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

From: Jeremy Higdon <[e-mail]>

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 <[e-mail]>
Cc: Bartlomiej Zolnierkiewicz <[e-mail]>
Cc: Alan Cox <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/ide/pci/sgiioc4.c

···
 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);
 			}
 		}
 	}
···
 	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;
 }
 
···
 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");