[MIPS] Support for the RM9000-based Basler eXcite smart camera platform.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

11 files changed, 1767 insertions, 0 deletions

diff --git a/arch/mips/basler/excite/Makefile b/arch/mips/basler/excite/Makefile
new file mode 100644
index 000000000000..519142c2e4ef
--- /dev/null
+++ b/arch/mips/basler/excite/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for Basler eXcite
+#
+
+obj-$(CONFIG_BASLER_EXCITE)	+= excite_irq.o excite_prom.o excite_setup.o \
+				   excite_device.o excite_procfs.o
+
+obj-$(CONFIG_KGDB)		+= excite_dbg_io.o
+obj-m				+= excite_iodev.o
diff --git a/arch/mips/basler/excite/excite_dbg_io.c b/arch/mips/basler/excite/excite_dbg_io.c
new file mode 100644
index 000000000000..83f6bddf578b
--- /dev/null
+++ b/arch/mips/basler/excite/excite_dbg_io.c
@@ -0,0 +1,122 @@
+/*
+ *  Copyright (C) 2004 by Basler Vision Technologies AG
+ *  Author: Thomas Koeller <thomas.koeller@baslerweb.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/gdb-stub.h>
+#include <asm/rm9k-ocd.h>
+#include <excite.h>
+
+#if defined(CONFIG_SERIAL_8250) && CONFIG_SERIAL_8250_NR_UARTS > 1
+#error Debug port used by serial driver
+#endif
+
+#define UART_CLK		25000000
+#define BASE_BAUD		(UART_CLK / 16)
+#define REGISTER_BASE_0		0x0208UL
+#define REGISTER_BASE_1		0x0238UL
+
+#define REGISTER_BASE_DBG	REGISTER_BASE_1
+
+#define CPRR	0x0004
+#define UACFG	0x0200
+#define UAINTS	0x0204
+#define UARBR	(REGISTER_BASE_DBG + 0x0000)
+#define UATHR	(REGISTER_BASE_DBG + 0x0004)
+#define UADLL	(REGISTER_BASE_DBG + 0x0008)
+#define UAIER	(REGISTER_BASE_DBG + 0x000c)
+#define UADLH	(REGISTER_BASE_DBG + 0x0010)
+#define UAIIR	(REGISTER_BASE_DBG + 0x0014)
+#define UAFCR	(REGISTER_BASE_DBG + 0x0018)
+#define UALCR	(REGISTER_BASE_DBG + 0x001c)
+#define UAMCR	(REGISTER_BASE_DBG + 0x0020)
+#define UALSR	(REGISTER_BASE_DBG + 0x0024)
+#define UAMSR	(REGISTER_BASE_DBG + 0x0028)
+#define UASCR	(REGISTER_BASE_DBG + 0x002c)
+
+#define	PARITY_NONE	0
+#define	PARITY_ODD	0x08
+#define	PARITY_EVEN	0x18
+#define	PARITY_MARK	0x28
+#define	PARITY_SPACE	0x38
+
+#define	DATA_5BIT	0x0
+#define	DATA_6BIT	0x1
+#define	DATA_7BIT	0x2
+#define	DATA_8BIT	0x3
+
+#define	STOP_1BIT	0x0
+#define	STOP_2BIT	0x4
+
+#define BAUD_DBG	57600
+#define	PARITY_DBG	PARITY_NONE
+#define	DATA_DBG	DATA_8BIT
+#define	STOP_DBG	STOP_1BIT
+
+/* Initialize the serial port for KGDB debugging */
+void __init excite_kgdb_init(void)
+{
+	const u32 divisor = BASE_BAUD / BAUD_DBG;
+
+	/* Take the UART out of reset */
+	titan_writel(0x00ff1cff, CPRR);
+	titan_writel(0x00000000, UACFG);
+	titan_writel(0x00000002, UACFG);
+
+	titan_writel(0x0, UALCR);
+	titan_writel(0x0, UAIER);
+
+	/* Disable FIFOs */
+	titan_writel(0x00, UAFCR);
+
+	titan_writel(0x80, UALCR);
+	titan_writel(divisor & 0xff, UADLL);
+	titan_writel((divisor & 0xff00) >> 8, UADLH);
+	titan_writel(0x0, UALCR);
+
+	titan_writel(DATA_DBG | PARITY_DBG | STOP_DBG, UALCR);
+
+	/* Enable receiver interrupt */
+	titan_readl(UARBR);
+	titan_writel(0x1, UAIER);
+}
+
+int getDebugChar(void)
+{
+	while (!(titan_readl(UALSR) & 0x1));
