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viaide.c revision 1.80
      1 /*	$NetBSD: viaide.c,v 1.80 2012/07/15 10:55:32 dsl 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  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  *
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: viaide.c,v 1.80 2012/07/15 10:55:32 dsl Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/systm.h>
     33 #include <sys/malloc.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_apollo_reg.h>
     40 
     41 static int	via_pcib_match(const struct pci_attach_args *);
     42 static void	via_chip_map(struct pciide_softc *,
     43 		    const struct pci_attach_args *);
     44 static void	via_mapchan(const struct pci_attach_args *,
     45 		    struct pciide_channel *,
     46 		    pcireg_t, int (*)(void *));
     47 static void	via_mapregs_compat_native(const struct pci_attach_args *,
     48 		    struct pciide_channel *);
     49 static int	via_sata_chip_map_common(struct pciide_softc *,
     50 		    const struct pci_attach_args *);
     51 static void	via_sata_chip_map(struct pciide_softc *,
     52 		    const struct pci_attach_args *, int);
     53 static void	via_sata_chip_map_6(struct pciide_softc *,
     54 		    const struct pci_attach_args *);
     55 static void	via_sata_chip_map_7(struct pciide_softc *,
     56 		    const struct pci_attach_args *);
     57 static void	via_sata_chip_map_new(struct pciide_softc *,
     58 		    const struct pci_attach_args *);
     59 static void	via_setup_channel(struct ata_channel *);
     60 
     61 static int	viaide_match(device_t, cfdata_t, void *);
     62 static void	viaide_attach(device_t, device_t, void *);
     63 static const struct pciide_product_desc *
     64 		viaide_lookup(pcireg_t);
     65 static bool	viaide_suspend(device_t, const pmf_qual_t *);
     66 static bool	viaide_resume(device_t, const pmf_qual_t *);
     67 
     68 CFATTACH_DECL_NEW(viaide, sizeof(struct pciide_softc),
     69     viaide_match, viaide_attach, pciide_detach, NULL);
     70 
     71 static const struct pciide_product_desc pciide_amd_products[] =  {
     72 	{ PCI_PRODUCT_AMD_PBC756_IDE,
     73 	  0,
     74 	  "AMD AMD756 IDE Controller",
     75 	  via_chip_map
     76 	},
     77 	{ PCI_PRODUCT_AMD_PBC766_IDE,
     78 	  0,
     79 	  "AMD AMD766 IDE Controller",
     80 	  via_chip_map
     81 	},
     82 	{ PCI_PRODUCT_AMD_PBC768_IDE,
     83 	  0,
     84 	  "AMD AMD768 IDE Controller",
     85 	  via_chip_map
     86 	},
     87 	{ PCI_PRODUCT_AMD_PBC8111_IDE,
     88 	  0,
     89 	  "AMD AMD8111 IDE Controller",
     90 	  via_chip_map
     91 	},
     92 	{ PCI_PRODUCT_AMD_CS5536_IDE,
     93 	  0,
     94 	  "AMD CS5536 IDE Controller",
     95 	  via_chip_map
     96 	},
     97 	{ 0,
     98 	  0,
     99 	  NULL,
    100 	  NULL
    101 	}
    102 };
    103 
    104 static const struct pciide_product_desc pciide_nvidia_products[] = {
    105 	{ PCI_PRODUCT_NVIDIA_NFORCE_ATA100,
    106 	  0,
    107 	  "NVIDIA nForce IDE Controller",
    108 	  via_chip_map
    109 	},
    110 	{ PCI_PRODUCT_NVIDIA_NFORCE2_ATA133,
    111 	  0,
    112 	  "NVIDIA nForce2 IDE Controller",
    113 	  via_chip_map
    114 	},
    115 	{ PCI_PRODUCT_NVIDIA_NFORCE2_400_ATA133,
    116 	  0,
    117 	  "NVIDIA nForce2 Ultra 400 IDE Controller",
    118 	  via_chip_map
    119 	},
    120 	{ PCI_PRODUCT_NVIDIA_NFORCE2_400_SATA,
    121 	  0,
    122 	  "NVIDIA nForce2 Ultra 400 Serial ATA Controller",
    123 	  via_sata_chip_map_6
    124 	},
    125 	{ PCI_PRODUCT_NVIDIA_NFORCE3_ATA133,
    126 	  0,
    127 	  "NVIDIA nForce3 IDE Controller",
    128 	  via_chip_map
    129 	},
    130 	{ PCI_PRODUCT_NVIDIA_NFORCE3_250_ATA133,
    131 	  0,
    132 	  "NVIDIA nForce3 250 IDE Controller",
    133 	  via_chip_map
    134 	},
    135 	{ PCI_PRODUCT_NVIDIA_NFORCE3_250_SATA,
    136 	  0,
    137 	  "NVIDIA nForce3 250 Serial ATA Controller",
    138 	  via_sata_chip_map_6
    139 	},
    140 	{ PCI_PRODUCT_NVIDIA_NFORCE3_250_SATA2,
    141 	  0,
    142 	  "NVIDIA nForce3 250 Serial ATA Controller",
    143 	  via_sata_chip_map_6
    144 	},
    145 	{ PCI_PRODUCT_NVIDIA_NFORCE4_ATA133,
    146 	  0,
    147 	  "NVIDIA nForce4 IDE Controller",
    148 	  via_chip_map
    149 	},
    150 	{ PCI_PRODUCT_NVIDIA_NFORCE4_SATA1,
    151 	  0,
    152 	  "NVIDIA nForce4 Serial ATA Controller",
    153 	  via_sata_chip_map_6
    154 	},
    155 	{ PCI_PRODUCT_NVIDIA_NFORCE4_SATA2,
    156 	  0,
    157 	  "NVIDIA nForce4 Serial ATA Controller",
    158 	  via_sata_chip_map_6
    159 	},
    160 	{ PCI_PRODUCT_NVIDIA_NFORCE430_ATA133,
    161 	  0,
    162 	  "NVIDIA nForce430 IDE Controller",
    163 	  via_chip_map
    164 	},
    165 	{ PCI_PRODUCT_NVIDIA_NFORCE430_SATA1,
    166 	  0,
    167 	  "NVIDIA nForce430 Serial ATA Controller",
