[PATCH 2.6.12-rc6] add vr41xx gpio support
From: Yoichi Yuasa
Date: Sat Jun 11 2005 - 13:31:56 EST
This patch had added vr41xx gpio support.
Yoichi
Signed-off-by: Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
diff -urN -X dontdiff git5-orig/drivers/char/Kconfig git5/drivers/char/Kconfig
--- git5-orig/drivers/char/Kconfig Tue Jun 7 00:22:29 2005
+++ git5/drivers/char/Kconfig Sun Jun 12 02:37:20 2005
@@ -929,6 +929,10 @@
If compiled as a module, it will be called scx200_gpio.
+config GPIO_VR41XX
+ tristate "NEC VR4100 series General-purpose I/O Unit support"
+ depends CPU_VR41XX
+
config RAW_DRIVER
tristate "RAW driver (/dev/raw/rawN) (OBSOLETE)"
help
diff -urN -X dontdiff git5-orig/drivers/char/Makefile git5/drivers/char/Makefile
--- git5-orig/drivers/char/Makefile Tue Jun 7 00:22:29 2005
+++ git5/drivers/char/Makefile Sun Jun 12 02:37:20 2005
@@ -80,6 +80,7 @@
obj-$(CONFIG_NWBUTTON) += nwbutton.o
obj-$(CONFIG_NWFLASH) += nwflash.o
obj-$(CONFIG_SCx200_GPIO) += scx200_gpio.o
+obj-$(CONFIG_GPIO_VR41XX) += vr41xx_giu.o
obj-$(CONFIG_TANBAC_TB0219) += tb0219.o
obj-$(CONFIG_WATCHDOG) += watchdog/
diff -urN -X dontdiff git5-orig/drivers/char/vr41xx_giu.c git5/drivers/char/vr41xx_giu.c
--- git5-orig/drivers/char/vr41xx_giu.c Thu Jan 1 09:00:00 1970
+++ git5/drivers/char/vr41xx_giu.c Sun Jun 12 02:37:20 2005
@@ -0,0 +1,743 @@
+/*
+ * Driver for NEC VR4100 series General-purpose I/O Unit.
+ *
+ * Copyright (C) 2002 MontaVista Software Inc.
+ * Author: Yoichi Yuasa <yyuasa@xxxxxxxxxx or source@xxxxxxxxxx>
+ * Copyright (C) 2003-2005 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/vr41xx/giu.h>
+#include <asm/vr41xx/vr41xx.h>
+
+MODULE_AUTHOR("Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("NEC VR4100 series General-purpose I/O Unit driver");
+MODULE_LICENSE("GPL");
+
+static int major; /* default is dynamic major device number */
+module_param(major, int, 0);
+MODULE_PARM_DESC(major, "Major device number");
+
+#define GIU_TYPE1_START 0x0b000100UL
+#define GIU_TYPE1_SIZE 0x20UL
+
+#define GIU_TYPE2_START 0x0f000140UL
+#define GIU_TYPE2_SIZE 0x20UL
+
+#define GIU_TYPE3_START 0x0f000140UL
+#define GIU_TYPE3_SIZE 0x28UL
+
+#define GIU_PULLUPDOWN_START 0x0b0002e0UL
+#define GIU_PULLUPDOWN_SIZE 0x04UL
+
+#define GIUIOSELL 0x00
+#define GIUIOSELH 0x02
+#define GIUPIODL 0x04
+#define GIUPIODH 0x06
+#define GIUINTSTATL 0x08
+#define GIUINTSTATH 0x0a
+#define GIUINTENL 0x0c
+#define GIUINTENH 0x0e
+#define GIUINTTYPL 0x10
+#define GIUINTTYPH 0x12
+#define GIUINTALSELL 0x14
+#define GIUINTALSELH 0x16
+#define GIUINTHTSELL 0x18
+#define GIUINTHTSELH 0x1a
+#define GIUPODATL 0x1c
+#define GIUPODATEN 0x1c
+#define GIUPODATH 0x1e
+ #define PIOEN0 0x0100
+ #define PIOEN1 0x0200
+#define GIUPODAT 0x1e
+#define GIUFEDGEINHL 0x20
+#define GIUFEDGEINHH 0x22
+#define GIUREDGEINHL 0x24
+#define GIUREDGEINHH 0x26
+
+#define GIUUSEUPDN 0x1e0
+#define GIUTERMUPDN 0x1e2
+
+#define GPIO_HAS_PULLUPDOWN_IO 0x0001
