add original danube gpio driver ... already did some minor cleanup

SVN-Revision: 9738
2007-12-13 21:10:25 +00:00 · 2007-12-13 21:10:25 +00:00 · 23e44079dc
parent fa9710c7ee
commit 23e44079dc
3 changed files with 882 additions and 12 deletions
--- a/target/linux/danube/files/arch/mips/danube/Kconfig
+++ b/target/linux/danube/files/arch/mips/danube/Kconfig
@ -20,5 +20,9 @@ config DANUBE_LED
 	bool "Danube led"
 	default y

+config DANUBE_GPIO
+	bool "Danube gpio"
+	default y
+
 endmenu

--- a/target/linux/danube/files/drivers/char/danube_gpio.c
+++ b/target/linux/danube/files/drivers/char/danube_gpio.c
@ -0,0 +1,855 @@
+/*
+ *   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/port.h>
+#include "port_defs.h"
+
+#define MAX_PORTS	2	// Number of ports in system
+#define PINS_PER_PORT	16	// Number of available pins per port
+
+static int port_major = 0;
+static int danube_port_pin_usage[MAX_PORTS][PINS_PER_PORT];	// Map for pin usage
+static u32 danube_port_bases[MAX_PORTS]
+	= { DANUBE_GPIO,
+	DANUBE_GPIO + 0x00000030
+};				// Base addresses for ports
+
+static struct semaphore port_sem;
+
+int
+danube_port_reserve_pin (int port, int pin, int module_id)
+{
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] == 0) {
+		danube_port_pin_usage[port][pin] = module_id;
+	}
+	else {
+		return -EBUSY;
+	}
+
+	return OK;
+}
+
+int
+danube_port_free_pin (int port, int pin, int module_id)
+{
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+	danube_port_pin_usage[port][pin] = 0;
+
+	return OK;
+}
+
+int
+danube_port_set_open_drain (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_open_drain (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OD_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_set_pudsel (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG, reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG,
+			reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_pudsel (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG, reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDSEL_REG,
+			reg);
+
+	return OK;
+}
+
+int
+danube_port_set_puden (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_puden (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_PUDEN_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_set_stoff (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_stoff (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_STOFF_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_set_dir_out (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_set_dir_in (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_DIR_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_set_output (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_output (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_OUT_REG, reg);
+
+	return OK;
+}
+
+int
+danube_port_get_input (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_IN_REG, reg);
+	reg &= (1 << pin);
+	if (reg == 0x00)
+		return 0;
+	else
+		return 1;
+}
+
+int
+danube_port_set_altsel0 (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
+		       reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
+			reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_altsel0 (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
+		       reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL0_REG,
+			reg);
+
+	return OK;
+}
+
+int
+danube_port_set_altsel1 (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
+		       reg);
+	reg |= (1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
+			reg);
+
+	return OK;
+}
+
+int
+danube_port_clear_altsel1 (int port, int pin, int module_id)
+{
+	u32 reg;
+
+	if (port < 0 || pin < 0)
+		return -EINVAL;
+	if (port > MAX_PORTS || pin > PINS_PER_PORT)
+		return -EINVAL;
+
+	if (danube_port_pin_usage[port][pin] != module_id)
+		return -EBUSY;
+
+	PORT_READ_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
+		       reg);
+	reg &= ~(1 << pin);
+	PORT_WRITE_REG (danube_port_bases[port] + DANUBE_PORT_ALTSEL1_REG,
+			reg);
+
+	return OK;
+}
+
+int
+danube_port_read_procmem (char *buf, char **start, off_t offset, int count,
+			  int *eof, void *data)
+{
+	long len = 0;
+	int t = 0;
+	u32 bit = 0;
+	u32 reg = 0;
