[PATCH] touchscreen: Cypress TTSP G3 MTDEV Core Driver

[Kevin McNeely]

Initial release of 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@xxxxxxxxxxx>
---
 drivers/input/touchscreen/Kconfig       |    8 +
 drivers/input/touchscreen/Makefile      |    1 +
 drivers/input/touchscreen/cyttsp_core.c |  885 +++++++++++++++++++++++++++++++
 drivers/input/touchscreen/cyttsp_core.h |   55 ++
 include/linux/input/cyttsp.h            |   78 +++
 5 files changed, 1027 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..ee5a31b 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -124,6 +124,14 @@ config TOUCHSCREEN_CY8CTMG110
 	  To compile this driver as a module, choose M here: the
 	  module will be called cy8ctmg110_ts.
 
+config TOUCHSCREEN_CYTTSP_CORE
+	bool "Cypress TTSP touchscreen core"
+	help
+	  Say Y here if you have a Cypress TTSP touchscreen
+	  connected to your system.
+
+	  If unsure, say N.
+
 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..f629af9 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..99fd316
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -0,0 +1,885 @@
+/* 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 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@xxxxxxxxxxx>
+ *
+ */
+
+#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 File 0 offset */
+#define CY_BL_FILE0       0x00
+/* Bootloader command directive */
+#define CY_BL_CMD         0xFF
+/* Bootloader Exit and Verify Checksum command */
+#define CY_BL_EXIT        0xA5
+/* Bootloader number of command keys */
+#define CY_NUM_BL_KEYS    8
+/* Bootloader default command keys */
+#define CY_BL_KEY0 0
+#define CY_BL_KEY1 1
+#define CY_BL_KEY2 2
+#define CY_BL_KEY3 3
+#define CY_BL_KEY4 4
+#define CY_BL_KEY5 5
+#define CY_BL_KEY6 6
+#define CY_BL_KEY7 7
+
+/* 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)
+
+/* maximum number of concurrent tracks */
+#define CY_NUM_TCH_ID               4
+/* maximum number of track IDs */
+#define CY_NUM_TRK_ID               16
+
+#define CY_NTCH                     0 /* lift off */
+#define CY_TCH                      1 /* touch down */
+#define CY_SMALL_TOOL_WIDTH         10
+#define CY_LARGE_TOOL_WIDTH         255
+#define CY_REG_BASE                 0x00
+#define CY_REG_GEST_SET             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_SYSINFO            20 /* ms */
+#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
+
+/* Touch structure */
+struct cyttsp_touch {
+	u16 x __attribute__ ((packed));
+	u16 y __attribute__ ((packed));
+	u8 z;
+};
+
+/* TrueTouch Standard Product Gen3 interface definition */
+struct cyttsp_xydata {
+	u8 hst_mode;
+	u8 tt_mode;
+	u8 tt_stat;
+	struct cyttsp_touch tch1;
+	u8 touch12_id;
+	struct cyttsp_touch tch2;
+	u8 gest_cnt;
+	u8 gest_id;
+	struct cyttsp_touch tch3;
+	u8 touch34_id;
+	struct cyttsp_touch tch4;
+	u8 tt_undef[3];
+	u8 gest_set;
+	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_tch {
+	struct cyttsp_touch *tch;
+	u8 *id;
+};
+
+struct cyttsp_trk {
+	u8 tch;
+	u8 w;
+	u16 x;
+	u16 y;
+	u8 z;
+};
+
+struct cyttsp {
+	struct device *dev;
+	int irq;
+	struct input_dev *input;
+	struct mutex mutex;
+	char phys[32];
+	struct bus_type *bus_type;
