move danube folder to ifxmips, to allow future integration of the other chips

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9815 3c298f89-4303-0410-b956-a3cf2f4a3e73

5 files changed, 3000 insertions, 0 deletions

diff --git a/target/linux/ifxmips/files/drivers/char/danube_eeprom.c b/target/linux/ifxmips/files/drivers/char/danube_eeprom.c
new file mode 100644
index 0000000000..1835f2776e
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/char/danube_eeprom.c
@@ -0,0 +1,541 @@
+/*
+ *   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.
+ *
+ *   This driver was originally based on the INCA-IP driver, but due to
+ *   fundamental conceptual drawbacks there has been changed a lot.
+ *
+ *   Based on INCA-IP driver Copyright (c) 2003 Gary Jennejohn <gj@denx.de>
+ *   Based on the VxWorks drivers Copyright (c) 2002, Infineon Technologies.
+ *
+ *   Copyright (C) 2006 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ *
+ */
+
+#define IFAP_EEPROM_DRV_VERSION "0.0.1"
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+
+#include <asm/danube/danube.h>
+#include <asm/danube/danube_irq.h>
+#include <asm/danube/ifx_ssc_defines.h>
+#include <asm/danube/ifx_ssc.h>
+
+/* allow the user to set the major device number */
+static int danube_eeprom_maj = 0;
+
+extern int ifx_ssc_init (void);
+extern int ifx_ssc_open (struct inode *inode, struct file *filp);
+extern int ifx_ssc_close (struct inode *inode, struct file *filp);
+extern void ifx_ssc_cleanup_module (void);
+extern int ifx_ssc_ioctl (struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long data);
+extern ssize_t ifx_ssc_kwrite (int port, const char *kbuf, size_t len);
+extern ssize_t ifx_ssc_kread (int port, char *kbuf, size_t len);
+
+extern int ifx_ssc_cs_low (unsigned int pin);
+extern int ifx_ssc_cs_high (unsigned int pin);
+extern int ifx_ssc_txrx (char *tx_buf, unsigned int tx_len, char *rx_buf, unsigned int rx_len);
+extern int ifx_ssc_tx (char *tx_buf, unsigned int tx_len);
+extern int ifx_ssc_rx (char *rx_buf, unsigned int rx_len);
+
+#define EEPROM_CS IFX_SSC_WHBGPOSTAT_OUT0_POS
+
+/* commands for EEPROM, x25160, x25140 */
+#define EEPROM_WREN			((unsigned char)0x06)
+#define EEPROM_WRDI			((unsigned char)0x04)
+#define EEPROM_RDSR			((unsigned char)0x05)
+#define EEPROM_WRSR			((unsigned char)0x01)
+#define EEPROM_READ			((unsigned char)0x03)
+#define EEPROM_WRITE			((unsigned char)0x02)
+#define EEPROM_PAGE_SIZE		4
+#define EEPROM_SIZE			512
+
+static int
+eeprom_rdsr (void)
+{
+	int ret = 0;
+	unsigned char cmd = EEPROM_RDSR;
+	unsigned long flag;
+	char status;
+
+	local_irq_save(flag);
+
+	if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
+		if ((ret = ifx_ssc_txrx(&cmd, 1, &status, 1)) >= 0)
+			ret = status & 1;
+
+	ifx_ssc_cs_high(EEPROM_CS);
+	local_irq_restore(flag);
+
+	return ret;
+}
+
+void
+eeprom_wip_over (void)
+{
+	while (eeprom_rdsr())
+		printk("waiting for eeprom\n");
+}
+
+static int
+eeprom_wren (void)
+{
+	unsigned char cmd = EEPROM_WREN;
+	int ret = 0;
+	unsigned long flag;
+
+	local_irq_save(flag);
+	if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
+		if ((ret = ifx_ssc_tx(&cmd, 1)) >= 0)
+			ret = 0;
+
+	ifx_ssc_cs_high(EEPROM_CS);
+	local_irq_restore(flag);
+
+	if (!ret)
+		eeprom_wip_over();
+
+	return ret;
+}
+
+static int
+eeprom_wrsr (void)
+{
+	int ret = 0;
+	unsigned char cmd[2];
+	unsigned long flag;
+
+	cmd[0] = EEPROM_WRSR;
+	cmd[1] = 0;
+
+	if ((ret = eeprom_wren()))
+	{
+		printk ("eeprom_wren fails\n");
+		goto out1;
+	}
+
+	local_irq_save(flag);
+
+	if ((ret = ifx_ssc_cs_low(EEPROM_CS)))
+		goto out;
+
+	if ((ret = ifx_ssc_tx(cmd, 2)) < 0) {
+		ifx_ssc_cs_high(EEPROM_CS);
+		goto out;
+	}
+
+	if ((ret = ifx_ssc_cs_low(EEPROM_CS)))
+		goto out;
+
+	local_irq_restore(flag);
+	eeprom_wip_over();
+
+	return ret;
+
+out:
+	local_irq_restore (flag);
+	eeprom_wip_over ();
+
+out1:
+	return ret;
+}
+
+static int
+eeprom_read (unsigned int addr, unsigned char *buf, unsigned int len)
+{
+	int ret = 0;
+	unsigned char write_buf[2];
+	unsigned int eff = 0;
+	unsigned long flag;
+
+	while (1)
+	{
+		eeprom_wip_over();
+		eff = EEPROM_PAGE_SIZE - (addr % EEPROM_PAGE_SIZE);
+		eff = (eff < len) ? eff : len;
+		local_irq_save(flag);
+
+		if ((ret = ifx_ssc_cs_low(EEPROM_CS)) < 0)
+			goto out;
+
+		write_buf[0] = EEPROM_READ | ((unsigned char) ((addr & 0x100) >> 5));
+		write_buf[1] = (addr & 0xff);
+
+		if ((ret = ifx_ssc_txrx (write_buf, 2, buf, eff)) != eff)
+		{
+			printk("ssc_txrx fails %d\n", ret);
+			ifx_ssc_cs_high (EEPROM_CS);
+			goto out;
+		}
+
+		buf += ret;
+		len -= ret;
+		addr += ret;
+
+		if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
+			goto out;
+
+		local_irq_restore(flag);
+
+		if (len <= 0)
+			goto out2;
+	}
+
+out:
+	local_irq_restore (flag);
+out2:
+	return ret;
+}
+
+static int
+eeprom_write (unsigned int addr, unsigned char *buf, unsigned int len)
+{
+	int ret = 0;
+	unsigned int eff = 0;
+	unsigned char write_buf[2];
+	int i;
+	unsigned char rx_buf[EEPROM_PAGE_SIZE];
+
+	while (1)
+	{
+		eeprom_wip_over();
+
+		if ((ret = eeprom_wren()))
+		{
+			printk("eeprom_wren fails\n");
+			goto out;
+		}
+
+		write_buf[0] = EEPROM_WRITE | ((unsigned char) ((addr & 0x100) >> 5));
+		write_buf[1] = (addr & 0xff);
+
+		eff = EEPROM_PAGE_SIZE - (addr % EEPROM_PAGE_SIZE);
+		eff = (eff < len) ? eff : len;
+
+		printk("EEPROM Write:\n");
+		for (i = 0; i < eff; i++) {
+			printk("%2x ", buf[i]);
+			if ((i % 16) == 15)
+				printk("\n");
+		}
+		printk("\n");
+
+		if ((ret = ifx_ssc_cs_low(EEPROM_CS)))
+			goto out;
+
+		if ((ret = ifx_ssc_tx (write_buf, 2)) < 0)
+		{
+			printk("ssc_tx fails %d\n", ret);
+			ifx_ssc_cs_high(EEPROM_CS);
+			goto out;
+		}
+
+		if ((ret = ifx_ssc_tx (buf, eff)) != eff)
+		{
+			printk("ssc_tx fails %d\n", ret);
+			ifx_ssc_cs_high(EEPROM_CS);
+			goto out;
+		}
+
+		buf += ret;
+		len -= ret;
+		addr += ret;
+
+		if ((ret = ifx_ssc_cs_high (EEPROM_CS)))
+			goto out;
+
+		printk ("<==");
+		eeprom_read((addr - eff), rx_buf, eff);
+		for (i = 0; i < eff; i++)
+		{
+			printk ("[%x]", rx_buf[i]);
+		}
+		printk ("\n");
+
+		if (len <= 0)
+			break;
+	}
+
+out:
+	return ret;
+}
+
+int
+danube_eeprom_open (struct inode *inode, struct file *filp)
+{
+	filp->f_pos = 0;
+	return 0;
+}
+
+int
+danube_eeprom_close (struct inode *inode, struct file *filp)
+{
+	return 0;
+}
+
+int
+danube_eeprom_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data)
+{
+	return 0;
+}
+
+ssize_t
+danube_eeprom_read (char *buf, size_t len, unsigned int addr)
+{
+	int ret = 0;
+	unsigned int data;
+
+	printk("addr:=%d\n", addr);
+	printk("len:=%d\n", len);
+
+	if ((addr + len) > EEPROM_SIZE)
+	{
+		printk("invalid len\n");
+		addr = 0;
+		len = EEPROM_SIZE / 2;
+	}
+
+	if ((ret = ifx_ssc_open((struct inode *) 0, NULL)))
+	{
+		printk("danube_eeprom_open fails\n");
+		goto out;
+	}
+
+	data = (unsigned int)IFX_SSC_MODE_RXTX;
+
+	if ((ret = ifx_ssc_ioctl((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
+	{
+		printk("set RXTX mode fails\n");
+		goto out;
+	}
+
+	if ((ret = eeprom_wrsr()))
+	{
+		printk("EEPROM reset fails\n");
+		goto out;
+	}
+
+	if ((ret = eeprom_read(addr, buf, len)))
+	{
+		printk("eeprom read fails\n");
+		goto out;
+	}
+
+out:
+	if (ifx_ssc_close((struct inode *) 0, NULL))
+		printk("danube_eeprom_close fails\n");
+
+	return len;
+}
+EXPORT_SYMBOL(danube_eeprom_read);
+
+static ssize_t
+danube_eeprom_fops_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
+{
+	int ret = 0;
+	unsigned char ssc_rx_buf[EEPROM_SIZE];
+	long flag;
+
+	if (*off >= EEPROM_SIZE)
+		return 0;
+
+	if (*off + len > EEPROM_SIZE)
+		len = EEPROM_SIZE - *off;
+
+	if (len == 0)
+		return 0;
+
+	local_irq_save(flag);
+
+	if ((ret = danube_eeprom_read(ssc_rx_buf, len, *off)) < 0)
+	{
+		printk("read fails, err=%x\n", ret);
+		local_irq_restore(flag);
+		return ret;
+	}
+
+	if (copy_to_user((void*)ubuf, ssc_rx_buf, ret) != 0)
+	{
+		local_irq_restore(flag);
+		ret = -EFAULT;
+	}
+
+	local_irq_restore(flag);
+	*off += len;
+
+	return len;
+}
+
+ssize_t
+danube_eeprom_write (char *buf, size_t len, unsigned int addr)
+{
+	int ret = 0;
+	unsigned int data;
+
+	if ((ret = ifx_ssc_open ((struct inode *) 0, NULL)))
+	{
+		printk ("danube_eeprom_open fails\n");
+		goto out;
+	}
+
+	data = (unsigned int) IFX_SSC_MODE_RXTX;
+
+	if ((ret = ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
+	{
+		printk ("set RXTX mode fails\n");
+		goto out;
+	}
+
+	if ((ret = eeprom_wrsr ())) {
+		printk ("EEPROM reset fails\n");
+		goto out;
+	}
+
+	if ((ret = eeprom_write (addr, buf, len))) {
+		printk ("eeprom write fails\n");
+		goto out;
+	}
+
+out:
+	if (ifx_ssc_close ((struct inode *) 0, NULL))
+		printk ("danube_eeprom_close fails\n");
+
+	return ret;
+}
+EXPORT_SYMBOL(danube_eeprom_write);
+
+static ssize_t
+danube_eeprom_fops_write (struct file *filp, const char *ubuf, size_t len, loff_t * off)
+{
+	int ret = 0;
+	unsigned char ssc_tx_buf[EEPROM_SIZE];
+
+	if (*off >= EEPROM_SIZE)
+		return 0;
+
+	if (len + *off > EEPROM_SIZE)
+		len = EEPROM_SIZE - *off;
+
+	if ((ret = copy_from_user (ssc_tx_buf, ubuf, len)))
+		return EFAULT;
+
+	ret = danube_eeprom_write (ssc_tx_buf, len, *off);
+
+	if (ret > 0)
+		*off = ret;
+
+	return ret;
+}
+
+loff_t
+danube_eeprom_llseek (struct file * filp, loff_t off, int whence)
+{
+	loff_t newpos;
+	switch (whence) {
+	case SEEK_SET:
+		newpos = off;
+		break;
+
+	case SEEK_CUR:
+		newpos = filp->f_pos + off;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	if (newpos < 0)
+		return -EINVAL;
+
+	filp->f_pos = newpos;
+
+	return newpos;
+}
+
+static struct file_operations danube_eeprom_fops = {
+      owner:THIS_MODULE,
+      llseek:danube_eeprom_llseek,
+      read:danube_eeprom_fops_read,
+      write:danube_eeprom_fops_write,
+      ioctl:danube_eeprom_ioctl,
+      open:danube_eeprom_open,
+      release:danube_eeprom_close,
+};
+
+int __init
+danube_eeprom_init (void)
+{
+	int ret = 0;
+
+	danube_eeprom_maj = register_chrdev(0, "eeprom", &danube_eeprom_fops);
+
+	if (danube_eeprom_maj < 0)
+	{
+		printk("failed to register eeprom device\n");
+		ret = -EINVAL;
+		
+		goto out;
+	}
+
+	printk("danube_eeprom : /dev/eeprom mayor %d\n", danube_eeprom_maj);
+
+out:
+	return ret;
+}
+
+void __exit
+danube_eeprom_cleanup_module (void)
+{
+	/*if (unregister_chrdev (danube_eeprom_maj, "eeprom")) {
+		printk ("Unable to unregister major %d for the EEPROM\n",
+			maj);
+	}*/
+}
+
+module_exit (danube_eeprom_cleanup_module);
+module_init (danube_eeprom_init);
+
+MODULE_LICENSE ("GPL");
+MODULE_AUTHOR ("Peng Liu");
+MODULE_DESCRIPTION ("IFAP EEPROM driver");
+MODULE_SUPPORTED_DEVICE ("danube_eeprom");
+
+
diff --git a/target/linux/ifxmips/files/drivers/char/danube_gpio.c b/target/linux/ifxmips/files/drivers/char/danube_gpio.c
new file mode 100644
index 0000000000..dbdb71e8fb
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/char/danube_gpio.c
@@ -0,0 +1,442 @@
+/*
+ *   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.
