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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
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 */
9
10/*
11 * This module provides support for automatic detection and
12 * configuration of all PCI IDE interfaces present in a system.
13 */
14
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/pci.h>
19#include <linux/init.h>
20#include <linux/timer.h>
21#include <linux/mm.h>
22#include <linux/interrupt.h>
23#include <linux/ide.h>
24#include <linux/dma-mapping.h>
25
26#include <asm/io.h>
27#include <asm/irq.h>
28
29
30/**
31 * ide_match_hwif - match a PCI IDE against an ide_hwif
32 * @io_base: I/O base of device
33 * @bootable: set if its bootable
34 * @name: name of device
35 *
36 * Match a PCI IDE port against an entry in ide_hwifs[],
37 * based on io_base port if possible. Return the matching hwif,
38 * or a new hwif. If we find an error (clashing, out of devices, etc)
39 * return NULL
40 *
41 * FIXME: we need to handle mmio matches here too
42 */
43
44static ide_hwif_t *ide_match_hwif(unsigned long io_base, u8 bootable, const char *name)
45{
46 int h;
47 ide_hwif_t *hwif;
48
49 /*
50 * Look for a hwif with matching io_base specified using
51 * parameters to ide_setup().
52 */
53 for (h = 0; h < MAX_HWIFS; ++h) {
54 hwif = &ide_hwifs[h];
55 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
56 if (hwif->chipset == ide_forced)
57 return hwif; /* a perfect match */
58 }
59 }
60 /*
61 * Look for a hwif with matching io_base default value.
62 * If chipset is "ide_unknown", then claim that hwif slot.
63 * Otherwise, some other chipset has already claimed it.. :(
64 */
65 for (h = 0; h < MAX_HWIFS; ++h) {
66 hwif = &ide_hwifs[h];
67 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
68 if (hwif->chipset == ide_unknown)
69 return hwif; /* match */
70 printk(KERN_ERR "%s: port 0x%04lx already claimed by %s\n",
71 name, io_base, hwif->name);
72 return NULL; /* already claimed */
73 }
74 }
75 /*
76 * Okay, there is no hwif matching our io_base,
77 * so we'll just claim an unassigned slot.
78 * Give preference to claiming other slots before claiming ide0/ide1,
79 * just in case there's another interface yet-to-be-scanned
80 * which uses ports 1f0/170 (the ide0/ide1 defaults).
81 *
82 * Unless there is a bootable card that does not use the standard
83 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
84 */
85 if (bootable) {
86 for (h = 0; h < MAX_HWIFS; ++h) {
87 hwif = &ide_hwifs[h];
88 if (hwif->chipset == ide_unknown)
89 return hwif; /* pick an unused entry */
90 }
91 } else {
92 for (h = 2; h < MAX_HWIFS; ++h) {
93 hwif = ide_hwifs + h;
94 if (hwif->chipset == ide_unknown)
95 return hwif; /* pick an unused entry */
96 }
97 }
Matt Mackall83d7dbc2006-10-03 01:14:16 -070098 for (h = 0; h < 2 && h < MAX_HWIFS; ++h) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 hwif = ide_hwifs + h;
100 if (hwif->chipset == ide_unknown)
101 return hwif; /* pick an unused entry */
102 }
103 printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", name);
104 return NULL;
105}
106
107/**
108 * ide_setup_pci_baseregs - place a PCI IDE controller native
109 * @dev: PCI device of interface to switch native
110 * @name: Name of interface
111 *
112 * We attempt to place the PCI interface into PCI native mode. If
113 * we succeed the BARs are ok and the controller is in PCI mode.
114 * Returns 0 on success or an errno code.
115 *
116 * FIXME: if we program the interface and then fail to set the BARS
117 * we don't switch it back to legacy mode. Do we actually care ??
