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242 lines
6.1 KiB
Diff
242 lines
6.1 KiB
Diff
diff -urN linux-2.6.16.7/arch/mips/au1000/mtx-1/irqmap.c linux-2.6.16.7.new/arch/mips/au1000/mtx-1/irqmap.c
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--- linux-2.6.16.7/arch/mips/au1000/mtx-1/irqmap.c 2006-04-17 23:53:25.000000000 +0200
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+++ linux-2.6.16.7.new/arch/mips/au1000/mtx-1/irqmap.c 2006-04-23 11:54:31.000000000 +0200
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@@ -64,6 +64,7 @@
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{ AU1500_GPIO_202, INTC_INT_LOW_LEVEL, 0 },
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{ AU1500_GPIO_203, INTC_INT_LOW_LEVEL, 0 },
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{ AU1500_GPIO_205, INTC_INT_LOW_LEVEL, 0 },
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+ { AU1500_GPIO_207, INTC_INT_RISE_AND_FALL_EDGE, 0 },
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};
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int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t);
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diff -urN linux-2.6.16.7/arch/mips/au1000/mtx-1/Makefile linux-2.6.16.7.new/arch/mips/au1000/mtx-1/Makefile
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--- linux-2.6.16.7/arch/mips/au1000/mtx-1/Makefile 2006-04-17 23:53:25.000000000 +0200
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+++ linux-2.6.16.7.new/arch/mips/au1000/mtx-1/Makefile 2006-04-23 14:01:36.000000000 +0200
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@@ -8,3 +8,4 @@
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#
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lib-y := init.o board_setup.o irqmap.o
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+obj-y := mtx-1_sysbtn.o
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diff -urN linux-2.6.16.7/arch/mips/au1000/mtx-1/mtx-1_sysbtn.c linux-2.6.16.7.new/arch/mips/au1000/mtx-1/mtx-1_sysbtn.c
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--- linux-2.6.16.7/arch/mips/au1000/mtx-1/mtx-1_sysbtn.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.16.7.new/arch/mips/au1000/mtx-1/mtx-1_sysbtn.c 2006-04-23 14:01:17.000000000 +0200
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@@ -0,0 +1,218 @@
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+/*
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+ * Driver for the MTX-1 System Button.
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+ *
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+ * (c) Copyright 2005 4G Systems <info@4g-systems.biz>, All Rights Reserved.
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+ * http://www.4g-systems.biz
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version
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+ * 2 of the License, or (at your option) any later version.
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+ *
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+ * Neither Michael Stickel nor 4G Systeme GmbH admit liability nor provide
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+ * warranty for any of this software. This material is provided
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+ * "AS-IS" and at no charge.
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+ *
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+ * (c) Copyright 2005 4G Systems <info@4g-systems.biz>
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+ *
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+ * Release 0.01.
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+ *
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+ * Author: Michael Stickel michael.stickel@4g-systems.biz
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+ *
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+ *
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+ * After the module is loaded there is a device /dev/misc/btn
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+ * that can be read. It returns one char '1' if the button
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+ * has been pressed an '0' if it has been released.
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+ */
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+#include <linux/config.h>
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+#include <linux/module.h>
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+#include <linux/version.h>
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+#include <linux/types.h>
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+#include <linux/errno.h>
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+#include <linux/kernel.h>
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+#include <linux/poll.h>
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+#include <linux/sched.h>
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+#include <linux/miscdevice.h>
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+#include <linux/slab.h>
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+#include <linux/init.h>
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+#include <linux/irq.h>
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+#include <linux/interrupt.h>
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+
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+#include <asm/uaccess.h>
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+
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+#include <asm/mach-au1x00/au1000.h>
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+
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+
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+#ifndef FALSE
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+# define FALSE (0)
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+#endif
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+
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+#ifndef TRUE
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+# define TRUE (!FALSE)
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+#endif
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+
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+
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+//---------[ declarations ]-----------------
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+
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+
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+static DECLARE_WAIT_QUEUE_HEAD(mtx1btn_wait_queue);
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+static char state_changed;
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+static char last_value;
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+static char is_inuse;
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+
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+
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+//---------[ Hardware Functions ]-----------------
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+
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+// The MTX-1 Button is attached to GPIO207.
