Date:	Tue,  4 Jan 2011 16:54:04 -0800
From:	Kevin McNeely <kev@...ress.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	David Brown <davidb@...eaurora.org>,
	Trilok Soni <tsoni@...eaurora.org>,
	Kevin McNeely <kev@...ress.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Mike Frysinger <vapier@...too.org>,
	Alan Cox <alan@...ux.intel.com>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [v4 1/3] 1/3 Touchscreen: Cypress TTSP G3 Core Driver

Cypress TTSP Gen3 Core Driver.
Core Driver includes platform data definition file,
core driver definition file, and core touchscreen
touch handling of device data. Generates
multi-touch input events.

Signed-off-by: Kevin McNeely <kev@...ress.com>
---
Changes since v3:
- Removed unused items
- replace EIO with EINVAL
- add x[], y[] and loop on mt signaling
- removed uninitialized use of ts->dev

 drivers/input/touchscreen/Kconfig       |    5 +
 drivers/input/touchscreen/Makefile      |    1 +
 drivers/input/touchscreen/cyttsp_core.c |  794 +++++++++++++++++++++++++++++++
 drivers/input/touchscreen/cyttsp_core.h |   55 +++
 include/linux/input/cyttsp.h            |   68 +++
 5 files changed, 923 insertions(+), 0 deletions(-)
 create mode 100644 drivers/input/touchscreen/cyttsp_core.c
 create mode 100644 drivers/input/touchscreen/cyttsp_core.h
 create mode 100644 include/linux/input/cyttsp.h

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 06ea8da..c3240b8 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -124,6 +124,11 @@ config TOUCHSCREEN_CY8CTMG110
 	  To compile this driver as a module, choose M here: the
 	  module will be called cy8ctmg110_ts.
 
+config TOUCHSCREEN_CYTTSP_CORE
+	tristate "Cypress TTSP touchscreen core"
+	help
+	  Always activated for Cypress TTSP touchscreen
+
 config TOUCHSCREEN_DA9034
 	tristate "Touchscreen support for Dialog Semiconductor DA9034"
 	depends on PMIC_DA903X
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 7cc1b4f..b6f1ba8 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC)	+= atmel_tsadcc.o
 obj-$(CONFIG_TOUCHSCREEN_BITSY)		+= h3600_ts_input.o
 obj-$(CONFIG_TOUCHSCREEN_BU21013)       += bu21013_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE)   += cyttsp_core.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
 obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o
 obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE)	+= hampshire.o
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
new file mode 100644
index 0000000..07b4840
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -0,0 +1,794 @@
+/*
+ * Core Source for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
+ * For use with Cypress Txx3xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <kev@...ress.com>
+ *
+ */
+
+#include "cyttsp_core.h"
+
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+/* Bootloader number of command keys */
+#define CY_NUM_BL_KEYS    8
+
+/* helpers */
+#define GET_NUM_TOUCHES(x)          ((x) & 0x0F)
+#define IS_LARGE_AREA(x)            (((x) & 0x10) >> 4)
