ata-all.c revision 50842 
1/*-
2 * Copyright (c) 1998,1999 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: head/sys/dev/ata/ata-all.c 50842 1999-09-03 10:57:17Z phk $
29 */
30
31#include "ata.h"
32#if NATA > 0
33#include "isa.h"
34#include "pci.h"
35#include "atadisk.h"
36#include "opt_global.h"
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/interrupt.h>
41#include <sys/conf.h>
42#include <sys/module.h>
43#include <sys/bus.h>
44#include <sys/buf.h>
45#include <sys/malloc.h>
46#include <sys/devicestat.h>
47#include <vm/vm.h>
48#include <vm/pmap.h>
49#include <machine/resource.h>
50#include <machine/bus.h>
51#include <sys/rman.h>
52#include <machine/clock.h>
53#ifdef __i386__
54#include <machine/smp.h>
55#include <i386/isa/intr_machdep.h>
56#endif
57#if NPCI > 0
58#include <pci/pcivar.h>
59#include <pci/pcireg.h>
60#endif
61#include <isa/isavar.h>
62#include <isa/isareg.h>
63#include <dev/ata/ata-all.h>
64#include <dev/ata/atapi-all.h>
65
66/* misc defines */
67#define UNIT(dev) (dev>>3 & 0x1f)   		/* assume 8 minor # per unit */
68#define MIN(a,b) ((a)>(b)?(b):(a))
69#if SMP == 0
70#define isa_apic_irq(x)	x
71#endif
72
73/* prototypes */
74#if NPCI > 0
75static void promise_intr(void *);
76#endif
77static int32_t ata_probe(int32_t, int32_t, int32_t, device_t, int32_t *);
78static void ataintr(void *);
79
80static int32_t atanlun = 0;
81struct ata_softc *atadevices[MAXATA];
82static devclass_t ata_devclass;
83
84#if NISA > 0
85static struct isa_pnp_id ata_ids[] = {
86    {0x0006d041,	"Generic ESDI/IDE/ATA controller"}, /* PNP0600 */
87    {0x0106d041,	"Plus Hardcard II"},		/* PNP0601 */
88    {0x0206d041,	"Plus Hardcard IIXL/EZ"},	/* PNP0602 */
89    {0x0306d041,	"Generic ATA"},			/* PNP0603 */
90    {0}
91};
92
93static int
94ata_isaprobe(device_t dev)
95{
96    struct resource *port;
97    int rid;
98    int32_t ctlr, res;
99    int32_t lun;
100
101    /* Check isapnp ids */
102    if (ISA_PNP_PROBE(device_get_parent(dev), dev, ata_ids) == ENXIO)
103	return (ENXIO);
104
105    /* Allocate the port range */
106    rid = 0;
107    port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE);
108    if (!port)
109	return (ENOMEM);
110
111    /* check if allready in use by a PCI device */
112    for (ctlr = 0; ctlr < atanlun; ctlr++) {
113	if (atadevices[ctlr]->ioaddr == rman_get_start(port)) {
114	    printf("ata-isa%d: already registered as ata%d\n",
115		   device_get_unit(dev), ctlr);
116	    bus_release_resource(dev, SYS_RES_IOPORT, 0, port);
117	    return ENXIO;
118	}
119    }
120
121    lun = 0;
122    res = ata_probe(rman_get_start(port), rman_get_start(port) + ATA_ALTPORT,
123		    0, dev, &lun);
124
125    bus_release_resource(dev, SYS_RES_IOPORT, 0, port);
126
127    if (res) {
128	isa_set_portsize(dev, res);
129	*(int *)device_get_softc(dev) = lun;
130	return 0;
131    }
132
133    return ENXIO;
134}
135
136static int
137ata_isaattach(device_t dev)
138{
139    struct resource *port;
140    struct resource *irq;
141    void *ih;
142    int rid;
143
144    /* Allocate the port range and interrupt */
145    rid = 0;
146    port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE);
