xref: /freebsd/sys/dev/ata/ata-dma.c (revision ce4946daa5ce852d28008dac492029500ab2ee95)
1 /*-
2  * Copyright (c) 1998,1999,2000,2001 S�ren Schmidt
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  * $FreeBSD$
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 */
48 static void cyrix_timing(struct ata_softc *, int, int);
49 static void promise_timing(struct ata_softc *, int, int);
50 static 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 
58 void *
59 ata_dmaalloc(struct ata_softc *scp, int device)
60 {
61     void *dmatab;
62 
63     if ((dmatab = malloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT))) {
64 	if (((uintptr_t)dmatab >> PAGE_SHIFT) ^
65 	    (((uintptr_t)dmatab + PAGE_SIZE - 1) >> PAGE_SHIFT)) {
66 	    ata_printf(scp, device, "dmatab crosses page boundary, no DMA\n");
67 	    free(dmatab, M_DEVBUF);
68 	    dmatab = NULL;
69 	}
70     }
71     return dmatab;
72 }
73 
74 void
75 ata_dmainit(struct ata_softc *scp, int device,
76 	    int apiomode, int wdmamode, int udmamode)
77 {
78     device_t parent = device_get_parent(scp->dev);
79     int devno = (scp->channel << 1) + ATA_DEV(device);
80     int error;
81 
82     /* set our most pessimistic default mode */
83     scp->mode[ATA_DEV(device)] = ATA_PIO;
84 
85     if (!scp->r_bmio)
86 	return;
87 
88     /* if simplex controller, only allow DMA on primary channel */
89     if (scp->channel == 1) {
90 	ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
91 		 ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) &
92 		 (ATA_BMSTAT_DMA_MASTER | ATA_BMSTAT_DMA_SLAVE));
93 	if (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) & ATA_BMSTAT_DMA_SIMPLEX) {
94 	    ata_printf(scp, device, "simplex device, DMA on primary only\n");
95 	    return;
96 	}
97     }
98 
99     /* DMA engine address alignment is usually 1 word (2 bytes) */
100     scp->alignment = 0x1;
101 
102     if (udmamode > 2 && !ATA_PARAM(scp, device)->cblid) {
103 	ata_printf(scp, device,
104 		   "DMA limited to UDMA33, non-ATA66 compliant cable\n");
105 	udmamode = 2;
106     }
107 
108     switch (scp->chiptype) {
109 
110     case 0x244a8086:	/* Intel ICH2 mobile */
111     case 0x244b8086:	/* Intel ICH2 */
112 	if (udmamode >= 5) {
113 	    int32_t mask48, new48;
114 	    int16_t word54;
115 
116 	    word54 = pci_read_config(parent, 0x54, 2);
117 	    if (word54 & (0x10 << devno)) {
118 	        error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
119 				    ATA_UDMA5,  ATA_C_F_SETXFER,ATA_WAIT_READY);
120 	    	if (bootverbose)
121 		    ata_printf(scp, device,
122 			       "%s setting UDMA5 on Intel chip\n",
123 			       (error) ? "failed" : "success");
124 		if (!error) {
125 		    mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
126 		    new48 = (1 << devno) + (1 << (16 + (devno << 2)));
127 		    pci_write_config(parent, 0x48,
128 				     (pci_read_config(parent, 0x48, 4) &
129 				     ~mask48) | new48, 4);
130 	    	    pci_write_config(parent, 0x54, word54 | (0x1000<<devno), 2);
131 		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
132 		    return;
133 		}
134 	    }
135 	}
136 	/* make sure eventual ATA100 mode from the BIOS is disabled */
137 	pci_write_config(parent, 0x54,
138 			 pci_read_config(parent, 0x54, 2) & ~(0x1000<<devno),2);
139 	/* FALLTHROUGH */
140 
141     case 0x24118086:    /* Intel ICH */
142 	if (udmamode >= 4) {
143 	    int32_t mask48, new48;
144 	    int16_t word54;
145 
146 	    word54 = pci_read_config(parent, 0x54, 2);
147 	    if (word54 & (0x10 << devno)) {
148 	        error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
149 				    ATA_UDMA4,  ATA_C_F_SETXFER,ATA_WAIT_READY);
150 	    	if (bootverbose)
151 		    ata_printf(scp, device,
152 			       "%s setting UDMA4 on Intel chip\n",
153 			       (error) ? "failed" : "success");
154 		if (!error) {
155 		    mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
156 		    new48 = (1 << devno) + (2 << (16 + (devno << 2)));
157 		    pci_write_config(parent, 0x48,
158 				     (pci_read_config(parent, 0x48, 4) &
159 				     ~mask48) | new48, 4);
160 		    pci_write_config(parent, 0x54, word54 | (1 << devno), 2);
161 		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
162 		    return;
163 		}
164 	    }
165 	}
166 	/* make sure eventual ATA66 mode from the BIOS is disabled */
167 	pci_write_config(parent, 0x54,
168 			 pci_read_config(parent, 0x54, 2) & ~(1 << devno), 2);
169 	/* FALLTHROUGH */
170 
171     case 0x71118086:	/* Intel PIIX4 */
172     case 0x71998086:	/* Intel PIIX4e */
173     case 0x24218086:	/* Intel ICH0 */
174 	if (udmamode >= 2) {
175 	    int32_t mask48, new48;
176 
177 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
178 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
179 	    if (bootverbose)
180 		ata_printf(scp, device, "%s setting UDMA2 on Intel chip\n",
181 			   (error) ? "failed" : "success");
182 	    if (!error) {
183 		mask48 = (1 << devno) + (3 << (16 + (devno << 2)));
184 		new48 = (1 << devno) + (2 << (16 + (devno << 2)));
185 		pci_write_config(parent, 0x48,
