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siside.c revision 1.2
      1 /*	$NetBSD: siside.c,v 1.2 2003/10/11 17:40:15 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1999, 2000, 2001 Manuel Bouyer.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Manuel Bouyer.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 
     35 #include <dev/pci/pcivar.h>
     36 #include <dev/pci/pcidevs.h>
     37 #include <dev/pci/pciidereg.h>
     38 #include <dev/pci/pciidevar.h>
     39 #include <dev/pci/pciide_sis_reg.h>
     40 
     41 static void sis_chip_map(struct pciide_softc *, struct pci_attach_args *);
     42 static void sis_setup_channel(struct channel_softc *);
     43 static void sis96x_setup_channel(struct channel_softc *);
     44 
     45 static int  sis_hostbr_match(struct pci_attach_args *);
     46 static int  sis_south_match(struct pci_attach_args *);
     47 
     48 static int  siside_match(struct device *, struct cfdata *, void *);
     49 static void siside_attach(struct device *, struct device *, void *);
     50 
     51 CFATTACH_DECL(siside, sizeof(struct pciide_softc),
     52     siside_match, siside_attach, NULL, NULL);
     53 
     54 static const struct pciide_product_desc pciide_sis_products[] =  {
     55 	{ PCI_PRODUCT_SIS_5597_IDE,
     56 	  0,
     57 	  NULL,
     58 	  sis_chip_map,
     59 	},
     60 	{ 0,
     61 	  0,
     62 	  NULL,
     63 	  NULL
     64 	}
     65 };
     66 
     67 static int
     68 siside_match(struct device *parent, struct cfdata *match, void *aux)
     69 {
     70 	struct pci_attach_args *pa = aux;
     71 
     72 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIS) {
     73 		if (pciide_lookup_product(pa->pa_id, pciide_sis_products))
     74 			return (2);
     75 	}
     76 	return (0);
     77 }
     78 
     79 static void
     80 siside_attach(struct device *parent, struct device *self, void *aux)
     81 {
     82 	struct pci_attach_args *pa = aux;
     83 	struct pciide_softc *sc = (struct pciide_softc *)self;
     84 
     85 	pciide_common_attach(sc, pa,
     86 	    pciide_lookup_product(pa->pa_id, pciide_sis_products));
     87 
     88 }
     89 
     90 static struct sis_hostbr_type {
     91 	u_int16_t id;
     92 	u_int8_t rev;
     93 	u_int8_t udma_mode;
     94 	char *name;
     95 	u_int8_t type;
     96 #define SIS_TYPE_NOUDMA	0
     97 #define SIS_TYPE_66	1
     98 #define SIS_TYPE_100OLD	2
     99 #define SIS_TYPE_100NEW 3
    100 #define SIS_TYPE_133OLD 4
    101 #define SIS_TYPE_133NEW 5
    102 #define SIS_TYPE_SOUTH	6
    103 } sis_hostbr_type[] = {
    104 	/* Most infos here are from sos (at) freebsd.org */
    105 	{PCI_PRODUCT_SIS_530HB, 0x00, 4, "530", SIS_TYPE_66},
    106 #if 0
    107 	/*
    108 	 * controllers associated to a rev 0x2 530 Host to PCI Bridge
    109 	 * have problems with UDMA (info provided by Christos)
