ata-dma.c revision 87951
1/*-
2 * Copyright (c) 1998,1999,2000,2001 S�ren Schmidt <sos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification, immediately at the beginning of the file.
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. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
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 * $FreeBSD: head/sys/dev/ata/ata-dma.c 87951 2001-12-14 21:28:49Z sos $
29 */
30
31#include "pci.h"
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/ata.h>
35#include <sys/bio.h>
36#include <sys/malloc.h>
37#include <sys/bus.h>
38#include <sys/disk.h>
39#include <sys/devicestat.h>
40#include <vm/vm.h>
41#include <vm/pmap.h>
42#include <pci/pcivar.h>
43#include <machine/bus.h>
44#include <sys/rman.h>
45#include <dev/ata/ata-all.h>
46
47/* prototypes */
48static void cyrix_timing(struct ata_softc *, int, int);
49static void promise_timing(struct ata_softc *, int, int);
50static void hpt_timing(struct ata_softc *, int, int);
51
52/* misc defines */
53#ifdef __alpha__
54#undef vtophys
55#define vtophys(va)	alpha_XXX_dmamap((vm_offset_t)va)
56#endif
57#define ATAPI_DEVICE(scp, device) \
58	((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) || \
59	 (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
60
61
62void *
63ata_dmaalloc(struct ata_softc *scp, int device)
64{
65    void *dmatab;
66
67    if ((dmatab = malloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT))) {
68	if (((uintptr_t)dmatab >> PAGE_SHIFT) ^
69	    (((uintptr_t)dmatab + PAGE_SIZE - 1) >> PAGE_SHIFT)) {
70	    ata_printf(scp, device, "dmatab crosses page boundary, no DMA\n");
71	    free(dmatab, M_DEVBUF);
72	    dmatab = NULL;
73	}
74    }
75    return dmatab;
76}
77
78void
79ata_dmainit(struct ata_softc *scp, int device,
80	    int apiomode, int wdmamode, int udmamode)
81{
82    device_t parent = device_get_parent(scp->dev);
83    int devno = (scp->channel << 1) + ATA_DEV(device);
84    int error;
85
86    /* set our most pessimistic default mode */
87    scp->mode[ATA_DEV(device)] = ATA_PIO;
88
89    if (!scp->r_bmio)
90	return;
91
92    /* if simplex controller, only allow DMA on primary channel */
93    if (scp->channel == 1) {
94	ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
95		 ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) &
96		 (ATA_BMSTAT_DMA_MASTER | ATA_BMSTAT_DMA_SLAVE));
97	if (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) & ATA_BMSTAT_DMA_SIMPLEX) {
98	    ata_printf(scp, device, "simplex device, DMA on primary only\n");
99	    return;
100	}
101    }
102
103    /* DMA engine address alignment is usually 1 word (2 bytes) */
104    scp->alignment = 0x1;
105
106#if 1
107    if (udmamode > 2 && !ATA_PARAM(scp, device)->hwres_cblid) {
108	ata_printf(scp, device,
109		   "DMA limited to UDMA33, non-ATA66 compliant cable\n");
110	udmamode = 2;
111    }
112#endif
113    switch (scp->chiptype) {
114
115    case 0x248a8086:	/* Intel ICH3 mobile */
116    case 0x248b8086:	/* Intel ICH3 */
117    case 0x244a8086:	/* Intel ICH2 mobile */
118    case 0x244b8086:	/* Intel ICH2 */
119	if (udmamode >= 5) {
120	    int32_t mask48, new48;
121	    int16_t word54;
122
123	    word54 = pci_read_config(parent, 0x54, 2);
124	    if (word54 & (0x10 << devno)) {
125	        error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
126				    ATA_UDMA5,  ATA_C_F_SETXFER,ATA_WAIT_READY);
127	    	if (bootverbose)
128		    ata_printf(scp, device,
129			       "%s setting UDMA5 on Intel chip\n",
130			       (error) ? "failed" : "success");
131		if (!error) {
132		    mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
133		    new48 = (1 << devno) + (1 << (16 + (devno << 2)));
134		    pci_write_config(parent, 0x48,
135				     (pci_read_config(parent, 0x48, 4) &
136				     ~mask48) | new48, 4);
137	    	    pci_write_config(parent, 0x54, word54 | (0x1000<<devno), 2);
138		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
139		    return;
140		}
141	    }
142	}
143	/* make sure eventual ATA100 mode from the BIOS is disabled */
144	pci_write_config(parent, 0x54,
145			 pci_read_config(parent, 0x54, 2) & ~(0x1000<<devno),2);
146	/* FALLTHROUGH */
147
148    case 0x24118086:    /* Intel ICH */
149    case 0x76018086:    /* Intel ICH */
150	if (udmamode >= 4) {
151	    int32_t mask48, new48;
152	    int16_t word54;
153
154	    word54 = pci_read_config(parent, 0x54, 2);
155	    if (word54 & (0x10 << devno)) {
156	        error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
157				    ATA_UDMA4,  ATA_C_F_SETXFER,ATA_WAIT_READY);
158	    	if (bootverbose)
159		    ata_printf(scp, device,
160			       "%s setting UDMA4 on Intel chip\n",
161			       (error) ? "failed" : "success");
162		if (!error) {
163		    mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
164		    new48 = (1 << devno) + (2 << (16 + (devno << 2)));
165		    pci_write_config(parent, 0x48,
166				     (pci_read_config(parent, 0x48, 4) &
167				     ~mask48) | new48, 4);
168		    pci_write_config(parent, 0x54, word54 | (1 << devno), 2);
169		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
170		    return;
171		}
172	    }
173	}
174	/* make sure eventual ATA66 mode from the BIOS is disabled */
175	pci_write_config(parent, 0x54,
176			 pci_read_config(parent, 0x54, 2) & ~(1 << devno), 2);
177	/* FALLTHROUGH */
178
179    case 0x71118086:	/* Intel PIIX4 */
180    case 0x84CA8086:	/* Intel PIIX4 */
181    case 0x71998086:	/* Intel PIIX4e */
182    case 0x24218086:	/* Intel ICH0 */
183	if (udmamode >= 2) {
184	    int32_t mask48, new48;
185
186	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
187				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
188	    if (bootverbose)
189		ata_printf(scp, device, "%s setting UDMA2 on Intel chip\n",
190			   (error) ? "failed" : "success");
191	    if (!error) {
192		mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
193		new48 = (1 << devno) + (2 << (16 + (devno << 2)));
194		pci_write_config(parent, 0x48,
195				 (pci_read_config(parent, 0x48, 4) &
196				 ~mask48) | new48, 4);
197		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
198		return;
199	    }
