ep93xx: remove 3.3 kernel support

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36064 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 1061 deletions

diff --git a/target/linux/ep93xx/patches-3.3/003-ep93xx_touchscreen.patch b/target/linux/ep93xx/patches-3.3/003-ep93xx_touchscreen.patch
deleted file mode 100644
index f37836d998..0000000000
--- a/target/linux/ep93xx/patches-3.3/003-ep93xx_touchscreen.patch
+++ /dev/null
@@ -1,1061 +0,0 @@
----
- arch/arm/mach-ep93xx/include/mach/hardware.h   |    1 
- arch/arm/mach-ep93xx/include/mach/regs_touch.h |   95 ++
- drivers/input/touchscreen/Kconfig              |    5 
- drivers/input/touchscreen/Makefile             |    1 
- drivers/input/touchscreen/ep93xx_ts.c          | 1117 +++++++++++++++++++++++++
- drivers/input/touchscreen/ep93xx_ts.h          |   53 +
- 6 files changed, 1272 insertions(+)
-
---- a/drivers/input/touchscreen/Kconfig
-+++ b/drivers/input/touchscreen/Kconfig
-@@ -200,6 +200,15 @@ config TOUCHSCREEN_EGALAX
- 	  To compile this driver as a module, choose M here: the
- 	  module will be called egalax_ts.
- 
-+config TOUCHSCREEN_EP93XX
-+	tristate "EP93xx Touchscreen"
-+	depends on ARM && INPUT && ARCH_EP93XX
-+	help
-+	  Say Y here to enable support for EP93xx touch screen.
-+
-+	  To compile this driver as a module, choose M here:
-+	  the module will be called ep93xx_ts.
-+
- config TOUCHSCREEN_FUJITSU
- 	tristate "Fujitsu serial touchscreen"
- 	select SERIO
---- a/drivers/input/touchscreen/Makefile
-+++ b/drivers/input/touchscreen/Makefile
-@@ -25,6 +25,7 @@ obj-$(CONFIG_TOUCHSCREEN_GUNZE)		+= gunz
- obj-$(CONFIG_TOUCHSCREEN_EETI)		+= eeti_ts.o
- obj-$(CONFIG_TOUCHSCREEN_ELO)		+= elo.o
- obj-$(CONFIG_TOUCHSCREEN_EGALAX)	+= egalax_ts.o
-+obj-$(CONFIG_TOUCHSCREEN_EP93XX)	+= ep93xx_ts.o
- obj-$(CONFIG_TOUCHSCREEN_FUJITSU)	+= fujitsu_ts.o
- obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
- obj-$(CONFIG_TOUCHSCREEN_INTEL_MID)	+= intel-mid-touch.o
---- /dev/null
-+++ b/drivers/input/touchscreen/ep93xx_ts.c
-@@ -0,0 +1,1021 @@
-+/*
-+ * 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 <linux/semaphore.h>
-+#include <asm/irq.h>
-+#include <mach/hardware.h>
-+#include <asm/io.h>
-+
-+/* This stuff should be in ep93xx-regs.h */
-+#define EP93XX_TOUCHSCREEN_REG(x)	(EP93XX_TOUCHSCREEN_BASE + (x))
-+/* R/W touchscreen controller setup control register. */
-+#define EP93XX_TOUCHSCREEN_SETUP	EP93XX_TOUCHSCREEN_REG(0x00)
-+/* R/W touchscreen controller max/min register. */
-+#define EP93XX_TOUCHSCREEN_XYMAXMIN	EP93XX_TOUCHSCREEN_REG(0x04)
-+/* R   touchscreen controller result register. */
-+#define EP93XX_TOUCHSCREEN_XYRESULT	EP93XX_TOUCHSCREEN_REG(0x08)
-+/* LOCKED R/W touchscreen Switch Matrix control register. */
-+#define EP93XX_TOUCHSCREEN_DISCHARGE	EP93XX_TOUCHSCREEN_REG(0x0C)
-+#define EP93XX_TOUCHSCREEN_XSAMPLE	EP93XX_TOUCHSCREEN_REG(0x10)
-+#define EP93XX_TOUCHSCREEN_YSAMPLE	EP93XX_TOUCHSCREEN_REG(0x14)
-+#define EP93XX_TOUCHSCREEN_DIRECT	EP93XX_TOUCHSCREEN_REG(0x18)
-+#define EP93XX_TOUCHSCREEN_DETECT	EP93XX_TOUCHSCREEN_REG(0x1C)
-+/*  NA    R/W touchscreen software lock register. */
-+#define EP93XX_TOUCHSCREEN_SWLOCK	EP93XX_TOUCHSCREEN_REG(0x20)
-+/* R/W touchscreen setup control register #2. */
-+#define EP93XX_TOUCHSCREEN_SETUP2	EP93XX_TOUCHSCREEN_REG(0x24)
-+
-+/* These are duplicated in mach-ep93xx/core.c */
-+#define EP93XX_TIMER_REG(x)	(EP93XX_TIMER_BASE + (x))
-+#define EP93XX_TIMER2_LOAD	EP93XX_TIMER_REG(0x20)
-+#define EP93XX_TIMER2_VALUE	EP93XX_TIMER_REG(0x24)