    110 	 */
    111 	{PCI_PRODUCT_SIS_530HB, 0x02, 0, "530 (buggy)", SIS_TYPE_NOUDMA},
    112 #endif
    113 	{PCI_PRODUCT_SIS_540HB, 0x00, 4, "540", SIS_TYPE_66},
    114 	{PCI_PRODUCT_SIS_550HB, 0x00, 4, "550", SIS_TYPE_66},
    115 	{PCI_PRODUCT_SIS_620,   0x00, 4, "620", SIS_TYPE_66},
    116 	{PCI_PRODUCT_SIS_630,   0x00, 4, "630", SIS_TYPE_66},
    117 	{PCI_PRODUCT_SIS_630,   0x30, 5, "630S", SIS_TYPE_100NEW},
    118 	{PCI_PRODUCT_SIS_633,   0x00, 5, "633", SIS_TYPE_100NEW},
    119 	{PCI_PRODUCT_SIS_635,   0x00, 5, "635", SIS_TYPE_100NEW},
    120 	{PCI_PRODUCT_SIS_640,   0x00, 4, "640", SIS_TYPE_SOUTH},
    121 	{PCI_PRODUCT_SIS_645,   0x00, 6, "645", SIS_TYPE_SOUTH},
    122 	{PCI_PRODUCT_SIS_646,   0x00, 6, "645DX", SIS_TYPE_SOUTH},
    123 	{PCI_PRODUCT_SIS_648,   0x00, 6, "648", SIS_TYPE_SOUTH},
    124 	{PCI_PRODUCT_SIS_650,   0x00, 6, "650", SIS_TYPE_SOUTH},
    125 	{PCI_PRODUCT_SIS_651,   0x00, 6, "651", SIS_TYPE_SOUTH},
    126 	{PCI_PRODUCT_SIS_652,   0x00, 6, "652", SIS_TYPE_SOUTH},
    127 	{PCI_PRODUCT_SIS_655,   0x00, 6, "655", SIS_TYPE_SOUTH},
    128 	{PCI_PRODUCT_SIS_658,   0x00, 6, "658", SIS_TYPE_SOUTH},
    129 	{PCI_PRODUCT_SIS_730,   0x00, 5, "730", SIS_TYPE_100OLD},
    130 	{PCI_PRODUCT_SIS_733,   0x00, 5, "733", SIS_TYPE_100NEW},
    131 	{PCI_PRODUCT_SIS_735,   0x00, 5, "735", SIS_TYPE_100NEW},
    132 	{PCI_PRODUCT_SIS_740,   0x00, 5, "740", SIS_TYPE_SOUTH},
    133 	{PCI_PRODUCT_SIS_745,   0x00, 5, "745", SIS_TYPE_100NEW},
    134 	{PCI_PRODUCT_SIS_746,   0x00, 6, "746", SIS_TYPE_SOUTH},
    135 	{PCI_PRODUCT_SIS_748,   0x00, 6, "748", SIS_TYPE_SOUTH},
    136 	{PCI_PRODUCT_SIS_750,   0x00, 6, "750", SIS_TYPE_SOUTH},
    137 	{PCI_PRODUCT_SIS_751,   0x00, 6, "751", SIS_TYPE_SOUTH},
    138 	{PCI_PRODUCT_SIS_752,   0x00, 6, "752", SIS_TYPE_SOUTH},
    139 	{PCI_PRODUCT_SIS_755,   0x00, 6, "755", SIS_TYPE_SOUTH},
    140 	/*
    141 	 * From sos (at) freebsd.org: the 0x961 ID will never be found in real world
    142 	 * {PCI_PRODUCT_SIS_961,   0x00, 6, "961", SIS_TYPE_133NEW},
    143 	 */
    144 	{PCI_PRODUCT_SIS_962,   0x00, 6, "962", SIS_TYPE_133NEW},
    145 	{PCI_PRODUCT_SIS_963,   0x00, 6, "963", SIS_TYPE_133NEW},
    146 };
    147 
    148 static struct sis_hostbr_type *sis_hostbr_type_match;
    149 
    150 static int
    151 sis_hostbr_match(struct pci_attach_args *pa)
    152 {
    153 	int i;
    154 
    155 	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SIS)
    156 		return 0;
    157 	sis_hostbr_type_match = NULL;
    158 	for (i = 0;
    159 	    i < sizeof(sis_hostbr_type) / sizeof(sis_hostbr_type[0]);
    160 	    i++) {
    161 		if (PCI_PRODUCT(pa->pa_id) == sis_hostbr_type[i].id &&
    162 		    PCI_REVISION(pa->pa_class) >= sis_hostbr_type[i].rev)
    163 			sis_hostbr_type_match = &sis_hostbr_type[i];
    164 	}
    165 	return (sis_hostbr_type_match != NULL);
