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kauai.c revision 1.17.12.3
      1  1.17.12.3      yamt /*	$NetBSD: kauai.c,v 1.17.12.3 2007/10/27 11:27:03 yamt Exp $	*/
      2        1.1  hamajima 
      3        1.1  hamajima /*-
      4        1.1  hamajima  * Copyright (c) 2003 Tsubai Masanari.  All rights reserved.
      5        1.1  hamajima  *
      6        1.1  hamajima  * Redistribution and use in source and binary forms, with or without
      7        1.1  hamajima  * modification, are permitted provided that the following conditions
      8        1.1  hamajima  * are met:
      9        1.1  hamajima  * 1. Redistributions of source code must retain the above copyright
     10        1.1  hamajima  *    notice, this list of conditions and the following disclaimer.
     11        1.1  hamajima  * 2. Redistributions in binary form must reproduce the above copyright
     12        1.1  hamajima  *    notice, this list of conditions and the following disclaimer in the
     13        1.1  hamajima  *    documentation and/or other materials provided with the distribution.
     14        1.1  hamajima  * 3. The name of the author may not be used to endorse or promote products
     15        1.1  hamajima  *    derived from this software without specific prior written permission.
     16        1.1  hamajima  *
     17        1.1  hamajima  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18        1.1  hamajima  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19        1.1  hamajima  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20        1.1  hamajima  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21        1.1  hamajima  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22        1.1  hamajima  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23        1.1  hamajima  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24        1.1  hamajima  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25        1.1  hamajima  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26        1.1  hamajima  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27        1.1  hamajima  */
     28        1.2     lukem 
     29        1.2     lukem #include <sys/cdefs.h>
     30  1.17.12.3      yamt __KERNEL_RCSID(0, "$NetBSD: kauai.c,v 1.17.12.3 2007/10/27 11:27:03 yamt Exp $");
     31        1.1  hamajima 
     32        1.1  hamajima #include <sys/param.h>
     33        1.1  hamajima #include <sys/systm.h>
     34        1.1  hamajima #include <sys/device.h>
     35        1.1  hamajima #include <sys/malloc.h>
     36        1.1  hamajima 
     37        1.1  hamajima #include <uvm/uvm_extern.h>
     38        1.1  hamajima 
     39        1.1  hamajima #include <machine/bus.h>
     40  1.17.12.3      yamt #include <machine/pio.h>
     41        1.1  hamajima 
     42        1.1  hamajima #include <dev/ata/atareg.h>
     43        1.1  hamajima #include <dev/ata/atavar.h>
     44        1.1  hamajima #include <dev/ic/wdcvar.h>
     45        1.1  hamajima 
     46        1.1  hamajima #include <dev/ofw/openfirm.h>
     47        1.1  hamajima 
     48        1.1  hamajima #include <dev/pci/pcivar.h>
     49        1.1  hamajima #include <dev/pci/pcireg.h>
     50        1.1  hamajima #include <dev/pci/pcidevs.h>
     51        1.1  hamajima 
     52        1.1  hamajima #include <macppc/dev/dbdma.h>
     53        1.1  hamajima 
     54        1.1  hamajima #define WDC_REG_NPORTS		8
     55        1.1  hamajima #define WDC_AUXREG_OFFSET	0x16
     56  1.17.12.3      yamt #define WDC_AUXREG_NPORTS	1
     57        1.1  hamajima 
     58        1.1  hamajima #define PIO_CONFIG_REG (0x200 >> 4)	/* PIO and DMA access timing */
     59        1.1  hamajima #define DMA_CONFIG_REG (0x210 >> 4)	/* UDMA access timing */
     60        1.1  hamajima 
     61        1.1  hamajima struct kauai_softc {
     62        1.1  hamajima 	struct wdc_softc sc_wdcdev;
     63       1.15   thorpej 	struct ata_channel *sc_chanptr;
     64       1.15   thorpej 	struct ata_channel sc_channel;
     65       1.15   thorpej 	struct wdc_regs sc_wdc_regs;
