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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/ide/setup-pci.c Version 1.10 2002/08/19
3 *
4 * Copyright (c) 1998-2000 Andre Hedrick <andre@linux-ide.org>
5 *
6 * Copyright (c) 1995-1998 Mark Lord
7 * May be copied or modified under the terms of the GNU General Public License
8 *
9 * Recent Changes
10 * Split the set up function into multiple functions
11 * Use pci_set_master
12 * Fix misreporting of I/O v MMIO problems
13 * Initial fixups for simplex devices
14 */
15
16/*
17 * This module provides support for automatic detection and
18 * configuration of all PCI IDE interfaces present in a system.
19 */
20
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>
28#include <linux/mm.h>
29#include <linux/interrupt.h>
30#include <linux/ide.h>
31#include <linux/dma-mapping.h>
32
33#include <asm/io.h>
34#include <asm/irq.h>
35
36
37/**
38 * ide_match_hwif - match a PCI IDE against an ide_hwif
39 * @io_base: I/O base of device
40 * @bootable: set if its bootable
41 * @name: name of device
42 *
43 * Match a PCI IDE port against an entry in ide_hwifs[],
44 * based on io_base port if possible. Return the matching hwif,
45 * or a new hwif. If we find an error (clashing, out of devices, etc)
46 * return NULL
47 *
48 * FIXME: we need to handle mmio matches here too
49 */
50
51static ide_hwif_t *ide_match_hwif(unsigned long io_base, u8 bootable, const char *name)
52{
53 int h;
54 ide_hwif_t *hwif;
55
56 /*
57 * Look for a hwif with matching io_base specified using
58 * parameters to ide_setup().
59 */
60 for (h = 0; h < MAX_HWIFS; ++h) {
61 hwif = &ide_hwifs[h];
62 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
63 if (hwif->chipset == ide_forced)
64 return hwif; /* a perfect match */
65 }
66 }
67 /*
68 * Look for a hwif with matching io_base default value.
69 * If chipset is "ide_unknown", then claim that hwif slot.
70 * Otherwise, some other chipset has already claimed it.. :(
71 */
72 for (h = 0; h < MAX_HWIFS; ++h) {
73 hwif = &ide_hwifs[h];
74 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
75 if (hwif->chipset == ide_unknown)
76 return hwif; /* match */
77 printk(KERN_ERR "%s: port 0x%04lx already claimed by %s\n",
78 name, io_base, hwif->name);
79 return NULL; /* already claimed */
80 }
81 }
82 /*
83 * Okay, there is no hwif matching our io_base,
84 * so we'll just claim an unassigned slot.
85 * Give preference to claiming other slots before claiming ide0/ide1,
86 * just in case there's another interface yet-to-be-scanned
87 * which uses ports 1f0/170 (the ide0/ide1 defaults).
88 *
89 * Unless there is a bootable card that does not use the standard
90 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
91 */
92 if (bootable) {
93 for (h = 0; h < MAX_HWIFS; ++h) {
94 hwif = &ide_hwifs[h];
95 if (hwif->chipset == ide_unknown)
96 return hwif; /* pick an unused entry */
97 }
98 } else {
99 for (h = 2; h < MAX_HWIFS; ++h) {
100 hwif = ide_hwifs + h;
101 if (hwif->chipset == ide_unknown)
102 return hwif; /* pick an unused entry */
103 }
104 }
105 for (h = 0; h < 2; ++h) {
106 hwif = ide_hwifs + h;
107 if (hwif->chipset == ide_unknown)
108 return hwif; /* pick an unused entry */
109 }
110 printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", name);
111 return NULL;
112}
113
114/**
115 * ide_setup_pci_baseregs - place a PCI IDE controller native
116 * @dev: PCI device of interface to switch native
117 * @name: Name of interface
118 *
119 * We attempt to place the PCI interface into PCI native mode. If
120 * we succeed the BARs are ok and the controller is in PCI mode.
121 * Returns 0 on success or an errno code.