-+#define EP93XX_TIMER2_CONTROL	EP93XX_TIMER_REG(0x28)
-+#define EP93XX_TIMER2_CLEAR	EP93XX_TIMER_REG(0x2c)
-+
-+/*
-+ * Register bit definitions
-+ */
-+#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
-+
-+/*
-+ * 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
-+
-+/*
-+ * 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 bFreshTouchData;
-+static int bCurrentPenDown;
-+
-+static DECLARE_WAIT_QUEUE_HEAD(queue);
-+static DEFINE_SEMAPHORE(open_sem);
-+static DEFINE_SPINLOCK(event_buffer_lock);
-+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);
-+
-+/*
-+ *  ep93xx_ts_isr
-+ */
-+static irqreturn_t ep93xx_ts_isr(int irq, void *dev_id)
-+{
-+    /*
-+     * 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)
-+{
-+    /*
-+     * 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;
-+
-+    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)
-+{
-+    poll_wait(filp, &queue, wait);
-+
-+    if (bFreshTouchData)
-+    {
-+	return POLLIN | POLLRDNORM;
-+    }
-+
-+    return 0;
-+}
-+
-+static int ep93xx_ts_open(struct inode *inode, struct file *filp)
-+{
-+    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:
-+	    i = copy_to_user((void __user *)u, (void *)version, sizeof(version));
-+	    iReturn = i ? -EFAULT : 0;
-+	    break;
-+
-+	case EVIOCGBIT(0,sizeof(u_int32_t) * 8) :
-+	    i = copy_to_user((void __user *)u, (void *)bit, sizeof(bit));
-+	    iReturn = i ? -EFAULT : 0;
-+	    break;
-+
-+	case EVIOCGBIT(EV_ABS, sizeof(absbit) * 8):
-+	    i = copy_to_user((void __user *)u, (void *)absbit, sizeof(absbit));
-+	    iReturn = i ? -EFAULT : 0;
-+	    break;
-+	default:
-+	    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,
-+    unlocked_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;
-+
-+    /*
-+     * Set the TSEN bit in KTDIV so that we are enabling the clock
-+     * for the touchscreen.
-+     */
-+    uiKTDIV = __raw_readl(EP93XX_SYSCON_KEYTCHCLKDIV);
-+    uiKTDIV |= EP93XX_SYSCON_KEYTCHCLKDIV_TSEN;
-+    ep93xx_syscon_swlocked_write(uiKTDIV, EP93XX_SYSCON_KEYTCHCLKDIV);
-+
-+    /*
-+     * Program the EP93XX_TOUCHSCREEN_SETUP and TSSetup2 registers.
-+     */
-+    __raw_writel(TSSETUP_DEFAULT, EP93XX_TOUCHSCREEN_SETUP);
-+    __raw_writel(TSSETUP2_DEFAULT, EP93XX_TOUCHSCREEN_SETUP2);
-+
-+    /*
-+     * Set the the touch settings.
-+     */
-+    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+    __raw_writel(sSwitchSettings.uiDischarge, EP93XX_TOUCHSCREEN_DIRECT);
-+
-+    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+    __raw_writel(sSwitchSettings.uiDischarge, EP93XX_TOUCHSCREEN_DISCHARGE);
-+
-+    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+    __raw_writel(sSwitchSettings.uiSwitchZ1, EP93XX_TOUCHSCREEN_XSAMPLE);
-+
-+    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+    __raw_writel(sSwitchSettings.uiSwitchZ2, EP93XX_TOUCHSCREEN_YSAMPLE);
-+
-+    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+    __raw_writel(sSwitchSettings.uiDetect, EP93XX_TOUCHSCREEN_DETECT);
-+
-+    /*
-+     * 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;
-+    __raw_writel(uiTSXYMaxMin, EP93XX_TOUCHSCREEN_XYMAXMIN);
-+
-+    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;
-+
-+    sTouch.state = TS_STATE_STOPPED;
-+    Stop_Timer2();
-+
-+    /*
-+     * Disable the scanning engine.
-+     */
-+    __raw_writel(0, EP93XX_TOUCHSCREEN_SETUP);
-+    __raw_writel(0, EP93XX_TOUCHSCREEN_SETUP2);
-+
-+    /*
-+     * Clear the TSEN bit in KTDIV so that we are disabling the clock
-+     * for the touchscreen.
