Input: cyttsp4 - add core driver for Cypress TMA4XX touchscreen devices

Cypress TrueTouch(tm) Standard Product controllers,
Generetion4 devices, Core driver.

Core driver is interface between host and TTSP controller and processes
data sent by controller.

Responsibilities of module are IRQ handling, reading system information
registers and sending multi-touch protocol type B events.

Signed-off-by: Ferruh Yigit <fery@cypress.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

4 files changed, 2654 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index f9a5fd89bc02..66df8df88140 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -167,6 +167,18 @@ config TOUCHSCREEN_CYTTSP_SPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called cyttsp_spi.
 
+config TOUCHSCREEN_CYTTSP4_CORE
+	tristate "Cypress TrueTouch Gen4 Touchscreen Driver"
+	help
+	  Core driver for Cypress TrueTouch(tm) Standard Product
+	  Generation4 touchscreen controllers.
+
+	  Say Y here if you have a Cypress Gen4 touchscreen.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here.
+
 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 2b378b12ee6b..f44500674c32 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE)	+= cyttsp_core.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o cyttsp_i2c_common.o
 obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)	+= cyttsp_spi.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_CORE)	+= cyttsp4_core.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
 obj-$(CONFIG_TOUCHSCREEN_DA9052)	+= da9052_tsi.o
 obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o
diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c
new file mode 100644
index 000000000000..963da052c15e
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_core.c
@@ -0,0 +1,2169 @@
+/*
+ * cyttsp4_core.c
+ * Cypress TrueTouch(TM) Standard Product V4 Core driver module.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2012 Cypress Semiconductor
+ *
+ * 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.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ *
+ */
+
+#include "cyttsp4_core.h"
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+/* Timeout in ms. */
+#define CY_CORE_REQUEST_EXCLUSIVE_TIMEOUT	500
+#define CY_CORE_SLEEP_REQUEST_EXCLUSIVE_TIMEOUT	5000
+#define CY_CORE_MODE_CHANGE_TIMEOUT		1000
+#define CY_CORE_RESET_AND_WAIT_TIMEOUT		500
+#define CY_CORE_WAKEUP_TIMEOUT			500
+
+#define CY_CORE_STARTUP_RETRY_COUNT		3
+
+static const u8 ldr_exit[] = {
+	0xFF, 0x01, 0x3B, 0x00, 0x00, 0x4F, 0x6D, 0x17
+};
+
+static const u8 ldr_err_app[] = {
+	0x01, 0x02, 0x00, 0x00, 0x55, 0xDD, 0x17
+};
+
+static inline size_t merge_bytes(u8 high, u8 low)
+{
+	return (high << 8) + low;
+}
+
+#ifdef VERBOSE_DEBUG
+static void cyttsp4_pr_buf(struct device *dev, u8 *pr_buf, u8 *dptr, int size,
+		const char *data_name)
+{
+	int i, k;
+	const char fmt[] = "%02X ";
+	int max;
+
+	if (!size)
+		return;
+
+	max = (CY_MAX_PRBUF_SIZE - 1) - sizeof(CY_PR_TRUNCATED);
+
+	pr_buf[0] = 0;
+	for (i = k = 0; i < size && k < max; i++, k += 3)
+		scnprintf(pr_buf + k, CY_MAX_PRBUF_SIZE, fmt, dptr[i]);
+
+	dev_vdbg(dev, "%s:  %s[0..%d]=%s%s\n", __func__, data_name, size - 1,
+			pr_buf, size <= max ? "" : CY_PR_TRUNCATED);
+}
+#else
+#define cyttsp4_pr_buf(dev, pr_buf, dptr, size, data_name) do { } while (0)
+#endif
+
+static int cyttsp4_load_status_regs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	struct device *dev = cd->dev;
+	int rc;
+
+	rc = cyttsp4_adap_read(cd, CY_REG_BASE, si->si_ofs.mode_size,
+			si->xy_mode);
+	if (rc < 0)
+		dev_err(dev, "%s: fail read mode regs r=%d\n",
+			__func__, rc);
+	else
+		cyttsp4_pr_buf(dev, cd->pr_buf, si->xy_mode,
+			si->si_ofs.mode_size, "xy_mode");
+
+	return rc;
+}
+
+static int cyttsp4_handshake(struct cyttsp4 *cd, u8 mode)
+{
+	u8 cmd = mode ^ CY_HST_TOGGLE;
+	int rc;
+
+	/*
+	 * Mode change issued, handshaking now will cause endless mode change
+	 * requests, for sync mode modechange will do same with handshake
+	 * */
+	if (mode & CY_HST_MODE_CHANGE)
+		return 0;
+
+	rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: bus write fail on handshake (ret=%d)\n",
+				__func__, rc);
+
+	return rc;
+}
+
+static int cyttsp4_hw_soft_reset(struct cyttsp4 *cd)
+{
+	u8 cmd = CY_HST_RESET;
+	int rc = cyttsp4_adap_write(cd, CY_REG_BASE, sizeof(cmd), &cmd);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: FAILED to execute SOFT reset\n",
+				__func__);
+		return rc;
+	}
+	return 0;
+}
+
+static int cyttsp4_hw_hard_reset(struct cyttsp4 *cd)
+{
+	if (cd->cpdata->xres) {
+		cd->cpdata->xres(cd->cpdata, cd->dev);
+		dev_dbg(cd->dev, "%s: execute HARD reset\n", __func__);
+		return 0;
+	}
+	dev_err(cd->dev, "%s: FAILED to execute HARD reset\n", __func__);
+	return -ENOSYS;
+}
+
+static int cyttsp4_hw_reset(struct cyttsp4 *cd)
+{
+	int rc = cyttsp4_hw_hard_reset(cd);
+	if (rc == -ENOSYS)
+		rc = cyttsp4_hw_soft_reset(cd);
+	return rc;
