fdc_jazzio.c revision 1.10
1 /* $NetBSD: fdc_jazzio.c,v 1.10 2005/01/22 07:35:34 tsutsui Exp $ */ 2 /* $OpenBSD: fd.c,v 1.6 1998/10/03 21:18:57 millert Exp $ */ 3 /* NetBSD: fd.c,v 1.78 1995/07/04 07:23:09 mycroft Exp */ 4 5 /*- 6 * Copyright (c) 1998 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Charles M. Hannum. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /*- 42 * Copyright (c) 1990 The Regents of the University of California. 43 * All rights reserved. 44 * 45 * This code is derived from software contributed to Berkeley by 46 * Don Ahn. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)fd.c 7.4 (Berkeley) 5/25/91 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: fdc_jazzio.c,v 1.10 2005/01/22 07:35:34 tsutsui Exp $"); 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/callout.h> 81 #include <sys/device.h> 82 83 #include <machine/autoconf.h> 84 #include <machine/bus.h> 85 86 #include <arc/jazz/jazzdmatlbreg.h> 87 #include <arc/jazz/fdreg.h> 88 #include <arc/jazz/fdcvar.h> 89 #include <arc/jazz/jazziovar.h> 90 #include <arc/jazz/dma.h> 91 92 /* controller driver configuration */ 93 int fdc_jazzio_probe(struct device *, struct cfdata *, void *); 94 void fdc_jazzio_attach(struct device *, struct device *, void *); 95 96 /* MD DMA hook functions */ 97 void fdc_jazzio_dma_start(struct fdc_softc *, caddr_t, size_t, int); 98 void fdc_jazzio_dma_abort(struct fdc_softc *); 99 void fdc_jazzio_dma_done(struct fdc_softc *); 100 101 /* software state, per controller */ 102 struct fdc_jazzio_softc { 103 struct fdc_softc sc_fdc; /* base fdc device */ 104 105 bus_space_handle_t sc_baseioh; /* base I/O handle */ 106 bus_space_handle_t sc_dmaioh; /* DMA I/O handle */ 107 108 bus_dma_tag_t sc_dmat; /* bus_dma tag */ 109 bus_dmamap_t sc_dmamap; /* bus_dma map */ 110 int sc_datain; /* data direction */ 111 }; 112 113 CFATTACH_DECL(fdc_jazzio, sizeof(struct fdc_jazzio_softc), 114 fdc_jazzio_probe, fdc_jazzio_attach, NULL, NULL); 115 116 #define FDC_NPORT 6 117 #define FDC_OFFSET 2 /* Should we use bus_space_subregion() or not? */ 118 119 int 120 fdc_jazzio_probe(struct device *parent, struct cfdata *match, void *aux) 121 { 122 struct jazzio_attach_args *ja = aux; 123 bus_space_tag_t iot; 124 bus_space_handle_t base_ioh, ioh; 125 int rv; 126 127 if (strcmp(ja->ja_name, "I82077") != 0) 128 return 0; 129 130 iot = ja->ja_bust; 131 rv = 0; 132 133 /* Map the I/O space. */ 134 if (bus_space_map(iot, ja->ja_addr, 135 FDC_OFFSET + FDC_NPORT, 0, &base_ioh)) 136 return 0; 137 138 if (bus_space_subregion(iot, base_ioh, FDC_OFFSET, FDC_NPORT, &ioh)) 139 goto out; 140 141 /* reset */ 142 bus_space_write_1(iot, ioh, FDOUT, 0); 143 delay(100); 144 bus_space_write_1(iot, ioh, FDOUT, FDO_FRST); 145 146 /* see if it can handle a command */ 147 if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0) 148 goto out; 149 out_fdc(iot, ioh, 0xdf); /* XXX */ 150 out_fdc(iot, ioh, 2); /* XXX */ 151 152 rv = 1; 153 154 out: 155 bus_space_unmap(iot, base_ioh, FDC_OFFSET + FDC_NPORT); 156 return rv; 157 } 158 159 void 160 fdc_jazzio_attach(struct device *parent, struct device *self, void *aux) 161 { 162 struct fdc_jazzio_softc *jsc = (struct fdc_jazzio_softc *)self; 163 struct fdc_softc *fdc = &jsc->sc_fdc; 164 struct jazzio_attach_args *ja = aux; 165 166 fdc->sc_iot = ja->ja_bust; 167 168 fdc->sc_maxiosize = MAXPHYS; 