2 * linux/drivers/ide/setup-pci.c Version 1.10 2002/08/19
4 * Copyright (c) 1998-2000 Andre Hedrick <andre@linux-ide.org>
6 * Copyright (c) 1995-1998 Mark Lord
7 * May be copied or modified under the terms of the GNU General Public License
10 * Split the set up function into multiple functions
12 * Fix misreporting of I/O v MMIO problems
13 * Initial fixups for simplex devices
17 * This module provides support for automatic detection and
18 * configuration of all PCI IDE interfaces present in a system.
21 #include <linux/config.h>
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/kernel.h>
25 #include <linux/pci.h>
26 #include <linux/init.h>
27 #include <linux/timer.h>
29 #include <linux/interrupt.h>
30 #include <linux/ide.h>
37 * ide_match_hwif - match a PCI IDE against an ide_hwif
38 * @io_base: I/O base of device
39 * @bootable: set if its bootable
40 * @name: name of device
42 * Match a PCI IDE port against an entry in ide_hwifs[],
43 * based on io_base port if possible. Return the matching hwif,
44 * or a new hwif. If we find an error (clashing, out of devices, etc)
47 * FIXME: we need to handle mmio matches here too
50 static ide_hwif_t
*ide_match_hwif(unsigned long io_base
, u8 bootable
, const char *name
)
56 * Look for a hwif with matching io_base specified using
57 * parameters to ide_setup().
59 for (h
= 0; h
< MAX_HWIFS
; ++h
) {
61 if (hwif
->io_ports
[IDE_DATA_OFFSET
] == io_base
) {
62 if (hwif
->chipset
== ide_generic
)
63 return hwif
; /* a perfect match */
67 * Look for a hwif with matching io_base default value.
68 * If chipset is "ide_unknown", then claim that hwif slot.
69 * Otherwise, some other chipset has already claimed it.. :(
71 for (h
= 0; h
< MAX_HWIFS
; ++h
) {
73 if (hwif
->io_ports
[IDE_DATA_OFFSET
] == io_base
) {
74 if (hwif
->chipset
== ide_unknown
)
75 return hwif
; /* match */
76 printk(KERN_ERR
"%s: port 0x%04lx already claimed by %s\n",
77 name
, io_base
, hwif
->name
);
78 return NULL
; /* already claimed */
82 * Okay, there is no hwif matching our io_base,
83 * so we'll just claim an unassigned slot.
84 * Give preference to claiming other slots before claiming ide0/ide1,
85 * just in case there's another interface yet-to-be-scanned
86 * which uses ports 1f0/170 (the ide0/ide1 defaults).
88 * Unless there is a bootable card that does not use the standard
89 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
92 for (h
= 0; h
< MAX_HWIFS
; ++h
) {
94 if (hwif
->chipset
== ide_unknown
)
95 return hwif
; /* pick an unused entry */
98 for (h
= 2; h
< MAX_HWIFS
; ++h
) {
100 if (hwif
->chipset
== ide_unknown
)
101 return hwif
; /* pick an unused entry */
104 for (h
= 0; h
< 2; ++h
) {
105 hwif
= ide_hwifs
+ h
;
106 if (hwif
->chipset
== ide_unknown
)
107 return hwif
; /* pick an unused entry */
109 printk(KERN_ERR
"%s: too many IDE interfaces, no room in table\n", name
);
114 * ide_setup_pci_baseregs - place a PCI IDE controller native
115 * @dev: PCI device of interface to switch native
116 * @name: Name of interface
118 * We attempt to place the PCI interface into PCI native mode. If
119 * we succeed the BARs are ok and the controller is in PCI mode.
120 * Returns 0 on success or an errno code.
122 * FIXME: if we program the interface and then fail to set the BARS
123 * we don't switch it back to legacy mode. Do we actually care ??