+}
+
+/*
+ * Gets number of bits for a touch filed as parameter,
+ * sets maximum value for field which is used as bit mask
+ * and returns number of bytes required for that field
+ */
+static int cyttsp4_bits_2_bytes(unsigned int nbits, size_t *max)
+{
+	*max = 1 << nbits;
+	return (nbits + 7) / 8;
+}
+
+static int cyttsp4_si_data_offsets(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int rc = cyttsp4_adap_read(cd, CY_REG_BASE, sizeof(si->si_data),
+			&si->si_data);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read sysinfo data offsets r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	/* Print sysinfo data offsets */
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)&si->si_data,
+		       sizeof(si->si_data), "sysinfo_data_offsets");
+
+	/* convert sysinfo data offset bytes into integers */
+
+	si->si_ofs.map_sz = merge_bytes(si->si_data.map_szh,
+			si->si_data.map_szl);
+	si->si_ofs.map_sz = merge_bytes(si->si_data.map_szh,
+			si->si_data.map_szl);
+	si->si_ofs.cydata_ofs = merge_bytes(si->si_data.cydata_ofsh,
+			si->si_data.cydata_ofsl);
+	si->si_ofs.test_ofs = merge_bytes(si->si_data.test_ofsh,
+			si->si_data.test_ofsl);
+	si->si_ofs.pcfg_ofs = merge_bytes(si->si_data.pcfg_ofsh,
+			si->si_data.pcfg_ofsl);
+	si->si_ofs.opcfg_ofs = merge_bytes(si->si_data.opcfg_ofsh,
+			si->si_data.opcfg_ofsl);
+	si->si_ofs.ddata_ofs = merge_bytes(si->si_data.ddata_ofsh,
+			si->si_data.ddata_ofsl);
+	si->si_ofs.mdata_ofs = merge_bytes(si->si_data.mdata_ofsh,
+			si->si_data.mdata_ofsl);
+	return rc;
+}
+
+static int cyttsp4_si_get_cydata(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int read_offset;
+	int mfgid_sz, calc_mfgid_sz;
+	void *p;
+	int rc;
+
+	si->si_ofs.cydata_size = si->si_ofs.test_ofs - si->si_ofs.cydata_ofs;
+	dev_dbg(cd->dev, "%s: cydata size: %Zd\n", __func__,
+			si->si_ofs.cydata_size);
+
+	p = krealloc(si->si_ptrs.cydata, si->si_ofs.cydata_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc cydata memory\n", __func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.cydata = p;
+
+	read_offset = si->si_ofs.cydata_ofs;
+
+	/* Read the CYDA registers up to MFGID field */
+	rc = cyttsp4_adap_read(cd, read_offset,
+			offsetof(struct cyttsp4_cydata, mfgid_sz)
+				+ sizeof(si->si_ptrs.cydata->mfgid_sz),
+			si->si_ptrs.cydata);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read cydata r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	/* Check MFGID size */
+	mfgid_sz = si->si_ptrs.cydata->mfgid_sz;
+	calc_mfgid_sz = si->si_ofs.cydata_size - sizeof(struct cyttsp4_cydata);
+	if (mfgid_sz != calc_mfgid_sz) {
+		dev_err(cd->dev, "%s: mismatch in MFGID size, reported:%d calculated:%d\n",
+			__func__, mfgid_sz, calc_mfgid_sz);
+		return -EINVAL;
+	}
+
+	read_offset += offsetof(struct cyttsp4_cydata, mfgid_sz)
+			+ sizeof(si->si_ptrs.cydata->mfgid_sz);
+
+	/* Read the CYDA registers for MFGID field */
+	rc = cyttsp4_adap_read(cd, read_offset, si->si_ptrs.cydata->mfgid_sz,
+			si->si_ptrs.cydata->mfg_id);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read cydata r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	read_offset += si->si_ptrs.cydata->mfgid_sz;
+
+	/* Read the rest of the CYDA registers */
+	rc = cyttsp4_adap_read(cd, read_offset,
+			sizeof(struct cyttsp4_cydata)
+				- offsetof(struct cyttsp4_cydata, cyito_idh),
+			&si->si_ptrs.cydata->cyito_idh);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read cydata r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)si->si_ptrs.cydata,
+		si->si_ofs.cydata_size, "sysinfo_cydata");
+	return rc;
+}
+
+static int cyttsp4_si_get_test_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	si->si_ofs.test_size = si->si_ofs.pcfg_ofs - si->si_ofs.test_ofs;
+
+	p = krealloc(si->si_ptrs.test, si->si_ofs.test_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc test memory\n", __func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.test = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.test_ofs, si->si_ofs.test_size,
+			si->si_ptrs.test);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read test data r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+		       (u8 *)si->si_ptrs.test, si->si_ofs.test_size,
+		       "sysinfo_test_data");
+	if (si->si_ptrs.test->post_codel &
+	    CY_POST_CODEL_WDG_RST)
+		dev_info(cd->dev, "%s: %s codel=%02X\n",
+			 __func__, "Reset was a WATCHDOG RESET",
+			 si->si_ptrs.test->post_codel);
+
+	if (!(si->si_ptrs.test->post_codel &
+	      CY_POST_CODEL_CFG_DATA_CRC_FAIL))
+		dev_info(cd->dev, "%s: %s codel=%02X\n", __func__,
+			 "Config Data CRC FAIL",
+			 si->si_ptrs.test->post_codel);
+
+	if (!(si->si_ptrs.test->post_codel &
+	      CY_POST_CODEL_PANEL_TEST_FAIL))
+		dev_info(cd->dev, "%s: %s codel=%02X\n",
+			 __func__, "PANEL TEST FAIL",
+			 si->si_ptrs.test->post_codel);
+
+	dev_info(cd->dev, "%s: SCANNING is %s codel=%02X\n",
+		 __func__, si->si_ptrs.test->post_codel & 0x08 ?