    168 	  via_sata_chip_map_6
    169 	},
    170 	{ PCI_PRODUCT_NVIDIA_NFORCE430_SATA2,
    171 	  0,
    172 	  "NVIDIA nForce430 Serial ATA Controller",
    173 	  via_sata_chip_map_6
    174 	},
    175 	{ PCI_PRODUCT_NVIDIA_MCP04_IDE,
    176 	  0,
    177 	  "NVIDIA MCP04 IDE Controller",
    178 	  via_chip_map
    179 	},
    180 	{ PCI_PRODUCT_NVIDIA_MCP04_SATA,
    181 	  0,
    182 	  "NVIDIA MCP04 Serial ATA Controller",
    183 	  via_sata_chip_map_6
    184 	},
    185 	{ PCI_PRODUCT_NVIDIA_MCP04_SATA2,
    186 	  0,
    187 	  "NVIDIA MCP04 Serial ATA Controller",
    188 	  via_sata_chip_map_6
    189 	},
    190 	{ PCI_PRODUCT_NVIDIA_MCP55_IDE,
    191 	  0,
    192 	  "NVIDIA MCP55 IDE Controller",
    193 	  via_chip_map
    194 	},
    195 	{ PCI_PRODUCT_NVIDIA_MCP55_SATA,
    196 	  0,
    197 	  "NVIDIA MCP55 Serial ATA Controller",
    198 	  via_sata_chip_map_6
    199 	},
    200 	{ PCI_PRODUCT_NVIDIA_MCP55_SATA2,
    201 	  0,
    202 	  "NVIDIA MCP55 Serial ATA Controller",
    203 	  via_sata_chip_map_6
    204 	},
    205 	{ PCI_PRODUCT_NVIDIA_MCP61_IDE,
    206 	  0,
    207 	  "NVIDIA MCP61 IDE Controller",
    208 	  via_chip_map
    209 	},
    210 	{ PCI_PRODUCT_NVIDIA_MCP65_IDE,
    211 	  0,
    212 	  "NVIDIA MCP65 IDE Controller",
    213 	  via_chip_map
    214 	},
    215 	{ PCI_PRODUCT_NVIDIA_MCP73_IDE,
    216 	  0,
    217 	  "NVIDIA MCP73 IDE Controller",
    218 	  via_chip_map
    219 	},
    220 	{ PCI_PRODUCT_NVIDIA_MCP77_IDE,
    221 	  0,
    222 	  "NVIDIA MCP77 IDE Controller",
    223 	  via_chip_map
    224 	},
    225 	{ PCI_PRODUCT_NVIDIA_MCP61_SATA,
    226 	  0,
    227 	  "NVIDIA MCP61 Serial ATA Controller",
    228 	  via_sata_chip_map_6
    229 	},
    230 	{ PCI_PRODUCT_NVIDIA_MCP61_SATA2,
    231 	  0,
    232 	  "NVIDIA MCP61 Serial ATA Controller",
    233 	  via_sata_chip_map_6
    234 	},
    235 	{ PCI_PRODUCT_NVIDIA_MCP61_SATA3,
    236 	  0,
    237 	  "NVIDIA MCP61 Serial ATA Controller",
    238 	  via_sata_chip_map_6
    239 	},
    240 	{ PCI_PRODUCT_NVIDIA_MCP65_SATA,
    241 	  0,
    242 	  "NVIDIA MCP65 Serial ATA Controller",
    243 	  via_sata_chip_map_6
    244 	},
    245 	{ PCI_PRODUCT_NVIDIA_MCP65_SATA2,
    246 	  0,
    247 	  "NVIDIA MCP65 Serial ATA Controller",
    248 	  via_sata_chip_map_6
    249 	},
    250 	{ PCI_PRODUCT_NVIDIA_MCP65_SATA3,
    251 	  0,
    252 	  "NVIDIA MCP65 Serial ATA Controller",
    253 	  via_sata_chip_map_6
    254 	},
    255 	{ PCI_PRODUCT_NVIDIA_MCP65_SATA4,
    256 	  0,
    257 	  "NVIDIA MCP65 Serial ATA Controller",
    258 	  via_sata_chip_map_6
    259 	},
    260 	{ PCI_PRODUCT_NVIDIA_MCP67_IDE,
    261 	  0,
    262 	  "NVIDIA MCP67 IDE Controller",
    263 	  via_chip_map,
    264 	},
    265 	{ PCI_PRODUCT_NVIDIA_MCP67_SATA,
    266 	  0,
    267 	  "NVIDIA MCP67 Serial ATA Controller",
    268 	  via_sata_chip_map_6,
    269 	},
    270 	{ PCI_PRODUCT_NVIDIA_MCP67_SATA2,
    271 	  0,
    272 	  "NVIDIA MCP67 Serial ATA Controller",
    273 	  via_sata_chip_map_6,
    274 	},
    275 	{ PCI_PRODUCT_NVIDIA_MCP67_SATA3,
    276 	  0,
    277 	  "NVIDIA MCP67 Serial ATA Controller",
    278 	  via_sata_chip_map_6,
    279 	},
    280 	{ PCI_PRODUCT_NVIDIA_MCP67_SATA4,
    281 	  0,
    282 	  "NVIDIA MCP67 Serial ATA Controller",
    283 	  via_sata_chip_map_6,
    284 	},
    285 	{ 0,
    286 	  0,
    287 	  NULL,
    288 	  NULL
    289 	}
    290 };
    291 
    292 static const struct pciide_product_desc pciide_via_products[] =  {
    293 	{ PCI_PRODUCT_VIATECH_VT82C586_IDE,
    294 	  0,
    295 	  NULL,
    296 	  via_chip_map,
    297 	 },
    298 	{ PCI_PRODUCT_VIATECH_VT82C586A_IDE,
    299 	  0,
    300 	  NULL,
    301 	  via_chip_map,
    302 	},
    303 	{ PCI_PRODUCT_VIATECH_CX700_IDE,
    304 	  0,
    305 	  NULL,
    306 	  via_chip_map,
    307 	},
    308 	{ PCI_PRODUCT_VIATECH_CX700M2_IDE,
    309 	  0,
    310 	  NULL,
    311 	  via_chip_map,
    312 	},
    313 	{ PCI_PRODUCT_VIATECH_VX900_IDE,
    314 	  0,
    315 	  NULL,
    316 	  via_chip_map,
    317 	},
    318 	{ PCI_PRODUCT_VIATECH_VT6410_RAID,
    319 	  0,
    320 	  NULL,
    321 	  via_chip_map,
    322 	},
    323 	{ PCI_PRODUCT_VIATECH_VT6421_RAID,
    324 	  0,
    325 	  "VIA Technologies VT6421 Serial ATA RAID Controller",
    326 	  via_sata_chip_map_new,
    327 	},
    328 	{ PCI_PRODUCT_VIATECH_VT8237_SATA,
    329 	  0,
    330 	  "VIA Technologies VT8237 SATA Controller",
    331 	  via_sata_chip_map_7,
    332 	},
    333 	{ PCI_PRODUCT_VIATECH_VT8237A_SATA,
    334 	  0,
    335 	  "VIA Technologies VT8237A SATA Controller",
    336 	  via_sata_chip_map_7,
    337 	},
    338 	{ PCI_PRODUCT_VIATECH_VT8237A_SATA_2,
    339 	  0,
    340 	  "VIA Technologies VT8237A (5337) SATA Controller",
    341 	  via_sata_chip_map_7,
