--- /dev/null
+/*
+ * NEC VR4100 series GIU platform device.
+ *
+ * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
+#include <asm/cpu.h>
+#include <asm/vr41xx/giu.h>
+#include <asm/vr41xx/irq.h>
+
+static struct resource giu_50pins_pullupdown_resource[] __initdata = {
+ {
+ .start = 0x0b000100,
+ .end = 0x0b00011f,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 0x0b0002e0,
+ .end = 0x0b0002e3,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = GIUINT_IRQ,
+ .end = GIUINT_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource giu_36pins_resource[] __initdata = {
+ {
+ .start = 0x0f000140,
+ .end = 0x0f00015f,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = GIUINT_IRQ,
+ .end = GIUINT_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource giu_48pins_resource[] __initdata = {
+ {
+ .start = 0x0f000140,
+ .end = 0x0f000167,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = GIUINT_IRQ,
+ .end = GIUINT_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static int __init vr41xx_giu_add(void)
+{
+ struct platform_device *pdev;
+ struct resource *res;
+ unsigned int num;
+ int retval;
+
+ pdev = platform_device_alloc("GIU", -1);
+ if (!pdev)
+ return -ENOMEM;
+
+ switch (current_cpu_data.cputype) {
+ case CPU_VR4111:
+ case CPU_VR4121:
+ pdev->id = GPIO_50PINS_PULLUPDOWN;
+ res = giu_50pins_pullupdown_resource;
+ num = ARRAY_SIZE(giu_50pins_pullupdown_resource);
+ break;
+ case CPU_VR4122:
+ case CPU_VR4131:
+ pdev->id = GPIO_36PINS;
+ res = giu_36pins_resource;
+ num = ARRAY_SIZE(giu_36pins_resource);
+ break;
+ case CPU_VR4133:
+ pdev->id = GPIO_48PINS_EDGE_SELECT;
+ res = giu_48pins_resource;
+ num = ARRAY_SIZE(giu_48pins_resource);
+ break;
+ default:
+ retval = -ENODEV;
+ goto err_free_device;
+ }
+
+ retval = platform_device_add_resources(pdev, res, num);
+ if (retval)
+ goto err_free_device;
+
+ retval = platform_device_add(pdev);
+ if (retval)
+ goto err_free_device;
+
+ return 0;
+
+err_free_device:
+ platform_device_put(pdev);
+
+ return retval;
+}
+device_initcall(vr41xx_giu_add);
* 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/platform_device.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/init.h>
-#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/platform_device.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/irq.h>
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 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;
giu_set(GIUINTHTSELL, mask);
else
giu_clear(GIUINTHTSELL, mask);
- if (current_cpu_data.cputype == CPU_VR4133) {
+ if (giu_flags & GPIO_HAS_INTERRUPT_EDGE_SELECT) {
switch (trigger) {
case IRQ_TRIGGER_EDGE_FALLING:
giu_set(GIUFEDGEINHL, mask);
giu_set(GIUINTHTSELH, mask);
else
giu_clear(GIUINTHTSELH, mask);
- if (current_cpu_data.cputype == CPU_VR4133) {
+ if (giu_flags & GPIO_HAS_INTERRUPT_EDGE_SELECT) {
switch (trigger) {
case IRQ_TRIGGER_EDGE_FALLING:
giu_set(GIUFEDGEINHH, mask);
giu_write(GIUINTSTATH, mask);
}
}
-
EXPORT_SYMBOL_GPL(vr41xx_set_irq_trigger);
void vr41xx_set_irq_level(unsigned int pin, irq_level_t level)
giu_write(GIUINTSTATH, mask);
}
}
-
EXPORT_SYMBOL_GPL(vr41xx_set_irq_level);
gpio_data_t vr41xx_gpio_get_pin(unsigned int pin)
return GPIO_DATA_LOW;
}
-
EXPORT_SYMBOL_GPL(vr41xx_gpio_get_pin);