+		 "ENABLED" : "DISABLED",
+		 si->si_ptrs.test->post_codel);
+	return rc;
+}
+
+static int cyttsp4_si_get_pcfg_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	si->si_ofs.pcfg_size = si->si_ofs.opcfg_ofs - si->si_ofs.pcfg_ofs;
+
+	p = krealloc(si->si_ptrs.pcfg, si->si_ofs.pcfg_size, GFP_KERNEL);
+	if (p == NULL) {
+		rc = -ENOMEM;
+		dev_err(cd->dev, "%s: fail alloc pcfg memory r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+	si->si_ptrs.pcfg = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.pcfg_ofs, si->si_ofs.pcfg_size,
+			si->si_ptrs.pcfg);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read pcfg data r=%d\n",
+			__func__, rc);
+		return rc;
+	}
+
+	si->si_ofs.max_x = merge_bytes((si->si_ptrs.pcfg->res_xh
+			& CY_PCFG_RESOLUTION_X_MASK), si->si_ptrs.pcfg->res_xl);
+	si->si_ofs.x_origin = !!(si->si_ptrs.pcfg->res_xh
+			& CY_PCFG_ORIGIN_X_MASK);
+	si->si_ofs.max_y = merge_bytes((si->si_ptrs.pcfg->res_yh
+			& CY_PCFG_RESOLUTION_Y_MASK), si->si_ptrs.pcfg->res_yl);
+	si->si_ofs.y_origin = !!(si->si_ptrs.pcfg->res_yh
+			& CY_PCFG_ORIGIN_Y_MASK);
+	si->si_ofs.max_p = merge_bytes(si->si_ptrs.pcfg->max_zh,
+			si->si_ptrs.pcfg->max_zl);
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+		       (u8 *)si->si_ptrs.pcfg,
+		       si->si_ofs.pcfg_size, "sysinfo_pcfg_data");
+	return rc;
+}
+
+static int cyttsp4_si_get_opcfg_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	struct cyttsp4_tch_abs_params *tch;
+	struct cyttsp4_tch_rec_params *tch_old, *tch_new;
+	enum cyttsp4_tch_abs abs;
+	int i;
+	void *p;
+	int rc;
+
+	si->si_ofs.opcfg_size = si->si_ofs.ddata_ofs - si->si_ofs.opcfg_ofs;
+
+	p = krealloc(si->si_ptrs.opcfg, si->si_ofs.opcfg_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc opcfg memory\n", __func__);
+		rc = -ENOMEM;
+		goto cyttsp4_si_get_opcfg_data_exit;
+	}
+	si->si_ptrs.opcfg = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.opcfg_ofs, si->si_ofs.opcfg_size,
+			si->si_ptrs.opcfg);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: fail read opcfg data r=%d\n",
+			__func__, rc);
+		goto cyttsp4_si_get_opcfg_data_exit;
+	}
+	si->si_ofs.cmd_ofs = si->si_ptrs.opcfg->cmd_ofs;
+	si->si_ofs.rep_ofs = si->si_ptrs.opcfg->rep_ofs;
+	si->si_ofs.rep_sz = (si->si_ptrs.opcfg->rep_szh * 256) +
+		si->si_ptrs.opcfg->rep_szl;
+	si->si_ofs.num_btns = si->si_ptrs.opcfg->num_btns;
+	si->si_ofs.num_btn_regs = (si->si_ofs.num_btns +
+		CY_NUM_BTN_PER_REG - 1) / CY_NUM_BTN_PER_REG;
+	si->si_ofs.tt_stat_ofs = si->si_ptrs.opcfg->tt_stat_ofs;
+	si->si_ofs.obj_cfg0 = si->si_ptrs.opcfg->obj_cfg0;
+	si->si_ofs.max_tchs = si->si_ptrs.opcfg->max_tchs &
+		CY_BYTE_OFS_MASK;
+	si->si_ofs.tch_rec_size = si->si_ptrs.opcfg->tch_rec_size &
+		CY_BYTE_OFS_MASK;
+
+	/* Get the old touch fields */
+	for (abs = CY_TCH_X; abs < CY_NUM_TCH_FIELDS; abs++) {
+		tch = &si->si_ofs.tch_abs[abs];
+		tch_old = &si->si_ptrs.opcfg->tch_rec_old[abs];
+
+		tch->ofs = tch_old->loc & CY_BYTE_OFS_MASK;
+		tch->size = cyttsp4_bits_2_bytes(tch_old->size,
+						 &tch->max);
+		tch->bofs = (tch_old->loc & CY_BOFS_MASK) >> CY_BOFS_SHIFT;
+	}
+
+	/* button fields */
+	si->si_ofs.btn_rec_size = si->si_ptrs.opcfg->btn_rec_size;
+	si->si_ofs.btn_diff_ofs = si->si_ptrs.opcfg->btn_diff_ofs;
+	si->si_ofs.btn_diff_size = si->si_ptrs.opcfg->btn_diff_size;
+
+	if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) {