+ *
+ *   Copyright (C) 2005 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/ioctl.h>
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+#include <asm/danube/danube.h>
+#include <asm/danube/danube_ioctl.h>
+
+#define MAX_PORTS			2
+#define PINS_PER_PORT		16
+
+static unsigned int danube_gpio_major = 0;
+
+/* TODO do we need this ? */
+static struct semaphore port_sem;
+
+/* TODO do we really need this ? return in a define is forbidden by coding style */
+#define DANUBE_GPIO_SANITY		{if (port > MAX_PORTS || pin > PINS_PER_PORT) return -EINVAL; }
+
+int
+danube_port_reserve_pin (unsigned int port, unsigned int pin)
+{
+	DANUBE_GPIO_SANITY;
+	printk("%s : call to obseleted function\n", __func__);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_reserve_pin);
+
+int
+danube_port_free_pin (unsigned int port, unsigned int pin)
+{
+	DANUBE_GPIO_SANITY;
+	printk("%s : call to obseleted function\n", __func__);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_free_pin);
+
+int
+danube_port_set_open_drain (unsigned int port, unsigned int pin)
+{
+	DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_OD + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_OD);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_open_drain);
+
+int
+danube_port_clear_open_drain (unsigned int port, unsigned int pin)
+{
+	DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_OD + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_OD);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_open_drain);
+
+int
+danube_port_set_pudsel (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_PUDSEL + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_PUDSEL);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_pudsel);
+
+int
+danube_port_clear_pudsel (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_PUDSEL + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_PUDSEL);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_pudsel);
+
+int
+danube_port_set_puden (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_PUDEN + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_PUDEN);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_puden);
+
+int
+danube_port_clear_puden (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_PUDEN + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_PUDEN);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_puden);
+
+int
+danube_port_set_stoff (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_STOFF + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_STOFF);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_stoff);
+
+int
+danube_port_clear_stoff (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_STOFF + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_STOFF);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_stoff);
+
+int
+danube_port_set_dir_out (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_DIR + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_DIR);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_dir_out);
+
+int
+danube_port_set_dir_in (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_DIR + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_DIR);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_dir_in);
+
+int
+danube_port_set_output (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_OUT + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_OUT);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_output);
+
+int
+danube_port_clear_output (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_OUT + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_OUT);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_output);
+
+int
+danube_port_get_input (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+
+	if (readl(DANUBE_GPIO_P0_IN + (port * 0x30)) & (1 << pin))
+		return 0;
+	else
+		return 1;
+}
+EXPORT_SYMBOL(danube_port_get_input);
+
+int
+danube_port_set_altsel0 (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_ALTSEL0 + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_ALTSEL0);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_altsel0);
+
+int
+danube_port_clear_altsel0 (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_ALTSEL0 + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_ALTSEL0);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_altsel0);
+
+int
+danube_port_set_altsel1 (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_ALTSEL1 + (port * 0x30)) | (1 << pin), DANUBE_GPIO_P0_ALTSEL1);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_set_altsel1);
+
+int
+danube_port_clear_altsel1 (unsigned int port, unsigned int pin)
+{
+    DANUBE_GPIO_SANITY;
+	writel(readl(DANUBE_GPIO_P0_ALTSEL1 + (port * 0x30)) & ~(1 << pin), DANUBE_GPIO_P0_ALTSEL1);
+
+	return 0;
+}
+EXPORT_SYMBOL(danube_port_clear_altsel1);
+
+long danube_port_read_procmem_helper(char* tag, u32* in_reg, char *buf)
+{
+	u32 reg, bit = 0;
+	unsigned int len, t;
+
+	len = sprintf(buf, "\n%s: ", tag);
+	reg = readl(in_reg);
+	bit = 0x80000000;
+	for (t = 0; t < 32; t++) {
+		if ((reg & bit) > 0)
+			len = len + sprintf(buf + len, "X");
+		else
+			len = len + sprintf(buf + len, " ");
+		bit = bit >> 1;
+	}
+
+	return len;
+}
+
+int
+danube_port_read_procmem (char *buf, char **start, off_t offset, int count,
+			  int *eof, void *data)
+{
+	long len = sprintf (buf, "\nDanube Port Settings\n");
+
+	len += sprintf (buf + len,
+			"         3         2         1         0\n");
+	len += sprintf (buf + len,
+			"        10987654321098765432109876543210\n");
+	len += sprintf (buf + len,
+			"----------------------------------------\n");
+
+	len += danube_port_read_procmem_helper("P0-OUT", DANUBE_GPIO_P0_OUT, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-OUT", DANUBE_GPIO_P1_OUT, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-IN ", DANUBE_GPIO_P0_IN, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-IN ", DANUBE_GPIO_P1_IN, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-DIR", DANUBE_GPIO_P0_DIR, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-DIR", DANUBE_GPIO_P1_DIR, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-STO ", DANUBE_GPIO_P0_STOFF, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-STO ", DANUBE_GPIO_P1_STOFF, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-PUDE", DANUBE_GPIO_P0_PUDEN, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-PUDE", DANUBE_GPIO_P1_PUDEN, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-OD  ", DANUBE_GPIO_P0_OD, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-OD  ", DANUBE_GPIO_P1_OD, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-PUDS", DANUBE_GPIO_P0_PUDSEL, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-PUDS", DANUBE_GPIO_P1_PUDSEL, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-ALT0", DANUBE_GPIO_P0_ALTSEL0, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-ALT0", DANUBE_GPIO_P1_ALTSEL0, &buf[len]);
+	len += danube_port_read_procmem_helper("P0-ALT1", DANUBE_GPIO_P0_ALTSEL1, &buf[len]);
+	len += danube_port_read_procmem_helper("P1-ALT1", DANUBE_GPIO_P1_ALTSEL1, &buf[len]);
+	len = len + sprintf (buf + len, "\n\n");
+
+	*eof = 1;
+
+	return len;
+}
+
+static int
+danube_port_open (struct inode *inode, struct file *filep)
+{
+	return 0;
+}
+
+static int
+danube_port_release (struct inode *inode, struct file *filelp)
+{
+	return 0;
+}
+
+static int
+danube_port_ioctl (struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg)
+{
+	int ret = 0;
+	volatile struct danube_port_ioctl_parm parm;
+
+	if (_IOC_TYPE (cmd) != DANUBE_PORT_IOC_MAGIC)
+		return -EINVAL;
+
+	if (_IOC_DIR (cmd) & _IOC_WRITE) {
+		if (!access_ok
+		    (VERIFY_READ, arg,
+		     sizeof (struct danube_port_ioctl_parm)))
+			return -EFAULT;
+		ret = copy_from_user ((void *) &parm, (void *) arg,
+				      sizeof (struct danube_port_ioctl_parm));
+	}
+	if (_IOC_DIR (cmd) & _IOC_READ) {
+		if (!access_ok
+		    (VERIFY_WRITE, arg,
+		     sizeof (struct danube_port_ioctl_parm)))
+			return -EFAULT;
+	}
+
+	if (down_trylock (&port_sem) != 0)
+		return -EBUSY;
+
+	switch (cmd) {
+	case DANUBE_PORT_IOCOD:
+		if (parm.value == 0x00)
+			danube_port_clear_open_drain(parm.port, parm.pin);
+		else
+			danube_port_set_open_drain(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCPUDSEL:
+		if (parm.value == 0x00)
+			danube_port_clear_pudsel(parm.port, parm.pin);
+		else
+			danube_port_set_pudsel(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCPUDEN:
+		if (parm.value == 0x00)
+			danube_port_clear_puden(parm.port, parm.pin);
+		else
+			danube_port_set_puden(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCSTOFF:
+		if (parm.value == 0x00)
+			danube_port_clear_stoff(parm.port, parm.pin);
+		else
+			danube_port_set_stoff(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCDIR:
+		if (parm.value == 0x00)
+			danube_port_set_dir_in(parm.port, parm.pin);
+		else
+			danube_port_set_dir_out(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCOUTPUT:
+		if (parm.value == 0x00)
+			danube_port_clear_output(parm.port, parm.pin);
+		else
+			danube_port_set_output(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCALTSEL0:
+		if (parm.value == 0x00)
+			danube_port_clear_altsel0(parm.port, parm.pin);
+		else
+			danube_port_set_altsel0(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCALTSEL1:
+		if (parm.value == 0x00)
+			danube_port_clear_altsel1(parm.port, parm.pin);
+		else
+			danube_port_set_altsel1(parm.port, parm.pin);
+		break;
+
+	case DANUBE_PORT_IOCINPUT:
+		parm.value = danube_port_get_input(parm.port, parm.pin);
+		copy_to_user((void*)arg, (void*)&parm,
+			sizeof(struct danube_port_ioctl_parm));
+		break;
+
+	default:
+		ret = -EINVAL;
+	}
+
+	up (&port_sem);
+
+	return ret;
+}
+
+static struct file_operations port_fops = {
+      .open = danube_port_open,
+      .release = danube_port_release,
+      .ioctl = danube_port_ioctl
+};
+
+int __init
+danube_gpio_init (void)
+{
+	int retval = 0;
+
+	sema_init (&port_sem, 1);
+
+	danube_gpio_major = register_chrdev(0, "danube_gpio", &port_fops);
+	if (!danube_gpio_major)
+	{
+		printk("danube-port: Error! Could not register port device. #%d\n", danube_gpio_major);
+		retval = -EINVAL;
+		goto out;
+	}
+
+	create_proc_read_entry("danube_gpio", 0, NULL,
+				danube_port_read_procmem, NULL);
+
+	printk("registered danube gpio driver\n");
+
+out:
+	return retval;
+}
+
+void __exit
+danube_gpio_exit (void)
+{
+	unregister_chrdev(danube_gpio_major, "danube_gpio");
+	remove_proc_entry("danube_gpio", NULL);
+}
+
+module_init(danube_gpio_init);
+module_exit(danube_gpio_exit);
diff --git a/target/linux/ifxmips/files/drivers/char/danube_led.c b/target/linux/ifxmips/files/drivers/char/danube_led.c
new file mode 100644
index 0000000000..86a92d5999
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/char/danube_led.c
@@ -0,0 +1,197 @@
+/*
+ *   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.