200	}
201	/* make sure eventual ATA33 mode from the BIOS is disabled */
202	pci_write_config(parent, 0x48,
203			 pci_read_config(parent, 0x48, 4) & ~(1 << devno), 4);
204	/* FALLTHROUGH */
205
206    case 0x70108086:	/* Intel PIIX3 */
207	if (wdmamode >= 2 && apiomode >= 4) {
208	    int32_t mask40, new40, mask44, new44;
209
210	    /* if SITRE not set doit for both channels */
211	    if (!((pci_read_config(parent,0x40,4)>>(scp->channel<<8))&0x4000)) {
212		new40 = pci_read_config(parent, 0x40, 4);
213		new44 = pci_read_config(parent, 0x44, 4);
214		if (!(new40 & 0x00004000)) {
215		    new44 &= ~0x0000000f;
216		    new44 |= ((new40&0x00003000)>>10)|((new40&0x00000300)>>8);
217		}
218		if (!(new40 & 0x40000000)) {
219		    new44 &= ~0x000000f0;
220		    new44 |= ((new40&0x30000000)>>22)|((new40&0x03000000)>>20);
221		}
222		new40 |= 0x40004000;
223		pci_write_config(parent, 0x40, new40, 4);
224		pci_write_config(parent, 0x44, new44, 4);
225	    }
226	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
227				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
228	    if (bootverbose)
229		ata_printf(scp, device, "%s setting WDMA2 on Intel chip\n",
230			   (error) ? "failed" : "success");
231	    if (!error) {
232		if (device == ATA_MASTER) {
233		    mask40 = 0x0000330f;
234		    new40 = 0x00002307;
235		    mask44 = 0;
236		    new44 = 0;
237		}
238		else {
239		    mask40 = 0x000000f0;
240		    new40 = 0x00000070;
241		    mask44 = 0x0000000f;
242		    new44 = 0x0000000b;
243		}
244		if (scp->channel) {
245		    mask40 <<= 16;
246		    new40 <<= 16;
247		    mask44 <<= 4;
248		    new44 <<= 4;
249		}
250		pci_write_config(parent, 0x40,
251				 (pci_read_config(parent, 0x40, 4) & ~mask40)|
252 				 new40, 4);
253		pci_write_config(parent, 0x44,
254				 (pci_read_config(parent, 0x44, 4) & ~mask44)|
255 				 new44, 4);
256		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
257		return;
258	    }
259	}
260	/* we could set PIO mode timings, but we assume the BIOS did that */
261	break;
262
263    case 0x12308086:	/* Intel PIIX */
264	if (wdmamode >= 2 && apiomode >= 4) {
265	    int32_t word40;
266
267	    word40 = pci_read_config(parent, 0x40, 4);
268	    word40 >>= scp->channel * 16;
269
270	    /* Check for timing config usable for DMA on controller */
271	    if (!((word40 & 0x3300) == 0x2300 &&
272		  ((word40 >> (device == ATA_MASTER ? 0 : 4)) & 1) == 1))
273		break;
274
275	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
276				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
277	    if (bootverbose)
278		ata_printf(scp, device,
279			   "%s setting WDMA2 on Intel chip\n",
280			   (error) ? "failed" : "success");
281	    if (!error) {
282		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
283		return;
284	    }
285	}
286	break;
287
288    case 0x522910b9:	/* AcerLabs Aladdin IV/V */
289	/* the older Aladdin doesn't support ATAPI DMA on both master & slave */
290	if (pci_get_revid(parent) < 0xc2 &&
291	    scp->devices & ATA_ATAPI_MASTER && scp->devices & ATA_ATAPI_SLAVE) {
292	    ata_printf(scp, device,
293		       "Aladdin: two atapi devices on this channel, no DMA\n");
294	    break;
295	}
296	if (udmamode >= 5 && pci_get_revid(parent) >= 0xc4) {
297	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
298				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
299	    if (bootverbose)
300		ata_printf(scp, device,
301			   "%s setting UDMA5 on Acer chip\n",
302			   (error) ? "failed" : "success");
303	    if (!error) {
304		int32_t word54 = pci_read_config(parent, 0x54, 4);
305
306		pci_write_config(parent, 0x4b,
307				 pci_read_config(parent, 0x4b, 1) | 0x01, 1);
308		word54 &= ~(0x000f000f << (devno << 2));
309		word54 |= (0x000f0005 << (devno << 2));
310		pci_write_config(parent, 0x54, word54, 4);
311		pci_write_config(parent, 0x53,
312				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
313		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
314		return;
315	    }
316	}
317	if (udmamode >= 4 && pci_get_revid(parent) >= 0xc2) {
318	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
319				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
320	    if (bootverbose)
321		ata_printf(scp, device,
322			   "%s setting UDMA4 on Acer chip\n",
323			   (error) ? "failed" : "success");
324	    if (!error) {
325		int32_t word54 = pci_read_config(parent, 0x54, 4);
326
327		pci_write_config(parent, 0x4b,
328				 pci_read_config(parent, 0x4b, 1) | 0x01, 1);
329		word54 &= ~(0x000f000f << (devno << 2));
330		word54 |= (0x00080005 << (devno << 2));
331		pci_write_config(parent, 0x54, word54, 4);
332		pci_write_config(parent, 0x53,
333				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
334		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
335		return;
336	    }
337	}
338	if (udmamode >= 2 && pci_get_revid(parent) >= 0x20) {
339	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
340				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
341	    if (bootverbose)
342		ata_printf(scp, device,
343			   "%s setting UDMA2 on Acer chip\n",
344			   (error) ? "failed" : "success");
345	    if (!error) {
346		int32_t word54 = pci_read_config(parent, 0x54, 4);
347
348		word54 &= ~(0x000f000f << (devno << 2));
349		word54 |= (0x000a0005 << (devno << 2));
350		pci_write_config(parent, 0x54, word54, 4);
351		pci_write_config(parent, 0x53,
352				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
353		scp->flags |= ATA_ATAPI_DMA_RO;
354		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
355		return;
356	    }
357	}
358
359	/* make sure eventual UDMA mode from the BIOS is disabled */
360	pci_write_config(parent, 0x56, pci_read_config(parent, 0x56, 2) &
361				       ~(0x0008 << (devno << 2)), 2);
362
363	if (wdmamode >= 2 && apiomode >= 4) {
364	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
365				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
366	    if (bootverbose)
367		ata_printf(scp, device,
368			   "%s setting WDMA2 on Acer chip\n",
369			   (error) ? "failed" : "success");
370	    if (!error) {
371		pci_write_config(parent, 0x53,
