xref: /freebsd/sys/dev/ata/chipsets/ata-via.c (revision ebacd8013fe5f7fdf9f6a5b286f6680dd2891036)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer,
12  *    without modification, immediately at the beginning of the file.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/param.h>
33 #include <sys/module.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/ata.h>
37 #include <sys/bus.h>
38 #include <sys/endian.h>
39 #include <sys/malloc.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/sema.h>
43 #include <sys/taskqueue.h>
44 #include <vm/uma.h>
45 #include <machine/stdarg.h>
46 #include <machine/resource.h>
47 #include <machine/bus.h>
48 #include <sys/rman.h>
49 #include <dev/pci/pcivar.h>
50 #include <dev/pci/pcireg.h>
51 #include <dev/ata/ata-all.h>
52 #include <dev/ata/ata-pci.h>
53 #include <ata_if.h>
54 
55 /* local prototypes */
56 static int ata_via_chipinit(device_t dev);
57 static int ata_via_ch_attach(device_t dev);
58 static int ata_via_ch_detach(device_t dev);
59 static void ata_via_reset(device_t dev);
60 static int ata_via_status(device_t dev);
61 static int ata_via_old_setmode(device_t dev, int target, int mode);
62 static void ata_via_southbridge_fixup(device_t dev);
63 static int ata_via_new_setmode(device_t dev, int target, int mode);
64 static int ata_via_sata_ch_attach(device_t dev);
65 static int ata_via_sata_getrev(device_t dev, int target);
66 static int ata_via_sata_setmode(device_t dev, int target, int mode);
67 static void ata_via_sata_reset(device_t dev);
68 static int ata_via_sata_scr_read(device_t dev, int port, int reg,
69     u_int32_t *result);
70 static int ata_via_sata_scr_write(device_t dev, int port, int reg,
71     u_int32_t value);
72 static int ata_via_sata_status(device_t dev);
73 
74 /* misc defines */
75 #define VIA33           0
76 #define VIA66           1
77 #define VIA100          2
78 #define VIA133          3
79 
80 #define VIACLK          0x01
81 #define VIABUG          0x02
82 #define VIABAR          0x04
83 #define VIASATA         0x10
84 
85 /*
86  * VIA Technologies Inc. chipset support functions
87  */
88 static int
89 ata_via_probe(device_t dev)
90 {
91     struct ata_pci_controller *ctlr = device_get_softc(dev);
92     static const struct ata_chip_id ids[] =
93     {{ ATA_VIA82C586, 0x02, VIA33,  0x00,    ATA_UDMA2, "82C586B" },
94      { ATA_VIA82C586, 0x00, VIA33,  0x00,    ATA_WDMA2, "82C586" },
95      { ATA_VIA82C596, 0x12, VIA66,  VIACLK,  ATA_UDMA4, "82C596B" },
96      { ATA_VIA82C596, 0x00, VIA33,  0x00,    ATA_UDMA2, "82C596" },
97      { ATA_VIA82C686, 0x40, VIA100, VIABUG,  ATA_UDMA5, "82C686B"},
98      { ATA_VIA82C686, 0x10, VIA66,  VIACLK,  ATA_UDMA4, "82C686A" },
99      { ATA_VIA82C686, 0x00, VIA33,  0x00,    ATA_UDMA2, "82C686" },
100      { ATA_VIA8231,   0x00, VIA100, VIABUG,  ATA_UDMA5, "8231" },
101      { ATA_VIA8233,   0x00, VIA100, 0x00,    ATA_UDMA5, "8233" },
102      { ATA_VIA8233C,  0x00, VIA100, 0x00,    ATA_UDMA5, "8233C" },
