[PATCHv1 -next] Touch: Touch screen module of DA9052 PMIC driver

From: Ashish Jangam
Date: Tue Apr 26 2011 - 06:54:22 EST

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Hi Randy,

Touch Screen Driver for Dialog Semiconductor DA9052 PMICs.

Changes made since last submission:
. read and write operation move to MFD.

Signed-off-by: D. Chen <dchen@xxxxxxxxxxx>
---

diff -Naur linux-next-20110421.orig/drivers/input/touchscreen/da9052_tsi.c linux-next-20110421/drivers/input/touchscreen/da9052_tsi.c
--- linux-next-20110421.orig/drivers/input/touchscreen/da9052_tsi.c 1970-01-01 05:00:00.000000000 +0500
+++ linux-next-20110421/drivers/input/touchscreen/da9052_tsi.c 2011-04-26 10:51:28.000000000 +0500
@@ -0,0 +1,474 @@
+/*
+ * TSI driver for Dialog DA9052
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * Author: Dajun Chen <dchen@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/freezer.h>
+#include <linux/kthread.h>
+
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/tsi.h>
+#include <linux/mfd/da9052/gpio.h>
+#include <linux/mfd/da9052/pdata.h>
+
+ssize_t tsi_process_thread(void *ptr);
+
+int da9052_fifo_lengthToEnd(struct da9052_tsi_fifo *fifo, long op)
+{
+ if (op == idRead)
+ return TSI_FIFO_SIZE - fifo->m_read;
+ else
+ return TSI_FIFO_SIZE - fifo->m_write;
+}
+
+inline void da9052_fifo_incpos(struct da9052_tsi_fifo *fifo, int inc, int op)
+{
+ int *pos;
+
+ if (inc < 0 || inc > TSI_FIFO_SIZE)
+ return;
+
+ pos = &fifo->m_write;
+ if (op == idRead)
+ pos = &fifo->m_read;
+
+ if (*pos < TSI_FIFO_SIZE - 1)
+ *pos += inc;
+ else
+ *pos = 0;
+
+ if (fifo->m_read == fifo->m_write) {
+ fifo->m_wrapType = idWriteWrap;
+ if (op == idRead)
+ fifo->m_wrapType = idReadWrap;
+ } else
+ fifo->m_wrapType = idNoWrap;
+
+ return;
+}
+
+void da9052_fifo_getcount(int *count, long op,
+ struct da9052_tsi_fifo *fifo)
+{
+ int write = fifo->m_write;
+ int read = fifo->m_read;
+
+ *count = 0;
+ if (write == read)
+ *count = 0;
+ else if (write > read)
+ *count = (TSI_FIFO_SIZE - write) + read;
+ else
+ *count = read - write;
+
+ if (op == idRead && fifo->m_wrapType != idReadWrap)
+ *count = TSI_FIFO_SIZE - *count;
+
+ return;
+}
+
+inline void da9052_fifo_put(struct da9052_tsi_fifo *fifo,
+ struct da9052_tsi_reg temp)
+{
+ memcpy(&fifo->fifo[fifo->m_write], &temp,
+ sizeof(struct da9052_tsi_reg));
+ da9052_fifo_incpos(fifo, 1, idWrite);
+}
+
+struct da9052_tsi_reg da9052_fifo_get(struct da9052_tsi_fifo *fifo)
+{
+ struct da9052_tsi_reg temp;
+ long lenToEnd = da9052_fifo_lengthToEnd(fifo, idRead);
+
+ if (lenToEnd > 0)
+ memcpy(&temp, &fifo->fifo[fifo->m_read],
+ sizeof(struct da9052_tsi_reg));
+ else
+ memcpy(&temp, &fifo->fifo[0],
+ sizeof(struct da9052_tsi_reg));
+
+ da9052_fifo_incpos(fifo, 1, idRead);
+
+ return temp;
+}
+