372				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
373		scp->flags |= ATA_ATAPI_DMA_RO;
374		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
375		return;
376	    }
377	}
378	pci_write_config(parent, 0x53,
379			 (pci_read_config(parent, 0x53, 1) & ~0x01) | 0x02, 1);
380	/* we could set PIO mode timings, but we assume the BIOS did that */
381	break;
382
383    case 0x74111022:	/* AMD 766 */
384	if (udmamode >= 5) {
385	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
386				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
387	    if (bootverbose)
388		ata_printf(scp, device,
389			   "%s setting UDMA5 on AMD chip\n",
390			   (error) ? "failed" : "success");
391	    if (!error) {
392	        pci_write_config(parent, 0x53 - devno, 0xc6, 1);
393		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
394		return;
395	    }
396	}
397	/* FALLTHROUGH */
398
399    case 0x74091022:	/* AMD 756 */
400	if (udmamode >= 4) {
401	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
402				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
403	    if (bootverbose)
404		ata_printf(scp, device,
405			   "%s setting UDMA4 on AMD chip\n",
406			   (error) ? "failed" : "success");
407	    if (!error) {
408	        pci_write_config(parent, 0x53 - devno, 0xc5, 1);
409		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
410		return;
411	    }
412	}
413	goto via_82c586;
414
415    case 0x05711106:	/* VIA 82C571, 82C586, 82C596, 82C686 */
416	if (ata_find_dev(parent, 0x06861106, 0x40) ||
417	    ata_find_dev(parent, 0x82311106, 0) ||
418	    ata_find_dev(parent, 0x30741106, 0)) {		/* 82C686b */
419	    if (udmamode >= 5) {
420		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
421				    ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
422		if (bootverbose)
423		    ata_printf(scp, device,
424			       "%s setting UDMA5 on VIA chip\n",
425			       (error) ? "failed" : "success");
426		if (!error) {
427		    pci_write_config(parent, 0x53 - devno, 0xf0, 1);
428		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
429		    return;
430		}
431	    }
432	    if (udmamode >= 4) {
433		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
434				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
435		if (bootverbose)
436		    ata_printf(scp, device,
437			       "%s setting UDMA4 on VIA chip\n",
438			       (error) ? "failed" : "success");
439		if (!error) {
440		    pci_write_config(parent, 0x53 - devno, 0xf1, 1);
441		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
442		    return;
443		}
444	    }
445	    if (udmamode >= 2) {
446		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
447				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
448		if (bootverbose)
449		    ata_printf(scp, device,
450			       "%s setting UDMA2 on VIA chip\n",
451			       (error) ? "failed" : "success");
452		if (!error) {
453		    pci_write_config(parent, 0x53 - devno, 0xf4, 1);
454		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
455		    return;
456		}
457	    }
458	}
459	else if (ata_find_dev(parent, 0x06861106, 0) ||		/* 82C686a */
460		 ata_find_dev(parent, 0x05961106, 0x12)) {	/* 82C596b */
461	    if (udmamode >= 4) {
462		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
463				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
464		if (bootverbose)
465		    ata_printf(scp, device,
466			       "%s setting UDMA4 on VIA chip\n",
467			       (error) ? "failed" : "success");
468		if (!error) {
469		    pci_write_config(parent, 0x53 - devno, 0xe8, 1);
470		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
471		    return;
472		}
473	    }
474	    if (udmamode >= 2) {
475		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
476				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
477		if (bootverbose)
478		    ata_printf(scp, device,
479			       "%s setting UDMA2 on VIA chip\n",
480			       (error) ? "failed" : "success");
481		if (!error) {
482		    pci_write_config(parent, 0x53 - devno, 0xea, 1);
483		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
484		    return;
485		}
486	    }
487	}
488	else if (ata_find_dev(parent, 0x05961106, 0) ||		/* 82C596a */
489		 ata_find_dev(parent, 0x05861106, 0x03)) {	/* 82C586b */
490via_82c586:
491	    if (udmamode >= 2) {
492		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
493				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
494		if (bootverbose)
495		    ata_printf(scp, device, "%s setting UDMA2 on %s chip\n",
496			       (error) ? "failed" : "success",
497			       ((scp->chiptype == 0x74091022) ||
498				(scp->chiptype == 0x74111022)) ? "AMD" : "VIA");
499		if (!error) {
500	            pci_write_config(parent, 0x53 - devno, 0xc0, 1);
501		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
502		    return;
503		}
504	    }
505	}
506	if (wdmamode >= 2 && apiomode >= 4) {
507	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
508				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
509	    if (bootverbose)
510		ata_printf(scp, device, "%s setting WDMA2 on %s chip\n",
511			   (error) ? "failed" : "success",
512			   (scp->chiptype == 0x74091022) ? "AMD" : "VIA");
513	    if (!error) {
514	        pci_write_config(parent, 0x53 - devno, 0x0b, 1);
515	        pci_write_config(parent, 0x4b - devno, 0x31, 1);
516		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
517		return;
518	    }
519	}
520	/* we could set PIO mode timings, but we assume the BIOS did that */
521	break;
522
523    case 0x55131039:	/* SiS 5591 */
524	if (ata_find_dev(parent, 0x06301039, 0x30) || 	/* SiS 630 */
525	    ata_find_dev(parent, 0x06331039, 0x00) || 	/* SiS 633 */
526	    ata_find_dev(parent, 0x06351039, 0x00) || 	/* SiS 635 */
527	    ata_find_dev(parent, 0x06451039, 0x00) || 	/* SiS 635 */
528	    ata_find_dev(parent, 0x07301039, 0x00) || 	/* SiS 730 */
529	    ata_find_dev(parent, 0x07331039, 0x00) || 	/* SiS 733 */
530	    ata_find_dev(parent, 0x07351039, 0x00)) { 	/* SiS 735 */
531	    int8_t reg = 0x40 + (devno << 1);
532	    int16_t val = pci_read_config(parent, reg, 2) & 0x0fff;
533
534	    if (udmamode >= 5) {
535		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