    342 	},
    343 	{ PCI_PRODUCT_VIATECH_VT8237R_SATA,
    344 	  0,
    345 	  "VIA Technologies VT8237R SATA Controller",
    346 	  via_sata_chip_map_7,
    347 	},
    348 	{ PCI_PRODUCT_VIATECH_VT8237S_SATA,
    349 	  0,
    350 	  "VIA Technologies VT8237S SATA Controller",
    351 	  via_sata_chip_map_7,
    352 	},
    353 	{ 0,
    354 	  0,
    355 	  NULL,
    356 	  NULL
    357 	}
    358 };
    359 
    360 static const struct pciide_product_desc *
    361 viaide_lookup(pcireg_t id)
    362 {
    363 
    364 	switch (PCI_VENDOR(id)) {
    365 	case PCI_VENDOR_VIATECH:
    366 		return (pciide_lookup_product(id, pciide_via_products));
    367 
    368 	case PCI_VENDOR_AMD:
    369 		return (pciide_lookup_product(id, pciide_amd_products));
    370 
    371 	case PCI_VENDOR_NVIDIA:
    372 		return (pciide_lookup_product(id, pciide_nvidia_products));
    373 	}
    374 	return (NULL);
    375 }
    376 
    377 static int
    378 viaide_match(device_t parent, cfdata_t match, void *aux)
    379 {
    380 	const struct pci_attach_args *pa = aux;
    381 
    382 	if (viaide_lookup(pa->pa_id) != NULL)
    383 		return (2);
    384 	return (0);
    385 }
    386 
    387 static void
    388 viaide_attach(device_t parent, device_t self, void *aux)
    389 {
    390 	const struct pci_attach_args *pa = aux;
    391 	struct pciide_softc *sc = device_private(self);
    392 	const struct pciide_product_desc *pp;
    393 
    394 	sc->sc_wdcdev.sc_atac.atac_dev = self;
    395 
    396 	pp = viaide_lookup(pa->pa_id);
    397 	if (pp == NULL)
    398 		panic("viaide_attach");
    399 	pciide_common_attach(sc, pa, pp);
    400 
    401 	if (!pmf_device_register(self, viaide_suspend, viaide_resume))
    402 		aprint_error_dev(self, "couldn't establish power handler\n");
    403 }
    404 
    405 static int
    406 via_pcib_match(const struct pci_attach_args *pa)
    407 {
    408 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
    409 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA &&
    410 	    PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH)
    411 		return (1);
    412 	return 0;
    413 }
    414 
    415 static bool
    416 viaide_suspend(device_t dv, const pmf_qual_t *qual)
    417 {
    418 	struct pciide_softc *sc = device_private(dv);
    419 
    420 	sc->sc_pm_reg[0] = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_IDECONF(sc));
    421 	/* APO_DATATIM(sc) includes APO_UDMA(sc) */
    422 	sc->sc_pm_reg[1] = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_DATATIM(sc));
    423 	/* This two are VIA-only, but should be ignored by other devices. */
    424 	sc->sc_pm_reg[2] = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_CTLMISC(sc));
    425 	sc->sc_pm_reg[3] = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_MISCTIM(sc));
    426 
    427 	return true;
    428 }
    429 
    430 static bool
    431 viaide_resume(device_t dv, const pmf_qual_t *qual)
    432 {
    433 	struct pciide_softc *sc = device_private(dv);
    434 
    435 	pci_conf_write(sc->sc_pc, sc->sc_tag, APO_IDECONF(sc),
    436 	    sc->sc_pm_reg[0]);
    437 	pci_conf_write(sc->sc_pc, sc->sc_tag, APO_DATATIM(sc),
    438 	    sc->sc_pm_reg[1]);
    439 	/* This two are VIA-only, but should be ignored by other devices. */
    440 	pci_conf_write(sc->sc_pc, sc->sc_tag, APO_CTLMISC(sc),
    441 	    sc->sc_pm_reg[2]);
    442 	pci_conf_write(sc->sc_pc, sc->sc_tag, APO_MISCTIM(sc),
    443 	    sc->sc_pm_reg[3]);
    444 
    445 	return true;
    446 }
    447 
    448 static void
    449 via_chip_map(struct pciide_softc *sc, const struct pci_attach_args *pa)
    450 {
    451 	struct pciide_channel *cp;
    452 	pcireg_t interface = PCI_INTERFACE(pa->pa_class);
    453 	pcireg_t vendor = PCI_VENDOR(pa->pa_id);
    454 	int channel;
    455 	u_int32_t ideconf;
    456 	pcireg_t pcib_id, pcib_class;
    457 	struct pci_attach_args pcib_pa;
    458 
    459 	if (pciide_chipen(sc, pa) == 0)
    460 		return;
    461 
    462 	switch (vendor) {
    463 	case PCI_VENDOR_VIATECH:
    464 		switch (PCI_PRODUCT(pa->pa_id)) {
    465 		case PCI_PRODUCT_VIATECH_VT6410_RAID:
    466 			aprint_normal_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    467 			    "VIA Technologies VT6410 IDE controller\n");
    468 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    469 			interface = PCIIDE_INTERFACE_BUS_MASTER_DMA |
    470 			    PCIIDE_INTERFACE_PCI(0) | PCIIDE_INTERFACE_PCI(1);
    471 			break;
    472 		case PCI_PRODUCT_VIATECH_VX900_IDE:
    473 			aprint_normal_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    474 			    "VIA Technologies VX900 ATA133 controller\n");
    475 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    476 			break;
    477 		default:
    478 			/*
    479 			 * get a PCI tag for the ISA bridge.
