ide: add struct ide_io_ports (take 3)

* Add struct ide_io_ports and use it instead of `unsigned long io_ports[]`
  in ide_hwif_t.

* Rename io_ports[] in hw_regs_t to io_ports_array[].

* Use un-named union for 'unsigned long io_ports_array[]' and 'struct
  ide_io_ports io_ports' in hw_regs_t.

* Remove IDE_*_OFFSET defines.

v2:
* scc_pata.c build fix from Stephen Rothwell.

v3:
* Fix ctl_adrr typo in Sparc-specific part of ns87415.c.
  (Noticed by Andrew Morton)

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

8 files changed, 42 insertions, 45 deletions

diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index 812027ddaaf..aaf38109eae 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -347,12 +347,12 @@ static int __init secondary_port_responding(void)
 
 	spin_lock_irqsave(&cmd640_lock, flags);
 
-	outb_p(0x0a, 0x170 + IDE_SELECT_OFFSET);	/* select drive0 */
+	outb_p(0x0a, 0x176);	/* select drive0 */
 	udelay(100);
-	if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x0a) {
-		outb_p(0x1a, 0x170 + IDE_SELECT_OFFSET); /* select drive1 */
+	if ((inb_p(0x176) & 0x1f) != 0x0a) {
+		outb_p(0x1a, 0x176); /* select drive1 */
 		udelay(100);
-		if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x1a) {
+		if ((inb_p(0x176) & 0x1f) != 0x1a) {
 			spin_unlock_irqrestore(&cmd640_lock, flags);
 			return 0; /* nothing responded */
 		}
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index 8c02961d018..c929dadaaaf 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -760,7 +760,7 @@ static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
 		}
 	} else
 		outb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
-		     hwif->io_ports[IDE_CONTROL_OFFSET]);
+		     hwif->io_ports.ctl_addr);
 }
 
 /*
diff --git a/drivers/ide/pci/ns87415.c b/drivers/ide/pci/ns87415.c
index e1b0c9a9ab9..c13e299077e 100644
--- a/drivers/ide/pci/ns87415.c
+++ b/drivers/ide/pci/ns87415.c
@@ -72,8 +72,8 @@ static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
 	base = pci_resource_start(pdev, port * 2) & ~3;
 	dmabase = pci_resource_start(pdev, 4) & ~3;
 
-	superio_ide_status[port] = base + IDE_STATUS_OFFSET;
-	superio_ide_select[port] = base + IDE_SELECT_OFFSET;
+	superio_ide_status[port] = base + 7;
+	superio_ide_select[port] = base + 6;
 	superio_ide_dma_status[port] = dmabase + (!port ? 2 : 0xa);
 
 	/* Clear error/interrupt, enable dma */
@@ -231,12 +231,12 @@ static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
 		 *      SELECT_DRIVE() properly during first ide_probe_port().
 		 */
 		timeout = 10000;
-		outb(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
+		outb(12, hwif->io_ports.ctl_addr);
 		udelay(10);
-		outb(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
+		outb(8, hwif->io_ports.ctl_addr);
 		do {
 			udelay(50);
-			stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+			stat = hwif->INB(hwif->io_ports.status_addr);
                 	if (stat == 0xff)
                         	break;
         	} while ((stat & BUSY_STAT) && --timeout);
@@ -244,7 +244,7 @@ static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
 	}
 
 	if (!using_inta)
-		hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
+		hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
 	else if (!hwif->irq && hwif->mate && hwif->mate->irq)
 		hwif->irq = hwif->mate->irq;	/* share IRQ with mate */
 
diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 684160d3cc0..6e99080497b 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -279,7 +279,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 
 	spin_lock_irqsave(&opti621_lock, flags);
 
-	reg_base = hwif->io_ports[IDE_DATA_OFFSET];
+	reg_base = hwif->io_ports.data_addr;
 