+static inline int start_tsi(struct da9052_tsi *tsi)
+{
+ return da9052_reg_update(tsi->da9052, DA9052_TSICONT_A_REG,
+ 1 << 0, 1 << 0);
+}
+
+static inline int stop_tsi(struct da9052_tsi *tsi)
+{
+ return da9052_clear_bits(tsi->da9052, DA9052_TSICONT_A_REG, 1 << 0);
+}
+
+static irqreturn_t da9052_tsi_pendwn(int irq, void *data)
+{
+ struct da9052_tsi *tsi = (struct da9052_tsi *)data;
+ int ret = 0;
+
+ ret = da9052_mask_events(tsi->da9052, DA9052_E_PEN_DOWN);
+ if (ret < 0) {
+ dev_err(tsi->da9052->dev, "Failed to mask pen down event, %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ ret = da9052_unmask_events(tsi->da9052, DA9052_E_TSI_READY);
+ if (ret < 0) {
+ dev_err(tsi->da9052->dev, "Failed to mask tsi ready event, %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ start_tsi(tsi);
+
+ tsi->pen_state = DA9052_PEN_DOWN;
+
+ return IRQ_HANDLED;
+}
+
+static int read_tsi(struct da9052_tsi *tsi)
+{
+ struct da9052_tsi_reg co_ord = {0, 0};
+ int ret;
+ uint8_t _x, _y, _v;
+
+ ret = da9052_reg_read(tsi->da9052, DA9052_TSIXMSB_REG);
+ if (ret < 0)
+ return ret;
+ _x = (uint8_t) ret;
+
+ ret = da9052_reg_read(tsi->da9052, DA9052_TSIYMSB_REG);
+ if (ret < 0)
+ return ret;
+
+ _y = (uint8_t) ret;
+
+ ret = da9052_reg_read(tsi->da9052, DA9052_TSILSB_REG);
+ if (ret < 0)
+ return ret;
+
+ _v = (uint8_t) ret;
+
+ co_ord.x = ((_x << 2) & 0x3fc) | (_v & 0x3);
+ co_ord.y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2);
+
+ da9052_fifo_put(&tsi->tsi_fifo, co_ord);
+
+ tsi->adc_cnt++;
+
+ return 0;
+}
+
+
+static irqreturn_t da9052_tsi_datardy(int irq, void *data)
+{
+ struct da9052_tsi *tsi = (struct da9052_tsi *)data;
+ int ret = 0;
+
+ ret = read_tsi(tsi);
+ if (ret) {
+ dev_err(tsi->da9052->dev,
+ "Failed to read TSI co-ordinate, %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ return IRQ_HANDLED;
+}
+
+void da9052_tsi_process_reg_data(struct da9052_tsi *tsi)
+{
+ struct da9052_tsi_reg tmp_raw_data;
+ u32 reg_data_cnt;
+
+ da9052_fifo_getcount(&reg_data_cnt, idRead, &tsi->tsi_fifo);
+
+ while (reg_data_cnt-- > 0) {
+ tmp_raw_data = da9052_fifo_get(&tsi->tsi_fifo);
+ da9052_fifo_put(&tsi->tsi_fifo_buf, tmp_raw_data);
+ }
+ return;
+}
+
+static void da9052_report_penup(struct da9052_tsi *tsi)
+{
+
+ struct input_dev *ip_dev = tsi->dev;
+ ssize_t ret = 0;
+
+ ret = stop_tsi(tsi);
+ if (ret < 0)
+ return;
+
+ ret = da9052_mask_events(tsi->da9052, DA9052_E_TSI_READY);
+ if (ret < 0)
+ return;
+
+ ret = da9052_unmask_events(tsi->da9052, DA9052_E_PEN_DOWN);
+ if (ret < 0)
+ return;
+
+ input_report_abs(ip_dev, BTN_TOUCH, 0);
+ input_sync(ip_dev);
+
+ tsi->zero_data_cnt = 0;
+ tsi->adc_cnt = 0;
+ tsi->filter_cnt = 0;
+
+}
+
+static ssize_t monitor_pen_state(void *data)
+{
+ struct da9052_tsi *tsi = (struct da9052_tsi *) data;
+ u32 data_cnt;
