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kauai.c revision 1.20.8.1
      1  1.20.8.1     joerg /*	$NetBSD: kauai.c,v 1.20.8.1 2007/10/26 15:42:47 joerg 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  1.20.8.1     joerg __KERNEL_RCSID(0, "$NetBSD: kauai.c,v 1.20.8.1 2007/10/26 15:42:47 joerg 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  1.20.8.1     joerg #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  1.20.8.1     joerg #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      1.20   aymeric 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE) {
     97      1.20   aymeric 		switch (PCI_PRODUCT(pa->pa_id)) {
     98      1.20   aymeric 		case PCI_PRODUCT_APPLE_KAUAI:
     99      1.20   aymeric 		case PCI_PRODUCT_APPLE_UNINORTH_ATA:
    100      1.20   aymeric 		case PCI_PRODUCT_APPLE_INTREPID2_ATA:
    101      1.20   aymeric 		    return 5;
    102      1.20   aymeric 		}
    103      1.20   aymeric 	}
    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  1.20.8.1     joerg 		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  1.20.8.1     joerg 	wdr->cmd_iot = wdr->ctl_iot = pa->pa_memt;
    159      1.15   thorpej 
    160  1.20.8.1     joerg 	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  1.20.8.1     joerg 			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  1.20.8.1     joerg 		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  1.20.8.1     joerg 			    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      1.19    bouyer 	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