 	/* allow Register-B */
 	outb(0xc0, reg_base + CNTRL_REG);
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index f80306b3929..ad7cdf9060c 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -334,7 +334,7 @@ static int scc_dma_end(ide_drive_t *drive)
 
 	/* errata A308 workaround: Step5 (check data loss) */
 	/* We don't check non ide_disk because it is limited to UDMA4 */
-	if (!(in_be32((void __iomem *)hwif->io_ports[IDE_ALTSTATUS_OFFSET])
+	if (!(in_be32((void __iomem *)hwif->io_ports.ctl_addr)
 	      & ERR_STAT) &&
 	    drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
 		reg = in_be32((void __iomem *)intsts_port);
@@ -438,7 +438,7 @@ static int scc_dma_test_irq(ide_drive_t *drive)
 	u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014);
 
 	/* SCC errata A252,A308 workaround: Step4 */
-	if ((in_be32((void __iomem *)hwif->io_ports[IDE_ALTSTATUS_OFFSET])
+	if ((in_be32((void __iomem *)hwif->io_ports.ctl_addr)
 	     & ERR_STAT) &&
 	    (int_stat & INTSTS_INTRQ))
 		return 1;
@@ -534,8 +534,8 @@ static int scc_ide_setup_pci_device(struct pci_dev *dev,
 	}
 
 	memset(&hw, 0, sizeof(hw));
-	for (i = IDE_DATA_OFFSET; i <= IDE_CONTROL_OFFSET; i++)
-		hw.io_ports[i] = ports->dma + 0x20 + i * 4;
+	for (i = 0; i <= 8; i++)
+		hw.io_ports_array[i] = ports->dma + 0x20 + i * 4;
 	hw.irq = dev->irq;
 	hw.dev = &dev->dev;
 	hw.chipset = ide_pci;
diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index bfcd2acfede..63e28f4e6d3 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -98,28 +98,28 @@ sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
 	int i;
 
 	/* Registers are word (32 bit) aligned */
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
-		hw->io_ports[i] = reg + i * 4;
+	for (i = 0; i <= 7; i++)
+		hw->io_ports_array[i] = reg + i * 4;
 
 	if (ctrl_port)
-		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
+		hw->io_ports.ctl_addr = ctrl_port;
 
 	if (irq_port)
-		hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
+		hw->io_ports.irq_addr = irq_port;
 }
 
 static void
 sgiioc4_maskproc(ide_drive_t * drive, int mask)
 {
 	writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
-	       (void __iomem *)drive->hwif->io_ports[IDE_CONTROL_OFFSET]);
+	       (void __iomem *)drive->hwif->io_ports.ctl_addr);
 }
 
 static int
 sgiioc4_checkirq(ide_hwif_t * hwif)
 {
 	unsigned long intr_addr =
-		hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4;
+		hwif->io_ports.irq_addr + IOC4_INTR_REG * 4;
 
 	if ((u8)readl((void __iomem *)intr_addr) & 0x03)
 		return 1;
@@ -134,8 +134,8 @@ sgiioc4_clearirq(ide_drive_t * drive)
 {
 	u32 intr_reg;
 	ide_hwif_t *hwif = HWIF(drive);
-	unsigned long other_ir =
-	    hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2);
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	unsigned long other_ir = io_ports->irq_addr + (IOC4_INTR_REG << 2);
 
 	/* Code to check for PCI error conditions */
 	intr_reg = readl((void __iomem *)other_ir);
@@ -147,12 +147,12 @@ sgiioc4_clearirq(ide_drive_t * drive)
 		 * a "clear" status if it got cleared.  If not, then spin
 		 * for a bit trying to clear it.
 		 */
-		u8 stat = sgiioc4_INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+		u8 stat = sgiioc4_INB(io_ports->status_addr);
 		int count = 0;
-		stat = sgiioc4_INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+		stat = sgiioc4_INB(io_ports->status_addr);
 		while ((stat & 0x80) && (count++ < 100)) {
 			udelay(1);
-			stat = sgiioc4_INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+			stat = sgiioc4_INB(io_ports->status_addr);
 		}
 