147    if (!port)
148	return (ENOMEM);
149
150    rid = 0;
151    irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_ACTIVE);
152    if (!irq) {
153	bus_release_resource(dev, SYS_RES_IOPORT, 0, port);
154	return (ENOMEM);
155    }
156    return bus_setup_intr(dev, irq, INTR_TYPE_BIO, ataintr,
157			  atadevices[*(int *)device_get_softc(dev)], &ih);
158}
159
160static device_method_t ata_isa_methods[] = {
161    /* Device interface */
162    DEVMETHOD(device_probe,	ata_isaprobe),
163    DEVMETHOD(device_attach,	ata_isaattach),
164    { 0, 0 }
165};
166
167static driver_t ata_isa_driver = {
168    "ata",
169    ata_isa_methods,
170    sizeof(int),
171};
172
173DRIVER_MODULE(ata, isa, ata_isa_driver, ata_devclass, 0, 0);
174
175#endif
176
177#if NPCI > 0
178
179static const char *
180ata_pcimatch(device_t dev)
181{
182    u_int32_t data;
183
184    data = pci_read_config(dev, PCI_CLASS_REG, 4);
185    if (pci_get_class(dev) == PCIC_STORAGE &&
186	(pci_get_subclass(dev) == PCIS_STORAGE_IDE ||
187	 pci_get_subclass(dev) == PCIS_STORAGE_RAID ||
188	 pci_get_subclass(dev) == PCIS_STORAGE_OTHER)) {
189	switch (pci_get_devid(dev)) {
190	case 0x12308086:
191	    return "Intel PIIX IDE controller";
192	case 0x70108086:
193	    return "Intel PIIX3 IDE controller";
194	case 0x71118086:
195	    return "Intel PIIX4 IDE controller";
196	case 0x4d33105a:
197	    return "Promise Ultra/33 IDE controller";
198	case 0x4d38105a:
199	    return "Promise Ultra/66 IDE controller";
200	case 0x522910b9:
201	    return "AcerLabs Aladdin IDE controller";
202#if 0
203	case 0x05711106:
204	    return "VIA Apollo IDE controller";
205	case 0x06401095:
206	    return "CMD 640 IDE controller";
207	case 0x06461095:
208	    return "CMD 646 IDE controller";
209	case 0xc6931080:
210	    return "Cypress 82C693 IDE controller";
211	case 0x01021078:
212	    return "Cyrix 5530 IDE controller";
213#endif
214	default:
215	    return "Unknown PCI IDE controller (using generic mode)";
216	}
217    }
218    return NULL;
219}
220
221static int
222ata_pciprobe(device_t dev)
223{
224    const char *desc = ata_pcimatch(dev);
225    if (desc) {
226	device_set_desc(dev, desc);
227	return 0;
228    }
229    else
230	return ENXIO;
231}
232
233static int
234ata_pciattach(device_t dev)
235{
236    int unit = device_get_unit(dev);
237    struct ata_softc *scp;
238    u_int32_t type;
239    u_int8_t class, subclass;
240    u_int32_t cmd;
241    int32_t iobase_1, iobase_2, altiobase_1, altiobase_2;
242    int32_t bmaddr_1 = 0, bmaddr_2 = 0, irq1, irq2;
243    int32_t lun;
244
245    /* set up vendor-specific stuff */
246    type = pci_get_devid(dev);
247    class = pci_get_class(dev);
248    subclass = pci_get_subclass(dev);
249    cmd = pci_read_config(dev, PCIR_COMMAND, 4);
250
251#ifdef ATA_DEBUG
252    printf("ata-pci%d: type=%08x class=%02x subclass=%02x cmd=%08x\n",
253	   unit, type, class, subclass, cmd);
254#endif
255
256    /* if this is a Promise controller handle it specially */
257    if (type == 0x4d33105a || type == 0x4d38105a) {
258	iobase_1 = pci_read_config(dev, 0x10, 4) & 0xfffc;