126 static int ide_setup_pci_baseregs (struct pci_dev
*dev
, const char *name
)
131 * Place both IDE interfaces into PCI "native" mode:
133 if (pci_read_config_byte(dev
, PCI_CLASS_PROG
, &progif
) ||
135 if ((progif
& 0xa) != 0xa) {
136 printk(KERN_INFO
"%s: device not capable of full "
137 "native PCI mode\n", name
);
140 printk("%s: placing both ports into native PCI mode\n", name
);
141 (void) pci_write_config_byte(dev
, PCI_CLASS_PROG
, progif
|5);
142 if (pci_read_config_byte(dev
, PCI_CLASS_PROG
, &progif
) ||
144 printk(KERN_ERR
"%s: rewrite of PROGIF failed, wanted "
145 "0x%04x, got 0x%04x\n",
146 name
, progif
|5, progif
);
153 #ifdef CONFIG_BLK_DEV_IDEDMA_FORCED
155 * Long lost data from 2.0.34 that is now in 2.0.39
157 * This was used in ./drivers/block/triton.c to do DMA Base address setup
158 * when PnP failed. Oh the things we forget. I believe this was part
159 * of SFF-8038i that has been withdrawn from public access... :-((
161 #define DEFAULT_BMIBA 0xe800 /* in case BIOS did not init it */
162 #define DEFAULT_BMCRBA 0xcc00 /* VIA's default value */
163 #define DEFAULT_BMALIBA 0xd400 /* ALI's default value */
164 #endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */
167 * ide_get_or_set_dma_base - setup BMIBA
170 * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space:
171 * If need be we set up the DMA base. Where a device has a partner that
172 * is already in DMA mode we check and enforce IDE simplex rules.
175 static unsigned long __init
ide_get_or_set_dma_base (ide_hwif_t
*hwif
)
177 unsigned long dma_base
= 0;
178 struct pci_dev
*dev
= hwif
->pci_dev
;
180 #ifdef CONFIG_BLK_DEV_IDEDMA_FORCED
181 int second_chance
= 0;
183 second_chance_to_dma
:
184 #endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */
186 if ((hwif
->mmio
) && (hwif
->dma_base
))
187 return hwif
->dma_base
;
189 if (hwif
->mate
&& hwif
->mate
->dma_base
) {
190 dma_base
= hwif
->mate
->dma_base
- (hwif
->channel
? 0 : 8);
192 dma_base
= (hwif
->mmio
) ?
193 ((unsigned long) hwif
->hwif_data
) :
194 (pci_resource_start(dev
, 4));
196 printk(KERN_ERR
"%s: dma_base is invalid (0x%04lx)\n",
197 hwif
->cds
->name
, dma_base
);
202 #ifdef CONFIG_BLK_DEV_IDEDMA_FORCED
203 /* FIXME - should use pci_assign_resource surely */
204 if ((!dma_base
) && (!second_chance
)) {
205 unsigned long set_bmiba
= 0;
207 switch(dev
->vendor
) {
208 case PCI_VENDOR_ID_AL
:
209 set_bmiba
= DEFAULT_BMALIBA
; break;
210 case PCI_VENDOR_ID_VIA
:
211 set_bmiba
= DEFAULT_BMCRBA
; break;
212 case PCI_VENDOR_ID_INTEL
:
213 set_bmiba
= DEFAULT_BMIBA
; break;
217 pci_write_config_dword(dev
, 0x20, set_bmiba
|1);
218 goto second_chance_to_dma
;
220 #endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */
224 dma_base
+= hwif
->channel
? 8 : 0;
226 switch(dev
->device
) {
227 case PCI_DEVICE_ID_AL_M5219
:
228 case PCI_DEVICE_ID_AL_M5229
:
229 case PCI_DEVICE_ID_AMD_VIPER_7409
:
230 case PCI_DEVICE_ID_CMD_643
:
231 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE
:
232 simplex_stat
= hwif
->INB(dma_base
+ 2);
233 hwif
->OUTB((simplex_stat
&0x60),(dma_base
+ 2));
234 simplex_stat
= hwif
->INB(dma_base
+ 2);
235 if (simplex_stat
& 0x80) {
236 printk(KERN_INFO
"%s: simplex device: "
243 * If the device claims "simplex" DMA,
244 * this means only one of the two interfaces
245 * can be trusted with DMA at any point in time.
