Merge commit 'v2.6.28-rc1' into sched/urgent

1 files changed, 664 insertions, 0 deletions

diff --git a/drivers/ide/sgiioc4.c b/drivers/ide/sgiioc4.c
new file mode 100644
index 00000000000..7defa0ae201
--- /dev/null
+++ b/drivers/ide/sgiioc4.c
@@ -0,0 +1,664 @@
+/*
+ * Copyright (c) 2003-2006 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (C) 2008 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/NoticeExplan
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/scatterlist.h>
+#include <linux/ioc4.h>
+#include <asm/io.h>
+
+#include <linux/ide.h>
+
+#define DRV_NAME "SGIIOC4"
+
+/* IOC4 Specific Definitions */
+#define IOC4_CMD_OFFSET		0x100
+#define IOC4_CTRL_OFFSET	0x120
+#define IOC4_DMA_OFFSET		0x140
+#define IOC4_INTR_OFFSET	0x0
+
+#define IOC4_TIMING		0x00
+#define IOC4_DMA_PTR_L		0x01
+#define IOC4_DMA_PTR_H		0x02
+#define IOC4_DMA_ADDR_L		0x03
+#define IOC4_DMA_ADDR_H		0x04
+#define IOC4_BC_DEV		0x05
+#define IOC4_BC_MEM		0x06
+#define	IOC4_DMA_CTRL		0x07
+#define	IOC4_DMA_END_ADDR	0x08
+
+/* Bits in the IOC4 Control/Status Register */
+#define	IOC4_S_DMA_START	0x01
+#define	IOC4_S_DMA_STOP		0x02
+#define	IOC4_S_DMA_DIR		0x04
+#define	IOC4_S_DMA_ACTIVE	0x08
+#define	IOC4_S_DMA_ERROR	0x10
+#define	IOC4_ATA_MEMERR		0x02
+
+/* Read/Write Directions */
+#define	IOC4_DMA_WRITE		0x04
+#define	IOC4_DMA_READ		0x00
+
+/* Interrupt Register Offsets */
+#define IOC4_INTR_REG		0x03
+#define	IOC4_INTR_SET		0x05
+#define	IOC4_INTR_CLEAR		0x07
+
+#define IOC4_IDE_CACHELINE_SIZE	128
+#define IOC4_CMD_CTL_BLK_SIZE	0x20
+#define IOC4_SUPPORTED_FIRMWARE_REV 46
+
+typedef struct {
+	u32 timing_reg0;
+	u32 timing_reg1;
+	u32 low_mem_ptr;
+	u32 high_mem_ptr;
+	u32 low_mem_addr;
+	u32 high_mem_addr;
+	u32 dev_byte_count;
+	u32 mem_byte_count;
+	u32 status;
+} ioc4_dma_regs_t;
+
+/* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */
+/* IOC4 has only 1 IDE channel */
+#define IOC4_PRD_BYTES       16
+#define IOC4_PRD_ENTRIES     (PAGE_SIZE /(4*IOC4_PRD_BYTES))
+
+
+static void
+sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
+			unsigned long ctrl_port, unsigned long irq_port)
+{
+	unsigned long reg = data_port;
+	int i;
+
+	/* Registers are word (32 bit) aligned */
+	for (i = 0; i <= 7; i++)
+		hw->io_ports_array[i] = reg + i * 4;
+
+	hw->io_ports.ctl_addr = ctrl_port;
+	hw->io_ports.irq_addr = irq_port;
+}
+
+static int
+sgiioc4_checkirq(ide_hwif_t * hwif)
+{
+	unsigned long intr_addr =
+		hwif->io_ports.irq_addr + IOC4_INTR_REG * 4;
+
+	if ((u8)readl((void __iomem *)intr_addr) & 0x03)
+		return 1;
+
+	return 0;
+}
+
+static u8 sgiioc4_read_status(ide_hwif_t *);
+
+static int
+sgiioc4_clearirq(ide_drive_t * drive)
+{
+	u32 intr_reg;
+	ide_hwif_t *hwif = HWIF(drive);
+	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);
+	if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */
+		/*
+		 * Using sgiioc4_read_status to read the Status register has a
+		 * side effect of clearing the interrupt.  The first read should
+		 * clear it if it is set.  The second read should return
+		 * a "clear" status if it got cleared.  If not, then spin
+		 * for a bit trying to clear it.