+
+ set_freezable();
+
+ while (tsi->tsi_pen_state_thread.state == DA9052_ACTIVE) {
+ try_to_freeze();
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(msecs_to_jiffies(10));
+
+ if (tsi->pen_state != DA9052_PEN_DOWN)
+ continue;
+
+ da9052_fifo_getcount(&data_cnt, idRead, &tsi->tsi_fifo);
+ da9052_tsi_process_reg_data(tsi);
+
+ if (data_cnt)
+ tsi->zero_data_cnt = 0;
+ else {
+ if ((++(tsi->zero_data_cnt)) >
+ tsi->valid_penup_count) {
+ tsi->pen_state = DA9052_PEN_UP;
+ da9052_report_penup(tsi);
+ }
+ }
+ }
+
+ complete_and_exit(&tsi->tsi_pen_state_thread.notifier, 0);
+ return 0;
+}
+
+static ssize_t da9052_configure_gpio(struct da9052 *da9052)
+{
+ ssize_t ret = 0;
+
+ ret = da9052_clear_bits(da9052, DA9052_GPIO_2_3_REG, 0x30);
+ if (ret < 0)
+ return -EIO;
+
+ return ret;
+}
+
+
+static ssize_t __init da9052_tsi_enable_device(struct da9052_tsi *tsi)
+{
+
+ ssize_t ret = 0;
+
+ ret = da9052_configure_gpio(tsi->da9052);
+ if (ret < 0)
+ return ret;
+
+ ret = da9052_reg_update(tsi->da9052, DA9052_TSICONT_A_REG, 0xFC, 0xC0);
+ if (ret < 0)
+ return ret;
+
+ tsi->valid_penup_count = 5;
+
+ init_completion(&tsi->tsi_pen_state_thread.notifier);
+ tsi->tsi_pen_state_thread.state = DA9052_ACTIVE;
+ tsi->tsi_pen_state_thread.pid =
+ kernel_thread(monitor_pen_state,
+ tsi, CLONE_KERNEL | SIGCHLD);
+
+ init_completion(&tsi->tsi_filter_thread.notifier);
+ tsi->tsi_filter_thread.state = DA9052_ACTIVE;
+ tsi->tsi_filter_thread.pid =
+ kernel_thread(tsi_process_thread,
+ tsi, CLONE_KERNEL | SIGCHLD);
+
+ tsi->zero_data_cnt = 0;
+ tsi->adc_cnt = 0;
+ tsi->filter_cnt = 0;
+
+ ret = da9052_reg_update(tsi->da9052, DA9052_ADC_CONT_REG,
+ 1 << 6, 1 << 6);
+ if (ret < 0)
+ return ret;
+
+ ret = da9052_reg_update(tsi->da9052, DA9052_TSICONT_A_REG,
+ 1 << 1, 1 << 1);
+ if (ret < 0)
+ return ret;
+
+ ret = da9052_mask_events(tsi->da9052, DA9052_E_TSI_READY);
+ if (ret < 0)
+ return ret;
+
+ ret = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x59);
+
+ return ret;
+}
+
+static s32 __devinit da9052_tsi_probe(struct platform_device *pdev)
+{
+
+ struct da9052_tsi *tsi;
+ struct input_dev *input_dev;
+ struct da9052_pdata *pdata;
+ struct da9052 *da9052;
+ struct da9052_tsi_platform_data *ptsi;
+ int ret;
+
+ da9052 = dev_get_drvdata(pdev->dev.parent);
+ pdata = da9052->dev->platform_data;
+ ptsi = pdata->ptsi;
+
+ tsi = kzalloc(sizeof(struct da9052_tsi), GFP_KERNEL);
+ if (!tsi)
+ return -ENOMEM;
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(tsi->da9052->dev,
+ "failed to allocate input device\n");
+ ret = -ENOMEM;
+ goto err_mem;
+ }
+
+ tsi->da9052 = dev_get_drvdata(pdev->dev.parent);
+ tsi->pen_up_detect_interval = ptsi->pen_up_detect_interval;
+ platform_set_drvdata(pdev, tsi);
+
+ input_dev->id.version = 0x0101;
+ input_dev->id.vendor = 0x15B6;
