add support for the Simplemachines Sim.One board

SVN-Revision: 18540

1 files changed, 1319 insertions, 0 deletions

diff --git a/target/linux/ep93xx/patches-2.6.30/006-ep93xx-touchscreen.patch b/target/linux/ep93xx/patches-2.6.30/006-ep93xx-touchscreen.patch
new file mode 100644
index 0000000000..7ea8edc13a
--- /dev/null
+++ b/target/linux/ep93xx/patches-2.6.30/006-ep93xx-touchscreen.patch
@@ -0,0 +1,1319 @@
+Index: linux-2.6.30.9/drivers/input/touchscreen/Kconfig
+===================================================================
+--- linux-2.6.30.9.orig/drivers/input/touchscreen/Kconfig	2009-11-24 21:00:18.000000000 +0100
++++ linux-2.6.30.9/drivers/input/touchscreen/Kconfig	2009-11-24 21:00:45.000000000 +0100
+@@ -161,6 +161,10 @@
+ 	  module will be called wacom_w8001.
+ 
+ 
++config TOUCHSCREEN_EP93XX
++	tristate "EP93xx Touchscreen"
++	depends on ARM && INPUT && ARCH_EP93XX
++
+ config TOUCHSCREEN_MTOUCH
+ 	tristate "MicroTouch serial touchscreens"
+ 	select SERIO
+Index: linux-2.6.30.9/drivers/input/touchscreen/Makefile
+===================================================================
+--- linux-2.6.30.9.orig/drivers/input/touchscreen/Makefile	2009-11-24 21:00:18.000000000 +0100
++++ linux-2.6.30.9/drivers/input/touchscreen/Makefile	2009-11-24 21:00:45.000000000 +0100
+@@ -14,6 +14,7 @@
+ obj-$(CONFIG_TOUCHSCREEN_CORGI)		+= corgi_ts.o
+ obj-$(CONFIG_TOUCHSCREEN_GUNZE)		+= gunze.o
+ obj-$(CONFIG_TOUCHSCREEN_ELO)		+= elo.o
++obj-$(CONFIG_TOUCHSCREEN_EP93XX)	+= ep93xx_ts.o
+ obj-$(CONFIG_TOUCHSCREEN_FUJITSU)	+= fujitsu_ts.o
+ obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
+ obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o
+Index: linux-2.6.30.9/drivers/input/touchscreen/ep93xx_ts.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.9/drivers/input/touchscreen/ep93xx_ts.c	2009-11-24 21:09:48.000000000 +0100
+@@ -0,0 +1,1117 @@
++/*
++ *  linux/drivers/input/touchscreen/ep93xx_ts.c
++ *
++ *  Copyright (C) 2003-2004 Cirrus Corp.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/delay.h>
++#include <linux/wait.h>
++#include <linux/fs.h>
++#include <linux/sched.h>
++#include <linux/poll.h>
++#include <linux/miscdevice.h>
++#include <linux/init.h>
++#include <linux/compiler.h>
++#include <linux/timer.h>
++#include <linux/interrupt.h>
++#include <linux/syscalls.h>
++#include <linux/input.h>
++#include <asm/irq.h>
++#include <mach/hardware.h>
++#include <asm/io.h>
++
++#define TOUCH_OFFSET            0x100000
++#define TOUCH_BASE              (EP93XX_APB_VIRT_BASE|TOUCH_OFFSET)
++#define TSSetup                 (TOUCH_BASE+0x00) /* R/W touchscreen controller setup control register.     */
++#define TSXYMaxMin              (TOUCH_BASE+0x04) /* R/W touchscreen controller max/min register.           */
++#define TSXYResult              (TOUCH_BASE+0x08) /* R   touchscreen controller result register.            */
++#define TSDischarge             (TOUCH_BASE+0x0C) /* LOCKED R/W touchscreen Switch Matrix control register. */
++#define TSXSample               (TOUCH_BASE+0x10) /* LOCKED R/W touchscreen Switch Matrix control register. */
++#define TSYSample               (TOUCH_BASE+0x14) /* LOCKED R/W touchscreen Switch Matrix control register. */
++#define TSDirect                (TOUCH_BASE+0x18) /* LOCKED R/W touchscreen Switch Matrix control register. */
++#define TSDetect                (TOUCH_BASE+0x1C) /* LOCKED R/W touchscreen Switch Matrix control register. */
++#define TSSWLock                (TOUCH_BASE+0x20) /*  NA    R/W touchscreen software lock register.         */
++#define TSSetup2                (TOUCH_BASE+0x24) /* R/W touchscreen setup control register #2.             */
++
++//
++// To customize for a new touchscreen, there are various macros that
++// have to be set.  If you allow UART_HACK_DEBUG to be defined, you
++// will get real time ts data scrolling up your serial terminal
++// screen that will help you empirically determine good values for these.
++//
++
++//
++// These are used as trigger levels to know when we have pen up/down
++//
++// The rules:
++// 1.  TS_HEAVY_INV_PRESSURE < TS_LIGHT_INV_PRESSURE because these
++//    are Inverse pressure.
++// 2.  Any touch lighter than TS_LIGHT_INV_PRESSURE is a pen up.
++// 3.  Any touch heavier than TS_HEAVY_INV_PRESSURE is a pen down.
++//
++#define   TS_HEAVY_INV_PRESSURE 0xFE0 //C00
++#define   TS_LIGHT_INV_PRESSURE 0xFFF //e00
++
++//
++// If the x, y, or inverse pressure changes more than these values
++// between two succeeding points, the point is not reported.
++//
++#define   TS_MAX_VALID_XY_CHANGE 0x300
++#define   TS_MAX_VALID_PRESSURE_CHANGE  0x100
++
++//
++// This is the minimum Z1 Value that is valid.
++//
++#define     MIN_Z1_VALUE                    0x50
++
++//
++// Settling delay for taking each ADC measurement.  Increase this
++// if ts is jittery.
++//
++#define EP93XX_TS_ADC_DELAY_USEC 2000
++
++//
++// Delay between TS points.