536				    ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
537		if (bootverbose)
538		    ata_printf(scp, device,
539			       "%s setting UDMA5 on SiS chip\n",
540			       (error) ? "failed" : "success");
541		if (!error) {
542		    pci_write_config(parent, reg, val | 0x8000, 2);
543		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
544		    return;
545		}
546	    }
547	    if (udmamode >= 4) {
548		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
549				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
550		if (bootverbose)
551		    ata_printf(scp, device,
552			       "%s setting UDMA4 on SiS chip\n",
553			       (error) ? "failed" : "success");
554		if (!error) {
555		    pci_write_config(parent, reg, val | 0x9000, 2);
556		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
557		    return;
558		}
559	    }
560	    if (udmamode >= 2) {
561		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
562				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
563		if (bootverbose)
564		    ata_printf(scp, device,
565			       "%s setting UDMA2 on SiS chip\n",
566			       (error) ? "failed" : "success");
567		if (!error) {
568		    pci_write_config(parent, reg, val | 0xb000, 2);
569		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
570		    return;
571		}
572	    }
573	} else if (ata_find_dev(parent, 0x05301039, 0) || /* SiS 530 */
574		   ata_find_dev(parent, 0x05401039, 0) || /* SiS 540 */
575		   ata_find_dev(parent, 0x06201039, 0) || /* SiS 620 */
576		   ata_find_dev(parent, 0x06301039, 0)) { /* SiS 630 */
577	    int8_t reg = 0x40 + (devno << 1);
578	    int16_t val = pci_read_config(parent, reg, 2) & 0x0fff;
579
580	    if (udmamode >= 4) {
581		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
582				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
583		if (bootverbose)
584		    ata_printf(scp, device,
585			       "%s setting UDMA4 on SiS chip\n",
586			       (error) ? "failed" : "success");
587		if (!error) {
588		    pci_write_config(parent, reg, val | 0x9000, 2);
589		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
590		    return;
591		}
592	    }
593	    if (udmamode >= 2) {
594		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
595				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
596		if (bootverbose)
597		    ata_printf(scp, device,
598			       "%s setting UDMA2 on SiS chip\n",
599			       (error) ? "failed" : "success");
600		if (!error) {
601		    pci_write_config(parent, reg, val | 0xa000, 2);
602		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
603		    return;
604		}
605	    }
606	} else {	/* SiS 5591 */
607	    if (udmamode >= 2 && pci_get_revid(parent) > 0xc1) {
608		error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
609				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
610		if (bootverbose)
611		    ata_printf(scp, device,
612			       "%s setting UDMA2 on SiS chip\n",
613			       (error) ? "failed" : "success");
614		if (!error) {
615		    pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
616		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
617		    return;
618		}
619	    }
620	}
621	if (wdmamode >=2 && apiomode >= 4) {
622	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
623				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
624	    if (bootverbose)
625		ata_printf(scp, device,
626			   "%s setting WDMA2 on SiS chip\n",
627			   (error) ? "failed" : "success");
628	    if (!error) {
629		pci_write_config(parent, 0x40 + (devno << 1), 0x0301, 2);
630		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
631		return;
632	    }
633	}
634	/* we could set PIO mode timings, but we assume the BIOS did that */
635	break;
636
637    case 0x06491095:	/* CMD 649 ATA100 controller */
638	if (udmamode >= 5) {
639	    u_int8_t umode;
640
641	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
642				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
643	    if (bootverbose)
644		ata_printf(scp, device, "%s setting UDMA5 on CMD chip\n",
645			   (error) ? "failed" : "success");
646	    if (!error) {
647		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
648		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
649		umode |= (device == ATA_MASTER ? 0x05 : 0x0a);
650		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
651		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
652		return;
653	    }
654	}
655	/* FALLTHROUGH */
656
657    case 0x06481095:	/* CMD 648 ATA66 controller */
658	if (udmamode >= 4) {
659	    u_int8_t umode;
660
661	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
662				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
663	    if (bootverbose)
664		ata_printf(scp, device, "%s setting UDMA4 on CMD chip\n",
665			   (error) ? "failed" : "success");
666	    if (!error) {
667		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
668		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
669		umode |= (device == ATA_MASTER ? 0x15 : 0x4a);
670		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
671		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
672		return;
673	    }
674	}
675	if (udmamode >= 2) {
676	    u_int8_t umode;
677
678	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
679				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
680	    if (bootverbose)
681		ata_printf(scp, device, "%s setting UDMA2 on CMD chip\n",
682			   (error) ? "failed" : "success");
683	    if (!error) {
684		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
685		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
686		umode |= (device == ATA_MASTER ? 0x11 : 0x42);
687		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
688		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
689		return;
690	    }
691	}
692	/* make sure eventual UDMA mode from the BIOS is disabled */
693	pci_write_config(parent, scp->channel ? 0x7b : 0x73,
694			 pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1)&
695			 ~(device == ATA_MASTER ? 0x35 : 0xca), 1);
696	/* FALLTHROUGH */
697
698    case 0x06461095:	/* CMD 646 ATA controller */
699	if (wdmamode >= 2 && apiomode >= 4) {