    480 			 */
    481 			if (pci_find_device(&pcib_pa, via_pcib_match) == 0)
    482 				goto unknown;
    483 			pcib_id = pcib_pa.pa_id;
    484 			pcib_class = pcib_pa.pa_class;
    485 			aprint_normal_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    486 			    "VIA Technologies ");
    487 			switch (PCI_PRODUCT(pcib_id)) {
    488 			case PCI_PRODUCT_VIATECH_VT82C586_ISA:
    489 				aprint_normal("VT82C586 (Apollo VP) ");
    490 				if(PCI_REVISION(pcib_class) >= 0x02) {
    491 					aprint_normal("ATA33 controller\n");
    492 					sc->sc_wdcdev.sc_atac.atac_udma_cap = 2;
    493 				} else {
    494 					aprint_normal("controller\n");
    495 					sc->sc_wdcdev.sc_atac.atac_udma_cap = 0;
    496 				}
    497 				break;
    498 			case PCI_PRODUCT_VIATECH_VT82C596A:
    499 				aprint_normal("VT82C596A (Apollo Pro) ");
    500 				if (PCI_REVISION(pcib_class) >= 0x12) {
    501 					aprint_normal("ATA66 controller\n");
    502 					sc->sc_wdcdev.sc_atac.atac_udma_cap = 4;
    503 				} else {
    504 					aprint_normal("ATA33 controller\n");
    505 					sc->sc_wdcdev.sc_atac.atac_udma_cap = 2;
    506 				}
    507 				break;
    508 			case PCI_PRODUCT_VIATECH_VT82C686A_ISA:
    509 				aprint_normal("VT82C686A (Apollo KX133) ");
    510 				if (PCI_REVISION(pcib_class) >= 0x40) {
    511 					aprint_normal("ATA100 controller\n");
    512 					sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
    513 				} else {
    514 					aprint_normal("ATA66 controller\n");
    515 					sc->sc_wdcdev.sc_atac.atac_udma_cap = 4;
    516 				}
    517 				break;
    518 			case PCI_PRODUCT_VIATECH_VT8231:
    519 				aprint_normal("VT8231 ATA100 controller\n");
    520 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
    521 				break;
    522 			case PCI_PRODUCT_VIATECH_VT8233:
    523 				aprint_normal("VT8233 ATA100 controller\n");
    524 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
    525 				break;
    526 			case PCI_PRODUCT_VIATECH_VT8233A:
    527 				aprint_normal("VT8233A ATA133 controller\n");
    528 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    529 				break;
    530 			case PCI_PRODUCT_VIATECH_VT8235:
    531 				aprint_normal("VT8235 ATA133 controller\n");
    532 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    533 				break;
    534 			case PCI_PRODUCT_VIATECH_VT8237:
    535 				aprint_normal("VT8237 ATA133 controller\n");
    536 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    537 				break;
    538 			case PCI_PRODUCT_VIATECH_VT8237A_ISA:
    539 				aprint_normal("VT8237A ATA133 controller\n");
    540 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    541 				break;
    542 			case PCI_PRODUCT_VIATECH_CX700:
    543 				aprint_normal("CX700 ATA133 controller\n");
    544 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    545 				break;
    546 			case PCI_PRODUCT_VIATECH_VT8251:
    547 				aprint_normal("VT8251 ATA133 controller\n");
    548 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    549 				break;
    550 			default:
    551 		unknown:
    552 				aprint_normal("unknown VIA ATA controller\n");
    553 				sc->sc_wdcdev.sc_atac.atac_udma_cap = 0;
    554 			}
    555 			break;
    556 		}
    557 		sc->sc_apo_regbase = APO_VIA_REGBASE;
    558 		break;
    559 	case PCI_VENDOR_AMD:
    560 		switch (sc->sc_pp->ide_product) {
    561 		case PCI_PRODUCT_AMD_PBC8111_IDE:
    562 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    563 			break;
    564 		case PCI_PRODUCT_AMD_CS5536_IDE:
    565 		case PCI_PRODUCT_AMD_PBC766_IDE:
    566 		case PCI_PRODUCT_AMD_PBC768_IDE:
    567 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
    568 			break;
    569 		default:
    570 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 4;
    571 		}
    572 		sc->sc_apo_regbase = APO_AMD_REGBASE;
    573 		break;
    574 	case PCI_VENDOR_NVIDIA:
    575 		switch (sc->sc_pp->ide_product) {
    576 		case PCI_PRODUCT_NVIDIA_NFORCE_ATA100:
    577 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
    578 			break;
    579 		case PCI_PRODUCT_NVIDIA_NFORCE2_ATA133:
    580 		case PCI_PRODUCT_NVIDIA_NFORCE2_400_ATA133:
    581 		case PCI_PRODUCT_NVIDIA_NFORCE3_ATA133:
    582 		case PCI_PRODUCT_NVIDIA_NFORCE3_250_ATA133:
    583 		case PCI_PRODUCT_NVIDIA_NFORCE4_ATA133:
    584 		case PCI_PRODUCT_NVIDIA_NFORCE430_ATA133:
    585 		case PCI_PRODUCT_NVIDIA_MCP04_IDE:
    586 		case PCI_PRODUCT_NVIDIA_MCP55_IDE:
    587 		case PCI_PRODUCT_NVIDIA_MCP61_IDE:
    588 		case PCI_PRODUCT_NVIDIA_MCP65_IDE:
    589 		case PCI_PRODUCT_NVIDIA_MCP67_IDE:
    590 		case PCI_PRODUCT_NVIDIA_MCP73_IDE:
    591 		case PCI_PRODUCT_NVIDIA_MCP77_IDE:
    592 			sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    593 			break;
    594 		}
    595 		sc->sc_apo_regbase = APO_NVIDIA_REGBASE;
    596 		break;
    597 	default:
    598 		panic("via_chip_map: unknown vendor");
    599 	}
    600 
    601 	aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    602 	    "bus-master DMA support present");
    603 	pciide_mapreg_dma(sc, pa);
    604 	aprint_verbose("\n");
    605 	sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
    606 	if (sc->sc_dma_ok) {
    607 		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA;
    608 		sc->sc_wdcdev.irqack = pciide_irqack;
    609 		if (sc->sc_wdcdev.sc_atac.atac_udma_cap > 0)
    610 			sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_UDMA;
    611 	}
    612 	sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
    613 	sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
    614 	sc->sc_wdcdev.sc_atac.atac_set_modes = via_setup_channel;
    615 	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
    616 	sc->sc_wdcdev.sc_atac.atac_nchannels = PCIIDE_NUM_CHANNELS;
    617 	sc->sc_wdcdev.wdc_maxdrives = 2;
    618 
    619 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE &&
    620 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_RAID)
    621 		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_RAID;
    622 
    623 	wdc_allocate_regs(&sc->sc_wdcdev);
    624 
    625 	ATADEBUG_PRINT(("via_chip_map: old APO_IDECONF=0x%x, "
    626 	    "APO_CTLMISC=0x%x, APO_DATATIM=0x%x, APO_UDMA=0x%x\n",
    627 	    pci_conf_read(sc->sc_pc, sc->sc_tag, APO_IDECONF(sc)),
    628 	    pci_conf_read(sc->sc_pc, sc->sc_tag, APO_CTLMISC(sc)),
    629 	    pci_conf_read(sc->sc_pc, sc->sc_tag, APO_DATATIM(sc)),
    630 	    pci_conf_read(sc->sc_pc, sc->sc_tag, APO_UDMA(sc))),
    631 	    DEBUG_PROBE);
    632 
    633 	ideconf = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_IDECONF(sc));
    634 	for (channel = 0; channel < sc->sc_wdcdev.sc_atac.atac_nchannels;
    635 	     channel++) {
    636 		cp = &sc->pciide_channels[channel];