    166 }
    167 
    168 static int
    169 sis_south_match(struct pci_attach_args *pa)
    170 {
    171 
    172 	return (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIS &&
    173 		PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SIS_85C503 &&
    174 		PCI_REVISION(pa->pa_class) >= 0x10);
    175 }
    176 
    177 static void
    178 sis_chip_map(struct pciide_softc *sc, struct pci_attach_args *pa)
    179 {
    180 	struct pciide_channel *cp;
    181 	int channel;
    182 	u_int8_t sis_ctr0 = pciide_pci_read(sc->sc_pc, sc->sc_tag, SIS_CTRL0);
    183 	pcireg_t interface = PCI_INTERFACE(pa->pa_class);
    184 	pcireg_t rev = PCI_REVISION(pa->pa_class);
    185 	bus_size_t cmdsize, ctlsize;
    186 
    187 	if (pciide_chipen(sc, pa) == 0)
    188 		return;
    189 
    190 	aprint_normal("%s: Silicon Integrated System ",
    191 	    sc->sc_wdcdev.sc_dev.dv_xname);
    192 	pci_find_device(NULL, sis_hostbr_match);
    193 	if (sis_hostbr_type_match) {
    194 		if (sis_hostbr_type_match->type == SIS_TYPE_SOUTH) {
    195 			pciide_pci_write(sc->sc_pc, sc->sc_tag, SIS_REG_57,
    196 			    pciide_pci_read(sc->sc_pc, sc->sc_tag,
    197 			    SIS_REG_57) & 0x7f);
    198 			if (PCI_PRODUCT(pci_conf_read(sc->sc_pc, sc->sc_tag,
    199 			    PCI_ID_REG)) == SIS_PRODUCT_5518) {
    200 				aprint_normal("96X UDMA%d",
    201 				    sis_hostbr_type_match->udma_mode);
    202 				sc->sis_type = SIS_TYPE_133NEW;
    203 				sc->sc_wdcdev.UDMA_cap =
    204 			    	    sis_hostbr_type_match->udma_mode;
    205 			} else {
    206 				if (pci_find_device(NULL, sis_south_match)) {
    207 					sc->sis_type = SIS_TYPE_133OLD;
    208 					sc->sc_wdcdev.UDMA_cap =
    209 				    	    sis_hostbr_type_match->udma_mode;
    210 				} else {
    211 					sc->sis_type = SIS_TYPE_100NEW;
    212 					sc->sc_wdcdev.UDMA_cap =
    213 					    sis_hostbr_type_match->udma_mode;
    214 				}
    215 			}
    216 		} else {
    217 			sc->sis_type = sis_hostbr_type_match->type;
    218 			sc->sc_wdcdev.UDMA_cap =
    219 		    	    sis_hostbr_type_match->udma_mode;
    220 		}
    221 		aprint_normal(sis_hostbr_type_match->name);
    222 	} else {
    223 		aprint_normal("5597/5598");
    224 		if (rev >= 0xd0) {
    225 			sc->sc_wdcdev.UDMA_cap = 2;
    226 			sc->sis_type = SIS_TYPE_66;
    227 		} else {
    228 			sc->sc_wdcdev.UDMA_cap = 0;
    229 			sc->sis_type = SIS_TYPE_NOUDMA;
    230 		}
    231 	}
    232 	aprint_normal(" IDE controller (rev. 0x%02x)\n",
    233 	    PCI_REVISION(pa->pa_class));
    234 	aprint_normal("%s: bus-master DMA support present",
    235 	    sc->sc_wdcdev.sc_dev.dv_xname);
    236 	pciide_mapreg_dma(sc, pa);
    237 	aprint_normal("\n");
    238 
    239 	sc->sc_wdcdev.cap = WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32 |
    240 	    WDC_CAPABILITY_MODE;
    241 	if (sc->sc_dma_ok) {