     66       1.15   thorpej 	struct ata_queue sc_queue;
     67        1.1  hamajima 	dbdma_regmap_t *sc_dmareg;
     68        1.1  hamajima 	dbdma_command_t	*sc_dmacmd;
     69        1.1  hamajima 	u_int sc_piotiming_r[2];
     70        1.1  hamajima 	u_int sc_piotiming_w[2];
     71        1.1  hamajima 	u_int sc_dmatiming_r[2];
     72        1.1  hamajima 	u_int sc_dmatiming_w[2];
     73        1.1  hamajima 	void (*sc_calc_timing)(struct kauai_softc *, int);
     74        1.1  hamajima };
     75        1.1  hamajima 
     76        1.1  hamajima int kauai_match __P((struct device *, struct cfdata *, void *));
     77        1.1  hamajima void kauai_attach __P((struct device *, struct device *, void *));
     78        1.1  hamajima int kauai_dma_init __P((void *, int, int, void *, size_t, int));
     79        1.1  hamajima void kauai_dma_start __P((void *, int, int));
     80        1.1  hamajima int kauai_dma_finish __P((void *, int, int, int));
     81       1.15   thorpej void kauai_set_modes __P((struct ata_channel *));
     82        1.1  hamajima static void calc_timing_kauai __P((struct kauai_softc *, int));
     83        1.1  hamajima static int getnodebypci(pci_chipset_tag_t, pcitag_t);
     84        1.1  hamajima 
     85        1.1  hamajima CFATTACH_DECL(kauai, sizeof(struct kauai_softc),
     86        1.1  hamajima     kauai_match, kauai_attach, NULL, wdcactivate);
     87        1.1  hamajima 
     88        1.1  hamajima int
     89        1.1  hamajima kauai_match(parent, match, aux)
     90        1.1  hamajima 	struct device *parent;
     91        1.1  hamajima 	struct cfdata *match;
     92        1.1  hamajima 	void *aux;
     93        1.1  hamajima {
     94        1.1  hamajima 	struct pci_attach_args *pa = aux;
     95        1.1  hamajima 
     96  1.17.12.2      yamt 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE) {
     97  1.17.12.2      yamt 		switch (PCI_PRODUCT(pa->pa_id)) {
     98  1.17.12.2      yamt 		case PCI_PRODUCT_APPLE_KAUAI:
     99  1.17.12.2      yamt 		case PCI_PRODUCT_APPLE_UNINORTH_ATA:
    100  1.17.12.2      yamt 		case PCI_PRODUCT_APPLE_INTREPID2_ATA:
    101  1.17.12.2      yamt 		    return 5;
    102  1.17.12.2      yamt 		}
    103  1.17.12.2      yamt 	}
    104        1.1  hamajima 
    105        1.1  hamajima 	return 0;
    106        1.1  hamajima }
    107        1.1  hamajima 
    108        1.1  hamajima void
    109        1.1  hamajima kauai_attach(parent, self, aux)
    110        1.1  hamajima 	struct device *parent, *self;
    111        1.1  hamajima 	void *aux;
    112        1.1  hamajima {
    113        1.1  hamajima 	struct kauai_softc *sc = (void *)self;
    114        1.1  hamajima 	struct pci_attach_args *pa = aux;
    115       1.15   thorpej 	struct ata_channel *chp = &sc->sc_channel;
    116       1.15   thorpej 	struct wdc_regs *wdr;
    117        1.1  hamajima 	pci_intr_handle_t ih;
    118        1.1  hamajima 	paddr_t regbase, dmabase;
    119        1.7    bouyer 	int node, reg[5], i;
    120        1.1  hamajima 
    121        1.1  hamajima #ifdef DIAGNOSTIC
    122        1.1  hamajima 	if ((vaddr_t)sc->sc_dmacmd & 0x0f) {
    123        1.1  hamajima 		printf(": bad dbdma alignment\n");
    124        1.1  hamajima 		return;
    125        1.1  hamajima 	}
    126        1.1  hamajima #endif
    127        1.1  hamajima 
    128        1.1  hamajima 	node = getnodebypci(pa->pa_pc, pa->pa_tag);
    129        1.1  hamajima 	if (node == 0) {
    130  1.17.12.3      yamt 		printf(": cannot find kauai node\n");
    131        1.1  hamajima 		return;
    132        1.1  hamajima 	}
    133        1.1  hamajima 
    134        1.1  hamajima 	if (OF_getprop(node, "assigned-addresses", reg, sizeof reg) < 12) {
    135        1.1  hamajima 		printf(": cannot get address property\n");
    136        1.1  hamajima 		return;
    137        1.1  hamajima 	}
    138        1.1  hamajima 	regbase = reg[2] + 0x2000;
    139        1.1  hamajima 	dmabase = reg[2] + 0x1000;
    140        1.1  hamajima 
    141        1.1  hamajima 	/*
    142        1.1  hamajima 	 * XXX PCI_INTERRUPT_REG seems to be wired to 0.