246 * So we should enable DMA only on one of the
249 simplex_stat
= hwif
->INB(dma_base
+ 2);
250 if (simplex_stat
& 0x80) {
251 /* simplex device? */
254 * At this point we haven't probed the drives so we can't make the
255 * appropriate decision. Really we should defer this problem
256 * until we tune the drive then try to grab DMA ownership if we want
257 * to be the DMA end. This has to be become dynamic to handle hot
260 /* Don't enable DMA on a simplex channel with no drives */
261 if (!hwif
->drives
[0].present
&& !hwif
->drives
[1].present
)
263 printk(KERN_INFO
"%s: simplex device with no drives: DMA disabled\n",
267 /* If our other channel has DMA then we cannot */
270 if(hwif
->mate
&& hwif
->mate
->dma_base
)
272 printk(KERN_INFO
"%s: simplex device: "
283 void ide_setup_pci_noise (struct pci_dev
*dev
, ide_pci_device_t
*d
)
285 if ((d
->vendor
!= dev
->vendor
) && (d
->device
!= dev
->device
)) {
286 printk(KERN_INFO
"%s: unknown IDE controller at PCI slot "
287 "%s, VID=%04x, DID=%04x\n",
288 d
->name
, dev
->slot_name
, dev
->vendor
, dev
->device
);
290 printk(KERN_INFO
"%s: IDE controller at PCI slot %s\n",
291 d
->name
, dev
->slot_name
);
295 EXPORT_SYMBOL_GPL(ide_setup_pci_noise
);
299 * ide_pci_enable - do PCI enables
301 * @d: IDE pci device data
303 * Enable the IDE PCI device. We attempt to enable the device in full
304 * but if that fails then we only need BAR4 so we will enable that.
306 * Returns zero on success or an error code
309 static int ide_pci_enable(struct pci_dev
*dev
, ide_pci_device_t
*d
)
312 if (pci_enable_device(dev
)) {
313 if (pci_enable_device_bars(dev
, 1 << 4)) {
314 printk(KERN_WARNING
"%s: (ide_setup_pci_device:) "
315 "Could not enable device.\n", d
->name
);
318 printk(KERN_WARNING
"%s: BIOS configuration fixed.\n", d
->name
);
322 * assume all devices can do 32-bit dma for now. we can add a
323 * dma mask field to the ide_pci_device_t if we need it (or let
324 * lower level driver set the dma mask)
326 if (pci_set_dma_mask(dev
, 0xffffffff)) {
327 printk(KERN_ERR
"%s: can't set dma mask\n", d
->name
);
331 /* FIXME: Temporary - until we put in the hotplug interface logic
332 Check that the bits we want are not in use by someone else */
333 if (pci_request_region(dev
, 4, "ide_tmp"))
335 pci_release_region(dev
, 4);
341 * ide_pci_configure - configure an unconfigured device
343 * @d: IDE pci device data
345 * Enable and configure the PCI device we have been passed.
346 * Returns zero on success or an error code.
349 static int ide_pci_configure(struct pci_dev
*dev
, ide_pci_device_t
*d
)
353 * PnP BIOS was *supposed* to have setup this device, but we
354 * can do it ourselves, so long as the BIOS has assigned an IRQ
355 * (or possibly the device is using a "legacy header" for IRQs).
356 * Maybe the user deliberately *disabled* the device,
357 * but we'll eventually ignore it again if no drives respond.