    242 		sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA | WDC_CAPABILITY_IRQACK;
    243 		sc->sc_wdcdev.irqack = pciide_irqack;
    244 		if (sc->sis_type >= SIS_TYPE_66)
    245 			sc->sc_wdcdev.cap |= WDC_CAPABILITY_UDMA;
    246 	}
    247 
    248 	sc->sc_wdcdev.PIO_cap = 4;
    249 	sc->sc_wdcdev.DMA_cap = 2;
    250 
    251 	sc->sc_wdcdev.channels = sc->wdc_chanarray;
    252 	sc->sc_wdcdev.nchannels = PCIIDE_NUM_CHANNELS;
    253 	switch(sc->sis_type) {
    254 	case SIS_TYPE_NOUDMA:
    255 	case SIS_TYPE_66:
    256 	case SIS_TYPE_100OLD:
    257 		sc->sc_wdcdev.set_modes = sis_setup_channel;
    258 		pciide_pci_write(sc->sc_pc, sc->sc_tag, SIS_MISC,
    259 		    pciide_pci_read(sc->sc_pc, sc->sc_tag, SIS_MISC) |
    260 		    SIS_MISC_TIM_SEL | SIS_MISC_FIFO_SIZE | SIS_MISC_GTC);
    261 		break;
    262 	case SIS_TYPE_100NEW:
    263 	case SIS_TYPE_133OLD:
    264 		sc->sc_wdcdev.set_modes = sis_setup_channel;
    265 		pciide_pci_write(sc->sc_pc, sc->sc_tag, SIS_REG_49,
    266 		    pciide_pci_read(sc->sc_pc, sc->sc_tag, SIS_REG_49) | 0x01);
    267 		break;
    268 	case SIS_TYPE_133NEW:
    269 		sc->sc_wdcdev.set_modes = sis96x_setup_channel;
    270 		pciide_pci_write(sc->sc_pc, sc->sc_tag, SIS_REG_50,
    271 		    pciide_pci_read(sc->sc_pc, sc->sc_tag, SIS_REG_50) & 0xf7);
    272 		pciide_pci_write(sc->sc_pc, sc->sc_tag, SIS_REG_52,
    273 		    pciide_pci_read(sc->sc_pc, sc->sc_tag, SIS_REG_52) & 0xf7);
    274 		break;
    275 	}
    276 
    277 
    278 	for (channel = 0; channel < sc->sc_wdcdev.nchannels; channel++) {
    279 		cp = &sc->pciide_channels[channel];
    280 		if (pciide_chansetup(sc, channel, interface) == 0)
    281 			continue;
    282 		if ((channel == 0 && (sis_ctr0 & SIS_CTRL0_CHAN0_EN) == 0) ||
    283 		    (channel == 1 && (sis_ctr0 & SIS_CTRL0_CHAN1_EN) == 0)) {
    284 			aprint_normal("%s: %s channel ignored (disabled)\n",
    285 			    sc->sc_wdcdev.sc_dev.dv_xname, cp->name);
    286 			cp->wdc_channel.ch_flags |= WDCF_DISABLED;
    287 			continue;
    288 		}
    289 		pciide_mapchan(pa, cp, interface, &cmdsize, &ctlsize,
    290 		    pciide_pci_intr);
    291 	}
    292 }
    293 
    294 static void
    295 sis96x_setup_channel(struct channel_softc *chp)
    296 {
    297 	struct ata_drive_datas *drvp;
    298 	int drive;
    299 	u_int32_t sis_tim;
    300 	u_int32_t idedma_ctl;
    301 	int regtim;
    302 	struct pciide_channel *cp = (struct pciide_channel*)chp;
    303 	struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.wdc;
    304 
    305 	sis_tim = 0;
    306 	idedma_ctl = 0;
    307 	/* setup DMA if needed */
    308 	pciide_channel_dma_setup(cp);
    309 
    310 	for (drive = 0; drive < 2; drive++) {
    311 		regtim = SIS_TIM133(
    312 		    pciide_pci_read(sc->sc_pc, sc->sc_tag, SIS_REG_57),
    313 		    chp->channel, drive);