-+     */
-+    uiKTDIV = __raw_readl(EP93XX_SYSCON_KEYTCHCLKDIV);
-+    uiKTDIV &= ~EP93XX_SYSCON_KEYTCHCLKDIV_TSEN;
-+    ep93xx_syscon_swlocked_write(uiKTDIV, EP93XX_SYSCON_KEYTCHCLKDIV);
-+
-+} /* ep93xx_ts_shutdown */
-+
-+static irqreturn_t ep93xx_timer2_isr(int irq, void *dev_id)
-+{
-+    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);
-+
-+	    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+	    __raw_writel(sSwitchSettings.uiDischarge, EP93XX_TOUCHSCREEN_DIRECT);
-+
-+	    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.
-+     */
-+    __raw_writel(1, EP93XX_TIMER2_CLEAR);
-+    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();
-+
-+    /*
-+     * 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)
-+    {
-+	bCurrentPenDown = 0;
-+	ee93xx_ts_evt_add(0, guiLastX, guiLastY, 0);
-+	TS_Hardware_Scan_Mode();
-+	return;
-+    }
-+
-+    /*
-+     * Hysteresis:
-+     * 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)
-+	    {
-+		bValidPoint = 1;
-+	    }
-+	}
-+	else
-+	{
-+	    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;
-+    }
-+
-+    TS_Hardware_Scan_Mode();
-+}
-+
-+static void ep93xx_ts_set_direct(unsigned int uiADCSwitch)
-+{
-+    unsigned int uiResult;
-+
-+    /*
-+     * Set the switch settings in the direct register.
-+     */
-+    __raw_writel(0xaa, EP93XX_TOUCHSCREEN_SWLOCK);
-+    __raw_writel(uiADCSwitch, EP93XX_TOUCHSCREEN_DIRECT);
-+
-+    /*
-+     * Read and throw away the first sample.
-+     */
-+    do {
-+	uiResult = __raw_readl(EP93XX_TOUCHSCREEN_XYRESULT);
-+    } 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 = __raw_readl(EP93XX_TOUCHSCREEN_XYRESULT);
-+	    } 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;
-+
-+    /*
-+     * 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 = __raw_readl(EP93XX_SYSCON_DEVCFG);
-+    ep93xx_syscon_swlocked_write(uiDevCfg & ~EP93XX_SYSCON_DEVCFG_TIN,
-+				 EP93XX_SYSCON_DEVCFG);
-+
-+    /*
-+     * Enable the touch screen scanning state machine by setting
-+     * the ENABLE bit.
-+     */
-+    __raw_writel(TSSETUP_DEFAULT | TSSETUP_ENABLE, EP93XX_TOUCHSCREEN_SETUP);
-+
-+    /*
-+     * Set the flag to show that we are in interrupt mode.
-+     */
-+    gScanningMode = TS_MODE_HARDWARE_SCAN;
-+
-+    /*
-+     * Initialize EP93XX_TOUCHSCREEN_SETUP2 register.
-+     */
-+    __raw_writel(TSSETUP2_DEFAULT, EP93XX_TOUCHSCREEN_SETUP2);
-+
-+}
-+
-+/*
-+ * TS_Soft_Scan_Mode
-+ *
-+ * Sets the touch screen to manual polling mode.
-+ */
-+static void TS_Soft_Scan_Mode(void)
-+{
-+    unsigned int uiDevCfg;
-+
-+    if (gScanningMode != TS_MODE_SOFT_SCAN)
-+    {
-+	/*
-+	 * Disable the touch screen scanning state machine by clearing
-+	 * the ENABLE bit.
-+	 */
-+	__raw_writel(TSSETUP_DEFAULT, EP93XX_TOUCHSCREEN_SETUP);
-+
-+	/*
-+	 * Set the TIN bit so we can do manual touchscreen polling.
-+	 */
-+	uiDevCfg = __raw_readl(EP93XX_SYSCON_DEVCFG);
-+	ep93xx_syscon_swlocked_write(uiDevCfg | EP93XX_SYSCON_DEVCFG_TIN,
-+				     EP93XX_SYSCON_DEVCFG);
-+    }
-+
-+    /*
-+     * 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
-+     */
-+    __raw_writel(0, EP93XX_TIMER2_CONTROL);
-+
-+    uiClockTicks = ((uiDelay_uSec * 508) + 999) / 1000;
-+    __raw_writel(uiClockTicks, EP93XX_TIMER2_LOAD);
-+    __raw_writel(uiClockTicks, EP93XX_TIMER2_VALUE);
-+
-+    /*
-+     * Set up Timer 2 for 508 kHz clock and periodic mode.
-+     */
-+    __raw_writel(0xC8, EP93XX_TIMER2_CONTROL);
-+
-+}
-+
-+static void Stop_Timer2(void)
-+{
-+    __raw_writel(0, EP93XX_TIMER2_CONTROL);
-+}
-+
-+/*
-+ * Initialization and exit routines
-+ */
-+int __init ep93xx_ts_init(void)
-+{
-+    int retval;
-+
-+    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;
-+    }
-+
-+    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");
-+	free_irq(IRQ_EP93XX_TOUCH, 0);
-+	return retval;
-+    }
-+
-+    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)
-+{
-+    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");
-+MODULE_LICENSE("GPL");