path: root/target/linux/at91/patches-2.6.25/003-gpio-driver.patch

--- a/arch/arm/mach-at91/board-vlink.c
+++ b/arch/arm/mach-at91/board-vlink.c
@@ -99,7 +99,7 @@
 */
 
 static struct at91_mmc_data __initdata vlink_mmc_data = {
-//	.det_pin	= AT91_PIN_PB27,
+//	.det_pin	= AT91_PIN_PC10,
 	.slot_b		= 0,
 	.wire4		= 1,
 //	.wp_pin		= AT91_PIN_PA17,
@@ -136,6 +136,7 @@
 
 static void __init vlink_board_init(void)
 {
+	int v100;
 	/* Serial */
 	at91_add_device_serial();
 	/* Ethernet */
@@ -157,36 +158,66 @@
 //	at91_set_gpio_output(AT91_PIN_PB22, 1);	/* this MMC card slot can optionally use SPI signaling (CS3). */
 	at91_add_device_mmc(0, &vlink_mmc_data);
 #endif
+
+// Set VLink version PIN as an input with pull-up (V1.5 = GND)
+	at91_set_gpio_input(AT91_PIN_PC2, 1);
+	v100 = at91_get_gpio_value(AT91_PIN_PC2);
+
 	/* LEDs */
 //	at91_gpio_leds(vlink_leds, ARRAY_SIZE(vlink_leds));
 
 /* Other LED's */
-       at91_set_gpio_output(AT91_PIN_PC7, 1);  // LED FRONT AP1
-       at91_set_gpio_output(AT91_PIN_PC8, 1);  // LED FRONT BP1
-       at91_set_gpio_output(AT91_PIN_PB14, 1); // LED BACK AP1
-       at91_set_gpio_output(AT91_PIN_PB15, 1); // LED BACK BP1
-       at91_set_gpio_output(AT91_PIN_PB16, 1); // LED BACK AP2
-       at91_set_gpio_output(AT91_PIN_PB17, 1); // LED BACK BP2
+	at91_set_gpio_output(AT91_PIN_PC7, 1);  // LED FRONT AP1
+	at91_set_gpio_output(AT91_PIN_PC8, 1);  // LED FRONT BP1
+	at91_set_gpio_output(AT91_PIN_PB14, 1); // LED BACK AP1
+	at91_set_gpio_output(AT91_PIN_PB15, 1); // LED BACK BP1
+	at91_set_gpio_output(AT91_PIN_PB16, 1); // LED BACK AP2
+	at91_set_gpio_output(AT91_PIN_PB17, 1); // LED BACK BP2
+
+/* Test jig presence detection */
+	at91_set_gpio_input(AT91_PIN_PB8, 1);   // JIGPRESENT
 
 /* SIM Cards */
-       at91_set_gpio_output(AT91_PIN_PB9, 1);  // ENBSC3
-       at91_set_gpio_output(AT91_PIN_PB10, 1); // ENBSC2
-       at91_set_gpio_output(AT91_PIN_PB11, 1); // ENBSC1
+	if (at91_get_gpio_value(AT91_PIN_PB8)) {
+		at91_set_gpio_output(AT91_PIN_PB11, 0);
+		if (v100)
+			at91_set_gpio_output(AT91_PIN_PB9, 1);
+		else
+			at91_set_gpio_output(AT91_PIN_PC13, 1);
+	} else {
+		at91_set_gpio_output(AT91_PIN_PB11, 1);
+		if (v100)
+			at91_set_gpio_output(AT91_PIN_PB9, 0);
+		else
+			at91_set_gpio_output(AT91_PIN_PC13, 0);
+	}
 
-/* GSM Module Control */
-       at91_set_gpio_output(AT91_PIN_PB12, 1); // GSMONOFF
+        at91_set_gpio_output(AT91_PIN_PB10, 1); // ENBSC2
 