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+#define MTX1_GPIO2_SYSBTN (7)
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+#define MTX1_SYSBTN_IRQ (AU1500_GPIO_207)
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+
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+
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+static char mtx1_getbtn (int btnno)
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+{
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+ if (btnno==0) {
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+ return (au_readl(GPIO2_PINSTATE) & (1<<MTX1_GPIO2_SYSBTN)) ? 0 : 1;
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+ }
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+ return 0;
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+}
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+
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+static void mtx1_initbuttons (void)
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+{
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+ au_writel (au_readl(GPIO2_DIR) & ~(1<<MTX1_GPIO2_SYSBTN), GPIO2_DIR);
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+}
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+
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+
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+//---------[ Interrupt handling ]-----------------
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+
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+
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+static void mtx1_btn_interrupt (int irq, void *private, struct pt_regs *regs)
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+{
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+ char value = mtx1_getbtn(0);
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+ if (last_value != value)
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+ {
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+ last_value = value;
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+ state_changed = 1;
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+ wake_up (&mtx1btn_wait_queue);
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+ }
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+// kill_fasync(&async_queue, SIGIO, POLL_OUT);
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+}
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+
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+
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+static int mtx1_btn_startirq (void)
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+{
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+ if (!request_irq (MTX1_SYSBTN_IRQ, mtx1_btn_interrupt, 0 /* | SA_INTERRUPT */, "mtx1btn", (void *)&state_changed)) {
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+ return 0;
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+ }
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+ return -1;
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+}
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+
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+static int mtx1_btn_stopirq (void)
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+{
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+ free_irq(MTX1_SYSBTN_IRQ, (void *)&state_changed);
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+ return 0;
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+}
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+
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+
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+
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+//---------[ File Functions ]-----------------
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+
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+
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+static int mtx1sysbtn_minor = -1;
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+
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+
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+static int mtx1sysbtn_open (struct inode *inode, struct file *file)
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+{
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+ if (MINOR(inode->i_rdev)!=mtx1sysbtn_minor) return -ENODEV;
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+ if (is_inuse) return -EBUSY;
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+ is_inuse=1;
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+ last_value = mtx1_getbtn(0);
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+ state_changed = 0;
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+ return 0;
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+}
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+
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+
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+static int mtx1sysbtn_release (struct inode *inode, struct file *file) {
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+ if (MINOR(inode->i_rdev)==mtx1sysbtn_minor) {
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+ is_inuse=0;
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+ }
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+ return 0;
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+}
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+
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+
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+static ssize_t mtx1sysbtn_read (struct file *file, char *buf, size_t count, loff_t *ppos)
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+{
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+ if (count < 1)
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+ return -EINVAL;
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+ if (!state_changed)
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+ interruptible_sleep_on (&mtx1btn_wait_queue);
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+ state_changed = 0;
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+ char c = last_value ? '1' : '0'; /* mtx1_getbtn(0) */
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+ if(copy_to_user(buf, &c, 1))
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+ return -EFAULT;
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+ return 1;
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+}
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+
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+
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+static unsigned int mtx1sysbtn_poll (struct file *file, poll_table * wait)
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+{
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+ unsigned int mask = 0;
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+
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+ poll_wait (file, &mtx1btn_wait_queue, wait);
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+
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+ if (state_changed) // state changed since last time.
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+ mask |= POLLIN | POLLRDNORM;
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+
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+ return mask;
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+}
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+
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+
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+static struct file_operations mtx1sysbtn_fops = {
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+ .owner = THIS_MODULE,
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+ .read = mtx1sysbtn_read,
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+ .poll = mtx1sysbtn_poll,
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+ .open = mtx1sysbtn_open,
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+ .release = mtx1sysbtn_release
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+};
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+
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+
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+static struct miscdevice mtx1sysbtn_miscdev = {
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+ MISC_DYNAMIC_MINOR /* SYSBTN_MINOR */ ,
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+ "btn",
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+ &mtx1sysbtn_fops
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+};
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+
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+
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+
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+//---------[ Module Functions ]-----------------
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+
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+
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+void __exit exit_mtx1_sysbtn (void)
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+{
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+ is_inuse = 1;
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+ mtx1_btn_stopirq ();
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+ misc_deregister(&mtx1sysbtn_miscdev);
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+}
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+
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+
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+static int __init init_mtx1_sysbtn (void)
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+{
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+ printk("MTX-1 System Button driver\n");
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+ is_inuse = 1;
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+ mtx1_initbuttons ();
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+ if (misc_register (&mtx1sysbtn_miscdev) >= 0) {
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+ mtx1sysbtn_minor = mtx1sysbtn_miscdev.minor;
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+ if (mtx1_btn_startirq () == 0) {
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+ is_inuse=0;
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+ return 0;
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+ }
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+ misc_deregister(&mtx1sysbtn_miscdev);
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+ }
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+ return 1;
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+}
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+
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+module_init(init_mtx1_sysbtn);
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+module_exit(exit_mtx1_sysbtn);
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+
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+MODULE_AUTHOR("Michael Stickel");
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+MODULE_DESCRIPTION("Driver for the MTX-1 system button");
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+MODULE_LICENSE("GPL");
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