    637 		if (pciide_chansetup(sc, channel, interface) == 0)
    638 			continue;
    639 
    640 		if ((ideconf & APO_IDECONF_EN(channel)) == 0) {
    641 			aprint_normal_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    642 			    "%s channel ignored (disabled)\n", cp->name);
    643 			cp->ata_channel.ch_flags |= ATACH_DISABLED;
    644 			continue;
    645 		}
    646 		via_mapchan(pa, cp, interface, pciide_pci_intr);
    647 	}
    648 }
    649 
    650 static void
    651 via_mapchan(const struct pci_attach_args *pa,	struct pciide_channel *cp,
    652     pcireg_t interface, int (*pci_intr)(void *))
    653 {
    654 	struct ata_channel *wdc_cp;
    655 	struct pciide_softc *sc;
    656 	prop_bool_t compat_nat_enable;
    657 
    658 	wdc_cp = &cp->ata_channel;
    659 	sc = CHAN_TO_PCIIDE(&cp->ata_channel);
    660 	compat_nat_enable = prop_dictionary_get(
    661 	    device_properties(sc->sc_wdcdev.sc_atac.atac_dev),
    662 	      "use-compat-native-irq");
    663 
    664 	if (interface & PCIIDE_INTERFACE_PCI(wdc_cp->ch_channel)) {
    665 		/* native mode with irq 14/15 requested? */
    666 		if (compat_nat_enable != NULL &&
    667 		    prop_bool_true(compat_nat_enable))
    668 			via_mapregs_compat_native(pa, cp);
    669 		else
    670 			pciide_mapregs_native(pa, cp, pci_intr);
    671 	} else {
    672 		pciide_mapregs_compat(pa, cp, wdc_cp->ch_channel);
    673 		if ((cp->ata_channel.ch_flags & ATACH_DISABLED) == 0)
    674 			pciide_map_compat_intr(pa, cp, wdc_cp->ch_channel);
    675 	}
    676 	wdcattach(wdc_cp);
    677 }
    678 
    679 /*
    680  * At least under certain (mis)configurations (e.g. on the "Pegasos" board)
    681  * the VT8231-IDE's native mode only works with irq 14/15, and cannot be
    682  * programmed to use a single native PCI irq alone. So we install an interrupt
    683  * handler for each channel, as in compatibility mode.
    684  */
    685 static void
    686 via_mapregs_compat_native(const struct pci_attach_args *pa,
    687     struct pciide_channel *cp)
    688 {
    689 	struct ata_channel *wdc_cp;
    690 	struct pciide_softc *sc;
    691 
    692 	wdc_cp = &cp->ata_channel;
    693 	sc = CHAN_TO_PCIIDE(&cp->ata_channel);
    694 
    695 	/* XXX prevent pciide_mapregs_native from installing a handler */
    696 	if (sc->sc_pci_ih == NULL)
    697 		sc->sc_pci_ih = (void *)~0;
    698 	pciide_mapregs_native(pa, cp, NULL);
    699 
    700 	/* interrupts are fixed to 14/15, as in compatibility mode */
    701 	cp->compat = 1;
    702 	if ((wdc_cp->ch_flags & ATACH_DISABLED) == 0) {
    703 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
    704 		cp->ih = pciide_machdep_compat_intr_establish(
    705 		    sc->sc_wdcdev.sc_atac.atac_dev, pa, wdc_cp->ch_channel,
    706 		    pciide_compat_intr, cp);
    707 		if (cp->ih == NULL) {
    708 #endif
    709 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    710 			    "no compatibility interrupt for "
    711 			    "use by %s channel\n", cp->name);
    712 			wdc_cp->ch_flags |= ATACH_DISABLED;
    713 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
    714 		}
    715 		sc->sc_pci_ih = cp->ih;  /* XXX */
    716 #endif
    717 	}
    718 }
    719 
    720 static void
    721 via_setup_channel(struct ata_channel *chp)
    722 {
    723 	u_int32_t udmatim_reg, datatim_reg;
    724 	u_int8_t idedma_ctl;
    725 	int mode, drive, s;
    726 	struct ata_drive_datas *drvp;
    727 	struct atac_softc *atac = chp->ch_atac;
    728 	struct pciide_channel *cp = CHAN_TO_PCHAN(chp);
    729 	struct pciide_softc *sc = CHAN_TO_PCIIDE(chp);
    730 #ifndef PCIIDE_AMD756_ENABLEDMA
    731 	int rev = PCI_REVISION(
    732 	    pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_CLASS_REG));
    733 #endif
    734 
    735 	idedma_ctl = 0;
    736 	datatim_reg = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_DATATIM(sc));
    737 	udmatim_reg = pci_conf_read(sc->sc_pc, sc->sc_tag, APO_UDMA(sc));
    738 	datatim_reg &= ~APO_DATATIM_MASK(chp->ch_channel);
    739 	udmatim_reg &= ~APO_UDMA_MASK(chp->ch_channel);
    740 
    741 	/* setup DMA if needed */
    742 	pciide_channel_dma_setup(cp);
    743 
    744 	for (drive = 0; drive < 2; drive++) {
    745 		drvp = &chp->ch_drive[drive];
    746 		/* If no drive, skip */
    747 		if (drvp->drive_type == ATA_DRIVET_NONE)
    748 			continue;
    749 		/* add timing values, setup DMA if needed */
    750 		if (((drvp->drive_flags & ATA_DRIVE_DMA) == 0 &&
    751 		    (drvp->drive_flags & ATA_DRIVE_UDMA) == 0)) {
    752 			mode = drvp->PIO_mode;
    753 			goto pio;
    754 		}
    755 		if ((atac->atac_cap & ATAC_CAP_UDMA) &&
    756 		    (drvp->drive_flags & ATA_DRIVE_UDMA)) {
    757 			/* use Ultra/DMA */
    758 			s = splbio();
    759 			drvp->drive_flags &= ~ATA_DRIVE_DMA;
    760 			splx(s);
    761 			udmatim_reg |= APO_UDMA_EN(chp->ch_channel, drive) |
    762 			    APO_UDMA_EN_MTH(chp->ch_channel, drive);
    763 			switch (PCI_VENDOR(sc->sc_pci_id)) {
    764 			case PCI_VENDOR_VIATECH:
    765 				if (sc->sc_wdcdev.sc_atac.atac_udma_cap == 6) {
    766 					/* 8233a */
    767 					udmatim_reg |= APO_UDMA_TIME(
    768 					    chp->ch_channel,
    769 					    drive,
    770 					    via_udma133_tim[drvp->UDMA_mode]);
    771 				} else if (sc->sc_wdcdev.sc_atac.atac_udma_cap == 5) {
    772 					/* 686b */
    773 					udmatim_reg |= APO_UDMA_TIME(
    774 					    chp->ch_channel,
    775 					    drive,
    776 					    via_udma100_tim[drvp->UDMA_mode]);
    777 				} else if (sc->sc_wdcdev.sc_atac.atac_udma_cap == 4) {
    778 					/* 596b or 686a */
    779 					udmatim_reg |= APO_UDMA_CLK66(
    780 					    chp->ch_channel);
    781 					udmatim_reg |= APO_UDMA_TIME(
    782 					    chp->ch_channel,
    783 					    drive,
    784 					    via_udma66_tim[drvp->UDMA_mode]);
    785 				} else {
    786 					/* 596a or 586b */
    787 					udmatim_reg |= APO_UDMA_TIME(
    788 					    chp->ch_channel,
    789 					    drive,
    790 					    via_udma33_tim[drvp->UDMA_mode]);
    791 				}
    792 				break;
    793 			case PCI_VENDOR_AMD:
    794 			case PCI_VENDOR_NVIDIA:
    795 				udmatim_reg |= APO_UDMA_TIME(chp->ch_channel,
    796 				    drive, amd7x6_udma_tim[drvp->UDMA_mode]);
    797 				 break;
    798 			}
    799 			/* can use PIO timings, MW DMA unused */
    800 			mode = drvp->PIO_mode;
    801 		} else {
    802 			/* use Multiword DMA, but only if revision is OK */
    803 			s = splbio();
    804 			drvp->drive_flags &= ~ATA_DRIVE_UDMA;
    805 			splx(s);
    806 #ifndef PCIIDE_AMD756_ENABLEDMA
    807 			/*
    808 			 * The workaround doesn't seem to be necessary
    809 			 * with all drives, so it can be disabled by
    810 			 * PCIIDE_AMD756_ENABLEDMA. It causes a hard hang if
    811 			 * triggered.