+ *
+ *   Copyright (C) 2006 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <linux/errno.h>
+#include <asm/danube/danube.h>
+#include <asm/danube/danube_gpio.h>
+#include <asm/danube/danube_pmu.h>
+
+#define DANUBE_LED_CLK_EDGE				DANUBE_LED_FALLING
+//#define DANUBE_LED_CLK_EDGE			DANUBE_LED_RISING
+
+#define DANUBE_LED_SPEED				DANUBE_LED_8HZ
+
+#define DANUBE_LED_GPIO_PORT	0
+
+static int danube_led_major;
+
+void
+danube_led_set (unsigned int led)
+{
+	led &= 0xffffff;
+	writel(readl(DANUBE_LED_CPU0) | led, DANUBE_LED_CPU0);
+}
+EXPORT_SYMBOL(danube_led_set);
+
+void
+danube_led_clear (unsigned int led)
+{
+	led = ~(led & 0xffffff);
+	writel(readl(DANUBE_LED_CPU0) & led, DANUBE_LED_CPU0);
+}
+EXPORT_SYMBOL(danube_led_clear);
+
+void
+danube_led_blink_set (unsigned int led)
+{
+	led &= 0xffffff;
+	writel(readl(DANUBE_LED_CON0) | led, DANUBE_LED_CON0);
+}
+EXPORT_SYMBOL(danube_led_blink_set);
+
+void
+danube_led_blink_clear (unsigned int led)
+{
+	led = ~(led & 0xffffff);
+	writel(readl(DANUBE_LED_CON0) & led, DANUBE_LED_CON0);
+}
+EXPORT_SYMBOL(danube_led_blink_clear);
+
+void
+danube_led_setup_gpio (void)
+{
+	int i = 0;
+
+	/* we need to setup pins SH,D,ST (4,5,6) */
+	for (i = 4; i < 7; i++)
+	{
+		danube_port_set_altsel0(DANUBE_LED_GPIO_PORT, i);
+		danube_port_clear_altsel1(DANUBE_LED_GPIO_PORT, i);
+		danube_port_set_dir_out(DANUBE_LED_GPIO_PORT, i);
+		danube_port_set_open_drain(DANUBE_LED_GPIO_PORT, i);
+	}
+}
+
+static int
+led_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int ret = -EINVAL;
+
+	switch ( cmd )
+	{
+	}
+
+	return ret;
+}
+
+static int
+led_open (struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static int
+led_release (struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static struct file_operations danube_led_fops = {
+	.owner = THIS_MODULE,
+	.ioctl = led_ioctl,
+	.open = led_open,
+	.release = led_release
+};
+
+
+/*
+Map for LED on reference board
+	WLAN_READ     LED11   OUT1    15
+	WARNING       LED12   OUT2    14
+	FXS1_LINK     LED13   OUT3    13
+	FXS2_LINK     LED14   OUT4    12
+	FXO_ACT       LED15   OUT5    11
+	USB_LINK      LED16   OUT6    10
+	ADSL2_LINK    LED19   OUT7    9
+	BT_LINK       LED17   OUT8    8
+	SD_LINK       LED20   OUT9    7
+	ADSL2_TRAFFIC LED31   OUT16   0
+Map for hardware relay on reference board
+	USB Power On          OUT11   5
+	RELAY                 OUT12   4
+*/
+
+
+int __init
+danube_led_init (void)
+{
+	int ret = 0;
+
+	danube_led_setup_gpio();
+
+	writel(0, DANUBE_LED_AR);
+	writel(0, DANUBE_LED_CPU0);
+	writel(0, DANUBE_LED_CPU1);
+	writel(LED_CON0_SWU, DANUBE_LED_CON0);
+	writel(0, DANUBE_LED_CON1);
+
+	/* setup the clock edge that the shift register is triggered on */
+	writel(readl(DANUBE_LED_CON0) & ~DANUBE_LED_EDGE_MASK, DANUBE_LED_CON0);
+	writel(readl(DANUBE_LED_CON0) | DANUBE_LED_CLK_EDGE, DANUBE_LED_CON0);
+
+	/* per default leds 15-0 are set */
+	writel(DANUBE_LED_GROUP1 | DANUBE_LED_GROUP0, DANUBE_LED_CON1);
+
+	/* leds are update periodically by the FPID */
+	writel(readl(DANUBE_LED_CON1) & ~DANUBE_LED_UPD_MASK, DANUBE_LED_CON1);
+	writel(readl(DANUBE_LED_CON1) | DANUBE_LED_UPD_SRC_FPI, DANUBE_LED_CON1);
+
+	/* set led update speed */
+	writel(readl(DANUBE_LED_CON1) & ~DANUBE_LED_MASK, DANUBE_LED_CON1);
+	writel(readl(DANUBE_LED_CON1) | DANUBE_LED_SPEED, DANUBE_LED_CON1);
+
+	/* adsl 0 and 1 leds are updated by the arc */
+	writel(readl(DANUBE_LED_CON0) | DANUBE_LED_ADSL_SRC, DANUBE_LED_CON0);
+
+	/* per default, the leds are turned on */
+	danube_pmu_enable(DANUBE_PMU_PWDCR_LED);
+
+	danube_led_major = register_chrdev(0, "danube_led", &danube_led_fops);
+
+	if (!danube_led_major)
+	{
+		printk("danube_led: Error! Could not register device. %d\n", danube_led_major);
+		ret = -EINVAL;
+
+		goto out;
+	}
+
+	printk(KERN_INFO "danube_led : device registered on major %d\n", danube_led_major);
+
+out:
+	return ret;
+}
+
+void __exit
+danube_led_exit (void)
+{
+	unregister_chrdev(danube_led_major, "danube_led");
+}
+
+module_init(danube_led_init);
+module_exit(danube_led_exit);
diff --git a/target/linux/ifxmips/files/drivers/char/danube_ssc.c b/target/linux/ifxmips/files/drivers/char/danube_ssc.c
new file mode 100644
index 0000000000..1f90dac595
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/char/danube_ssc.c
@@ -0,0 +1,1533 @@
+/*
+ *   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.
+ *
+ *   Copyright (C) 2006 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ *
+ */
+
+// ### TO DO: general issues:
+//            - power management
+//            - interrupt handling (direct/indirect)
+//            - pin/mux-handling (just overall concept due to project dependency)
+//            - multiple instances capability
+//            - slave functionality
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+
+#include <asm/danube/danube.h>
+#include <asm/danube/danube_irq.h>
+#include <asm/danube/ifx_ssc_defines.h>
+#include <asm/danube/ifx_ssc.h>
+
+#ifdef SSC_FRAME_INT_ENABLE
+#undef SSC_FRAME_INT_ENABLE
+#endif
+
+#define not_yet
+
+#define SPI_VINETIC
+
+
+
+/* allow the user to set the major device number */
+static int maj = 0;
+
+/*
+ * This is the per-channel data structure containing pointers, flags
+ * and variables for the port. This driver supports a maximum of PORT_CNT.
+ * isp is allocated in ifx_ssc_init() based on the chip version.
+ */
+static struct ifx_ssc_port *isp;
+
+/* prototypes for fops */
+static ssize_t ifx_ssc_read (struct file *, char *, size_t, loff_t *);
+static ssize_t ifx_ssc_write (struct file *, const char *, size_t, loff_t *);
+//static unsigned int ifx_ssc_poll(struct file *, struct poll_table_struct *);
+int ifx_ssc_ioctl (struct inode *, struct file *, unsigned int,
+		   unsigned long);
+int ifx_ssc_open (struct inode *, struct file *);
+int ifx_ssc_close (struct inode *, struct file *);
+
+/* other forward declarations */
+static unsigned int ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info);
+static void tx_int (struct ifx_ssc_port *);
+static int ifx_ssc1_read_proc (char *, char **, off_t, int, int *, void *);
+
+extern unsigned int danube_get_fpi_hz (void);
+extern void mask_and_ack_danube_irq (unsigned int irq_nr);
+
+static struct file_operations ifx_ssc_fops = {
+      .owner = THIS_MODULE,
+      .read = ifx_ssc_read,
+      .write = ifx_ssc_write,
+      .ioctl = ifx_ssc_ioctl,
+      .open = ifx_ssc_open,
+      .release = ifx_ssc_close,
+};
+
+static inline unsigned int
+ifx_ssc_get_kernel_clk (struct ifx_ssc_port *info)
+{
+	unsigned int rmc;
+
+	rmc = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CLC) & IFX_CLC_RUN_DIVIDER_MASK) >> IFX_CLC_RUN_DIVIDER_OFFSET;
+	if (rmc == 0)
+	{
+		printk ("ifx_ssc_get_kernel_clk rmc==0 \n");
+		return 0;
+	}
+	return danube_get_fpi_hz () / rmc;
+}
+
+#ifndef not_yet
+#ifdef IFX_SSC_INT_USE_BH
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver
+ * (also known as the "bottom half").  This can be called any
+ * number of times for any channel without harm.
+ */
+static inline void
+ifx_ssc_sched_event (struct ifx_ssc_port *info, int event)
+{
+	info->event |= 1 << event;	/* remember what kind of event and who */
+	queue_task (&info->tqueue, &tq_cyclades);	/* it belongs to */
+	mark_bh (CYCLADES_BH);	/* then trigger event */
+}
+
+static void
+do_softint (void *private_)
+{
+	struct ifx_ssc_port *info = (struct ifx_ssc_port *) private_;
+
+	if (test_and_clear_bit (Cy_EVENT_HANGUP, &info->event))
+	{
+		wake_up_interruptible (&info->open_wait);
+		info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
+	}
+
+	if (test_and_clear_bit (Cy_EVENT_OPEN_WAKEUP, &info->event))
+		wake_up_interruptible (&info->open_wait);
+
+	if (test_and_clear_bit (Cy_EVENT_DELTA_WAKEUP, &info->event))
+		wake_up_interruptible (&info->delta_msr_wait);
+
+	if (test_and_clear_bit (Cy_EVENT_WRITE_WAKEUP, &info->event))
+		wake_up_interruptible (&tty->write_wait);
+#ifdef Z_WAKE
+	if (test_and_clear_bit (Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
+		wake_up_interruptible (&info->shutdown_wait);
+#endif
+}
+#endif
+#endif
+
+inline static void
+rx_int (struct ifx_ssc_port *info)
+{
+	int fifo_fill_lev, bytes_in_buf, i;
+	unsigned long tmp_val;
+	unsigned long *tmp_ptr;
+	unsigned int rx_valid_cnt;
+	/* number of words waiting in the RX FIFO */
+	fifo_fill_lev = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_FSTAT) & IFX_SSC_FSTAT_RECEIVED_WORDS_MASK) >> IFX_SSC_FSTAT_RECEIVED_WORDS_OFFSET;
+	// Note: There are always 32 bits in a fifo-entry except for the last 
+	// word of a contigous transfer block and except for not in rx-only 
+	// mode and CON.ENBV set. But for this case it should be a convention 
+	// in software which helps:
+	// In tx or rx/tx mode all transfers from the buffer to the FIFO are 
+	// 32-bit wide, except for the last three bytes, which could be a 
+	// combination of 16- and 8-bit access.