    143        1.1  hamajima 	 * XXX So use fixed intrpin and intrline values.
    144        1.1  hamajima 	 */
    145        1.1  hamajima 	if (pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_INTERRUPT_REG) == 0) {
    146        1.1  hamajima 		pa->pa_intrpin = 1;
    147        1.1  hamajima 		pa->pa_intrline = 39;
    148        1.1  hamajima 	}
    149        1.1  hamajima 
    150        1.1  hamajima 	if (pci_intr_map(pa, &ih)) {
    151        1.1  hamajima 		printf(": unable to map interrupt\n");
    152        1.1  hamajima 		return;
    153        1.1  hamajima 	}
    154        1.1  hamajima 	printf(": interrupting at %s\n", pci_intr_string(pa->pa_pc, ih));
    155        1.1  hamajima 
    156       1.15   thorpej 	sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;
    157        1.1  hamajima 
    158  1.17.12.3      yamt 	wdr->cmd_iot = wdr->ctl_iot = pa->pa_memt;
    159       1.15   thorpej 
    160  1.17.12.3      yamt 	if (bus_space_map(wdr->cmd_iot, regbase, WDC_REG_NPORTS << 4, 0,
    161       1.15   thorpej 	    &wdr->cmd_baseioh) ||
    162       1.15   thorpej 	    bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
    163  1.17.12.3      yamt 			WDC_AUXREG_OFFSET << 4, 1, &wdr->ctl_ioh)) {
    164        1.1  hamajima 		printf("%s: couldn't map registers\n", self->dv_xname);
    165        1.1  hamajima 		return;
    166        1.1  hamajima 	}
    167        1.7    bouyer 	for (i = 0; i < WDC_NREG; i++) {
    168  1.17.12.3      yamt 		if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh, i << 4,
    169       1.15   thorpej 		    i == 0 ? 4 : 1, &wdr->cmd_iohs[i]) != 0) {
    170       1.15   thorpej 			bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh,
    171  1.17.12.3      yamt 			    WDC_REG_NPORTS << 4);
    172        1.7    bouyer 			printf("%s: couldn't subregion registers\n",
    173       1.16   thorpej 			    sc->sc_wdcdev.sc_atac.atac_dev.dv_xname);
    174        1.7    bouyer 			return;
    175        1.7    bouyer 		}
    176        1.7    bouyer 	}
    177        1.1  hamajima 
    178        1.1  hamajima 	if (pci_intr_establish(pa->pa_pc, ih, IPL_BIO, wdcintr, chp) == NULL) {
    179        1.1  hamajima 		printf("%s: unable to establish interrupt\n", self->dv_xname);
    180        1.1  hamajima 		return;
    181        1.1  hamajima 	}
    182        1.1  hamajima 
    183        1.1  hamajima 
    184       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
    185       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
    186       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
    187       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16;
    188       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA | ATAC_CAP_UDMA;
    189       1.15   thorpej 	sc->sc_chanptr = chp;
    190       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_channels = &sc->sc_chanptr;
    191       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
    192        1.1  hamajima 	sc->sc_wdcdev.dma_arg = sc;
    193        1.1  hamajima 	sc->sc_wdcdev.dma_init = kauai_dma_init;
    194        1.1  hamajima 	sc->sc_wdcdev.dma_start = kauai_dma_start;
    195        1.1  hamajima 	sc->sc_wdcdev.dma_finish = kauai_dma_finish;
    196       1.16   thorpej 	sc->sc_wdcdev.sc_atac.atac_set_modes = kauai_set_modes;
    197        1.1  hamajima 	sc->sc_calc_timing = calc_timing_kauai;
    198        1.1  hamajima 	sc->sc_dmareg = (void *)dmabase;