122 *
123 * FIXME: if we program the interface and then fail to set the BARS
124 * we don't switch it back to legacy mode. Do we actually care ??
125 */
126
127static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
128{
129 u8 progif = 0;
130
131 /*
132 * Place both IDE interfaces into PCI "native" mode:
133 */
134 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
135 (progif & 5) != 5) {
136 if ((progif & 0xa) != 0xa) {
137 printk(KERN_INFO "%s: device not capable of full "
138 "native PCI mode\n", name);
139 return -EOPNOTSUPP;
140 }
141 printk("%s: placing both ports into native PCI mode\n", name);
142 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
143 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
144 (progif & 5) != 5) {
145 printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
146 "0x%04x, got 0x%04x\n",
147 name, progif|5, progif);
148 return -EOPNOTSUPP;
149 }
150 }
151 return 0;
152}
153
154#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
155
156#ifdef CONFIG_BLK_DEV_IDEDMA_FORCED
157/*
158 * Long lost data from 2.0.34 that is now in 2.0.39
159 *
160 * This was used in ./drivers/block/triton.c to do DMA Base address setup
161 * when PnP failed. Oh the things we forget. I believe this was part
162 * of SFF-8038i that has been withdrawn from public access... :-((
163 */
164#define DEFAULT_BMIBA 0xe800 /* in case BIOS did not init it */
165#define DEFAULT_BMCRBA 0xcc00 /* VIA's default value */
166#define DEFAULT_BMALIBA 0xd400 /* ALI's default value */
167#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */
168
169/**
170 * ide_get_or_set_dma_base - setup BMIBA
171 * @hwif: Interface
172 *
173 * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space:
174 * If need be we set up the DMA base. Where a device has a partner that
175 * is already in DMA mode we check and enforce IDE simplex rules.
176 */
177
178static unsigned long ide_get_or_set_dma_base (ide_hwif_t *hwif)
179{
180 unsigned long dma_base = 0;
181 struct pci_dev *dev = hwif->pci_dev;
182
183#ifdef CONFIG_BLK_DEV_IDEDMA_FORCED
184 int second_chance = 0;
185
186second_chance_to_dma:
187#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */
188
189 if (hwif->mmio)
190 return hwif->dma_base;
191
192 if (hwif->mate && hwif->mate->dma_base) {
193 dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
194 } else {
195 dma_base = pci_resource_start(dev, 4);
196 if (!dma_base) {
197 printk(KERN_ERR "%s: dma_base is invalid\n",
198 hwif->cds->name);
199 }
200 }
201
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;
206 second_chance++;
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;
214 default:
215 return dma_base;
216 }
217 pci_write_config_dword(dev, 0x20, set_bmiba|1);
218 goto second_chance_to_dma;
219 }
220#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */
221
222 if (dma_base) {
223 u8 simplex_stat = 0;
224 dma_base += hwif->channel ? 8 : 0;
225
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:
Matt Gillette2f09a7f2005-08-18 22:27:07 +0200232 case PCI_DEVICE_ID_REVOLUTION:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 simplex_stat = hwif->INB(dma_base + 2);
234 hwif->OUTB((simplex_stat&0x60),(dma_base + 2));
235 simplex_stat = hwif->INB(dma_base + 2);
236 if (simplex_stat & 0x80) {
237 printk(KERN_INFO "%s: simplex device: "
238 "DMA forced\n",
239 hwif->cds->name);
240 }
241 break;
242 default:
243 /*
244 * If the device claims "simplex" DMA,
245 * this means only one of the two interfaces
246 * can be trusted with DMA at any point in time.
247 * So we should enable DMA only on one of the
248 * two interfaces.
249 */
250 simplex_stat = hwif->INB(dma_base + 2);
251 if (simplex_stat & 0x80) {
252 /* simplex device? */
253/*
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
258 * plug.