+#define GPIO_HAS_OUTPUT_ENABLE 0x0002
+#define GPIO_HAS_INTERRUPT_EDGE_SELECT 0x0100
+
+static spinlock_t giu_lock;
+static struct resource *giu_resource1;
+static struct resource *giu_resource2;
+static unsigned long giu_flags;
+static unsigned int giu_nr_pins;
+
+static void __iomem *giu_base;
+
+#define giu_read(offset) readw(giu_base + (offset))
+#define giu_write(offset, value) writew((value), giu_base + (offset))
+
+#define GPIO_PIN_OF_IRQ(irq) ((irq) - GIU_IRQ_BASE)
+#define GIUINT_HIGH_OFFSET 16
+#define GIUINT_HIGH_MAX 32
+
+static inline uint16_t giu_set(uint16_t offset, uint16_t set)
+{
+ uint16_t data;
+
+ data = giu_read(offset);
+ data |= set;
+ giu_write(offset, data);
+
+ return data;
+}
+
+static inline uint16_t giu_clear(uint16_t offset, uint16_t clear)
+{
+ uint16_t data;
+
+ data = giu_read(offset);
+ data &= ~clear;
+ giu_write(offset, data);
+
+ return data;
+}
+
+static unsigned int startup_giuint_low_irq(unsigned int irq)
+{
+ unsigned int pin;
+
+ pin = GPIO_PIN_OF_IRQ(irq);
+ giu_write(GIUINTSTATL, 1 << pin);
+ giu_set(GIUINTENL, 1 << pin);
+
+ return 0;
+}
+
+static void shutdown_giuint_low_irq(unsigned int irq)
+{
+ giu_clear(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(irq));
+}
+
+static void enable_giuint_low_irq(unsigned int irq)
+{
+ giu_set(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(irq));
+}
+
+#define disable_giuint_low_irq shutdown_giuint_low_irq
+
+static void ack_giuint_low_irq(unsigned int irq)
+{
+ unsigned int pin;
+
+ pin = GPIO_PIN_OF_IRQ(irq);
+ giu_clear(GIUINTENL, 1 << pin);
+ giu_write(GIUINTSTATL, 1 << pin);
+}
+
+static void end_giuint_low_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ giu_set(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(irq));
+}
+
+static struct hw_interrupt_type giuint_low_irq_type = {
+ .typename = "GIUINTL",
+ .startup = startup_giuint_low_irq,
+ .shutdown = shutdown_giuint_low_irq,
+ .enable = enable_giuint_low_irq,
+ .disable = disable_giuint_low_irq,
+ .ack = ack_giuint_low_irq,
+ .end = end_giuint_low_irq,
+};
+
+static unsigned int startup_giuint_high_irq(unsigned int irq)
+{
+ unsigned int pin;
+
+ pin = GPIO_PIN_OF_IRQ(irq) - GIUINT_HIGH_OFFSET;
+ giu_write(GIUINTSTATH, 1 << pin);
+ giu_set(GIUINTENH, 1 << pin);
+
+ return 0;
+}
+
+static void shutdown_giuint_high_irq(unsigned int irq)
+{
+ giu_clear(GIUINTENH, 1 << (GPIO_PIN_OF_IRQ(irq) - GIUINT_HIGH_OFFSET));
+}
+
+static void enable_giuint_high_irq(unsigned int irq)
+{
+ giu_set(GIUINTENH, 1 << (GPIO_PIN_OF_IRQ(irq) - GIUINT_HIGH_OFFSET));
+}
+
+#define disable_giuint_high_irq shutdown_giuint_high_irq
+
+static void ack_giuint_high_irq(unsigned int irq)
+{
+ unsigned int pin;
+
+ pin = GPIO_PIN_OF_IRQ(irq) - GIUINT_HIGH_OFFSET;
+ giu_clear(GIUINTENH, 1 << pin);
+ giu_write(GIUINTSTATH, 1 << pin);
+}
+
+static void end_giuint_high_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ giu_set(GIUINTENH, 1 << (GPIO_PIN_OF_IRQ(irq) - GIUINT_HIGH_OFFSET));