259	altiobase_1 = pci_read_config(dev, 0x14, 4) & 0xfffc;
260	iobase_2 = pci_read_config(dev, 0x18, 4) & 0xfffc;
261	altiobase_2 = pci_read_config(dev, 0x1c, 4) & 0xfffc;
262	irq1 = irq2 = pci_read_config(dev, PCI_INTERRUPT_REG, 4) & 0xff;
263    	bmaddr_1 = pci_read_config(dev, 0x20, 4) & 0xfffc;
264	bmaddr_2 = bmaddr_1 + ATA_BM_OFFSET1;
265	outb(bmaddr_1 + 0x1f, inb(bmaddr_1 + 0x1f) | 0x01);
266	printf("ata-pci%d: Busmastering DMA supported\n", unit);
267    }
268    /* everybody else seems to do it this way */
269    else {
270	if ((unit == 0) &&
271	    (pci_get_progif(dev) & PCIP_STORAGE_IDE_MODEPRIM) == 0) {
272		iobase_1 = IO_WD1;
273		altiobase_1 = iobase_1 + ATA_ALTPORT;
274		irq1 = 14;
275	}
276	else {
277		iobase_1 = pci_read_config(dev, 0x10, 4) & 0xfffc;
278		altiobase_1 = pci_read_config(dev, 0x14, 4) & 0xfffc;
279		irq1 = pci_read_config(dev, PCI_INTERRUPT_REG, 4) & 0xff;
280	}
281	if ((unit == 0) &&
282	    (pci_get_progif(dev) & PCIP_STORAGE_IDE_MODESEC) == 0) {
283		iobase_2 = IO_WD2;
284		altiobase_2 = iobase_2 + ATA_ALTPORT;
285		irq2 = 15;
286	}
287	else {
288		iobase_2 = pci_read_config(dev, 0x18, 4) & 0xfffc;
289		altiobase_2 = pci_read_config(dev, 0x1c, 4) & 0xfffc;
290		irq2 = pci_read_config(dev, PCI_INTERRUPT_REG, 4) & 0xff;
291	}
292
293        /* is this controller busmaster capable ? */
294        if (pci_get_progif(dev) & PCIP_STORAGE_IDE_MASTERDEV) {
295	    /* is busmastering support turned on ? */
296	    if ((pci_read_config(dev, PCI_COMMAND_STATUS_REG, 4) & 5) == 5) {
297	        /* is there a valid port range to connect to ? */
298    	        if ((bmaddr_1 = pci_read_config(dev, 0x20, 4) & 0xfffc)) {
299		    bmaddr_2 = bmaddr_1 + ATA_BM_OFFSET1;
300		    printf("ata-pci%d: Busmastering DMA supported\n", unit);
301    	        }
302    	        else
303		    printf("ata-pci%d: Busmastering DMA not configured\n",unit);
304	    }
305	    else
306	        printf("ata-pci%d: Busmastering DMA not enabled\n", unit);
307        }
308        else
309	    printf("ata-pci%d: Busmastering DMA not supported\n", unit);
310    }
311
312    /* now probe the addresse found for "real" ATA/ATAPI hardware */
313    lun = 0;
314    if (ata_probe(iobase_1, altiobase_1, bmaddr_1, dev, &lun)) {
315	scp = atadevices[lun];
316	if (iobase_1 == IO_WD1)
317#ifdef __i386__
318	    inthand_add(device_get_nameunit(dev), irq1, ataintr, scp,
319		        &bio_imask, INTR_EXCL);
320#endif
321#ifdef __alpha__
322	    alpha_platform_setup_ide_intr(0, ataintr, scp);
323#endif
324	else {
325	    struct resource *irq;
326	    int rid = 0;
327	    void *ih;
328
329	    irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
330				     RF_SHAREABLE | RF_ACTIVE);
331	    if (!irq)
332		printf("ata_pciattach: Unable to alloc interrupt\n");
333
334    	    if (type == 0x4d33105a || type == 0x4d38105a)
335		bus_setup_intr(dev, irq, INTR_TYPE_BIO, promise_intr, scp, &ih);
336	    else
337		bus_setup_intr(dev, irq, INTR_TYPE_BIO, ataintr, scp, &ih);
338	}
339	printf("ata%d at 0x%04x irq %d on ata-pci%d\n",
340	       lun, iobase_1, isa_apic_irq(irq1), unit);
341    }
342    lun = 1;
343    if (ata_probe(iobase_2, altiobase_2, bmaddr_2, dev, &lun)) {