-/* Test jig presence detection */
-       at91_set_gpio_input(AT91_PIN_PB8, 1);   // JIGPRESENT
+/* GSM Module Control */
+	at91_set_gpio_output(AT91_PIN_PB12, 1); // GSMONOFF
 
 /* Power indicator */
-       at91_set_gpio_input(AT91_PIN_PB22, 1);  // PWR_IND
+	at91_set_gpio_input(AT91_PIN_PB22, 1);  // PWR_IND
 
 /* USB Device control */
-       at91_set_gpio_input(AT91_PIN_PB27, 1);  // UDB_CNX
-       at91_set_gpio_output(AT91_PIN_PB28, 1); // UDB_PUP
-			 at91_set_multi_drive(AT91_PIN_PB28, 1); // Set to multi-drive
-
+	at91_set_gpio_input(AT91_PIN_PB27, 1);  // UDB_CNX
+	at91_set_gpio_output(AT91_PIN_PB28, 1); // UDB_PUP
+	at91_set_multi_drive(AT91_PIN_PB28, 1); // Set to multi-drive
+
+/* USB Power controls */
+
+	if (v100)
+	{       // V100
+		at91_set_gpio_input (AT91_PIN_PC12, 1);   // SD Card present
+	}
+	else
+	{       // DO special things for V1.5
+		at91_set_gpio_output(AT91_PIN_PB9 , 0);   // USB suspend
+		at91_set_gpio_input (AT91_PIN_PC10, 1);   // SD Card present
+		at91_set_gpio_output(AT91_PIN_PC11, 0);   // USB Vin CTRL for modules onboard
+		at91_set_gpio_output(AT91_PIN_PC12, 0);   // SIM control
+	}
 }
 
 MACHINE_START(VLINK, "FDL VersaLink")
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -29,6 +29,7 @@
 
 static struct at91_gpio_bank *gpio;
 static int gpio_banks;
+static u32 pio_gpio_pin[4] = { 0, 0, 0, 0 };
 
 
 static inline void __iomem *pin_to_controller(unsigned pin)
@@ -71,9 +72,13 @@
 {
 	void __iomem	*pio = pin_to_controller(pin);
 	unsigned	mask = pin_to_mask(pin);
+	int bank = (pin - PIN_BASE) / 32;
 
 	if (!pio)
 		return -EINVAL;
+
+	pio_gpio_pin[bank] |= mask;
+
 	__raw_writel(mask, pio + PIO_IDR);
 	__raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR));
 	__raw_writel(mask, pio + PIO_PER);
@@ -130,10 +135,13 @@
 {
 	void __iomem	*pio = pin_to_controller(pin);
 	unsigned	mask = pin_to_mask(pin);
+	int bank = (pin - PIN_BASE) / 32;
 
 	if (!pio)
 		return -EINVAL;
 
+	pio_gpio_pin[bank] |= mask;
+
 	__raw_writel(mask, pio + PIO_IDR);
 	__raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR));
 	__raw_writel(mask, pio + PIO_ODR);
@@ -151,10 +159,13 @@
 {
 	void __iomem	*pio = pin_to_controller(pin);
 	unsigned	mask = pin_to_mask(pin);
+	int bank = (pin - PIN_BASE) / 32;
 
 	if (!pio)
 		return -EINVAL;
 
+	pio_gpio_pin[bank] |= mask;
+
 	__raw_writel(mask, pio + PIO_IDR);
 	__raw_writel(mask, pio + PIO_PUDR);
 	__raw_writel(mask, pio + (value ? PIO_SODR : PIO_CODR));
@@ -262,6 +273,18 @@
 }
 EXPORT_SYMBOL(at91_get_gpio_value);
 
+int at91_is_pin_gpio(unsigned pin)
+{
+	void __iomem  *pio = pin_to_controller(pin);
+	unsigned  mask = pin_to_mask(pin);
+	int     bank = (pin - PIN_BASE) / 32;
+
+	if (!pio)
+		return -EINVAL;
+	return (pio_gpio_pin[bank] & mask) != 0;
+}
+EXPORT_SYMBOL(at91_is_pin_gpio);
+
 /*--------------------------------------------------------------------------*/
 
 #ifdef CONFIG_PM
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1072,5 +1072,12 @@
 	  The SPI driver gives user mode access to this serial
 	  bus on the AT91RM9200 processor.
 