+	return titan_readl(UARBR);
+}
+
+int putDebugChar(int data)
+{
+	while (!(titan_readl(UALSR) & 0x20));
+	titan_writel(data, UATHR);
+	return 1;
+}
+
+/* KGDB interrupt handler */
+asmlinkage void excite_kgdb_inthdl(struct pt_regs *regs)
+{
+	if (unlikely(
+		((titan_readl(UAIIR) & 0x7) == 4)
+		&& ((titan_readl(UARBR) & 0xff) == 0x3)))
+			set_async_breakpoint(&regs->cp0_epc);
+}
diff --git a/arch/mips/basler/excite/excite_device.c b/arch/mips/basler/excite/excite_device.c
new file mode 100644
index 000000000000..34ec76716fa0
--- /dev/null
+++ b/arch/mips/basler/excite/excite_device.c
@@ -0,0 +1,404 @@
+/*
+ *  Copyright (C) 2004 by Basler Vision Technologies AG
+ *  Author: Thomas Koeller <thomas.koeller@baslerweb.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/ioport.h>
+#include <linux/err.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <asm/types.h>
+#include <asm/rm9k-ocd.h>
+
+#include <excite.h>
+#include <rm9k_eth.h>
+#include <rm9k_wdt.h>
+#include <rm9k_xicap.h>
+#include <excite_nandflash.h>
+
+#include "excite_iodev.h"
+
+#define RM9K_GE_UNIT	0
+#define XICAP_UNIT	0
+#define NAND_UNIT	0
+
+#define DLL_TIMEOUT	3		/* seconds */
+
+
+#define RINIT(__start__, __end__, __name__, __parent__) {	\
+	.name	= __name__ "_0",				\
+	.start	= (__start__),					\
+	.end	= (__end__),					\
+	.flags	= 0,						\
+	.parent	= (__parent__)					\
+}
+
+#define RINIT_IRQ(__irq__, __name__) {	\
+	.name	= __name__ "_0",	\
+	.start	= (__irq__),		\
+	.end	= (__irq__),		\
+	.flags	= IORESOURCE_IRQ,	\
+	.parent	= NULL			\
+}
+
+
+
+enum {
+	slice_xicap,
+	slice_eth
+};
+
+
+
+static struct resource
+	excite_ctr_resource = {
+		.name		= "GPI counters",
+		.start		= 0,
+		.end		= 5,
+		.flags		= 0,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_gpislice_resource = {
+		.name		= "GPI slices",
+		.start		= 0,
+		.end		= 1,
+		.flags		= 0,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_mdio_channel_resource = {
+		.name		= "MDIO channels",
+		.start		= 0,
+		.end		= 1,
+		.flags		= 0,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_fifomem_resource = {
+		.name		= "FIFO memory",
+		.start		= 0,
+		.end		= 767,
+		.flags		= 0,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_scram_resource = {
+		.name		= "Scratch RAM",
+		.start		= EXCITE_PHYS_SCRAM,
+		.end		= EXCITE_PHYS_SCRAM + EXCITE_SIZE_SCRAM - 1,
+		.flags		= IORESOURCE_MEM,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_fpga_resource = {
+		.name		= "System FPGA",
+		.start		= EXCITE_PHYS_FPGA,
+		.end		= EXCITE_PHYS_FPGA + EXCITE_SIZE_FPGA - 1,
+		.flags		= IORESOURCE_MEM,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_nand_resource = {
+		.name		= "NAND flash control",
+		.start		= EXCITE_PHYS_NAND,
+		.end		= EXCITE_PHYS_NAND + EXCITE_SIZE_NAND - 1,
+		.flags		= IORESOURCE_MEM,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	},
+	excite_titan_resource = {
+		.name		= "TITAN registers",
+		.start		= EXCITE_PHYS_TITAN,
+		.end		= EXCITE_PHYS_TITAN + EXCITE_SIZE_TITAN - 1,
+		.flags		= IORESOURCE_MEM,
+		.parent		= NULL,
+		.sibling	= NULL,
