mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-28 00:39:23 +02:00
Added GPIO driver
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6534 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
hcg
parent
345fbb3086
commit
552c341208
@ -42,6 +42,7 @@ CONFIG_ARM_THUMB=y
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# CONFIG_AT91_PROGRAMMABLE_CLOCKS is not set
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CONFIG_AT91_SPI=y
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CONFIG_AT91_SPIDEV=y
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CONFIG_AT91_VLIO=y
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# CONFIG_ATM_DUMMY is not set
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# CONFIG_ATM_TCP is not set
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CONFIG_BASE_SMALL=0
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357
target/linux/at91-2.6/patches/003-gpio-driver.patch
Normal file
357
target/linux/at91-2.6/patches/003-gpio-driver.patch
Normal file
@ -0,0 +1,357 @@
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diff -urN linux-2.6.19.2.old/arch/arm/mach-at91rm9200/gpio.c linux-2.6.19.2/arch/arm/mach-at91rm9200/gpio.c
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--- linux-2.6.19.2.old/arch/arm/mach-at91rm9200/gpio.c 2007-03-06 22:49:37.000000000 +0100
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+++ linux-2.6.19.2/arch/arm/mach-at91rm9200/gpio.c 2007-03-07 10:25:41.000000000 +0100
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@@ -28,7 +28,7 @@
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static struct at91_gpio_bank *gpio;
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static int gpio_banks;
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-
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+static u32 pio_gpio_pin[4] = { 0, 0, 0, 0 };
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static inline void __iomem *pin_to_controller(unsigned pin)
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{
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@@ -113,10 +113,13 @@
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{
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void __iomem *pio = pin_to_controller(pin);
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unsigned mask = pin_to_mask(pin);
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+ int bank = (pin - PIN_BASE) / 32;
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if (!pio)
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return -EINVAL;
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+ pio_gpio_pin[bank] |= mask;
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+
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__raw_writel(mask, pio + PIO_IDR);
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__raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR));
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__raw_writel(mask, pio + PIO_ODR);
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@@ -134,10 +137,13 @@
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{
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void __iomem *pio = pin_to_controller(pin);
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unsigned mask = pin_to_mask(pin);
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+ int bank = (pin - PIN_BASE) / 32;
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if (!pio)
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return -EINVAL;
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+ pio_gpio_pin[bank] |= mask;
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+
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__raw_writel(mask, pio + PIO_IDR);
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__raw_writel(mask, pio + PIO_PUDR);
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__raw_writel(mask, pio + (value ? PIO_SODR : PIO_CODR));
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@@ -214,6 +220,18 @@
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}
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EXPORT_SYMBOL(at91_get_gpio_value);
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+int at91_is_pin_gpio(unsigned pin)
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+{
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+ void __iomem *pio = pin_to_controller(pin);
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+ unsigned mask = pin_to_mask(pin);
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+ int bank = (pin - PIN_BASE) / 32;
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+
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+ if (!pio)
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+ return -EINVAL;
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+ return (pio_gpio_pin[bank] & mask) != 0;
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+}
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+EXPORT_SYMBOL(at91_is_pin_gpio);
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+
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/*--------------------------------------------------------------------------*/
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#ifdef CONFIG_PM
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diff -urN linux-2.6.19.2.old/drivers/char/Kconfig linux-2.6.19.2/drivers/char/Kconfig
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--- linux-2.6.19.2.old/drivers/char/Kconfig 2007-03-06 22:49:37.000000000 +0100
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+++ linux-2.6.19.2/drivers/char/Kconfig 2007-03-07 01:08:57.000000000 +0100
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@@ -1064,5 +1064,12 @@
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The SPI driver gives user mode access to this serial
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bus on the AT91RM9200 processor.
