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 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/kernel.h>
13 #include <linux/pci.h>
14 #include <linux/init.h>
15 #include <linux/timer.h>
17 #include <linux/interrupt.h>
18 #include <linux/ide.h>
19 #include <linux/dma-mapping.h>
26 * ide_match_hwif - match a PCI IDE against an ide_hwif
27 * @io_base: I/O base of device
28 * @bootable: set if its bootable
29 * @name: name of device
31 * Match a PCI IDE port against an entry in ide_hwifs[],
32 * based on io_base port if possible. Return the matching hwif,
33 * or a new hwif. If we find an error (clashing, out of devices, etc)
36 * FIXME: we need to handle mmio matches here too
39 static ide_hwif_t *ide_match_hwif(unsigned long io_base, u8 bootable, const char *name)
45 * Look for a hwif with matching io_base specified using
46 * parameters to ide_setup().
48 for (h = 0; h < MAX_HWIFS; ++h) {
50 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
51 if (hwif->chipset == ide_forced)
52 return hwif; /* a perfect match */
56 * Look for a hwif with matching io_base default value.
57 * If chipset is "ide_unknown", then claim that hwif slot.
58 * Otherwise, some other chipset has already claimed it.. :(
60 for (h = 0; h < MAX_HWIFS; ++h) {
62 if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
63 if (hwif->chipset == ide_unknown)
64 return hwif; /* match */
65 printk(KERN_ERR "%s: port 0x%04lx already claimed by %s\n",
66 name, io_base, hwif->name);
67 return NULL; /* already claimed */
71 * Okay, there is no hwif matching our io_base,
72 * so we'll just claim an unassigned slot.
73 * Give preference to claiming other slots before claiming ide0/ide1,
74 * just in case there's another interface yet-to-be-scanned
75 * which uses ports 1f0/170 (the ide0/ide1 defaults).
77 * Unless there is a bootable card that does not use the standard
78 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.
81 for (h = 0; h < MAX_HWIFS; ++h) {
83 if (hwif->chipset == ide_unknown)
84 return hwif; /* pick an unused entry */
87 for (h = 2; h < MAX_HWIFS; ++h) {
89 if (hwif->chipset == ide_unknown)
90 return hwif; /* pick an unused entry */
93 for (h = 0; h < 2 && h < MAX_HWIFS; ++h) {
95 if (hwif->chipset == ide_unknown)
96 return hwif; /* pick an unused entry */
98 printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", name);
103 * ide_setup_pci_baseregs - place a PCI IDE controller native
104 * @dev: PCI device of interface to switch native
105 * @name: Name of interface
107 * We attempt to place the PCI interface into PCI native mode. If
108 * we succeed the BARs are ok and the controller is in PCI mode.
109 * Returns 0 on success or an errno code.
111 * FIXME: if we program the interface and then fail to set the BARS
112 * we don't switch it back to legacy mode. Do we actually care ??
115 static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
120 * Place both IDE interfaces into PCI "native" mode:
122 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
124 if ((progif & 0xa) != 0xa) {
125 printk(KERN_INFO "%s: device not capable of full "
126 "native PCI mode\n", name);
129 printk("%s: placing both ports into native PCI mode\n", name);
130 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
131 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
133 printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
134 "0x%04x, got 0x%04x\n",
135 name, progif|5, progif);
142 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
144 * ide_get_or_set_dma_base - setup BMIBA
146 * @hwif: IDE interface
148 * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
149 * Where a device has a partner that is already in DMA mode we check
150 * and enforce IDE simplex rules.
153 static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_hwif_t *hwif)
155 unsigned long dma_base = 0;
156 struct pci_dev *dev = hwif->pci_dev;
159 return hwif->dma_base;
161 if (hwif->mate && hwif->mate->dma_base) {
162 dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
164 u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
166 dma_base = pci_resource_start(dev, baridx);
169 printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
177 if ((d->host_flags & IDE_HFLAG_CS5520) == 0) {
180 switch(dev->device) {
181 case PCI_DEVICE_ID_AL_M5219:
182 case PCI_DEVICE_ID_AL_M5229:
183 case PCI_DEVICE_ID_AMD_VIPER_7409:
184 case PCI_DEVICE_ID_CMD_643:
185 case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
186 case PCI_DEVICE_ID_REVOLUTION:
187 simplex_stat = inb(dma_base + 2);
188 outb(simplex_stat & 0x60, dma_base + 2);
189 simplex_stat = inb(dma_base + 2);
190 if (simplex_stat & 0x80) {
191 printk(KERN_INFO "%s: simplex device: "
198 * If the device claims "simplex" DMA,
199 * this means only one of the two interfaces
200 * can be trusted with DMA at any point in time.