+	// => The whole block is received as 32-bit words as a contigous stream, 
+	// even if there was a gap in tx which has the fifo run out of data! 
+	// Just the last fifo entry *may* be partially filled (0, 1, 2 or 3 bytes)!
+
+	/* free space in the RX buffer */
+	bytes_in_buf = info->rxbuf_end - info->rxbuf_ptr;
+	// transfer with 32 bits per entry
+	while ((bytes_in_buf >= 4) && (fifo_fill_lev > 0)) {
+		tmp_ptr = (unsigned long *) info->rxbuf_ptr;
+		*tmp_ptr = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
+		info->rxbuf_ptr += 4;
+		info->stats.rxBytes += 4;
+		fifo_fill_lev--;
+		bytes_in_buf -= 4;
+	}
+
+	// now do the rest as mentioned in STATE.RXBV
+	while ((bytes_in_buf > 0) && (fifo_fill_lev > 0)) {
+		rx_valid_cnt = (READ_PERIPHERAL_REGISTER(info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_RX_BYTE_VALID_MASK) >> IFX_SSC_STATE_RX_BYTE_VALID_OFFSET;
+		if (rx_valid_cnt == 0)
+			break;
+
+		if (rx_valid_cnt > bytes_in_buf)
+			rx_valid_cnt = bytes_in_buf;
+
+		tmp_val = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RB);
+
+		for (i = 0; i < rx_valid_cnt; i++)
+		{
+			*info->rxbuf_ptr = (tmp_val >> (8 * (rx_valid_cnt - i - 1))) & 0xff;
+			bytes_in_buf--;
+			info->rxbuf_ptr++;
+		}
+		info->stats.rxBytes += rx_valid_cnt;
+	}
+
+	// check if transfer is complete
+	if (info->rxbuf_ptr >= info->rxbuf_end)
+	{
+		disable_irq(info->rxirq);
+		wake_up_interruptible (&info->rwait);
+	} else if ((info->opts.modeRxTx == IFX_SSC_MODE_RX) && (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) == 0))
+	{
+		if (info->rxbuf_end - info->rxbuf_ptr < IFX_SSC_RXREQ_BLOCK_SIZE)
+			WRITE_PERIPHERAL_REGISTER ((info->rxbuf_end - info->rxbuf_ptr) << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
+		else
+			WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET,  info->mapbase + IFX_SSC_RXREQ);
+	}
+}
+
+inline static void
+tx_int (struct ifx_ssc_port *info)
+{
+
+	int fifo_space, fill, i;
+	fifo_space = ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_ID) & IFX_SSC_PERID_TXFS_MASK) >> IFX_SSC_PERID_TXFS_OFFSET)
+		- ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_FSTAT) & IFX_SSC_FSTAT_TRANSMIT_WORDS_MASK) >> IFX_SSC_FSTAT_TRANSMIT_WORDS_OFFSET);
+
+	if (fifo_space == 0)
+		return;
+
+	fill = info->txbuf_end - info->txbuf_ptr;
+
+	if (fill > fifo_space * 4)
+		fill = fifo_space * 4;
+
+	for (i = 0; i < fill / 4; i++)
+	{
+		// at first 32 bit access
+		WRITE_PERIPHERAL_REGISTER (*(UINT32 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
+		info->txbuf_ptr += 4;
+	}
+
+	fifo_space -= fill / 4;
+	info->stats.txBytes += fill & ~0x3;
+	fill &= 0x3;
+	if ((fifo_space > 0) & (fill > 1))
+	{
+		// trailing 16 bit access
+		WRITE_PERIPHERAL_REGISTER_16 (*(UINT16 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
+		info->txbuf_ptr += 2;
+		info->stats.txBytes += 2;
+		fifo_space--;
+		fill -= 2;
+	}
+
+	if ((fifo_space > 0) & (fill > 0))
+	{
+		// trailing 8 bit access
+		WRITE_PERIPHERAL_REGISTER_8 (*(UINT8 *) info->txbuf_ptr, info->mapbase + IFX_SSC_TB);
+		info->txbuf_ptr++;
+		info->stats.txBytes++;
+	}
+
+	// check if transmission complete
+	if (info->txbuf_ptr >= info->txbuf_end)
+	{
+		disable_irq(info->txirq);
+		kfree (info->txbuf);
+		info->txbuf = NULL;
+	}
+
+}
+
+irqreturn_t
+ifx_ssc_rx_int (int irq, void *dev_id)
+{
+	struct ifx_ssc_port *info = (struct ifx_ssc_port *) dev_id;
+	rx_int (info);
+
+	return IRQ_HANDLED;
+}
+
+irqreturn_t
+ifx_ssc_tx_int (int irq, void *dev_id)
+{
+	struct ifx_ssc_port *info = (struct ifx_ssc_port *) dev_id;
+	tx_int (info);
+
+	return IRQ_HANDLED;
+}
+
+irqreturn_t
+ifx_ssc_err_int (int irq, void *dev_id)
+{
+	struct ifx_ssc_port *info = (struct ifx_ssc_port *) dev_id;
+	unsigned int state;
+	unsigned int write_back = 0;
+	unsigned long flags;
+
+	local_irq_save (flags);
+	state = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE);
+
+	if ((state & IFX_SSC_STATE_RX_UFL) != 0) {
+		info->stats.rxUnErr++;
+		write_back |= IFX_SSC_WHBSTATE_CLR_RX_UFL_ERROR;
+	}
+
+	if ((state & IFX_SSC_STATE_RX_OFL) != 0) {
+		info->stats.rxOvErr++;
+		write_back |= IFX_SSC_WHBSTATE_CLR_RX_OFL_ERROR;
+	}
+
+	if ((state & IFX_SSC_STATE_TX_OFL) != 0) {
+		info->stats.txOvErr++;
+		write_back |= IFX_SSC_WHBSTATE_CLR_TX_OFL_ERROR;
+	}
+
+	if ((state & IFX_SSC_STATE_TX_UFL) != 0) {
+		info->stats.txUnErr++;
+		write_back |= IFX_SSC_WHBSTATE_CLR_TX_UFL_ERROR;
+	}
+
+	if ((state & IFX_SSC_STATE_MODE_ERR) != 0) {
+		info->stats.modeErr++;
+		write_back |= IFX_SSC_WHBSTATE_CLR_MODE_ERROR;
+	}
+
+	if (write_back)
+		WRITE_PERIPHERAL_REGISTER (write_back, info->mapbase + IFX_SSC_WHBSTATE);
+
+	local_irq_restore (flags);
+
+	return IRQ_HANDLED;
+}
+
+static void
+ifx_ssc_abort (struct ifx_ssc_port *info)
+{
+	unsigned long flags;
+	bool enabled;
+
+	local_irq_save (flags);
+
+	disable_irq(info->rxirq);
+	disable_irq(info->txirq);
+	disable_irq(info->errirq);
+
+	local_irq_restore (flags);
+
+	// disable SSC (also aborts a receive request!)
+	// ### TO DO: Perhaps it's better to abort after the receiption of a 
+	// complete word. The disable cuts the transmission immediatly and 
+	// releases the chip selects. This could result in unpredictable 
+	// behavior of connected external devices!
+	enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED) != 0;
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	// flush fifos
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH, info->mapbase + IFX_SSC_TXFCON);
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_XFCON_FIFO_FLUSH, info->mapbase + IFX_SSC_RXFCON);
+
+	// free txbuf
+	if (info->txbuf != NULL)
+	{
+		kfree (info->txbuf);
+		info->txbuf = NULL;
+	}
+
+	// wakeup read process
+	if (info->rxbuf != NULL)
+		wake_up_interruptible (&info->rwait);
+
+	// clear pending int's 
+	mask_and_ack_danube_irq(info->rxirq);
+	mask_and_ack_danube_irq(info->txirq);
+	mask_and_ack_danube_irq(info->errirq);
+
+	// clear error flags
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
+
+	if (enabled)
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+}
+
+/*
+ * This routine is called whenever a port is opened.  It enforces
+ * exclusive opening of a port and enables interrupts, etc.
+ */
+int
+ifx_ssc_open (struct inode *inode, struct file *filp)
+{
+	struct ifx_ssc_port *info;
+	int line;
+	int from_kernel = 0;
+
+	if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1)) {
+		from_kernel = 1;
+		line = (int) inode;
+	} else {
+		line = MINOR (filp->f_dentry->d_inode->i_rdev);
+		filp->f_op = &ifx_ssc_fops;
+	}
+
+	/* don't open more minor devices than we can support */
+	if (line < 0 || line >= PORT_CNT)
+		return -ENXIO;
+
+	info = &isp[line];
+
+	/* exclusive open */
+	if (info->port_is_open != 0)
+		return -EBUSY;
+	info->port_is_open++;
+
+	disable_irq(info->rxirq);
+	disable_irq(info->txirq);
+	disable_irq(info->errirq);
+
+	/* Flush and enable TX/RX FIFO */
+	WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, info->mapbase + IFX_SSC_TXFCON);
+	WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_FLUSH | IFX_SSC_XFCON_FIFO_ENABLE, info->mapbase + IFX_SSC_RXFCON);
+
+	/* logically flush the software FIFOs */
+	info->rxbuf_ptr = 0;
+	info->txbuf_ptr = 0;
+
+	/* clear all error bits */
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ALL_ERROR, info->mapbase + IFX_SSC_WHBSTATE);
+
+	// clear pending interrupts
+	mask_and_ack_danube_irq(info->rxirq);
+	mask_and_ack_danube_irq(info->txirq);
+	mask_and_ack_danube_irq(info->errirq);
+
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	return 0;
+}
+EXPORT_SYMBOL(ifx_ssc_open);
+
+int
+ifx_ssc_close (struct inode *inode, struct file *filp)
+{
+	struct ifx_ssc_port *info;
+	int idx;
+
+	if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1))
+		idx = (int) inode;
+	else
+		idx = MINOR (filp->f_dentry->d_inode->i_rdev);
+
+	if (idx < 0 || idx >= PORT_CNT)
+		return -ENXIO;
+
+	info = &isp[idx];
+	if (!info)
+		return -ENXIO;
+
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	ifx_ssc_abort(info);
+
+	info->port_is_open--;
+
+	return 0;
+}
+EXPORT_SYMBOL(ifx_ssc_close);
+
+static ssize_t
+ifx_ssc_read_helper_poll (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel)
+{
+	ssize_t ret_val;
+	unsigned long flags;
+
+	if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
+		return -EFAULT;
+	local_irq_save (flags);
+	info->rxbuf_ptr = info->rxbuf;
+	info->rxbuf_end = info->rxbuf + len;
+	local_irq_restore (flags);
+	/* Vinetic driver always works in IFX_SSC_MODE_RXTX */
+	/* TXRX in poll mode */
+	while (info->rxbuf_ptr < info->rxbuf_end)
+	{
+		if (info->txbuf_ptr < info->txbuf_end)
+			tx_int (info);
+
+		rx_int (info);
+	};
+
+	ret_val = info->rxbuf_ptr - info->rxbuf;
+
+	return ret_val;
+}
+
+static ssize_t
+ifx_ssc_read_helper (struct ifx_ssc_port *info, char *buf, size_t len, int from_kernel)
+{
+	ssize_t ret_val;
+	unsigned long flags;
+	DECLARE_WAITQUEUE (wait, current);
+
+	if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
+		return -EFAULT;
+
+	local_irq_save (flags);
+	info->rxbuf_ptr = info->rxbuf;
+	info->rxbuf_end = info->rxbuf + len;
+
+	if (info->opts.modeRxTx == IFX_SSC_MODE_RXTX)
+	{
+		if ((info->txbuf == NULL) || (info->txbuf != info->txbuf_ptr) || (info->txbuf_end != len + info->txbuf))
