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/****************************************************************************
* *
* Copyright (c) 2004 - 2006 Winbond Electronics Corp. All rights reserved. *
* *
****************************************************************************/
/****************************************************************************
*
* FILENAME
* w90n745_keypad.c
*
* VERSION
* 1.0
*
* DESCRIPTION
* The Winbond 64-keyboard driver
*
* DATA STRUCTURES
* None
*
* FUNCTIONS
* None
*
* HISTORY
* 2005/09/09 Ver 1.0 Created by PC34 YHan
*
* REMARK
* None
*************************************************************************/
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/errno.h>
#include <asm/delay.h>
//#include <asm/fcntl.h>
#include <asm/arch/irqs.h>
#include <linux/mm.h>
#include <linux/poll.h>
#include <linux/module.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include "w90n745_keypad.h"
#define MAJOR_NUM 192
static int volatile kpd_get=0;
static int volatile kpd_block=1;
unsigned char DEV_NAME[10] = "Keypad";
typedef struct _keymap
{
short row;
short col;
}keymap;
keymap key __attribute__ ((aligned (4)));
static DECLARE_WAIT_QUEUE_HEAD(read_wait_a);
static void read_task_block()
{
DECLARE_WAITQUEUE(wait, current);
add_wait_queue(&read_wait_a, &wait);
set_current_state(TASK_INTERRUPTIBLE);
schedule();
set_current_state(TASK_RUNNING);
remove_wait_queue(&read_wait_a, &wait);
return ;
}
static void read_task_wake_up(void)
{
wake_up_interruptible(&read_wait_a);
return ;
}
void keypad745_irq(int irq, void *dev_id, struct pt_regs *regs)
{
volatile unsigned int status;
kpd_get=1;
key.row = 0;
key.col = 0;
status = readl(KPISTATUS);
#ifdef KPI_DEBUG
printk("KPI ISR KPISTATUS=0x%08x\n",status);
#endif
if(status&0x00210000)
{
key.row = (status&0x00000078)>>3;
key.col = (status&0x00000007);
}
if(kpd_block)
read_task_wake_up();
return;
}
int keypad745_open(struct inode* i,struct file* f)
{
int result;
int irq;
int old_cfg;
kpd_block=1;
if(f->f_flags & 0x800) //0x800:04000
kpd_block=0;
irq = INT_KEYPAD;
MOD_INC_USE_COUNT;
result = request_irq(irq,keypad745_irq,0,DEV_NAME,NULL);
if(result!=0)
printk("register the keypad_irq failed!\n");
old_cfg=readl(GPIO_CFG);
old_cfg=old_cfg&GPIO_CFG_MASK;
old_cfg=old_cfg|GPIO_CFG_VALUE;
writel(old_cfg,GPIO_CFG);
#ifdef KPI_DEBUG
printk("KPI OPEN:\nKPICONF=0x%08x\nGPIO_CFG=0x%08x\n",readl(KPICONF),readl(GPIO_CFG));
#endif
return 0;
}
int keypad745_close(struct inode* i,struct file* f)
{
MOD_DEC_USE_COUNT;
free_irq(INT_KEYPAD,NULL);
return 0;
}
ssize_t keypad745_read(struct file *filp, char *buff, size_t read_mode, loff_t *offp)
{
kpd_block = read_mode ;
if(kpd_block)
{
read_task_block();
}
if(kpd_get)
{
kpd_get=0;
copy_to_user(buff,(char*)&key,sizeof(keymap));
key.row = 0;
key.col = 0;
return 1;
}
else
return -1;
}
static int keypad745_ioctl(struct inode *inode, struct file *flip,
unsigned int cmd, unsigned long arg)
{
int err = 0;
if(_IOC_TYPE(cmd) != KEYPAD_MAGIC) return -ENOTTY;
if(_IOC_NR(cmd) > KEYPAD_MAXNR) return -ENOTTY;
if(_IOC_DIR(cmd) & _IOC_READ)
err = !access_ok(VERIFY_WRITE, (void *)arg, _IOC_SIZE(cmd));
else if(_IOC_DIR(cmd) & _IOC_WRITE)
err = !access_ok(VERIFY_READ, (void *)arg, _IOC_SIZE(cmd));
if(err)
return -EFAULT;
switch (cmd)
{
case KPD_BLOCK:
kpd_block=1;
flip->f_flags &= ~0x800;
break;
case KPD_NONBLOCK:
kpd_block=0;
flip->f_flags |= ~0x800;
break;
default:
break;
}
return 0;
}
struct file_operations keypad745_fops =
{
owner: THIS_MODULE,
open: keypad745_open,
read: keypad745_read,
ioctl:keypad745_ioctl,
release: keypad745_close,
};
static int __init keypad_745_reg(void)
{
int result;
int old_cfg;
result = register_chrdev(MAJOR_NUM,DEV_NAME,&keypad745_fops);
if(result<0)
{
printk("initial the device error!\n");
return (result);
}
old_cfg=readl(GPIO_CFG);
old_cfg=old_cfg&GPIO_CFG_MASK;
old_cfg=old_cfg|GPIO_CFG_VALUE;
writel(old_cfg,GPIO_CFG);
writel(0,KPICONF);
writel(0,KPI3KCONF);
writel(0,KPISTATUS);
#ifdef __WB_EVB__
old_cfg=readl(GPIO_DIR);
old_cfg |= 0x3FF0000;
writel(old_cfg,GPIO_DIR);
#endif
writel(KPICONF_VALUE,KPICONF);
init_waitqueue_head(&read_wait_a);
printk("W90N745 Keypad initialized successful\n");
return (result);
}
static void keypad_745_exit(void)
{
unregister_chrdev(MAJOR_NUM,DEV_NAME);
return;
}
module_init(keypad_745_reg);
module_exit(keypad_745_exit);
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