259 */
260 if (hwif->mate && hwif->mate->dma_base) {
261 printk(KERN_INFO "%s: simplex device: "
262 "DMA disabled\n",
263 hwif->cds->name);
264 dma_base = 0;
265 }
266 }
267 }
268 }
269 return dma_base;
270}
271#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
272
273void ide_setup_pci_noise (struct pci_dev *dev, ide_pci_device_t *d)
274{
275 printk(KERN_INFO "%s: IDE controller at PCI slot %s\n",
276 d->name, pci_name(dev));
277}
278
279EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
280
281
282/**
283 * ide_pci_enable - do PCI enables
284 * @dev: PCI device
285 * @d: IDE pci device data
286 *
287 * Enable the IDE PCI device. We attempt to enable the device in full
288 * but if that fails then we only need BAR4 so we will enable that.
289 *
290 * Returns zero on success or an error code
291 */
292
293static int ide_pci_enable(struct pci_dev *dev, ide_pci_device_t *d)
294{
295 int ret;
296
297 if (pci_enable_device(dev)) {
298 ret = pci_enable_device_bars(dev, 1 << 4);
299 if (ret < 0) {
300 printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
301 "Could not enable device.\n", d->name);
302 goto out;
303 }
304 printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
305 }
306
307 /*
308 * assume all devices can do 32-bit dma for now. we can add a
309 * dma mask field to the ide_pci_device_t if we need it (or let
310 * lower level driver set the dma mask)
311 */
312 ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
313 if (ret < 0) {
314 printk(KERN_ERR "%s: can't set dma mask\n", d->name);
315 goto out;
316 }
317
318 /* FIXME: Temporary - until we put in the hotplug interface logic
319 Check that the bits we want are not in use by someone else. */
320 ret = pci_request_region(dev, 4, "ide_tmp");
321 if (ret < 0)
322 goto out;
323
324 pci_release_region(dev, 4);
325out:
326 return ret;
327}
328
329/**
330 * ide_pci_configure - configure an unconfigured device
331 * @dev: PCI device
332 * @d: IDE pci device data
333 *
334 * Enable and configure the PCI device we have been passed.
335 * Returns zero on success or an error code.
336 */
337
338static int ide_pci_configure(struct pci_dev *dev, ide_pci_device_t *d)
339{
340 u16 pcicmd = 0;
341 /*
342 * PnP BIOS was *supposed* to have setup this device, but we
343 * can do it ourselves, so long as the BIOS has assigned an IRQ
344 * (or possibly the device is using a "legacy header" for IRQs).
345 * Maybe the user deliberately *disabled* the device,
346 * but we'll eventually ignore it again if no drives respond.
347 */
348 if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO))
349 {
350 printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
351 return -ENODEV;
352 }
353 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
354 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
355 return -EIO;
356 }
357 if (!(pcicmd & PCI_COMMAND_IO)) {
358 printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
359 return -ENXIO;
360 }
361 return 0;
362}
363
364/**
365 * ide_pci_check_iomem - check a register is I/O
366 * @dev: pci device
367 * @d: ide_pci_device
368 * @bar: bar number
369 *
370 * Checks if a BAR is configured and points to MMIO space. If so
371 * print an error and return an error code. Otherwise return 0
372 */
373
374static int ide_pci_check_iomem(struct pci_dev *dev, ide_pci_device_t *d, int bar)
375{
376 ulong flags = pci_resource_flags(dev, bar);
377
378 /* Unconfigured ? */
379 if (!flags || pci_resource_len(dev, bar) == 0)
380 return 0;
381
382 /* I/O space */
383 if(flags & PCI_BASE_ADDRESS_IO_MASK)
384 return 0;
385
386 /* Bad */
387 printk(KERN_ERR "%s: IO baseregs (BIOS) are reported "
388 "as MEM, report to "
389 "<andre@linux-ide.org>.\n", d->name);
390 return -EINVAL;
391}
392
393/**
394 * ide_hwif_configure - configure an IDE interface
395 * @dev: PCI device holding interface
396 * @d: IDE pci data
397 * @mate: Paired interface if any
398 *
399 * Perform the initial set up for the hardware interface structure. This
400 * is done per interface port rather than per PCI device. There may be
401 * more than one port per device.