+
+	len = sprintf (buf, "\nDanube Port Settings\n");
+
+	len = len + sprintf (buf + len,
+			     "         3         2         1         0\n");
+	len = len + sprintf (buf + len,
+			     "        10987654321098765432109876543210\n");
+	len = len + sprintf (buf + len,
+			     "----------------------------------------\n");
+
+	len = len + sprintf (buf + len, "\nP0-OUT: ");
+	PORT_READ_REG (DANUBE_GPIO_P0_OUT, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-OUT: ");
+	PORT_READ_REG (DANUBE_GPIO_P1_OUT, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0-IN:  ");
+	PORT_READ_REG (DANUBE_GPIO_P0_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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-IN:  ");
+	PORT_READ_REG (DANUBE_GPIO_P1_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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0-DIR: ");
+	PORT_READ_REG (DANUBE_GPIO_P0_DIR, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-DIR: ");
+	PORT_READ_REG (DANUBE_GPIO_P1_DIR, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0-STO: ");
+	PORT_READ_REG (DANUBE_GPIO_P0_STOFF, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-STO: ");
+	PORT_READ_REG (DANUBE_GPIO_P1_STOFF, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0-PUDE:");
+	PORT_READ_REG (DANUBE_GPIO_P0_PUDEN, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-PUDE:");
+	PORT_READ_REG (DANUBE_GPIO_P1_PUDEN, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0-OD:  ");
+	PORT_READ_REG (DANUBE_GPIO_P0_OD, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-OD:  ");
+	PORT_READ_REG (DANUBE_GPIO_P1_OD, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0-PUDS:");
+	PORT_READ_REG (DANUBE_GPIO_P0_PUDSEL, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1-PUDS:");
+	PORT_READ_REG (DANUBE_GPIO_P1_PUDSEL, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0_ALT0:");
+	PORT_READ_REG (DANUBE_GPIO_P0_ALTSEL0, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP0_ALT1:");
+	PORT_READ_REG (DANUBE_GPIO_P0_ALTSEL1, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1_ALT0:");
+	PORT_READ_REG (DANUBE_GPIO_P1_ALTSEL0, 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;
+	}
+
+	len = len + sprintf (buf + len, "\nP1_ALT1:");
+	PORT_READ_REG (DANUBE_GPIO_P1_ALTSEL1, 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;
+	}
+
+	len = len + sprintf (buf + len, "\n\n");
+
+	*eof = 1;		// No more data available
+	return len;
+}
+
+static int
+danube_port_open (struct inode *inode, struct file *filep)
+{
+	return OK;
+}
+
+static int
+danube_port_release (struct inode *inode, struct file *filelp)
+{
+	return OK;
+}
+
+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) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_open_drain);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_open_drain);
+		}
+		break;
+	case DANUBE_PORT_IOCPUDSEL:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_pudsel);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_pudsel);
+		}
+		break;
+	case DANUBE_PORT_IOCPUDEN:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_puden);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_puden);
+		}
+		break;
+	case DANUBE_PORT_IOCSTOFF:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_stoff);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_stoff);
+		}
+		break;
+	case DANUBE_PORT_IOCDIR:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_dir_in);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_dir_out);
+		}
+		break;
+	case DANUBE_PORT_IOCOUTPUT:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_output);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_output);
+		}
+		break;
+	case DANUBE_PORT_IOCALTSEL0:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_altsel0);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_altsel0);
+		}
+		break;
+	case DANUBE_PORT_IOCALTSEL1:
+		if (parm.value == 0x00) {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_clear_altsel1);
+		}
+		else {
+			PORT_IOC_CALL (ret, parm.port, parm.pin,
+				       danube_port_set_altsel1);
+		}
+		break;
+	case DANUBE_PORT_IOCINPUT:
+		ret = danube_port_reserve_pin (parm.port, parm.pin,
+					       PORT_MODULE_ID);