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+config AT91_VLIO
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+ tristate "Versalink LED and GPIO interface"
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+ depends on ARCH_AT91RM9200 && MACH_VLINK
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+ default n
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+ help
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+ Provides a handler for LED and GPIO in userspace
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+
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endmenu
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diff -urN linux-2.6.19.2.old/drivers/char/Makefile linux-2.6.19.2/drivers/char/Makefile
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--- linux-2.6.19.2.old/drivers/char/Makefile 2007-03-06 22:49:37.000000000 +0100
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+++ linux-2.6.19.2/drivers/char/Makefile 2007-03-07 01:08:05.000000000 +0100
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@@ -92,6 +92,7 @@
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obj-$(CONFIG_TELCLOCK) += tlclk.o
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obj-$(CONFIG_AT91_SPI) += at91_spi.o
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obj-$(CONFIG_AT91_SPIDEV) += at91_spidev.o
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+obj-$(CONFIG_AT91_VLIO) += vlink_giu.o
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obj-$(CONFIG_WATCHDOG) += watchdog/
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obj-$(CONFIG_MWAVE) += mwave/
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diff -urN linux-2.6.19.2.old/drivers/char/vlink_giu.c linux-2.6.19.2/drivers/char/vlink_giu.c
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--- linux-2.6.19.2.old/drivers/char/vlink_giu.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.19.2/drivers/char/vlink_giu.c 2007-03-07 01:21:21.000000000 +0100
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@@ -0,0 +1,256 @@
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+/*
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+ * Driver for FDL Versalink GPIO
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+ *
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+ * Copyright (C) 2005 Guthrie Consulting
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+ * Author: Hamish Guthrie <hamish@prodigi.ch>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/moduleparam.h>
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+#include <linux/init.h>
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+#include <linux/platform_device.h>
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+
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+#include <linux/kernel.h>
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+#include <linux/slab.h>
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+#include <linux/fs.h>
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+#include <linux/errno.h>
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+#include <linux/init.h>
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+#include <linux/types.h>
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+#include <linux/proc_fs.h>
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+#include <linux/fcntl.h>
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+#include <linux/seq_file.h>
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+#include <linux/cdev.h>
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+#include <asm/arch/gpio.h>
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+#include <asm/uaccess.h>
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+
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+static int major; /* default is dynamic major device number */
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+module_param(major, int, 0);
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+MODULE_PARM_DESC(major, "Major device number");
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+
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+#define VIO_NR_DEVS 96
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+
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+struct vio_dev {
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+ struct cdev cdev;
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+};
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+
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+struct vio_dev *vio_devices;
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+static struct class *vio_class;
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+
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+static ssize_t gpio_read(struct file *file, char __user *buf, size_t len,
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+ loff_t *ppos)
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+{
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+ unsigned int pin;
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+ int retval;
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+ char value = '0';
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+
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+ pin = iminor(file->f_dentry->d_inode);
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+
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+ retval = at91_get_gpio_value(PIN_BASE + pin);
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+ if (retval < 0)
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+ return -EFAULT;
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+
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+ value = retval + 0x30;
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+ if (put_user(value, buf))
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+ return -EFAULT;
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+
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+ return 1;
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+}
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+
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+static ssize_t gpio_write(struct file *file, const char __user *data,
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+ size_t len, loff_t *ppos)
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+{
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+ unsigned int pin;
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+ size_t i;
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+ char c;
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+ int retval = 0;
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+
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+ pin = iminor(file->f_dentry->d_inode);
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+
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+ for (i = 0; i < len; i++) {
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+ if (get_user(c, data + i))
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+ return -EFAULT;
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+
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+ switch (c) {
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+ case '0':
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+ case '1':
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+ retval = at91_set_gpio_value(PIN_BASE + pin, (int)c - 0x30);
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+ if (retval < 0)
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+ return -EFAULT;
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+ break;
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+ default:
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+ break;
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+ }
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+
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+ if (retval < 0)
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+ break;
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+ }
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+
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+ return i;
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+}
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+
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+static int gpio_open(struct inode *inode, struct file *file)
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+{
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+ return nonseekable_open(inode, file);
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+}
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+
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+static int gpio_release(struct inode *inode, struct file *file)
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+{
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+ return 0;
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+}
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+
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+static struct file_operations vio_fops = {
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+ .owner = THIS_MODULE,
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+ .read = gpio_read,
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+ .write = gpio_write,
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+ .open = gpio_open,
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+ .release = gpio_release,
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+};
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+
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+static void vio_setup_cdev(struct vio_dev *dev, int index)
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+{
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+ int err, devno = MKDEV(major, index);
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+
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+ cdev_init(&dev->cdev, &vio_fops);
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+ dev->cdev.owner = THIS_MODULE;
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+ dev->cdev.ops = &vio_fops;
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+ err = cdev_add (&dev->cdev, devno, 1);
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+ if (err)