+		.child		= NULL
+	};
+
+
+
+static void adjust_resources(struct resource *res, unsigned int n)
+{
+	struct resource *p;
+	const unsigned long mask = IORESOURCE_IO | IORESOURCE_MEM
+				   | IORESOURCE_IRQ | IORESOURCE_DMA;
+
+	for (p = res; p < res + n; p++) {
+		const struct resource * const parent = p->parent;
+		if (parent) {
+			p->start += parent->start;
+			p->end   += parent->start;
+			p->flags =  parent->flags & mask;
+		}
+	}
+}
+
+
+
+#if defined(CONFIG_EXCITE_FCAP_GPI) || defined(CONFIG_EXCITE_FCAP_GPI_MODULE)
+static struct resource xicap_rsrc[] = {
+	RINIT(0x4840, 0x486f, XICAP_RESOURCE_FIFO_RX, &excite_titan_resource),
+	RINIT(0x4940, 0x494b, XICAP_RESOURCE_FIFO_TX, &excite_titan_resource),
+	RINIT(0x5040, 0x5127, XICAP_RESOURCE_XDMA, &excite_titan_resource),
+	RINIT(0x1000, 0x112f, XICAP_RESOURCE_PKTPROC, &excite_titan_resource),
+	RINIT(0x1100, 0x110f, XICAP_RESOURCE_PKT_STREAM, &excite_fpga_resource),
+	RINIT(0x0800, 0x0bff, XICAP_RESOURCE_DMADESC, &excite_scram_resource),
+	RINIT(slice_xicap, slice_xicap, XICAP_RESOURCE_GPI_SLICE, &excite_gpislice_resource),
+	RINIT(0x0100, 0x02ff, XICAP_RESOURCE_FIFO_BLK, &excite_fifomem_resource),
+	RINIT_IRQ(TITAN_IRQ,  XICAP_RESOURCE_IRQ)
+};
+
+static struct platform_device xicap_pdev = {
+	.name		= XICAP_NAME,
+	.id		= XICAP_UNIT,
+	.num_resources	= ARRAY_SIZE(xicap_rsrc),
+	.resource	= xicap_rsrc
+};
+
+/*
+ * Create a platform device for the GPI port that receives the
+ * image data from the embedded camera.
+ */
+static int __init xicap_devinit(void)
+{
+	unsigned long tend;
+	u32 reg;
+	int retval;
+
+	adjust_resources(xicap_rsrc, ARRAY_SIZE(xicap_rsrc));
+
+	/* Power up the slice and configure it. */
+	reg = titan_readl(CPTC1R);
+	reg &= ~(0x11100 << slice_xicap);
+	titan_writel(reg, CPTC1R);
+
+	/* Enable slice & DLL. */
+	reg= titan_readl(CPRR);
+	reg &= ~(0x00030003 << (slice_xicap * 2));
+	titan_writel(reg, CPRR);
+
+	/* Wait for DLLs to lock */
+	tend = jiffies + DLL_TIMEOUT * HZ;
+	while (time_before(jiffies, tend)) {
+		if (!(~titan_readl(CPDSR) & (0x1 << (slice_xicap * 4))))
+			break;
+		yield();
+	}
+
+	if (~titan_readl(CPDSR) & (0x1 << (slice_xicap * 4))) {
+		printk(KERN_ERR "%s: DLL not locked after %u seconds\n",
+		       xicap_pdev.name, DLL_TIMEOUT);
+		retval = -ETIME;
+	} else {
+		/* Register platform device */
+		retval = platform_device_register(&xicap_pdev);
+	}
+
+	return retval;
+}
+
+device_initcall(xicap_devinit);
+#endif /* defined(CONFIG_EXCITE_FCAP_GPI) || defined(CONFIG_EXCITE_FCAP_GPI_MODULE) */
+
+
+
+#if defined(CONFIG_WDT_RM9K_GPI) || defined(CONFIG_WDT_RM9K_GPI_MODULE)
+static struct resource wdt_rsrc[] = {
+	RINIT(0, 0, WDT_RESOURCE_COUNTER, &excite_ctr_resource),
+	RINIT(0x0084, 0x008f, WDT_RESOURCE_REGS, &excite_titan_resource),
+	RINIT_IRQ(TITAN_IRQ,  WDT_RESOURCE_IRQ)
+};
+
+static struct platform_device wdt_pdev = {
+	.name		= WDT_NAME,
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(wdt_rsrc),
+	.resource	= wdt_rsrc
+};
+
+/*
+ * Create a platform device for the GPI port that receives the
+ * image data from the embedded camera.