+}
+
+static struct hw_interrupt_type giuint_high_irq_type = {
+ .typename = "GIUINTH",
+ .startup = startup_giuint_high_irq,
+ .shutdown = shutdown_giuint_high_irq,
+ .enable = enable_giuint_high_irq,
+ .disable = disable_giuint_high_irq,
+ .ack = ack_giuint_high_irq,
+ .end = end_giuint_high_irq,
+};
+
+static int giu_get_irq(unsigned int irq, struct pt_regs *regs)
+{
+ uint16_t pendl, pendh, maskl, maskh;
+ int i;
+
+ pendl = giu_read(GIUINTSTATL);
+ pendh = giu_read(GIUINTSTATH);
+ maskl = giu_read(GIUINTENL);
+ maskh = giu_read(GIUINTENH);
+
+ maskl &= pendl;
+ maskh &= pendh;
+
+ if (maskl) {
+ for (i = 0; i < 16; i++) {
+ if (maskl & (1 << i))
+ return GIU_IRQ(i);
+ }
+ } else if (maskh) {
+ for (i = 0; i < 16; i++) {
+ if (maskh & (1 << i))
+ return GIU_IRQ(i + GIUINT_HIGH_OFFSET);
+ }
+ }
+
+ printk(KERN_ERR "spurious GIU interrupt: %04x(%04x),%04x(%04x)\n",
+ maskl, pendl, maskh, pendh);
+
+ atomic_inc(&irq_err_count);
+
+ return -EINVAL;
+}
+
+void vr41xx_set_irq_trigger(unsigned int pin, irq_trigger_t trigger, irq_signal_t signal)
+{
+ uint16_t mask;
+
+ if (pin < GIUINT_HIGH_OFFSET) {
+ mask = 1 << pin;
+ if (trigger != IRQ_TRIGGER_LEVEL) {
+ giu_set(GIUINTTYPL, mask);
+ if (signal == IRQ_SIGNAL_HOLD)
+ giu_set(GIUINTHTSELL, mask);
+ else
+ giu_clear(GIUINTHTSELL, mask);
+ if (current_cpu_data.cputype == CPU_VR4133) {
+ switch (trigger) {
+ case IRQ_TRIGGER_EDGE_FALLING:
+ giu_set(GIUFEDGEINHL, mask);
+ giu_clear(GIUREDGEINHL, mask);
+ break;
+ case IRQ_TRIGGER_EDGE_RISING:
+ giu_clear(GIUFEDGEINHL, mask);
+ giu_set(GIUREDGEINHL, mask);
+ break;
+ default:
+ giu_set(GIUFEDGEINHL, mask);
+ giu_set(GIUREDGEINHL, mask);
+ break;
+ }
+ }
+ } else {
+ giu_clear(GIUINTTYPL, mask);
+ giu_clear(GIUINTHTSELL, mask);
+ }
+ giu_write(GIUINTSTATL, mask);
+ } else if (pin < GIUINT_HIGH_MAX) {
+ mask = 1 << (pin - GIUINT_HIGH_OFFSET);
+ if (trigger != IRQ_TRIGGER_LEVEL) {
+ giu_set(GIUINTTYPH, mask);
+ if (signal == IRQ_SIGNAL_HOLD)
+ giu_set(GIUINTHTSELH, mask);
+ else
+ giu_clear(GIUINTHTSELH, mask);
+ if (current_cpu_data.cputype == CPU_VR4133) {
+ switch (trigger) {
+ case IRQ_TRIGGER_EDGE_FALLING:
+ giu_set(GIUFEDGEINHH, mask);
+ giu_clear(GIUREDGEINHH, mask);
+ break;
+ case IRQ_TRIGGER_EDGE_RISING:
+ giu_clear(GIUFEDGEINHH, mask);
+ giu_set(GIUREDGEINHH, mask);
+ break;
+ default:
+ giu_set(GIUFEDGEINHH, mask);
+ giu_set(GIUREDGEINHH, mask);
+ break;
+ }
+ }
+ } else {
+ giu_clear(GIUINTTYPH, mask);
+ giu_clear(GIUINTHTSELH, mask);
+ }
+ giu_write(GIUINTSTATH, mask);
+ }
+}
+
+EXPORT_SYMBOL_GPL(vr41xx_set_irq_trigger);
+
+void vr41xx_set_irq_level(unsigned int pin, irq_level_t level)
+{
+ uint16_t mask;
+
+ if (pin < GIUINT_HIGH_OFFSET) {
+ mask = 1 << pin;
+ if (level == IRQ_LEVEL_HIGH)
+ giu_set(GIUINTALSELL, mask);
+ else
+ giu_clear(GIUINTALSELL, mask);
+ giu_write(GIUINTSTATL, mask);
