diff options
Diffstat (limited to 'target/linux/au1000-2.6/patches/006-mtx1_system_button.patch')
| -rw-r--r-- | target/linux/au1000-2.6/patches/006-mtx1_system_button.patch | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/target/linux/au1000-2.6/patches/006-mtx1_system_button.patch b/target/linux/au1000-2.6/patches/006-mtx1_system_button.patch new file mode 100644 index 0000000000..511df2c8da --- /dev/null +++ b/target/linux/au1000-2.6/patches/006-mtx1_system_button.patch @@ -0,0 +1,241 @@ +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 +--- linux-2.6.16.7/arch/mips/au1000/mtx-1/irqmap.c 2006-04-17 23:53:25.000000000 +0200 ++++ linux-2.6.16.7.new/arch/mips/au1000/mtx-1/irqmap.c 2006-04-23 11:54:31.000000000 +0200 +@@ -64,6 +64,7 @@ + { AU1500_GPIO_202, INTC_INT_LOW_LEVEL, 0 }, + { AU1500_GPIO_203, INTC_INT_LOW_LEVEL, 0 }, + { AU1500_GPIO_205, INTC_INT_LOW_LEVEL, 0 }, ++ { AU1500_GPIO_207, INTC_INT_RISE_AND_FALL_EDGE, 0 }, + }; + + int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t); +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 +--- linux-2.6.16.7/arch/mips/au1000/mtx-1/Makefile 2006-04-17 23:53:25.000000000 +0200 ++++ linux-2.6.16.7.new/arch/mips/au1000/mtx-1/Makefile 2006-04-23 14:01:36.000000000 +0200 +@@ -8,3 +8,4 @@ + # + + lib-y := init.o board_setup.o irqmap.o ++obj-y := mtx-1_sysbtn.o +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 +--- linux-2.6.16.7/arch/mips/au1000/mtx-1/mtx-1_sysbtn.c 1970-01-01 01:00:00.000000000 +0100 ++++ linux-2.6.16.7.new/arch/mips/au1000/mtx-1/mtx-1_sysbtn.c 2006-04-23 14:01:17.000000000 +0200 +@@ -0,0 +1,218 @@ ++/* ++ * Driver for the MTX-1 System Button. ++ * ++ * (c) Copyright 2005 4G Systems <info@4g-systems.biz>, All Rights Reserved. ++ * http://www.4g-systems.biz ++ * ++ * 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. ++ * ++ * Neither Michael Stickel nor 4G Systeme GmbH admit liability nor provide ++ * warranty for any of this software. This material is provided ++ * "AS-IS" and at no charge. ++ * ++ * (c) Copyright 2005 4G Systems <info@4g-systems.biz> ++ * ++ * Release 0.01. ++ * ++ * Author: Michael Stickel michael.stickel@4g-systems.biz ++ * ++ * ++ * After the module is loaded there is a device /dev/misc/btn ++ * that can be read. It returns one char '1' if the button ++ * has been pressed an '0' if it has been released. ++ */ ++#include <linux/config.h> ++#include <linux/module.h> ++#include <linux/version.h> ++#include <linux/types.h> ++#include <linux/errno.h> ++#include <linux/kernel.h> ++#include <linux/poll.h> ++#include <linux/sched.h> ++#include <linux/miscdevice.h> ++#include <linux/slab.h> ++#include <linux/init.h> ++#include <linux/irq.h> ++#include <linux/interrupt.h> ++ ++#include <asm/uaccess.h> ++ ++#include <asm/mach-au1x00/au1000.h> ++ ++ ++#ifndef FALSE ++# define FALSE (0) ++#endif ++ ++#ifndef TRUE ++# define TRUE (!FALSE) ++#endif ++ ++ ++//---------[ declarations ]----------------- ++ ++ ++static DECLARE_WAIT_QUEUE_HEAD(mtx1btn_wait_queue); ++static char state_changed; ++static char last_value; ++static char is_inuse; ++ ++ ++//---------[ Hardware Functions ]----------------- ++ ++// The MTX-1 Button is attached to GPIO207. ++#define MTX1_GPIO2_SYSBTN (7) ++#define MTX1_SYSBTN_IRQ (AU1500_GPIO_207) ++ ++ ++static char mtx1_getbtn (int btnno) ++{ ++ if (btnno==0) { ++ return (au_readl(GPIO2_PINSTATE) & (1<<MTX1_GPIO2_SYSBTN)) ? 