118 */
119
120static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
121{
122 u8 progif = 0;
123
124 /*
125 * Place both IDE interfaces into PCI "native" mode:
126 */
127 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
128 (progif & 5) != 5) {
129 if ((progif & 0xa) != 0xa) {
130 printk(KERN_INFO "%s: device not capable of full "
131 "native PCI mode\n", name);
132 return -EOPNOTSUPP;
133 }
134 printk("%s: placing both ports into native PCI mode\n", name);
135 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
136 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
137 (progif & 5) != 5) {
138 printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
139 "0x%04x, got 0x%04x\n",
140 name, progif|5, progif);
141 return -EOPNOTSUPP;
142 }
143 }
144 return 0;
145}
146
147#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148/**
149 * ide_get_or_set_dma_base - setup BMIBA
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200150 * @d: IDE pci device data
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 * @hwif: Interface
152 *
Bartlomiej Zolnierkiewiczc58e79d2007-10-16 22:29:56 +0200153 * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
154 * Where a device has a partner that is already in DMA mode we check
155 * and enforce IDE simplex rules.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 */
157
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200158static unsigned long ide_get_or_set_dma_base(ide_pci_device_t *d, ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
160 unsigned long dma_base = 0;
161 struct pci_dev *dev = hwif->pci_dev;
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (hwif->mmio)
164 return hwif->dma_base;
165
166 if (hwif->mate && hwif->mate->dma_base) {
167 dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
168 } else {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200169 u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
170
171 dma_base = pci_resource_start(dev, baridx);
172
173 if (dma_base == 0)
174 printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 }
176
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200177 if ((d->host_flags & IDE_HFLAG_CS5520) == 0 && dma_base) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 u8 simplex_stat = 0;
179 dma_base += hwif->channel ? 8 : 0;
180
181 switch(dev->device) {
182 case PCI_DEVICE_ID_AL_M5219:
183 case PCI_DEVICE_ID_AL_M5229:
184 case PCI_DEVICE_ID_AMD_VIPER_7409:
185 case PCI_DEVICE_ID_CMD_643:
186 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
Matt Gillette2f09a7f2005-08-18 22:27:07 +0200187 case PCI_DEVICE_ID_REVOLUTION:
Bartlomiej Zolnierkiewicz31e8a462007-10-19 00:30:08 +0200188 simplex_stat = inb(dma_base + 2);
189 outb(simplex_stat & 0x60, dma_base + 2);
190 simplex_stat = inb(dma_base + 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 if (simplex_stat & 0x80) {
192 printk(KERN_INFO "%s: simplex device: "
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200193 "DMA forced\n",
194 d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 }
196 break;
197 default:
198 /*
199 * If the device claims "simplex" DMA,
200 * this means only one of the two interfaces
201 * can be trusted with DMA at any point in time.
202 * So we should enable DMA only on one of the
203 * two interfaces.
204 */
205 simplex_stat = hwif->INB(dma_base + 2);
206 if (simplex_stat & 0x80) {
207 /* simplex device? */
208/*
209 * At this point we haven't probed the drives so we can't make the
210 * appropriate decision. Really we should defer this problem
211 * until we tune the drive then try to grab DMA ownership if we want
212 * to be the DMA end. This has to be become dynamic to handle hot
213 * plug.
214 */
215 if (hwif->mate && hwif->mate->dma_base) {
216 printk(KERN_INFO "%s: simplex device: "
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200217 "DMA disabled\n",
218 d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 dma_base = 0;
220 }
221 }
222 }
223 }
224 return dma_base;
225}
226#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
227
228void ide_setup_pci_noise (struct pci_dev *dev, ide_pci_device_t *d)
229{
230 printk(KERN_INFO "%s: IDE controller at PCI slot %s\n",
231 d->name, pci_name(dev));
232}
233
234EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
235
236
237/**
238 * ide_pci_enable - do PCI enables
239 * @dev: PCI device
240 * @d: IDE pci device data
241 *
242 * Enable the IDE PCI device. We attempt to enable the device in full
243 * but if that fails then we only need BAR4 so we will enable that.