359 if (ide_setup_pci_baseregs(dev
, d
->name
) || pci_write_config_word(dev
, PCI_COMMAND
, pcicmd
|PCI_COMMAND_IO
))
361 printk(KERN_INFO
"%s: device disabled (BIOS)\n", d
->name
);
364 if (pci_read_config_word(dev
, PCI_COMMAND
, &pcicmd
)) {
365 printk(KERN_ERR
"%s: error accessing PCI regs\n", d
->name
);
368 if (!(pcicmd
& PCI_COMMAND_IO
)) {
369 printk(KERN_ERR
"%s: unable to enable IDE controller\n", d
->name
);
376 * ide_pci_check_iomem - check a register is I/O
381 * Checks if a BAR is configured and points to MMIO space. If so
382 * print an error and return an error code. Otherwise return 0
385 static int ide_pci_check_iomem(struct pci_dev
*dev
, ide_pci_device_t
*d
, int bar
)
387 ulong flags
= pci_resource_flags(dev
, bar
);
390 if (!flags
|| pci_resource_len(dev
, bar
) == 0)
394 if(flags
& PCI_BASE_ADDRESS_IO_MASK
)
398 printk(KERN_ERR
"%s: IO baseregs (BIOS) are reported "
400 "<andre@linux-ide.org>.\n", d
->name
);
405 * ide_hwif_configure - configure an IDE interface
406 * @dev: PCI device holding interface
408 * @mate: Paired interface if any
410 * Perform the initial set up for the hardware interface structure. This
411 * is done per interface port rather than per PCI device. There may be
412 * more than one port per device.
414 * Returns the new hardware interface structure, or NULL on a failure
417 static ide_hwif_t
*ide_hwif_configure(struct pci_dev
*dev
, ide_pci_device_t
*d
, ide_hwif_t
*mate
, int port
, int irq
)
419 unsigned long ctl
= 0, base
= 0;
424 /* Possibly we should fail if these checks report true */
425 ide_pci_check_iomem(dev
, d
, 2*port
);
426 ide_pci_check_iomem(dev
, d
, 2*port
+1);
428 ctl
= pci_resource_start(dev
, 2*port
+1);
429 base
= pci_resource_start(dev
, 2*port
);
430 if ((ctl
&& !base
) || (base
&& !ctl
)) {
431 printk(KERN_ERR
"%s: inconsistent baseregs (BIOS) "
432 "for port %d, skipping\n", d
->name
, port
);
438 /* Use default values */
439 ctl
= port
? 0x374 : 0x3f4;
440 base
= port
? 0x170 : 0x1f0;
442 if ((hwif
= ide_match_hwif(base
, d
->bootable
, d
->name
)) == NULL
)
443 return NULL
; /* no room in ide_hwifs[] */
444 if (hwif
->io_ports
[IDE_DATA_OFFSET
] != base
) {
446 ide_init_hwif_ports(&hwif
->hw
, base
, (ctl
| 2), NULL
);
447 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->io_ports
));
448 hwif
->noprobe
= !hwif
->io_ports
[IDE_DATA_OFFSET
];
449 } else if (hwif
->io_ports
[IDE_CONTROL_OFFSET
] != (ctl
| 2)) {
452 hwif
->chipset
= ide_pci
;
454 hwif
->cds
= (struct ide_pci_device_s
*) d
;
455 hwif
->channel
= port
;
467 * ide_hwif_setup_dma - configure DMA interface
470 * @hwif: Hardware interface we are configuring
472 * Set up the DMA base for the interface. Enable the master bits as
473 * necessary and attempt to bring the device DMA into a ready to use
477 static void ide_hwif_setup_dma(struct pci_dev
*dev
, ide_pci_device_t
*d
, ide_hwif_t
*hwif
)
480 pci_read_config_word(dev
, PCI_COMMAND
, &pcicmd
);
482 if ((d
->autodma
== AUTODMA
) ||