344	scp = atadevices[lun];
345	if (iobase_2 == IO_WD2)
346#ifdef __i386__
347	    inthand_add(device_get_nameunit(dev), irq2, ataintr, scp,
348		        &bio_imask, INTR_EXCL);
349#endif
350#ifdef __alpha__
351	    alpha_platform_setup_ide_intr(1, ataintr, scp);
352#endif
353	else {
354	    struct resource *irq;
355	    int rid = 0;
356	    void *ih;
357
358    	    if (type != 0x4d33105a && type != 0x4d38105a) {
359	        irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
360					 RF_SHAREABLE | RF_ACTIVE);
361	        if (!irq)
362		    printf("ata_pciattach: Unable to alloc interrupt\n");
363
364		bus_setup_intr(dev, irq, INTR_TYPE_BIO, ataintr, scp, &ih);
365	    }
366	}
367	printf("ata%d at 0x%04x irq %d on ata-pci%d\n",
368	       lun, iobase_2, isa_apic_irq(irq2), unit);
369    }
370    return 0;
371}
372
373static device_method_t ata_pci_methods[] = {
374    /* Device interface */
375    DEVMETHOD(device_probe,	ata_pciprobe),
376    DEVMETHOD(device_attach,	ata_pciattach),
377    { 0, 0 }
378};
379
380static driver_t ata_pci_driver = {
381    "ata-pci",
382    ata_pci_methods,
383    sizeof(int),
384};
385
386DRIVER_MODULE(ata, pci, ata_pci_driver, ata_devclass, 0, 0);
387
388static void
389promise_intr(void *data)
390{
391    struct ata_softc *scp = (struct ata_softc *)data;
392    int32_t channel = inl((pci_read_config(scp->dev, 0x20, 4) & 0xfffc) + 0x1c);
393
394    if (channel & 0x00000400)
395	ataintr(data);
396
397    if (channel & 0x00004000)
398	ataintr(atadevices[scp->lun + 1]);
399}
400#endif
401
402static int32_t
403ata_probe(int32_t ioaddr, int32_t altioaddr, int32_t bmaddr,
404	  device_t dev, int32_t *unit)
405{
406    struct ata_softc *scp = atadevices[atanlun];
407    int32_t mask = 0;
408    int32_t timeout;
409    int32_t lun = atanlun;
410    u_int8_t status0, status1;
411
412#ifdef ATA_STATIC_ID
413    atanlun++;
414#endif
415    if (lun > MAXATA) {
416	printf("ata: unit out of range(%d)\n", lun);
417	return 0;
418    }
419    if (scp) {
420	printf("ata%d: unit already attached\n", lun);
421	return 0;
422    }
423    scp = malloc(sizeof(struct ata_softc), M_DEVBUF, M_NOWAIT);
424    if (scp == NULL) {
425	printf("ata%d: failed to allocate driver storage\n", lun);
426	return 0;
427    }
428    bzero(scp, sizeof(struct ata_softc));
429
430    scp->unit = *unit;
431    scp->lun = lun;
432    scp->ioaddr = ioaddr;
433    scp->altioaddr = altioaddr;
434    scp->active = ATA_IDLE;
435
436#ifdef ATA_DEBUG
437    printf("ata%d: iobase=0x%04x altiobase=0x%04x\n",
438	   scp->lun, scp->ioaddr, scp->altioaddr);
439#endif
440
441    /* do we have any signs of ATA/ATAPI HW being present ? */
442    outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
443    DELAY(1);
444    status0 = inb(scp->ioaddr + ATA_STATUS);
445    outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | ATA_SLAVE);
446    DELAY(1);
447    status1 = inb(scp->ioaddr + ATA_STATUS);
448    if ((status0 & 0xf8) != 0xf8)
449        mask |= 0x01;
450    if ((status1 & 0xf8) != 0xf8)
451        mask |= 0x02;
452#ifdef ATA_DEBUG
453    printf("ata%d: mask=%02x status0=%02x status1=%02x\n",