402 *
403 * Returns the new hardware interface structure, or NULL on a failure
404 */
405
406static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *mate, int port, int irq)
407{
408 unsigned long ctl = 0, base = 0;
409 ide_hwif_t *hwif;
410
411 if ((d->flags & IDEPCI_FLAG_ISA_PORTS) == 0) {
412 /* Possibly we should fail if these checks report true */
413 ide_pci_check_iomem(dev, d, 2*port);
414 ide_pci_check_iomem(dev, d, 2*port+1);
415
416 ctl = pci_resource_start(dev, 2*port+1);
417 base = pci_resource_start(dev, 2*port);
418 if ((ctl && !base) || (base && !ctl)) {
419 printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
420 "for port %d, skipping\n", d->name, port);
421 return NULL;
422 }
423 }
424 if (!ctl)
425 {
426 /* Use default values */
427 ctl = port ? 0x374 : 0x3f4;
428 base = port ? 0x170 : 0x1f0;
429 }
430 if ((hwif = ide_match_hwif(base, d->bootable, d->name)) == NULL)
431 return NULL; /* no room in ide_hwifs[] */
432 if (hwif->io_ports[IDE_DATA_OFFSET] != base ||
433 hwif->io_ports[IDE_CONTROL_OFFSET] != (ctl | 2)) {
434 memset(&hwif->hw, 0, sizeof(hwif->hw));
435#ifndef IDE_ARCH_OBSOLETE_INIT
436 ide_std_init_ports(&hwif->hw, base, (ctl | 2));
437 hwif->hw.io_ports[IDE_IRQ_OFFSET] = 0;
438#else
439 ide_init_hwif_ports(&hwif->hw, base, (ctl | 2), NULL);
440#endif
441 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
442 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
443 }
444 hwif->chipset = ide_pci;
445 hwif->pci_dev = dev;
446 hwif->cds = (struct ide_pci_device_s *) d;
447 hwif->channel = port;
448
449 if (!hwif->irq)
450 hwif->irq = irq;
451 if (mate) {
452 hwif->mate = mate;
453 mate->mate = hwif;
454 }
455 return hwif;
456}
457
458/**
459 * ide_hwif_setup_dma - configure DMA interface
460 * @dev: PCI device
461 * @d: IDE pci data
462 * @hwif: Hardware interface we are configuring
463 *
464 * Set up the DMA base for the interface. Enable the master bits as
465 * necessary and attempt to bring the device DMA into a ready to use
466 * state
467 */
468
469#ifndef CONFIG_BLK_DEV_IDEDMA_PCI
470static void ide_hwif_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif)
471{
472}
473#else
474static void ide_hwif_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif)
475{
476 u16 pcicmd;
477 pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
478
479 if ((d->autodma == AUTODMA) ||
480 ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
481 (dev->class & 0x80))) {
482 unsigned long dma_base = ide_get_or_set_dma_base(hwif);
483 if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
484 /*
485 * Set up BM-DMA capability
486 * (PnP BIOS should have done this)
487 */
488 /* default DMA off if we had to configure it here */
489 hwif->autodma = 0;
490 pci_set_master(dev);
491 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
492 printk(KERN_ERR "%s: %s error updating PCICMD\n",
493 hwif->name, d->name);
494 dma_base = 0;
495 }
496 }
497 if (dma_base) {
498 if (d->init_dma) {
499 d->init_dma(hwif, dma_base);
500 } else {
501 ide_setup_dma(hwif, dma_base, 8);
502 }
503 } else {
504 printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
505 "(BIOS)\n", hwif->name, d->name);
506 }
507 }
508}
509
510#ifndef CONFIG_IDEDMA_PCI_AUTO
511#warning CONFIG_IDEDMA_PCI_AUTO=n support is obsolete, and will be removed soon.