+ */
+static int __init wdt_devinit(void)
+{
+	adjust_resources(wdt_rsrc, ARRAY_SIZE(wdt_rsrc));
+	return platform_device_register(&wdt_pdev);
+}
+
+device_initcall(wdt_devinit);
+#endif /* defined(CONFIG_WDT_RM9K_GPI) || defined(CONFIG_WDT_RM9K_GPI_MODULE) */
+
+
+
+static struct resource excite_nandflash_rsrc[] = {
+ 	RINIT(0x2000, 0x201f, EXCITE_NANDFLASH_RESOURCE_REGS,  &excite_nand_resource)
+};
+
+static struct platform_device excite_nandflash_pdev = {
+	.name		= "excite_nand",
+	.id		= NAND_UNIT,
+	.num_resources	= ARRAY_SIZE(excite_nandflash_rsrc),
+	.resource	= excite_nandflash_rsrc
+};
+
+/*
+ * Create a platform device for the access to the nand-flash
+ * port
+ */
+static int __init excite_nandflash_devinit(void)
+{
+	adjust_resources(excite_nandflash_rsrc, ARRAY_SIZE(excite_nandflash_rsrc));
+
+        /* nothing to be done here */
+
+        /* Register platform device */
+	return platform_device_register(&excite_nandflash_pdev);
+}
+
+device_initcall(excite_nandflash_devinit);
+
+
+
+static struct resource iodev_rsrc[] = {
+	RINIT_IRQ(FPGA1_IRQ,  IODEV_RESOURCE_IRQ)
+};
+
+static struct platform_device io_pdev = {
+	.name		= IODEV_NAME,
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(iodev_rsrc),
+	.resource	= iodev_rsrc
+};
+
+/*
+ * Create a platform device for the external I/O ports.
+ */
+static int __init io_devinit(void)
+{
+	adjust_resources(iodev_rsrc, ARRAY_SIZE(iodev_rsrc));
+	return platform_device_register(&io_pdev);
+}
+
+device_initcall(io_devinit);
+
+
+
+
+#if defined(CONFIG_RM9K_GE) || defined(CONFIG_RM9K_GE_MODULE)
+static struct resource rm9k_ge_rsrc[] = {
+	RINIT(0x2200, 0x27ff, RM9K_GE_RESOURCE_MAC, &excite_titan_resource),
+	RINIT(0x1800, 0x1fff, RM9K_GE_RESOURCE_MSTAT, &excite_titan_resource),
+	RINIT(0x2000, 0x212f, RM9K_GE_RESOURCE_PKTPROC, &excite_titan_resource),
+	RINIT(0x5140, 0x5227, RM9K_GE_RESOURCE_XDMA, &excite_titan_resource),
+	RINIT(0x4870, 0x489f, RM9K_GE_RESOURCE_FIFO_RX, &excite_titan_resource),
+	RINIT(0x494c, 0x4957, RM9K_GE_RESOURCE_FIFO_TX, &excite_titan_resource),
+	RINIT(0x0000, 0x007f, RM9K_GE_RESOURCE_FIFOMEM_RX, &excite_fifomem_resource),
+	RINIT(0x0080, 0x00ff, RM9K_GE_RESOURCE_FIFOMEM_TX, &excite_fifomem_resource),
+	RINIT(0x0180, 0x019f, RM9K_GE_RESOURCE_PHY, &excite_titan_resource),
+	RINIT(0x0000, 0x03ff, RM9K_GE_RESOURCE_DMADESC_RX, &excite_scram_resource),
+	RINIT(0x0400, 0x07ff, RM9K_GE_RESOURCE_DMADESC_TX, &excite_scram_resource),
+	RINIT(slice_eth, slice_eth, RM9K_GE_RESOURCE_GPI_SLICE, &excite_gpislice_resource),
+	RINIT(0, 0, RM9K_GE_RESOURCE_MDIO_CHANNEL, &excite_mdio_channel_resource),
+	RINIT_IRQ(TITAN_IRQ,  RM9K_GE_RESOURCE_IRQ_MAIN),
+	RINIT_IRQ(PHY_IRQ, RM9K_GE_RESOURCE_IRQ_PHY)
+};
+
+static struct platform_device rm9k_ge_pdev = {
+	.name		= RM9K_GE_NAME,
+	.id		= RM9K_GE_UNIT,
+	.num_resources	= ARRAY_SIZE(rm9k_ge_rsrc),
+	.resource	= rm9k_ge_rsrc
+};
+
+
+
+/*
+ * Create a platform device for the Ethernet port.