+		/* Get the extended touch fields */
+		for (i = 0; i < CY_NUM_EXT_TCH_FIELDS; abs++, i++) {
+			tch = &si->si_ofs.tch_abs[abs];
+			tch_new = &si->si_ptrs.opcfg->tch_rec_new[i];
+
+			tch->ofs = tch_new->loc & CY_BYTE_OFS_MASK;
+			tch->size = cyttsp4_bits_2_bytes(tch_new->size,
+							 &tch->max);
+			tch->bofs = (tch_new->loc & CY_BOFS_MASK) >> CY_BOFS_SHIFT;
+		}
+	}
+
+	for (abs = 0; abs < CY_TCH_NUM_ABS; abs++) {
+		dev_dbg(cd->dev, "%s: tch_rec_%s\n", __func__,
+			cyttsp4_tch_abs_string[abs]);
+		dev_dbg(cd->dev, "%s:     ofs =%2Zd\n", __func__,
+			si->si_ofs.tch_abs[abs].ofs);
+		dev_dbg(cd->dev, "%s:     siz =%2Zd\n", __func__,
+			si->si_ofs.tch_abs[abs].size);
+		dev_dbg(cd->dev, "%s:     max =%2Zd\n", __func__,
+			si->si_ofs.tch_abs[abs].max);
+		dev_dbg(cd->dev, "%s:     bofs=%2Zd\n", __func__,
+			si->si_ofs.tch_abs[abs].bofs);
+	}
+
+	si->si_ofs.mode_size = si->si_ofs.tt_stat_ofs + 1;
+	si->si_ofs.data_size = si->si_ofs.max_tchs *
+		si->si_ptrs.opcfg->tch_rec_size;
+
+	cyttsp4_pr_buf(cd->dev, cd->pr_buf, (u8 *)si->si_ptrs.opcfg,
+		si->si_ofs.opcfg_size, "sysinfo_opcfg_data");
+
+cyttsp4_si_get_opcfg_data_exit:
+	return rc;
+}
+
+static int cyttsp4_si_get_ddata(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	si->si_ofs.ddata_size = si->si_ofs.mdata_ofs - si->si_ofs.ddata_ofs;
+
+	p = krealloc(si->si_ptrs.ddata, si->si_ofs.ddata_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc ddata memory\n", __func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.ddata = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.ddata_ofs, si->si_ofs.ddata_size,
+			si->si_ptrs.ddata);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: fail read ddata data r=%d\n",
+			__func__, rc);
+	else
+		cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+			       (u8 *)si->si_ptrs.ddata,
+			       si->si_ofs.ddata_size, "sysinfo_ddata");
+	return rc;
+}
+
+static int cyttsp4_si_get_mdata(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+	int rc;
+
+	si->si_ofs.mdata_size = si->si_ofs.map_sz - si->si_ofs.mdata_ofs;
+
+	p = krealloc(si->si_ptrs.mdata, si->si_ofs.mdata_size, GFP_KERNEL);
+	if (p == NULL) {
+		dev_err(cd->dev, "%s: fail alloc mdata memory\n", __func__);
+		return -ENOMEM;
+	}
+	si->si_ptrs.mdata = p;
+
+	rc = cyttsp4_adap_read(cd, si->si_ofs.mdata_ofs, si->si_ofs.mdata_size,
+			si->si_ptrs.mdata);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: fail read mdata data r=%d\n",
+			__func__, rc);
+	else
+		cyttsp4_pr_buf(cd->dev, cd->pr_buf,
+			       (u8 *)si->si_ptrs.mdata,
+			       si->si_ofs.mdata_size, "sysinfo_mdata");
+	return rc;
+}
+
+static int cyttsp4_si_get_btn_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int btn;
+	int num_defined_keys;
+	u16 *key_table;
+	void *p;
+	int rc = 0;
+
+	if (si->si_ofs.num_btns) {
+		si->si_ofs.btn_keys_size = si->si_ofs.num_btns *
+			sizeof(struct cyttsp4_btn);
+
+		p = krealloc(si->btn, si->si_ofs.btn_keys_size,
+				GFP_KERNEL|__GFP_ZERO);
+		if (p == NULL) {
+			dev_err(cd->dev, "%s: %s\n", __func__,
+				"fail alloc btn_keys memory");
+			return -ENOMEM;
+		}
+		si->btn = p;
+
+		if (cd->cpdata->sett[CY_IC_GRPNUM_BTN_KEYS] == NULL)
+			num_defined_keys = 0;
+		else if (cd->cpdata->sett[CY_IC_GRPNUM_BTN_KEYS]->data == NULL)
+			num_defined_keys = 0;
+		else
+			num_defined_keys = cd->cpdata->sett