++//
++#define EP93XX_TS_PER_POINT_DELAY_USEC 10000
++
++//-----------------------------------------------------------------------------
++// Debug messaging thru the UARTs
++//-----------------------------------------------------------------------------
++/*
++ *  Hello there!  Are you trying to get this driver to work with a new
++ *  touschscreen?  Turn this on and you will get useful info coming
++ *  out of your serial port.
++ */
++/* #define PRINT_CALIBRATION_FACTORS */
++#ifdef PRINT_CALIBRATION_FACTORS
++#define UART_HACK_DEBUG 1
++int iMaxX=0, iMaxY=0, iMinX = 0xfff, iMinY = 0xfff;
++#endif
++
++/*
++ * For debugging, let's spew messages out serial port 1 or 3 at 57,600 baud.
++ */
++/* #define UART_HACK_DEBUG 1 */
++#if 0
++#ifdef UART_HACK_DEBUG
++static char szBuf[256];
++void UARTWriteString(char * msg);
++#define DPRINTK( x... )   \
++    sprintf( szBuf, ##x ); \
++    UARTWriteString( szBuf );
++#else
++static char szBuf[256];
++#define DPRINTK( x... )  \
++    sprintf( szBuf, ##x ); \
++    printk( szBuf );
++#endif
++#endif // 0
++#define DPRINTK( x... )
++
++//-----------------------------------------------------------------------------
++// A few more macros...
++//-----------------------------------------------------------------------------
++#define TSSETUP_DEFAULT  ( TSSETUP_NSMP_32 | TSSETUP_DEV_64 |  \
++                           ((128<<TSSETUP_SDLY_SHIFT) & TSSETUP_SDLY_MASK) | \
++                           ((128<<TSSETUP_DLY_SHIFT)  & TSSETUP_DLY_MASK) )
++
++#define TSSETUP2_DEFAULT (TSSETUP2_NSIGND)
++
++//
++// For now, we use one of the minor numbers from the local/experimental
++// range.
++//
++#define EP93XX_TS_MINOR 240
++
++//-----------------------------------------------------------------------------
++// Static Declarations
++//-----------------------------------------------------------------------------
++static unsigned int   guiLastX, guiLastY;
++static unsigned int   guiLastInvPressure;
++
++struct TouchScreenSample
++{
++    int     currentX;
++    int     currentY;
++    int     currentButton;
++    int     currentPressure;
++    struct timeval currentTime;
++};
++
++//
++// This must match the structure in tslib.
++//
++struct ts_sample {
++    int     x;
++    int     y;
++    unsigned int    pressure;
++    struct timeval  tv;
++};
++
++
++static struct TouchScreenSample gSample;
++
++// static int currentX, currentY, currentButton;
++// static int gPressure;
++// static struct timeval  gtime;
++
++static int bFreshTouchData;
++static int bCurrentPenDown;
++
++
++
++static DECLARE_WAIT_QUEUE_HEAD(queue);
++static DECLARE_MUTEX(open_sem);
++static spinlock_t event_buffer_lock = SPIN_LOCK_UNLOCKED;
++static struct fasync_struct *ep93xx_fasync;
++
++//-----------------------------------------------------------------------------
++// Typedef Declarations
++//-----------------------------------------------------------------------------
++typedef enum {
++    TS_MODE_UN_INITIALIZED,
++    TS_MODE_HARDWARE_SCAN,
++    TS_MODE_SOFT_SCAN
++} ts_mode_t;
++
++static ts_mode_t      gScanningMode;
++
++typedef enum{
++    TS_STATE_STOPPED = 0,
++    TS_STATE_Z1,
++    TS_STATE_Z2,
++    TS_STATE_Y,
++    TS_STATE_X,
++    TS_STATE_DONE
++} ts_states_t;
++
++typedef struct
++{
++    unsigned int   uiX;
++    unsigned int   uiY;
++    unsigned int   uiZ1;
++    unsigned int   uiZ2;
++    ts_states_t    state;
++} ts_struct_t;
++
++static ts_struct_t sTouch;
++
++/*
++ * From the spec, here's how to set up the touch screen's switch registers.
++ */
++typedef struct
++{
++    unsigned int uiDetect;
++    unsigned int uiDischarge;
++    unsigned int uiXSample;
++    unsigned int uiYSample;
++    unsigned int uiSwitchZ1;
++    unsigned int uiSwitchZ2;
++}SwitchStructType;
++
++//
++// Here's the switch settings for a 4-wire touchscreen.  See the spec
++// for how to handle a 4, 7, or 8-wire.
++//
++const static SwitchStructType sSwitchSettings =
++/*     s28en=0
++ *   TSDetect    TSDischarge  TSXSample  TSYSample    SwitchZ1   SwitchZ2
++ */
++    {0x00403604, 0x0007fe04, 0x00081604, 0x00104601, 0x00101601, 0x00101608};
++
++
++//-----------------------------------------------------------------------------
++// Function Declarations
++//-----------------------------------------------------------------------------
++static void ep93xx_ts_set_direct( unsigned int uiADCSwitch );
++static irqreturn_t ep93xx_ts_isr(int irq, void *dev_id);
++static irqreturn_t ep93xx_timer2_isr(int irq, void *dev_id);
++static void ee93xx_ts_evt_add( int button, int dX, int dY, int Pressure );
++static ssize_t ep93xx_ts_read(struct file *filp, char *buf,
++        size_t count, loff_t *l);
++static unsigned int ep93xx_ts_poll(struct file *filp, poll_table *wait);
++static int ep93xx_ts_open(struct inode *inode, struct file *filp);
++static int ep93xx_ts_fasync(int fd, struct file *filp, int on);
++static int ep93xx_ts_release(struct inode *inode, struct file *filp);
++static ssize_t ep93xx_ts_write(struct file *file, const char *buffer,
++                size_t count, loff_t *ppos);
++static void ep93xx_ts_setup(void);
++static void ep93xx_ts_shutdown(void);
++int __init ep93xx_ts_init(void);
++void __exit ep93xx_ts_exit(void);
++static unsigned int CalculateInvPressure( void );
++static unsigned int ADCGetData( unsigned int uiSamples, unsigned int uiMaxDiff);
++static void TS_Soft_Scan_Mode(void);
++static void TS_Hardware_Scan_Mode(void);
++static void ProcessPointData(void);
++static void Set_Timer2_uSec( unsigned int Delay_mSec );
++static void Stop_Timer2(void);
++
++
++
++//-----------------------------------------------------------------------------
++//  Debug stuff...