+ */
+static int __init rm9k_ge_devinit(void)
+{
+	u32 reg;
+
+	adjust_resources(rm9k_ge_rsrc, ARRAY_SIZE(rm9k_ge_rsrc));
+
+	/* Power up the slice and configure it. */
+	reg = titan_readl(CPTC1R);
+	reg &= ~(0x11000 << slice_eth);
+	reg |= 0x100 << slice_eth;
+	titan_writel(reg, CPTC1R);
+
+	/* Take the MAC out of reset, reset the DLLs. */
+	reg = titan_readl(CPRR);
+	reg &= ~(0x00030000 << (slice_eth * 2));
+	reg |= 0x3 << (slice_eth * 2);
+	titan_writel(reg, CPRR);
+
+	return platform_device_register(&rm9k_ge_pdev);
+}
+
+device_initcall(rm9k_ge_devinit);
+#endif /* defined(CONFIG_RM9K_GE) || defined(CONFIG_RM9K_GE_MODULE) */
+
+
+
+static int __init excite_setup_devs(void)
+{
+	int res;
+	u32 reg;
+
+	/* Enable xdma and fifo interrupts */
+	reg = titan_readl(0x0050);
+	titan_writel(reg | 0x18000000, 0x0050);
+
+	res = request_resource(&iomem_resource, &excite_titan_resource);
+	if (res)
+		return res;
+	res = request_resource(&iomem_resource, &excite_scram_resource);
+	if (res)
+		return res;
+	res = request_resource(&iomem_resource, &excite_fpga_resource);
+	if (res)
+		return res;
+	res = request_resource(&iomem_resource, &excite_nand_resource);
+	if (res)
+		return res;
+	excite_fpga_resource.flags = excite_fpga_resource.parent->flags &
+				   ( IORESOURCE_IO | IORESOURCE_MEM
+				   | IORESOURCE_IRQ | IORESOURCE_DMA);
+	excite_nand_resource.flags = excite_nand_resource.parent->flags &
+				   ( IORESOURCE_IO | IORESOURCE_MEM
+				   | IORESOURCE_IRQ | IORESOURCE_DMA);
+
+	return 0;
+}
+
+arch_initcall(excite_setup_devs);
+
diff --git a/arch/mips/basler/excite/excite_flashtest.c b/arch/mips/basler/excite/excite_flashtest.c
new file mode 100644
index 000000000000..f0024a8e3294
--- /dev/null
+++ b/arch/mips/basler/excite/excite_flashtest.c
@@ -0,0 +1,294 @@
+/*
+*  Copyright (C) 2005 by Basler Vision Technologies AG
+*  Author: Thies Moeller <thies.moeller@baslerweb.com>
+*
+*  This program is free software; you can redistribute it and/or modify
+*  it under the terms of the GNU General Public License as published by
+*  the Free Software Foundation; either version 2 of the License, or
+*  (at your option) any later version.
+*
+*  This program is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*  GNU General Public License for more details.
+*
+*  You should have received a copy of the GNU General Public License
+*  along with this program; if not, write to the Free Software
+*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+
+#include <excite.h>
+
+#include <asm/io.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/mtd/partitions.h>
+#include <asm/rm9k-ocd.h> // for ocd_write
+#include <linux/workqueue.h> // for queue
+
+#include "excite_nandflash.h"
+#include "nandflash.h"
+
+#define PFX "excite flashtest: "
+typedef void __iomem *io_reg_t;
+
+#define io_readb(__a__)		__raw_readb((__a__))
+#define io_writeb(__v__, __a__)	__raw_writeb((__v__), (__a__))
+
+
+
+static inline const struct resource *excite_nandflash_get_resource(
+	struct platform_device *d, unsigned long flags, const char *basename)
+{
+	const char fmt[] = "%s_%u";
+	char buf[80];
+
+	if (unlikely(snprintf(buf, sizeof buf, fmt, basename, d->id) >= sizeof buf))
+		return NULL;
+
+	return platform_get_resource_byname(d, flags, buf);
+}
+
+static inline io_reg_t
+excite_nandflash_map_regs(struct platform_device *d, const char *basename)
+{
+	void *result = NULL;
+	const struct resource *const r =
+	    excite_nandflash_get_resource(d, IORESOURCE_MEM, basename);
+	if (r)
+	   result = ioremap_nocache(r->start, r->end + 1 - r->start);