244 *
245 * Returns zero on success or an error code
246 */
247
248static int ide_pci_enable(struct pci_dev *dev, ide_pci_device_t *d)
249{
250 int ret;
251
252 if (pci_enable_device(dev)) {
253 ret = pci_enable_device_bars(dev, 1 << 4);
254 if (ret < 0) {
255 printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
256 "Could not enable device.\n", d->name);
257 goto out;
258 }
259 printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
260 }
261
262 /*
263 * assume all devices can do 32-bit dma for now. we can add a
264 * dma mask field to the ide_pci_device_t if we need it (or let
265 * lower level driver set the dma mask)
266 */
267 ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
268 if (ret < 0) {
269 printk(KERN_ERR "%s: can't set dma mask\n", d->name);
270 goto out;
271 }
272
273 /* FIXME: Temporary - until we put in the hotplug interface logic
274 Check that the bits we want are not in use by someone else. */
275 ret = pci_request_region(dev, 4, "ide_tmp");
276 if (ret < 0)
277 goto out;
278
279 pci_release_region(dev, 4);
280out:
281 return ret;
282}
283
284/**
285 * ide_pci_configure - configure an unconfigured device
286 * @dev: PCI device
287 * @d: IDE pci device data
288 *
289 * Enable and configure the PCI device we have been passed.
290 * Returns zero on success or an error code.
291 */
292
293static int ide_pci_configure(struct pci_dev *dev, ide_pci_device_t *d)
294{
295 u16 pcicmd = 0;
296 /*
297 * PnP BIOS was *supposed* to have setup this device, but we
298 * can do it ourselves, so long as the BIOS has assigned an IRQ
299 * (or possibly the device is using a "legacy header" for IRQs).
300 * Maybe the user deliberately *disabled* the device,
301 * but we'll eventually ignore it again if no drives respond.
302 */
303 if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO))
304 {
305 printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
306 return -ENODEV;
307 }
308 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
309 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
310 return -EIO;
311 }
312 if (!(pcicmd & PCI_COMMAND_IO)) {
313 printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
314 return -ENXIO;
315 }
316 return 0;
317}
318
319/**
320 * ide_pci_check_iomem - check a register is I/O
321 * @dev: pci device
322 * @d: ide_pci_device
323 * @bar: bar number
324 *
325 * Checks if a BAR is configured and points to MMIO space. If so
326 * print an error and return an error code. Otherwise return 0
327 */
328
329static int ide_pci_check_iomem(struct pci_dev *dev, ide_pci_device_t *d, int bar)
330{
331 ulong flags = pci_resource_flags(dev, bar);
332
333 /* Unconfigured ? */
334 if (!flags || pci_resource_len(dev, bar) == 0)
335 return 0;
336
337 /* I/O space */
338 if(flags & PCI_BASE_ADDRESS_IO_MASK)
339 return 0;
340
341 /* Bad */
342 printk(KERN_ERR "%s: IO baseregs (BIOS) are reported "
343 "as MEM, report to "
344 "<andre@linux-ide.org>.\n", d->name);
345 return -EINVAL;
346}
347
348/**
349 * ide_hwif_configure - configure an IDE interface
350 * @dev: PCI device holding interface
351 * @d: IDE pci data
352 * @mate: Paired interface if any
353 *
354 * Perform the initial set up for the hardware interface structure. This
355 * is done per interface port rather than per PCI device. There may be
356 * more than one port per device.