++//-----------------------------------------------------------------------------
++
++#ifdef UART_HACK_DEBUG
++
++// This "array" is a cheap-n-easy way of getting access to the UART registers.
++static unsigned int * const pDebugUART=(unsigned int *)IO_ADDRESS(UART1_BASE);
++//static unsigned int * const pDebugUART=(unsigned int *)IO_ADDRESS(UART3_BASE);
++static int bUartInitialized = 0;
++
++void SendChar(char value)
++{
++    // wait for Tx fifo full flag to clear.
++    while (pDebugUART[0x18>>2] & 0x20);
++
++    // send a char to the uart
++    pDebugUART[0] = value;
++}
++
++void UARTWriteString(char * msg)
++{
++    int index = 0;
++    unsigned int uiTemp;
++
++    //if((pDebugUART[0x14>>2] & 0x1) == 0)
++    if( bUartInitialized == 0 )
++    {
++        uiTemp = inl(EP93XX_SYSCON_DEVICE_CONFIG);
++        uiTemp |= EP93XX_SYSCON_DEVCFG_U1E;
++        //uiTemp |= EP93XX_SYSCON_DEVCFG_U3E;
++        SysconSetLocked(EP93XX_SYSCON_DEVICE_CONFIG, uiTemp);
++        pDebugUART[0x10>>2] = 0xf;
++        pDebugUART[0xc>>2] = 0;
++        pDebugUART[0x8>>2] = 0x70;
++        pDebugUART[0x14>>2] = 0x1;
++        bUartInitialized = 1;
++    }
++    while (msg[index] != 0)
++    {
++        if (msg[index] == '\n')
++        {
++            SendChar('\r');
++            SendChar('\n');
++        }
++        else
++        {
++            SendChar(msg[index]);
++        }
++        index++;
++    }
++}
++#endif // UART_HACK_DEBUG
++
++/*
++ *  ep93xx_ts_isr
++ */
++static irqreturn_t ep93xx_ts_isr(int irq, void *dev_id)
++{
++    DPRINTK("isr\n");
++
++    //
++    // Note that we don't clear the interrupt here.  The interrupt
++    // gets cleared in TS_Soft_Scan_Mode when the TS ENABLE
++    // bit is cleared.
++    //
++
++    //
++    // Set the ts to manual polling mode and schedule a callback.
++    // That way we can return from the isr in a reasonable amount of
++    // time and process the touch in the callback after a brief delay.
++    //
++    TS_Soft_Scan_Mode();
++
++    return(IRQ_HANDLED);
++}
++
++/*
++ * Save the current ts 'event' in an atomic fashion.
++ */
++static void ee93xx_ts_evt_add( int buttons, int iX, int iY, int iPressure )
++{
++#ifdef PRINT_CALIBRATION_FACTORS
++    if( iX > iMaxX ) iMaxX = iX;
++    if( iX < iMinX ) iMinX = iX;
++    if( iY > iMaxY ) iMaxY = iY;
++    if( iY < iMinY ) iMinY = iY;
++#endif
++
++
++    // printk("ee93xx_ts_evt_add\n");
++    //DPRINTK("cb\n");
++    /*
++     * Note the event, but use spinlocks to keep it from getting
++     * halfway read if we get interrupted.
++     */
++
++    spin_lock(&event_buffer_lock);
++    gSample.currentX        = iX;
++    gSample.currentY        = iY;
++    gSample.currentButton   = buttons;
++    gSample.currentPressure = iPressure;
++    bFreshTouchData         = 1;
++    do_gettimeofday(&gSample.currentTime);
++
++
++    spin_unlock(&event_buffer_lock);
++
++    kill_fasync(&ep93xx_fasync, SIGIO, POLL_IN);
++    wake_up_interruptible(&queue);
++
++}
++
++
++static ssize_t ep93xx_ts_read(struct file *filp, char *buf, size_t count, loff_t *l)
++{
++
++    unsigned short data[3];
++    struct  ts_sample   ts_data;
++    int     iReturn = -EFAULT;
++    // printk("ep93xx_ts_read\n");
++
++#ifdef PRINT_CALIBRATION_FACTORS
++    static int lala=0;
++    if( bFreshTouchData && (lala++ > 9) )
++    {
++        DPRINTK("%4d, %4d - range [%4d to %4d],[%4d to %4d]\n",
++            f, currentY, iMinX, iMaxX, iMinY, iMaxY );
++        lala = 0;
++    }
++#endif
++    if( !bFreshTouchData)
++    {
++        iReturn = 0;
++    }
++    else if( (count == sizeof(data)) )
++    {
++        spin_lock_irq(&event_buffer_lock);
++        bFreshTouchData = 0;
++        data[0] = gSample.currentX;
++        data[1] = gSample.currentY;
++        data[2] = gSample.currentButton;
++
++        spin_unlock_irq(&event_buffer_lock);
++
++        if (copy_to_user(buf, data, sizeof data))
++            return -EFAULT;
++
++        count -= sizeof(data);
++
++        /* return the # of bytes that got read */
++        iReturn = sizeof(data) ;
++    }
++    else if (count == sizeof(struct ts_sample) )
++    {
++        spin_lock_irq(&event_buffer_lock);
++        bFreshTouchData = 0;
++        ts_data.x           = gSample.currentX;
++        ts_data.y           = gSample.currentY;
++        ts_data.pressure    = gSample.currentPressure;
++        ts_data.tv          = gSample.currentTime;
++        spin_unlock_irq(&event_buffer_lock);
++
++        if (copy_to_user(buf, &ts_data, sizeof(struct ts_sample)))
++        {
++            iReturn = -EFAULT;
++        }
++        else
++        {
++            count -= sizeof(ts_data);
++            iReturn = sizeof(ts_data);
++        }
++
++    }
++
++    return iReturn;
++}
++
++static unsigned int ep93xx_ts_poll(struct file *filp, poll_table *wait)
++{
++    // printk("ep93xx_ts_poll\n");
++    poll_wait(filp, &queue, wait);
++
++    if( bFreshTouchData )
++    {
++        return POLLIN | POLLRDNORM;
++    }
++
++    return 0;
++}
++
++static int ep93xx_ts_open(struct inode *inode, struct file *filp)
++{
++     printk("ep93xx_ts_open");
++
++    if( down_trylock(&open_sem) )
++    {
++        return -EBUSY;
++    }
++
++    ep93xx_ts_setup();
++
++    return 0;
++}
++
++/*
++ * Asynchronous I/O support.
