1 /* $NetBSD: atppc_isa.c,v 1.17 2022/09/25 17:09:36 thorpej 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 1.17 2022/09/25 17:09:36 thorpej 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/device.h> 41 42 #include <sys/intr.h> 43 #include <sys/bus.h> 44 45 #include <dev/isa/isareg.h> 46 #include <dev/isa/isavar.h> 47 #include <dev/isa/isadmavar.h> 48 49 #include <dev/ic/atppcreg.h> 50 #include <dev/ic/atppcvar.h> 51 #include <dev/isa/atppc_isadma.h> 52 53 /* 54 * ISA bus attach code for atppc driver. 55 * Note on capabilities: capabilities may exist in the chipset but may not 56 * necessarily be useable. I.e. you may specify an IRQ in the autoconfig, but 57 * will the port actually have an IRQ assigned to it at the hardware level? 58 * How can you test if the capabilities can be used? For interrupts, see if a 59 * handler exists (sc_intr != NULL). For DMA, see if the sc_dma_start() and 60 * sc_dma_finish() function pointers are not NULL. 61 */ 62 63 /* Configuration data for atppc on isa bus. */ 64 struct atppc_isa_softc { 65 /* Machine independent device data */ 66 struct atppc_softc sc_atppc; 67 68 /* IRQ/DRQ/IO Port assignments on ISA bus */ 69 int sc_irq; 70 int sc_drq; 71 int sc_iobase; 72 73 /* ISA chipset tag */ 74 isa_chipset_tag_t sc_ic; 75 }; 76 77 /* Probe and attach functions for a atppc device on the ISA bus. */ 78 static int atppc_isa_probe(device_t, cfdata_t, void *); 79 static void atppc_isa_attach(device_t, device_t, void *); 80 81 static int atppc_isa_dma_start(struct atppc_softc *, void *, u_int, 82 u_int8_t); 83 static int atppc_isa_dma_finish(struct atppc_softc *); 84 static int atppc_isa_dma_abort(struct atppc_softc *); 85 static int atppc_isa_dma_malloc(device_t, void **, bus_addr_t *, 86 bus_size_t); 87 static void atppc_isa_dma_free(device_t, void **, bus_addr_t *, 88 bus_size_t); 89 90 CFATTACH_DECL_NEW(atppc_isa, sizeof(struct atppc_isa_softc), atppc_isa_probe, 91 atppc_isa_attach, NULL, NULL); 92 93 /* 94 * Probe function: find parallel port controller on isa bus. Combined from 95 * lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c. 96 */ 97 static int 98 atppc_isa_probe(device_t parent, cfdata_t cf, void *aux) 99 { 100 bus_space_handle_t ioh; 101 struct isa_attach_args *ia = aux; 102 bus_space_tag_t iot = ia->ia_iot; 103 int rval = 0; 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 == ISA_UNKNOWN_PORT) 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 rval = 1; 117 118 bus_space_unmap(iot, ioh, IO_LPTSIZE); 119 120 if (rval) { 121 ia->ia_nio = 1; 122 ia->ia_io[0].ir_size = IO_LPTSIZE; 123 ia->ia_nirq = 1; 124 ia->ia_ndrq = 1; 125 ia->ia_niomem = 0; 126 } 127 return (rval); 128 } 129 130 /* Attach function: attach and configure parallel port controller on isa bus. */ 131 static void 132 atppc_isa_attach(device_t parent, device_t self, void *aux) 133 { 134 struct atppc_isa_softc *sc = device_private(self); 135 struct atppc_softc *lsc = &sc->sc_atppc; 136 struct isa_attach_args *ia = aux; 137 138 printf(": AT Parallel Port\n"); 139 140 lsc->sc_iot = ia->ia_iot; 141 lsc->sc_dmat = ia->ia_dmat; 142 lsc->sc_has = 0; 143 sc->sc_ic = ia->ia_ic; 144 sc->sc_iobase = ia->ia_io->ir_addr; 145 146 if (bus_space_map(lsc->sc_iot, sc->sc_iobase, IO_LPTSIZE, 0, 147 &lsc->sc_ioh) != 0) { 148 aprint_error_dev(self, "attempt to map bus space failed, device not " 149 "properly attached.