int vr41xx_gpio_set_pin(unsigned int pin, gpio_data_t data)
return 0;
}
-
EXPORT_SYMBOL_GPL(vr41xx_gpio_set_pin);
int vr41xx_gpio_set_direction(unsigned int pin, gpio_direction_t dir)
return 0;
}
-
EXPORT_SYMBOL_GPL(vr41xx_gpio_set_direction);
int vr41xx_gpio_pullupdown(unsigned int pin, gpio_pull_t pull)
return 0;
}
-
EXPORT_SYMBOL_GPL(vr41xx_gpio_pullupdown);
static ssize_t gpio_read(struct file *file, char __user *buf, size_t len,
static int __devinit giu_probe(struct platform_device *dev)
{
- unsigned long start, size, flags = 0;
- unsigned int nr_pins = 0, trigger, i, pin;
- struct resource *res1, *res2 = NULL;
- void *base;
+ struct resource *res;
+ unsigned int trigger, i, pin;
struct irq_chip *chip;
- int retval;
-
- 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;
+ int irq, retval;
+
+ switch (dev->id) {
+ case GPIO_50PINS_PULLUPDOWN:
+ giu_flags = GPIO_HAS_PULLUPDOWN_IO;
+ giu_nr_pins = 50;
break;
- case CPU_VR4122:
- case CPU_VR4131:
- start = GIU_TYPE2_START;
- size = GIU_TYPE2_SIZE;
- nr_pins = 36;
+ case GPIO_36PINS:
+ giu_nr_pins = 36;
break;
- case CPU_VR4133:
- start = GIU_TYPE3_START;
- size = GIU_TYPE3_SIZE;
- flags = GPIO_HAS_INTERRUPT_EDGE_SELECT;
- nr_pins = 48;
+ case GPIO_48PINS_EDGE_SELECT:
+ giu_flags = GPIO_HAS_INTERRUPT_EDGE_SELECT;
+ giu_nr_pins = 48;
break;
default:
+ printk(KERN_ERR "GIU: unknown ID %d\n", dev->id);
return -ENODEV;
}
- res1 = request_mem_region(start, size, "GIU");
- if (res1 == NULL)
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res)
return -EBUSY;
- base = ioremap(start, size);
- if (base == NULL) {
- release_resource(res1);
+ giu_base = ioremap(res->start, res->end - res->start + 1);
+ if (!giu_base)
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);
+ iounmap(giu_base);
+ giu_base = NULL;
return retval;
}
}
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);
}
- return cascade_irq(GIUINT_IRQ, giu_get_irq);
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0 || irq >= NR_IRQS)
+ return -EBUSY;
+
+ return cascade_irq(irq, giu_get_irq);
}
static int __devexit giu_remove(struct platform_device *dev)
{
- iounmap(giu_base);
-
- release_resource(giu_resource1);
- if (giu_flags & GPIO_HAS_PULLUPDOWN_IO)
- release_resource(giu_resource2);
+ if (giu_base) {
+ iounmap(giu_base);
+ giu_base = NULL;
+ }
return 0;
}
-static struct platform_device *giu_platform_device;
-
static struct platform_driver giu_device_driver = {
.probe = giu_probe,
.remove = __devexit_p(giu_remove),
static int __init vr41xx_giu_init(void)
{
- int retval;
-
- giu_platform_device = platform_device_alloc("GIU", -1);
- if (!giu_platform_device)
- return -ENOMEM;
-
- retval = platform_device_add(giu_platform_device);
- if (retval < 0) {
- platform_device_put(giu_platform_device);
- return retval;
- }
-
- retval = platform_driver_register(&giu_device_driver);
- if (retval < 0)
- platform_device_unregister(giu_platform_device);
-
- return retval;
+ return platform_driver_register(&giu_device_driver);
}
static void __exit vr41xx_giu_exit(void)
{
platform_driver_unregister(&giu_device_driver);
-
- platform_device_unregister(giu_platform_device);
}
module_init(vr41xx_giu_init);
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