+				[CY_IC_GRPNUM_BTN_KEYS]->size;
+
+		for (btn = 0; btn < si->si_ofs.num_btns &&
+			btn < num_defined_keys; btn++) {
+			key_table = (u16 *)cd->cpdata->sett
+				[CY_IC_GRPNUM_BTN_KEYS]->data;
+			si->btn[btn].key_code = key_table[btn];
+			si->btn[btn].state = CY_BTN_RELEASED;
+			si->btn[btn].enabled = true;
+		}
+		for (; btn < si->si_ofs.num_btns; btn++) {
+			si->btn[btn].key_code = KEY_RESERVED;
+			si->btn[btn].state = CY_BTN_RELEASED;
+			si->btn[btn].enabled = true;
+		}
+
+		return rc;
+	}
+
+	si->si_ofs.btn_keys_size = 0;
+	kfree(si->btn);
+	si->btn = NULL;
+	return rc;
+}
+
+static int cyttsp4_si_get_op_data_ptrs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	void *p;
+
+	p = krealloc(si->xy_mode, si->si_ofs.mode_size, GFP_KERNEL|__GFP_ZERO);
+	if (p == NULL)
+		return -ENOMEM;
+	si->xy_mode = p;
+
+	p = krealloc(si->xy_data, si->si_ofs.data_size, GFP_KERNEL|__GFP_ZERO);
+	if (p == NULL)
+		return -ENOMEM;
+	si->xy_data = p;
+
+	p = krealloc(si->btn_rec_data,
+			si->si_ofs.btn_rec_size * si->si_ofs.num_btns,
+			GFP_KERNEL|__GFP_ZERO);
+	if (p == NULL)
+		return -ENOMEM;
+	si->btn_rec_data = p;
+
+	return 0;
+}
+
+static void cyttsp4_si_put_log_data(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	dev_dbg(cd->dev, "%s: cydata_ofs =%4Zd siz=%4Zd\n", __func__,
+		si->si_ofs.cydata_ofs, si->si_ofs.cydata_size);
+	dev_dbg(cd->dev, "%s: test_ofs   =%4Zd siz=%4Zd\n", __func__,
+		si->si_ofs.test_ofs, si->si_ofs.test_size);
+	dev_dbg(cd->dev, "%s: pcfg_ofs   =%4Zd siz=%4Zd\n", __func__,
+		si->si_ofs.pcfg_ofs, si->si_ofs.pcfg_size);
+	dev_dbg(cd->dev, "%s: opcfg_ofs  =%4Zd siz=%4Zd\n", __func__,
+		si->si_ofs.opcfg_ofs, si->si_ofs.opcfg_size);
+	dev_dbg(cd->dev, "%s: ddata_ofs  =%4Zd siz=%4Zd\n", __func__,
+		si->si_ofs.ddata_ofs, si->si_ofs.ddata_size);
+	dev_dbg(cd->dev, "%s: mdata_ofs  =%4Zd siz=%4Zd\n", __func__,
+		si->si_ofs.mdata_ofs, si->si_ofs.mdata_size);
+
+	dev_dbg(cd->dev, "%s: cmd_ofs       =%4Zd\n", __func__,
+		si->si_ofs.cmd_ofs);
+	dev_dbg(cd->dev, "%s: rep_ofs       =%4Zd\n", __func__,
+		si->si_ofs.rep_ofs);
+	dev_dbg(cd->dev, "%s: rep_sz        =%4Zd\n", __func__,
+		si->si_ofs.rep_sz);
+	dev_dbg(cd->dev, "%s: num_btns      =%4Zd\n", __func__,
+		si->si_ofs.num_btns);
+	dev_dbg(cd->dev, "%s: num_btn_regs  =%4Zd\n", __func__,
+		si->si_ofs.num_btn_regs);
+	dev_dbg(cd->dev, "%s: tt_stat_ofs   =%4Zd\n", __func__,
+		si->si_ofs.tt_stat_ofs);
+	dev_dbg(cd->dev, "%s: tch_rec_size  =%4Zd\n", __func__,
+		si->si_ofs.tch_rec_size);
+	dev_dbg(cd->dev, "%s: max_tchs      =%4Zd\n", __func__,
+		si->si_ofs.max_tchs);
+	dev_dbg(cd->dev, "%s: mode_size     =%4Zd\n", __func__,
+		si->si_ofs.mode_size);
+	dev_dbg(cd->dev, "%s: data_size     =%4Zd\n", __func__,
+		si->si_ofs.data_size);
+	dev_dbg(cd->dev, "%s: map_sz        =%4Zd\n", __func__,
+		si->si_ofs.map_sz);
+
+	dev_dbg(cd->dev, "%s: btn_rec_size   =%2Zd\n", __func__,
+		si->si_ofs.btn_rec_size);
+	dev_dbg(cd->dev, "%s: btn_diff_ofs   =%2Zd\n", __func__,
+		si->si_ofs.btn_diff_ofs);
+	dev_dbg(cd->dev, "%s: btn_diff_size  =%2Zd\n", __func__,
+		si->si_ofs.btn_diff_size);
+
+	dev_dbg(cd->dev, "%s: max_x    = 0x%04ZX (%Zd)\n", __func__,
+		si->si_ofs.max_x, si->si_ofs.max_x);
+	dev_dbg(cd->dev, "%s: x_origin = %Zd (%s)\n", __func__,
+		si->si_ofs.x_origin,
+		si->si_ofs.x_origin == CY_NORMAL_ORIGIN ?