0 : 1; ++ } ++ return 0; ++} ++ ++static void mtx1_initbuttons (void) ++{ ++ au_writel (au_readl(GPIO2_DIR) & ~(1<<MTX1_GPIO2_SYSBTN), GPIO2_DIR); ++} ++ ++ ++//---------[ Interrupt handling ]----------------- ++ ++ ++static void mtx1_btn_interrupt (int irq, void *private, struct pt_regs *regs) ++{ ++ char value = mtx1_getbtn(0); ++ if (last_value != value) ++ { ++ last_value = value; ++ state_changed = 1; ++ wake_up (&mtx1btn_wait_queue); ++ } ++// kill_fasync(&async_queue, SIGIO, POLL_OUT); ++} ++ ++ ++static int mtx1_btn_startirq (void) ++{ ++ if (!request_irq (MTX1_SYSBTN_IRQ, mtx1_btn_interrupt, 0 /* | SA_INTERRUPT */, "mtx1btn", (void *)&state_changed)) { ++ return 0; ++ } ++ return -1; ++} ++ ++static int mtx1_btn_stopirq (void) ++{ ++ free_irq(MTX1_SYSBTN_IRQ, (void *)&state_changed); ++ return 0; ++} ++ ++ ++ ++//---------[ File Functions ]----------------- ++ ++ ++static int mtx1sysbtn_minor = -1; ++ ++ ++static int mtx1sysbtn_open (struct inode *inode, struct file *file) ++{ ++ if (MINOR(inode->i_rdev)!=mtx1sysbtn_minor) return -ENODEV; ++ if (is_inuse) return -EBUSY; ++ is_inuse=1; ++ last_value = mtx1_getbtn(0); ++ state_changed = 0; ++ return 0; ++} ++ ++ ++static int mtx1sysbtn_release (struct inode *inode, struct file *file) { ++ if (MINOR(inode->i_rdev)==mtx1sysbtn_minor) { ++ is_inuse=0; ++ } ++ return 0; ++} ++ ++ ++static ssize_t mtx1sysbtn_read (struct file *file, char *buf, size_t count, loff_t *ppos) ++{ ++ if (count < 1) ++ return -EINVAL; ++ if (!state_changed) ++ interruptible_sleep_on (&mtx1btn_wait_queue); ++ state_changed = 0; ++ char c = last_value ? '1' : '0'; /* mtx1_getbtn(0) */ ++ if(copy_to_user(buf, &c, 1)) ++ return -EFAULT; ++ return 1; ++} ++ ++ ++static unsigned int mtx1sysbtn_poll (struct file *file, poll_table * wait) ++{ ++ unsigned int mask = 0; ++ ++ poll_wait (file, &mtx1btn_wait_queue, wait); ++ ++ if (state_changed) // state changed since last time. ++ mask |= POLLIN | POLLRDNORM; ++ ++ return mask; ++} ++ ++ ++static struct file_operations mtx1sysbtn_fops = { ++ .owner = THIS_MODULE, ++ .read = mtx1sysbtn_read, ++ .poll = mtx1sysbtn_poll, ++ .open = mtx1sysbtn_open, ++ .release = mtx1sysbtn_release ++}; ++ ++ ++static struct miscdevice mtx1sysbtn_miscdev = { ++ MISC_DYNAMIC_MINOR /* SYSBTN_MINOR */ , ++ "btn", ++ &mtx1sysbtn_fops ++}; ++ ++ ++ ++//---------[ Module Functions ]----------------- ++ ++ ++void __exit exit_mtx1_sysbtn (void) ++{ ++ is_inuse = 1; ++ mtx1_btn_stopirq (); ++ misc_deregister(&mtx1sysbtn_miscdev); ++} ++ ++ ++static int __init init_mtx1_sysbtn (void) ++{ ++ printk("MTX-1 System Button driver\n"); ++ is_inuse = 1; ++ mtx1_initbuttons (); ++ if (misc_register (&mtx1sysbtn_miscdev) >= 0) { ++ mtx1sysbtn_minor = mtx1sysbtn_miscdev.minor; ++ if (mtx1_btn_startirq () == 0) { ++ is_inuse=0; ++ return 0; ++ } ++ misc_deregister(&mtx1sysbtn_miscdev); ++ } ++ return 1; ++} ++ ++module_init(init_mtx1_sysbtn); ++module_exit(exit_mtx1_sysbtn); ++ ++MODULE_AUTHOR("Michael Stickel"); ++MODULE_DESCRIPTION("Driver for the MTX-1 system button"); ++MODULE_LICENSE("GPL"); |