454	   scp->lun, mask, status0, status1);
455#endif
456    if (!mask) {
457	free(scp, M_DEVBUF);
458        return 0;
459    }
460    /* assert reset for devices and wait for completition */
461    outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
462    DELAY(1);
463    outb(scp->altioaddr, ATA_A_IDS | ATA_A_RESET);
464    DELAY(1000);
465    outb(scp->altioaddr, ATA_A_IDS);
466    DELAY(1000);
467    inb(scp->ioaddr + ATA_ERROR);
468    DELAY(1);
469    outb(scp->altioaddr, ATA_A_4BIT);
470    DELAY(1);
471
472    /* wait for BUSY to go inactive */
473    for (timeout = 0; timeout < 30000*10; timeout++) {
474        outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
475        DELAY(1);
476        status0 = inb(scp->ioaddr + ATA_STATUS);
477        outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | ATA_SLAVE);
478        DELAY(1);
479        status1 = inb(scp->ioaddr + ATA_STATUS);
480        if (mask == 0x01)      /* wait for master only */
481            if (!(status0 & ATA_S_BSY))
482            	break;
483        if (mask == 0x02)      /* wait for slave only */
484            if (!(status1 & ATA_S_BSY))
485            	break;
486        if (mask == 0x03)      /* wait for both master & slave */
487            if (!(status0 & ATA_S_BSY) && !(status1 & ATA_S_BSY))
488            	break;
489        DELAY(100);
490    }
491    if (status0 & ATA_S_BSY)
492        mask &= ~0x01;
493    if (status1 & ATA_S_BSY)
494        mask &= ~0x02;
495#ifdef ATA_DEBUG
496    printf("ata%d: mask=%02x status0=%02x status1=%02x\n",
497	   scp->lun, mask, status0, status1);
498#endif
499    if (!mask) {
500	free(scp, M_DEVBUF);
501        return 0;
502    }
503    /*
504     * OK, we have at least one device on the chain,
505     * check for ATAPI signatures, if none check if its
506     * a good old ATA device.
507     */
508
509    outb(scp->ioaddr + ATA_DRIVE, (ATA_D_IBM | ATA_MASTER));
510    DELAY(1);
511    if (inb(scp->ioaddr + ATA_CYL_LSB) == ATAPI_MAGIC_LSB &&
512	inb(scp->ioaddr + ATA_CYL_MSB) == ATAPI_MAGIC_MSB) {
513	scp->devices |= ATA_ATAPI_MASTER;
514    }
515    outb(scp->ioaddr + ATA_DRIVE, (ATA_D_IBM | ATA_SLAVE));
516    DELAY(1);
517    if (inb(scp->ioaddr + ATA_CYL_LSB) == ATAPI_MAGIC_LSB &&
518	inb(scp->ioaddr + ATA_CYL_MSB) == ATAPI_MAGIC_MSB) {
519	scp->devices |= ATA_ATAPI_SLAVE;
520    }
521    if (status0 != 0x00 && !(scp->devices & ATA_ATAPI_MASTER)) {
522    	outb(scp->ioaddr + ATA_DRIVE, (ATA_D_IBM | ATA_MASTER));
523        DELAY(1);
524        outb(scp->ioaddr + ATA_ERROR, 0x58);
525        outb(scp->ioaddr + ATA_CYL_LSB, 0xa5);
526        if (inb(scp->ioaddr + ATA_ERROR) != 0x58 &&
527	    inb(scp->ioaddr + ATA_CYL_LSB) == 0xa5) {
528	    scp->devices |= ATA_ATA_MASTER;
529        }
530    }
531    if (status1 != 0x00 && !(scp->devices & ATA_ATAPI_SLAVE)) {
532    	outb(scp->ioaddr + ATA_DRIVE, (ATA_D_IBM | ATA_SLAVE));
533        DELAY(1);
534        outb(scp->ioaddr + ATA_ERROR, 0x58);
535        outb(scp->ioaddr + ATA_CYL_LSB, 0xa5);
536        if (inb(scp->ioaddr + ATA_ERROR) != 0x58 &&
537            inb(scp->ioaddr + ATA_CYL_LSB) == 0xa5) {