    314 		drvp = &chp->ch_drive[drive];
    315 		/* If no drive, skip */
    316 		if ((drvp->drive_flags & DRIVE) == 0)
    317 			continue;
    318 		/* add timing values, setup DMA if needed */
    319 		if (drvp->drive_flags & DRIVE_UDMA) {
    320 			/* use Ultra/DMA */
    321 			drvp->drive_flags &= ~DRIVE_DMA;
    322 			if (pciide_pci_read(sc->sc_pc, sc->sc_tag,
    323 			    SIS96x_REG_CBL(chp->channel)) & SIS96x_REG_CBL_33) {
    324 				if (drvp->UDMA_mode > 2)
    325 					drvp->UDMA_mode = 2;
    326 			}
    327 			sis_tim |= sis_udma133new_tim[drvp->UDMA_mode];
    328 			sis_tim |= sis_pio133new_tim[drvp->PIO_mode];
    329 			idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
    330 		} else if (drvp->drive_flags & DRIVE_DMA) {
    331 			/*
    332 			 * use Multiword DMA
    333 			 * Timings will be used for both PIO and DMA,
    334 			 * so adjust DMA mode if needed
    335 			 */
    336 			if (drvp->PIO_mode > (drvp->DMA_mode + 2))
    337 				drvp->PIO_mode = drvp->DMA_mode + 2;
    338 			if (drvp->DMA_mode + 2 > (drvp->PIO_mode))
    339 				drvp->DMA_mode = (drvp->PIO_mode > 2) ?
    340 				    drvp->PIO_mode - 2 : 0;
    341 			sis_tim |= sis_dma133new_tim[drvp->DMA_mode];
    342 			idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
    343 		} else {
    344 			sis_tim |= sis_pio133new_tim[drvp->PIO_mode];
    345 		}
    346 		WDCDEBUG_PRINT(("sis96x_setup_channel: new timings reg for "
    347 		    "channel %d drive %d: 0x%x (reg 0x%x)\n",
    348 		    chp->channel, drive, sis_tim, regtim), DEBUG_PROBE);
    349 		pci_conf_write(sc->sc_pc, sc->sc_tag, regtim, sis_tim);
    350 	}
    351 	if (idedma_ctl != 0) {
    352 		/* Add software bits in status register */
    353 		bus_space_write_1(sc->sc_dma_iot, sc->sc_dma_ioh,
    354 		    IDEDMA_CTL+ (IDEDMA_SCH_OFFSET * chp->channel),
    355 		    idedma_ctl);
    356 	}
    357 }
    358 
    359 static void
    360 sis_setup_channel(struct channel_softc *chp)
    361 {
    362 	struct ata_drive_datas *drvp;
    363 	int drive;
    364 	u_int32_t sis_tim;
    365 	u_int32_t idedma_ctl;
    366 	struct pciide_channel *cp = (struct pciide_channel*)chp;
    367 	struct pciide_softc *sc = (struct pciide_softc *)cp->wdc_channel.wdc;
    368 
    369 	WDCDEBUG_PRINT(("sis_setup_channel: old timings reg for "
    370 	    "channel %d 0x%x\n", chp->channel,
    371 	    pci_conf_read(sc->sc_pc, sc->sc_tag, SIS_TIM(chp->channel))),
    372 	    DEBUG_PROBE);
    373 	sis_tim = 0;
    374 	idedma_ctl = 0;
    375 	/* setup DMA if needed */
    376 	pciide_channel_dma_setup(cp);
    377 
    378 	for (drive = 0; drive < 2; drive++) {
    379 		drvp = &chp->ch_drive[drive];
    380 		/* If no drive, skip */
    381 		if ((drvp->drive_flags & DRIVE) == 0)
    382 			continue;
    383 		/* add timing values, setup DMA if needed */
    384 		if ((drvp->drive_flags & DRIVE_DMA) == 0 &&