+		 */
+		u8 stat = sgiioc4_read_status(hwif);
+		int count = 0;
+
+		stat = sgiioc4_read_status(hwif);
+		while ((stat & ATA_BUSY) && (count++ < 100)) {
+			udelay(1);
+			stat = sgiioc4_read_status(hwif);
+		}
+
+		if (intr_reg & 0x02) {
+			struct pci_dev *dev = to_pci_dev(hwif->dev);
+			/* Error when transferring DMA data on PCI bus */
+			u32 pci_err_addr_low, pci_err_addr_high,
+			    pci_stat_cmd_reg;
+
+			pci_err_addr_low =
+				readl((void __iomem *)io_ports->irq_addr);
+			pci_err_addr_high =
+				readl((void __iomem *)(io_ports->irq_addr + 4));
+			pci_read_config_dword(dev, PCI_COMMAND,
+					      &pci_stat_cmd_reg);
+			printk(KERN_ERR
+			       "%s(%s) : PCI Bus Error when doing DMA:"
+				   " status-cmd reg is 0x%x\n",
+			       __func__, drive->name, pci_stat_cmd_reg);
+			printk(KERN_ERR
+			       "%s(%s) : PCI Error Address is 0x%x%x\n",
+			       __func__, drive->name,
+			       pci_err_addr_high, pci_err_addr_low);
+			/* Clear the PCI Error indicator */
+			pci_write_config_dword(dev, PCI_COMMAND, 0x00000146);
+		}
+
+		/* Clear the Interrupt, Error bits on the IOC4 */
+		writel(0x03, (void __iomem *)other_ir);
+
+		intr_reg = readl((void __iomem *)other_ir);
+	}
+
+	return intr_reg & 3;
+}
+
+static void sgiioc4_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4;
+	unsigned int reg = readl((void __iomem *)ioc4_dma_addr);
+	unsigned int temp_reg = reg | IOC4_S_DMA_START;
+
+	writel(temp_reg, (void __iomem *)ioc4_dma_addr);
+}
+
+static u32
+sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base)
+{
+	unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
+	u32	ioc4_dma;
+	int	count;
+
+	count = 0;
+	ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
+	while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) {
+		udelay(1);
+		ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
+	}
+	return ioc4_dma;
+}
+
+/* Stops the IOC4 DMA Engine */
+static int sgiioc4_dma_end(ide_drive_t *drive)
+{
+	u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0;
+	ide_hwif_t *hwif = HWIF(drive);
+	unsigned long dma_base = hwif->dma_base;
+	int dma_stat = 0;
+	unsigned long *ending_dma = ide_get_hwifdata(hwif);
+
+	writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4));
+
+	ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
+
+	if (ioc4_dma & IOC4_S_DMA_STOP) {
+		printk(KERN_ERR
+		       "%s(%s): IOC4 DMA STOP bit is still 1 :"
+		       "ioc4_dma_reg 0x%x\n",
+		       __func__, drive->name, ioc4_dma);
+		dma_stat = 1;
+	}
+
+	/*
+	 * The IOC4 will DMA 1's to the ending dma area to indicate that
+	 * previous data DMA is complete.  This is necessary because of relaxed
+	 * ordering between register reads and DMA writes on the Altix.