+		{
+			local_irq_restore (flags);
+			printk ("IFX SSC - %s: write must be called before calling " "read in combined RX/TX!\n", __func__);
+			return -EFAULT;
+		}
+
+		local_irq_restore(flags);
+		tx_int (info);
+
+		if (info->txbuf_ptr < info->txbuf_end)
+			enable_irq(info->txirq);
+
+		enable_irq(info->rxirq);
+	} else {
+		local_irq_restore(flags);
+		if (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK)
+			return -EBUSY;
+		enable_irq(info->rxirq);
+		if (len < IFX_SSC_RXREQ_BLOCK_SIZE)
+			WRITE_PERIPHERAL_REGISTER (len << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
+		else
+			WRITE_PERIPHERAL_REGISTER (IFX_SSC_RXREQ_BLOCK_SIZE << IFX_SSC_RXREQ_RXCOUNT_OFFSET, info->mapbase + IFX_SSC_RXREQ);
+	}
+
+	__add_wait_queue (&info->rwait, &wait);
+	set_current_state (TASK_INTERRUPTIBLE);
+
+	do {
+		local_irq_save (flags);
+		if (info->rxbuf_ptr >= info->rxbuf_end)
+			break;
+
+		local_irq_restore (flags);
+
+		if (signal_pending (current))
+		{
+			ret_val = -ERESTARTSYS;
+			goto out;
+		}
+		schedule();
+	} while (1);
+
+	ret_val = info->rxbuf_ptr - info->rxbuf;
+	local_irq_restore (flags);
+
+out:
+	current->state = TASK_RUNNING;
+	__remove_wait_queue (&info->rwait, &wait);
+
+	return (ret_val);
+}
+
+static ssize_t
+ifx_ssc_write_helper (struct ifx_ssc_port *info, const char *buf,
+		      size_t len, int from_kernel)
+{
+	if (info->opts.modeRxTx == IFX_SSC_MODE_RX)
+		return -EFAULT;
+
+	info->txbuf_ptr = info->txbuf;
+	info->txbuf_end = len + info->txbuf;
+	if (info->opts.modeRxTx == IFX_SSC_MODE_TX)
+	{
+		tx_int (info);
+		if (info->txbuf_ptr < info->txbuf_end)
+		{
+			enable_irq(info->txirq);
+		}
+	}
+
+	return len;
+}
+
+ssize_t
+ifx_ssc_kread (int port, char *kbuf, size_t len)
+{
+	struct ifx_ssc_port *info;
+	ssize_t ret_val;
+
+	if (port < 0 || port >= PORT_CNT)
+		return -ENXIO;
+
+	if (len == 0)
+		return 0;
+
+	info = &isp[port];
+
+	if (info->rxbuf != NULL)
+	{
+		printk ("SSC device busy\n");
+		return -EBUSY;
+	}
+
+	info->rxbuf = kbuf;
+	if (info->rxbuf == NULL)
+	{
+		printk ("SSC device error\n");
+		return -EINVAL;
+	}
+
+	ret_val = ifx_ssc_read_helper_poll (info, kbuf, len, 1);
+	info->rxbuf = NULL;
+
+	disable_irq(info->rxirq);
+
+	return ret_val;
+}
+EXPORT_SYMBOL(ifx_ssc_kread);
+
+ssize_t
+ifx_ssc_kwrite (int port, const char *kbuf, size_t len)
+{
+	struct ifx_ssc_port *info;
+	ssize_t ret_val;
+
+	if (port < 0 || port >= PORT_CNT)
+		return -ENXIO;
+
+	if (len == 0)
+		return 0;
+
+	info = &isp[port];
+
+	// check if transmission in progress
+	if (info->txbuf != NULL)
+		return -EBUSY;
+
+	info->txbuf = (char *) kbuf;
+
+	ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 1);
+
+	if (ret_val < 0)
+		info->txbuf = NULL;
+
+	return ret_val;
+}
+EXPORT_SYMBOL(ifx_ssc_kwrite);
+
+static ssize_t
+ifx_ssc_read (struct file *filp, char *ubuf, size_t len, loff_t * off)
+{
+	ssize_t ret_val;
+	int idx;
+	struct ifx_ssc_port *info;
+
+	idx = MINOR (filp->f_dentry->d_inode->i_rdev);
+	info = &isp[idx];
+
+	if (info->rxbuf != NULL)
+		return -EBUSY;
+
+	info->rxbuf = kmalloc (len + 3, GFP_KERNEL);
+	if (info->rxbuf == NULL)
+		return -ENOMEM;
+
+	ret_val = ifx_ssc_read_helper (info, info->rxbuf, len, 0);
+	if (copy_to_user ((void *) ubuf, info->rxbuf, ret_val) != 0)
+		ret_val = -EFAULT;
+
+	disable_irq(info->rxirq);
+
+	kfree (info->rxbuf);
+	info->rxbuf = NULL;
+
+	return (ret_val);
+}
+
+static ssize_t
+ifx_ssc_write (struct file *filp, const char *ubuf, size_t len, loff_t * off)
+{
+	int idx;
+	struct ifx_ssc_port *info;
+	int ret_val;
+
+	if (len == 0)
+		return (0);
+
+	idx = MINOR (filp->f_dentry->d_inode->i_rdev);
+	info = &isp[idx];
+
+	if (info->txbuf != NULL)
+		return -EBUSY;
+
+	info->txbuf = kmalloc (len + 3, GFP_KERNEL);
+	if (info->txbuf == NULL)
+		return -ENOMEM;
+
+	ret_val = copy_from_user (info->txbuf, ubuf, len);
+	if (ret_val == 0)
+		ret_val = ifx_ssc_write_helper (info, info->txbuf, len, 0);
+	else
+		ret_val = -EFAULT;
+
+	if (ret_val < 0)
+	{
+		kfree (info->txbuf);
+		info->txbuf = NULL;
+	}
+
+	return (ret_val);
+}
+
+static struct ifx_ssc_frm_status *
+ifx_ssc_frm_status_get (struct ifx_ssc_port *info)
+{
+	unsigned long tmp;
+
+	tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFSTAT);
+	info->frm_status.DataBusy = (tmp & IFX_SSC_SFSTAT_IN_DATA) > 0;
+	info->frm_status.PauseBusy = (tmp & IFX_SSC_SFSTAT_IN_PAUSE) > 0;
+	info->frm_status.DataCount = (tmp & IFX_SSC_SFSTAT_DATA_COUNT_MASK) >> IFX_SSC_SFSTAT_DATA_COUNT_OFFSET;
+	info->frm_status.PauseCount = (tmp & IFX_SSC_SFSTAT_PAUSE_COUNT_MASK) >> IFX_SSC_SFSTAT_PAUSE_COUNT_OFFSET;
+	tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON);
+	info->frm_status.EnIntAfterData = (tmp & IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE) > 0;
+	info->frm_status.EnIntAfterPause = (tmp & IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE) > 0;
+
+	return &info->frm_status;
+}
+
+
+static struct ifx_ssc_frm_opts *
+ifx_ssc_frm_control_get (struct ifx_ssc_port *info)
+{
+	unsigned long tmp;
+
+	tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON);
+	info->frm_opts.FrameEnable = (tmp & IFX_SSC_SFCON_SF_ENABLE) > 0;
+	info->frm_opts.DataLength = (tmp & IFX_SSC_SFCON_DATA_LENGTH_MASK) >> IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
+	info->frm_opts.PauseLength = (tmp & IFX_SSC_SFCON_PAUSE_LENGTH_MASK) >> IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
+	info->frm_opts.IdleData = (tmp & IFX_SSC_SFCON_PAUSE_DATA_MASK) >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
+	info->frm_opts.IdleClock = (tmp & IFX_SSC_SFCON_PAUSE_CLOCK_MASK) >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
+	info->frm_opts.StopAfterPause = (tmp & IFX_SSC_SFCON_STOP_AFTER_PAUSE) > 0;
+
+	return &info->frm_opts;
+}
+
+static int
+ifx_ssc_frm_control_set (struct ifx_ssc_port *info)
+{
+	unsigned long tmp;
+
+	// check parameters
+	if ((info->frm_opts.DataLength > IFX_SSC_SFCON_DATA_LENGTH_MAX)
+	    || (info->frm_opts.DataLength < 1)
+	    || (info->frm_opts.PauseLength > IFX_SSC_SFCON_PAUSE_LENGTH_MAX)
+	    || (info->frm_opts.PauseLength < 1)
+	    || (info->frm_opts.IdleData & ~(IFX_SSC_SFCON_PAUSE_DATA_MASK >> IFX_SSC_SFCON_PAUSE_DATA_OFFSET))
+	    || (info->frm_opts.IdleClock & ~(IFX_SSC_SFCON_PAUSE_CLOCK_MASK >> IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET)))
+		return -EINVAL;
+
+	// read interrupt bits (they're not changed here)
+	tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_SFCON) &
+		(IFX_SSC_SFCON_FIR_ENABLE_BEFORE_PAUSE | IFX_SSC_SFCON_FIR_ENABLE_AFTER_PAUSE);
+
+	// set all values with respect to it's bit position (for data and pause 
+	// length set N-1)
+	tmp = (info->frm_opts.DataLength - 1) << IFX_SSC_SFCON_DATA_LENGTH_OFFSET;
+	tmp |= (info->frm_opts.PauseLength - 1) << IFX_SSC_SFCON_PAUSE_LENGTH_OFFSET;
+	tmp |= info->frm_opts.IdleData << IFX_SSC_SFCON_PAUSE_DATA_OFFSET;
+	tmp |= info->frm_opts.IdleClock << IFX_SSC_SFCON_PAUSE_CLOCK_OFFSET;
+	tmp |= info->frm_opts.FrameEnable * IFX_SSC_SFCON_SF_ENABLE;
+	tmp |= info->frm_opts.StopAfterPause * IFX_SSC_SFCON_STOP_AFTER_PAUSE;
+
+	WRITE_PERIPHERAL_REGISTER(tmp, info->mapbase + IFX_SSC_SFCON);
+
+	return 0;
+}
+
+static int
+ifx_ssc_rxtx_mode_set (struct ifx_ssc_port *info, unsigned int val)
+{
+	unsigned long tmp;
+
+	if (!(info) || (val & ~(IFX_SSC_MODE_MASK)))
+		return -EINVAL;
+
+	if ((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_BUSY)
+	    || (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_RXCNT) & IFX_SSC_RXCNT_TODO_MASK))
+		return -EBUSY;
+
+	tmp = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CON) & ~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF)) | (val);
+	WRITE_PERIPHERAL_REGISTER (tmp, info->mapbase + IFX_SSC_CON);
+	info->opts.modeRxTx = val;
+
+	return 0;
+}
+
+static int
+ifx_ssc_sethwopts (struct ifx_ssc_port *info)
+{
+	unsigned long flags, bits;
+	struct ifx_ssc_hwopts *opts = &info->opts;
+
+	if ((opts->dataWidth < IFX_SSC_MIN_DATA_WIDTH)
+	    || (opts->dataWidth > IFX_SSC_MAX_DATA_WIDTH))
+		return -EINVAL;
+
+	bits = (opts->dataWidth - 1) << IFX_SSC_CON_DATA_WIDTH_OFFSET;
+	bits |= IFX_SSC_CON_ENABLE_BYTE_VALID;
+
+	if (opts->rxOvErrDetect)
+		bits |= IFX_SSC_CON_RX_OFL_CHECK;
+	if (opts->rxUndErrDetect)
+		bits |= IFX_SSC_CON_RX_UFL_CHECK;
+	if (opts->txOvErrDetect)
+		bits |= IFX_SSC_CON_TX_OFL_CHECK;
+	if (opts->txUndErrDetect)
+		bits |= IFX_SSC_CON_TX_UFL_CHECK;
+	if (opts->loopBack)
+		bits |= IFX_SSC_CON_LOOPBACK_MODE;
+	if (opts->echoMode)
+		bits |= IFX_SSC_CON_ECHO_MODE_ON;
+	if (opts->headingControl)
+		bits |= IFX_SSC_CON_MSB_FIRST;
+	if (opts->clockPhase)
+		bits |= IFX_SSC_CON_LATCH_THEN_SHIFT;
+	if (opts->clockPolarity)
+		bits |= IFX_SSC_CON_CLOCK_FALL;
+
+	switch (opts->modeRxTx)
+	{
+	case IFX_SSC_MODE_TX:
+		bits |= IFX_SSC_CON_RX_OFF;
+		break;
+	case IFX_SSC_MODE_RX:
+		bits |= IFX_SSC_CON_TX_OFF;
+		break;
+	}
+
+	local_irq_save (flags);
+
+	WRITE_PERIPHERAL_REGISTER (bits, info->mapbase + IFX_SSC_CON);
+	WRITE_PERIPHERAL_REGISTER ((info->opts.gpoCs << IFX_SSC_GPOCON_ISCSB0_POS) |
+				   (info->opts.gpoInv << IFX_SSC_GPOCON_INVOUT0_POS), info->mapbase + IFX_SSC_GPOCON);
+
+	WRITE_PERIPHERAL_REGISTER (info->opts.gpoCs << IFX_SSC_WHBGPOSTAT_SETOUT0_POS, info->mapbase + IFX_SSC_WHBGPOSTAT);