357 *
358 * Returns the new hardware interface structure, or NULL on a failure
359 */
360
361static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *mate, int port, int irq)
362{
363 unsigned long ctl = 0, base = 0;
364 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz7cab14a2007-10-19 00:30:06 +0200365 u8 bootable = (d->host_flags & IDE_HFLAG_BOOTABLE) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200367 if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 /* Possibly we should fail if these checks report true */
369 ide_pci_check_iomem(dev, d, 2*port);
370 ide_pci_check_iomem(dev, d, 2*port+1);
371
372 ctl = pci_resource_start(dev, 2*port+1);
373 base = pci_resource_start(dev, 2*port);
374 if ((ctl && !base) || (base && !ctl)) {
375 printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
376 "for port %d, skipping\n", d->name, port);
377 return NULL;
378 }
379 }
380 if (!ctl)
381 {
382 /* Use default values */
383 ctl = port ? 0x374 : 0x3f4;
384 base = port ? 0x170 : 0x1f0;
385 }
Bartlomiej Zolnierkiewicz7cab14a2007-10-19 00:30:06 +0200386 if ((hwif = ide_match_hwif(base, bootable, d->name)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return NULL; /* no room in ide_hwifs[] */
388 if (hwif->io_ports[IDE_DATA_OFFSET] != base ||
389 hwif->io_ports[IDE_CONTROL_OFFSET] != (ctl | 2)) {
390 memset(&hwif->hw, 0, sizeof(hwif->hw));
391#ifndef IDE_ARCH_OBSOLETE_INIT
392 ide_std_init_ports(&hwif->hw, base, (ctl | 2));
393 hwif->hw.io_ports[IDE_IRQ_OFFSET] = 0;
394#else
395 ide_init_hwif_ports(&hwif->hw, base, (ctl | 2), NULL);
396#endif
397 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
398 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
399 }
400 hwif->chipset = ide_pci;
401 hwif->pci_dev = dev;
402 hwif->cds = (struct ide_pci_device_s *) d;
403 hwif->channel = port;
404
405 if (!hwif->irq)
406 hwif->irq = irq;
407 if (mate) {
408 hwif->mate = mate;
409 mate->mate = hwif;
410 }
411 return hwif;
412}
413
414/**
415 * ide_hwif_setup_dma - configure DMA interface
416 * @dev: PCI device
417 * @d: IDE pci data
418 * @hwif: Hardware interface we are configuring
419 *
420 * Set up the DMA base for the interface. Enable the master bits as
421 * necessary and attempt to bring the device DMA into a ready to use
422 * state
423 */
424
425#ifndef CONFIG_BLK_DEV_IDEDMA_PCI
426static void ide_hwif_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif)
427{
428}
429#else
430static void ide_hwif_setup_dma(struct pci_dev *dev, ide_pci_device_t *d, ide_hwif_t *hwif)
431{
432 u16 pcicmd;
Bartlomiej Zolnierkiewicz47b68782007-10-19 00:30:06 +0200433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
435
Bartlomiej Zolnierkiewicz47b68782007-10-19 00:30:06 +0200436 if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
438 (dev->class & 0x80))) {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200439 unsigned long dma_base = ide_get_or_set_dma_base(d, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
441 /*
442 * Set up BM-DMA capability
443 * (PnP BIOS should have done this)
444 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 pci_set_master(dev);
446 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
447 printk(KERN_ERR "%s: %s error updating PCICMD\n",
448 hwif->name, d->name);
449 dma_base = 0;
450 }
451 }
452 if (dma_base) {
453 if (d->init_dma) {
454 d->init_dma(hwif, dma_base);
455 } else {
456 ide_setup_dma(hwif, dma_base, 8);
457 }
458 } else {
459 printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
460 "(BIOS)\n", hwif->name, d->name);
461 }
462 }
463}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464#endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/
465
466/**
467 * ide_setup_pci_controller - set up IDE PCI
468 * @dev: PCI device
469 * @d: IDE PCI data
470 * @noisy: verbose flag
471 * @config: returned as 1 if we configured the hardware
472 *
473 * Set up the PCI and controller side of the IDE interface. This brings
474 * up the PCI side of the device, checks that the device is enabled
475 * and enables it if need be
476 */
477
478static int ide_setup_pci_controller(struct pci_dev *dev, ide_pci_device_t *d, int noisy, int *config)
479{
480 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 u16 pcicmd;
482
483 if (noisy)
484 ide_setup_pci_noise(dev, d);
485
486 ret = ide_pci_enable(dev, d);
487 if (ret < 0)
488 goto out;
489
490 ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
491 if (ret < 0) {
492 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
493 goto out;
494 }
495 if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */
496 ret = ide_pci_configure(dev, d);
497 if (ret < 0)
498 goto out;
499 *config = 1;
500 printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
501 }
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 if (noisy)
Bartlomiej Zolnierkiewiczfc212bb2007-10-19 00:30:08 +0200504 printk(KERN_INFO "%s: chipset revision %d\n",
505 d->name, dev->revision);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506out:
507 return ret;
508}
509
510/**
511 * ide_pci_setup_ports - configure ports/devices on PCI IDE
512 * @dev: PCI device
513 * @d: IDE pci device info
514 * @pciirq: IRQ line
515 * @index: ata index to update
516 *
517 * Scan the interfaces attached to this device and do any
518 * necessary per port setup. Attach the devices and ask the
519 * generic DMA layer to do its work for us.