169 fdc->sc_dma_start = fdc_jazzio_dma_start; 170 fdc->sc_dma_abort = fdc_jazzio_dma_abort; 171 fdc->sc_dma_done = fdc_jazzio_dma_done; 172 173 jsc->sc_dmat = ja->ja_dmat; 174 175 if (bus_space_map(fdc->sc_iot, ja->ja_addr, 176 FDC_OFFSET + FDC_NPORT, 0, &jsc->sc_baseioh)) { 177 printf(": unable to map I/O space\n"); 178 return; 179 } 180 181 if (bus_space_subregion(fdc->sc_iot, jsc->sc_baseioh, 182 FDC_OFFSET, FDC_NPORT, &fdc->sc_ioh)) { 183 printf(": unable to subregion I/O space\n"); 184 goto out_unmap1; 185 } 186 187 if (bus_space_map(fdc->sc_iot, jazzio_conf->jc_fdcdmareg, 188 R4030_DMA_RANGE, 0, &jsc->sc_dmaioh)) { 189 printf(": unable to map DMA I/O space\n"); 190 goto out_unmap1; 191 } 192 193 if (bus_dmamap_create(jsc->sc_dmat, MAXPHYS, 1, MAXPHYS, 0, 194 BUS_DMA_ALLOCNOW|BUS_DMA_NOWAIT, &jsc->sc_dmamap)) { 195 printf(": unable to create DMA map\n"); 196 goto out_unmap2; 197 } 198 199 printf("\n"); 200 201 jazzio_intr_establish(ja->ja_intr, fdcintr, fdc); 202 203 fdcattach(fdc); 204 return; 205 206 out_unmap2: 207 bus_space_unmap(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_RANGE); 208 out_unmap1: 209 bus_space_unmap(fdc->sc_iot, jsc->sc_baseioh, FDC_OFFSET + FDC_NPORT); 210 } 211 212 void 213 fdc_jazzio_dma_start(struct fdc_softc *fdc, caddr_t addr, size_t size, 214 int datain) 215 { 216 struct fdc_jazzio_softc *jsc = (void *)fdc; 217 218 /* halt DMA */ 219 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_ENAB, 0); 220 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_MODE, 0); 221 222 jsc->sc_datain = datain; 223 224 bus_dmamap_load(jsc->sc_dmat, jsc->sc_dmamap, addr, size, NULL, 225 BUS_DMA_NOWAIT | BUS_DMA_STREAMING | 226 (datain ? BUS_DMA_READ : BUS_DMA_WRITE)); 227 bus_dmamap_sync(jsc->sc_dmat, jsc->sc_dmamap, 228 0, jsc->sc_dmamap->dm_mapsize, 229 datain ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 230 231 /* load new transfer parameters */ 232 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, 233 R4030_DMA_ADDR, jsc->sc_dmamap->dm_segs[0].ds_addr); 234 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, 235 R4030_DMA_COUNT, jsc->sc_dmamap->dm_segs[0].ds_len); 236 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, 237 R4030_DMA_MODE, R4030_DMA_MODE_160NS | R4030_DMA_MODE_8); 238 239 /* start DMA */ 240 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, 241 R4030_DMA_ENAB, R4030_DMA_ENAB_RUN | 242 (datain ? R4030_DMA_ENAB_READ : R4030_DMA_ENAB_WRITE)); 243 } 244 245 void 246 fdc_jazzio_dma_abort(struct fdc_softc *fdc) 247 { 248 struct fdc_jazzio_softc *jsc = (void *)fdc; 249 250 /* halt DMA */ 251 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_ENAB, 0); 252 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_MODE, 0); 253 } 254 255 void 256 fdc_jazzio_dma_done(struct fdc_softc *fdc) 257 { 258 struct fdc_jazzio_softc *jsc = (void *)fdc; 259 260 /* halt DMA */ 261 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_COUNT, 0); 262 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_ENAB, 0); 263 bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_MODE, 0); 264 265 bus_dmamap_sync(jsc->sc_dmat, jsc->sc_dmamap, 266 0, jsc->sc_dmamap->dm_mapsize, 267 jsc->sc_datain ? BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 268 bus_dmamap_unload(jsc->sc_dmat, jsc->sc_dmamap); 269 } 270
Indexes created Thu Oct 02 07:10:07 GMT 2025