+
+	//master mode
+	if (opts->masterSelect)
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_MASTER_SELECT, info->mapbase + IFX_SSC_WHBSTATE);
+	else
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_MASTER_SELECT, info->mapbase + IFX_SSC_WHBSTATE);
+
+	// init serial framing
+	WRITE_PERIPHERAL_REGISTER (0, info->mapbase + IFX_SSC_SFCON);
+	/* set up the port pins */
+	//check for general requirements to switch (external) pad/pin characteristics
+	/* TODO: P0.9 SPI_CS4, P0.10 SPI_CS5, P 0.11 SPI_CS6, because of ASC0 */
+	/* p0.15 SPI_CS1(EEPROM), P0.13 SPI_CS3, */
+	/* Set p0.15 to alternative 01, others to 00 (In/OUT) */
+	*(DANUBE_GPIO_P0_DIR) = (*DANUBE_GPIO_P0_DIR) | (0xA000);
+	*(DANUBE_GPIO_P0_ALTSEL0) = (((*DANUBE_GPIO_P0_ALTSEL0) | (0x8000)) & (~(0x2000)));
+	*(DANUBE_GPIO_P0_ALTSEL1) = (((*DANUBE_GPIO_P0_ALTSEL1) & (~0x8000)) & (~(0x2000)));
+	*(DANUBE_GPIO_P0_OD) = (*DANUBE_GPIO_P0_OD) | 0xA000;
+
+	/* p1.6 SPI_CS2(SFLASH), p1.0 SPI_DIN, p1.1 SPI_DOUT, p1.2 SPI_CLK */
+	*(DANUBE_GPIO_P1_DIR) = ((*DANUBE_GPIO_P1_DIR) | (0x46)) & (~1);
+	*(DANUBE_GPIO_P1_ALTSEL0) = ((*DANUBE_GPIO_P1_ALTSEL0) | (0x47));
+	*(DANUBE_GPIO_P1_ALTSEL1) = (*DANUBE_GPIO_P1_ALTSEL1) & (~0x47);
+	*(DANUBE_GPIO_P1_OD) = (*DANUBE_GPIO_P1_OD) | 0x0046;
+
+	/*CS3 */
+	/*TODO: CS4 CS5 CS6 */
+	*DANUBE_GPIO_P0_OUT = ((*DANUBE_GPIO_P0_OUT) | 0x2000);
+
+	local_irq_restore (flags);
+
+	return 0;
+}
+
+static int
+ifx_ssc_set_baud (struct ifx_ssc_port *info, unsigned int baud)
+{
+	unsigned int ifx_ssc_clock;
+	unsigned int br;
+	unsigned long flags;
+	bool enabled;
+	int retval = 0;
+
+	ifx_ssc_clock = ifx_ssc_get_kernel_clk(info);
+	if (ifx_ssc_clock == 0)
+	{
+		retval = -EINVAL;
+		goto out;
+	}
+
+	local_irq_save (flags);
+
+	enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED);
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	br = (((ifx_ssc_clock >> 1) + baud / 2) / baud) - 1;
+	wmb();
+
+	if (br > 0xffff || ((br == 0) &&
+			((READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_MASTER) == 0))) {
+		local_irq_restore (flags);
+		printk ("%s: invalid baudrate %u\n", __func__, baud);
+		return -EINVAL;
+	}
+
+	WRITE_PERIPHERAL_REGISTER (br, info->mapbase + IFX_SSC_BR);
+
+	if (enabled)
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	local_irq_restore(flags);
+
+out:
+	return retval;
+}
+
+static int
+ifx_ssc_hwinit (struct ifx_ssc_port *info)
+{
+	unsigned long flags;
+	bool enabled;
+
+	enabled = (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE) & IFX_SSC_STATE_IS_ENABLED);
+	WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	if (ifx_ssc_sethwopts (info) < 0)
+	{
+		printk ("%s: setting the hardware options failed\n", __func__);
+		return -EINVAL;
+	}
+
+	if (ifx_ssc_set_baud (info, info->baud) < 0)
+	{
+		printk ("%s: setting the baud rate failed\n", __func__);
+		return -EINVAL;
+	}
+
+	local_irq_save (flags);
+
+	/* TX FIFO */
+	WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_TXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE,
+				   info->mapbase + IFX_SSC_TXFCON);
+	/* RX FIFO */
+	WRITE_PERIPHERAL_REGISTER ((IFX_SSC_DEF_RXFIFO_FL << IFX_SSC_XFCON_ITL_OFFSET) | IFX_SSC_XFCON_FIFO_ENABLE, 
+				   info->mapbase + IFX_SSC_RXFCON);
+
+	local_irq_restore (flags);
+
+	if (enabled)
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_SET_ENABLE, info->mapbase + IFX_SSC_WHBSTATE);
+
+	return 0;
+}
+
+int
+ifx_ssc_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data)
+{
+	struct ifx_ssc_port *info;
+	int line, ret_val = 0;
+	unsigned long flags;
+	unsigned long tmp;
+	int from_kernel = 0;
+
+	if ((inode == (struct inode *) 0) || (inode == (struct inode *) 1))
+	{
+		from_kernel = 1;
+		line = (int) inode;
+	} else {
+		line = MINOR (filp->f_dentry->d_inode->i_rdev);
+	}
+
+	if (line < 0 || line >= PORT_CNT)
+		return -ENXIO;
+
+	info = &isp[line];
+
+	switch (cmd)
+	{
+	case IFX_SSC_STATS_READ:
+		/* data must be a pointer to a struct ifx_ssc_statistics */
+		if (from_kernel)
+			memcpy ((void *) data, (void *) &info->stats,
+				sizeof (struct ifx_ssc_statistics));
+		else if (copy_to_user ((void *) data,
+				       (void *) &info->stats,
+				       sizeof (struct ifx_ssc_statistics)))
+			ret_val = -EFAULT;
+		break;
+	case IFX_SSC_STATS_RESET:
+		/* just resets the statistics counters */
+		memset ((void *) &info->stats, 0,
+			sizeof (struct ifx_ssc_statistics));
+		break;
+	case IFX_SSC_BAUD_SET:
+		/* if the buffers are not empty then the port is */
+		/* busy and we shouldn't change things on-the-fly! */
+		if (!info->txbuf || !info->rxbuf ||
+		    (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE)
+		     & IFX_SSC_STATE_BUSY)) {
+			ret_val = -EBUSY;
+			break;
+		}
+		/* misuse flags */
+		if (from_kernel)
+			flags = *((unsigned long *) data);
+		else if (copy_from_user ((void *) &flags,
+					 (void *) data, sizeof (flags))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		if (flags == 0) {
+			ret_val = -EINVAL;
+			break;
+		}
+		if (ifx_ssc_set_baud (info, flags) < 0) {
+			ret_val = -EINVAL;
+			break;
+		}
+		info->baud = flags;
+		break;
+	case IFX_SSC_BAUD_GET:
+		if (from_kernel)
+			*((unsigned int *) data) = info->baud;
+		else if (copy_to_user ((void *) data,
+				       (void *) &info->baud,
+				       sizeof (unsigned long)))
+			ret_val = -EFAULT;
+		break;
+	case IFX_SSC_RXTX_MODE_SET:
+		if (from_kernel)
+			tmp = *((unsigned long *) data);
+		else if (copy_from_user ((void *) &tmp,
+					 (void *) data, sizeof (tmp))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		ret_val = ifx_ssc_rxtx_mode_set (info, tmp);
+		break;
+	case IFX_SSC_RXTX_MODE_GET:
+		tmp = READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_CON) &
+			(~(IFX_SSC_CON_RX_OFF | IFX_SSC_CON_TX_OFF));
+		if (from_kernel)
+			*((unsigned int *) data) = tmp;
+		else if (copy_to_user ((void *) data,
+				       (void *) &tmp, sizeof (tmp)))
+			ret_val = -EFAULT;
+		break;
+
+	case IFX_SSC_ABORT:
+		ifx_ssc_abort (info);
+		break;
+
+	case IFX_SSC_GPO_OUT_SET:
+		if (from_kernel)
+			tmp = *((unsigned long *) data);
+		else if (copy_from_user ((void *) &tmp,
+					 (void *) data, sizeof (tmp))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		if (tmp > IFX_SSC_MAX_GPO_OUT)
+			ret_val = -EINVAL;
+		else
+			WRITE_PERIPHERAL_REGISTER
+				(1 << (tmp + IFX_SSC_WHBGPOSTAT_SETOUT0_POS),
+				 info->mapbase + IFX_SSC_WHBGPOSTAT);
+		break;
+	case IFX_SSC_GPO_OUT_CLR:
+		if (from_kernel)
+			tmp = *((unsigned long *) data);
+		else if (copy_from_user ((void *) &tmp,
+					 (void *) data, sizeof (tmp))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		if (tmp > IFX_SSC_MAX_GPO_OUT)
+			ret_val = -EINVAL;
+		else {
+			WRITE_PERIPHERAL_REGISTER
+				(1 << (tmp + IFX_SSC_WHBGPOSTAT_CLROUT0_POS),
+				 info->mapbase + IFX_SSC_WHBGPOSTAT);
+		}
+		break;
+	case IFX_SSC_GPO_OUT_GET:
+		tmp = READ_PERIPHERAL_REGISTER
+			(info->mapbase + IFX_SSC_GPOSTAT);
+		if (from_kernel)
+			*((unsigned int *) data) = tmp;
+		else if (copy_to_user ((void *) data,
+				       (void *) &tmp, sizeof (tmp)))
+			ret_val = -EFAULT;
+		break;
+	case IFX_SSC_FRM_STATUS_GET:
+		ifx_ssc_frm_status_get (info);
+		if (from_kernel)
+			memcpy ((void *) data, (void *) &info->frm_status,
+				sizeof (struct ifx_ssc_frm_status));
+		else if (copy_to_user ((void *) data,
+				       (void *) &info->frm_status,
+				       sizeof (struct ifx_ssc_frm_status)))
+			ret_val = -EFAULT;
+		break;
+	case IFX_SSC_FRM_CONTROL_GET:
+		ifx_ssc_frm_control_get (info);
+		if (from_kernel)
+			memcpy ((void *) data, (void *) &info->frm_opts,
+				sizeof (struct ifx_ssc_frm_opts));
+		else if (copy_to_user ((void *) data,
+				       (void *) &info->frm_opts,
+				       sizeof (struct ifx_ssc_frm_opts)))
+			ret_val = -EFAULT;
+		break;
+	case IFX_SSC_FRM_CONTROL_SET:
+		if (from_kernel)
+			memcpy ((void *) &info->frm_opts, (void *) data,
+				sizeof (struct ifx_ssc_frm_opts));
+		else if (copy_to_user ((void *) &info->frm_opts,
+				       (void *) data,
+				       sizeof (struct ifx_ssc_frm_opts))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		ret_val = ifx_ssc_frm_control_set (info);
+		break;
+	case IFX_SSC_HWOPTS_SET:
+		/* data must be a pointer to a struct ifx_ssc_hwopts */
+		/* if the buffers are not empty then the port is */
+		/* busy and we shouldn't change things on-the-fly! */
+		if (!info->txbuf || !info->rxbuf ||
+		    (READ_PERIPHERAL_REGISTER (info->mapbase + IFX_SSC_STATE)
+		     & IFX_SSC_STATE_BUSY)) {
+			ret_val = -EBUSY;
+			break;
+		}
+		if (from_kernel)
+			memcpy ((void *) &info->opts, (void *) data,
+				sizeof (struct ifx_ssc_hwopts));
+		else if (copy_from_user ((void *) &info->opts,
+					 (void *) data,
+					 sizeof (struct ifx_ssc_hwopts))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		if (ifx_ssc_hwinit (info) < 0) {
+			ret_val = -EIO;
+		}
+		break;
+	case IFX_SSC_HWOPTS_GET:
+		/* data must be a pointer to a struct ifx_ssc_hwopts */
+		if (from_kernel)
+			memcpy ((void *) data, (void *) &info->opts,
+				sizeof (struct ifx_ssc_hwopts));
+		else if (copy_to_user ((void *) data,
+				       (void *) &info->opts,
+				       sizeof (struct ifx_ssc_hwopts)))
+			ret_val = -EFAULT;