+#define IS_BAD_PKT(x)               ((x) & 0x20)
+#define IS_VALID_APP(x)             ((x) & 0x01)
+#define IS_OPERATIONAL_ERR(x)       ((x) & 0x3F)
+#define GET_HSTMODE(reg)            ((reg & 0x70) >> 4)
+#define GET_BOOTLOADERMODE(reg)     ((reg & 0x10) >> 4)
+
+#define CY_REG_BASE                 0x00
+#define CY_REG_ACT_DIST             0x1E
+#define CY_REG_ACT_INTRVL           0x1D
+#define CY_REG_TCH_TMOUT            (CY_REG_ACT_INTRVL+1)
+#define CY_REG_LP_INTRVL            (CY_REG_TCH_TMOUT+1)
+#define CY_MAXZ                     255
+#define CY_DELAY_DFLT               20 /* ms */
+#define CY_DELAY_MAX                (500/CY_DELAY_DFLT) /* half second */
+#define CY_ACT_DIST_DFLT            0xF8
+#define CY_HNDSHK_BIT               0x80
+/* device mode bits */
+#define CY_OPERATE_MODE             0x00
+#define CY_SYSINFO_MODE             0x10
+/* power mode select bits */
+#define CY_SOFT_RESET_MODE          0x01 /* return to Bootloader mode */
+#define CY_DEEP_SLEEP_MODE          0x02
+#define CY_LOW_POWER_MODE           0x04
+
+/* TrueTouch Standard Product Gen3 interface definition */
+struct cyttsp_xydata {
+	u8 hst_mode;
+	u8 tt_mode;
+	u8 tt_stat;
+	u8 tch1_xhi;
+	u8 tch1_xlo;
+	u8 tch1_yhi;
+	u8 tch1_ylo;
+	u8 tch1_z;
+	u8 unused;
+	u8 tch2_xhi;
+	u8 tch2_xlo;
+	u8 tch2_yhi;
+	u8 tch2_ylo;
+	u8 tch2_z;
+	u8 unused_grp[13];
+	u8 tt_undef[3];
+	u8 act_dist;
+	u8 tt_reserved;
+};
+
+/* TTSP System Information interface definition */
+struct cyttsp_sysinfo_data {
+	u8 hst_mode;
+	u8 mfg_cmd;
+	u8 mfg_stat;
+	u8 cid[3];
+	u8 tt_undef1;
+	u8 uid[8];
+	u8 bl_verh;
+	u8 bl_verl;
+	u8 tts_verh;
+	u8 tts_verl;
+	u8 app_idh;
+	u8 app_idl;
+	u8 app_verh;
+	u8 app_verl;
+	u8 tt_undef[5];
+	u8 scn_typ;
+	u8 act_intrvl;
+	u8 tch_tmout;
+	u8 lp_intrvl;
+};
+
+/* TTSP Bootloader Register Map interface definition */
+#define CY_BL_CHKSUM_OK 0x01
+struct cyttsp_bootloader_data {
+	u8 bl_file;
+	u8 bl_status;
+	u8 bl_error;
+	u8 blver_hi;
+	u8 blver_lo;
+	u8 bld_blver_hi;
+	u8 bld_blver_lo;
+	u8 ttspver_hi;
+	u8 ttspver_lo;
+	u8 appid_hi;
+	u8 appid_lo;
+	u8 appver_hi;
+	u8 appver_lo;
+	u8 cid_0;
+	u8 cid_1;
+	u8 cid_2;
+};
+
+struct cyttsp {
+	struct device *dev;
+	int irq;
+	struct input_dev *input;
+	char phys[32];
+	const struct bus_type *bus_type;
+	const struct cyttsp_platform_data *platform_data;
+	struct cyttsp_bus_ops *bus_ops;
+	struct cyttsp_xydata xy_data;
+	struct cyttsp_bootloader_data bl_data;
+	struct cyttsp_sysinfo_data sysinfo_data;
+	struct completion bl_ready;
+	enum cyttsp_powerstate power_state;
+};
+
+static const u8 bl_command[] = {
+	0x00,			/* file offset */
+	0xFF,			/* command */
+	0xA5,			/* exit bootloader command */
+	0, 1, 2, 3, 4, 5, 6, 7	/* default keys */
+};
+
+static int ttsp_read_block_data(struct cyttsp *ts, u8 command,
+	u8 length, void *buf)
+{
+	int retval;
+	int tries;
+
+	if (!buf || !length)
+		return -EINVAL;
+
+	for (tries = 0, retval = -1;
+		tries < CY_NUM_RETRY && (retval < 0);
+		tries++)
+		retval = ts->bus_ops->read(ts->bus_ops, command, length, buf);