483 ((dev
->class >> 8) == PCI_CLASS_STORAGE_IDE
&&
484 (dev
->class & 0x80))) {
485 unsigned long dma_base
= ide_get_or_set_dma_base(hwif
);
486 if (dma_base
&& !(pcicmd
& PCI_COMMAND_MASTER
)) {
488 * Set up BM-DMA capability
489 * (PnP BIOS should have done this)
491 if (!((d
->device
== PCI_DEVICE_ID_CYRIX_5530_IDE
&& d
->vendor
== PCI_VENDOR_ID_CYRIX
)
492 ||(d
->device
== PCI_DEVICE_ID_NS_SCx200_IDE
&& d
->vendor
== PCI_VENDOR_ID_NS
)))
495 * default DMA off if we had to
501 if (pci_read_config_word(dev
, PCI_COMMAND
, &pcicmd
) || !(pcicmd
& PCI_COMMAND_MASTER
)) {
502 printk(KERN_ERR
"%s: %s error updating PCICMD\n",
503 hwif
->name
, d
->name
);
509 d
->init_dma(hwif
, dma_base
);
511 ide_setup_dma(hwif
, dma_base
, 8);
514 printk(KERN_INFO
"%s: %s Bus-Master DMA disabled "
515 "(BIOS)\n", hwif
->name
, d
->name
);
521 * ide_setup_pci_controller - set up IDE PCI
524 * @noisy: verbose flag
525 * @config: returned as 1 if we configured the hardware
527 * Set up the PCI and controller side of the IDE interface. This brings
528 * up the PCI side of the device, checks that the device is enabled
529 * and enables it if need be
532 static int ide_setup_pci_controller(struct pci_dev
*dev
, ide_pci_device_t
*d
, int noisy
, int *config
)
542 ide_setup_pci_noise(dev
, d
);
544 if (ide_pci_enable(dev
, d
))
547 if (pci_read_config_word(dev
, PCI_COMMAND
, &pcicmd
)) {
548 printk(KERN_ERR
"%s: error accessing PCI regs\n", d
->name
);
551 if (!(pcicmd
& PCI_COMMAND_IO
)) { /* is device disabled? */
552 if (ide_pci_configure(dev
, d
))
554 /* default DMA off if we had to configure it here */
557 printk(KERN_INFO
"%s: device enabled (Linux)\n", d
->name
);
560 pci_read_config_dword(dev
, PCI_CLASS_REVISION
, &class_rev
);
563 printk(KERN_INFO
"%s: chipset revision %d\n", d
->name
, class_rev
);
568 * ide_pci_setup_ports - configure ports/devices on PCI IDE
570 * @d: IDE pci device info
571 * @autodma: Should we enable DMA
573 * @index: ata index to update
575 * Scan the interfaces attached to this device and do any
576 * necessary per port setup. Attach the devices and ask the
577 * generic DMA layer to do its work for us.
579 * Normally called automaticall from do_ide_pci_setup_device,
580 * but is also used directly as a helper function by some controllers
581 * where the chipset setup is not the default PCI IDE one.
584 void ide_pci_setup_ports(struct pci_dev
*dev
, ide_pci_device_t
*d
, int autodma
, int pciirq
, ata_index_t
*index
)
587 int at_least_one_hwif_enabled
= 0;
588 ide_hwif_t
*hwif
, *mate
= NULL
;
589 static int secondpdc
= 0;
590 int drive0_tune
, drive1_tune
;
596 * Set up the IDE ports
599 for (port
= 0; port
<= 1; ++port
) {
600 ide_pci_enablebit_t
*e
= &(d
->enablebits
[port
]);
603 * If this is a Promise FakeRaid controller,
604 * the 2nd controller will be marked as
605 * disabled while it is actually there and enabled
606 * by the bios for raid purposes.
607 * Skip the normal "is it enabled" test for those.