++ */
++static int ep93xx_ts_fasync(int fd, struct file *filp, int on)
++{
++    int retval;
++
++    retval = fasync_helper(fd, filp, on, &ep93xx_fasync);
++    if (retval < 0)
++    {
++        return retval;
++    }
++
++    return 0;
++}
++
++static int ep93xx_ts_release(struct inode *inode, struct file *filp)
++{
++    Stop_Timer2();
++
++    /*
++     * Call our async I/O support to request that this file
++     * cease to be used for async I/O.
++     */
++    ep93xx_ts_fasync(-1, filp, 0);
++
++    ep93xx_ts_shutdown();
++
++    up(&open_sem);
++
++    return 0;
++}
++
++static ssize_t ep93xx_ts_write(struct file *file, const char *buffer, size_t count,
++               loff_t *ppos)
++{
++    return -EINVAL;
++}
++
++
++static int ep93xx_ts_ioctl(struct inode *inode, struct file *file, uint command, ulong u)
++{
++    static const int         version = EV_VERSION;
++    static const u_int32_t   bit =(1 << EV_ABS);
++    static const u_int32_t   absbit = (1 << ABS_X) | (1 << ABS_Y) | (1 << ABS_PRESSURE);
++    int         iReturn ;
++    int         i = 0;
++
++    switch(command)
++    {
++        case EVIOCGVERSION:
++            DPRINTK("ep93xx_ts_ioctl command = EVIOCGVERSION\r\n");
++            i = copy_to_user((void __user *)u, (void *)version, sizeof(version));
++            iReturn = i ? -EFAULT : 0;
++            break;
++
++        case EVIOCGBIT(0,sizeof(u_int32_t) * 8) :
++            DPRINTK("ep93xx_ts_ioctl command = EVIOCGBIT(0,sizeof(uint32) * 8)\r\n");
++            i = copy_to_user((void __user *)u, (void *)bit, sizeof(bit));
++            iReturn = i ? -EFAULT : 0;
++            break;
++
++        case EVIOCGBIT(EV_ABS, sizeof(absbit) * 8):
++            DPRINTK("ep93xx_ts_ioctl command = EVIOCGBIT(0,sizeof(uint32) * 8)\r\n");
++            copy_to_user((void __user *)u, (void *)absbit, sizeof(absbit));
++            iReturn = i ? -EFAULT : 0;
++            break;
++        default:
++            DPRINTK(" ep93xx_ts_ioctl unknown command = %d\n",u);
++            iReturn = -1;
++            break;
++    }
++
++    return iReturn;
++}
++
++static struct file_operations ep93xx_ts_fops = {
++    owner:      THIS_MODULE,
++    read:       ep93xx_ts_read,
++    write:      ep93xx_ts_write,
++    poll:       ep93xx_ts_poll,
++    open:       ep93xx_ts_open,
++    ioctl:      ep93xx_ts_ioctl,
++    release:    ep93xx_ts_release,
++    fasync:     ep93xx_ts_fasync,
++};
++
++static struct miscdevice ep93xx_ts_miscdev =
++{
++        EP93XX_TS_MINOR,
++        "ep93xx_ts",
++        &ep93xx_ts_fops
++};
++
++void ep93xx_ts_setup(void)
++{
++    unsigned int uiKTDIV, uiTSXYMaxMin;
++    // printk("ep93xx_hw_setup\n");
++
++    /*
++     * Set the TSEN bit in KTDIV so that we are enabling the clock
++     * for the touchscreen.
++     */
++    uiKTDIV = inl(SYSCON_KTDIV);
++    uiKTDIV |= SYSCON_KTDIV_TSEN;
++    SysconSetLocked( SYSCON_KTDIV, uiKTDIV );
++
++    //
++    // Program the TSSetup and TSSetup2 registers.
++    //
++    outl( TSSETUP_DEFAULT, TSSetup );
++    outl( TSSETUP2_DEFAULT, TSSetup2 );
++
++    //
++    // Set the the touch settings.
++    //
++    outl( 0xaa, TSSWLock );
++    outl( sSwitchSettings.uiDischarge, TSDirect );
++
++    outl( 0xaa, TSSWLock );
++    outl( sSwitchSettings.uiDischarge, TSDischarge );
++
++    outl( 0xaa, TSSWLock );
++    outl( sSwitchSettings.uiSwitchZ1, TSXSample );
++
++    outl( 0xaa, TSSWLock );
++    outl( sSwitchSettings.uiSwitchZ2, TSYSample );
++
++    outl( 0xaa, TSSWLock );
++    outl( sSwitchSettings.uiDetect, TSDetect );
++
++    //
++    // X,YMin set to 0x40 = have to drag that many pixels for a new irq.
++    // X,YMax set to 0x40 = 1024 pixels is the maximum movement within the
++    // time scan limit.
