); 76 77 /* 78 * atppc_acpi_match: autoconf(9) match routine 79 */ 80 static int 81 atppc_puc_match(device_t parent, cfdata_t match, void *aux) 82 { 83 struct puc_attach_args *aa = aux; 84 85 /* 86 * Locators already matched, just check the type. 87 */ 88 if (aa->type != PUC_PORT_TYPE_LPT) 89 return (0); 90 91 return (1); 92 } 93 94 static void 95 atppc_puc_attach(device_t parent, device_t self, void *aux) 96 { 97 struct atppc_softc *sc = device_private(self); 98 struct atppc_puc_softc *psc = device_private(self); 99 struct puc_attach_args *aa = aux; 100 const char *intrstr; 101 102 sc->sc_dev_ok = ATPPC_NOATTACH; 103 104 printf(": AT Parallel Port\n"); 105 106 /* Attach */ 107 sc->sc_dev = self; 108 sc->sc_iot = aa->t; 109 sc->sc_ioh = aa->h; 110 sc->sc_dmat = aa->dmat; 111 sc->sc_has = 0; 112 113 intrstr = pci_intr_string(aa->pc, aa->intrhandle); 114 sc->sc_ieh = pci_intr_establish(aa->pc, aa->intrhandle, IPL_TTY, 115 atppcintr, sc); 116 if (sc->sc_ieh == NULL) { 117 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt"); 118 if (intrstr != NULL) 119 aprint_error(" at %s", intrstr); 120 aprint_error("\n"); 121 return; 122 } 123 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr); 124 sc->sc_has |= ATPPC_HAS_INTR; 125 126 /* setup DMA hooks */ 127 if (atppc_puc_dma_setup(psc) == 0) { 128 sc->sc_has |= ATPPC_HAS_DMA; 129 sc->sc_dma_start = atppc_puc_dma_start; 130 sc->sc_dma_finish = atppc_puc_dma_finish; 131 sc->sc_dma_abort = atppc_puc_dma_abort; 132 sc->sc_dma_malloc = atppc_puc_dma_malloc; 133 sc->sc_dma_free = atppc_puc_dma_free; 134 } 135 136 /* Finished attach */ 137 sc->sc_dev_ok = ATPPC_ATTACHED; 138 139 /* Run soft configuration attach */ 140 atppc_sc_attach(sc); 141 } 142 143 /* Setup DMA structures */ 144 static int 145 atppc_puc_dma_setup(struct atppc_puc_softc *psc) 146 { 147 return EOPNOTSUPP; /* XXX DMA not tested yet */ 148 #if 0 149 struct atppc_softc *sc = (struct atppc_softc *)psc; 150 int error; 151 152 #define BUFSIZE PAGE_SIZE /* XXX see lptvar.h */ 153 if ((error = bus_dmamap_create(sc->sc_dmat, BUFSIZE, 1, BUFSIZE, 0, 154 BUS_DMA_NOWAIT, &psc->sc_dmamap))) 155 return error; 156 157 return (0); 158 #endif 159 } 160 161 /* Start DMA operation over PCI bus */ 162 static int 163 atppc_puc_dma_start(struct atppc_softc *dev, void *buf, u_int nbytes, 164 u_int8_t mode) 165 { 166 struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev; 167 struct atppc_softc *sc = &psc->sc_atppc; 168 169 bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, nbytes, 170 (mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMASYNC_PREWRITE 171 : BUS_DMASYNC_PREREAD); 172 173 return (0); 174 } 175 176 /* Stop DMA operation over PCI bus */ 177 static int 178 atppc_puc_dma_finish(struct atppc_softc *dev) 179 { 180 181 struct atppc_puc_softc *psc = (struct atppc_puc_softc *) dev; 182 struct atppc_softc *sc = &psc->sc_atppc; 183 184 /* 185 * We don't know direction of DMA, so sync both. We can safely 186 * assume the dma map is loaded. 187 */ 188 bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, 189 psc->sc_dmamap->dm_segs[0].ds_len, 190 BUS_DMASYNC_POSTWRITE|BUS_DMASYNC_POSTREAD); 191 192 return (0); 193 } 194 195 /* Abort DMA operation over PCI bus */ 196 int 197 atppc_puc_dma_abort(struct atppc_softc * lsc) 198 { 199 200 /* Nothing to do - we do not need to sync, op is aborted */ 201 return (0); 202 } 203 204 /* Allocate memory for DMA over PCI bus */ 205 int 206 atppc_puc_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr, 207 bus_size_t size) 208 { 209 struct atppc_puc_softc *psc = device_private(dev); 210 struct atppc_softc *sc = &psc->sc_atppc; 211 int error; 212 213 error = bus_dmamap_load(sc->sc_dmat, psc->sc_dmamap, *buf, size, 214 NULL /* kernel address */, BUS_DMA_WAITOK|BUS_DMA_STREAMING); 215 if (error) 216 return (error); 217 218 *bus_addr = psc->sc_dmamap->dm_segs[0].ds_addr; 219 return (0); 220 } 221 222 /* Free memory allocated by atppc_isa_dma_malloc() */ 223 void 224 atppc_puc_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr, 225 bus_size_t size) 226 { 227 struct atppc_puc_softc *psc = device_private(dev); 228 struct atppc_softc *sc = &psc->sc_atppc; 229 230 return (bus_dmamap_unload(sc->sc_dmat, psc->sc_dmamap)); 231 } 232
Indexes created Wed Oct 01 15:09:59 GMT 2025