609 if (((d
->vendor
== PCI_VENDOR_ID_PROMISE
) &&
610 ((d
->device
== PCI_DEVICE_ID_PROMISE_20262
) ||
611 (d
->device
== PCI_DEVICE_ID_PROMISE_20265
))) &&
612 (secondpdc
++==1) && (port
==1))
615 if (e
->reg
&& (pci_read_config_byte(dev
, e
->reg
, &tmp
) ||
616 (tmp
& e
->mask
) != e
->val
))
617 continue; /* port not enabled */
620 if (d
->channels
<= port
)
623 if ((hwif
= ide_hwif_configure(dev
, d
, mate
, port
, pciirq
)) == NULL
)
626 /* setup proper ancestral information */
627 hwif
->gendev
.parent
= &dev
->dev
;
630 index
->b
.high
= hwif
->index
;
632 index
->b
.low
= hwif
->index
;
639 if (d
->autodma
== NODMA
)
640 goto bypass_legacy_dma
;
641 if (d
->autodma
== NOAUTODMA
)
646 if(d
->init_setup_dma
)
647 d
->init_setup_dma(dev
, d
, hwif
);
649 ide_hwif_setup_dma(dev
, d
, hwif
);
652 drive0_tune
= hwif
->drives
[0].autotune
;
653 drive1_tune
= hwif
->drives
[1].autotune
;
656 /* Call chipset-specific routine
657 * for each enabled hwif
662 * This is in the wrong place. The driver may
663 * do set up based on the autotune value and this
664 * will then trash it. Torben please move it and
665 * propagate the fixes into the drivers
667 if (drive0_tune
== IDE_TUNE_BIOS
) /* biostimings */
668 hwif
->drives
[0].autotune
= IDE_TUNE_BIOS
;
669 if (drive1_tune
== IDE_TUNE_BIOS
)
670 hwif
->drives
[1].autotune
= IDE_TUNE_BIOS
;
673 at_least_one_hwif_enabled
= 1;
675 if (!at_least_one_hwif_enabled
)
676 printk(KERN_INFO
"%s: neither IDE port enabled (BIOS)\n", d
->name
);
679 EXPORT_SYMBOL_GPL(ide_pci_setup_ports
);
682 * ide_setup_pci_device() looks at the primary/secondary interfaces
683 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
684 * for use with them. This generic code works for most PCI chipsets.
686 * One thing that is not standardized is the location of the
687 * primary/secondary interface "enable/disable" bits. For chipsets that
688 * we "know" about, this information is in the ide_pci_device_t struct;
689 * for all other chipsets, we just assume both interfaces are enabled.
691 static ata_index_t
do_ide_setup_pci_device (struct pci_dev
*dev
, ide_pci_device_t
*d
, u8 noisy
)
695 int tried_config
= 0;
696 ata_index_t index
= { .b
= { .low
= 0xff, .high
= 0xff } };
698 if((autodma
= ide_setup_pci_controller(dev
, d
, noisy
, &tried_config
)) < 0)
702 * Can we trust the reported IRQ?
706 if ((dev
->class & ~(0xfa)) != ((PCI_CLASS_STORAGE_IDE
<< 8) | 5)) {
708 printk(KERN_INFO
"%s: not 100%% native mode: "
709 "will probe irqs later\n", d
->name
);
711 * This allows offboard ide-pci cards the enable a BIOS,
712 * verify interrupt settings of split-mirror pci-config
713 * space, place chipset into init-mode, and/or preserve
714 * an interrupt if the card is not native ide support.
716 pciirq
= (d
->init_chipset
) ? d
->init_chipset(dev
, d
->name
) : 0;
717 } else if (tried_config
) {
719 printk(KERN_INFO
"%s: will probe irqs later\n", d
->name
);
721 } else if (!pciirq
) {
723 printk(KERN_WARNING
"%s: bad irq (%d): will probe later\n",
729 if(d
->init_chipset(dev
, d
->name
) < 0)
734 printk(KERN_INFO
"%s: 100%% native mode on irq %s\n",
735 d
->name
, __irq_itoa(pciirq
));
737 printk(KERN_INFO
"%s: 100%% native mode on irq %d\n",
742 if(pciirq
< 0) /* Error not an IRQ */
745 ide_pci_setup_ports(dev
, d
, autodma
, pciirq
, &index
);
750 void ide_setup_pci_device (struct pci_dev
*dev
, ide_pci_device_t
*d
)
752 ata_index_t index_list