103      { ATA_VIA8233A,  0x00, VIA133, 0x00,    ATA_UDMA6, "8233A" },
104      { ATA_VIA8235,   0x00, VIA133, 0x00,    ATA_UDMA6, "8235" },
105      { ATA_VIA8237,   0x00, VIA133, 0x00,    ATA_UDMA6, "8237" },
106      { ATA_VIA8237A,  0x00, VIA133, 0x00,    ATA_UDMA6, "8237A" },
107      { ATA_VIA8237S,  0x00, VIA133, 0x00,    ATA_UDMA6, "8237S" },
108      { ATA_VIA8237_5372, 0x00, VIA133, 0x00, ATA_UDMA6, "8237" },
109      { ATA_VIA8237_7372, 0x00, VIA133, 0x00, ATA_UDMA6, "8237" },
110      { ATA_VIA8251,   0x00, VIA133, 0x00,    ATA_UDMA6, "8251" },
111      { ATA_VIACX700,  0x00, VIA133, VIASATA, ATA_SA150, "CX700" },
112      { ATA_VIAVX800,  0x00, VIA133, VIASATA, ATA_SA150, "VX800" },
113      { ATA_VIAVX855,  0x00, VIA133, 0x00,    ATA_UDMA6, "VX855" },
114      { ATA_VIAVX900,  0x00, VIA133, VIASATA, ATA_SA300, "VX900" },
115      { 0, 0, 0, 0, 0, 0 }};
116     static const struct ata_chip_id new_ids[] =
117     {{ ATA_VIA6410,   0x00, 0,      0x00,    ATA_UDMA6, "6410" },
118      { ATA_VIA6420,   0x00, 7,      0x00,    ATA_SA150, "6420" },
119      { ATA_VIA6421,   0x00, 6,      VIABAR,  ATA_SA150, "6421" },
120      { ATA_VIA8237A,  0x00, 7,      0x00,    ATA_SA150, "8237A" },
121      { ATA_VIA8237S,  0x00, 7,      0x00,    ATA_SA150, "8237S" },
122      { ATA_VIA8237_5372, 0x00, 7,   0x00,    ATA_SA300, "8237" },
123      { ATA_VIA8237_7372, 0x00, 7,   0x00,    ATA_SA300, "8237" },
124      { 0, 0, 0, 0, 0, 0 }};
125 
126     if (pci_get_vendor(dev) != ATA_VIA_ID)
127 	return ENXIO;
128 
129     if (pci_get_devid(dev) == ATA_VIA82C571 ||
130 	pci_get_devid(dev) == ATA_VIACX700IDE ||
131 	pci_get_devid(dev) == ATA_VIASATAIDE ||
132 	pci_get_devid(dev) == ATA_VIASATAIDE2 ||
133 	pci_get_devid(dev) == ATA_VIASATAIDE3) {
134 	if (!(ctlr->chip = ata_find_chip(dev, ids, -99)))
135 	    return ENXIO;
136     }
137     else {
138 	if (!(ctlr->chip = ata_match_chip(dev, new_ids)))
139 	    return ENXIO;
140     }
141 
142     ata_set_desc(dev);
143     ctlr->chipinit = ata_via_chipinit;
144     return (BUS_PROBE_LOW_PRIORITY);
145 }
146 
147 static int
148 ata_via_chipinit(device_t dev)
149 {
150     struct ata_pci_controller *ctlr = device_get_softc(dev);
151 
152     if (ata_setup_interrupt(dev, ata_generic_intr))
153 	return ENXIO;
154 
155     /* 2 SATA with "SATA registers" at PCI config space + PATA on secondary */
156     if (ctlr->chip->cfg2 & VIASATA) {
157 	ctlr->ch_attach = ata_via_sata_ch_attach;
158 	ctlr->setmode = ata_via_sata_setmode;
159 	ctlr->getrev = ata_via_sata_getrev;
160 	ctlr->reset = ata_via_sata_reset;
161 	return 0;
162     }
163     /* Legacy SATA/SATA+PATA with SATA registers in BAR(5). */
164     if (ctlr->chip->max_dma >= ATA_SA150) {
165 	ctlr->r_type2 = SYS_RES_IOPORT;
166 	ctlr->r_rid2 = PCIR_BAR(5);
167 	if ((ctlr->r_res2 = bus_alloc_resource_any(dev, ctlr->r_type2,
168 						   &ctlr->r_rid2, RF_ACTIVE))) {