+		break;
+	default:
+		ret_val = -ENOIOCTLCMD;
+	}
+
+	return ret_val;
+}
+EXPORT_SYMBOL(ifx_ssc_ioctl);
+
+static int
+ifx_ssc1_read_proc (char *page, char **start, off_t offset, int count, int *eof, void *data)
+{
+	int off = 0;
+	unsigned long flags;
+
+	local_save_flags(flags);
+	local_irq_disable();
+
+	off += sprintf (page + off, "Statistics for Infineon Synchronous Serial Controller SSC1\n");
+	off += sprintf (page + off, "RX overflow errors %d\n", isp[0].stats.rxOvErr);
+	off += sprintf (page + off, "RX underflow errors %d\n", isp[0].stats.rxUnErr);
+	off += sprintf (page + off, "TX overflow errors %d\n", isp[0].stats.txOvErr);
+	off += sprintf (page + off, "TX underflow errors %d\n", isp[0].stats.txUnErr);
+	off += sprintf (page + off, "Abort errors %d\n", isp[0].stats.abortErr);
+	off += sprintf (page + off, "Mode errors %d\n", isp[0].stats.modeErr);
+	off += sprintf (page + off, "RX Bytes %d\n", isp[0].stats.rxBytes);
+	off += sprintf (page + off, "TX Bytes %d\n", isp[0].stats.txBytes);
+
+	local_irq_restore(flags);
+	*eof = 1;
+
+	return off;
+}
+
+int __init
+ifx_ssc_init (void)
+{
+	struct ifx_ssc_port *info;
+	int i, nbytes;
+	unsigned long flags;
+	int ret_val;
+
+	ret_val = -ENOMEM;
+	nbytes = PORT_CNT * sizeof(struct ifx_ssc_port);
+	isp = (struct ifx_ssc_port*)kmalloc(nbytes, GFP_KERNEL);
+
+	if (isp == NULL)
+	{
+		printk("%s: no memory for isp\n", __func__);
+		return (ret_val);
+	}
+	memset(isp, 0, nbytes);
+
+	ret_val = -ENXIO;
+	if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0)
+	{
+		printk ("Unable to register major %d for the Infineon SSC\n", maj);
+		if (maj == 0)
+		{
+			goto errout;
+		} else {
+			maj = 0;
+			if ((i = register_chrdev (maj, "ssc", &ifx_ssc_fops)) < 0)
+			{
+				printk ("Unable to register major %d for the Infineon SSC\n", maj);
+				goto errout;
+			}
+		}
+	}
+
+	if (maj == 0)
+		maj = i;
+
+	/* set default values in ifx_ssc_port */
+	for (i = 0; i < PORT_CNT; i++) {
+		info = &isp[i];
+		info->port_nr = i;
+		/* default values for the HwOpts */
+		info->opts.AbortErrDetect = IFX_SSC_DEF_ABRT_ERR_DETECT;
+		info->opts.rxOvErrDetect = IFX_SSC_DEF_RO_ERR_DETECT;
+		info->opts.rxUndErrDetect = IFX_SSC_DEF_RU_ERR_DETECT;
+		info->opts.txOvErrDetect = IFX_SSC_DEF_TO_ERR_DETECT;
+		info->opts.txUndErrDetect = IFX_SSC_DEF_TU_ERR_DETECT;
+		info->opts.loopBack = IFX_SSC_DEF_LOOP_BACK;
+		info->opts.echoMode = IFX_SSC_DEF_ECHO_MODE;
+		info->opts.idleValue = IFX_SSC_DEF_IDLE_DATA;
+		info->opts.clockPolarity = IFX_SSC_DEF_CLOCK_POLARITY;
+		info->opts.clockPhase = IFX_SSC_DEF_CLOCK_PHASE;
+		info->opts.headingControl = IFX_SSC_DEF_HEADING_CONTROL;
+		info->opts.dataWidth = IFX_SSC_DEF_DATA_WIDTH;
+		info->opts.modeRxTx = IFX_SSC_DEF_MODE_RXTX;
+		info->opts.gpoCs = IFX_SSC_DEF_GPO_CS;
+		info->opts.gpoInv = IFX_SSC_DEF_GPO_INV;
+		info->opts.masterSelect = IFX_SSC_DEF_MASTERSLAVE;
+		info->baud = IFX_SSC_DEF_BAUDRATE;
+		info->rxbuf = NULL;
+		info->txbuf = NULL;
+		/* values specific to SSC1 */
+		if (i == 0) {
+			info->mapbase = DANUBE_SSC1_BASE_ADDR;
+			info->txirq = DANUBE_SSC_TIR;
+			info->rxirq = DANUBE_SSC_RIR;
+			info->errirq = DANUBE_SSC_EIR;
+		}
+
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_RMC << IFX_CLC_RUN_DIVIDER_OFFSET, info->mapbase + IFX_SSC_CLC);
+
+		init_waitqueue_head (&info->rwait);
+
+		local_irq_save (flags);
+
+		// init serial framing register
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_SFCON, info->mapbase + IFX_SSC_SFCON);
+
+		ret_val = request_irq(info->txirq, ifx_ssc_tx_int, SA_INTERRUPT, "ifx_ssc_tx", info);
+		if (ret_val)
+		{
+			printk("%s: unable to get irq %d\n", __func__, info->txirq);
+			local_irq_restore(flags);
+			goto errout;
+		}
+
+		ret_val = request_irq(info->rxirq, ifx_ssc_rx_int, SA_INTERRUPT, "ifx_ssc_rx", info);
+		if (ret_val)
+		{
+			printk ("%s: unable to get irq %d\n", __func__, info->rxirq);
+			local_irq_restore (flags);
+			goto irqerr;
+		}
+
+		ret_val = request_irq(info->errirq, ifx_ssc_err_int, SA_INTERRUPT,"ifx_ssc_err", info);
+		if (ret_val)
+		{
+			printk ("%s: unable to get irq %d\n", __func__, info->errirq);
+			local_irq_restore (flags);
+			goto irqerr;
+		}
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_DEF_IRNEN, info->mapbase + IFX_SSC_IRN_EN);
+
+		enable_irq(info->txirq);
+		enable_irq(info->rxirq);
+		enable_irq(info->errirq);
+
+		local_irq_restore (flags);
+	}
+
+	for (i = 0; i < PORT_CNT; i++) {
+		info = &isp[i];
+		if (ifx_ssc_hwinit (info) < 0)
+		{
+			printk ("%s: hardware init failed for port %d\n", __func__, i);
+			goto irqerr;
+		}
+	}
+
+	create_proc_read_entry ("driver/ssc1", 0, NULL, ifx_ssc1_read_proc, NULL);
+
+	return 0;
+
+irqerr:
+	free_irq(isp[0].txirq, &isp[0]);
+	free_irq(isp[0].rxirq, &isp[0]);
+	free_irq(isp[0].errirq, &isp[0]);
+errout:
+	kfree (isp);
+	return (ret_val);
+}
+
+void
+ifx_ssc_cleanup_module (void)
+{
+	int i;
+
+	for (i = 0; i < PORT_CNT; i++) {
+		WRITE_PERIPHERAL_REGISTER (IFX_SSC_WHBSTATE_CLR_ENABLE, isp[i].mapbase + IFX_SSC_WHBSTATE);
+		free_irq(isp[i].txirq, &isp[i]);
+		free_irq(isp[i].rxirq, &isp[i]);
+		free_irq(isp[i].errirq, &isp[i]);
+	}
+	kfree (isp);
+	remove_proc_entry ("driver/ssc1", NULL);
+}
+
+module_init(ifx_ssc_init);
+module_exit(ifx_ssc_cleanup_module);
+
+
+inline int
+ifx_ssc_cs_low (u32 pin)
+{
+	int ret = 0;
+	if ((ret = ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_GPO_OUT_CLR, (unsigned long) &pin)))
+		printk ("clear CS %d fails\n", pin);
+	wmb ();
+
+	return ret;
+}
+EXPORT_SYMBOL(ifx_ssc_cs_low);
+
+inline int
+ifx_ssc_cs_high (u32 pin)
+{
+	int ret = 0;
+	if ((ret = ifx_ssc_ioctl((struct inode *) 0, NULL, IFX_SSC_GPO_OUT_SET, (unsigned long) &pin)))
+		printk ("set CS %d fails\n", pin);
+	wmb ();
+
+	return ret;
+}
+EXPORT_SYMBOL(ifx_ssc_cs_high);
+
+static int
+ssc_session (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
+{
+	int ret = 0;
+
+	char *ssc_tx_buf = NULL;
+	char *ssc_rx_buf = NULL;
+	int eff_size = 0;
+	u8 mode = 0;
+
+	if (tx_buf == NULL && tx_len == 0 && rx_buf == NULL && rx_len == 0) {
+		printk ("invalid parameters\n");
+		ret = -EINVAL;
+		goto ssc_session_exit;
+	}
+	else if (tx_buf == NULL || tx_len == 0) {
+		if (rx_buf != NULL && rx_len != 0) {
+			mode = IFX_SSC_MODE_RX;
+		}
+		else {
+			printk ("invalid parameters\n");
+			ret = -EINVAL;
+			goto ssc_session_exit;
+		}
+	}
+	else if (rx_buf == NULL || rx_len == 0) {
+		if (tx_buf != NULL && tx_len != 0) {
+			mode = IFX_SSC_MODE_TX;
+		}
+		else {
+			printk ("invalid parameters\n");
+			ret = -EINVAL;
+			goto ssc_session_exit;
+		}
+	}
+	else {
+		mode = IFX_SSC_MODE_RXTX;
+	}
+
+	if (mode == IFX_SSC_MODE_RXTX) {
+		eff_size = tx_len + rx_len;
+	}
+	else if (mode == IFX_SSC_MODE_RX) {
+		eff_size = rx_len;
+	}
+	else {
+		eff_size = tx_len;
+	}
+
+	//4 bytes alignment,  required by driver
+	/* change by TaiCheng */
+	//if (in_irq()){
+	if (1) {
+		ssc_tx_buf =
+			(char *) kmalloc (sizeof (char) *
+					  ((eff_size + 3) & (~3)),
+					  GFP_ATOMIC);
+		ssc_rx_buf =
+			(char *) kmalloc (sizeof (char) *
+					  ((eff_size + 3) & (~3)),
+					  GFP_ATOMIC);
+	}
+	else {
+		ssc_tx_buf =
+			(char *) kmalloc (sizeof (char) *
+					  ((eff_size + 3) & (~3)),
+					  GFP_KERNEL);
+		ssc_rx_buf =
+			(char *) kmalloc (sizeof (char) *
+					  ((eff_size + 3) & (~3)),
+					  GFP_KERNEL);
+	}
+	if (ssc_tx_buf == NULL || ssc_rx_buf == NULL) {
+		printk ("no memory for size of %d\n", eff_size);
+		ret = -ENOMEM;
+		goto ssc_session_exit;
+	}
+	memset ((void *) ssc_tx_buf, 0, eff_size);
+	memset ((void *) ssc_rx_buf, 0, eff_size);
+
+	if (tx_len > 0) {
+		memcpy (ssc_tx_buf, tx_buf, tx_len);
+	}
+
+	ret = ifx_ssc_kwrite (0, ssc_tx_buf, eff_size);
+
+	if (ret > 0) {
+		ssc_tx_buf = NULL;	//should be freed by ifx_ssc_kwrite
+	}
+
+	if (ret != eff_size) {
+		printk ("ifx_ssc_write return %d\n", ret);
+		goto ssc_session_exit;
+	}
+	ret = ifx_ssc_kread (0, ssc_rx_buf, eff_size);
+	if (ret != eff_size) {
+		printk ("ifx_ssc_read return %d\n", ret);
+		goto ssc_session_exit;
+	}
+
+	memcpy (rx_buf, ssc_rx_buf + tx_len, rx_len);
+
+	if (mode == IFX_SSC_MODE_TX) {
+		ret = tx_len;
+	}
+	else {
+		ret = rx_len;
+	}
+      ssc_session_exit:
+
+	if (ssc_tx_buf != NULL)
+		kfree (ssc_tx_buf);
+	if (ssc_rx_buf != NULL)
+		kfree (ssc_rx_buf);
+
+	if (ret < 0) {
+		printk ("ssc session fails\n");
+	}
+	return ret;
+}
+
+int
+ifx_ssc_txrx (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len)
+{
+	return ssc_session(tx_buf, tx_len, rx_buf, rx_len);
+}
+EXPORT_SYMBOL(ifx_ssc_txrx);
+
+int
+ifx_ssc_tx (char *tx_buf, u32 tx_len)
+{
+	return ssc_session(tx_buf, tx_len, NULL, 0);
+}
+EXPORT_SYMBOL(ifx_ssc_tx);
+
+int
+ifx_ssc_rx (char *rx_buf, u32 rx_len)
+{
+	return ssc_session(NULL, 0, rx_buf, rx_len);
+}
+EXPORT_SYMBOL(ifx_ssc_rx);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("danube ssc driver");
+
diff --git a/target/linux/ifxmips/files/drivers/char/watchdog/danube_wdt.c b/target/linux/ifxmips/files/drivers/char/watchdog/danube_wdt.c
new file mode 100644
index 0000000000..be2b339381
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/char/watchdog/danube_wdt.c
@@ -0,0 +1,287 @@
+/*
+ *   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.