512#endif
513
514#endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/
515
516/**
517 * ide_setup_pci_controller - set up IDE PCI
518 * @dev: PCI device
519 * @d: IDE PCI data
520 * @noisy: verbose flag
521 * @config: returned as 1 if we configured the hardware
522 *
523 * Set up the PCI and controller side of the IDE interface. This brings
524 * up the PCI side of the device, checks that the device is enabled
525 * and enables it if need be
526 */
527
528static int ide_setup_pci_controller(struct pci_dev *dev, ide_pci_device_t *d, int noisy, int *config)
529{
530 int ret;
531 u32 class_rev;
532 u16 pcicmd;
533
534 if (noisy)
535 ide_setup_pci_noise(dev, d);
536
537 ret = ide_pci_enable(dev, d);
538 if (ret < 0)
539 goto out;
540
541 ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
542 if (ret < 0) {
543 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
544 goto out;
545 }
546 if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */
547 ret = ide_pci_configure(dev, d);
548 if (ret < 0)
549 goto out;
550 *config = 1;
551 printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
552 }
553
554 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
555 class_rev &= 0xff;
556 if (noisy)
557 printk(KERN_INFO "%s: chipset revision %d\n", d->name, class_rev);
558out:
559 return ret;
560}
561
562/**
563 * ide_pci_setup_ports - configure ports/devices on PCI IDE
564 * @dev: PCI device
565 * @d: IDE pci device info
566 * @pciirq: IRQ line
567 * @index: ata index to update
568 *
569 * Scan the interfaces attached to this device and do any
570 * necessary per port setup. Attach the devices and ask the
571 * generic DMA layer to do its work for us.
572 *
573 * Normally called automaticall from do_ide_pci_setup_device,
574 * but is also used directly as a helper function by some controllers
575 * where the chipset setup is not the default PCI IDE one.
576 */
577
578void ide_pci_setup_ports(struct pci_dev *dev, ide_pci_device_t *d, int pciirq, ata_index_t *index)
579{
580 int port;
581 int at_least_one_hwif_enabled = 0;
582 ide_hwif_t *hwif, *mate = NULL;
583 static int secondpdc = 0;
584 u8 tmp;
585
586 index->all = 0xf0f0;
587
588 /*
589 * Set up the IDE ports
590 */
591
592 for (port = 0; port <= 1; ++port) {
593 ide_pci_enablebit_t *e = &(d->enablebits[port]);
594
595 /*
596 * If this is a Promise FakeRaid controller,
597 * the 2nd controller will be marked as
598 * disabled while it is actually there and enabled
599 * by the bios for raid purposes.
600 * Skip the normal "is it enabled" test for those.
601 */
602 if ((d->flags & IDEPCI_FLAG_FORCE_PDC) &&
603 (secondpdc++==1) && (port==1))
604 goto controller_ok;
605
606 if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
607 (tmp & e->mask) != e->val))
608 continue; /* port not enabled */
609controller_ok:
610
611 if (d->channels <= port)
612 break;
613
614 if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
615 continue;
616
617 /* setup proper ancestral information */
618 hwif->gendev.parent = &dev->dev;
619
620 if (hwif->channel) {
621 index->b.high = hwif->index;
622 } else {
623 index->b.low = hwif->index;
624 }
625
626
627 if (d->init_iops)
628 d->init_iops(hwif);
629
630 if (d->autodma == NODMA)
631 goto bypass_legacy_dma;
632
633 if(d->init_setup_dma)
634 d->init_setup_dma(dev, d, hwif);
635 else
636 ide_hwif_setup_dma(dev, d, hwif);
637bypass_legacy_dma:
638 if (d->init_hwif)
639 /* Call chipset-specific routine
640 * for each enabled hwif
641 */
642 d->init_hwif(hwif);
643
644 mate = hwif;
645 at_least_one_hwif_enabled = 1;
646 }
647 if (!at_least_one_hwif_enabled)
648 printk(KERN_INFO "%s: neither IDE port enabled (BIOS)\n", d->name);
649}
650
651EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
652
653/*
654 * ide_setup_pci_device() looks at the primary/secondary interfaces
655 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
656 * for use with them. This generic code works for most PCI chipsets.