169 	    ctlr->ch_attach = ata_via_ch_attach;
170 	    ctlr->ch_detach = ata_via_ch_detach;
171 	    ctlr->reset = ata_via_reset;
172 	}
173 	if (ctlr->chip->cfg2 & VIABAR) {
174 	    ctlr->channels = 3;
175 	    ctlr->setmode = ata_via_new_setmode;
176 	} else
177 	    ctlr->setmode = ata_sata_setmode;
178 	ctlr->getrev = ata_sata_getrev;
179 	return 0;
180     }
181 
182     /* prepare for ATA-66 on the 82C686a and 82C596b */
183     if (ctlr->chip->cfg2 & VIACLK)
184 	pci_write_config(dev, 0x50, 0x030b030b, 4);
185 
186     /* the southbridge might need the data corruption fix */
187     if (ctlr->chip->cfg2 & VIABUG)
188 	ata_via_southbridge_fixup(dev);
189 
190     /* set fifo configuration half'n'half */
191     pci_write_config(dev, 0x43,
192 		     (pci_read_config(dev, 0x43, 1) & 0x90) | 0x2a, 1);
193 
194     /* set status register read retry */
195     pci_write_config(dev, 0x44, pci_read_config(dev, 0x44, 1) | 0x08, 1);
196 
197     /* set DMA read & end-of-sector fifo flush */
198     pci_write_config(dev, 0x46,
199 		     (pci_read_config(dev, 0x46, 1) & 0x0c) | 0xf0, 1);
200 
201     /* set sector size */
202     pci_write_config(dev, 0x60, DEV_BSIZE, 2);
203     pci_write_config(dev, 0x68, DEV_BSIZE, 2);
204 
205     ctlr->setmode = ata_via_old_setmode;
206     return 0;
207 }
208 
209 static int
210 ata_via_ch_attach(device_t dev)
211 {
212     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
213     struct ata_channel *ch = device_get_softc(dev);
214 
215     /* newer SATA chips has resources in one BAR for each channel */
216     if (ctlr->chip->cfg2 & VIABAR) {
217 	struct resource *r_io;
218 	int i, rid;
219 
220 	ata_pci_dmainit(dev);
221 
222 	rid = PCIR_BAR(ch->unit);
223 	if (!(r_io = bus_alloc_resource_any(device_get_parent(dev),
224 					    SYS_RES_IOPORT,
225 					    &rid, RF_ACTIVE)))
226 	    return ENXIO;
227 
228 	for (i = ATA_DATA; i <= ATA_COMMAND; i ++) {
229 	    ch->r_io[i].res = r_io;
230 	    ch->r_io[i].offset = i;
231 	}
232 	ch->r_io[ATA_CONTROL].res = r_io;
233 	ch->r_io[ATA_CONTROL].offset = 2 + ATA_IOSIZE;
234 	ch->r_io[ATA_IDX_ADDR].res = r_io;
235 	ata_default_registers(dev);
236 	for (i = ATA_BMCMD_PORT; i <= ATA_BMDTP_PORT; i++) {
237 	    ch->r_io[i].res = ctlr->r_res1;
238 	    ch->r_io[i].offset = (i - ATA_BMCMD_PORT)+(ch->unit * ATA_BMIOSIZE);
239 	}
240 	ata_pci_hw(dev);
241 	if (ch->unit >= 2)
242 	    return 0;
243     }
244     else {
245 	/* setup the usual register normal pci style */
246 	if (ata_pci_ch_attach(dev))
247 	    return ENXIO;
248     }
249 
250     ch->r_io[ATA_SSTATUS].res = ctlr->r_res2;
251     ch->r_io[ATA_SSTATUS].offset = (ch->unit << ctlr->chip->cfg1);
252     ch->r_io[ATA_SERROR].res = ctlr->r_res2;
253     ch->r_io[ATA_SERROR].offset = 0x04 + (ch->unit << ctlr->chip->cfg1);
254     ch->r_io[ATA_SCONTROL].res = ctlr->r_res2;
255     ch->r_io[ATA_SCONTROL].offset = 0x08 + (ch->unit << ctlr->chip->cfg1);