    812 			 */
    813 			if (PCI_VENDOR(sc->sc_pci_id) == PCI_VENDOR_AMD &&
    814 			    sc->sc_pp->ide_product ==
    815 			    PCI_PRODUCT_AMD_PBC756_IDE &&
    816 			    AMD756_CHIPREV_DISABLEDMA(rev)) {
    817 				aprint_normal(
    818 				    "%s:%d:%d: multi-word DMA disabled due "
    819 				    "to chip revision\n",
    820 				    device_xname(
    821 				      sc->sc_wdcdev.sc_atac.atac_dev),
    822 				    chp->ch_channel, drive);
    823 				mode = drvp->PIO_mode;
    824 				s = splbio();
    825 				drvp->drive_flags &= ~ATA_DRIVE_DMA;
    826 				splx(s);
    827 				goto pio;
    828 			}
    829 #endif
    830 			/* mode = min(pio, dma+2) */
    831 			if (drvp->PIO_mode <= (drvp->DMA_mode + 2))
    832 				mode = drvp->PIO_mode;
    833 			else
    834 				mode = drvp->DMA_mode + 2;
    835 		}
    836 		idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
    837 
    838 pio:		/* setup PIO mode */
    839 		if (mode <= 2) {
    840 			drvp->DMA_mode = 0;
    841 			drvp->PIO_mode = 0;
    842 			mode = 0;
    843 		} else {
    844 			drvp->PIO_mode = mode;
    845 			drvp->DMA_mode = mode - 2;
    846 		}
    847 		datatim_reg |=
    848 		    APO_DATATIM_PULSE(chp->ch_channel, drive,
    849 			apollo_pio_set[mode]) |
    850 		    APO_DATATIM_RECOV(chp->ch_channel, drive,
    851 			apollo_pio_rec[mode]);
    852 	}
    853 	if (idedma_ctl != 0) {
    854 		/* Add software bits in status register */
    855 		bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0,
    856 		    idedma_ctl);
    857 	}
    858 	pci_conf_write(sc->sc_pc, sc->sc_tag, APO_DATATIM(sc), datatim_reg);
    859 	pci_conf_write(sc->sc_pc, sc->sc_tag, APO_UDMA(sc), udmatim_reg);
    860 	ATADEBUG_PRINT(("via_chip_map: APO_DATATIM=0x%x, APO_UDMA=0x%x\n",
    861 	    pci_conf_read(sc->sc_pc, sc->sc_tag, APO_DATATIM(sc)),
    862 	    pci_conf_read(sc->sc_pc, sc->sc_tag, APO_UDMA(sc))), DEBUG_PROBE);
    863 }
    864 
    865 static int
    866 via_sata_chip_map_common(struct pciide_softc *sc,
    867     const struct pci_attach_args *cpa)
    868 {
    869 	pcireg_t csr;
    870 	int maptype, ret;
    871 	struct pci_attach_args pac, *pa = &pac;
    872 
    873 	pac = *cpa;
    874 
    875 	if (pciide_chipen(sc, pa) == 0)
    876 		return 0;
    877 
    878 	aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    879 	    "bus-master DMA support present");
    880 	pciide_mapreg_dma(sc, pa);
    881 	aprint_verbose("\n");
    882 
    883 	if (sc->sc_dma_ok) {
    884 		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_UDMA | ATAC_CAP_DMA;
    885 		sc->sc_wdcdev.irqack = pciide_irqack;
    886 	}
    887 	sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
    888 	sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
    889 	sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
    890 
    891 	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
    892 	sc->sc_wdcdev.sc_atac.atac_nchannels = PCIIDE_NUM_CHANNELS;
    893 	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
    894 	sc->sc_wdcdev.sc_atac.atac_set_modes = sata_setup_channel;
    895 	sc->sc_wdcdev.wdc_maxdrives = 2;
    896 
    897 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE &&
    898 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_RAID)
    899 		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_RAID;
    900 
    901 	wdc_allocate_regs(&sc->sc_wdcdev);
    902 	maptype = pci_mapreg_type(pa->pa_pc, pa->pa_tag,
    903 	    PCI_MAPREG_START + 0x14);
    904 	switch(maptype) {
    905 	case PCI_MAPREG_TYPE_IO:
    906 		ret = pci_mapreg_map(pa, PCI_MAPREG_START + 0x14,
    907 		    PCI_MAPREG_TYPE_IO, 0, &sc->sc_ba5_st, &sc->sc_ba5_sh,
    908 		    NULL, &sc->sc_ba5_ss);
    909 		break;
    910 	case PCI_MAPREG_MEM_TYPE_32BIT:
    911 		/*
    912 		 * Enable memory-space access if it isn't already there.