186 				 (pci_read_config(parent, 0x48, 4) &
187 				 ~mask48) | new48, 4);
188 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
189 		return;
190 	    }
191 	}
192 	/* make sure eventual ATA33 mode from the BIOS is disabled */
193 	pci_write_config(parent, 0x48,
194 			 pci_read_config(parent, 0x48, 4) & ~(1 << devno), 4);
195 	/* FALLTHROUGH */
196 
197     case 0x70108086:	/* Intel PIIX3 */
198 	if (wdmamode >= 2 && apiomode >= 4) {
199 	    int32_t mask40, new40, mask44, new44;
200 
201 	    /* if SITRE not set doit for both channels */
202 	    if (!((pci_read_config(parent,0x40,4)>>(scp->channel<<8))&0x4000)) {
203 		new40 = pci_read_config(parent, 0x40, 4);
204 		new44 = pci_read_config(parent, 0x44, 4);
205 		if (!(new40 & 0x00004000)) {
206 		    new44 &= ~0x0000000f;
207 		    new44 |= ((new40&0x00003000)>>10)|((new40&0x00000300)>>8);
208 		}
209 		if (!(new40 & 0x40000000)) {
210 		    new44 &= ~0x000000f0;
211 		    new44 |= ((new40&0x30000000)>>22)|((new40&0x03000000)>>20);
212 		}
213 		new40 |= 0x40004000;
214 		pci_write_config(parent, 0x40, new40, 4);
215 		pci_write_config(parent, 0x44, new44, 4);
216 	    }
217 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
218 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
219 	    if (bootverbose)
220 		ata_printf(scp, device, "%s setting WDMA2 on Intel chip\n",
221 			   (error) ? "failed" : "success");
222 	    if (!error) {
223 		if (device == ATA_MASTER) {
224 		    mask40 = 0x0000330f;
225 		    new40 = 0x00002307;
226 		    mask44 = 0;
227 		    new44 = 0;
228 		}
229 		else {
230 		    mask40 = 0x000000f0;
231 		    new40 = 0x00000070;
232 		    mask44 = 0x0000000f;
233 		    new44 = 0x0000000b;
234 		}
235 		if (scp->channel) {
236 		    mask40 <<= 16;
237 		    new40 <<= 16;
238 		    mask44 <<= 4;
239 		    new44 <<= 4;
240 		}
241 		pci_write_config(parent, 0x40,
242 				 (pci_read_config(parent, 0x40, 4) & ~mask40)|
243  				 new40, 4);
244 		pci_write_config(parent, 0x44,
245 				 (pci_read_config(parent, 0x44, 4) & ~mask44)|
246  				 new44, 4);
247 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
248 		return;
249 	    }
250 	}
251 	/* we could set PIO mode timings, but we assume the BIOS did that */
252 	break;
253 
254     case 0x12308086:	/* Intel PIIX */
255 	if (wdmamode >= 2 && apiomode >= 4) {
256 	    int32_t word40;
257 
258 	    word40 = pci_read_config(parent, 0x40, 4);
259 	    word40 >>= scp->channel * 16;
260 
261 	    /* Check for timing config usable for DMA on controller */
262 	    if (!((word40 & 0x3300) == 0x2300 &&
263 		  ((word40 >> (device == ATA_MASTER ? 0 : 4)) & 1) == 1))
264 		break;
265 
266 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
267 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
268 	    if (bootverbose)
269 		ata_printf(scp, device,
270 			   "%s setting WDMA2 on Intel chip\n",
271 			   (error) ? "failed" : "success");
272 	    if (!error) {
273 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
274 		return;
275 	    }
276 	}
277 	break;
278 
279     case 0x522910b9:	/* AcerLabs Aladdin IV/V */
280 	/* the older Aladdin doesn't support ATAPI DMA on both master & slave */
281 	if (pci_get_revid(parent) < 0xC2 &&
282 	    scp->devices & ATA_ATAPI_MASTER && scp->devices & ATA_ATAPI_SLAVE) {
283 	    ata_printf(scp, device,
284 		       "Aladdin: two atapi devices on this channel, no DMA\n");
285 	    break;
286 	}
287 	if (udmamode >= 5 && pci_get_revid(parent) >= 0xC4) {
288 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
289 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
290 	    if (bootverbose)
291 		ata_printf(scp, device,
292 			   "%s setting UDMA5 on Acer chip\n",
293 			   (error) ? "failed" : "success");
294 	    if (!error) {
295 		int32_t word54 = pci_read_config(parent, 0x54, 4);
296 
297 		pci_write_config(parent, 0x4b,
298 				 pci_read_config(parent, 0x4b, 1) | 0x01, 1);
299 		word54 &= ~(0x000f000f << (devno << 2));
300 		word54 |= (0x000f0005 << (devno << 2));
301 		pci_write_config(parent, 0x54, word54, 4);
302 		pci_write_config(parent, 0x53,
303 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
304 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
305 		return;
306 	    }
307 	}
308 	if (udmamode >= 4 && pci_get_revid(parent) >= 0xC2) {
309 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
310 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
311 	    if (bootverbose)
312 		ata_printf(scp, device,
313 			   "%s setting UDMA4 on Acer chip\n",
314 			   (error) ? "failed" : "success");
315 	    if (!error) {
316 		int32_t word54 = pci_read_config(parent, 0x54, 4);
317 
318 		pci_write_config(parent, 0x4b,
319 				 pci_read_config(parent, 0x4b, 1) | 0x01, 1);
320 		word54 &= ~(0x000f000f << (devno << 2));
321 		word54 |= (0x00080005 << (devno << 2));
322 		pci_write_config(parent, 0x54, word54, 4);
323 		pci_write_config(parent, 0x53,
324 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
325 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
326 		return;
327 	    }
328 	}
329 	if (udmamode >= 2 && pci_get_revid(parent) >= 0x20) {