= do_ide_setup_pci_device(dev
, d
, 1);
754 if ((index_list
.b
.low
& 0xf0) != 0xf0)
755 probe_hwif_init(&ide_hwifs
[index_list
.b
.low
]);
756 if ((index_list
.b
.high
& 0xf0) != 0xf0)
757 probe_hwif_init(&ide_hwifs
[index_list
.b
.high
]);
760 EXPORT_SYMBOL_GPL(ide_setup_pci_device
);
762 void ide_setup_pci_devices (struct pci_dev
*dev
, struct pci_dev
*dev2
, ide_pci_device_t
*d
)
764 ata_index_t index_list
= do_ide_setup_pci_device(dev
, d
, 1);
765 ata_index_t index_list2
= do_ide_setup_pci_device(dev2
, d
, 0);
767 if ((index_list
.b
.low
& 0xf0) != 0xf0)
768 probe_hwif_init(&ide_hwifs
[index_list
.b
.low
]);
769 if ((index_list
.b
.high
& 0xf0) != 0xf0)
770 probe_hwif_init(&ide_hwifs
[index_list
.b
.high
]);
771 if ((index_list2
.b
.low
& 0xf0) != 0xf0)
772 probe_hwif_init(&ide_hwifs
[index_list2
.b
.low
]);
773 if ((index_list2
.b
.high
& 0xf0) != 0xf0)
774 probe_hwif_init(&ide_hwifs
[index_list2
.b
.high
]);
777 EXPORT_SYMBOL_GPL(ide_setup_pci_devices
);
783 static int pre_init
= 1; /* Before first ordered IDE scan */
784 static LIST_HEAD(ide_pci_drivers
);
787 * ide_register_pci_driver - attach IDE driver
788 * @driver: pci driver
790 * Registers a driver with the IDE layer. The IDE layer arranges that
791 * boot time setup is done in the expected device order and then
792 * hands the controllers off to the core PCI code to do the rest of
795 * The driver_data of the driver table must point to an ide_pci_device_t
796 * describing the interface.
798 * Returns are the same as for pci_register_driver
801 int ide_pci_register_driver(struct pci_driver
*driver
)
804 return pci_module_init(driver
);
805 list_add_tail(&driver
->node
, &ide_pci_drivers
);
809 EXPORT_SYMBOL_GPL(ide_pci_register_driver
);
812 * ide_unregister_pci_driver - unregister an IDE driver
813 * @driver: driver to remove
815 * Unregister a currently installed IDE driver. Returns are the same
816 * as for pci_unregister_driver
819 void ide_pci_unregister_driver(struct pci_driver
*driver
)
822 pci_unregister_driver(driver
);
824 list_del(&driver
->node
);
827 EXPORT_SYMBOL_GPL(ide_pci_unregister_driver
);
830 * ide_scan_pcidev - find an IDE driver for a device
831 * @dev: PCI device to check
833 * Look for an IDE driver to handle the device we are considering.
834 * This is only used during boot up to get the ordering correct. After
835 * boot up the pci layer takes over the job.
838 static int __init
ide_scan_pcidev(struct pci_dev
*dev
)
841 struct pci_driver
*d
;
843 list_for_each(l
, &ide_pci_drivers
)
845 d
= list_entry(l
, struct pci_driver
, node
);
848 const struct pci_device_id
*id
= pci_match_device(d
->id_table
, dev
);
851 if(d
->probe(dev
, id
) >= 0)
863 * ide_scan_pcibus - perform the initial IDE driver scan
864 * @scan_direction: set for reverse order scanning
866 * Perform the initial bus rather than driver ordered scan of the
867 * PCI drivers. After this all IDE pci handling becomes standard
868 * module ordering not traditionally ordered.
871 void __init
ide_scan_pcibus (int scan_direction
)
874 struct pci_driver
*d
;
875 struct list_head
*l
, *n
;
878 if (!scan_direction
) {
879 pci_for_each_dev(dev
) {
880 ide_scan_pcidev(dev
);
883 pci_for_each_dev_reverse(dev
) {
884 ide_scan_pcidev(dev
);
889 * Hand the drivers over to the PCI layer now we
893 list_for_each_safe(l
, n
, &ide_pci_drivers
)
896 d
= list_entry(l
, struct pci_driver
, node
);
897 pci_register_driver(d
);