+
+	return retval;
+}
+
+static int ttsp_write_block_data(struct cyttsp *ts, u8 command,
+	u8 length, void *buf)
+{
+	int retval;
+	if (!buf || !length)
+		return -EINVAL;
+
+	retval = ts->bus_ops->write(ts->bus_ops, command, length, buf);
+
+	return retval;
+}
+
+static int ttsp_tch_ext(struct cyttsp *ts, void *buf)
+{
+	int retval;
+
+	if (!buf)
+		return -EIO;
+
+	retval = ts->bus_ops->ext(ts->bus_ops, buf);
+
+	return retval;
+}
+
+static int cyttsp_load_bl_regs(struct cyttsp *ts)
+{
+	int retval;
+
+	memset(&(ts->bl_data), 0, sizeof(struct cyttsp_bootloader_data));
+
+	retval =  ttsp_read_block_data(ts, CY_REG_BASE,
+		sizeof(ts->bl_data), &(ts->bl_data));
+
+	return retval;
+}
+
+static int cyttsp_bl_app_valid(struct cyttsp *ts)
+{
+	int retval;
+
+	retval = cyttsp_load_bl_regs(ts);
+
+	if (retval < 0)
+		return -ENODEV;
+
+	if (GET_BOOTLOADERMODE(ts->bl_data.bl_status)) {
+		if (IS_VALID_APP(ts->bl_data.bl_status)) {
+			dev_dbg(ts->dev, "%s: App found; normal boot\n",
+				__func__);
+			return 0;
+		} else {
+			dev_dbg(ts->dev, "%s: NO APP; load firmware!!\n",
+				__func__);
+			return -ENODEV;
+		}
+	} else if (GET_HSTMODE(ts->bl_data.bl_file) == CY_OPERATE_MODE) {
+		if (!(IS_OPERATIONAL_ERR(ts->bl_data.bl_status))) {
+			dev_dbg(ts->dev, "%s: Operational\n",
+				__func__);
+			return 1;
+		} else {
+			dev_dbg(ts->dev, "%s: Operational failure\n",
+				__func__);
+			return -ENODEV;
+		}
+	} else {
+		dev_dbg(ts->dev, "%s: Non-Operational failure\n",
+			__func__);
+			return -ENODEV;
+	}
+
+}
+
+static int cyttsp_exit_bl_mode(struct cyttsp *ts)
+{
+	int retval;
+	int tries;
+	u8 bl_cmd[sizeof(bl_command)];
+
+	memcpy(bl_cmd, bl_command, sizeof(bl_command));
+	if (ts->platform_data->bl_keys)
+		memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS],
+			ts->platform_data->bl_keys, sizeof(bl_command));
+
+	dev_dbg(ts->dev,
+		"%s: bl_cmd= "
+		"%02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n",
+		__func__, bl_cmd[0], bl_cmd[1], bl_cmd[2],
+		bl_cmd[3], bl_cmd[4], bl_cmd[5], bl_cmd[6],
+		bl_cmd[7], bl_cmd[8], bl_cmd[9], bl_cmd[10]);
+
+	retval = ttsp_write_block_data(ts, CY_REG_BASE,
+		sizeof(bl_cmd), (void *)bl_cmd);
+	if (retval < 0)
+		return retval;
+
+	/* wait for TTSP Device to complete switch to Operational mode */
+	tries = 0;
+	do {
+		msleep(CY_DELAY_DFLT);
+		retval = cyttsp_load_bl_regs(ts);
+	} while (!((retval == 0) &&
+		!GET_BOOTLOADERMODE(ts->bl_data.bl_status)) &&
+		(tries++ < CY_DELAY_MAX));
+
+	dev_dbg(ts->dev, "%s: check bl ready tries=%d ret=%d stat=%02X\n",
+		__func__, tries, retval, ts->bl_data.bl_status);
+
+	if (retval < 0)
+		return retval;
+	else if (GET_BOOTLOADERMODE(ts->bl_data.bl_status))
+		return -ENODEV;
+	else
+		return 0;
+}
+
+static int cyttsp_set_operational_mode(struct cyttsp *ts)
+{
+	int retval;
+	int tries;
+	u8 cmd = CY_OPERATE_MODE;
+
+	retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
+
+	if (retval < 0)
+		return retval;
+
+	/* wait for TTSP Device to complete switch to Operational mode */
