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author | Florian Fainelli <florian@openwrt.org> | 2011-06-19 20:09:00 +0000 |
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committer | Florian Fainelli <florian@openwrt.org> | 2011-06-19 20:09:00 +0000 |
commit | 67d0ca0b4b090327ba9fd26abfdcd5636d938a9f (patch) | |
tree | c2cf407c5390b2675e133f50a30ef36b6b66f896 /target/linux/ep93xx/patches-2.6.36/003-ep93xx_touchscreen.patch | |
parent | 34db3f9f86ae2b378df26575472f1d423736c49e (diff) | |
download | master-31e0f0ae-67d0ca0b4b090327ba9fd26abfdcd5636d938a9f.tar.gz master-31e0f0ae-67d0ca0b4b090327ba9fd26abfdcd5636d938a9f.tar.bz2 master-31e0f0ae-67d0ca0b4b090327ba9fd26abfdcd5636d938a9f.zip |
remove pre 2.6.39 patches and config
SVN-Revision: 27229
Diffstat (limited to 'target/linux/ep93xx/patches-2.6.36/003-ep93xx_touchscreen.patch')
-rw-r--r-- | target/linux/ep93xx/patches-2.6.36/003-ep93xx_touchscreen.patch | 1060 |
1 files changed, 0 insertions, 1060 deletions
diff --git a/target/linux/ep93xx/patches-2.6.36/003-ep93xx_touchscreen.patch b/target/linux/ep93xx/patches-2.6.36/003-ep93xx_touchscreen.patch deleted file mode 100644 index 09cae7aa0c..0000000000 --- a/target/linux/ep93xx/patches-2.6.36/003-ep93xx_touchscreen.patch +++ /dev/null @@ -1,1060 +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 -@@ -153,6 +153,15 @@ config TOUCHSCREEN_EETI - To compile this driver as a module, choose M here: the - module will be called eeti_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 -@@ -21,6 +21,7 @@ obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += h - obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o - obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o - obj-$(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_MC13783) += mc13783_ts.o ---- /dev/null -+++ b/drivers/input/touchscreen/ep93xx_ts.c -@@ -0,0 +1,1020 @@ -+/* -+ * 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> -+ -+/* 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 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); -+ -+/* -+ * 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"); |