538	    scp->devices |= ATA_ATA_SLAVE;
539        }
540    }
541#ifdef ATA_DEBUG
542    printf("ata%d: devices = 0x%x\n", scp->lun, scp->devices);
543#endif
544    if (!scp->devices) {
545	free(scp, M_DEVBUF);
546	return 0;
547    }
548    TAILQ_INIT(&scp->ata_queue);
549    TAILQ_INIT(&scp->atapi_queue);
550    *unit = scp->lun;
551    scp->dev = dev;
552    if (bmaddr)
553    	scp->bmaddr = bmaddr;
554    atadevices[scp->lun] = scp;
555#ifndef ATA_STATIC_ID
556    atanlun++;
557#endif
558    return ATA_IOSIZE;
559}
560
561static void
562ataintr(void *data)
563{
564    struct ata_softc *scp;
565    struct atapi_request *atapi_request;
566    struct ad_request *ad_request;
567    u_int8_t status;
568    static int32_t intr_count = 0;
569
570    scp = (struct ata_softc *)data;
571
572    /* find & call the responsible driver to process this interrupt */
573    switch (scp->active) {
574#if NATADISK > 0
575    case ATA_ACTIVE_ATA:
576    	if ((ad_request = TAILQ_FIRST(&scp->ata_queue)))
577            if (ad_interrupt(ad_request) == ATA_OP_CONTINUES)
578		return;
579	break;
580#endif
581    case ATA_ACTIVE_ATAPI:
582        if ((atapi_request = TAILQ_FIRST(&scp->atapi_queue)))
583	    if (atapi_interrupt(atapi_request) == ATA_OP_CONTINUES)
584		return;
585	break;
586
587    case ATA_WAIT_INTR:
588	wakeup((caddr_t)scp);
589	break;
590
591    case ATA_IGNORE_INTR:
592	break;
593
594    default:
595    case ATA_IDLE:
596        status = inb(scp->ioaddr + ATA_STATUS);
597	if (intr_count++ < 10)
598	    printf("ata%d: unwanted interrupt %d status = %02x\n",
599		   scp->lun, intr_count, status);
600	return;
601    }
602    scp->active = ATA_IDLE;
603    ata_start(scp);
604}
605
606void
607ata_start(struct ata_softc *scp)
608{
609    struct ad_request *ad_request;
610    struct atapi_request *atapi_request;
611
612#ifdef ATA_DEBUG
613    printf("ata_start: entered\n");
614#endif
615    if (scp->active != ATA_IDLE) {
616	printf("ata: unwanted ata_start\n");
617	return;
618    }
619
620#if NATADISK > 0
621    /* find & call the responsible driver if anything on ATA queue */
622    if ((ad_request = TAILQ_FIRST(&scp->ata_queue))) {
623	scp->active = ATA_ACTIVE_ATA;
624        ad_transfer(ad_request);
625#ifdef ATA_DEBUG
626        printf("ata_start: started ata, leaving\n");
627#endif
628	return;
629    }
630#endif
631
632    /* find & call the responsible driver if anything on ATAPI queue */
633    if ((atapi_request = TAILQ_FIRST(&scp->atapi_queue))) {
634    	scp->active = ATA_ACTIVE_ATAPI;
635	atapi_transfer(atapi_request);
636#ifdef ATA_DEBUG
637        printf("ata_start: started atapi, leaving\n");
638#endif
639	return;
640    }
641}
642
643int32_t
644ata_wait(struct ata_softc *scp, int32_t device, u_int8_t mask)
645{
646    u_int8_t status;
647    u_int32_t timeout = 0;
648
649    while (timeout++ <= 500000) {	/* timeout 5 secs */
650	status = inb(scp->ioaddr + ATA_STATUS);
651
652	/* if drive fails status, reselect the drive just to be sure */
653	if (status == 0xff) {
654       	    printf("ata%d: %s: no status, reselecting device\n",
655		   scp->lun, device?"slave":"master");