+ input_dev->id.product = 0x9052;
+ input_dev->id.bustype = BUS_RS232;
+ input_dev->name = "Dialog DA9052 TouchScreen Driver";
+ input_dev->dev.parent = &pdev->dev;
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+ __set_bit(ABS_X, input_dev->absbit);
+ __set_bit(ABS_Y, input_dev->absbit);
+
+ input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0);
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1023, 0, 0);
+
+ tsi->dev = input_dev;
+ input_set_drvdata(input_dev, tsi);
+ ret = input_register_device(tsi->dev);
+ if (ret)
+ goto err_mem;
+
+ tsi->irq_pendwn = platform_get_irq_byname(pdev, "PENDWN");
+ ret = request_threaded_irq(tsi->da9052->irq_base + tsi->irq_pendwn,
+ NULL, da9052_tsi_pendwn,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "PENDWN", tsi);
+ if (ret < 0) {
+ dev_err(tsi->da9052->dev, "Failed to register %s IRQ %d, error = %d \n", "PENDWN",
+ tsi->da9052->irq_base + tsi->irq_pendwn, ret);
+ goto err_mem;
+ }
+
+ tsi->irq_datardy = platform_get_irq_byname(pdev, "TSIRDY");
+ ret = request_threaded_irq(tsi->da9052->irq_base + tsi->irq_datardy,
+ NULL, da9052_tsi_datardy,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "TSIRDY", tsi);
+ if (ret < 0) {
+ dev_err(tsi->da9052->dev, "Failed to register %s IRQ %d, error = %d \n", "TSIRDY",
+ tsi->da9052->irq_base + tsi->irq_datardy,
+ ret);
+ goto err_mem;
+ }
+
+ ret = da9052_tsi_enable_device(tsi);
+ if (ret < 0)
+ goto err_input;
+
+ tsi->adc_cnt = 0;
+ tsi->filter_cnt = 0;
+
+ return 0;
+
+err_input:
+ input_free_device(input_dev);
+err_mem:
+ kfree(tsi);
+ return ret;
+}
+
+static int __devexit da9052_tsi_remove(struct platform_device *pdev)
+{
+ struct da9052_tsi *tsi = platform_get_drvdata(pdev);
+ s32 ret = 0;
+
+ ret = da9052_clear_bits(tsi->da9052, DA9052_TSICONT_A_REG, 1 << 0);
+ if (ret < 0)
+ return ret;
+
+ ret = da9052_reg_write(tsi->da9052, DA9052_LDO9_REG, 0x19);
+ if (ret < 0)
+ return ret;
+
+ free_irq(tsi->da9052->irq_base + tsi->irq_pendwn, NULL);
+ free_irq(tsi->da9052->irq_base + tsi->irq_datardy, NULL);
+
+ tsi->tsi_pen_state_thread.state = DA9052_INACTIVE;
+ wait_for_completion(&tsi->tsi_pen_state_thread.notifier);
+
+ tsi->tsi_filter_thread.state = DA9052_INACTIVE;
+ wait_for_completion(&tsi->tsi_filter_thread.notifier);
+
+ input_unregister_device(tsi->dev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(tsi);
+
+ return 0;
+}
+
+static struct platform_driver da9052_tsi_driver = {
+ .driver.name = "da9052-tsi",
+ .driver.owner = THIS_MODULE,
+ .probe = da9052_tsi_probe,
+ .remove = __devexit_p(da9052_tsi_remove),
+
+};
+
+static int __init da9052_tsi_init(void)
+{
+ return platform_driver_register(&da9052_tsi_driver);
+}
+module_init(da9052_tsi_init);
+
+static void __exit da9052_tsi_exit(void)
+{