+config AT91_VLIO
+	tristate "Versalink LED and GPIO interface"
+	depends on ARCH_AT91RM9200 && MACH_VLINK
+	default n
+	help
+	  Provides a handler GPIO's in userspace
+
 endmenu
 
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -100,6 +100,7 @@
 obj-$(CONFIG_TELCLOCK)		+= tlclk.o
 obj-$(CONFIG_AT91_SPI)		+= at91_spi.o
 obj-$(CONFIG_AT91_SPIDEV)	+= at91_spidev.o
+obj-$(CONFIG_AT91_VLIO)		+= vlink_giu.o
 
 obj-$(CONFIG_MWAVE)		+= mwave/
 obj-$(CONFIG_AGP)		+= agp/
--- /dev/null
+++ b/drivers/char/vlink_giu.c
@@ -0,0 +1,333 @@
+/*
+ *  Driver for FDL Versalink GPIO
+ *
+ *  Copyright (C) 2005 Guthrie Consulting
+ *	Author: Hamish Guthrie <hamish@prodigi.ch>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/fcntl.h>
+#include <linux/seq_file.h>
+#include <linux/cdev.h>
+#include <asm/arch/gpio.h>
+#include <asm/uaccess.h>
+
+static int major;	/* default is dynamic major device number */
+module_param(major, int, 0);
+MODULE_PARM_DESC(major, "Major device number");
+
+#define VIO_NR_DEVS	96
+
+struct vio_dev {
+	struct cdev cdev;
+};
+
+struct vio_dev *vio_devices;
+static struct class *vio_class;
+
+#define MAX_VIO_NAMES	24
+typedef struct
+{
+	char port;
+	char pin;
+	char name100[10];
+	char name150[10];
+} VIO_NAMES;
+
+VIO_NAMES VioName[MAX_VIO_NAMES] = 
+{ 	// Port, Pin, V100, V150
+	{'A',19,"port1DTR" ,"port1DTR"},
+	{'A',24,"port2DTR" ,"port2DTR"},
+	{'B',8, "jigOn"    ,"jigOn"} ,
+	{'B',9, "enbSC3"   ,"usbSUSPND"},
+	{'B',10,"enbSC2"   ,"enbSC2"},
+	{'B',11,"enbSC1"   ,"enbSC1"},
+	{'B',12,"gsmONOFF" ,"gsmONOFF"},
+	{'B',14,"ledBAP1"  ,"ledBAP1"},
+	{'B',15,"ledBBP1"  ,"ledBBP1"},
+	{'B',16,"ledBAP2"  ,"ledBAP2"},
+	{'B',17,"ledBBP2"  ,"ledBBP2"},
+	{'B',27,"udpCNX"   ,"udpCNX"},
+	{'B',28,"udpPUP"   ,"udpPUP"},
+	{'B',29,"port2DCD" ,"port2DCD"},
+	{'C',2, "vlVer100" ,"vlVer150"},
+	{'C',7, "ledFAP1"  ,"ledFAP1"},
+	{'C',8, "ledFBP1"  ,"ledFBP1"},
+	{'C',10,"vioC10"   ,"sdCardON"},
+	{'C',11,"vioC11"   ,"vusbCTRL"},
+	{'C',12,"sdCardON" ,"simCTRL"},
+	{'C',13,"vioC13"   ,"enbSC3"},
+	{'C',14,"ledFBP2"  ,"ledFBP2"},
+	{'C',15,"ledFAP2"  ,"ledFAP2"},
+	{0,0,"",""}
+};
+
+/*
+{'B',18,"gsmRIO"  ,"gsmRIO"},
+{'B',20,"gsmTX"   ,"gsmTX"},
+{'B',21,"gsmRX"   ,"gsmRX"},
+{'B',22,"gsmPIND" ,"gsmPIND"},
+{'B',23,"gsmDCD"  ,"gsmDCD"},
+{'B',24,"gsmCTS"  ,"gsmCTS"},
+{'B',25,"gsmDSR"  ,"gsmDSR"},
+{'B',26,"gsmRTS"  ,"gsmRTS"},
+*/
+static void lookupPINName(char version100, char *devName, char port, char pin);
+// EOF KWJ + AJE
+
+static ssize_t gpio_read(struct file *file, char __user *buf, size_t len,
+                         loff_t *ppos)