+		if (ret == 0)
+			parm.value =
+				danube_port_get_input (parm.port, parm.pin,
+						       PORT_MODULE_ID);
+		ret = danube_port_free_pin (parm.port, parm.pin,
+					    PORT_MODULE_ID);
+		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_port_init (void)
+{
+	int t = 0;
+	int i = 0;
+	int err = 0;
+	u32 pins = 0;
+
+	printk ("Danube Port Initialization\n");
+
+	sema_init (&port_sem, 1);
+
+	/* Check ports for available pins */
+	for (t = 0; t < MAX_PORTS; t++) {
+		for (i = 0; i < PINS_PER_PORT; i++)
+			danube_port_pin_usage[t][i] = 0;
+	}
+
+	/* register port device */
+	err = register_chrdev (0, "danube-port", &port_fops);
+	if (err > 0)
+		port_major = err;
+	else {
+		printk ("danube-port: Error! Could not register port device. #%d\n", err);
+		return err;
+	}
+
+	/* Create proc file */
+	create_proc_read_entry ("driver/danube_port", 0, NULL,
+				danube_port_read_procmem, NULL);
+
+	return OK;
+}
+
+module_init (danube_port_init);
+
+EXPORT_SYMBOL (danube_port_reserve_pin);
+EXPORT_SYMBOL (danube_port_free_pin);
+EXPORT_SYMBOL (danube_port_set_open_drain);
+EXPORT_SYMBOL (danube_port_clear_open_drain);
+EXPORT_SYMBOL (danube_port_set_pudsel);
+EXPORT_SYMBOL (danube_port_clear_pudsel);
+EXPORT_SYMBOL (danube_port_set_puden);
+EXPORT_SYMBOL (danube_port_clear_puden);
+EXPORT_SYMBOL (danube_port_set_stoff);
+EXPORT_SYMBOL (danube_port_clear_stoff);
+EXPORT_SYMBOL (danube_port_set_dir_out);
+EXPORT_SYMBOL (danube_port_set_dir_in);
+EXPORT_SYMBOL (danube_port_set_output);
+EXPORT_SYMBOL (danube_port_clear_output);
+EXPORT_SYMBOL (danube_port_get_input);
+
+EXPORT_SYMBOL (danube_port_set_altsel0);
+EXPORT_SYMBOL (danube_port_clear_altsel0);
+EXPORT_SYMBOL (danube_port_set_altsel1);
+EXPORT_SYMBOL (danube_port_clear_altsel1);
--- a/target/linux/danube/patches/110-drivers.patch
+++ b/target/linux/danube/patches/110-drivers.patch
@ -1,7 +1,7 @@
 Index: linux-2.6.23/drivers/serial/Kconfig
 ===================================================================
--- linux-2.6.23.orig/drivers/serial/Kconfig	2007-12-10 21:38:39.000000000 +0100
-+++ linux-2.6.23/drivers/serial/Kconfig	2007-12-10 21:38:42.000000000 +0100
+--- linux-2.6.23.orig/drivers/serial/Kconfig	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/serial/Kconfig	2007-12-13 20:41:57.000000000 +0100
@@ -1259,4 +1259,10 @@
 	  Currently, only 8250 compatible ports are supported, but
 	  others can easily be added.
@ -15,8 +15,8 @@ Index: linux-2.6.23/drivers/serial/Kconfig
 endmenu
 Index: linux-2.6.23/drivers/serial/Makefile
 ===================================================================
--- linux-2.6.23.orig/drivers/serial/Makefile	2007-12-10 21:38:39.000000000 +0100
-+++ linux-2.6.23/drivers/serial/Makefile	2007-12-10 21:38:42.000000000 +0100
+--- linux-2.6.23.orig/drivers/serial/Makefile	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/serial/Makefile	2007-12-13 20:41:57.000000000 +0100
@@ -64,3 +64,4 @@
 obj-$(CONFIG_SERIAL_NETX) += netx-serial.o
 obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
@ -24,8 +24,8 @@ Index: linux-2.6.23/drivers/serial/Makefile
 +obj-$(CONFIG_SERIAL_DANUBE) += danube_asc.o
 Index: linux-2.6.23/drivers/mtd/maps/Makefile
 ===================================================================
--- linux-2.6.23.orig/drivers/mtd/maps/Makefile	2007-12-10 21:38:39.000000000 +0100
-+++ linux-2.6.23/drivers/mtd/maps/Makefile	2007-12-10 21:38:42.000000000 +0100
+--- linux-2.6.23.orig/drivers/mtd/maps/Makefile	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/mtd/maps/Makefile	2007-12-13 20:41:57.000000000 +0100
@@ -71,3 +71,4 @@
 obj-$(CONFIG_MTD_OMAP_NOR)	+= omap_nor.o
 obj-$(CONFIG_MTD_MTX1)		+= mtx-1_flash.o
@ -33,8 +33,8 @@ Index: linux-2.6.23/drivers/mtd/maps/Makefile
 +obj-$(CONFIG_MTD_DANUBE)	+= danube.o
 Index: linux-2.6.23/drivers/net/Kconfig
 ===================================================================
--- linux-2.6.23.orig/drivers/net/Kconfig	2007-12-10 21:38:42.000000000 +0100
-+++ linux-2.6.23/drivers/net/Kconfig	2007-12-10 21:38:42.000000000 +0100
+--- linux-2.6.23.orig/drivers/net/Kconfig	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/net/Kconfig	2007-12-13 20:41:57.000000000 +0100
@@ -339,6 +339,18 @@
 