+		"left corner" : "right corner");
+	dev_dbg(cd->dev, "%s: max_y    = 0x%04ZX (%Zd)\n", __func__,
+		si->si_ofs.max_y, si->si_ofs.max_y);
+	dev_dbg(cd->dev, "%s: y_origin = %Zd (%s)\n", __func__,
+		si->si_ofs.y_origin,
+		si->si_ofs.y_origin == CY_NORMAL_ORIGIN ?
+		"upper corner" : "lower corner");
+	dev_dbg(cd->dev, "%s: max_p    = 0x%04ZX (%Zd)\n", __func__,
+		si->si_ofs.max_p, si->si_ofs.max_p);
+
+	dev_dbg(cd->dev, "%s: xy_mode=%p xy_data=%p\n", __func__,
+		si->xy_mode, si->xy_data);
+}
+
+static int cyttsp4_get_sysinfo_regs(struct cyttsp4 *cd)
+{
+	struct cyttsp4_sysinfo *si = &cd->sysinfo;
+	int rc;
+
+	rc = cyttsp4_si_data_offsets(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_cydata(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_test_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_pcfg_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_opcfg_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_ddata(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_mdata(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_btn_data(cd);
+	if (rc < 0)
+		return rc;
+
+	rc = cyttsp4_si_get_op_data_ptrs(cd);
+	if (rc < 0) {
+		dev_err(cd->dev, "%s: failed to get_op_data\n",
+			__func__);
+		return rc;
+	}
+
+	cyttsp4_si_put_log_data(cd);
+
+	/* provide flow control handshake */
+	rc = cyttsp4_handshake(cd, si->si_data.hst_mode);
+	if (rc < 0)
+		dev_err(cd->dev, "%s: handshake fail on sysinfo reg\n",
+			__func__);
+
+	si->ready = true;
+	return rc;
+}
+
+static void cyttsp4_queue_startup_(struct cyttsp4 *cd)
+{
+	if (cd->startup_state == STARTUP_NONE) {
+		cd->startup_state = STARTUP_QUEUED;
+		schedule_work(&cd->startup_work);
+		dev_dbg(cd->dev, "%s: cyttsp4_startup queued\n", __func__);
+	} else {
+		dev_dbg(cd->dev, "%s: startup_state = %d\n", __func__,
+			cd->startup_state);
+	}
+}
+
+static void cyttsp4_report_slot_liftoff(struct cyttsp4_mt_data *md,
+		int max_slots)
+{
+	int t;
+
+	if (md->num_prv_tch == 0)
+		return;
+
+	for (t = 0; t < max_slots; t++) {
+		input_mt_slot(md->input, t);
+		input_mt_report_slot_state(md->input,
+			MT_TOOL_FINGER, false);
+	}
+}
+
+static void cyttsp4_lift_all(struct cyttsp4_mt_data *md)
+{
+	if (!md->si)
+		return;
+
+	if (md->num_prv_tch != 0) {
+		cyttsp4_report_slot_liftoff(md,
+				md->si->si_ofs.tch_abs[CY_TCH_T].max);
+		input_sync(md->input);
+		md->num_prv_tch = 0;
+	}
+}
+
+static void cyttsp4_get_touch_axis(struct cyttsp4_mt_data *md,
+	int *axis, int size, int max, u8 *xy_data, int bofs)
+{
+	int nbyte;
+	int next;
+
+	for (nbyte = 0, *axis = 0, next = 0; nbyte < size; nbyte++) {
+		dev_vdbg(&md->input->dev,
+			"%s: *axis=%02X(%d) size=%d max=%08X xy_data=%p"
+			" xy_data[%d]=%02X(%d) bofs=%d\n",
+			__func__, *axis, *axis, size, max, xy_data, next,
+			xy_data[next], xy_data[next], bofs);
+		*axis = (*axis * 256) + (xy_data[next] >> bofs);
+		next++;
+	}
+
+	*axis &= max - 1;
+
+	dev_vdbg(&md->input->dev,
+		"%s: *axis=%02X(%d) size=%d max=%08X xy_data=%p"
+		" xy_data[%d]=%02X(%d)\n",
+		__func__, *axis, *axis, size, max, xy_data, next,
+		xy_data[next], xy_data[next]);
+}
+
+static void cyttsp4_get_touch(struct cyttsp4_mt_data *md,
+	struct cyttsp4_touch *touch, u8 *xy_data)
+{
+	struct device *dev = &md->input->dev;
+	struct cyttsp4_sysinfo *si = md->si;
+	enum cyttsp4_tch_abs abs;
+	int tmp;
+	bool flipped;
+
+	for (abs = CY_TCH_X; abs < CY_TCH_NUM_ABS; abs++) {
+		cyttsp4_get_touch_axis(md, &touch->abs[abs],