330 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
331 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
332 	    if (bootverbose)
333 		ata_printf(scp, device,
334 			   "%s setting UDMA2 on Acer chip\n",
335 			   (error) ? "failed" : "success");
336 	    if (!error) {
337 		int32_t word54 = pci_read_config(parent, 0x54, 4);
338 
339 		word54 &= ~(0x000f000f << (devno << 2));
340 		word54 |= (0x000a0005 << (devno << 2));
341 		pci_write_config(parent, 0x54, word54, 4);
342 		pci_write_config(parent, 0x53,
343 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
344 		scp->flags |= ATA_ATAPI_DMA_RO;
345 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
346 		return;
347 	    }
348 	}
349 
350 	/* make sure eventual UDMA mode from the BIOS is disabled */
351 	pci_write_config(parent, 0x56, pci_read_config(parent, 0x56, 2) &
352 				       ~(0x0008 << (devno << 2)), 2);
353 
354 	if (wdmamode >= 2 && apiomode >= 4) {
355 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
356 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
357 	    if (bootverbose)
358 		ata_printf(scp, device,
359 			   "%s setting WDMA2 on Acer chip\n",
360 			   (error) ? "failed" : "success");
361 	    if (!error) {
362 		pci_write_config(parent, 0x53,
363 				 pci_read_config(parent, 0x53, 1) | 0x03, 1);
364 		scp->flags |= ATA_ATAPI_DMA_RO;
365 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
366 		return;
367 	    }
368 	}
369 	pci_write_config(parent, 0x53,
370 			 (pci_read_config(parent, 0x53, 1) & ~0x01) | 0x02, 1);
371 	/* we could set PIO mode timings, but we assume the BIOS did that */
372 	break;
373 
374     case 0x74091022:	/* AMD 756 */
375 	if (udmamode >= 4) {
376 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
377 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
378 	    if (bootverbose)
379 		ata_printf(scp, device,
380 			   "%s setting UDMA4 on AMD chip\n",
381 			   (error) ? "failed" : "success");
382 	    if (!error) {
383 	        pci_write_config(parent, 0x53 - devno, 0xc3, 1);
384 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
385 		return;
386 	    }
387 	}
388 	goto via_82c586;
389 
390     case 0x05711106:	/* VIA 82C571, 82C586, 82C596, 82C686 */
391 	if (ata_find_dev(parent, 0x06861106, 0x40)) {		/* 82C686b */
392 	    if (udmamode >= 5) {
393 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
394 				    ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
395 		if (bootverbose)
396 		    ata_printf(scp, device,
397 			       "%s setting UDMA5 on VIA chip\n",
398 			       (error) ? "failed" : "success");
399 		if (!error) {
400 		    pci_write_config(parent, 0x53 - devno, 0xf0, 1);
401 		    scp->mode[ATA_DEV(device)] = ATA_UDMA5;
402 		    return;
403 		}
404 	    }
405 	    if (udmamode >= 4) {
406 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
407 				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
408 		if (bootverbose)
409 		    ata_printf(scp, device,
410 			       "%s setting UDMA4 on VIA chip\n",
411 			       (error) ? "failed" : "success");
412 		if (!error) {
413 		    pci_write_config(parent, 0x53 - devno, 0xf1, 1);
414 		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
415 		    return;
416 		}
417 	    }
418 	    if (udmamode >= 2) {
419 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
420 				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
421 		if (bootverbose)
422 		    ata_printf(scp, device,
423 			       "%s setting UDMA2 on VIA chip\n",
424 			       (error) ? "failed" : "success");
425 		if (!error) {
426 		    pci_write_config(parent, 0x53 - devno, 0xf4, 1);
427 		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
428 		    return;
429 		}
430 	    }
431 	}
432 	else if (ata_find_dev(parent, 0x06861106, 0) ||		/* 82C686a */
433 		 ata_find_dev(parent, 0x05961106, 0x12)) {	/* 82C596b */
434 	    if (udmamode >= 4) {
435 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
436 				    ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
437 		if (bootverbose)
438 		    ata_printf(scp, device,
439 			       "%s setting UDMA4 on VIA chip\n",
440 			       (error) ? "failed" : "success");
441 		if (!error) {
442 		    pci_write_config(parent, 0x53 - devno, 0xe8, 1);
443 		    scp->mode[ATA_DEV(device)] = ATA_UDMA4;
444 		    return;
445 		}
446 	    }
447 	    if (udmamode >= 2) {
448 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
449 				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
450 		if (bootverbose)
451 		    ata_printf(scp, device,
452 			       "%s setting UDMA2 on VIA chip\n",
453 			       (error) ? "failed" : "success");
454 		if (!error) {
455 		    pci_write_config(parent, 0x53 - devno, 0xea, 1);
456 		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
457 		    return;
458 		}
459 	    }
460 	}
461 	else if (ata_find_dev(parent, 0x05961106, 0) ||		/* 82C596a */
462 		 ata_find_dev(parent, 0x05861106, 0x03)) {	/* 82C586b */
463 via_82c586:
464 	    if (udmamode >= 2) {
465 		error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
