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
);