+	struct cyttsp_platform_data *platform_data;
+	struct cyttsp_xydata xy_data;
+	struct cyttsp_bootloader_data bl_data;
+	struct cyttsp_sysinfo_data sysinfo_data;
+	struct cyttsp_trk prv_trk[CY_NUM_TRK_ID];
+	struct cyttsp_tch tch_map[CY_NUM_TCH_ID];
+	struct cyttsp_bus_ops *bus_ops;
+	struct timer_list to_timer;
+	bool bl_ready;
+};
+
+struct cyttsp_track_data {
+	struct cyttsp_trk cur_trk[CY_NUM_TRK_ID];
+};
+
+static const u8 bl_command[] = {
+	CY_BL_FILE0, CY_BL_CMD, CY_BL_EXIT,
+	CY_BL_KEY0, CY_BL_KEY1, CY_BL_KEY2,
+	CY_BL_KEY3, CY_BL_KEY4, CY_BL_KEY5,
+	CY_BL_KEY6, CY_BL_KEY7
+};
+
+static int ttsp_read_block_data(struct cyttsp *ts, u8 command,
+	u8 length, void *buf)
+{
+	int retval;
+	int tries;
+
+	if (!buf || !length)
+		return -EIO;
+
+	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 -EIO;
+
+	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 irqreturn_t cyttsp_bl_ready_irq(int irq, void *handle)
+{
+	struct cyttsp *ts = handle;
+
+	ts->bl_ready = true;
+	return IRQ_HANDLED;
+}
+
+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 bool cyttsp_wait_bl_ready(struct cyttsp *ts, int loop_delay, int max_try)
+{
+	int tries = 0;
+
+	ts->bl_ready = false;	/* wait for interrupt to set ready flag */
+
+	while (!ts->bl_ready && (tries++ < max_try))
+		msleep(loop_delay);
+
+	if (tries < max_try)
+		return true;
+	else
+		return false;
+}
+
+static int cyttsp_exit_bl_mode(struct cyttsp *ts)
+{
+	int retval;
+	int tries = 0;
+	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;
+
+	do {
+		msleep(500);
+		retval = cyttsp_load_bl_regs(ts);
+	} while (GET_BOOTLOADERMODE(ts->bl_data.bl_status) &&
+		tries++ < 10 &&
+		!(retval < 0));
+
+	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;
+	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 */
+	msleep(500);
+
+	return retval;
+}
+
+static int cyttsp_set_sysinfo_mode(struct cyttsp *ts)
+{
+	int retval;
+	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;
+
+	msleep(500);
+
+	/* read sysinfo registers */
+	retval = ttsp_read_block_data(ts, CY_REG_BASE,
+		sizeof(ts->sysinfo_data), &(ts->sysinfo_data));
+
+	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_SYSINFO);
+	}
+
+	return retval;
+}
+
+static int cyttsp_soft_reset(struct cyttsp *ts)
+{
+	int retval;
+	u8 cmd = CY_SOFT_RESET_MODE;
+
+	/* enable bootloader interrupts */
+	retval = request_irq(ts->irq, cyttsp_bl_ready_irq,
+		IRQF_TRIGGER_FALLING, ts->platform_data->name, ts);
+	if (retval)
+		return retval;
+
+	retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (!retval) {
+		if (!cyttsp_wait_bl_ready(ts, 20, 100))
+			retval = -ENODEV;
+		else
+			retval = 0;
+	}
+
+	free_irq(ts->irq, ts);
+	return retval;
+}
+
+static int cyttsp_gesture_setup(struct cyttsp *ts)
+{
+	int retval;
+	u8 gesture_setup;
+
+	/* Init gesture; active distance setup */
+	gesture_setup = ts->platform_data->gest_set;
+	retval = ttsp_write_block_data(ts, CY_REG_GEST_SET,
+		sizeof(gesture_setup), &gesture_setup);
+
+	return retval;
+}
+
+static void cyttsp_init_tch_map(struct cyttsp *ts)
+{
+	ts->tch_map[0].tch = &ts->xy_data.tch1;
+	ts->tch_map[0].id = &ts->xy_data.touch12_id;
+	ts->tch_map[1].tch = &ts->xy_data.tch2;
+	ts->tch_map[1].id = &ts->xy_data.touch12_id;
+	ts->tch_map[2].tch = &ts->xy_data.tch3;