++    //
++    uiTSXYMaxMin =  (50   << TSMAXMIN_XMIN_SHIFT) & TSMAXMIN_XMIN_MASK;
++    uiTSXYMaxMin |= (50   << TSMAXMIN_YMIN_SHIFT) & TSMAXMIN_YMIN_MASK;
++    uiTSXYMaxMin |= (0xff << TSMAXMIN_XMAX_SHIFT) & TSMAXMIN_XMAX_MASK;
++    uiTSXYMaxMin |= (0xff << TSMAXMIN_YMAX_SHIFT) & TSMAXMIN_YMAX_MASK;
++    outl( uiTSXYMaxMin, TSXYMaxMin );
++
++    bCurrentPenDown = 0;
++    bFreshTouchData = 0;
++    guiLastX = 0;
++    guiLastY = 0;
++    guiLastInvPressure = 0xffffff;
++
++    //
++    // Enable the touch screen scanning engine.
++    //
++    TS_Hardware_Scan_Mode();
++}
++
++/*
++ * ep93xx_ts_shutdown
++ *
++ */
++static void
++ep93xx_ts_shutdown(void)
++{
++    unsigned int uiKTDIV;
++
++    DPRINTK("ep93xx_ts_shutdown\n");
++
++    sTouch.state = TS_STATE_STOPPED;
++    Stop_Timer2();
++
++    /*
++     * Disable the scanning engine.
++     */
++    outl( 0, TSSetup );
++    outl( 0, TSSetup2 );
++
++    /*
++     * Clear the TSEN bit in KTDIV so that we are disabling the clock
++     * for the touchscreen.
++     */
++    uiKTDIV = inl(SYSCON_KTDIV);
++    uiKTDIV &= ~SYSCON_KTDIV_TSEN;
++    SysconSetLocked( SYSCON_KTDIV, uiKTDIV );
++
++} /* ep93xx_ts_shutdown */
++
++static irqreturn_t ep93xx_timer2_isr(int irq, void *dev_id)
++{
++    DPRINTK("%d", (int)sTouch.state );
++
++    switch( sTouch.state )
++    {
++        case TS_STATE_STOPPED:
++            TS_Hardware_Scan_Mode();
++            break;
++
++        //
++        // Get the Z1 value for pressure measurement and set up
++        // the switch register for getting the Z2 measurement.
++        //
++        case TS_STATE_Z1:
++            Set_Timer2_uSec( EP93XX_TS_ADC_DELAY_USEC );
++            sTouch.uiZ1 = ADCGetData( 2, 200 );
++            ep93xx_ts_set_direct( sSwitchSettings.uiSwitchZ2 );
++            sTouch.state = TS_STATE_Z2;
++            break;
++
++        //
++        // Get the Z2 value for pressure measurement and set up
++        // the switch register for getting the Y measurement.
++        //
++        case TS_STATE_Z2:
++            sTouch.uiZ2 = ADCGetData( 2, 200 );
++            ep93xx_ts_set_direct( sSwitchSettings.uiYSample );
++            sTouch.state = TS_STATE_Y;
++            break;
++
++        //
++        // Get the Y value and set up the switch register for
++        // getting the X measurement.
++        //
++        case TS_STATE_Y:
++            sTouch.uiY = ADCGetData( 4, 20 );
++            ep93xx_ts_set_direct( sSwitchSettings.uiXSample );
++            sTouch.state = TS_STATE_X;
++            break;
++
++        //
++        // Read the X value.  This is the last of the 4 adc values
++        // we need so we continue on to process the data.
++        //
++        case TS_STATE_X:
++            Stop_Timer2();
++
++            sTouch.uiX = ADCGetData( 4, 20 );
++
++            outl( 0xaa, TSSWLock );
++            outl( sSwitchSettings.uiDischarge, TSDirect );
++
++            sTouch.state = TS_STATE_DONE;
++
++            /*
++             * Process this set of ADC readings.
++             */
++            ProcessPointData();
++
++            break;
++
++
++        //
++        // Shouldn't get here.  But if we do, we can recover...
++        //
++        case TS_STATE_DONE:
++            TS_Hardware_Scan_Mode();
++            break;
++    }
++
++    //
++    // Clear the timer2 interrupt.
++    //
++    outl( 1, TIMER2CLEAR );
++    return(IRQ_HANDLED);
++}
++
++/*---------------------------------------------------------------------
++ * ProcessPointData
++ *
++ * This routine processes the ADC data into usable point data and then
++ * puts the driver into hw or sw scanning mode before returning.
++ *
++ * We calculate inverse pressure (lower number = more pressure) then
++ * do a hystheresis with the two pressure values 'light' and 'heavy'.
++ *
++ * If we are above the light, we have pen up.
++ * If we are below the heavy we have pen down.
++ * As long as the pressure stays below the light, pen stays down.
++ * When we get above the light again, pen goes back up.
++ *
++ */
++static void ProcessPointData(void)
++{
++    int  bValidPoint = 0;
++    unsigned int   uiXDiff, uiYDiff, uiInvPressureDiff;
++    unsigned int   uiInvPressure;
++
++    //
++    // Calculate the current pressure.
++    //
++    uiInvPressure = CalculateInvPressure();
++
++    DPRINTK(" X=0x%x, Y=0x%x, Z1=0x%x, Z2=0x%x, InvPressure=0x%x",
++            sTouch.uiX, sTouch.uiY, sTouch.uiZ1, sTouch.uiZ2, uiInvPressure );
++
++    //
++    // If pen pressure is so light that it is greater than the 'max' setting
++    // then we consider this to be a pen up.
++    //
++    if( uiInvPressure >= TS_LIGHT_INV_PRESSURE )
++    {
++        DPRINTK(" -- up \n");
++        bCurrentPenDown = 0;
++                ee93xx_ts_evt_add( 0, guiLastX, guiLastY, 0 );
++        TS_Hardware_Scan_Mode();
++        return;
++    }
++
++    //
++    // Hystheresis:
++    // If the pen pressure is hard enough to be less than the 'min' OR
++    // the pen is already down and is still less than the 'max'...
++    //
++    if( (uiInvPressure < TS_HEAVY_INV_PRESSURE) ||
++        ( bCurrentPenDown && (uiInvPressure < TS_LIGHT_INV_PRESSURE) )  )
++    {
++        if( bCurrentPenDown )
++        {
++            //
++            // If pen was previously down, check the difference between
++            // the last sample and this one... if the difference between
++            // samples is too great, ignore the sample.