+ } else if (pin < GIUINT_HIGH_MAX) {
+ mask = 1 << (pin - GIUINT_HIGH_OFFSET);
+ if (level == IRQ_LEVEL_HIGH)
+ giu_set(GIUINTALSELH, mask);
+ else
+ giu_clear(GIUINTALSELH, mask);
+ giu_write(GIUINTSTATH, mask);
+ }
+}
+
+EXPORT_SYMBOL_GPL(vr41xx_set_irq_level);
+
+gpio_data_t vr41xx_gpio_get_pin(unsigned int pin)
+{
+ uint16_t reg, mask;
+
+ if (pin >= giu_nr_pins)
+ return GPIO_DATA_INVAL;
+
+ if (pin < 16) {
+ reg = giu_read(GIUPIODL);
+ mask = (uint16_t)1 << pin;
+ } else if (pin < 32) {
+ reg = giu_read(GIUPIODH);
+ mask = (uint16_t)1 << (pin - 16);
+ } else if (pin < 48) {
+ reg = giu_read(GIUPODATL);
+ mask = (uint16_t)1 << (pin - 32);
+ } else {
+ reg = giu_read(GIUPODATH);
+ mask = (uint16_t)1 << (pin - 48);
+ }
+
+ if (reg & mask)
+ return GPIO_DATA_HIGH;
+
+ return GPIO_DATA_LOW;
+}
+
+EXPORT_SYMBOL_GPL(vr41xx_gpio_get_pin);
+
+int vr41xx_gpio_set_pin(unsigned int pin, gpio_data_t data)
+{
+ uint16_t offset, mask, reg;
+ unsigned long flags;
+
+ if (pin >= giu_nr_pins)
+ return -EINVAL;
+
+ if (pin < 16) {
+ offset = GIUPIODL;
+ mask = (uint16_t)1 << pin;
+ } else if (pin < 32) {
+ offset = GIUPIODH;
+ mask = (uint16_t)1 << (pin - 16);
+ } else if (pin < 48) {
+ offset = GIUPODATL;
+ mask = (uint16_t)1 << (pin - 32);
+ } else {
+ offset = GIUPODATH;
+ mask = (uint16_t)1 << (pin - 48);
+ }
+
+ spin_lock_irqsave(&giu_lock, flags);
+
+ reg = giu_read(offset);
+ if (data == GPIO_DATA_HIGH)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ giu_write(offset, reg);
+
+ spin_unlock_irqrestore(&giu_lock, flags);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(vr41xx_gpio_set_pin);
+
+int vr41xx_gpio_set_direction(unsigned int pin, gpio_direction_t dir)
+{
+ uint16_t offset, mask, reg;
+ unsigned long flags;
+
+ if (pin >= giu_nr_pins)
+ return -EINVAL;
+
+ if (pin < 16) {
+ offset = GIUIOSELL;
+ mask = (uint16_t)1 << pin;
+ } else if (pin < 32) {
+ offset = GIUIOSELH;
+ mask = (uint16_t)1 << (pin - 16);
+ } else {
+ if (giu_flags & GPIO_HAS_OUTPUT_ENABLE) {
+ offset = GIUPODATEN;
+ mask = (uint16_t)1 << (pin - 32);
+ } else {
+ switch (pin) {
+ case 48:
+ offset = GIUPODATH;
+ mask = PIOEN0;
+ break;
+ case 49:
+ offset = GIUPODATH;
+ mask = PIOEN1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ }
+
+ spin_lock_irqsave(&giu_lock, flags);
+
+ reg = giu_read(offset);
+ if (dir == GPIO_OUTPUT)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ giu_write(offset, reg);
+
+ spin_unlock_irqrestore(&giu_lock, flags);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(vr41xx_gpio_set_direction);
+
+int vr41xx_gpio_pullupdown(unsigned int pin, gpio_pull_t pull)
+{
+ uint16_t reg, mask;
+ unsigned long flags;
+
+ if ((giu_flags & GPIO_HAS_PULLUPDOWN_IO) != GPIO_HAS_PULLUPDOWN_IO)
+ return -EPERM;
+
+ if (pin >= 15)
+ return -EINVAL;
+
+ mask = (uint16_t)1 << pin;
+
+ spin_lock_irqsave(&giu_lock, flags);
+
+ if (pull == GPIO_PULL_UP || pull == GPIO_PULL_DOWN) {
+ reg = giu_read(GIUTERMUPDN);