+	tries = 0;
+	do {
+		msleep(CY_DELAY_DFLT);
+		retval = ttsp_read_block_data(ts, CY_REG_BASE,
+			sizeof(ts->xy_data), &(ts->xy_data));
+	} while (!((retval == 0) &&
+		(ts->xy_data.act_dist == CY_ACT_DIST_DFLT)) &&
+		(tries++ < CY_DELAY_MAX));
+
+	dev_dbg(ts->dev, "%s: check op ready tries=%d ret=%d dist=%02X\n",
+		__func__, tries, retval, ts->xy_data.act_dist);
+
+	return retval;
+}
+
+static int cyttsp_set_sysinfo_mode(struct cyttsp *ts)
+{
+	int retval;
+	int tries;
+	u8 cmd = CY_SYSINFO_MODE;
+
+	memset(&(ts->sysinfo_data), 0, sizeof(struct cyttsp_sysinfo_data));
+
+	/* switch to sysinfo mode */
+	retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (retval < 0)
+		return retval;
+
+	/* read sysinfo registers */
+	tries = 0;
+	do {
+		msleep(CY_DELAY_DFLT);
+		retval = ttsp_read_block_data(ts, CY_REG_BASE,
+			sizeof(ts->sysinfo_data), &(ts->sysinfo_data));
+	} while (!((retval == 0) &&
+		!((ts->sysinfo_data.tts_verh == 0) &&
+		(ts->sysinfo_data.tts_verl == 0))) &&
+		(tries++ < CY_DELAY_MAX));
+
+	dev_dbg(ts->dev, "%s: check sysinfo ready tries=%d ret=%d\n",
+		__func__, tries, retval);
+
+	dev_info(ts->dev, "%s: tv=%02X%02X ai=0x%02X%02X "
+		"av=0x%02X%02X ci=0x%02X%02X%02X\n", "cyttsp",
+		ts->sysinfo_data.tts_verh, ts->sysinfo_data.tts_verl,
+		ts->sysinfo_data.app_idh, ts->sysinfo_data.app_idl,
+		ts->sysinfo_data.app_verh, ts->sysinfo_data.app_verl,
+		ts->sysinfo_data.cid[0], ts->sysinfo_data.cid[1],
+		ts->sysinfo_data.cid[2]);
+
+	return retval;
+}
+
+static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
+{
+	int retval = 0;
+
+	if (ts->platform_data->act_intrvl != CY_ACT_INTRVL_DFLT ||
+		ts->platform_data->tch_tmout != CY_TCH_TMOUT_DFLT ||
+		ts->platform_data->lp_intrvl != CY_LP_INTRVL_DFLT) {
+
+		u8 intrvl_ray[3];
+
+		intrvl_ray[0] = ts->platform_data->act_intrvl;
+		intrvl_ray[1] = ts->platform_data->tch_tmout;
+		intrvl_ray[2] = ts->platform_data->lp_intrvl;
+
+		/* set intrvl registers */
+		retval = ttsp_write_block_data(ts,
+				CY_REG_ACT_INTRVL,
+				sizeof(intrvl_ray), intrvl_ray);
+
+		msleep(CY_DELAY_DFLT);
+	}
+
+	return retval;
+}
+
+static int cyttsp_soft_reset(struct cyttsp *ts)
+{
+	int retval;
+	u8 cmd = CY_SOFT_RESET_MODE;
+
+	retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (retval < 0)
+		return retval;
+
+	/* wait for interrupt to set ready completion */
+	INIT_COMPLETION(ts->bl_ready);
+
+	retval = wait_for_completion_interruptible_timeout(&ts->bl_ready,
+		msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX));
+
+	if (retval > 0)
+		retval = 0;
+
+	return retval;
+}
+
+static int cyttsp_act_dist_setup(struct cyttsp *ts)
+{
+	int retval;
+	u8 act_dist_setup;
+
+	/* Init gesture; active distance setup */
+	act_dist_setup = ts->platform_data->act_dist;
+	retval = ttsp_write_block_data(ts, CY_REG_ACT_DIST,
+		sizeof(act_dist_setup), &act_dist_setup);
+
+	return retval;
+}
+
+static int cyttsp_hndshk(struct cyttsp *ts, u8 hst_mode)
+{
+	int retval;
+	u8 cmd;
+
+	cmd = hst_mode & CY_HNDSHK_BIT ?