466 				    ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
467 		if (bootverbose)
468 		    ata_printf(scp, device, "%s setting UDMA2 on %s chip\n",
469 			       (error) ? "failed" : "success",
470 			       (scp->chiptype == 0x74091022) ? "AMD" : "VIA");
471 		if (!error) {
472 	            pci_write_config(parent, 0x53 - devno, 0xc0, 1);
473 		    scp->mode[ATA_DEV(device)] = ATA_UDMA2;
474 		    return;
475 		}
476 	    }
477 	}
478 	if (wdmamode >= 2 && apiomode >= 4) {
479 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
480 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
481 	    if (bootverbose)
482 		ata_printf(scp, device, "%s setting WDMA2 on %s chip\n",
483 			   (error) ? "failed" : "success",
484 			   (scp->chiptype == 0x74091022) ? "AMD" : "VIA");
485 	    if (!error) {
486 	        pci_write_config(parent, 0x53 - devno, 0x82, 1);
487 	        pci_write_config(parent, 0x4b - devno, 0x31, 1);
488 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
489 		return;
490 	    }
491 	}
492 	/* we could set PIO mode timings, but we assume the BIOS did that */
493 	break;
494 
495     case 0x55131039:	/* SiS 5591 */
496 	if (udmamode >= 2 && pci_get_revid(parent) > 0xc1) {
497 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
498 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
499 	    if (bootverbose)
500 		ata_printf(scp, device,
501 			   "%s setting UDMA2 on SiS chip\n",
502 			   (error) ? "failed" : "success");
503 	    if (!error) {
504 		pci_write_config(parent, 0x40 + (devno << 1), 0xa301, 2);
505 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
506 		return;
507 	    }
508 	}
509 	if (wdmamode >=2 && apiomode >= 4) {
510 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
511 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
512 	    if (bootverbose)
513 		ata_printf(scp, device,
514 			   "%s setting WDMA2 on SiS chip\n",
515 			   (error) ? "failed" : "success");
516 	    if (!error) {
517 		pci_write_config(parent, 0x40 + (devno << 1), 0x0301, 2);
518 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
519 		return;
520 	    }
521 	}
522 	/* we could set PIO mode timings, but we assume the BIOS did that */
523 	break;
524 
525     case 0x06491095:	/* CMD 649 ATA100 controller */
526 	if (udmamode >= 5) {
527 	    u_int8_t umode;
528 
529 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
530 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
531 	    if (bootverbose)
532 		ata_printf(scp, device, "%s setting UDMA5 on CMD chip\n",
533 			   (error) ? "failed" : "success");
534 	    if (!error) {
535 		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
536 		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
537 		umode |= (device == ATA_MASTER ? 0x05 : 0x0a);
538 		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
539 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
540 		return;
541 	    }
542 	}
543 	/* FALLTHROUGH */
544 
545     case 0x06481095:	/* CMD 648 ATA66 controller */
546 	if (udmamode >= 4) {
547 	    u_int8_t umode;
548 
549 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
550 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
551 	    if (bootverbose)
552 		ata_printf(scp, device, "%s setting UDMA4 on CMD chip\n",
553 			   (error) ? "failed" : "success");
554 	    if (!error) {
555 		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
556 		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
557 		umode |= (device == ATA_MASTER ? 0x15 : 0x4a);
558 		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
559 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
560 		return;
561 	    }
562 	}
563 	if (udmamode >= 2) {
564 	    u_int8_t umode;
565 
566 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
567 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
568 	    if (bootverbose)
569 		ata_printf(scp, device, "%s setting UDMA2 on CMD chip\n",
570 			   (error) ? "failed" : "success");
571 	    if (!error) {
572 		umode = pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1);
573 		umode &= ~(device == ATA_MASTER ? 0x35 : 0xca);
574 		umode |= (device == ATA_MASTER ? 0x11 : 0x42);
575 		pci_write_config(parent, scp->channel ? 0x7b : 0x73, umode, 1);
576 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
577 		return;
578 	    }
579 	}
580 	/* make sure eventual UDMA mode from the BIOS is disabled */
581 	pci_write_config(parent, scp->channel ? 0x7b : 0x73,
582 			 pci_read_config(parent, scp->channel ? 0x7b : 0x73, 1)&
583 			 ~(device == ATA_MASTER ? 0x35 : 0xca), 1);
584 	/* FALLTHROUGH */
585 
586     case 0x06461095:	/* CMD 646 ATA controller */
587 	if (wdmamode >= 2 && apiomode >= 4) {
588 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
589 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
590 	    if (bootverbose)
591 		ata_printf(scp, device, "%s setting WDMA2 on CMD chip\n",
592 			   error ? "failed" : "success");
593 	    if (!error) {
594 		int32_t offset = (devno < 3) ? (devno << 1) : 7;
595 
596 		pci_write_config(parent, 0x54 + offset, 0x3f, 1);
597 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