+{
+	unsigned int pin;
+	int retval;
+	char value = '0';
+
+	pin = iminor(file->f_dentry->d_inode);
+
+	retval = at91_get_gpio_value(PIN_BASE + pin);
+	if (retval < 0)
+		return -EFAULT;
+
+	value = retval + 0x30;
+	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);
+
+	for (i = 0; i < len; i++) {
+		if (get_user(c, data + i))
+			return -EFAULT;
+
+		switch (c) {
+		case '0':
+		case '1':
+			retval = at91_set_gpio_value(PIN_BASE + pin, (int)c - 0x30);
+			if (retval < 0)
+				return -EFAULT;
+			break;
+		default:
+			break;
+		}
+
+		if (retval < 0)
+			break;
+	}
+
+	return i;
+}
+
+static int gpio_open(struct inode *inode, struct file *file)
+{
+	return nonseekable_open(inode, file);
+}
+
+static int gpio_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static struct file_operations vio_fops = {
+	.owner		= THIS_MODULE,
+	.read		= gpio_read,
+	.write		= gpio_write,
+	.open		= gpio_open,
+	.release	= gpio_release,
+};
+
+static void vio_setup_cdev(struct vio_dev *dev, int index)
+{
+	int err, devno = MKDEV(major, index);
+
+	cdev_init(&dev->cdev, &vio_fops);
+	dev->cdev.owner = THIS_MODULE;
+	dev->cdev.ops = &vio_fops;
+	err = cdev_add (&dev->cdev, devno, 1);
+	if (err)
+		printk(KERN_NOTICE "vio: Error %d adding vio%d", err, index);
+}
+
+static int vio_remove(struct platform_device *dev)
+{
+	int i;
+	dev_t devno = MKDEV(major, 0);
+
+	if (vio_devices) {
+		for(i=0; i<VIO_NR_DEVS; i++) {
+			int iodev = at91_is_pin_gpio(PIN_BASE + i);
+			if (iodev) {
+				cdev_del(&vio_devices[i].cdev);
+				class_device_destroy(vio_class, MKDEV(major, i));
+			}
+		}
+		kfree(vio_devices);
+	}
+
+	class_destroy(vio_class);
+	unregister_chrdev_region(devno, VIO_NR_DEVS);
+
+	platform_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+static int vio_probe(struct platform_device *dev)
+{
+	int retval, i, j;
+	dev_t vdev = 0;
+	char devName[30];
+	int vlinkV100;
+
+	if (major) {
+		vdev = MKDEV(major, 0);
+		retval = register_chrdev_region(vdev, VIO_NR_DEVS, "vio");
+	} else {
+		retval = alloc_chrdev_region(&vdev, 0, VIO_NR_DEVS, "vio");
+		major = MAJOR(vdev);
+	}
+	if (retval < 0) {
+		printk(KERN_WARNING "vio: can't get major %d\n", major);
+		return retval;
+	}
+
+	if (major == 0) {
+		major = retval;
+		printk(KERN_INFO "vio: major number %d\n", major);
+	}
+
+	vio_class = class_create(THIS_MODULE, "vio");
+
+	if (IS_ERR(vio_class)) {
+		printk(KERN_ERR "vio: Error creating vio class\n");
+		vio_remove(dev);
+		return PTR_ERR(vio_class);
+	}
+
+	vlinkV100 = at91_get_gpio_value(AT91_PIN_PC2); // Denotes V1.5 if GND
+