+	ts->tch_map[2].id = &ts->xy_data.touch34_id;
+	ts->tch_map[3].tch = &ts->xy_data.tch4;
+	ts->tch_map[3].id = &ts->xy_data.touch34_id;
+}
+
+static void cyttsp_init_prv_trks(struct cyttsp *ts)
+{
+	/* init the touch structures */
+	memset(ts->prv_trk, CY_NTCH, sizeof(ts->prv_trk));
+}
+
+static void cyttsp_init_cur_trks(struct cyttsp_track_data *t)
+{
+	memset(t->cur_trk, CY_NTCH, sizeof(t->cur_trk));
+}
+
+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;
+}
+
+static void handle_multi_touch(struct cyttsp_track_data *t, struct cyttsp *ts)
+{
+	u8 id;
+	u8 cnt = 0;
+
+	/* terminate any previous touch where the track
+	 * is missing from the current event
+	 */
+	for (id = 0; id < CY_NUM_TRK_ID; id++) {
+		if (t->cur_trk[id].tch) {
+			/* put active current track data */
+			input_report_abs(ts->input,
+				ABS_MT_TRACKING_ID, id);
+			input_report_abs(ts->input,
+				ABS_MT_WIDTH_MAJOR, t->cur_trk[id].w);
+			input_report_abs(ts->input,
+				ABS_MT_POSITION_X, t->cur_trk[id].x);
+			input_report_abs(ts->input,
+				ABS_MT_POSITION_Y, t->cur_trk[id].y);
+			input_report_abs(ts->input,
+				ABS_MT_TOUCH_MAJOR, t->cur_trk[id].z);
+			input_mt_sync(ts->input);
+
+			dev_dbg(ts->dev, "%s: MT1: X=%d Y=%d Z=%d\n",
+				__func__,
+				t->cur_trk[id].x,
+				t->cur_trk[id].y,
+				t->cur_trk[id].z);
+			/* save current track data into previous track data */
+			ts->prv_trk[id] = t->cur_trk[id];
+			cnt++;
+		} else if (ts->prv_trk[id].tch) {
+			/* put lift-off previous track data */
+			input_report_abs(ts->input,
+				ABS_MT_TRACKING_ID, id);
+			input_report_abs(ts->input,
+				ABS_MT_WIDTH_MAJOR, ts->prv_trk[id].w);
+			input_report_abs(ts->input,
+				ABS_MT_POSITION_X, ts->prv_trk[id].x);
+			input_report_abs(ts->input,
+				ABS_MT_POSITION_Y, ts->prv_trk[id].y);
+			input_report_abs(ts->input,
+				ABS_MT_TOUCH_MAJOR, CY_NTCH);
+			input_mt_sync(ts->input);
+
+			dev_dbg(ts->dev, "%s: MT1: X=%d Y=%d Z=%d lift-off\n",
+				__func__,
+				ts->prv_trk[id].x,
+				ts->prv_trk[id].y,
+				CY_NTCH);
+			ts->prv_trk[id].tch = CY_NTCH;
+			cnt++;
+		}
+	}
+
+	/* signal the view motion event */
+	if (cnt)
+		input_sync(ts->input);
+}
+
+static void cyttsp_get_xydata(struct cyttsp *ts,
+	struct cyttsp_track_data *t,
+	u8 id, u8 w, u16 x, u16 y, u8 z)
+{
+	struct cyttsp_trk *trk;
+
+	trk = &(t->cur_trk[id]);
+	trk->tch = CY_TCH;
+	trk->w = w;
+	trk->x = x;
+	trk->y = y;
+	trk->z = z;
+}
+
+static int cyttsp_xy_worker(struct cyttsp *ts)
+{
+	u8 cur_tch = 0;
+	u8 tch;
+	struct cyttsp_track_data trk;
+
+	/* get event 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;
+
+	cur_tch = GET_NUM_TOUCHES(ts->xy_data.tt_stat);
+
+	if (ts->bus_ops->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 */
+		cur_tch = CY_NTCH;
+		dev_dbg(ts->dev, "%s: Large area detected\n", __func__);
+	} else if (cur_tch > CY_NUM_TCH_ID) {
+		/* terminate all active tracks */
+		cur_tch = CY_NTCH;
+		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 */
+		cur_tch = CY_NTCH;
+		dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__);
+	}
+
+	/* process the touches */
+	cyttsp_init_cur_trks(&trk);
+
+	for (tch = 0; tch < cur_tch; tch++) {
+		cyttsp_get_xydata(ts, &trk,
+			tch & 0x01 ?