+ *
+ *   Copyright (C) 2006 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ *
+ */
+
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <asm-mips/danube/danube_wdt.h>
+#include <asm-mips/danube/danube.h>
+
+
+// TODO remove magic numbers and weirdo macros
+
+extern unsigned int danube_get_fpi_hz (void);
+
+static int danube_wdt_inuse = 0;
+static int danube_wdt_major = 0;
+
+int
+danube_wdt_enable (unsigned int timeout)
+{
+	unsigned int wdt_cr = 0;
+	unsigned int wdt_reload = 0;
+	unsigned int wdt_clkdiv, wdt_pwl, ffpi;
+	int retval = 0;
+
+	/* clock divider & prewarning limit */
+	wdt_clkdiv = 1 << (7 * DANUBE_BIU_WDT_CR_CLKDIV_GET(readl(DANUBE_BIU_WDT_CR)));
+	wdt_pwl = 0x8000 >> DANUBE_BIU_WDT_CR_PWL_GET(readl(DANUBE_BIU_WDT_CR));
+
+	//TODO
+	printk("WARNING FUNCTION CALL MISSING!!!");
+	//ffpi = cgu_get_io_region_clock();
+	printk("cpu clock = %d\n", ffpi);
+
+	/* caculate reload value */
+	wdt_reload = (timeout * (ffpi / wdt_clkdiv)) + wdt_pwl;
+
+	printk("wdt_pwl=0x%x, wdt_clkdiv=%d, ffpi=%d, wdt_reload = 0x%x\n",
+		wdt_pwl, wdt_clkdiv, ffpi, wdt_reload);
+
+	if (wdt_reload > 0xFFFF)
+	{
+		printk ("timeout too large %d\n", timeout);
+		retval = -EINVAL;
+		goto out;
+	}
+
+	/* Write first part of password access */
+	writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
+
+	wdt_cr = readl(DANUBE_BIU_WDT_CR);
+	wdt_cr &= (!DANUBE_BIU_WDT_CR_PW_SET(0xff) &
+		   !DANUBE_BIU_WDT_CR_PWL_SET(0x3) &
+		   !DANUBE_BIU_WDT_CR_CLKDIV_SET(0x3) &
+		   !DANUBE_BIU_WDT_CR_RELOAD_SET(0xffff));
+
+	wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) |
+		   DANUBE_BIU_WDT_CR_PWL_SET(DANUBE_BIU_WDT_CR_PWL_GET(readl(DANUBE_BIU_WDT_CR))) |
+		   DANUBE_BIU_WDT_CR_CLKDIV_SET(DANUBE_BIU_WDT_CR_CLKDIV_GET(readl(DANUBE_BIU_WDT_CR))) |
+		   DANUBE_BIU_WDT_CR_RELOAD_SET(wdt_reload) |
+		   DANUBE_BIU_WDT_CR_GEN);
+
+	writel(wdt_cr, DANUBE_BIU_WDT_CR);
+
+	printk("watchdog enabled\n");
+
+out:
+	return retval;
+}
+
+void
+danube_wdt_disable (void)
+{
+	writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
+	writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2), DANUBE_BIU_WDT_CR);
+
+	printk("watchdog disabled\n");
+}
+
+/* passed LPEN or DSEN */
+void
+danube_wdt_enable_feature (int en, int type)
+{
+	unsigned int wdt_cr = 0;
+
+	writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
+
+	wdt_cr = readl(DANUBE_BIU_WDT_CR);
+
+	if (en)
+	{
+		wdt_cr &= (~DANUBE_BIU_WDT_CR_PW_SET(0xff));
+		wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | type);
+	} else {
+		wdt_cr &= (~DANUBE_BIU_WDT_CR_PW_SET(0xff) & ~type);
+		wdt_cr |= DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2);
+	}
+
+	writel(wdt_cr, DANUBE_BIU_WDT_CR);
+}
+
+void
+danube_wdt_prewarning_limit (int pwl)
+{
+	unsigned int wdt_cr = 0;
+
+	wdt_cr = readl(DANUBE_BIU_WDT_CR);
+	writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
+
+	wdt_cr &= 0xf300ffff;
+	wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | DANUBE_BIU_WDT_CR_PWL_SET(pwl));
+
+	/* Set reload value in second password access */
+	writel(wdt_cr, DANUBE_BIU_WDT_CR);
+}
+
+void
+danube_wdt_set_clkdiv (int clkdiv)
+{
+	unsigned int wdt_cr = 0;
+
+	wdt_cr = readl(DANUBE_BIU_WDT_CR);
+	writel(DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW1), DANUBE_BIU_WDT_CR);
+
+	wdt_cr &= 0xfc00ffff;
+	wdt_cr |= (DANUBE_BIU_WDT_CR_PW_SET(DANUBE_WDT_PW2) | DANUBE_BIU_WDT_CR_CLKDIV_SET(clkdiv));
+
+	/* Set reload value in second password access */
+	writel(wdt_cr, DANUBE_BIU_WDT_CR);
+}
+
+static int
+danube_wdt_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
+	   unsigned long arg)
+{
+	int result = 0;
+	static int timeout = -1;
+	unsigned int user_arg;
+
+	if ((cmd != DANUBE_WDT_IOC_STOP) && (cmd != DANUBE_WDT_IOC_PING) && (cmd != DANUBE_WDT_IOC_GET_STATUS))
+	{
+		if (copy_from_user((void *) &user_arg, (void *) arg, sizeof (int))){
+			result = -EINVAL;
+			goto out;
+		}
+	}
+
+	switch (cmd)
+	{
+	case DANUBE_WDT_IOC_START:
+		if ((result = danube_wdt_enable(user_arg)) < 0)
+			timeout = -1;
+		else
+			timeout = user_arg;
+		break;
+
+	case DANUBE_WDT_IOC_STOP:
+		printk("disable watch dog timer\n");
+		danube_wdt_disable();
+		break;
+
+	case DANUBE_WDT_IOC_PING:
+		if (timeout < 0)
+			result = -EIO;
+		else
+			result = danube_wdt_enable(timeout);
+		break;
+
+	case DANUBE_WDT_IOC_GET_STATUS:
+		user_arg = readl(DANUBE_BIU_WDT_SR);
+		copy_to_user((int*)arg, (int*)&user_arg, sizeof(int));
+		break;
+
+	case DANUBE_WDT_IOC_SET_PWL:
+		danube_wdt_prewarning_limit(user_arg);
+		break;
+
+	case DANUBE_WDT_IOC_SET_DSEN:
+		danube_wdt_enable_feature(user_arg, DANUBE_BIU_WDT_CR_DSEN);
+		break;
+
+	case DANUBE_WDT_IOC_SET_LPEN:
+		danube_wdt_enable_feature(user_arg, DANUBE_BIU_WDT_CR_LPEN);
+		break;
+
+	case DANUBE_WDT_IOC_SET_CLKDIV:
+		danube_wdt_set_clkdiv(user_arg);
+		break;
+
+	default:
+		printk("unknown watchdog iotcl\n");
+	}
+
+out:
+	return result;
+}
+
+static int
+danube_wdt_open (struct inode *inode, struct file *file)
+{
+	if (danube_wdt_inuse)
+		return -EBUSY;
+
+	danube_wdt_inuse = 1;
+
+	return 0;
+}
+
+static int
+danube_wdt_release (struct inode *inode, struct file *file)
+{
+	danube_wdt_inuse = 0;
+
+	return 0;
+}
+
+int
+danube_wdt_register_proc_read (char *buf, char **start, off_t offset, int count,
+			int *eof, void *data)
+{
+	int len = 0;
+
+	len += sprintf (buf + len, "DANUBE_BIU_WDT_PROC_READ\n");
+	len += sprintf (buf + len, "DANUBE_BIU_WDT_CR(0x%08x)	: 0x%08x\n",
+			(unsigned int)DANUBE_BIU_WDT_CR, readl(DANUBE_BIU_WDT_CR));
+	len += sprintf (buf + len, "DANUBE_BIU_WDT_SR(0x%08x)	: 0x%08x\n",
+			(unsigned int)DANUBE_BIU_WDT_SR, readl(DANUBE_BIU_WDT_SR));
+
+	*eof = 1;
+
+	return len;
+}
+
+static struct file_operations wdt_fops = {
+      .owner = THIS_MODULE,
+      .ioctl = danube_wdt_ioctl,
+      .open = danube_wdt_open,
+      .release = danube_wdt_release,
+};
+
+int __init
+danube_wdt_init_module (void)
+{
+	danube_wdt_major = register_chrdev(0, "wdt", &wdt_fops);
+
+	if (danube_wdt_major < 0)
+	{
+		printk("cannot register watchdog device\n");
+
+		return -EINVAL;
+	}
+
+	create_proc_read_entry("danube_wdt", 0, NULL, danube_wdt_register_proc_read, NULL);
+
+	printk("danube watchdog loaded\n");
+
+	return 0;
+}
+
+void
+danube_wdt_cleanup_module (void)
+{
+	unregister_chrdev(danube_wdt_major, "wdt");
+	remove_proc_entry("danube_wdt", NULL);
+}
+
+module_init(danube_wdt_init_module);
+module_exit(danube_wdt_cleanup_module);