    199        1.1  hamajima 
    200       1.11   thorpej 	chp->ch_channel = 0;
    201       1.16   thorpej 	chp->ch_atac = &sc->sc_wdcdev.sc_atac;
    202       1.15   thorpej 	chp->ch_queue = &sc->sc_queue;
    203  1.17.12.1      yamt 	chp->ch_ndrive = 2;
    204       1.17      manu 	wdc_init_shadow_regs(chp);
    205        1.1  hamajima 
    206        1.6    bouyer 	wdcattach(chp);
    207        1.1  hamajima }
    208        1.1  hamajima 
    209        1.1  hamajima void
    210        1.1  hamajima kauai_set_modes(chp)
    211       1.15   thorpej 	struct ata_channel *chp;
    212        1.1  hamajima {
    213       1.16   thorpej 	struct kauai_softc *sc = (void *)chp->ch_atac;
    214       1.16   thorpej 	struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp);
    215        1.1  hamajima 	struct ata_drive_datas *drvp0 = &chp->ch_drive[0];
    216        1.1  hamajima 	struct ata_drive_datas *drvp1 = &chp->ch_drive[1];
    217        1.1  hamajima 	struct ata_drive_datas *drvp;
    218        1.1  hamajima 	int drive;
    219        1.1  hamajima 
    220        1.1  hamajima 	if ((drvp0->drive_flags & DRIVE) && (drvp1->drive_flags & DRIVE)) {
    221        1.1  hamajima 		drvp0->PIO_mode = drvp1->PIO_mode =
    222        1.1  hamajima 		    min(drvp0->PIO_mode, drvp1->PIO_mode);
    223        1.1  hamajima 	}
    224        1.1  hamajima 
    225        1.1  hamajima 	for (drive = 0; drive < 2; drive++) {
    226        1.1  hamajima 		drvp = &chp->ch_drive[drive];
    227        1.1  hamajima 		if (drvp->drive_flags & DRIVE) {
    228        1.1  hamajima 			(*sc->sc_calc_timing)(sc, drive);
    229       1.15   thorpej 			bus_space_write_4(wdr->cmd_iot, wdr->cmd_baseioh,
    230        1.1  hamajima 			    PIO_CONFIG_REG, sc->sc_piotiming_r[drive]);
    231       1.15   thorpej 			bus_space_write_4(wdr->cmd_iot, wdr->cmd_baseioh,
    232        1.1  hamajima 			    DMA_CONFIG_REG, sc->sc_dmatiming_r[drive]);
    233        1.1  hamajima 		}
    234        1.1  hamajima 	}
    235        1.1  hamajima }
    236        1.1  hamajima 
    237        1.1  hamajima /*
    238        1.1  hamajima  * IDE transfer timings
    239        1.1  hamajima  */
    240        1.1  hamajima static const u_int pio_timing_kauai[] = {	/* 0xff000fff */
    241        1.1  hamajima 	0x08000a92,	/* Mode 0 */
    242        1.1  hamajima 	0x0800060f,	/*      1 */
    243        1.1  hamajima 	0x0800038b,	/*      2 */
    244        1.1  hamajima 	0x05000249,	/*      3 */
    245        1.1  hamajima 	0x04000148	/*      4 */
    246        1.1  hamajima };
    247        1.1  hamajima static const u_int dma_timing_kauai[] = {	/* 0x00fff000 */
    248        1.1  hamajima 	0x00618000,	/* Mode 0 */
    249        1.1  hamajima 	0x00209000,	/*      1 */
    250        1.1  hamajima 	0x00148000	/*      2 */
    251        1.1  hamajima };
    252        1.1  hamajima static const u_int udma_timing_kauai[] = {	/* 0x0000ffff */
    253        1.1  hamajima 	0x000070c0,	/* Mode 0 */
    254        1.1  hamajima 	0x00005d80,	/*      1 */
    255        1.1  hamajima 	0x00004a60,	/*      2 */
    256        1.1  hamajima 	0x00003a50,	/*      3 */
    257        1.1  hamajima 	0x00002a30,	/*      4 */
    258        1.1  hamajima 	0x00002921	/*      5 */
    259        1.1  hamajima };
    260        1.1  hamajima 
    261        1.1  hamajima /*
    262        1.1  hamajima  * Timing calculation for Kauai.