520 *
521 * Normally called automaticall from do_ide_pci_setup_device,
522 * but is also used directly as a helper function by some controllers
523 * where the chipset setup is not the default PCI IDE one.
524 */
525
526void ide_pci_setup_ports(struct pci_dev *dev, ide_pci_device_t *d, int pciirq, ata_index_t *index)
527{
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200528 int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 int at_least_one_hwif_enabled = 0;
530 ide_hwif_t *hwif, *mate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 u8 tmp;
532
533 index->all = 0xf0f0;
534
535 /*
536 * Set up the IDE ports
537 */
538
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200539 for (port = 0; port < channels; ++port) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 ide_pci_enablebit_t *e = &(d->enablebits[port]);
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
543 (tmp & e->mask) != e->val))
544 continue; /* port not enabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
547 continue;
548
549 /* setup proper ancestral information */
550 hwif->gendev.parent = &dev->dev;
551
552 if (hwif->channel) {
553 index->b.high = hwif->index;
554 } else {
555 index->b.low = hwif->index;
556 }
557
558
559 if (d->init_iops)
560 d->init_iops(hwif);
561
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200562 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 ide_hwif_setup_dma(dev, d, hwif);
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200564
Bartlomiej Zolnierkiewicz6a824c92007-07-20 01:11:58 +0200565 hwif->host_flags = d->host_flags;
Bartlomiej Zolnierkiewicz4099d142007-07-20 01:11:59 +0200566 hwif->pio_mask = d->pio_mask;
Bartlomiej Zolnierkiewicz6a824c92007-07-20 01:11:58 +0200567
Bartlomiej Zolnierkiewicz5f8b6c32007-10-19 00:30:07 +0200568 if (hwif->dma_base) {
569 hwif->swdma_mask = d->swdma_mask;
570 hwif->mwdma_mask = d->mwdma_mask;
571 hwif->ultra_mask = d->udma_mask;
572 }
573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 if (d->init_hwif)
575 /* Call chipset-specific routine
576 * for each enabled hwif
577 */
578 d->init_hwif(hwif);
579
580 mate = hwif;
581 at_least_one_hwif_enabled = 1;
582 }
583 if (!at_least_one_hwif_enabled)
584 printk(KERN_INFO "%s: neither IDE port enabled (BIOS)\n", d->name);
585}
586
587EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
588
589/*
590 * ide_setup_pci_device() looks at the primary/secondary interfaces
591 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
592 * for use with them. This generic code works for most PCI chipsets.
593 *
594 * One thing that is not standardized is the location of the
595 * primary/secondary interface "enable/disable" bits. For chipsets that
596 * we "know" about, this information is in the ide_pci_device_t struct;
597 * for all other chipsets, we just assume both interfaces are enabled.