    913 		 */
    914 		csr = pci_conf_read(pa->pa_pc, pa->pa_tag,
    915 		    PCI_COMMAND_STATUS_REG);
    916 		if ((csr & PCI_COMMAND_MEM_ENABLE) == 0 &&
    917 		    (pa->pa_flags & PCI_FLAGS_MEM_OKAY) != 0) {
    918 
    919 			pci_conf_write(pa->pa_pc, pa->pa_tag,
    920 			    PCI_COMMAND_STATUS_REG,
    921 			    csr | PCI_COMMAND_MEM_ENABLE);
    922 		}
    923 
    924 		ret = pci_mapreg_map(pa, PCI_MAPREG_START + 0x14,
    925 		    PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
    926 		    0, &sc->sc_ba5_st, &sc->sc_ba5_sh,
    927 		    NULL, &sc->sc_ba5_ss);
    928 		break;
    929 	default:
    930 		aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    931 		    "couldn't map sata regs, unsupported maptype (0x%x)\n",
    932 		    maptype);
    933 		return 0;
    934 	}
    935 	if (ret != 0) {
    936 		aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    937 		    "couldn't map sata regs\n");
    938 		return 0;
    939 	}
    940 	return 1;
    941 }
    942 
    943 static void
    944 via_sata_chip_map(struct pciide_softc *sc, const struct pci_attach_args *pa,
    945     int satareg_shift)
    946 {
    947 	struct pciide_channel *cp;
    948 	struct ata_channel *wdc_cp;
    949 	struct wdc_regs *wdr;
    950 	pcireg_t interface;
    951 	int channel;
    952 
    953 	interface = PCI_INTERFACE(pa->pa_class);
    954 
    955 	if (via_sata_chip_map_common(sc, pa) == 0)
    956 		return;
    957 
    958 	if (interface == 0) {
    959 		ATADEBUG_PRINT(("via_sata_chip_map interface == 0\n"),
    960 		    DEBUG_PROBE);
    961 		interface = PCIIDE_INTERFACE_BUS_MASTER_DMA |
    962 		    PCIIDE_INTERFACE_PCI(0) | PCIIDE_INTERFACE_PCI(1);
    963 	}
    964 
    965 	sc->sc_wdcdev.sc_atac.atac_probe = wdc_sataprobe;
    966 	sc->sc_wdcdev.wdc_maxdrives = 1;
    967 	for (channel = 0; channel < sc->sc_wdcdev.sc_atac.atac_nchannels;
    968 	     channel++) {
    969 		cp = &sc->pciide_channels[channel];
    970 		if (pciide_chansetup(sc, channel, interface) == 0)
    971 			continue;
    972 		wdc_cp = &cp->ata_channel;
    973 		wdr = CHAN_TO_WDC_REGS(wdc_cp);
    974 		wdr->sata_iot = sc->sc_ba5_st;
    975 		wdr->sata_baseioh = sc->sc_ba5_sh;
    976 		if (bus_space_subregion(wdr->sata_iot, wdr->sata_baseioh,
    977 		    (wdc_cp->ch_channel << satareg_shift) + 0x0, 4,
    978 		    &wdr->sata_status) != 0) {
    979 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    980 			    "couldn't map channel %d sata_status regs\n",
    981 			    wdc_cp->ch_channel);
    982 			continue;
    983 		}
    984 		if (bus_space_subregion(wdr->sata_iot, wdr->sata_baseioh,
    985 		    (wdc_cp->ch_channel << satareg_shift) + 0x4, 4,
    986 		    &wdr->sata_error) != 0) {
    987 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    988 			    "couldn't map channel %d sata_error regs\n",
    989 			    wdc_cp->ch_channel);
    990 			continue;
    991 		}
    992 		if (bus_space_subregion(wdr->sata_iot, wdr->sata_baseioh,
    993 		    (wdc_cp->ch_channel << satareg_shift) + 0x8, 4,
    994 		    &wdr->sata_control) != 0) {
    995 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
    996 			    "couldn't map channel %d sata_control regs\n",
    997 			    wdc_cp->ch_channel);
    998 			continue;
    999 		}
   1000 		pciide_mapchan(pa, cp, interface, pciide_pci_intr);
   1001 	}
   1002 }
   1003 
   1004 static void
   1005 via_sata_chip_map_6(struct pciide_softc *sc, const struct pci_attach_args *pa)
   1006 {
   1007 	via_sata_chip_map(sc, pa, 6);
   1008 }
   1009 
   1010 static void
   1011 via_sata_chip_map_7(struct pciide_softc *sc, const struct pci_attach_args *pa)
   1012 {
   1013 	via_sata_chip_map(sc, pa, 7);
   1014 }
   1015 
   1016 static void
   1017 via_vt6421_mapreg_dma(struct pciide_softc *sc, const struct pci_attach_args *pa)
   1018 {
   1019 	struct pciide_channel *pc;
   1020 	int chan, reg;
   1021 	bus_size_t size;
   1022 
   1023 	sc->sc_dma_ok = (pci_mapreg_map(pa, PCIIDE_REG_BUS_MASTER_DMA,
   1024 	    PCI_MAPREG_TYPE_IO, 0, &sc->sc_dma_iot, &sc->sc_dma_ioh,
   1025 	    NULL, &sc->sc_dma_ios) == 0);
   1026 	sc->sc_dmat = pa->pa_dmat;
   1027 	if (sc->sc_dma_ok == 0) {
   1028 		aprint_verbose(", but unused (couldn't map registers)");
   1029 	} else {
   1030 		sc->sc_wdcdev.dma_arg = sc;
   1031 		sc->sc_wdcdev.dma_init = pciide_dma_init;
   1032 		sc->sc_wdcdev.dma_start = pciide_dma_start;
   1033 		sc->sc_wdcdev.dma_finish = pciide_dma_finish;
   1034 	}
   1035 
   1036 	if (device_cfdata(sc->sc_wdcdev.sc_atac.atac_dev)->cf_flags &
   1037 	    PCIIDE_OPTIONS_NODMA) {
   1038 		aprint_verbose(
   1039 		    ", but unused (forced off by config file)");
   1040 		sc->sc_dma_ok = 0;
   1041 	}
   1042 
   1043 	if (sc->sc_dma_ok == 0)
   1044 		return;
   1045 
   1046 	for (chan = 0; chan < 4; chan++) {
   1047 		pc = &sc->pciide_channels[chan];
   1048 		for (reg = 0; reg < IDEDMA_NREGS; reg++) {
   1049 			size = 4;
   1050 			if (size > (IDEDMA_SCH_OFFSET - reg))
   1051 				size = IDEDMA_SCH_OFFSET - reg;
   1052 			if (bus_space_subregion(sc->sc_dma_iot, sc->sc_dma_ioh,
   1053 			    IDEDMA_SCH_OFFSET * chan + reg, size,
   1054 			    &pc->dma_iohs[reg]) != 0) {
   1055 				sc->sc_dma_ok = 0;
   1056 				aprint_verbose(", but can't subregion offset "
   1057 				               "%d size %lu",
   1058 					       reg, (u_long)size);
   1059 				return;
   1060 			}
   1061 		}
   1062 	}
   1063 }
   1064 
   1065 static int
   1066 via_vt6421_chansetup(struct pciide_softc *sc, int channel)
   1067 {
   1068 	struct pciide_channel *cp = &sc->pciide_channels[channel];
   1069 
   1070 	sc->wdc_chanarray[channel] = &cp->ata_channel;