+			si->si_ofs.tch_abs[abs].size,
+			si->si_ofs.tch_abs[abs].max,
+			xy_data + si->si_ofs.tch_abs[abs].ofs,
+			si->si_ofs.tch_abs[abs].bofs);
+		dev_vdbg(dev, "%s: get %s=%04X(%d)\n", __func__,
+			cyttsp4_tch_abs_string[abs],
+			touch->abs[abs], touch->abs[abs]);
+	}
+
+	if (md->pdata->flags & CY_FLAG_FLIP) {
+		tmp = touch->abs[CY_TCH_X];
+		touch->abs[CY_TCH_X] = touch->abs[CY_TCH_Y];
+		touch->abs[CY_TCH_Y] = tmp;
+		flipped = true;
+	} else
+		flipped = false;
+
+	if (md->pdata->flags & CY_FLAG_INV_X) {
+		if (flipped)
+			touch->abs[CY_TCH_X] = md->si->si_ofs.max_y -
+				touch->abs[CY_TCH_X];
+		else
+			touch->abs[CY_TCH_X] = md->si->si_ofs.max_x -
+				touch->abs[CY_TCH_X];
+	}
+	if (md->pdata->flags & CY_FLAG_INV_Y) {
+		if (flipped)
+			touch->abs[CY_TCH_Y] = md->si->si_ofs.max_x -
+				touch->abs[CY_TCH_Y];
+		else
+			touch->abs[CY_TCH_Y] = md->si->si_ofs.max_y -
+				touch->abs[CY_TCH_Y];
+	}
+
+	dev_vdbg(dev, "%s: flip=%s inv-x=%s inv-y=%s x=%04X(%d) y=%04X(%d)\n",
+		__func__, flipped ? "true" : "false",
+		md->pdata->flags & CY_FLAG_INV_X ? "true" : "false",
+		md->pdata->flags & CY_FLAG_INV_Y ? "true" : "false",
+		touch->abs[CY_TCH_X], touch->abs[CY_TCH_X],
+		touch->abs[CY_TCH_Y], touch->abs[CY_TCH_Y]);
+}
+
+static void cyttsp4_final_sync(struct input_dev *input, int max_slots, int *ids)
+{
+	int t;
+
+	for (t = 0; t < max_slots; t++) {
+		if (ids[t])
+			continue;
+		input_mt_slot(input, t);
+		input_mt_report_slot_state(input, MT_TOOL_FINGER, false);
+	}
+
+	input_sync(input);
+}
+
+static void cyttsp4_get_mt_touches(struct cyttsp4_mt_data *md, int num_cur_tch)
+{
+	struct device *dev = &md->input->dev;
+	struct cyttsp4_sysinfo *si = md->si;
+	struct cyttsp4_touch tch;
+	int sig;
+	int i, j, t = 0;
+	int ids[max(CY_TMA1036_MAX_TCH, CY_TMA4XX_MAX_TCH)];
+
+	memset(ids, 0, si->si_ofs.tch_abs[CY_TCH_T].max * sizeof(int));
+	for (i = 0; i < num_cur_tch; i++) {
+		cyttsp4_get_touch(md, &tch, si->xy_data +
+			(i * si->si_ofs.tch_rec_size));
+		if ((tch.abs[CY_TCH_T] < md->pdata->frmwrk->abs
+			[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MIN_OST]) ||
+			(tch.abs[CY_TCH_T] > md->pdata->frmwrk->abs
+			[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MAX_OST])) {
+			dev_err(dev, "%s: tch=%d -> bad trk_id=%d max_id=%d\n",
+				__func__, i, tch.abs[CY_TCH_T],
+				md->pdata->frmwrk->abs[(CY_ABS_ID_OST *
+				CY_NUM_ABS_SET) + CY_MAX_OST]);
+			continue;
+		}
+
+		/* use 0 based track id's */
+		sig = md->pdata->frmwrk->abs
+			[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + 0];
+		if (sig != CY_IGNORE_VALUE) {
+			t = tch.abs[CY_TCH_T] - md->pdata->frmwrk->abs
+				[(CY_ABS_ID_OST * CY_NUM_ABS_SET) + CY_MIN_OST];
+			if (tch.abs[CY_TCH_E] == CY_EV_LIFTOFF) {
+				dev_dbg(dev, "%s: t=%d e=%d lift-off\n",
+					__func__, t, tch.abs[CY_TCH_E]);
+				goto cyttsp4_get_mt_touches_pr_tch;
+			}
+			input_mt_slot(md->input, t);
+			input_mt_report_slot_state(md->input, MT_TOOL_FINGER,
+					true);
+			ids[t] = true;
+		}
+
+		/* all devices: position and pressure fields */
+		for (j = 0; j <= CY_ABS_W_OST; j++) {
+			sig = md->pdata->frmwrk->abs[((CY_ABS_X_OST + j) *
+				CY_NUM_ABS_SET) + 0];
+			if (sig != CY_IGNORE_VALUE)
+				input_report_abs(md->input, sig,
+					tch.abs[CY_TCH_X + j]);
+		}
+		if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE) {
+			/*
+			 * TMA400 size and orientation fields:
+			 * if pressure is non-zero and major touch