700	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
701				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
702	    if (bootverbose)
703		ata_printf(scp, device, "%s setting WDMA2 on CMD chip\n",
704			   error ? "failed" : "success");
705	    if (!error) {
706		int32_t offset = (devno < 3) ? (devno << 1) : 7;
707
708		pci_write_config(parent, 0x54 + offset, 0x3f, 1);
709		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
710		return;
711	    }
712	}
713	/* we could set PIO mode timings, but we assume the BIOS did that */
714	break;
715
716    case 0xc6931080:	/* Cypress 82c693 ATA controller */
717	if (wdmamode >= 2 && apiomode >= 4) {
718	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
719				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
720	    if (bootverbose)
721		ata_printf(scp, device,
722			   "%s setting WDMA2 on Cypress chip\n",
723			   error ? "failed" : "success");
724	    if (!error) {
725		pci_write_config(scp->dev, scp->channel ? 0x4e:0x4c, 0x2020, 2);
726		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
727		return;
728	    }
729	}
730	/* we could set PIO mode timings, but we assume the BIOS did that */
731	break;
732
733    case 0x01021078:	/* Cyrix 5530 ATA33 controller */
734	scp->alignment = 0xf;	/* DMA engine requires 16 byte alignment */
735	if (udmamode >= 2) {
736	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
737				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
738	    if (bootverbose)
739		ata_printf(scp, device, "%s setting UDMA2 on Cyrix chip\n",
740			   (error) ? "failed" : "success");
741	    if (!error) {
742		cyrix_timing(scp, devno, ATA_UDMA2);
743		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
744		return;
745	    }
746	}
747	if (wdmamode >= 2 && apiomode >= 4) {
748	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
749				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
750	    if (bootverbose)
751		ata_printf(scp, device, "%s setting WDMA2 on Cyrix chip\n",
752			   (error) ? "failed" : "success");
753	    if (!error) {
754		cyrix_timing(scp, devno, ATA_WDMA2);
755		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
756		return;
757	    }
758	}
759	error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
760			    ATA_PIO0 + apiomode, ATA_C_F_SETXFER,
761			    ATA_WAIT_READY);
762	if (bootverbose)
763	    ata_printf(scp, device, "%s setting %s on Cyrix chip\n",
764		       (error) ? "failed" : "success",
765		       ata_mode2str(ATA_PIO0 + apiomode));
766	cyrix_timing(scp, devno, ATA_PIO0 + apiomode);
767	scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
768	return;
769
770    case 0x02111166:	/* ServerWorks ROSB4 ATA33 controller */
771	if (udmamode >= 2) {
772	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
773				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
774	    if (bootverbose)
775		ata_printf(scp, device,
776			   "%s setting UDMA2 on ServerWorks chip\n",
777			   (error) ? "failed" : "success");
778	    if (!error) {
779		u_int16_t reg56;
780
781		pci_write_config(parent, 0x54,
782				 pci_read_config(parent, 0x54, 1) |
783				 (0x01 << devno), 1);
784		reg56 = pci_read_config(parent, 0x56, 2);
785		reg56 &= ~(0xf << (devno * 4));
786		reg56 |= (0x2 << (devno * 4));
787		pci_write_config(parent, 0x56, reg56, 2);
788		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
789		return;
790	    }
791	}
792	if (wdmamode >= 2 && apiomode >= 4) {
793	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
794				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
795	    if (bootverbose)
796		ata_printf(scp, device,
797			   "%s setting WDMA2 on ServerWorks chip\n",
798			   (error) ? "failed" : "success");
799	    if (!error) {
800		int offset = (scp->channel * 2) + (device == ATA_MASTER);
801		int word44 = pci_read_config(parent, 0x44, 4);
802
803		pci_write_config(parent, 0x54,
804				 pci_read_config(parent, 0x54, 1) &
805				 ~(0x01 << devno), 1);
806		word44 &= ~(0xff << (offset << 8));
807		word44 |= (0x20 << (offset << 8));
808		pci_write_config(parent, 0x44, 0x20, 4);
809		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
810		return;
811	    }
812	}
813	/* we could set PIO mode timings, but we assume the BIOS did that */
814	break;
815
816    case 0x4d68105a:	/* Promise TX2 ATA100 controllers */
817    case 0x6268105a:	/* Promise TX2v2 ATA100 controllers */
818    case 0x4d69105a:	/* Promise ATA133 controllers */
819	ATA_OUTB(scp->r_bmio, ATA_BMDEVSPEC_0, 0x0b);
820	if (udmamode >= 4 && !(ATA_INB(scp->r_bmio, ATA_BMDEVSPEC_1) & 0x04)) {
821	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
822				ATA_UDMA + udmamode, ATA_C_F_SETXFER,
823				ATA_WAIT_READY);
824	    if (bootverbose)
825		ata_printf(scp, device, "%s setting %s on Promise chip\n",
826			   (error) ? "failed" : "success",
827			   ata_mode2str(ATA_UDMA + udmamode));
828	    if (!error) {
829		scp->mode[ATA_DEV(device)] = ATA_UDMA + udmamode;
830		return;
831	    }
832	}
833	if (udmamode >= 2) {
834	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
835				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
836	    if (bootverbose)
837		ata_printf(scp, device, "%s setting %s on Promise chip\n",
838			   (error) ? "failed" : "success", "UDMA2");
839	    if (!error) {
840		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
841		return;
842	    }
843	}
844	if (wdmamode >= 2 && apiomode >= 4) {
845	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
846				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
847	    if (bootverbose)
848		ata_printf(scp, device, "%s setting %s on Promise chip\n",
849			   (error) ? "failed" : "success", "WDMA2");
850	    if (!error) {
851		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
852		return;
853	    }
854	}
855	break;
856
857    case 0x4d30105a:	/* Promise Ultra/FastTrak 100 controllers */
858    case 0x0d30105a:	/* Promise OEM ATA100 controllers */
859	if (!ATAPI_DEVICE(scp, device) && udmamode >= 5 &&
860	    !(pci_read_config(parent, 0x50, 2)&(scp->channel ? 1<<11 : 1<<10))){
861	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
862				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