598 		return;
599 	    }
600 	}
601 	/* we could set PIO mode timings, but we assume the BIOS did that */
602 	break;
603 
604     case 0xc6931080:	/* Cypress 82c693 ATA controller */
605 	if (wdmamode >= 2 && apiomode >= 4) {
606 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
607 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
608 	    if (bootverbose)
609 		ata_printf(scp, device,
610 			   "%s setting WDMA2 on Cypress chip\n",
611 			   error ? "failed" : "success");
612 	    if (!error) {
613 		pci_write_config(scp->dev, scp->channel ? 0x4e:0x4c, 0x2020, 2);
614 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
615 		return;
616 	    }
617 	}
618 	/* we could set PIO mode timings, but we assume the BIOS did that */
619 	break;
620 
621     case 0x01021078:	/* Cyrix 5530 ATA33 controller */
622 	scp->alignment = 0xf;	/* DMA engine requires 16 byte alignment */
623 	if (udmamode >= 2) {
624 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
625 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
626 	    if (bootverbose)
627 		ata_printf(scp, device, "%s setting UDMA2 on Cyrix chip\n",
628 			   (error) ? "failed" : "success");
629 	    if (!error) {
630 		cyrix_timing(scp, devno, ATA_UDMA2);
631 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
632 		return;
633 	    }
634 	}
635 	if (wdmamode >= 2 && apiomode >= 4) {
636 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
637 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
638 	    if (bootverbose)
639 		ata_printf(scp, device, "%s setting WDMA2 on Cyrix chip\n",
640 			   (error) ? "failed" : "success");
641 	    if (!error) {
642 		cyrix_timing(scp, devno, ATA_WDMA2);
643 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
644 		return;
645 	    }
646 	}
647 	error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
648 			    ata_pio2mode(apiomode), ATA_C_F_SETXFER,
649 			    ATA_WAIT_READY);
650 	if (bootverbose)
651 	    ata_printf(scp, device, "%s setting %s on Cyrix chip\n",
652 		       (error) ? "failed" : "success",
653 		       ata_mode2str(ata_pio2mode(apiomode)));
654 	cyrix_timing(scp, devno, ata_pio2mode(apiomode));
655 	scp->mode[ATA_DEV(device)] = ata_pio2mode(apiomode);
656 	return;
657 
658     case 0x02111166:	/* ServerWorks ROSB4 ATA33 controller */
659 	if (udmamode >= 2) {
660 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
661 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
662 	    if (bootverbose)
663 		ata_printf(scp, device,
664 			   "%s setting UDMA2 on ServerWorks chip\n",
665 			   (error) ? "failed" : "success");
666 	    if (!error) {
667 		u_int16_t reg56;
668 
669 		pci_write_config(parent, 0x54,
670 				 pci_read_config(parent, 0x54, 1) |
671 				 (0x01 << devno), 1);
672 		reg56 = pci_read_config(parent, 0x56, 2);
673 		reg56 &= ~(0xf << (devno * 4));
674 		reg56 |= (0x2 << (devno * 4));
675 		pci_write_config(parent, 0x56, reg56, 2);
676 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
677 		return;
678 	    }
679 	}
680 	if (wdmamode >= 2 && apiomode >= 4) {
681 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
682 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
683 	    if (bootverbose)
684 		ata_printf(scp, device,
685 			   "%s setting WDMA2 on ServerWorks chip\n",
686 			   (error) ? "failed" : "success");
687 	    if (!error) {
688 		int offset = (scp->channel * 2) + (device == ATA_MASTER);
689 		int word44 = pci_read_config(parent, 0x44, 4);
690 
691 		pci_write_config(parent, 0x54,
692 				 pci_read_config(parent, 0x54, 1) &
693 				 ~(0x01 << devno), 1);
694 		word44 &= ~(0xff << (offset << 8));
695 		word44 |= (0x20 << (offset << 8));
696 		pci_write_config(parent, 0x44, 0x20, 4);
697 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
698 		return;
699 	    }
700 	}
701 	/* we could set PIO mode timings, but we assume the BIOS did that */
702 	break;
703 
704     case 0x4d33105a:	/* Promise Ultra/FastTrak 33 controllers */
705     case 0x4d38105a:	/* Promise Ultra/FastTrak 66 controllers */
706     case 0x4d30105a:	/* Promise Ultra/FastTrak 100 controllers */
707     case 0x0d30105a:	/* Promise OEM ATA100 controllers */
708 	/* the Promise can only do DMA on ATA disks not on ATAPI devices */
709 	if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
710 	    (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
711 	    break;
712 
713 	if (udmamode >= 5 &&
714 	    (scp->chiptype == 0x4d30105a || scp->chiptype == 0x0d30105a) &&
715 	    !(pci_read_config(parent, 0x50, 2)&(scp->channel ? 1<<11 : 1<<10))){
716 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
717 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
718 	    if (bootverbose)
719 		ata_printf(scp, device,
720 			   "%s setting UDMA5 on Promise chip\n",
721 			   (error) ? "failed" : "success");
722 	    if (!error) {
723 		promise_timing(scp, devno, ATA_UDMA5);
724 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
725 		return;
726 	    }
727 	}
728 	if (udmamode >= 4 && (scp->chiptype == 0x4d38105a ||
729 	    scp->chiptype == 0x4d30105a || scp->chiptype == 0x0d30105a) &&