+ if (pull == GPIO_PULL_UP)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ giu_write(GIUTERMUPDN, reg);
+
+ reg = giu_read(GIUUSEUPDN);
+ reg |= mask;
+ giu_write(GIUUSEUPDN, reg);
+ } else {
+ reg = giu_read(GIUUSEUPDN);
+ reg &= ~mask;
+ giu_write(GIUUSEUPDN, reg);
+ }
+
+ spin_unlock_irqrestore(&giu_lock, flags);
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(vr41xx_gpio_pullupdown);
+
+static ssize_t gpio_read(struct file *file, char __user *buf, size_t len,
+ loff_t *ppos)
+{
+ unsigned int pin;
+ char value = '0';
+
+ pin = iminor(file->f_dentry->d_inode);
+ if (pin >= giu_nr_pins)
+ return -EBADF;
+
+ if (vr41xx_gpio_get_pin(pin) == GPIO_DATA_HIGH)
+ value = '1';
+
+ if (len <= 0)
+ return -EFAULT;
+
+ if (put_user(value, buf))
+ return -EFAULT;
+
+ return 1;
+}
+
+static ssize_t gpio_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ unsigned int pin;
+ size_t i;
+ char c;
+ int retval = 0;
+
+ pin = iminor(file->f_dentry->d_inode);
+ if (pin >= giu_nr_pins)
+ return -EBADF;
+
+ for (i = 0; i < len; i++) {
+ if (get_user(c, data + i))
+ return -EFAULT;
+
+ switch (c) {
+ case '0':
+ retval = vr41xx_gpio_set_pin(pin, GPIO_DATA_LOW);
+ break;
+ case '1':
+ retval = vr41xx_gpio_set_pin(pin, GPIO_DATA_HIGH);
+ break;
+ case 'D':
+ printk(KERN_INFO "GPIO%d: pull down\n", pin);
+ retval = vr41xx_gpio_pullupdown(pin, GPIO_PULL_DOWN);
+ break;
+ case 'd':
+ printk(KERN_INFO "GPIO%d: pull up/down disable\n", pin);
+ retval = vr41xx_gpio_pullupdown(pin, GPIO_PULL_DISABLE);
+ break;
+ case 'I':
+ printk(KERN_INFO "GPIO%d: input\n", pin);
+ retval = vr41xx_gpio_set_direction(pin, GPIO_INPUT);
+ break;
+ case 'O':
+ printk(KERN_INFO "GPIO%d: output\n", pin);
+ retval = vr41xx_gpio_set_direction(pin, GPIO_OUTPUT);
+ break;
+ case 'o':
+ printk(KERN_INFO "GPIO%d: output disable\n", pin);
+ retval = vr41xx_gpio_set_direction(pin, GPIO_OUTPUT_DISABLE);
+ break;
+ case 'P':
+ printk(KERN_INFO "GPIO%d: pull up\n", pin);
+ retval = vr41xx_gpio_pullupdown(pin, GPIO_PULL_UP);
+ break;
+ case 'p':
+ printk(KERN_INFO "GPIO%d: pull up/down disable\n", pin);
+ retval = vr41xx_gpio_pullupdown(pin, GPIO_PULL_DISABLE);
+ break;
+ default:
+ break;
+ }
+
+ if (retval < 0)
+ break;
+ }
+
+ return i;
+}
+
+static int gpio_open(struct inode *inode, struct file *file)
+{
+ unsigned int pin;
+
+ pin = iminor(inode);
+ if (pin >= giu_nr_pins)
+ return -EBADF;
+
+ return nonseekable_open(inode, file);
+}
+
+static int gpio_release(struct inode *inode, struct file *file)
+{
+ unsigned int pin;
+
+ pin = iminor(inode);
+ if (pin >= giu_nr_pins)
+ return -EBADF;
+
+ return 0;
+}
+
+static struct file_operations gpio_fops = {
+ .owner = THIS_MODULE,
+ .read = gpio_read,
+ .write = gpio_write,
+ .open = gpio_open,
+ .release = gpio_release,
+};
+
+static int giu_probe(struct device *dev)
+{
+ unsigned long start, size, flags = 0;
+ unsigned int nr_pins = 0;
+ struct resource *res1, *res2 = NULL;