863	    if (bootverbose)
864		ata_printf(scp, device,
865			   "%s setting UDMA5 on Promise chip\n",
866			   (error) ? "failed" : "success");
867	    if (!error) {
868		promise_timing(scp, devno, ATA_UDMA5);
869		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
870		return;
871	    }
872	}
873	/* FALLTHROUGH */
874
875    case 0x4d38105a:	/* Promise Ultra/FastTrak 66 controllers */
876	if (!ATAPI_DEVICE(scp, device) && udmamode >= 4 &&
877	    !(pci_read_config(parent, 0x50, 2)&(scp->channel ? 1<<11 : 1<<10))){
878	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
879				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
880	    if (bootverbose)
881		ata_printf(scp, device,
882			   "%s setting UDMA4 on Promise chip\n",
883			   (error) ? "failed" : "success");
884	    if (!error) {
885		promise_timing(scp, devno, ATA_UDMA4);
886		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
887		return;
888	    }
889	}
890	/* FALLTHROUGH */
891
892    case 0x4d33105a:	/* Promise Ultra/FastTrak 33 controllers */
893	if (!ATAPI_DEVICE(scp, device) && udmamode >= 2) {
894	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
895				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
896	    if (bootverbose)
897		ata_printf(scp, device,
898			   "%s setting UDMA2 on Promise chip\n",
899			   (error) ? "failed" : "success");
900	    if (!error) {
901		promise_timing(scp, devno, ATA_UDMA2);
902		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
903		return;
904	    }
905	}
906	if (!ATAPI_DEVICE(scp, device) && wdmamode >= 2 && apiomode >= 4) {
907	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
908				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
909	    if (bootverbose)
910		ata_printf(scp, device,
911			   "%s setting WDMA2 on Promise chip\n",
912			   (error) ? "failed" : "success");
913	    if (!error) {
914		promise_timing(scp, devno, ATA_WDMA2);
915		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
916		return;
917	    }
918	}
919	error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
920			    ATA_PIO0 + apiomode,
921			    ATA_C_F_SETXFER, ATA_WAIT_READY);
922	if (bootverbose)
923	    ata_printf(scp, device,
924		       "%s setting PIO%d on Promise chip\n",
925		       (error) ? "failed" : "success",
926		       (apiomode >= 0) ? apiomode : 0);
927	promise_timing(scp, devno, ATA_PIO0 + apiomode);
928	scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
929	return;
930
931    case 0x00041103:	/* HighPoint HPT366/368/370/372 controllers */
932	if (!ATAPI_DEVICE(scp, device) &&
933	    udmamode >= 6 && pci_get_revid(parent) >= 0x05 &&
934	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
935	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
936				ATA_UDMA6, ATA_C_F_SETXFER, ATA_WAIT_READY);
937	    if (bootverbose)
938		ata_printf(scp, device,
939			   "%s setting UDMA6 on HighPoint chip\n",
940			   (error) ? "failed" : "success");
941	    if (!error) {
942		hpt_timing(scp, devno, ATA_UDMA6);
943		scp->mode[ATA_DEV(device)] = ATA_UDMA6;
944		return;
945	    }
946	}
947	if (!ATAPI_DEVICE(scp, device) &&
948	    udmamode >=5 && pci_get_revid(parent) >= 0x03 &&
949	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
950	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
951				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
952	    if (bootverbose)
953		ata_printf(scp, device,
954			   "%s setting UDMA5 on HighPoint chip\n",
955			   (error) ? "failed" : "success");
956	    if (!error) {
957		hpt_timing(scp, devno, ATA_UDMA5);
958		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
959		return;
960	    }
961	}
962	if (!ATAPI_DEVICE(scp, device) && udmamode >=4 &&
963	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
964	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
965				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
966	    if (bootverbose)
967		ata_printf(scp, device,
968			   "%s setting UDMA4 on HighPoint chip\n",
969			   (error) ? "failed" : "success");
970	    if (!error) {
971		hpt_timing(scp, devno, ATA_UDMA4);
972		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
973		return;
974	    }
975	}
976	if (!ATAPI_DEVICE(scp, device) && udmamode >= 2) {
977	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
978				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
979	    if (bootverbose)
980		ata_printf(scp, device,
981			   "%s setting UDMA2 on HighPoint chip\n",
982			   (error) ? "failed" : "success");
983	    if (!error) {
984		hpt_timing(scp, devno, ATA_UDMA2);
985		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
986		return;
987	    }
988	}
989	if (!ATAPI_DEVICE(scp, device) && wdmamode >= 2 && apiomode >= 4) {
990	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
991				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
992	    if (bootverbose)
993		ata_printf(scp, device,
994			   "%s setting WDMA2 on HighPoint chip\n",
995			   (error) ? "failed" : "success");
996	    if (!error) {
997		hpt_timing(scp, devno, ATA_WDMA2);
998		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
999		return;
1000	    }
1001	}
1002	error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
1003			    ATA_PIO0 + apiomode,
1004			    ATA_C_F_SETXFER, ATA_WAIT_READY);
1005	if (bootverbose)
1006	    ata_printf(scp, device, "%s setting PIO%d on HighPoint chip\n",
1007		       (error) ? "failed" : "success",
1008		       (apiomode >= 0) ? apiomode : 0);
1009	hpt_timing(scp, devno, ATA_PIO0 + apiomode);
1010	scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
1011	return;
1012
1013    default:		/* unknown controller chip */
1014	/* better not try generic DMA on ATAPI devices it almost never works */
1015	if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
1016	    (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
1017	    break;
1018
1019	/* if controller says its setup for DMA take the easy way out */
1020	/* the downside is we dont know what DMA mode we are in */
1021	if ((udmamode >= 0 || wdmamode > 1) &&
1022	    (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) &
1023	     ((device==ATA_MASTER) ?