201 * So we should enable DMA only on one of the
204 simplex_stat = hwif->INB(dma_base + 2);
205 if (simplex_stat & 0x80) {
206 /* simplex device? */
208 * At this point we haven't probed the drives so we can't make the
209 * appropriate decision. Really we should defer this problem
210 * until we tune the drive then try to grab DMA ownership if we want
211 * to be the DMA end. This has to be become dynamic to handle hot
214 if (hwif->mate && hwif->mate->dma_base) {
215 printk(KERN_INFO "%s: simplex device: "
225 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
227 void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
229 printk(KERN_INFO "%s: IDE controller (0x%04x:0x%04x rev 0x%02x) at "
230 " PCI slot %s\n", d->name, dev->vendor, dev->device,
231 dev->revision, pci_name(dev));
234 EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
238 * ide_pci_enable - do PCI enables
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.
245 * Returns zero on success or an error code
248 static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
252 if (pci_enable_device(dev)) {
253 ret = pci_enable_device_bars(dev, 1 << 4);
255 printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
256 "Could not enable device.\n", d->name);
259 printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
263 * assume all devices can do 32-bit DMA for now, we can add
264 * a DMA mask field to the struct ide_port_info if we need it
265 * (or let lower level driver set the DMA mask)
267 ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
269 printk(KERN_ERR "%s: can't set dma mask\n", d->name);
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");
279 pci_release_region(dev, 4);
285 * ide_pci_configure - configure an unconfigured device
289 * Enable and configure the PCI device we have been passed.
290 * Returns zero on success or an error code.
293 static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
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.
303 if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO))
305 printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
308 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
309 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
312 if (!(pcicmd & PCI_COMMAND_IO)) {
313 printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
320 * ide_pci_check_iomem - check a register is I/O
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
329 static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d, int bar)
331 ulong flags = pci_resource_flags(dev, bar);
334 if (!flags || pci_resource_len(dev, bar) == 0)
338 if(flags & PCI_BASE_ADDRESS_IO_MASK)
342 printk(KERN_ERR "%s: IO baseregs (BIOS) are reported "
344 "<andre@linux-ide.org>.\n", d->name);
349 * ide_hwif_configure - configure an IDE interface
350 * @dev: PCI device holding interface
352 * @mate: Paired interface if any
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.
358 * Returns the new hardware interface structure, or NULL on a failure
361 static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *mate, int port, int irq)
363 unsigned long ctl = 0, base = 0;
365 u8 bootable = (d->host_flags & IDE_HFLAG_BOOTABLE) ? 1 : 0;
369 if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
370 /* Possibly we should fail if these checks report true */
371 ide_pci_check_iomem(dev, d, 2*port);
372 ide_pci_check_iomem(dev, d, 2*port+1);
374 ctl = pci_resource_start(dev, 2*port+1);
375 base = pci_resource_start(dev, 2*port);
376 if ((ctl && !base) || (base && !ctl)) {
377 printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
378 "for port %d, skipping\n", d->name, port);
384 /* Use default values */
385 ctl = port ? 0x374 : 0x3f4;
386 base = port ? 0x170 : 0x1f0;
388 if ((hwif = ide_match_hwif(base, bootable, d->name)) == NULL)
389 return NULL; /* no room in ide_hwifs[] */
391 memset(&hw, 0, sizeof(hw));
392 hw.irq = hwif->irq ? hwif->irq : irq;
394 hw.chipset = d->chipset ? d->chipset : ide_pci;
395 ide_std_init_ports(&hw, base, ctl | 2);
397 if (hwif->io_ports[IDE_DATA_OFFSET] == base &&
398 hwif->io_ports[IDE_CONTROL_OFFSET] == (ctl | 2))
399 oldnoprobe = hwif->noprobe;
401 ide_init_port_hw(hwif, &hw);
403 hwif->noprobe = oldnoprobe;
407 hwif->channel = port;
417 * ide_hwif_setup_dma - configure DMA interface
420 * @hwif: IDE interface
422 * Set up the DMA base for the interface. Enable the master bits as
423 * necessary and attempt to bring the device DMA into a ready to use
427 static void ide_hwif_setup_dma(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *hwif)
429 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
432 pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
434 if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
435 ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
436 (dev->class & 0x80))) {
437 unsigned long dma_base = ide_get_or_set_dma_base(d, hwif);
438 if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
440 * Set up BM-DMA capability
441 * (PnP BIOS should have done this)
444 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
445 printk(KERN_ERR "%s: %s error updating PCICMD\n",
446 hwif->name, d->name);
452 d->init_dma(hwif, dma_base);
454 ide_setup_dma(hwif, dma_base);
457 printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
458 "(BIOS)\n", hwif->name, d->name);
461 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/
465 * ide_setup_pci_controller - set up IDE PCI
468 * @noisy: verbose flag
469 * @config: returned as 1 if we configured the hardware
471 * Set up the PCI and controller side of the IDE interface. This brings
472 * up the PCI side of the device, checks that the device is enabled
473 * and enables it if need be
476 static int ide_setup_pci_controller(struct pci_dev *dev, const struct ide_port_info *d, int noisy, int *config)
482 ide_setup_pci_noise(dev, d);
484 ret = ide_pci_enable(dev, d);
488 ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
490 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
493 if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */
494 ret = ide_pci_configure(dev, d);
498 printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
506 * ide_pci_setup_ports - configure ports/devices on PCI IDE
510 * @idx: ATA index table to update
512 * Scan the interfaces attached to this device and do any
513 * necessary per port setup. Attach the devices and ask the
514 * generic DMA layer to do its work for us.