    385 		    (drvp->drive_flags & DRIVE_UDMA) == 0)
    386 			goto pio;
    387 
    388 		if (drvp->drive_flags & DRIVE_UDMA) {
    389 			/* use Ultra/DMA */
    390 			drvp->drive_flags &= ~DRIVE_DMA;
    391 			if (pciide_pci_read(sc->sc_pc, sc->sc_tag,
    392 			    SIS_REG_CBL) & SIS_REG_CBL_33(chp->channel)) {
    393 				if (drvp->UDMA_mode > 2)
    394 					drvp->UDMA_mode = 2;
    395 			}
    396 			switch (sc->sis_type) {
    397 			case SIS_TYPE_66:
    398 			case SIS_TYPE_100OLD:
    399 				sis_tim |= sis_udma66_tim[drvp->UDMA_mode] <<
    400 				    SIS_TIM66_UDMA_TIME_OFF(drive);
    401 				break;
    402 			case SIS_TYPE_100NEW:
    403 				sis_tim |=
    404 				    sis_udma100new_tim[drvp->UDMA_mode] <<
    405 				    SIS_TIM100_UDMA_TIME_OFF(drive);
    406 			case SIS_TYPE_133OLD:
    407 				sis_tim |=
    408 				    sis_udma133old_tim[drvp->UDMA_mode] <<
    409 				    SIS_TIM100_UDMA_TIME_OFF(drive);
    410 				break;
    411 			default:
    412 				aprint_error("unknown SiS IDE type %d\n",
    413 				    sc->sis_type);
    414 			}
    415 		} else {
    416 			/*
    417 			 * use Multiword DMA
    418 			 * Timings will be used for both PIO and DMA,
    419 			 * so adjust DMA mode if needed
    420 			 */
    421 			if (drvp->PIO_mode > (drvp->DMA_mode + 2))
    422 				drvp->PIO_mode = drvp->DMA_mode + 2;
    423 			if (drvp->DMA_mode + 2 > (drvp->PIO_mode))
    424 				drvp->DMA_mode = (drvp->PIO_mode > 2) ?
    425 				    drvp->PIO_mode - 2 : 0;
    426 			if (drvp->DMA_mode == 0)
    427 				drvp->PIO_mode = 0;
    428 		}
    429 		idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
    430 pio:		switch (sc->sis_type) {
    431 		case SIS_TYPE_NOUDMA:
    432 		case SIS_TYPE_66:
    433 		case SIS_TYPE_100OLD:
    434 			sis_tim |= sis_pio_act[drvp->PIO_mode] <<
    435 			    SIS_TIM66_ACT_OFF(drive);
    436 			sis_tim |= sis_pio_rec[drvp->PIO_mode] <<
    437 			    SIS_TIM66_REC_OFF(drive);
    438 			break;
    439 		case SIS_TYPE_100NEW:
    440 		case SIS_TYPE_133OLD:
    441 			sis_tim |= sis_pio_act[drvp->PIO_mode] <<
    442 			    SIS_TIM100_ACT_OFF(drive);
    443 			sis_tim |= sis_pio_rec[drvp->PIO_mode] <<
    444 			    SIS_TIM100_REC_OFF(drive);
    445 			break;
    446 		default:
    447 			aprint_error("unknown SiS IDE type %d\n",
    448 			    sc->sis_type);
    449 		}
    450 	}
    451 	WDCDEBUG_PRINT(("sis_setup_channel: new timings reg for "
    452 	    "channel %d 0x%x\n", chp->channel, sis_tim), DEBUG_PROBE);
    453 	pci_conf_write(sc->sc_pc, sc->sc_tag, SIS_TIM(chp->channel), sis_tim);
    454 	if (idedma_ctl != 0) {
    455 		/* Add software bits in status register */
    456 		bus_space_write_1(sc->sc_dma_iot, sc->sc_dma_ioh,
    457 		    IDEDMA_CTL+ (IDEDMA_SCH_OFFSET * chp->channel),
    458 		    idedma_ctl);
    459 	}
    460 }
    461