+			 * signal is zero, then set major and minor touch
+			 * signals to minimum non-zero value
+			 */
+			if (tch.abs[CY_TCH_P] > 0 && tch.abs[CY_TCH_MAJ] == 0)
+				tch.abs[CY_TCH_MAJ] = tch.abs[CY_TCH_MIN] = 1;
+
+			/* Get the extended touch fields */
+			for (j = 0; j < CY_NUM_EXT_TCH_FIELDS; j++) {
+				sig = md->pdata->frmwrk->abs
+					[((CY_ABS_MAJ_OST + j) *
+					CY_NUM_ABS_SET) + 0];
+				if (sig != CY_IGNORE_VALUE)
+					input_report_abs(md->input, sig,
+						tch.abs[CY_TCH_MAJ + j]);
+			}
+		}
+
+cyttsp4_get_mt_touches_pr_tch:
+		if (si->si_ofs.tch_rec_size > CY_TMA1036_TCH_REC_SIZE)
+			dev_dbg(dev,
+				"%s: t=%d x=%d y=%d z=%d M=%d m=%d o=%d e=%d\n",
+				__func__, t,
+				tch.abs[CY_TCH_X],
+				tch.abs[CY_TCH_Y],
+				tch.abs[CY_TCH_P],
+				tch.abs[CY_TCH_MAJ],
+				tch.abs[CY_TCH_MIN],
+				tch.abs[CY_TCH_OR],
+				tch.abs[CY_TCH_E]);
+		else
+			dev_dbg(dev,
+				"%s: t=%d x=%d y=%d z=%d e=%d\n", __func__,
+				t,
+				tch.abs[CY_TCH_X],
+				tch.abs[CY_TCH_Y],
+				tch.abs[CY_TCH_P],
+				tch.abs[CY_TCH_E]);
+	}
+
+	cyttsp4_final_sync(md->input, si->si_ofs.tch_abs[CY_TCH_T].max, ids);
+
+	md->num_prv_tch = num_cur_tch;
+
+	return;
+}
+
+/* read xy_data for all current touches */
+static int cyttsp4_xy_worker(struct cyttsp4 *cd)
+{
+	struct cyttsp4_mt_data *md = &cd->md;
+	struct device *dev = &md->input->dev;
+	struct cyttsp4_sysinfo *si = md->si;
+	u8 num_cur_tch;
+	u8 hst_mode;
+	u8 rep_len;
+	u8 rep_stat;
+	u8 tt_stat;
+	int rc = 0;
+
+	/*
+	 * Get event data from cyttsp4 device.
+	 * The event data includes all data
+	 * for all active touches.
+	 * Event data also includes button data
+	 */
+	/*
+	 * Use 2 reads:
+	 * 1st read to get mode + button bytes + touch count (core)
+	 * 2nd read (optional) to get touch 1 - touch n data
+	 */
+	hst_mode = si->xy_mode[CY_REG_BASE];
+	rep_len = si->xy_mode[si->si_ofs.rep_ofs];
+	rep_stat = si->xy_mode[si->si_ofs.rep_ofs + 1];
+	tt_stat = si->xy_mode[si->si_ofs.tt_stat_ofs];
+	dev_vdbg(dev, "%s: %s%02X %s%d %s%02X %s%02X\n", __func__,
+		"hst_mode=", hst_mode, "rep_len=", rep_len,
+		"rep_stat=", rep_stat, "tt_stat=", tt_stat);
+
+	num_cur_tch = GET_NUM_TOUCHES(tt_stat);
+	dev_vdbg(dev, "%s: num_cur_tch=%d\n", __func__, num_cur_tch);
+
+	if (rep_len == 0 && num_cur_tch > 0) {
+		dev_err(dev, "%s: report length error rep_len=%d num_tch=%d\n",
+			__func__, rep_len, num_cur_tch);
+		goto cyttsp4_xy_worker_exit;
+	}
+
+	/* read touches */
+	if (num_cur_tch > 0) {
+		rc = cyttsp4_adap_read(cd, si->si_ofs.tt_stat_ofs + 1,
+				num_cur_tch * si->si_ofs.tch_rec_size,
+				si->xy_data);
+		if (rc < 0) {
+			dev_err(dev, "%s: read fail on touch regs r=%d\n",
+				__func__, rc);
+			goto cyttsp4_xy_worker_exit;
+		}
+	}
+
+	/* print xy data */
+	cyttsp4_pr_buf(dev, cd->pr_buf, si->xy_data, num_cur_tch *
+		si->si_ofs.tch_rec_size, "xy_data");
+
+	/* check any error conditions */
+	if (IS_BAD_PKT(rep_stat)) {
+		dev_dbg(dev, "%s: Invalid buffer detected\n", __func__);
+		rc = 0;
+		goto cyttsp4_xy_worker_exit;
+	}
+
+	if (IS_LARGE_AREA(tt_stat))
+		dev_dbg(dev, "%s: Large area detected\n", __func__);
+
+	if (num_cur_tch > si->si_ofs.max_tchs) {
+		dev_err(dev, "%s: too many tch; set to max tch (n=%d c=%Zd)\n",
+				__func__, num_cur_tch, si->si_ofs.max_tchs);
+		num_cur_tch = si->si_ofs.max_tchs;
+	}
+
+	/* extract xy_data for all currently reported touches */
+	dev_vdbg(dev, "%s: extract data num_cur_tch=%d\n", __func__,
+		num_cur_tch);
+	if (num_cur_tch)