/* $NetBSD: wdc_obio.c,v 1.2 1999/01/22 10:44:38 tsubai Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum and by Onno van der Linden. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #define WDC_REG_NPORTS 8 #define WDC_AUXREG_OFFSET 0x16 #define WDC_DEFAULT_PIO_IRQ 13 /* XXX */ #define WDC_DEFAULT_DMA_IRQ 2 /* XXX */ #define WDC_OPTIONS_DMA 0x01 /* * XXX This code currently doesn't even try to allow 32-bit data port use. */ struct wdc_obio_softc { struct wdc_softc sc_wdcdev; struct channel_softc *wdc_chanptr; struct channel_softc wdc_channel; dbdma_regmap_t *sc_dmareg; dbdma_command_t *sc_dmacmd; }; int wdc_obio_probe __P((struct device *, struct cfdata *, void *)); void wdc_obio_attach __P((struct device *, struct device *, void *)); struct cfattach wdc_obio_ca = { sizeof(struct wdc_obio_softc), wdc_obio_probe, wdc_obio_attach }; static int wdc_obio_dma_init __P((void *, int, int, void *, size_t, int)); static void wdc_obio_dma_start __P((void *, int, int, int)); static int wdc_obio_dma_finish __P((void *, int, int, int)); int wdc_obio_probe(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct confargs *ca = aux; if (strcmp(ca->ca_name, "ATA") == 0 || strcmp(ca->ca_name, "ata") == 0 || strcmp(ca->ca_name, "ata0") == 0 || strcmp(ca->ca_name, "ide") == 0) return 1; return 0; } void wdc_obio_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct wdc_obio_softc *sc = (void *)self; struct confargs *ca = aux; struct channel_softc *chp = &sc->wdc_channel; int piointr, dmaintr; int use_dma = 0; piointr = dmaintr = -1; if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_DMA) { if (ca->ca_nreg >= 16 || ca->ca_nintr == -1) use_dma = 1; /* XXX Don't work yet. */ } if (ca->ca_nintr == -1) { piointr = WDC_DEFAULT_PIO_IRQ; dmaintr = WDC_DEFAULT_DMA_IRQ; printf(" irq property not found; using %d,%d", piointr, dmaintr); } if (ca->ca_nintr >= 4 && ca->ca_nreg >= 8) { piointr = ca->ca_intr[0]; printf(" irq %d", piointr); } if (ca->ca_nintr >= 8 && use_dma) { dmaintr = ca->ca_intr[1]; printf(",%d", dmaintr); } if (piointr == -1) { printf(": couldn't get irq property\n"); return; } if (use_dma) printf(": DMA transfer"); printf("\n"); chp->cmd_iot = chp->ctl_iot = macppc_make_bus_space_tag(ca->ca_baseaddr + ca->ca_reg[0], 4); if (bus_space_map(chp->cmd_iot, 0, WDC_REG_NPORTS, 0, &chp->cmd_ioh) || bus_space_subregion(chp->cmd_iot, chp->cmd_ioh, WDC_AUXREG_OFFSET, 1, &chp->ctl_ioh)) { printf("%s: couldn't map registers\n", sc->sc_wdcdev.sc_dev.dv_xname); return; } #if 0 chp->data32iot = chp->cmd_iot; chp->data32ioh = chp->cmd_ioh; #endif intr_establish(piointr, IST_LEVEL, IPL_BIO, wdcintr, chp); if (use_dma) { if (dmaintr != -1) intr_establish(dmaintr, IST_LEVEL, IPL_BIO, wdcintr, chp); sc->sc_dmacmd = dbdma_alloc(sizeof(dbdma_command_t) * 20); sc->sc_dmareg = mapiodev(ca->ca_baseaddr + ca->ca_reg[2], ca->ca_reg[3]); sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA; } sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16; sc->sc_wdcdev.PIO_cap = 0; sc->wdc_chanptr = chp; sc->sc_wdcdev.channels = &sc->wdc_chanptr; sc->sc_wdcdev.nchannels = 1; sc->sc_wdcdev.dma_arg = sc; sc->sc_wdcdev.dma_init = wdc_obio_dma_init; sc->sc_wdcdev.dma_start = wdc_obio_dma_start; sc->sc_wdcdev.dma_finish = wdc_obio_dma_finish; chp->channel = 0; chp->wdc = &sc->sc_wdcdev; chp->ch_queue = malloc(sizeof(struct channel_queue), M_DEVBUF, M_NOWAIT); if (chp->ch_queue == NULL) { printf("%s: can't allocate memory for command queue", sc->sc_wdcdev.sc_dev.dv_xname); return; } wdcattach(chp); } static int wdc_obio_dma_init(v, channel, drive, databuf, datalen, read) void *v; void *databuf; size_t datalen; int read; { struct wdc_obio_softc *sc = v; vaddr_t va = (vaddr_t)databuf; dbdma_command_t *cmdp; u_int cmd; #ifdef DIAGNOSTIC if (va & PGOFSET) panic("wdc_obio: databuf not page aligned"); if (datalen > 65536) panic("wdc_obio: datalen too large"); #endif cmdp = sc->sc_dmacmd; cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE; while (datalen > NBPG) { DBDMA_BUILD(cmdp, cmd, 0, NBPG, vtophys(va), DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); datalen -= NBPG; va += NBPG; cmdp++; } /* the last page (datalen <= NBPG here) */ cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST; DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va), DBDMA_INT_ALWAYS, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); cmdp++; DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0, DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); return 0; } static void wdc_obio_dma_start(v, channel, drive, read) void *v; int channel, drive; { struct wdc_obio_softc *sc = v; dbdma_start(sc->sc_dmareg, sc->sc_dmacmd); } static int wdc_obio_dma_finish(v, channel, drive, read) void *v; int channel, drive; int read; { /* nothing to do */ return 0; }