+	 */
+	while ((cnt++ < 200) && (!valid)) {
+		for (num = 0; num < 16; num++) {
+			if (ending_dma[num]) {
+				valid = 1;
+				break;
+			}
+		}
+		udelay(1);
+	}
+	if (!valid) {
+		printk(KERN_ERR "%s(%s) : DMA incomplete\n", __func__,
+		       drive->name);
+		dma_stat = 1;
+	}
+
+	bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4));
+	bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4));
+
+	if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) {
+		if (bc_dev > bc_mem + 8) {
+			printk(KERN_ERR
+			       "%s(%s): WARNING!! byte_count_dev %d "
+			       "!= byte_count_mem %d\n",
+			       __func__, drive->name, bc_dev, bc_mem);
+		}
+	}
+
+	drive->waiting_for_dma = 0;
+	ide_destroy_dmatable(drive);
+
+	return dma_stat;
+}
+
+static void sgiioc4_set_dma_mode(ide_drive_t *drive, const u8 speed)
+{
+}
+
+/* returns 1 if dma irq issued, 0 otherwise */
+static int sgiioc4_dma_test_irq(ide_drive_t *drive)
+{
+	return sgiioc4_checkirq(HWIF(drive));
+}
+
+static void sgiioc4_dma_host_set(ide_drive_t *drive, int on)
+{
+	if (!on)
+		sgiioc4_clearirq(drive);
+}
+
+static void
+sgiioc4_resetproc(ide_drive_t * drive)
+{
+	sgiioc4_dma_end(drive);
+	sgiioc4_clearirq(drive);
+}
+
+static void
+sgiioc4_dma_lost_irq(ide_drive_t * drive)
+{
+	sgiioc4_resetproc(drive);
+
+	ide_dma_lost_irq(drive);
+}
+
+static u8 sgiioc4_read_status(ide_hwif_t *hwif)
+{
+	unsigned long port = hwif->io_ports.status_addr;
+	u8 reg = (u8) readb((void __iomem *) port);
+
+	if (!(reg & ATA_BUSY)) {	/* Not busy... check for interrupt */
+		unsigned long other_ir = port - 0x110;
+		unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
+
+		/* Clear the Interrupt, Error bits on the IOC4 */
+		if (intr_reg & 0x03) {
+			writel(0x03, (void __iomem *) other_ir);
+			intr_reg = (u32) readl((void __iomem *) other_ir);
+		}
+	}
+
+	return reg;
+}
+
+/* Creates a dma map for the scatter-gather list entries */
+static int __devinit
+ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
+	int num_ports = sizeof (ioc4_dma_regs_t);
+	void *pad;
+
+	printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
+
+	if (request_mem_region(dma_base, num_ports, hwif->name) == NULL) {
+		printk(KERN_ERR "%s(%s) -- ERROR: addresses 0x%08lx to 0x%08lx "
+		       "already in use\n", __func__, hwif->name,
+		       dma_base, dma_base + num_ports - 1);
+		return -1;
+	}
+
+	hwif->dma_base = (unsigned long)hwif->io_ports.irq_addr +
+			 IOC4_DMA_OFFSET;
+
+	hwif->sg_max_nents = IOC4_PRD_ENTRIES;
+
+	hwif->prd_max_nents = IOC4_PRD_ENTRIES;
+	hwif->prd_ent_size = IOC4_PRD_BYTES;
+
+	if (ide_allocate_dma_engine(hwif))
+		goto dma_pci_alloc_failure;
+
+	pad = pci_alloc_consistent(dev, IOC4_IDE_CACHELINE_SIZE,
+				   (dma_addr_t *)&hwif->extra_base);
+	if (pad) {
+		ide_set_hwifdata(hwif, pad);
+		return 0;
+	}
+
+	ide_release_dma_engine(hwif);
+
+	printk(KERN_ERR "%s(%s) -- ERROR: Unable to allocate DMA maps\n",
+	       __func__, hwif->name);
+	printk(KERN_INFO "%s: changing from DMA to PIO mode", hwif->name);
+
+dma_pci_alloc_failure:
+	release_mem_region(dma_base, num_ports);
+
+	return -1;
+}
+
+/* Initializes the IOC4 DMA Engine */
+static void
+sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive)
+{
+	u32 ioc4_dma;
+	ide_hwif_t *hwif = HWIF(drive);
+	unsigned long dma_base = hwif->dma_base;
+	unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
+	u32 dma_addr, ending_dma_addr;
+
+	ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
+
+	if (ioc4_dma & IOC4_S_DMA_ACTIVE) {
+		printk(KERN_WARNING
+			"%s(%s):Warning!! DMA from previous transfer was still active\n",
+		       __func__, drive->name);
+		writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
+		ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
+
+		if (ioc4_dma & IOC4_S_DMA_STOP)