516 * Normally called automaticall from do_ide_pci_setup_device,
517 * but is also used directly as a helper function by some controllers
518 * where the chipset setup is not the default PCI IDE one.
521 void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int pciirq, u8 *idx)
523 int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
524 ide_hwif_t *hwif, *mate = NULL;
528 * Set up the IDE ports
531 for (port = 0; port < channels; ++port) {
532 const ide_pci_enablebit_t *e = &(d->enablebits[port]);
534 if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
535 (tmp & e->mask) != e->val)) {
536 printk(KERN_INFO "%s: IDE port disabled\n", d->name);
537 continue; /* port not enabled */
540 if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
543 *(idx + port) = hwif->index;
548 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
549 ide_hwif_setup_dma(dev, d, hwif);
551 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
552 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
553 hwif->irq = port ? 15 : 14;
555 hwif->host_flags = d->host_flags;
556 hwif->pio_mask = d->pio_mask;
558 if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
559 hwif->mate->serialized = hwif->serialized = 1;
561 if (d->host_flags & IDE_HFLAG_IO_32BIT) {
562 hwif->drives[0].io_32bit = 1;
563 hwif->drives[1].io_32bit = 1;
566 if (d->host_flags & IDE_HFLAG_UNMASK_IRQS) {
567 hwif->drives[0].unmask = 1;
568 hwif->drives[1].unmask = 1;
571 if (hwif->dma_base) {
572 hwif->swdma_mask = d->swdma_mask;
573 hwif->mwdma_mask = d->mwdma_mask;
574 hwif->ultra_mask = d->udma_mask;
577 hwif->drives[0].autotune = 1;
578 hwif->drives[1].autotune = 1;
580 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
584 /* Call chipset-specific routine
585 * for each enabled hwif
593 EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
596 * ide_setup_pci_device() looks at the primary/secondary interfaces
597 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
598 * for use with them. This generic code works for most PCI chipsets.
600 * One thing that is not standardized is the location of the
601 * primary/secondary interface "enable/disable" bits. For chipsets that
602 * we "know" about, this information is in the struct ide_port_info;
603 * for all other chipsets, we just assume both interfaces are enabled.
605 static int do_ide_setup_pci_device(struct pci_dev *dev,
606 const struct ide_port_info *d,
609 int tried_config = 0;
612 ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
617 * Can we trust the reported IRQ?
621 /* Is it an "IDE storage" device in non-PCI mode? */
622 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
624 printk(KERN_INFO "%s: not 100%% native mode: "
625 "will probe irqs later\n", d->name);
627 * This allows offboard ide-pci cards the enable a BIOS,
628 * verify interrupt settings of split-mirror pci-config
629 * space, place chipset into init-mode, and/or preserve
630 * an interrupt if the card is not native ide support.
632 ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
636 } else if (tried_config) {
638 printk(KERN_INFO "%s: will probe irqs later\n", d->name);
640 } else if (!pciirq) {
642 printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
646 if (d->init_chipset) {
647 ret = d->init_chipset(dev, d->name);
652 printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
656 /* FIXME: silent failure can happen */
658 ide_pci_setup_ports(dev, d, pciirq, idx);
663 int ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d)
665 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
668 ret = do_ide_setup_pci_device(dev, d, &idx[0], 1);
676 EXPORT_SYMBOL_GPL(ide_setup_pci_device);
678 int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
679 const struct ide_port_info *d)
681 struct pci_dev *pdev[] = { dev1, dev2 };
683 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
685 for (i = 0; i < 2; i++) {
686 ret = do_ide_setup_pci_device(pdev[i], d, &idx[i*2], !i);
688 * FIXME: Mom, mom, they stole me the helper function to undo
689 * do_ide_setup_pci_device() on the first device!
700 EXPORT_SYMBOL_GPL(ide_setup_pci_devices);