+			(*(ts->tch_map[tch].id) & 0x0F) :
+			(*(ts->tch_map[tch].id) & 0xF0) >> 4,
+			CY_SMALL_TOOL_WIDTH,
+			be16_to_cpu((ts->tch_map[tch].tch)->x),
+			be16_to_cpu((ts->tch_map[tch].tch)->y),
+			(ts->tch_map[tch].tch)->z);
+	}
+
+	handle_multi_touch(&trk, ts);
+
+	return 0;
+}
+
+static irqreturn_t cyttsp_irq(int irq, void *handle)
+{
+	struct cyttsp *ts = handle;
+	int retval;
+
+	retval = cyttsp_xy_worker(ts);
+
+	if (retval < 0) {
+		/* TTSP device has reset back to bootloader mode
+		 * Reset driver touch history and restore operational mode
+		 */
+		cyttsp_init_prv_trks(ts);
+		retval = cyttsp_exit_bl_mode(ts);
+		if (retval)
+			ts->bus_ops->power_state = CY_IDLE_STATE;
+		dev_info(ts->dev, "%s: %s\n",
+			__func__,
+			(ts->bus_ops->power_state == CY_ACTIVE_STATE) ?
+			"ACTIVE" : "IDLE");
+	}
+	return IRQ_HANDLED;
+}
+
+static int cyttsp_power_on(struct cyttsp *ts)
+{
+	int retval = 0;
+
+	ts->bus_ops->power_state = CY_IDLE_STATE;
+
+	retval = cyttsp_bl_app_valid(ts);
+	if (retval < 0)
+		goto bypass;
+	else if (retval > 0) {
+		retval = cyttsp_soft_reset(ts);
+		if (retval < 0)
+			goto bypass;
+	}
+
+	retval = cyttsp_exit_bl_mode(ts);
+	if (retval < 0)
+		goto 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;
+
+	/* enable touch 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;
+
+	/* init gesture setup; required for active distance */
+	retval = cyttsp_gesture_setup(ts);
+
+bypass:
+	if (!retval)
+		ts->bus_ops->power_state = CY_ACTIVE_STATE;
+
+	dev_info(ts->dev, "%s: %s\n",
+		__func__,
+		(ts->bus_ops->power_state == CY_ACTIVE_STATE) ?
+		"ACTIVE" : "IDLE");
+	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->bus_ops->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->bus_ops->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->bus_ops->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->bus_ops->power_state = CY_SLEEP_STATE;
+	}
+	dev_dbg(ts->dev, "%s: Sleep Power state is %s\n", __func__,
+		(ts->bus_ops->power_state == CY_ACTIVE_STATE) ?
+		"ACTIVE" :
+		((ts->bus_ops->power_state == CY_SLEEP_STATE) ?
+		"SLEEP" : "LOW POWER"));
+	return retval;
+}
+EXPORT_SYMBOL_GPL(cyttsp_suspend);
+#endif
+
+int cyttsp_core_init(struct cyttsp_bus_ops *bus_ops,
+	struct device *dev, void *handle)
+{
+	struct input_dev *input_device;
+	struct cyttsp *ts;
+	int retval = 0;
+
+	if ((dev == NULL) || (bus_ops == NULL))
+		goto error_alloc_data;
+
+	ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+	if (ts == NULL) {
+		dev_dbg(ts->dev, "%s: Error, kzalloc\n", __func__);
+		retval = -ENOMEM;
+		goto error_alloc_data;
+	}
+	mutex_init(&ts->mutex);
+	ts->dev = dev;
+	ts->platform_data = dev->platform_data;
+	ts->bus_ops = bus_ops;
+	ts->platform_data->dev = ts->dev;
+
+	if (ts->platform_data->init) {
+		retval = ts->platform_data->init(ts->platform_data, 1);
+		if (retval) {
+			dev_dbg(ts->dev, "%s: Error, platform init failed!\n",
+				__func__);
+			retval = -EIO;
+			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__);
+			retval = -EIO;
+			goto error_init;
+	}
+
+	/* Create the input device and register it. */
+	input_device = input_allocate_device();
+	if (!input_device) {
+		retval = -ENOMEM;
+		dev_dbg(ts->dev, "%s: Error, failed to allocate input device\n",
+			__func__);
+			retval = -ENODEV;
+		goto error_input_allocate_device;
+	}
+
+	ts->input = input_device;