656    	    outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | device);
657	    DELAY(1);
658	    status = inb(scp->ioaddr + ATA_STATUS);
659	}
660	if (status == 0xff)
661	    return -1;
662	scp->status = status;
663	if (!(status & ATA_S_BSY)) {
664	    if (status & ATA_S_ERROR)
665		scp->error = inb(scp->ioaddr + ATA_ERROR);
666	    if ((status & mask) == mask)
667		return (status & ATA_S_ERROR);
668    	}
669	if (timeout > 1000)
670	    DELAY(1000);
671	else
672	    DELAY(10);
673    }
674    return -1;
675}
676
677int32_t
678ata_command(struct ata_softc *scp, int32_t device, u_int32_t command,
679	   u_int32_t cylinder, u_int32_t head, u_int32_t sector,
680	   u_int32_t count, u_int32_t feature, int32_t flags)
681{
682#ifdef ATA_DEBUG
683printf("ata%d: ata_command: addr=%04x, device=%02x, cmd=%02x, c=%d, h=%d, s=%d, count=%d, flags=%02x\n", scp->lun, scp->ioaddr, device, command, cylinder, head, sector, count, flags);
684#endif
685
686    /* ready to issue command ? */
687    if (ata_wait(scp, device, 0) < 0) {
688       	printf("ata%d: %s: timeout waiting to give command s=%02x e=%02x\n",
689	       scp->lun, device?"slave":"master", scp->status, scp->error);
690    }
691    outb(scp->ioaddr + ATA_FEATURE, feature);
692    outb(scp->ioaddr + ATA_CYL_LSB, cylinder);
693    outb(scp->ioaddr + ATA_CYL_MSB, cylinder >> 8);
694    outb(scp->ioaddr + ATA_DRIVE, ATA_D_IBM | device | head);
695    outb(scp->ioaddr + ATA_SECTOR, sector);
696    outb(scp->ioaddr + ATA_COUNT, count);
697
698    if (scp->active != ATA_IDLE && flags != ATA_IMMEDIATE)
699	printf("DANGER active=%d\n", scp->active);
700
701    switch (flags) {
702    case ATA_WAIT_INTR:
703        scp->active = ATA_WAIT_INTR;
704        outb(scp->ioaddr + ATA_CMD, command);
705	if (tsleep((caddr_t)scp, PRIBIO, "atacmd", 500)) {
706	    printf("ata_command: timeout waiting for interrupt\n");
707	    scp->active = ATA_IDLE;
708	    return -1;
709	}
710	break;
711
712    case ATA_IGNORE_INTR:
713        scp->active = ATA_IGNORE_INTR;
714        outb(scp->ioaddr + ATA_CMD, command);
715	break;
716
717    case ATA_IMMEDIATE:
718    default:
719        outb(scp->ioaddr + ATA_CMD, command);
720	break;
721    }
722#ifdef ATA_DEBUG
723printf("ata_command: leaving\n");
724#endif
725    return 0;
726}
727
728void
729bswap(int8_t *buf, int32_t len)
730{
731    u_int16_t *p = (u_int16_t*)(buf + len);
732
733    while (--p >= (u_int16_t*)buf)
734        *p = ntohs(*p);
735}
736
737void
738btrim(int8_t *buf, int32_t len)
739{
740    int8_t *p;
741
742    for (p = buf; p < buf+len; ++p)
743        if (!*p)
744            *p = ' ';
745    for (p = buf + len - 1; p >= buf && *p == ' '; --p)
746        *p = 0;
747}
748
749void
750bpack(int8_t *src, int8_t *dst, int32_t len)
751{
752    int32_t i, j, blank;
753
754    for (i = j = blank = 0 ; i < len-1; i++) {
755	if (blank && src[i] == ' ') continue;
756	if (blank && src[i] != ' ') {
757	    dst[j++] = src[i];
758	    blank = 0;
759	    continue;
760	}
761	if (src[i] == ' ')
762	    blank = 1;
763	dst[j++] = src[i];
764    }
765    dst[j] = 0x00;
766}
767#endif /* NATA > 0 */
768