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hpt366: use correct enablebits for HPT36x

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The HPT36x chips finally turned out to have the channel enable bits -- however,
badly implemented.  Make use of them despite it's probably only going to burden
the driver's code -- assuming both channels are always enabled by the HighPoint
BIOS anyway...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Acked-by: Linas Vepstas <linas@austin.ibm.com>
Cc: michal.kepien@poczta.onet.pl
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Sergei Shtylyov 2007-07-03 22:28:35 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 783353b1d3
commit 96dcc08b0c
1 changed files with 15 additions and 5 deletions
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20
drivers/ide/pci/hpt366.c
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@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/hpt366.c Version 1.05 Jun 26, 2007
* linux/drivers/ide/pci/hpt366.c Version 1.06 Jun 27, 2007
*
* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
* Portions Copyright (C) 2001 Sun Microsystems, Inc.
@ -1514,18 +1514,28 @@ static int __devinit init_setup_hpt366(struct pci_dev *dev, ide_pci_device_t *d)
goto init_single;
/*
* HPT36x chips are single channel and
* do not seem to have the channel enable bit...
* HPT36x chips have one channel per function and have
* both channel enable bits located differently and visible
* to both functions -- really stupid design decision... :-(
* Bit 4 is for the primary channel, bit 5 for the secondary.
*/
d->channels = 1;
d->enablebits[0].reg = 0;
d->enablebits[0].mask = d->enablebits[0].val = 0x10;
if ((dev2 = pci_get_slot(dev->bus, dev->devfn + 1)) != NULL) {
u8 pin1 = 0, pin2 = 0;
u8 mcr1 = 0, pin1 = 0, pin2 = 0;
int ret;
pci_set_drvdata(dev2, info[rev]);
/*
* Now we'll have to force both channels enabled if
* at least one of them has been enabled by BIOS...
*/
pci_read_config_byte(dev, 0x50, &mcr1);
if (mcr1 & 0x30)
pci_write_config_byte(dev, 0x50, mcr1 | 0x30);
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin1);
pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin2);
if (pin1 != pin2 && dev->irq == dev2->irq) {