+	input_device->name = ts->platform_data->name;
+	input_device->phys = ts->phys;
+	input_device->dev.parent = ts->dev;
+	ts->bus_type = bus_ops->dev->bus;
+
+	cyttsp_init_tch_map(ts);
+	cyttsp_init_prv_trks(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);
+	input_set_abs_params(input_device, ABS_MT_WIDTH_MAJOR,
+		0, CY_LARGE_TOOL_WIDTH, 0, 0);
+	input_set_abs_params(input_device, ABS_MT_TRACKING_ID,
+		0, CY_NUM_TRK_ID, 0, 0);
+
+	retval = input_register_device(input_device);
+	if (retval) {
+		dev_dbg(ts->dev, "%s: Error, failed to register input device\n",
+			__func__);
+			retval = -ENODEV;
+		goto error_input_register_device;
+	}
+
+	retval = cyttsp_power_on(ts);
+
+	if (retval < 0) {
+		dev_dbg(ts->dev, "%s: Error, power on failed!\n", __func__);
+		retval = -ENODEV;
+		goto error_power_on;
+	}
+
+	handle = ts;
+	goto no_error;
+
+error_power_on:
+	free_irq(ts->irq, ts);
+error_input_register_device:
+	input_unregister_device(input_device);
+error_input_allocate_device:
+	if (ts->platform_data->init)
+		ts->platform_data->init(ts->platform_data, 0);
+error_init:
+	mutex_destroy(&ts->mutex);
+	kfree(ts);
+error_alloc_data:
+	handle = NULL;
+no_error:
+	return retval;
+}
+EXPORT_SYMBOL_GPL(cyttsp_core_init);
+
+/* registered in driver struct */
+void cyttsp_core_release(void *handle)
+{
+	struct cyttsp *ts = handle;
+
+	mutex_destroy(&ts->mutex);
+	free_irq(ts->irq, ts);
+	input_unregister_device(ts->input);
+	if (ts->platform_data->init)
+		ts->platform_data->init(ts->platform_data, 0);
+	kfree(ts);
+}
+EXPORT_SYMBOL_GPL(cyttsp_core_release);
+
+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..43fe438
--- /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 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@xxxxxxxxxxx>
+ *
+ */
+
+
+#ifndef __CYTTSP_CORE_H__
+#define __CYTTSP_CORE_H__
+
+#include <linux/kernel.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;
+	enum cyttsp_powerstate power_state;
+};
+
+int cyttsp_core_init(struct cyttsp_bus_ops *bus_ops,
+	struct device *dev, void *handle);
+
+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..5280252
--- /dev/null
+++ b/include/linux/input/cyttsp.h
@@ -0,0 +1,78 @@
+/* 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 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@xxxxxxxxxxx)
+ *
+ */
+#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
+/* touch timeout for the Active power */
+#define CY_TCH_TMOUT_DFLT 0xFF
+/* Low Power state scanning/processing refresh interval */
+#define CY_LP_INTRVL_DFLT 0x0A
+/*
+ * Active distance in pixels for a gesture to be reported
+ * if set to 0, then all gesture movements are reported
+ * Valid range is 0 - 15
+ */
+#define CY_ACT_DIST_DFLT 8
+#define CY_ACT_DIST CY_ACT_DIST_DFLT
+
+enum cyttsp_gest {
+	CY_GEST_GRP_NONE = 0,
+	CY_GEST_GRP1 =	0x10,
+	CY_GEST_GRP2 = 0x20,
+	CY_GEST_GRP3 = 0x40,
+	CY_GEST_GRP4 = 0x80,
+};
+
+enum cyttsp_powerstate {
+	CY_IDLE_STATE,
+	CY_ACTIVE_STATE,
+	CY_LOW_PWR_STATE,
+	CY_SLEEP_STATE,
+};
+
+struct cyttsp_platform_data {
+	struct device *dev;
+	u32 maxx;
+	u32 maxy;
+	unsigned use_hndshk:1;
+	unsigned use_sleep:1;
+	u8 gest_set;	/* 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)(struct cyttsp_platform_data *, int on_off);
+	char *name;
+	s16 irq_gpio;
+	u8 *bl_keys;
+};
+
+#endif /* _CYTTSP_H_ */
-- 
1.7.2.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/