730 	    !(pci_read_config(parent, 0x50, 2)&(scp->channel ? 1<<11 : 1<<10))){
731 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
732 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
733 	    if (bootverbose)
734 		ata_printf(scp, device,
735 			   "%s setting UDMA4 on Promise chip\n",
736 			   (error) ? "failed" : "success");
737 	    if (!error) {
738 		promise_timing(scp, devno, ATA_UDMA4);
739 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
740 		return;
741 	    }
742 	}
743 	if (udmamode >= 2) {
744 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
745 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
746 	    if (bootverbose)
747 		ata_printf(scp, device,
748 			   "%s setting UDMA2 on Promise chip\n",
749 			   (error) ? "failed" : "success");
750 	    if (!error) {
751 		promise_timing(scp, devno, ATA_UDMA2);
752 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
753 		return;
754 	    }
755 	}
756 	if (wdmamode >= 2 && apiomode >= 4) {
757 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
758 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
759 	    if (bootverbose)
760 		ata_printf(scp, device,
761 			   "%s setting WDMA2 on Promise chip\n",
762 			   (error) ? "failed" : "success");
763 	    if (!error) {
764 		promise_timing(scp, devno, ATA_WDMA2);
765 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
766 		return;
767 	    }
768 	}
769 	error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
770 			    ata_pio2mode(apiomode),
771 			    ATA_C_F_SETXFER, ATA_WAIT_READY);
772 	if (bootverbose)
773 	    ata_printf(scp, device,
774 		       "%s setting PIO%d on Promise chip\n",
775 		       (error) ? "failed" : "success",
776 		       (apiomode >= 0) ? apiomode : 0);
777 	promise_timing(scp, devno, ata_pio2mode(apiomode));
778 	scp->mode[ATA_DEV(device)] = ata_pio2mode(apiomode);
779 	return;
780 
781     case 0x00041103:	/* HighPoint HPT366/368/370 controllers */
782 	/* no ATAPI devices for now */
783 	if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
784 	    (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
785 	    break;
786 
787 	if (udmamode >=5 && pci_get_revid(parent) >= 0x03 &&
788 	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
789 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
790 				ATA_UDMA5, ATA_C_F_SETXFER, ATA_WAIT_READY);
791 	    if (bootverbose)
792 		ata_printf(scp, device,
793 			   "%s setting UDMA5 on HighPoint chip\n",
794 			   (error) ? "failed" : "success");
795 	    if (!error) {
796 		hpt_timing(scp, devno, ATA_UDMA5);
797 		scp->mode[ATA_DEV(device)] = ATA_UDMA5;
798 		return;
799 	    }
800 	}
801 	if (udmamode >=4 &&
802 	    !(pci_read_config(parent, 0x5a, 1) & (scp->channel ? 0x01:0x02))) {
803 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
804 				ATA_UDMA4, ATA_C_F_SETXFER, ATA_WAIT_READY);
805 	    if (bootverbose)
806 		ata_printf(scp, device,
807 			   "%s setting UDMA4 on HighPoint chip\n",
808 			   (error) ? "failed" : "success");
809 	    if (!error) {
810 		hpt_timing(scp, devno, ATA_UDMA4);
811 		scp->mode[ATA_DEV(device)] = ATA_UDMA4;
812 		return;
813 	    }
814 	}
815 	if (udmamode >= 2) {
816 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
817 				ATA_UDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
818 	    if (bootverbose)
819 		ata_printf(scp, device,
820 			   "%s setting UDMA2 on HighPoint chip\n",
821 			   (error) ? "failed" : "success");
822 	    if (!error) {
823 		hpt_timing(scp, devno, ATA_UDMA2);
824 		scp->mode[ATA_DEV(device)] = ATA_UDMA2;
825 		return;
826 	    }
827 	}
828 	if (wdmamode >= 2 && apiomode >= 4) {
829 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
830 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
831 	    if (bootverbose)
832 		ata_printf(scp, device,
833 			   "%s setting WDMA2 on HighPoint chip\n",
834 			   (error) ? "failed" : "success");
835 	    if (!error) {
836 		hpt_timing(scp, devno, ATA_WDMA2);
837 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
838 		return;
839 	    }
840 	}
841 	error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
842 			    ata_pio2mode(apiomode),
843 			    ATA_C_F_SETXFER, ATA_WAIT_READY);
844 	if (bootverbose)
845 	    ata_printf(scp, device, "%s setting PIO%d on HighPoint chip\n",
846 		       (error) ? "failed" : "success",
847 		       (apiomode >= 0) ? apiomode : 0);
848 	hpt_timing(scp, devno, ata_pio2mode(apiomode));
849 	scp->mode[ATA_DEV(device)] = ata_pio2mode(apiomode);
850 	return;
851 
852     default:		/* unknown controller chip */
853 	/* better not try generic DMA on ATAPI devices it almost never works */
854 	if ((device == ATA_MASTER && scp->devices & ATA_ATAPI_MASTER) ||
855 	    (device == ATA_SLAVE && scp->devices & ATA_ATAPI_SLAVE))
856 	    break;
857 
858 	/* if controller says its setup for DMA take the easy way out */
859 	/* the downside is we dont know what DMA mode we are in */
860 	if ((udmamode >= 0 || wdmamode > 1) &&
861 	    (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) &
862 	     ((device==ATA_MASTER) ?