+ platform_driver_unregister(&da9052_tsi_driver);
+
+}
+module_exit(da9052_tsi_exit);
+
+MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9052");
+MODULE_AUTHOR("Dialog Semiconductor Ltd <dchen@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
+
diff -Naur linux-next-20110421.orig/drivers/input/touchscreen/da9052_tsi_filter.c linux-next-20110421/drivers/input/touchscreen/da9052_tsi_filter.c
--- linux-next-20110421.orig/drivers/input/touchscreen/da9052_tsi_filter.c 1970-01-01 05:00:00.000000000 +0500
+++ linux-next-20110421/drivers/input/touchscreen/da9052_tsi_filter.c 2011-04-26 10:51:28.000000000 +0500
@@ -0,0 +1,87 @@
+/*
+ * TSI filter driver for Dialog DA9052
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * Author: Dialog Semiconductor Ltd <dchen@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/input.h>
+#include <linux/freezer.h>
+#include <linux/mfd/da9052/tsi.h>
+
+#define DEFAULT_AVERAGE_FILTER_SIZE 3
+
+#if ENABLE_AVERAGE_FILTER
+static void da9052_tsi_avrg_filter(struct da9052_tsi *tsi,
+ struct da9052_tsi_reg *tsi_avg_data)
+{
+ u8 cnt;
+ struct da9052_tsi_reg temp;
+
+ *tsi_avg_data = da9052_fifo_get(&tsi->tsi_fifo_buf);
+
+ for (cnt = 2; cnt <= TSI_AVERAGE_FILTER_SIZE; cnt++) {
+
+ temp = da9052_fifo_get(&tsi->tsi_fifo_buf);
+ tsi_avg_data->x += temp.x;
+ tsi_avg_data->y += temp.y;
+
+ }
+
+
+ tsi_avg_data->x /= TSI_AVERAGE_FILTER_SIZE;
+ tsi_avg_data->y /= TSI_AVERAGE_FILTER_SIZE;
+
+ tsi->filter_cnt++;
+
+ return;
+}
+#endif
+
+ssize_t tsi_process_thread(void *ptr)
+{
+ struct da9052_tsi_reg coord;
+ int cnt = 0;
+ struct da9052_tsi *tsi = (struct da9052_tsi *)ptr;
+
+ set_freezable();
+
+ while (tsi->tsi_filter_thread.state == DA9052_ACTIVE) {
+
+ try_to_freeze();
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(msecs_to_jiffies(10));
+ da9052_fifo_getcount(&cnt, idRead, &tsi->tsi_fifo_buf);
+
+ if (cnt == 0)
+ continue;
+
+#if ENABLE_AVERAGE_FILTER
+ if (cnt < TSI_AVERAGE_FILTER_SIZE)
+ continue;
+ da9052_tsi_avrg_filter(tsi, &coord);
+#else
+ coord = da9052_fifo_get(&tsi->tsi_fifo_buf);
+#endif
+ input_report_abs(tsi->dev, BTN_TOUCH, 1);
+ input_report_abs(tsi->dev, ABS_X, coord.x);
+ input_report_abs(tsi->dev, ABS_Y, coord.y);
+ input_sync(tsi->dev);
+
+ }
+
+ tsi->tsi_filter_thread.thread_task = NULL;
+ complete_and_exit(&tsi->tsi_filter_thread.notifier, 0);
+
+ return 0;
+
+}
+
diff -Naur linux-next-20110421.orig/drivers/input/touchscreen/Kconfig linux-next-20110421/drivers/input/touchscreen/Kconfig
--- linux-next-20110421.orig/drivers/input/touchscreen/Kconfig 2011-04-26 09:32:55.000000000 +0500
+++ linux-next-20110421/drivers/input/touchscreen/Kconfig 2011-04-26 10:59:02.000000000 +0500
@@ -144,6 +144,13 @@
Say Y here to enable the support for the touchscreen found
on Dialog Semiconductor DA9034 PMIC.