+	return result;
+}
+
+/* controller and mtd information */
+
+struct excite_nandflash_drvdata {
+	struct mtd_info board_mtd;
+	struct nand_chip board_chip;
+	io_reg_t regs;
+};
+
+
+/* command and control functions */
+static void excite_nandflash_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+	struct nand_chip *this = mtd->priv;
+	io_reg_t regs = container_of(mtd,struct excite_nandflash_drvdata,board_mtd)->regs;
+
+	switch (cmd) {
+	/* Select the command latch */
+	case NAND_CTL_SETCLE: this->IO_ADDR_W = regs + EXCITE_NANDFLASH_CMD;
+		break;
+	/* Deselect the command latch */
+	case NAND_CTL_CLRCLE: this->IO_ADDR_W = regs + EXCITE_NANDFLASH_DATA;
+		break;
+	/* Select the address latch */
+	case NAND_CTL_SETALE: this->IO_ADDR_W = regs + EXCITE_NANDFLASH_ADDR;
+		break;
+	/* Deselect the address latch */
+	case NAND_CTL_CLRALE: this->IO_ADDR_W = regs  + EXCITE_NANDFLASH_DATA;
+		break;
+	/* Select the chip  -- not used */
+	case NAND_CTL_SETNCE:
+		break;
+	/* Deselect the chip -- not used */
+	case NAND_CTL_CLRNCE:
+		break;
+	}
+
+	this->IO_ADDR_R = this->IO_ADDR_W;
+}
+
+/* excite_nandflash_devready()
+ *
+ * returns 0 if the nand is busy, 1 if it is ready
+ */
+static int excite_nandflash_devready(struct mtd_info *mtd)
+{
+	struct excite_nandflash_drvdata *drvdata =
+	    container_of(mtd, struct excite_nandflash_drvdata, board_mtd);
+
+	return io_readb(drvdata->regs + EXCITE_NANDFLASH_STATUS);
+}
+
+/* device management functions */
+
+/* excite_nandflash_remove
+ *
+ * called by device layer to remove the driver
+ * the binding to the mtd and all allocated
+ * resources are released
+ */
+static int excite_nandflash_remove(struct device *dev)
+{
+	struct excite_nandflash_drvdata *this = dev_get_drvdata(dev);
+
+	pr_info(PFX "remove");
+
+	dev_set_drvdata(dev, NULL);
+
+	if (this == NULL) {
+		pr_debug(PFX "call remove without private data!!");
+		return 0;
+	}
+
+
+	/* free the common resources */
+	if (this->regs != NULL) {
+		iounmap(this->regs);
+		this->regs = NULL;
+	}
+
+	kfree(this);
+
+	return 0;
+}
+
+static int elapsed;
+
+void my_workqueue_handler(void *arg)
+{
+	elapsed = 1;
+}
+
+DECLARE_WORK(sigElapsed, my_workqueue_handler, 0);
+
+
+/* excite_nandflash_probe
+ *
+ * called by device layer when it finds a device matching
+ * one our driver can handled. This code checks to see if
+ * it can allocate all necessary resources then calls the
+ * nand layer to look for devices
+*/
+static int excite_nandflash_probe(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	struct excite_nandflash_drvdata *drvdata;	    /* private driver data     */
+	struct nand_chip              *board_chip;  /* private flash chip data */
+	struct mtd_info               *board_mtd;   /* mtd info for this board */
+
+	int err      = 0;
+	int count    = 0;
+	struct timeval tv,endtv;
+	unsigned int dt;
+
+	pr_info(PFX "probe dev: (%p)\n", dev);
+
+	pr_info(PFX "adjust LB timing\n");
+	ocd_writel(0x00000330, LDP2);
+
+	drvdata = kmalloc(sizeof(*drvdata), GFP_KERNEL);
+	if (unlikely(!drvdata)) {
+		printk(KERN_ERR PFX "no memory for drvdata\n");
+		err = -ENOMEM;
+		goto mem_error;
+	}
+
+	/* Initialize structures */
+	memset(drvdata, 0, sizeof(*drvdata));
+
+	/* bind private data into driver */
+	dev_set_drvdata(dev, drvdata);
+
+	/* allocate and map the resource */
+	drvdata->regs =
+	    excite_nandflash_map_regs(pdev, EXCITE_NANDFLASH_RESOURCE_REGS);
+
+	if (unlikely(!drvdata->regs)) {
+		printk(KERN_ERR PFX "cannot reserve register region\n");
+		err = -ENXIO;
+		goto io_error;
+	}
+