 		if (intr_reg & 0x02) {
@@ -162,9 +162,9 @@ sgiioc4_clearirq(ide_drive_t * drive)
 			    pci_stat_cmd_reg;
 
 			pci_err_addr_low =
-				readl((void __iomem *)hwif->io_ports[IDE_IRQ_OFFSET]);
+				readl((void __iomem *)io_ports->irq_addr);
 			pci_err_addr_high =
-				readl((void __iomem *)(hwif->io_ports[IDE_IRQ_OFFSET] + 4));
+				readl((void __iomem *)(io_ports->irq_addr + 4));
 			pci_read_config_dword(dev, PCI_COMMAND,
 					      &pci_stat_cmd_reg);
 			printk(KERN_ERR
diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 1fffea3211b..c2040a017f4 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -622,9 +622,10 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	void *addr		= pci_get_drvdata(dev);
 	u8 ch			= hwif->channel;
-	hw_regs_t		hw;
 	unsigned long		base;
 
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+
 	/*
 	 *	Fill in the basic HWIF bits
 	 */
@@ -638,7 +639,7 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 	 *	based I/O
 	 */
 
-	memset(&hw, 0, sizeof(hw_regs_t));
+	memset(io_ports, 0, sizeof(*io_ports));
 
 	base = (unsigned long)addr;
 	if (ch)
@@ -651,17 +652,15 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 	 *	so we can't currently use it sanely since we want to
 	 *	use LBA48 mode.
 	 */	
-	hw.io_ports[IDE_DATA_OFFSET]	= base;
-	hw.io_ports[IDE_ERROR_OFFSET]	= base + 1;
-	hw.io_ports[IDE_NSECTOR_OFFSET]	= base + 2;
-	hw.io_ports[IDE_SECTOR_OFFSET]	= base + 3;
-	hw.io_ports[IDE_LCYL_OFFSET]	= base + 4;
-	hw.io_ports[IDE_HCYL_OFFSET]	= base + 5;
-	hw.io_ports[IDE_SELECT_OFFSET]	= base + 6;
-	hw.io_ports[IDE_STATUS_OFFSET]	= base + 7;
-	hw.io_ports[IDE_CONTROL_OFFSET]	= base + 10;
-
-	hw.io_ports[IDE_IRQ_OFFSET]	= 0;
+	io_ports->data_addr	= base;
+	io_ports->error_addr	= base + 1;
+	io_ports->nsect_addr	= base + 2;
+	io_ports->lbal_addr	= base + 3;
+	io_ports->lbam_addr	= base + 4;
+	io_ports->lbah_addr	= base + 5;
+	io_ports->device_addr	= base + 6;
+	io_ports->status_addr	= base + 7;
+	io_ports->ctl_addr	= base + 10;
 
 	if (pdev_is_sata(dev)) {
 		base = (unsigned long)addr;
@@ -672,8 +671,6 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 		hwif->sata_scr[SATA_CONTROL_OFFSET]	= base + 0x100;
 	}
 
-	memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
-
 	hwif->irq = dev->irq;
 
 	hwif->dma_base = (unsigned long)addr + (ch ? 0x08 : 0x00);
diff --git a/drivers/ide/pci/trm290.c b/drivers/ide/pci/trm290.c
index 15ee38f7ad3..a8a3138682e 100644
--- a/drivers/ide/pci/trm290.c
+++ b/drivers/ide/pci/trm290.c
@@ -298,7 +298,7 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
 		if (old != compat && old_mask == 0xff) {
 			/* leave lower 10 bits untouched */
 			compat += (next_offset += 0x400);
-			hwif->io_ports[IDE_CONTROL_OFFSET] = compat + 2;
+			hwif->io_ports.ctl_addr = compat + 2;
 			outw(compat | 1, hwif->config_data);
 			new = inw(hwif->config_data);
 			printk(KERN_INFO "%s: control basereg workaround: "