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+ printk(KERN_NOTICE "vio: Error %d adding vio%d", err, index);
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+}
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+
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+static int vio_remove(struct platform_device *dev)
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+{
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+ int i;
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+ dev_t devno = MKDEV(major, 0);
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+
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+ if (vio_devices) {
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+ for(i=0; i<VIO_NR_DEVS; i++) {
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+ int iodev = at91_is_pin_gpio(PIN_BASE + i);
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+ if (iodev) {
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+ cdev_del(&vio_devices[i].cdev);
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+ class_device_destroy(vio_class, MKDEV(major, i));
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+ }
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+ }
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+ kfree(vio_devices);
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+ }
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+
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+ class_destroy(vio_class);
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+ unregister_chrdev_region(devno, VIO_NR_DEVS);
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+
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+ platform_set_drvdata(dev, NULL);
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+
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+ return 0;
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+}
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+
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+static int vio_probe(struct platform_device *dev)
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+{
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+ int retval, i, j;
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+ dev_t vdev = 0;
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+
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+ if (major) {
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+ vdev = MKDEV(major, 0);
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+ retval = register_chrdev_region(vdev, VIO_NR_DEVS, "vio");
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+ } else {
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+ retval = alloc_chrdev_region(&vdev, 0, VIO_NR_DEVS, "vio");
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+ major = MAJOR(vdev);
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+ }
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+ if (retval < 0) {
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+ printk(KERN_WARNING "vio: can't get major %d\n", major);
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+ return retval;
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+ }
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+
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+ if (major == 0) {
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+ major = retval;
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+ printk(KERN_INFO "vio: major number %d\n", major);
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+ }
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+
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+ vio_class = class_create(THIS_MODULE, "vio");
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+
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+ if (IS_ERR(vio_class)) {
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+ printk(KERN_ERR "vio: Error creating vio class\n");
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+ vio_remove(dev);
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+ return PTR_ERR(vio_class);
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+ }
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+
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+ vio_devices = kmalloc(VIO_NR_DEVS * sizeof(struct vio_dev), GFP_KERNEL);
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+ if (!vio_devices) {
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+ retval = -ENOMEM;
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+ goto fail;
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+ }
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+ memset(vio_devices, 0, VIO_NR_DEVS * sizeof(struct vio_dev));
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+
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+ for (i=0; i<VIO_NR_DEVS/32; i++)
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+ for(j=0; j<32; j++) {
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+ int iodev = at91_is_pin_gpio(PIN_BASE + i*32 + j);
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+ if (iodev) {
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+ vio_setup_cdev(&vio_devices[i*32 + j], i*32 + j);
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+ class_device_create(vio_class, NULL, MKDEV(major, i*32 + j), NULL,
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+ "vio%c%d", i + 'A', j);
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+ }
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+ }
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+
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+ platform_set_drvdata(dev, vio_devices);
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+
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+ return 0;
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+
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+fail:
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+ vio_remove(dev);
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+ return retval;
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+}
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+
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+static struct platform_device *vio_platform_device;
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+
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+static struct platform_driver vio_driver = {
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+ .probe = vio_probe,
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+ .remove = vio_remove,
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+ .driver = {
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+ .name = "vio",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+static int __init vio_init(void)
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+{
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+ int retval;
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+
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+ vio_platform_device = platform_device_register_simple("vio", -1, NULL, 0);
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+ if (IS_ERR(vio_platform_device)) {
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+ printk(KERN_WARNING "vio: device registration failed\n");
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+ return PTR_ERR(vio_platform_device);
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+ }
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+
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+ retval = platform_driver_register(&vio_driver);
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+ if (retval < 0) {
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+ printk(KERN_WARNING "vio: driver registration failed\n");
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+ platform_device_unregister(vio_platform_device);
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+ }
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+
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+ return retval;
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+}
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+
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+static void __exit vio_exit(void)
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+{
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+ platform_driver_unregister(&vio_driver);
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+ platform_device_unregister(vio_platform_device);
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+}
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+
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+module_init(vio_init);
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+module_exit(vio_exit);
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+
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+MODULE_AUTHOR("Hamish Guthrie <hamish@prodigi.ch>");
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+MODULE_DESCRIPTION("FDL Versalink GPIO Driver");
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+MODULE_LICENSE("GPL");
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diff -urN linux-2.6.19.2.old/include/asm-arm/arch-at91rm9200/gpio.h linux-2.6.19.2/include/asm-arm/arch-at91rm9200/gpio.h
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--- linux-2.6.19.2.old/include/asm-arm/arch-at91rm9200/gpio.h 2007-01-10 20:10:37.000000000 +0100
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+++ linux-2.6.19.2/include/asm-arm/arch-at91rm9200/gpio.h 2007-03-07 01:17:23.000000000 +0100
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@@ -189,6 +189,7 @@
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/* callable at any time */
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extern int at91_set_gpio_value(unsigned pin, int value);
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extern int at91_get_gpio_value(unsigned pin);
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+extern int at91_is_pin_gpio(unsigned pin);
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/* callable only from core power-management code */
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extern void at91_gpio_suspend(void);
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