657 *
658 * One thing that is not standardized is the location of the
659 * primary/secondary interface "enable/disable" bits. For chipsets that
660 * we "know" about, this information is in the ide_pci_device_t struct;
661 * for all other chipsets, we just assume both interfaces are enabled.
662 */
663static int do_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t *d,
664 ata_index_t *index, u8 noisy)
665{
666 static ata_index_t ata_index = { .b = { .low = 0xff, .high = 0xff } };
667 int tried_config = 0;
668 int pciirq, ret;
669
670 ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
671 if (ret < 0)
672 goto out;
673
674 /*
675 * Can we trust the reported IRQ?
676 */
677 pciirq = dev->irq;
678
679 /* Is it an "IDE storage" device in non-PCI mode? */
680 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
681 if (noisy)
682 printk(KERN_INFO "%s: not 100%% native mode: "
683 "will probe irqs later\n", d->name);
684 /*
685 * This allows offboard ide-pci cards the enable a BIOS,
686 * verify interrupt settings of split-mirror pci-config
687 * space, place chipset into init-mode, and/or preserve
688 * an interrupt if the card is not native ide support.
689 */
690 ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
691 if (ret < 0)
692 goto out;
693 pciirq = ret;
694 } else if (tried_config) {
695 if (noisy)
696 printk(KERN_INFO "%s: will probe irqs later\n", d->name);
697 pciirq = 0;
698 } else if (!pciirq) {
699 if (noisy)
700 printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
701 d->name, pciirq);
702 pciirq = 0;
703 } else {
704 if (d->init_chipset) {
705 ret = d->init_chipset(dev, d->name);
706 if (ret < 0)
707 goto out;
708 }
709 if (noisy)
710#ifdef __sparc__
711 printk(KERN_INFO "%s: 100%% native mode on irq %s\n",
712 d->name, __irq_itoa(pciirq));
713#else
714 printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
715 d->name, pciirq);
716#endif
717 }
718
719 /* FIXME: silent failure can happen */
720
721 *index = ata_index;
722 ide_pci_setup_ports(dev, d, pciirq, index);
723out:
724 return ret;
725}
726
727int ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t *d)
728{
729 ata_index_t index_list;
730 int ret;
731
732 ret = do_ide_setup_pci_device(dev, d, &index_list, 1);
733 if (ret < 0)
734 goto out;
735
736 if ((index_list.b.low & 0xf0) != 0xf0)
737 probe_hwif_init_with_fixup(&ide_hwifs[index_list.b.low], d->fixup);
738 if ((index_list.b.high & 0xf0) != 0xf0)
739 probe_hwif_init_with_fixup(&ide_hwifs[index_list.b.high], d->fixup);
740
741 create_proc_ide_interfaces();
742out:
743 return ret;
744}
745
746EXPORT_SYMBOL_GPL(ide_setup_pci_device);
747
748int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
749 ide_pci_device_t *d)
750{
751 struct pci_dev *pdev[] = { dev1, dev2 };
752 ata_index_t index_list[2];
753 int ret, i;
754
755 for (i = 0; i < 2; i++) {
756 ret = do_ide_setup_pci_device(pdev[i], d, index_list + i, !i);
757 /*
758 * FIXME: Mom, mom, they stole me the helper function to undo
759 * do_ide_setup_pci_device() on the first device!