 source "drivers/net/arm/Kconfig"
@ -56,8 +56,8 @@ Index: linux-2.6.23/drivers/net/Kconfig
 	depends on ARM || MIPS
 Index: linux-2.6.23/drivers/net/Makefile
 ===================================================================
--- linux-2.6.23.orig/drivers/net/Makefile	2007-12-10 21:38:42.000000000 +0100
-+++ linux-2.6.23/drivers/net/Makefile	2007-12-10 21:38:42.000000000 +0100
+--- linux-2.6.23.orig/drivers/net/Makefile	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/net/Makefile	2007-12-13 20:41:57.000000000 +0100
@@ -208,6 +208,7 @@
 obj-$(CONFIG_FEC_8XX) += fec_8xx/
 obj-$(CONFIG_PASEMI_MAC) += pasemi_mac.o
@ -68,8 +68,8 @@ Index: linux-2.6.23/drivers/net/Makefile
 
 Index: linux-2.6.23/drivers/char/watchdog/Makefile
 ===================================================================
--- linux-2.6.23.orig/drivers/char/watchdog/Makefile	2007-12-10 21:41:51.000000000 +0100
-+++ linux-2.6.23/drivers/char/watchdog/Makefile	2007-12-10 21:42:30.000000000 +0100
+--- linux-2.6.23.orig/drivers/char/watchdog/Makefile	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/char/watchdog/Makefile	2007-12-13 20:41:57.000000000 +0100
@@ -90,6 +90,7 @@
 obj-$(CONFIG_INDYDOG) += indydog.o
 obj-$(CONFIG_WDT_MTX1)	+= mtx-1_wdt.o
@ -78,3 +78,14 @@ Index: linux-2.6.23/drivers/char/watchdog/Makefile
 
 # PARISC Architecture
 
+Index: linux-2.6.23/drivers/char/Makefile
+===================================================================
+--- linux-2.6.23.orig/drivers/char/Makefile	2007-12-13 20:41:42.000000000 +0100
+++ linux-2.6.23/drivers/char/Makefile	2007-12-13 21:38:15.000000000 +0100
+@@ -135,3 +135,6 @@
+ 	rm $@.tmp
+ 
+ endif
+
+obj-$(CONFIG_DANUBE_LED)	+= danube_led.o
+obj-$(CONFIG_DANUBE_GPIO)	+= danube_gpio.o