1024	      ATA_BMSTAT_DMA_MASTER : ATA_BMSTAT_DMA_SLAVE))) {
1025	    scp->mode[ATA_DEV(device)] = ATA_DMA;
1026	    return;
1027	}
1028
1029	/* well, we have no support for this, but try anyways */
1030	if ((wdmamode >= 2 && apiomode >= 4) && scp->r_bmio) {
1031	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0,
1032				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
1033	    if (bootverbose)
1034		ata_printf(scp, device,
1035			   "%s setting WDMA2 on generic chip\n",
1036			   (error) ? "failed" : "success");
1037	    if (!error) {
1038		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
1039		return;
1040	    }
1041	}
1042    }
1043    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, ATA_PIO0 + apiomode,
1044			ATA_C_F_SETXFER,ATA_WAIT_READY);
1045    if (bootverbose)
1046	ata_printf(scp, device, "%s setting PIO%d on generic chip\n",
1047		   (error) ? "failed" : "success", apiomode < 0 ? 0 : apiomode);
1048    if (!error)
1049        scp->mode[ATA_DEV(device)] = ATA_PIO0 + apiomode;
1050    else {
1051	if (bootverbose)
1052	    ata_printf(scp, device, "using PIO mode set by BIOS\n");
1053        scp->mode[ATA_DEV(device)] = ATA_PIO;
1054    }
1055}
1056
1057int
1058ata_dmasetup(struct ata_softc *scp, int device, struct ata_dmaentry *dmatab,
1059	     caddr_t data, int32_t count)
1060{
1061    u_int32_t dma_count, dma_base;
1062    int i = 0;
1063
1064    if (((uintptr_t)data & scp->alignment) || (count & scp->alignment)) {
1065	ata_printf(scp, device, "non aligned DMA transfer attempted\n");
1066	return -1;
1067    }
1068
1069    if (!count) {
1070	ata_printf(scp, device, "zero length DMA transfer attempted\n");
1071	return -1;
1072    }
1073
1074    dma_base = vtophys(data);
1075    dma_count = min(count, (PAGE_SIZE - ((uintptr_t)data & PAGE_MASK)));
1076    data += dma_count;
1077    count -= dma_count;
1078
1079    while (count) {
1080	dmatab[i].base = dma_base;
1081	dmatab[i].count = (dma_count & 0xffff);
1082	i++;
1083	if (i >= ATA_DMA_ENTRIES) {
1084	    ata_printf(scp, device, "too many segments in DMA table\n");
1085	    return -1;
1086	}
1087	dma_base = vtophys(data);
1088	dma_count = min(count, PAGE_SIZE);
1089	data += min(count, PAGE_SIZE);
1090	count -= min(count, PAGE_SIZE);
1091    }
1092    dmatab[i].base = dma_base;
1093    dmatab[i].count = (dma_count & 0xffff) | ATA_DMA_EOT;
1094    return 0;
1095}
1096
1097void
1098ata_dmastart(struct ata_softc *scp, int device,
1099	     struct ata_dmaentry *dmatab, int dir)
1100{
1101    scp->flags |= ATA_DMA_ACTIVE;
1102    ATA_OUTL(scp->r_bmio, ATA_BMDTP_PORT, vtophys(dmatab));
1103    ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT, dir ? ATA_BMCMD_WRITE_READ : 0);
1104    ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
1105         (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) |
1106	  (ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR)));
1107    ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT,
1108	 ATA_INB(scp->r_bmio, ATA_BMCMD_PORT) | ATA_BMCMD_START_STOP);
1109}
1110
1111int
1112ata_dmadone(struct ata_softc *scp)
1113{
1114    int error;
1115
1116    ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT,
1117		ATA_INB(scp->r_bmio, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
1118    scp->flags &= ~ATA_DMA_ACTIVE;
1119    error = ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT);
1120    ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
1121	     error | ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
1122    return error & ATA_BMSTAT_MASK;
1123}
1124
1125int
1126ata_dmastatus(struct ata_softc *scp)
1127{
1128    return ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
1129}
1130
1131static void
1132cyrix_timing(struct ata_softc *scp, int devno, int mode)
1133{
1134    u_int32_t reg20 = 0x0000e132;
1135    u_int32_t reg24 = 0x00017771;
1136
1137    switch (mode) {
1138    case ATA_PIO0:	reg20 = 0x0000e132; break;
1139    case ATA_PIO1:	reg20 = 0x00018121; break;
1140    case ATA_PIO2:	reg20 = 0x00024020; break;
1141    case ATA_PIO3:	reg20 = 0x00032010; break;
1142    case ATA_PIO4:	reg20 = 0x00040010; break;
1143    case ATA_WDMA2:	reg24 = 0x00002020; break;
1144    case ATA_UDMA2:	reg24 = 0x00911030; break;
1145    }
1146    ATA_OUTL(scp->r_bmio, (devno << 3) + 0x20, reg20);
1147    ATA_OUTL(scp->r_bmio, (devno << 3) + 0x24, reg24);
1148}
1149
1150static void
1151promise_timing(struct ata_softc *scp, int devno, int mode)
1152{
1153    u_int32_t timing = 0;
1154    struct promise_timing {
1155	u_int8_t  pa:4;
1156	u_int8_t  prefetch:1;
1157	u_int8_t  iordy:1;
1158	u_int8_t  errdy:1;
1159	u_int8_t  syncin:1;
1160	u_int8_t  pb:5;
1161	u_int8_t  mb:3;
1162	u_int8_t  mc:4;
1163	u_int8_t  dmaw:1;
1164	u_int8_t  dmar:1;
1165	u_int8_t  iordyp:1;
1166	u_int8_t  dmarqp:1;
1167	u_int8_t  reserved:8;
1168    } *t = (struct promise_timing*)&timing;
1169
1170    t->iordy = 1; t->iordyp = 1;
1171    if (mode >= ATA_DMA) {
1172	t->prefetch = 1; t->errdy = 1; t->syncin = 1;
1173    }
1174
1175    switch (scp->chiptype) {