   1071 
   1072 	cp->ata_channel.ch_channel = channel;
   1073 	cp->ata_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
   1074 	cp->ata_channel.ch_queue =
   1075 	    malloc(sizeof(struct ata_queue), M_DEVBUF, M_NOWAIT);
   1076 	if (cp->ata_channel.ch_queue == NULL) {
   1077 		aprint_error("%s channel %d: "
   1078 		    "can't allocate memory for command queue",
   1079 		    device_xname(sc->sc_wdcdev.sc_atac.atac_dev), channel);
   1080 		return 0;
   1081 	}
   1082 	return 1;
   1083 }
   1084 
   1085 static void
   1086 via_sata_chip_map_new(struct pciide_softc *sc,
   1087     const struct pci_attach_args *pa)
   1088 {
   1089 	struct pciide_channel *cp;
   1090 	struct ata_channel *wdc_cp;
   1091 	struct wdc_regs *wdr;
   1092 	int channel;
   1093 	pci_intr_handle_t intrhandle;
   1094 	const char *intrstr;
   1095 	int i;
   1096 
   1097 	if (pciide_chipen(sc, pa) == 0)
   1098 		return;
   1099 
   1100 	sc->sc_apo_regbase = APO_VIA_VT6421_REGBASE;
   1101 
   1102 	if (pci_mapreg_map(pa, PCI_BAR(5), PCI_MAPREG_TYPE_IO, 0,
   1103 	    &sc->sc_ba5_st, &sc->sc_ba5_sh, NULL, &sc->sc_ba5_ss) != 0) {
   1104 		aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1105 		    "couldn't map SATA regs\n");
   1106 	}
   1107 
   1108 	aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1109 	    "bus-master DMA support present");
   1110 	via_vt6421_mapreg_dma(sc, pa);
   1111 	aprint_verbose("\n");
   1112 
   1113 	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
   1114 	sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
   1115 	if (sc->sc_dma_ok) {
   1116 		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA | ATAC_CAP_UDMA;
   1117 		sc->sc_wdcdev.irqack = pciide_irqack;
   1118 		sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
   1119 		sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
   1120 	}
   1121 	sc->sc_wdcdev.sc_atac.atac_set_modes = sata_setup_channel;
   1122 
   1123 	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
   1124 	sc->sc_wdcdev.sc_atac.atac_nchannels = 3;
   1125 	sc->sc_wdcdev.wdc_maxdrives = 2;
   1126 
   1127 	wdc_allocate_regs(&sc->sc_wdcdev);
   1128 
   1129 	if (pci_intr_map(pa, &intrhandle) != 0) {
   1130 		aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1131 		    "couldn't map native-PCI interrupt\n");
   1132 		return;
   1133 	}
   1134 	intrstr = pci_intr_string(pa->pa_pc, intrhandle);
   1135 	sc->sc_pci_ih = pci_intr_establish(pa->pa_pc,
   1136 	    intrhandle, IPL_BIO, pciide_pci_intr, sc);
   1137 	if (sc->sc_pci_ih == NULL) {
   1138 		aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1139 		    "couldn't establish native-PCI interrupt");
   1140 		if (intrstr != NULL)
   1141 		    aprint_error(" at %s", intrstr);
   1142 		aprint_error("\n");
   1143 		return;
   1144 	}
   1145 	aprint_normal_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1146 	    "using %s for native-PCI interrupt\n",
   1147 	    intrstr ? intrstr : "unknown interrupt");
   1148 
   1149 	for (channel = 0; channel < sc->sc_wdcdev.sc_atac.atac_nchannels;
   1150 	     channel++) {
   1151 		cp = &sc->pciide_channels[channel];
   1152 		if (via_vt6421_chansetup(sc, channel) == 0)
   1153 			continue;
   1154 		wdc_cp = &cp->ata_channel;
   1155 		wdr = CHAN_TO_WDC_REGS(wdc_cp);
   1156 
   1157 		wdr->sata_iot = sc->sc_ba5_st;
   1158 		wdr->sata_baseioh = sc->sc_ba5_sh;
   1159 		if (bus_space_subregion(wdr->sata_iot, wdr->sata_baseioh,
   1160 		    (wdc_cp->ch_channel << 6) + 0x0, 4,
   1161 		    &wdr->sata_status) != 0) {
   1162 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1163 			    "couldn't map channel %d sata_status regs\n",
   1164 			    wdc_cp->ch_channel);
   1165 			continue;
   1166 		}
   1167 		if (bus_space_subregion(wdr->sata_iot, wdr->sata_baseioh,
   1168 		    (wdc_cp->ch_channel << 6) + 0x4, 4,
   1169 		    &wdr->sata_error) != 0) {
   1170 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1171 			    "couldn't map channel %d sata_error regs\n",
   1172 			    wdc_cp->ch_channel);
   1173 			continue;
   1174 		}
   1175 		if (bus_space_subregion(wdr->sata_iot, wdr->sata_baseioh,
   1176 		    (wdc_cp->ch_channel << 6) + 0x8, 4,
   1177 		    &wdr->sata_control) != 0) {
   1178 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1179 			    "couldn't map channel %d sata_control regs\n",
   1180 			    wdc_cp->ch_channel);
   1181 			continue;
   1182 		}
   1183 
   1184 		if (pci_mapreg_map(pa, PCI_BAR(wdc_cp->ch_channel),
   1185 		    PCI_MAPREG_TYPE_IO, 0, &wdr->cmd_iot, &wdr->cmd_baseioh,
   1186 		    NULL, &wdr->cmd_ios) != 0) {
   1187 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1188 			    "couldn't map %s channel regs\n", cp->name);
   1189 		}
   1190 		wdr->ctl_iot = wdr->cmd_iot;
   1191 		for (i = 0; i < WDC_NREG; i++) {
   1192 			if (bus_space_subregion(wdr->cmd_iot,
   1193 			    wdr->cmd_baseioh, i, i == 0 ? 4 : 1,
   1194 			    &wdr->cmd_iohs[i]) != 0) {
   1195 				aprint_error_dev(
   1196 				    sc->sc_wdcdev.sc_atac.atac_dev,
   1197 				    "couldn't subregion %s "
   1198 				    "channel cmd regs\n", cp->name);
   1199 				return;
   1200 			}
   1201 		}
   1202 		if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
   1203 		    WDC_NREG + 2, 1,  &wdr->ctl_ioh) != 0) {
   1204 			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
   1205 			    "couldn't map channel %d ctl regs\n", channel);
   1206 			return;
   1207 		}
   1208 		wdc_init_shadow_regs(wdc_cp);
   1209 		wdr->data32iot = wdr->cmd_iot;
   1210 		wdr->data32ioh = wdr->cmd_iohs[wd_data];
   1211 		wdcattach(wdc_cp);
   1212 	}
   1213 }
   1214