256     ch->hw.status = ata_via_status;
257     ch->flags |= ATA_NO_SLAVE;
258     ch->flags |= ATA_SATA;
259     ch->flags |= ATA_PERIODIC_POLL;
260 
261     ata_sata_scr_write(ch, -1, ATA_SERROR, 0xffffffff);
262 
263     return 0;
264 }
265 
266 static int
267 ata_via_ch_detach(device_t dev)
268 {
269     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
270     struct ata_channel *ch = device_get_softc(dev);
271 
272     /* newer SATA chips has resources in one BAR for each channel */
273     if (ctlr->chip->cfg2 & VIABAR) {
274 	int rid;
275 
276 	rid = PCIR_BAR(ch->unit);
277 	bus_release_resource(device_get_parent(dev),
278 	    SYS_RES_IOPORT, rid, ch->r_io[ATA_CONTROL].res);
279 
280 	ata_pci_dmafini(dev);
281     }
282     else {
283 	/* setup the usual register normal pci style */
284 	if (ata_pci_ch_detach(dev))
285 	    return ENXIO;
286     }
287 
288     return 0;
289 }
290 
291 static void
292 ata_via_reset(device_t dev)
293 {
294     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
295     struct ata_channel *ch = device_get_softc(dev);
296 
297     if ((ctlr->chip->cfg2 & VIABAR) && (ch->unit > 1))
298         ata_generic_reset(dev);
299     else {
300 	if (ata_sata_phy_reset(dev, -1, 1))
301 	    ata_generic_reset(dev);
302 	else
303 	    ch->devices = 0;
304     }
305 }
306 
307 static int
308 ata_via_status(device_t dev)
309 {
310 
311 	ata_sata_phy_check_events(dev, -1);
312 	return (ata_pci_status(dev));
313 }
314 
315 static int
316 ata_via_new_setmode(device_t dev, int target, int mode)
317 {
318 	device_t parent = device_get_parent(dev);
319 	struct ata_pci_controller *ctlr = device_get_softc(parent);
320 	struct ata_channel *ch = device_get_softc(dev);
321 
322 	if ((ctlr->chip->cfg2 & VIABAR) && (ch->unit > 1)) {
323 	    int piomode;
324     	    static const uint8_t pio_timings[] =
325 		{ 0xa8, 0x65, 0x65, 0x32, 0x20 };
326 	    static const uint8_t dma_timings[] =
327 		{ 0xee, 0xe8, 0xe6, 0xe4, 0xe2, 0xe1, 0xe0 };
328 
329 	    /* This chip can't do WDMA. */
330 	    if (mode >= ATA_WDMA0 && mode < ATA_UDMA0)
331 		mode = ATA_PIO4;
332 	    if (mode >= ATA_UDMA0) {
333 		pci_write_config(parent, 0xb3,
334 				 dma_timings[mode & ATA_MODE_MASK], 1);
335 		piomode = ATA_PIO4;
336 	    } else
337 		piomode = mode;
338 	    pci_write_config(parent, 0xab, pio_timings[ata_mode2idx(piomode)], 1);
339 	} else
340 		mode = ata_sata_setmode(dev, target, mode);
341 	return (mode);
342 }
343 
344 static int
345 ata_via_old_setmode(device_t dev, int target, int mode)
346 {
347 	device_t parent = device_get_parent(dev);
348 	struct ata_pci_controller *ctlr = device_get_softc(parent);
349 	struct ata_channel *ch = device_get_softc(dev);
350 	int devno = (ch->unit << 1) + target;
351 	int reg = 0x53 - devno;
352 	int piomode;
353 	static const uint8_t timings[] =
354 	    { 0xa8, 0x65, 0x42, 0x22, 0x20, 0xa8, 0x22, 0x20 };
355 	static const uint8_t modes[][7] = {