760 */
761 if (ret < 0)
762 goto out;
763 }
764
765 for (i = 0; i < 2; i++) {
766 u8 idx[2] = { index_list[i].b.low, index_list[i].b.high };
767 int j;
768
769 for (j = 0; j < 2; j++) {
770 if ((idx[j] & 0xf0) != 0xf0)
771 probe_hwif_init(ide_hwifs + idx[j]);
772 }
773 }
774
775 create_proc_ide_interfaces();
776out:
777 return ret;
778}
779
780EXPORT_SYMBOL_GPL(ide_setup_pci_devices);
781
782/*
783 * Module interfaces
784 */
785
786static int pre_init = 1; /* Before first ordered IDE scan */
787static LIST_HEAD(ide_pci_drivers);
788
789/*
Laurent riffard863b18f2005-10-27 23:12:54 +0200790 * __ide_register_pci_driver - attach IDE driver
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 * @driver: pci driver
Laurent riffard863b18f2005-10-27 23:12:54 +0200792 * @module: owner module of the driver
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 *
794 * Registers a driver with the IDE layer. The IDE layer arranges that
795 * boot time setup is done in the expected device order and then
796 * hands the controllers off to the core PCI code to do the rest of
797 * the work.
798 *
799 * The driver_data of the driver table must point to an ide_pci_device_t
800 * describing the interface.
801 *
802 * Returns are the same as for pci_register_driver
803 */
804
Laurent riffard863b18f2005-10-27 23:12:54 +0200805int __ide_pci_register_driver(struct pci_driver *driver, struct module *module)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806{
807 if(!pre_init)
Laurent riffard863b18f2005-10-27 23:12:54 +0200808 return __pci_register_driver(driver, module);
809 driver->driver.owner = module;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 list_add_tail(&driver->node, &ide_pci_drivers);
811 return 0;
812}
813
Laurent riffard863b18f2005-10-27 23:12:54 +0200814EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816/**
817 * ide_unregister_pci_driver - unregister an IDE driver
818 * @driver: driver to remove
819 *
820 * Unregister a currently installed IDE driver. Returns are the same
821 * as for pci_unregister_driver
822 */
823
824void ide_pci_unregister_driver(struct pci_driver *driver)
825{
826 if(!pre_init)
827 pci_unregister_driver(driver);
828 else
829 list_del(&driver->node);
830}
831
832EXPORT_SYMBOL_GPL(ide_pci_unregister_driver);
833
834/**
835 * ide_scan_pcidev - find an IDE driver for a device
836 * @dev: PCI device to check
837 *
838 * Look for an IDE driver to handle the device we are considering.
839 * This is only used during boot up to get the ordering correct. After
840 * boot up the pci layer takes over the job.
841 */
842
843static int __init ide_scan_pcidev(struct pci_dev *dev)
844{
845 struct list_head *l;
846 struct pci_driver *d;
847
848 list_for_each(l, &ide_pci_drivers)
849 {
850 d = list_entry(l, struct pci_driver, node);
851 if(d->id_table)
852 {
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700853 const struct pci_device_id *id = pci_match_id(d->id_table, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 if(id != NULL)
855 {
856 if(d->probe(dev, id) >= 0)
857 {
858 dev->driver = d;
859 return 1;
860 }
861 }
862 }
863 }
864 return 0;
865}
866
867/**
868 * ide_scan_pcibus - perform the initial IDE driver scan
869 * @scan_direction: set for reverse order scanning
870 *
871 * Perform the initial bus rather than driver ordered scan of the
872 * PCI drivers. After this all IDE pci handling becomes standard
873 * module ordering not traditionally ordered.
874 */
875
876void __init ide_scan_pcibus (int scan_direction)
877{
878 struct pci_dev *dev = NULL;
879 struct pci_driver *d;
880 struct list_head *l, *n;
881
882 pre_init = 0;
883 if (!scan_direction) {
884 while ((dev = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
885 ide_scan_pcidev(dev);
886 }
887 } else {
888 while ((dev = pci_find_device_reverse(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
889 ide_scan_pcidev(dev);
890 }
891 }
892
893 /*
894 * Hand the drivers over to the PCI layer now we
895 * are post init.
896 */
897
898 list_for_each_safe(l, n, &ide_pci_drivers)
899 {
900 list_del(l);
901 d = list_entry(l, struct pci_driver, node);
Laurent riffard863b18f2005-10-27 23:12:54 +0200902 __pci_register_driver(d, d->driver.owner);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 }
904}