+	/* initialise our chip */
+	board_chip = &drvdata->board_chip;
+
+	board_chip->IO_ADDR_R = drvdata->regs + EXCITE_NANDFLASH_DATA;
+	board_chip->IO_ADDR_W = drvdata->regs + EXCITE_NANDFLASH_DATA;
+
+	board_chip->hwcontrol = excite_nandflash_hwcontrol;
+	board_chip->dev_ready = excite_nandflash_devready;
+
+	board_chip->chip_delay = 25;
+	#if 0
+	/* TODO: speedup the initial scan */
+	board_chip->options = NAND_USE_FLASH_BBT;
+	#endif
+	board_chip->eccmode = NAND_ECC_SOFT;
+
+	/* link chip to mtd */
+	board_mtd = &drvdata->board_mtd;
+	board_mtd->priv = board_chip;
+
+
+	pr_info(PFX "FlashTest\n");
+	elapsed = 0;
+/*	schedule_delayed_work(&sigElapsed, 1*HZ);
+	while (!elapsed) {
+		io_readb(drvdata->regs + EXCITE_NANDFLASH_STATUS);
+		count++;
+	}
+	pr_info(PFX "reads in 1 sec --> %d\n",count);
+*/
+	do_gettimeofday(&tv);
+	for (count = 0 ; count < 1000000; count ++) {
+		io_readb(drvdata->regs + EXCITE_NANDFLASH_STATUS);
+	}
+	do_gettimeofday(&endtv);
+	dt = (endtv.tv_sec - tv.tv_sec) * 1000000 + endtv.tv_usec  - tv.tv_usec;
+	pr_info(PFX "%8d us timeval\n",dt);
+	pr_info(PFX "EndFlashTest\n");
+
+/*      return with error to unload everything
+*/
+io_error:
+	iounmap(drvdata->regs);
+
+mem_error:
+	kfree(drvdata);
+
+	if (err == 0)
+		err = -EINVAL;
+	return err;
+}
+
+static struct device_driver excite_nandflash_driver = {
+	.name = "excite_nand",
+	.bus = &platform_bus_type,
+	.probe = excite_nandflash_probe,
+	.remove = excite_nandflash_remove,
+};
+
+static int __init excite_nandflash_init(void)
+{
+	pr_info(PFX "register Driver (Rev: $Revision:$)\n");
+	return driver_register(&excite_nandflash_driver);
+}
+
+static void __exit excite_nandflash_exit(void)
+{
+	driver_unregister(&excite_nandflash_driver);
+	pr_info(PFX "Driver unregistered");
+}
+
+module_init(excite_nandflash_init);
+module_exit(excite_nandflash_exit);
+
+MODULE_AUTHOR("Thies Moeller <thies.moeller@baslerweb.com>");
+MODULE_DESCRIPTION("Basler eXcite NAND-Flash driver");
+MODULE_LICENSE("GPL");
diff --git a/arch/mips/basler/excite/excite_fpga.h b/arch/mips/basler/excite/excite_fpga.h
new file mode 100644
index 000000000000..38fcda703a0b
--- /dev/null
+++ b/arch/mips/basler/excite/excite_fpga.h
@@ -0,0 +1,80 @@
+#ifndef EXCITE_FPGA_H_INCLUDED
+#define EXCITE_FPGA_H_INCLUDED
+
+
+/**
+ * Adress alignment of the individual FPGA bytes.
+ * The address arrangement of the individual bytes of the FPGA is two
+ * byte aligned at the embedded MK2 platform.
+ */
+#ifdef EXCITE_CCI_FPGA_MK2
+typedef unsigned char excite_cci_fpga_align_t __attribute__ ((aligned(2)));
+#else
+typedef unsigned char excite_cci_fpga_align_t;
+#endif
+
+
+/**
+ * Size of Dual Ported RAM.
+ */
+#define EXCITE_DPR_SIZE 263
+
+
+/**
+ * Size of Reserved Status Fields in Dual Ported RAM.
+ */
+#define EXCITE_DPR_STATUS_SIZE 7
+
+
+
+/**
+ * FPGA.
+ * Hardware register layout of the FPGA interface. The FPGA must accessed
+ * byte wise solely.
+ * @see EXCITE_CCI_DPR_MK2
+ */
+typedef struct excite_fpga {
+
+	/**
+	 * Dual Ported RAM.
+	 */
+	excite_cci_fpga_align_t dpr[EXCITE_DPR_SIZE];
+
+	/**
+	 * Status.
+	 */
+	excite_cci_fpga_align_t status[EXCITE_DPR_STATUS_SIZE];
+
+#ifdef EXCITE_CCI_FPGA_MK2
+	/**
+	 * RM9000 Interrupt.
+	 * Write access initiates interrupt at the RM9000 (MIPS) processor of the eXcite.
+	 */
+	excite_cci_fpga_align_t rm9k_int;
+#else
+	/**
+	 * MK2 Interrupt.
+	 * Write access initiates interrupt at the ARM processor of the MK2.
+	 */
+	excite_cci_fpga_align_t mk2_int;
+
+	excite_cci_fpga_align_t gap[0x1000-0x10f];
+
+	/**
+	 * IRQ Source/Acknowledge.