    263        1.1  hamajima  */
    264        1.1  hamajima void
    265        1.1  hamajima calc_timing_kauai(sc, drive)
    266        1.1  hamajima 	struct kauai_softc *sc;
    267        1.1  hamajima 	int drive;
    268        1.1  hamajima {
    269       1.15   thorpej 	struct ata_channel *chp = &sc->sc_channel;
    270        1.1  hamajima 	struct ata_drive_datas *drvp = &chp->ch_drive[drive];
    271        1.1  hamajima 	int piomode = drvp->PIO_mode;
    272        1.1  hamajima 	int dmamode = drvp->DMA_mode;
    273        1.1  hamajima 	int udmamode = drvp->UDMA_mode;
    274        1.1  hamajima 	u_int pioconf, dmaconf;
    275        1.1  hamajima 
    276        1.1  hamajima 	pioconf = pio_timing_kauai[piomode];
    277        1.1  hamajima 
    278        1.1  hamajima 	dmaconf = 0;
    279        1.1  hamajima 	if (drvp->drive_flags & DRIVE_DMA)
    280        1.1  hamajima 		dmaconf |= dma_timing_kauai[dmamode];
    281        1.1  hamajima 	if (drvp->drive_flags & DRIVE_UDMA)
    282        1.1  hamajima 		dmaconf |= udma_timing_kauai[udmamode];
    283        1.1  hamajima 
    284        1.1  hamajima 	if (drvp->drive_flags & DRIVE_UDMA)
    285        1.1  hamajima 		dmaconf |= 1;
    286        1.1  hamajima 
    287        1.1  hamajima 	sc->sc_piotiming_r[drive] = sc->sc_piotiming_w[drive] = pioconf;
    288        1.1  hamajima 	sc->sc_dmatiming_r[drive] = sc->sc_dmatiming_w[drive] = dmaconf;
    289        1.1  hamajima }
    290        1.1  hamajima 
    291        1.1  hamajima int
    292        1.1  hamajima kauai_dma_init(v, channel, drive, databuf, datalen, flags)
    293        1.1  hamajima 	void *v;
    294        1.1  hamajima 	void *databuf;
    295        1.1  hamajima 	size_t datalen;
    296        1.1  hamajima 	int flags;
    297        1.1  hamajima {
    298        1.1  hamajima 	struct kauai_softc *sc = v;
    299        1.1  hamajima 	dbdma_command_t *cmdp = sc->sc_dmacmd;
    300       1.15   thorpej 	struct ata_channel *chp = &sc->sc_channel;
    301       1.16   thorpej 	struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp);
    302        1.1  hamajima 	vaddr_t va = (vaddr_t)databuf;
    303        1.1  hamajima 	int read = flags & WDC_DMA_READ;
    304        1.1  hamajima 	int cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE;
    305        1.1  hamajima 	u_int offset;
    306        1.1  hamajima 
    307       1.15   thorpej 	bus_space_write_4(wdr->cmd_iot, wdr->cmd_baseioh, DMA_CONFIG_REG,
    308        1.1  hamajima 	    read ? sc->sc_dmatiming_r[drive] : sc->sc_dmatiming_w[drive]);
    309       1.15   thorpej 	bus_space_read_4(wdr->cmd_iot, wdr->cmd_baseioh, DMA_CONFIG_REG);
    310        1.1  hamajima 
    311        1.1  hamajima 	offset = va & PGOFSET;
    312        1.1  hamajima 
    313        1.1  hamajima 	/* if va is not page-aligned, setup the first page */
    314        1.1  hamajima 	if (offset != 0) {
    315        1.1  hamajima 		int rest = PAGE_SIZE - offset;	/* the rest of the page */
    316        1.1  hamajima 
    317        1.1  hamajima 		if (datalen > rest) {		/* if continues to next page */
    318        1.1  hamajima 			DBDMA_BUILD(cmdp, cmd, 0, rest, vtophys(va),
    319        1.1  hamajima 				DBDMA_INT_NEVER, DBDMA_WAIT_NEVER,
    320        1.1  hamajima 				DBDMA_BRANCH_NEVER);
    321        1.1  hamajima 			datalen -= rest;
    322        1.1  hamajima 			va += rest;
    323        1.1  hamajima 			cmdp++;
    324        1.1  hamajima 		}
    325        1.1  hamajima 	}
    326        1.1  hamajima 
    327        1.1  hamajima 	/* now va is page-aligned */
    328        1.1  hamajima 	while (datalen > PAGE_SIZE) {