++            //
++            uiXDiff = abs(guiLastX - sTouch.uiX);
++            uiYDiff = abs(guiLastY - sTouch.uiY);
++            uiInvPressureDiff = abs(guiLastInvPressure - uiInvPressure);
++
++            if( (uiXDiff < TS_MAX_VALID_XY_CHANGE) && (uiYDiff < TS_MAX_VALID_XY_CHANGE) &&
++                (uiInvPressureDiff < TS_MAX_VALID_PRESSURE_CHANGE) )
++            {
++                DPRINTK(" -- valid(two) \n");
++                bValidPoint = 1;
++            }
++            else
++            {
++                DPRINTK(" -- INvalid(two) \n");
++            }
++        }
++        else
++        {
++            DPRINTK(" -- valid \n");
++            bValidPoint = 1;
++        }
++
++        /*
++         * If either the pen was put down or dragged make a note of it.
++         */
++        if( bValidPoint )
++        {
++            guiLastX = sTouch.uiX;
++            guiLastY = sTouch.uiY;
++            guiLastInvPressure = uiInvPressure;
++            bCurrentPenDown = 1;
++            ee93xx_ts_evt_add( 1, sTouch.uiX, sTouch.uiY, (0x7000000 /uiInvPressure) );
++        }
++
++        TS_Soft_Scan_Mode();
++        return;
++    }
++
++    DPRINTK(" -- fallout \n");
++    TS_Hardware_Scan_Mode();
++}
++
++static void ep93xx_ts_set_direct( unsigned int uiADCSwitch )
++{
++    unsigned int uiResult;
++
++    //
++    // Set the switch settings in the direct register.
++    //
++    outl( 0xaa, TSSWLock );
++    outl( uiADCSwitch, TSDirect );
++
++    //
++    // Read and throw away the first sample.
++    //
++    do {
++        uiResult = inl(TSXYResult);
++    } while( !(uiResult & TSXYRESULT_SDR) );
++
++}
++
++static unsigned int ADCGetData
++(
++    unsigned int uiSamples,
++    unsigned int uiMaxDiff
++)
++{
++    unsigned int   uiResult, uiValue, uiCount, uiLowest, uiHighest, uiSum, uiAve;
++
++    do
++    {
++        //
++        //Initialize our values.
++        //
++        uiLowest        = 0xfffffff;
++        uiHighest       = 0;
++        uiSum           = 0;
++
++        for( uiCount = 0 ; uiCount < uiSamples ; uiCount++ )
++        {
++            //
++            // Read the touch screen four more times and average.
++            //
++            do {
++                uiResult = inl(TSXYResult);
++            } while( !(uiResult & TSXYRESULT_SDR) );
++
++            uiValue = (uiResult & TSXYRESULT_AD_MASK) >> TSXYRESULT_AD_SHIFT;
++            uiValue = ((uiValue >> 4) + ((1 + TSXYRESULT_X_MASK)>>1))  & TSXYRESULT_X_MASK;
++
++            //
++            // Add up the values.
++            //
++            uiSum += uiValue;
++
++            //
++            // Get the lowest and highest values.
++            //
++            if( uiValue < uiLowest )
++            {
++                uiLowest = uiValue;
++            }
++            if( uiValue > uiHighest )
++            {
++                uiHighest = uiValue;
++            }
++        }
++
++    } while( (uiHighest - uiLowest) > uiMaxDiff );
++
++    //
++    // Calculate the Average value.
++    //
++    uiAve = uiSum / uiSamples;
++
++    return uiAve;
++}
++
++//****************************************************************************
++// CalculateInvPressure
++//****************************************************************************
++// Is the Touch Valid.  Touch is not valid if the X or Y value is not
++// in range and the pressure is not  enough.
++//
++// Touch resistance can be measured by the following formula:
++//
++//          Rx * X *     Z2
++// Rtouch = --------- * (-- - 1)
++//           4096        Z1
++//
++// This is simplified in the ration of Rtouch to Rx.  The lower the value, the
++// higher the pressure.
++//
++//                     Z2
++// InvPressure =  X * (-- - 1)
++//                     Z1
++//
++static unsigned int CalculateInvPressure(void)
++{
++    unsigned int   uiInvPressure;
++
++    //
++    // Check to see if the point is valid.
++    //
++    if( sTouch.uiZ1 < MIN_Z1_VALUE )
++    {
++        uiInvPressure = 0x10000;
++    }
++
++    //
++    // Can omit the pressure calculation if you need to get rid of the division.
++    //
++    else
++    {
++        uiInvPressure = ((sTouch.uiX * sTouch.uiZ2) / sTouch.uiZ1) - sTouch.uiX;
++    }
++
++    return uiInvPressure;
++}
++
++
++
++//****************************************************************************
++// TS_Hardware_Scan_Mode
++//****************************************************************************
++// Enables the ep93xx ts scanning engine so that when the pen goes down
++// we will get an interrupt.
++//
++//
++static void TS_Hardware_Scan_Mode(void)
++{
++    unsigned int   uiDevCfg;
++
++    DPRINTK("S\n");
++
++    //
++    // Disable the soft scanning engine.
++    //
++    sTouch.state = TS_STATE_STOPPED;
++    Stop_Timer2();
++
++    //
++    // Clear the TIN (Touchscreen INactive) bit so we can go to
++    // automatic scanning mode.
++    //
++    uiDevCfg = inl( EP93XX_SYSCON_DEVICE_CONFIG );
++    SysconSetLocked( EP93XX_SYSCON_DEVICE_CONFIG, (uiDevCfg & ~EP93XX_SYSCON_DEVCFG_TIN) );
++
++    //
++    // Enable the touch screen scanning state machine by setting
++    // the ENABLE bit.
++    //
++    outl( (TSSETUP_DEFAULT | TSSETUP_ENABLE), TSSetup );
++
++    //
++    // Set the flag to show that we are in interrupt mode.
++    //
++    gScanningMode = TS_MODE_HARDWARE_SCAN;
++
++    //
++    // Initialize TSSetup2 register.