+	vio_devices = kmalloc(VIO_NR_DEVS * sizeof(struct vio_dev), GFP_KERNEL);
+	if (!vio_devices) {
+		retval = -ENOMEM;
+		goto fail;
+	}
+	memset(vio_devices, 0, VIO_NR_DEVS * sizeof(struct vio_dev));
+
+	for (i=0; i<VIO_NR_DEVS/32; i++)
+		for(j=0; j<32; j++) {
+			int iodev = at91_is_pin_gpio(PIN_BASE + i*32 + j);
+			if (iodev) {
+				vio_setup_cdev(&vio_devices[i*32 + j], i*32 + j);
+				// Lookup name of vio to create
+				lookupPINName(vlinkV100, devName, i, j);
+				class_device_create(vio_class, NULL, MKDEV(major, i*32 + j), NULL, devName);
+			}
+		}
+
+	platform_set_drvdata(dev, vio_devices);
+
+	return 0;
+
+fail:
+	vio_remove(dev);
+	return retval;
+}
+
+static void lookupPINName(char version100, char *devName, char port, char pin)
+{
+	int i = -1;
+	char found = 0;
+	while (!found)
+	{
+		i++;
+		if (i >= MAX_VIO_NAMES)
+			break;
+		if (VioName[i].port == port+'A' && VioName[i].pin == pin)
+		{
+			printk(KERN_ERR "vio++: %c%d=%s\n",VioName[i].port,VioName[i].pin,VioName[i].name150);
+			if (version100)
+				strcpy(devName, VioName[i].name100);
+			else
+				strcpy(devName, VioName[i].name150);
+			found = 1;
+		}
+	}
+	if (!found)
+		sprintf(devName, "vio%c%d", port + 'A', pin);
+}
+	
+static struct platform_device *vio_platform_device;
+
+static struct platform_driver vio_driver = {
+	.probe 		= vio_probe,
+	.remove		= vio_remove,
+	.driver		= {
+		.name	= "vio",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init vio_init(void)
+{
+	int retval;
+
+	vio_platform_device = platform_device_register_simple("vio", -1, NULL, 0);
+	if (IS_ERR(vio_platform_device)) {
+		printk(KERN_WARNING "vio: device registration failed\n");
+		return PTR_ERR(vio_platform_device);
+	}
+
+	retval = platform_driver_register(&vio_driver);
+	if (retval < 0) {
+		printk(KERN_WARNING "vio: driver registration failed\n");
+		platform_device_unregister(vio_platform_device);
+	}
+	
+	return retval;
+}
+
+static void __exit vio_exit(void)
+{
+	platform_driver_unregister(&vio_driver);
+	platform_device_unregister(vio_platform_device);
+}
+
+module_init(vio_init);
+module_exit(vio_exit);
+
+MODULE_AUTHOR("Hamish Guthrie <hamish@prodigi.ch>");
+MODULE_DESCRIPTION("FDL Versalink GPIO Driver");
--- a/include/asm-arm/arch-at91/gpio.h
+++ b/include/asm-arm/arch-at91/gpio.h
@@ -199,6 +199,7 @@
 /* callable at any time */
 extern int at91_set_gpio_value(unsigned pin, int value);
 extern int at91_get_gpio_value(unsigned pin);
+extern int at91_is_pin_gpio(unsigned pin);
 
 /* callable only from core power-management code */
 extern void at91_gpio_suspend(void);