+config TOUCHSCREEN_DA9052
+ tristate "Dialog DA9052 TSI"
+ depends on PMIC_DA9052
+ help
+ Say y here to support the touchscreen found on
+ Dialog Semiconductor DA9052 PMIC
+
config TOUCHSCREEN_DYNAPRO
tristate "Dynapro serial touchscreen"
select SERIO
diff -Naur linux-next-20110421.orig/drivers/input/touchscreen/Makefile linux-next-20110421/drivers/input/touchscreen/Makefile
--- linux-next-20110421.orig/drivers/input/touchscreen/Makefile 2011-04-26 09:32:55.000000000 +0500
+++ linux-next-20110421/drivers/input/touchscreen/Makefile 2011-04-26 10:56:56.000000000 +0500
@@ -4,6 +4,7 @@

# Each configuration option enables a list of files.

+da9052-tsi-objs := da9052_tsi.o da9052_tsi_filter.o
wm97xx-ts-y := wm97xx-core.o

obj-$(CONFIG_TOUCHSCREEN_88PM860X) += 88pm860x-ts.o
@@ -18,6 +19,7 @@
obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o
+obj-$(CONFIG_TOUCHSCREEN_DA9052) += da9052-tsi.o
obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o
obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o
obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o
diff -Naur linux-next-20110421.orig/include/linux/mfd/da9052/tsi.h linux-next-20110421/include/linux/mfd/da9052/tsi.h
--- linux-next-20110421.orig/include/linux/mfd/da9052/tsi.h 1970-01-01 05:00:00.000000000 +0500
+++ linux-next-20110421/include/linux/mfd/da9052/tsi.h 2011-04-26 10:53:05.000000000 +0500
@@ -0,0 +1,102 @@
+/*
+ * da9052 TSI module declarations.
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef __LINUX_MFD_DA9052_TSI_H
+#define __LINUX_MFD_DA9052_TSI_H
+
+#include <linux/mfd/da9052/da9052.h>
+
+#define TSI_FIFO_SIZE 16
+#define ENABLE_AVERAGE_FILTER 1
+
+#define TSI_AVERAGE_FILTER_SIZE 3
+#define DA9052_ACTIVE 1
+#define DA9052_INACTIVE 0
+
+enum {
+ DA9052_PEN_IDLE,
+ DA9052_PEN_DOWN,
+ DA9052_PEN_UP
+};
+
+
+
+enum {
+ idRead,
+ idWrite
+};
+
+enum {
+ idNoWrap,
+ idReadWrap,
+ idWriteWrap
+};
+
+struct da9052_tsi_reg {
+ u16 x;
+ u16 y;
+};
+
+struct da9052_tsi_fifo {
+ int m_write;
+ int m_read;
+ int m_wrapType;
+ struct da9052_tsi_reg fifo[TSI_FIFO_SIZE];
+
+};
+
+struct da9052_tsi_platform_data {
+ u8 pen_up_detect_interval;
+};
+
+struct tsi_thread_type {
+ u8 pid;
+ u8 state;
+ struct completion notifier;
+ struct task_struct *thread_task;
+} ;
+
+
+struct da9052_tsi {
+ struct da9052 *da9052;
+ struct input_dev *dev;
+ struct tsi_thread_type tsi_pen_state_thread;
+ struct tsi_thread_type tsi_filter_thread;
+ struct da9052_tsi_fifo tsi_fifo;
+ struct da9052_tsi_fifo tsi_fifo_buf;
+ struct da9052_tsi_reg read_buf[TSI_AVERAGE_FILTER_SIZE];
+ u32 pen_up_detect_interval;
+ u32 zero_data_cnt;
+ u32 valid_penup_count;
+ u8 pen_state;
+ int adc_cnt;
+ int filter_cnt;
+ int irq_pendwn;
+ int irq_datardy;
+};
+
+struct da9052_tsi_reg da9052_fifo_get(struct da9052_tsi_fifo *fifo);
+void da9052_fifo_put(struct da9052_tsi_fifo *fifo, struct da9052_tsi_reg temp);
+void da9052_fifo_getcount(int *count, long op, struct da9052_tsi_fifo *fifo);
+void da9052_fifo_incpos(struct da9052_tsi_fifo *fifo, int inc, int op);
+int da9052_fifo_lengthToEnd(struct da9052_tsi_fifo *fifo, long op);
+
+#endif /* __LINUX_MFD_DA9052_TSI_H */

Regards,
Ashish

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