Annotation of sys/dev/isa/wdc_isa.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: wdc_isa.c,v 1.12 2006/08/26 14:55:35 jsg Exp $ */
! 2: /* $NetBSD: wdc_isa.c,v 1.15 1999/05/19 14:41:25 bouyer Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Charles M. Hannum and by Onno van der Linden.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: #include <sys/types.h>
! 41: #include <sys/param.h>
! 42: #include <sys/systm.h>
! 43: #include <sys/device.h>
! 44: #include <sys/malloc.h>
! 45:
! 46: #include <machine/bus.h>
! 47: #include <machine/intr.h>
! 48:
! 49: #include <dev/isa/isavar.h>
! 50: #include <dev/isa/isadmavar.h>
! 51:
! 52: #include <dev/ata/atavar.h>
! 53: #include <dev/ic/wdcvar.h>
! 54:
! 55: #include "isadma.h"
! 56:
! 57: #define WDC_ISA_REG_NPORTS 8
! 58: #define WDC_ISA_AUXREG_OFFSET 0x206
! 59: #define WDC_ISA_AUXREG_NPORTS 1 /* XXX "fdc" owns ports 0x3f7/0x377 */
! 60:
! 61: /* options passed via the 'flags' config keyword */
! 62: #define WDC_OPTIONS_32 0x01 /* try to use 32bit data I/O */
! 63:
! 64: struct wdc_isa_softc {
! 65: struct wdc_softc sc_wdcdev;
! 66: struct channel_softc *wdc_chanptr;
! 67: struct channel_softc wdc_channel;
! 68: struct device *sc_isa;
! 69: isa_chipset_tag_t sc_ic;
! 70: void *sc_ih;
! 71: int sc_drq;
! 72: };
! 73:
! 74: int wdc_isa_probe(struct device *, void *, void *);
! 75: void wdc_isa_attach(struct device *, struct device *, void *);
! 76:
! 77: struct cfattach wdc_isa_ca = {
! 78: sizeof(struct wdc_isa_softc), wdc_isa_probe, wdc_isa_attach
! 79: };
! 80:
! 81: #if NISADMA > 0
! 82: static void wdc_isa_dma_setup(struct wdc_isa_softc *);
! 83: static int wdc_isa_dma_init(void *, int, int, void *, size_t, int);
! 84: static void wdc_isa_dma_start(void *, int, int);
! 85: static int wdc_isa_dma_finish(void *, int, int, int);
! 86: #endif /* NISADMA > 0 */
! 87:
! 88: int
! 89: wdc_isa_probe(struct device *parent, void *match, void *aux)
! 90: {
! 91: struct channel_softc ch;
! 92: struct isa_attach_args *ia = aux;
! 93: struct cfdata *cf = match;
! 94: int result = 0;
! 95:
! 96: bzero(&ch, sizeof ch);
! 97: ch.cmd_iot = ia->ia_iot;
! 98: if (bus_space_map(ch.cmd_iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0,
! 99: &ch.cmd_ioh))
! 100: goto out;
! 101:
! 102: ch.ctl_iot = ia->ia_iot;
! 103: if (bus_space_map(ch.ctl_iot, ia->ia_iobase + WDC_ISA_AUXREG_OFFSET,
! 104: WDC_ISA_AUXREG_NPORTS, 0, &ch.ctl_ioh))
! 105: goto outunmap;
! 106:
! 107: if (cf->cf_flags & WDC_OPTION_PROBE_VERBOSE)
! 108: ch.ch_flags |= WDCF_VERBOSE_PROBE;
! 109:
! 110: result = wdcprobe(&ch);
! 111: if (result) {
! 112: ia->ia_iosize = WDC_ISA_REG_NPORTS;
! 113: ia->ia_msize = 0;
! 114: }
! 115:
! 116: bus_space_unmap(ch.ctl_iot, ch.ctl_ioh, WDC_ISA_AUXREG_NPORTS);
! 117: outunmap:
! 118: bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, WDC_ISA_REG_NPORTS);
! 119: out:
! 120: return (result);
! 121: }
! 122:
! 123: void
! 124: wdc_isa_attach(struct device *parent, struct device *self, void *aux)
! 125: {
! 126: struct wdc_isa_softc *sc = (void *)self;
! 127: struct isa_attach_args *ia = aux;
! 128:
! 129: printf("\n");
! 130:
! 131: sc->wdc_channel.cmd_iot = ia->ia_iot;
! 132: sc->wdc_channel.ctl_iot = ia->ia_iot;
! 133: sc->sc_ic = ia->ia_ic;