+	 */
+	excite_cci_fpga_align_t rm9k_irq_src;
+
+	/**
+	 * IRQ Mask.
+	 * Set bits enable the related interrupt.
+	 */
+	excite_cci_fpga_align_t rm9k_irq_mask;
+#endif
+
+
+} excite_fpga;
+
+
+
+#endif	/* ndef EXCITE_FPGA_H_INCLUDED */
diff --git a/arch/mips/basler/excite/excite_iodev.c b/arch/mips/basler/excite/excite_iodev.c
new file mode 100644
index 000000000000..91121e523043
--- /dev/null
+++ b/arch/mips/basler/excite/excite_iodev.c
@@ -0,0 +1,183 @@
+/*
+ *  Copyright (C) 2005 by Basler Vision Technologies AG
+ *  Author: Thomas Koeller <thomas.koeller@baslerweb.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/config.h>
+#include <linux/compiler.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/miscdevice.h>
+
+#include "excite_iodev.h"
+
+
+
+static const struct resource *iodev_get_resource(struct platform_device *, const char *, unsigned int);
+static int __init iodev_probe(struct device *);
+static int __exit iodev_remove(struct device *);
+static int iodev_open(struct inode *, struct file *);
+static int iodev_release(struct inode *, struct file *);
+static ssize_t iodev_read(struct file *, char __user *, size_t s, loff_t *);
+static unsigned int iodev_poll(struct file *, struct poll_table_struct *);
+static irqreturn_t iodev_irqhdl(int, void *, struct pt_regs *);
+
+
+
+static const char iodev_name[] = "iodev";
+static unsigned int iodev_irq;
+static DECLARE_WAIT_QUEUE_HEAD(wq);
+
+
+
+static struct file_operations fops =
+{
+	.owner		= THIS_MODULE,
+	.open		= iodev_open,
+	.release	= iodev_release,
+	.read		= iodev_read,
+	.poll		= iodev_poll
+};
+
+static struct miscdevice miscdev =
+{
+	.minor		= MISC_DYNAMIC_MINOR,
+	.name		= iodev_name,
+	.fops		= &fops
+};
+
+static struct device_driver iodev_driver =
+{
+	.name		= (char *) iodev_name,
+	.bus		= &platform_bus_type,
+	.owner		= THIS_MODULE,
+	.probe		= iodev_probe,
+	.remove		= __exit_p(iodev_remove)
+};
+
+
+
+static const struct resource *
+iodev_get_resource(struct platform_device *pdv, const char *name,
+		     unsigned int type)
+{
+	char buf[80];
+	if (snprintf(buf, sizeof buf, "%s_0", name) >= sizeof buf)
+		return NULL;
+	return platform_get_resource_byname(pdv, type, buf);
+}
+
+
+
+/* No hotplugging on the platform bus - use __init */
+static int __init iodev_probe(struct device *dev)
+{
+	struct platform_device * const pdv = to_platform_device(dev);
+	const struct resource * const ri =
+		iodev_get_resource(pdv, IODEV_RESOURCE_IRQ, IORESOURCE_IRQ);
+
+	if (unlikely(!ri))
+		return -ENXIO;
+
+	iodev_irq = ri->start;
+	return misc_register(&miscdev);
+}
+
+
+
+static int __exit iodev_remove(struct device *dev)
+{
+	return misc_deregister(&miscdev);
+}
+
+
+
+static int iodev_open(struct inode *i, struct file *f)
+{
+	return request_irq(iodev_irq, iodev_irqhdl, SA_INTERRUPT,
+			   iodev_name, &miscdev);
+}
+
+
+
+static int iodev_release(struct inode *i, struct file *f)
+{
+	free_irq(iodev_irq, &miscdev);
+	return 0;
+}
+
+
+
+
+static ssize_t
+iodev_read(struct file *f, char __user *d, size_t s, loff_t *o)
+{
+	ssize_t ret;
+	DEFINE_WAIT(w);
+
+	prepare_to_wait(&wq, &w, TASK_INTERRUPTIBLE);
+	if (!signal_pending(current))
+		schedule();
+	ret = signal_pending(current) ? -ERESTARTSYS : 0;
+	finish_wait(&wq, &w);
+	return ret;
+}
+
+
+static unsigned int iodev_poll(struct file *f, struct poll_table_struct *p)
+{
+	poll_wait(f, &wq, p);
+	return POLLOUT | POLLWRNORM;
+}
+
+
+