+			printk(KERN_ERR
+			       "%s(%s) : IOC4 Dma STOP bit is still 1\n",
+			       __func__, drive->name);
+	}
+
+	ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
+	if (ioc4_dma & IOC4_S_DMA_ERROR) {
+		printk(KERN_WARNING
+		       "%s(%s) : Warning!! - DMA Error during Previous"
+		       " transfer | status 0x%x\n",
+		       __func__, drive->name, ioc4_dma);
+		writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
+		ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
+
+		if (ioc4_dma & IOC4_S_DMA_STOP)
+			printk(KERN_ERR
+			       "%s(%s) : IOC4 DMA STOP bit is still 1\n",
+			       __func__, drive->name);
+	}
+
+	/* Address of the Scatter Gather List */
+	dma_addr = cpu_to_le32(hwif->dmatable_dma);
+	writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4));
+
+	/* Address of the Ending DMA */
+	memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE);
+	ending_dma_addr = cpu_to_le32(hwif->extra_base);
+	writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4));
+
+	writel(dma_direction, (void __iomem *)ioc4_dma_addr);
+	drive->waiting_for_dma = 1;
+}
+
+/* IOC4 Scatter Gather list Format 					 */
+/* 128 Bit entries to support 64 bit addresses in the future		 */
+/* The Scatter Gather list Entry should be in the BIG-ENDIAN Format	 */
+/* --------------------------------------------------------------------- */
+/* | Upper 32 bits - Zero           |	 	Lower 32 bits- address | */
+/* --------------------------------------------------------------------- */
+/* | Upper 32 bits - Zero	    |EOL| 15 unused     | 16 Bit Length| */
+/* --------------------------------------------------------------------- */
+/* Creates the scatter gather list, DMA Table */
+static unsigned int
+sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	unsigned int *table = hwif->dmatable_cpu;
+	unsigned int count = 0, i = 1;
+	struct scatterlist *sg;
+
+	hwif->sg_nents = i = ide_build_sglist(drive, rq);
+
+	if (!i)
+		return 0;	/* sglist of length Zero */
+
+	sg = hwif->sg_table;
+	while (i && sg_dma_len(sg)) {
+		dma_addr_t cur_addr;
+		int cur_len;
+		cur_addr = sg_dma_address(sg);
+		cur_len = sg_dma_len(sg);
+
+		while (cur_len) {
+			if (count++ >= IOC4_PRD_ENTRIES) {
+				printk(KERN_WARNING
+				       "%s: DMA table too small\n",
+				       drive->name);
+				goto use_pio_instead;
+			} else {
+				u32 bcount =
+				    0x10000 - (cur_addr & 0xffff);
+
+				if (bcount > cur_len)
+					bcount = cur_len;
+
+				/* put the addr, length in
+				 * the IOC4 dma-table format */
+				*table = 0x0;
+				table++;
+				*table = cpu_to_be32(cur_addr);
+				table++;
+				*table = 0x0;
+				table++;
+
+				*table = cpu_to_be32(bcount);
+				table++;
+
+				cur_addr += bcount;
+				cur_len -= bcount;
+			}
+		}
+
+		sg = sg_next(sg);
+		i--;
+	}
+
+	if (count) {
+		table--;
+		*table |= cpu_to_be32(0x80000000);
+		return count;
+	}
+
+use_pio_instead:
+	ide_destroy_dmatable(drive);
+
+	return 0;		/* revert to PIO for this request */
+}
+
+static int sgiioc4_dma_setup(ide_drive_t *drive)
+{
+	struct request *rq = HWGROUP(drive)->rq;
+	unsigned int count = 0;
+	int ddir;
+
+	if (rq_data_dir(rq))
+		ddir = PCI_DMA_TODEVICE;
+	else
+		ddir = PCI_DMA_FROMDEVICE;
+
+	if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) {
+		/* try PIO instead of DMA */
+		ide_map_sg(drive, rq);
+		return 1;
+	}
+
+	if (rq_data_dir(rq))
+		/* Writes TO the IOC4 FROM Main Memory */
+		ddir = IOC4_DMA_READ;
+	else
+		/* Writes FROM the IOC4 TO Main Memory */
+		ddir = IOC4_DMA_WRITE;
+
+	sgiioc4_configure_for_dma(ddir, drive);
+
+	return 0;
+}
+
+static const struct ide_tp_ops sgiioc4_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= sgiioc4_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.read_sff_dma_status	= ide_read_sff_dma_status,