++    //
++    outl( TSSETUP2_DEFAULT, TSSetup2 );
++
++}
++
++//****************************************************************************
++// TS_Soft_Scan_Mode
++//****************************************************************************
++// Sets the touch screen to manual polling mode.
++//
++//
++static void TS_Soft_Scan_Mode(void)
++{
++    unsigned int   uiDevCfg;
++
++    DPRINTK("M\n");
++
++    if( gScanningMode != TS_MODE_SOFT_SCAN )
++    {
++        //
++        // Disable the touch screen scanning state machine by clearing
++        // the ENABLE bit.
++        //
++        outl( TSSETUP_DEFAULT, TSSetup );
++
++        //
++        // Set the TIN bit so we can do manual touchscreen polling.
++        //
++        uiDevCfg = inl(EP93XX_SYSCON_DEVICE_CONFIG );
++        SysconSetLocked( EP93XX_SYSCON_DEVICE_CONFIG, (uiDevCfg | EP93XX_SYSCON_DEVCFG_TIN) );
++    }
++
++    //
++    // Set the switch register up for the first ADC reading
++    //
++    ep93xx_ts_set_direct( sSwitchSettings.uiSwitchZ1 );
++
++    //
++    // Initialize our software state machine to know which ADC
++    // reading to take
++    //
++    sTouch.state = TS_STATE_Z1;
++
++    //
++    // Set the timer so after a mSec or two settling delay it will
++    // take the first ADC reading.
++    //
++    Set_Timer2_uSec( EP93XX_TS_PER_POINT_DELAY_USEC );
++
++    //
++    // Note that we are in sw scanning mode not hw scanning mode.
++    //
++    gScanningMode = TS_MODE_SOFT_SCAN;
++
++}
++
++static void Set_Timer2_uSec( unsigned int uiDelay_uSec )
++{
++    unsigned int uiClockTicks;
++
++    /*
++     * Stop timer 2
++     */
++    outl( 0, TIMER2CONTROL );
++
++    uiClockTicks = ((uiDelay_uSec * 508) + 999) / 1000;
++    outl( uiClockTicks, TIMER2LOAD );
++    outl( uiClockTicks, TIMER2VALUE );
++
++    /*
++     * Set up Timer 2 for 508 kHz clock and periodic mode.
++     */
++    outl( 0xC8, TIMER2CONTROL );
++
++}
++
++static void Stop_Timer2(void)
++{
++    outl( 0, TIMER2CONTROL );
++}
++
++/*
++ * Initialization and exit routines
++ */
++int __init ep93xx_ts_init(void)
++{
++    int retval;
++
++    //printk("ep93xx_ts_init\n");
++
++    // printk("request Touchscreen interrupt.\n");
++    retval = request_irq( IRQ_EP93XX_TOUCH, ep93xx_ts_isr, IRQF_DISABLED, "ep93xx_ts", 0);
++    if( retval )
++    {
++        printk(KERN_WARNING "ep93xx_ts: failed to get touchscreen IRQ\n");
++        return retval;
++    }
++
++    // printk("Request Timer interrupt.\n");
++    retval = request_irq( IRQ_EP93XX_TIMER2, ep93xx_timer2_isr,
++                        IRQF_DISABLED, "ep93xx_timer2", 0);
++    if( retval )
++    {
++        printk(KERN_WARNING "ep93xx_ts: failed to get timer2 IRQ\n");
++        return retval;
++    }
++
++    // printk("Register Touchscreen Driver\n");
++    misc_register(&ep93xx_ts_miscdev);
++
++    sTouch.state = TS_STATE_STOPPED;
++    gScanningMode = TS_MODE_UN_INITIALIZED;
++
++    printk(KERN_NOTICE "ep93xx touchscreen driver configured for 4-wire operation\n");
++
++    return 0;
++}
++void __exit
++ep93xx_ts_exit(void)
++{
++    DPRINTK("ep93xx_ts_exit\n");
++
++    Stop_Timer2();
++
++    free_irq(IRQ_EP93XX_TOUCH, 0);
++    free_irq(IRQ_EP93XX_TIMER2, 0);
++
++    misc_deregister(&ep93xx_ts_miscdev);
++}
++
++module_init(ep93xx_ts_init);
++module_exit(ep93xx_ts_exit);
++
++MODULE_DESCRIPTION("Cirrus EP93xx touchscreen driver");
++MODULE_SUPPORTED_DEVICE("touchscreen/ep93xx");
+Index: linux-2.6.30.9/drivers/input/touchscreen/ep93xx_ts.h
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.9/drivers/input/touchscreen/ep93xx_ts.h	2009-11-24 21:00:45.000000000 +0100
+@@ -0,0 +1,53 @@
++/*
++ * ep93xx_ts.h
++ *
++ * The contents of this file are subject to the Mozilla Public License
++ * Version 1.1 (the "License"); you may not use this file except in
++ * compliance with the License. You may obtain a copy of the License
++ * at http://www.mozilla.org/MPL/
++ *
++ * Software distributed under the License is distributed on an "AS IS"
++ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
++ * the License for the specific language governing rights and
++ * limitations under the License.
++ *
++ * The initial developer of the original code is David A. Hinds
++ * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
++ * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
++ *
++ * Alternatively, the contents of this file may be used under the
++ * terms of the GNU General Public License version 2 (the "GPL"), in
++ * which case the provisions of the GPL are applicable instead of the
++ * above.  If you wish to allow the use of your version of this file
++ * only under the terms of the GPL and not to allow others to use
++ * your version of this file under the MPL, indicate your decision by
++ * deleting the provisions above and replace them with the notice and
++ * other provisions required by the GPL.  If you do not delete the
++ * provisions above, a recipient may use your version of this file
++ * under either the MPL or the GPL.