+ void *base;
+ int retval, i;
+
+ switch (current_cpu_data.cputype) {
+ case CPU_VR4111:
+ case CPU_VR4121:
+ start = GIU_TYPE1_START;
+ size = GIU_TYPE1_SIZE;
+ flags = GPIO_HAS_PULLUPDOWN_IO;
+ nr_pins = 50;
+ break;
+ case CPU_VR4122:
+ case CPU_VR4131:
+ start = GIU_TYPE2_START;
+ size = GIU_TYPE2_SIZE;
+ nr_pins = 36;
+ break;
+ case CPU_VR4133:
+ start = GIU_TYPE3_START;
+ size = GIU_TYPE3_SIZE;
+ flags = GPIO_HAS_INTERRUPT_EDGE_SELECT;
+ nr_pins = 48;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ res1 = request_mem_region(start, size, "GIU");
+ if (res1 == NULL)
+ return -EBUSY;
+
+ base = ioremap(start, size);
+ if (base == NULL) {
+ release_resource(res1);
+ return -ENOMEM;
+ }
+
+ if (flags & GPIO_HAS_PULLUPDOWN_IO) {
+ res2 = request_mem_region(GIU_PULLUPDOWN_START, GIU_PULLUPDOWN_SIZE, "GIU");
+ if (res2 == NULL) {
+ iounmap(base);
+ release_resource(res1);
+ return -EBUSY;
+ }
+ }
+
+ retval = register_chrdev(major, "GIU", &gpio_fops);
+ if (retval < 0) {
+ iounmap(base);
+ release_resource(res1);
+ release_resource(res2);
+ return retval;
+ }
+
+ if (major == 0) {
+ major = retval;
+ printk(KERN_INFO "GIU: major number %d\n", major);
+ }
+
+ spin_lock_init(&giu_lock);
+ giu_base = base;
+ giu_resource1 = res1;
+ giu_resource2 = res2;
+ giu_flags = flags;
+ giu_nr_pins = nr_pins;
+
+ giu_write(GIUINTENL, 0);
+ giu_write(GIUINTENH, 0);
+
+ for (i = GIU_IRQ_BASE; i <= GIU_IRQ_LAST; i++) {
+ if (i < GIU_IRQ(GIUINT_HIGH_OFFSET))
+ irq_desc[i].handler = &giuint_low_irq_type;
+ else
+ irq_desc[i].handler = &giuint_high_irq_type;
+ }
+
+ return cascade_irq(GIUINT_IRQ, giu_get_irq);
+}
+
+static int giu_remove(struct device *dev)
+{
+ iounmap(giu_base);
+
+ release_resource(giu_resource1);
+ if (giu_flags & GPIO_HAS_PULLUPDOWN_IO)
+ release_resource(giu_resource2);
+
+ return 0;
+}
+
+static struct platform_device *giu_platform_device;
+
+static struct device_driver giu_device_driver = {
+ .name = "GIU",
+ .bus = &platform_bus_type,
+ .probe = giu_probe,
+ .remove = giu_remove,
+};
+
+static int __devinit vr41xx_giu_init(void)
+{
+ int retval;
+
+ giu_platform_device = platform_device_register_simple("GIU", -1, NULL, 0);
+ if (IS_ERR(giu_platform_device))
+ return PTR_ERR(giu_platform_device);
+
+ retval = driver_register(&giu_device_driver);
+ if (retval < 0)
+ platform_device_unregister(giu_platform_device);
+
+ return retval;
+}
+
+static void __devexit vr41xx_giu_exit(void)
+{
+ driver_unregister(&giu_device_driver);
+
+ platform_device_unregister(giu_platform_device);
+}
+
+module_init(vr41xx_giu_init);
+module_exit(vr41xx_giu_exit);
diff -urN -X dontdiff git5-orig/include/asm-mips/vr41xx/giu.h git5/include/asm-mips/vr41xx/giu.h
--- git5-orig/include/asm-mips/vr41xx/giu.h Thu Jan 1 09:00:00 1970
+++ git5/include/asm-mips/vr41xx/giu.h Sun Jun 12 02:37:20 2005
@@ -0,0 +1,69 @@
+/*
+ * Include file for NEC VR4100 series General-purpose I/O Unit.