356 	    { 0xc2, 0xc1, 0xc0, 0x00, 0x00, 0x00, 0x00 },   /* VIA ATA33 */
357 	    { 0xee, 0xec, 0xea, 0xe9, 0xe8, 0x00, 0x00 },   /* VIA ATA66 */
358 	    { 0xf7, 0xf6, 0xf4, 0xf2, 0xf1, 0xf0, 0x00 },   /* VIA ATA100 */
359 	    { 0xf7, 0xf7, 0xf6, 0xf4, 0xf2, 0xf1, 0xf0 } }; /* VIA ATA133 */
360 
361 	mode = min(mode, ctlr->chip->max_dma);
362 	/* Set UDMA timings */
363 	if (mode >= ATA_UDMA0) {
364 	    pci_write_config(parent, reg,
365 			     modes[ctlr->chip->cfg1][mode & ATA_MODE_MASK], 1);
366 	    piomode = ATA_PIO4;
367 	} else {
368 	    pci_write_config(parent, reg, 0x8b, 1);
369 	    piomode = mode;
370 	}
371 	/* Set WDMA/PIO timings */
372 	pci_write_config(parent, reg - 0x08,timings[ata_mode2idx(piomode)], 1);
373 	return (mode);
374 }
375 
376 static void
377 ata_via_southbridge_fixup(device_t dev)
378 {
379     device_t *children;
380     int nchildren, i;
381 
382     if (device_get_children(device_get_parent(dev), &children, &nchildren))
383 	return;
384 
385     for (i = 0; i < nchildren; i++) {
386 	if (pci_get_devid(children[i]) == ATA_VIA8363 ||
387 	    pci_get_devid(children[i]) == ATA_VIA8371 ||
388 	    pci_get_devid(children[i]) == ATA_VIA8662 ||
389 	    pci_get_devid(children[i]) == ATA_VIA8361) {
390 	    u_int8_t reg76 = pci_read_config(children[i], 0x76, 1);
391 
392 	    if ((reg76 & 0xf0) != 0xd0) {
393 		device_printf(dev,
394 		"Correcting VIA config for southbridge data corruption bug\n");
395 		pci_write_config(children[i], 0x75, 0x80, 1);
396 		pci_write_config(children[i], 0x76, (reg76 & 0x0f) | 0xd0, 1);
397 	    }
398 	    break;
399 	}
400     }
401     free(children, M_TEMP);
402 }
403 
404 static int
405 ata_via_sata_ch_attach(device_t dev)
406 {
407 	struct ata_channel *ch = device_get_softc(dev);
408 
409 	if (ata_pci_ch_attach(dev))
410 		return ENXIO;
411 	if (ch->unit == 0) {
412 		ch->hw.status = ata_via_sata_status;
413 		ch->hw.pm_read = ata_via_sata_scr_read;
414 		ch->hw.pm_write = ata_via_sata_scr_write;
415 		ch->flags |= ATA_PERIODIC_POLL;
416 		ch->flags |= ATA_SATA;
417 		ata_sata_scr_write(ch, 0, ATA_SERROR, 0xffffffff);
418 		ata_sata_scr_write(ch, 1, ATA_SERROR, 0xffffffff);
419 	}
420 	return (0);
421 }
422 
423 static int
424 ata_via_sata_getrev(device_t dev, int target)
425 {
426 	device_t parent = device_get_parent(dev);
427 	struct ata_channel *ch = device_get_softc(dev);
428 
429 	if (ch->unit == 0) {
430 		if (pci_read_config(parent, 0xa0 + target, 1) & 0x10)
431 			return (2);
432 		else
433 			return (1);
434 	}
435 	return (0);
436 }
437 
438 static int
439 ata_via_sata_setmode(device_t dev, int target, int mode)
440 {
441 	struct ata_channel *ch = device_get_softc(dev);
442 
443 	if (ch->unit == 0)
444 		return (mode);
445 	return (ata_via_old_setmode(dev, target, mode));
446 }
447 
448 static void
449 ata_via_sata_reset(device_t dev)
450 {
451 	struct ata_channel *ch = device_get_softc(dev);
452 	int devs, count;
453 	uint8_t status;