++ */
++
++#ifndef _LINUX_EP93XX_TS_H
++#define _LINUX_EP93XX_TS_H
++
++/*touchscreen register defines*/
++#define SYSCON_KTDIV 	EP93XX_SYSCON_KEY_TOUCH_CLOCK_DIV
++#define SYSCON_SWLOCK	EP93XX_SYSCON_SWLOCK
++#define TSSetup 	EP93XX_TOUCHSCREEN_TSSetup
++#define TSXYMaxMin	EP93XX_TOUCHSCREEN_TSXYMaxMin
++#define TSXYResult	EP93XX_TOUCHSCREEN_TSDischarge
++#define TSDischarge	EP93XX_TOUCHSCREEN_TSDischarge
++#define TSXSample	EP93XX_TOUCHSCREEN_TSXSample
++#define TSYSample	EP93XX_TOUCHSCREEN_TSYSample
++#define TSDirect	EP93XX_TOUCHSCREEN_TSDirect
++#define TSDetect	EP93XX_TOUCHSCREEN_TSDetect
++#define TSSWLock	EP93XX_TOUCHSCREEN_TSSWLock
++#define TSSetup2	EP93XX_TOUCHSCREEN_TSSetup2
++
++
++//#define SYSCON_DEVCFG	EP93XX_SYSCON_DEVICE_CONFIG
++#define TIMER2CONTROL	EP93XX_TIMER2_CONTROL
++#define TIMER2LOAD	EP93XX_TIMER2_LOAD
++#define TIMER2VALUE	EP93XX_TIMER2_VALUE
++#define TIMER2CLEAR  	EP93XX_TIMER2_CLEAR
++#endif
+Index: linux-2.6.30.9/arch/arm/mach-ep93xx/include/mach/hardware.h
+===================================================================
+--- linux-2.6.30.9.orig/arch/arm/mach-ep93xx/include/mach/hardware.h	2009-11-24 21:00:18.000000000 +0100
++++ linux-2.6.30.9/arch/arm/mach-ep93xx/include/mach/hardware.h	2009-11-24 21:09:21.000000000 +0100
+@@ -7,6 +7,7 @@
+ #include "ep93xx-regs.h"
+ 
+ #define pcibios_assign_all_busses()	0
++#include "regs_touch.h"
+ 
+ #include "platform.h"
+ 
+Index: linux-2.6.30.9/arch/arm/mach-ep93xx/include/mach/regs_touch.h
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.9/arch/arm/mach-ep93xx/include/mach/regs_touch.h	2009-11-24 21:00:45.000000000 +0100
+@@ -0,0 +1,95 @@
++/*=============================================================================
++ *
++ *  FILE:       regs_touch.h
++ *
++ *  DESCRIPTION:    Analog Touchscreen Register Definition
++ *
++ *  Copyright Cirrus Logic, 2001-2003
++ *
++ * 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
++ *=============================================================================
++ */
++#ifndef _REGS_TOUCH_H_
++#define _REGS_TOUCH_H_
++
++/*
++ *-----------------------------------------------------------------------------
++ * Individual bit #defines
++ *-----------------------------------------------------------------------------
++ */
++#define TSSETUP_SDLY_MASK           0x000003FF
++#define TSSETUP_SDLY_SHIFT          0
++#define TSSETUP_NSMP_4              0x00000000
++#define TSSETUP_NSMP_8              0x00000400
++#define TSSETUP_NSMP_16             0x00000800
++#define TSSETUP_NSMP_32             0x00000C00
++#define TSSETUP_NSMP_MASK           0x00000C00
++#define TSSETUP_DEV_4               0x00000000
++#define TSSETUP_DEV_8               0x00001000
++#define TSSETUP_DEV_12              0x00002000
++#define TSSETUP_DEV_16              0x00003000
++#define TSSETUP_DEV_24              0x00004000
++#define TSSETUP_DEV_32              0x00005000
++#define TSSETUP_DEV_64              0x00006000
++#define TSSETUP_DEV_128             0x00007000
++#define TSSETUP_ENABLE              0x00008000
++#define TSSETUP_DLY_MASK            0x03FF0000
++#define TSSETUP_DLY_SHIFT           16
++#define TSSETUP_TDTCT               0x80000000
++
++#define TSMAXMIN_XMIN_MASK          0x000000FF
++#define TSMAXMIN_XMIN_SHIFT         0
++#define TSMAXMIN_YMIN_MASK          0x0000FF00
++#define TSMAXMIN_YMIN_SHIFT         8
++#define TSMAXMIN_XMAX_MASK          0x00FF0000
++#define TSMAXMIN_XMAX_SHIFT         16
++#define TSMAXMIN_YMAX_MASK          0xFF000000
++#define TSMAXMIN_YMAX_SHIFT         24
++
++#define TSXYRESULT_X_MASK           0x00000FFF
++#define TSXYRESULT_X_SHIFT          0
++#define TSXYRESULT_AD_MASK          0x0000FFFF
++#define TSXYRESULT_AD_SHIFT         0
++#define TSXYRESULT_Y_MASK           0x0FFF0000
++#define TSXYRESULT_Y_SHIFT          16
++#define TSXYRESULT_SDR              0x80000000
++
++#define TSX_SAMPLE_MASK             0x00003FFF
++#define TSX_SAMPLE_SHIFT            0x00
++#define TSY_SAMPLE_MASK             0x3FFF0000
++#define TSY_SAMPLE_SHIFT            0x10
++
++#define TSSETUP2_TINT               0x00000001
++#define TSSETUP2_NICOR              0x00000002
++#define TSSETUP2_PINT               0x00000004
++#define TSSETUP2_PENSTS             0x00000008
++#define TSSETUP2_PINTEN             0x00000010
++#define TSSETUP2_DEVINT             0x00000020
++#define TSSETUP2_DINTEN             0x00000040
++#define TSSETUP2_DTMEN              0x00000080
++#define TSSETUP2_DISDEV             0x00000100
++#define TSSETUP2_NSIGND             0x00000200
++#define TSSETUP2_S28EN              0x00000400
++#define TSSETUP2_RINTEN             0x00000800
++
++#define TSXYRESULT_SDR     	    0x80000000
++
++/*
++ *-----------------------------------------------------------------------------
++ *-----------------------------------------------------------------------------
++ */
++
++
++#endif /* _REGS_TOUCH_H_ */