863 	      ATA_BMSTAT_DMA_MASTER : ATA_BMSTAT_DMA_SLAVE))) {
864 	    scp->mode[ATA_DEV(device)] = ATA_DMA;
865 	    return;
866 	}
867 
868 	/* well, we have no support for this, but try anyways */
869 	if ((wdmamode >= 2 && apiomode >= 4) && scp->r_bmio) {
870 	    error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
871 				ATA_WDMA2, ATA_C_F_SETXFER, ATA_WAIT_READY);
872 	    if (bootverbose)
873 		ata_printf(scp, device,
874 			   "%s setting WDMA2 on generic chip\n",
875 			   (error) ? "failed" : "success");
876 	    if (!error) {
877 		scp->mode[ATA_DEV(device)] = ATA_WDMA2;
878 		return;
879 	    }
880 	}
881     }
882     error = ata_command(scp, device, ATA_C_SETFEATURES, 0, 0, 0,
883 			ata_pio2mode(apiomode), ATA_C_F_SETXFER,ATA_WAIT_READY);
884     if (bootverbose)
885 	ata_printf(scp, device, "%s setting PIO%d on generic chip\n",
886 		   (error) ? "failed" : "success", apiomode < 0 ? 0 : apiomode);
887     if (!error)
888         scp->mode[ATA_DEV(device)] = ata_pio2mode(apiomode);
889     else {
890 	if (bootverbose)
891 	    ata_printf(scp, device, "using PIO mode set by BIOS\n");
892         scp->mode[ATA_DEV(device)] = ATA_PIO;
893     }
894 }
895 
896 int
897 ata_dmasetup(struct ata_softc *scp, int device, struct ata_dmaentry *dmatab,
898 	     caddr_t data, int32_t count)
899 {
900     u_int32_t dma_count, dma_base;
901     int i = 0;
902 
903     if (((uintptr_t)data & scp->alignment) || (count & scp->alignment)) {
904 	ata_printf(scp, device, "non aligned DMA transfer attempted\n");
905 	return -1;
906     }
907 
908     if (!count) {
909 	ata_printf(scp, device, "zero length DMA transfer attempted\n");
910 	return -1;
911     }
912 
913     dma_base = vtophys(data);
914     dma_count = min(count, (PAGE_SIZE - ((uintptr_t)data & PAGE_MASK)));
915     data += dma_count;
916     count -= dma_count;
917 
918     while (count) {
919 	dmatab[i].base = dma_base;
920 	dmatab[i].count = (dma_count & 0xffff);
921 	i++;
922 	if (i >= ATA_DMA_ENTRIES) {
923 	    ata_printf(scp, device, "too many segments in DMA table\n");
924 	    return -1;
925 	}
926 	dma_base = vtophys(data);
927 	dma_count = min(count, PAGE_SIZE);
928 	data += min(count, PAGE_SIZE);
929 	count -= min(count, PAGE_SIZE);
930     }
931     dmatab[i].base = dma_base;
932     dmatab[i].count = (dma_count & 0xffff) | ATA_DMA_EOT;
933     return 0;
934 }
935 
936 void
937 ata_dmastart(struct ata_softc *scp, int device,
938 	     struct ata_dmaentry *dmatab, int dir)
939 {
940     scp->flags |= ATA_DMA_ACTIVE;
941     ATA_OUTL(scp->r_bmio, ATA_BMDTP_PORT, vtophys(dmatab));
942     ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT, dir ? ATA_BMCMD_WRITE_READ : 0);
943     ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
944          (ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) |
945 	  (ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR)));
946     ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT,
947 	 ATA_INB(scp->r_bmio, ATA_BMCMD_PORT) | ATA_BMCMD_START_STOP);
948 }
949 
950 int
951 ata_dmadone(struct ata_softc *scp)
952 {
953     int error;
954 
955     ATA_OUTB(scp->r_bmio, ATA_BMCMD_PORT,
956 		ATA_INB(scp->r_bmio, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
957     scp->flags &= ~ATA_DMA_ACTIVE;
958     error = ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT);
959     ATA_OUTB(scp->r_bmio, ATA_BMSTAT_PORT,
960 	     error | ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
961     return error & ATA_BMSTAT_MASK;
962 }
963 
964 int
965 ata_dmastatus(struct ata_softc *scp)
966 {
967     return ATA_INB(scp->r_bmio, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
968 }
969 
970 static void
971 cyrix_timing(struct ata_softc *scp, int devno, int mode)
972 {
973     u_int32_t reg20 = 0x0000e132;
974     u_int32_t reg24 = 0x00017771;
975 
976     switch (mode) {
977     case ATA_PIO0:	reg20 = 0x0000e132; break;
978     case ATA_PIO1:	reg20 = 0x00018121; break;
979     case ATA_PIO2:	reg20 = 0x00024020; break;
980     case ATA_PIO3:	reg20 = 0x00032010; break;
981     case ATA_PIO4:	reg20 = 0x00040010; break;
982     case ATA_WDMA2:	reg24 = 0x00002020; break;
983     case ATA_UDMA2:	reg24 = 0x00911030; break;
984     }
985     ATA_OUTL(scp->r_bmio, (devno << 3) + 0x20, reg20);
986     ATA_OUTL(scp->r_bmio, (devno << 3) + 0x24, reg24);
987 }
988 
989 static void
990 promise_timing(struct ata_softc *scp, int devno, int mode)
991 {
992     u_int32_t timing = 0;
993     struct promise_timing {
994 	u_int8_t  pa:4;
995 	u_int8_t  prefetch:1;
996 	u_int8_t  iordy:1;
997 	u_int8_t  errdy:1;
998 	u_int8_t  syncin:1;
999 	u_int8_t  pb:5;
1000 	u_int8_t  mb:3;
1001 	u_int8_t  mc:4;
1002 	u_int8_t  dmaw:1;