+		hst_mode & ~CY_HNDSHK_BIT :
+		hst_mode | CY_HNDSHK_BIT;
+
+	retval = ttsp_write_block_data(ts, CY_REG_BASE,
+		sizeof(cmd), (u8 *)&cmd);
+
+	return retval;
+}
+
+/* process current touches */
+#define CY_MAX_TCH	2
+static int cyttsp_xy_worker(struct cyttsp *ts)
+{
+	u8 num_cur_tch;
+	u16 x[CY_MAX_TCH];
+	u16 y[CY_MAX_TCH];
+	u8 z[CY_MAX_TCH];
+	bool t[CY_MAX_TCH];
+	int i;
+
+	/* Get touch data from CYTTSP device */
+	if (ttsp_read_block_data(ts,
+		CY_REG_BASE, sizeof(struct cyttsp_xydata), &ts->xy_data))
+		return 0;
+
+	/* touch extension handling */
+	if (ttsp_tch_ext(ts, &ts->xy_data))
+		return 0;
+
+	/* provide flow control handshake */
+	if (ts->platform_data->use_hndshk)
+		if (cyttsp_hndshk(ts, ts->xy_data.hst_mode))
+			return 0;
+
+	/* determine number of currently active touches */
+	num_cur_tch = GET_NUM_TOUCHES(ts->xy_data.tt_stat);
+
+	/* check for any error conditions */
+	if (ts->power_state == CY_IDLE_STATE)
+		return 0;
+	else if (GET_BOOTLOADERMODE(ts->xy_data.tt_mode)) {
+		return -1;
+	} else if (IS_LARGE_AREA(ts->xy_data.tt_stat) == 1) {
+		/* terminate all active tracks */
+		num_cur_tch = 0;
+		dev_dbg(ts->dev, "%s: Large area detected\n", __func__);
+	} else if (num_cur_tch > CY_MAX_TCH) {
+		/* terminate all active tracks */
+		num_cur_tch = 0;
+		dev_dbg(ts->dev, "%s: Num touch error detected\n", __func__);
+	} else if (IS_BAD_PKT(ts->xy_data.tt_mode)) {
+		/* terminate all active tracks */
+		num_cur_tch = 0;
+		dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__);
+	}
+
+	/* send touches */
+	if (!num_cur_tch)
+		/* terminate previous active touch */
+		input_mt_sync(ts->input);
+	else {
+		/* get touch 1 */
+		/*
+		 * If there is only one current active touch,
+		 * it will be reported in the touch 1 regardless
+		 * if it was reported in the touch 2 previously
+		 */
+		x[0] = (ts->xy_data.tch1_xhi << 8) + ts->xy_data.tch1_xlo;
+		y[0] = (ts->xy_data.tch1_yhi << 8) + ts->xy_data.tch1_ylo;
+		z[0] = ts->xy_data.tch1_z;
+		t[0] = true;
+
+		/* get touch 2 */
+		if (num_cur_tch == CY_MAX_TCH) {
+			x[1] = (ts->xy_data.tch2_xhi << 8) +
+				ts->xy_data.tch2_xlo;
+			y[1] = (ts->xy_data.tch2_yhi << 8) +
+				ts->xy_data.tch2_ylo;
+			z[1] = ts->xy_data.tch2_z;
+			t[1] = true;
+		}
+
+		for (i = 0; i < CY_MAX_TCH; i++) {
+			if (t[i]) {
+				input_report_abs(ts->input,
+					ABS_MT_POSITION_X, x[i]);
+				input_report_abs(ts->input,
+					ABS_MT_POSITION_Y, y[i]);
+				input_report_abs(ts->input,
+					ABS_MT_TOUCH_MAJOR, z[i]);
+				input_mt_sync(ts->input);
+			}
+		}
+	}
+
+	input_sync(ts->input);
+
+	return 0;
+}
+
+static void cyttsp_pr_state(struct cyttsp *ts)
+{
+	static char *cyttsp_powerstate_string[] = {
+		"IDLE",
+		"ACTIVE",
+		"LOW_PWR",
+		"SLEEP",
+		"BOOTLOADER",
+		"INVALID"
+	};
+
+	dev_info(ts->dev, "%s: %s\n", __func__,
+		ts->power_state < CY_INVALID_STATE ?
