UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

[PATCH] sgiioc4: use mmio ops instead of port io 

From: Jeremy Higdon <jeremy@sgi.com>

This patch fixes a bug in sgiioc4 where it was using the default IDE port
I/O operations instead of MMIO.

The IDE part of the IOC4 chip uses MMIO to map the chip registers.
Unfortunately, the sgiioc4 driver uses the default port IO operations,
which happens to have worked for the past few years.  That's about to
change, however, thus this change from inX/outX to readX/writeX.

Signed-off-by: Jeremy Higdon <jeremy@sgi.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeremy Higdon 2006-05-30 21:27:07 -07:00 committed by Linus Torvalds
parent 8fd66ab852
commit a835fa798d
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/ide/pci/sgiioc4.c
View File

@ -345,17 +345,17 @@ sgiioc4_resetproc(ide_drive_t * drive)
static u8
sgiioc4_INB(unsigned long port)
{
u8 reg = (u8) inb(port);
u8 reg = (u8) readb((void __iomem *) port);
if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */
if (reg & 0x51) { /* Not busy...check for interrupt */
unsigned long other_ir = port - 0x110;
unsigned int intr_reg = (u32) inl(other_ir);
unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
/* Clear the Interrupt, Error bits on the IOC4 */
if (intr_reg & 0x03) {
outl(0x03, other_ir);
intr_reg = (u32) inl(other_ir);
writel(0x03, (void __iomem *) other_ir);
intr_reg = (u32) readl((void __iomem *) other_ir);
}
}
}
@ -606,6 +606,12 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
hwif->ide_dma_host_off = &sgiioc4_ide_dma_host_off;
hwif->ide_dma_lostirq = &sgiioc4_ide_dma_lostirq;
hwif->ide_dma_timeout = &__ide_dma_timeout;
/*
* The IOC4 uses MMIO rather than Port IO.
* It also needs special workarounds for INB.
*/
default_hwif_mmiops(hwif);
hwif->INB = &sgiioc4_INB;
}
@ -743,6 +749,6 @@ ioc4_ide_exit(void)
module_init(ioc4_ide_init);
module_exit(ioc4_ide_exit);
MODULE_AUTHOR("Aniket Malatpure - Silicon Graphics Inc. (SGI)");
MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
MODULE_LICENSE("GPL");