1003 	u_int8_t  dmar:1;
1004 	u_int8_t  iordyp:1;
1005 	u_int8_t  dmarqp:1;
1006 	u_int8_t  reserved:8;
1007     } *t = (struct promise_timing*)&timing;
1008 
1009     t->iordy = 1; t->iordyp = 1;
1010     if (mode >= ATA_DMA) {
1011 	t->prefetch = 1; t->errdy = 1; t->syncin = 1;
1012     }
1013 
1014     switch (scp->chiptype) {
1015     case 0x4d33105a:  /* Promise Ultra/Fasttrak 33 */
1016 	switch (mode) {
1017 	default:
1018 	case ATA_PIO0:  t->pa =  9; t->pb = 19; t->mb = 7; t->mc = 15; break;
1019 	case ATA_PIO1:  t->pa =  5; t->pb = 12; t->mb = 7; t->mc = 15; break;
1020 	case ATA_PIO2:  t->pa =  3; t->pb =  8; t->mb = 7; t->mc = 15; break;
1021 	case ATA_PIO3:  t->pa =  2; t->pb =  6; t->mb = 7; t->mc = 15; break;
1022 	case ATA_PIO4:  t->pa =  1; t->pb =  4; t->mb = 7; t->mc = 15; break;
1023 	case ATA_WDMA2: t->pa =  3; t->pb =  7; t->mb = 3; t->mc =  3; break;
1024 	case ATA_UDMA2: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1025 	}
1026 	break;
1027 
1028     case 0x4d38105a:  /* Promise Ultra/Fasttrak 66 */
1029     case 0x4d30105a:  /* Promise Ultra/Fasttrak 100 */
1030     case 0x0d30105a:  /* Promise OEM ATA 100 */
1031 	switch (mode) {
1032 	default:
1033 	case ATA_PIO0:  t->pa = 15; t->pb = 31; t->mb = 7; t->mc = 15; break;
1034 	case ATA_PIO1:  t->pa = 10; t->pb = 24; t->mb = 7; t->mc = 15; break;
1035 	case ATA_PIO2:  t->pa =  6; t->pb = 16; t->mb = 7; t->mc = 15; break;
1036 	case ATA_PIO3:  t->pa =  4; t->pb = 12; t->mb = 7; t->mc = 15; break;
1037 	case ATA_PIO4:  t->pa =  2; t->pb =  8; t->mb = 7; t->mc = 15; break;
1038 	case ATA_WDMA2: t->pa =  6; t->pb = 14; t->mb = 6; t->mc =  6; break;
1039 	case ATA_UDMA2: t->pa =  6; t->pb = 14; t->mb = 2; t->mc =  2; break;
1040 	case ATA_UDMA4: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1041 	case ATA_UDMA5: t->pa =  3; t->pb =  7; t->mb = 1; t->mc =  1; break;
1042 	}
1043 	break;
1044     }
1045     pci_write_config(device_get_parent(scp->dev), 0x60 + (devno<<2), timing, 4);
1046 }
1047 
1048 static void
1049 hpt_timing(struct ata_softc *scp, int devno, int mode)
1050 {
1051     device_t parent = device_get_parent(scp->dev);
1052     u_int32_t timing;
1053 
1054     if (pci_get_revid(parent) >= 0x03) {	/* HPT370 */
1055 	switch (mode) {
1056 	case ATA_PIO0:	timing = 0x06914e57; break;
1057 	case ATA_PIO1:	timing = 0x06914e43; break;
1058 	case ATA_PIO2:	timing = 0x06514e33; break;
1059 	case ATA_PIO3:	timing = 0x06514e22; break;
1060 	case ATA_PIO4:	timing = 0x06514e21; break;
1061 	case ATA_WDMA2:	timing = 0x26514e21; break;
1062 	case ATA_UDMA2:	timing = 0x16494e31; break;
1063 	case ATA_UDMA4:	timing = 0x16454e31; break;
1064 	case ATA_UDMA5:	timing = 0x16454e31; break;
1065 	default:	timing = 0x06514e57;
1066 	}
1067 	pci_write_config(parent, 0x40 + (devno << 2) , timing, 4);
1068 	pci_write_config(parent, 0x5b, 0x22, 1);
1069     }
1070     else {					/* HPT36[68] */
1071 	switch (pci_read_config(parent, 0x41 + (devno << 2), 1)) {
1072 	case 0x85:	/* 25Mhz */
1073 	    switch (mode) {
1074 	    case ATA_PIO0:	timing = 0xc0d08585; break;
1075 	    case ATA_PIO1:	timing = 0xc0d08572; break;
1076 	    case ATA_PIO2:	timing = 0xc0ca8542; break;
1077 	    case ATA_PIO3:	timing = 0xc0ca8532; break;
1078 	    case ATA_PIO4:	timing = 0xc0ca8521; break;
1079 	    case ATA_WDMA2:	timing = 0xa0ca8521; break;
1080 	    case ATA_UDMA2:	timing = 0x90cf8521; break;
1081 	    case ATA_UDMA4:	timing = 0x90c98521; break;
1082 	    default:		timing = 0x01208585;
1083 	    }
1084 	    break;
1085 	default:
1086 	case 0xa7:	/* 33MHz */
1087 	    switch (mode) {
1088 	    case ATA_PIO0:	timing = 0xc0d0a7aa; break;
1089 	    case ATA_PIO1:	timing = 0xc0d0a7a3; break;
1090 	    case ATA_PIO2:	timing = 0xc0d0a753; break;
1091 	    case ATA_PIO3:	timing = 0xc0c8a742; break;
1092 	    case ATA_PIO4:	timing = 0xc0c8a731; break;
1093 	    case ATA_WDMA2:	timing = 0xa0c8a731; break;
1094 	    case ATA_UDMA2:	timing = 0x90caa731; break;
1095 	    case ATA_UDMA4:	timing = 0x90c9a731; break;
1096 	    default:		timing = 0x0120a7a7;
1097 	    }
1098 	    break;
1099 	case 0xd9:	/* 40Mhz */
1100 	    switch (mode) {
1101 	    case ATA_PIO0:	timing = 0xc018d9d9; break;
1102 	    case ATA_PIO1:	timing = 0xc010d9c7; break;
1103 	    case ATA_PIO2:	timing = 0xc010d997; break;
1104 	    case ATA_PIO3:	timing = 0xc010d974; break;
1105 	    case ATA_PIO4:	timing = 0xc008d963; break;
1106 	    case ATA_WDMA2:	timing = 0xa008d943; break;
1107 	    case ATA_UDMA2:	timing = 0x900bd943; break;
1108 	    case ATA_UDMA4:	timing = 0x900fd943; break;
1109 	    default:		timing = 0x0120d9d9;
1110 	    }
1111 	}
1112 	pci_write_config(parent, 0x40 + (devno << 2), (timing & ~0x80000000),4);
1113     }
1114 }
1115