+		cyttsp_powerstate_string[ts->power_state] :
+		"INVALID");
+}
+
+static irqreturn_t cyttsp_irq(int irq, void *handle)
+{
+	struct cyttsp *ts = handle;
+	int retval;
+
+	if (ts->power_state == CY_BL_STATE)
+		complete(&ts->bl_ready);
+	else {
+		/* process the touches */
+		retval = cyttsp_xy_worker(ts);
+
+		if (retval < 0) {
+			/*
+			 * TTSP device has reset back to bootloader mode.
+			 * Restore to operational mode.
+			 */
+			retval = cyttsp_exit_bl_mode(ts);
+			if (retval)
+				ts->power_state = CY_IDLE_STATE;
+			else
+				ts->power_state = CY_ACTIVE_STATE;
+			cyttsp_pr_state(ts);
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+static int cyttsp_power_on(struct cyttsp *ts)
+{
+	int retval = 0;
+
+	if (!ts)
+		return -ENOMEM;
+
+	ts->power_state = CY_BL_STATE;
+
+	/* enable interrupts */
+	retval = request_threaded_irq(ts->irq, NULL, cyttsp_irq,
+		IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+		ts->platform_data->name, ts);
+	if (retval < 0)
+		goto bypass;
+
+	retval = cyttsp_soft_reset(ts);
+	if (retval < 0)
+		goto bypass;
+
+	retval = cyttsp_bl_app_valid(ts);
+	if (retval < 0)
+		goto bypass;
+	else if (retval > 0)
+		goto no_bl_bypass;
+
+	retval = cyttsp_exit_bl_mode(ts);
+
+	if (retval < 0)
+		goto bypass;
+
+	ts->power_state = CY_IDLE_STATE;
+
+no_bl_bypass:
+	retval = cyttsp_set_sysinfo_mode(ts);
+	if (retval < 0)
+		goto bypass;
+
+	retval = cyttsp_set_sysinfo_regs(ts);
+	if (retval < 0)
+		goto bypass;
+
+	retval = cyttsp_set_operational_mode(ts);
+	if (retval < 0)
+		goto bypass;
+
+	/* init active distance */
+	retval = cyttsp_act_dist_setup(ts);
+	if (retval < 0)
+		goto bypass;
+
+	ts->power_state = CY_ACTIVE_STATE;
+	retval = 0;
+
+bypass:
+	cyttsp_pr_state(ts);
+	return retval;
+}
+
+#ifdef CONFIG_PM
+int cyttsp_resume(void *handle)
+{
+	struct cyttsp *ts = handle;
+	int retval = 0;
+	struct cyttsp_xydata xydata;
+
+	if (ts->platform_data->use_sleep && (ts->power_state !=
+		CY_ACTIVE_STATE)) {
+		if (ts->platform_data->wakeup) {
+			retval = ts->platform_data->wakeup();
+			if (retval < 0)
+				dev_dbg(ts->dev, "%s: Error, wakeup failed!\n",
+					__func__);
+		} else {
+			dev_dbg(ts->dev, "%s: Error, wakeup not implemented "
+				"(check board file).\n", __func__);
+			retval = -ENOSYS;
+		}
+		if (!(retval < 0)) {
+			retval = ttsp_read_block_data(ts, CY_REG_BASE,
+				sizeof(xydata), &xydata);
+			if (!(retval < 0) && !GET_HSTMODE(xydata.hst_mode))
+				ts->power_state = CY_ACTIVE_STATE;
+		}
+	}
+	dev_dbg(ts->dev, "%s: Wake Up %s\n", __func__,
+		(retval < 0) ? "FAIL" : "PASS");
+	return retval;
+}
+EXPORT_SYMBOL_GPL(cyttsp_resume);
+
+int cyttsp_suspend(void *handle)
+{
+	struct cyttsp *ts = handle;
+	u8 sleep_mode = 0;
+	int retval = 0;
+
+	if (ts->platform_data->use_sleep &&
+		(ts->power_state == CY_ACTIVE_STATE)) {
+		sleep_mode = CY_DEEP_SLEEP_MODE;
+		retval = ttsp_write_block_data(ts,
+			CY_REG_BASE, sizeof(sleep_mode), &sleep_mode);
+		if (!(retval < 0))
+			ts->power_state = CY_SLEEP_STATE;
+	}
+	dev_dbg(ts->dev, "%s: Sleep Power state is %s\n", __func__,
+		(ts->power_state == CY_ACTIVE_STATE) ?