! 134: sc->sc_isa = parent;
! 135:
! 136: if (bus_space_map(sc->wdc_channel.cmd_iot, ia->ia_iobase,
! 137: WDC_ISA_REG_NPORTS, 0, &sc->wdc_channel.cmd_ioh) ||
! 138: bus_space_map(sc->wdc_channel.ctl_iot,
! 139: ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, WDC_ISA_AUXREG_NPORTS,
! 140: 0, &sc->wdc_channel.ctl_ioh)) {
! 141: printf("%s: couldn't map registers\n",
! 142: sc->sc_wdcdev.sc_dev.dv_xname);
! 143: }
! 144: sc->wdc_channel.data32iot = sc->wdc_channel.cmd_iot;
! 145: sc->wdc_channel.data32ioh = sc->wdc_channel.cmd_ioh;
! 146:
! 147: sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
! 148: IPL_BIO, wdcintr, &sc->wdc_channel, sc->sc_wdcdev.sc_dev.dv_xname);
! 149:
! 150: if (ia->ia_drq != DRQUNK) {
! 151: #if NISADMA > 0
! 152: sc->sc_drq = ia->ia_drq;
! 153:
! 154: sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA;
! 155: sc->sc_wdcdev.dma_arg = sc;
! 156: sc->sc_wdcdev.dma_init = wdc_isa_dma_init;
! 157: sc->sc_wdcdev.dma_start = wdc_isa_dma_start;
! 158: sc->sc_wdcdev.dma_finish = wdc_isa_dma_finish;
! 159: wdc_isa_dma_setup(sc);
! 160: #else /* NISADMA > 0 */
! 161: printf("%s: ignoring drq, isa dma not supported",
! 162: sc->sc_wdcdev.sc_dev.dv_xname);
! 163: #endif /* NISADMA > 0 */
! 164: }
! 165: sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_PREATA;
! 166: if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_32)
! 167: sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA32;
! 168: sc->sc_wdcdev.PIO_cap = 0;
! 169: sc->wdc_chanptr = &sc->wdc_channel;
! 170: sc->sc_wdcdev.channels = &sc->wdc_chanptr;
! 171: sc->sc_wdcdev.nchannels = 1;
! 172: sc->wdc_channel.channel = 0;
! 173: sc->wdc_channel.wdc = &sc->sc_wdcdev;
! 174: sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue),
! 175: M_DEVBUF, M_NOWAIT);
! 176: if (sc->wdc_channel.ch_queue == NULL) {
! 177: printf("%s: can't allocate memory for command queue",
! 178: sc->sc_wdcdev.sc_dev.dv_xname);
! 179: return;
! 180: }
! 181: wdcattach(&sc->wdc_channel);
! 182: wdc_print_current_modes(&sc->wdc_channel);
! 183: }
! 184:
! 185: #if NISADMA > 0
! 186: static void
! 187: wdc_isa_dma_setup(struct wdc_isa_softc *sc)
! 188: {
! 189: if (isa_dmamap_create(sc->sc_isa, sc->sc_drq,
! 190: MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
! 191: printf("%s: can't create map for drq %d\n",
! 192: sc->sc_wdcdev.sc_dev.dv_xname, sc->sc_drq);
! 193: sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA;
! 194: }
! 195: }
! 196:
! 197: static int
! 198: wdc_isa_dma_init(void *v, int channel, int drive, void *databuf, size_t datalen,
! 199: int read)
! 200: {
! 201: struct wdc_isa_softc *sc = v;
! 202:
! 203: isa_dmastart(sc->sc_isa, sc->sc_drq, databuf, datalen, NULL,
! 204: (read ? DMAMODE_READ : DMAMODE_WRITE),
! 205: BUS_DMA_NOWAIT);
! 206:
! 207: return 0;
! 208: }
! 209:
! 210: static void
! 211: wdc_isa_dma_start(void *v, int channel, int drive)
! 212: {
! 213: /* nothing to do */
! 214: }
! 215:
! 216: static int
! 217: wdc_isa_dma_finish(void *v, int channel, int drive, int force)
! 218: {
! 219: struct wdc_isa_softc *sc = v;
! 220:
! 221: isa_dmadone(sc->sc_isa, sc->sc_drq);
! 222:
! 223: return 0;
! 224: }
! 225: #endif /* NISADMA > 0 */
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