\n"); 150 lsc->sc_dev_ok = ATPPC_NOATTACH; 151 return; 152 } 153 154 lsc->sc_dev = self; 155 lsc->sc_dev_ok = ATPPC_ATTACHED; 156 157 /* Assign interrupt handler */ 158 if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_INTR) 159 && ia->ia_irq->ir_irq != ISA_UNKNOWN_IRQ 160 && ia->ia_nirq >= 1) { 161 sc->sc_irq = ia->ia_irq[0].ir_irq; 162 } else 163 sc->sc_irq = -1; 164 165 if (sc->sc_irq > 0) { 166 /* Establish interrupt handler. */ 167 lsc->sc_ieh = isa_intr_establish(sc->sc_ic, sc->sc_irq, 168 IST_EDGE, IPL_TTY, atppcintr, lsc->sc_dev); 169 170 lsc->sc_has |= ATPPC_HAS_INTR; 171 } 172 173 /* Configure DMA */ 174 if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_DMA) 175 && ia->ia_drq->ir_drq != ISA_UNKNOWN_DRQ 176 && ia->ia_ndrq >= 1) 177 sc->sc_drq = ia->ia_drq[0].ir_drq; 178 else 179 sc->sc_drq = -1; 180 181 if (sc->sc_drq != -1 182 && atppc_isadma_setup(lsc, sc->sc_ic, sc->sc_drq) == 0) { 183 lsc->sc_has |= ATPPC_HAS_DMA; 184 185 /* setup DMA hooks */ 186 lsc->sc_dma_start = atppc_isa_dma_start; 187 lsc->sc_dma_finish = atppc_isa_dma_finish; 188 lsc->sc_dma_abort = atppc_isa_dma_abort; 189 lsc->sc_dma_malloc = atppc_isa_dma_malloc; 190 lsc->sc_dma_free = atppc_isa_dma_free; 191 } 192 193 /* Run soft configuration attach */ 194 atppc_sc_attach(lsc); 195 196 return; 197 } 198 199 /* Start DMA operation over ISA bus */ 200 static int 201 atppc_isa_dma_start(struct atppc_softc *lsc, void *buf, u_int nbytes, 202 u_int8_t mode) 203 { 204 struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc; 205 206 return atppc_isadma_start(sc->sc_ic, sc->sc_drq, buf, nbytes, mode); 207 } 208 209 /* Stop DMA operation over ISA bus */ 210 static int 211 atppc_isa_dma_finish(struct atppc_softc *lsc) 212 { 213 struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc; 214 215 return atppc_isadma_finish(sc->sc_ic, sc->sc_drq); 216 } 217 218 /* Abort DMA operation over ISA bus */ 219 static int 220 atppc_isa_dma_abort(struct atppc_softc *lsc) 221 { 222 struct atppc_isa_softc *sc = (struct atppc_isa_softc *) lsc; 223 224 return atppc_isadma_abort(sc->sc_ic, sc->sc_drq); 225 } 226 227 /* Allocate memory for DMA over ISA bus */ 228 static int 229 atppc_isa_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr, 230 bus_size_t size) 231 { 232 struct atppc_isa_softc *sc = device_private(dev); 233 234 return atppc_isadma_malloc(sc->sc_ic, sc->sc_drq, buf, bus_addr, size); 235 } 236 237 /* Free memory allocated by atppc_isa_dma_malloc() */ 238 static void 239 atppc_isa_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr, 240 bus_size_t size) 241 { 242 struct atppc_isa_softc *sc = device_private(dev); 243 244 return atppc_isadma_free(sc->sc_ic, sc->sc_drq, buf, bus_addr, size); 245 } 246
Indexes created Fri Oct 03 02:09:57 GMT 2025