+		"ACTIVE" :
+		((ts->power_state == CY_SLEEP_STATE) ?
+		"SLEEP" : "LOW POWER"));
+	return retval;
+}
+EXPORT_SYMBOL_GPL(cyttsp_suspend);
+#endif
+
+static int cyttsp_open(struct input_dev *dev)
+{
+	struct cyttsp *ts = input_get_drvdata(dev);
+
+	return cyttsp_power_on(ts);
+}
+
+void cyttsp_core_release(void *handle)
+{
+	struct cyttsp *ts = handle;
+
+	if (ts) {
+		free_irq(ts->irq, ts);
+		input_unregister_device(ts->input);
+		if (ts->platform_data->exit)
+			ts->platform_data->exit();
+		kfree(ts);
+	}
+}
+EXPORT_SYMBOL_GPL(cyttsp_core_release);
+
+static void cyttsp_close(struct input_dev *dev)
+{
+	struct cyttsp *ts = input_get_drvdata(dev);
+
+	free_irq(ts->irq, ts);
+}
+
+void *cyttsp_core_init(struct cyttsp_bus_ops *bus_ops, struct device *dev)
+{
+	struct input_dev *input_device;
+
+	struct cyttsp *ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+
+	if (!ts) {
+		pr_err("%s: Error, kzalloc\n", __func__);
+		goto error_alloc_data;
+	}
+
+	if (dev == NULL || bus_ops == NULL) {
+		kfree(ts);
+		goto error_alloc_data;
+	}
+
+	ts->dev = dev;
+	ts->platform_data = dev->platform_data;
+	ts->bus_ops = bus_ops;
+	init_completion(&ts->bl_ready);
+
+	if (ts->platform_data->init) {
+		if (ts->platform_data->init()) {
+			dev_dbg(ts->dev, "%s: Error, platform init failed!\n",
+				__func__);
+			goto error_init;
+		}
+	}
+
+	ts->irq = gpio_to_irq(ts->platform_data->irq_gpio);
+	if (ts->irq <= 0) {
+		dev_dbg(ts->dev, "%s: Error, failed to allocate irq\n",
+			__func__);
+			goto error_init;
+	}
+
+	/* Create the input device and register it. */
+	input_device = input_allocate_device();
+	if (!input_device) {
+		dev_dbg(ts->dev, "%s: Error, failed to allocate input device\n",
+			__func__);
+		goto error_input_allocate_device;
+	}
+
+	ts->input = input_device;
+	input_device->name = ts->platform_data->name;
+	snprintf(ts->phys, sizeof(ts->phys), "%s", dev_name(dev));
+	input_device->phys = ts->phys;
+	input_device->dev.parent = ts->dev;
+	ts->bus_type = bus_ops->dev->bus;
+	input_device->open = cyttsp_open;
+	input_device->close = cyttsp_close;
+	input_set_drvdata(input_device, ts);
+
+	__set_bit(EV_SYN, input_device->evbit);
+	__set_bit(EV_KEY, input_device->evbit);
+	__set_bit(EV_ABS, input_device->evbit);
+
+	input_set_abs_params(input_device, ABS_MT_POSITION_X,
+		0, ts->platform_data->maxx, 0, 0);
+	input_set_abs_params(input_device, ABS_MT_POSITION_Y,
+		0, ts->platform_data->maxy, 0, 0);
+	input_set_abs_params(input_device, ABS_MT_TOUCH_MAJOR,
+		0, CY_MAXZ, 0, 0);
+
+	if (input_register_device(input_device)) {
+		dev_dbg(ts->dev, "%s: Error, failed to register input device\n",
+			__func__);
+		goto error_input_register_device;
+	}
+
+	goto no_error;
+
+error_input_register_device:
+	input_unregister_device(input_device);
+error_input_allocate_device:
+	if (ts->platform_data->exit)