+
+	.set_irq		= ide_set_irq,
+
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_port_ops sgiioc4_port_ops = {
+	.set_dma_mode		= sgiioc4_set_dma_mode,
+	/* reset DMA engine, clear IRQs */
+	.resetproc		= sgiioc4_resetproc,
+};
+
+static const struct ide_dma_ops sgiioc4_dma_ops = {
+	.dma_host_set		= sgiioc4_dma_host_set,
+	.dma_setup		= sgiioc4_dma_setup,
+	.dma_start		= sgiioc4_dma_start,
+	.dma_end		= sgiioc4_dma_end,
+	.dma_test_irq		= sgiioc4_dma_test_irq,
+	.dma_lost_irq		= sgiioc4_dma_lost_irq,
+	.dma_timeout		= ide_dma_timeout,
+};
+
+static const struct ide_port_info sgiioc4_port_info __devinitdata = {
+	.name			= DRV_NAME,
+	.chipset		= ide_pci,
+	.init_dma		= ide_dma_sgiioc4,
+	.tp_ops			= &sgiioc4_tp_ops,
+	.port_ops		= &sgiioc4_port_ops,
+	.dma_ops		= &sgiioc4_dma_ops,
+	.host_flags		= IDE_HFLAG_MMIO,
+	.mwdma_mask		= ATA_MWDMA2_ONLY,
+};
+
+static int __devinit
+sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
+{
+	unsigned long cmd_base, irqport;
+	unsigned long bar0, cmd_phys_base, ctl;
+	void __iomem *virt_base;
+	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+	int rc;
+
+	/*  Get the CmdBlk and CtrlBlk Base Registers */
+	bar0 = pci_resource_start(dev, 0);
+	virt_base = pci_ioremap_bar(dev, 0);
+	if (virt_base == NULL) {
+		printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
+				DRV_NAME, bar0);
+		return -ENOMEM;
+	}
+	cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET;
+	ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET;
+	irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET;
+
+	cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
+	if (request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
+			       DRV_NAME) == NULL) {
+		printk(KERN_ERR "%s %s -- ERROR: addresses 0x%08lx to 0x%08lx "
+		       "already in use\n", DRV_NAME, pci_name(dev),
+		       cmd_phys_base, cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
+		rc = -EBUSY;
+		goto req_mem_rgn_err;
+	}
+
+	/* Initialize the IO registers */
+	memset(&hw, 0, sizeof(hw));
+	sgiioc4_init_hwif_ports(&hw, cmd_base, ctl, irqport);
+	hw.irq = dev->irq;
+	hw.chipset = ide_pci;
+	hw.dev = &dev->dev;
+
+	/* Initializing chipset IRQ Registers */
+	writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
+
+	rc = ide_host_add(&sgiioc4_port_info, hws, NULL);
+	if (!rc)
+		return 0;
+
+	release_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE);
+req_mem_rgn_err:
+	iounmap(virt_base);
+	return rc;
+}
+
+static unsigned int __devinit
+pci_init_sgiioc4(struct pci_dev *dev)
+{
+	int ret;
+
+	printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n",
+			 DRV_NAME, pci_name(dev), dev->revision);
+
+	if (dev->revision < IOC4_SUPPORTED_FIRMWARE_REV) {
+		printk(KERN_ERR "Skipping %s IDE controller in slot %s: "
+				"firmware is obsolete - please upgrade to "
+				"revision46 or higher\n",
+				DRV_NAME, pci_name(dev));
+		ret = -EAGAIN;
+		goto out;
+	}
+	ret = sgiioc4_ide_setup_pci_device(dev);
+out:
+	return ret;
+}
+
+int
+ioc4_ide_attach_one(struct ioc4_driver_data *idd)
+{
+	/* PCI-RT does not bring out IDE connection.
+	 * Do not attach to this particular IOC4.
+	 */
+	if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
+		return 0;
+
+	return pci_init_sgiioc4(idd->idd_pdev);
+}
+
+static struct ioc4_submodule ioc4_ide_submodule = {
+	.is_name = "IOC4_ide",
+	.is_owner = THIS_MODULE,
+	.is_probe = ioc4_ide_attach_one,
+/*	.is_remove = ioc4_ide_remove_one,	*/
+};
+
+static int __init ioc4_ide_init(void)
+{
+	return ioc4_register_submodule(&ioc4_ide_submodule);
+}
+
+late_initcall(ioc4_ide_init); /* Call only after IDE init is done */
+
+MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
+MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
+MODULE_LICENSE("GPL");