diff options
Diffstat (limited to 'target/linux/ep93xx/patches-2.6.30/006-ep93xx-touchscreen.patch')
| -rw-r--r-- | target/linux/ep93xx/patches-2.6.30/006-ep93xx-touchscreen.patch | 1319 |
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..6a0d5dbfd6 --- /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_ */ |