+ *
+ * Copyright (C) 2005 Yoichi Yuasa <yuasa@xxxxxxxxxxxxxx>
+ *
+ * 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
+ */
+#ifndef __NEC_VR41XX_GIU_H
+#define __NEC_VR41XX_GIU_H
+
+typedef enum {
+ IRQ_TRIGGER_LEVEL,
+ IRQ_TRIGGER_EDGE,
+ IRQ_TRIGGER_EDGE_FALLING,
+ IRQ_TRIGGER_EDGE_RISING,
+} irq_trigger_t;
+
+typedef enum {
+ IRQ_SIGNAL_THROUGH,
+ IRQ_SIGNAL_HOLD,
+} irq_signal_t;
+
+extern void vr41xx_set_irq_trigger(unsigned int pin, irq_trigger_t trigger, irq_signal_t signal);
+
+typedef enum {
+ IRQ_LEVEL_LOW,
+ IRQ_LEVEL_HIGH,
+} irq_level_t;
+
+extern void vr41xx_set_irq_level(unsigned int pin, irq_level_t level);
+
+typedef enum {
+ GPIO_DATA_LOW,
+ GPIO_DATA_HIGH,
+ GPIO_DATA_INVAL,
+} gpio_data_t;
+
+extern gpio_data_t vr41xx_gpio_get_pin(unsigned int pin);
+extern int vr41xx_gpio_set_pin(unsigned int pin, gpio_data_t data);
+
+typedef enum {
+ GPIO_INPUT,
+ GPIO_OUTPUT,
+ GPIO_OUTPUT_DISABLE,
+} gpio_direction_t;
+
+extern int vr41xx_gpio_set_direction(unsigned int pin, gpio_direction_t dir);
+
+typedef enum {
+ GPIO_PULL_DOWN,
+ GPIO_PULL_UP,
+ GPIO_PULL_DISABLE,
+} gpio_pull_t;
+
+extern int vr41xx_gpio_pullupdown(unsigned int pin, gpio_pull_t pull);
+
+#endif /* __NEC_VR41XX_GIU_H */
diff -urN -X dontdiff git5-orig/include/asm-mips/vr41xx/vr41xx.h git5/include/asm-mips/vr41xx/vr41xx.h
--- git5-orig/include/asm-mips/vr41xx/vr41xx.h Tue Jun 7 00:22:29 2005
+++ git5/include/asm-mips/vr41xx/vr41xx.h Sun Jun 12 02:37:20 2005
@@ -126,7 +126,6 @@
#define GIU_IRQ_BASE 40
#define GIU_IRQ(x) (GIU_IRQ_BASE + (x)) /* IRQ 40-71 */
#define GIU_IRQ_LAST GIU_IRQ(31)
-#define GIU_IRQ_TO_PIN(x) ((x) - GIU_IRQ_BASE) /* Pin 0-31 */
extern int vr41xx_set_intassign(unsigned int irq, unsigned char intassign);
extern int vr41xx_cascade_irq(unsigned int irq, int (*get_irq_number)(int irq));
@@ -196,39 +195,5 @@
extern void vr41xx_enable_bcuint(void);
extern void vr41xx_disable_bcuint(void);
-
-/*
- * General-Purpose I/O Unit
- */
-enum {
- TRIGGER_LEVEL,
- TRIGGER_EDGE,
- TRIGGER_EDGE_FALLING,
- TRIGGER_EDGE_RISING
-};
-
-enum {
- SIGNAL_THROUGH,
- SIGNAL_HOLD
-};
-
-extern void vr41xx_set_irq_trigger(int pin, int trigger, int hold);
-
-enum {
- LEVEL_LOW,
- LEVEL_HIGH
-};
-
-extern void vr41xx_set_irq_level(int pin, int level);
-
-enum {
- PIO_INPUT,
- PIO_OUTPUT
-};
-
-enum {
- DATA_LOW,
- DATA_HIGH
-};
#endif /* __NEC_VR41XX_H */
-
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