1176    case 0x4d33105a:  /* Promise Ultra/Fasttrak 33 */
1177	switch (mode) {
1178	default:
1179	case ATA_PIO0:  t->pa =  9; t->pb = 19; t->mb = 7; t->mc = 15; break;
1180	case ATA_PIO1:  t->pa =  5; t->pb = 12; t->mb = 7; t->mc = 15; break;
1181	case ATA_PIO2:  t->pa =  3; t->pb =  8; t->mb = 7; t->mc = 15; break;
1182	case ATA_PIO3:  t->pa =  2; t->pb =  6; t->mb = 7; t->mc = 15; break;
1183	case ATA_PIO4:  t->pa =  1; t->pb =  4; t->mb = 7; t->mc = 15; break;
1184	case ATA_WDMA2: t->pa =  3; t->pb =  7; t->mb = 3; t->mc =  3; break;
1185	case ATA_UDMA2: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1186	}
1187	break;
1188
1189    case 0x4d38105a:  /* Promise Ultra/Fasttrak 66 */
1190    case 0x4d30105a:  /* Promise Ultra/Fasttrak 100 */
1191    case 0x0d30105a:  /* Promise OEM ATA 100 */
1192	switch (mode) {
1193	default:
1194	case ATA_PIO0:  t->pa = 15; t->pb = 31; t->mb = 7; t->mc = 15; break;
1195	case ATA_PIO1:  t->pa = 10; t->pb = 24; t->mb = 7; t->mc = 15; break;
1196	case ATA_PIO2:  t->pa =  6; t->pb = 16; t->mb = 7; t->mc = 15; break;
1197	case ATA_PIO3:  t->pa =  4; t->pb = 12; t->mb = 7; t->mc = 15; break;
1198	case ATA_PIO4:  t->pa =  2; t->pb =  8; t->mb = 7; t->mc = 15; break;
1199	case ATA_WDMA2: t->pa =  6; t->pb = 14; t->mb = 6; t->mc =  6; break;
1200	case ATA_UDMA2: t->pa =  6; t->pb = 14; t->mb = 2; t->mc =  2; break;
1201	case ATA_UDMA4: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1202	case ATA_UDMA5: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1203	}
1204	break;
1205    }
1206    pci_write_config(device_get_parent(scp->dev), 0x60 + (devno<<2), timing, 4);
1207}
1208
1209static void
1210hpt_timing(struct ata_softc *scp, int devno, int mode)
1211{
1212    device_t parent = device_get_parent(scp->dev);
1213    u_int32_t timing;
1214    if (pci_get_revid(parent) >= 0x05) {	/* HPT372 */
1215	switch (mode) {
1216	case ATA_PIO0:  timing = 0x0d029d5e; break;
1217	case ATA_PIO1:  timing = 0x0d029d26; break;
1218	case ATA_PIO2:  timing = 0x0c829ca6; break;
1219	case ATA_PIO3:  timing = 0x0c829c84; break;
1220	case ATA_PIO4:  timing = 0x0c829c62; break;
1221	case ATA_WDMA2: timing = 0x2c829262; break;
1222	case ATA_UDMA2:	timing = 0x1c91dc62; break;
1223	case ATA_UDMA4:	timing = 0x1c8ddc62; break;
1224	case ATA_UDMA5:	timing = 0x1c6ddc62; break;
1225	case ATA_UDMA6:	timing = 0x1c81dc62; break;
1226	default:	timing = 0x0d029d5e;
1227	}
1228	pci_write_config(parent, 0x40 + (devno << 2) , timing, 4);
1229	pci_write_config(parent, 0x5b, 0x20, 1);
1230    }
1231    else if (pci_get_revid(parent) >= 0x03) {	/* HPT370 */
1232	switch (mode) {
1233	case ATA_PIO0:	timing = 0x06914e57; break;
1234	case ATA_PIO1:	timing = 0x06914e43; break;
1235	case ATA_PIO2:	timing = 0x06514e33; break;
1236	case ATA_PIO3:	timing = 0x06514e22; break;
1237	case ATA_PIO4:	timing = 0x06514e21; break;
1238	case ATA_WDMA2:	timing = 0x26514e21; break;
1239	case ATA_UDMA2:	timing = 0x16494e31; break;
1240	case ATA_UDMA4:	timing = 0x16454e31; break;
1241	case ATA_UDMA5:	timing = 0x16454e31; break;
1242	default:	timing = 0x06514e57;
1243	}
1244	pci_write_config(parent, 0x40 + (devno << 2) , timing, 4);
1245	pci_write_config(parent, 0x5b, 0x22, 1);
1246    }
1247    else {					/* HPT36[68] */
1248	switch (pci_read_config(parent, 0x41 + (devno << 2), 1)) {
1249	case 0x85:	/* 25Mhz */
1250	    switch (mode) {
1251	    case ATA_PIO0:	timing = 0xc0d08585; break;
1252	    case ATA_PIO1:	timing = 0xc0d08572; break;
1253	    case ATA_PIO2:	timing = 0xc0ca8542; break;
1254	    case ATA_PIO3:	timing = 0xc0ca8532; break;
1255	    case ATA_PIO4:	timing = 0xc0ca8521; break;
1256	    case ATA_WDMA2:	timing = 0xa0ca8521; break;
1257	    case ATA_UDMA2:	timing = 0x90cf8521; break;
1258	    case ATA_UDMA4:	timing = 0x90c98521; break;
1259	    default:		timing = 0x01208585;
1260	    }
1261	    break;
1262	default:
1263	case 0xa7:	/* 33MHz */
1264	    switch (mode) {
1265	    case ATA_PIO0:	timing = 0xc0d0a7aa; break;
1266	    case ATA_PIO1:	timing = 0xc0d0a7a3; break;
1267	    case ATA_PIO2:	timing = 0xc0d0a753; break;
1268	    case ATA_PIO3:	timing = 0xc0c8a742; break;
1269	    case ATA_PIO4:	timing = 0xc0c8a731; break;
1270	    case ATA_WDMA2:	timing = 0xa0c8a731; break;
1271	    case ATA_UDMA2:	timing = 0x90caa731; break;
1272	    case ATA_UDMA4:	timing = 0x90c9a731; break;
1273	    default:		timing = 0x0120a7a7;
1274	    }
1275	    break;
1276	case 0xd9:	/* 40Mhz */
1277	    switch (mode) {
1278	    case ATA_PIO0:	timing = 0xc018d9d9; break;
1279	    case ATA_PIO1:	timing = 0xc010d9c7; break;
1280	    case ATA_PIO2:	timing = 0xc010d997; break;
1281	    case ATA_PIO3:	timing = 0xc010d974; break;
1282	    case ATA_PIO4:	timing = 0xc008d963; break;
1283	    case ATA_WDMA2:	timing = 0xa008d943; break;
1284	    case ATA_UDMA2:	timing = 0x900bd943; break;
1285	    case ATA_UDMA4:	timing = 0x900fd943; break;
1286	    default:		timing = 0x0120d9d9;
1287	    }
1288	}
1289	pci_write_config(parent, 0x40 + (devno << 2), (timing & ~0x80000000),4);
1290    }
1291}
1292