598 */
599static int do_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t *d,
600 ata_index_t *index, u8 noisy)
601{
602 static ata_index_t ata_index = { .b = { .low = 0xff, .high = 0xff } };
603 int tried_config = 0;
604 int pciirq, ret;
605
606 ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
607 if (ret < 0)
608 goto out;
609
610 /*
611 * Can we trust the reported IRQ?
612 */
613 pciirq = dev->irq;
614
615 /* Is it an "IDE storage" device in non-PCI mode? */
616 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
617 if (noisy)
618 printk(KERN_INFO "%s: not 100%% native mode: "
619 "will probe irqs later\n", d->name);
620 /*
621 * This allows offboard ide-pci cards the enable a BIOS,
622 * verify interrupt settings of split-mirror pci-config
623 * space, place chipset into init-mode, and/or preserve
624 * an interrupt if the card is not native ide support.
625 */
626 ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
627 if (ret < 0)
628 goto out;
629 pciirq = ret;
630 } else if (tried_config) {
631 if (noisy)
632 printk(KERN_INFO "%s: will probe irqs later\n", d->name);
633 pciirq = 0;
634 } else if (!pciirq) {
635 if (noisy)
636 printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
637 d->name, pciirq);
638 pciirq = 0;
639 } else {
640 if (d->init_chipset) {
641 ret = d->init_chipset(dev, d->name);
642 if (ret < 0)
643 goto out;
644 }
645 if (noisy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
647 d->name, pciirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 }
649
650 /* FIXME: silent failure can happen */
651
652 *index = ata_index;
653 ide_pci_setup_ports(dev, d, pciirq, index);
654out:
655 return ret;
656}
657
658int ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t *d)
659{
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200660 ide_hwif_t *hwif = NULL, *mate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 ata_index_t index_list;
662 int ret;
663
664 ret = do_ide_setup_pci_device(dev, d, &index_list, 1);
665 if (ret < 0)
666 goto out;
667
668 if ((index_list.b.low & 0xf0) != 0xf0)
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200669 hwif = &ide_hwifs[index_list.b.low];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 if ((index_list.b.high & 0xf0) != 0xf0)
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200671 mate = &ide_hwifs[index_list.b.high];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200673 if (hwif)
674 probe_hwif_init_with_fixup(hwif, d->fixup);
675 if (mate)
676 probe_hwif_init_with_fixup(mate, d->fixup);
677
678 if (hwif)
679 ide_proc_register_port(hwif);
680 if (mate)
681 ide_proc_register_port(mate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682out:
683 return ret;
684}
685
686EXPORT_SYMBOL_GPL(ide_setup_pci_device);
687
688int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
689 ide_pci_device_t *d)
690{
691 struct pci_dev *pdev[] = { dev1, dev2 };
692 ata_index_t index_list[2];
693 int ret, i;
694
695 for (i = 0; i < 2; i++) {
696 ret = do_ide_setup_pci_device(pdev[i], d, index_list + i, !i);
697 /*
698 * FIXME: Mom, mom, they stole me the helper function to undo
699 * do_ide_setup_pci_device() on the first device!
700 */
701 if (ret < 0)
702 goto out;
703 }
704
705 for (i = 0; i < 2; i++) {
706 u8 idx[2] = { index_list[i].b.low, index_list[i].b.high };
707 int j;
708
709 for (j = 0; j < 2; j++) {
710 if ((idx[j] & 0xf0) != 0xf0)
711 probe_hwif_init(ide_hwifs + idx[j]);
712 }
713 }
714
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200715 for (i = 0; i < 2; i++) {
716 u8 idx[2] = { index_list[i].b.low, index_list[i].b.high };
717 int j;
718
719 for (j = 0; j < 2; j++) {
720 if ((idx[j] & 0xf0) != 0xf0)
721 ide_proc_register_port(ide_hwifs + idx[j]);
722 }
723 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724out:
725 return ret;
726}
727
728EXPORT_SYMBOL_GPL(ide_setup_pci_devices);
729
Bartlomiej Zolnierkiewicz6d208b32007-05-10 00:01:11 +0200730#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731/*
732 * Module interfaces
733 */
734
735static int pre_init = 1; /* Before first ordered IDE scan */
736static LIST_HEAD(ide_pci_drivers);
737
738/*
Ralf Baechlec37ea212005-11-18 23:11:24 +0100739 * __ide_pci_register_driver - attach IDE driver
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 * @driver: pci driver
Laurent riffard863b18f2005-10-27 23:12:54 +0200741 * @module: owner module of the driver
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 *
743 * Registers a driver with the IDE layer. The IDE layer arranges that
744 * boot time setup is done in the expected device order and then
745 * hands the controllers off to the core PCI code to do the rest of
746 * the work.