454 
455 	if (ch->unit == 0) {
456 		devs = ata_sata_phy_reset(dev, 0, 0);
457 		count = 0;
458 		do {
459 			ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA |
460 			    ATA_DEV(ATA_MASTER));
461 			DELAY(1000);
462 			status = ATA_IDX_INB(ch, ATA_STATUS);
463 			count++;
464 		} while (status & ATA_S_BUSY && count < 100);
465 
466 		devs += ata_sata_phy_reset(dev, 1, 0);
467 		count = 0;
468 		do {
469 			ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA |
470 			    ATA_DEV(ATA_SLAVE));
471 			DELAY(1000);
472 			status = ATA_IDX_INB(ch, ATA_STATUS);
473 			count++;
474 		} while (status & ATA_S_BUSY && count < 100);
475 	} else
476 		devs = 1;
477 	if (devs)
478 		ata_generic_reset(dev);
479 	else
480 		ch->devices = 0;
481 }
482 
483 static int
484 ata_via_sata_scr_read(device_t dev, int port, int reg, u_int32_t *result)
485 {
486 	device_t parent;
487 	uint32_t val;
488 
489 	parent = device_get_parent(dev);
490 	port = (port == 1) ? 1 : 0;
491 	switch (reg) {
492 	case ATA_SSTATUS:
493 		val = pci_read_config(parent, 0xa0 + port, 1);
494 		*result = val & 0x03;
495 		if (*result != ATA_SS_DET_NO_DEVICE) {
496 			if (val & 0x04)
497 				*result |= ATA_SS_IPM_PARTIAL;
498 			else if (val & 0x08)
499 				*result |= ATA_SS_IPM_SLUMBER;
500 			else
501 				*result |= ATA_SS_IPM_ACTIVE;
502 			if (val & 0x10)
503 				*result |= ATA_SS_SPD_GEN2;
504 			else
505 				*result |= ATA_SS_SPD_GEN1;
506 		}
507 		break;
508 	case ATA_SERROR:
509 		*result = pci_read_config(parent, 0xa8 + port * 4, 4);
510 		break;
511 	case ATA_SCONTROL:
512 		val = pci_read_config(parent, 0xa4 + port, 1);
513 		*result = 0;
514 		if (val & 0x01)
515 			*result |= ATA_SC_DET_RESET;
516 		if (val & 0x02)
517 			*result |= ATA_SC_DET_DISABLE;
518 		if (val & 0x04)
519 			*result |= ATA_SC_IPM_DIS_PARTIAL;
520 		if (val & 0x08)
521 			*result |= ATA_SC_IPM_DIS_SLUMBER;
522 		break;
523 	default:
524 		return (EINVAL);
525 	}
526 	return (0);
527 }
528 
529 static int
530 ata_via_sata_scr_write(device_t dev, int port, int reg, u_int32_t value)
531 {
532 	device_t parent;
533 	uint32_t val;
534 
535 	parent = device_get_parent(dev);
536 	port = (port == 1) ? 1 : 0;
537 	switch (reg) {
538 	case ATA_SERROR:
539 		pci_write_config(parent, 0xa8 + port * 4, value, 4);
540 		break;
541 	case ATA_SCONTROL:
542 		val = 0;
543 		if (value & ATA_SC_DET_RESET)
544 			val |= 0x01;
545 		if (value & ATA_SC_DET_DISABLE)
546 			val |= 0x02;
547 		if (value & ATA_SC_IPM_DIS_PARTIAL)
548 			val |= 0x04;
549 		if (value & ATA_SC_IPM_DIS_SLUMBER)
550 			val |= 0x08;
551 		pci_write_config(parent, 0xa4 + port, val, 1);
552 		break;
553 	default:
554 		return (EINVAL);
555 	}
556 	return (0);
557 }
558 
559 static int
560 ata_via_sata_status(device_t dev)
561 {
562 
563 	ata_sata_phy_check_events(dev, 0);
564 	ata_sata_phy_check_events(dev, 1);
565 	return (ata_pci_status(dev));
566 }
567 
568 ATA_DECLARE_DRIVER(ata_via);
569