    329        1.1  hamajima 		DBDMA_BUILD(cmdp, cmd, 0, PAGE_SIZE, vtophys(va),
    330        1.1  hamajima 			DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
    331        1.1  hamajima 		datalen -= PAGE_SIZE;
    332        1.1  hamajima 		va += PAGE_SIZE;
    333        1.1  hamajima 		cmdp++;
    334        1.1  hamajima 	}
    335        1.1  hamajima 
    336        1.1  hamajima 	/* the last page (datalen <= PAGE_SIZE here) */
    337        1.1  hamajima 	cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST;
    338        1.1  hamajima 	DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va),
    339        1.1  hamajima 		DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
    340        1.1  hamajima 	cmdp++;
    341        1.1  hamajima 
    342        1.1  hamajima 	DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0,
    343        1.1  hamajima 		DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
    344        1.1  hamajima 
    345        1.1  hamajima 	return 0;
    346        1.1  hamajima }
    347        1.1  hamajima 
    348        1.1  hamajima void
    349        1.1  hamajima kauai_dma_start(v, channel, drive)
    350        1.1  hamajima 	void *v;
    351        1.1  hamajima 	int channel, drive;
    352        1.1  hamajima {
    353        1.1  hamajima 	struct kauai_softc *sc = v;
    354        1.1  hamajima 
    355        1.1  hamajima 	dbdma_start(sc->sc_dmareg, sc->sc_dmacmd);
    356        1.1  hamajima }
    357        1.1  hamajima 
    358        1.1  hamajima int
    359        1.1  hamajima kauai_dma_finish(v, channel, drive, read)
    360        1.1  hamajima 	void *v;
    361        1.1  hamajima 	int channel, drive;
    362        1.1  hamajima 	int read;
    363        1.1  hamajima {
    364        1.1  hamajima 	struct kauai_softc *sc = v;
    365        1.1  hamajima 
    366        1.1  hamajima 	dbdma_stop(sc->sc_dmareg);
    367        1.1  hamajima 	return 0;
    368        1.1  hamajima }
    369        1.1  hamajima 
    370        1.1  hamajima /*
    371        1.1  hamajima  * Find OF-device corresponding to the PCI device.
    372        1.1  hamajima  */
    373        1.1  hamajima int
    374        1.1  hamajima getnodebypci(pc, tag)
    375        1.1  hamajima 	pci_chipset_tag_t pc;
    376        1.1  hamajima 	pcitag_t tag;
    377        1.1  hamajima {
    378        1.1  hamajima 	int bus, dev, func;
    379        1.1  hamajima 	u_int reg[5];
    380        1.1  hamajima 	int p, q;
    381        1.1  hamajima 	int l, b, d, f;
    382        1.1  hamajima 
    383        1.1  hamajima 	pci_decompose_tag(pc, tag, &bus, &dev, &func);
    384        1.1  hamajima 
    385        1.1  hamajima 	for (q = OF_peer(0); q; q = p) {
    386        1.1  hamajima 		l = OF_getprop(q, "assigned-addresses", reg, sizeof(reg));
    387        1.1  hamajima 		if (l > 4) {
    388        1.1  hamajima 			b = (reg[0] >> 16) & 0xff;
    389        1.1  hamajima 			d = (reg[0] >> 11) & 0x1f;
    390        1.1  hamajima 			f = (reg[0] >> 8) & 0x07;
    391        1.1  hamajima 
    392        1.1  hamajima 			if (b == bus && d == dev && f == func)
    393        1.1  hamajima 				return q;
    394        1.1  hamajima 		}
    395        1.1  hamajima 		if ((p = OF_child(q)))
    396        1.1  hamajima 			continue;
    397        1.1  hamajima 		while (q) {
    398        1.1  hamajima 			if ((p = OF_peer(q)))
    399        1.1  hamajima 				break;
    400        1.1  hamajima 			q = OF_parent(q);
    401        1.1  hamajima 		}
    402        1.1  hamajima 	}
    403        1.1  hamajima 	return 0;
    404        1.1  hamajima }
    405