747 *
748 * The driver_data of the driver table must point to an ide_pci_device_t
749 * describing the interface.
750 *
751 * Returns are the same as for pci_register_driver
752 */
753
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800754int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
755 const char *mod_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756{
757 if(!pre_init)
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -0800758 return __pci_register_driver(driver, module, mod_name);
Laurent riffard863b18f2005-10-27 23:12:54 +0200759 driver->driver.owner = module;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 list_add_tail(&driver->node, &ide_pci_drivers);
761 return 0;
762}
763
Laurent riffard863b18f2005-10-27 23:12:54 +0200764EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765
766/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 * ide_scan_pcidev - find an IDE driver for a device
768 * @dev: PCI device to check
769 *
770 * Look for an IDE driver to handle the device we are considering.
771 * This is only used during boot up to get the ordering correct. After
772 * boot up the pci layer takes over the job.
773 */
774
775static int __init ide_scan_pcidev(struct pci_dev *dev)
776{
777 struct list_head *l;
778 struct pci_driver *d;
779
Sergei Shtylyov0505b552007-09-11 22:28:34 +0200780 list_for_each(l, &ide_pci_drivers) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 d = list_entry(l, struct pci_driver, node);
Sergei Shtylyov0505b552007-09-11 22:28:34 +0200782 if (d->id_table) {
783 const struct pci_device_id *id = pci_match_id(d->id_table,
784 dev);
785 if (id != NULL && d->probe(dev, id) >= 0) {
786 dev->driver = d;
787 pci_dev_get(dev);
788 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 }
790 }
791 }
792 return 0;
793}
794
795/**
796 * ide_scan_pcibus - perform the initial IDE driver scan
797 * @scan_direction: set for reverse order scanning
798 *
799 * Perform the initial bus rather than driver ordered scan of the
800 * PCI drivers. After this all IDE pci handling becomes standard
801 * module ordering not traditionally ordered.
802 */
803
804void __init ide_scan_pcibus (int scan_direction)
805{
806 struct pci_dev *dev = NULL;
807 struct pci_driver *d;
808 struct list_head *l, *n;
809
810 pre_init = 0;
Sergei Shtylyov0505b552007-09-11 22:28:34 +0200811 if (!scan_direction)
812 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 ide_scan_pcidev(dev);
Sergei Shtylyov0505b552007-09-11 22:28:34 +0200814 else
815 while ((dev = pci_get_device_reverse(PCI_ANY_ID, PCI_ANY_ID, dev))
816 != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 ide_scan_pcidev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
819 /*
820 * Hand the drivers over to the PCI layer now we
821 * are post init.
822 */
823
Andrew Mortond61bcce2007-07-03 22:28:36 +0200824 list_for_each_safe(l, n, &ide_pci_drivers) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 list_del(l);
826 d = list_entry(l, struct pci_driver, node);
Sergei Shtylyov0505b552007-09-11 22:28:34 +0200827 if (__pci_register_driver(d, d->driver.owner, d->driver.mod_name))
828 printk(KERN_ERR "%s: failed to register driver for %s\n",
829 __FUNCTION__, d->driver.mod_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 }
831}
Bartlomiej Zolnierkiewicz6d208b32007-05-10 00:01:11 +0200832#endif