+		ts->platform_data->exit();
+error_init:
+	kfree(ts);
+error_alloc_data:
+no_error:
+	return ts;
+}
+EXPORT_SYMBOL_GPL(cyttsp_core_init);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
+MODULE_AUTHOR("Cypress");
+
diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h
new file mode 100644
index 0000000..78001b5
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_core.h
@@ -0,0 +1,55 @@
+/*
+ * Header file for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
+ * For use with Cypress Txx3xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <kev@...ress.com>
+ *
+ */
+
+
+#ifndef __CYTTSP_CORE_H__
+#define __CYTTSP_CORE_H__
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/input/cyttsp.h>
+
+#define CY_NUM_RETRY                4 /* max number of retries for read ops */
+
+
+struct cyttsp_bus_ops {
+	s32 (*write)(void *handle, u8 addr, u8 length, const void *values);
+	s32 (*read)(void *handle, u8 addr, u8 length, void *values);
+	s32 (*ext)(void *handle, void *values);
+	struct device *dev;
+};
+
+void *cyttsp_core_init(struct cyttsp_bus_ops *bus_ops, struct device *dev);
+
+void cyttsp_core_release(void *handle);
+#ifdef CONFIG_PM
+int cyttsp_resume(void *handle);
+int cyttsp_suspend(void *handle);
+#endif
+
+#endif /* __CYTTSP_CORE_H__ */
diff --git a/include/linux/input/cyttsp.h b/include/linux/input/cyttsp.h
new file mode 100644
index 0000000..3907bfc
--- /dev/null
+++ b/include/linux/input/cyttsp.h
@@ -0,0 +1,68 @@
+/*
+ * Header file for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
+ * For use with Cypress Txx3xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com (kev@...ress.com)
+ *
+ */
+#ifndef _CYTTSP_H_
+#define _CYTTSP_H_
+
+#define CY_SPI_NAME "cyttsp-spi"
+#define CY_I2C_NAME "cyttsp-i2c"
+/* Active Power state scanning/processing refresh interval */
+#define CY_ACT_INTRVL_DFLT 0x00 /* ms */
+/* touch timeout for the Active power */
+#define CY_TCH_TMOUT_DFLT 0xFF /* ms */
+/* Low Power state scanning/processing refresh interval */
+#define CY_LP_INTRVL_DFLT 0x0A /* ms */
+/* Active distance in pixels for a gesture to be reported */
+#define CY_ACT_DIST_DFLT 0xF8 /* pixels */
+
+enum cyttsp_powerstate {
+	CY_IDLE_STATE,
+	CY_ACTIVE_STATE,
+	CY_LOW_PWR_STATE,
+	CY_SLEEP_STATE,
+	CY_BL_STATE,
+	CY_INVALID_STATE	/* always last in the list */
+};
+
+struct cyttsp_platform_data {
+	u32 maxx;
+	u32 maxy;
+	bool use_hndshk;
+	bool use_sleep;
+	u8 act_dist;	/* Active distance */
+	u8 act_intrvl;  /* Active refresh interval; ms */
+	u8 tch_tmout;   /* Active touch timeout; ms */
+	u8 lp_intrvl;   /* Low power refresh interval; ms */
+	int (*wakeup)(void);
+	int (*init)(void);
+	void (*exit)(void);
+	char *name;
+	s16 irq_gpio;
+	u8 *bl_keys;
+};
+
+#endif /* _CYTTSP_H_ */
-- 
1.7.2.1


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